CN216703982U - Oxygen-enriched solution adding system - Google Patents
Oxygen-enriched solution adding system Download PDFInfo
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- CN216703982U CN216703982U CN202122473861.XU CN202122473861U CN216703982U CN 216703982 U CN216703982 U CN 216703982U CN 202122473861 U CN202122473861 U CN 202122473861U CN 216703982 U CN216703982 U CN 216703982U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses an oxygen-enriched solution adding system. The device comprises a reaction tank, a diffuser, an oxygen pipeline and a mixed water pipeline; a water spray nozzle and an oxygen nozzle are arranged on the top of the reaction tank; a water pump is arranged on the mixed water pipeline; the oxygen pipeline is provided with a pressure regulating valve group; the outlet at the bottom of the reaction tank is connected with the inlet of the diffuser; a control valve or a flow limiting orifice plate or a throttling hole which can accurately control the flow and the pressure is arranged on a pipeline between an outlet at the bottom of the reaction tank and an inlet of the diffuser; the diffuser is arranged in the water to be treated; the cylindrical side wall of the diffuser is provided with a channel for releasing the oxygen-enriched solution, namely a small hole or a narrow gap, or a combination of the small hole and the narrow gap; the channel for releasing the oxygen-enriched solution can generate certain back pressure and enables the supersaturated oxygen-enriched solution to be sprayed into the water to be treated at certain outlet pressure, and the pressure difference of more than 2bar between the outlet pressure of the diffuser and the pressure of the water to be treated is ensured. The system can accurately adjust the water quality, can greatly reduce the generation of bubbles and greatly improve the utilization rate of oxygen.
Description
Technical Field
The utility model belongs to the technical field of water treatment, and relates to an oxygen-enriched solution adding system. The oxygen-enriched solution adding system is used for adding an oxygen-enriched solution into water so as to increase the dissolved oxygen amount of the water body.
Background
Dissolved oxygen is an important water quality chemical parameter, under the natural condition, the oxygen content in the air does not change greatly, the oxygen dissolution rate in water bodies at different altitudes is slightly different, and the dissolved oxygen is generated in the water bodies mainly due to the activity of algae. The amount of dissolved oxygen in water is an index for measuring the self-purification capacity of water. Along with the increasing of human activities and industrialization, the problem of water body oxygenation becomes more and more serious, the oxygenation of the water body can lead to the reduction of oxygen content in water, the decomposition of organic matters in water and the consumption of oxygen by the respiration of organisms are mainly caused by the photosynthesis of algae and the natural dissolution of oxygen in air, but the dissolved oxygen content can be influenced at different degrees by day and night illumination time, air pressure, natural disasters, seasonal changes, water temperature changes and the consumption and death and decomposition of animals and plants in the water body, so that anaerobic microorganisms are propagated in large quantity, harmful fermentation intermediates are generated, and the water quality is deteriorated; the oxidation of the water body is influenced to neutralize toxic and harmful substances such as hydrogen sulfide and nitrite, the decomposition of ammonia nitrogen and organic matters in the water body is degraded, and the regeneration … of phosphate and nitrate shows the importance of controlling the dissolved oxygen and the dissolved oxygen amount in the water body.
The definition of dissolved oxygen refers to the simple substance of oxygen dissolved in water in molecular state, not the element of oxygen in compound state, and not the bubble of oxygen, the abbreviation of dissolved oxygen is DO, and the reversible process of dissolving oxygen in water, oxygen is dissolved in water and can also escape from water.
For different purposes, people need to manually intervene to increase the dissolved oxygen amount of the water body, and the traditional process mainly comprises methods of aeration, addition of an oxygenation agent and the like. The method for increasing the dissolved oxygen in water by using mechanical aeration usually utilizes an aeration head to inject air into a water body and then stir, when the water area is large, a plurality of aeration heads need to be arranged, and the process has the advantages of time and energy consumption, and simultaneously increases the turbidity of the water body and has certain limitation; the method for adding chemical reagents (commonly used ammonium persulfate, calcium peroxide, hydrogen peroxide and the like) into water to increase dissolved oxygen has the advantages that the adding amount is not easy to control: when the adding amount per unit time is too large, the oxygen utilization efficiency is lower, and the adding amount per unit time is reduced by manual or mechanical adding to prolong the adding time, so that the difficulty of management and implementation is increased, and time and labor are wasted.
At present, under the guidance of relevant national policies, many gas plants all over the country are equipped with oxygen purification equipment on a large scale and produce high-purity oxygen, so that the price of the oxygen is greatly reduced, and the oxygen is convenient for users to purchase locally. Because the oxygen resource is easy to obtain, and full-automatic feeding design is adopted, the operation cost of the oxygen-enriched solution feeding system is greatly reduced.
In addition to the conventional aeration using an aeration head, there is also a method using aeration in which water to be treated is mixed with oxygen by a venturi nozzle or a static mixer and then the mixed solution is added to the water to be treated, which can be added to a shallow pool and a high-concentration oxygen-enriched solution pipe, but also suffers from problems of escape of small bubbles of oxygen and low efficiency of dissolved oxygen.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide an oxygen-enriched solution adding system which is used for adding an oxygen-enriched solution into water to increase the dissolved oxygen amount of a water body and can greatly improve the utilization rate of oxygen.
The technical concept of the utility model is as follows: feeding gaseous oxygen with a certain pressure and dissolved water with a certain pressure into a reaction tank, mixing the gas and the water in the tank according to a certain proportion, and generating a high-concentration oxygen-enriched solution under the action of pressure in the tank; then the saturated high-concentration oxygen-enriched solution is sealed between the reaction tank and the control valve through a control valve, so that the saturated high-concentration oxygen-enriched solution is changed into a supersaturated high-concentration oxygen-enriched solution; and finally, reversely injecting the supersaturated high-concentration oxygen-enriched solution into the water to be treated through the diffuser, so that the high-concentration oxygen-enriched solution is instantly fused with the water, the concentration of dissolved oxygen in the water body is increased, the generation of bubbles can be greatly reduced, and the utilization rate of oxygen is greatly improved.
The purpose of the utility model is realized by the following technical scheme:
the utility model relates to an oxygen-enriched solution adding system, which comprises a reaction tank, a diffuser, an oxygen pipeline and a mixed water pipeline, wherein the reaction tank is connected with the diffuser through the oxygen pipeline; a water mist nozzle and an oxygen nozzle are arranged on the top of the tank in the reaction tank; a water pump is arranged on the mixed water pipeline; the outlet of the water pump is connected with the water inlet and the water mist nozzle on the top of the reaction tank through a mixed water pipeline; the oxygen pipeline is provided with a pressure regulating valve bank; the outlet of the pressure regulating valve group is connected with an oxygen inlet and an oxygen nozzle on the top of the reaction tank through an oxygen pipeline; an outlet at the bottom of the reaction tank is connected with an inlet of the diffuser through an oxygen-enriched solution pipeline; a control valve or a flow-limiting orifice plate or a throttling hole which can accurately control the flow and the pressure is arranged on an oxygen-enriched solution pipeline between an outlet at the bottom of the reaction tank and an inlet of the diffuser; the diffuser is arranged in the water to be treated; the diffuser is a hollow cylindrical object with one open end and the other closed end; a channel for releasing the oxygen-enriched solution is arranged on the cylindrical side wall of the diffuser; the channel for releasing the oxygen-enriched solution is a small hole or a narrow gap, or a combination of the small hole and the narrow gap; the channel for releasing the oxygen-enriched solution can generate a certain back pressure and enables the supersaturated oxygen-enriched solution to be sprayed into the water to be treated at a certain outlet pressure, so that the pressure difference of more than 2bar is ensured between the outlet pressure of the diffuser and the pressure of the water to be treated; the oxygen-enriched solution is a high-concentration oxygen-enriched solution or a high-concentration dissolved oxygen solution;
the diffuser is arranged in raw water or a water pipeline which flows by water to be treated and is positioned at the upstream of the water flow, and a passage for releasing the oxygen-enriched solution is arranged on one half side wall of the diffuser; the channels for releasing the oxygen-enriched solution are one or more, or one or more rows; the diffuser is inserted into the raw water or the water pipeline in a direction perpendicular to the water flow direction, one side of the diffuser, which is provided with a channel for releasing the oxygen-enriched solution, is right opposite to the upstream of the water flow, so that the oxygen-enriched solution in the diffuser can be reversely ejected from the channel for releasing the oxygen-enriched solution opposite to the water flow and can generate a vortex reinforced mixing effect;
alternatively, the diffuser is placed in a basin, pond or tank to be treated, where no water flows, on both side walls or on the entire cylindrical side wall of the diffuser, there are opened a plurality or more rows of channels releasing the oxygen-enriched solution.
Further, the channel for releasing the highly concentrated oxygen-enriched solution is capable of generating a back pressure of more than 2bar and injecting the supersaturated highly concentrated oxygen-enriched solution into the water to be treated at an outlet pressure of more than 2 bar.
Furthermore, the inlet of the mixed water pipeline is connected with the oxygen-enriched water after the water to be treated is added with the oxygen-enriched solution (namely, the oxygen-enriched water after being treated by the oxygen-enriched solution adding system and the adding process is used as water for a water pump, namely, the mixed water is dissolved water): the water outlet at the lower part of the water pipeline or the raw water flowing with water to be treated is connected with the inlet of the water pump through a mixed water pipeline; or the water outlet of the pool, the pond or the sewage tank to be treated, which has no water flow, is connected with the inlet of the water pump through the mixed water pipeline.
When the dissolved oxygen of raw water is insufficient, after the dissolved oxygen adding system and the adding process are adopted to add high-concentration oxygen-enriched solution for treatment, the dissolved oxygen can be stabilized at a value required by a client, and oxygen-enriched water with the dissolved oxygen stabilized at the value required by the client after the dissolved oxygen adding system and the adding process are used as water for a water pump, namely water for dissolution. Such as: the oxygen content of raw water in a sewage plant is 1-4 PPM, the oxygen content required by a client is 5PPM, and oxygen-enriched outlet water which is stabilized at 5PPM and treated by the dissolved oxygen adding system and the adding process is used as water for a water pump. The oxygen content of the water in the farm fluctuates between 1 and 3PPM, the oxygen content required by a client is 10PPM, the oxygen content of the oxygen-enriched effluent treated by the dissolved oxygen adding system and the adding process is 10PPM, and the oxygen-enriched effluent stabilized at 10PPM after being treated by the dissolved oxygen adding system and the adding process is used as water for a water pump.
Further, the oxygen-enriched solution adding system also comprises a liquid oxygen storage tank, an electronic vaporizer or a fin heat exchanger which are sequentially connected with the inlet of the oxygen pipeline, or also comprises a Dewar tank or a steel cylinder which is connected with the inlet of the oxygen pipeline; a pressure regulating valve set is arranged on an oxygen pipeline connected with an oxygen inlet at the top of the reaction tank at the outlet of the electronic vaporizer or the fin heat exchanger or the outlet of the dewar tank or the steel cylinder;
the high-pressure low-temperature liquid oxygen is stored in the liquid oxygen storage tank, the liquid oxygen is discharged from the bottom of the liquid oxygen storage tank and is conveyed to the electronic vaporizer or the fin heat exchanger, and the electronic vaporizer or the fin heat exchanger continuously and quantitatively heats and gasifies the liquid oxygen into gaseous oxygen; alternatively, the oxygen is stored in a dewar or cylinder, from which it is released; the oxygen is adjusted to the pressure of more than 2bar by the pressure regulating valve group and is conveyed to the reaction tank by a pipeline. The gasified oxygen with the pressure of more than 2bar and the pressurized dissolved water which is pressurized to the pressure of more than 2bar by a water pump form a gas-water mixture at the top of the reaction tank; the gas-water mixture gradually forms saturated high-concentration oxygen-enriched solution in the reaction tank; the saturated high-concentration oxygen-enriched solution passes through a control valve which is arranged on a high-concentration oxygen-enriched solution pipeline between the reaction tank and the diffuser and can accurately control the flow and the pressure to form a supersaturated high-concentration oxygen-enriched solution; the supersaturated high-concentration oxygen-enriched solution is reversely sprayed into raw water or water at the upstream of water flow in a water pipeline or water in a water inlet pool, a pond or a sewage tank through a channel which is arranged on the diffuser and releases the high-concentration oxygen-enriched solution.
Furthermore, a water quality online detector (an online dissolved oxygen detector, an online dissolved oxygen measuring sensor, a dissolved oxygen probe and the like) is arranged at the downstream of the water flow in the raw water or water pipeline or at the water outlet of the pool, the pond or the sewage tank, the water quality online detector is connected with a signal receiver, and the signal receiver is connected with the input end of the PLC; the output end of the PLC is connected with the control valve; the water quality on-line detector transmits signals to the signal receiver in real time, and the signals received by the signal receiver are processed by the PLC and then control the opening size of the control valve so as to control the adding amount of the high-concentration oxygen-enriched solution, thereby achieving the dissolved oxygen value which is expected to be controlled by a user.
Furthermore, when the diffuser is arranged in raw water or a water pipeline to be treated and flowing with water, the diffuser is a hollow long cylindrical object with one half of the cross section being a polygon and the other half being an arc, and one end of the hollow long cylindrical object is closed, and a plurality of channels for releasing oxygen-enriched solution are arranged on the side wall of one half of one side of the polygon of the diffuser; the channel for releasing the oxygen-enriched solution is one or more rows of small holes, one or more rows of narrow gaps, or a combination of one or more rows of small holes and one or more rows of narrow gaps (namely a combination of the small holes and the narrow gaps); or may be one or more apertures, one or more narrow slits, or a combination of one or more apertures and one or more narrow slits (i.e., a combination of both apertures and narrow slits); the diffuser is inserted into the raw water in a direction perpendicular to the water flow, and the side of the diffuser with the small holes and/or the narrow gaps is opposite to the upstream of the water flow, so that the oxygen-enriched solution in the diffuser can be reversely sprayed out of the water flow from the small holes and/or the narrow gaps.
When the diffuser is arranged in a pool, a pond or a sewage tank which is to be treated and does not flow water, the diffuser which can realize 360-degree throwing can be designed into a hollow cylinder shape, and can also be designed into a hollow square cylinder shape with a polygonal (such as square, hexagon and the like) section on the premise of ensuring back pressure.
Furthermore, the holes and/or slits in each row are located on the same vertical line and are uniformly arranged.
Furthermore, a plurality of channels for releasing the oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels for releasing the oxygen-enriched solution on the same horizontal plane are arranged in an acute-angle central included angle manner, so that the oxygen-enriched solution is ejected towards the water flow direction to be mixed with the water to be treated at a certain outlet pressure (more than 3bar), and a vortex reinforced mixing effect can be generated.
Further, the small holes are designed for small-diameter pipes below DN25, that is, when the high-concentration oxygen-enriched solution pipe is a small-diameter pipe below DN25, the channel for releasing the oxygen-enriched solution is one or more rows of small holes, or a combination of one or more rows of small holes and one or more rows of narrow gaps; or one or more apertures, or a combination of one or more apertures and one or more narrow slits; the narrow gaps are more suitable for large-diameter pipelines larger than DN25, namely, when the high-concentration oxygen-enriched solution pipeline is a large-diameter pipeline larger than DN25, the channel for releasing the oxygen-enriched solution is one or more rows of narrow gaps, or a combination of one or more rows of small holes and one or more rows of narrow gaps; or one or more narrow slits, or a combination of one or more apertures and one or more narrow slits.
The working principle of the oxygen-enriched solution adding system is as follows: the high-pressure low-temperature liquid oxygen is stored in a liquid oxygen storage tank, the liquid oxygen comes out from the bottom of the liquid oxygen storage tank and is conveyed to an electronic vaporizer or a fin heat exchanger, and the liquid oxygen is converted into the oxygen continuously and quantitatively; alternatively, oxygen is stored in a dewar or bomb from which it is released; the pressure of the oxygen is adjusted to be more than 2bar through a pressure adjusting valve bank; oxygen with a pressure of 2bar or more is fed into the reaction tank from the tank top through an oxygen pipe, and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched water which is treated by the oxygen-enriched solution adding system and the adding process and then filtered to remove impurities) is pressurized to more than 2bar by a water pump, then is sent into the reaction tank from the top of the tank in a high-pressure mist form through a dissolved water pipeline, and the pressure in the tank is kept to be more than 2 bar; mixing oxygen with pressurized water in a reaction tank to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the oxygen is large, and the oxygen is quickly dissolved in the water and reacts to generate a high-concentration oxygen-enriched solution in a set pressure environment; with the continuous feeding of oxygen or the continuous feeding of water mist with certain pressure into the tank, the pressure in the tank is raised to a set pressure, and when the pressure in the reaction tank reaches more than 2bar continuously, the high-concentration oxygen-enriched solution in the tank is converted into saturated high-concentration oxygen-enriched solution; the saturated high-concentration oxygen-enriched solution is pumped to a control valve capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank, the control valve seals the saturated high-concentration oxygen-enriched solution between the reaction tank and the control valve, and the saturated high-concentration oxygen-enriched solution becomes supersaturated high-concentration oxygen-enriched solution due to the continuous pressure in the reaction tank; the control valve is opened, the supersaturated high-concentration oxygen-enriched solution passes through the valve core in the control valve, the supersaturated high-concentration oxygen-enriched solution passes through the pipeline and carries the diffuser, the passageway that releases the high-concentration oxygen-enriched solution through design on the diffuser is that mixed liquid that aperture and/or narrow gap formed high-concentration oxygen-enriched solution and a small amount of oxygen microbubble is by reverse jet to aquatic, high-concentration oxygen-enriched solution rapidly with water-soluble, when putting dissolved oxygen (increase dissolved oxygen volume), a small amount of oxygen microbubble is absorbed by rivers. The dissolved oxygen probe is arranged in water to be treated (the downstream of water flow in a raw water or water pipeline or the water outlet of a water pool, a pond or a sewage tank) and transmits a dissolved oxygen signal to the signal receiver on the control valve in real time, and the signal received by the signal receiver is processed by the PLC and then the opening size of the control valve is controlled so as to control the input amount of the high-concentration oxygen-enriched solution, thereby achieving the dissolved oxygen amount which a user wants to control.
A liquid level meter for outputting signals is arranged outside the tank body of the reaction tank, and the liquid level signals of the high-concentration oxygen-enriched solution in the tank are switched on and off by controlling a water pump and oxygen injection through a PLC processor. When the liquid level drops, the PLC processor controls the water pump and the switch for injecting oxygen to be switched on, so that high-concentration oxygen-enriched solution is generated, and the consumed high-concentration oxygen-enriched solution amount put into water is supplemented.
The oxygen is gasified and regulated to the pressure above 2bar, the dissolved water is pressurized to the pressure above 2bar by a water pump, and the oxygen and the dissolved water are mixed in a reaction tank and generate high-concentration oxygen-enriched solution under the pressure condition. The pressure of the system is kept to be more than 2bar, the saturated high-concentration oxygen-enriched solution can be further converted into the supersaturated high-concentration oxygen-enriched solution, and otherwise, the utilization rate of oxygen is influenced by more than 99%. Before the outlet of the diffuser, oxygen is 100% dissolved in water, and when the oxygen passes through a small hole and a narrow gap, a small amount of oxygen overflows from the solution in the form of bubbles due to pressure drop, so that the utilization rate of the whole oxygen is more than 99%.
The solubility of oxygen is temperature, pressure dependent: under the same pressure condition, the lower the temperature is, the higher the solubility is; under the same temperature condition, the higher the pressure is, the higher the solubility is; therefore, the generation of dissolved oxygen can be enhanced or accelerated by lowering the water temperature and increasing the pressure in the tank. The parameters of the water pump and the amount of oxygen can be selected according to the conditions of each usage scenario, such as water temperature, water pressure, water quality parameters of raw water (water to be treated), stable dissolved oxygen amount value desired by a user, the position of a high-concentration oxygen-enriched solution feeding point and the like.
The method of lowering the water temperature and raising the pressure inside the reactor can strengthen or speed the generation of oxygen-rich solution, and for example, the water cooling system … may have cooling liquid coil inside the reactor or supplementary cooling water pipe in the lower part of the reactor.
The water is mixed with the oxygen in the form of mist, so as to increase the contact area and accelerate the mixing to generate the oxygen-enriched solution, and the size of the mist and the mist mixture, such as nano-scale, is reduced by utilizing the principle. Therefore, the water mist nozzle at the top of the reaction tank can adopt an industrial acoustic nano-scale atomizer.
The utility model has the beneficial effects that:
the utility model provides an oxygen-enriched solution adding system, which is characterized in that gas oxygen and dissolved water (oxygen-enriched water which is treated by the oxygen-enriched solution adding system and adding process and then filtered to remove impurities) are fed into a reaction tank to be prepared into supersaturated high-concentration oxygen-enriched solution in advance, then the high-concentration oxygen-enriched solution is added into water through a diffuser, the high-concentration oxygen-enriched solution is rapidly dissolved with water, and a small amount of oxygen microbubbles are absorbed by water flow while dissolved oxygen is increased.
Compared with the prior art, the oxygen-enriched solution adding system has the following advantages:
1) in the utility model, gaseous oxygen with certain pressure and dissolved water with certain pressure (oxygen-enriched water which is treated by the oxygen-enriched solution adding system and adding process and then filtered to remove impurities) are fed into a reaction tank to be mixed in a certain proportion in the tank, and a high-concentration oxygen-enriched solution is generated under the action of the pressure in the tank; then the saturated high-concentration oxygen-enriched solution is sealed between the reaction tank and the control valve through a control valve, so that the saturated high-concentration oxygen-enriched solution is changed into a supersaturated high-concentration oxygen-enriched solution; and finally, the supersaturated high-concentration oxygen-enriched solution is reversely injected into the water to be treated through the diffuser, the high-concentration oxygen-enriched solution is rapidly dissolved with the water, a small amount of oxygen microbubbles are absorbed by water flow while dissolved oxygen is increased, the generation of bubbles can be greatly reduced, the utilization rate of the oxygen can be greatly improved, and the dissolved oxygen amount can be accurately controlled.
2) The supersaturated high-concentration oxygen-enriched solution is put into water through a diffuser, and because the pressure of the water is in a low-pressure state, the diffuser is designed to prevent a large amount of oxygen bubbles in the mixed solution from escaping in pressure drop. The supersaturated high-concentration oxygen-enriched solution is sprayed out through the small holes of the diffuser, and the high-concentration oxygen-enriched solution is quickly dissolved with water. Because of the pressure drop, a small amount of oxygen bubbles escape from the high-concentration oxygen-enriched solution, so the small amount of oxygen bubbles and the high-concentration oxygen-enriched solution are ejected together to generate a strong vortex with water, and the fusion time is accelerated. Application test cases prove that the gas-water mixture or the mixed solution is converted into a supersaturated high-concentration oxygen-enriched solution (the concentration of dissolved oxygen reaches 5-10PPM, and the effective utilization rate of oxygen reaches more than 99%), the high-concentration oxygen-enriched solution and water are both liquid, the solution and the combination are completed instantly, and the dissolved oxygen content of the water body can be accurately and stably controlled. Compared with the mode of adding oxygen, the method has the advantages that additional stirring equipment is not needed, the oxygen utilization rate is high, and the use cost of a user is greatly reduced.
3) In the prior art, using the oxygen dosing method, an aerator or a venturi static mixer is a means for projecting gas (air) into the water, the gas and water being mixed at the convergent section or throat of the venturi nozzle and then ejected through the divergent section. The ejection speed of the solution is increased, the pressure is rapidly reduced, a large amount of oxygen is separated out from the solution to form large bubbles, and only a small part of oxygen is dissolved with water. Because of different pressures at different heights in water, oxygen bubbles escape from the water in open environments such as shallow pools, water pools and the like; oxygen bubbles can break in the pipeline, causing vibration and cavitation, and affecting the accuracy of the dissolved oxygen.
The diffuser has the main functions of stabilizing the pressure of the whole system to be more than 2bar by utilizing the small holes and/or the narrow gaps, always sealing oxygen in supersaturated high-concentration oxygen-enriched solution, and generating stable high-concentration oxygen-enriched solution and a small amount of oxygen bubbles when the pressure is released. A passage for releasing the high-concentration oxygen-enriched solution is formed in one half side wall of the diffuser, and the passage for releasing the high-concentration oxygen-enriched solution is a row or a plurality of rows of small holes, a row or a plurality of rows of narrow gaps, or a combination of the small holes and/or the narrow gaps; a plurality of channels for releasing the high-concentration oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels which release the high-concentration oxygen-enriched solution on the same horizontal plane are arranged in an acute-angle central included angle manner, so that the outlet pressure of the high-concentration oxygen-enriched solution is ensured to be more than 2bar, and the high-concentration oxygen-enriched solution is jetted and mixed with water to be treated. The inlet pressure and outlet pressure (ideal) of the pressurized mixture are made to coincide through the small holes and/or narrow slits and are injected into the water at a very rapid rate. Because the pressure drops, the pressure difference can cause partial oxygen to escape from the solution in the form of micro-bubbles, therefore, the mixed solution of high-concentration oxygen-enriched solution and micro-bubbles is sprayed together to be mixed with water, meanwhile, because the small holes and/or narrow slits on each row are positioned on the same vertical line and are uniformly arranged, the pressure difference between the porous side and the non-porous side of the diffuser, the pressure mixed solution forms vortex in the water, and the mixing is further accelerated.
In the utility model, the diffuser used for spraying the high-concentration oxygen-enriched solution is combined with the narrow gap and the small hole or is used independently, and the small hole or the combination of the narrow gap and the small hole is designed for a small-diameter pipeline below DN 25; the narrow gap or the combination of the narrow gap and the small hole is more suitable for a large-caliber pipeline which is larger than DN 25; the solution ejected through the narrow gap has a larger contact surface with water than if only small holes were used; depending on the use scenario, a combination of small holes and/or narrow slits may also be used. The liquid flows through the pores and is a contraction and re-diffusion process, the liquid state is turbulent flow, great pressure loss is generated, and more pores cause more oxygen to be separated out. The state when the liquid passes through a narrow gap and the pressure is below 10bar is laminar, in contrast to small pores, where the evolution of oxygen is much less than small pores. However, in some cases, a combination of small holes and narrow gaps is required, so that a small amount of oxygen is lost, a certain turbulent flow is formed, and the mixing effect with raw water is enhanced. Compared with the small hole, the narrow gap can also solve the problem that the small hole deforms due to cavitation erosion and influences the ejection flow and pressure of the solution when the system is used.
Compared with an aeration head, a Venturi or a Venturi static mixer in the prior art, the high-concentration oxygen-enriched solution diffuser solves the problems of low oxygen utilization rate (dissolution rate), noise, vibration, cavitation and the like; meanwhile, the application scene range of the high-concentration oxygen-enriched solution feeding is wider, and the method can be applied to natural lakes, shallow channels, shallow pools, pipelines, liquid storage tanks and the like.
4) The utility model solves the problem that oxygen is easy to separate out from liquid when gas and water with different pressures are mixed; the conversion of the gas-water mixture into a supersaturated oxygen-enriched solution requires pressure and time, and the design of the reaction tank solves these problems, and the high-concentration oxygen-enriched solution remains stable in a closed pressure environment.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a high concentration oxygen-rich solution feeding system in example 1 of the present invention;
FIG. 2 is a schematic diagram showing the overall structure of a high concentration oxygen-rich solution feeding system in example 2 of the present invention;
FIG. 3 is a sectional top view of the diffuser 6 of the present invention;
FIG. 4 is a front view of the diffuser 6 according to the present invention;
fig. 5 is a side view of the diffuser 6 of the present invention.
In the figure: 1. liquid oxygen storage tank 2, electronic vaporizer 4, water pump 5, reaction tank 6, diffuser 7, dissolved oxygen probe 8, narrow gap 9, aperture 10, pressure regulating valves 11, fused water pipeline 12, oxygen pipeline 13, oxygen injection switch 14, control valve 15, high concentration oxygen-enriched solution pipeline A, center included angle B, center included angle
Detailed Description
The utility model is further described below with reference to the following figures and examples.
Example 1
As shown in fig. 1, the high concentration oxygen-enriched solution adding system of the present embodiment includes a liquid oxygen storage tank 1, an electronic vaporizer 2, a reaction tank 5, and a diffuser 6, which are connected in sequence, and further includes a water pump 4 connected to a water inlet at the top of the reaction tank 5 through a mixed water pipeline 11; an oxygen pipeline 12 which is connected with the outlet of the electronic vaporizer 3 and the gas inlet on the top of the reaction tank 5 is provided with a pressure regulating valve group 10; a small section of each of the mixed water pipeline 11 and the oxygen pipeline 12 extends into the reaction tank 5; a water spray nozzle (connected with a mixed water pipeline 11) and an oxygen nozzle (connected with an oxygen pipeline 12) are arranged on the top of the inner tank of the reaction tank 5; the outlet at the bottom of the reaction tank 5 is connected with the inlet of the diffuser 6; a control valve 14 capable of accurately controlling the flow and the pressure is arranged on a high-concentration oxygen-enriched solution pipeline between an outlet at the bottom of the reaction tank 5 and an inlet of the diffuser 6; the diffuser 6 is arranged in the water pipe through which water flows to be treated, is positioned upstream of the water flow, and is inserted into the water pipe perpendicularly to the water flow direction; a plurality of channels for releasing the oxygen-enriched solution are formed in the side wall of one half of the diffuser 6, the channels for releasing the oxygen-enriched solution can generate backpressure of more than 3bar and enable the supersaturated oxygen-enriched solution to be sprayed into water to be treated (reversely sprayed into the water at the upstream of the water flow) at the outlet pressure of more than 3bar, and the pressure difference of more than 2bar is ensured between the outlet pressure of the diffuser and the pressure of the water to be treated; the downstream water outlet of the water pipeline where water flows to be treated is connected with the inlet of the water pump 4 through the mixed water pipeline 11 (the oxygen-enriched outlet water treated by the oxygen-enriched solution adding system and the adding process of the utility model is used as water for the water pump 4, namely mixed water). A dissolved oxygen probe 7 is arranged at the downstream of the water flow in the water pipeline, the dissolved oxygen probe 7 is connected with a signal receiver, and the signal receiver is connected with the input end of the PLC; the output of the PLC controller is connected to a control valve 14.
Oxygen gasified and heated to have a pressure of 2bar or more and pressurized water dissolved and mixed which is pressurized to a pressure of 2bar or more by a water pump 4 form a gas-water mixture at the top of a reaction tank 5; the gas-water mixture gradually forms a saturated high-concentration oxygen-enriched solution in the reaction tank 5; the saturated high-concentration oxygen-enriched solution passes through a control valve 14 which is arranged on a high-concentration oxygen-enriched solution pipeline 15 between the reaction tank 5 and the diffuser 6 and can accurately control the flow and the pressure to form a supersaturated high-concentration oxygen-enriched solution; the supersaturated high concentration oxygen enriched solution is back-injected into the water upstream of the water flow in the water inlet pipe through the passages on the diffuser 6 which release the high concentration oxygen enriched solution. The dissolved oxygen probe 7 transmits signals to the signal receiver in real time, and the signals received by the signal receiver are processed by the PLC and then control the opening size of the control valve 14 so as to control the input amount of the high-concentration oxygen-enriched solution, thereby achieving the dissolved oxygen amount which a user wants to control.
As shown in fig. 3-5, the diffuser 6 is a hollow long cylindrical object with one half of the cross section being a polygon and the other half being an arc, and one end of the hollow long cylindrical object is closed, and a plurality of channels for releasing the high-concentration oxygen-enriched solution are formed on the half of the side wall of the polygon of the diffuser 6; the channel for releasing the high-concentration oxygen-enriched solution is a combination of a small hole and a narrow gap, the middle of the channel is provided with a row of small holes 9, and two sides of the channel are respectively provided with a row of narrow gaps 8; two adjacent channels (small holes 9 and/or narrow slits 8) releasing the high-concentration oxygen-enriched solution on the same horizontal plane are arranged in an acute central included angle (that is, the central included angle formed by the connecting line of the two adjacent channels releasing the high-concentration oxygen-enriched solution and the central point is an acute angle, and as shown in A, B in fig. 3, the two central included angles are acute angles), so as to ensure that the outlet pressure of the high-concentration oxygen-enriched solution is greater than 2bar and the high-concentration oxygen-enriched solution is ejected to be mixed with the water to be treated.
As shown in fig. 5, a diffuser 6 is provided in the water conduit through which water flows to be treated, upstream of the water flow; the diffuser 6 is inserted into a water pipeline in a direction perpendicular to the water flow, one side of the diffuser 6 with the small holes 9 and the narrow gaps 8 is right opposite to the upstream of the water flow, so that high-concentration oxygen-enriched solution in the diffuser 6 can be reversely sprayed out from the small holes 9 and the narrow gaps 8 opposite to the water flow, and when the high-concentration oxygen-enriched solution is sprayed out to react with water in a mixing way, because the pressure of the other side is low, a vortex can be generated to further enhance the mixing effect.
The small holes 9 and the narrow slits 8 on the diffuser 6 can generate backpressure of more than 3bar and enable the high-concentration oxygen-enriched solution to be ejected from the small holes 9 and/or the slits 8 in a reverse direction to the water flow at the outlet pressure of more than 3bar and to be ejected into the water to be treated in the water pipeline, and the pressure difference between the outlet pressure of the diffuser 6 and the pressure of the water to be treated is ensured to be more than 2 bar.
The working principle of the oxygen-enriched solution adding system of the embodiment is as follows: the high-pressure low-temperature liquid oxygen is stored in the liquid oxygen storage tank 1; the liquid oxygen comes out from the bottom of the liquid oxygen storage tank 1 and is conveyed to the electronic vaporizer 2, and the liquid oxygen is converted into oxygen continuously and quantitatively; the pressure of the oxygen is adjusted to be more than 2bar through the pressure regulating valve group 10; oxygen at a pressure of 2bar or more is fed into the reaction tank 5 from the tank top (ejected from the oxygen nozzle) through the oxygen pipe 12, and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched effluent which is treated by the oxygen-enriched solution feeding system and the feeding process and then filtered to remove impurities) is pressurized to more than 2bar through a water pump 4, and then is sent into a reaction tank 5 from the top of the tank (entering from a water inlet at the top of the tank and sprayed out from a water mist nozzle) through a dissolved water pipeline 11 in a high-pressure mist shape, and the pressure in the tank is kept to be more than 2 bar; the volume ratio of oxygen with a pressure above 2bar to the dissolved water is not less than 1: 10; in the reaction tank 5, the oxygen is mixed with pressurized dissolved water mist to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the oxygen is large, and the oxygen is quickly dissolved in the water and generates a high-concentration oxygen-enriched solution in a set pressure environment; with the continuous feeding of oxygen, when the pressure in the reaction tank continuously reaches more than 2bar, the high-concentration oxygen-enriched solution in the tank is converted into saturated high-concentration oxygen-enriched solution; the saturated high-concentration oxygen-enriched solution is pumped to a control valve 14 capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank 5, the control valve 14 seals the saturated high-concentration oxygen-enriched solution between the reaction tank 5 and the control valve 14, and the saturated high-concentration oxygen-enriched solution becomes supersaturated high-concentration oxygen-enriched solution due to the continuous pressure in the reaction tank 5; the control valve 14 is opened, the supersaturated high-concentration oxygen-enriched solution passes through the valve core in the control valve 14, the supersaturated high-concentration oxygen-enriched solution is conveyed to the diffuser 6 through a pipeline, a mixed solution of the supersaturated high-concentration oxygen-enriched solution and a small amount of oxygen microbubbles is formed through a channel designed on the diffuser 6, namely the small hole 9 and/or the narrow gap 8, and is reversely sprayed into water at the upstream of water flow in a water pipeline, the high-concentration oxygen-enriched solution is rapidly mixed with the water, and when dissolved oxygen is fed (dissolved oxygen amount is increased), the small amount of oxygen microbubbles are absorbed by the water flow so as to achieve the purpose of increasing the dissolved oxygen. The dissolved oxygen probe 7 is arranged at the downstream of the water flow in the water pipeline and transmits a dissolved oxygen signal to the signal receiver on the control valve 14 in real time, and the signal received by the signal receiver is processed by the PLC to control the opening size of the control valve 14 so as to control the input amount of the high-concentration oxygen-enriched solution, thereby achieving the dissolved oxygen amount which a user wants to control.
A liquid level instrument (not marked in the figure) for outputting signals is arranged outside the tank body of the reaction tank 5, and the liquid level signals of the high-concentration oxygen-enriched solution in the tank control the water pump 4 and the switch 13 for injecting oxygen through the PLC processor. When the liquid level drops, the PLC processor controls the water pump 4 and the switch 13 for injecting oxygen to be opened, so as to generate high-concentration oxygen-enriched solution, and the high-concentration oxygen-enriched solution which is put into water and consumed by neutralization is supplemented.
The dissolved oxygen of raw water and water to be treated is unstable, and after the dissolved oxygen is added by adopting the dissolved oxygen adding system and the adding process, the dissolved oxygen can be increased and stabilized at the dissolved oxygen required by customers. The treated effluent which is stabilized at the dissolved oxygen amount required by a client and treated by adding the dissolved oxygen through the dissolved oxygen adding system and the adding process is used as water for a water pump, namely, the dissolved water. The dissolved oxygen amount of the water to be treated is unstable, the dissolved oxygen amount is stable after the dissolved oxygen is added, and the water with the stable dissolved oxygen amount contains the dissolved oxygen after the dissolved oxygen is added, so that the adding amount of the dissolved oxygen in the treatment process of the next batch of water to be treated can be reduced if the dissolved oxygen is contained in the water. This is a process of recycling dissolved oxygen.
Mixing oxygen with pressurized dissolved water under a certain pressure to form a gas-water mixture with pressure, and converting the gas-water mixture into a saturated high-concentration oxygen-enriched solution in a reaction tank 5; the saturated high-concentration oxygen-enriched solution is sealed between the reaction tank 5 and the control valve 14 to form a supersaturated high-concentration oxygen-enriched solution; the supersaturated high-concentration oxygen-enriched solution is fed into water through a diffuser 6 (shown in fig. 3-5) (the supersaturated high-concentration oxygen-enriched solution can reduce the generation of bubbles compared with the saturated high-concentration oxygen-enriched solution); since the pressure of the water is at a low pressure, in order to avoid the oxygen bubbles in the mixed liquid from escaping in a large amount in the pressure drop, the present invention designs the diffuser 6 (shown in fig. 3-5), and the function of the diffuser 6 is to stabilize the pressure of the system, maintain the back pressure of the system and inject the high concentration oxygen-enriched solution into the raw water. The supersaturated high-concentration oxygen-enriched solution is sprayed out through the small holes of the diffuser 6, and the high-concentration oxygen-enriched solution is rapidly dissolved with water. Because of the pressure drop, a small amount of oxygen bubbles escape from the high-concentration oxygen-enriched solution, so the small amount of oxygen bubbles and the high-concentration oxygen-enriched solution are ejected together to generate a strong vortex with water, the blending speed is accelerated, and the blending time is shortened. Application test cases prove that the gas-water mixture or the mixed solution is converted into a supersaturated high-concentration oxygen-enriched solution (the concentration of dissolved oxygen reaches 5-10PPM, and the effective utilization rate of oxygen reaches more than 99 percent), the high-concentration oxygen-enriched solution and water are both liquid, the solution and the combination are completed instantly, and the fluctuation of the dissolved oxygen amount can be accurately and stably controlled. Compared with the mode of adding oxygen, the method has the advantages that additional stirring equipment is not needed, the oxygen utilization rate is high, and the use cost of a user is greatly reduced.
The function of the diffuser 6: in addition to injecting the highly enriched oxygen solution into the water, the pressure of the whole system is maintained to prevent oxygen from escaping from the highly enriched oxygen solution. The small holes 9 and/or the narrow slits 8 on the diffuser 6 keep the back pressure of the system to be more than 2bar, the supersaturated high-concentration oxygen-enriched solution is reversely sprayed into the water to be treated through the small holes 9 and/or the narrow slits 8 on the diffuser 6, and the high-concentration oxygen-enriched solution can be quickly dissolved in the water while oxygen bubbles are absorbed by the water vortex, so that the purpose of controlling the dissolved oxygen amount is achieved. The system back pressure will maintain the whole conversion process and pipeline pressure, and can prevent oxygen bubbles from escaping from the high-concentration oxygen-enriched solution due to pressure drop, and prevent the high-concentration oxygen-enriched solution from returning to the gas-water mixture state.
The diffuser 6 is a hollow polygonal long cylindrical object with one closed end, and is inserted in a direction perpendicular to the water flow, one surface of the diffuser 6 with the small holes 9 and/or the narrow slits 8 is right opposite to the upstream of the water flow (see fig. 4), the top end of the diffuser 6 is opened (the end which is not closed), so that the supersaturated high-concentration oxygen-enriched solution can be allowed to enter, and the supersaturated high-concentration oxygen-enriched solution is sprayed out from the small holes 9 and/or the narrow slits 8 in a reverse direction opposite to the water flow and then is mixed with the water. The process that the solution enters the water is a depressurization process, in the process of pressure balance, the oxygen-enriched pressure solution and a small amount of oxygen bubbles form vortex with the upstream of the water flow and the downstream of the water flow at the moment of spraying through the small holes 9 and/or the narrow gaps 8, the small bubbles are absorbed by the water flow, the high-concentration oxygen-enriched solution reacts with the water, and the whole process is an intensified mixing and rapid dissolving mixing process.
In conclusion, the utility model provides a set of complete oxygen-enriched solution feeding system, the oxygen-enriched solution is fed by the system, the supersaturated high-concentration oxygen-enriched solution is generated by the pressure action of oxygen and the dissolved water in a tank, and the supersaturated high-concentration oxygen-enriched solution is fed into the water to be treated by a diffuser, so that the dissolved oxygen content of the water to be treated is adjusted.
In the prior art, an oxygen feeding mode is used, a venturi nozzle is a component for projecting gas into water, and the gas and the water are mixed at a contraction section or a throat of the venturi nozzle and then are ejected through an expansion section. The injection speed of the solution is increased, the pressure is rapidly reduced, a large amount of oxygen is separated out from the solution to form large bubbles, and only a small part of the oxygen reacts with water to generate dissolved oxygen solution. Because of different pressures at different heights in water, oxygen bubbles escape from the water in open environments such as shallow pools, water pools and the like; oxygen bubbles can break in the pipeline, causing vibration and cavitation, and affecting the control accuracy of the dissolved oxygen.
The main function of the diffuser 6 in the present invention is to stabilize the pressure of the whole system above 2bar by means of the small holes 9 and narrow slits 8 shown in fig. 3-5, to always seal oxygen in the supersaturated oxygen-enriched solution with high concentration, and to generate stable oxygen-enriched solution with small amount of oxygen bubbles when the pressure is released. As shown in fig. 3-5, a passage for releasing the high concentration oxygen-enriched solution is formed on one half of the side wall of the diffuser 6, and the passage for releasing the high concentration oxygen-enriched solution is a combination of a row of small holes 9 and a plurality of rows of narrow slits 8 (a combination of small holes and narrow slits); a plurality of channels for releasing the high-concentration oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels which release the high-concentration oxygen-enriched solution on the same horizontal plane are arranged in an acute-angle central included angle manner, so that the outlet pressure of the high-concentration oxygen-enriched solution is ensured to be more than 2bar, and the high-concentration oxygen-enriched solution is jetted and mixed with water to be treated. Through the small holes 9 and the narrow slits 8, the inlet pressure and the outlet pressure (ideal state) of the pressure mixed liquid (the mixed liquid of the high-concentration oxygen-enriched solution and the microbubbles having a certain pressure) are consistent, and the pressure mixed liquid is injected into the water at a very high speed. Because the pressure drops, the pressure difference can cause partial oxygen to escape from the solution in the form of micro-bubbles, therefore, the mixed solution of high-concentration oxygen-enriched solution and micro-bubbles is sprayed together to be mixed with water, meanwhile, because the small holes 9 or the narrow slits 8 on each row are positioned on the same vertical line and are uniformly arranged, the pressure difference exists between the porous side and the non-porous side of the diffuser 6, the pressure mixed solution forms vortex in the water, and the mixing is further accelerated.
Compared with a Venturi nozzle in the prior art, the high-concentration oxygen-enriched solution diffuser solves the problems of low oxygen utilization rate (dissolution rate), noise, vibration, cavitation and the like; meanwhile, the application scene range of the high-concentration oxygen-enriched solution feeding is wider, and the method can be applied to natural lakes, shallow channels, shallow pools, pipelines, liquid storage tanks and the like.
Example 2
The oxygen-rich solution adding system of the embodiment is basically the same as the oxygen-rich solution adding system in the embodiment 1; the difference lies in that:
the diffuser 6 is arranged in a pool to be treated without flowing water, and a plurality of channels for releasing the oxygen-enriched solution are arranged on the side walls of two sides of the diffuser 6; the channel for releasing the oxygen-enriched solution is a combination of a small hole and a narrow gap.
As shown in fig. 2, the diffuser 6 is arranged in a pool to be treated, which has no water flow, and a plurality of circles of small holes and narrow gaps (a row of small holes 9 and a row of narrow gaps 8 are staggered) are formed on the whole cylindrical side wall of the diffuser 6, so that 360-degree throwing is realized.
The channels (small holes 9 and narrow slits 8) for releasing the oxygen-enriched solution can generate a back pressure of more than 3bar and enable the supersaturated oxygen-enriched solution to be sprayed into the water to be treated in the water tank at an outlet pressure of more than 3bar, so that a pressure difference of more than 2bar is ensured between the outlet pressure of the diffuser and the pressure of the water to be treated.
The water outlet of the water pool without water flowing to be treated is connected with the inlet of the water pump 4 through a mixed water pipeline 11 (the oxygen-enriched water which is treated by the oxygen-enriched solution feeding system and the feeding process is used as the water for the water pump 4).
Example 3
The oxygen-rich solution adding system of the embodiment is basically the same as the oxygen-rich solution adding system in the embodiment 1; the difference lies in that: the high-concentration oxygen-enriched solution pipeline 15 is a large-pipe-diameter pipeline larger than DN25, the channel for releasing the high-concentration oxygen-enriched solution is a narrow gap, a row of narrow gaps 8 are arranged in the middle, and a row of narrow gaps 8 are respectively arranged on two sides.
Example 4
The oxygen-rich solution adding system of the embodiment is basically the same as the oxygen-rich solution adding system in the embodiment 1; the difference lies in that: the electronic vaporizer 2 is replaced by a fin heat exchanger; the high-concentration oxygen-enriched solution pipeline 15 is a small-diameter pipeline of DN25, the channel for releasing the oxygen-enriched solution is a combination of small holes and narrow gaps, the middle of the channel is provided with a row of narrow gaps 8, and two sides of the channel are respectively provided with a row of small holes 9.
Example 5
The small-sized high-concentration oxygen-enriched solution adding system of the embodiment is basically the same as the high-concentration oxygen-enriched solution adding system in the embodiment 1; the difference lies in that: the liquid oxygen storage tank 1 and the electronic vaporizer 2 are not arranged, and are replaced by a dewar tank or a steel cylinder. The pressure of oxygen is adjusted to be more than 2bar by a pressure regulating valve group 10 after the oxygen is discharged from a Dewar tank or a steel cylinder; oxygen at a pressure of 2bar or more is fed into the reaction tank 5 from the tank top through an oxygen pipe 12 and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched effluent which is treated by the oxygen-enriched solution adding system and the adding process and then filtered to remove impurities) is pressurized to more than 2bar by a water pump 4, and then is sent into a reaction tank 5 in a high-pressure mist form from the top of the tank by a dissolved water pipeline 11, and the pressure in the tank is kept to be more than 2 bar; in the reaction tank 5, the oxygen is mixed with the pressurized dissolved water mist to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the oxygen is large, and the oxygen is quickly dissolved in the water and reacts to generate a high-concentration oxygen-enriched solution in a set pressure environment; with the continuous feeding of oxygen, when the pressure in the reaction tank reaches more than 2bar, the high-concentration oxygen-enriched solution in the tank is converted into saturated high-concentration oxygen-enriched solution; the saturated high-concentration oxygen-enriched solution is pumped to a control valve 14 capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank 5, the control valve 14 seals the saturated high-concentration oxygen-enriched solution between the reaction tank 5 and the control valve 14, and the saturated high-concentration oxygen-enriched solution becomes supersaturated high-concentration oxygen-enriched solution due to the continuous pressure in the reaction tank 5; opening the control valve 14, wherein the supersaturated high-concentration oxygen-enriched solution passes through a valve core in the control valve 14, and the supersaturated high-concentration oxygen-enriched solution is conveyed to the diffuser 6 through a pipeline; the supersaturated high-concentration oxygen-enriched solution forms a mixed solution of the high-concentration oxygen-enriched solution and a small amount of oxygen microbubbles through small holes and/or narrow gaps in the diffuser 6, the mixed solution is reversely sprayed into water, the high-concentration oxygen-enriched solution is rapidly mixed with the water, and the small amount of oxygen microbubbles are absorbed by the water flow.
Claims (10)
1. An oxygen-enriched solution adding system is characterized by comprising a reaction tank, a diffuser, an oxygen pipeline and a mixed water pipeline; a water mist nozzle and an oxygen nozzle are arranged on the top of the tank in the reaction tank; a water pump is arranged on the mixed water pipeline; the outlet of the water pump is connected with the water inlet and the water mist nozzle on the top of the reaction tank through a mixed water pipeline; the oxygen pipeline is provided with a pressure regulating valve bank; the outlet of the pressure regulating valve group is connected with an oxygen inlet and an oxygen nozzle on the top of the reaction tank through an oxygen pipeline; an outlet at the bottom of the reaction tank is connected with an inlet of the diffuser through an oxygen-enriched solution pipeline; a control valve or a flow-limiting orifice plate or a throttling hole which can accurately control the flow and the pressure is arranged on an oxygen-enriched solution pipeline between an outlet at the bottom of the reaction tank and an inlet of the diffuser; the diffuser is arranged in the water to be treated; the diffuser is a hollow cylindrical object with one open end and the other closed end; a channel for releasing the oxygen-enriched solution is arranged on the cylindrical side wall of the diffuser; the channel for releasing the oxygen-enriched solution is a small hole or a narrow gap, or a combination of the small hole and the narrow gap; the channel for releasing the oxygen-enriched solution can generate a certain back pressure and enables the supersaturated oxygen-enriched solution to be sprayed into the water to be treated at a certain outlet pressure, so that the pressure difference of more than 2bar is ensured between the outlet pressure of the diffuser and the pressure of the water to be treated;
the diffuser is arranged in raw water or a water pipeline which flows by water to be treated and is positioned at the upstream of the water flow, and a passage for releasing the oxygen-enriched solution is arranged on one half side wall of the diffuser; the channels for releasing the oxygen-enriched solution are one or more, or one or more rows; the diffuser is inserted into the raw water or the water pipeline in a direction perpendicular to the water flow direction, one side of the diffuser, which is provided with a channel for releasing the oxygen-enriched solution, is right opposite to the upstream of the water flow, so that the oxygen-enriched solution in the diffuser can be reversely ejected from the channel for releasing the oxygen-enriched solution opposite to the water flow and can generate a vortex reinforced mixing effect;
alternatively, the diffuser is placed in a basin, pond or tank to be treated, where no water flows, on both side walls or on the entire cylindrical side wall of the diffuser, there are opened a plurality or more rows of channels releasing the oxygen-enriched solution.
2. An oxygen-enriched solution dosing system as claimed in claim 1, wherein said channel for releasing the oxygen-enriched solution is capable of generating a back pressure above 3bar and injecting the supersaturated carbonic acid solution into the water to be treated at an outlet pressure greater than 3 bar; the diffuser backpressure was greater than 3bar and maintained the pressure of the entire system at greater than 3 bar.
3. An oxygen-enriched solution adding system as claimed in claim 1 or 2, wherein the inlet of the merged water pipe is connected to the oxygen-enriched water outlet of the water to be treated which is treated by adding the oxygen-enriched solution.
4. An oxygen-enriched solution dosing system as claimed in claim 1 or 2, further comprising a liquid oxygen storage tank, an electronic vaporizer or a finned heat exchanger sequentially connected to the inlet of the oxygen pipeline, or further comprising a dewar or a cylinder connected to the inlet of the oxygen pipeline; and a pressure regulating valve group is arranged on an oxygen pipeline connected with an oxygen inlet at the top of the reaction tank at the outlet of the electronic vaporizer or the fin heat exchanger or the outlet of the dewar tank or the steel cylinder.
5. An oxygen-enriched solution adding system as claimed in claim 1 or 2, wherein a water quality on-line detector is arranged at the downstream of the water flow in the raw water or water pipeline or at the water outlet of the pool, the pond or the sewage tank, the water quality on-line detector is connected with a signal receiver, and the signal receiver is connected with the input end of the PLC controller; the output end of the PLC is connected with the control valve.
6. An oxygen-enriched solution dosing system as claimed in claim 1 or 2, wherein the diffuser is a hollow long cylindrical object with one half of the cross section being a polygon and the other half being an arc, and one end of the hollow long cylindrical object is closed, and a plurality of channels for releasing the high-concentration oxygen-enriched solution are formed on the side wall of one half of the polygon side of the diffuser; the channel for releasing the high-concentration oxygen-enriched solution is one or more rows of small holes, one or more rows of narrow gaps, or a combination of one or more rows of small holes and one or more rows of narrow gaps; or one or more apertures, one or more narrow slits, or a combination of one or more apertures and one or more narrow slits; the diffuser is inserted into the raw water in a direction perpendicular to the water flow, and the side of the diffuser with the small holes and/or the narrow gaps is opposite to the upstream of the water flow, so that the high-concentration oxygen-enriched solution in the diffuser can be reversely sprayed out of the water flow from the small holes and/or the narrow gaps.
7. An oxygen-enriched solution dosing system as claimed in claim 6 wherein the orifices and/or slots in each row are located in the same vertical line and are evenly spaced.
8. An oxygen-enriched solution dosing system as claimed in claim 1 or 2, wherein a plurality of channels releasing the high concentration oxygen-enriched solution on the same horizontal plane are uniformly arranged with a central included angle of less than 180 °; two adjacent channels which release the high-concentration oxygen-enriched solution on the same horizontal plane are arranged in an acute-angle central included angle.
9. An oxygen-enriched solution dosing system as claimed in claim 5, wherein the water quality on-line detector is an on-line dissolved oxygen measuring sensor or an on-line dissolved oxygen detector.
10. An oxygen-enriched solution adding system as claimed in claim 1 or 2, wherein a cooling liquid coil is provided in the reaction tank, or a supplementary cooling water pipe for supplementing cooling water is provided at the lower middle part of the reaction tank; the water mist nozzle on the top of the reaction tank is an industrial acoustic nano-scale atomizer.
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| CN113856505A (en) * | 2021-10-14 | 2021-12-31 | 哈维(上海)环境科技有限公司 | Method for feeding high-concentration oxygen-enriched solution by adopting oxygen-enriched solution feeding system |
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| CN113856505A (en) * | 2021-10-14 | 2021-12-31 | 哈维(上海)环境科技有限公司 | Method for feeding high-concentration oxygen-enriched solution by adopting oxygen-enriched solution feeding system |
| CN113856505B (en) * | 2021-10-14 | 2024-07-23 | 哈维(上海)环境科技有限公司 | Method for adding high-concentration oxygen-enriched solution by adopting oxygen-enriched solution adding system |
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