KR100781179B1 - Apparatus for concentrating - Google Patents

Abstract

The present invention preheats the waste water or chemical solution from which sediment and suspended solids are removed from the sedimentation tank with a heat exchanger, is reheated in a heating furnace, separated into a gas and a concentrate, and the gas and the concentrate are collected by vacuum adsorption using a motor and an ejector. The concentrated steam is reused as a heat source of the heat exchanger, and the wastewater concentrate from which the steam is separated is reduced in throughput, so that the post-treatment is easy, and the concentration of low concentration chemical solution is easy to control the concentration so that a high concentration of chemical solution can be obtained. It is about.

The present invention is a sedimentation tank for precipitating the suspended matter contained in the wastewater and preliminarily purifying it into pre-treatment wastewater, a stirring vessel for mixing with the driving force of the motor, a preheating heat exchanger, a heating furnace for heating with electricity, and separating into a concentrate and a gas A first reservoir having an evaporation tank, a condenser having a first motor and a first ejector, condensing water vapor into distilled water, a first air vent on the upper side, and storing distilled water and residual gas; And a second reservoir having an ejector, a second air vent for adsorbing residual gas, and storing a concentrated liquid, wherein the distilled water of the first reservoir is transferred to a heat exchanger by a circulation pump to supply a heat source. Provide a thickener.

Thickener

Description

Thickener {Apparatus for concentrating}

1 is a schematic view of the concentration device of the present invention,

2 is a side cross-sectional view of the heater of the present invention,

Figure 3 is a side cross-sectional view of the ejector of the present invention.

<Brief description of the main parts of the drawing>

100: sedimentation tank 110: outlet

120: discharge valve 200: stirring tank

210: motor 300: heat exchanger

400: heating furnace 410: generator

420: heat pipe 421: heating wire

422 glass tube 430 heat transfer member

440: wire 500: evaporator

510: upper exit 520: lower exit

530: pressure gauge 600: first reservoir

610: first ejector 620: condenser

630: the first air vent 640: circulation pump

650: first motor 700: second reservoir

710: second ejector 720: second air vent

730: second motor

The present invention relates to a concentrator, and more particularly, to pre-heat waste water or a chemical solution from which sediments and suspended solids are removed from a sedimentation tank with a heat exchanger, and reheat with electricity to separate the gas and the concentrate into a gas and the concentrate, using two ejectors. It is collected by vacuum adsorption separately, and the collected steam is reused as a heat source of the heat exchanger, and a very small amount of wastewater concentrate is easy to post-treatment, and a concentration device characterized in that a high concentration of chemical solution can be obtained.

In general, a large amount of wastewater generated in factories, landfills, etc. is first treated in a separator and discharged into concentrated water. By further heating it, water is evaporated and concentrated into solids to be discharged to the outside. Environmental equipment such as a concentrator has been used, and the concentrated wastewater is incinerated or dried and dried in a cake state after drying.

According to the Republic of Korea Patent No. 10-0454856-0000, in the direct heat type wastewater evaporation condenser having an evaporation concentration tank, a hot air supply unit, and a hot air guide mechanism, the hot air supply unit is for heating the air of high pressure supplied from the outside A hot air guide pipe installed in a combustion chamber, a lower portion of the combustion chamber and injecting hot air heated through the combustion chamber into the waste water, an outer pipe surrounding the hot air guide pipe and extending into an evaporative concentration tank, and the hot air The direct heating wastewater evaporation concentrator is provided in the space between the guide pipe and the outer pipe, and includes an injection nozzle for cooling the hot air guide pipe by spraying the wastewater pumped from the evaporation tank to the hot air guide pipe. The above method does not include a pretreatment process, so that the solid contained in the waste water Or the treatment efficiency of the wastewater was reduced by a suspension, and does not occur the re-use of the separated steam in the waste water were not saving the consumption of the heat source for heating the waste water, there is a problem in that the overall processing efficiency is reduced.

In addition, Korean Patent Registration No. 10-0298225 has an evaporation concentration tank provided with a burner for providing a heat source and a separator plate partitioning a combustion chamber heated as a heat source of the burner and a concentrated chamber supplied with concentrated water, wherein the exhaust chamber is discharged to the outside. Equipped with a stack to discharge the evaporation concentrated portion for evaporating the water of the concentrated water and a plurality of cylinder members for reciprocating a plurality of scrapers in contact with the bottom surface of the separation plate and the inner surface of the concentration chamber, both sides of the separation plate It has a conveyor that the scale removed by the scraper falls and a screw rotated by the motor member to transfer the scale to the discharge port side, the removal unit for discharging the scale to the outside and the seed for storing the seed agent introduced into the concentration chamber Equipped with a tank and received the measured value of the seed Although there has been provided a direct-type evaporation concentrator including a seed part having a metering controller for controlling the input amount, the above invention also does not include a pretreatment process, the adjustment of the boiling point of the waste water is not made, the overall treatment efficiency is reduced In addition to the effect of minimizing the amount of waste water discharged by simply concentrating the waste water, there was a problem that the additional function is not made to high concentration of low concentration chemical solution was limited to some uses.

The present invention has been made to solve the above problems, by providing a pre-treatment process to facilitate the circulation of the waste water to increase the overall efficiency of waste water treatment and the water vapor separated in the process of condensing waste water or chemical solution heat exchanger Energy savings can be expected by reusing energy lost by acting as a heat source and minimizing the consumption of fuel consumed in the concentration process of heating and concentrating waste water or chemical solution by preheating waste water or chemical solution by the heat exchanger. In the process of adsorption of gases and concentrates, vacuum adsorption is performed by using a motor and an ejector without using a vacuum pump to minimize the amount of power consumed during vacuum adsorption, and energy consumption is expected to be low. High concentration due to easy control of concentration of ingredients Kill number, and to provide a concentrator that allows a post-processing can be easily discharged by a large amount of waste water in a very small amount of high-concentration sludge to the purpose.

The present invention for achieving the above object, the sedimentation tank for precipitating the suspended matter contained in the waste water to be purified into pre-treatment waste water, a stirring tank for mixing by the driving force of the motor, a heat exchanger for preheating, a heating furnace for heating with electricity and A first reservoir having a first motor and a first ejector, a condenser for condensing water vapor into distilled water, a first air vent on the upper side, and storing distilled water and residual gas; And a second reservoir having a second motor and a second ejector and having a second air vent for adsorbing residual gas, and storing a concentrated liquid, wherein the distilled water of the first reservoir is transferred to a heat exchanger by a circulation pump to a heat source. It provides a concentrating device, characterized in that for supplying.

In addition, the heating furnace is characterized in that to form a plurality of heating tubes having a heating wire in the glass tube inside, and to generate heat by energizing the heating wire.

Hereinafter, the configuration and effect of the present invention concentration apparatus according to the accompanying drawings in more detail.

1 is a schematic view of the concentrating device of the present invention, FIG. 2 is a side cross-sectional view of the heater of the present invention, and FIG. 3 is a side cross-sectional view of the ejector of the present invention.

As shown in FIG. 1, the concentrating device of the present invention stores wastewater introduced from the outside, precipitates suspended matter contained in the wastewater, and is first purified with pretreatment wastewater, and forms an outlet 110 and a discharge valve 120 at a lower end thereof. The settling tank 100 for discharging the suspended solids to the outside, the stirring tank 200 for mixing the pre-treatment waste water connected to the settling tank 100 to remove the suspended solids by the driving force of the motor 210, and the stirring tank ( A heat exchanger 300 for preheating the mixed pretreatment wastewater connected to the 200, a heating furnace 400 for heating the pretreatment wastewater preheated by the heat exchanger 300 with the power generator 410 and the heating wire 421; The evaporation tank 500 receives the waste water from which the heating is completed, and separates the concentrated liquid into a gas, and a first motor 650 and a first ejector 610 which vacuum-adsorb the gas of the evaporation tank 500. And distilled water into the water vapor contained in the gas. The storage has a condenser 620, a first air vent 630 for adsorbing the residual gas on the upper side, the first reservoir 600 connected to the upper end of the evaporation tank 500 to store the distilled water and residual gas ), A circulating pump 640 which transfers the distilled water of the first storage tank 600 to the heat exchanger 300 and is supplied as a heat source, and a second motor 730 that vacuum-adsorbs the concentrated liquid of the evaporation tank 500. And a second air vent 720 for adsorbing residual gas on the upper side, and connected to a lower end of the evaporation tank 500 to store the concentrated liquid. It consists of.

The settling tank 100 is provided with a predetermined space therein to store the wastewater introduced from the outside for a predetermined time, while precipitating the suspended matter contained in the wastewater while storing it separated into sludge and pre-treatment wastewater to be purified first to concentrate the process This is to prevent the wastewater from being reduced in circulation due to sludge during the process, and the treatment efficiency of the wastewater is reduced. The discharge port 110 is formed at the bottom to discharge the suspended matter to the outside, and is opened and closed by the discharge valve 120. The sludge discharged from the sedimentation tank 100 may be discharged through a separate aftertreatment process such as solidification and landfilling.

The sedimentation tank 100 is installed in the sedimentation basin having an inlet on one side and the storage guide wall to form a storage guide space between the bottom of the sedimentation basin, and install the inclined plate between the reservoir guide wall and the end wall of the sedimentation basin Using a precipitation device to discharge the pretreatment wastewater by installing a supernatant water outlet formed with a top inlet hole on the top of the inclined plate, or a coagulation / sedimentation tank forming the outer body of the device, a raw water inflow pipe for introducing raw water, and for removing sediment materials It is preferable to use a conventional sedimentation apparatus, such as a sedimentation conduit consisting of a sediment outlet tube and a treated water outlet tube for the sewage separated from the sediment to proceed to the next process.

In addition, the sedimentation tank 100 is a pretreatment process for wastewater containing a large amount of suspended solids, and wastewater that does not contain a chemical solution or suspended solids may be omitted when it is desired to concentrate a relatively low contaminant solution.

Stirring tank 200 is connected to the settling tank 100 is transported by a pump or provided at a lower position than the settling tank 100 so that the pretreatment waste water to remove the suspended matter by its own pressure and drive power of the motor 210 The reason for mixing the pretreated waste water uniformly is to speed up the treatment speed of the waste water by transferring it to a uniform concentration during heating or conveying to facilitate circulation.

The stirring vessel 200 uses a rotating mechanism for rotating the stirring vessel and a stirring apparatus installed on the rotating shaft, or by installing a separate propeller inside the stirring vessel to rotate the propeller by driving the motor, according to the rotation of the propeller Turbulence is formed so that the internal pretreatment waste water is mixed at the same concentration, and the stirring process may be omitted in the process of concentrating the homogeneous mixture or the chemical solution, since the homogeneous mixture or the chemical solution has a uniform concentration. have.

The heat exchanger 300 is a device for preheating the pretreatment waste water mixed with the stirring vessel 200 and has a predetermined space therein and forms a plurality of pipes passing through the heat exchanger 300 in the space. The pretreatment wastewater passes through the pipe and the preheating of the pretreatment wastewater circulated inside the pipe with hot water to be preheated by the hot water, and in the case of chemical solution, flows directly into the heat exchanger 300 without a separate pretreatment process. The pipe may be made of quartz, tempered glass, or the like, which is less reactive or chemically resistant to a chemical solution.

A heat exchanger is a device that transfers heat from a high temperature fluid to a low temperature fluid through a heat transfer wall, and is used in a heater, a cooler, an evaporator, a condenser, and a heat exchanger. It is supplied with fruit, and the metal tube is used as heat transfer wall, and this type includes main type, double tube type, multi-pin type tube type and bushing type. In other words, the flow of high fluid and low fluid flows in the same direction.

Although the type of heat exchanger 300 used in the present invention uses a heat exchanger within the above range, it is a matter of course that a new type of heat exchanger having a high efficiency developed later may be used.

Heating furnace 400 is a device for heating the pre-treatment waste water preheated by the heat exchanger 300 to the heat transfer pipe 420, the pre-treatment waste water heated by the heat source is a vapor or other chemical solution with a low boiling point is heated by vaporization It is in the gaseous state at the top of the furnace and the remaining components are concentrated and in the liquid state.

As shown in FIG. 2, the heating furnace 400 has a plurality of heat pipes 420 having the heating wires 421 inside the glass tube 422, and the heating wires 421 are provided with the heating elements 430. In this way, the electrical energy obtained by energizing by the action of the heat transfer member 430 is converted to thermal energy to generate heat, and the glass tube 422 is made of quartz or tempered glass, which is less reactive or chemically resistant to chemical solutions. In order to heat the waste water with less chemical resistance, a material commonly used may be used. The heating wire 421 is a resistance wire for heating at high temperature by using a heat-generating action by electric current. Easy conductor materials are used, alloys of iron and chromium, alloys of nickel and chromium are used, and materials with high thermal conductivity are selected and used.

In addition, a heating device such as waste water, which is not a chemical solution, can supply heat energy to a heating furnace through various heating methods such as heating the furnace by supplying a heat source to the heating furnace by placing a combustion chamber outside. In the present invention, the heating method using the heat transfer tube 420 as described above is recommended.

The evaporation tank 500 receives and stores the waste water or chemical solution heated in the heating furnace 400 to separate the gas and the concentrate, and on one side, a pressure gauge 530 capable of measuring the internal pressure of the evaporation tank 500. Using a pressure vessel, characterized in that to comply with the recommended pressure of the pressure vessel through the pressure measurement, to form the upper outlet 510 at the top, and to form the lower outlet 520 at the bottom, The pressure vessel is sealed and mounted so that the upper cap forms a through hole at the upper side of the main body to form a cylindrical shape by processing a metal member, and is sealed to maintain the air tightness, and the lower cap is formed to maintain the air tightness at the bottom of the main body. Use a pressure vessel fitted to prevent spillage of the contents.

In addition, the present invention forms a separate evaporation tank (500) to transfer the pre-treatment waste water heated in the heating furnace 400 to the evaporation tank (500) for vacuum adsorption, but in some cases without the evaporation tank 500 separately In the heating furnace 400, a heating process and a vacuum adsorption process may be performed at the same time.

The first reservoir 600 is a first motor 650 for providing a rotational force to vacuum suction the gas of the evaporator 500 and a first ejector 610 for circulating distilled water pumped to the first motor 650 And a condenser 620 for condensing the water vapor contained in the gas into distilled water, and having a first air vent 630 for adsorbing the residual gas from which the water vapor has been removed. It is connected to the upper end to adsorb water vapor and gas, and forms a predetermined space therein to store distilled water and residual gas from which water vapor is condensed or liquefied.

As shown in FIG. 3, the first ejector 610 has an inlet 10 and an outlet 20 of a fluid having a hollow shape at both ends thereof, and between the inlet 10 and the outlet 20. A central portion 30 having a diameter smaller than the inlet 10 and the outlet 20, and having an inlet 40 for suctioning working fluid into the ejector in the central portion 30 and adjacent to the inlet 40. The concave inlet groove 50 is formed in the central portion 30, the inlet 10 is connected to the upper side of the first reservoir 600, and the outlet 20 is connected to the first motor 650. Inlet 40 is connected to the upper outlet 510 of the evaporation tank 500, the first ejector 610 when the distilled water exits from the first reservoir 600 by the driving of the first motor 650 and rapidly circulates Inlet 40 of the) is a relatively low pressure state through the upper outlet 510 of the distillation tank 500 is connected to the inlet 40 Seuna water vapor is sucked into the suction port 40 of the first ejector (610) is transferred to a first reservoir (600).

The ejector is a device for ejecting or condensing the surrounding steam or water by injecting a pressurized steam, air, or water from the nozzle, and is used to discharge the air mixed in the condenser with one of the fractionation pumps. The steam ejector using the as a driving fluid is widely used, and since there is no moving part, the structure is simple and the volume and weight are small.

The first motor 650 is a main part of a pump, a blower, or a compressor, and is equipped with an impeller rotating with dozens of wings arranged at equal intervals on the circumference, and transferring the circulating fluid. By forcibly increasing the speed acts as a centrifugal pump to increase the suction force of the first ejector 610 according to the rotational force of the first motor 650.

Centrifugal pumps use the centrifugal force generated by rotating one or several impellers in a closed casing to pump the liquid, ie, to transport or pressure the liquid, The central part is a pressure drop, which is close to the vacuum, and the water in the absorption pipe flows toward the center of the impeller under atmospheric pressure. It is capable of high speed rotation, small size, light weight, simple structure, easy handling, high efficiency and pulsation. It has less features and can use a centrifugal pump instead of the first motor 650.

As described above, the first ejector 610 is connected to the first motor 650 to circulate water vapor by the driving of the first motor 650 and to reduce the pipe connected to the first reservoir 600 to reduce the evaporation tank ( 500) It is forcibly adsorbing gas including water vapor inside.

When the condenser 620 transfers the water vapor and the gas adsorbed by the evaporation tank 500 to the first storage tank 600, the condenser 620 condenses the water vapor and transfers it to distilled water. As the liquefaction proceeds by itself, the operation and installation of the condenser can be selectively performed depending on the conditions and environment.

In addition, the condenser 620 is a device for cooling and condensing steam, also called a condenser, and particularly condensing water vapor is called a condenser. Condensers for chemical experiments are called chillers, and the simplest ones are the Liebig chillers, which let steam pass through one glass tube and cool it by pouring water into the outer tube surrounding it. In chemical plants, there are condensers in distillation towers, distillation pots, etc., surface capacitors which indirectly heat exchange through metal pipes, and mixed capacitors which are condensed by direct contact, can be selected and provided according to the type of working fluid to be concentrated.

The first air vent 630 is connected to the upper portion of the first reservoir 600 to collect steam or residual gas that is not condensed into distilled water in the first reservoir 600, and the collected residual gas is Since it is a constituent of waste water or contains a chemical solution component, it is transferred to a gas state or condensed into a concentrated liquid and is transferred to a second storage tank 700 in which the concentrated liquid is stored.

The first air vent 630 may have a conventional structure, and may have a predetermined space and allow residual gas to rise out of the first reservoir 600, or may be provided with a separate adsorber to force adsorption. And, the residual gas after the adsorption is completed to form a separator so as not to be mixed with distilled water.

In addition, the distilled water of the first reservoir 600 is transferred to the heat exchanger 300 by the circulation pump 640 to supply a heat source.

The water vapor separated by the first reservoir 600 is liquefied into distilled water but maintains a high temperature due to the characteristic of water having a boiling point of 100 ° C., and is driven by the circulation pump 640 to reuse the generated heat. The heat transfer to the heat exchanger 300 serves as a heat source for preheating the pre-processed waste water or chemical solution flowing into the pipe and the pipe passing inside the heat exchanger 300, the amount of hot water in the heat exchanger 300 internal space is saturated When it reaches to the outside through the discharge port, the cold water is discharged first, and the discharged water can be reused as industrial water such as washing water or cooling water.

The second reservoir 700 includes a second motor 730 and a second ejector 710 for vacuum adsorption of the concentrated liquid of the evaporation tank 500, and a second air vent 620 for adsorbing residual gas to the upper side. It is provided with, is connected to the bottom of the evaporation tank 500 to store the concentrate.

The second ejector 710 is connected to the second motor 730 to evaporate on the same principle as the first ejector 610 to apply a pressure to the evaporator 500 by the rotational force of the second motor 730. The concentrated liquid in the tank 500 is forcibly adsorbed.

In addition, the second ejector 710, like the first ejector 610, forms an inlet 10 and an outlet 20 of the fluid in a hollow shape in which both ends are open, and the inlet 10 and the outlet 20. And a central portion 30 having a diameter smaller than that of the inlet 10 and the outlet 20, and a suction port 40 for sucking the working fluid into the second ejector 710 in the central portion 30. The inlet groove 50 is formed in the region of the central portion 30 adjacent to the inlet 40, wherein the inlet 10 is connected to the second reservoir 700, and the outlet 20 is the second motor 730. When the inlet 40 is connected to the lower outlet 520 of the evaporation tank 500, the concentrated liquid is discharged from the second reservoir 700 by the driving of the second motor 730, and circulated rapidly Inlet 40 is a relatively low pressure state through the lower outlet 520 of the distillation tank 500 is connected to the suction port 40, such as gas or steam The removed concentrated liquid is sucked into the suction port 40 of the second ejector 710 and is transferred to the second reservoir along the transfer pipe to be stored.

The second motor 730, like the first motor 650, is a main part of a pump, a blower, or a compressor, and has an impeller rotating with dozens of wings arranged at equal intervals on the circumference. By mounting, acts like a centrifugal pump forcibly increasing the conveying speed of the circulating fluid to increase the suction force of the second ejector 710 according to the rotational force of the second motor (730).

As described above, the second ejector 710 is an ejector using a venturi tube, and has an ejection object suction port for suctioning an ejection object to a throat where vacuum is generated when air flows, and the suction port and the lower end of the evaporation tank 500. It is connected to the lower outlet 520 provided in to suck the concentrate.

In addition, when the concentrate is transferred to the second storage tank 700, the residual gas discharged from the first air vent 630 is collected and transferred together, and the dissolved gas is present as a liquid chemical solution, and the concentrate is made of 2 is delivered to the user through a drain provided on one side of the storage tank 700, and in the case of waste water solidified by landfill or post-treatment such as additionally equipped with a dehydration device, and in the case of chemical solution connected to the collection container Collect and use.

The second air vent 720 has the same configuration as the first air vent 630 and absorbs or collects residual gas separated from the concentrated liquid in the second storage tank 700 to be discharged to the outside. In case of harmful gases, a separate purification process is additionally performed to release to the atmosphere.

The present invention having the configuration as described above is provided with a pre-treatment process to facilitate the circulation of waste water to increase the overall efficiency of waste water treatment, steam separated from the waste water or the concentration of chemical solution heat source of the heat exchanger (300) By reusing the energy lost by the operation, preheating by the heat exchanger 300 can be saved to save the consumption of fuel consumed in the furnace 400, do not use a vacuum pump in the adsorption process of gas and concentrate The vacuum ejection is provided with the ejector to minimize the amount of power consumed during the vacuum adsorption, thereby saving energy and obtaining a very small amount of waste water or a high concentration chemical solution.

The present invention is not limited to the specific embodiments described above, and those skilled in the art to which the present invention pertains may be variously modified and practiced without departing from the gist of the present invention claimed in the claims, and Such changes are within the scope of the claims.

The concentrating device of the present invention is equipped with a pretreatment process to smoothly circulate wastewater, thereby increasing the overall efficiency of wastewater treatment, and the water vapor separated during the concentration of wastewater or chemical solution acts as a heat source of the heat exchanger. It can be expected to save energy by reusing, preheating waste water or chemical solution by the heat exchanger can minimize the consumption of fuel consumed in the concentration process of heating and concentrating waste water or chemical solution, adsorption of gas and concentrate In the process, it is possible to expect energy saving by minimizing the amount of power consumed during vacuum adsorption by carrying out vacuum adsorption with an ejector without using a vacuum pump, and easily adjusting the concentration of low concentration chemical components. Very large amounts of wastewater By discharging into a separate sludge is a useful invention to allow the post-treatment easier.

Claims (2)

A sedimentation tank (100) for storing the wastewater introduced from the outside and precipitating the suspended matter contained in the wastewater to preliminarily purifying it as pretreatment wastewater and forming an outlet (110) at the bottom to discharge the suspended matter to the outside; A stirring tank 200 connected to the settling tank 100 to mix the pre-treated waste water from which the suspended matter is removed by the driving force of the motor 210 to uniform the concentration; A heat exchanger (300) connected to the stirring vessel (200) to preheat the mixed pretreatment waste water; A heating furnace 400 for reheating the pretreated waste water preheated by the heat exchanger 300; An evaporation tank 500 for introducing pretreated waste water heated in the heating furnace 400 to separate the concentrate and a gas; A first ejector 610 connected to the first motor 650 to vacuum adsorb the gas in the evaporation tank 500, and a condenser 620 for condensing water vapor contained in the gas into distilled water. A first storage tank 600 having a first air vent 630 for adsorbing residual gas and connected to an upper end of the evaporation tank 400 to store distilled water and residual gas; A second ejector 710 connected to a second motor 730 to vacuum-adsorb the concentrated liquid of the evaporation tank 500, a second air vent 720 configured to adsorb residual gas on the upper side, and evaporate It is connected to the lower end of the tank 500 is configured as a second storage tank 700 for storing the concentrate, the distilled water of the first storage tank 600 is transferred to the heat exchanger 300 by the circulation pump 640 is a heat source Concentrator, characterized in that for supplying. The concentrating device according to claim 1, wherein the heating furnace has a plurality of heating tubes having heating elements in the glass tube, and heats the heating elements by energizing the heating lines.

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