CN114772554A - Chlorine dioxide production device for water disinfection - Google Patents
Chlorine dioxide production device for water disinfection Download PDFInfo
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- CN114772554A CN114772554A CN202210381297.5A CN202210381297A CN114772554A CN 114772554 A CN114772554 A CN 114772554A CN 202210381297 A CN202210381297 A CN 202210381297A CN 114772554 A CN114772554 A CN 114772554A
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- hydrochloric acid
- sodium chlorite
- chlorine dioxide
- metering pump
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- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 48
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 48
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 140
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000007788 liquid Substances 0.000 claims abstract description 71
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims abstract description 69
- 229960002218 sodium chlorite Drugs 0.000 claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 claims abstract description 58
- 239000007864 aqueous solution Substances 0.000 claims abstract description 52
- 239000000645 desinfectant Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims description 16
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims 2
- 239000000463 material Substances 0.000 description 5
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- -1 chlorate ions Chemical class 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010043275 Teratogenicity Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000007886 mutagenicity Effects 0.000 description 1
- 231100000299 mutagenicity Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000211 teratogenicity Toxicity 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/02—Oxides of chlorine
- C01B11/022—Chlorine dioxide (ClO2)
- C01B11/023—Preparation from chlorites or chlorates
- C01B11/024—Preparation from chlorites or chlorates from chlorites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a chlorine dioxide production device for water body disinfection, which comprises a sodium chlorite aqueous solution adding unit, a hydrochloric acid adding unit, a reaction kettle and a control device, wherein the sodium chlorite aqueous solution adding unit and the hydrochloric acid adding unit respectively comprise a raw material barrel, a connecting pipeline and a metering pump, the metering pump sucks raw materials in the raw material barrel of the adding unit through the connecting pipeline and adds the raw materials into the reaction kettle, the two adding units adopt raw material barrels with the same shape and specification, and the initial liquid level values of a sodium chlorite aqueous solution and hydrochloric acid are the same; the sodium chlorite aqueous solution and the hydrochloric acid are added according to the preset volume ratio of 1: 1, and chlorine dioxide generated by reaction in the reaction kettle and reaction residual liquid are added into a water body to be disinfected in real time in the form of a disinfectant. The invention has simple structure, reliable work and low requirement on working conditions, and creates conditions for applying chlorine dioxide to water disinfection in small-sized water use occasions.
Description
Technical Field
The invention relates to a chlorine dioxide production device for water body disinfection.
Background
Liquid chlorine has been widely used in water supply disinfection processes, but chlorine disinfection generates Trihalomethanes (THMs), haloacetic acids (HAAS) and other "causing" substances (cancer, teratogenicity and mutagenicity), and thus people start to disinfect water supply by replacing liquid chlorine with chlorine dioxide. However, since chlorine dioxide is unstable, highly corrosive, and difficult to store and transport, the development of equipment that can be prepared on site for use is a prerequisite for the disinfection of water bodies that are continuously supplied with water using chlorine dioxide.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a chlorine dioxide production device for water disinfection, which is suitable for small-sized continuous water supply occasions.
In order to achieve the purpose, the chlorine dioxide production device for water body disinfection comprises a sodium chlorite aqueous solution adding unit, a hydrochloric acid adding unit, a reaction kettle and a control device, wherein the sodium chlorite aqueous solution adding unit and the hydrochloric acid adding unit respectively comprise a raw material barrel, a connecting pipeline and a metering pump, the metering pump sucks raw materials in the raw material barrel of the adding unit through the connecting pipeline and adds the raw materials into the reaction kettle, the two adding units adopt raw material barrels with the same shape and specification, and the initial liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid are the same; the raw material barrel is of a closed structure, a liquid level meter and a one-way air inlet valve are arranged on the raw material barrel, the liquid level meter is used for detecting the liquid level of the raw material in the raw material barrel in real time, and the one-way air inlet valve is used for balancing the internal pressure and the external pressure of the raw material barrel; the control device controls the metering pumps to work, compares the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid in real time in the raw material feeding process, starts to correct the flow of at least one metering pump when the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid have a difference value and the difference value reaches a correction set value until the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid return to the same state, and then the two metering pumps return to work according to preset parameters; the sodium chlorite aqueous solution and the hydrochloric acid are added according to the volume ratio of 1: 1, and chlorine dioxide generated by reaction in the reaction kettle and reaction residual liquid are added into a water body to be disinfected in real time in the form of a disinfectant.
Further, the metering pump is a diaphragm type metering pump, the control device corrects the flow rate of the metering pump of the feeding unit with a high raw material liquid level value by increasing the working frequency of the metering pump until the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid are restored to the same state, or corrects the flow rate of the metering pump of the feeding unit with a low raw material liquid level value by decreasing the working frequency of the metering pump of the feeding unit with a low raw material liquid level value until the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid are restored to the same state, or corrects the flow rate of the two metering pumps by decreasing the working frequency of the metering pump of the feeding unit with a low raw material liquid level value and simultaneously increasing the working frequency of the metering pump of the feeding unit with a high raw material liquid level value until the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid are restored to the same state.
Further, the sodium chlorite aqueous solution is a sodium chlorite aqueous solution with the concentration of 7% -8%, and the hydrochloric acid is hydrochloric acid with the concentration of 8% -9%.
Further, the sodium chlorite aqueous solution is 8% sodium chlorite aqueous solution, and the hydrochloric acid is 9% hydrochloric acid.
Further, when the difference value of the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid exceeds the correction set value and reaches the fault shutdown set value, the control device stops the work of the two metering pumps and sends a fault shutdown alarm signal.
Further, the control device is provided with a raw material residual value, and sends a raw material supplementing alarm signal when the liquid level value of one or two raw materials is reduced to the raw material residual value.
Further, the control device is provided with a material shortage level value, and when the liquid level meter detects that the level value of one or two raw materials drops to the material shortage level value, the control device stops the work of the two metering pumps and sends a material shortage alarm signal.
Furthermore, the reaction kettle is tubular with end walls at two ends and is vertically arranged, a raw material input port is arranged on the upper end wall of the reaction kettle, a disinfectant output port is arranged on the lower end wall of the reaction kettle, the sodium chlorite aqueous solution and the hydrochloric acid are sent into the reaction kettle after being intersected by a tee joint above the reaction kettle, and the disinfectant output port of the reaction kettle is connected with a disinfectant input port of a water supply pipeline through a pipeline.
Furthermore, the control device is provided with a wireless transmitting module and is connected with the remote control center through the wireless transmitting module and a wireless network.
Furthermore, the liquid level meter is an ultrasonic liquid level meter or a floating ball type liquid level meter, a liquid suction pipeline of the metering pump is inserted in the raw material barrel, a one-way valve is arranged at the inlet end of the liquid suction pipeline, and a back pressure valve is arranged on the output pipeline of the metering pump.
For small water-using occasions such as villages and communities, the dosage of chlorine dioxide used for water body disinfection is small, the flow specification of a metering pump used in a chlorine dioxide production device is small, the inner diameter of a used connecting pipeline is small and is often only 3-6mm, and a raw material barrel is not always ideal pure liquid, wherein a small amount of solid impurities are brought along with the supplementary raw materials sometimes, the crystallization of sodium chlorate and sodium chlorite can slowly occur on the inner walls of the sodium chlorate and sodium chlorite feeding pipelines and on the membrane of the metering pump and the inner walls of the inlet and the outlet in the working process, air bubbles can also occur in the pipelines of the hydrochloric acid feeding unit along with the change of the environmental temperature, once the solid impurities in the raw material barrel are sucked into the flow channel, or, the crystallization and the bubbles appear in the raw material feeding flow passage of the raw material feeding unit, which increases the resistance of the flow passage and even blocks the flow passage, thus hindering the normal feeding of the raw material.
Under the condition that chlorine dioxide generated by reaction and reaction residual liquid are put into a water body to be treated in a disinfectant mode, if sodium chlorite aqueous solution and hydrochloric acid are not added according to a set proportion, the condition of insufficient reaction can occur, the conversion rate of the chlorine dioxide is reduced, excessive chlorate ions or chlorite ions or excessive hydrochloric acid can enter the water body to threaten water safety, and the amount of the chlorine dioxide put into the water body is insufficient to influence the disinfection effect on the water body.
In order to ensure that the raw materials are accurately and quantitatively added, although the existing high-end metering pump with a metering feedback function can be used for adding the raw materials, the high-end metering pump is expensive and has strict requirements on working conditions, and the high-end metering pump is difficult to work stably for a long time under the working conditions.
The chlorine dioxide production device provided by the invention controls the feeding of the raw materials by utilizing the liquid level meter arranged on the raw material barrel to be matched with the common metering pump, so that the device has correction capability on the feeding of the raw materials, the feeding amount of the raw materials is reflected by directly utilizing a liquid level value, the truth and reliability of the feeding amount data are ensured, the quantitative and proportional feeding of the two raw materials are ensured, meanwhile, the structure is simple, the requirement on working conditions is low, and the device can stably run for a long time. The same raw material barrel is used for containing the two raw materials, the two raw materials are added according to the volume ratio of 1: 1 under the condition that the initial liquid level values are the same, the two raw materials are fully and quickly reacted, the conversion rate of chlorine dioxide is high, meanwhile, the comparison of the adding amount of the two raw materials is greatly facilitated, the control program of the control device is simplified, the visual inspection of a manager on the adding condition of the raw materials is facilitated, and the subsequent supplement of the two raw materials is facilitated. Chlorine dioxide and reaction residual liquid are used as disinfectants to be thrown into water bodies, so that the requirement on water body disinfection is met, the working process of the chlorine dioxide production device is simplified, and the simplicity of the structure of the whole production device is kept.
In addition, the invention compares the level values of the two raw materials in real time, and adjusts the adding amount of the raw materials in time when the difference value of the level values of the two raw materials is up to the correction set value, so that the adding amount of the raw materials is controlled within the range meeting the water body disinfection requirement even if fluctuation occurs, and the safety and reliability of water body disinfection are ensured.
The reaction speed and the yield of the chlorine dioxide of the two raw materials are closely related to the concentration and the adding proportion of the raw material solution, 7-8% of sodium chlorite aqueous solution and 8-9% of hydrochloric acid are used as the raw materials, and the sodium chlorite aqueous solution and the hydrochloric acid are added according to the volume ratio of 1: 1, so that the sodium chlorite aqueous solution and the hydrochloric acid can react quickly and fully, the yield of more than 95% is obtained, the continuous operation of the production of the chlorine dioxide is realized, and the continuous disinfection of the flowing water body is realized.
Set up the back pressure valve on the output line of measuring pump not only can eliminate the influence of low reaches pressure fluctuation to measuring pump steady operation, moreover, can prevent that the raw materials in the raw materials bucket is inhaled the water because of the siphon under the circumstances of measuring pump stop work. The one-way valve is arranged at the inlet of the liquid pumping pipeline of the metering pump, so that raw materials in the metering pump and the pipeline can be prevented from flowing back to the raw material barrel, and the metering pump and the pipeline on the upstream and the downstream of the metering pump are always filled with raw material solution under the condition that the metering pump stops working together with the back pressure valve, and the precipitation of sodium chlorate or sodium chlorite is delayed.
A chlorine dioxide apparatus for producing for disinfecting village or community water is installed in unmanned on duty's environment usually, utilizes wireless transmitting module to link to each other it with remote control center, can make things convenient for the staff to monitor a plurality of chlorine dioxide apparatus for producing that distribute at the multiple spot greatly, knows the operating condition of device in real time, in time changes adjusting device's operating parameter according to the water supply condition, in time discharges the trouble, supplements the raw materials.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1 raw material barrel I, 2 raw material barrel II, 3 reaction kettle, 4 metering pump I, 5 metering pump II, 6 floating ball type liquid level meter, 6.1 liquid level meter rod body, 6.2 liquid level meter floating ball, 7 one-way air inlet valve, 8 one-way valve, 9 back pressure valve and 10 raw material barrel cover.
Detailed Description
The present invention will be described with reference to examples.
Fig. 1 shows an embodiment of the chlorine dioxide production device for water disinfection of the present invention.
As shown in the figure, the chlorine dioxide production apparatus for water disinfection in this example includes a reaction kettle 3, a sodium chlorite aqueous solution adding unit located at the left side of the reaction kettle 3, a hydrochloric acid adding unit located at the right side of the reaction kettle 3, and a control apparatus (not shown in the figure); the sodium chlorite aqueous solution adding unit comprises a raw material barrel I1, a metering pump I4 and connecting pipelines at the upstream and downstream sides of the metering pump I, a liquid suction pipeline at the inlet side of the metering pump I4 is inserted into the raw material barrel I1, a one-way valve 8 is arranged at the inlet of the liquid suction pipeline, a back pressure valve 9 is arranged on the connecting pipeline at the outlet side of the metering pump I4, a sodium chlorite aqueous solution is contained in the raw material barrel I1, the metering pump I4 sucks the sodium chlorite aqueous solution in the raw material barrel I1 and conveys the sodium chlorite aqueous solution to a reaction kettle 3 along the direction indicated by an arrow at the left side in the upper side of the drawing, the raw material barrel I1 is of a closed structure, a floating ball type liquid level meter 6 is inserted on the top wall of the raw material barrel I, a floating ball 6.2 of the liquid level meter floats on the liquid level of the sodium chlorite aqueous solution and moves along a liquid level meter rod body 6.1 along with the lifting of the liquid level, a one-way air inlet valve 7 and a raw material barrel cover 10 are also arranged on the top wall of the raw material barrel I1, the liquid level meter 6 is used for detecting the liquid level of the sodium chlorite aqueous solution in real time, and the detection signal is transmitted to the control device, when the liquid level of the sodium chlorite aqueous solution descends, external air enters the raw material barrel I1 through the one-way air inlet valve 7, so that the internal pressure and the external pressure of the raw material barrel I1 are kept balanced; the hydrochloric acid adding unit and the sodium chlorite aqueous solution adding unit have the same structure, the shape and the specification of the raw material barrel II 2 are the same as those of the raw material barrel I1, and the metering pump II 5 pumps the hydrochloric acid in the raw material barrel II 2 and conveys the hydrochloric acid to the reaction kettle 3 along the direction indicated by the arrow at the upper right side in the figure; the aqueous solution of sodium chlorite is 8 percent aqueous solution of sodium chlorite, the hydrochloric acid is 9 percent hydrochloric acid, the initial liquid level values of the aqueous solution of sodium chlorite and the hydrochloric acid are the same, and the two are added according to the volume ratio of 1: 1.
The reaction kettle 3 is tubular with end walls at two ends and is vertically arranged, a raw material input port is arranged on the upper end wall of the reaction kettle 3, a disinfectant output port is arranged on the lower end wall of the reaction kettle, the feeding pipelines of the sodium chlorite aqueous solution and the hydrochloric acid are connected with the input pipeline of the reaction kettle 3 through a tee joint above the reaction kettle 3, and the output port at the lower end of the reaction kettle 3 is connected with a disinfectant feeding port of a water supply pipeline through a pipeline (not shown in the figure).
The sodium chlorite aqueous solution and the hydrochloric acid are converged above the reaction kettle 3 through a tee joint and then are input into the reaction kettle 3, so that the reaction kettle with a simple tubular structure which is vertically arranged can enable the two raw materials to finish the reaction along with the downward flow and form the required disinfectant at the lower end of the reaction kettle.
The capacity of the first raw material barrel 1 and the second raw material barrel 2 is 100 liters, and the first metering pump 4 and the second metering pump 5 are diaphragm metering pumps.
When the device works, firstly, a sodium chlorite aqueous solution is added into a raw material barrel I1, hydrochloric acid with the same volume is added into a raw material barrel II 2, the required input chlorine dioxide dosage is selected according to the water body condition, then the working frequency of a metering pump I4 and a metering pump II 5 is set through a control device according to the selected chlorine dioxide dosage, then the control device starts two metering pumps to work, the sodium chlorite aqueous solution and the hydrochloric acid are added into a reaction kettle 3 according to the required quantity and the volume ratio of 1: 1, chlorine dioxide is generated by reaction in the reaction kettle 3, the chlorine dioxide is dissolved in reaction residual liquid to form a disinfectant, the disinfectant is continuously output from an output port at the lower end of the reaction kettle 3 (an arrow below the reaction kettle 3 in the figure when the chlorine dioxide is input into the water body through a pipeline), and the disinfectant is continuously output along with the continuous input of the raw materials, so that the disinfection treatment of the water body is realized.
It should be noted that, when the dosage of chlorine dioxide is selected in the early stage, not only the pollution condition of the water body but also the flow rate of the water supply in the water supply pipeline of the water body need to be considered.
Along with the work of the production device, the sodium chlorite aqueous solution in the raw material barrel I1 and the hydrochloric acid in the raw material barrel II 2 are continuously consumed, and when the liquid level meter 6 detects that the liquid level value of one or two raw materials is reduced to the set raw material residual value, the control device sends a raw material supplementing alarm signal to inform a manager of supplementing the raw materials in time so as to avoid influencing the normal disinfection of the water body. When the manager fails to supplement the raw materials in time, the level value of one or two raw materials is lowered to the material shortage level value, the raw materials are indicated to be used up, the control device stops the work of the two metering pumps, and a material shortage alarm signal is sent out.
Two kinds of raw materials in two raw materials buckets are along with throwing its liquid level and constantly descend, and two level gauges 6 real-time detection two kinds of liquid level values of raw materials and give controlling means with the testing result transmission, and controlling means carries out real-time comparison to the liquid level value of two kinds of raw materials. When the difference value of the two level values appears, the adding amount of one of the raw materials is lower than the amount required by the set proportion, when the difference value further reaches a correction set value, the control device starts to correct the adding amounts of the two raw materials, and can increase the adding amount of the raw material by increasing the working frequency of the metering pump corresponding to the raw material with the higher level value so as to restore the level values of the two raw materials to the same state, or reduce the adding amount of the raw material by reducing the working frequency of the metering pump corresponding to the raw material with the lower level value so as to restore the level values of the two raw materials to the same state, or increase the working frequency of the other metering pump at the same time of reducing the working frequency of the metering pump corresponding to the raw material with the lower level value so as to restore the level values of the two raw materials to the same state. Of course, whether the working frequency of the metering pump is increased or decreased, the dosage of the raw materials should be kept within a range that can effectively sterilize the water body. And when the liquid level values of the two raw materials are restored to the same state through correction, the control device controls the two metering pumps to restore to the preset working frequency again.
Under the conditions that a flow channel of a certain raw material feeding unit has overlarge resistance or is blocked (the flow channel of the sodium chlorite feeding unit is blocked generally) or a metering pump cannot work normally, even if the control device corrects the feeding amount of the raw materials, the difference value of the liquid level values of the two raw materials can still be expanded continuously, when the difference value of the liquid level values of the two raw materials exceeds the correction set value and further reaches a fault shutdown set value, the raw materials with high liquid level values cannot be fed normally, the control device stops the work of the two metering pumps to prevent a single raw material from being fed into a water body, and sends a fault shutdown alarm signal to inform managers of timely eliminating faults.
Because the dosage of the chlorine dioxide required for disinfecting the water body has a certain range, when the dosage of a certain raw material is lower than the dosage required by the set proportion and needs to be corrected, the dosage of the raw material is still within the range allowed by the safety standard without influencing the effective disinfection of the water body.
The concentration of 8 percent and 9 percent are the optimal matching concentration of the sodium chlorite aqueous solution and the hydrochloric acid, and in practical use, as long as the concentration of the sodium chlorite aqueous solution is in the range of 7 percent to 8 percent and the concentration of the hydrochloric acid is in the range of 8 percent to 9 percent, the rapid and sufficient reaction of the sodium chlorite aqueous solution and the hydrochloric acid can be ensured and the conversion rate of chlorine dioxide of more than 95 percent can be obtained by adding the sodium chlorite aqueous solution and the hydrochloric acid according to the volume ratio of 1: 1.
The water disinfection equipment of small-size water occasion has numerous, the characteristics of position dispersion, equipment provider can not be equipped with special maintainer for every equipment, require equipment user to be equipped with special managers and then can increase running cost and personnel extravagant, therefore, can set up wireless emission module for chlorine dioxide apparatus for producing, utilize wireless emission module and public wireless network to link to each other it with remote control center, construct the thing allies oneself with the system of centralized management, can arrange the work of a small amount of managers management and control an area's equipment like this, in time supply the raw materials to equipment, in time discover the trouble and get rid of the trouble, in time adjust equipment working parameter according to seasonal variation, can also utilize hierarchical management to make relevant personnel in time know the running state of equipment through wireless device such as cell-phones.
The liquid level meter in the above example is a floating ball type liquid level meter, and the metering pump is a diaphragm type metering pump, and besides, various suitable liquid level meters such as an ultrasonic liquid level meter and various known suitable metering pumps may be used.
In addition, the aqueous sodium chlorite solution in the above example is an aqueous sodium chlorite solution, and an aqueous sodium chlorite solution with an appropriate concentration may be used as the aqueous sodium chlorite solution and hydrochloric acid with an appropriate concentration may be selected as hydrochloric acid to produce the chlorine dioxide disinfectant, which will not be described further herein.
Finally, it should be pointed out that the technical solutions protected by the present invention may have various other embodiments that can be made by those skilled in the art, besides the above examples, which are only used for illustration and do not limit the protection scope of the present invention.
Claims (10)
1. A chlorine dioxide production device for water body disinfection is characterized by comprising a sodium chlorite aqueous solution adding unit, a hydrochloric acid adding unit, a reaction kettle and a control device, wherein the sodium chlorite aqueous solution adding unit and the hydrochloric acid adding unit respectively comprise a raw material barrel, a connecting pipeline and a metering pump, the metering pump sucks raw materials in the raw material barrel of the adding unit through the connecting pipeline and adds the raw materials into the reaction kettle, the two adding units adopt raw material barrels with the same shape and specification, and the initial liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid are the same; the raw material barrel is of a closed structure, a liquid level meter and a one-way air inlet valve are arranged on the raw material barrel, the liquid level meter is used for detecting the liquid level of the raw material in the raw material barrel in real time, and the one-way air inlet valve is used for balancing the internal pressure and the external pressure of the raw material barrel; the control device controls the metering pumps to work, compares the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid in real time in the raw material feeding process, starts to correct the flow of at least one metering pump when the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid have a difference value and the difference value reaches a correction set value until the liquid level values of the sodium chlorite aqueous solution and the hydrochloric acid return to the same state, and then the two metering pumps return to work according to preset parameters; the sodium chlorite aqueous solution and the hydrochloric acid are added according to the volume ratio of 1: 1, and the chlorine dioxide generated by the reaction in the reaction kettle and the reaction residual liquid are put into the water body to be disinfected in real time in the form of disinfectant.
2. The apparatus for producing chlorine dioxide according to claim 1, wherein the metering pump is a diaphragm type metering pump, the control means corrects the flow rate by increasing the operating frequency of the metering pump of the dosing unit having a high level value of the raw material until the level values of the aqueous sodium chlorite solution and the hydrochloric acid are restored to the same state, or corrects the flow rate by decreasing the operating frequency of the metering pump of the dosing unit having a low level value of the raw material until the level values of the aqueous sodium chlorite solution and the hydrochloric acid are restored to the same state, or corrects the flow rates of the two metering pumps by decreasing the operating frequency of the metering pump of the dosing unit having a low level value of the raw material and simultaneously increasing the operating frequency of the metering pump of the dosing unit having a high level value of the raw material until the level values of the aqueous sodium chlorite solution and the hydrochloric acid are restored to the same state.
3. Chlorine dioxide production unit according to claim 1, wherein the aqueous sodium chlorite solution is an aqueous sodium chlorite solution with a concentration of 7% to 8%, and the hydrochloric acid is a hydrochloric acid with a concentration of 8% to 9%.
4. The apparatus for producing chlorine dioxide as claimed in claim 3, wherein said aqueous sodium chlorite solution is an aqueous sodium chlorite solution with a concentration of 8%, and said hydrochloric acid is a hydrochloric acid with a concentration of 9%.
5. Chlorine dioxide production plant according to claim 1, wherein said control means stops the operation of both said metering pumps and issues a malfunction alarm signal when the difference between the level values of said aqueous sodium chlorite solution and hydrochloric acid exceeds said modified set value and reaches a malfunction set value.
6. Chlorine dioxide production unit according to claim 1, wherein the control unit is provided with a raw material residual value and issues a supplementary raw material alarm signal when the level value of one or both of the raw materials drops to the raw material residual value.
7. Chlorine dioxide production unit according to claim 1, wherein the control means is provided with a starved level value, and when the level meter detects that the level value of one or both of the two raw materials has dropped to the starved level value, the control means stops the operation of both of the metering pumps and issues a starved alarm signal.
8. The apparatus for producing chlorine dioxide as claimed in claim 1, wherein the reaction vessel is tubular with end walls at both ends, and is vertically arranged, the upper end wall of the reaction vessel is provided with a raw material inlet, the lower end wall of the reaction vessel is provided with a disinfectant outlet, the aqueous sodium chlorite solution and the hydrochloric acid are delivered into the reaction vessel after being converged by a tee above the reaction vessel, and the outlet of the reaction vessel is connected with the disinfectant inlet of the water supply pipeline through a pipeline.
9. Chlorine dioxide production unit according to claim 1, wherein the control unit is provided with a wireless transmission module and is connected to a remote control centre via the wireless transmission module and a wireless network.
10. A chlorine dioxide producing apparatus as claimed in claim 1, wherein said level gauge is an ultrasonic level gauge or a float level gauge, a liquid suction line of said metering pump is inserted into said raw material tank, a check valve is provided at an inlet end of the liquid suction line, and a back pressure valve is provided at an output line of the metering pump.
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| CN202210381297.5A CN114772554A (en) | 2022-04-13 | 2022-04-13 | Chlorine dioxide production device for water disinfection |
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