CN214570934U - High-concentration subacidity hypochlorous acid water electrolysis device - Google Patents
High-concentration subacidity hypochlorous acid water electrolysis device Download PDFInfo
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Abstract
The utility model discloses a little acidic hypochlorous acid of high concentration brineelectrolysis device, including the electrolysis trough, electrolysis trough connects electrolytic power supply, be equipped with the electrolysis electrode with electrolytic power supply intercommunication in the electrolysis trough, electrolysis electrode is equipped with positive pole and negative pole, the electrolysis trough includes water inlet and delivery port, the upper end of electrolysis trough is located to the delivery port, the lower extreme of electrolysis trough is located to the water inlet, inlet tube and feed liquor pipe are connected to the water inlet, the electrolysis trough passes through advance water piping connection water installations, the electrolysis trough passes through feed liquor pipe links to each other with the electrolysis auxiliary liquid case, the alkali supply device is still connected to the electrolysis trough delivery port, the alkali supply device is connected to through defeated alkali union coupling the delivery port department of electrolysis trough. The beneficial effects are that the electrolysis efficiency is high, the pH value of the electrolyzed water can be adjusted at will, and the stability of the available chlorine is improved.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a high-concentration subacidity hypochlorous acid water electrolysis device.
Background
The slightly acidic electrolyzed water is also called slightly acidic hypochlorous acid water and slightly acidic electrolyzed oxidizing water. The slightly acidic electrolyzed water is prepared by electrolyzing dilute hydrochloric acid to obtain effective chlorine, has high bactericidal effect, is colorless and odorless, is widely used for sterilization, fresh-keeping and the like of agriculture, animal husbandry, fishery, beverage, food, medical treatment and the like, can ensure safety, and has the characteristics of reducing cost and lightening environmental load.
In the existing production method of subacid electrolyzed water, when subacid hypochlorous acid water with the effective chlorine concentration of 10-30mg/L is generated, dilute hydrochloric acid is usually used as an auxiliary electrolyte; if the effective chlorine concentration is required to be generated to be 30-80mg/L, the electrolyte auxiliary liquid is usually selected from mixed liquid, salt and hydrochloric acid are mixed according to a certain proportion to keep the pH value of the generated electrolyzed water to be 4-7. Therefore, in order to produce a high-concentration efficient chlorine electrolyte, it is necessary to use a mixed solution having a high salt content as an auxiliary electrolyte; the method has the defects of low electrolysis efficiency and high energy consumption, and the generated subacid electrolyzed water has high residual concentration of negative monovalent chloride ions, quick reduction of available chlorine and poor stability. Therefore, a method for producing subacid electrolyzed water having high electrolysis efficiency and high stability of available chlorine in the final product is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a subacid electrolysis water apparatus for producing can improve effective chlorine concentration and adjust the pH value wantonly, improves electrolysis efficiency to show the stability that improves effective chlorine.
Therefore, the utility model adopts the technical scheme that: the utility model provides a little acidic hypochlorous acid of high concentration brineelectrolysis device, includes the electrolysis trough, and electrolysis power is connected to the electrolysis trough, be equipped with the electrolysis electrode with electrolysis power intercommunication in the electrolysis trough, the electrolysis electrode is equipped with positive pole and negative pole, the electrolysis trough includes water inlet and delivery port, the upper end of electrolysis trough is located to the delivery port, the lower extreme of electrolysis trough is located to the water inlet, inlet tube and feed liquor pipe are connected to the water inlet, the electrolysis trough passes through advance water piping connection water inlet unit, the electrolysis trough passes through the feed liquor pipe is assisted the liquid case with the electrolysis and is linked to each other, the alkali supply device is still connected to the electrolysis trough delivery port, the alkali supply device is connected to through defeated alkali union coupling the delivery port department of electrolysis trough.
Preferably, the inlet tube still includes one or more segmentation inlet tubes, the segmentation inlet tube locate on the lateral wall of electrolysis trough and with the electrolysis trough intercommunication, with the segmentation inlet tube corresponds the position and still is equipped with segmentation feed liquor pipe, segmentation feed liquor pipe with segmentation inlet tube intercommunication, all be equipped with the valve on segmentation inlet tube and the segmentation feed liquor pipe.
Preferably, a flow meter is arranged behind the valve.
Preferably, the alkali supply device adopts an alkali liquor box, and a delivery pump is arranged on the alkali liquor box.
The method for producing high-concentration subacid hypochlorous acid electrolyzed water comprises the steps of electrolyzing dilute hydrochloric acid in an electrolytic bath body, adding water for dilution, and adding an alkaline regulator for regulating the pH value.
Preferably, the alkaline regulator is an alkaline metal salt or an alkaline earth metal salt in a powdery, flaky, massive, granular or solution state.
Preferably, the alkaline regulator is NaOH, KOH, Ca (OH)2, Mg (OH)2, or the like.
Preferably, the pH of the final electrolyzed water is adjusted by the addition of NaOH solution.
Preferably, the generated hypochlorous acid electrolyzed water has a final pH value of 3 to 7.
Compared with the prior art, the beneficial effects of the utility model are embodied in the following aspects:
(1) the electrolysis efficiency is high, and the pH value of the electrolyzed water is adjusted by adding alkali liquor, so that the stability of the available chlorine is improved; (2) the electrolyzed water after electrolysis has less impurity residues, the effective chlorine concentration is greatly improved and can reach thousands of mg/L, and the generated electrolyzed water product has excellent indexes and obviously improved product stability; (3) and sectional liquid adding electrolysis is adopted, so that the electrolyte is fully mixed, and the electrolysis efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of example one of the present invention;
FIG. 2 is a schematic structural diagram of example two of the present invention;
FIG. 3 is a schematic structural diagram of example three of the present invention;
FIG. 4 is a graph showing the change of hypochlorous acid concentration with pH value in the electrolyzed water according to the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
The utility model discloses a hypochlorous acid brineelectrolysis device and method mainly used subacid brineelectrolysis keeps the effective chlorine of high concentration and makes effective chlorine have good stability to solve the poor problem of effective chlorine stability among the prior art.
As shown in figure 1, the utility model relates to a high-concentration subacidity hypochlorous acid water electrolysis device, which comprises an electrolytic tank 1, wherein the electrolytic tank 1 is connected with an electrolytic power supply, an electrolysis electrode communicated with an electrolysis power supply is arranged in the electrolysis bath, the electrolysis electrode is provided with an anode and a cathode, the electrolytic tank 1 comprises a water inlet 2 and a water outlet 3, the water outlet 3 is arranged at the upper end of the electrolytic tank 1, the water inlet 2 is arranged at the lower end of the electrolytic bath 1, the water inlet 2 is connected with a water inlet pipe 4 and a liquid inlet pipe 5, the electrolytic tank 1 is connected with a water inlet device through the water inlet pipe 4, the electrolytic tank 1 is connected with an electrolytic auxiliary liquid tank 6 through the liquid inlet pipe 5, all be equipped with valve 7 on inlet tube 4 and the feed liquor pipe 5, electrolysis trough delivery port 3 still connects and supplies alkali device 8, supply alkali device 8 to through defeated alkali pipe 9 be connected to the delivery port 3 department of electrolysis trough. The alkali supply device 8 adopts an alkali liquor box 8, and a delivery pump is arranged on the alkali liquor box.
The method also comprises a method for producing the high-concentration subacid hypochlorous acid electrolyzed water, wherein dilute hydrochloric acid serving as an electrolysis auxiliary liquid is electrolyzed in a tank body of an electrolytic tank, water is added for dilution, in order to improve the stability of a finished product, the diluted water is pure water, and after the electrolysis, alkali liquor is added for adjusting the pH value, wherein in the embodiment, the alkali liquor is NaOH solution.
The reaction process of the electrolyzed water is as follows:
2HCl ⇌ H2 + Cl2
Cl2 + H2O ⇌ HClO + HCl
HCl + NaOH⇌ NaCl + H2O
the pH value of the final electrolyzed water is adjusted by the addition amount of NaOH solution. In order to meet the requirement of slightly acidic electrolyzed water as food additive, the final pH value of the generated hypochlorous acid electrolyzed water is 3-7.
FIG. 4 is a graph showing the change of hypochlorous acid concentration with pH, in which the pH of the electrolyzed mixture was adjusted with NaOH solution to 5 to 6.5 to improve the stability of the final product in order to produce hypochlorous acid electrolyzed water having good stability.
The operation process of the device is that the valves on the water inlet pipe 4 and the liquid inlet pipe 5 are opened, water and electrolysis auxiliary liquid enter the electrolytic tank 1 through the water inlet 2, the electrolytic power supply is switched on, the electrolytic reaction is carried out in the electrolytic tank to generate hypochlorous acid and hydrochloric acid, the electrolyzed mixed liquid flows out through the water outlet 3, meanwhile, NaOH solution in the alkaline liquid tank 8 is mixed with the electrolyzed mixed liquid through the alkaline conveying pipe through the conveying pump, the pH value of the electrolyzed water is adjusted to be 5-6.5, and finally subacidity electrolyzed water is generated.
By adopting the production method of the high-concentration subacid hypochlorous acid electrolyzed water, the stability of the finally generated product is obviously improved, and the effective chlorine concentration can reach 3 percent.
Example two
As shown in fig. 2, the water inlet pipe 4 further comprises two segment water inlet pipes 41, the segment water inlet pipes 41 are arranged on the side wall of the electrolytic cell 1 and communicated with the electrolytic cell, segment liquid inlet pipes 51 are further arranged at positions corresponding to the segment water inlet pipes 41, the segment liquid inlet pipes 51 are communicated with the electrolytic cell through segment liquid inlets 10 after the segment water inlet pipes 41 are communicated, and valves are arranged on the segment water inlet pipes 41 and the segment liquid inlet pipes 51. And a flow meter is also arranged behind the valve.
Through set up the segmentation inlet on the electrolysis trough, steerable segmentation is intake or is advanced electrolysis and assist liquid for the electrolytic reaction in the electrolysis trough is more abundant, and electrolysis efficiency obtains effectively improving.
EXAMPLE III
The other technical solutions are the same as the embodiment, except that, as shown in fig. 3, a terminal water inlet 11 is arranged at the liquid outlet 3, and a valve and a flow meter are arranged at the terminal water inlet. The tail end water inlet is arranged at the liquid outlet, so that the electrolyzed water solution electrolyzed in the electrolytic bath can be uniformly diluted.
The detection and evaluation methods for the related indexes of the slightly acidic electrolytic water in the following experiments are all from GB/T36758-2018 hygienic Specification for chlorine-containing disinfectants
EXAMPLE four (Dilute hydrochloric acid- -tap water- -base)
1000 liters of subacid electrolyzed water with 60mg/L of effective chlorine is generated every hour by using the device of the utility model.
(1) Electrolysis:
in the operation process of the device, 3 percent of dilute hydrochloric acid solution is added by an acid solution pump for 2 kg/h and enters an electrolytic cell for electrolysis, the voltage is 2-6V, and the current is 100A during electrolysis.
(2) Diluting: adding tap water (Hainan) to dilute to 1000L/h
(3) Adding alkali: 100 g/h of 10% NaOH solution was added by means of an alkali solution pump.
In this case, slightly acidic hypochlorous acid water having an available chlorine of 65mg/L and a pH of 6.1 was produced.
COMPARATIVE EXAMPLE I (Dilute hydrochloric acid- -tap water)
1000 liters of subacid electrolyzed water with 60mg/L of effective chlorine is generated every hour by using the device of the utility model.
(1) Electrolysis:
in the operation process of the device, 3 percent of dilute hydrochloric acid solution is added by an acid solution pump for 2 kg/h and enters an electrolytic cell for electrolysis, the voltage is 2-6V, and the current is 100A during electrolysis.
(2) Diluting: adding tap water (Hainan) to dilute to 1000L/h
In this case, slightly acidic hypochlorous acid water having an available chlorine of 55mg/L and a pH of 3.11 was produced.
The difference between the first comparative example and the fourth example is that the concentration of the final generated effective chlorine is obviously reduced and the pH value is obviously reduced without adding NaOH for neutralization.
EXAMPLE five (Dilute hydrochloric acid- -pure water- -base)
1000 liters of 240mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 8 kg/h of 3% dilute hydrochloric acid solution is added through an acid solution pump and enters an electrolytic cell for electrolysis, wherein the voltage is 2-6V and the current is 400A during electrolysis.
(2) Diluting: adding pure water to dilute the solution to 1000L/h
(3) Adding alkali: a10% NaOH solution was added by means of an alkali solution pump at 1 kg/h.
The resultant slightly acidic hypochlorous acid water having an available chlorine of 246mg/L and a pH of 6.1 had a residual chlorine ion content of 85 mg/L.
Comparative example two, (Dilute hydrochloric acid- - -pure water)
1000 liters of 240mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 8 kg/h of 3% dilute hydrochloric acid solution is added through an acid solution pump and enters an electrolytic cell for electrolysis, wherein the voltage is 2-6V and the current is 400A during electrolysis.
(2) Diluting: adding pure water to dilute the solution to 1000L/h
237mg/L of available chlorine and 360mg/L of slightly acidic hypochlorous acid water having a pH of 2.5 were produced.
Comparative example two differs from example five in that no NaOH was added to neutralize this step.
COMPARATIVE EXAMPLE III (Dilute hydrochloric acid + salt- - -pure water)
1000 liters of 240mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 8 kg/h of mixed solution of 3% hydrochloric acid and 7% salt is added through an acid solution pump and enters an electrolytic cell for electrolysis, wherein the voltage is 2-6V and the current is 500A during electrolysis.
(2) Diluting: adding pure water to dilute the solution to 1000L/h
226mg/L of available chlorine produced at this time, 990mg/L of chloride ion remained in slightly acidic hypochlorous acid water having a pH of 5.56.
The difference from the fifth embodiment is that the traditional process of the mixed solution of hydrochloric acid and salt is adopted for electrolysis, so the actual consumption of the electrolyte is increased, the electrolysis power is increased, the residual chloride ions are increased, and the available chlorine and the pH value are not as good as the fifth embodiment.
The difference from the fifth embodiment is that NaOH is not added for neutralization.
The fifth example, the second comparative example and the third comparative example were analyzed:
500mL of 10 bottles are reserved for the fifth example and the third comparative example, and the stability acceleration test of the 1-year effective period is carried out according to the method of GB/T36758-2018 sanitation standard of chlorine-containing disinfectant, wherein the reduction rate of the effective chlorine of the fifth example is 5.8% -11.3%, the requirement of the 1-year effective period is met, and the reduction rate of the third comparative example is 29.3% -42.8%, and the reduction rate does not reach the standard. The second comparative example did not participate in the stability test because the pH did not meet the 3-7 requirement.
In terms of residual chloride ion content, the content of residual chloride ions in the fifth example is less than that in the second comparative example and is far less than that in the third comparative example.
EXAMPLE six (Dilute hydrochloric acid- -pure water- -base)
1000 liters of 120mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 3% dilute hydrochloric acid solution is added through an acid solution pump, 4 kg/h enters a water electrolysis bath for electrolysis, the voltage is 2-6V, and the current is 200A.
(2) Diluting: adding pure water to dilute the solution to 1000L/h
(3) Adding alkali: 500 g/h of 10% NaOH solution was added by an alkali solution pump.
The resulting slightly acidic hypochlorous acid water having an available chlorine of 131mg/L and a pH of 6.21 had a residual chloride ion content of 68 mg/L.
EXAMPLE seven, (Dilute hydrochloric acid-alkali water (alkali + pure water))
1000 liters of 120mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 3% dilute hydrochloric acid solution is added through an acid solution pump, 4 kg/h enters a water electrolysis bath for electrolysis, the voltage is 2-6V, and the current is 200A.
(2) Adding alkali: 500 g/hr of a 10% NaOH solution was added to pure water by an alkali solution pump to form an alkali water.
(3) Diluting: adding alkaline water for dilution to 1000L/h
The resulting slightly acidic hypochlorous acid water having an available chlorine of 133mg/L and a pH of 6.01 had a residual chloride ion content of 65 mg/L.
The difference from the sixth embodiment is that the pure water is first mixed into the alkaline water and then the electrolytic water is diluted.
EXAMPLE eight (Dilute hydrochloric acid-pure water-alkali powder)
1000 liters of 120mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 3% dilute hydrochloric acid solution is added through an acid solution pump, 4 kg/h enters a water electrolysis bath for electrolysis, the voltage is 2-6V, and the current is 200A.
(2) Adding alkali: NaOH particles are absorbed into pure water through a siphon method to form alkaline water, and the absorption amount of each ton of pure water is 50g of NaOH.
(3) Diluting: adding alkaline water for dilution to 1000L/h
The slightly acidic hypochlorous acid water having an available chlorine of 130mg/L and a pH of 6.45 was produced at this time, and had a residual chlorine ion content of 70 mg/L.
The difference from the seventh example is that NaOH granules are used directly.
EXAMPLE nine (Dilute hydrochloric acid-pure water-tank + base)
1000 liters of 120mg/L subacid electrolyzed water is generated every hour by using the device of the utility model.
(1) Electrolysis:
when the device is in operation, 3% dilute hydrochloric acid solution is added through an acid solution pump, 4 kg/h enters a water electrolysis bath for electrolysis, the voltage is 2-6V, and the current is 200A.
(2) Diluting: adding alkaline water for dilution to 1000L/h
(3) Adding alkali: adding 500 g/h of 10% NaOH solution through an alkali solution pump, and adding into an acid water tank.
The resulting slightly acidic hypochlorous acid water having an available chlorine of 132mg/L and a pH of 6.1 had a residual chloride ion content of 68 mg/L.
The difference from the sixth embodiment is that the alkali liquor is directly added into the acid water tank.
Experiments of the sixth embodiment, the seventh embodiment, the eighth embodiment and the ninth embodiment show that the effects of the two embodiments are basically not different and are based on the principle of the patent: only a single dilute hydrochloric acid solution is electrolyzed, and the chloride ions provided by the hydrochloric acid are generated into effective chlorine, so that the electrolysis efficiency is highest, and the residual chloride ions of the product are lowest; and (3) neutralizing residual HCl generated by electrolysis by using alkali liquor, and adjusting the pH value of the electrolyzed water.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a little acidic hypochlorous acid of high concentration brineelectrolysis device, a serial communication port, including the electrolysis trough, electrolysis power is connected to the electrolysis trough, be equipped with the electrolysis electrode with electrolysis power intercommunication in the electrolysis trough, the electrolysis electrode is equipped with positive pole and negative pole, the electrolysis trough includes water inlet and delivery port, the upper end of electrolysis trough is located to the delivery port, the lower extreme of electrolysis trough is located to the water inlet, inlet tube and feed liquor pipe are connected to the water inlet, the electrolysis trough passes through advance water piping connection water inlet unit, the electrolysis trough passes through feed liquor pipe links to each other with the electrolysis auxiliary liquid case, the alkali supply device is still connected to the electrolysis trough delivery port, the alkali supply device is connected to through defeated alkali union coupling the delivery port department of electrolysis trough.
2. The high-concentration subacid hypochlorous acid water electrolysis device according to claim 1, wherein the water inlet pipe further comprises one or more segmented water inlet pipes, the segmented water inlet pipes are arranged on the side wall of the electrolytic cell and communicated with the electrolytic cell, segmented liquid inlet pipes are further arranged at positions corresponding to the segmented water inlet pipes and communicated with the segmented water inlet pipes, and valves are arranged on the segmented water inlet pipes and the segmented liquid inlet pipes.
3. The high-concentration slightly acidic hypochlorous acid water electrolysis device according to claim 2, wherein a flow meter is further provided behind the valve.
4. The high-concentration subacid hypochlorous acid water electrolysis device according to claim 1, wherein the alkali supply device adopts an alkali liquor tank, and a delivery pump is arranged on the alkali liquor tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112777692A (en) * | 2021-02-24 | 2021-05-11 | 烟台方心水处理设备有限公司 | High-concentration subacidity hypochlorous acid water electrolysis device and production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777692A (en) * | 2021-02-24 | 2021-05-11 | 烟台方心水处理设备有限公司 | High-concentration subacidity hypochlorous acid water electrolysis device and production method |
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Effective date of registration: 20221116 Address after: Room 248, Floor 2, No. 36, Wuzhishan Road, Yantai Economic and Technological Development Zone, Shandong Province, 264000 Patentee after: Fangxinshui new technology (Shandong) Co.,Ltd. Address before: No.4, Zhichu South Road, Zhifu District, Yantai City, Shandong Province Patentee before: Yantai Fangxin water treatment equipment Co.,Ltd. |