CN216737904U - High chlorine waste water electrochemistry dechlorination device - Google Patents

High chlorine waste water electrochemistry dechlorination device Download PDF

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Publication number
CN216737904U
CN216737904U CN202123126600.7U CN202123126600U CN216737904U CN 216737904 U CN216737904 U CN 216737904U CN 202123126600 U CN202123126600 U CN 202123126600U CN 216737904 U CN216737904 U CN 216737904U
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China
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tank
exchange membrane
electrode
ion exchange
waste water
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Expired - Fee Related
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CN202123126600.7U
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Chinese (zh)
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赵雪纯
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North China Electric Power University
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North China Electric Power University
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Abstract

The utility model discloses a high chlorine waste water electrochemistry dechlorination device, including electrolysis box, proton exchange membrane, chloride ion exchange membrane, sodium ion exchange membrane, power, first electrode and second electrode. Wherein: the electrolytic tank is provided with an electrolytic cavity; the proton exchange membrane, the chlorine ion exchange membrane and the sodium ion exchange membrane are arranged in the electrolytic tank and divide the electrolytic chamber into an anode tank, a hydrochloric acid tank, a waste water tank and a cathode tank; the positive pole and the negative pole of the power supply are respectively connected with the first electrode and the second electrode through leads, and the first electrode and the second electrode respectively extend into the anode groove and the cathode groove. The utility model provides a high chlorine waste water electrochemistry dechlorination device coupling electrolysis water and two techniques of membrane separation can effectively get rid of the high concentration chloride ion in the waste water, and does not directly oxidize the chloride ion and produce toxic gas chlorine, and the security is higher.

Description

High chlorine waste water electrochemistry dechlorination device
Technical Field
The utility model relates to a water treatment associated equipment technical field especially relates to a high chlorine waste water electrochemistry dechlorination device.
Background
High chlorine (Cl) content in a plurality of fields of industrial production in China-) Wastewater, typically desulfurized wastewater from coal-fired power plants, wherein Cl is present-The content can reach 20000 mg/L. The accumulation of chloride ions in the production system, the discharge of high-chlorine wastewater and the like can cause serious corrosion phenomena, which leads to the damage of equipment (materials) and even the occurrence of accidents. Because of the nature of chloride ion, it is difficult to remove it by simple chemical method, but it is evaporated and concentrated,The treatment processes such as flue evaporation (mainly used in coal-fired power plants) have the problems of high energy consumption, huge equipment, high early investment and the like, so that the development of a dechlorination technology for high-chlorine wastewater is necessary.
At present, the electrolytic method is applied to the treatment of high-chlorine wastewater, but the main method is to directly oxidize Cl in the wastewater-And the product chlorine is toxic gas, so that the process has certain potential safety hazard. The products of the water electrolysis process are hydrogen and oxygen which are nontoxic and harmless gases, but the application of the water electrolysis process cannot directly realize the removal of chloride ions in the high-chlorine wastewater.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem existing in the background technology, the utility model provides a dechlorination device for high chlorine waste water electrochemistry.
The utility model provides a pair of high chlorine waste water electrochemistry dechlorination device, including electrolysis box, proton exchange membrane, chloride ion exchange membrane, sodium ion exchange membrane, power, first electrode and second electrode, wherein:
the electrolytic tank is provided with an electrolytic cavity;
the proton exchange membrane, the chloride ion exchange membrane and the sodium ion exchange membrane are arranged in the electrolytic tank, and the proton exchange membrane, the chloride ion exchange membrane and the sodium ion exchange membrane divide the electrolytic chamber into an anode tank, a hydrochloric acid tank, a waste water tank and a cathode tank, wherein the sodium ion exchange membrane is arranged between the waste water tank and the cathode tank, the chloride ion exchange membrane is arranged between the waste water tank and the hydrochloric acid tank, and the proton exchange membrane is arranged between the hydrochloric acid tank and the anode tank;
specifically, an anode tank is formed by proton exchange and the inner wall of an electrolytic box, a hydrochloric acid tank is formed by a proton exchange membrane, a chlorine ion exchange membrane and the inner wall of the electrolytic box, a waste water tank is formed by the chlorine ion exchange membrane, a sodium ion exchange membrane and the inner wall of the electrolytic box, or the waste water tank is formed by the chlorine ion exchange membrane and the sodium ion exchange membrane, industrial waste water is placed in the waste water tank, a cathode tank is formed by the sodium ion exchange membrane and the inner wall of the electrolytic box, and electrolyte in the cathode tank is sodium hydroxide solution;
the positive pole and the negative pole of the power supply are respectively connected with the first electrode and the second electrode through leads, and the first electrode and the second electrode respectively extend into the anode groove and the cathode groove.
To increase the efficiency of the electrolysis, it is preferred in some embodiments that both the first electrode and the second electrode are mesh electrodes.
The power supply may be a prior art power supply for electrolysis, and in some embodiments is preferably a dc regulated power supply.
As the utility model discloses further optimized scheme still is equipped with a pH value detection device in the hydrochloric acid groove to in detect the pH value in the hydrochloric acid groove, and then adjust the pH value in the hydrochloric acid groove.
When the acidity in the hydrochloric acid tank is larger, part of the hydrochloric acid in the hydrochloric acid tank can be discharged, and according to the principle of a communicating vessel, water in the waste water tank or the anode tank can enter the hydrochloric acid tank so as to reduce the acidity in the hydrochloric acid tank; the hydrochloric acid in the hydrochloric acid tank can be directly taken out by a container, and can also be discharged by arranging a liquid discharge hole on the side wall of the electrolytic tank.
As the utility model discloses further optimized scheme still includes gives aqueous ammonia mechanism, when the acidity is great in the hydrochloric acid groove, neutralizes hydrochloric acid through letting in aqueous ammonia in the hydrochloric acid groove for aqueous ammonia mechanism, reduces the acidity of liquid in the hydrochloric acid groove.
Can let in the hydrochloric acid groove with the aqueous ammonia through the pipeline, also can be through the container with the aqueous ammonia to going into the hydrochloric acid groove in, preferred in some embodiments, give aqueous ammonia mechanism for spraying the formula and give aqueous ammonia mechanism, include the aqueous ammonia shower nozzle for aqueous ammonia mechanism, the aqueous ammonia shower nozzle is installed on the electrolysis box, and the spraying end of aqueous ammonia shower nozzle is relative with the hydrochloric acid groove for spray the aqueous ammonia in the hydrochloric acid groove, increase the reaction rate of aqueous ammonia and hydrochloric acid, and then the increase reduces the work efficiency of acidity.
In order to facilitate the detection of the alkalinity in the cathode slot, as the utility model discloses the scheme of further optimization still includes second pH value detection device, and second pH value detection device establishes in the cathode slot.
When the alkalinity in the cathode tank is larger, water in the wastewater tank can enter the cathode tank according to the principle of the communicating vessel by discharging a part of liquid in the cathode tank so as to reduce the alkalinity in the cathode tank; the liquid in the cathode tank can be directly taken out by a container or can be discharged by arranging a liquid discharge hole on the side wall of the electrolytic tank.
As the further optimized proposal of the utility model, when the alkalinity in the cathode slot detected by the second pH value detection device is larger, the cathode slot is added with fresh water for neutralization, and then the cathode slot is provided with a fresh water mechanism which is arranged on the electrolytic tank and is used for introducing fresh water into the cathode slot.
As the utility model discloses the scheme of further optimization, give fresh water mechanism for spray the formula, specific, including the fresh water shower nozzle, the fresh water shower nozzle is installed on the electrolysis chamber, and the water spray end of fresh water shower nozzle is relative with the negative pole groove, and the fresh water shower nozzle evenly sprays fresh water to the negative pole groove in, and then improves the alkalinity in the negative pole groove and reduces inefficiency.
In order to facilitate the supplement of the sulfuric acid into the anode tank, the device also comprises a sulfuric acid supplement mechanism which can directly pour the sulfuric acid into the anode tank through a container; in order to increase efficiency, as the utility model discloses further optimized scheme, sulphuric acid is mended the mechanism and is for spraying the formula, and sulphuric acid is mended the mechanism and is included the sulphuric acid shower nozzle, and the sulphuric acid shower nozzle is installed on the box, and the spraying end of sulphuric acid shower nozzle is relative with the anode tank and is arranged in spraying sulphuric acid to the anode tank.
The utility model provides a high chlorine waste water electrochemistry dechlorination device, it has coupled two technologies of electrolysis water and membrane separation, can effectively get rid of high concentration chloride ion in the waste water, and does not directly oxidize chloride ion and produce toxic gas chlorine, and the security is higher.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of partial ion migration during operation of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the orientations and positional relationships indicated in the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The electrochemical dechlorination device for high-chlorine wastewater shown in fig. 1-2 comprises an electrolytic tank 12, a proton exchange membrane 3, a chloride ion exchange membrane 6, a sodium ion exchange membrane 7, a direct-current voltage-stabilizing and current-stabilizing power supply 5, a first electrode 1 and a second electrode 9, wherein:
in particular, the proton exchange membrane 3 is of the usual type NafionTMThe common type of the chloride ion exchange membrane 6 is an Ionsep-HC-A anion exchange membrane, and the common type of the sodium ion exchange membrane 7 is a perfluorinated ion exchange membrane;
the proton exchange membrane 3, the chlorine ion exchange membrane 6 and the sodium ion exchange membrane 7 are sequentially arranged in parallel in the electrolytic tank 12, the proton exchange membrane 3 and the inner wall of the electrolytic tank 12 form an anode tank I, electrolyte in the anode tank I is dilute sulfuric acid, the proton exchange membrane 3, the chlorine ion exchange membrane 6 and the inner wall of the electrolytic tank 12 form a hydrochloric acid tank II, the chlorine ion exchange membrane 6, the sodium ion exchange membrane 7 and the inner wall of the electrolytic tank 12 form a wastewater tank III, industrial wastewater is placed in the wastewater tank III, the sodium ion exchange membrane 7 and the inner wall of the electrolytic tank 12 form a cathode tank IV, and the electrolyte in the cathode tank IV is sodium hydroxide solution;
in the embodiment, the first electrode 1 and the second motor are preferably in a net shape, so that the electrolysis efficiency is increased;
specifically, the first electrode 1 and the second electrode 9 are a Pt electrode and a copper electrode, respectively;
the anode of the direct current voltage and current stabilizing power supply 5 is connected with the first electrode 1, the first electrode 1 extends into the anode groove I, the second electrode 9 is connected with the cathode of the direct current voltage and current stabilizing power supply 5, and the second motor extends into the cathode groove IV;
in order to facilitate the detection of the pH value in the hydrochloric acid tank II, a first pH value detection device 11 is also arranged in the hydrochloric acid tank II so as to detect the pH value in the hydrochloric acid tank II in real time;
in this embodiment, it is preferable that the hydrochloric acid neutralizing device further includes an ammonia water supplying mechanism, and when the acidity in the hydrochloric acid tank II is relatively high, the hydrochloric acid is neutralized by introducing ammonia water into the hydrochloric acid tank II through the ammonia water supplying mechanism, so as to reduce the acidity;
in the embodiment, preferably, the ammonia water supply mechanism is a spraying ammonia water supply mechanism, the ammonia water supply mechanism comprises an ammonia water spray head 4, the ammonia water spray head 4 is installed on the electrolytic tank 12, the spraying end of the ammonia water spray head 4 is opposite to the hydrochloric acid tank II, an external pipeline and a pump are connected with the ammonia water spray head 4, the pump pumps ammonia water to the ammonia water spray head 4 through the pipeline and sprays the ammonia water from the ammonia water spray head 4, the reaction speed of the ammonia water and hydrochloric acid is increased, and the working efficiency of reducing acidity is increased;
in order to facilitate the detection of the alkalinity in the cathode bath IV, it is preferable in this embodiment to further include a second pH detection device 10, the second pH detection device 10 being provided in the cathode bath IV;
in this embodiment, preferably, when the alkalinity in the cathode bath IV detected by the second pH detection device 10 is higher, fresh water is added to the cathode bath IV for neutralization, and further, a fresh water supply mechanism is further included, and the fresh water supply mechanism is installed on the electrolytic tank 12 and is used for supplying fresh water to the cathode bath IV;
preferably, the fresh water supply mechanism is of a spraying type, and specifically comprises a fresh water spray nozzle 8, the fresh water spray nozzle 8 is installed on the electrolytic tank 12, the water spraying end of the fresh water spray nozzle 8 is opposite to the cathode tank IV, the water pump is connected with the water spray nozzle through a connecting pipe, the water pump sprays fresh water in an external water tank into the cathode tank IV through the connecting pipe and the fresh water spray nozzle 8, and therefore alkalinity reducing efficiency in the cathode tank IV is improved;
in order to facilitate the supplement of the sulfuric acid into the anode tank I, the anode tank I also comprises a sulfuric acid spray head 2, wherein the sulfuric acid spray head 2 is arranged on the tank body, and the liquid outlet end of the sulfuric acid spray head 2 is opposite to the anode tank I and is used for supplementing the sulfuric acid into the anode tank I.
In the working process of the embodiment: as shown in fig. 2, chloride ions in the wastewater tank III enter the hydrochloric acid tank II through the chloride ion exchange membrane 6, hydrogen ions in the sulfuric acid liquid in the anode tank I enter the hydrochloric acid tank II through the proton exchange membrane 3 and combine with the chloride ions to form hydrochloric acid, sodium ions in the wastewater tank III enter the cathode tank IV through the sodium ion exchange membrane 7, an electrolyzed water system is introduced by using a membrane separation technology, and the ion exchange membrane is used to realize migration of a separator in the middle of the electrolyzed water system to a specific direction, thereby completing enrichment of chloride ions and removing the chloride ions from the system;
the device is coupled with two technologies of electrolysis water and membrane separation, can effectively remove high-concentration chloride ions in the wastewater, does not directly oxidize the chloride ions to generate toxic gas chlorine, and has higher safety; hydrochloric acid enriched in the hydrochloric acid tank II can be neutralized through an ammonia water spraying device, migration and removal of chloride ions are accelerated, and an ammonium chloride solution generated by reaction can be used as a fertilizer or an industrial raw material, so that resource recycling is realized; two groups of pH monitoring devices are arranged, so that the acid-base property and the chloride ion removal condition of the electrolyte solution can be monitored conveniently, and the electrolyte solution can be adjusted and replaced conveniently.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. The utility model provides a high chlorine waste water electrochemistry dechlorination device which is characterized in that includes electrolysis box, proton exchange membrane, chloride ion exchange membrane, sodium ion exchange membrane, power, first electrode and second electrode, wherein:
the electrolytic tank is provided with an electrolytic cavity;
the proton exchange membrane, the chloride ion exchange membrane and the sodium ion exchange membrane are arranged in the electrolytic tank, and the proton exchange membrane, the chloride ion exchange membrane and the sodium ion exchange membrane divide the electrolytic chamber into an anode tank, a hydrochloric acid tank, a waste water tank and a cathode tank, wherein the sodium ion exchange membrane is arranged between the waste water tank and the cathode tank, the chloride ion exchange membrane is arranged between the waste water tank and the hydrochloric acid tank, and the proton exchange membrane is arranged between the hydrochloric acid tank and the anode tank;
the positive pole and the negative pole of the power supply are respectively connected with the first electrode and the second electrode through leads, and the first electrode and the second electrode respectively extend into the anode groove and the cathode groove.
2. The electrochemical dechlorination apparatus for high chlorine waste water according to claim 1, wherein the first electrode and the second motor are both mesh electrodes.
3. The electrochemical dechlorination apparatus for high chlorine waste water according to claim 1, wherein the power supply is a DC voltage-stabilizing current-stabilizing power supply.
4. The electrochemical dechlorination apparatus for high chlorine wastewater according to claim 1, wherein a first pH value detection device is further provided in the hydrochloric acid tank.
5. The electrochemical dechlorination device of high chlorine wastewater according to claim 1, further comprising an ammonia water supply mechanism, wherein the ammonia water supply mechanism is installed on the electrolytic tank and is used for introducing ammonia water into the hydrochloric acid tank.
6. The electrochemical dechlorination device of high chlorine wastewater according to claim 5, characterized in that the ammonia water supply mechanism comprises an ammonia water nozzle, the ammonia water nozzle is installed on the electrolytic tank, and the ammonia water nozzle is used for spraying ammonia water into the hydrochloric acid tank.
7. The electrochemical dechlorination apparatus for high chlorine wastewater according to claim 1, further comprising a second pH value detection device, wherein the second pH value detection device is disposed in the cathode tank.
8. The electrochemical dechlorination apparatus for high chlorine waste water according to claim 7, further comprising a fresh water supply mechanism, which is installed on the electrolytic tank and is used for supplying fresh water to the cathode tank.
9. The electrochemical dechlorination apparatus for high chlorine wastewater according to claim 8, wherein the fresh water supply means comprises a fresh water spray nozzle, and the fresh water spray nozzle is installed on the electrolytic tank and used for spraying fresh water into the cathode tank.
CN202123126600.7U 2021-12-13 2021-12-13 High chlorine waste water electrochemistry dechlorination device Expired - Fee Related CN216737904U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123126600.7U CN216737904U (en) 2021-12-13 2021-12-13 High chlorine waste water electrochemistry dechlorination device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123126600.7U CN216737904U (en) 2021-12-13 2021-12-13 High chlorine waste water electrochemistry dechlorination device

Publications (1)

Publication Number Publication Date
CN216737904U true CN216737904U (en) 2022-06-14

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Application Number Title Priority Date Filing Date
CN202123126600.7U Expired - Fee Related CN216737904U (en) 2021-12-13 2021-12-13 High chlorine waste water electrochemistry dechlorination device

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CN (1) CN216737904U (en)

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Granted publication date: 20220614