CN109970158B - Electrochemistry sewage treatment system - Google Patents
Electrochemistry sewage treatment system Download PDFInfo
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- CN109970158B CN109970158B CN201910273927.5A CN201910273927A CN109970158B CN 109970158 B CN109970158 B CN 109970158B CN 201910273927 A CN201910273927 A CN 201910273927A CN 109970158 B CN109970158 B CN 109970158B
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- sewage
- reaction tank
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- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
An electrochemical sewage treatment system utilizes an electric flocculation reaction to generate hydroxide precipitation of metal ions, and uses the coagulability thereof to gather colloidal substances and pollutants in water, so that heavy metal cations in the water can be removed, microorganisms in the water can be killed, and charged colloidal substances can be precipitated and other ions, colloids and emulsions can be obviously removed in the process; wherein through the structure setting of electric flocculation reaction tank, can realize that sewage is whole in electric flocculation reaction channel purifies, avoids simultaneously in the electric flocculation reaction tank altogether the floc to discharge the influence to purifying effect. The electrochemical sewage treatment system can be used for treating domestic sewage, industrial sewage or municipal sewage.
Description
Technical Field
The invention relates to a sewage treatment system, in particular to an electrochemical sewage treatment system.
Background
Water is a life source, is a basic substance on which human beings rely to live, and is covered by water in parts of the earth, but the fresh water resources which can be really utilized by human beings are very few. With the rapid development of social economy, the water demand is increased rapidly, and in addition to the waste of water and the pollution of water resources, the lag of sewage treatment facilities and the control of non-point source pollution are insufficient, so that the fresh water resources face two problems of water environmental pollution and water resource shortage. This is increasingly and increasingly more prevalent in some countries and regions, especially in developing countries and regions.
Compared with the shortage of water resources, the method is more urgent to the problem of water resource pollution. The clean water source is one of the basic elements for human survival and social sustainable development, and the problem that natural water resources are polluted by various organic matters is getting worse due to the rapid increase of the discharge amount of waste water caused by the development of human activities and industrial production. Especially wastewater discharged by chemical, pesticide, dye, medicine, food and other industries, has high concentration, large chroma, strong toxicity and complex components, contains a large amount of components which are difficult to be biologically degraded, and brings serious water pollution to the world. Therefore, the treatment, purification and reuse of sewage become important, and if the problem of water resource pollution can be solved well, the shortage of water resources can be relieved to a great extent.
In sewage treatment, the electrochemical flocculation method is also called as an electric flocculation method, namely a soluble electrode (generally an iron electrode or an aluminum electrode) is used as a positive electrode and dissolved in sewage under the action of current to generate hydroxide precipitates of metal ions, and colloidal substances and pollutants in water are aggregated by using the hydroxide precipitates, so that the aim of purifying water quality is fulfilled. The electroflocculation technique involves the reaction of water pollutants with strong electric fields and electrochemically generated oxidation and reduction reactions, which removes heavy metal cations from the water and kills microorganisms in the water, which precipitates charged colloidal matter and removes other ions, colloids, and emulsions significantly. The electric flocculation technology can effectively remove pollutants in water, and is proved by practice, and the electric flocculation technology can be applied to various industrial wastewater treatments, and can be applied to removal of pathogens, heavy metals and pollutants of cleaning water in food production in agriculture and rural areas where the quality of life is emphasized.
In order to achieve a better purification effect, an electric flocculation reaction tank in the prior art usually arranges a water outlet at a position close to the top or the bottom of the reaction tank after purification. However, when the specific gravity of the co-flocs is small, the co-flocs are adhered to bubbles and float to the water surface, and when the specific gravity of the co-flocs is large, the co-flocs sink, so that the concentration of the co-flocs near the water outlet arranged at the top or the bottom is high, and part of the co-flocs are discharged from the reaction tank together when the water is discharged, so that the purification is incomplete. In order to solve the above problems, in the prior art, as described in CN103910460A and CN105271615A, a multi-channel reaction tank is usually adopted, and sewage is treated by a plurality of parallel channels and then discharged, however, the multi-channel structure results in a complex system structure and an increased volume, and at the same time, co-flocs floating or sinking still exist at the top or bottom water outlet.
Disclosure of Invention
The invention provides an electrochemical sewage treatment system which can avoid the influence of the discharge of common flocs in an electrocoagulation reaction tank on the purification effect, improve the sewage purification effect, has a simple structure and can not cause the increase of the system volume.
As one aspect of the present invention, there is provided an electrochemical sewage treatment system comprising: a source water tank for holding sewage to be treated; the adjusting tank is used for adjusting sewage parameters according to the detection value of the sewage; an electrocoagulation reaction tank which is provided with a cathode part and an anode part and performs sewage purification treatment by electrochemical flocculation; the water inlet pipeline is used for inputting sewage into the electric flocculation reaction tank; the water outlet pipeline outputs the purified water of the electric flocculation reaction tank; the cathode part is positioned in the center of the electrocoagulation reaction tank, is of a closed annular cathode structure, is lower than the reaction tank, and forms an electrocoagulation reaction channel with the inner wall of the reaction tank; the water inlet pipeline inputs sewage to the bottom end of the electric flocculation reaction channel; the anode part comprises a plurality of anodes arranged between the inner wall of the reaction tank and the cathode part; the water outlet pipeline comprises a lift pump and an output pipe, wherein the output pipe extends into the cathode part nearby about 1/2 of the height of the inside of the cathode part and is used for outputting the purified water in the cathode part through the lift pump.
Further, the sewage that inputs the electric flocculation reaction pond flows along the electric flocculation reaction passageway upwards, then flows into inside the negative pole portion, flows to the inside output tube mouth of about 1/2 height of negative pole portion along the inside downward flow of negative pole portion and goes out, passes through the output tube output by the elevator pump.
Further, the purified water output by the output pipe is input into a subsequent deep purification system for further purification.
Further, the deep purification system comprises a biological filter or an MBR reactor.
Further, the electrochemical sewage treatment system is used for treating domestic sewage, industrial sewage or municipal sewage.
Furthermore, a sludge outlet is arranged above the side wall of the electric flocculation reaction tank.
Furthermore, the mud outlet comprises a plurality of mud outlets which are uniformly arranged above the side wall of the electric flocculation reaction tank.
Further, the height of the mud outlet is higher than that of the cathode part.
Furthermore, a mud scraper is arranged above the electric flocculation reaction tank and used for discharging floating sludge from the sludge outlet.
Further, the mud scraping plate moves outwards along the radial direction of the electric flocculation reaction tank during mud scraping.
Further, the cathode and the anode adopt iron, aluminum or stainless steel as electrode materials.
Further, a pH value sensor is arranged in the adjusting tank, and a pH value adjusting reagent is added into the adjusting tank according to a sensing result of the pH value sensor, so that the pH value of the sewage in the adjusting tank is in alkalescence.
Further, the weak alkalinity is that the pH value is between 7 and 8.
Further, the PH adjusting agent includes sodium hydroxide.
As another aspect of the present invention, there is provided an electrochemical sewage treatment system comprising: a source water tank for holding sewage to be treated; the adjusting tank is used for adjusting sewage parameters according to the detection value of the sewage; an electrocoagulation reaction tank which is provided with a cathode part and an anode part and performs sewage purification treatment by electrochemical flocculation; the water inlet pipeline is used for inputting sewage into the electric flocculation reaction tank; the water outlet pipeline outputs the purified water of the electric flocculation reaction tank; the cathode part is positioned in the center of the electrocoagulation reaction tank and comprises a first part and a second part, the first part is in a closed annular shape, the height of the first part is lower than that of the reaction tank, and an electrocoagulation reaction channel is formed between the first part and the inner wall of the reaction tank; the water inlet pipeline inputs sewage to the bottom end of the electric flocculation reaction channel; the second part is positioned at the top end of the first part and is of a net structure; the anode part comprises a plurality of anodes arranged between the inner wall of the reaction tank and the cathode part; the water outlet pipeline comprises a lift pump and an output pipe, wherein the output pipe extends into the cathode part nearby about 1/2 of the height of the inside of the cathode part and is used for outputting the purified water in the cathode part through the lift pump.
Drawings
FIG. 1 is a schematic view of an embodiment of an electrochemical wastewater treatment system according to the present invention.
FIG. 2 is a schematic view of a cathode portion of an electrochemical sewage treatment system according to a preferred embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the present invention, the present invention will be briefly described below by using embodiments, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other technical solutions can be obtained according to the embodiments without inventive labor, and also fall within the disclosure of the present invention.
The electrochemical sewage treatment system of the embodiment of the invention, referring to fig. 1, comprises a sewage source pool 10, a regulating pool 20, an electrocoagulation reaction pool 30, a water inlet pipeline 40 and a water outlet pipeline 50. The source sewage tank 10 is used to contain sewage to be treated, which may be domestic sewage, industrial sewage or municipal sewage. The adjusting tank 20 is used for adjusting sewage parameters according to the detection value of the sewage so as to enable the sewage to be treated to be in the appropriate condition of the electric flocculation reaction; for example, can set up pH value sensor in the equalizing basin 20 for detect the pH value of sewage, through adding pH value adjusting reagent such as sodium hydroxide in to the equalizing basin 20 according to pH value sensor's sensing result, make the pH value of the sewage in the equalizing basin be in between 7~8, thereby can reach better purifying effect.
The electrolytic flocculation reaction tank 30 is provided with a cathode portion 31 and an anode portion 32, and performs a sewage purification treatment by electrochemical flocculation. The cathode part 31 is located in the center of the electrocoagulation reaction tank 30, is of a closed annular cathode structure, and has a height lower than that of the reaction tank 30, and an electrocoagulation reaction channel 33 is formed between the cathode part and the inner wall of the reaction tank 30. The anode section 32 includes a plurality of anodes disposed between the inner wall of the reaction cell 30 and the cathode section 32. The cathode and anode may use iron, aluminum or stainless steel as an electrode material. The side wall 30 of the electric flocculation reaction tank is provided with a sludge outlet 34 above, the height of the sludge outlet 34 is higher than that of the cathode part 31, and the sludge outlet 34 can be provided with a plurality of sludge outlets which are uniformly arranged on the side wall above the electric flocculation reaction tank 30. Can set up corresponding mud scraper above electrocoagulation reaction tank 30, the mud scraper can pass through motor control, along electrocoagulation reaction tank 30 radial outside motion when the mud scraping for discharge from mud outlet 34 with the mud of come-up.
And the water inlet pipeline 40 is used for inputting the sewage in the regulating tank 20 to the electric flocculation reaction tank 30. And the water outlet pipeline 50 outputs the purified water of the electric flocculation reaction tank 30. The water inlet of the water inlet pipeline 40 is positioned at the bottom end of the electric flocculation reaction channel 33. The water outlet pipe 50 includes a lift pump 51 and an outlet pipe 52, wherein the outlet pipe 52 extends into the cathode portion 31 at about 1/2 of the height thereof for discharging the purified water in the cathode portion 31 through the lift pump 51. The sewage of input electric flocculation reaction tank 30 upwards flows along electric flocculation reaction channel 33, carry out sewage purification treatment through electrochemical flocculation in electric flocculation reaction channel 33, the little floc of proportion of generation is adhered on the bubble and is floated to the surface of water and discharged electric flocculation reaction tank 30 by the mud scraper, the big floc of proportion sinks to electric flocculation reaction channel 33 bottom, inside rivers income negative pole portion 31 after the purification, go out along the inside downward flow of negative pole portion 31 output tube 52 mouth of pipe of about 1/2 height of negative pole portion 31, export through output tube 52 by elevator pump 51. Preferably, a deep purification system, such as a biological filter or an MBR (membrane bioreactor), can be added after the electrochemical sewage treatment system to further purify the treated sewage.
Through the structural arrangement of the electric flocculation reaction tank in the embodiment of the invention, the whole-process purification of sewage in the electric flocculation reaction channel can be realized, and the influence of the discharge of the co-flocs in the electric flocculation reaction tank on the purification effect is avoided.
Referring to fig. 2, a preferred embodiment of the present invention is different from the above embodiment in that the cathode portion 31 includes a first portion 311 and a second portion 312, the first portion 311 has a closed loop shape, and has a height lower than that of the reaction tank, and an electroflocculation reaction channel is formed between the first portion 311 and the inner wall of the reaction tank. Second portion 312 is located first portion 311 top, and it is network structure to at the reaction tank during operation, second portion 312 generates small hydrogen bubble, will get into the adhesion come-up of a small amount of flocculation in negative pole portion 31, thereby avoids it to get into the output tube mouth of pipe of negative pole portion 1/2 height, further improves sewage purification performance.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (7)
1. An electrochemical wastewater treatment system comprising: a source water tank for holding sewage to be treated; the adjusting tank is used for adjusting sewage parameters according to the detection value of the sewage; an electrocoagulation reaction tank which is provided with a cathode part and an anode part and performs sewage purification treatment by electrochemical flocculation; the cathode part and the anode part adopt iron, aluminum or stainless steel as electrode materials; the water inlet pipeline is used for inputting sewage into the electric flocculation reaction tank; the water outlet pipeline outputs the purified water of the electric flocculation reaction tank; the method is characterized in that: the cathode part is positioned in the center of the electrocoagulation reaction tank and is of a closed annular cathode structure, the bottom of the cathode part is connected with the bottom of the electrocoagulation reaction tank, the height of the cathode part is lower than that of the reaction tank, and an electrocoagulation reaction channel is formed between the cathode part and the inner wall of the reaction tank; the water inlet pipeline inputs sewage to the bottom end of the electric flocculation reaction channel; the anode part comprises a plurality of anodes arranged between the inner wall of the reaction tank and the cathode part, and the anodes are dissolved in the sewage under the action of current to generate hydroxide precipitates of metal ions; the water outlet pipeline comprises a lift pump and an output pipe, the output pipe extends into the cathode part at a position about 1/2 of the height of the inside of the cathode part and is used for outputting the purified water in the cathode part through the lift pump; the sewage input into the electric flocculation reaction tank flows upwards along the electric flocculation reaction channel, then flows into the inside of the cathode part, flows downwards along the inside of the cathode part to the outlet pipe orifice of about 1/2 height of the inside of the cathode part, and is output by the lift pump through the outlet pipe; the co-flocs with small specific gravity generated in the electrocoagulation channel are adhered to bubbles and float to the water surface along the electrocoagulation channel, and are discharged out of the electrocoagulation reaction tank by a mud scraper; the side wall top of the electric flocculation reaction tank is provided with a plurality of sludge outlets which are uniformly arranged above the side wall of the electric flocculation reaction tank.
2. The electrochemical wastewater treatment system according to claim 1, wherein: and purified water output by the output pipe is input into a subsequent deep purification system for further purification.
3. The electrochemical wastewater treatment system according to claim 2, wherein: the deep purification system comprises a biological filter or an MBR reactor.
4. The electrochemical wastewater treatment system according to claim 3, wherein: it is used for treating domestic sewage, industrial sewage or municipal sewage.
5. The electrochemical wastewater treatment system according to claim 4, wherein: the height of the mud outlet is higher than that of the cathode part.
6. The electrochemical wastewater treatment system according to claim 5, wherein: and a mud scraper is arranged above the electric flocculation reaction tank and is used for discharging the floating sludge from the sludge outlet.
7. The electrochemical wastewater treatment system according to claim 6, wherein: and a pH value sensor is arranged in the adjusting tank, and a pH value adjusting reagent is added into the adjusting tank according to a sensing result of the pH value sensor, so that the pH value of the sewage in the adjusting tank is in alkalescence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273927.5A CN109970158B (en) | 2019-04-08 | 2019-04-08 | Electrochemistry sewage treatment system |
| CN201911330070.2A CN110921794A (en) | 2019-04-08 | 2019-04-08 | Sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273927.5A CN109970158B (en) | 2019-04-08 | 2019-04-08 | Electrochemistry sewage treatment system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911330070.2A Division CN110921794A (en) | 2019-04-08 | 2019-04-08 | Sewage treatment system |
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| CN109970158A CN109970158A (en) | 2019-07-05 |
| CN109970158B true CN109970158B (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910273927.5A Active CN109970158B (en) | 2019-04-08 | 2019-04-08 | Electrochemistry sewage treatment system |
| CN201911330070.2A Withdrawn CN110921794A (en) | 2019-04-08 | 2019-04-08 | Sewage treatment system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911330070.2A Withdrawn CN110921794A (en) | 2019-04-08 | 2019-04-08 | Sewage treatment system |
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| CN110681233A (en) * | 2019-11-09 | 2020-01-14 | 海盐县鑫宇高强度标准件厂(普通合伙) | Thread rolling machine oil smoke purifier |
| CN114873696A (en) * | 2022-03-25 | 2022-08-09 | 武汉大学 | Water treatment system for synchronously removing N-P-COD (nitrogen-phosphorus-oxygen demand) in cathode electrocoagulation and electrooxidation process coupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW449574B (en) * | 1998-05-01 | 2001-08-11 | Ind Tech Res Inst | Method of wastewater treatment by electrolysis and oxidization |
| CN2828014Y (en) * | 2005-09-07 | 2006-10-18 | 冯庆中 | Electrochemical reactor |
| US8147700B2 (en) * | 2008-09-04 | 2012-04-03 | Maria Elektorowicz | Wastewater treatment system and method |
| CN101560040B (en) * | 2009-05-08 | 2011-07-13 | 北京清大国华环保科技有限公司 | Method and device for processing pharmaceutical wastewater by pulse electrocoagulation-MBR |
| CN203878007U (en) * | 2014-05-22 | 2014-10-15 | 盛发环保科技（厦门）有限公司 | Power plant desulfurization wastewater treatment device |
| CN104192953B (en) * | 2014-08-13 | 2015-09-02 | 东莞市东元新能源科技有限公司 | A kind of electricity flocculation wastewater treatment electrode |
| CN108609810A (en) * | 2018-06-07 | 2018-10-02 | 江苏善鼎环保科技有限公司 | A kind of processing method and its processing system of chemistry nickel waste water |
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- 2019-04-08 CN CN201910273927.5A patent/CN109970158B/en active Active
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| CN110921794A (en) | 2020-03-27 |
| CN109970158A (en) | 2019-07-05 |
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Effective date of registration: 20200508 Address after: 603, 6th floor, Dongsheng environmental monitoring laboratory building, Rongcheng District, Jieyang City, Guangdong Province Applicant after: Jieyang source Ecological Environmental Protection Engineering Co., Ltd Address before: 102488 Beijing Fangshan District Liangxiang Triumph Street Jianshe Road 18 -D1948 Applicant before: BEIJING YIZHILIAN TECHNOLOGY Co.,Ltd. |
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Address after: 522000 603, 6th floor, Dongsheng environmental monitoring and testing building, Rongcheng District, Jieyang City, Guangdong Province (in the Municipal Environmental Protection Bureau) Patentee after: Guangdong Yuanyuan Ecological Environmental Protection Engineering Co.,Ltd. Address before: 522000 603, 6th floor, Dongsheng environmental monitoring and testing building, Rongcheng District, Jieyang City, Guangdong Province (in the Municipal Environmental Protection Bureau) Patentee before: Jieyang source Ecological Environmental Protection Engineering Co.,Ltd. |
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Denomination of invention: Electrochemical sewage treatment system Effective date of registration: 20211207 Granted publication date: 20200602 Pledgee: China Co. truction Bank Corp Jieyang branch Pledgor: Guangdong Yuanyuan Ecological Environmental Protection Engineering Co.,Ltd. Registration number: Y2021980014236 |