CN112744900A - Electrochemical sewage integral treatment system and process - Google Patents
Electrochemical sewage integral treatment system and process Download PDFInfo
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- CN112744900A CN112744900A CN202011612935.7A CN202011612935A CN112744900A CN 112744900 A CN112744900 A CN 112744900A CN 202011612935 A CN202011612935 A CN 202011612935A CN 112744900 A CN112744900 A CN 112744900A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 326
- 238000011001 backwashing Methods 0.000 claims abstract description 121
- 238000004140 cleaning Methods 0.000 claims abstract description 117
- 238000003487 electrochemical reaction Methods 0.000 claims abstract description 45
- 239000003792 electrolyte Substances 0.000 claims abstract description 39
- 230000005518 electrochemistry Effects 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 44
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 29
- 230000001502 supplementing effect Effects 0.000 claims description 25
- 239000003814 drug Substances 0.000 claims description 19
- 239000007800 oxidant agent Substances 0.000 claims description 17
- 230000001590 oxidative effect Effects 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000008235 industrial water Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 230000037452 priming Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4618—Supplying or removing reactants or electrolyte
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to the technical field of sewage treatment, in particular to an electrochemical sewage integral treatment system and process, which can accelerate the water production speed when an electrochemical system is started, can conveniently clean electrochemical equipment, prolong the period of scaling and fouling blockage shutdown cleaning, improve the electrode efficiency and improve the practicability; including electrochemical reaction system, water inlet system, electrochemistry actuating system, backwash system and online cleaning system, wherein: the electrochemical reaction system comprises an electrochemical reaction device formed by connecting a plurality of electrochemical reactors in series or in parallel, and the water inlet system comprises a water inlet tank; the electrochemical actuating system comprises a mixer, an electrolyte feeder and a first water replenishing pipe are arranged on the mixer, and a stirrer and a first electric heater are arranged in the mixer; the backwashing system comprises a backwashing tank, a backwashing water inlet pipe and a backwashing water outlet pipe; the online cleaning system comprises a cleaning box, a cleaning water inlet pipe, a cleaning water outlet pipe and a third water replenishing pipe.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an electrochemical sewage integral treatment system and process.
Background
As is well known, industrial wastewater comprises sewage generated in various industries such as pharmacy, chemical industry, smelting, coking, oil refining and the like, and pollutants are complex in composition and are represented by high COD, high ammonia nitrogen, high salt, high hardness and the like, so that the pollutants need to be fully treated and then discharged, the pollutants are difficult to degrade by a traditional biochemical treatment method, an electrochemical treatment process is generated at the same time, the electrolyte is added into the sewage, and an electrode is electrified in an electrochemical reaction device, so that the pollutants are decomposed on the surface of the electrode, and then the sewage is treated, but when the sewage is treated by the existing electrochemical process, a circulating system needs to be started firstly, the produced water can reach the discharge standard after circulating for a period of time, the starting time is long, and the electrochemical treatment device is subjected to scaling and pollution blockage, the shutdown cleaning is needed every 1 month, and the electrode efficiency is low, thereby causing poor practicability of the sewage treatment.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide an electrochemical sewage overall treatment system which can accelerate the water production speed when an electrochemical system is started, can conveniently clean electrochemical equipment, prolong the period of scaling, fouling and shutdown cleaning, improve the electrode efficiency and improve the practicability;
the invention also aims to provide an electrochemical sewage overall treatment process which can accelerate the water production speed when an electrochemical system is started, can conveniently clean electrochemical equipment, prolongs the period of shutdown cleaning of scaling and pollution blockage and improves the electrode efficiency.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: an electrochemistry sewage integrated processing system, includes electrochemical reaction system, water inlet system, electrochemistry actuating system, backwash system and online cleaning system, wherein:
the electrochemical reaction system comprises an electrochemical reaction device formed by connecting a plurality of electrochemical reactors in series or in parallel, a power supply is arranged in the electrochemical reaction system, the output end of the electrochemical reaction system is communicated with a water outlet pipe and an internal circulation pipeline, and a water outlet regulating valve and a reflux regulating valve are respectively arranged on the water outlet pipe and the internal circulation pipeline;
the water inlet system comprises a water inlet tank, wherein a process water pipeline, a raw water pipeline and an electrolyte adding pipeline are arranged at the input end of the water inlet tank in a communicated manner, a process water valve, a raw water valve and an electrolyte adding valve are respectively arranged on the process water pipeline, the raw water pipeline and the electrolyte adding pipeline, the output end of the internal circulation pipeline is communicated with the water inlet tank, the output end of the water inlet tank is communicated with a water supply pipe, the output end of the water supply pipe is communicated with the electrochemical reaction system, and a water supply pump and an equipment water inlet valve are respectively arranged on the water supply pipe;
the electrochemical actuating system comprises a mixer, an electrolyte feeder and a first water supplementing pipe are arranged on the mixer, a first water supplementing valve is arranged on the first water supplementing pipe, a stirrer and a first electric heater are arranged in the mixer, and a magnetic turning plate liquid level meter and a thermometer are further arranged in the mixer;
the backwashing system comprises a backwashing tank, a backwashing water inlet pipe and a backwashing water drain pipe, wherein the backwashing water inlet pipe and the backwashing water drain pipe are communicated with the electrochemical reaction system, a backwashing water inlet valve and a backwashing water drain valve are respectively arranged on the backwashing water inlet pipe and the backwashing water drain pipe, the input end of the backwashing water inlet pipe is communicated with the backwashing tank, a backwashing pump is arranged on the backwashing water inlet pipe, a second water replenishing pipe is arranged at the input end of the backwashing tank, and a second water replenishing valve is arranged on the second water replenishing pipe;
the online cleaning system comprises a cleaning box, a cleaning water inlet pipe, a cleaning water outlet pipe and a third water replenishing pipe, wherein the two ends of the cleaning water inlet pipe and the two ends of the cleaning water outlet pipe are respectively communicated with the cleaning box and an electrochemical reaction system, the cleaning water inlet pipe and the cleaning water outlet valve are respectively arranged on the cleaning water inlet pipe and the cleaning water outlet pipe, a cleaning pump is arranged on the cleaning water inlet pipe, the third water replenishing pipe is communicated with the cleaning box, a third water replenishing valve is arranged on the third water replenishing pipe, and a second electric heater is arranged inside the cleaning box.
Specifically, a plurality of groups of first safety filters are communicated with the water supply pipe and are positioned between the water supply pump and the equipment water inlet valve.
Specifically, a backwashing medicine adding system is further arranged in the backwashing system, the backwashing medicine adding system comprises a pipeline mixer, a hydrochloric acid medicine adding system, a liquid caustic soda medicine adding system and an oxidant medicine adding system, the pipeline mixer is arranged on the backwashing water inlet pipe, the hydrochloric acid medicine adding system, the liquid caustic soda medicine adding system and the oxidant medicine adding system are respectively communicated with the pipeline mixer through three groups of communicating pipelines, and three groups of control valves are respectively arranged on the three groups of communicating pipelines.
Specifically, a second security filter is communicated with the cleaning water inlet pipe and is positioned between the cleaning pump and the cleaning water inlet valve.
Based on the electrochemical integrated sewage treatment system, an electrochemical integrated sewage treatment process is provided, which comprises the following steps:
s1, starting an electrochemical actuating system: adding electrolyte by an electrolyte feeder, simultaneously opening a first water supplementing valve, supplementing industrial clear water to a certain liquid level, setting the temperature to be 25-40 ℃, mixing the material for 10-15min, starting a first electric heater and a stirrer, dissolving the electrolyte into the industrial water, opening an electrolyte adding valve, and adding the electrolyte into a water inlet tank through an electrolyte adding pipeline;
s2, starting an electrochemical reaction system: opening a process water valve, adding clean water into a water inlet tank to a set liquid level, opening a water inlet valve and a backflow regulating valve of the device, closing a water outlet regulating valve, starting a water feed pump, feeding mixed water in the water inlet tank into an electrochemical treatment system through a water feed pipe, starting a power supply of the device when the backflow regulating valve circularly discharges water, opening a raw water valve and a water outlet regulating valve, regulating the backflow regulating valve and the water outlet regulating valve according to a backflow flowmeter and a produced water flowmeter which are arranged on an internal circulation pipeline and a water outlet pipe, and normally producing water by the system;
s3, operation of an electrochemical backwashing dosing system: after the first period of the electrochemical reaction system runs for 24 hours, closing a raw water valve, a water outlet regulating valve and a reflux regulating valve, closing a water inlet valve and a water feed pump of equipment, opening a backwashing water discharge valve and a backwashing water inlet valve, starting a backwashing pump, simultaneously starting a hydrochloric acid dosing pump in a hydrochloric acid dosing system, dosing for 60-180s, uniformly mixing the added liquid medicine and backwashing water in a pipeline mixer, then feeding the mixture into the electrochemical reaction system, closing the backwashing water discharge valve, the backwashing water inlet valve and the backwashing pump, soaking the electrochemical reactor for 5-30min, opening the backwashing water discharge valve and the backwashing water inlet valve, starting the backwashing pump, and backwashing for 3-5 min; repeating S2 to reuse the equipment after backwashing is completed, repeating the backwashing step after the second period of the chemical-electric reaction system starts to run for 48 hours, changing the added chemicals into liquid caustic soda and oxidant from hydrochloric acid at the moment, repeating S2, repeating the backwashing step when the first period runs for 24 hours after the equipment starts to run for 72 hours, and circularly repeating, wherein each backwashing period is 24 hours;
s4, operation of the electrochemical online cleaning system: after the electrochemical reaction system runs for 5-6 months, closing all equipment and valves, firstly, preparing a hydrochloric acid solution or a citric acid solution with the pH of 1-2 in a cleaning box, adjusting the temperature to 30-45 ℃ by using a second electric heater, opening a cleaning water inlet valve and a cleaning water outlet valve, starting a cleaning pump, circularly cleaning the electrochemical reaction system for 1 hour, stopping soaking for 1 hour, and circularly cleaning for 1 hour; and (3) emptying the cleaning solution after cleaning, then preparing a mixed solution of liquid caustic soda and an oxidant with the pH of 9-10 in the cleaning tank, and repeating the cleaning steps.
Specifically, the ratio of the reflux flow rate to the effluent flow rate regulated in the step S2 is 3:1-6: 1.
Specifically, the adding ratio of the liquid caustic soda to the oxidant in the S3 is 5:1-10: 1.
(III) advantageous effects
Compared with the prior art, the invention provides an electrochemical sewage overall treatment system, which has the following beneficial effects:
1. the invention is provided with an electrochemical priming system, electrolyte is added through the electrochemical priming system, the electrolyte is firstly mixed with industrial water and then enters a water inlet tank, the conductivity in the water inlet tank is not lower than 1000 mu S/cm, clean water containing the electrolyte is in the water inlet tank at the moment, the direct start is carried out, sewage entering the water tank through a raw water pipe is mixed with the clean water containing the electrolyte, the direct electrolysis can be carried out when the sewage enters the started electrochemical treatment system, the produced water can directly reach the standard, the problem that the circulation is needed when the traditional electrochemical system is started is solved, and the water production speed when the electrochemical system is started can be accelerated;
2. the backwashing chemical adding system is arranged, so that the fouling and blocking period of the electrochemical equipment caused by organic matters can be greatly reduced aiming at the scaling and blocking phenomena generated after the backwashing chemical adding system is used for a period of time, the shutdown cleaning period is prolonged to 5-6 months from 1 month, and the electrode efficiency and the practicability are improved;
3. the invention is provided with an online cleaning system, when the electrochemical system is seriously scaled and blocked by organic matters, the electrochemical system is stopped to clean, hydrochloric acid is added into the electrochemical cleaning device in the first step to remove the scaling of an electrochemical electrode, liquid caustic soda and an oxidant are added into the electrochemical cleaning device in the second step to remove the organic matter blocking of the electrochemical electrode, so that the problems of electrode disassembly cleaning scaling and organic matter blocking can be effectively solved;
4. the invention is provided with a water outlet regulating valve and a backflow regulating valve, when an electrochemical treatment system is started, the backflow regulating valve is firstly opened, then the water outlet regulating valve is slowly opened, the backflow ratio and the water outlet ratio are regulated according to the flow rates of a backflow flowmeter and a water outlet flowmeter arranged on the backflow regulating valve, the backflow ratio and the water outlet ratio are generally set to be 3:1-6:1, and a circulating water pump and a circulating water tank are not required to be arranged;
5. in the invention, the lift of the water supply pump is set to be 20-30m, so that impact on the electrode and the shell is avoided, the flow of the backwashing pump is generally set to be 1.5-2.5 times of that of the water supply pump, so that thorough backwashing and chemical adding washing are ensured, the lift of the cleaning pump is generally set to be 1-1.5 times of that of the water supply pump, the cleaning system is provided with an electric heater, and the temperature of cleaning water is controlled to be 30-45 ℃ so as to ensure the cleaning effect of organic matters.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a complex structure of an electrochemical reaction system;
FIG. 3 is a schematic diagram of a mating configuration of a water intake system;
FIG. 4 is a schematic diagram of a mating configuration of an electrochemical actuation system;
FIG. 5 is a schematic diagram of the configuration of the backwash system;
FIG. 6 is a schematic diagram of the mating configuration of the in-line cleaning system;
FIG. 7 is a schematic diagram of the fitting structure of the backwash dosing system;
in the drawings, the reference numbers: 1. an electrochemical reaction system: 101. an electrochemical reactor; 102. a power source; 103. a water outlet pipe; 104. an internal circulation line; 105. a water outlet regulating valve; 106. a reflux regulating valve;
2. a water inlet system: 201. a water inlet tank; 202. a process water line; 203. a raw water pipeline; 204. an electrolyte addition line; 205. a process water valve; 206. a raw water valve; 207. an electrolyte dosing valve; 208. a water supply pipe; 209. a feed pump; 210. a device water inlet valve;
3. electrochemical actuation system: 301. a mixer; 302. an electrolyte feeder; 303. a first water replenishing pipe; 304. a first water replenishing valve; 305. a stirrer; 306. a first electric heater; 307. a magnetic flap level gauge; 308. a thermometer;
4. and (3) backwashing the system: 401. a backwash tank; 402. backwashing the water inlet pipe; 403. backwashing the drain pipe; 404. backwashing the water inlet valve; 405. backwashing the drain valve; 406. a backwash pump; 407. a second water replenishing pipe; 408. a second water replenishing valve;
5. an online cleaning system: 501. a cleaning tank; 502. cleaning a water inlet pipe; 503. cleaning a water outlet pipe; 504. a third water replenishing pipe; 505. cleaning the water inlet valve; 506. cleaning a water outlet valve; 507. cleaning the pump; 508. a third water replenishing valve; 509. a second electric heater;
6. a first security filter;
7. backwashing a dosing system: 701. a pipeline mixer; 702. a hydrochloric acid dosing system; 703. a liquid caustic soda dosing system; 704. an oxidant dosing system; 705. a communicating pipe;
8. a second cartridge filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, an electrochemical integrated sewage treatment system includes an electrochemical reaction system 1, a water inlet system 2, an electrochemical priming system 3, a backwashing system 4 and an on-line cleaning system 5, wherein:
the electrochemical reaction system 1 comprises an electrochemical reaction device 101 formed by connecting a plurality of electrochemical reactors in series or in parallel, a power supply 102 is arranged in the electrochemical reaction system 1, the output end of the electrochemical reaction system 1 is communicated with a water outlet pipe 103 and an internal circulation pipeline 104, and the water outlet pipe 103 and the internal circulation pipeline 104 are respectively provided with a water outlet regulating valve 105 and a reflux regulating valve 106;
the water inlet system 2 comprises a water inlet tank 201, a process water pipeline 202, a raw water pipeline 203 and an electrolyte adding pipeline 204 are arranged at the input end of the water inlet tank 201 in a communicated manner, a process water valve 205, a raw water valve 206 and an electrolyte adding valve 207 are respectively arranged on the process water pipeline 202, the raw water pipeline 203 and the electrolyte adding pipeline 204, the output end of an internal circulation pipeline 104 is communicated with the water inlet tank 201, the output end of the water inlet tank 201 is communicated with a water supply pipe 208, the output end of the water supply pipe 208 is communicated with the electrochemical reaction system 1, a water supply pump 209 and an equipment water inlet valve 210 are respectively arranged on the water supply pipe 208, a plurality of groups of first safety filters 6 are communicated with the water supply pipe 208, and the plurality of groups of first safety filters 6 are positioned between the water supply pump;
the electrochemical actuating system 3 comprises a mixer 301, an electrolyte feeder 302 and a first water supplementing pipe 303 are arranged on the mixer 301, a first water supplementing valve 304 is arranged on the first water supplementing pipe 303, a stirrer 305 and a first electric heater 306 are arranged in the mixer 301, a magnetic turning plate liquid level meter 307 and a thermometer 308 are further arranged in the mixer 301, the electric conductivity in the water inlet tank 201 is not lower than 1000 mu S/cm through the electrochemical actuating system 3, the produced water can directly reach the standard, and the problem that circulation is needed when the traditional electrochemistry is started is solved;
the backwashing system 4 comprises a backwashing tank 401, a backwashing water inlet pipe 402 and a backwashing water outlet pipe 403, wherein the backwashing water inlet pipe 402 and the backwashing water outlet pipe 403 are both communicated with the electrochemical reaction system 1, a backwashing water inlet valve 404 and a backwashing water outlet valve 405 are respectively arranged on the backwashing water inlet pipe 402 and the backwashing water outlet pipe 403, the input end of the backwashing water inlet pipe 402 is communicated with the backwashing tank 401, a backwashing pump 406 is arranged on the backwashing water inlet pipe 402, the input end of the backwashing tank 401 is provided with a second water supplementing pipe 407, a second water supplementing valve 408 is arranged on the second water supplementing pipe 407, a backwashing medicine adding system 7 is also arranged in the backwashing system 4, the backwashing medicine adding system 7 comprises a pipeline mixer 701, a hydrochloric acid medicine adding system 702, a liquid alkali medicine adding system 703 and an oxidant medicine adding system 704, the pipeline mixer 701 is arranged on the backwashing water inlet pipe 402, the hydrochloric acid medicine adding system 702, the liquid alkali medicine adding system 703 and the oxidant, three groups of control valves are respectively arranged on the three groups of pipeline 705, the pollution and blockage period of the electrochemical equipment caused by organic matters can be greatly slowed down through the backwashing system 4, and the backwashing dosing system 7 is arranged to prolong the shutdown cleaning period from 1 month to 5-6 months;
the online cleaning system 5 comprises a cleaning box 501, a cleaning water inlet pipe 502, a cleaning water outlet pipe 503 and a third water replenishing pipe 504, two ends of the cleaning water inlet pipe 502 and the cleaning water outlet pipe 503 are respectively communicated with the cleaning box 501 and the electrochemical reaction system 1, a cleaning water inlet valve 505 and a cleaning water outlet valve 506 are respectively arranged on the cleaning water inlet pipe 502 and the cleaning water outlet pipe 503, a cleaning pump 507 is arranged on the cleaning water inlet pipe 502, the third water replenishing pipe 504 is communicated with the cleaning box 501, the third water replenishing pipe 504 is provided with a third water replenishing valve 508, a second electric heater 509 is arranged in the cleaning box 501, a second security filter 8 is communicated on the cleaning water inlet pipe 502, and the second security filter 8 is positioned between the cleaning pump 507 and the cleaning water inlet valve 505, and the system can solve the problems of electrode dismounting cleaning scale and organic matter pollution blockage;
based on the electrochemical integrated sewage treatment system, an electrochemical integrated sewage treatment process is provided, which comprises the following steps:
s1, starting an electrochemical actuating system: adding electrolyte by an electrolyte feeder, simultaneously opening a first water supplementing valve, supplementing industrial clear water to a certain liquid level, setting the temperature to be 25-40 ℃, mixing the material for 10-15min, starting a first electric heater and a stirrer, dissolving the electrolyte into the industrial water, opening an electrolyte adding valve, adding the electrolyte into a water inlet tank through an electrolyte adding pipeline, enabling the conductivity in the water inlet tank to be not lower than 1000 mu S/cm through an electrochemical actuating system, enabling the produced water to directly reach the standard, and solving the problem that the traditional electrochemical starting needs to be circulated;
s2, starting an electrochemical reaction system: opening a process water valve, adding clean water into a water inlet tank to a set liquid level, opening a water inlet valve and a backflow regulating valve of equipment, closing a water outlet regulating valve, starting a water feeding pump, wherein the lift of the water feeding pump is generally set to be 20-30m, so that impact on an electrode and a shell is avoided, mixed water in the water inlet tank enters an electrochemical treatment system through a water feeding pipe, when the backflow regulating valve circularly discharges water, starting a power supply of the equipment, opening a raw water valve and the water outlet regulating valve, regulating the backflow regulating valve and the water outlet regulating valve according to a backflow flowmeter and a produced water flowmeter arranged on an internal circulation pipeline and a water outlet pipe, wherein the ratio of backflow flow and water outlet flow is 3:1-6:1, the system normally produces water without singly arranging a circulation water pump and a circulation water tank;
s3, operation of an electrochemical backwashing dosing system: after the first period of the electrochemical reaction system runs for 24 hours, closing a raw water valve, a water outlet regulating valve and a backflow regulating valve, closing a water inlet valve and a water feed pump of equipment, opening a backwashing water discharge valve and a backwashing water inlet valve, starting a backwashing pump, simultaneously starting a hydrochloric acid dosing pump in a hydrochloric acid dosing system, dosing for 60-180s, uniformly mixing the added liquid medicine and backwashing water in a pipeline mixer, then feeding the mixture into the electrochemical reaction system, closing the backwashing water discharge valve, the backwashing water inlet valve and the backwashing pump, soaking the electrochemical reactor for 5-30min, opening the backwashing water discharge valve and the backwashing water inlet valve, starting the backwashing pump, wherein the flow rate of the backwashing pump is generally set to be 1.5-2.5 times of that of the water feed pump, ensuring thorough backwashing and dosing washing, and backwashing for; repeating S2 to reuse the equipment after backwashing is finished, repeating the backwashing step after the chemo-electric reaction system starts to operate for 48 hours after the chemo-electric reaction system operates for the second period, wherein the added medicine is changed from hydrochloric acid into liquid alkali and oxidant, the adding proportion of the liquid alkali and the oxidant is 5:1-10:1, repeating S2, repeating the backwashing step when the equipment operates for 24 hours after the equipment operates for 72 hours, and repeating the backwashing step circularly, wherein each backwashing period is 24 hours;
s4, operation of the electrochemical online cleaning system: after the electrochemical reaction system runs for 5-6 months, closing all equipment and valves, firstly, preparing a hydrochloric acid solution or a citric acid solution with the pH value of 1-2 in a cleaning box, adjusting the temperature to 30-45 ℃ by using a second electric heater to ensure the cleaning effect of organic matters, opening a cleaning water inlet valve and a cleaning water outlet valve, starting a cleaning pump, wherein the lift of the cleaning pump is generally 1-1.5 times that of a water feeding pump, circularly cleaning the electrochemical reaction system for 1 hour, stopping the operation, soaking for 1 hour, and circularly cleaning for 1 hour; and (3) emptying the cleaning solution after cleaning, then preparing a mixed solution of liquid caustic soda and an oxidant with the pH of 9-10 in the cleaning tank, and repeating the cleaning steps.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an electrochemistry sewage overall treatment system, its characterized in that includes electrochemical reaction system (1), water intake system (2), electrochemistry actuating system (3), backwash system (4) and online cleaning system (5), wherein:
the electrochemical reaction system (1) comprises an electrochemical reaction device (101) formed by connecting a plurality of electrochemical reactors in series or in parallel, a power supply (102) is arranged in the electrochemical reaction system (1), the output end of the electrochemical reaction system (1) is communicated with a water outlet pipe (103) and an internal circulation pipeline (104), and the water outlet pipe (103) and the internal circulation pipeline (104) are respectively provided with a water outlet regulating valve (105) and a reflux regulating valve (106);
the water inlet system (2) comprises a water inlet tank (201), a process water pipeline (202), a raw water pipeline (203) and an electrolyte adding pipeline (204) are arranged at the input end of the water inlet tank (201) in a communicated mode, a process water valve (205), a raw water valve (206) and an electrolyte adding valve (207) are arranged on the process water pipeline (202), the raw water pipeline (203) and the electrolyte adding pipeline (204) respectively, the output end of the internal circulation pipeline (104) is communicated with the water inlet tank (201), the output end of the water inlet tank (201) is communicated with a water supply pipe (208), the output end of the water supply pipe (208) is communicated with the electrochemical reaction system (1), and a water supply pump (209) and a water inlet valve device (210) are arranged on the water supply pipe (208);
the electrochemical actuating system (3) comprises a mixer (301), an electrolyte feeder (302) and a first water supplementing pipe (303) are arranged on the mixer (301), a first water supplementing valve (304) is arranged on the first water supplementing pipe (303), a stirrer (305) and a first electric heater (306) are arranged inside the mixer (301), and a magnetic turning plate liquid level meter (307) and a thermometer (308) are further arranged inside the mixer (301);
the backwashing system (4) comprises a backwashing tank (401), a backwashing water inlet pipe (402) and a backwashing water outlet pipe (403), wherein the backwashing water inlet pipe (402) and the backwashing water outlet pipe (403) are both communicated with the electrochemical reaction system (1), a backwashing water inlet valve (404) and a backwashing water outlet valve (405) are respectively arranged on the backwashing water inlet pipe (402) and the backwashing water outlet pipe (403), the input end of the backwashing water inlet pipe (402) is communicated with the backwashing tank (401), a backwashing pump (406) is arranged on the backwashing water inlet pipe (402), a second water supplementing pipe (407) is arranged at the input end of the backwashing tank (401), and a second water supplementing valve (408) is arranged on the second water supplementing pipe (407);
the online cleaning system (5) comprises a cleaning box (501), a cleaning water inlet pipe (502), a cleaning water outlet pipe (503) and a third water supplementing pipe (504), wherein the two ends of the cleaning water inlet pipe (502) and the two ends of the cleaning water outlet pipe (503) are respectively communicated with the cleaning box (501) and the electrochemical reaction system (1), a cleaning water inlet valve (505) and a cleaning water outlet valve (506) are respectively arranged on the cleaning water inlet pipe (502) and the cleaning water outlet pipe (503), a cleaning pump (507) is arranged on the cleaning water inlet pipe (502), the third water supplementing pipe (504) is communicated with the cleaning box (501), a third water supplementing valve (508) is arranged on the third water supplementing pipe (504), and a second electric heater (509) is arranged inside the cleaning box (501).
2. The electrochemical integrated sewage treatment system according to claim 1, wherein a plurality of groups of first safety filters (6) are communicated with the water supply pipe (208), and the plurality of groups of first safety filters (6) are positioned between the water supply pump (209) and the equipment water inlet valve (210).
3. The electrochemical integrated sewage treatment system according to claim 1, wherein a backwash chemical adding system (7) is further arranged in the backwash system (4), the backwash chemical adding system (7) comprises a pipeline mixer (701), a hydrochloric acid chemical adding system (702), a caustic soda liquid chemical adding system (703) and an oxidant chemical adding system (704), the pipeline mixer (701) is arranged on the backwash water inlet pipe (402), the hydrochloric acid chemical adding system (702), the caustic soda liquid chemical adding system (703) and the oxidant chemical adding system (704) are respectively communicated with the pipeline mixer (701) through three groups of through pipelines (705), and three groups of control valves are respectively arranged on the three groups of through pipelines (705).
4. An electrochemical integrated sewage treatment system according to claim 1, wherein a second security filter (8) is connected to the washing water inlet pipe (502), and the second security filter (8) is located between the washing pump (507) and the washing water inlet valve (505).
5. The system of claim 3, wherein the treatment process of the system comprises the following steps:
s1, starting an electrochemical actuating system: adding electrolyte by an electrolyte feeder, simultaneously opening a first water supplementing valve, supplementing industrial clear water to a certain liquid level, setting the temperature to be 25-40 ℃, mixing the material for 10-15min, starting a first electric heater and a stirrer, dissolving the electrolyte into the industrial water, opening an electrolyte adding valve, and adding the electrolyte into a water inlet tank through an electrolyte adding pipeline;
s2, starting an electrochemical reaction system: opening a process water valve, adding clean water into a water inlet tank to a set liquid level, opening a water inlet valve and a backflow regulating valve of the device, closing a water outlet regulating valve, starting a water feed pump, feeding mixed water in the water inlet tank into an electrochemical treatment system through a water feed pipe, starting a power supply of the device when the backflow regulating valve circularly discharges water, opening a raw water valve and a water outlet regulating valve, regulating the backflow regulating valve and the water outlet regulating valve according to a backflow flowmeter and a produced water flowmeter which are arranged on an internal circulation pipeline and a water outlet pipe, and normally producing water by the system;
s3, operation of an electrochemical backwashing dosing system: after the first period of the electrochemical reaction system runs for 24 hours, closing a raw water valve, a water outlet regulating valve and a reflux regulating valve, closing a water inlet valve and a water feed pump of equipment, opening a backwashing water discharge valve and a backwashing water inlet valve, starting a backwashing pump, simultaneously starting a hydrochloric acid dosing pump in a hydrochloric acid dosing system, dosing for 60-180s, uniformly mixing the added liquid medicine and backwashing water in a pipeline mixer, then feeding the mixture into the electrochemical reaction system, closing the backwashing water discharge valve, the backwashing water inlet valve and the backwashing pump, soaking the electrochemical reactor for 5-30min, opening the backwashing water discharge valve and the backwashing water inlet valve, starting the backwashing pump, and backwashing for 3-5 min; repeating S2 to reuse the equipment after backwashing is completed, repeating the backwashing step after the second period of the chemical-electric reaction system starts to run for 48 hours, changing the added chemicals into liquid caustic soda and oxidant from hydrochloric acid at the moment, repeating S2, repeating the backwashing step when the first period runs for 24 hours after the equipment starts to run for 72 hours, and circularly repeating, wherein each backwashing period is 24 hours;
s4, operation of the electrochemical online cleaning system: after the electrochemical reaction system runs for 5-6 months, closing all equipment and valves, firstly, preparing a hydrochloric acid solution or a citric acid solution with the pH of 1-2 in a cleaning box, adjusting the temperature to 30-45 ℃ by using a second electric heater, opening a cleaning water inlet valve and a cleaning water outlet valve, starting a cleaning pump, circularly cleaning the electrochemical reaction system for 1 hour, stopping soaking for 1 hour, and circularly cleaning for 1 hour; and (3) emptying the cleaning solution after cleaning, then preparing a mixed solution of liquid caustic soda and an oxidant with the pH of 9-10 in the cleaning tank, and repeating the cleaning steps.
6. The electrochemical integrated sewage treatment process of claim 5, wherein the ratio of the regulated reflux flow rate to the regulated effluent flow rate in S2 is 3:1-6: 1.
7. The electrochemical integrated wastewater treatment process of claim 5, wherein the adding ratio of the liquid caustic soda to the oxidizing agent in S3 is 5:1-10: 1.
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| CN202011612935.7A CN112744900A (en) | 2020-12-30 | 2020-12-30 | Electrochemical sewage integral treatment system and process |
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