CN220376518U - Electrochemical dephosphorization system for domestic sewage of villages and towns - Google Patents
Electrochemical dephosphorization system for domestic sewage of villages and towns Download PDFInfo
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- CN220376518U CN220376518U CN202321598654.XU CN202321598654U CN220376518U CN 220376518 U CN220376518 U CN 220376518U CN 202321598654 U CN202321598654 U CN 202321598654U CN 220376518 U CN220376518 U CN 220376518U
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- dephosphorization
- electrochemical
- chamber
- water outlet
- villages
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- 239000010865 sewage Substances 0.000 title claims abstract description 56
- 238000005273 aeration Methods 0.000 claims abstract description 13
- 238000010992 reflux Methods 0.000 claims abstract description 13
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 7
- 239000010802 sludge Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 8
- 239000011574 phosphorus Substances 0.000 abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 238000002848 electrochemical method Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 208000034699 Vitreous floaters Diseases 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 orthophosphate ions Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model relates to an electrochemical dephosphorization system for domestic sewage in villages and towns, which comprises a pretreatment unit, a biochemical treatment unit, a dephosphorization unit and a disinfection unit which are connected in sequence; the pretreatment unit comprises a grid pool and an adjusting pool which are connected in sequence; the biochemical treatment unit comprises an anoxic tank and an aerobic tank which are connected in sequence; the dephosphorization unit comprises an electrochemical dephosphorization device; the inlet end of the grid pool is provided with a coarse grid, and the regulating pool is internally provided with a first aeration device; the mixing device is arranged in the anoxic tank, the aerobic tank is provided with a second aeration device, and a mixed liquid reflux device is arranged between the aerobic tank and the anoxic tank. The electrochemical dephosphorization system for the domestic sewage of villages and towns provided by the utility model adopts an electrochemical method to remove phosphorus, has good pollutant removal effect, does not need an external reagent compared with chemical dephosphorization, is simple and convenient to operate, and has high electrochemical dephosphorization reaction speed and high operation stability compared with biological dephosphorization.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, and particularly relates to an electrochemical dephosphorization system for domestic sewage in villages and towns.
Background
The town domestic sewage refers to sewage generated by various activities of behavior in daily living of people. The existing village (village) town biological sewage treatment facilities mainly comprise small facilities, and the phosphorus removal efficiency is low. Biological dephosphorization is widely adopted in the traditional large and medium municipal sewage plants, and the dephosphorization effect is not obvious. For the village and town sewage plants, if a chemical dephosphorization method is adopted, the problems of inconvenient medicament transportation, low field management level and the like exist, the unstable control of total phosphorus in the effluent is easy to cause, and the larger risk of exceeding the standard of emission occurs. Therefore, there is a need for a phosphorous removal system that meets rural (village) town domestic sewage facility management levels and is capable of stably achieving emission standards.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an electrochemical dephosphorization system for domestic sewage in villages and towns so as to solve the problem.
The technical purpose of the utility model is realized by the following technical scheme: an electrochemical dephosphorization system for village and town domestic sewage comprises a pretreatment unit, a biochemical treatment unit, a dephosphorization unit and a disinfection unit which are connected in sequence;
the pretreatment unit comprises a grid pool and an adjusting pool which are connected in sequence;
the biochemical treatment unit comprises an anoxic tank and an aerobic tank which are connected in sequence;
the dephosphorization unit comprises an electrochemical dephosphorization device;
the inlet end of the grid pool is provided with a coarse grid, and the regulating pool is internally provided with a first aeration device;
the mixing device is arranged in the anoxic tank, the aerobic tank is provided with a second aeration device, and a mixed liquid reflux device is arranged between the aerobic tank and the anoxic tank.
Preferably, the electrochemical dephosphorization device comprises a dephosphorization chamber and a water outlet chamber, wherein the left side wall of the dephosphorization chamber is provided with a water inlet pipe which is communicated with the water outlet of the aerobic tank through a pipeline, a group of parallel electrode plates are also arranged in the dephosphorization chamber, and sewage is continuously aerated in the dephosphorization chamber and is baffled along the multipolar plates; an overflow groove is arranged between the dephosphorization chamber and the water outlet chamber, sewage overflows from the dephosphorization chamber to the water outlet chamber through the overflow groove, a water outlet pipe is arranged on the right side wall of the water outlet chamber, and the water outlet pipe is connected with the disinfection unit.
Preferably, the electrode plates comprise an electric anode electrode plate, an electric cathode electrode plate and an induction electrode plate, the electrode plates are equal and parallel in interval, and the electrode plates are alternately arranged in an anode-induction-cathode mode; the electric anode electrode plate and the induction electrode plate are iron plates, and the electric cathode electrode plate is an aluminum plate; the electrode plate is connected in a clamping groove mode.
Preferably, the electrode plate spacing of the electrochemical dephosphorization device is 1-4 cm.
Preferably, the bottom of the dephosphorization chamber is provided with a return pipe and a mud discharging pipe, the return pipe is connected in parallel with the mud discharging pipe, and the bottom of the water outlet chamber is provided with an emptying pipe.
Preferably, the mixed liquor reflux device is a reflux pump.
Compared with the prior art, the utility model has the following beneficial effects:
the electrochemical dephosphorization system for the domestic sewage of villages and towns provided by the utility model adopts an electrochemical method to remove phosphorus, has good pollutant removal effect, does not need an external reagent compared with chemical dephosphorization, is simple and convenient to operate, and has high electrochemical dephosphorization reaction speed and high operation stability compared with biological dephosphorization.
According to the electrochemical dephosphorization system for the domestic sewage in the villages and towns, provided by the utility model, sewage is baffled by the multipolar plate in the dephosphorization pool, so that the sewage short flow is avoided, the contact reaction time between the sewage and the high-concentration flocculating agent at the electrode plate is prolonged, the pollutant treatment efficiency is improved, the electrode loss is reduced, meanwhile, the electrode plate bracket is not required, the electrode plate is directly detached and replaced, the operation is simple and convenient, and the cost is low. An aeration system is introduced into the electrochemical dephosphorization device to promote the oxidation of Fe < 2+ > to Fe < 3+ >, accelerate the ion diffusion in the solution, relieve the passivation of the electrode and improve the dephosphorization efficiency.
The electrochemical dephosphorization system for the domestic sewage of the villages and towns provided by the utility model has the advantages that the electrochemical dephosphorization is used together with pretreatment, biochemical treatment and disinfection, so that the domestic sewage of the villages and towns is subjected to system treatment, and the phosphorus removal rate in the sewage is improved.
Drawings
FIG. 1 is a system diagram provided by the present utility model;
FIG. 2 is a schematic top view of an electrochemical phosphorus removal device of the present utility model.
In the above figures: 1-a pretreatment unit; a 2-biochemical treatment unit; 3-a dephosphorization unit; 4-a disinfection unit; 101-grating pool; 102-an adjusting tank; 103-coarse grille; 104-an aeration device; 201-an anoxic tank; 202-an aerobic tank; 203-stirring device; 204-an aeration device; 205—a mixed liquor reflux device; 300-electrochemical dephosphorization device; 301-dephosphorization chamber; 302-a water outlet chamber; 303-water inlet pipe; 304-an overflow launder; 305-a water outlet pipe; 306-connecting an anode electrode plate; 307-connecting the cathode electrode plate; 308-an induction electrode plate; 309-return line; 310-a mud pipe; 311-emptying pipes; 312-aeration port; 313-sludge reflux device; 400-dosing device.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 and 2, arrows in the drawings represent the sewage flowing direction, and as a preferred embodiment of the present utility model, the present embodiment provides an electrochemical dephosphorization system for domestic sewage in villages and towns, comprising a pretreatment unit 1, a biochemical treatment unit 2, a dephosphorization unit 3 and a disinfection unit 4, which are sequentially connected; the pretreatment unit 1 is used for removing larger floaters and massive garbage in sewage and homogenizing water quality, and plays a role in slowing down the change of water quality and water quantity and providing good operation conditions for subsequent systems; the biochemical treatment unit 2 is used for removing pollutants which can be degraded by microorganisms in the sewage and denitrifying the sewage; the dephosphorization unit 3 is used for removing phosphorus in the sewage; the disinfection unit 4 is used for eliminating pathogenic microorganisms in the sewage, so that the system effluent reaches the discharge standard.
Specifically, the pretreatment unit 1 comprises a grille pool 101 and an adjusting pool 102 which are sequentially connected; the biochemical treatment unit 2 comprises an anoxic tank 201 and an aerobic tank 202 which are sequentially connected; the dephosphorization unit 3 comprises an electrochemical dephosphorization device 300; a coarse grille 103 is arranged at the inlet end of the grille pool 101, and a first aeration device 104 is arranged in the regulating pool 102; the anoxic tank 201 is internally provided with a stirring device 203, the aerobic tank 202 is provided with a second aeration device 204, a mixed liquid reflux device 205 is arranged between the aerobic tank 202 and the anoxic tank 201, and the mixed liquid reflux device 205 is a reflux pump.
The pretreatment unit 1 comprises a grating pool 101 and an adjusting pool 102 which are sequentially connected, wherein a pipe network for discharging rural domestic sewage is directly connected with the grating pool 101, and the sewage is sent into the adjusting pool 102 for water quality homogenization after insoluble pollutants in the sewage are intercepted by the grating pool 101; the biochemical treatment unit 2 comprises an anoxic tank 201 and an aerobic tank 202 which are sequentially connected, the effluent of the regulating tank 102 is sent to the anoxic tank 201, a carbon source in sewage is consumed in the anoxic tank 201 to perform denitrification reaction, nitrate nitrogen and nitrite nitrogen in the water are removed, organic matters in the sewage can be removed, the treated sewage enters the aerobic tank 202 to perform nitrification reaction, ammonia nitrogen in the sewage is removed, and the organic matters in the sewage are further reduced. Part of the effluent from the aerobic tank 202 flows into the dephosphorization unit 3, and part flows into the anoxic tank 201 through the mixed liquor reflux device 205.
The utility model provides an electrochemical dephosphorization system for rural domestic sewage, wherein a dephosphorization unit 3 is connected with the water outlet end of an aerobic tank 202, and sewage enters the dephosphorization unit 3 for dephosphorization after denitrification by a biochemical treatment unit 2; the dephosphorization unit 3 comprises an electrochemical dephosphorization device 300, the electrochemical dephosphorization device 300 comprises a dephosphorization chamber 301 and a water outlet chamber 302, a water inlet pipe 303 is arranged on the left side wall of the dephosphorization chamber 301, the water inlet pipe 303 is communicated with water outlet of the aerobic tank 202 through a pipeline, a group of parallel electrode plates are further arranged in the dephosphorization chamber 301, the distance between the electrode plates is 1-4 cm, sewage can fully contact with the electrode plates in the dephosphorization chamber 301, and the sewage is continuously aerated in the dephosphorization chamber 301 and is baffled along the multipolar plates; an overflow groove 304 is arranged between the dephosphorization chamber 301 and the water outlet chamber 302, sewage overflows from the dephosphorization chamber 301 to the water outlet chamber 302 through the overflow groove 304, a water outlet pipe 305 is arranged on the right side wall of the water outlet chamber 302, and the water outlet pipe 305 is connected with the disinfection unit 4.
In the above embodiment, the electrode plates include an anode electrode plate 306, a cathode electrode plate 307 and an induction electrode plate 308, the electrode plates have equal and parallel intervals, and the plurality of electrode plates are alternately arranged anode-induction-cathode; the electricity-receiving anode electrode plate 306 and the induction electrode plate 308 are iron plates, and the electricity-receiving cathode electrode plate 307 is an aluminum plate; the electrode plates are connected in a clamping groove mode, sewage is aerated while being baffled along a multipolar plate in the dephosphorization chamber 301, and then overflows to the water outlet chamber 302 through the overflow groove 304. The reaction occurring in this process is that the anode electrode plate 306 is eroded to generate a large amount of fe2+, fe3+ and other ions, and under aeration conditions, a part of fe2+ is converted to fe3+ and then is developed into various polymer hydroxyl complexes and hydroxides through a series of hydrolysis, polymerization and ferrous oxidation processes. Meanwhile, PO23-, PO33-, P2O 74-plasmas in the sewage are oxidized into orthophosphate ions PO43-, and the Fe < 2+ >, fe < 3+ > and PO 43-react to generate indissolvable Fe < 3 > (PO 4) 2 and FePO4, so that phosphorus in the sewage is removed.
In some preferred embodiments, a return pipe 309 and a sludge discharge pipe 310 are arranged at the bottom of the dephosphorization chamber 301, the return pipe 309 is connected in parallel to the sludge discharge pipe 310, an evacuation pipe 311 is arranged at the bottom of the water outlet chamber 302, and the return pipe 309 is arranged at the bottom of the dephosphorization chamber 301 to return part of the residual sludge to the anoxic tank 201. An evacuation pipe is arranged at the bottom of the water outlet chamber 302, a water outlet pipe 305 is further arranged, sewage flows to the disinfection unit 4 through the water outlet pipe 305, the disinfection unit is internally provided with a dosing device 400, and sodium hypochlorite solution with a certain concentration is added into the water outlet chamber 302 through the disinfection unit 4, so that the water outlet reaches the standard.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (6)
1. An electrochemical dephosphorization system for domestic sewage in villages and towns is characterized in that: comprises a pretreatment unit (1), a biochemical treatment unit (2), a dephosphorization unit (3) and a disinfection unit (4) which are connected in sequence;
the pretreatment unit (1) comprises a grid pool (101) and an adjusting pool (102) which are connected in sequence;
the biochemical treatment unit (2) comprises an anoxic tank (201) and an aerobic tank (202) which are connected in sequence;
the dephosphorization unit (3) comprises an electrochemical dephosphorization device (300);
a coarse grid (103) is arranged at the inlet end of the grid pool (101), and a first aeration device (104) is arranged in the regulating pool (102);
the anaerobic treatment device is characterized in that a stirring device (203) is arranged in the anoxic tank (201), a second aeration device (204) is arranged in the aerobic tank (202), and a mixed liquid reflux device (205) is arranged between the aerobic tank (202) and the anoxic tank (201).
2. The electrochemical dephosphorization system for the domestic sewage of villages and towns according to claim 1, wherein: the electrochemical dephosphorization device (300) comprises a dephosphorization chamber (301) and a water outlet chamber (302), wherein a water inlet pipe (303) is arranged on the left side wall of the dephosphorization chamber (301), the water inlet pipe (303) is communicated with water outlet of the aerobic tank (202) through a pipeline, a group of parallel electrode plates are further arranged in the dephosphorization chamber (301), and sewage is continuously aerated in the dephosphorization chamber (301) and is baffled along the multipolar plates; an overflow groove (304) is arranged between the dephosphorization chamber (301) and the water outlet chamber (302), sewage overflows from the dephosphorization chamber (301) to the water outlet chamber (302) through the overflow groove (304), a water outlet pipe (305) is arranged on the right side wall of the water outlet chamber (302), and the water outlet pipe (305) is connected with the disinfection unit (4).
3. An electrochemical dephosphorization system for domestic sewage in villages and towns according to claim 2, wherein: the electrode plates comprise an electric anode electrode plate (306), an electric cathode electrode plate (307) and an induction electrode plate (308), the electrode plates are equal in interval and parallel, and the electrode plates are alternately arranged anode-induction-cathode; the electric anode electrode plate (306) and the induction electrode plate (308) are iron plates, and the electric cathode electrode plate (307) is an aluminum plate; the electrode plate is connected in a clamping groove mode.
4. An electrochemical dephosphorization system for domestic sewage in villages and towns according to claim 3, wherein: the electrode plate spacing of the electrochemical dephosphorization device (300) is 1-4 cm.
5. An electrochemical dephosphorization system for domestic sewage in villages and towns according to claim 2, wherein: a return pipe (309) and a sludge discharge pipe (310) are arranged at the bottom of the dephosphorization chamber (301), the return pipe (309) is connected in parallel with the sludge discharge pipe (310), and an emptying pipe (311) is arranged at the bottom of the water outlet chamber (302).
6. The electrochemical dephosphorization system for the domestic sewage of villages and towns according to claim 1, wherein: the mixed liquor reflux device (205) is a reflux pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321598654.XU CN220376518U (en) | 2023-06-21 | 2023-06-21 | Electrochemical dephosphorization system for domestic sewage of villages and towns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321598654.XU CN220376518U (en) | 2023-06-21 | 2023-06-21 | Electrochemical dephosphorization system for domestic sewage of villages and towns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220376518U true CN220376518U (en) | 2024-01-23 |
Family
ID=89572522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321598654.XU Active CN220376518U (en) | 2023-06-21 | 2023-06-21 | Electrochemical dephosphorization system for domestic sewage of villages and towns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220376518U (en) |
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2023
- 2023-06-21 CN CN202321598654.XU patent/CN220376518U/en active Active
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