CN220520236U - Device for denitrification and denitrification of sewage by utilizing electrochemistry - Google Patents
Device for denitrification and denitrification of sewage by utilizing electrochemistry Download PDFInfo
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- CN220520236U CN220520236U CN202322360176.5U CN202322360176U CN220520236U CN 220520236 U CN220520236 U CN 220520236U CN 202322360176 U CN202322360176 U CN 202322360176U CN 220520236 U CN220520236 U CN 220520236U
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- 239000010865 sewage Substances 0.000 title claims abstract description 22
- 230000005518 electrochemistry Effects 0.000 title claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000010935 stainless steel Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000002351 wastewater Substances 0.000 claims description 14
- 229910002651 NO3 Inorganic materials 0.000 claims description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 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 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model provides a device for denitrification and denitrification of sewage by utilizing electrochemistry, which relates to the field of electrolysis and comprises the following components: the electrolytic cell is internally provided with a proton exchange membrane for dividing the electrolytic cell into a cathode cell and an anode cell, a cathode module and an anode module are correspondingly arranged in the cathode cell and the anode cell, and the anode module comprises stainless steel sheets and graphite plates clamped between the stainless steel sheets; the utility model provides a cathode module is including rotating the integral type end cover that sets up at the electrolytic cell, integral type end cover is provided with center post and cathode post, the cathode collar is established on integral type end cover, center post setting is at the center of integral type end cover, wear to be equipped with at least one cathode unit on center post and the cathode post, the cathode unit includes clamp structure, catalyst layer and enrichment material layer, clamp structure presss from both sides the catalyst layer and establishes in enrichment material layer both sides, this application utilizes the principle of cathode reduction, the utilization of coupling new energy storage technology, realize low cost, high efficiency, long-life sewage denitrogenation.
Description
Technical Field
The utility model relates to the field of electrolysis, in particular to a device for denitrification and denitrification of sewage by using electrochemistry.
Background
The utilization of a large amount of nitrogen-containing compounds in industry and agriculture causes the problem of nitrogen pollution of overground watershed water and underground water resources. The sewage rich in nitrate nitrogen is discharged into a natural water circulation system, and the ecological natural environment and the life health safety of human beings are seriously affected.
The existing wastewater treatment denitrification technology has the advantages that the anaerobic ammonia oxidation technology is combined with the microbial denitrification method, so that the nitrogen pollution load of the receiving water body can be greatly reduced, the water quality of the receiving water body is improved, and the autotrophic denitrification and denitrification coupled biogas synchronous desulfurization technology also appears in the aspect of reducing the operation cost. However, these techniques are limited in terms of region and time: the equipment construction period is long, the occupied area is large, and the process circulation time is long. And the conditions that the carbon source is insufficient and the additional carbon source is needed easily occur, which causes the problems of high cost investment, incapability of continuous operation of the system, reduced working efficiency and the like. Meanwhile, the technology has poor adaptability to wastewater with wider nitrogen concentration range: the denitrification effect of the process limited by the upper limit of the system when the high-concentration wastewater is faced, so that the effluent quality does not reach the standard; the problem of incomplete deep denitrification is easy to occur when the wastewater with low concentration is faced.
The combination of electrochemistry and biological methods has been proposed to solve the problems in sewage denitrification, but the core idea is to use byproducts generated by anodic oxidation of an electrolytic cell as a carbon source of denitrifying bacteria, and the technology has high dependence on waste water types, poor wide applicability and still faces the problems of time and energy cost increase caused by the need of adding the carbon source. Along with the perfection of denitrification catalyst research and the large-scale development and utilization of new energy in recent years, materials and energy supports are provided for electrochemical sewage denitrification, a new energy storage technology is coupled, nitrate is removed by utilizing the cathode reduction of an electrolytic cell, and sewage denitrification is realized, so that the method is a more green and efficient method technology.
Disclosure of Invention
The utility model provides a device for denitrification and denitrification of sewage by using electrochemistry, which aims to provide a novel denitrification mode, has good applicability, and can remove nitrate in water to realize the aim of denitrification and denitrification.
In order to achieve the above object, an embodiment of the present utility model provides a device for denitrification of sewage by electrochemical, an electrolytic cell, in which a proton exchange membrane is disposed, the proton exchange membrane dividing the electrolytic cell into a cathode cell and an anode cell;
the cathode module and the anode module are correspondingly arranged in the cathode pool and the anode pool, and the anode module comprises stainless steel sheets and graphite plates clamped between the stainless steel sheets;
the cathode module comprises an integral end cover rotatably arranged on the electrolytic cell, a center column and a cathode column are arranged on one face of the integral end cover, facing the anode cell, of the integral end cover, the cathode column is arranged on the integral end cover in a ring mode, the center column and the cathode column are stainless steel columns, at least one cathode unit is arranged on the center column and the cathode column in a penetrating mode, the cathode unit comprises a clamping structure, a catalyst layer and an enrichment material layer, and the catalyst layer is clamped on two sides of the enrichment material layer through the clamping structure.
Preferably, the cathode unit further comprises an auxiliary conductive rod, the auxiliary conductive rod penetrates through the clamping structure, the catalyst layer and the enrichment material layer, and the auxiliary conductive rod is a graphite rod.
Preferably, the clamping structure is a porous stainless steel plate, which is fixed on the cathode column by a nut.
Preferably, the device for performing denitrification and denitrification of sewage by using electrochemistry further comprises a motor, wherein the motor is arranged at one end of the electrolytic cell close to the cathode cell, and the motor drives the integrated end cover to rotate;
and a flushing nozzle is further arranged above the electrolytic cell, and the flushing nozzle is positioned above the cathode module and used for cleaning the cathode module.
Preferably, the electrolytic cell is further provided with a water inlet and a water outlet, the water inlet and the water outlet are both arranged in the cathode cell, and the water inlet and the water outlet are provided with first valves.
Preferably, the electrolytic cell is further provided with an exhaust port, the exhaust port is arranged in the cathode cell, and a second valve is arranged at the exhaust port;
a drain outlet is also arranged in the cathode pool, and a third valve is arranged at the drain outlet.
Preferably, the anode module and the cathode module are further correspondingly provided with an anode port and a cathode port for connecting an external power supply, the anode port is arranged on the stainless steel sheet, and the cathode port is arranged on the cathode column.
Preferably, the catalyst layer is made of a solid conductive catalyst, and the enriched material layer is made of a material capable of aggregating nitrate
The scheme of the utility model has the following beneficial effects:
according to the method, the principle of cathode reduction is utilized, the good removal effect of the catalyst on nitrate and the good nitrogen selectivity are relied on, and the utilization of a new energy storage technology is coupled, so that the sewage denitrification with low cost, high efficiency and long service life is realized. Meanwhile, the dosage of the catalyst, the magnitude of the loading current and the loading voltage and the magnitude of the sewage residence time can be adjusted according to the field conditions in the electrolysis process, so that the sewage denitrification effect is ensured.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
FIG. 1 is an overall schematic of the present utility model;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a schematic view of a cathode unit;
fig. 4 is a left side view of fig. 3.
[ reference numerals description ]
2-proton exchange membrane, 3-cathode pool, 4-anode pool,
5-anode module, 6-cathode module;
61-integral end cap, 62-center post, 63-cathode post, 64-cathode unit, 641-clamping structure, 642-catalyst layer, 643-rich material layer, 644-auxiliary conductive rod,
7-flushing nozzle, 8-water inlet and 9-water outlet.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, an embodiment of the present utility model provides an apparatus for denitrification of sewage by electrochemical, comprising an electrolytic cell, in which a proton exchange membrane 2 is disposed, the proton exchange membrane 2 dividing the electrolytic cell into a cathode cell 3 and an anode cell 4; an anode module 5 is arranged in the anode tank 4, a cathode module 6 is arranged in the cathode tank 3, and the cathode module 6 and the anode module 5 electrolyze sewage. The anode module 5 includes stainless steel sheets and graphite plates sandwiched between the stainless steel sheets. The cathode module 6 includes an integral end cover 61, the integral end cover 61 is rotatably disposed in the cathode cell 3, and a center post 62 and a cathode post 63 are disposed on one surface of the integral end cover 61 facing the anode cell 4, and a plurality of cathode posts 63 are annularly disposed on the integral end cover 61, and the center post 62 is disposed at the center of the integral end cover 61. The center post 62 and the cathode post 63 are stainless steel posts, and at least one cathode unit 64 is detachably arranged on the center distance and the cathode post 63 in a penetrating manner, the cathode unit 64 comprises a clamping structure 641, a catalyst layer 642 and an enrichment material layer 643, and the catalyst layer 642 is clamped on two sides of the enrichment material layer 643 by the clamping structure 641. The catalyst layer 642 is made of a solid conductive catalyst. The layer of enrichment material 643 is made of a material that can aggregate nitrate, such as activated carbon, iron oxide, aluminum oxide.
Further, the cathode unit 64 further includes an auxiliary conductive rod 644, and the auxiliary conductive rod 644 penetrates through the cathode unit 64 to fix the clamping structure 641, the catalyst layer 642 and the enrichment material layer 643. The auxiliary conductive rod 644 is made of graphite.
The clamping structure 641 is a porous stainless steel plate fixed to the cathode column 63 by nuts.
Further, the device for performing denitrification and denitrification of sewage by using electrochemistry further comprises a motor, wherein the motor is in transmission connection with the integrated end cover 61, and the integrated end cover 61 rotates under the drive of the motor. Preferably, the motor is disposed at one end of the cathode cell 3. Above the cathode cell 3 there is also a rinsing nozzle 7, which rinsing nozzle 7 is located above the cathode unit 64, which rinsing nozzle 7 can be used for cleaning the cathode unit 64. Preferably, the number of the shower nozzles 7 is the same as the number of the cathode units 64.
Preferably, the electrolytic cell is also provided with a water inlet 8 and a water outlet 9, the water inlet 8 and the water outlet 9 are both arranged in the cathode cell 3, and a first valve is arranged at the water inlet 8 and the water outlet 9. The electrolytic cell is also provided with an exhaust port which is arranged in the cathode cell 3, and a second valve is arranged at the exhaust port. A drain outlet is also arranged in the cathode pool 3, and a third valve is arranged at the drain outlet.
The cathode module 6 and the anode module 5 are also correspondingly provided with a negative electrode port and a positive electrode port, the positive electrode port is arranged on the stainless steel sheet, and the negative electrode port is arranged on the cathode column 63. The positive electrode port and the negative electrode port are used for being connected with an external power supply to supply power for electrolysis.
In this application, the anode module 5 is externally connected with the positive electrode of the circuit, the cathode module 6 is externally connected with the negative electrode of the circuit, the wastewater of the welding nitrate nitrogen flows in through the water inlet 8, the nitrate nitrogen is electrochemically reduced into nitrogen gas under the action of the catalyst layer 642, the nitrogen gas is discharged from the air outlet, and the wastewater after denitrification is discharged from the water outlet 9. When the cathode module 6 needs to be cleaned, the motor drives the cathode module 6 to rotate, dirt accumulated on the cathode module 6 is flushed clean under the action of the flushing nozzle 7, and the dirt flows out of the electrolytic cell through the sewage outlet, so that the catalyst layer 642 is recycled.
In addition, the cathode unit 64 on the integrated end cap 61 may be provided with at least one according to the size of the site or the efficiency of electrolysis, ensuring the efficiency of electrolysis and the degree of electrolysis. The cathode column 63 is a stainless steel column and serves to support the cathode unit 64. Meanwhile, the cathode columns 63 can be connected with the cathode units 64 in series to realize the electrical series connection of the cathode units 64 by an external circuit.
The sandwiched catalyst layer 642 is a solid conductive catalyst, has good adsorption capacity to nitrate pollutants, and can reduce nitrate to nitrogen under the cathode reduction condition; the layer 643 has a certain adsorption capacity for nitrate under cathodic potential.
The auxiliary conductive rod plays a role in electrically connecting the auxiliary cathode unit 64, so that the problem that the electrolysis cannot be realized due to the fact that the partial cathode unit 64 cannot conduct electricity because of poor contact is avoided.
The first valve and the second valve control the electrolysis time of the sewage in the electrolytic cell, so that the residence time of the sewage in the electrolytic cell can be conveniently regulated and controlled.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (8)
1. An apparatus for denitrification of wastewater by means of electrochemistry, comprising: the electrolytic cell is internally provided with a proton exchange membrane (2), and the proton exchange membrane (2) divides the electrolytic cell into a cathode cell (3) and an anode cell (4);
the cathode module (6) and the anode module (5) are correspondingly arranged in the cathode tank (3) and the anode tank (4), and the anode module (5) comprises stainless steel sheets and graphite plates clamped between the stainless steel sheets;
the cathode module (6) is including rotating integral type end cover (61) that sets up at the electrolytic cell, and one side of integral type end cover (61) towards positive pole pond (4) is provided with center post (62) and cathode post (63), cathode post (63) ring is established on integral type end cover (61), center post (62) set up the center at integral type end cover (61), center post (62) and cathode post (63) are the stainless steel column, wear to be equipped with at least one cathode unit (64) on center post (62) and cathode post (63), cathode unit (64) are including clamp structure (641), catalyst layer (642) and enrichment material layer (643), clamp structure (641) presss from both sides catalyst layer (642) in enrichment material layer (643) both sides.
2. The apparatus for denitrification of wastewater by electrochemical means according to claim 1, wherein: the cathode unit (64) further comprises an auxiliary conducting rod (644), the auxiliary conducting rod (644) penetrates through the clamping structure (641), the catalyst layer (642) and the enrichment material layer (643), and the auxiliary conducting rod (644) is a graphite rod.
3. The apparatus for denitrification of wastewater by electrochemical means according to claim 1 or 2, wherein: the clamping structure (641) is a porous stainless steel plate which is fixed on the cathode column (63) through a nut.
4. The apparatus for denitrification of wastewater by electrochemical means according to claim 3, wherein: the device for carrying out sewage denitrification by utilizing electrochemistry further comprises a motor, wherein the motor is arranged at one end of the electrolytic cell close to the cathode cell (3), and drives the integrated end cover (61) to rotate;
and a flushing nozzle (7) is further arranged above the electrolytic cell, and the flushing nozzle (7) is positioned above the cathode module (6) and is used for cleaning the cathode module (6).
5. The apparatus for denitrification of wastewater by electrochemical means according to claim 4, wherein: the electrolytic cell is further provided with a water inlet (8) and a water outlet (9), the water inlet (8) and the water outlet (9) are both arranged in the cathode cell (3), and a first valve is arranged at the positions of the water inlet (8) and the water outlet (9).
6. The apparatus for denitrification of wastewater by electrochemical means according to claim 5, wherein: the electrolytic cell is also provided with an exhaust port, the exhaust port is arranged in the cathode cell (3), and a second valve is arranged at the exhaust port;
a drain outlet is also arranged in the cathode pool (3), and a third valve is arranged at the drain outlet.
7. The apparatus for denitrification of wastewater by electrochemical means according to claim 1, wherein: the anode module (5) and the cathode module (6) are correspondingly provided with an anode port and a cathode port for connecting an external power supply, the anode port is arranged on a stainless steel sheet, and the cathode port is arranged on the cathode column (63).
8. The apparatus for denitrification of wastewater by electrochemical means according to claim 1, wherein: the catalyst layer (642) is made of a solid conductive catalyst and the enrichment material layer (643) is made of a material that can aggregate nitrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360176.5U CN220520236U (en) | 2023-08-31 | 2023-08-31 | Device for denitrification and denitrification of sewage by utilizing electrochemistry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360176.5U CN220520236U (en) | 2023-08-31 | 2023-08-31 | Device for denitrification and denitrification of sewage by utilizing electrochemistry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220520236U true CN220520236U (en) | 2024-02-23 |
Family
ID=89938612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322360176.5U Active CN220520236U (en) | 2023-08-31 | 2023-08-31 | Device for denitrification and denitrification of sewage by utilizing electrochemistry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220520236U (en) |
-
2023
- 2023-08-31 CN CN202322360176.5U patent/CN220520236U/en active Active
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