CN221662690U - Pretreatment device for coal chemical wastewater - Google Patents
Pretreatment device for coal chemical wastewater Download PDFInfo
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- CN221662690U CN221662690U CN202323636780.2U CN202323636780U CN221662690U CN 221662690 U CN221662690 U CN 221662690U CN 202323636780 U CN202323636780 U CN 202323636780U CN 221662690 U CN221662690 U CN 221662690U
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- fixedly connected
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- tank
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- 239000000126 substance Substances 0.000 title claims abstract description 30
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 239000010865 sewage Substances 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000001556 precipitation Methods 0.000 claims abstract description 15
- 238000012377 drug delivery Methods 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 abstract description 14
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003651 drinking water Substances 0.000 abstract 2
- 235000020188 drinking water Nutrition 0.000 abstract 2
- 239000003814 drug Substances 0.000 description 19
- 229940079593 drug Drugs 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001647 drug administration Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model provides a pretreatment device for coal chemical wastewater, and relates to the technical field of coal chemical industry. Including the treatment tank, one side is provided with the sedimentation tank in the treatment tank, be provided with pretreatment mechanism in the treatment tank, pretreatment mechanism is including setting up mechanism's groove and the filter vat in sedimentation tank one side, be provided with the baffle between the filter vat, and fixedly embedded the filter screen on the baffle, the filter vat is connected with blowdown subassembly, the top rigid coupling of mechanism's groove has the sewage pump, the play water end of sewage pump is connected with the blow off pipe, the water inlet end is connected with the drinking-water pipe, the drinking-water pipe includes port one, port one is connected with the subassembly of dosing. According to the utility model, through the arrangement of the pretreatment mechanism, the precipitation effect and the precipitation efficiency are improved.
Description
Technical Field
The utility model provides a pretreatment device for coal chemical wastewater, and relates to the technical field of coal chemical industry.
Background
The coal chemical wastewater is a common name of wastewater from each link in the coking process of a coal chemical plant and mainly comprises a coal pyrolysis and carbonization stage, a raw gas recovery and purification stage and a chemical product recovery and purification stage. The main emission sources of the wastewater are as follows: ① Residual ammonia water waste liquid generated by high-temperature pyrolysis of coal and cooling of raw gas: the waste water is a main discharge source of waste water in a coal chemical plant, and accounts for more than half of the discharge amount of waste water in the whole plant. The sewage has complex water quality, the mass concentration of phenol is 600-1200 mg/L, the Chemical Oxygen Demand (COD) is about 3000mg/L, and the mass concentration of NH3 is 200-300 mg/L; ② Final cooling circulation sewage of coal gas: when the final cooling of the gas is carried out, a certain amount of phenol, cyanide, sulfide and the like in the gas enter cooling water, and the final cooling circulating water part is replaced by new water, so that a certain amount of sewage containing phenol and cyanide is discharged, and a small amount of sulfide exists; ③ Separating water from chemical products: condensed water and chemical products sedimentation separation products in the rough and refining processing process of chemical products, and sewage discharged by various storage tanks at regular intervals; ④ And (3) running, overflowing, dripping and leaking sewage generated in the chemical production workshop. The coal chemical industry wastewater contains multiple and complex components, contains a large amount of aromatic high-concentration refractory organic pollutants and inorganic salt pollutants such as sulfur, nitrogen, phosphorus and the like, has high concentration and chromaticity and extremely high toxicity, not only seriously pollutes the environment, but also causes great harm to human health and animal and plant growth.
The existing sewage pretreatment method is usually to pretreat the sewage by a precipitation method, and the chemical agent is added into a pipeline to carry out mixed precipitation on the sewage, but the chemical agent is insufficiently mixed with water, so that the precipitation effect is not ideal, and the precipitation time is long.
Disclosure of utility model
In order to solve the problems, the utility model provides a pretreatment device for coal chemical wastewater, which improves the precipitation effect and the precipitation efficiency through the arrangement of a pretreatment mechanism.
The utility model provides a pretreatment device for coal chemical wastewater, which comprises a treatment tank, wherein a sedimentation tank is arranged on one side in the treatment tank, a pretreatment mechanism is arranged in the treatment tank, the pretreatment mechanism comprises a mechanism groove and a filter groove which are arranged on one side of the sedimentation tank, a partition plate is arranged between the filter grooves, a filter screen is fixedly embedded on the partition plate, the filter groove is connected with a sewage discharging assembly, the top of the mechanism groove is fixedly connected with a sewage pump, the water outlet end of the sewage pump is connected with a sewage discharging pipe, the water inlet end of the sewage pump is connected with a water suction pipe, the water suction pipe comprises a port I, the port I is connected with a dosing assembly, the dosing assembly comprises a screw cap in threaded connection with the port I, a dosing pipe fixedly connected with the screw cap, and an annular pipe fixedly connected with the bottom end of the dosing pipe, the dosing pipe downwards extends into the water suction pipe, the side wall of the dosing pipe is fixedly connected with fan blades, and the side wall of the annular pipe is uniformly provided with drug outlet holes.
Preferably, the administration component further comprises a support fixedly connected to the top of the screw cap, a rotary joint fixedly connected to the support, and an external connection tube connected to the top end of the rotary joint, wherein the administration tube is connected and communicated to the bottom end of the rotary joint, a first gear is coaxially fixedly connected to the administration tube, a second gear is meshed with the first gear, and a second motor connected with the second gear is fixedly connected to the screw cap.
Preferably, the blowdown subassembly is including setting up the scraper blade inboard at the filter vat, scraper blade top rigid coupling has the diaphragm, processing pond one side rigid coupling has fixed plate one, opposite side rigid coupling has fixed plate two, and rotates between fixed plate two and the fixed plate one and be connected with lead screw and guide arm, lead screw and guide arm all run through the diaphragm and with diaphragm sliding connection, fixed plate one top rigid coupling has motor one, the output shaft of motor one runs through the fixed plate downwards and coaxial rigid coupling has the worm in the lump, the worm meshing has the worm wheel, worm wheel and the coaxial rigid coupling of lead screw, the drain has all been opened to the both sides of filter vat, the drain is connected with sealed lid.
Preferably, the water pumping pipe further comprises a second port and a third port, wherein the second port is connected with the water inlet end of the sewage pump, and the third port is connected with the adjacent filter tank.
Preferably, the partition board is provided with three, and the pore diameter of the filter screen gradually decreases along the water flow direction.
Preferably, both sides of the scraping plate are fixedly connected with limiting blocks, and the side wall of the filter tank is provided with a chute matched with the limiting blocks.
The utility model has the beneficial effects that:
The utility model provides a pretreatment device for coal chemical wastewater, which is characterized in that solid impurities in the wastewater are removed through a filter tank before the wastewater is precipitated through the arrangement of a pretreatment mechanism, substances to be precipitated subsequently are reduced, and then a drug delivery assembly is used for fully mixing a drug and the wastewater before the wastewater enters a precipitation tank, so that the effect of subsequent precipitation is ensured, the time required for precipitation is reduced, and the wastewater treatment efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the whole structure of a pretreatment device for coal chemical wastewater.
FIG. 2 is a schematic diagram of a treatment tank structure of a pretreatment device for coal chemical wastewater.
FIG. 3 is a rear view of a removal treatment tank of a pretreatment device for coal chemical wastewater according to the present utility model.
FIG. 4 is an enlarged view of the A position of the pretreatment device for the coal chemical wastewater.
FIG. 5 is an enlarged view of the position B of the pretreatment device for coal chemical wastewater.
( 1. A treatment pool; 2. a cross plate; 3. a scraper; 4. a first motor; 5. a first fixing plate; 6. a screw rod; 7. a guide rod; 8. a mechanism groove; 9. a sewage pump; 10. a precipitation tank; 11. a blow-down pipe; 12. sealing cover; 13. a filter tank; 14. a partition plate; 15. a filter screen; 16. a chute; 17. a sewage outlet; 18. a worm; 19. a worm wheel; 20. a limiting block; 21. a second fixing plate; 22. a water pumping pipe; 23. a first port; 24. a second port; 25. a drug administration tube; 26. a fan blade; 27. a bracket; 28. a screw cap; 29. an outer connecting pipe; 30. a rotary joint; 31. a first gear; 32. a second gear; 33. a second motor; 34. an annular tube; 35. a medicine outlet hole; 36. port three )
Detailed Description
Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 5, the utility model provides a pretreatment device for coal chemical wastewater, which comprises a treatment tank 1, wherein a sedimentation tank 10 is arranged on one side in the treatment tank 1, a pretreatment mechanism is arranged in the treatment tank 1, the pretreatment mechanism comprises a mechanism tank 8 and a filter tank 13 which are arranged on one side of the sedimentation tank 10, a partition plate 14 is arranged between the filter tanks 13, a filter screen 15 is fixedly embedded on the partition plate 14, three partition plates 14 are arranged, and the aperture of the filter screen 15 gradually decreases along the water flow direction. Specifically, sewage is discharged into the treatment tank 1 from the leftmost filter tank 13, and then is filtered by three filter screens 15 in turn rightward, so that most solid impurities in the sewage are trapped, and the subsequent impurity amount required to be deposited is reduced.
Further, as shown in fig. 3, the filter tank 13 is connected with a sewage disposal component, the sewage disposal component comprises a scraper 3 arranged on the inner side of the filter tank 13, a transverse plate 2 is fixedly connected to the top of the scraper 3, a first fixed plate 5 is fixedly connected to one side of the treatment tank 1, a second fixed plate 21 is fixedly connected to the other side of the treatment tank, a lead screw 6 and a guide rod 7 are rotatably connected between the second fixed plate 21 and the first fixed plate 5, the lead screw 6 and the guide rod 7 penetrate through the transverse plate 2 and are in sliding connection with the transverse plate 2, a first motor 4 is fixedly connected to the top of the first fixed plate 5, an output shaft of the first motor 4 penetrates through the first fixed plate 5 downwards and is coaxially fixedly connected with a worm 18, the worm 18 is meshed with a worm wheel 19, the worm wheel 19 is coaxially fixedly connected with the lead screw 6, two sides of the filter tank 13 are respectively provided with a sewage disposal outlet 17, and the sewage disposal outlet 17 is connected with a sealing cover 12. Specifically, after sewage treatment, solid waste which is trapped can remain in the filter tank 13, at the moment, the sealing cover 12 is opened, the first motor 4 is started, the worm 18 is driven to rotate, the worm 18 drives the worm wheel 19 to rotate, the worm wheel 19 drives the lead screw 6 to rotate, the lead screw 6 drives the transverse plate 2 to axially move along the lead screw 6, the transverse plate 2 drives the scraping plate 3 to move, the scraping plate 3 scrapes the waste residue in the filter tank 13 towards the sewage outlet 17, most of the waste residue can be rapidly discharged from the sewage outlet 17, and cleaning work is convenient to carry out.
Further, as shown in fig. 2 and 3, in the present utility model, the two sides of the scraper 3 are fixedly connected with a limiting block 20, and the side wall of the filter tank 13 is provided with a chute 16 matched with the limiting block 20. Specifically, the movement of the scraping plate 3 is limited by the arrangement of the limiting block 20 and the sliding groove 16, so that the scraping plate 3 moves more stably.
Further, in the utility model, the top of the mechanism groove 8 is fixedly connected with the sewage pump 9, the water outlet end of the sewage pump 9 is connected with the sewage pipe 11, the water inlet end is connected with the water pumping pipe 22, the sewage pipe 11 stretches into the sedimentation groove 10, the water pumping pipe 22 comprises a first port 23, a second port 24 and a third port 36, the second port 24 is connected with the water inlet end of the sewage pump 9, the third port 36 is connected with the adjacent filter groove 13, the first port 23 is connected with the dosing assembly, specifically, the filtered sewage can be pumped into the sedimentation groove 10 for sedimentation through the sewage pump 9, and in the water pumping process, the dosing assembly mixes the medicament into the sewage, so that the sewage and the medicament are uniformly mixed.
Further, as shown in fig. 3, 4 and 5, the drug delivery assembly in the present utility model includes a screw cap 28 screwed on the first port 23, a drug delivery tube 25 rotatably connected to the screw cap 28, an annular tube 34 fixedly connected to the bottom end of the drug delivery tube 25, the drug delivery tube 25 extends downward into the pumping tube 22, the side wall of the drug delivery tube 25 is fixedly connected with a fan blade 26, the side wall of the annular tube 34 is uniformly provided with a drug outlet hole 35, the drug delivery assembly further includes a bracket 27 fixedly connected to the top of the screw cap 28, a rotary joint 30 fixedly connected to the bracket 27, and an external connection tube 29 connected to the top end of the rotary joint 30, the drug delivery tube 25 is connected to the bottom end of the rotary joint 30, a first gear 31 is coaxially fixedly connected to the drug delivery tube 25, the first gear 31 is meshed with a second gear 32, and a second motor 33 connected to the second gear 32 is fixedly connected to the screw cap 28. Specifically, the second motor 33 is started, the second motor 33 drives the second gear 32 to rotate, the second gear 32 drives the first gear 31 to rotate, the first gear 31 drives the drug delivery pipe 25 to rotate, the external connecting pipe 29 is connected with an external drug delivery system, so that a drug enters the drug delivery pipe 25 through the external connecting pipe 29 and the rotary joint 30 and is sprayed out from the drug outlet 35 on the annular pipe 34, sewage in the pumping pipe 22 flows from bottom to top, after the drug is sprayed out, the drug flows upwards along with water flow, meanwhile, the drug delivery pipe 25 also drives the fan blades 26 to rotate, the fan blades 26 agitate the sewage, the drug and the sewage are uniformly mixed in the flowing process, and finally the drug enters the precipitation tank 10 from the sewage discharge pipe 11.
Working principle: when the utility model is used, sewage is discharged into the treatment tank 1 from the leftmost filtering tank 13, then is filtered by the three filtering screens 15 to the right in sequence, most solid impurities in the sewage are trapped, the sewage pump 9 is started, the filtered sewage is pumped into the sedimentation tank 10 for sedimentation, meanwhile, the motor II 33 is started to drive the drug delivery pipe 25 to rotate, the outer connecting pipe 29 is connected with an external drug delivery system, so that the drug enters the drug delivery pipe 25, finally, the drug is sprayed out from the drug outlet holes 35 on the annular pipe 34, and when the drug flows upwards along with water flow, the drug delivery pipe 25 drives the fan blades 26 to rotate, the sewage is stirred, the drug and the sewage are uniformly mixed in the process, and finally, the drug enters the sedimentation tank 10 from the sewage discharge pipe 11. Through the setting of pretreatment mechanism, before sewage carries out the sediment, filter first most solid impurity, mix the medicament even in sewage again, be favorable to carrying out fast of sediment work, have better sedimentation effect.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (6)
1. The utility model provides a pretreatment device of coal industry sewage, includes the treatment tank, one side is provided with the precipitation tank in the treatment tank, its characterized in that: the pretreatment device comprises a treatment tank, wherein a pretreatment mechanism is arranged in the treatment tank, the pretreatment mechanism comprises a mechanism groove and a filter groove which are arranged on one side of a precipitation tank, a partition plate is arranged between the filter grooves, a filter screen is fixedly embedded on the partition plate, the filter groove is connected with a sewage discharging component, the top of the mechanism groove is fixedly connected with a sewage pump, the water outlet end of the sewage pump is connected with a sewage discharging pipe, the water inlet end of the sewage pump is connected with a water suction pipe, the water suction pipe comprises a port I, the port I is connected with a dosing component, the dosing component comprises a thread cover in the port I, a dosing pipe rotationally connected with the thread cover and an annular pipe fixedly connected with the bottom end of the dosing pipe, the dosing pipe downwards extends into the water suction pipe, the side wall of the dosing pipe is fixedly connected with fan blades, and the side wall of the annular pipe is uniformly provided with dosing holes.
2. The pretreatment device for coal chemical wastewater according to claim 1, wherein: the drug delivery assembly further comprises a support fixedly connected to the top of the threaded cover, a rotary joint fixedly connected to the support and an external connection tube connected to the top end of the rotary joint, the drug delivery tube is connected and communicated to the bottom end of the rotary joint, a first gear is coaxially fixedly connected to the drug delivery tube, a second gear is meshed with the first gear, and a second motor connected with the second gear is fixedly connected to the threaded cover.
3. The pretreatment device for coal chemical wastewater according to claim 1, wherein: the sewage disposal assembly comprises a scraper plate arranged on the inner side of the filter tank, wherein the top of the scraper plate is fixedly connected with a transverse plate, one side of the treatment tank is fixedly connected with a first fixed plate, the other side of the treatment tank is fixedly connected with a second fixed plate, a screw rod and a guide rod are rotationally connected between the second fixed plate and the first fixed plate, the screw rod and the guide rod penetrate through the transverse plate and are in sliding connection with the transverse plate, the top of the first fixed plate is fixedly connected with a first motor, an output shaft of the first motor downwards penetrates through the fixed plate and is coaxially fixedly connected with a worm, the worm is meshed with a worm wheel, the worm wheel is coaxially fixedly connected with the screw rod, sewage disposal outlets are formed in two sides of the filter tank, and the sewage disposal outlets are connected with sealing covers.
4. The pretreatment device for coal chemical wastewater according to claim 1, wherein: the water pumping pipe further comprises a second port and a third port, wherein the second port is connected with the water inlet end of the sewage pump, and the third port is connected with the adjacent filter tank.
5. The pretreatment device for coal chemical wastewater according to claim 1, wherein: the baffle is provided with three, the aperture of filter screen reduces along the water flow direction gradually.
6. A pretreatment device for coal chemical wastewater according to claim 3, wherein: limiting blocks are fixedly connected to two sides of the scraping plate, and sliding grooves matched with the limiting blocks are formed in the side walls of the filtering grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323636780.2U CN221662690U (en) | 2023-12-29 | 2023-12-29 | Pretreatment device for coal chemical wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323636780.2U CN221662690U (en) | 2023-12-29 | 2023-12-29 | Pretreatment device for coal chemical wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221662690U true CN221662690U (en) | 2024-09-06 |
Family
ID=92573608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323636780.2U Active CN221662690U (en) | 2023-12-29 | 2023-12-29 | Pretreatment device for coal chemical wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221662690U (en) |
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2023
- 2023-12-29 CN CN202323636780.2U patent/CN221662690U/en active Active
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