CN109173428B - Multistage filtering sewage treatment device - Google Patents
Multistage filtering sewage treatment device Download PDFInfo
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- CN109173428B CN109173428B CN201811297903.5A CN201811297903A CN109173428B CN 109173428 B CN109173428 B CN 109173428B CN 201811297903 A CN201811297903 A CN 201811297903A CN 109173428 B CN109173428 B CN 109173428B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
Abstract
The invention discloses a sewage treatment device with multi-stage filtration, which comprises a filtration box body and a support frame positioned at the bottom of the filtration box body, wherein a coarse filtration chamber and a fine filtration chamber are sequentially arranged in the filtration box body along the height direction of the filtration box body, a coarse filtration device and a cleaning device are respectively arranged in the coarse filtration chamber, a fine filtration device is arranged in the fine filtration chamber, the coarse filtration device and the fine filtration device can effectively filter various impurities in domestic sewage, the cleaning device can automatically clean the impurities on a coarse filtration screen, an electric interface is arranged on one side of the bottom of the filtration box body, a controller is arranged on one side of the filtration box body, and the signal output end of the controller is respectively and electrically connected with the signal input ends of a first rotating motor, a linear motor and a second rotating motor. The invention has the advantages of simple structure and strong practicability.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment device with multi-stage filtration.
Background
Domestic sewage is wastewater discharged in daily life of residents and mainly comes from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprise toilets and the like. The pollutants contained in the domestic sewage are mainly organic matters (such as protein, carbohydrate, fat, urea, ammonia nitrogen and the like) and a large amount of pathogenic microorganisms (such as parasitic ova, enteroinfectious viruses and the like). Organic matters existing in domestic sewage are extremely unstable and easily decomposed to generate offensive odor. Bacteria and pathogens propagate in large quantities by taking organic matters in domestic sewage as nutrition, and can cause epidemic of infectious diseases. Therefore, domestic sewage must be treated before being discharged.
In the prior art, for example, patent No. CN 201721277844.6 discloses a sewage filter, which includes a tank body, a filtering bin and a sewage discharging bin located below the filtering bin and communicated with the filtering bin are disposed in the tank body, a water inlet and a water outlet communicated with the filtering bin are disposed on a side wall of the tank body, a sewage discharge outlet communicated with the sewage discharging bin is disposed at a bottom end of the tank body, a filter cartridge is disposed in the filtering bin, a driving device is fixedly disposed above the tank body, the driving device is connected with a transmission shaft, a scraper is disposed on the transmission shaft, and is attached to an inner wall of the filter cartridge, wherein a plurality of ceramic bumps are disposed on a surface of the scraper, which is close to the filter cartridge, and the filter cartridge. The deposit degree that can automatic identification impurity drives the transmission shaft through drive arrangement and makes rotary motion to drive the scraper blade and strike off the action to the impurity on straining a section of thick bamboo's the inner wall, and discharge impurity from the drain, the cleaning performance is good.
Contain a large amount of different kinds of impurity among the domestic sewage, the sewage filter equipment filter effect who uses at present is not thorough, can not effectively filter the various impurity in the sewage, and wastes time and energy when the filter clearance, can not satisfy the market demand.
Disclosure of Invention
The invention aims to solve the problems and designs a multi-stage filtering sewage treatment device.
The technical scheme of the invention is that the sewage treatment device with multi-stage filtration comprises a filtering box body and a supporting frame positioned at the bottom of the filtering box body, wherein a coarse filtering chamber and a fine filtering chamber are sequentially arranged in the filtering box body along the height of the filtering box body downwards, a coarse filtering device and a cleaning device are respectively arranged in the coarse filtering chamber, a fine filtering device is arranged in the fine filtering chamber, the coarse filtering device and the fine filtering device can effectively filter various impurities in domestic sewage, the cleaning device can automatically clean the impurities on the coarse filtering screen, an electric interface is arranged on one side of the bottom of the filtering box body, a controller is arranged on one side of the filtering box body, and signal output ends of the controller are respectively and electrically connected with signal input ends of a first rotating motor, a linear motor and a second rotating motor.
The coarse filtering device comprises a water inlet which is formed in the center of the upper surface of the filtering box body, a water inlet pipeline is fixedly inserted in the water inlet, and a water inlet control valve is installed on the water inlet pipeline; a group of opposite circular through holes I are formed in the opposite side surfaces of the filter box body, and the circular through holes I are formed in the upper end of the side surface of the filter box body; a first fastening bearing is embedded in the first circular through hole, and a first transmission shaft is inserted in the first fastening bearing; one end of the first transmission shaft extends out of the first fastening bearing, and one end of the first transmission shaft, which extends out of the first fastening bearing, is fixedly provided with a transmission rod; the transmission rod is vertically arranged; a first rotating motor is fixedly installed on the side surface of one side of the filtering box body, and the rotating end of the first rotating motor faces outwards horizontally; one end of the fixed eccentric block is in transmission connection with the transmission rod through a connecting pin shaft; a coarse filter screen supporting plate is fixedly mounted on the first transmission shaft, and a coarse filter screen is fixedly mounted in the coarse filter screen supporting plate.
The cleaning device comprises a second circular through hole formed in the side surface of the filter box body, and a second fastening bearing is embedded in the second circular through hole; the two circular through holes are positioned above the first circular through hole; a linear motor is fixedly arranged on one side surface of the filtering box body, and the telescopic end of the linear motor faces inwards horizontally; the telescopic end of the linear motor is inserted into the second fastening bearing, and a material pushing plate is fixedly installed at the telescopic end of the linear motor; the upper end of the other side surface of the filtering box body is provided with a first impurity outlet, a first impurity discharge pipeline is fixedly arranged in the first impurity outlet, and a first impurity discharge control valve is arranged on the first impurity discharge pipeline; and the first impurity outlet corresponds to the position of the material pushing plate.
The fine filtering device comprises a group of opposite fine filtering net supporting plates fixedly arranged at the bottom in the filtering box body, and a fine filtering net is fixedly arranged in the fine filtering net supporting plates; one end of the fine filter screen supporting plate is fixedly connected with the lower surface of the coarse filter screen supporting plate, and the other end of the fine filter screen supporting plate is fixedly connected with the bottom in the filter box body; a third circular through hole is formed in the center of the lower surface of the filtering box body, a third fastening bearing is inserted into the third circular through hole, and a second transmission shaft is inserted into the third fastening bearing; the lower end of the second transmission shaft extends out of the third fastening bearing, and a first belt pulley is fixedly mounted at the lower end of the second transmission shaft extending out of the third fastening bearing; a second rotating motor is fixedly installed on the side surface of one side of the filtering box body, and the rotating end of the second rotating motor faces downwards vertically; a speed reducer is arranged on the second rotating motor, and a second belt pulley is fixedly arranged at the rotating end of the second rotating motor; the first belt pulley and the second belt pulley are sleeved with a transmission belt which is a V-shaped transmission belt; a spiral stirrer is fixedly arranged on the second transmission shaft; a second impurity outlet is formed in one side of the bottom of the filtering box body, a second impurity discharge pipeline is fixedly installed in the second impurity outlet, and a second impurity discharge control valve is installed on the second impurity discharge pipeline; one side of the bottom of one side of the filtering box body is provided with a water outlet, a water outlet pipeline is fixedly inserted in the water outlet, and a water outlet control valve is installed on the water outlet pipeline.
The coarse filter screen can effectively filter large granular impurities in domestic sewage, the first rotating motor can drive the fixed eccentric block on the rotating end, one end of the fixed eccentric block is in transmission connection with the transmission rod through the connecting pin shaft, and the first transmission shaft vibrates through the transmission rod to prevent the coarse filter screen from causing blockage.
The linear motor can drive the scraping wings on the telescopic end, the scraping wings can be used for cleaning impurities on the coarse mesh filter screen, and the cleaned impurities can be discharged through the first impurity outlet.
The second rotating electrical machines can drive the second belt pulley of the rotating end, the first belt pulley and the second belt pulley are sleeved with the transmission belt, so that the second transmission shaft on the first belt pulley can be driven, the spiral stirrer on the second transmission shaft can effectively stir sewage, the sewage is filtered by the fine filter screen under the action of centrifugal force to remove fine impurities, and finally, the sewage is discharged through the water outlet and is discharged through the impurity outlet.
The controller is provided with a capacitive display screen which can display the sewage level in the filter box body, and the controller is provided with a function button and a switch device.
The power utilization interface is electrically connected with an external power supply, and the power output end of the power utilization interface is electrically connected with the power input ends of the first rotating motor, the linear motor and the second rotating motor respectively.
The sewage treatment device with multi-stage filtration manufactured by the technical scheme of the invention can effectively filter various impurities in domestic sewage through the coarse filtration device and the fine filtration device which are positioned in the coarse filtration chamber and the fine filtration chamber, effectively improves the filtration effect, and the cleaning device can automatically clean the impurities on the coarse filtration screen, thereby being convenient for use.
Drawings
FIG. 1 is a schematic view showing the construction of a multistage filtration sewage treatment apparatus according to the present invention;
FIG. 2 is a schematic view of a coarse filtration apparatus according to the present invention;
FIG. 3 is a schematic view of the cleaning apparatus of the present invention;
FIG. 4 is a schematic view of a fine filtration apparatus according to the present invention;
FIG. 5 is a schematic view of the controller of the present invention;
in the figure, 1, a filtering box body; 2. a support frame; 3. a coarse filtration chamber; 4. a fine filtration chamber; 5. an electricity utilization interface; 6. a controller; 7. a water inlet; 8. a water inlet pipe; 9. a water inlet control valve; 10. a first circular through hole; 11. fastening a first bearing; 12. a first transmission shaft; 13. a transmission rod; 14. a first rotating motor; 15. fixing the eccentric block; 16. connecting a pin shaft; 17. a coarse mesh filter screen support plate; 18. a coarse mesh filter screen; 19. a second circular through hole; 20. fastening a second bearing; 21. a linear motor; 22. a material pushing plate; 23. an impurity outlet I; 24. a first impurity removal pipeline; 25. a first impurity discharge control valve; 26. a fine mesh filter screen support plate; 27. fine mesh filter screen; 28. a circular through hole III; 29. fastening a bearing III; 30. a second transmission shaft; 31. a first belt pulley; 32. a second rotating motor; 33. a speed reducer; 34. a second belt pulley; 35. a drive belt; 36. a helical agitator; 37. an impurity outlet II; 38. a second impurity removal pipeline; 39. a second impurity discharge control valve; 40. a water outlet; 41. a water outlet pipeline; 42. a water outlet control valve; 43. a capacitive display screen; 44. a function button; 45. a switching device.
Detailed Description
Referring to fig. 1-5, in the present embodiment, when in use, a user fixedly connects an external domestic sewage pipe to a water inlet pipe 8, fixedly connects an external sewage pipe to a water outlet pipe 41, electrically connects an electrical interface 5 to an external power source, and turns on a switch device 45;
the first step is as follows: the user opens the water inlet control valve 9, the domestic sewage enters the filtering box body 1 through the water inlet 7, firstly, the domestic sewage passes through the coarse filtering device, the coarse filtering net 18 can effectively filter large granular impurities in the domestic sewage, meanwhile, the rotating motor I14 drives the fixed eccentric block 15 on the rotating end, one end of the fixed eccentric block 15 is in transmission connection with the transmission rod 13 through the connecting pin shaft 16, the transmission shaft I12 vibrates through the transmission rod 13 to prevent the coarse filtering net 18 from causing blockage, the coarse filtering device can effectively filter large granular impurities in the sewage and can prevent the coarse filtering net 18 from blocking, the domestic sewage after coarse filtering flows into the fine filtering chamber 4, the fine filtering device starts to work, the rotating motor II 32 drives the belt pulley II 34 on the rotating end, the belt pulley I31 and the belt pulley II 34 are sleeved with the transmission belt 35, thereby driving the transmission shaft II 30 on the belt I31, the spiral stirrer 36 on the second transmission shaft 30 effectively stirs the coarsely filtered domestic sewage, the sewage is filtered by the fine filter screen 27 to remove fine and small impurities under the action of centrifugal force and is finally discharged through the water outlet 40, the impurities can be discharged through the second impurity outlet 37, various impurities in the domestic sewage can be effectively filtered by the coarse filtering device and the fine filtering device which are positioned in the coarse filtering chamber and the fine filtering chamber, and the filtering effect is effectively improved;
the second step is that: when the user need clear up impurity on the coarse mesh filter screen 18, the user assigns the instruction through controller 6, cleaning device begins work, linear electric motor 21 drives the flexible scraping wings 22 of serving, scraping wings 22 can be used for clearing up the impurity on the coarse mesh filter screen 18, impurity export 23 is corresponding with scraping wings 22 position, impurity accessible impurity export 23 after the clearance is discharged, can effectively filter the various impurity in the domestic sewage through the coarse filtration device and the fine filtration device that are located coarse filtration room and fine filtration room, effectively improve the filter effect, the impurity on the coarse mesh filter screen can be cleared up automatically to cleaning device, and convenient use.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (1)
1. A sewage treatment device with multi-stage filtration comprises a filtration box body (1) and a support frame (2) positioned at the bottom of the filtration box body (1), it is characterized in that a coarse filtration chamber (3) and a fine filtration chamber (4) are arranged in the filtration box body (1) in turn along the height of the filtration box body, a coarse filtering device and a cleaning device are respectively arranged in the coarse filtering chamber (3), a fine filtering device is arranged in the fine filtering chamber (4), the coarse filter device and the fine filter device can effectively filter various impurities in domestic sewage, the cleaning device can automatically clean the impurities on the coarse filter screen, an electric interface (5) is arranged at one side of the bottom of the filtering box body (1), a controller (6) is arranged at one side of the filtering box body (1), the signal output end of the controller (6) is electrically connected with the signal input ends of the first rotating motor, the linear motor and the second rotating motor respectively;
the coarse filtering device comprises a water inlet (7) formed in the center of the upper surface of the filtering box body (1), a water inlet pipeline (8) is fixedly inserted into the water inlet (7), and a water inlet control valve (9) is installed on the water inlet pipeline (8); a group of opposite circular through holes I (10) are formed in the opposite side surfaces of the filtering box body (1), and the circular through holes I (10) are formed in the upper end of the side surfaces of the filtering box body (1); a first fastening bearing (11) is embedded in the first circular through hole (10), and a first transmission shaft (12) is inserted into the first fastening bearing (11); one end of the first transmission shaft (12) extends out of the first fastening bearing (11), and one end of the first transmission shaft (12) extending out of the first fastening bearing (11) is fixedly provided with a transmission rod (13); the transmission rod (13) is vertically arranged; a first rotating motor (14) is fixedly installed on the surface of one side of the filtering box body (1), and the rotating end of the first rotating motor (14) faces outwards horizontally; a fixed eccentric block (15) is fixedly installed at the rotating end of the first rotating motor (14), and one end of the fixed eccentric block (15) is in transmission connection with the transmission rod (13) through a connecting pin shaft (16); a coarse filter screen supporting plate (17) is fixedly arranged on the transmission shaft I (12), and a coarse filter screen (18) is fixedly arranged in the coarse filter screen supporting plate (17);
the cleaning device comprises a second round through hole (19) formed in the surface of one side of the filtering box body (1), and a second fastening bearing (20) is embedded in the second round through hole (19); the second round through hole (20) is positioned above the first round through hole (10); a linear motor (21) is fixedly arranged on the surface of one side of the filtering box body (1), and the telescopic end of the linear motor (21) faces inwards horizontally; the telescopic end of the linear motor (21) is inserted into the second fastening bearing (20), and a material pushing plate (22) is fixedly installed at the telescopic end of the linear motor (21); a first impurity outlet (23) is formed in the upper end of the surface of the other side of the filtering box body (1), a first impurity discharge pipeline (24) is fixedly installed in the first impurity outlet (23), and a first impurity discharge control valve (25) is installed on the first impurity discharge pipeline (24); the first impurity outlet (23) corresponds to the position of the material pushing plate (22);
the fine filtering device comprises a group of opposite fine filtering net supporting plates (26) fixedly arranged at the bottom in the filtering box body (1), and fine filtering nets (27) are fixedly arranged in the fine filtering net supporting plates (26); one end of the fine filter screen supporting plate (26) is fixedly connected with the lower surface of the coarse filter screen supporting plate (17), and the other end is fixedly connected with the bottom in the filter box body (1); a third circular through hole (28) is formed in the center of the lower surface of the filtering box body (1), a third fastening bearing (29) is inserted into the third circular through hole (28), and a second transmission shaft (30) is inserted into the third fastening bearing (29); the lower end of the second transmission shaft (30) extends out of the third fastening bearing (29), and the lower end of the second transmission shaft (30) extending out of the third fastening bearing (29) is fixedly provided with a first belt pulley (31); a second rotating motor (32) is fixedly installed on the surface of one side of the filtering box body (1), and the rotating end of the second rotating motor (32) faces downwards vertically; a speed reducer (33) is installed on the second rotating motor (32), and a second belt pulley (34) is fixedly installed at the rotating end of the second rotating motor (32); the belt pulley I (31) and the belt pulley II (34) are sleeved with a transmission belt (35), and the transmission belt (35) is a V-shaped transmission belt; a spiral stirrer (36) is fixedly arranged on the second transmission shaft (30); a second impurity outlet (37) is formed in one side of the bottom of the filtering box body (1), a second impurity discharge pipeline (38) is fixedly installed in the second impurity outlet (37), and a second impurity discharge control valve (39) is installed on the second impurity discharge pipeline (38); a water outlet (40) is formed in one side of the bottom of one side of the filtering box body (1), a water outlet pipeline (41) is fixedly inserted in the water outlet (40), and a water outlet control valve (42) is installed on the water outlet pipeline (41);
the coarse filter screen (18) can effectively filter large-particle impurities in domestic sewage, the rotating motor I (14) can drive the fixed eccentric block (15) on the rotating end, one end of the fixed eccentric block (15) is in transmission connection with the transmission rod (13) through the connecting pin shaft (16), and the transmission shaft I (12) generates vibration through the transmission rod (13) to prevent the coarse filter screen (18) from blocking;
the linear motor (21) can drive the material pushing plate (22) on the telescopic end, the material pushing plate (22) can be used for cleaning impurities on the coarse mesh filter screen (18), and the cleaned impurities can be discharged through the first impurity outlet (23);
the rotating motor II (32) can drive the belt pulley II (34) on the rotating end, the belt pulley I (31) and the belt pulley II (34) are sleeved with the transmission belt (35), so that the transmission shaft II (30) on the belt pulley I (31) can be driven, the spiral stirrer (36) on the transmission shaft II (30) can effectively stir the sewage, the sewage is filtered by the fine-mesh filter screen (27) under the action of centrifugal force, and is finally discharged through the water outlet (40), and the impurities can be discharged through the impurity outlet II (37);
a capacitive display screen (43) is arranged on the controller (6), the capacitive display screen (43) can display the sewage level in the filtering box body (1), and a function button (44) and a switch device (45) are arranged on the controller (6);
the power utilization interface (5) is electrically connected with an external power supply, and the power supply output end of the power utilization interface (5) is electrically connected with the power supply input ends of the first rotating motor (14), the linear motor (21) and the second rotating motor (32) respectively;
when the domestic sewage drainage device is used, a user fixedly connects an external domestic sewage pipeline with a water inlet pipeline (8), fixedly connects the external sewage drainage pipeline with a water outlet pipeline (41), is electrically connected with an external power supply through an electric interface (5), and turns on a switch device (45);
the first step is as follows: a user opens the water inlet control valve (9), domestic sewage enters the filtering box body (1) through the water inlet (7), firstly, the domestic sewage passes through the coarse filtering device, the coarse filtering net (18) can effectively filter large-particle impurities in the domestic sewage, meanwhile, the first rotating motor (14) drives the fixed eccentric block (15) on the rotating end, one end of the fixed eccentric block (15) is in transmission connection with the transmission rod (13) through the connecting pin shaft (16), the first transmission shaft (12) generates vibration through the transmission rod (13) to prevent the blockage phenomenon caused by the coarse filtering net (18), the coarse filtering device can effectively filter the large-particle impurities in the sewage and can prevent the blockage phenomenon caused by the coarse filtering net (18), the domestic sewage after coarse filtering flows into the fine filtering chamber (4), and the fine filtering device starts to work, the rotating motor II (32) drives the belt pulley II (34) on the rotating end, the belt pulley I (31) and the belt pulley II (34) are sleeved with the transmission belt (35), so that the transmission shaft II (30) on the belt pulley I (31) can be driven, the spiral stirrer (36) on the transmission shaft II (30) can be used for effectively stirring the domestic sewage subjected to coarse filtration, under the action of centrifugal force, the sewage is filtered by the fine particle filter screen (27) to remove fine particles of impurities and is finally discharged by the water outlet (40), the impurities can be discharged by the impurity outlet II (37), various impurities in the domestic sewage can be effectively filtered by the coarse filter device and the fine filter device which are positioned in the coarse filter chamber and the fine filter chamber, and the filtering effect is effectively improved;
the second step is that: when the user need clear up impurity on the coarse mesh filter screen (18), the user assigns the instruction through controller (6), cleaning device begins work, linear electric motor (21) drive scraping wings (22) on the flexible end, scraping wings (22) can be used for clearing up the impurity on the coarse mesh filter screen (18), impurity export (23) are corresponding with scraping wings (22) position, impurity accessible impurity export (23) discharge after the clearance, can effectively filter the various impurity in the domestic sewage through the coarse filtration device and the thin filter equipment that are located in coarse filtration room and the thin filter room, effectively improve the filter effect, the impurity on the coarse mesh filter screen can be cleared up automatically to cleaning device, and convenient use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811297903.5A CN109173428B (en) | 2018-11-02 | 2018-11-02 | Multistage filtering sewage treatment device |
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| CN201811297903.5A CN109173428B (en) | 2018-11-02 | 2018-11-02 | Multistage filtering sewage treatment device |
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| CN109173428A CN109173428A (en) | 2019-01-11 |
| CN109173428B true CN109173428B (en) | 2020-08-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389088A (en) * | 2019-11-11 | 2020-07-10 | 广东六丰能源服务有限公司 | Environment-friendly purification treatment device for domestic wastewater |
| CN112209519A (en) * | 2020-11-05 | 2021-01-12 | 苏州艾捷尔斯生物科技有限公司 | Miscellaneous recovery unit is strained to miscellaneous waste water of environmental protection |
| CN113877276B (en) * | 2021-09-11 | 2022-12-06 | 重庆巨科环保有限公司 | Industrial heavy metal sewage treatment system |
| CN114136835A (en) * | 2021-12-29 | 2022-03-04 | 南通化学环境监测站有限公司 | Method for detecting content of suspended matters in sewage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107792903A (en) * | 2017-12-13 | 2018-03-13 | 泰兴市汇辰过滤器制造有限公司 | A kind of new sanitary wastewater filter mechanism |
| CN207685066U (en) * | 2017-12-27 | 2018-08-03 | 河南沣悦电子科技有限公司 | A kind of multistage filtering formula sewage disposal device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107792903A (en) * | 2017-12-13 | 2018-03-13 | 泰兴市汇辰过滤器制造有限公司 | A kind of new sanitary wastewater filter mechanism |
| CN207685066U (en) * | 2017-12-27 | 2018-08-03 | 河南沣悦电子科技有限公司 | A kind of multistage filtering formula sewage disposal device |
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Inventor after: Shen Wanzhong Inventor after: Yu Daian Inventor before: Yu Daian |
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Effective date of registration: 20200729 Address after: 314300, 68, Yee Yuen Road, Wuyuan street, Haiyan County, Zhejiang, Jiaxing Applicant after: ZHEJIANG HAIYAN POWER SYSTEM RESOURCES ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Address before: 610093 Tianfu Avenue Middle Section 1388, Chengdu High-tech Zone, Sichuan Province, No. 522, 5th Floor, Building 1 Applicant before: CHENGDU WENBO RONGYAO TECHNOLOGY Co.,Ltd. |
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