CN214693734U - A kind of domestic sewage filter equipment - Google Patents
A kind of domestic sewage filter equipment Download PDFInfo
- Publication number
- CN214693734U CN214693734U CN202120729804.0U CN202120729804U CN214693734U CN 214693734 U CN214693734 U CN 214693734U CN 202120729804 U CN202120729804 U CN 202120729804U CN 214693734 U CN214693734 U CN 214693734U
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- box body
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- 239000010865 sewage Substances 0.000 title claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 12
- 241001330002 Bambuseae Species 0.000 claims abstract description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 12
- 239000011425 bamboo Substances 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 241000904014 Pappus Species 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 27
- 230000005611 electricity Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- 244000309464 bull Species 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000009928 pasteurization Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010170 biological method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model discloses a domestic sewage filtration equipment relates to the sewage treatment device field, to the not good and difficult abluent problem of filter screen of current domestic sewage filtration equipment filter effect, now proposes following scheme, and it includes box, first mounting box and second mounting box, fixed mounting has elementary filter in the box, just two blanking mouths that the structure is the same are seted up to elementary filter, elementary filter bottom slidable mounting has two collection device that the structure is the same and be symmetric distribution, and two collection device is located homonymy blanking mouth below, box one side fixed mounting has first mounting box, just fixed mounting has the step electricity in the first mounting box. The utility model discloses novel structure, and the device reaches the effect of filtering domestic sewage through being equipped with elementary filter, active carbon filter and bamboo fibre filter, and through being equipped with cleaning device, reaches the effect of clean elementary filter screen, has improved the filter effect greatly.
Description
Technical Field
The utility model relates to a sewage treatment device field especially relates to a domestic sewage filtration equipment.
Background
The domestic sewage treatment is a process for removing organic matters and inorganic impurities contained in life by adopting physical, chemical and biological methods to ensure that the water quality meets the discharge standard or the repeated use requirement.
The present domestic sewage filtration equipment most can only filter great impurity, is difficult to filter less sand and stone and small granule, can not disinfect the sewage after filtering moreover, can not reach sewage discharge's standard, has polluted the water resource, and when the filter screen among the present domestic sewage filtration equipment used, the surface remained has mud or impurity to make the filter screen block up, and inconvenient washing influences filterable effect, reduces work efficiency. Therefore, in order to solve the above problems, we have proposed a domestic sewage filtering apparatus.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of domestic sewage filtration equipment has solved the not good and difficult abluent problem of filter screen of current domestic sewage filtration equipment filter effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a domestic sewage filtering device comprises a box body, a first mounting box and a second mounting box, wherein a primary filter plate is fixedly mounted in the box body, the primary filter plate is provided with two blanking ports with the same structure, two collecting devices with the same structure and symmetrical distribution are slidably mounted at the bottom end of the primary filter plate, the two collecting devices are positioned below the blanking ports on the same side, the first mounting box is fixedly mounted on one side of the box body, a stepping motor is fixedly mounted in the first mounting box, a reciprocating lead screw is rotatably mounted in the box body, one end of the reciprocating lead screw, close to the first mounting box, penetrates through the box body and is fixedly connected with the end part of an output shaft of the stepping motor, a cleaning device is arranged on the circumferential side wall of the reciprocating lead screw, a second mounting box is fixedly mounted on one side of the box body, and a rotating rod is mounted in the second mounting box, just the dwang runs through the box near box one end, the dwang runs through box one end circumference lateral wall fixed mounting and has the same structure and be the puddler that the rectangular array distributes, just be equipped with drive arrangement between dwang and the step motor output shaft, fixed mounting has active carbon filter and bamboo fiber filter in the box, just the active carbon filter is located bamboo fiber filter top.
Preferably, the collecting device comprises a movable groove, a movable block and collecting boxes, two collecting boxes which are same in structure and symmetrically distributed are slidably mounted at the bottom end of the primary filter plate, the two collecting boxes are close to the same side, the movable block which is same in structure is fixedly mounted on one side of the inner wall of the box body, the movable groove which is matched with the movable block on the same side is formed in the box body, two sliding blocks which are same in structure are fixedly mounted at the top ends of the two collecting boxes, a sliding groove which is matched with the sliding block is formed in the bottom end of the primary filter plate, two mounting grooves which are same in structure are formed in the inner wall of one side of the box body, magnets are fixedly mounted in the two mounting grooves, magnet pieces which are same in structure are fixedly mounted on one side of the two collecting boxes close to the mounting groove on the same side, one sides of the two collecting boxes, which are far away from the mounting grooves, penetrate through the box body and are fixedly mounted with handles which are same in structure, and the two collecting boxes are of a net structure.
Preferably, the cleaning device comprises support rods, support blocks, connecting blocks, scrapers, rotating gears, connecting rods and gear blocks, two support rods with the same structure are fixedly installed on the box body, the gear blocks with the same structure and distributed in a rectangular array are fixedly installed on the circumferential side walls of the two support rods, the support blocks are sleeved on the circumferential side walls of the reciprocating screw rods in a threaded manner, one ends of the two support rods, far away from the first installation box, slidably penetrate through the support blocks, the scrapers are fixedly installed at the bottom ends of the support blocks, two connecting blocks with the same structure and distributed in a symmetrical manner are fixedly installed on one side, close to the first installation box, of the support blocks, the connecting rods are rotatably installed between the two connecting blocks, the soft brushes with the same structure and distributed in a rectangular array are fixedly installed on the circumferential side walls of the connecting rods, and the rotating gears with the same structure and distributed in a symmetrical manner are fixedly sleeved on the circumferential side walls of the connecting rods, the two rotating gears are meshed with the gear blocks on the same side.
Preferably, drive arrangement is including driving the rim plate, driving belt and from the driving wheel dish, the fixed cover of step motor output shaft is equipped with the driving rim plate, just the dwang is close to the fixed cover of second mounting box one end circumference lateral wall and is equipped with the driven rim plate, the driving rim plate is equipped with driving belt with from the cover between the driving wheel dish.
Preferably, the box is close to the first one side fixed mounting of installing there is the inlet pipe, just first mounting box one side fixed mounting is kept away from to the box has the discharging pipe, just equal fixed mounting has the control valve that the structure is the same in inlet pipe and the discharging pipe, fixed mounting has the funnel in the box, just the funnel is located between primary filter and the active carbon filter, box inner wall fixed mounting has the heating pipe.
The utility model has the advantages that:
1. through the setting of elementary filter, active carbon filter and bamboo fibre filter, reach the effect of filtering domestic sewage, and under the cooperation of active carbon filter and bamboo fibre filter, play the effect of further cleaing away small granule in the domestic sewage and harmful smell, and through being equipped with heating pipe and drive arrangement, drive arrangement drive puddler rotates, reaches the effect of stirring sewage, and heats sewage through the heating pipe, reaches the sterile effect of pasteurization, improves sewage treatment's efficiency.
2. Through being equipped with cleaning device, utilize step motor drive scraper blade to remove, play the effect of scraping out primary filter surface mud, improve the permeability of primary filter, improve filtration efficiency, and take the pappus brush through the connecting rod and rotate, reach the effect of near-step clean primary filter, and through being equipped with collection device, play the effect of collecting mud, the staff's of being convenient for clearance has improved work efficiency greatly.
To sum up, the device novel structure through being equipped with elementary filter, active carbon filter and bamboo fibre filter, reaches the effect of filtering domestic sewage, and through being equipped with cleaning device, reaches the effect of clean elementary filter screen, has improved the filter effect greatly, and the device has the effect of pasteurization effect, has improved the practicality of device.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1 according to the present invention;
FIG. 3 is a sectional view of the present invention;
fig. 4 is a side sectional view of the cleaning device of the present invention.
Reference numbers in the figures: 1. a box body; 2. a bamboo fiber filter plate; 3. an activated carbon filter plate; 4. a primary filter plate; 5. a reciprocating screw rod; 6. a squeegee; 7. a support block; 8. connecting blocks; 9. a first mounting box; 10. a stepping motor; 11. a drive wheel disc; 12. a drive belt; 13. a collection box; 14. a second mounting box; 15. rotating the rod; 16. a driven wheel disc; 17. a stirring rod; 18. a movable groove; 19. a movable block; 20. a support bar; 21. a connecting rod; 22. a rotating gear; 23. a tooth block; 24. and (4) mounting the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, a domestic sewage filtering device comprises a box body 1, a first mounting box 9 and a second mounting box 14, wherein a primary filter plate 4 is fixedly arranged in the box body 1, the primary filter plate 4 is provided with two blanking ports with the same structure, two collecting devices with the same structure and symmetrical distribution are slidably arranged at the bottom end of the primary filter plate 4, the two collecting devices are positioned below the blanking ports with the same structure, the first mounting box 9 is fixedly arranged at one side of the box body 1, a stepping motor 10 is fixedly arranged in the first mounting box 9, a reciprocating screw rod 5 is rotatably arranged in the box body 1, one end of the reciprocating screw rod 5 close to the first mounting box 9 penetrates through the box body 1 and is fixedly connected with the end part of an output shaft of the stepping motor 10, a cleaning device is arranged on the circumferential side wall of the reciprocating screw rod 5, the second mounting box 14 is fixedly arranged at one side of the box body 1 close to the first mounting box 9, a rotating rod 15 is arranged in the second mounting box 14, and the rotating rod 15 is close to one end of the box body 1 and penetrates through the box body 1, the rotating rod 15 penetrates through the circumferential side wall of one end of the box body 1 and is fixedly provided with stirring rods 17 which have the same structure and are distributed in a rectangular array, a driving device is arranged between the rotating rod 15 and an output shaft of the stepping motor 10, an activated carbon filter plate 3 and a bamboo fiber filter plate 2 are fixedly arranged in the box body 1, the activated carbon filter plate 3 is positioned above the bamboo fiber filter plate 2, one side of the box body 1 close to the first installation box is fixedly provided with a feed pipe, one side of the box body 1 far away from the first installation box 9 is fixedly provided with a discharge pipe, control valves which have the same structure are fixedly arranged in the feed pipe and the discharge pipe, a funnel is fixedly arranged in the box body 1 and is positioned between the primary filter plate 4 and the activated carbon filter plate 3, the inner wall of the box body 1 is fixedly provided with a heating pipe, the driving device comprises a driving wheel disc 11, a driving belt 12 and a driven wheel disc 16, the output shaft of the stepping motor 10 is fixedly sleeved with a driving wheel disc 11, the circumferential side wall of the rotating rod 15 close to one end of the second mounting box 14 is fixedly sleeved with a driven wheel disc 16, a transmission belt 12 is sleeved between the driving wheel disc 11 and the driven wheel disc 16, when in use, a worker opens a control valve in a feeding pipe to inject domestic sewage into the box body 1 from the feeding pipe, the domestic sewage flows into the bottom of the box body 1 through the primary filter plate 4, the primary filter plate 4 plays a role in filtering large-particle impurities in the domestic sewage, the worker starts the stepping motor 10, the stepping motor 10 drives the reciprocating screw rod 5 to rotate, the reciprocating screw rod 5 causes the cleaning device to move, the primary filter plate 4 is cleaned, the permeability of the primary filter plate 4 is ensured, a better filtering effect is conveniently achieved, the working efficiency is improved, and the collection device is arranged to collect the removed large-particle impurities, it is clean to be convenient for the staff, and step motor 10 drives driving wheel dish 11 and rotates, driving wheel dish 11 passes through driven wheel dish 16 of driving belt 12 drive and rotates, driven wheel dish 16 drive dwang 15 rotates, reach the effect of stirring prefiltration sewage, and through the heating pipe, reach the sterile effect of pasteurization, the efficiency of handling sewage is greatly improved, the sewage that the preliminary treatment has fallen into the active carbon filter 3 of below through the funnel, play the effect of filtering granule impurity in the sewage, reach the effect of further filtration sewage, and bamboo fiber filter 2 plays the effect of cleaing away peculiar smell in the sewage, sewage accessible discharging pipe through multilevel processing gets into next step, carry out further processing.
Referring to fig. 3-4, the cleaning device comprises support rods 20, support blocks 7, connecting blocks 8, scrapers 6, rotating gears 22, connecting rods 21 and tooth blocks 23, wherein two support rods 20 with the same structure are fixedly installed on the box body 1, the tooth blocks 23 with the same structure and distributed in a rectangular array are fixedly installed on the circumferential side walls of the two support rods 20, the supporting blocks 7 are sleeved on the circumferential side walls of the reciprocating screw 5 in a threaded manner, one ends of the two support rods 20, far away from the first installation box 9, penetrate through the support blocks 7 in a sliding manner, the scrapers 6 are fixedly installed at the bottom ends of the support blocks 7, two connecting blocks 8 with the same structure and distributed in a symmetrical manner are fixedly installed on one side, close to the first installation box 9, of the support blocks 7, the connecting rods 21 are rotatably installed between the two connecting blocks 8, the soft brushes with the same structure and distributed in a rectangular array are fixedly installed on the circumferential side walls of the connecting rods 21, and the rotating gears 22 with the same structure and distributed in a symmetrical manner are fixedly sleeved on the circumferential side walls of the connecting rods 21, two bull gears 22 all with homonymy tooth piece 23 meshing, the staff starts step motor 10, step motor 10 drives reciprocal lead screw 5 and rotates, reciprocal lead screw 5 drive supporting shoe 7 takes scraper blade 6 to be reciprocating motion, play the effect of clean elementary filter 4, and supporting shoe 7 takes connecting block 8 to remove, connecting block 8 takes connecting rod 21 to remove, bracing piece 20 plays the effect of supporting shoe 7 simultaneously, tooth piece 23 of connecting rod 21 bottom installation can drive bull gear 22 and rotate, bull gear 22 drives connecting rod 21 and rotates, play the effect of further clean elementary filter 4 through the pappus brush, guarantee the permeability of elementary filter 4, the filtration efficiency of device has been improved greatly.
Referring to fig. 2, the collecting device comprises a movable groove 18, a movable block 19 and collecting boxes 13, two collecting boxes 13 with the same structure and symmetrical distribution are slidably mounted at the bottom end of a primary filter plate 4, the movable block 19 with the same structure is fixedly mounted at one side of the inner wall of a box body 1 at the same side of the two collecting boxes 13, the movable groove 18 matched with the movable block 19 at the same side is formed in the box body 1, two sliders with the same structure are fixedly mounted at the top ends of the two collecting boxes 13, a sliding groove matched with the slider is formed at the bottom end of the primary filter plate 4, two mounting grooves 24 with the same structure are formed in the inner wall of one side of the box body 1, magnets are fixedly mounted in the two mounting grooves 24, magnet pieces with the same structure are fixedly mounted at one side of the two collecting boxes 13 close to the mounting grooves 24 at the same side, one side of the two collecting boxes 13 far from the mounting grooves 24 penetrates through the box body 1 and handles with the same structure are fixedly mounted, and two collection boxes all are network structure, and the debris that clear away through cleaning device falls into the collection box 13 of 4 bottom slidable mounting of primary filter, and staff's accessible handle pulling collects box 13, will collect box 13 and pull out, and the staff's of being convenient for cleanness collects box 13, and through collection device's setting, also can clean primary filter 4 when playing the device filtration, has improved filtration efficiency greatly.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A domestic sewage filtering device comprises a box body (1), a first mounting box (9) and a second mounting box (14), and is characterized in that a primary filter plate (4) is fixedly mounted in the box body (1), two blanking ports with the same structure are formed in the primary filter plate (4), two collecting devices with the same structure and symmetrical distribution are slidably mounted at the bottom end of the primary filter plate (4) and located below the blanking ports on the same side, the first mounting box (9) is fixedly mounted on one side of the box body (1), a stepping motor (10) is fixedly mounted in the first mounting box (9), a reciprocating screw rod (5) is rotatably mounted in the box body (1), one end of the reciprocating screw rod (5) close to the first mounting box (9) penetrates through the box body (1) and is fixedly connected with the end part of an output shaft of the stepping motor (10), reciprocal lead screw (5) circumference lateral wall is equipped with cleaning device, just box (1) is close to first mounting box (9) one side fixed mounting and has second mounting box (14), dwang (15) are installed to second mounting box (14) endotheca, just dwang (15) are close to box (1) one end and run through box (1), dwang (15) run through box (1) one end circumference lateral wall fixed mounting have the structure the same and be puddler (17) that the rectangle array distributes, just be equipped with drive arrangement between dwang (15) and step motor (10) output shaft, box (1) internal fixation installs active carbon filter (3) and bamboo fiber filter (2), just active carbon filter (3) are located bamboo fiber filter (2) top.
2. The domestic sewage filtering apparatus according to claim 1, wherein the collecting device comprises a movable groove (18), a movable block (19) and collecting boxes (13), two collecting boxes (13) with the same structure and symmetrical distribution are slidably mounted at the bottom end of the primary filter plate (4), the movable blocks (19) with the same structure are fixedly mounted at one side of the inner wall of the box body (1) close to the same side of the two collecting boxes (13), the movable groove (18) matched with the movable block (19) at the same side is formed in the box body (1), two sliding blocks with the same structure are fixedly mounted at the top ends of the two collecting boxes (13), a sliding groove matched with the sliding block is formed at the bottom end of the primary filter plate (4), two mounting grooves (24) with the same structure are formed at one side of the box body (1), and magnets are fixedly mounted in the two mounting grooves (24), and two are collected box (13) and are close to the homonymy mounting groove (24) one side fixed mounting has the magnet piece that the structure is the same, two collect box (13) and keep away from mounting groove (24) one side and all run through box (1) and fixed mounting have the same handle of structure, and two collect box (13) and all be network structure.
3. The domestic sewage filtering apparatus according to claim 1, wherein the cleaning device comprises support rods (20), support blocks (7), connecting blocks (8), scrapers (6), a rotating gear (22), a connecting rod (21) and toothed blocks (23), the box body (1) is fixedly provided with two support rods (20) with the same structure, the circumferential side walls of the two support rods (20) are fixedly provided with the toothed blocks (23) with the same structure and distributed in a rectangular array, the circumferential side walls of the reciprocating screw rods (5) are in threaded sleeve connection with the support blocks (7), one ends of the two support rods (20) far away from the first mounting box (9) are slidably penetrated through the support blocks (7), the scrapers (6) are fixedly arranged at the bottom ends of the support blocks (7), one sides of the support blocks (7) close to the first mounting box (9) are fixedly provided with the two connecting blocks (8) with the same structure and distributed symmetrically, and two rotate between connecting block (8) and install connecting rod (21), connecting rod (21) circumference lateral wall fixed mounting has the structure the same and is the pappus brush that the rectangle array distributes, just connecting rod (21) circumference lateral wall fixed mounting is equipped with two same structure and is the rotating gear (22) of symmetric distribution, two rotating gear (22) all with the homonymy tooth piece (23) meshing.
4. The domestic sewage filtering apparatus according to claim 1, wherein said driving device comprises a driving wheel disc (11), a driving belt (12) and a driven wheel disc (16), said stepping motor (10) has an output shaft fixed with said driving wheel disc (11), said rotating rod (15) is fixed with a driven wheel disc (16) near to the side wall of the circumference of one end of the second mounting box (14), said driving wheel disc (11) and said driven wheel disc (16) are sleeved with said driving belt (12).
5. The domestic sewage filtering apparatus according to claim 1, wherein the box body (1) is fixedly provided with a feeding pipe near the first mounting side, a discharging pipe far away from the first mounting box (9) is fixedly provided with a discharging pipe in the box body (1), the feeding pipe and the discharging pipe are fixedly provided with control valves with the same structure, a funnel is fixedly arranged in the box body (1) and is positioned between the primary filter plate (4) and the activated carbon filter plate (3), and the inner wall of the box body (1) is fixedly provided with a heating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120729804.0U CN214693734U (en) | 2021-04-12 | 2021-04-12 | A kind of domestic sewage filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120729804.0U CN214693734U (en) | 2021-04-12 | 2021-04-12 | A kind of domestic sewage filter equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214693734U true CN214693734U (en) | 2021-11-12 |
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ID=78530456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120729804.0U Expired - Fee Related CN214693734U (en) | 2021-04-12 | 2021-04-12 | A kind of domestic sewage filter equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214693734U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477578A (en) * | 2022-01-21 | 2022-05-13 | 杭州博天环保科技有限公司 | Domestic sewage treatment filtering and sterilizing device for environmental protection engineering |
| CN115178011A (en) * | 2022-08-12 | 2022-10-14 | 杨国太 | Multistage filtration processing apparatus for water treatment facilities |
| CN117865306A (en) * | 2024-01-31 | 2024-04-12 | 杭州三印染整有限公司 | A method and device for quality treatment of alkali reduction wastewater |
-
2021
- 2021-04-12 CN CN202120729804.0U patent/CN214693734U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477578A (en) * | 2022-01-21 | 2022-05-13 | 杭州博天环保科技有限公司 | Domestic sewage treatment filtering and sterilizing device for environmental protection engineering |
| CN115178011A (en) * | 2022-08-12 | 2022-10-14 | 杨国太 | Multistage filtration processing apparatus for water treatment facilities |
| CN117865306A (en) * | 2024-01-31 | 2024-04-12 | 杭州三印染整有限公司 | A method and device for quality treatment of alkali reduction wastewater |
| CN117865306B (en) * | 2024-01-31 | 2026-02-03 | 杭州三印染整有限公司 | Alkali deweighting wastewater quality-classifying treatment method and device |
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Granted publication date: 20211112 |