CN213407911U - Quick back flush dirt separator - Google Patents
Quick back flush dirt separator Download PDFInfo
- Publication number
- CN213407911U CN213407911U CN202021757654.6U CN202021757654U CN213407911U CN 213407911 U CN213407911 U CN 213407911U CN 202021757654 U CN202021757654 U CN 202021757654U CN 213407911 U CN213407911 U CN 213407911U
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- China
- Prior art keywords
- dirt separator
- wall
- packaging shell
- fixedly connected
- back flush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000012535 impurity Substances 0.000 claims description 51
- 238000004806 packaging method and process Methods 0.000 claims description 51
- 238000011001 backwashing Methods 0.000 claims description 36
- 239000007921 spray Substances 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- -1 chemical engineering Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model discloses a quick back flush dirt separator belongs to dirt separator technical field, and it includes the casing, the lower surface of casing inner wall has the rotation axis through the bearing joint, the filter has been cup jointed to the rotation axis outer wall, the filter sets up at the casing inner wall, the lower surface of filter and the last fixed surface of two sliders are connected. This quick back flush dirt separator, through setting up the rotary rod, the action wheel, from the driving wheel, the filter, back flush dirt separator body, shower nozzle and circulating water pump, cooperation through back flush dirt separator body and shower nozzle, back flush the filter, the staff can rotate manual carousel, make manual carousel drive the rotary rod rotate, the rotary rod passes through the action wheel and drives from the driving wheel and rotate, under the effect from the driving wheel, the rotation axis drives filter and slider and rotates, accelerate the efficiency of back flush, make more thoroughly that the filter washed simultaneously, improve this back flush dirt separator's suitability.
Description
Technical Field
The utility model belongs to the technical field of the scrubbing ware, specifically be a quick back flush scrubbing ware.
Background
The dirt separator is a component applied to a pipeline, mainly used for removing impurities in a pipeline medium, preventing the impurities from entering transmission equipment or other precise parts, preventing the impurities from damaging subsequent instruments or equipment, and enabling the transmission of fluid to be broken down, and is widely applied to the processes of petroleum, chemical engineering, water treatment, heating ventilation and the like.
According to the commonly-used backwashing dirt remover in the market at present, a water flow path generally passes through a filter screen from inside to outside, impurities are left in the filter screen, more and more impurities are accumulated on the filter screen along with the increase of the service time, particularly, the filter screen is further blocked along with the attachment and propagation of bacteria and algae on the filter screen, only part of impurities on the filter screen can be removed during backwashing, the washing speed is low, the washing is not thorough, and the applicability is low.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome prior art's above-mentioned defect, the utility model provides a quick back flush dirt separator, the back flush dirt separator commonly used in the existing market has been solved, the rivers route is generally for passing the filter screen from interior to exterior, impurity stays the inside of filter screen, along with the increase of live time, accumulational impurity is more and more on the filter screen, especially along with the adhering to and breeding of fungus algae on the filter screen, the filter screen is further blocked, when carrying out the back flush, also only can get rid of the partial impurity on the filter screen, the washing speed is slower, and wash not thorough, the lower problem of suitability.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: a quick back-washing dirt separator comprises a packaging shell, wherein the lower surface of the inner wall of the packaging shell is clamped with a rotating shaft through a bearing, the outer wall of the rotating shaft is sleeved with a filter plate, the filter plate is arranged on the inner wall of the packaging shell, the lower surface of the filter plate is fixedly connected with the upper surfaces of the two sliding blocks, the two sliding blocks are connected in the same sliding chute in a sliding way, the chute is arranged on the inner wall of the packaging shell, the top end of the rotating shaft is fixedly connected with the lower surface of the driven wheel, the driven wheel is meshed with the driving wheel, the right side surface of the driving wheel is fixedly connected with the left end of the rotating rod, the rotating rod is clamped on the right side surface of the outer wall of the packaging shell through a bearing, the outer wall of the rotating rod is clamped with a fixing plate through a bearing, the upper surface of fixed plate and the upper surface fixed connection of packaging shell inner wall, the right-hand member of rotary rod and the left surface fixed connection of manual carousel.
The outer wall of the rotating shaft is sleeved with a back flush dirt separator body through a bearing, the back flush dirt separator body is clamped on the inner wall of the packaging shell, the upper surface of the back flush dirt separator body is provided with a plurality of spray heads, the lower surface of the back flush dirt separator body is fixedly connected with the output end of the first guide pipe, the first guide pipe is communicated with the plurality of spray heads through the back flush dirt separator body, the first guide pipe is clamped on the left side surface of the outer wall of the packaging shell, the input end of the first conduit is communicated with the right side surface of the circulating water pump, the back surface of the circulating water pump is communicated with the outflow end of the second conduit, the input end of the second guide pipe is communicated with the left side face of the outer wall of the packaging shell, the lower surface of the circulating water pump is fixedly connected with the upper surface of the base, and the right side of the upper surface of the base is fixedly connected with the lower surface of the packaging shell.
As a further aspect of the present invention: the left side face and the right side face of the outer wall of the packaging shell are respectively clamped with an impurity collecting box, and grooves are formed in the upper surface and the lower surface of the impurity collecting box.
As a further aspect of the present invention: the groove is internally clamped with a fixed block, and the upper surface of the fixed block is fixedly connected with the upper surface of the inner wall of the groove through a strong spring.
As a further aspect of the present invention: the fixed block joint is in the fixed slot, the left surface at the packing casing is seted up to the fixed slot, the lower surface of fixed block and operating button's last fixed surface are connected, the operating button joint is at the lower surface of impurity collection box.
As a further aspect of the present invention: the packaging shell is characterized in that a water inlet is formed in the upper portion of the left side face of the packaging shell, a water outlet is formed in the lower portion of the right side face of the packaging shell, supporting bases are arranged at four corners of the lower surface of the base, and anti-slip pads are arranged on the lower surface of the supporting bases.
As a further aspect of the present invention: the filter plate and the backwashing dirt separator body are both round, the sliding groove and the sliding block are both T-shaped, and the right side surface of the manual rotary table is provided with a rotary handle.
(III) advantageous effects
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the quick backwashing dirt separator is provided with a rotating rod, a driving wheel, a driven wheel, a filter plate, a backwashing dirt separator body, a spray head and a circulating water pump, when the filter plate is blocked due to long-term use of the device by a worker, the circulating water pump is started, the circulating water pump absorbs the water in the packaging shell through the second conduit, the water is transferred into the back washing dirt separator body through the first conduit, and through the matching of the back washing dirt separator body and the spray head, the filter plate is back-washed, the staff can rotate the manual turntable, so that the manual turntable drives the rotating rod to rotate, the rotating rod drives the driven wheel to rotate through the driving wheel, under the effect of the driven wheel, the rotating shaft drives the filter plate and the sliding block to rotate, so that the backwashing efficiency is improved, the filter plate is washed more thoroughly, and the applicability of the backwashing dirt separator is improved.
2. The quick back-flushing dirt separator is provided with the impurity collecting box, the fixed blocks, the strong spring, the fixed grooves and the grooves, when a worker washes the quick back-flushing dirt separator, impurities blocked in the filter plate can be washed out, the impurities can slide into the impurity collecting box under the matching of the through holes formed in the outer wall of the packaging shell and the filter plate, the impurities are prevented from blocking the filter plate again, the practicability of the quick back-flushing dirt separator is improved, when the worker needs to install the impurity collecting box, the two sides of the packaging shell are aligned, the impurity collecting box is pressed, the two fixed blocks are extruded and move close to each other, after the impurity collecting box moves to a proper position, the two fixed blocks move away from each other under the elasticity of the strong spring, so that the two fixed blocks are respectively clamped into the two fixed grooves, and the packaging shell finishes the fixation of the impurity collecting box, make things convenient for the staff to collect the box to carry out the dismouting to impurity, improve this back flush dirt separator's convenience.
3. This quick back flush dirt separator, through setting up manual carousel, slider and spout, under manual carousel's effect, convenient and fast more when making the rotatory rotary rod of staff, set up slider and spout, when the rotatory rotary rod of staff, the rotary rod passes through the action wheel and drives the rotation axis from the driving wheel and rotate, it is rotatory to drive the filter at the rotation axis, under the cooperation of slider and spout, it is more stable when making the filter rotate, improve this back flush dirt separator's stability.
Drawings
Fig. 1 is a schematic structural view of a front view section of the present invention;
FIG. 2 is an enlarged schematic structural view of the impurity collecting box of the present invention;
FIG. 3 is a schematic top view of the filter plate of the present invention;
in the figure: the device comprises a packaging shell 1, a rotating shaft 2, a filter plate 3, a sliding block 4, a sliding chute 5, a driven wheel 6, a driving wheel 7, a rotating rod 8, a fixing plate 9, a manual rotating disc 10, a backwashing dirt separator body 11, a spray head 12, a first guide pipe 13, a circulating water pump 14, a second guide pipe 15, an impurity collecting box 16, a groove 17, a fixing block 18, a strong spring 19, a fixing groove 20, an operating button 21, a supporting base 22, a water inlet 23, a water outlet 24 and a base 25.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
As shown in fig. 1-3, the utility model provides a technical solution: a quick backwashing dirt separator comprises a packaging shell 1, wherein a rotating shaft 2 is clamped on the lower surface of the inner wall of the packaging shell 1 through a bearing, the rotating shaft 2 is arranged to drive a filter plate 3 to rotate, a spray head 12 is convenient to carry out omnibearing backwashing dirt removal on the filter plate 3, the backwashing dirt removal efficiency and the backwashing dirt removal effect are improved, the filter plate 3 is sleeved on the outer wall of the rotating shaft 2, the filter plate 3 is arranged on the inner wall of the packaging shell 1, the filter plate 3 can filter sewage through arranging the filter plate 3, the waste of water resources is reduced, the lower surface of the filter plate 3 is fixedly connected with the upper surfaces of two sliding blocks 4, the two sliding blocks 4 are slidably connected in the same sliding groove 5, the sliding groove 5 is arranged on the inner wall of the packaging shell 1, and when the rotating shaft 2 drives the filter plate 3 to rotate through arranging the sliding groove 5 and the, improve this back flush dirt separator's security, the top of rotation axis 2 and the lower fixed surface connection from driving wheel 6, from driving wheel 6 and action wheel 7 intermeshing, the right flank of action wheel 7 and the left end fixed connection of rotary rod 8, rotary rod 8 passes through the right flank of bearing joint at the 1 outer wall of packaging shell, the rotary rod 8 outer wall has fixed plate 9 through the bearing joint, the upper surface of fixed plate 9 and the upper surface fixed connection of 1 inner wall of packaging shell, through being provided with fixed plate 9, when making rotary rod 8 drive action wheel 7 rotate, it is more stable, improve this back flush dirt separator's stability, rotary rod 8's right-hand member and the left surface fixed connection of manual carousel 10.
The outer wall of the rotating shaft 2 is sleeved with a backwashing dirt separator body 11 through a bearing, the backwashing dirt separator body 11 is clamped on the inner wall of the packaging shell 1, the upper surface of the backwashing dirt separator body 11 is provided with a plurality of spray nozzles 12, the backwashing dirt separator body 11 and the spray nozzles 12 can spray moisture transported by the circulating water pump 14, so that the filter plate 3 can clean out blocked impurities under the backwashing of the backwashing dirt separator body 11 and the spray nozzles 12 to ensure that the backwashing dirt separator can normally work, the lower surface of the backwashing dirt separator body 11 is fixedly connected with the output end of a first guide pipe 13, the first guide pipe 13 is communicated with the plurality of spray nozzles 12 through the backwashing dirt separator body 11, the first guide pipe 13 is clamped on the left side surface of the outer wall of the packaging shell 1, the input end of the first guide pipe 13 is communicated with the right side surface of the circulating water pump 14, the back of the circulating water pump 14 is communicated with the outflow end of the second conduit 15, the input end of the second conduit 15 is communicated with the left side surface of the outer wall of the packaging shell 1, the lower surface of the circulating water pump 14 is fixedly connected with the upper surface of the base 25, and the right side of the upper surface of the base 25 is fixedly connected with the lower surface of the packaging shell 1.
Specifically, as shown in fig. 2, the fixed block 18 is connected in the groove 17 in a clamping manner, the upper surface of the fixed block 18 is fixedly connected with the upper surface of the inner wall of the groove 17 through the strong spring 19, the strong spring 19 is arranged, so that the impurity collecting box 16 can be conveniently disassembled and assembled by workers, after the impurity collecting box 16 is installed by the workers, the fixed block 18 is always in close contact with the fixed groove 20 under the action of the strong spring 19, the fixed block cannot be separated from the fixed groove 20, and the safety of the backwashing dirt separator is improved.
Specifically, as shown in fig. 1 and 2, the impurity collecting box 16 is clamped on the left and right side surfaces of the outer wall of the packaging shell 1, the upper surface and the lower surface of the impurity collecting box 16 are both provided with grooves 17, through the arrangement of the impurity collecting box 16, impurities at the washing position of the filter plate 3 flow into the impurity collecting box 16, so that workers can conveniently take out the impurities collected in the impurity collecting box 16, the filter plate 3 is prevented from being blocked by the impurities again, the practicability of the backwashing dirt separator is improved, the fixed block 18 is clamped in the fixed groove 20, the fixed groove 20 is arranged on the left side surface of the packaging shell 1, the lower surface of the fixed block 18 is fixedly connected with the upper surface of the operating button 21, the operating button 21 is clamped on the lower surface of the impurity collecting box 16, through setting up operating button 21, make things convenient for the staff to extrude two fixed blocks 18 through two operating button 21 to be convenient for the staff and collect box 16 and dismantle to the impurity.
Specifically, as shown in fig. 1 and 3, the top of the left side of packaging shell 1 is provided with water inlet 23, the below of the right side of packaging shell 1 is provided with delivery port 24, the four corners department of base 25 lower surface all is provided with supports base 22, the lower surface that supports base 22 is provided with the slipmat, set up the slipmat, prevent to support base 22 and slide, improve stability, the shape of filter 3 and back flush dirt separator body 11 all sets up to circular, the shape of spout 5 and slider 4 all sets up to the T shape, shape through with slider 4 and spout 5 all sets up to the T shape, when making rotation axis 2 drive filter 3 rotate, under the effect of slider 4 and spout 5, it is more stable, safety is improved, the right flank of manual carousel 10 is provided with the turning handle.
The utility model discloses a theory of operation does:
s1, the worker connects the water inlet 23 with the sewage discharge port, connects the water outlet 24 with the sewage recovery port, when the worker needs to use the backwashing dirt separator, the circulating water pump 14 is firstly started, the circulating water pump 14 works, the water in the packaging shell 1 is transferred into the backwashing dirt separator body 11 through the first conduit 13 through the second conduit 15, the backwashing dirt separator body 11 passes through a plurality of spray heads 12 arranged on the upper surface, the filter plate 3 is back-flushed and decontaminated, the worker can rotate the rotating handle at the right side of the manual rotating disc 10, so that the rotating handle drives the rotating rod 8 to rotate through the manual rotating disc 10, the rotating rod 8 drives the driving wheel 7 to rotate, the driving wheel 7 drives the rotating shaft 2 to rotate through the driven wheel 6, the rotating shaft 2 drives the filtering plate 3 arranged on the outer wall to rotate, so that the filter plate 3 can be uniformly back-flushed and decontaminated by the back-flushing dirt separator body 11 and the spray head 12;
s2, after the back washing is finished, impurities washed out through the through holes formed in the left side and the right side of the packaging shell 1 and the filter plates 3 slide into the impurity collecting box 16 and are collected by the impurity collecting box 16, a worker can close the circulating water pump 14, disconnect the water inlet 23 from the sewage discharge port and extrude the two corresponding operating buttons 21, so that the two operating buttons 21 drive the two fixed blocks 18 to move close to each other, and after the fixed blocks 18 are separated from the fixed grooves 20 in a clamping state, the worker pulls out the impurity collecting box 16 to dump the impurities collected in the impurity collecting box 16;
s3, after the staff topples over the impurity in the impurity collecting box 16, aim at the packaging shell 1 both sides, press the impurity collecting box 16, two fixed blocks 18 receive the extrusion, do the motion that is close to each other, after impurity collecting box 16 moved to suitable position, under the elasticity of powerful spring 19, two fixed blocks 18 were the motion of keeping away from each other for in two fixed blocks 18 blocked the two fixed slots 20 respectively, packaging shell 1 accomplished the fixed to impurity collecting box 16.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (6)
1. The utility model provides a quick back flush dirt separator, includes packaging shell (1), its characterized in that: the lower surface of the inner wall of the packaging shell (1) is connected with a rotating shaft (2) through a bearing clamp, the outer wall of the rotating shaft (2) is sleeved with a filter plate (3), the filter plate (3) is arranged on the inner wall of the packaging shell (1), the lower surface of the filter plate (3) is fixedly connected with the upper surfaces of two sliding blocks (4), the two sliding blocks (4) are connected in a same sliding chute (5) in a sliding mode, the sliding chute (5) is arranged on the inner wall of the packaging shell (1), the top end of the rotating shaft (2) is fixedly connected with the lower surface of a driven wheel (6), the driven wheel (6) is meshed with a driving wheel (7), the right side surface of the driving wheel (7) is fixedly connected with the left side of a rotating rod (8), the rotating rod (8) is connected with the right side surface of the outer wall of the packaging shell (1) through a bearing, the upper surface of the fixed plate (9) is fixedly connected with the upper surface of the inner wall of the packaging shell (1), and the right end of the rotating rod (8) is fixedly connected with the left side surface of the manual turntable (10);
the outer wall of the rotating shaft (2) is sleeved with a backwashing dirt separator body (11) through a bearing, the backwashing dirt separator body (11) is clamped on the inner wall of the packaging shell (1), the upper surface of the backwashing dirt separator body (11) is provided with a plurality of spray heads (12), the lower surface of the backwashing dirt separator body (11) is fixedly connected with the output end of a first guide pipe (13), the first guide pipe (13) is communicated with the plurality of spray heads (12) through the backwashing dirt separator body (11), the first guide pipe (13) is clamped on the left side surface of the outer wall of the packaging shell (1), the input end of the first guide pipe (13) is communicated with the right side surface of a circulating water pump (14), the back surface of the circulating water pump (14) is communicated with the outflow end of a second guide pipe (15), the input end of the second guide pipe (15) is communicated with the left side surface of the outer wall of the packaging shell (1), the lower surface of the circulating water pump (14) is fixedly connected with the upper surface of the base (25), and the right side of the upper surface of the base (25) is fixedly connected with the lower surface of the packaging shell (1).
2. The quick backwash dirt separator according to claim 1, characterized in that: the left side face and the right side face of the outer wall of the packaging shell (1) are respectively clamped with an impurity collecting box (16), and grooves (17) are formed in the upper surface and the lower surface of the impurity collecting box (16).
3. The quick backwash dirt separator according to claim 2, characterized in that: the improved structure is characterized in that a fixing block (18) is connected in the groove (17) in a clamping mode, and the upper surface of the fixing block (18) is fixedly connected with the upper surface of the inner wall of the groove (17) through a strong spring (19).
4. The quick backwash dirt separator according to claim 3, characterized in that: fixed block (18) joint is in fixed slot (20), the left surface at packing casing (1) is seted up in fixed slot (20), the lower surface of fixed block (18) and the last fixed surface of operating button (21) are connected, operating button (21) joint is at the lower surface of impurity collection box (16).
5. The quick backwash dirt separator according to claim 1, characterized in that: the packaging box is characterized in that a water inlet (23) is formed in the upper portion of the left side face of the packaging shell (1), a water outlet (24) is formed in the lower portion of the right side face of the packaging shell (1), supporting bases (22) are arranged at four corners of the lower surface of the base (25), and anti-slip pads are arranged on the lower surface of the supporting bases (22).
6. The quick backwash dirt separator according to claim 1, characterized in that: the filter plate (3) and the backwashing dirt separator body (11) are all round in shape, the sliding groove (5) and the sliding block (4) are all T-shaped in shape, and a rotating handle is arranged on the right side face of the manual rotating disc (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021757654.6U CN213407911U (en) | 2020-08-21 | 2020-08-21 | Quick back flush dirt separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021757654.6U CN213407911U (en) | 2020-08-21 | 2020-08-21 | Quick back flush dirt separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213407911U true CN213407911U (en) | 2021-06-11 |
Family
ID=76257768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021757654.6U Expired - Fee Related CN213407911U (en) | 2020-08-21 | 2020-08-21 | Quick back flush dirt separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213407911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054955A (en) * | 2022-06-10 | 2022-09-16 | 江苏华太生态环保科技有限公司 | Low-energy-consumption tail water upgrading treatment system and use method thereof |
-
2020
- 2020-08-21 CN CN202021757654.6U patent/CN213407911U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054955A (en) * | 2022-06-10 | 2022-09-16 | 江苏华太生态环保科技有限公司 | Low-energy-consumption tail water upgrading treatment system and use method thereof |
| CN115054955B (en) * | 2022-06-10 | 2023-08-18 | 江苏华太生态环保科技有限公司 | Low-energy-consumption tail water label extraction treatment system and application method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210611 |