CN114904303A - Filtering and backwashing device and method - Google Patents
Filtering and backwashing device and method Download PDFInfo
- Publication number
- CN114904303A CN114904303A CN202210611676.9A CN202210611676A CN114904303A CN 114904303 A CN114904303 A CN 114904303A CN 202210611676 A CN202210611676 A CN 202210611676A CN 114904303 A CN114904303 A CN 114904303A
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- outlet
- inlet
- backwashing
- filtering
- water
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- 238000011001 backwashing Methods 0.000 title claims abstract description 81
- 238000001914 filtration Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 210000000078 claw Anatomy 0.000 claims abstract description 19
- 238000007528 sand casting Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000008676 import Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
- B01D24/14—Downward filtration, the container having distribution or collection headers or pervious conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
- B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4668—Regenerating the filtering material in the filter by moving the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
- B01D24/4884—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration by pressure measuring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of filtering devices, and provides a filtering and backwashing device which comprises a cylinder body and a fluid inlet and outlet arranged on the cylinder body, wherein the fluid inlet and outlet comprise a first water pipe and a second water pipe which are communicated with the fluid inlet and outlet, a filter material layer arranged in the cylinder body, and a stirring device; the stirring device comprises a plurality of blades distributed along the circumference, and a plurality of sand-casting claws are arranged on the blades. And pressure sensors are arranged at the positions of the fluid inlet and the fluid outlet of the cylinder body and are used for monitoring the inlet pressure and the outlet pressure of the fluid in real time. The invention also designs a filtering and back-flushing method, and the filtering and back-flushing functions can be automatically switched in a set of device according to set conditions. The invention also designs a side-feeding type stirring device which is provided with a plurality of blades with the founding claws, and the founding claws are used for stirring and back-cleaning the filter material layer from bottom to top, so that the adhered substances are fully separated from the filter material, the filtering effect is improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of filtering devices, in particular to a filtering and backwashing device and a method.
Background
In chemical enterprises, circulating water fields are generally provided with circulating water filters, and the circulating water enters equipment by means of circulating water return pressure, is intercepted by filter material adsorption, and achieves the purpose of removing suspended matters. After the filter material runs for a period of time, the filter material must be backwashed to avoid the increase of running resistance and influence on the filtering effect, but when the backwashing procedure is started, the judgment is usually carried out by means of visual observation and subjective experience, and the efficient running of equipment cannot be ensured.
In addition, during backwashing, the filter material is difficult to clean only by means of circulating water pressure backwashing, the filter material is easy to harden after long-time operation, backwashing is difficult, the filtering effect is influenced, the water quality of discharged water is reduced, and equipment failure is caused in serious cases.
Disclosure of Invention
In order to solve the problems existing in the background technology, the invention provides a filtering and backwashing device, which comprises a cylinder body and a fluid inlet and outlet arranged on the cylinder body, wherein the fluid inlet and outlet comprises a first water pipe and a second water pipe which are communicated with the fluid inlet and outlet, a filter material layer arranged in the cylinder body and a stirring device; the water pipe I is provided with a filtering inlet and a backwashing outlet, and the water pipe II is provided with a filtering outlet and a backwashing inlet; the filter inlet, the backwashing outlet, the filter outlet and the backwashing inlet are provided with a plurality of valves, and the water inlet and outlet states of the first water pipe and the second water pipe are switched by the switch of the valves: in the filtering process, the water inlet pipe is used as a water inlet pipe, and in the back washing process, the water outlet pipe is used as a water outlet pipe; in the filtering process, it is used as a water outlet pipe, and in the back flushing process, it is used as a water inlet pipe.
The stirring device comprises a plurality of blades distributed along the circumference, and a plurality of sand-casting claws are arranged on the blades; the filter material layer comprises a fine sand layer, and a blade of the stirring device is arranged above the fine sand layer; and pressure sensors are arranged at the positions of the fluid inlet and the fluid outlet of the cylinder body and are used for monitoring the inlet pressure and the outlet pressure of the fluid in real time.
In a preferred scheme, 6 paddles are uniformly arranged at an interval of 60 degrees.
In the preferred scheme, the founding claws are made of crescent stainless steel materials, and each blade is provided with 3-6 founding claws.
In a preferred scheme, a water distributor communicated with the water pipe I is arranged in the barrel.
In a preferred scheme, a filter cap is installed on the cylinder body.
In a preferred scheme, the filter material layer comprises a fine sand layer, a medium sand/coarse sand layer and a cobble layer which are arranged from top to bottom.
In a preferable scheme, a driving mechanism of the stirring device is further arranged; the driving mechanism comprises a motor and a speed reducer which are connected to the outer wall of the cylinder body, and the speed reducer is connected with the paddle through a rotating shaft and a reversing gear and used for providing power for the paddle.
In a preferable scheme, the device is further provided with a control system, and the control system is electrically connected with the motor, the valves on the first water pipe and the second water pipe and the pressure sensor.
The use method of the filtering and backwashing device comprises the following steps:
s1: filtering; the control system sequentially opens valves at a filtering outlet and a filtering inlet through an actuating mechanism, circulating water of the circulating water return header pipe enters the water distributor and the filter material layer of the cylinder from the filtering inlet, is filtered by the filter material layer and then flows back to the reservoir from the filtering outlet to finish a filtering process;
s2, setting a pressure difference threshold epsilon of the positions of the fluid inlet and the fluid outlet in the cylinder; the control system monitors the pressure difference delta P of the inlet and outlet positions of the fluid in the cylinder in real time through the pressure sensor; when the | delta P | ≦ epsilon, S1 is continuously executed; when the absolute value delta P is larger than epsilon, switching to a backwashing procedure;
s3: backwashing; the control system closes the valves at the filtration outlet and the filtration inlet through the actuating mechanism, and sequentially opens the valves at the backwashing inlet and the backwashing outlet; circulating water enters the cylinder from the backwashing inlet; the control system controls the motor of the driving mechanism to start, drives the paddle of the stirring mechanism to rotate, and the sand-casting claw stirs the fine sand layer to realize back washing of the filter material layer from bottom to top, so that the adhered substance is fully separated from the filter material and is discharged out of the cylinder body together with the back washing water through the back washing outlet;
s4: setting the minimum time t of the backwashing procedure, and maintaining the backwashing procedure within the time t;
s5: after the duration time of the backwashing procedure exceeds t, if | delta P | is less than or equal to epsilon, S6 is executed; after the duration time of the backwashing process exceeds t, if the | delta P | is more than epsilon, the backwashing process is continuously maintained, and when the | delta P | is less than or equal to epsilon, S6 is executed;
s6: the control system closes the drive mechanism, closes the valves at the backwash inlet, backwash outlet, and switches to S1.
In a preferred embodiment, ε in step S2 is set to 0.1MPa, and t in step S4 is set to 600 seconds.
The invention achieves the following beneficial effects:
firstly, the invention designs a filtering and backwashing device, and the filtering and backwashing states can be automatically switched in one set of device according to set conditions. In a long-term filtering process, when suspended matters in water flow through the filtering layer, flocculated suspended matters in water and the surface of the filtering material are adhered to each other, the resistance on the surface of the filtering material layer is continuously increased, the water outlet flow is reduced, and circulating water generates pressure difference between the filtering inlet pipe and the filtering outlet pipe.
Secondly, if the filter material is difficult to clean by backwashing only by the pressure of circulating water, the filter material is easy to harden, so that the backwashing is difficult, the filtering effect is influenced, the quality of outlet water is reduced, and the equipment can also be failed after long-term backwashing. Because most of the trapped impurities are attached to the fine sand layer, in order to discharge the impurities out of the equipment body more completely, the invention designs the side-feeding type stirring device which is provided with a plurality of blades with the founding claws, and the filter material layer is back-cleaned from bottom to top by the founding claws while stirring, so that the adhered substances are fully separated from the filter material, the filtering effect is improved, and the service life is prolonged.
Drawings
FIG. 1 is a schematic front view of the filtering and backwashing apparatus of the present invention;
FIG. 2 is a schematic left side view of the filtration and backwash assembly of the present invention;
fig. 3 is a schematic top view of the filtering and backwashing device of the present invention.
In the figure:
1. a barrel; 2. a first water pipe; 3. a second water pipe; 4. a cylinder top flange; 5. a cylinder bottom flange; 6. a filtration inlet; 7. a backwash outlet; 8. backwashing the inlet; 9. a filtration outlet; 10. a pressure sensor; 11. a motor; 12. a speed reducer; 13. a founding claw; 14. a fine sand layer; 15. medium/coarse sand layers; 16. a cobble layer; 17. a filter cap; 18. a partition plate; 19. a brace; 20. a hoisting ring; 21. a water distributor; 22. an upper manhole; 23. a discharge opening; 24. a lower manhole; 25. a window; 26. and supporting the connecting piece.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the present invention provides a filtering and backwashing device, which includes a cylinder 1 and a fluid inlet and a fluid outlet disposed on the cylinder 1. The upper part and the lower part of the cylinder body 1 are respectively provided with a cylinder body top flange 4, a lifting ring 20, a cylinder body bottom flange 5 and a discharge opening 23, the flanges are used for installing and fixing the cylinder body 1, and the lifting ring 20 is used for lifting and transporting the cylinder body 1. The discharge opening 23 is used for changing the filter material. The bottom of the barrel 1 is provided with a supporting leg 19 for supporting the barrel 1. The cylinder body 1 is further provided with an upper manhole 22, a lower manhole 24 and a window 25, and manual maintenance is facilitated through the upper manhole 22 and the lower manhole 24. The window 25 is used for conveniently observing the filtering and back flushing conditions in the cylinder 1.
The device comprises a water pipe I2 and a water pipe II 3 which are communicated with a fluid inlet and a fluid outlet, a filter material layer arranged in a cylinder body 1 and a stirring device; the water pipe I2 is provided with a filtering inlet 6 and a backwashing outlet 7, and the water pipe II 3 is provided with a filtering outlet 9 and a backwashing inlet 8; the first water pipe 2 and the second water pipe 3 are fixed by a supporting connecting piece 26. A filter cap 17 is arranged in the cylinder 1 and used for preventing the filter material from flowing away along with water flow at the position of the partition plate during filtering and enabling water to be uniformly fed during backwashing; and a water distributor 21 communicated with the water pipe I is also arranged and used for enabling water to enter uniformly during filtering and preventing fine sand brought up by water flow from flowing away along with the water flow during backwashing.
Agitating unit has arranged a plurality of founding claw 13 including a plurality of paddles that distribute along the circumference on the paddle, and the shape and the materials of founding claw 13 can set up as required, and the stainless steel material of preferred selection crescent for use makes, is provided with 3 ~ 6 founding claws 13 on every paddle. The number of the paddles can be set according to requirements, and 6 paddles are preferably uniformly arranged at intervals of 60 degrees. The filter material layer comprises a fine sand layer 14, a medium sand/coarse sand layer 15 and a cobble layer 16 which are arranged from top to bottom. The paddle of the stirring device is preferably arranged above the fine sand layer 14, so that the fine sand can be loosened by stirring the paddle after the fine sand is taken up by water flow in backwashing; the sand-casting claw is inserted into the fine sand layer and used for turning and dispersing the fine sand which is formed into blocks and hardened into blocks so that the fine sand is more easily taken up by water flow, and the agglutinant and the filter material are more thoroughly separated during backwashing. And a pressure sensor 10 is arranged at the position of a fluid inlet and a fluid outlet of the cylinder body 1 and is used for monitoring the inlet pressure and the outlet pressure of the fluid in real time.
In addition, the device is also provided with a driving mechanism and a control system of the stirring device; the driving mechanism comprises a motor 11 and a speed reducer 12 which are connected to the outer wall of the barrel body 1, and the speed reducer 12 is connected with the paddle through a rotating shaft and a reversing gear and used for providing power for the paddle. The control system is electrically connected with the motor 11, the valves on the water pipe I2 and the water pipe II 3 and the pressure sensor 10.
The use process of the filtering and backwashing device of the invention is as follows:
starting a filtering process; the control system sequentially opens valves at the filtering outlet 9 and the filtering inlet 6 through an actuating mechanism, circulating water of the circulating water return header pipe enters the water distributor 21 and the filter material layer of the cylinder 1 from the filtering inlet 6, is filtered by the filter material layer and then flows back to the reservoir from the filtering outlet 9, and the filtering process is completed;
setting a pressure difference threshold epsilon of the positions of an inlet and an outlet of fluid in the cylinder 1; the control system monitors the pressure difference delta P of the inlet and outlet positions of the fluid in the cylinder 1 in real time through the pressure sensor 10; when the | delta P | is less than or equal to epsilon, the filtering procedure is continuously executed; when the absolute value delta P is larger than epsilon, switching to a backwashing procedure; wherein ε is preferably set to 0.1 MPa.
Starting a backwashing procedure; the control system closes the valves at the filtering outlet 9 and the filtering inlet 6 through the actuating mechanism, and opens the valves at the backwashing inlet 8 and the backwashing outlet 7 in sequence; circulating water enters the cylinder body 1 from the backwashing inlet 8; the control system controls the motor 11 of the driving mechanism to start, drives the paddle of the stirring mechanism to rotate, the sand-casting claw 13 stirs the fine sand layer 14, the back washing of the filter material layer from bottom to top is realized, the agglutinate is fully separated from the filter material, and the agglutinate and the back washing water are discharged out of the barrel 1 through a back washing outlet;
the minimum time t of the backwashing process is set, the backwashing process is maintained for the time t, and t is preferably set to 600 seconds according to practical experience. After the duration time of the backwashing procedure exceeds t, if | delta P | is less than or equal to epsilon, the control system closes the driving mechanism, closes the valves at the backwashing inlet and the backwashing outlet, and continues to enter the filtering procedure;
and if the duration of the backwashing procedure exceeds t, if the | delta P | is more than epsilon, continuously maintaining the backwashing procedure until the | delta P | is less than or equal to epsilon, closing the driving mechanism by the control system, closing the valves at the backwashing inlet and the backwashing outlet, and continuously entering the filtering procedure.
The above embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. Filtration, back washing unit, it includes the barrel and sets up the fluid exit on the barrel, its characterized in that, it includes:
a water pipe I and a water pipe II which are communicated with the fluid inlet and the fluid outlet, a filter material layer arranged in the cylinder body and a stirring device;
the water pipe I is provided with a filtering inlet and a backwashing outlet, and the water pipe II is provided with a filtering outlet and a backwashing inlet; the filter inlet, the backwashing outlet, the filter outlet and the backwashing inlet are provided with a plurality of valves, and the water inlet and outlet states of the first water pipe and the second water pipe are switched by the switch of the valves: in the filtering procedure, the first water pipe is used as a water inlet pipe, the second water pipe is used as a water outlet pipe, and in the backwashing procedure, the first water pipe is used as a water outlet pipe and the second water pipe is used as a water inlet pipe;
the stirring device comprises a plurality of blades distributed along the circumference, and a plurality of sand-casting claws are arranged on the blades;
the filter material layer comprises a fine sand layer, and a blade of the stirring device is arranged above the fine sand layer;
and pressure sensors are arranged at the positions of the fluid inlet and the fluid outlet of the cylinder body and are used for monitoring the inlet pressure and the outlet pressure of the fluid in real time.
2. The filtration and backwash device as claimed in claim 1, wherein: the blades are uniformly arranged at intervals of 60 degrees and are provided with 6 blades.
3. The filtration and backwash device as claimed in claim 1, wherein: the founding claw is made by the stainless steel material of crescent, is provided with 3 ~ 6 founding claws on every paddle.
4. The filtration and backwash device as claimed in claim 1, wherein: a water distributor communicated with the water pipe I is arranged in the barrel.
5. The filtration and backwash device as claimed in claim 4, wherein: and a filter cap is arranged on the cylinder body.
6. The filtration and backwash device as claimed in claim 5, wherein: the filter material layer comprises a fine sand layer, a medium sand/coarse sand layer and a cobble layer which are arranged from top to bottom.
7. The filtration and backwash device as claimed in claim 6, wherein: a driving mechanism of the stirring device is also arranged; the driving mechanism comprises a motor and a speed reducer which are connected to the outer wall of the cylinder body, and the speed reducer is connected with the paddle through a rotating shaft and a reversing gear and used for providing power for the paddle.
8. The filtration and backwash device as claimed in claim 7, wherein: the water pipe I and the water pipe II are connected with the motor through the water pipe I and the water pipe II.
9. A method of using a filtration and backwash apparatus according to claim 8, comprising the steps of:
s1: filtering; the control system sequentially opens valves at a filtering outlet and a filtering inlet through an actuating mechanism, circulating water of the circulating water return header pipe enters the water distributor and the filter material layer of the cylinder from the filtering inlet, is filtered by the filter material layer and then flows back to the reservoir from the filtering outlet to finish a filtering process;
s2, setting a pressure difference threshold epsilon of the positions of the fluid inlet and the fluid outlet in the cylinder; the control system monitors the pressure difference delta P of the inlet and outlet positions of the fluid in the cylinder in real time through the pressure sensor; when the | delta P | ≦ epsilon, S1 is continuously executed; when the absolute value delta P is larger than epsilon, switching to a backwashing procedure;
s3: backwashing; the control system closes the valves at the filtration outlet and the filtration inlet through the actuating mechanism, and sequentially opens the valves at the backwashing inlet and the backwashing outlet; circulating water enters the cylinder from the backwashing inlet; the control system controls the motor of the driving mechanism to start, drives the paddle of the stirring mechanism to rotate, and the sand-casting claw stirs the fine sand layer to realize back washing of the filter material layer from bottom to top, so that the adhered substance is fully separated from the filter material and is discharged out of the cylinder body together with the back washing water through the back washing outlet;
s4: setting the minimum time t of the backwashing procedure, and maintaining the backwashing procedure within the time t;
s5: after the duration time of the backwashing procedure exceeds t, if | delta P | is less than or equal to epsilon, S6 is executed; after the duration time of the backwashing process exceeds t, if the | delta P | is more than epsilon, the backwashing process is continuously maintained, and when the | delta P | is less than or equal to epsilon, S6 is executed;
s6: the control system closes the drive mechanism, closes the valves at the backwash inlet, backwash outlet, and switches to S1.
10. The method of claim 9, wherein in step S2, ε is set to 0.1MPa, and in step S4, t is set to 600 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611676.9A CN114904303A (en) | 2022-05-31 | 2022-05-31 | Filtering and backwashing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611676.9A CN114904303A (en) | 2022-05-31 | 2022-05-31 | Filtering and backwashing device and method |
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| Publication Number | Publication Date |
|---|---|
| CN114904303A true CN114904303A (en) | 2022-08-16 |
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ID=82769800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210611676.9A Pending CN114904303A (en) | 2022-05-31 | 2022-05-31 | Filtering and backwashing device and method |
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| Country | Link |
|---|---|
| CN (1) | CN114904303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117618999A (en) * | 2024-01-25 | 2024-03-01 | 四川贝克森云灌溉科技有限公司 | Automatic backwash sand stone type and lamination type combined filtering system for reservoir |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389658A (en) * | 2011-10-18 | 2012-03-28 | 江苏浩特隆搅拌设备有限公司 | Stirrer in stirring type multi-medium filter |
| CN111729359A (en) * | 2020-07-21 | 2020-10-02 | 肖云东 | Deep backwashing filter and backwashing method |
| CN217887098U (en) * | 2022-05-31 | 2022-11-25 | 利华益利津炼化有限公司 | Filtering and back-flushing device |
-
2022
- 2022-05-31 CN CN202210611676.9A patent/CN114904303A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389658A (en) * | 2011-10-18 | 2012-03-28 | 江苏浩特隆搅拌设备有限公司 | Stirrer in stirring type multi-medium filter |
| CN111729359A (en) * | 2020-07-21 | 2020-10-02 | 肖云东 | Deep backwashing filter and backwashing method |
| CN217887098U (en) * | 2022-05-31 | 2022-11-25 | 利华益利津炼化有限公司 | Filtering and back-flushing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117618999A (en) * | 2024-01-25 | 2024-03-01 | 四川贝克森云灌溉科技有限公司 | Automatic backwash sand stone type and lamination type combined filtering system for reservoir |
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