CN111530165A - Filter capable of adjusting density of filter medium - Google Patents
Filter capable of adjusting density of filter medium Download PDFInfo
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- CN111530165A CN111530165A CN202010451466.9A CN202010451466A CN111530165A CN 111530165 A CN111530165 A CN 111530165A CN 202010451466 A CN202010451466 A CN 202010451466A CN 111530165 A CN111530165 A CN 111530165A
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- filter
- discharge port
- barrel
- density
- filter barrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
- B01D36/045—Combination of filters with centrifugal separation devices
Abstract
The invention discloses a filter capable of adjusting the density of a filter medium, which comprises a filter barrel, wherein a screw rod is rotatably connected to the upper part in the filter barrel and is driven by a manual or electric mode, a pressing plate is fixed at the lower end of the screw rod, the filter medium is arranged between the pressing plate and a bottom plate of the filter barrel, an air injection pipe is arranged in the filter barrel, a clear water outlet is arranged on the side wall of the upper part of the filter barrel, a cyclone is arranged below the bottom of the filter barrel and is connected with a sewage inlet, a backwashing water inlet is arranged on the side wall of the filter barrel, a backwashing sewage outlet is arranged on the side wall of the filter barrel, and differential pressure sensors are arranged below the pressing plate and above the bottom plate of the. This filter can adjust filter medium's density, satisfies the filtration requirement of the sewage of different water physical characteristics, and it can also wash filter medium simultaneously, improves filter medium's life, and it is little to take up an area of the space, and is efficient, fortune dimension with low costs.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a filter capable of adjusting the density of a filter medium.
Background
The sewage treatment plant carries out standard-lifting water inlet and tail water treatment, river water purification treatment, rainwater discharge outlet treatment, rainwater and sewage confluence overflow treatment and water inlet treatment of a water supply plant, and a filtering device is required, and the sewage treatment plant generally adopts a membrane method, such as an MBR (membrane bioreactor) process. Although the membrane method has high treatment efficiency, the method has large investment, high operation and maintenance cost and short service life and is not easy to popularize. Most of river water purification adopts integrated equipment, and the integrated equipment mainly comprises two types of magnetic separation and rapid flocculation and precipitation. Because the operation and maintenance cost is too high, the emergency treatment device can only be used as a temporary emergency treatment device, and can treat the symptoms and the root causes. Most rainwater treatment adopts sand filtration or sedimentation. The sand filtration occupies a large area, and the sand filtration can be placed in a place which can not be found at the discharge port, so the sand filtration is hardly adopted in China. The sediment is high in cost and high in operation and maintenance cost, and can become a pollution source if the sediment is not maintained properly. Rain and sewage confluence overflow is the biggest problem in black and odorous river treatment, the method adopted at present is storage pond regulation and rapid flocculation and precipitation, the construction and operation and maintenance costs are high, and the method can only be popularized in big cities almost. Water works generally adopt sand filtration and membrane methods to treat inlet water, and either occupy large area or have high construction, operation and maintenance cost. The filter usually uses a filter medium for filtering, the density of the filter medium has a direct relation with the removal efficiency of pollutants, the higher the density is, the higher the removal rate is, but the high density inevitably causes flow reduction, is easy to block and influences the service life of the filter medium, while the density of the filter medium of the existing filter is fixed, the density of the filter medium can not be adjusted according to the water treatment characteristics of sewage to achieve the treatment target, and the universality is lower.
Disclosure of Invention
The invention aims to provide a filter capable of adjusting the density of a filter medium, which can adjust the density of the filter medium, meet the filtering requirements of sewage with different water physical characteristics, and can flush the filter medium to prolong the service life of the filter medium.
The technical problem to be solved by the invention is realized by the following technical scheme:
a filter capable of adjusting density of a filter medium comprises a filter barrel, wherein a screw rod is rotatably connected to the upper part in the filter barrel and driven in a manual or electric mode, a pressing plate is fixed at the lower end of the screw rod, filter holes are respectively and uniformly distributed on the pressing plate and the bottom plate of the filter barrel, the filter medium is arranged between the pressing plate and the bottom plate of the filter barrel, an air injection pipe is arranged above the bottom plate in the filter barrel and penetrates out of the filter barrel to be connected with a compressed air pipe with an electromagnetic valve, a clear water outlet is arranged on the side wall of the upper part of the filter barrel, a cyclone is arranged below the bottom of the filter barrel, a sewage inlet is connected to the side surface of the cyclone, a sand discharge port is arranged at the bottom of the cyclone, a backwashing water inlet is arranged at the bottom of the side wall of the filter barrel, and a sewage outlet is arranged on the side wall of, the backwashing sewage outlet, the clear water outlet, the sewage inlet and the backwashing water inlet are respectively provided with a control valve, and differential pressure sensors are arranged below the pressing plate and above the bottom plate of the filter barrel.
Preferably, the upper portion of the filter vat is provided with a support, the support on rotate and be connected with the hand wheel, the lead screw pass the hand wheel and be connected with the hand wheel cooperation, filter vat top be provided with drive lead screw pivoted motor. This structural scheme design makes the lead screw both can adjust through manual and can also adjust through the motor to realize that manual or electronic mode drive clamp plate reciprocates.
Preferably, the backwash sewage discharge port comprises a backwash floater discharge port, a backwash suspended matter discharge port and a backwash sediment discharge port, and the backwash floater discharge port, the backwash suspended matter discharge port and the backwash sediment discharge port are sequentially distributed on the side wall of the filter barrel from top to bottom. The design of the structural scheme is favorable for discharging dirty water after washing the filter medium from the lower, middle and upper water outlets respectively according to the difference of the sedimentation suspension property and the floatability of the dirty water, and the dirty water enters a sewage system to be classified conveniently.
Preferably, the control valve is an electric butterfly valve.
Preferably, a ball filtering net is arranged in front of the valve of the control valve. The filter net can effectively prevent large dirt from entering the filter barrel.
Preferably, the side wall of the filter vat is provided with an observation window. The observation window is convenient for the staff to observe the behavior in the filter vat.
Further preferably, the observation window comprises a convex pipe and a glass plate, the convex pipe is arranged on the side wall of the filter vat, a flange structure is arranged at one end, far away from the filter vat, of the convex pipe, and the glass plate is clamped on the convex pipe through a flange. The design of the structural scheme is convenient for the installation and the disassembly of the glass plate, thereby being convenient for wiping or replacing the glass plate.
Preferably, the sand outlet is provided with a star-shaped valve. The star valve plays a role in staged sand discharge.
Further preferably, a spiral slag extractor is arranged below the sand discharge port. The spiral slag remover is convenient for guiding out the sand discharged from the sand discharge port.
Has the advantages that: after the structure is adopted, the filter barrel is internally provided with the manual or electric driven pressing plate, and the density of the filter medium is changed by adjusting the position of the pressing plate, so that the filtering requirements of sewage with different water physical characteristics are met; meanwhile, a differential pressure sensor is arranged in the filter barrel, when the filter medium is too dirty, the filter medium is easy to block, the differential pressure sensor detects the resistance of the filter layer, the saturation of the filter layer is judged according to the differential pressure range, when the set value is reached, the valves of the sewage water inlet and the clear water outlet are closed, the pressing plate is lifted to the highest position, meanwhile, the filter barrel is filled with water through the backwashing water inlet, the backwashing water inlet is closed, compressed air is opened, the filter medium is washed under the impact of the compressed air, and after washing is finished, the filter work is continued from each backwashing sewage outlet, so that the service life of the filter medium is prolonged; the invention adopts the physical filtration principle, does not need to add any chemical agent, has no other operation and maintenance cost except energy consumption, and has low operation and maintenance cost, high cost performance, small occupied space and high efficiency.
Drawings
Fig. 1 is a schematic structural view of a filter capable of adjusting the density of a filter medium according to the present invention.
Wherein: 1-filter vat, 2-lead screw, 3-clamp plate, 4-jet stack, 5-clear water discharge port, 6-swirler, 7-sewage inlet, 8-sand discharge port, 9-backwash water inlet, 10-support, 11-hand wheel, 12-motor, 13-backwash floater discharge port, 14-backwash suspended matter discharge port, 15-backwash sediment discharge port, 16-observation window, 17-spiral mucking machine.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, which are not intended to limit the invention in any manner.
Example 1
As shown in figure 1, the filter capable of adjusting the density of the filter medium comprises a filter vat 1, wherein a screw rod 2 is connected to the upper portion of the interior of the filter vat 1 in a rotating mode, the screw rod 2 is driven in a manual or electric mode, a support 10 is arranged above the filter vat 1, a hand wheel 11 is connected to the support 10 in a rotating mode, the screw rod 2 penetrates through the hand wheel 11 and is connected with the hand wheel 11 in a matching mode, a motor 12 for driving the screw rod 2 to rotate is arranged above the filter vat 1, a gear is connected to the screw rod 2 in a matching mode, and the motor 12 drives the gear to rotate so as to drive the screw rod 2 to move up and down. The lower end of the screw rod 2 is fixed with a pressing plate 3, the pressing plate 3 and the bottom plate of the filter barrel 1 are respectively and uniformly distributed with filter holes, a filter medium is arranged between the pressing plate 3 and the bottom plate of the filter barrel 1, an air injection pipe 4 is arranged above the bottom plate in the filter barrel 1, the air injection pipe 4 penetrates through the filter barrel 1 and is connected with a compressed air pipe with an electromagnetic valve, the upper side wall of the filter barrel 1 is provided with a clean water outlet 5, a cyclone 6 is arranged below the bottom of the filter barrel 1, the side surface of the cyclone 6 is connected with a sewage inlet 7, the bottom of the cyclone 6 is provided with a sand discharge port 8, the bottom of the side wall of the filter barrel 1 is provided with a backwashing water inlet 9, the side wall of the filter barrel 1 is provided with a backwashing sewage outlet, the backwashing sewage outlet and the clean water outlet 5, the sewage inlet 7 and the backwashing water inlet 9, and differential pressure sensors are arranged below the pressing plate 3 and above the bottom plate of the filter barrel 1.
Example 2
The filter capable of adjusting the density of the filter medium comprises a filter barrel 1, wherein a screw rod 2 is rotatably connected to the upper portion of the interior of the filter barrel 1, the screw rod 2 is driven in a manual or electric mode, a support 10 is arranged above the filter barrel 1, a hand wheel 11 is rotatably connected to the support 10, the screw rod 2 penetrates through the hand wheel 11 and is connected with the hand wheel 11 in a matched mode, and a motor 12 for driving the screw rod 2 to rotate is arranged above the filter barrel 1. The lower end of the screw rod 2 is fixed with a pressing plate 3, filter holes are respectively and uniformly distributed on the pressing plate 3 and the bottom plate of the filter barrel 1, a filter medium is arranged between the pressing plate 3 and the bottom plate of the filter barrel 1, an air injection pipe 4 is arranged above the bottom plate in the filter barrel 1, the air injection pipe 4 penetrates out of the filter barrel 1 and is connected with a compressed air pipe with an electromagnetic valve, the upper side wall of the filter barrel 1 is provided with a clean water outlet 5, a cyclone 6 is arranged below the bottom of the filter barrel 1, the side surface of the cyclone 6 is connected with a sewage inlet 7, the bottom of the cyclone 6 is provided with a sand discharge port 8, the bottom of the side wall of the filter barrel 1 is provided with a backwashing water inlet 9, the side wall of the filter barrel 1 is provided with a backwashing sewage outlet, and the backwashing sewage outlet comprises a backwashing floater outlet 13, A backwashing suspended matter discharge port 14 and a backwashing sediment discharge port 15, wherein the backwashing floating matter discharge port 13, the backwashing suspended matter discharge port 14 and the backwashing sediment discharge port 15 are sequentially distributed on the side wall of the filter barrel 1 from top to bottom. The backwashing sewage outlet, the clear water outlet 5, the sewage inlet 7 and the backwashing water inlet 9 are respectively provided with a control valve, and the control valves are electric butterfly valves. A ball filtering net is arranged in front of the control valve. And differential pressure sensors are arranged below the pressing plate 3 and above the bottom plate of the filter barrel 1.
Example 3
The filter capable of adjusting the density of the filter medium comprises a filter barrel 1, wherein a screw rod 2 is rotatably connected to the upper portion of the interior of the filter barrel 1, the screw rod 2 is driven in a manual or electric mode, a support 10 is arranged above the filter barrel 1, a hand wheel 11 is rotatably connected to the support 10, the screw rod 2 penetrates through the hand wheel 11 and is connected with the hand wheel 11 in a matched mode, and a motor 12 for driving the screw rod 2 to rotate is arranged above the filter barrel 1. The lower end of the screw rod 2 is fixed with a pressing plate 3, filter holes are respectively and uniformly distributed on the pressing plate 3 and the bottom plate of the filter barrel 1, a filter medium is arranged between the pressing plate 3 and the bottom plate of the filter barrel 1, an air injection pipe 4 is arranged above the bottom plate in the filter barrel 1, the air injection pipe 4 penetrates out of the filter barrel 1 and is connected with a compressed air pipe with an electromagnetic valve, the upper side wall of the filter barrel 1 is provided with a clean water outlet 5, a cyclone 6 is arranged below the bottom of the filter barrel 1, the side surface of the cyclone 6 is connected with a sewage inlet 7, the bottom of the cyclone 6 is provided with a sand discharge port 8, the bottom of the side wall of the filter barrel 1 is provided with a backwashing water inlet 9, the side wall of the filter barrel 1 is provided with a backwashing sewage outlet, and the backwashing sewage outlet comprises a backwashing floater outlet 13, A backwashing suspended matter discharge port 14 and a backwashing sediment discharge port 15, wherein the backwashing floating matter discharge port 13, the backwashing suspended matter discharge port 14 and the backwashing sediment discharge port 15 are sequentially distributed on the side wall of the filter barrel 1 from top to bottom. The backwashing sewage outlet, the clear water outlet 5, the sewage inlet 7 and the backwashing water inlet 9 are respectively provided with a control valve, the control valve is an electric butterfly valve, and a filter screen net is arranged in front of the control valve. And differential pressure sensors are arranged below the pressing plate 3 and above the bottom plate of the filter barrel 1. The side wall of the filter vat 1 is provided with an observation window 16. The observation window 16 comprises a convex pipe and a glass plate, the convex pipe is arranged on the side wall of the filter vat 1, a flange structure is arranged at one end, away from the filter vat 1, of the convex pipe, and the glass plate is clamped on the convex pipe through a flange.
Example 4
The filter capable of adjusting the density of the filter medium comprises a filter barrel 1, wherein a screw rod 2 is rotatably connected to the upper portion of the interior of the filter barrel 1, the screw rod 2 is driven in a manual or electric mode, a support 10 is arranged above the filter barrel 1, a hand wheel 11 is rotatably connected to the support 10, the screw rod 2 penetrates through the hand wheel 11 and is connected with the hand wheel 11 in a matched mode, and a motor 12 for driving the screw rod 2 to rotate is arranged above the filter barrel 1. 2 lower extreme of lead screw be fixed with clamp plate 3, the bottom plate of clamp plate 3 and filter vat 1 evenly distributed respectively have the filtration pore, clamp plate 3 and filter vat 1's bottom plate between be provided with filter medium, filter vat 1 in bottom plate top be provided with jet-propelled pipe 4, jet-propelled pipe 4 wear out filter vat 1 and connect in the compressed air pipe that has the solenoid valve, the upper portion lateral wall of filter vat 1 be provided with clear water discharge port 5, filter vat 1's bottom below be provided with swirler 6, swirler 6's side be connected with sewage water inlet 7, swirler 6's bottom be provided with row sand mouth 8, row sand mouth 8 be provided with the star valve. And a spiral slag extractor 17 is arranged below the sand discharge port 8. The backwashing water inlet 9 is arranged at the bottom of the side wall of the filter barrel 1, the backwashing sewage outlet is arranged on the side wall of the filter barrel 1, the backwashing sewage outlet comprises a backwashing floater outlet 13, a backwashing suspended matter outlet 14 and a backwashing sediment outlet 15, and the backwashing floater outlet 13, the backwashing suspended matter outlet 14 and the backwashing sediment outlet 15 are sequentially distributed on the side wall of the filter barrel 1 from top to bottom. The backwashing sewage outlet, the clear water outlet 5, the sewage inlet 7 and the backwashing water inlet 9 are respectively provided with a control valve, the control valve is an electric butterfly valve, and a filter screen net is arranged in front of the control valve. And differential pressure sensors are arranged below the pressing plate 3 and above the bottom plate of the filter barrel 1. The side wall of the filter vat 1 is provided with an observation window 16. The observation window 16 comprises a convex pipe and a glass plate, the convex pipe is arranged on the side wall of the filter vat 1, a flange structure is arranged at one end, away from the filter vat 1, of the convex pipe, and the glass plate is clamped on the convex pipe through a flange.
The working principle is as follows: when the device works, according to the water conservancy characteristics of filtered sewage, the height position of the pressing plate 3 is adjusted through the hand wheel 11 or the motor 12, so that the density of a filter medium is adjusted, the sewage enters the cyclone 6 from the water inlet 7, the cyclone 6 firstly separates small-particle silt and discharges the silt from the silt discharge port 8, the star-shaped valve of the silt discharge port 8 discharges the fine silt in a staged manner and guides the fine silt out through the spiral slag extractor 17, the sewage enters the filter medium through the bottom plate of the filter barrel 1 for filtering, the filtered clean water is discharged from the clean water discharge port 5, the pressure difference sensor detects the resistance of the filter layer, the saturation of the filter layer is judged according to the pressure difference range, when the set value is reached, the valves of the sewage inlet 7 and the clean water discharge port 5 are closed, the pressing plate 3 is lifted to the highest position, meanwhile, the filter barrel 1 is filled with water through the backwashing water inlet, compressed air is used for impacting and washing the filter medium through the air injection pipe 4, and after washing is finished, the washed sewage is discharged from each backwashing sewage outlet to continue filtering.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts of the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. The filter capable of adjusting the density of the filter medium is characterized by comprising a filter vat (1), a screw rod (2) is rotatably connected to the upper part in the filter vat (1), the screw rod (2) is driven in a manual or electric mode, a pressing plate (3) is fixed at the lower end of the screw rod (2), filter holes are respectively and uniformly distributed on the pressing plate (3) and the bottom plate of the filter vat (1), the filter medium is arranged between the pressing plate (3) and the bottom plate of the filter vat (1), an air injection pipe (4) is arranged above the bottom plate in the filter vat (1), the air injection pipe (4) penetrates out of the filter vat (1) and is connected with a compressed air pipe with an electromagnetic valve, a clear water outlet (5) is arranged on the side wall of the upper part of the filter vat (1), a swirler (6) is arranged below the bottom part of the filter vat (1), the side of the cyclone (6) is connected with a sewage inlet (7), the bottom of the cyclone (6) is provided with a sand discharge port (8), the bottom of the side wall of the filter barrel (1) is provided with a backwashing water inlet (9), the side wall of the filter barrel (1) is provided with a backwashing sewage discharge port, the backwashing sewage discharge port and the clear water discharge port (5) are respectively provided with a control valve, and pressure difference sensors are arranged below the pressing plate (3) and above the bottom plate of the filter barrel (1).
2. The filter capable of adjusting the density of the filter medium according to claim 1, wherein a support (10) is arranged above the filter barrel (1), a hand wheel (11) is rotatably connected to the support (10), the screw rod (2) penetrates through the hand wheel (11) and is in fit connection with the hand wheel (11), and a motor (12) for driving the screw rod (2) to rotate is arranged above the filter barrel (1).
3. The filter capable of adjusting the density of the filter medium according to claim 1, wherein the backwash sewage discharge port comprises a backwash floater discharge port (13), a backwash suspended matter discharge port (14) and a backwash sediment discharge port (15), and the backwash floater discharge port (13), the backwash suspended matter discharge port (14) and the backwash sediment discharge port (15) are sequentially distributed on the side wall of the filter barrel (1) from top to bottom.
4. The adjustable filter media density filter of claim 1, wherein the control valve is an electrically operated butterfly valve.
5. The adjustable filter media density filter of claim 1, wherein the control valve is provided with a ball screen in front of the valve.
6. Filter media density adjustable filter according to claim 1, characterised in that the side walls of the filter vat (1) are provided with viewing windows (16).
7. The filter with the adjustable density of the filter medium as claimed in claim 6, wherein the observation window (16) comprises a convex pipe and a glass plate, the side wall of the filter vat (1) is provided with the convex pipe, one end of the convex pipe, far away from the filter vat (1), is provided with a flange structure, and the glass plate is clamped on the convex pipe through a flange.
8. Filter media density adjustable filter according to claim 1, wherein the sand discharge (8) is provided with a star valve.
9. Filter medium density adjustable filter according to claim 1, characterised in that a screw tap (17) is arranged below the sand discharge opening (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010451466.9A CN111530165A (en) | 2020-05-25 | 2020-05-25 | Filter capable of adjusting density of filter medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010451466.9A CN111530165A (en) | 2020-05-25 | 2020-05-25 | Filter capable of adjusting density of filter medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111530165A true CN111530165A (en) | 2020-08-14 |
Family
ID=71970924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010451466.9A Pending CN111530165A (en) | 2020-05-25 | 2020-05-25 | Filter capable of adjusting density of filter medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111530165A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159705A (en) * | 2022-07-28 | 2022-10-11 | 珠海市清创智慧海绵技术研究院有限公司 | Double-medium filter capable of adjusting density of filter medium |
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| CN2435387Y (en) * | 2000-07-05 | 2001-06-20 | 曾金华 | Oil-water separator for treatment and reuse of oil-containing sewage |
| CN102107100A (en) * | 2009-12-25 | 2011-06-29 | 天津富斯特环保设备有限公司 | Differential-pressure swirl-type backwashing filtration system |
| CN103842046A (en) * | 2011-10-03 | 2014-06-04 | 株式会社石垣 | Indefinite form filter medium layer and filter device provided with same |
| JP6124426B1 (en) * | 2016-01-13 | 2017-05-10 | 株式会社ナチュラルウィル | Filter for water purifier |
| CN106669243A (en) * | 2015-11-09 | 2017-05-17 | 李晶 | Novel cyclone sand-water separator |
| CN109694116A (en) * | 2019-01-18 | 2019-04-30 | 北京京润水务有限公司 | A kind of compounded mix unit, dynamic oil-water separating device and separation method using it |
| US10399881B2 (en) * | 2016-12-14 | 2019-09-03 | General Electric Company | Methods and systems for separating solid particulates from waste water |
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2020
- 2020-05-25 CN CN202010451466.9A patent/CN111530165A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2435387Y (en) * | 2000-07-05 | 2001-06-20 | 曾金华 | Oil-water separator for treatment and reuse of oil-containing sewage |
| CN102107100A (en) * | 2009-12-25 | 2011-06-29 | 天津富斯特环保设备有限公司 | Differential-pressure swirl-type backwashing filtration system |
| CN103842046A (en) * | 2011-10-03 | 2014-06-04 | 株式会社石垣 | Indefinite form filter medium layer and filter device provided with same |
| CN106669243A (en) * | 2015-11-09 | 2017-05-17 | 李晶 | Novel cyclone sand-water separator |
| JP6124426B1 (en) * | 2016-01-13 | 2017-05-10 | 株式会社ナチュラルウィル | Filter for water purifier |
| US10399881B2 (en) * | 2016-12-14 | 2019-09-03 | General Electric Company | Methods and systems for separating solid particulates from waste water |
| CN109694116A (en) * | 2019-01-18 | 2019-04-30 | 北京京润水务有限公司 | A kind of compounded mix unit, dynamic oil-water separating device and separation method using it |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159705A (en) * | 2022-07-28 | 2022-10-11 | 珠海市清创智慧海绵技术研究院有限公司 | Double-medium filter capable of adjusting density of filter medium |
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Application publication date: 20200814 |
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| RJ01 | Rejection of invention patent application after publication |