CN114588670A - Filter and filtering method - Google Patents
Filter and filtering method Download PDFInfo
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- CN114588670A CN114588670A CN202210117071.4A CN202210117071A CN114588670A CN 114588670 A CN114588670 A CN 114588670A CN 202210117071 A CN202210117071 A CN 202210117071A CN 114588670 A CN114588670 A CN 114588670A
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- filter
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- 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
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a filter and a filtering method, and belongs to the technical field of environmental protection. The problem of current filter precision low, cause the filter material to lose or the filter material hardens during the back flush is solved. The AFM filter comprises a filter cylinder, a filtered water tank, a water purification tank and a security filter, wherein the filter cylinder is divided into an upper area and a lower area by arranging a partition plate at the middle lower part in the filter cylinder, a plurality of filter caps are uniformly distributed on the partition plate, AFM filter materials are paved in the upper area, a ring-shaped overflow groove is arranged at the upper part of the inner wall of the filter cylinder, a water inlet of the filter cylinder is communicated with the filtered water tank through a water inlet pipe, a water outlet of the filter cylinder is communicated with the water purification tank through a water outlet pipe, and the security filter is communicated with the ring-shaped overflow groove through a back flush water outlet pipe. The invention can be widely used for high-efficiency treatment of various waste water; the filtering precision reaches about 5 microns; the automatic operation can be realized; the filtered suspended solid can be cleaned and collected and the backwashing water can be recycled.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a filter and a filtering method.
Background
Currently, quartz sand filters are commonly used in filtration treatment of industrial circulating water, sewage, reclaimed water, and swimming pool water, but such filters have many problems: (1) the filtering precision is low, and the filter can only filter suspended matters, organic matters and colloidal particles with larger particle sizes. (2) When the filter is backwashed, if the pressure is high, fine particles of the quartz sand filter material can be brought out, so that the loss of the quartz sand filter material is caused; when the pressure is low, the larger quartz sand filter material at the lower part cannot be loosened, and the quartz sand is easy to harden. (3) The quartz sand is easy to harden to cause wormholes to be generated, and an anaerobic zone is formed in the filter bed so as to destroy the filtering effect; after the sand hardening, a large amount of pathogens such as legionella, amoeba and the like can be cultured more easily. Therefore, it is highly desirable to develop a new filter apparatus that avoids the above problems.
Disclosure of Invention
In view of the above, the invention aims to provide a filter and a filtering method, which solve the problems of low filtering precision and filter material loss or filter material hardening caused by backwashing of the existing filter, and can be used for widely and efficiently treating surface water, underground water, pre-membrane pretreatment water, swimming pool water, aquaculture, industrial water and wastewater; the filtering precision reaches about 5 microns; the automatic operation can be realized; the filtered suspended solid can be cleaned and collected and the backwashing water can be recycled.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a filter comprises a filter cylinder, a filtered water tank, a water purification tank and a security filter, wherein the filter cylinder is divided into an upper area and a lower area by a partition plate arranged at the middle lower part in the filter cylinder, a plurality of filter caps are uniformly distributed on the partition plate, AFM filter materials are paved in the upper area, an annular overflow tank is arranged at the upper part of the inner wall of the filter cylinder, a water inlet at the upper part of the filter cylinder is communicated with the filtered water tank through a water inlet pipe, a water inlet pump, a Y-shaped filter valve I and an electric ball valve I are arranged on the water inlet pipe, a water outlet at the bottom of the filter cylinder is communicated with the water purification tank through a water outlet pipe, the water purification tank is communicated with the bottom of the filter cylinder through a back flush water inlet pipe, an electric ball valve III and a lower pressure gauge are arranged on a water outlet pipe, a back flush pump, a Y-shaped filter valve II and an electric ball valve II are arranged on the back flush water inlet pipe, the water inlet of the security filter is communicated with the annular overflow groove through a back flush water outlet pipe, an electric ball valve IV is arranged on the back flush water outlet pipe, the water outlet of the security filter is communicated with a purified water tank through a pipeline, an upper pressure gauge is arranged at the upper end of a filter cylinder, a pressure comparator is connected between the upper pressure gauge and the lower pressure gauge and connected with a controller, and the controller controls the pumps and the electric ball valves to be opened and closed.
Furthermore, a water baffle is arranged at the water inlet close to the upper part of the filter cylinder body in the filter cylinder body and is opposite to the water inlet.
Furthermore, a first manual valve is arranged on the water inlet pipe, and a second manual valve is arranged on the water outlet pipe.
Furthermore, a sewage discharge pipeline and a water discharge pipeline are arranged at the bottom of the filter cylinder, a sewage discharge valve is arranged on the sewage discharge pipeline, a first water discharge valve is arranged on the water discharge pipeline, and a ceramic filter element is arranged in the lower area of the filter cylinder, which is opposite to the water discharge pipeline.
Furthermore, a second water drain valve is arranged on the pipeline.
Furthermore, the annular overflow groove is arranged above the AFM filter material, and the outer wall of the annular overflow groove is welded on the inner wall of the filter cylinder.
Furthermore, the first Y-shaped filter valve is arranged close to a water outlet of the filtered water pool, and the second Y-shaped filter valve is arranged close to a water outlet of the purified water pool.
Furthermore, a bracket is arranged at the outer bottom of the filter cylinder body.
Furthermore, a manhole is arranged at the upper end of the filter cylinder, a side manhole is arranged on the side wall of the filter cylinder, and a sight glass is arranged on the filter cylinder.
A filtering method adopts the filter, and specifically comprises the following steps:
firstly, a water inlet process:
the controller controls the second electric ball valve and the fourth electric ball valve to be closed, the third electric ball valve and the first electric ball valve to be opened, the first manual valve is in a normally open state, the water inlet pump is started, water to be filtered in the filtered water pool sequentially passes through the first Y-shaped filter valve, the first manual valve, the water inlet pump and the first electric ball valve through the water inlet pipe to enter the filter cylinder, and the water to be filtered is sprayed to the AFM filter material after colliding with the water baffle and starts to be filtered;
II, filtering:
water to be filtered entering the filter cylinder is filtered by the AFM filter material, enters the lower area of the filter cylinder through a plurality of filter caps, then flows into the water purification tank through the water outlet pipe and the electric ball valve, and is filtered;
thirdly, backwashing:
the manual valve II is in a normally open state, after a pressure comparator carries out logic ratio on the upper pressure meter and the lower pressure meter, if a set value is reached, the controller controls the start of a backwashing process, the backwashing pump is started, the electric ball valve II and the electric ball valve IV are started, the water inlet pump, the electric ball valve III and the electric ball valve I are closed, backwashing water enters the filter cylinder body through the Y-shaped filter valve II, the manual valve II, the electric ball valve II and the backwashing water pipe, the filter cap and the AFM filter material are subjected to backwashing, solid suspended particles are flushed into the annular overflow tank by the backwashing water, the annular overflow tank is communicated with the backwashing water outlet pipe, the solid suspended particles are injected into the security filter along the backwashing water outlet pipe and the electric ball valve IV, the solid filtered by the security filter is retained in the filter screen, and clean water returns to the clean water tank through the second water drain valve and the pipeline, so that backwashing is realized.
Compared with the prior art, the filter and the filtering method have the beneficial effects that:
(1) the biological resistance and the self-disinfection performance are realized by selecting filter materials with proper proportion and adopting vibration discharging during filling, and the filtering precision reaches 5 microns;
(2) the equipment can automatically run, the operation is unmanned, and the running cost is saved by more than 35%;
(3) the filtered suspended solid can be cleaned and collected and the backwashing can be recycled, and the using amount can be reduced by more than 5%.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a filter according to an embodiment of the present invention;
FIG. 2 is a flow chart of a water inlet process according to an embodiment of the present invention;
FIG. 3 is a flow chart of a filtering process according to an embodiment of the present invention;
fig. 4 is a flow chart of a backwash process according to an embodiment of the present invention.
Description of reference numerals:
1. a filter cylinder; 2. an exhaust valve; 3. a manhole; 4. a pressure gauge is arranged; 5. a water baffle; 6. a ring-shaped overflow trough; 7. a water inlet pipe; 8. a sight glass; 9. a filter cap; 10. a first electric ball valve; 11. a water inlet pump; 12. a first manual valve; 13. a first Y-shaped filter valve; 14. a filtered water tank; 15. a second Y-shaped filter valve; 16. a second manual valve; 17. a backwash pump; 18. a second electric ball valve; 19. backwashing the water inlet pipe; 20. a support; 21. a water outlet pipe; 22. an electric ball valve III; 23. a lower pressure gauge; 24. a ceramic filter element; 25. a first water drain valve; 26. a water purification pool; 27. a second water drain valve; 28. a security filter; 29. an electric ball valve IV; 30. backwashing the water outlet pipe; 31. a pressure comparator; 32. a side manhole; 33. AFM filtering material; 34. a blowoff valve.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
As shown in fig. 1, a filter comprises a filter cylinder 1, a filtered water tank 14, a purified water tank 26 and a security filter 28, wherein the filter cylinder 1 is divided into an upper area and a lower area by arranging a partition plate at the middle lower part in the filter cylinder 1, a plurality of filter caps 9 are uniformly distributed on the partition plate, an AFM filter material 33 is laid in the upper area, a plurality of layers of AFM filter materials 33 are laid from top to bottom, the particle size of each layer is gradually reduced, and the proportion of the AFM filter materials is as follows: no. 0, No. 50, No. 1, No. 30, No. 2, No. 10 and No. 3, wherein the upper part of the inner wall of the filter cylinder body 1 is provided with an annular overflow trough 6, the water inlet at the upper part of the filter cylinder body 1 is communicated with a filtered water tank 14 through a water inlet pipe 7, the water inlet pipe 7 is provided with a water inlet pump 11, a Y-shaped filter valve 13 and an electric ball valve 10, the water outlet at the bottom of the filter cylinder body 1 is communicated with a purified water tank 26 through a water outlet pipe 21, the purified water tank 26 is communicated with the bottom of the filter cylinder body 1 through a backwashing water inlet pipe 19, the water outlet pipe is provided with an electric ball valve III 22 and a lower pressure gauge 23, the backwashing water inlet pipe 19 is provided with a backwashing pump 17, a Y-shaped filter valve II 15 and an electric ball valve II 18, the water inlet of the security filter 28 is communicated with the annular overflow trough 6 through a backwashing water outlet pipe 30, the backwashing water outlet pipe 30 is provided with an electric ball valve IV 29, the water outlet of the security filter 28 is communicated with the purified water tank 26 through a pipeline, a second water drain valve 27 is arranged on the pipeline, and the second water drain valve 27 is in a long-open state; an upper pressure gauge 4 is arranged at the upper end of the filter cylinder body 1, a pressure comparator 31 is connected between the upper pressure gauge 4 and the lower pressure gauge 23, the pressure comparator 31 is connected with a controller (not shown), and the controller controls the opening and closing of each pump and each electric ball valve.
The water inlet close to the upper part of the filter cylinder body 1 in the filter cylinder body 1 is provided with a water baffle 5 right opposite to the water inlet, the water inlet is provided with a welded water pipe, the water baffle is welded with one end of the water pipe, the other end of the water pipe is communicated with the water inlet pipe, a large water outlet is formed in the wall of the water pipe, when the water baffle 5 is used for water inlet, water flows out of the water outlet, and the impact of water inlet pressure on a filter material is slowed down by the baffle.
The water inlet pipe 7 is provided with a first manual valve 12, the water outlet pipe 21 is provided with a second manual valve 16, and the two manual valves are generally in a long-open state.
The bottom of the filter cylinder body 1 is provided with a sewage discharge pipeline and a water discharge pipeline, the sewage discharge pipeline is provided with a sewage discharge valve 34, the sewage discharge valve 34 is in a normally closed state and can be opened only when sewage is required to be discharged, the water discharge pipeline is provided with a first water discharge valve 25, the first water discharge valve 25 is in a normally closed state, and the first water discharge valve 25 is used for timely discharging water in the filter when the equipment stops running. A ceramic filter element is arranged in the middle of the filter material, a ceramic filter element 24 is arranged at the position, right opposite to the water drain pipeline, of the lower area of the filter cylinder body 1, and the filtering precision of the ceramic filter element 24 reaches 5 micrometers; the ceramic filter element has three functions: firstly, the middle of the upper layer of filter material is installed to play a role in stabilizing the filter material; the second is used as a water outlet for detecting the filtered water quality; and thirdly, if the filtering pipeline or the exhaust valve is blocked, the exhaust can be performed.
The annular overflow groove 6 is arranged above the AFM filter material 33, and the outer wall of the annular overflow groove 6 is welded on the inner wall of the filter cylinder 1. And the annular overflow groove is used for receiving solid suspended particles which are back-washed out of the filter cap 9 and the AFM filter material 33 during back washing.
The Y-shaped filter valve I13 is close to the water outlet of the filtered water tank 14 and can primarily filter water to be filtered, and the Y-shaped filter valve II 15 is close to the water outlet of the purified water tank 26 and can filter water entering the purified water tank 26 again.
The bracket 20 is arranged at the bottom of the outer part of the filter cylinder 1, so that the mounting machine of the filter cylinder 1 is stable.
The upper end of the filter cylinder body 1 is provided with a manhole 3, the side wall of the filter cylinder body 1 is provided with a side manhole 32, and the filter cylinder body 1 is provided with a sight glass 8. The manhole 3 and the side manhole 32 are used for maintenance, and the sight glass 8 is used for observing the operation condition of the equipment.
As shown in fig. 2 to 4, a filtering method of a filter, which uses the above filter, specifically includes the following steps:
firstly, a water inlet process:
the controller controls the second electric ball valve 18 and the fourth electric ball valve 29 to be closed, the third electric ball valve 22 and the first electric ball valve 10 to be opened, the first manual valve 12 is in a normally open state, the water inlet pump 11 is started, water to be filtered in the filtered water tank 14 sequentially passes through the first Y-shaped filter valve 13, the first manual valve 12, the water inlet pump 11 and the first electric ball valve 10 via the water inlet pipe 7 to enter the filter cylinder 1, and the water to be filtered in a high-pressure state is collided with the water baffle 5 and then is sprayed to the AFM filter material 33 to start filtering;
II, filtering:
water to be filtered entering the filter cylinder 1 is filtered by the AFM filter material 33, then enters the lower area of the filter cylinder 1 through the plurality of filter caps 9, and then flows into the water purification tank 26 through the water outlet pipe 21 and the electric ball valve III 22, so that the filtering of the water with the filter is realized;
thirdly, backwashing:
the manual valve II 16 is in a normally open state, when a logical ratio of the upper pressure gauge 4 to the lower pressure gauge 23 is carried out by the pressure comparator 31, if a set value is reached, the controller controls the backwashing process to start, the backwashing pump 17 is started, the electric ball valve II 18 and the electric ball valve IV 29 are started, the water inlet pump 11, the electric ball valve III 22 and the electric ball valve I10 are closed, backwashing water enters the filter cylinder body 1 through the Y-shaped filter valve II 15, the manual valve II 16, the electric ball valve II 18 and the backwashing water pipe 19, the filter cap 9 and the AFM filter material 33 are backwashed, solid suspended particles are flushed into the annular overflow tank 6 by the backwashing water, the annular overflow tank 6 is communicated with the backwashing water outlet pipe 30, the solid suspended particles are injected into the security filter 28 along the backwashing water outlet pipe 30 and the electric ball valve IV 29, the solid filtered by the security filter 28 is retained in the filter screen, and clean water returns to the water tank 26 through the second water discharge valve 27 and the pipeline, and realizing backwashing.
The embodiments of the invention disclosed above are intended merely to aid in the explanation of the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention.
Claims (10)
1. A filter, characterized by: the AFM filter comprises a filter cylinder body (1), a filtered water tank (14), a water purifying water tank (26) and a security filter (28), wherein the filter cylinder body (1) is divided into an upper area and a lower area by arranging a partition plate at the middle lower part in the filter cylinder body (1), a plurality of filter caps (9) are uniformly distributed on the partition plate, AFM filter materials (33) are laid in the upper area, an annular overflow groove (6) is arranged at the upper part of the inner wall of the filter cylinder body (1), a water inlet at the upper part of the filter cylinder body (1) is communicated with the filtered water tank (14) through a water inlet pipe (7), a water inlet pump (11), a Y-shaped filter valve I (13) and an electric ball valve I (10) are arranged on the water inlet pipe (7), a water outlet at the bottom of the filter cylinder body (1) is communicated with the water purifying water tank (26) through a water outlet pipe (21), and the water purifying water tank (26) is communicated with the bottom of the filter cylinder body (1) through a back flush water inlet pipe (19), be equipped with electronic ball valve three (22) and holding down pressure gauge (23) on outlet pipe, be equipped with back flush pump (17), Y type filter valve two (15) and electronic ball valve two (18) on back flush inlet tube (19), the water inlet of security filter (28) communicate with annular overflow launder (6) through back flush outlet pipe (30), be equipped with electronic ball valve four (29) on back flush outlet pipe (30), the delivery port of security filter (28) passes through pipeline and clean water basin (26) intercommunication, be equipped with in filter barrel (1) upper end and go up manometer (4), it is connected with pressure comparator (31) to go up between manometer (4) and the lower manometer (23), pressure comparator (31) be connected with the controller, the controller control each pump and each electronic ball valve open and close.
2. A filter according to claim 1, wherein: a water baffle (5) is arranged in the filter cylinder body (1) close to the water inlet on the upper part of the filter cylinder body (1) and right opposite to the water inlet.
3. A filter according to claim 1, wherein: a first manual valve (12) is arranged on the water inlet pipe (7), and a second manual valve (16) is arranged on the water outlet pipe (21).
4. A filter according to claim 1, wherein: the filter comprises a filter cylinder body (1), and is characterized in that a sewage discharge pipeline and a water discharge pipeline are arranged at the bottom of the filter cylinder body (1), a sewage discharge valve (34) is arranged on the sewage discharge pipeline, a first water discharge valve (25) is arranged on the water discharge pipeline, and a ceramic filter element (24) is arranged in the lower area of the filter cylinder body (1) and is just opposite to the water discharge pipeline.
5. A filter according to claim 1, wherein: and a second water drain valve (27) is arranged on the pipeline.
6. A filter according to claim 1, wherein: the annular overflow groove (6) is arranged above the AFM filter material (33), and the outer wall of the annular overflow groove (6) is welded on the inner wall of the filter cylinder body (1).
7. A filter according to claim 1, wherein: the Y-shaped filter valve I (13) is arranged close to a water outlet of the filtered water tank (14), and the Y-shaped filter valve II (15) is arranged close to a water outlet of the purified water tank (26).
8. A filter according to claim 1, wherein: the bottom of the outer part of the filter cylinder body (1) is provided with a bracket (20).
9. A filter according to claim 1, wherein: the manhole (3) is arranged at the upper end of the filter cylinder body (1), the side manhole (32) is arranged on the side wall of the filter cylinder body (1), and the sight glass (8) is arranged on the filter cylinder body (1).
10. A method of filtering a filter using a filter according to any one of claims 1 to 9, wherein: the method specifically comprises the following steps:
firstly, a water inlet process:
the controller controls the second electric ball valve (18) and the fourth electric ball valve (29) to be closed, the third electric ball valve (22) and the first electric ball valve (10) to be opened, the first manual valve (12) is in a normally open state, the water inlet pump (11) is started, water to be filtered in the filtering water tank (14) sequentially passes through the first Y-shaped filtering valve (13), the first manual valve (12), the water inlet pump (11) and the first electric ball valve (10) through the water inlet pipe (7) and enters the filter cylinder body (1), and the water to be filtered is collided with the water baffle (5) and then is sprayed to the AFM filter material (33) to start filtering;
II, filtering:
water to be filtered entering the filter cylinder body (1) is filtered by the AFM filter material (33), then enters the lower area of the filter cylinder body (1) through the plurality of filter caps (9), and then flows into the water purification tank (26) through the water outlet pipe (21) and the electric ball valve III (22), so that the filtering of the water with the filter is realized;
thirdly, backwashing:
the manual valve II (16) is in a normally open state, when a pressure comparator (31) carries out logic ratio on the upper pressure gauge (4) and the lower pressure gauge (23), if a set value is reached, the controller controls the back washing process to start, the back washing pump (17) is started, the electric ball valve II (18) and the electric ball valve IV (29) are started, the water inlet pump (11), the electric ball valve III (22) and the electric ball valve I (10) are closed, back washing water enters the filter cylinder body (1) through the Y-shaped filter valve II (15), the manual valve II (16), the electric ball valve II (18) and the back washing water pipe (19), the filter cap (9) and the AFM filter material (33) are back washed, solid suspended particles are washed into the annular overflow trough (6) by the back washing water, the annular overflow trough (6) is communicated with the back washing water outlet pipe (30), the solid suspended particles are injected into the safety protection filter (28) along the back washing water outlet pipe (30) and the electric ball valve IV (29), the solid filtered by the security filter (28) is retained in the filter screen, and the clean water returns to the clean water tank (26) through the second water drain valve (27) and the pipeline to realize back flushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210117071.4A CN114588670A (en) | 2022-02-07 | 2022-02-07 | Filter and filtering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210117071.4A CN114588670A (en) | 2022-02-07 | 2022-02-07 | Filter and filtering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114588670A true CN114588670A (en) | 2022-06-07 |
Family
ID=81806203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210117071.4A Pending CN114588670A (en) | 2022-02-07 | 2022-02-07 | Filter and filtering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114588670A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196773A (en) * | 2022-07-29 | 2022-10-18 | 苏州碧青环境科技有限公司 | Surface water pretreatment device and process |
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|---|---|---|---|---|
| US5112504A (en) * | 1991-05-22 | 1992-05-12 | Baker Hughes Incorporated | System and method of decreasing waste fluid in continuous backwash filtration |
| CN200990814Y (en) * | 2006-12-27 | 2007-12-19 | 王松涛 | Back-washing water-supplying apparatus |
| CN102626564A (en) * | 2011-11-09 | 2012-08-08 | 高全财 | Novel multimedium filter for water treatment |
| CN209752264U (en) * | 2019-01-25 | 2019-12-10 | 山东环科环保科技有限公司 | Deep bed filter |
| CN111228866A (en) * | 2018-11-28 | 2020-06-05 | 北京奥博水处理有限责任公司 | Online self-cleaning medium filtering device |
| CN111871020A (en) * | 2020-07-29 | 2020-11-03 | 中钢集团马鞍山矿山研究总院股份有限公司 | Wastewater purification system adopting multi-medium filtration |
| CN214457302U (en) * | 2020-12-22 | 2021-10-22 | 陕西太阳景环保科技有限公司 | Oily sewage treatment equipment |
| CN113683240A (en) * | 2021-09-22 | 2021-11-23 | 华东理工大学 | Method and device for treating hospital sewage by physical and chemical method |
-
2022
- 2022-02-07 CN CN202210117071.4A patent/CN114588670A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112504A (en) * | 1991-05-22 | 1992-05-12 | Baker Hughes Incorporated | System and method of decreasing waste fluid in continuous backwash filtration |
| CN200990814Y (en) * | 2006-12-27 | 2007-12-19 | 王松涛 | Back-washing water-supplying apparatus |
| CN102626564A (en) * | 2011-11-09 | 2012-08-08 | 高全财 | Novel multimedium filter for water treatment |
| CN111228866A (en) * | 2018-11-28 | 2020-06-05 | 北京奥博水处理有限责任公司 | Online self-cleaning medium filtering device |
| CN209752264U (en) * | 2019-01-25 | 2019-12-10 | 山东环科环保科技有限公司 | Deep bed filter |
| CN111871020A (en) * | 2020-07-29 | 2020-11-03 | 中钢集团马鞍山矿山研究总院股份有限公司 | Wastewater purification system adopting multi-medium filtration |
| CN214457302U (en) * | 2020-12-22 | 2021-10-22 | 陕西太阳景环保科技有限公司 | Oily sewage treatment equipment |
| CN113683240A (en) * | 2021-09-22 | 2021-11-23 | 华东理工大学 | Method and device for treating hospital sewage by physical and chemical method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196773A (en) * | 2022-07-29 | 2022-10-18 | 苏州碧青环境科技有限公司 | Surface water pretreatment device and process |
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