CN110130469A - A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus - Google Patents
A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus Download PDFInfo
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- CN110130469A CN110130469A CN201910276481.1A CN201910276481A CN110130469A CN 110130469 A CN110130469 A CN 110130469A CN 201910276481 A CN201910276481 A CN 201910276481A CN 110130469 A CN110130469 A CN 110130469A
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- permeable
- integrated apparatus
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/102—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins using already existing parts of the sewer system for runoff-regulation
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention discloses a kind of environment-friendly multi-stages to filter inlet for stom water integrated apparatus, belong to rainwater purification technical field, including the water-carrying groove containing discharge outlet, the water-carrying groove bottom has certain slope, device top is loaded with rain perforaled strainer, it can pull-type cover board, being loaded under the rain perforaled strainer can overflow type sewage intercepting Hanging Basket, multistage filter is housed inside device, the multistage filter main body is made of six pieces of different porous permeable nets, the porous permeable net constitutes grade one filter per adjacent two pieces by left-to-right, three-level altogether, permeable hole aperture is identical on every grade of permeable net and reduces step by step, equipped with partial size by the left-to-right variety classes filtrate to successively decrease step by step between every grade of permeable net.The present invention can carry out filtration treatment step by step to the higher initial rainwater of pollution level, it can be from the overflow of multistage filter top to more clean later period rainwater, municipal Storm Sewer Network finally is imported through discharge outlet, the purification to initial rainwater is realized, avoids the pollution to receiving water body.
Description
Technical field
The present invention relates to a kind of inlets for stom water, filter inlet for stom water integrated apparatus more particularly, to a kind of environment-friendly multi-stage.
Background technique
Initial rainwater is the main reason for causing pollution of area source.In initial rainwater containing a large amount of organic matter, suspended solid,
The polluters such as heavy metal, grease and pathogen, pollution level is high, usually more than the pollution level of municipal wastewater, and most of
Pollutant index exceeds surface water environment quality V class standard limit value, will if it is exhausted directly in receiving water body without processing
Serious pollution can be caused to receiving water body.
Inlet for stom water is the source of urban rainwater drainage system, be generally arranged at square gathering ground, crossing and street drainage ditch,
The regions such as street gutter are prevented road or low laying areas ponding by the quick outlet of rainwater, avoid traffic obstruction or road
The problems such as path loss is ruined.Existing inlet for stom water usually only has a fast row function of rainwater, but exist the function of not having rainwater purification or
The problem of detergent power deficiency.Rainfall washes away a large amount of pollutants of road surface into inlet for stom water, if inlet for stom water can not be to pollution
Object is effectively intercepted, it will is caused pipe network to block, is led to surface gathered water or pollution receiving water body.
Installation initial rainwater discharge facility is generallyd use at present and carries out initial rainwater processing, and initial rainwater is diverted to sewage treatment
Factory or storage pond.This undoubtedly increases construction and processing cost, while increasing the operating pressure of sewage treatment plant.
Summary of the invention
The technical problems to be solved by the invention, being just to provide one kind without installing initial rainwater discharge equipment can be realized initial stage
Rainwater purification, and anti-clogging, simple installation, environment-friendly multi-stage filtering inlet for stom water integrated apparatus also at low cost easy to maintain.
Above-mentioned technical problem is solved, the technology used in the present invention solution is as follows:
A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus, including the water-carrying groove containing discharge outlet, it is characterized in that: described
Water-carrying groove on be covered with rain perforaled strainer, rain perforaled strainer have can overflow type sewage intercepting Hanging Basket, set before water-carrying groove internal drainage mouth
There is at least tertiary filter；Described every grade of filter is made of two pieces of porous permeable nets, permeable on every grade of two pieces of permeable nets
Hole aperture is identical, and the permeable hole aperture on tertiary filter permeable net reduces step by step from farthest away near discharge outlet, three-level
Variety classes filtrate is housed between two pieces of permeable nets and partial size reduces step by step, liquid level regulatory region is provided between tertiary filter.
Open at one end in the water-carrying groove is equipped with dismountable cover plate, is covered in the rain perforaled strainer on Prefabricated combined septic tank and exists
The other end, discharge outlet are located at the opposite other end (being covered under one end of rain perforaled strainer) for being covered with rain perforaled strainer.
It is described can the lower part of overflow type sewage intercepting Hanging Basket be that sieve, top are provided with overflow port.
It is described can the sieve mesh of overflow type sewage intercepting Hanging Basket be square or round, overflow port is rectangle.
The water-carrying groove be rectangular parallelepiped structure, the bottom angled gradient be 5%, discharge outlet be located at extreme lower position and with municipal rain
Waterpipe is connected.
The porous permeable net is plate, and two vertical edges and bottom edge are embedded in the groove of described water-carrying groove the right and left and bottom
Interior fixation, near the permeable net and 30~50cm of discharge outlet spacing of discharge outlet.
The high 0.5m of porous permeable net, the thick 2mm, two pieces of permeable net 10~15cm of spacing of peer, first order permeable hole hole
Diameter is 2cm, and second level permeable hole aperture is 1cm, and third level permeable hole aperture is 0.5cm.
There are liquid level differences between every grade of filter, it is ensured that the smooth draining of multistage filter, adjusting sector width 5~
10cm。
The water-carrying groove material is precast concrete or glass reinforced plastic, 1.5~2m of length, 0.47~0.5m of width, height 1m；
The discharge outlet diameter 0.2m.
The rain perforaled strainer is cuboid, and material is cast iron, resin or stainless steel.
The Prefabricated combined septic tank is below rain perforaled strainer, and material is stainless steel, and height 0.2m, sieve mesh is square (round
Shape), side length (diameter) 0.5cm has rectangle overflow port, long 0.1m, wide 0.03m in the surrounding side wall of top.
It is described can pull-type cover board be cast iron quality, top have lift-pull handle.
The filtrate at different levels is respectively zeolite, haydite, quartz sand or other a variety of qualified types, every level-one filtrate
Partial size is greater than porous permeable screen distance, with filtrate mesh bag splendid attire.
A large amount of pollutants are carried by rain perforaled strainer and are cut the invention has the benefit that city rainfall runoff washes away road surface
When dirty Hanging Basket, primary section of dirty processing is carried out, the bulks pollutant such as leaf, polybag can be separated with rainwater, initial rainwater runoff
Very little is measured, therefore primary filtered initial rainwater will be by multistage filter, by the descending different gradation of partial size and not
After filtering with type filtrate, initial rainwater is fully purified, when Rainfall runoff is gradually increased, cleaner middle and later periods rain
Water will pass through above multistage filter, and the Storm Sewer Network connected through discharge outlet can be directly discharged into receiving water body, avoid pair
The pollution of receiving water body, and the expense of installation initial rain flow removing device, sewage network can be saved, reduce the operation of sewage treatment plant
Burden and cost.And the present apparatus assembles, disassembly is all more convenient, small volume occupied area is little, filtrate can periodically be taken out clearly
It washes, is recycled, cost is relatively low, maintenance is relatively simple.
Environment-friendly multi-stage filtering inlet for stom water integrated apparatus of the invention not only has the function that rainwater is arranged fastly, can also have both
The functions such as anti-clogging, the purification of first rain.
Detailed description of the invention
Fig. 1 is the overall structure diagrammatic cross-section of the embodiment of the present invention；
Fig. 2 a is the Prefabricated combined septic tank flat structure diagrammatic cross-section of the embodiment of the present invention (along the line A-A of Fig. 2 b)；
Fig. 2 b is the Prefabricated combined septic tank flat structure schematic top plan view of the embodiment of the present invention；
Fig. 2 c is the Prefabricated combined septic tank flat structure diagrammatic cross-section of the embodiment of the present invention (along the I-I line of Fig. 2 b)；
Fig. 3 a is the structure schematic top plan view of the embodiment of the present invention；
Fig. 3 b be the embodiment of the present invention remove rain perforaled strainer, can pull-type cover board and can overflow type sewage intercepting Hanging Basket upper layer knot
Structure schematic top plan view；
Fig. 3 c be the embodiment of the present invention remove rain perforaled strainer, can pull-type cover board and can overflow type sewage intercepting Hanging Basket lower layer knot
Structure schematic top plan view；
Fig. 4 a is the structure schematic side view of the embodiment of the present invention；
Fig. 4 b is the 1-1 line schematic cross-sectional view along Fig. 3 a；
Fig. 4 c is the 2-2 line schematic cross-sectional view along Fig. 3 a；
Fig. 4 d is the line A-A schematic cross-sectional view along Fig. 3 a；
Fig. 4 e is the big logotype of three-level porous permeable net mesh；
Fig. 5 is the rain perforaled strainer structure schematic top plan view of the embodiment of the present invention；
Fig. 6 a can pull-type cover board front view for the embodiment of the present invention；
Fig. 6 b can pull-type cover board top view for the embodiment of the present invention.
Appended drawing reference: 1- rain perforaled strainer, 2- Prefabricated combined septic tank, 21- gap, 22- stainless steel mesh, 3- water-carrying groove, 4-
Level-one porous permeable net, the second level 5- porous permeable net, 6- third level porous permeable net, 7- liquid level regulatory region, 8- can pull-type
Cover board, 9- discharge outlet, 10- first order filtrate, the second level 11- filtrate, 12- third level filtrate.
Specific embodiment
Son and Figure of description make clear, detailed description to the present invention combined with specific embodiments below.
Referring to Fig. 1 to Fig. 6 b, inlet for stom water integrated apparatus embodiment is filtered for environment-friendly multi-stage of the invention.It includes containing
The water-carrying groove 3 of discharge outlet 9.Be covered with rain perforaled strainer 1 in water-carrying groove 3, rain perforaled strainer have can overflow type sewage intercepting Hanging Basket 2, mistake
Tertiary filter is equipped with before sink internal drainage mouth.
Described every grade of filter is made of two pieces of identical porous permeable nets, the permeable hole hole on every grade of two pieces of permeable nets
Diameter is identical, and the permeable hole aperture on the first order, the second level and third level filter permeable net 4,5,6 is from farthest away near row
The mouth of a river 9 reduces step by step, and variety classes filtrate: first order filtrate 10,11 and of second level filtrate is housed between two pieces of permeable nets of three-level
Third level filtrate 12, and partial size reduces step by step, and liquid level regulatory region 7 is provided between tertiary filter.The filtrate is at different levels to be respectively
Zeolite, haydite, quartz sand or other a variety of qualified types, every level-one particle diameter of filter medium are greater than porous permeable screen distance,
With filtrate mesh bag splendid attire.
The water-carrying groove 3 be rectangular parallelepiped structure, the bottom angled gradient be 5%, discharge outlet be located at extreme lower position and with municipal administration
Storm sewer is connected, and the open at one end in water-carrying groove is equipped with dismountable cover plate 8, the rain perforaled strainer being covered on Prefabricated combined septic tank
In the other end, discharge outlet is located at the opposite other end (being covered under one end of rain perforaled strainer) for being covered with rain perforaled strainer.Water-carrying groove
Material is precast concrete or glass reinforced plastic, 1.5~2m of length, 0.47~0.5m of width, height 1m；The discharge outlet diameter
0.2m。
Can the lower part of overflow type sewage intercepting Hanging Basket 2 be that sieve, top are provided with overflow port, sieve mesh is square or round,
Overflow port is rectangle.Prefabricated combined septic tank is below rain perforaled strainer, and material is stainless steel, height 0.2m, and sieve mesh is square
(circle), side length (diameter) 0.5cm have rectangle overflow port, long 0.1m, wide 0.03m in the surrounding side wall of top.
The porous permeable net is plate, and two vertical edges and bottom edge are embedded in the groove of described water-carrying groove the right and left and bottom
Interior fixation, near the permeable net and 30~50cm of discharge outlet spacing of discharge outlet；Porous permeable net high 0.5m, thick 2mm, peer two
Block permeable net 10~15cm of spacing, first order permeable hole aperture are 2cm, and second level permeable hole aperture is 1cm, third level permeable hole
Aperture is 0.5cm.
There are liquid level differences between every grade of filter, it is ensured that the smooth draining of multistage filter, adjusting sector width 5~
10cm。
The rain perforaled strainer is cuboid, and material is cast iron, resin or stainless steel；It is described can pull-type cover board be cast iron material
Matter, top have lift-pull handle.
In specific implementation, city rainfall runoff carries out once cutting dirty processing by rain perforaled strainer 1 and Prefabricated combined septic tank 2, dirty
The higher initial rainwater of dye degree using multistage filter carry out secondary filter processing, and more clean later period rainwater then from
The overflow of multistage filter top is gone over, and the municipal Storm Sewer Network that can be finally connected from device discharge outlet 9 is discharged into receiving water body,
The purification to initial rainwater is realized, the pollution to receiving water body is avoided.
Rain perforaled strainer 1 and Prefabricated combined septic tank 2 can filter the large volumes pollutants such as leaf, polybag in city rainfall runoff
Fall, avoid the blocking to device internal multi-stage filter and discharge outlet 9, Prefabricated combined septic tank 2 is taken in 1 lower part of rain perforaled strainer, the two
It is loaded in water-carrying groove 3.
Such as Fig. 2 a to Fig. 2 c, 2 top of Prefabricated combined septic tank has gap 21, and lower part is stainless steel metal sieve 22.?
In specific implementation, if rainwater can be overflowed from top gap 21 when the pollutant that rainfall runoff carries blocks sieve mesh,
Draining is set to keep clear.
Such as Fig. 1 and Fig. 4 a to Fig. 4 c, the tertiary filter, by six pieces of porous permeable nets 4,5,6, composition, structure is more
Simply.Six pieces of porous permeable nets 4,5,6 are 1 grade per adjacent two pieces by left-to-right, and totally 3 grades, at different levels are divided into liquid level regulatory region 7,
Consistent with 4,5,6 pore size of level-one porous permeable net, from left to right every grade of aperture is gradually reduced.Porous permeable net 4,5,6 is embedding
It is fixed in 3 the right and left of water-carrying groove and bottom interior wall.It is different that particle size is respectively provided between porous permeable nets 4,5,6 at different levels
Filtrate zeolite, haydite, quartz sand 10,11,12 or other a variety of qualified types.
In specific implementation, rainfall runoff, will be larger after the primary filtering of rain perforaled strainer 1 and Prefabricated combined septic tank 2
Pollutant filter out, the higher initial rainwater of the pollution level flow down can from the porous permeable net 4 of multistage filter, 5,
It is flowed into 6 hole, because 3 bottom of water-carrying groove has certain slope, there are liquid level difference, rainwater streams again for liquid level regulatory regions 7 at different levels
Cross more smooth, initial rainwater passes through at different levels filtrates 10,11,12, filters step by step, most of SS, COD, TP, TN, a huge sum of money
The pollutants such as category are adsorbed by filtrate 10,11,12, and initial rainwater is made to have obtained sufficient purification, when middle and later periods amount of rainfall increases
When, more clean middle and later periods rainwater will not pass through porous permeable net 4,5,6, but directly from overflow at the top of multistage filter
It goes, is discharged from discharge outlet 9.
The preferred embodiment of the present invention are as follows: water-carrying groove 3 is rectangular parallelepiped structure, and material is precast concrete or glass reinforced plastic, length
Spend 1.5~2m, 0.47~0.5m of width, height 1m.The discharge outlet 9 is in 3 bottom of water-carrying groove, diameter 0.2m.
The preferred embodiment of the present invention are as follows: 2 material of Prefabricated combined septic tank is stainless steel, and height 0.2m, sieve mesh is square,
Side length 0.5cm has rectangle gap 21, long 0.1m, wide 0.03m in the surrounding side wall of top.
The preferred embodiment of the present invention are as follows: the porous permeable net 4,5,6 of multistage filter is rectangular-shape structure, height
0.5m, thickness 2mm are fixed embedded in 3 the right and left of water-carrying groove and bottom interior wall, are level-one by left-to-right every two pieces, altogether three-level, together
Two pieces of level-one permeable net spacing 10~15cm, at different levels 5~10cm of spacing, permeable hole is rectangular on permeable net, and is reduced step by step,
First order permeable hole aperture is 2cm, and second level permeable hole aperture is 1cm, and third level permeable hole aperture is 0.5cm.
The preferred embodiment of the present invention are as follows: device top be equipped with can pull-type cover board 8, handle can be had on pull-type cover board 8
Hand overhauls internal multistage filter convenient for opening, is cleared up, is safeguarded.
The preferred embodiment of the present invention are as follows: filtrate 10,11,12 can be zeolite, haydite, quartz sand, be contained by filtrate mesh bag,
When filtrate 10,11,12 adsorb pollutant reach saturation or block when, maintenance personnel it is openable can pull-type cover board 8, will filter
Expect that mesh bag takes out, after being rinsed with water completely, recycling, easy to maintain, save the cost can be put back to.
Claims (10)
1. a kind of environment-friendly multi-stage filters inlet for stom water integrated apparatus, the water-carrying groove (3) including containing discharge outlet (9), it is characterized in that:
Be covered in the water-carrying groove rain perforaled strainer (1), rain perforaled strainer have can overflow type sewage intercepting Hanging Basket (2), row in water-carrying groove
At least tertiary filter is equipped with before the mouth of a river；Described every grade of filter is made of two pieces of porous permeable nets, and two pieces every grade permeable
Online permeable hole aperture is identical, and the permeable hole aperture on tertiary filter permeable net (4,5,6) is from farthest away near row
The mouth of a river reduces step by step, and variety classes filtrate is housed between two pieces of permeable nets of three-level and partial size reduces step by step, is set between tertiary filter
It is equipped with liquid level regulatory region (7).
2. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the water-carrying groove
(3) one end on is equipped with dismountable cover plate (8), the rain perforaled strainer (1) being covered on Prefabricated combined septic tank (2) in the other end, row
The mouth of a river (9) is located at the opposite other end for being covered with rain perforaled strainer.
3. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described overflows
The lower part of streaming Prefabricated combined septic tank is sieve, top is provided with overflow port.
4. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the water-carrying groove
It (3) is rectangular parallelepiped structure, the bottom angled gradient is 5%, and discharge outlet is located at extreme lower position and is connected with municipal storm sewer.
5. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described is porous
Permeable net is that plate, two vertical edges and bottom edge are fixed in the groove of described water-carrying groove the right and left and bottom, near draining
The permeable net and 30~50cm of discharge outlet spacing of mouth.
6. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described porous
The high 0.5m in the network of rivers, thick 2mm, two pieces of permeable net 10~15cm of spacing of peer, first order permeable hole aperture are 2cm, and the second level is permeable
Hole aperture is 1cm, and third level permeable hole aperture is 0.5cm.
7. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: every grade of filter
Between there are liquid level difference, adjust 5~10cm of sector width.
8. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described section of dirty extension
Basket is below rain perforaled strainer, and material is stainless steel, and height 0.2m, sieve mesh is square or round, side length or diameter
0.5cm has rectangle overflow port, long 0.1m, wide 0.03m in the surrounding side wall of top.
9. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: the filtrate is each
Grade is respectively zeolite, haydite, quartz sand or other qualified types, and every level-one particle diameter of filter medium is greater than porous permeable mesh
Diameter, with filtrate mesh bag splendid attire.
10. environment-friendly multi-stage according to claim 1 filters inlet for stom water integrated apparatus, it is characterised in that: described to mention
Pull-type cover board is cast iron quality, and top has lift-pull handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276481.1A CN110130469A (en) | 2019-04-08 | 2019-04-08 | A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276481.1A CN110130469A (en) | 2019-04-08 | 2019-04-08 | A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus |
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| CN110130469A true CN110130469A (en) | 2019-08-16 |
Family
ID=67569539
Family Applications (1)
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|---|---|---|---|
| CN201910276481.1A Pending CN110130469A (en) | 2019-04-08 | 2019-04-08 | A kind of environment-friendly multi-stage filtering inlet for stom water integrated apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188399A (en) * | 2020-01-20 | 2020-05-22 | 华侨大学 | Water-blocking drainage system |
| CN111305348A (en) * | 2020-03-05 | 2020-06-19 | 重庆文理学院 | Non-excavation formula biological detention system |
| CN111364589A (en) * | 2020-04-30 | 2020-07-03 | 上海城市水资源开发利用国家工程中心有限公司 | Drainage pipeline inspection well with porous plate |
| CN111549896A (en) * | 2020-06-10 | 2020-08-18 | 上海妙佳流体控制技术有限公司 | Oil-intercepting and dirt-intercepting device for rainwater pumping station |
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| CN202054704U (en) * | 2011-04-08 | 2011-11-30 | 重庆大学 | Multistage slope bank sand setting and infiltration combined system for treating agricultural runoff pollution |
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| CN205965270U (en) * | 2016-08-21 | 2017-02-22 | 中国石油化工股份有限公司 | Operation circulation contaminated water filtration apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188399A (en) * | 2020-01-20 | 2020-05-22 | 华侨大学 | Water-blocking drainage system |
| CN111188399B (en) * | 2020-01-20 | 2024-04-30 | 华侨大学 | Water-blocking drainage system |
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| CN111549896A (en) * | 2020-06-10 | 2020-08-18 | 上海妙佳流体控制技术有限公司 | Oil-intercepting and dirt-intercepting device for rainwater pumping station |
| CN111549896B (en) * | 2020-06-10 | 2024-04-26 | 上海妙佳流体控制技术有限公司 | Oil-intercepting and dirt-intercepting device of rainwater pump station |
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Application publication date: 20190816 |