CN105013244A - Multistage rainwater purification treatment device - Google Patents

Multistage rainwater purification treatment device Download PDF

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Publication number
CN105013244A
CN105013244A CN201510459527.5A CN201510459527A CN105013244A CN 105013244 A CN105013244 A CN 105013244A CN 201510459527 A CN201510459527 A CN 201510459527A CN 105013244 A CN105013244 A CN 105013244A
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China
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rainwater
purification treatment
water
filtering
rainwater purification
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CN201510459527.5A
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CN105013244B (en
Inventor
马佳
汤杰
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WUHAN MEIHUA YUSHUI ENVIRONMENT CO., LTD.
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Wuhan Shengyu Drainage Systems Co Ltd
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Abstract

The invention discloses a multistage rainwater purification treatment device which comprises a plurality of stages of treatment pools; the plurality of stages of treatment pools comprises a pre-settling pool, a filtering pool and a water discharging pool from forth to back; a water inlet pipe is arranged in the pre-settling pool; a baffle structure is arranged between the pre-settling pool and the filtering pool; an overflowing baffle is arranged between the filtering pool and the water discharging pool; a plurality of rainwater filters are arranged in the filtering pool; the water discharging openings of the rainwater filters are communicated with the water discharging pool; a water outlet pipe is connected in the water discharging pool. According to the multistage rainwater purification treatment device, functions of gravity settling, screening, filtering and overflowing are integrated, sediments in rainwater are removed by the pre-settling pool, the baffle structure blocks floating matters in the rainwater and can perform primary purification on the rainwater, and the further filtering treatment is performed on the rainwater by the rainwater filters in the filtering pool, so that pollutants, such as particulate matters, heavy metal and organic matters, in the rainwater are removed effectively, the purification treatment efficiency and the pollutant removal efficiency are improved, the standard discharging or recycling of the rainwater is realized, the water environment is protected, and the difficult problem of water shortage is solved.

Description

Multistage rainwater purification treatment facility
Technical field
The present invention relates to rainwater purification equipment, refer to a kind of multistage rainwater purification treatment facility particularly.
Background technology
Urbanization process and industrialization development cause water source judgment and the harm of rain flood day by day seriously, and clean water source is fewer and feweri, and now, nearly all country all exists lack of water phenomenon in the world, and China's water shortage problem is more serious, especially in the northern area of China.Therefore, people need to develop a kind of new water resource, using rainwater in addition Collection utilization carry out as water resource the emerging problem that the comprehensive regulation just becomes important.And due to the develop rapidly of economy, the quickening of Development of China's Urbanization, a large amount of uses of earth's surface impermeable material, make runoff pollution more and more serious, especially the early-stage rainwater that pollutant is more, the pollutant index peak of the early-stage rainwater of certain areas is far away higher than typical urban sanitary sewage.
At present, the collection process of China to early-stage rainwater is scarcely out of swaddling-clothes, collecting early-stage rainwater is only do not allow it enter water pollution water quality, the purified treatment of early-stage rainwater and reuse are then seldom considered, even if some area attempts carrying out purified treatment to early-stage rainwater, the existing rainwater treatment facility of most area does not reach rainwater treatment demand far away yet.Therefore, most early-stage rainwater directly enters municipal sanitary sewage pipe network, and the pollutant levels contained in rainwater are higher, especially road early-stage rainwater, directly enter sanitary sewage pipe network and can bring larger load to Sewage Plant; Also some area is then direct by early-stage rainwater stream abandoning, and maybe the rainwater exceeding rainwater treatment facility disposal ability is directly entered natural water, this all can cause water pollution, does not also carry out Appropriate application to rainwater, causes water resource waste.
Summary of the invention
Object of the present invention will provide a kind of multistage rainwater purification treatment facility exactly, and this equipment significantly can reduce the pollutant load in rainwater, realizes rainwater qualified discharge or reuse.
For achieving the above object, the technical solution used in the present invention is: a kind of multistage rainwater purification treatment facility, comprise multistep treatment pond, described multistep treatment pond comprises pre-settling tank from front to back successively, filtering ponds and blowoff basin, be connected with water inlet pipe in described pre-settling tank, be provided with baffle arrangement between described pre-settling tank and described filtering ponds, between described filtering ponds and described blowoff basin, be provided with overflow baffle; Be provided with one or more rain water filtering device in described filtering ponds, the discharge outlet of described rain water filtering device is communicated with described blowoff basin, is connected with outlet pipe in described blowoff basin.
The present invention collects gravitational settling, screening, filtration and relief function carry out multistep treatment in one to rainwater, rainwater is after pre-settling tank removing deposit, floating thing in baffle arrangement interception rainwater also carries out preliminary purification to rainwater, then the rain water filtering device in filtering ponds carries out further filtration treatment to rainwater, effectively eliminate the particle in rainwater, the pollutant such as heavy metal and organic matter, the present invention utilizes effective technical process to reach very high purified treatment efficiency and pollutants removal rate, meet rainwater treatment demand, achieve qualified discharge or the reuse of rainwater, both water body environment was protected, alleviate again a lack of water difficult problem, when rainfall is very large, rainwater then can overflow to blowoff basin above overflow baffle, and which ensure that the rainwater entering purification apparatus is when exceeding the disposal ability of equipment, this purification apparatus also can run normally, this purification apparatus treatment effeciency is high, simple to operation, and without the need to exterior power, can automatically run, technique and operating cost are extremely low, this purification apparatus flexible in size, can adapt to various duty requirements, can carry out custom design according to actual conditions.
Further, described rain water filtering device comprises support baseboard and cover plate, described support baseboard is coaxially fixed with outer cartridge filter and central collection tube, described cover plate is covered in described outer cartridge filter top, described cover plate has central collection tube via hole, described support baseboard had the mouth of a river, described central collection tube top passes from described central collection tube via hole, draining cavity is surrounded inside described central collection tube, described central collection tube bottom is communicated with the described mouth of a river of crossing, filter medium is provided with between described outer cartridge filter and central collection tube, described central collection tube wall has some water holes, and each layer described water hole gross area increases progressively or equal from the bottom up.By arrangement water hole ingenious in central collection tube, when the water level of filter outside is lower, rainwater enters central collection tube from the bottom of filter, because the central collection tube lower floor water hole gross area is little, limit the rainwater flow entering central collection tube to a certain extent, outside rainwater water level is made to increase, so not only extend the time of contact of rainwater and lower end filter medium, also the filter medium of filter upper end is made to be fully utilized, thus significantly improve the utilization rate of filter medium, extend the time of contact of rainwater and filter medium, rainwater and filter medium is made to have sufficient contact, when the perforate gross area of each layer water hole on central collection tube wall is equal, also can ensure that upper level filter medium is fully utilized by restriction discharge outlet flow.
Further, the aperture of the described water hole on described central collection tube wall is consistent, and each layer described water hole quantity increases progressively or equal from the bottom up.
Further, the pore size of the described water hole on described central collection tube wall differs, and each layer described water hole gross area increases progressively or equal from the bottom up.
Further, be coaxially fixed with outer screen pack and filtering net successively from outside to inside between described outer cartridge filter and central collection tube, described filter medium is placed between described outer screen pack and described filtering net.
Further, the grain diameter of the described filter medium in outside is greater than the grain diameter of the described filter medium of inner side.
Further, described mistake on the mouth of a river is connected with drainpipe, and described drainpipe is provided with flow restriction.
Further, described central collection tube top seal; Or described central collection tube top is overflow collection mouth, the height of described overflow baffle is higher than described overflow collection mouth.When the top seal of central collection tube, when rainfall is very large, rainwater will overflow to blowoff basin above overflow baffle, and which ensure that the rainwater entering purification apparatus is when exceeding the disposal ability of equipment, this purification apparatus also can run normally; When central collection tube top is unlimited overflow collection mouth, when rainfall is very large, later stage rainwater is relatively cleaner, and later stage rainwater can directly enter filtration main sewer by overflow collection mouth and flow in blowoff basin; The height of overflow baffle is higher than overflow collection mouth, when rainfall is larger, more rainwater will overflow to blowoff basin above overflow baffle, which ensure that the rainwater entering this rainwater purification treatment facility is when exceeding the disposal ability of equipment, this rainwater purification treatment facility also can run normally.
Further, described baffle arrangement comprises fixed dam, and described fixed dam top is connected with debris retaining structure, and described fixed dam bottom was connected with water-bound.
Further, described debris retaining structure and described water-bound of crossing are respectively filter screen.The filter screen at fixed dam top can tackle the suspension in rainwater, and allows the rainwater through sedimentation enter filtering ponds; After rainwater-collecting terminates, the filter screen bottom fixed dam can allow the rainwater in pre-settling tank enter filtering ponds to carry out filtration treatment.
Further, described fixed dam is provided with one or more elongated slot from top to bottom, in described elongated slot, is provided with filter screen, or described fixed dam is provided with some apertures from top to bottom.After rainwater-collecting is disposed, the rainwater of pre-settling tank can enter filtering ponds slowly through the filter screen in elongated slot.
Further, described pre-settling tank bottom surface is lower than described filtering ponds bottom surface.The solid particles such as the silt in rainwater can be deposited on the bottom of pre-settling tank, and pre-settling tank bottom surface can make deposit to block water-bound lower than filtering ponds bottom surface.
Further, described baffle arrangement also comprises overhead gage, and the parallel described fixed dam of described overhead gage is arranged in described fixed dam front, and the bottom of described overhead gage is lower than the top of described debris retaining structure.Arrange overhead gage on debris retaining structure side, the bottom of overhead gage is lower than the top of debris retaining structure, and the bottom that rainwater need walk around overhead gage just enters filtering ponds by debris retaining structure again, effectively can tackle the floating thing in rainwater like this.
Further, described overhead gage is fixed on top, described multistep treatment pond; Or described overhead gage is floating barrier, described floating barrier top emerges above, and bottom is positioned at below the water surface.A floating barrier part is below the water surface, and a part, more than the water surface, can rise with the rising of water level, decline with the decline of water level, the floating thing thoroughly in interception rainwater.
Further, described fixed dam is shut; Or described fixed dam is orifice plate, and on described fixed dam, open pore size increases progressively from the bottom up.When fixed dam is orifice plate, not only there is interception function to suspension in water, and perforate size increases from the bottom up gradually, then little by the water flow of fixed dam bottom, the rainwater water level in pre-settling tank is made constantly to increase, extend the time of staying of rainwater in settling tank, be conducive to the abundant sedimentation of the solid particle such as silt in rainwater.
Further, multiple rain water filtering device is parallel with in described filtering ponds, and being provided with filtration main sewer bottom described filtering ponds, the described discharge outlet of rain water filtering device described in each is connected with described filtration main sewer respectively, and described filtration main sewer is connected with described blowoff basin.
Further, described multistage rainwater purification treatment facility is formed by multiple described multistep treatment ponds serial or parallel connection.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of rainwater multistage purification treatment facility.
Fig. 2 is the assembly structure schematic diagram of overhead gage and debris retaining structure and fixed dam.
Fig. 3 is a kind of distressed structure schematic diagram of Fig. 2.
Fig. 4 is the structural representation of rain water filtering device in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, is convenient to more clearly understand the present invention, but they do not form restriction to the present invention.
As shown in Figure 1, a kind of multistage rainwater purification treatment facility, comprises multistep treatment pond 301, and multistep treatment pond 301 comprises pre-settling tank 3011 from front to back successively, filtering ponds 3012 and blowoff basin 3013.Pre-settling tank 3011 bottom surface can lower than filtering ponds 3012 bottom surface, to enter the bottom that the solid particles such as the silt in the rainwater of pre-settling tank 3011 are more successfully deposited on pre-settling tank 3011, deposit needs periodic cleaning, is connected with water inlet pipe 302 in pre-settling tank 3011.Baffle arrangement 304 is provided with between pre-settling tank 3011 and filtering ponds 3012, baffle arrangement 304 comprises the fixed dam 3014 at middle part, fixed dam 3014 top is connected with the debris retaining structure 3015 for tackling suspension in rainwater, fixed dam 3014 bottom was connected with water-bound 3016, debris retaining structure 3015 and excessively water-bound 3016 all can adopt filter screen, the top, multistep treatment pond 301 in fixed dam 3014 front also can arrange the overhead gage 3020 toward downward-extension, the parallel fixed dam 3014 of overhead gage 3020 is arranged, and the bottom of overhead gage 3020 is lower than the top of debris retaining structure 3015, filtering ponds 3012 are entered by the filter screen at fixed dam 3014 top again after making rainwater need walk around the bottom of overhead gage 3020, thus the floating thing (as shown in Figure 2) more effectively tackled in rainwater, this overhead gage 3020 also can be floating barrier 3023, floating barrier 3023 part is below the water surface, a part is more than the water surface (as shown in Figure 3), floating barrier 3023 can rise with the rising of water level, can decline with the decline of water level, thoroughly can tackle the floating thing in rainwater like this, fixed dam 3014 can be shut, now, (valve is initially located in closed condition can to arrange valve in fixed dam 3014 bottom, when rainwater enters pre-settling tank 3011, valve is still closed, until when the water level of pre-settling tank 3011 reaches the highest, valve open, again until when the water level of pre-settling tank 3011 is down to minimum, valve is closed again), fixed dam 3014 also can be orifice plate or filter screen, open pore size on this orifice plate or filter screen increases progressively from the bottom up, the flow of such orifice plate or filter screen bottom is less than top, rainwater water level in pre-settling tank 3011 constantly rises, not only be conducive to the deposition of the solid particles such as silt in pre-settling tank 3011 in rainwater, and orifice plate or filter screen also can tackle the suspension in rainwater, in addition, fixed dam 3014 also can be provided with one or more elongated slot from top to bottom, filter screen is provided with in elongated slot, or fixed dam is provided with some apertures from top to bottom, after rainwater-collecting is disposed, the rainwater of pre-settling tank can enter filtering ponds slowly through the filter screen in elongated slot or the aperture on fixed dam.Three rain water filtering devices 3018 are parallel with in filtering ponds 3012, and bottom filtering ponds 3012, be provided with filtration main sewer 3022, the discharge outlet 3019 of each rain water filtering device 3018 is connected with filtration main sewer 3022 respectively, filter main sewer 3022 to be connected with blowoff basin 3013, outlet pipe 303 is connected with in blowoff basin 3013, rain water filtering device 3018 top is provided with overflow collection mouth 3021, be provided with overflow baffle 3017 between filtering ponds 3012 and blowoff basin 3013, the height of overflow baffle 3017 is higher than overflow collection mouth 3021 but lower than fixed dam 3014 top.Wherein, this multistage rainwater purification treatment facility also can take the version of multiple multistep treatment ponds 301 serial or parallel connection.
In such scheme, shown in composition graphs 4, rain water filtering device 3018 comprises support baseboard 101 and cover plate 102, support baseboard 101 and cover plate 102 all waterproof, support baseboard 101 is coaxially fixed with outer cartridge filter 103, outer screen pack 107, filtering net 108 and central collection tube 104 from outside to inside successively, and aforementioned each structural member is made by resistant material, filter medium 106 is provided with between outer screen pack 107 and filtering net 108, cover plate 102 is covered in outer cartridge filter 103, the top of outer screen pack 107 and filtering net 108, cover plate 102 can be dismantled, when pulling down cover plate 102, filter medium 106 can be changed, cover plate 102 has central collection tube via hole 102-1, support baseboard 101 center had mouth of a river 101-1, central collection tube 104 top passes from central collection tube via hole 102-1, draining cavity 105 is surrounded inside central collection tube 104, central collection tube 104 bottom is communicated with mistake mouth of a river 101-1, cross on the 101-1 of the mouth of a river and be connected with drainpipe 109, drainpipe 109 is provided with flow restriction 110, this flow restriction 110 can be excess-flow valve, central collection tube 104 tube wall has some water hole 104-1, each layer water hole 104-1 gross area increases progressively from the bottom up, wherein, the pore size of the water hole 104-1 on central collection tube 104 tube wall can be different, also can aperture consistent, when water hole 104-1 pore size on central collection tube 104 tube wall is consistent, each layer water hole 104-1 quantity increases progressively from the bottom up, central collection tube 104 top is overflow collection mouth 3021, overflow collection mouth 3021 is provided with openable overflow collection mouth filter screen 111.Wherein, outer cartridge filter 103, outer screen pack 107 and filtering net 108 can be cylinder, square tube or polygon net tubular; Central collection tube 104 can be pipe, square tube or polygon tubulose; This rain water filtering device can save outer screen pack 103 and filtering net 108, and in this case, the central collection tube via hole 102-1 in outer cartridge filter 103 and central collection tube 104 will ensure that filter medium 106 can not pass outer cartridge filter 103 and central collection tube 104; In addition, water hole 104-1 on central collection tube 104 tube wall, each layer water hole 104-1 gross area also can be equal, when water hole 104-1 pore size on central collection tube 104 tube wall is consistent, each layer water hole 104-1 quantity also can be equal, now, the flow by limiting discharge outlet 3019 also can ensure that upper level filter medium is fully utilized.
In such scheme, shown in composition graphs 4, filter medium 106 is in graininess, can be made up of one or more in compost, vermiculite, perlite, sand, zeolite, peat etc., also can be made up of the material of made multi-pore channel such as active carbon and ion-exchanger, its grain diameter is greater than the mesh aperture of outer screen pack 107 and filtering net 108 respectively, to ensure that filter medium 106 can not spill between outer screen pack 107 and filtering net 108; When filter medium 106 adopts multiple material, filter medium 106 can be divided into multilayer in the horizontal direction by variety classes and different-grain diameter, and the grain diameter near the filter medium 106 of outer screen pack 107 side is larger than the filter medium 106 grain diameter particle diameter of close filtering net 108 side.
The concrete operation principle of rain water filtering device 3018 is as follows: during the work of rain water filtering device 3018 normal filtration, rainwater enters filter medium 106 through outer cartridge filter 103 and outer screen pack 107 successively from rain water filtering device 3018 outside, the water hole 104-1 of rainwater after filtration after media filtration more successively on filtering net 108 and central collection tube 104 enters draining cavity 105, rainwater after processing after filtration in draining cavity 105 is discharged by drainpipe 109 again, wherein, the perforate gross area of the water hole 104-1 on central collection tube 104 tube wall increases progressively from lower floor toward upper strata or equal, when the water level of rain water filtering device 3018 outside is lower, rainwater enters central collection tube 104 from the bottom of rain water filtering device 3018, because the central collection tube lower floor water hole 104-1 gross area is little, limit the rainwater flow entering central collection tube 104 to a certain extent, outside rainwater water level is made to increase, the filter medium of such rain water filtering device 3018 internal upper part just can be fully utilized, meanwhile, be provided with excess-flow valve in the downstream of drainpipe 109, rainwater can be made to have sufficient contact with filter medium 106 by the flow that restricts export, reach the object effectively removing pollutant, along with the continuous rising of water level, when the water level of rain water filtering device 3018 outside reaches the top of central collection tube 104, the later stage rainwater just direct overflow collection mouth 3021 from central collection tube 104 top enters draining cavity 105 (when rainfall is very large, rainwater directly can enter draining cavity 105 from overflow collection mouth 3021), the overflow collection mouth filter screen 111 at overflow collection mouth 3021 place can retain floating thing in rainwater and suspension, whole filter process not only ensure that fully contacting of rainwater and filter medium 106, effectively can remove the pollutant in rainwater, also ensure that the treatment effeciency of rain water filtering device 3018, after dmp filter processing procedure terminates, filter medium 106 can block by contaminated thing to a certain extent, take off openable overflow collection mouth filter screen 111, and close excess-flow valve, from central collection tube 104 top, back flush is carried out to filter medium with external source, the pollutant part retained in filter medium 106 can be gone out filter, improve the penetrating power of filter medium 106.
Shown in Fig. 1, the course of work of multistage rainwater purification treatment facility is as follows: when starting to collect rainwater, rainwater enters pre-settling tank 3011 from water inlet pipe 302, because the separation of fixed dam 3014, just start rainwater and can not enter filtering ponds 3012 very soon, only have the rainwater of seldom amount can enter filtering ponds 3012 from the water-bound 3016 (that is: the filter screen bottom fixed dam) of crossing below fixed dam 3014; Along with the rising of rainwater water level in pre-settling tank 3011, the solid particles such as the silt in rainwater can be deposited on the bottom of pre-settling tank 3011, because pre-settling tank 3011 bottom surface is lower than filtering ponds 3012 bottom surface, deposit can not block water-bound 3016 (that is: the filter screen bottom fixed dam 3014); Along with the rising of pre-settling tank 3011 middle water level, when reaching the height of debris retaining structure 3015 (that is: the filter screen at fixed dam 3014 top), rainwater through sedimentation can enter filtering ponds 3012 by debris retaining structure 3015, suspension in rainwater can be tackled by debris retaining structure 3015, and floating thing can by arranging overhead gage 3020 or floating barrier 3023 is blocked; After rainwater enters filtering ponds 3012, rainwater can enter each rain water filtering device 3018 from rain water filtering device 3018 outside inner, rainwater after the process of rain water filtering device 3018 multi-filtering can collect in and filter in main sewer 3022, then flow into blowoff basin 3013, finally discharge multistep treatment pond 301 by outlet pipe 303; When rainfall is very large, later stage rainwater is relatively cleaner, and later stage rainwater can directly enter filtration main sewer 3022 by the overflow collection mouth 3021 of rain water filtering device and flow in blowoff basin 3013; When rainfall is larger, more rainwater will overflow to blowoff basin 3013 above overflow baffle 3017, and which ensure that the rainwater entering this rainwater purification treatment facility is when exceeding the disposal ability of equipment, this rainwater purification treatment facility also can run normally.

Claims (17)

1. a multistage rainwater purification treatment facility, comprise multistep treatment pond (301), it is characterized in that: described multistep treatment pond (301) comprises pre-settling tank (3011) from front to back successively, filtering ponds (3012) and blowoff basin (3013), water inlet pipe (302) is connected with in described pre-settling tank (3011), be provided with baffle arrangement (304) between described pre-settling tank (3011) and described filtering ponds (3012), between described filtering ponds (3012) and described blowoff basin (3013), be provided with overflow baffle (3017); One or more rain water filtering device (3018) is provided with in described filtering ponds (3012), the discharge outlet (3019) of described rain water filtering device (3018) is communicated with described blowoff basin (3013), is connected with outlet pipe (303) in described blowoff basin (3013).
2. multistage rainwater purification treatment facility according to claim 1, it is characterized in that: described rain water filtering device (3018) comprises support baseboard (101) and cover plate (102), it is characterized in that: described support baseboard (101) is coaxially fixed with outer cartridge filter (103) and central collection tube (104), described cover plate (102) is covered in described outer cartridge filter (103) top, described cover plate (102) has central collection tube via hole (102-1), described support baseboard (101) had the mouth of a river (101-1), described central collection tube (104) top passes from described central collection tube via hole (102-1), described central collection tube (104) inner side surrounds draining cavity (105), described central collection tube (104) bottom is communicated with the described mouth of a river (101-1) of crossing, filter medium (106) is provided with between described outer cartridge filter (103) and central collection tube (104), described central collection tube (104) tube wall has some water holes (104-1), and the described water hole of each layer (104-1) gross area increases progressively or equal from the bottom up.
3. multistage rainwater purification treatment facility according to claim 2, it is characterized in that: the aperture of the described water hole (104-1) on described central collection tube (104) tube wall is consistent, the described water hole of each layer (104-1) quantity increases progressively or equal from the bottom up.
4. multistage rainwater purification treatment facility according to claim 2, it is characterized in that: the pore size of the described water hole (104-1) on described central collection tube (104) tube wall differs, the described water hole of each layer (104-1) gross area increases progressively or equal from the bottom up.
5. multistage rainwater purification treatment facility according to claim 2, it is characterized in that: be coaxially fixed with outer screen pack (107) and filtering net (108) from outside to inside successively between described outer cartridge filter (103) and central collection tube (104), described filter medium (106) is placed between described outer screen pack (107) and described filtering net (108).
6. multistage rainwater purification treatment facility according to claim 2, is characterized in that: the grain diameter of the described filter medium (106) in outside is greater than the grain diameter of the described filter medium (106) of inner side.
7. multistage rainwater purification treatment facility according to claim 2, it is characterized in that: described mistake on the mouth of a river (101-1) is connected with drainpipe (109), and described drainpipe (109) is provided with flow restriction (110).
8. multistage rainwater purification treatment facility according to claim 2, is characterized in that: described central collection tube (104) top seal; Or described central collection tube (104) top is overflow collection mouth (3021), the height of described overflow baffle (3017) is higher than described overflow collection mouth (3021).
9. multistage rainwater purification treatment facility according to claim 1, it is characterized in that: described baffle arrangement (304) comprises fixed dam (3014), described fixed dam (3014) top is connected with debris retaining structure (3015), and described fixed dam (3014) bottom was connected with water-bound (3016).
10. multistage rainwater purification treatment facility according to claim 9, is characterized in that: described debris retaining structure (3015) and described water-bound (3016) of crossing are respectively filter screen.
11. multistage rainwater purification treatment facilities according to claim 9, it is characterized in that: (3014) are provided with one or more elongated slot from top to bottom with described fixed dam, be provided with filter screen in described elongated slot, or described fixed dam (3014) is provided with some apertures from top to bottom.
12. multistage rainwater purification treatment facilities according to claim 1, is characterized in that: described pre-settling tank (3011) bottom surface is lower than described filtering ponds (3012) bottom surface.
13. multistage rainwater purification treatment facilities according to claim 9, it is characterized in that: described baffle arrangement (304) also comprises overhead gage (3020), the parallel described fixed dam (3014) of described overhead gage (3020) is arranged in described fixed dam (3014) front, and the bottom of described overhead gage (3020) is lower than the top of described debris retaining structure (3015).
14. multistage rainwater purification treatment facilities according to claim 13, is characterized in that: described overhead gage (3020) is fixed on described multistep treatment pond (301) top; Or described overhead gage (3020) is floating barrier (3023), described floating barrier (3023) top emerges above, and bottom is positioned at below the water surface.
15. multistage rainwater purification treatment facilities according to claim 9, is characterized in that: described fixed dam (3014) is shut; Or described fixed dam (3014) is orifice plate, and the upper open pore size of described fixed dam (3014) increases progressively from the bottom up.
16. multistage rainwater purification treatment facilities according to claim 1, it is characterized in that: in described filtering ponds (3012), be parallel with multiple rain water filtering device (3018), and described filtering ponds (3012) bottom is provided with filtration main sewer (3022), the described discharge outlet (3019) of rain water filtering device described in each (3018) is connected with described filtration main sewer (3022) respectively, and described filtration main sewer (3022) is connected with described blowoff basin (3013).
17. multistage rainwater purification treatment facilities according to claim 1, is characterized in that: described multistage rainwater purification treatment facility is formed by multiple described multistep treatment pond (301) serial or parallel connection.
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Cited By (5)

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CN105396350A (en) * 2015-11-26 2016-03-16 苏州市清泽环境技术有限公司 Unpowered rainwater solid waste and particulate matter interception sieve tube and interception device
CN105417750A (en) * 2015-12-02 2016-03-23 金建明 Water circulation system
CN105442697A (en) * 2015-12-03 2016-03-30 武汉圣禹排水系统有限公司 Flotage interception device
CN106904759A (en) * 2017-03-29 2017-06-30 广东亘盈环保实业集团有限公司 A kind of urban rainwater processing unit
CN107551668A (en) * 2017-09-30 2018-01-09 武汉圣禹排水系统有限公司 A kind of low water damage dmp filter pond

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