CN209226683U - It is classified biofiltration arresting device - Google Patents

Abstract

The utility model discloses a kind of classification biofiltration arresting devices, comprising: the delaying basin of top end opening, the bottom of pond of delaying basin are equipped with dividing wall vertically, and dividing wall is used to delaying basin being divided into two independent first filtering areas and the second filtering area.First filtering area is laid with the first gravel layer for being filtered to the particulate matter contained in rainwater along rainwater flow direction, forms the first aquifer of hypoxic/anaerobic environment for making rainwater be detained, and is also embedded in the first filtering area for rainwater to be treated to be imported to the inlet pipeline in the first gravel layer.In second filtering area along rainwater flow direction be successively laid with the second aquifer for accumulate the rainwater by the first aquifer overflow out, coating, the biological filter media layer for filtering again for particulate matter remaining in rainwater and organic pollutant remaining in rainwater being adsorbed and degraded simultaneously, for realizing the second gravel layer of Quick drainage, be embedded with discharge pipe line in the second gravel layer.

Description

It is classified biofiltration arresting device

Technical field

The utility model relates to sponge urban construction and low influence development field, particularly, are related to a kind of biological mistake of classification Filter arresting device.

Background technique

Currently, traditional cities rainwater " fast row " mode has been not suitable with current economic, society and harmonious development requirement, And then novel " sponge urban construction " mode is come into being." sponge urban construction " preferentially utilizes natural drainage systems, construction life State pumping equipment, give full play to urban green space, road, water system etc. to the absorption of rainwater, it is lower seep, be detained, accumulation and catharsis, Hydrological characteristics after building city development are effectively relieved urban waterlogging, cut down urban runoff pollutional load, protect close to before exploitation Shield and improvement urban ecological environment.

Initial rainwater refers generally to the precipitation that ground 10~15mm thickness has formed rainwash.Due to rainfall initial stage, rainwater is molten The pollution gas such as a large amount of sour gas, vehicle exhaust, the plant gas in air are solved, behind ground of landing, and due to washing away Roofing, road and hardened ground etc. so that contain a large amount of polluter in initial rainwater, the pollution level of initial rainwater compared with Height, or even have exceeded the pollution level of municipal sewage.Initial rainwater index is needed often beyond surface water V class water quality indicator, chemistry Oxygen amount (COD) reaches 200mg/L or more, and total phosphorus (TP) is generally in 1.0mg/L or more, NH₃Close to 3.0mg/L, rain dirt mixing overflow Sewage (CSO) water quality is similar with initial rainwater situation.Rainwash is in line through rain pipe or the overflow of confluence of rainwater and sewage pipe is to water body, is One of an important factor for causing black and odorous water.

Currently, it is less for initial rainwater or CSO treatment process facility, it is main to be set using conventional low influence exploitation (LID) It applies, such as Rain Garden facility is handled, these facilities or device essential structure are detailed in Fig. 1.Initial rainwater or CSO are from upper past Under flow through aquifer, coating, biological filter media layer, granule rock layers, cobble rock layers.It is seeped under initial rainwater or CSO filtered Cheng Zhong, floating material coarse first can be coated cap rock retention, and subsequent fine particle and suspended matter etc. are retained by biological filter media.By Only coarse floating material is simply intercepted in coating, big particle object and the tiny particles content overwhelming majority enter biofiltration Dielectric layer, but the porosity of biological filter media layer is smaller than the porosity for the granule rock layers that lower section is arranged, so biofiltration is situated between Matter layer reaches filtering saturation first, does not only result in head loss and increases fastly, hammed water easy to form makes microorganism and battalion in dielectric layer It supports substance to be lost, while the pollutants such as suspended matter not being trapped are easy to cause downstream water to pollute through overflow port overflow；Especially It filters saturation importantly, biological filter media layer reaches first, causes integral filter detention period to greatly shorten, and then make Biofiltration effect rapid decrease, filtrate update frequent.

Utility model content

The utility model provides a kind of classification biofiltration arresting device, to solve the low influence development facility of existing routine Existing head loss increases hammed water fast, easy to form, in dielectric layer microorganism and nutriment be lost, downstream water easy to pollute Body, filtration retentate period greatly shorten, biofiltration effect rapid decrease and filtrate update frequent technical problem.

The technical solution adopted in the utility model is as follows:

A kind of classification biofiltration arresting device, comprising: the delaying basin of top end opening, the bottom of pond of delaying basin are equipped with point vertically Partition wall, dividing wall be used for by delaying basin be divided into two it is independent be used to be filtered rainwater and it is biodegradable first filtering Area, and for by the first filtering area, treated that rainwater filter again and biodegradable second filtering area；First filtering Successively it is laid with along rainwater flow direction what the particulate matter for containing in the rainwater to importing was filtered in area from the bottom to top First gravel layer, for make to be detained by the filtered rainwater of the first gravel layer so that the first filtering area formed stable anoxic/ First aquifer of anaerobic environment is also embedded in the first filtering area for the rainwater of purified treatment to be filtered to be imported the first gravel Inlet pipeline in rock layers；It is from top to bottom successively laid in second filtering area along rainwater flow direction and is stored for accumulating by first Second aquifer of the rainwater that water layer overflow goes out, is used for by remaining particle in the filtered rainwater of coating coating Object filter again and organic pollutant remaining in rainwater is adsorbed and is degraded simultaneously biological filter media layer, for pair The second gravel layer of Quick drainage is realized by biological filter media layer treated rainwater, is embedded with and is used in the second gravel layer Filtered rainwater conflux is drained into the discharge pipe line in drainage inspection well or receiving water body.

Further, the first gravel layer include for the biggish big particle object of the partial size contained in the rainwater being introduced into First cobble rock layers of row retention, the top for being laid in the first cobble rock layers are simultaneously used for after the retention of the first cobble rock layers First granule rock layers of the lesser tiny particles content of the partial size contained in rainwater and the retention of remaining big particle object；First cobble The porosity of rock layers is greater than the porosity of the first granule rock layers.

Further, inlet pipeline includes the water inlet pipe introduced rainwater in the first filtering area, and water inlet pipe is connected with more For by the water distribution branch pipe in rainwater Decentralized Pull in the first cobble rock layers；Water distribution branch pipe is embedded in the first cobble rock layers.

Further, classification biofiltration arresting device further includes for making rainwater or cleaning first in the first filtering area The draining emptying structure that the trapped substance that filtering area generates discharges, draining emptying structure includes: to be laid under the first gravel layer Side so that rainwater or trapped substance confluence be discharged gutter, be connected to gutter and be used for by gutter rainwater or retention The tapping pipe group of the first filtering area is discharged in object.

Further, the layer bottom surface of the first gravel layer is the inclined-plane being obliquely installed；Gutter is located at the first gravel bottom layer by layer The lower position in face, and the upper top surface in gutter is equipped with grid, gutter is connected to by grid with the layer bottom surface of the first gravel layer； Tapping pipe group includes the blow-down pipe being connected to gutter, the blow valve being set on blow-down pipe, is sheathed on outside blow valve and vertical It is arranged and the valve sleeve of earth's surface is stretched out on top, bottom end is connected with blow valve and the blow valve behaviour on top stretching valve sleeve top Vertical pole.

Further, successively spaced multiple empty slots in the width direction are offered on dividing wall, are equipped at each empty slot For adjusting the adjustable weir plate for accumulating rainwater water level height in the first aquifer；Adjustable weir plate is connected on dividing wall, and with point The link position of partition wall is adjustable in the height direction.

Further, the second gravel layer includes successively being laid up and down along rainwater flow direction for by biofiltration Dielectric layer treated rainwater realizes the second granule rock layers and the second cobble rock layers of Quick drainage；The hole of second granule rock layers Rate less than the second cobble rock layers porosity, and the porosity of the second granule rock layers be greater than biological filter media layer porosity.

Further, discharge pipe line includes being embedded in the second cobble rock layers for penetrating into rainwater after retention to converge Permeable blind pipe is coated on the geotextiles for being used to prevent particulate matter from entering Permeable blind pipe outside Permeable blind pipe, is connected with Permeable blind pipe Horizontal main pipe, the overflow well for being connected to horizontal main pipe and being laid in the second filtering area vertically are connected to overflow well with by rainwater and excessive Stream rainwater drains into the drainpipe of drainage inspection well or receiving water body.

Further, the overflow port bottom end on overflow well top is the aquifer of the second filtering area away from the height at the top of coating Highly, and the overflow port top on overflow well top be lower than delaying basin top end opening height；The quantity of Permeable blind pipe is more, water Plain cloth is set in the second cobble rock layers, and more Permeable blind pipes are connected with horizontal main pipe.

Further, classification biofiltration arresting device further includes filling for being passed through the aeration of air into the second filtering area Set, aerator include: the aerator being set to outside delaying basin, be connected with aerator with provide the solar panel of the energy and Battery is connected so that air to be passed through to the snorkel in the second filtering area with aerator.

The utility model has the following beneficial effects:

The classification biofiltration arresting device function division of the utility model is clear, takes classification biofiltration delay side Method, the first filtering area use the biofiltration of upward flow gravel, can realize to the full extent and persistently effectively cut dirty and biodegrade, It is able to satisfy whole device continuous and steady operation again, the second filtering area is filtered using Biomedia, the more effective absorption for playing medium, Filtering, microbial degradation and delay effect, and then improve organic pollutant removal clean-up effect in rainwater；Again first due to rainwater Again by biological filter media layer after being filtered by the first gravel layer, and the porosity of the first gravel layer is greater than biological filter media The porosity of layer, the first gravel layer, which can not only filter most particulate matter in rainwater, to carry out biodegrade to rainwater, To not only can ensure that biological filter media layer is not easy to plug, and make biofiltration when rainwater flows through biological filter media layer Dielectric layer can more effectively play absorption, filtering, delay and the microbiological deterioration to pollutant, and then improve pollutant and go Except clean-up effect, and greatly prolong integral filter detention period, so greatly promote biofiltration effect, filtrate without frequency Numerous update, processing cost substantially reduce；In addition, being equipped with the second gravel layer, the hole of the second gravel layer below biological filter media layer The porosity that gap rate is greater than biological filter media layer not will cause microorganism in rainwater so that whole device is not easy to form hammed water It is lost, while downstream water will not be polluted with nutriment；The device of the utility model is easy to operate, is easily managed, And it can be grouped parallel running, when filtrate needs to update, the first filtering area and the second filtering area do not interfere with each other, are independent of each other, Whole device can keep continually and steadily running.

Other than objects, features and advantages described above, there are also other purposes, feature and excellent for the utility model Point.Below with reference to figure, the utility model is described in further detail.

Detailed description of the invention

The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model Illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.In attached drawing In:

Fig. 1 is conventional low influence development facility essential structure schematic diagram；

Fig. 2 is the classification biofiltration arresting device schematic diagram of the preferred embodiment in the utility model.

Marginal data

10, delaying basin；20, dividing wall；30, the first gravel layer；31, the first cobble rock layers；32, the first granule rock layers；40, First aquifer；50, inlet pipeline；51, water inlet pipe；52, water distribution branch pipe；60, the second aquifer；70, coating；80, biological Filtering medium layer；90, the second gravel layer；91, the second granule rock layers；92, the second cobble rock layers；100, discharge pipe line；101, thoroughly Water blind pipe；102, overflow well；1020, overflow port；103, horizontal main pipe；104, drainpipe；110, emptying structure is drained；111, it drains Ditch；112, tapping pipe group；120, adjustable weir plate；130, aerator；131, aerator；132, solar panel；133, it stores Battery；134, snorkel；140, pipe is cleaned.

Specific embodiment

The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

Referring to Fig. 2, the preferred embodiment of the utility model provides a kind of classification biofiltration arresting device, comprising: top The delaying basin 10 of end opening, the bottom of pond of delaying basin 10 are equipped with dividing wall 20 vertically, and dividing wall 20 is for delaying basin 10 to be divided into Two it is independent for rainwater be filtered with biodegradable first filtering area, and for by the first filtering area handle Rainwater afterwards filters again and biodegradable second filtering area.In first filtering area from the bottom to top successively along rainwater flow direction It is laid with the first gravel layer 30 that the particulate matter for containing in the rainwater to importing is filtered, for making by the first gravel The filtered rainwater of layer 30 are detained so that the first filtering area forms the first aquifer 40 of stable hypoxic/anaerobic environment, and first It is also embedded in filtering area for the rainwater of purified treatment to be filtered to be imported to the inlet pipeline 50 in the first gravel layer 30.Second It is from top to bottom successively laid with along rainwater flow direction in filtering area for accumulating the rainwater gone out by 40 overflow of the first aquifer Second aquifer 60, coating 70, for being filtered again simultaneously to by remaining particulate matter in the filtered rainwater of coating 70 Organic pollutant remaining in rainwater is adsorbed and degraded simultaneously biological filter media layer 80, for by biological mistake Treated the rainwater of filter medium layer 80 realizes the second gravel layer 90 of Quick drainage, is embedded in the second gravel layer 90 for by mistake Rainwater conflux after filter drains into the discharge pipe line 100 in drainage inspection well or receiving water body.

The action principle of the classification biofiltration arresting device of the utility model are as follows: the rainwater of surface layer (refers to initial rainwater Or rain dirt mixing overflow trapped substance) be introduced into the first gravel layer 30 of the first filtering area by inlet pipeline 50 first, then rainwater The first gravel layer 30 is flowed through from bottom to top, since the first filtering area is hypoxic/anaerobic ambient zone, so rainwater is in the first gravel layer Biofiltration is carried out in 30, i.e., most particulate matter in rainwater is filtered by the first gravel layer 30, while passing through the first filtering The hypoxic/anaerobic environment in area carries out biodegrade (the biodegradable principle are as follows: due to the first storage of hypoxic/anaerobic organic pollutant Water layer 40 is hypoxic/anaerobic environment, is that heterotroph facultative anaerobic denitrifying bacteria and polyP bacteria create good living environment, It is attached to the gravel surface mass propagation of the first gravel layer 30, when rainwater passes through the first gravel layer 30, facultative anaerobic denitrification For bacterium using Organic substance in water as electrical donor, nitrate nitrogen carries out anti-nitration reaction and metabolic activity as electron acceptor, this One process had not only assimilated denitrification (contract) and has formed organonitrogen compound, but also alienation denitrification (decomposition) forms final product dinitrogen (nitrogen), total nitrogen accordingly reduces in rainwater, meanwhile, polyP bacteria is lauched the intracorporal adenosine triphyosphate of solution in anaerobic environment (ATP), phosphorus and energy are discharged), the rainwater after biofiltration is detained in the first aquifer 40；First aquifer, 40 upper layer Again by the top overflow of dividing wall 20 into the second aquifer 60, the rainwater in the second aquifer 60 continues downstream to covering rainwater Layer 70 carries out the filtering of particulate matter under the action of coating 70；Continue by the filtered rainwater of coating 70 downstream to life Object filtering medium layer 80, and under the action of biological filter media layer 80, the remaining particulate matter of rain water part is filtered, and to rain The organic pollutant contained in water is adsorbed and is degraded；By the filtered rainwater of biological filter media layer 80 continue downstream to In second gravel layer 90, and under the effect of the filtration, purification of the second gravel layer 90, final outflow water drains into draining by discharge pipe line 100 In inspection shaft or receiving water body, to complete the filtration retentate period of whole device.

The classification biofiltration arresting device function division of the utility model is clear, takes classification biofiltration delay side Method, the first filtering area use the biofiltration of upward flow gravel, can realize to the full extent and persistently effectively cut dirty and biodegrade, It is able to satisfy whole device continuous and steady operation again, the second filtering area is filtered using Biomedia, the more effective absorption for playing medium, Filtering, microbial degradation and delay effect, and then improve organic pollutant removal clean-up effect in rainwater；Again first due to rainwater Again by biological filter media layer 80 after being filtered by the first gravel layer 30, and the porosity of the first gravel layer 30 is greater than biological mistake The porosity of filter medium layer 80, the first gravel layer 30 can not only filter most particulate matter in rainwater and can also carry out to rainwater Biodegrade, thus not only can ensure that biological filter media layer 80 is not easy to plug when rainwater flows through biological filter media layer 80, And biological filter media layer 80 is enable more effectively to play absorption, filtering, delay and microbiological deterioration to pollutant, into And pollutant removal clean-up effect is improved, and greatly prolong integral filter detention period, and then make biofiltration effect significantly It is promoted, filtrate is substantially reduced without frequent updating, processing cost；In addition, being equipped with the second gravel below biological filter media layer 80 Layer 90, the porosity of the second gravel layer 90 is greater than the porosity of biological filter media layer, so that whole device is not easy to form hammed water, It not will cause microorganism and nutriment in rainwater to be lost, while downstream water will not be polluted；The dress of the utility model Set it is easy to operate, be easily managed, and parallel running can be grouped, when filtrate needs to update, the first filtering area and the second filtering Area does not interfere with each other, is independent of each other, and whole device can keep continually and steadily running.

Optionally, as shown in Fig. 2, the first gravel layer 30 includes for biggish thick to the partial size contained in the rainwater being introduced into The first cobble rock layers 31 that large particle is retained, the top for being laid in the first cobble rock layers 31 and for thick by first The first of the lesser tiny particles content of partial size and the retention of remaining big particle object that contain in rainwater after the retention of gravel layer 31 Granule rock layers 32.The porosity of first cobble rock layers 31 is greater than the porosity of the first granule rock layers 32.Rainwater flows through the first gravel When layer 30, the biggish first cobble rock layers 31 of grain diameter are first passed around, since the porosity of the first cobble rock layers 31 is larger, therefore And can not only continue to retain the biggish big particle object of partial size for a long time, and the first granule rock layers 32 on energy effective protection upper layer, make It avoids the blocking of big particle object, extends the first granule rock layers 32 to the effectively catching week of the lesser tiny particles content of partial size Phase.Rainwater by the first cobble rock layers 31 filtering after enter the lesser first granule rock layers 32 of partial size, the first granule rock layers 32 after Continuous intercept filters the big particle object that could not be truncated to by lower layer's the first cobble rock layers 31 and tiny particles content, since lower layer first is thick Gravel layer 31 cuts dirty protective effect, alleviates upper layer the first granule rock layers 32 and cuts dirty pressure, and makes pollutant in entire filtering layer Distribution tends to uniformly, and then entire filtering layer can be fully utilized, to improve the first gravel layer 30 to the maximum extent Retaining power, and play a protective role to biological filter media layer 80.In other embodiments, the gravel of the first gravel layer 30 Partial size is gradually reduced from bottom to top, so that particulate matter can be filtered step by step after flowing through the first gravel layer 30 in rainwater, can be subtracted The space that few particulate matter moves up, to reduce the impact force that particulate matter moves up and the probability for being reduced through the first gravel layer 30.

In the specific embodiment of this optinal plan, the partial size of coarse gravel is 30mm~50mm in the first cobble rock layers 31.The The partial size of bird's-eye gravel is 5mm~10mm in one granule rock layers 32.When actual setting, the partial size of coarse gravel in the first cobble rock layers 31 Range, the thickness of the first cobble rock layers 31, in the first granule rock layers 32 bird's-eye gravel particle size range, the thickness of the first granule rock layers 32 Degree etc. is all in accordance with COD in rainwater (COD), BOD (BOD₅), suspended matter (SS), total nitrogen (TN) and total phosphorus (TP) situations such as, is specifically arranged.

Optionally, as shown in Fig. 2, inlet pipeline 50 includes the water inlet pipe 51 introduced rainwater in the first filtering area, water inlet Pipe 51 is connected with more and is used for the water distribution branch pipe 52 in the first cobble of rainwater Decentralized Pull in rock layers 31.Water distribution branch pipe 52 is embedded in In first cobble rock layers 31.

Optionally, as shown in Fig. 2, classification biofiltration arresting device further include for make rainwater in the first filtering area or The draining emptying structure 110 that the trapped substance of the first filtering area generation discharges is cleaned, draining emptying structure 110 includes: to lay In the lower section of the first gravel layer 30 so that rainwater or trapped substance confluence be discharged gutter 111, with gutter 111 be connected to and be used for By the tapping pipe group 112 of rainwater or trapped substance the first filtering area of discharge in gutter 111.The first filtering area of the utility model bottom Setting draining emptying structure 110 in portion's is not only convenient for the first filtering area of emptying, while convenient for the first gravel in the first filtering area of cleaning The trapped substance discharge that layer 30 generates.

In the specific embodiment of this optinal plan, as shown in Fig. 2, the layer bottom surface of the first gravel layer 30 be obliquely installed it is oblique Face.Gutter 111 is located at the lower position of first 30 layers of bottom surface of gravel layer, and the upper top surface in gutter 111 is equipped with grid, draining Ditch is connected to by grid with the layer bottom surface of the first gravel layer 30, smooth along inclined-plane convenient for rainwater or trapped substance, rapidly flow into In gutter 111.Tapping pipe group 112 includes the blow-down pipe being connected to gutter 111, the blow valve being set on blow-down pipe, set Outside blow valve and it is vertically arranged and the valve sleeve of earth's surface is stretched out on top, bottom end is connected with blow valve and top stretching valve The emptying valve operating rod of cannula tip, consequently facilitating controlling the switch of blow valve outside.

Optionally, as shown in Fig. 2, offering successively spaced multiple empty slots in the width direction on dividing wall 20, respectively The adjustable weir plate 120 for adjusting accumulation rainwater water level height in the first aquifer 40 is equipped at empty slot.Adjustable weir plate 120 connects In on dividing wall 20, and it is adjustable in the height direction with the link position of dividing wall 20.In the specific embodiment of this optinal plan, Adjustable weir plate 120 passes through attachment screw, connection bolt etc. and is connected with dividing wall 20, and by attachment screw, connection bolt and divides The link position of partition wall 20 adjusts adjustable 120 opposing spaced apart wall 20 of weir plate in the height of vertical direction, and then adjusts the first water storage The height of rainwater water level can be accumulated in layer 40.The utility model use adjustable weir plate 120, can according to filtering situation flexible modulation can The height of weir transfer plate 120 guarantees the filtering of device normal table.

In the utility model specific embodiment, biological filter media layer includes sand, original soil, coco bran.Not only make biofiltration Dielectric layer 80 can more effectively play absorption, filtering, delay and the microbiological deterioration to pollutant, and then further increase Pollutant removal clean-up effect also greatly prolongs integral filter detention period, and then biofiltration effect is made to greatly promote, filter Expect that service life is long.

Optionally, as shown in Fig. 2, coating 70 includes bark.Coating 70 alleviates lower layer for adsorbing certain moisture The time that soil dries out, and have the function of primary filtration, it can also protection against erosion, the water body stream in reduction biological filter media layer 80 It loses.

Optionally, as shown in Fig. 2, the second gravel layer 90 includes successively being laid up and down along rainwater flow direction for warp Cross biological filter media layer 80 treated the second granule rock layers 91 and the second cobble rock layers 92 that rainwater realizes Quick drainage.The The porosity of two granule rock layers 91 less than the second cobble rock layers 92 porosity, and the porosity of the second granule rock layers 91 be greater than life The porosity of object filtering medium layer 80.When rainwater flows through the second gravel layer 90, the second bird's-eye gravel of porosity is first flowed through Layer 91, is then further continued for flowing through the biggish second cobble rock layers 92 of porosity, since the porosity of the second granule rock layers 91 is less than The porosity of second cobble rock layers 92, and the porosity of the second granule rock layers 91 is greater than the porosity of biological filter media layer 80, To not only keep rainwater smooth downstream to continuing to filter in the second gravel layer 90, additionally it is possible to keep rainwater stagnant in the second gravel layer 90 It stays, to penetrate into the discharge pipe line 100 for being embedded in this layer.In other embodiments, the grain size of gravel of the second gravel layer 90 by Be gradually increased under so that in rainwater particulate matter flow through that the second gravel layer is after 90s being capable of quickly downward seepage flow discharge.

In the utility model specific embodiment, the particle size range of bird's-eye gravel is 3mm~8mm in the second granule rock layers 91.The The particle size range of coarse gravel is 20mm~40mm in two cobble rock layers 92.When actual setting, coarse gravel in the second cobble rock layers 92 Particle size range, the thickness of the second cobble rock layers 92, in the second granule rock layers 91 bird's-eye gravel particle size range, the second granule rock layers 91 thickness etc. is all in accordance with COD in rainwater (COD), BOD (BOD₅), suspended matter (SS), total nitrogen (TN) and Situations such as total phosphorus (TP), is specifically arranged.

Optionally, as shown in Fig. 2, discharge pipe line 100 includes being embedded in the second cobble rock layers 92 for making rain after retaining Water penetrate into converge Permeable blind pipe 101, be coated on outside Permeable blind pipe 101 for preventing particulate matter from entering Permeable blind pipe 101 Geotextiles, the horizontal main pipe 103 being connected with Permeable blind pipe 101 are connected to horizontal main pipe 103 and are laid in the second filtering area vertically Overflow well 102 is connected to so that purified rainwater and overflowing rain water are drained into drainage inspection well or receiving water body with overflow well 102 Drainpipe 104.Further degree, discharge pipe line 100 further include the main sewer being connected with horizontal main pipe 103, main sewer again with it is excessive Well 102 is flowed to be connected.

In the specific embodiment of this optinal plan, 1020 bottom end of overflow port on 102 top of overflow well away from coating at the top of Height is the water storage layer height of the second filtering area, and 1020 top of overflow port on 102 top of overflow well is lower than 10 top of delaying basin The height of opening.The quantity of Permeable blind pipe 101 is more, and horizontal layout is in the second cobble rock layers 92, more Permeable blind pipes 101 It is connected with horizontal main pipe 103.

Optionally, as shown in Fig. 2, the classification biofiltration arresting device of the utility model further includes being laid in second vertically Cleaning pipe 140 in filtering area, the top for cleaning pipe 140 are higher than coating 70, clean bottom end and the Permeable blind pipe 101 of pipe 140 Connection cleans pipe 140 and is used to import ejected wash water in Permeable blind pipe 101 to clean Permeable blind pipe 101, horizontal main pipe 103, overflow well 102 and drainpipe 104 etc..

Optionally, as shown in Fig. 2, classification biofiltration arresting device further includes for being passed through air into the second filtering area Aerator 130, aerator 130 includes: the aerator 131 being set to outside delaying basin 10, is connected to mention with aerator 131 Solar panel 132 and battery 133 for the energy are connected with aerator 131 air to be passed through in the second filtering area Snorkel 134.In the utility model, the first filtering area is hypoxic/anaerobic biodegrade area, and the second filtering area is equipped with aerator 130, oxygen is provided for aerobic microbiological, pollutant removal is improved by hypoxic/anaerobic aerobic microbiological biodegradation Effect, so that effluent quality is improved, meanwhile, the medium in the second filtering area can also be made to generate certain loosening by aeration, into And keep water flow in the second filtering area unobstructed to a certain extent；In the utility model, use solar panel 132 power generation for Aerator 130 provides power, makes full use of solar energy renewable energy advantage, saves operation cost, while installing battery additional 133 guarantee the operation steady in a long-term of facility.

It is aerobic treatment region to stream that the second filtering area of the utility model, which belongs to lower, which is equipped with and is driven by solar power generation Aerator 130 region is aerated, flow downstream into biological filter media layer 80 since the second aquifer 60, the layer Absorption, filtering, delay and the microorganism biological degradation for playing biological filter media reach removal COD, BOD₅、TN、TP The purpose of equal pollutants.It then flows through the second granule rock layers 91 and enters the second cobble rock layers 92, this layer of principal security has normal steady Fixed filtering rate and supporting role, the rainwater after being collected simultaneously filtration, purification enter this layer of inbuilt Permeable blind pipe 101, finally Drainage inspection well or receiving water body are converged by overflow well 102, complete the biofiltration detention period of whole device.Due to big portion Point particulate matter intercepted and removed after the filtering of the first cobble rock layers 31 in the first filtering area, the second filtering area of effective protection The blocking of biological filter media layer 80 substantially prolongs the replacement cycle of biological filter media, improves purification efficiency.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of classification biofiltration arresting device characterized by comprising

The bottom of pond of the delaying basin (10) of top end opening, the delaying basin (10) is equipped with dividing wall (20), the dividing wall vertically (20) for by the delaying basin (10) be divided into two it is independent for being filtered and biodegradable first mistake to rainwater Filter area, and for treated that rainwater filter again and biodegradable second filtering area by first filtering area；

It is successively laid with from the bottom to top along rainwater flow direction in first filtering area for containing in the rainwater to importing The first gravel layer (30) that particulate matter is filtered, for make by the filtered rainwater retention of first gravel layer (30) with So that first filtering area is formed the first aquifer (40) of stable hypoxic/anaerobic environment, is also buried in first filtering area Equipped with for the rainwater of purified treatment to be filtered to be imported to the inlet pipeline (50) in first gravel layer (30)；

It is from top to bottom successively laid with along rainwater flow direction for accumulating by first aquifer in second filtering area (40) overflow goes out the second aquifer (60) of rainwater, coating (70), for filtered by the coating (70) The biology that remaining particulate matter filters again and organic pollutant remaining in rainwater is adsorbed and degraded simultaneously in rainwater Filtering medium layer (80), for realizing the second of Quick drainage to by the biological filter media layer (80) treated rainwater Gravel layer (90), be embedded in second gravel layer (90) for by filtered rainwater conflux drain into drainage inspection well or by The discharge pipe line (100) received in water body.

2. classification biofiltration arresting device according to claim 1, which is characterized in that

First gravel layer (30) includes for cutting to the biggish big particle object of the partial size contained in the rainwater being introduced into The first cobble rock layers (31) for staying, the top for being laid in the first cobble rock layers (31) and for passing through first cobble The first of the lesser tiny particles content of partial size and the retention of remaining big particle object that contain in rainwater after rock layers (31) retention Granule rock layers (32)；

The porosity of the first cobble rock layers (31) is greater than the porosity of the first granule rock layers (32).

3. classification biofiltration arresting device according to claim 2, which is characterized in that

The inlet pipeline (50) includes the water inlet pipe (51) introduced rainwater in first filtering area, the water inlet pipe (51) More are connected with to be used for the water distribution branch pipe (52) in the first cobble rock layers (31) described in rainwater Decentralized Pull in；

The water distribution branch pipe (52) is embedded in the first cobble rock layers (31).

4. classification biofiltration arresting device according to claim 1, which is characterized in that

The classification biofiltration arresting device further includes for making rainwater or cleaning described first in first filtering area The draining emptying structure (110) that the trapped substance that filtering area generates discharges, the draining emptying structure (110) include:

It is laid in below first gravel layer (30) so that rainwater or trapped substance confluence are with the gutter (111) being discharged and institute State gutter (111) be connected to and for by the gutter (111) rainwater or trapped substance first filtering area is discharged Tapping pipe group (112).

5. classification biofiltration arresting device according to claim 4, which is characterized in that

The layer bottom surface of first gravel layer (30) is the inclined-plane being obliquely installed；

The gutter (111) is located at the lower position of the first gravel layer (30) layer bottom surface, and the gutter (111) Upper top surface is equipped with grid, and the gutter (111) is connected to by grid with the layer bottom surface of first gravel layer (30)；

The tapping pipe group (112) includes the blow-down pipe being connected to the gutter (111), is set to putting on the blow-down pipe Empty valve is sheathed on outside the blow valve and is vertically arranged valve sleeve, bottom end and the blow valve phase that earth's surface is stretched out on simultaneously top The emptying valve operating rod on the valve sleeve top is stretched out on company and top.

6. classification biofiltration arresting device according to claim 1, which is characterized in that

Successively spaced multiple empty slots in the width direction are offered on the dividing wall (20), are equipped with and are used at each empty slot In the adjustable weir plate (120) for adjusting accumulation rainwater water level height in first aquifer (40)；

The adjustable weir plate (120) is connected on the dividing wall (20), and with the link position of the dividing wall (20) in height It spends adjustable on direction.

7. classification biofiltration arresting device according to claim 1, which is characterized in that

Second gravel layer (90) includes successively being laid up and down along rainwater flow direction for by the biofiltration Dielectric layer (80) treated rainwater realizes the second granule rock layers (91) and the second cobble rock layers (92) of Quick drainage；

The porosity of the second granule rock layers (91) is less than the porosity of the second cobble rock layers (92), and described second is thin The porosity of gravel layer (91) is greater than the porosity of the biological filter media layer (80).

8. classification biofiltration arresting device according to claim 7, which is characterized in that

The discharge pipe line (100) includes being embedded in the second cobble rock layers (92) for penetrating into rainwater after retention to converge The Permeable blind pipe (101) of stream is coated on the Permeable blind pipe (101) outside for preventing particulate matter from entering the Permeable blind pipe (101) geotextiles, the horizontal main pipe (103) being connected with the Permeable blind pipe (101) are connected to and perpendicular with the horizontal main pipe (103) The overflow well (102) that is directly laid in second filtering area is connected to by rainwater and overflowing rain water with the overflow well (102) Drain into the drainpipe (104) of drainage inspection well or receiving water body.

9. classification biofiltration arresting device according to claim 8, which is characterized in that

Overflow port (1020) bottom end on overflow well (102) top is the water storage of the second filtering area away from the height at the top of coating Layer height, and overflow port (1020) top on the overflow well (102) top is lower than the height of the delaying basin (10) top end opening Degree；

The quantity of the Permeable blind pipe (101) is more, and for horizontal layout in the second cobble rock layers (92), more described Water blind pipe (101) is connected with the horizontal main pipe (103).

10. classification biofiltration arresting device according to claim 1, which is characterized in that

The classification biofiltration arresting device further includes the aerator for being passed through air into second filtering area (130), the aerator (130) includes:

It is set to the outer aerator (131) of the delaying basin (10), is connected with the aerator (131) to provide the sun of the energy Energy power generation plate (132) and battery (133) are connected with the aerator (131) air to be passed through in second filtering area Snorkel (134).