CN108083426A - A kind of rapid infiltration system for initial rainwater efficient process - Google Patents

A kind of rapid infiltration system for initial rainwater efficient process Download PDF

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Publication number
CN108083426A
CN108083426A CN201711387933.0A CN201711387933A CN108083426A CN 108083426 A CN108083426 A CN 108083426A CN 201711387933 A CN201711387933 A CN 201711387933A CN 108083426 A CN108083426 A CN 108083426A
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China
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packing layer
initial rainwater
layer
water
water outlet
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Inventor
袁宏林
张颖
于东升
田东昊
吴亚东
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN201711387933.0A priority Critical patent/CN108083426A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C02F3/107—Inorganic materials, e.g. sand, silicates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001—Runoff or storm water
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a kind of rapid infiltration system for initial rainwater efficient process, including pretreatment system and filtration system；Pretreatment system includes the grid pond connected with pipeline and storage pond；Filtration system includes continuous filter, and continuous filter is connected by pipeline with storage pond, and several packing layers are provided in continuous filter.The configuration of the present invention is simple by distributing rationally for composite filling, greatly improves removal ability of the system to each pollutant in initial rainwater, comprehensive cost is low, convenient operation and management.

Description

A kind of rapid infiltration system for initial rainwater efficient process
Technical field
The invention belongs to water prevention and cure of pollution fields, and in particular to a kind of quick diafiltration system for initial rainwater efficient process System.
Background technology
With the increasing of urban construction density and activity intensity, city surface source pollution degree constantly increases, area source pollutants In containing more SS, organic matter, nitrogen, phosphorus, heavy metal etc., with the generation of catchment, wet deposition and rainwater are to underlying surface Wash away and city surface source pollution object can be all loaded into runoff rainwater, many report displays, SS, organic matter in initial rainwater, Total nitrogen, ammonia nitrogen, total phosphorus, heavy metal etc. are almost close to the index of municipal sewage.Under rain sewage diversion system, rainwater and sewage difference Using rain, dirty two sets pipe network systems collections, effectively prevent combined piping network overflow sewage and enter urban water-body, while but also Pollutant in rainwash rainwater fully enters water body, still results in water pollution aggravation.It is dirty that runoff rainwater carries these Dye object, which enters environment, has become water body by contaminated main path, has caused people's extensive concern.
In recent years, it is many on rainwater treatment and the research that utilizes, with reference to sponge urban construction to runoff total amount of pollutants discharge control The requirement of system develops Rain Garden, grass planting ditch, concave herbaceous field of diversified forms etc.；It is also adopted for rainwater pollution processing The manually techniques such as wetland, artificial continuous filter, coagulation/precipitation/filtration.On the whole, the treatment effeciency of existing treatment technology It is relatively low, limited to the reduction ability of different type pollutant.
The pollutant type and quantity contained in runoff rainwater especially initial rainwater is more, is united according to analysis and data Meter, in initial rainwater COD, total nitrogen, ammonia nitrogen, the concentration of total phosphorus can respectively reach 200~400mg/L, 15~40mg/L, 10~ 20mg/L, 1~4mg/L are nearly identical to municipal sewage water quality；And the heavy metal contained mainly includes the members such as lead, copper, zinc, cadmium Element, levels are considerably beyond soil and water body background concentration several times or even dozens of times.Rain Garden, grass planting ditch, up concave type The nature processing mode such as greenery patches is bound to cause pollutant accumulation in soil and groundwater, and there are Soil Environmental Pollution hidden danger；Other The operational management of artificial-strengthening processing mode again it is relative complex.Therefore, develop a kind of reduced investment, run conveniently, to all kinds of pollutions Object processing capacity and all preferable initial rainwater treatment technology of effect are particularly urgent.In contrast, it is of the prior art manually to ooze Filter tank is particularly suited for initial rainwater processing, includes filtering, absorption, biodegradation etc. to the processing effect of pollutant, synchronous SS, organic matter, nitrogen, phosphorus, heavy metal etc. is cut down to be likely to, still, height, filler classification, material compatibility of packing layer etc. It is the key factor for influencing all kinds of pollutant process effects.
The content of the invention
It is above-mentioned to solve it is an object of the invention to provide a kind of rapid infiltration system for initial rainwater efficient process .The present invention is easy to operate, and management is simple, and purification efficiency is high.
In order to achieve the above object, the present invention uses following technical scheme：
A kind of rapid infiltration system for initial rainwater efficient process, including：Pretreatment system and filtration system.
Pretreatment system, the pretreatment system include the grid pond connected with pipeline and storage pond；
Filtration system, the filtration system include continuous filter, and the continuous filter is connected by pipeline with storage pond, described Composite filling layer is provided in continuous filter.
Further, the composite filling layer in the continuous filter is four layers, is followed successively by packing layer, middle filler from top to bottom Layer, lower packing layer and bottom packing layer；The upper packing layer uses volume ratio as 1:2 river sand and lime stone composite filling, river sand Grain size is 0.7~1.2mm, and limestone particle size is 0.88~1.5mm；The middle packing layer uses volume ratio as 1:1:3 lime Stone, zeolite and slag composite filling, limestone particle size be 0.88~1.5mm, sized zeolite particles be 0.88~1.3mm, slag grain size For 1~1.5mm；The lower packing layer uses volume ratio as 4:1 flyash and wooden chaff composite filling, flyash grain size are 0.8 ~1.5mm, wooden chaff grain size are 1.0~2.5mm；The bottom packing layer is filled using cobblestone, and cobblestone grain size is 15~25mm.
Further, the height ratio of upper packing layer, middle packing layer, lower packing layer and bottom packing layer is：6:5:5:3.
Further, the minimum constructive height of upper packing layer, middle packing layer, lower packing layer and bottom packing layer is respectively：0.6m、 0.5m、0.5m、0.3m。
Further, Sand pump is further included in storage pond；It is set on pipeline between the storage pond and the continuous filter There is elevator pump.
Further, the filtration system use intermittent loading mode, daily water distribution twice, wet-dry ratio 1:3, the cycle For 12h, hydraulic load 2m3/m2·d。
Further, filtration system further includes filler surface layer, and filler surface layer bedding is in the upper filler of the continuous filter The upper surface of layer, the filler surface layer are pebble layer, and the surface of the pebble layer is provided with perforation water distribution pipe, cloth of perforating The entrance connection storage pond of waterpipe and the water outlet of elevator pump；The bottom of the continuous filter is provided with collecting conduit.
Further, the filler surface layer is pebble layer, and cobblestone grain size is 10~15mm, highly at least 0.1~ 0.2m。
Further, the collecting conduit of continuous filter bottom is provided with water outlet and outlet pipe, and the nozzle of outlet pipe, which is higher by, to be oozed The bottom in filter tank at least 60cm.
Further, the rapid infiltration system for initial rainwater processing, to the removal rate of COD for 88.5%~ 96.9%, water outlet COD are less than 34.5mg/L；Removal rate to TN is 78.8%~94.7%, and water outlet TN is less than 3.3mg/L；It is right The removal rate of NH3-N is 75.5%~94.5%, and water outlet NH3-N is less than 1.8mg/L；To the removal rate of TP for 77.4%~ 90.3%, water outlet TP are less than 0.25mg/L；Removal rate to Pb is 95.51%~99.23%, and water outlet Pb is less than 3.88ug/L； Removal rate to Cu is 93.5%~98.85%, and water outlet Cu is less than 5.82ug/L；To the removal rate of Zn for 91.51%~ 97.68%, water outlet Zn are less than 10.83ug/L；Removal rate to Cd is 95.71%~99.43%, and water outlet Cd is less than 2.33ug/ L。
Compared with prior art, the invention has the advantages that：
The rapid infiltration system for initial rainwater efficient process of the present invention, for different pollution species in initial rainwater Class, quantity and morphological feature filter out a variety of filler materials, by various types of filler according to rational combination and proportioning filling shape Into the packing layer of continuous filter, during being percolated to initial rainwater, collaboration plays filtering and suction-operated；It is meanwhile logical It crosses certain dry/wet alternate periodical duty and builds rational aerobic/anoxic biological treatment environmental condition, give full play to Biodegradation realizes and the synchronous high-efficiency of SS, COD in initial rainwater, total nitrogen, ammonia nitrogen, total phosphorus, heavy metal is removed. Effluent quality COD reaches《Water environment quality standard》(GB3838-2002) V class water standard, TN are far superior to level-one A Water quality index, TP reaches《Water environment quality standard》(GB3838-2002) IV class water standard, NH3-N reach《Earth's surface Quality standard of water environment》(GB3838-2002) V class water standard, Pb reach《Water environment quality standard》(GB3838- 2002) I class water standard, Cu reach《Water environment quality standard》(GB3838-2002) I class water standard, Zn reach《Ground Table quality standard of water environment》(GB3838-2002) I class water standard, Cd reach《Water environment quality standard》(GB3838- 2002) II class water standard.
The quick diafiltration system for initial rainwater efficient process of the present invention, suitable for initial rainwater processing, simple in structure, Operation is easy, comprehensive cost is low.Wherein, grid pond can remove the floating material in initial rainwater and larger suspended matter；Storage pond leads to It crosses precipitation and can remove silt particle and partial suspended thing in initial rainwater, can also adjust water quantity exchange water quality, keep follow-up filtration system The stability of water inlet；Continuous filter is anti-by the biochemistry of the retention filtering of composite filling, absorption and the microorganism wherein cultivated It should wait multiple actions that can synchronize purified treatment to the organic pollution in rainwater and heavy metal contaminants.
Further, the filler added in several packing layers also wraps in addition to including conventional river sand, lime stone and zeolite Include the particular fillers such as slag, flyash and wooden chaff.Wherein, lime stone for Pb, Zn heavy metal ion Adsorption ability compared with Good, zeolite is preferable for the Adsorption effect of ammonia nitrogen and Pb, Cu, Cd heavy metal ion, and the metallic element contained in slag is easy It reacts in phosphate anion, for dephosphorization；Flyash has larger specific surface area, to phosphorus and Pb, Cu heavy metal from Son has good adsorption effect, and wooden chaff can provide carbon source for denitrification, enhance the biological denitrificaion ability of system.
Further, in storage pond precipitation silt particle, removed using Sand pump, it can be achieved that in storage pond space lasting profit With preventing the blocking of continuous filter.
Further, the filler layer surface of continuous filter is equipped with pebble layer, can prevent from washing away filling out in packing layer into water Material.
Further, the method for operation of periodical dry/wet alternate, can be achieved natural reaeration during denidation, be packed bed Aerobic, anoxic, the multiple-microorganism living environment of anaerobism are inside built, microbial population variation is advantageously implemented, so as to increase The ability of strong denitrogenation dephosphorizing.
Further, effluent pipe mouth will be higher by the bottom at least 60cm of continuous filter, make continuous filter lower part 60cm depth always It in waterflooding state to keep anaerobic environment, intensified anti-nitrated can act on, enhance biological denitrificaion ability.
The present invention is by many experiments, for different pollutant kinds, quantity and form in initial rainwater, according to water process Basic principle filters out a variety of filler materials, and various types of filler is loaded on artificial continuous filter according to rational combination and proportioning In, while collaboration plays filtering and suction-operated, given full play to by certain dry/wet alternate periodical duty Biological treatment acts on, and realizes the efficient removal to COD, total nitrogen, ammonia nitrogen, total phosphorus, heavy metal in initial rainwater, forms one kind For the rapid infiltration system of initial rainwater efficient process.
Description of the drawings
Fig. 1 is a kind of system structure diagram of rapid infiltration system for initial rainwater efficient process of the present invention；
Fig. 2 is the structure diagram of the continuous filter in Fig. 1；
Fig. 3 is system Inlet and outlet water COD variation diagrams in the embodiment of the present invention；
Fig. 4 is system Inlet and outlet water TN variation diagrams in the embodiment of the present invention；
Fig. 5 is system Inlet and outlet water NH in the embodiment of the present invention3- N variation diagrams；
Fig. 6 is system Inlet and outlet water TP variation diagrams in the embodiment of the present invention；
Fig. 7 is system Inlet and outlet water Pb variation diagrams in the embodiment of the present invention；
Fig. 8 is system Inlet and outlet water Cu variation diagrams in the embodiment of the present invention；
Fig. 9 is system Inlet and outlet water Zn variation diagrams in the embodiment of the present invention；
Figure 10 is system Inlet and outlet water Cd variation diagrams in the embodiment of the present invention.
Wherein：1 grid pond；2 storage ponds；3 continuous filters；4 Sand pumps；5 elevator pumps；6 water distribution pipes；7 packing layers；On 701 Packing layer；Packing layer in 702；703 times packing layers；704 bottom packing layers；8 collecting conduits；9 filler surface layers.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
With reference to figure 1 and Fig. 2, the present invention provides a kind of rapid infiltration system for initial rainwater efficient process, including：In advance Processing system and filtration system；Pretreatment system includes the grid pond 1 being sequentially communicated with pipeline and storage pond 2；Filtration system bag Continuous filter 3 is included, continuous filter 3 is connected by pipeline with the outlet of storage pond 2, and several packing layers 7 are provided in continuous filter 3.Lattice Grid pond 1 is used to remove the suspended matter in water body；Storage pond 2 removes silt particle and suspended matter and regulating water quality water in water removal for precipitating Amount, to keep the stability of rear end filtration system water inlet；Continuous filter 3 is used for the purified treatment of pollutant in initial rainwater.
Further include Sand pump 4 and elevator pump 5；Sand pump 4 removes the silt particle settled in storage pond 2, to ensure storage pond Space sustainable utilization and prevent continuous filter from blocking；The water outlet of storage pond 2 is connected with the water inlet of continuous filter 3 by pipeline It is logical, elevator pump 5 is may be provided on pipeline；The filler surface layer 9 of continuous filter 3 is equipped with the pebble layer of 0.1~0.2m of thickness, goose ovum The surface of rock layers is provided with perforation water distribution pipe 6；Water distribution pipe 6 connects the water outlet of storage pond 2 by pipeline.Continuous filter 3 Bottom is provided with collecting conduit 8；Collecting conduit 8 in continuous filter 3 is provided with water outlet, and water outlet is higher by the bottom of continuous filter 3 60cm。
The present invention the course of work be：Initial rainwater is introduced into pretreatment system, by grid pond 1 remove floating material and compared with Big suspended matter；The adjusting of precipitation process and water quality and quantity is carried out into storage pond 2 afterwards, continuous filter 3 is finally entered and carries out water quality Purification, the filler layer structure of continuous filter are divided into four layers from top to bottom, and the features such as each layer filler materials, configuration requirement, floor height are such as Under：
Upper strata filler 701：Volume ratio is used as 1:2 river sand and lime stone composite filling, river sand grain size takes 0.7~ 1.2mm, limestone particle size take 0.88~1.5mm, bed stuffing height：0.6m；
Middle filler 702：Volume ratio is used as 1:1:3 lime stone, zeolite and slag composite filling, limestone particle size take 0.88~1.5mm, sized zeolite particles take 0.88~1.3mm, and slag grain size takes 1~1.5mm, bed stuffing height：0.5m；
Lower floor's filler 703：Volume ratio is used as 4:1 flyash and wooden chaff composite filling, flyash grain size takes 0.8~ 1.5mm, bed stuffing height：0.5m；
Underfilling 704：It is filled using cobblestone, grain size takes 15~25mm, height：0.3m.
On upper strata, there is a filler surface layer 9 on the surface of filler 701, and filler surface layer is pebble layer, cobblestone grain size for 10~ 15mm, height：0.1~0.2m.
Operating parameter is as follows：Using intermittent loading mode, daily water distribution twice, wet-dry ratio 1:3, cycle 12h, water Power load is 2m3/m2·d。
Embodiment：
Embodiment carries out experimental study, by detecting for a long time, Yixing City city for the processing of Yixing City city initial rainwater Initial rainwater water quality situation is shown in Table 1, and embodiment is using the artificial distribution for simulating Yixing City city initial rainwater water quality index Processing experiment is carried out for raw water, has carried out the Contrast on effect of the present invention and conventional composite filling filtration process.
1 Yixing City city initial rainwater water quality index of table
The packing layer of the present invention is followed successively by from top to down as II group：
Upper strata filler：Volume ratio is used as 1:2 river sand and lime stone composite filling, river sand grain size take 0.7~1.2mm, Limestone particle size takes 0.88~1.5mm, bed stuffing height：0.6m；
Middle filler：Volume ratio is used as 1:1:3 lime stone, zeolite and slag composite filling, limestone particle size take 0.88~1.5mm, sized zeolite particles take 0.88~1.3mm, and slag grain size takes 1~1.5mm, bed stuffing height：0.5m；
Lower floor's filler：Volume ratio is used as 4:1 flyash and wooden chaff composite filling, flyash grain size takes 0.8~ 1.5mm, bed stuffing height：0.5m；
Underfilling：It is filled using cobblestone, grain size takes 15~25mm, is highly 0.3m.
Filler surface layer：The surface bedding pebble layer of filler on upper strata, cobblestone grain size are 10~15mm, highly：0.2m.
I group of control group uses traditional filler layer structure, and I group and II group of filler layer structure are shown in Table 2.
Packing layer composition contrast table during table 2 is tested
The main design parameters of the system：Using intermittent loading mode, daily water distribution twice, wet-dry ratio 1:3, the cycle For 12h, hydraulic load 2m3/m2·d。
The horizontal polluting property with initial rainwater of pollutant concentration for testing water distribution approaches, and water distribution is into quick diafiltration System, the water outlet after the purification of composite filling.
Rapid infiltration system stable operation stage, to COD, TN, NH in simulation initial rainwater3-N、TP、Pb、Cu、Zn、Cd Removal effect see the table below 3, table 4, table 5, table 6, table 7, table 8, table 9, table 10 respectively.
The Inlet and outlet water COD of 3. liang of system systems of table compares
The Inlet and outlet water TN of 4. liang of system systems of table compares
The Inlet and outlet water NH of 5. liang of system systems of table3- N compares
The Inlet and outlet water TP of 6. liang of system systems of table compares
The Inlet and outlet water Pb of 7. liang of system systems of table compares
The Inlet and outlet water Cu of 8. liang of system systems of table compares
The Inlet and outlet water Zn of 9. liang of system systems of table compares
The Inlet and outlet water Cd of 10. liang of system systems of table compares
It can be seen from the above result that II group of removal rate to COD of filler combination of the present invention is 88.5%~96.9%, water outlet COD is less than 34.5mg/L；Removal rate to TN is 78.8%~94.7%, and water outlet TN is less than 3.3mg/L；Removal to NH3-N Rate is 75.5%~94.5%, and water outlet NH3-N is less than 1.8mg/L；Removal rate to TP is 77.4%~90.3%, and water outlet TP is low In 0.25mg/L；Removal rate to Pb is 95.51%~99.23%, and water outlet Pb is less than 3.88ug/L；Removal rate to Cu is 93.5%~98.85%, water outlet Cu are less than 5.82ug/L；Removal rate to Zn is 91.51%~97.68%, and water outlet Zn is less than 10.83ug/L；Removal rate to Cd is 95.71%~99.43%, and water outlet Cd is less than 2.33ug/L.
Compared with the conventional filler of lime stone, zeolite and river sand, novel compositions filler of the present invention to COD, TN, NH3-N and The removal effect of TP is substantially strengthened, and effluent quality COD reaches《Water environment quality standard》(GB3838-2002) V class water quality Standard, TN are far superior to the water quality index of level-one A, and TP reaches《Water environment quality standard》(GB3838-2002) IV class water Matter standard, NH3-N reach《Water environment quality standard》(GB3838-2002) V class water standard, Pb reach《Earth's surface water ring Border quality standard》(GB3838-2002) I class water standard, Cu reach《Water environment quality standard》(GB3838-2002)Ⅰ Class water standard, Zn reach《Water environment quality standard》(GB3838-2002) I class water standard, Cd reach《Earth's surface water ring Border quality standard》(GB3838-2002) II class water standard.

Claims (10)

1. a kind of rapid infiltration system for initial rainwater efficient process, which is characterized in that including：Pretreatment system and diafiltration System；
Pretreatment system, the pretreatment system include the grid pond (1) connected with pipeline and storage pond (2)；
Filtration system, the filtration system include continuous filter (3), and the continuous filter (3) is connected by pipeline with storage pond (2) It is logical, it is provided with packing layer (7) in the continuous filter (3).
2. the rapid infiltration system according to claim 1 for initial rainwater efficient process, which is characterized in that described to ooze Packing layer (7) in filter tank (3) is four layers, is followed successively by packing layer (701), middle packing layer (702), lower packing layer from top to bottom (703) and bottom packing layer (704)；
The upper packing layer (701) uses volume ratio as 1:2 river sand and lime stone composite filling, river sand grain size for 0.7~ 1.2mm, limestone particle size are 0.88~1.5mm；
The middle packing layer (702) uses volume ratio as 1:1:3 lime stone, zeolite and slag composite filling, limestone particle size For 0.88~1.5mm, sized zeolite particles are 0.88~1.3mm, and slag grain size is 1~1.5mm；
The lower packing layer (703) uses volume ratio as 4:1 flyash and wooden chaff composite filling, flyash grain size for 0.8~ 1.5mm, wooden chaff grain size are 1.0~2.5mm；
The bottom packing layer (704) is filled using cobblestone, and cobblestone grain size is 15~25mm.
3. the rapid infiltration system according to claim 2 for initial rainwater efficient process, which is characterized in that upper filler Layer (701), middle packing layer (702), the height ratio of lower packing layer (703) and bottom packing layer (704) are：6:5:5:3.
4. the rapid infiltration system according to claim 2 for initial rainwater efficient process, which is characterized in that upper filler Layer (701), middle packing layer (702), the minimum constructive height of lower packing layer (703) and bottom packing layer (704) are respectively：0.6m、0.5m、 0.5m、0.3m。
5. the rapid infiltration system according to claim 1 for initial rainwater efficient process, which is characterized in that regulating and storing Sand pump (4) is set in pond (2)；
Elevator pump is provided on pipeline between the storage pond (2) and the continuous filter (3)；
The grid pond (1) is embedded in storage pond (2).
6. the rapid infiltration system according to claim 1 for initial rainwater efficient process, which is characterized in that described to ooze Filter system use intermittent loading mode, daily water distribution twice, wet-dry ratio 1:3, cycle 12h, hydraulic load 2m3/m2· d。
7. the rapid infiltration system according to claim 1 for initial rainwater efficient process, which is characterized in that further include Filler surface layer (9), filler surface layer (9) bedding is on the top of the packing layer (7) of the continuous filter (3), the filler surface layer (9) it is pebble layer, cobblestone grain size is 10~15mm, and the surface on the filler surface layer is provided with perforation water distribution pipe (6), wears The water outlet of the entrance connection storage pond (2) of hole water distribution pipe (6)；The bottom of the continuous filter (3) is provided with collecting conduit (8)。
8. the rapid infiltration system according to claim 7 for initial rainwater efficient process, which is characterized in that described to fill out The height of material surface layer (9) is at least 0.1~0.2m.
9. the rapid infiltration system according to claim 2 for initial rainwater efficient process, which is characterized in that continuous filter (3) collecting conduit (8) in is provided with water outlet and outlet pipe, and the nozzle of outlet pipe is higher by the bottom of continuous filter (3) at least 60cm。
10. the rapid infiltration system according to claim 2 for initial rainwater processing, which is characterized in that described to be used for The rapid infiltration system of initial rainwater processing, the removal rate to COD are 88.5%~96.9%, and water outlet COD is less than 34.5mg/L； Removal rate to TN is 78.8%~94.7%, and water outlet TN is less than 3.3mg/L；To the removal rate of NH3-N for 75.5%~ 94.5%, water outlet NH3-N are less than 1.8mg/L；Removal rate to TP is 77.4%~90.3%, and water outlet TP is less than 0.25mg/L； Removal rate to Pb is 95.51%~99.23%, and water outlet Pb is less than 3.88ug/L；To the removal rate of Cu for 93.5%~ 98.85%, water outlet Cu are less than 5.82ug/L；Removal rate to Zn is 91.51%~97.68%, and water outlet Zn is less than 10.83ug/ L；Removal rate to Cd is 95.71%~99.43%, and water outlet Cd is less than 2.33ug/L.
CN201711387933.0A 2017-12-20 2017-12-20 A kind of rapid infiltration system for initial rainwater efficient process Pending CN108083426A (en)

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