CN101892702B - Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof - Google Patents
Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof Download PDFInfo
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- CN101892702B CN101892702B CN2010102457371A CN201010245737A CN101892702B CN 101892702 B CN101892702 B CN 101892702B CN 2010102457371 A CN2010102457371 A CN 2010102457371A CN 201010245737 A CN201010245737 A CN 201010245737A CN 101892702 B CN101892702 B CN 101892702B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A20/108—Rainwater harvesting
Abstract
The invention provides an onsite processing process for discarding initial rainwater in a heavy rain without occupying area, belonging to the technical field of environmental engineering. The invention discloses an onsite processing device for the discarding initial rainwater in the heavy rain without occupying area, which comprises a water inlet mechanism, a soil covering layer, a mixed layer, a soil layer, a gravel layer, a fine sand layer, a foundation layer and a draining mechanism, wherein the soil covering layer, the mixed layer, the soil layer, the gravel layer, the fine sand layer and the foundation layer are arranged in sequence from top to bottom; and the water inlet mechanism is connected with the mixed layer; and the draining mechanism is connected with the gravel layer and the fine sand layer. By the invention, the discarded initial rainwater in the heavy rain can reach the grade I discharge standard of the Discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) and GB/T 18920-2002 reuse of recycling water for urban and water quality standard for urban miscellaneous water consumption, and the blockage problem of the groove processing system can be effectively prevented.
Description
Technical field
The present invention relates to a kind of devices and methods therefor of technical field of waste water processing, specifically a kind of Heavy Rainfall Process early-stage rainwater stream abandoning is processed and processing method on the spot without taking up an area.
Background technology
The at present a lot of cities of China are owing to the combined system reason, so that rainwater has entered sewage treatment pipeline, this subject matter wherein bringing is that the quantity of sand and mud in the sewage is very high, have a strong impact on the final processing of sewage plant sludge, and had serious abrasive action for plant equipment of aqueduct and mud etc.Simultaneously, propelling along with China's energy-saving and emission-reduction, requirement is carried out middle water reuse for what rainwater was tried one's best, and early-stage rainwater is owing to carried a large amount of silt and pollutant, process if mix with the later stage rainwater, then can have a strong impact on water reuse purpose in the rainwater wherein, and increase rainwater processing load.Therefore, be necessary very much early-stage rainwater shunted and throw aside, or process separately.
The Permeable stratum area in city, the increase such as roof, street, parking lot etc. makes suitable watershed be covered by fluid-tight hardened surface, therefore causes rain (snow) water directly to permeate the ground, and has increased the flow of rainwash.Simultaneously, urbanization has caused the decline of rainfall runoff water quality on the impact of Urban Hydrologic environment, its reason is that mainly urbanization is based on the purpose that rainfall runoff is drained as early as possible to the transformation of drainage system, the increase of rainfall runoff flow velocity and flow, so that runoff significantly increases the souring on roof, road surface, the polluter of city underlying surface deposition is dissolved by rainwater or carries the diffusion that pollutes; Because China's overwhelming majority sewerage system adopts combined system, rainfall runoff enters sewage network, has increased the load for the treatment of facility.If can realize the utilization of rainwater, the processing load of municipal sewage will be solved effectively.And wherein the most key be the efficient processing target of realizing municipal sewage initial Split-flow water, thereby can directly use after making the later stage rainwater-collecting, so then can effectively reduce the treating capacity of rainwater.
The use of rainwater also can be used as other water such as air conditioning cooling water, fire demand water, car washing water, flowers and plants pouring, landscape water, road cleaning etc. except can be used as lavatory, street wash water, purposes is wider.The research of China's Application of Urban Rain Water and application start from the eighties in 20th century, are developed the nineties." building and residential quarter rainwater utilization engineering legislation " implemented on April 1st, 2007 plays positive impetus to Application of Urban Rain Water.The processing procedure of rainwater is similar to general water treatment procedure at present, mainly adopts physico-chemical process.
Find through the literature search to prior art, (day for announcing: patent specification 2008.07.16) has disclosed following content: a kind of middle water reuse and rainwater sewage separation centralized processor are provided for CN101220603 for Chinese patent Granted publication number, comprise the coarse filtration sedimentation basin, the biochemical treatment tank that contains the sewage decomposing pool, the Buffer Pool that is communicated with coarse filtration sedimentation basin and biochemical treatment tank respectively and the fine filtering pond that contains movable filter bed that is communicated with Buffer Pool, middle water handling reclamation control room, middle water water storage pond, middle water handling reclamation has central operator in the control room, the ultra-filtration and separation machine that is communicated with the fine filtering pond of acceptor center control panel control, concentrated sewage well by pipeline respectively with biochemical treatment tank, the coarse filtration sedimentation basin, Buffer Pool, the fine filtering pond is communicated with.Both solve the shunting of sewage rainwater and focused on problem, obtained again recycled water.This patent technological process is longer, and needs the long time of staying.The technical problem to be solved in the present invention is: Heavy Rainfall Process early-stage rainwater stream abandoning sewage, its silt content is higher, and contains the complicated pollutant of Chuck Steak, water reuse standard in satisfying after this technique is disposed.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of Heavy Rainfall Process early-stage rainwater stream abandoning to process on the spot and processing method without taking up an area.The initial Split-flow rainwater is through entering the setting pot precipitation behind the flow abandoning apparatus, after enter the water intake mechanism water distribution, carry out the soil processing from flowing into the sewage purification soil ditch, pass through special construction, solve the soil method blockage problem of disposing of sewage, can make the initial stage throw aside rainwater and reach first discharge standard (GB18918-2002) in " urban wastewater treatment firm pollutant emission standard ", and can prevent effectively that the problem of stopping up occurs locking system.
The present invention realizes by following technical scheme:
The Heavy Rainfall Process early-stage rainwater stream abandoning that the present invention relates to is processed without taking up an area on the spot, comprise: water intake mechanism, overburden layer, mixed layer, soil horizon, gravel layer, fine sand layer, basal layer and drainage mechanism, wherein: overburden layer, mixed layer, soil horizon, gravel layer, fine sand layer and basal layer from top to bottom set gradually, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with gravel layer and fine sand layer.
Described water intake mechanism comprises: intake pool, several distribution channels, wherein: the intake pool outlet is connected with distribution channel, distribution channel is arranged in the mixed layer, rely on flow by gravity to enter in the groove early-stage rainwater, the distribution channel width is 200mm, it lays the quantity basis: calculate perpendicular transverse width, the transverse width of every 1.5m arranges a groove.
Described drainage mechanism comprises: collector pipe, tank, suction pump, and wherein: an end of collector pipe places gravel layer and fine sand layer, and the other end is connected with the tank of built-in suction pump; Suction pump is arranged in the tank.
The Heavy Rainfall Process early-stage rainwater stream abandoning that the present invention relates to may further comprise the steps without taking up an area on the spot processing method:
The first step in selected position, comprises the green belt on subdistrict greening district and road traffic next door, the excavation setting pot, and add more than the argillic horizon 0.6m bottom, and compacting.After water enters setting pot sand setting a period of time, remove part grains of sand material.
Second step, the setting pot water outlet enters on the spot treatment system of sewage, sewage treatment system on the spot wherein, comprise: water intake mechanism, overburden layer, mixed layer, soil horizon, gravel layer, fine sand layer, basal layer and drainage mechanism, wherein: overburden layer, mixed layer, soil horizon, gravel layer, fine sand layer and basal layer from top to bottom set gradually, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with gravel layer and fine sand layer.
The 3rd step, the position of selecting, the green belt that comprises subdistrict greening district and road traffic next door, the trench cell body, add more than the argillic horizon 0.6m bottom, and compacting, then lays successively up fine sand layer and gravel layer, and at bottom laying collector pipe, and collector pipe laid to the water outlet direction with 5 ‰ the gradient, and make it connect tank, suction pump is set in the tank is used for discharging and processes water;
Described groove body its degree of depth when not comprising overburden layer is 700-900mm, and area is 2.5Q-5Qm
2What wherein, Q was processes the water yield day take cubic meter as unit.
The 4th step, above the soil horizon of groove body with the mounting and fixing support of wooden grid as biologic packing material, then biologic packing material is suspended on the latticed fixed mount, make the biologic packing material vertical hanging and contact with the gravel layer of groove body in the lower end.
The 5th step, with the soil of excavation from top to bottom progressively in the impouring cell body, until soil add to can satisfy reach the soil horizon thickness of 450-500mm after the compacting after, the biologic packing material that is suspended on the fixed mount is cut along the soil plane, the grid fixed mount is removed, then tamp soil horizon, guarantee the rigidity of rainwater purification soil ditch structure.
The 6th step, lay mixed layer at soil horizon, and along the water inlet direction mixed layer is tilted to the sump direction by 5 ‰ the gradient, distribution channel is arranged on the mixed layer front end, utilizes mixed layer to system's uniform water distribution.Add overburden layer at mixed layer at last, overburden layer thickness also should remain on more than the 100mm, thereby can satisfy demand of plant growth.Early-stage rainwater is through sewage on the spot after the treatment system, qualified discharge.
In the step 4, described biologic packing material is that TPO and polyamide consist of, and structure is class test-tube brush hairbrush shape, and described biologic packing material design addition is determined in the following manner:
Soil permeability coefficient in soil horizon is less than 10
-6During cm/s, the biologic packing material loading density is that every cubic metre of soil evenly loads surface area and is no less than 40m
2Filler;
Soil permeability coefficient in soil horizon is 10
-5-10
-6During cm/s, the biologic packing material loading density is that evenly to load surface area be 20-40m to every cube of soil
2Filler;
Soil permeability coefficient in soil horizon is greater than 10
-5During cm/s, the biologic packing material loading density is that evenly to load surface area be 10-20m to every cubic metre of soil
2Filler.
Compared with the prior art, the present invention has following advantage: (1) need to not sneak into the media such as sandstone and iron filings adopting normal soil to do in the system of soil ditch medium in soil; (2) through after removing the pretreated early-stage rainwaters such as the grains of sand and entering this system, the system jams problem can not appear because of changes of soil properties, utilize the water guide performance of the commercially available brush shape biologic packing material of TPO and polyamide material formation, so that the permeability of soil improves greatly, break away from traditional soil ditch to the dependence of soil type selecting, enlarged the territorial scope that early-stage rainwater and sewage purification soil ditch use; (3) can bear larger hydraulic load, when hydraulic load during up to 20-40cm/d, initial stage rain sewage still can reach first discharge standard (GB18918-2002) and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality in " urban wastewater treatment firm pollutant emission standard " after processing through this system; (4) do not take floor area, keep the greening on ground and other, such as demands such as parking lots.
Description of drawings
Fig. 1 is process chart of the present invention;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the biologic packing material scheme of installation.
The specific embodiment
The below elaborates to embodiments of the invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
One, to the Heavy Rainfall Process early-stage rainwater stream abandoning without taking up an area the on the spot embodiment for the treatment of apparatus
As shown in Figure 1, present embodiment comprises: water intake mechanism, overburden layer 1, mixed layer 2, soil horizon 3, gravel layer 4, fine sand layer 5, basal layer 6 and drainage mechanism, wherein: overburden layer 1, mixed layer 2, soil horizon 3, gravel layer 4, fine sand layer 5 and basal layer 6 from top to bottom set gradually, water intake mechanism is connected with mixed layer 3, and drainage mechanism is connected with gravel layer 4 and fine sand layer 5.
Described water intake mechanism comprises: intake pool 7, several distribution channels 8, wherein: the intake pool outlet is connected with distribution channel, distribution channel is arranged in the mixed layer, rely on flow by gravity to enter in the groove early-stage rainwater, the distribution channel width is 200mm, it lays quantity: calculate perpendicular transverse width, the transverse width of every 1.5m arranges a groove.
Described drainage mechanism comprises: collector pipe 9, tank 10, suction pump 11, and wherein: an end of collector pipe places gravel layer and fine sand layer, and the other end is connected with the tank of built-in suction pump; Suction pump is arranged in the tank.
Described overburden layer 1 comprises: surface sealing layer or vegetable layer, and overburden layer thickness also should remain on more than the 100mm;
Described mixed layer 2 is that 1: 1 gravel and coarse sand mixes by volume ratio, and its thickness is 100-150mm, wherein: grain size of gravel 6-10mm, coarse sand diameter 0.5-2.0mm;
Described soil horizon 3 thickness are 350-500mm, are made of the soil that excavates out and biologic packing material;
Described gravel layer 4 thickness are 50-100mm, are made of the gravel of 6-10mm
Described fine sand layer 5 thickness are 100-150mm, are made of the fine sand of 0.5-1.0mm;
Described basal layer 6 is argillic horizon, and thickness＞0.6mm is as the basic supporting layer of technique disposal.
As shown in Figure 2, the installation process of biologic packing material needs latticed fixed mount A in the soil horizon, is mainly used in the soil ditch building process edaphic biologic packing material being fixed.Biologic packing material B is suspended on the fixed mount, and soil is inserted by the space in fixed mount and the biologic packing material.When soil add to reach the soil horizon thickness of 450-500mm after can satisfying compacting after, biologic packing material is separated with fixed mount, remove fixed mount, biologic packing material relies on the interior friction of soil to be fixed in the soil horizon.
Be illustrated in figure 3 as edaphic work schematic diagram, biologic packing material plays water guiding action, has increased vertical water permeability of soil so that effluent stream to be mainly vertical gravity current, increase soil permeability, thereby avoided that blockage problem occurs in the disposal process.
Two, following examples are without taking up an area the on the spot performance of processing method to the Heavy Rainfall Process early-stage rainwater stream abandoning
Embodiment 1
Getting Chongming County of Shanghai residential quarter inner penetration coefficient is 6.2 * 10
-4The soil of cm/s, making up one is 10m by filling surface area in every cubic metre of soil
2The rainwater purification soil ditch of biologic packing material, the gash depth when not comprising overburden layer is 700mm, and the degree of depth of groove is 800mm behind the earthing, and area is 2.0m
2, it is 0.3-0.9m that the water yield is processed in design
3/ d, namely hydraulic load is 15-45cm/d.Build simultaneously the soil ditch for purifying of a formed objects that does not have a biologic packing material as a comparison.The artificial distribution tests in the experimental rig of batching.
Influent COD
CrFor 50.4-180.6mg/L, SS are that 18-52mg/L, total phosphorus are that 1.9-2.7mg/L, ammonia nitrogen are that 13.4-38.7mg/L, pH are 5.8-6.5, batch in the experimental rig with the hydraulic load of 40cm/d, through behind the device, the COD of water outlet
CrBe 11.1-27.8mg/L, SS is 5.5-7.1mg/L, and total phosphorus is 0.05-0.06mg/L, and ammonia nitrogen is 4.5-5.1mg/L, and outlet effect has reached municipal sewage plant's one-level A standard and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality.
Embodiment 2
Getting certain university campus inner penetration coefficient is 2.9 * 10
-7The soil of cm/s, making up one is 20m by filling surface area in every cubic metre of soil
2The early-stage rainwater stream abandoning process for purifying of biologic packing material.Gash depth when not comprising overburden layer is 700mm, and the degree of depth of groove is 800mm behind the earthing, and area is 2m
2, it is 0.4-0.8m that the water yield is processed in design
3/ d, namely hydraulic load is 20-40cm/d.Build simultaneously the soil ditch for purifying domestic wastewater of a same size that does not have a biologic packing material as a comparison.The early-stage rainwater of simulated roadway is tested in the experimental rig of batching.
Water inlet simulated roadway runoff: COD is 186-312mg/L, SS is 25-106mg/L, total phosphorus is 0.4-1.3mg/L, ammonia nitrogen is 1.6-4.9mg/L, total nitrogen is 2.3-7.4mg/L, and pH is 5.3-6.5, batches in two soil ditch with the hydraulic load of 40cm/d, after the soil ditch processing of having loaded biologic packing material, the COD of water outlet
CrBe 18.2-32.8mg/L, SS is 3.2-6.3mg/L, total phosphorus is 0.03-0.11mg/L, ammonia nitrogen is 7.6-9.7mg/L, total nitrogen is 15.6-18.5mg/L, water outlet has reached municipal sewage plant's one-level B standard and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality, and blockage problem does not appear in 3 years ' operation continuously.And through after the soil ditch processing of not loading biologic packing material, although can reach identical wastewater purifying efficiency, namely stop up, occur the problem that sewage can not ooze down after 16 days.
Claims (3)
1. a Heavy Rainfall Process early-stage rainwater stream abandoning is characterized in that without the processing method of taking up an area on the spot, may further comprise the steps:
The first step, in selected position, comprise the green belt on subdistrict greening district and road traffic next door, the excavation setting pot, add more than the argillic horizon 0.6m bottom, and compacting, after water enters setting pot sand setting a period of time, removes part grains of sand material;
Second step, setting pot water outlet enter sewage, and overburden layer, mixed layer, soil horizon, gravel layer, fine sand layer and the basal layer for the treatment of apparatus from top to bottom set gradually on the spot, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with gravel layer and fine sand layer;
The 3rd step, the position of selecting, the green belt that comprises subdistrict greening district and road traffic next door, the trench cell body, add more than the argillic horizon 0.6m bottom, and compacting, then lays successively up fine sand layer and gravel layer, and at bottom laying collector pipe, and collector pipe laid to the water outlet direction with 5 ‰ the gradient, and make it connect tank, suction pump is set in the tank is used for discharging and processes water;
The 4th the step, above the soil horizon of groove body with the mounting and fixing support of wooden grid as biologic packing material, then biologic packing material is suspended on the latticed fixed mount, make the biologic packing material vertical hanging and contact with the gravel layer of groove body in the lower end, the structure of biologic packing material is TPO and the polyamide of class test-tube brush hairbrush shape;
The 5th step, with the soil of excavation from top to bottom progressively in the impouring cell body, until soil add to can satisfy reach the soil horizon thickness of 450-500mm after the compacting after, the biologic packing material that is suspended on the fixed mount is cut along the soil plane, the grid fixed mount is removed, then tamp soil horizon, guarantee the rigidity of rainwater purification soil ditch structure;
The 6th the step, lay mixed layer at soil horizon, and along the water inlet direction mixed layer is tilted to the sump direction by 5 ‰ the gradient, distribution channel is arranged on the mixed layer front end, utilize mixed layer to system's uniform water distribution, add overburden layer at mixed layer at last, overburden layer thickness also should remain on more than the 100mm, thereby can satisfy demand of plant growth, early-stage rainwater is through sewage on the spot after the treatment system, qualified discharge.
2. Heavy Rainfall Process early-stage rainwater stream abandoning according to claim 1 is characterized in that without the processing method of taking up an area on the spot, and in the step 4, the addition of described biologic packing material is determined in the following manner:
Soil permeability coefficient in soil horizon is less than 10
-6During cm/s, the biologic packing material loading density is that every cubic metre of soil evenly loads surface area and is no less than 40m
2Filler;
Soil permeability coefficient in soil horizon is 10
-5-10
-6During cm/s, the biologic packing material loading density is that evenly to load surface area be 20-40m to every cube of soil
2Filler;
Soil permeability coefficient in soil horizon is greater than 10
-5During cm/s, the biologic packing material loading density is that evenly to load surface area be 10-20m to every cubic metre of soil
2Filler.
3. Heavy Rainfall Process early-stage rainwater stream abandoning according to claim 1 is characterized in that without the processing method of taking up an area on the spot, and the groove body degree of depth described in the 3rd step is 700-900mm, and area is 2.5Q-5Qm
2, wherein, Q processes the water yield for the day take cubic meter as unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102457371A CN101892702B (en) | 2010-08-05 | 2010-08-05 | Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof |
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| CN2010102457371A CN101892702B (en) | 2010-08-05 | 2010-08-05 | Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof |
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| CN101892702B true CN101892702B (en) | 2013-01-16 |
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| CN102296690B (en) * | 2011-06-21 | 2013-09-11 | 中国建筑设计研究院 | System and method for utilizing rainwater in villages and towns |
| CN103011532B (en) * | 2013-01-10 | 2013-11-06 | 中国地质大学（武汉） | Geological material-based rainwater quality treatment system |
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| CN103967105A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Housing cluster rainwater ecological drain-off system |
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| CN106638918B (en) * | 2016-12-02 | 2019-12-20 | 宁波顺行园林建设有限公司 | Construction method of sponge urban rainwater collection system |
| CN107268712B (en) * | 2017-05-26 | 2021-04-06 | 中国建筑设计研究院有限公司 | Rainwater collecting and utilizing system |
| CN117005511B (en) * | 2023-08-15 | 2024-02-09 | 安徽微垦智水环境科技有限公司 | Overground solid fiber ecological water storage device and overground solid fiber ecological water storage method |
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