CN108996757A - Rain water on roof recovery processing technique - Google Patents

Rain water on roof recovery processing technique Download PDF

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Publication number
CN108996757A
CN108996757A CN201810962833.4A CN201810962833A CN108996757A CN 108996757 A CN108996757 A CN 108996757A CN 201810962833 A CN201810962833 A CN 201810962833A CN 108996757 A CN108996757 A CN 108996757A
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CN
China
Prior art keywords
rainwater
recovery processing
processing technique
abandoned stream
roof
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201810962833.4A
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Chinese (zh)
Inventor
陈琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Futeni Water Engineering Co Ltd
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Suzhou Futeni Water Engineering Co Ltd
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Priority to CN201810962833.4A priority Critical patent/CN108996757A/en
Publication of CN108996757A publication Critical patent/CN108996757A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The invention discloses a kind of rain water on roof recovery processing techniques, it includes the following steps: to collect rain water on roof, carry out rain early-stage split-flow, rainwater remaining after abandoned stream is mixed with aluminium polychloride and carries out coagulating, it is filtered after precipitation process, filtered rainwater is mixed with disinfection sanitizer and carries out sterilizing processing；Wherein, the disinfection sanitizer is organic chloride aluminium ECH-98.Recovery processing technique of the invention can carry out removal of impurities and degerming to rain water on roof well, and treated, and rainwater can be used for the reclaimed waters such as green area irrigation, road cleaning, carwash.Meanwhile recovery processing technique of the invention can be carried out continuously water process, be discharged, process flow is simple, and cost is relatively low for Construction and operation, can be realized automation, manage and maintain it is at low cost, have fabulous application prospect and environment-friendly advantage.

Description

Rain water on roof recovery processing technique
Technical field
The present invention relates to a kind of rain water on roof recovery processing techniques.
Background technique
Sharp increase and rapid economic development with population, shortage of water resources have become whole world problems faced. China is water shortage big country, is had experts point out that China will enter serious water shortage period after 2010；The year two thousand thirty, China is by water shortage 400 billion cubic meters to 500 billion cubic meters, water shortage peak will will appear.Therefore benefit is collected using rainwater as important water resources With, have become solve the insufficient important channel of water resource.
Energy-saving and emission-reduction are the important measures of the sustainable development of socio-economy of implementing a scientific outlook on development, realize.Various regions go out respectively Platform develops the instruction of housing and public buildings that use less energy and land, wherein require about rainwater catchment system.With Energy-Saving andLand-Saving Residential quarters are built, and all kinds of rainwater catchment system technologies will be promoted and applied.
For urban rainwater as a kind of valuable water resource, Collection utilization mainly has roofing, road, the remittance of three kinds of permeability ground Flow medium.And comprehensively consider in terms of the medium that converges selects mainly from water quality, water and later collection.It is comprehensive For, rain water on roof, which accounts for, to have great advantage: first is that water quality is preferable, it is higher to be just able to satisfy water quality requirement without or by simply and easy treat Purposes, in contrast rainwater on road surface pollutional load is big, water quality inferiority；Second is that leakage is small since urban area roofing area is huge, It is more to collect rainfall, in contrast it is limited to collect rainfall substantially based on infiltration for permeability surface runoff rainwater；Third is that collecting Simple to operation using system, maintenance operation is at low cost, this be to water quality it is good, amount be directly proportional greatly；In addition, with other water supply Engineering is compared, and rain water on roof utilizing works influence very little to natural ecological environment.In short, the comprehensive advantage of rain water on roof, makes it Collecting recycling and reusing becomes inevitable.
The main technique of initial stage ground rainwater treatment is coagulating sedimentation at present, and main technique principle is the mud using accumulation Slag in raw water impurity particle contacts with each other, adsorbs, be aided with flocculant and reach the purification structure that clear water comparatively fast separates.It is such Technique has the advantages that production capacity is high, treatment effect is preferable, but also by factors such as raw water quality, water temperature and coagulant It influences, for the more demanding of water source to be processed, and is generally used for ground rainwater collection, is not suitable for the place of rain water on roof Reason.With the raising of technological level, the processing method of initial rainwater is also more and more.
Current initial rainwater treatment process is also rather limited in roof rainwater collection and the application in recycling field.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome existing initial rainwater treatment process not being suitable for roofing The defect of rainwater provides a kind of new rain water on roof recovery processing technique.Recovery processing technique of the invention can be well Removal of impurities and degerming are carried out to rain water on roof, treated, and rainwater can be used for the lives such as green area irrigation, road cleaning, carwash uses mixedly Water.Meanwhile recovery processing technique of the invention can be carried out continuously water process, be discharged, process flow is simple, Construction and operation at This is lower, can be realized automation, manage and maintain it is at low cost, with fabulous application prospect and environment-friendly advantage.
The present invention provides a kind of rain water on roof recovery processing techniques comprising following step: collecting rain water on roof, carries out Rainwater remaining after abandoned stream is mixed with aluminium polychloride and carries out coagulating, filtered after precipitation process by rain early-stage split-flow, Filtered rainwater is mixed with disinfection sanitizer and carries out sterilizing processing；Wherein, the disinfection sanitizer is to have Machine aluminium chloride ECH-98.
Wherein, the rain water on roof collects the various rainwater catchment modes that this field routine can be used, preferably by The mode of hydrocone type pressure current carries out.
Wherein, the abandoned stream amount of the initial Split-flow is according to pollutants such as the COD, BOD, SS, coloration of the rainwater collected Concentration determines, it is preferable that the COD value (COD) of remaining rainwater is 80~180mg/L after abandoned stream；BOD value (five days Biochemical oxygen demand (BOD)) it is 15~40mg/L；SS (suspended matter in water quality) is 20~100mg/L, preferably 40~100mg/ L；Coloration is 40~100 times, preferably 80~100 times.General 2~3mm of the abandoned stream runoff thickness of initial Split-flow.
Wherein, the rain early-stage split-flow can be used various initial Split-flow devices in this field and carry out, excellent in the present invention Choosing uses rainwater automatic diverter.The rainwater automatic diverter generallys use cyclonic separation principle and carries out Rainwater Initial Abandoned stream is controlled by time variable discharge quantity of initial rainwater by changing screen area and mesh number.The rain water on roof collected is tangentially square To the eddy flow sieve flowed into rainwater automatic diverter.At rainfall initial stage, since the screen surface is dry, on the surface of water Under tension and the effect of the sieve gradient, the rain water on roof collected flows to the drainpipe at center in screen surface with the state of eddy flow, Initial rainwater pours municipal Storm Sewer Network with sundries such as the leaves remained on sieve, realizes rain early-stage split-flow and rainwater The self cleaning of automatic diverter.With the continuity of rainfall, screen surface is constantly infiltrated, screen surface of the rainwater in infiltration On tension force effect will greatly reduce, middle and later periods rainwater will pass through sieve be pooled to the rainwater collection in rainwater automatic diverter Collect pipeline.
Wherein, the rainwater collected enters the rainwater automatic diverter by downpipe.
Wherein, dosage of the aluminium polychloride after abandoned stream in remaining rainwater is that the routine of this field adds Amount, preferably 5~6mg/L.
Wherein, the time of the coagulating is the conventional coagulation time of this field, preferably 20~40min.
Wherein, the precipitation process use this field routine precipitation treatment method, generally in rainwater sedimentation basin into Row.The time of the precipitation process is the conventional sedimentation time of this field, preferably 1~2h.
Wherein, the filter type that this field routine can be used in the filtering carries out, and preferably uses sand filters.Institute The various conventional sand filters for being used to filter water body in this field can be used in the sand filter stated.The filtering velocity of the sand filter is ability The conventional filtering velocity in domain, preferably 6m3/m2H~10m3/m2·h.The duty cycle of the sand filter be preferably 8h~ 12h, sand filter can be backwashed automatically after reaching the duty cycle, realize automatic pollution discharge.
Wherein, the ECH-98 is commercial goods, and manufacturer is Xiba Sci. & Tech. Co., Ltd., Shanghai.The ECH- Dosage in 98 rainwater after filtration is preferably 0.2~0.5mg/L.The time of the sterilizing processing is preferable For 0.5h~1.0h.
In a preferable embodiment of the invention, the concrete operations of the rain water on roof recovery processing technique include: The rainwater collected is carried out rainwater through rainwater automatic diverter by downpipe by the Accumulated Rainwater in a manner of hydrocone type pressure current Initial Split-flow, remaining rainwater enters rain water reservoir after abandoned stream, and boosted pump is promoted, by being mounted on the promotion water pump outlet pipe On the first chemicals dosing plant add the aluminium polychloride, the rainwater containing aluminium polychloride enter sedimentation basin carry out place of settling Reason adds the disinfection sanitizer by the second chemicals dosing plant and carries out sterilizing processing, subsequently enter after sand filters The storage of rainwater clear water reserviors.
In the present invention treated rain water on roof can reach miscellaneous domestic water quality standard CJ25.1-89:COD≤ 50mg/L, BOD≤10mg/L, SS (suspended matter in water quality)≤10mg/L, coloration≤30 times, turbidity < 5 can be used in afforesting The reclaimed waters such as irrigation, road cleaning, carwash.
Agents useful for same and raw material are commercially available unless otherwise specified in the present invention.
In the present invention, on the basis of common knowledge of the art, above-mentioned each technical characteristic optimum condition can be any group Conjunction obtains preferred embodiments.
The positive effect of the present invention is that:
1, rain water on roof recovery processing technique of the invention is capable of handling rain water on roof, reaches reclaimed water water quality Standard greatly improves rainwater utilization to realize the recycling and reusing of rainwater, meets environmental requirement.
2, recovery processing technique of the invention can be carried out continuously water process, be discharged, simple flow, Construction and operation cost It is lower, it can be realized automation, management is simple, at low cost, use easy to spread is managed and maintained, before fabulous application Scape.
Detailed description of the invention
Fig. 1 is the flow diagram of rainwater recycle treatment process of the present invention.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality It applies among a range.
Water-quality control national standard CJ25.1-89:COD≤50mg/L, BOD≤10mg/L, the SS (water of reclaimed water Suspended matter in matter)≤10mg/L, coloration≤30 times, turbidity≤5 or so.
In following embodiments, the detection method of COD, SS and coloration presses national standard execution:
COD examination criteria is GB/T 11914-1989 (dichromate titration measurement water chemical oxygen demand)；
BOD examination criteria is GB 7488-87 (water quality five-day BOD BOD5)；
SS examination criteria is GB 11901-1989 (gravimetric detemination water quality suspended matter)；
Colorimetric detection standard is GB/T 11903-1989 (measurement water quality coloration).
Fungicide ECH-98: Xiba Sci. & Tech. Co., Ltd., Shanghai.
Aluminium polychloride: Xiba Sci. & Tech. Co., Ltd., Shanghai.
Embodiment 1
Trial production test (see Fig. 1) has been carried out to the rain water on roof that certain cell generates.
(1) rain water on roof is collected by hydrocone type downpipe, is entered after rainwater automatic diverter carries out initial Split-flow Rain water reservoir, discharge quantity of initial rainwater are 3mm runoff thickness, the rainwater index after initial Split-flow are as follows: COD is 140~ 180mg/L, BOD are 30~40mg/L, and SS is 80~100mg/L, and coloration is 100 times；
(2) the boosted pump of rainwater is lifted into rainwater sedimentation basin, and the first chemicals dosing plant is installed on the outlet pipe of elevator pump, Aluminium polychloride is added, dosage 6mg/L carries out carrying out precipitation process while coagulating (reaction time 40min) (time 2h)；
(3) with sand filters (filtering velocity 10m3/m2H, duty cycle 12h) it is added afterwards by the second chemicals dosing plant Disinfection sanitizer ECH-98 carries out sterilizing processing, and disinfection sanitizer dosage is 0.5mg/L, and disinfection time is 30min, the rainwater handled well enter the storage of rainwater clear water reserviors.
Start and operation result is shown, the system run all right, treatment effect is fine.
It is detected, the rainwater COD handled well is 35~45mg/L, and BOD is 6~8mg/L, and SS (suspended matter in water quality) is 7 ~9mg/L, coloration are 25 times, turbidity < 5, reach the Water-quality control CJ25.1-89 national standard of reclaimed water.
Embodiment 2
Trial production test (Fig. 1) has been carried out to the rain water on roof that certain cell generates.
(1) rain water on roof is collected by hydrocone type downpipe, is entered after rainwater automatic diverter carries out initial Split-flow Rain water reservoir, discharge quantity of initial rainwater are 2mm runoff thickness；The index of rainwater after initial Split-flow are as follows: COD be 100~ 140mg/L, BOD are 25~35mg/L, and SS is 60~80mg/L, and coloration is 90 times or so；
(2) the boosted pump of rainwater is lifted into rainwater sedimentation basin, and the first chemicals dosing plant is installed on the outlet pipe of elevator pump, Aluminium polychloride is added, dosage 5mg/L carries out carrying out precipitation process while coagulating (reaction time 30min) (time 1.5h)；
(3) with sand filters (filtering velocity 8m3/m2H, duty cycle 10h) it is added afterwards by the second chemicals dosing plant Disinfection sanitizer ECH-98 carries out sterilizing processing, and disinfection sanitizer dosage is 0.3mg/L, and disinfection time is 40min, the rainwater handled well enter the storage of rainwater clear water reserviors.
Start and operation result is shown, the system run all right, treatment effect is fine.
Detected, the rainwater COD handled well be 25~35mg/L, BOD be 6~8mg/L, SS (suspended matter in water quality) 8~ 9mg/L, coloration are 20 times, turbidity < 5, reach the Water-quality control CJ25.1-89 national standard of reclaimed water.
Embodiment 3
Trial production test (referring to attached drawing 1) has been carried out to the rain water on roof that certain cell generates.
(1) rain water on roof is collected by hydrocone type downpipe, is entered after rainwater automatic diverter carries out initial Split-flow Rain water reservoir, discharge quantity of initial rainwater are 2mm runoff thickness；The index of rainwater after initial Split-flow are as follows: COD be 80~ 100mg/L, BOD are 15~25mg/L, and SS is 40~60mg/L, and coloration is 80 times or so.
(2) the boosted pump of rainwater is lifted into rainwater sedimentation basin, and the first chemicals dosing plant is installed on the outlet pipe of elevator pump, Aluminium polychloride is added, dosage 5mg/L carries out carrying out precipitation process while coagulating (reaction time 40min) (time 1.5h)；
(3) with sand filters (filtering velocity 6m3/m2H, duty cycle 8h) it is added kill by the second chemicals dosing plant afterwards Bacterium disinfectant ECH-98 carries out sterilizing processing, and disinfection sanitizer dosage is 0.5mg/L, and disinfection time is 50min, the rainwater handled well enter the storage of rainwater clear water reserviors.
Start and operation result is shown, the system run all right, treatment effect is fine.
It is detected, rainwater COD 0mg/L, BOD < 10mg/L, SS (suspended matter in water quality) the < 10mg/L handled well, color 30 times of <, turbidity < 5 of degree, reaches the Water-quality control CJ25.1-89 national standard of reclaimed water.

Claims (9)

1. a kind of rain water on roof recovery processing technique comprising following step: collect rain water on roof, carries out rain early-stage split-flow, Rainwater remaining after abandoned stream is mixed with aluminium polychloride and carries out coagulating, is filtered after precipitation process, by filtered rain Water is mixed with disinfection sanitizer carries out sterilizing processing；Wherein, the disinfection sanitizer is organic chloride aluminium ECH- 98；Dosage in the rainwater of the ECH-98 after filtration is 0.2~0.5mg/L；The time of the sterilizing processing For 0.5h~1.0h；The abandoned stream amount of the initial Split-flow makes 80~180mg/L of COD value of remaining rainwater after abandoned stream；BOD value For 15~40mg/L；SS is 20~100mg/L, and coloration is 40~100 times；The filtering is carried out using sand filter；The sand The filtering velocity of filter is 6m3/m2H~10m3/m2·h；The duty cycle of the sand filter is 8h~12h.
2. recovery processing technique as described in claim 1, it is characterised in that: the aluminium polychloride is remaining after abandoned stream Dosage in rainwater is 5~6mg/L.
3. recovery processing technique as claimed in claim 1 or 2, it is characterised in that: described to collect through hydrocone type pressure current Mode carries out.
4. recovery processing technique as claimed in claim 1 or 2, it is characterised in that: the rain early-stage split-flow uses rainwater Automatic diverter carries out.
5. recovery processing technique as claimed in claim 1 or 2, it is characterised in that: the abandoned stream amount of the initial Split-flow makes abandoned stream The SS of remaining rainwater is 40~100mg/L afterwards；Coloration is 80~100 times.
6. recovery processing technique as claimed in claim 4, it is characterised in that: more than the abandoned stream amount of the initial Split-flow makes after abandoned stream Under rainwater SS be 40~100mg/L；Coloration is 80~100 times.
7. recovery processing technique as claimed in claim 1 or 2, it is characterised in that: the abandoned stream amount is 2~3mm of abandoned stream diameter Flow thickness.
8. recovery processing technique as claimed in claim 4, it is characterised in that: the abandoned stream amount is that 2~3mm of abandoned stream runoff is thick Degree.
9. recovery processing technique as claimed in claim 1 or 2, it is characterised in that: the time of the precipitation process is 1-2h.
CN201810962833.4A 2018-08-22 2018-08-22 Rain water on roof recovery processing technique Withdrawn CN108996757A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810962833.4A CN108996757A (en) 2018-08-22 2018-08-22 Rain water on roof recovery processing technique

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103183426A (en) * 2011-12-30 2013-07-03 王炜 Roof rainwater recovery treatment process
CN205935042U (en) * 2016-08-22 2017-02-08 河南省建筑科学研究院有限公司 Sponge urban rainwater processing system
CN107010780A (en) * 2017-03-16 2017-08-04 浙江水利水电学院 A kind of purification method of urban rainwater and its hydraulic jump formula filter used

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103183426A (en) * 2011-12-30 2013-07-03 王炜 Roof rainwater recovery treatment process
CN205935042U (en) * 2016-08-22 2017-02-08 河南省建筑科学研究院有限公司 Sponge urban rainwater processing system
CN107010780A (en) * 2017-03-16 2017-08-04 浙江水利水电学院 A kind of purification method of urban rainwater and its hydraulic jump formula filter used

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