CN203834561U - Integrated rainwater collection and utilization system - Google Patents
Integrated rainwater collection and utilization system Download PDFInfo
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- CN203834561U CN203834561U CN201420243655.7U CN201420243655U CN203834561U CN 203834561 U CN203834561 U CN 203834561U CN 201420243655 U CN201420243655 U CN 201420243655U CN 203834561 U CN203834561 U CN 203834561U
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- rainwater
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
The utility model relates to an integrated rainwater collection and utilization system. The integrated rainwater collection and utilization system comprises a plurality of strip-shaped rainwater collection tanks and an integrated processing device. The strip-shaped rainwater collection tanks are connected in series through pipelines. A flocculation chamber, a settling zone, a filter, a clean water basin, a disinfector, a lifting water pump, a reuse water pump and a control system are arranged in the integrated processing device, wherein the flocculation chamber, the settling zone, the filter and the clean water basin are sequentially communicated. A flocculant addition system is arranged in the flocculation chamber. The bottom of the filter is communicated with the settling zone, the upper portion of the filter is communicated with the clean water basin, a water outlet pipe of the clean water basin is provided with the reuse water pump, and a water outlet pipe of the reuse water pump is provided with the disinfector. According to the integrated rainwater collection and utilization system, the rainwater collection and utilization steps comprise pretreatment, flocculant addition, sediment, filtering, disinfection and reuse. The integrated rainwater collection and utilization system has the advantages that the integration level is high, the process is mature and reliable, the automation degree is high and operating maintenance and management are simple, and is especially suitable for construction projects which are provided with the rainwater collection and utilization system and are short in outdoor land.
Description
[technical field]
The utility model relates to rainwater catchment system technical field, and specifically a kind of integrated rainwater collecting utilizes system.
[background technology]
Quickening along with Urbanization in China, urban surface Permeable stratum area constantly increases, flow path surface increases, peak flood flow increases and time advance, cause the Disaster Defense Capability in city to weaken, storm flood disaster odds increases, strongly disturb the original hydrology in city ecological, destroyed natural hydrologic cycle process.Rainwater utilization engineering is to guarantee that the rainfall runoff increment causing because of hardened ground is all retained and utilized, and guarantees that the Rainfall runoff discharging outside community is not more than hardened ground level before.
At present, rainwater-collecting reclaiming system is generally comprised of gathering system (comprising collection conduit system, early-stage rainwater stream abandoning, rainwater-collecting pond), treatment system (comprising pretreatment, filtration, decontamination system), reclaiming system (comprising lifting means, reuse pipe-line system, control system).The following technological process of its general employing:
as shown in Figure 10.
Technical characterstic about traditional each link of Rainwater collection system technology is as follows:
(1) outdoor rainwater catchment system pipe-line system: rainwater-collecting pipe-line system comprises storm sewer, manhole etc.
(2) early-stage rainwater stream abandoning: in the process of rainfall because rainfall is to atmosphere leaching, the wash away effect of surface runoff to the decomposition precipitate of underlying surface surface deposits and surperficial constructional materials, cause early-stage rainwater degree of contamination higher, continuity along with rainfall, in rainfall runoff, pollutant load reduces gradually and tends towards stability, and the water quality of rainfall runoff obviously improves.Be beneficial to this rule of rainwater Precipitation Process, in rainwater utilization system, the higher early-stage rainwater of pollution concentration is given it up, and the way that intermediary and later stages rainwater-collecting is got up is referred to as the initial Split-flow of rainwater, the good rainwater of water quality has effectively been collected in this behave, alleviated the burden of subsequent treatment structure, save investment, reduced operating cost.Main abandoned stream facility service condition, distinguishes and can be divided into five large classes by operating principle: displacement type, rainfall regime, flow type, infiltration well type, big or small cast from the market.The utility model patent wouldn't contain abandoned stream part.
(3) rainwater-collecting pond: rainwater-collecting pond is generally and is arranged on the position that site elevation is lower, up to a hundred cubes easily of volumes,, often adopt steel concrete material or water storage PE module pond by large thousands of cubes.In the city of an inch of land is an inch of gold, due to nearer apart from land red-line of basement profile, a lot of project difficulties are on the outdoor more regular ground of looking for one dozens or even hundreds of square, for arranging concentrated rainwater-collecting pond.If rainwater-collecting pond is placed in basement, may need to have occupied a part of parking stall, simultaneously by rainwater from the outdoor basement that is directed to, be the way of inviting a wolf into house, likely cause the accident of flooding basement, there is potential safety hazard.
(4) rainwater is processed reclaiming system: different according to the purposes of Rainwater collection system reuse, the Rainwater Quality situation of collecting and the requirement of reuse water quality, generally need be by processing in various degree during rainwater reuse.
China region is wide, and the weather of different regions is different, and all there are larger difference the rainfall intensity of every rainfall, interval time etc., cause rainfall runoff water quality also to differ greatly, and the water quality situation of runoff rainwater can be weighed by CODcr and SS index.Wherein, SS: i.e. suspension content in water, refers to the total amount of inorganic matter, organic matter and silt particle, clay, the microorganism etc. of the water fast in water.Suspension is the main cause that causes water muddiness, and easy anaerobic fermentation after the organic suspended matter deposition in water body, makes water quality deterioration.CODcr: i.e. chemical oxygen consumption (COC) is the index of weighing Organic Pollution, and the numerical value of COD is larger, and water body organic contamination is more serious.
The water quality of natural rainwater is good, its CODcr average out to 20～60mg/L, and SS is on average less than 20mg/L.Natural rainwater is through leaching and the souring to underlying surface of atmosphere, and the water quality menarche of rain water on roof after runoff abandoned stream, can adopt following empirical value: CODcr70～100mg/L during without field data, SS20～40mg/L, colourity 10～40 degree.(should build and community rainwater utilization engineering legislation > > (GB50400-2006) data from < <)
The water quality standard of recycle-water is: if be back to recreational water scenery, and CODcr≤20mg/L, SS≤5mg/L; If be back to, view and admire water scenery, greening, road and water and spill, flush the toilet, CODcr≤30mg/L, SS≤10mg/L; If be back to, vehicle rinses, circulating cooling system moisturizing, CODcr≤30mg/L, SS≤5mg/L.(should be data from: < < building and community rainwater utilization engineering legislation > > (GB50400-2006))
According to entering the water quality situation of rainwater and the comparison of quality of reused water situation of collecting reclaiming system, mainly want treatment S S and COD index, the biodegradability of rainwater is poor, therefore enters the processing mode of collecting the rainwater that utilizes system, be similar to tap water rivers water source treatment process, generally adopt:
The treatment system of traditional Rainwater collection system technology has the following disadvantages: system intensive, standardization level is not high, the gathering system of rainwater recycling system and rainwater, the relevance for the treatment of system are poor, do not form supporting, be unfavorable for selecting of person skilled, be unfavorable for promoting the use of this rainwater utilization.
[utility model content]
The purpose of this utility model is exactly will solve above-mentioned deficiency and provide a kind of integrated rainwater collecting to utilize system, there is the advantages such as Highgrade integration, technical maturity is reliable, automaticity is high, operation maintenance management is simple, be specially adapted to be provided with Rainwater collection system, and the construction project of outdoor land used anxiety.
Design for achieving the above object a kind of integrated rainwater collecting and utilize system, comprise rain water collecting system and rain processing system, described rain water collecting system is in series by a plurality of bar shaped rainwater-collectings pond, described a plurality of bar shaped rainwater-collectings pond connects by pipeline each other, described rain processing system is integrated form treating apparatus, in described integrated form treating apparatus, be provided with flocculating chamber, settling zone, strainer, clear water reserviors, sterilizer, promote water pump, reuse water pump and control system, described flocculating chamber, settling zone, strainer, clear water reserviors are communicated with successively, in described flocculating chamber, be provided with flocculant concentration system, described filter bottom is communicated with settling zone, described strainer top is communicated with clear water reserviors, the outlet pipe of described clear water reserviors is provided with reuse water pump, the outlet pipe of described reuse water pump is provided with sterilizer.
Described settling zone is tube settling district, and described tube settling district comprises a plurality of tubulose honeycomb inclined-tubes, and below, described tube settling district is provided with heavy bucket.
Described sterilizer adopts ultraviolet ray disinfector.
Described strainer adopts filter-cloth filtering, and described filter cloth is monofilament filter cloth.
Described flocculant concentration system comprises flocculant chemicals feed pump and flocculant cartridge case, and described flocculant chemicals feed pump, lifting water pump, reuse water pump are respectively by PLC connection control system.
Described reuse water pump adopts frequency conversion reuse water pump.
Compared with the existing technology, tool has the following advantages the utility model:
(1) be arranged on outdoor bar shaped rainwater-collecting pond and integrate outdoor rainwater catchment system pipe-line system and rainwater collecting-tank, the rainwater collecting-tank of large volume is broken the whole up into parts, rainwater after making it by a plurality of bar shaped water storage modules pond combination store collected, thereby can utilize substantially the position of some corners within the scope of building land, and owing to entering the rainwater in bar shaped rainwater-collecting pond, the time of staying is long, this bar shaped rainwater-collecting pond is the also effect of double sedimentation basin simultaneously, Di She mud pit, pond, waterpower spoil disposal;
(2) integrated form treating apparatus is the integrated equipment that one was processed, was back to a set of collection, and its technological process is:
itself and strip stormwater tank are supporting, adopt long and narrow structure, and facility, the equipment such as sedimentation basin, strainer, sterilization, clear water reserviors, reuse water pump are integrated into monolithic, conveniently select;
(3) the utility model provides a kind of integration type Rainwater collection system technology, this system has the advantages such as Highgrade integration, technical maturity is reliable, automaticity is high, operation maintenance management is simple, be specially adapted to be provided with Rainwater collection system, and the construction project of outdoor land used anxiety;
(4) this system is integrated by traditional outdoor rain water collection pipe road and rainwater-collecting pond, and rain processing system is integrated, thereby be conducive to the standardization of rainwater-collecting reclaiming system, be convenient to selecting of design side, to promoting rainwater recycle, utilize system to play positive meaning, can advance to a certain extent Green Architectural Development;
(5) places such as advanced treating, water scenery water treatment that integrated form treating apparatus is also applicable to being used in water in the pouring of landscape water Reuse on Environment, municipal administration or provides middle water for oneself, applied widely, be beneficial to promoting the use of rainwater utilization.
[accompanying drawing explanation]
Fig. 1 is the schematic flow sheet that in the utility model, integrated rainwater collecting utilizes system;
Fig. 2 is the use schematic diagram that in the utility model, integrated rainwater collecting utilizes system;
Fig. 3 is the floor map of integrated form treating apparatus in the utility model;
Fig. 4 is A-A sectional view in Fig. 3;
Fig. 5 is B-B sectional view in Fig. 3;
Fig. 6 is C-C sectional view in Fig. 3;
Fig. 7 is the floor map in bar shaped rainwater-collecting pond in the utility model;
Fig. 8 is D-D sectional view in Fig. 7;
Fig. 9 is E-E sectional view in Fig. 7;
Figure 10 is traditional Rainwater collection system schematic diagram;
In figure: 1, promote water pump 2, flocculant chemicals feed pump 3, flocculant cartridge case 4, settling zone 5, waterpower mud pipe 6, strainer 7, reuse water pump 8, sterilizer 9, control cabinet 10, integrated form treating apparatus 11, bar shaped rainwater-collecting pond 12, flocculating chamber 13, clear water reserviors 14, heavy bucket 15, rainwater-collecting pipeline 16, building monomer 17, Vertical pipe flow abandoning apparatus 18, abandoned stream drainage pipe 19, outdoor rainwater-collecting delivery pipe 20, equipment room 21, rain water on roof pipe 22, ground rainwater gutter 23, bleed off pipe 24, outdoor site rainwater gutter 25, arrange municipal rain pipe 26, reservoir 27, process machine room.
[specific embodiment]
Below in conjunction with accompanying drawing, the utility model is done to following further illustrating:
As shown in drawings, the utility model comprises: rain water collecting system and rain processing system, rain water collecting system is in series by a plurality of bar shaped rainwater-collectings pond 11, a plurality of bar shaped rainwater-collectings pond connects by pipeline each other, rain processing system is integrated form treating apparatus 10, in integrated form treating apparatus, be provided with flocculating chamber 12, settling zone 4, strainer 6, clear water reserviors 13, sterilizer 8, promote water pump 1, reuse water pump 7 and control system, flocculating chamber, settling zone, strainer, clear water reserviors are communicated with successively, in flocculating chamber, be provided with flocculant concentration system, filter bottom is communicated with settling zone, strainer top is communicated with clear water reserviors, the outlet pipe of clear water reserviors is provided with reuse water pump, the outlet pipe of reuse water pump is provided with sterilizer, wherein, settling zone is tube settling district, and tube settling district comprises a plurality of tubulose honeycomb inclined-tubes, and below, tube settling district is provided with heavy bucket 14, sterilizer adopts ultraviolet ray disinfector, and strainer adopts filter-cloth filtering, and filter cloth is monofilament filter cloth, reuse water pump adopts frequency conversion reuse water pump, flocculant concentration system comprises flocculant chemicals feed pump 2 and flocculant cartridge case 3, and flocculant chemicals feed pump, lifting water pump, reuse water pump are respectively by PLC connection control system.
The rainwater catchment system method that adopts system described in the utility model, comprises the following steps:
1) pretreatment: rainwater enters bar shaped rainwater-collecting pond through rainwater-collecting pipeline, and this bar shaped rainwater-collecting pond is provided with a plurality of and connects by pipeline, and the rainwater that enters bar shaped rainwater-collecting pond stops for a long time, and the bulky grain in rainwater fully precipitates; In this step, rainwater also comprises the step that it is processed by screen cloth grid before entering bar shaped rainwater-collecting pond, to remove large solid impurity;
2) flocculant concentration: the rainwater of collecting in bar shaped rainwater-collecting pond is introduced to the flocculating chamber of integrated form treating apparatus, adopted flocculant chemicals feed pump automatically fixed than adding flocculant, flocculant reacts with rainwater is mixed, forms larger floccule body;
3) precipitation: be delivered to settling zone with the reacted rainwater of flocculant, this settling zone adopts tube settling district, tube settling district comprises a plurality of tubulose honeycomb inclined-tubes, use the principle of shallow pond precipitation, application precipitation is removed suspension in water, below, tube settling district is provided with heavy bucket, and the heavy mud in tube settling district is by waterpower mud pipe automatic-discharging;
4) filter: through the water of precipitation process, by promoting water pump, pump into strainer, adopt filter cloth to filter, as adopted monofilament polypropylene fibre filter cloth, this monofilament polypropylene fibre filter cloth surface is through thermal finalization processing and calender process;
5) sterilization: through the water of filter process, by recycle-water water pump outlet pipe, adopt ultraviolet ray disinfector to carry out disinfection by ultraviolet light;
6) reuse: the water after disinfection enters clear water reserviors, is exported by reuse water pump, in order to utilizing.
Above-mentioned steps 1) to step 6) in, control system adopts PLC programming automatically to control, and flocculant chemicals feed pump, lifting water pump, reuse water pump are respectively by PLC connection control system.
Integrated rainwater collecting described in the utility model utilizes system to be comprised of bar shaped rainwater-collecting pond and integrated form treating apparatus, is referred to as integrated rainwater collecting and utilizes system in accompanying drawing 2 in dotted line, intends adopting following technological process:
wherein, bar shaped rainwater-collecting pond is arranged on outdoor, integrate outdoor rainwater catchment system pipe-line system and rainwater collecting-tank, the rainwater collecting-tank of large volume is broken the whole up into parts, by the rainwater after a plurality of bar shaped water storage modules pond combination store collected, the position of some corners within the scope of energy maximum using building land, and owing to entering the rainwater of collecting pit, the time of staying is long, collecting pit is the also effect of double sedimentation basin simultaneously, Di She mud pit, pond, waterpower spoil disposal.Integrated form treating apparatus is the integrated equipment that one was processed, was back to a set of collection, and technological process is:
match with bar shaped rainwater-collecting pond, adopt long and narrow structure, facility, the equipment such as sedimentation basin, strainer, sterilization, clear water reserviors, reuse water pump are integrated into monolithic, thereby facilitated, select.
In the utility model, the technical essential of the effect of each link of integrated form treating apparatus is:
(1) pretreatment:
Grid (net): for removing large solid impurity, complete before entering bar shaped rainwater-collecting pond;
Preliminary sedimentation: for removing water suspended solid, comprise mud, sand etc., reach removal effect, generally want certain time of staying, the time, more long-acting fruit was better, completed in bar shaped rainwater-collecting pond.
(2) flocculation meter dosing system
The rainwater of collecting " long-time stop in bar shaped rainwater-collecting pond; bulky grain fully precipitate; thus it is very tiny to enter into the particle diameter of suspended material of water for the treatment of system; for removing these materials conventionally by means of the means of coagulation; add suitable coagulant in former water; flocculant by considerations employing automatic switching Teat pipette automatically calmly than adding, equipment Zhong Jiangshe flocculating chamber, flocculant and former water are through fully mixed, destroy hydrocolloid stability (de-steady), and adsorb mutually with the polymer after coagulant hydrolysis, make particle there is flocculating property.
The object of flocculating chamber is to create suitable hydraulics, makes this particle with flocculating property be in contact with one another middle gathering, to form larger floccule body (wadding grain).
(3) depositing separation area
Depositing separation area is a kind of structure that application precipitation is removed suspension in water, in water treatment, widely uses.Sedimentation basin pattern is a lot, and the utility model adopts and in Water and Waste Water Engineering, uses extensively and higher water treatment facilities, i.e. a tube settler of efficiency.
Tube settler is to use shallow pond precipitation principle, can reduce desilting area and sedimentation time, and treatment effect is high, and floor space is little, and maintenance management is convenient and simple.
The heavy mud of tube settler will be provided with waterpower mud pipe automatic-discharging.
(4) filter
Rainwater complicated component, in suspension, the density of part silt and quartz sand are more approaching, adopt traditional quartz filter, in the course of time will certainly affect filter capacity, backwash effect is also by influenced, and the organic substances such as bacterium, algae are to be generally attached to particle surface, long-term operational system stability is not good enough, even can cause filter bed filtrate to harden, change filtrate difficulty loaded down with trivial details, maintenance management is complicated.
Because above reason the utility model adopts filter cloth, completing filtration, adopt filter-cloth filtering, is a kind of of membrane process.
Filter cloth is of a great variety, considers and completes precipitation, can adopt filtering accuracy not high, is easy to the monofilament polypropylene fibre filter cloth of maintenance management.
The advantage of monofilament filter cloth is: 1. single synthetic fibers are weaved and formed, and intensity is large, is difficult for blocking, and does not have the situation of broken yarn; 2. surface is high, not yielding through thermal finalization processing, stability, and aperture is even; 3. surface is through the monofilament filter cloth of calender process, and smooth surface filter cake is easily peeled off, and the regeneration of filter cloth easy cleaning easily.
(5) sterilization
On recycle-water water pump outlet pipe, consider to adopt disinfection by ultraviolet light, adopt ultraviolet ray disinfector to there is following advantage: 1. ultraviolet ray disinfector germicidal efficiency is high, to bacterium, virus, generally at 1～2 second, can reach the sterilizing rate of 99%-99.9%; 2. ultraviolet ray disinfector efficient sterilizing broad spectrum activity, can high efficiency kill nearly all bacterium, virus; 3. ultraviolet sterilization does not add any chemical agent, so it can not produce secondary pollution to water body and surrounding environment; 4. ultraviolet ray disinfector security of operation, reliable; 5. ultraviolet ray disinfector cost and operation and maintenance cost are low, and equipment takes up an area little, and operation aspect cost is 1/2 of chlorination.
(6) PLC control system
Control system adopts PLC programming automatically to control, and automaticity is high.
(7) reclaiming system
In conjunction with reuse purposes, select frequency conversion reuse water pump, automated programming is controlled.
The utility model is not subject to the restriction of above-mentioned embodiment; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (6)
1. an integrated rainwater collecting utilizes system, comprise rain water collecting system and rain processing system, it is characterized in that: described rain water collecting system is in series by a plurality of bar shaped rainwater-collectings pond, described a plurality of bar shaped rainwater-collectings pond connects by pipeline each other, described rain processing system is integrated form treating apparatus, in described integrated form treating apparatus, be provided with flocculating chamber, settling zone, strainer, clear water reserviors, sterilizer, promote water pump, reuse water pump and control system, described flocculating chamber, settling zone, strainer, clear water reserviors are communicated with successively, in described flocculating chamber, be provided with flocculant concentration system, described filter bottom is communicated with settling zone, described strainer top is communicated with clear water reserviors, the outlet pipe of described clear water reserviors is provided with reuse water pump, the outlet pipe of described reuse water pump is provided with sterilizer.
2. integrated rainwater collecting as claimed in claim 1 utilizes system, it is characterized in that: described settling zone is tube settling district, and described tube settling district comprises a plurality of tubulose honeycomb inclined-tubes, and below, described tube settling district is provided with heavy bucket.
3. integrated rainwater collecting as claimed in claim 1 or 2 utilizes system, it is characterized in that: described sterilizer adopts ultraviolet ray disinfector.
4. integrated rainwater collecting as claimed in claim 3 utilizes system, it is characterized in that: described strainer adopts filter-cloth filtering, and described filter cloth is monofilament filter cloth.
5. integrated rainwater collecting as claimed in claim 4 utilizes system, it is characterized in that: described flocculant concentration system comprises flocculant chemicals feed pump and flocculant cartridge case, described flocculant chemicals feed pump, lifting water pump, reuse water pump are respectively by PLC connection control system.
6. integrated rainwater collecting as claimed in claim 5 utilizes system, it is characterized in that: described reuse water pump adopts frequency conversion reuse water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420243655.7U CN203834561U (en) | 2014-05-13 | 2014-05-13 | Integrated rainwater collection and utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420243655.7U CN203834561U (en) | 2014-05-13 | 2014-05-13 | Integrated rainwater collection and utilization system |
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| CN203834561U true CN203834561U (en) | 2014-09-17 |
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| CN201420243655.7U Expired - Fee Related CN203834561U (en) | 2014-05-13 | 2014-05-13 | Integrated rainwater collection and utilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953095A (en) * | 2014-05-13 | 2014-07-30 | 沃清环保科技（上海）有限公司 | Integrated rainwater collection and utilization system and method thereof |
| CN104829051A (en) * | 2015-04-27 | 2015-08-12 | 桂林市广泽科技开发有限公司 | Intelligent rainwater/waste water purification treatment system and application and treatment method thereof |
| CN105948345A (en) * | 2016-06-16 | 2016-09-21 | 苏州科博思流体科技有限公司 | Water circulation utilization system |
-
2014
- 2014-05-13 CN CN201420243655.7U patent/CN203834561U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953095A (en) * | 2014-05-13 | 2014-07-30 | 沃清环保科技（上海）有限公司 | Integrated rainwater collection and utilization system and method thereof |
| CN103953095B (en) * | 2014-05-13 | 2016-08-24 | 沃清环保科技（上海）有限公司 | Integrated rainwater collecting utilizes system and method |
| CN104829051A (en) * | 2015-04-27 | 2015-08-12 | 桂林市广泽科技开发有限公司 | Intelligent rainwater/waste water purification treatment system and application and treatment method thereof |
| CN105948345A (en) * | 2016-06-16 | 2016-09-21 | 苏州科博思流体科技有限公司 | Water circulation utilization system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20210513 |
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| CF01 | Termination of patent right due to non-payment of annual fee |