CN103626311A - Low-yield single-pump two-stage reverse osmosis system - Google Patents
Low-yield single-pump two-stage reverse osmosis system Download PDFInfo
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- CN103626311A CN103626311A CN201210304335.3A CN201210304335A CN103626311A CN 103626311 A CN103626311 A CN 103626311A CN 201210304335 A CN201210304335 A CN 201210304335A CN 103626311 A CN103626311 A CN 103626311A
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- reverse osmosis
- water
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- stage reverse
- osmosis film
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- 238000003908 quality control method Methods 0.000 claims abstract description 18
- 206010000210 abortion Diseases 0.000 claims description 15
- 231100000176 abortion Toxicity 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 8
- 238000009991 scouring Methods 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 6
- 238000005342 ion exchange Methods 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 229910021642 ultra pure water Inorganic materials 0.000 abstract 1
- 239000012498 ultrapure water Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 11
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000002203 pretreatment Methods 0.000 description 3
- 235000019600 saltiness Nutrition 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to a low-yield single-pump two-stage reverse osmosis system. Pretreated running water is connected with a first-stage reverse osmosis membrane through a first-stage booster pump. A concentrated water outlet pipeline of the first-stage reverse osmosis membrane is sequentially and serially connected with a first-stage pressure gauge and a first-stage waste water proportional valve. The first-stage waste water proportional valve is in parallel connection with a washing electromagnetic valve and then connected with a concentrated water outlet. A pure water outlet pipeline of the first-stage reverse osmosis membrane is sequentially and serially connected with a second-stage pressure gauge and a one-way valve A and then connected with a water inlet of a second-stage reverse osmosis membrane. Waste water of the second-stage reverse osmosis membrane flows back to a water inlet of the booster pump through a second-stage proportional valve. A second-stage pure water outlet pipeline of the second-stage reverse osmosis membrane is sequentially and serially connected with a water quality monitoring instrument and a producing water quality control valve. By employing the low-yield single-pump two-stage reverse osmosis system, producing water quality can reach standards fast, long-term stability of the producing water quality is achieved, recovery reaches at least 20%, complex pretreating processes are not needed, salt removing rate can stably reach more than 99%, and double reduction of producing cost of ultrapure water produced by using DI (desorption ionization) (ion exchange) as post-stage purification.
Description
Technical field
The present invention relates to miniature water purification system, refer in particular to the water purification system of a kind of≤25 ℃ of 10L/H@.
Background technology
Existing miniature water purification system extensively adopts reverse osmosis technology in elementary purification phase, structure space based on mini-system and cost and design difficulty are considered, extensively adopt at present single-stage reverse osmosis (single-stage RO) technique, although and the application of this technology can reach the object of removing 90% above mineral ion, organism and particulate equally, there is following disadvantage:
1) when tackling compared with supersalinity water source, single-stage RO system ratio of desalinization cannot guarantee enough ratio of desalinization---the desalination characteristic based on reverse osmosis membrane self be take clearance as standard, the saltiness that its saltiness of producing water also can be followed into water improves and improves accordingly, when fixing certain index, cannot reach both fixed output quota water conductivity standards; Owing to producing, water water quality saltiness (ionic concn) is also higher, if back segment also needs to carry out degree of depth purifying, such as using ion-exchange techniques, also can directly reduce the treatment capacity of ion exchange resin and use the effect phase;
2) produce water quality stabilizing not good---many impacts such as the product water water quality of single-stage reverse osmosis system is stressed simultaneously, temperature, PH, once conditional fluctuation produces water water quality by rapid fluctuations, and time that need to be longer is again stable;
In addition, also have the technology of similar small-sized double-stage reverse osmosis (twin-stage RO) design to be applied in miniature water purification system, but they there are the following problems conventionally:
1) rate of recovery is not high---because being product water with first-stage reverse osmosis film (single the film rate of recovery is between 15-30% conventionally), double-stage reverse osmosis designs as the water that enters of two-pass reverse osmosis film, the method certainly will cause the recovery utilization rate of entire system extremely low, for compact simplified double-stage reverse osmosis system, the entire system rate of recovery is no more than 15-20% conventionally;
2) wearing quality and reliability are not high---because mini-system is different from industrial system, principle based on economy and practicality, the preprocessing process of its former water is simple, the controllability of system operational parameters is lower, and conventionally former water is not softened, cause the membrane filtration system may be for a long time in imperfect (even severe) state work, easily bring out the problem of fouling, dirty stifled, degradation, therefore often the life-span be not high, producing water water quality equally can not be steady in a long-term;
3) system design is complicated---and some small-sized twin-stage reverse osmosis system designs with reference to industrial system, cause system very complicated, cost significantly improves, and the economic benefit therefore producing is not obvious, meanwhile, the complicacy of system has been brought a lot of inconvenience to the operation and maintenance of unprofessional user.
Summary of the invention
The weak point existing for prior art, the invention provides a kind of simple in structurely, and volume is little, the abortion amount list pump type double-stage reverse osmosis system that cost is low.This system, in the face of supersalinity and various complicated water source, can guarantee to produce water water quality reaching standard fast and long-term stability; The rate of recovery can reach more than 20%; Pretreatment technology that need not be complicated, the most general 5um Filament-wound Machine filter core+granulated active carbon filter element filtering can enter water as system; Equipment with high desalinization, can be steady in a long-term more than 99%; Significantly reduce the working load of back segment deep layer purifying filtrate (as ion exchange resin), in the prolongs life cycle, reduce at double its water producing cost.
For achieving the above object, technical solution of the present invention is:
Abortion amount list pump type double-stage reverse osmosis system, is characterized in that: this system comprises first-stage reverse osmosis film and the two-pass reverse osmosis film communicating; Pretreated tap water connects first-stage reverse osmosis film through a topping-up pump; The dense water out pipeline of this first-stage reverse osmosis film is sequentially in series with 1 first class pressure table and 1 one-level waste water proportional valve, after this one-level waste water proportional valve scouring electromagnetic valve in parallel, connects concentrated water discharge mouth; The pure water outlet conduit of this first-stage reverse osmosis film is sequentially connected and is connected the water inlet of two-pass reverse osmosis film after 1 secondary pressure table, check valve A; The waste water of two-pass reverse osmosis film is back to topping-up pump water inlet through 1 secondary waste water proportional valve; The secondary pure water outlet conduit of the two-pass reverse osmosis film water quality measurement instrument and of sequentially connecting is produced water quality control valve, defective product water through the Quality Control of water quality measurement instrument is gone to concentrated water discharge mouth from producing an outlet of water quality control valve, and qualified product water flows out via another outlet of producing water quality control valve.
Further, between secondary waste water proportional valve and topping-up pump, be provided with a check valve B.
Further, between two-pass reverse osmosis film and water quality measurement instrument, be provided with a check valve C.
Further, produce between water quality control valve and concentrated water discharge mouth and be provided with a check valve D.
Further, the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.
The usefulness that the present invention compares with currently available products is:
Relative single-stage reverse osmosis system---
1) increased by one group of membrane element, and the model specification of pump, film has been done to definition and requirement;
2) use 2 groups of (rather than traditional one group) waste water controlling elementss, to realize the pressure-controlling to secondary film system;
3) there is the bypass design that the dense water of secondary is recycled;
4) increase inlet pressure indication and the anti-backflow device (check valve) of two-pass reverse osmosis film;
5) do not need special former water pre-treatment means (or filtrate).
Relatively traditional double-stage reverse osmosis system---
1) only have a topping-up pump, there is no two stage supercharging pump;
2) there is no middle water tank and the tank level control system thereof of producing;
3) film group is minimum, the first-stage reverse osmosis film group quantity of traditional way common 1.5 or 2 times to secondary film group;
4) there is no complicated flow regulating control system;
5) there is no middle water quality meter;
6) without PH, regulate or degas system (peer machine);
7) do not need special former water pre-treatment means (or filtrate).
Use abortion amount list pump type double-stage reverse osmosis system of the present invention, have the following advantages:
1) suitable with the simplest single the film single-stage reverse osmosis system of tradition on volume, hardware cost raising is no more than 15%, and completely compatible the most general pretreating scheme and universal accessories type;
2) tackling various former water conditions product water stablizes, through long-term checking, can under the more than 99% various municipal tap water condition of surpassing, guarantee to produce water and reach tri-grades of water quality standards of GB6682-(specific conductivity≤5us/cm), and steady in a long-term, the membrane module life-span is not less than 2-3 (under normally replacing condition of preprocessing filter element) conventionally; Solved conventional reverse osmosis system and must change the problem of technique when the diversified water condition of reply, meanwhile, also solved reverse osmosis produced water and only can using clearance and cannot guarantee the problem of water production rate index as index;
3) produce water water quality and significantly improve (take specific conductivity as example, its output pure water conductivity is than the low 50-90% of like product), can reduce by this consuming cost of back segment (take ion exchange resin as example) mixed bed even depth purifying filtrate to original 10-50%;
4) product water quality stabilizing is quick, can within the several seconds, reach standard the soonest, has significantly reduced the discharge of substandard product water;
5) the small capacity double level system that the rate of recovery is relatively traditional improves 30-50%, has improved utilization ratio, has significantly reduced the waste of water resources.
Accompanying drawing explanation
Fig. 1 is reverse osmosis system process flow diagram of the present invention.
Embodiment
Abortion amount list pump type double-stage reverse osmosis system as shown in Figure 1, this system comprises first-stage reverse osmosis film and the two-pass reverse osmosis film communicating.
Tap water (flow >=1.8LPM, pressure >=1bar) after pre-treatment (being generally the 5um polypropylene fibre winded filtering core+granulated active carbon filter core of effect in the phase) sequentially passes through source pressure inductive switch (low-tension switch), entering water electromagnetic valve.Again by entering level reverse osmosis membrane (25 ℃ of output 125GPD, rated operating pressure 50-60psi, ratio of desalinization >=96%) one by one after a topping-up pump (flow >=1.2LPM 7bar) supercharging.
On the dense water out pipeline of first-stage reverse osmosis film, a first class pressure table is installed, then be connected to an one-level waste water proportional valve (adjustable or fixing, kv=0.6LPM), after this one-level waste water proportional valve scouring electromagnetic valve in parallel, final dense water is discharged through concentrated water discharge mouth, and this scouring electromagnetic valve is for the flushing maintenance of start by set date reverse osmosis membrane.
The one-level pure water outlet conduit of first-stage reverse osmosis film connects a secondary pressure table, then via a check valve A, is connected to the water inlet of two-pass reverse osmosis film (25 ℃ of output 75GPD@, rated operating pressure 50-60psi, ratio of desalinization >=96%).
The waste water of two-pass reverse osmosis film sequentially through a secondary waste water proportional valve (fixed, kv=0.2LPM), a check valve B is back to topping-up pump water inlet and recycles.
Sequentially connect a check valve C, water quality measurement instrument (conductivitimeter) of the secondary pure water outlet conduit of two-pass reverse osmosis film carries out Quality Control, is then connected to and produces water quality control valve, and producing water quality control valve is a three-way diverter valve.Defective product water through the Quality Control of water quality measurement instrument will be gone to concentrated water discharge mouth from producing an outlet of water quality control valve, and qualified product water is by another outlet outflow according to via producing water quality control valve.
The key of abortion amount list pump type double-stage reverse osmosis system of the present invention is to select pump, the membrane element of coupling, set as requested the operating pressure of I and II reverse osmosis membrane simultaneously, conventionally the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.As select fixed waste water proportional valve, according to above-mentioned KV value condition, select suitable model so.The flushing maintenance shop of system recommendations moves unlatching in 3-4 hour once every being at least energising 12 hours/time or every accumulative total.
Claims (9)
1. abortion amount list pump type double-stage reverse osmosis system, is characterized in that: this system comprises first-stage reverse osmosis film and the two-pass reverse osmosis film communicating; Pretreated tap water connects first-stage reverse osmosis film through a topping-up pump; The dense water out pipeline of this first-stage reverse osmosis film is sequentially in series with 1 first class pressure table and 1 one-level waste water proportional valve, after this one-level waste water proportional valve scouring electromagnetic valve in parallel, connects concentrated water discharge mouth; The pure water outlet conduit of this first-stage reverse osmosis film is sequentially connected and is connected the water inlet of two-pass reverse osmosis film after 1 secondary pressure table, check valve A; The waste water of two-pass reverse osmosis film is back to topping-up pump water inlet through 1 secondary waste water proportional valve; The secondary pure water outlet conduit of the two-pass reverse osmosis film water quality measurement instrument and of sequentially connecting is produced water quality control valve, defective product water through the Quality Control of water quality measurement instrument is gone to concentrated water discharge mouth from producing an outlet of water quality control valve, and qualified product water flows out via another outlet of producing water quality control valve.
2. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 1, is characterized in that: between secondary waste water proportional valve and topping-up pump, be provided with a check valve B.
3. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 1 or 2, is characterized in that: between two-pass reverse osmosis film and water quality measurement instrument, be provided with a check valve C.
4. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 1 or 2, is characterized in that: produce between water quality control valve and concentrated water discharge mouth and be provided with a check valve D.
5. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 3, is characterized in that: produce between water quality control valve and concentrated water discharge mouth and be provided with a check valve D.
6. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 1 or 2, is characterized in that: the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.
7. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 3, is characterized in that: the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.
8. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 4, is characterized in that: the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.
9. abortion amount list pump type double-stage reverse osmosis system as claimed in claim 5, is characterized in that: the operating pressure of first-stage reverse osmosis film is set to 7.5-8bar, and the operating pressure of two-pass reverse osmosis film is set as 3.5-4bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210304335.3A CN103626311A (en) | 2012-08-24 | 2012-08-24 | Low-yield single-pump two-stage reverse osmosis system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210304335.3A CN103626311A (en) | 2012-08-24 | 2012-08-24 | Low-yield single-pump two-stage reverse osmosis system |
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| CN103626311A true CN103626311A (en) | 2014-03-12 |
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| CN201210304335.3A Pending CN103626311A (en) | 2012-08-24 | 2012-08-24 | Low-yield single-pump two-stage reverse osmosis system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860379A (en) * | 2014-11-19 | 2015-08-26 | 重庆摩尔水处理设备有限公司 | Novel pure water machine |
| CN105000698A (en) * | 2015-07-10 | 2015-10-28 | 沁园集团股份有限公司 | Reverse osmosis water purification and dispensing machine structure and energy saving method therefor |
| WO2015188776A1 (en) * | 2014-06-06 | 2015-12-17 | 王桂林 | Multi-stage reverse osmosis membrane device applied to sea water desalination |
| US10596520B2 (en) | 2016-06-13 | 2020-03-24 | Hitachi, Ltd. | Desalination apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2051128C1 (en) * | 1992-06-15 | 1995-12-27 | Научно-производственное объединение "Судоэкотехника" | Method for production of drinking water |
| CN2663401Y (en) * | 2003-12-12 | 2004-12-15 | 天津市海跃水处理高科技有限公司 | Integral two-stage reverse osmosis apparatus |
| CN200999216Y (en) * | 2007-01-26 | 2008-01-02 | 李伟 | Circulating type highly effective high-purity water purifier |
| CN202297285U (en) * | 2011-06-03 | 2012-07-04 | 上海瑞枫生物科技有限公司 | Medium-sized water saving type electrodeionization pure water supply system |
| CN202729915U (en) * | 2012-08-24 | 2013-02-13 | 岳勇斌 | Low-yield single-pump two-stage reverse osmosis system |
-
2012
- 2012-08-24 CN CN201210304335.3A patent/CN103626311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2051128C1 (en) * | 1992-06-15 | 1995-12-27 | Научно-производственное объединение "Судоэкотехника" | Method for production of drinking water |
| CN2663401Y (en) * | 2003-12-12 | 2004-12-15 | 天津市海跃水处理高科技有限公司 | Integral two-stage reverse osmosis apparatus |
| CN200999216Y (en) * | 2007-01-26 | 2008-01-02 | 李伟 | Circulating type highly effective high-purity water purifier |
| CN202297285U (en) * | 2011-06-03 | 2012-07-04 | 上海瑞枫生物科技有限公司 | Medium-sized water saving type electrodeionization pure water supply system |
| CN202729915U (en) * | 2012-08-24 | 2013-02-13 | 岳勇斌 | Low-yield single-pump two-stage reverse osmosis system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015188776A1 (en) * | 2014-06-06 | 2015-12-17 | 王桂林 | Multi-stage reverse osmosis membrane device applied to sea water desalination |
| CN104860379A (en) * | 2014-11-19 | 2015-08-26 | 重庆摩尔水处理设备有限公司 | Novel pure water machine |
| CN105000698A (en) * | 2015-07-10 | 2015-10-28 | 沁园集团股份有限公司 | Reverse osmosis water purification and dispensing machine structure and energy saving method therefor |
| US10596520B2 (en) | 2016-06-13 | 2020-03-24 | Hitachi, Ltd. | Desalination apparatus |
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Application publication date: 20140312 |