CN1683252A - Process for refining super filter and secondary reverse osmosis high purity water - Google Patents
Process for refining super filter and secondary reverse osmosis high purity water Download PDFInfo
- Publication number
- CN1683252A CN1683252A CN 200510049194 CN200510049194A CN1683252A CN 1683252 A CN1683252 A CN 1683252A CN 200510049194 CN200510049194 CN 200510049194 CN 200510049194 A CN200510049194 A CN 200510049194A CN 1683252 A CN1683252 A CN 1683252A
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- water
- stage
- high purity
- osmosis device
- 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.)
- Pending
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The high purity water preparing process includes pre-treatment of raw water in a pre-treating apparatus, reverse osmosis in the first stage of reverse osmosis apparatus and reverse osmosis in the second stage of reverse osmosis apparatus. The pre-treating apparatus is one ultrafiltering device, and the concentrated water from the second stage of reverse osmosis apparatus is back flowed partially to the first stage of high pressure water tank or water inlet and partially to the second stage of high pressure water tank or water inlet. The present invention has pure water product with conductivity of 1 microsiemen/cm and less blocking, high water utilization and other advantages.
Description
Technical field
The present invention relates to a kind of technology of utilizing ultrafiltration and reverse osmosis membrane processing to produce pure water.
Background technology
At present, the two-pass reverse osmosis legal system is got pure water technology, with outstanding advantages such as its environmental protection, full-automatic running, stable effluent quality, obtained using widely in industries such as beverage, chemical industry, electric power, electronics, but existing two-pass reverse osmosis method pure water preparation technology also has the some shortcomings part, for example, produce electrical conductivity of water and can only reach 2～10 μ s/cm; It is low that former water use efficiency is also owed; Former water pretreatment operation in its technological process adopts washed ore filtration, activated carbon filtration and accurate filter to filter mostly, above-mentioned pretreatment unit is not only bulky, operation is complicated, the working cost height, and Yuan Shui contain pollutent more, when water quality is relatively poor, often be difficult to reach the specification of quality of pretreated water, thereby easily make reverse osmosis membrane contaminated and reduction of service life.
Summary of the invention
The technical problem that quasi-solution of the present invention is determined, be that existing two-pass reverse osmosis pure water preparation technology is carried out technological improvement, thereby a kind of water quality stabilizing, water conductivity≤1 μ s/cm and former water use efficiency height, convenient operation and management, two-pass reverse osmosis pure water preparation technology that operational efficiency is high of producing is provided.
Technical solution of the present invention is: it comprises that former water is after pretreatment unit is handled, produce high purity water by first-stage reverse osmosis device and two-pass reverse osmosis device continuously, and described pretreatment unit is a ultra-fine filter, the dense water of two-pass reverse osmosis device output passes through return line, some is back to preceding water storage tank of secondary high-pressure pump or secondary high-pressure pump water inlet pipe, and some is back to preceding water storage tank of one-level high-pressure pump or one-level high-pressure pump water inlet pipe.
In addition, the two-pass reverse osmosis device is sent in the water outlet of first-stage reverse osmosis device again after adding alkali.
The invention has the beneficial effects as follows: through facts have proved, use this technology, the dirt-block modulus SDI value of pretreated water can remain on below 3, and the specific conductivity of output pure water can be stabilized in below the 1 μ s/cm, former water use efficiency improves more than 10%, and reverse osmosis membrane prolongs more than 20% work-ing life.And device volume dwindles 1/3, and easy operation has reduced working cost.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention
Embodiment
The invention will be further described with embodiment below in conjunction with accompanying drawing.
Former water (city tap-water) 1 sent into ultra-fine filter 3 by pipeline 2, ultrafiltration water after ultra-fine filter filters is sent to ultrafiltration water storage tank 5 by pipeline 4, the import of one-level high-pressure pump 7 is connected with ultrafiltration water storage tank outlet pipe 6, outlet is connected with the inlet pipe 8 of first-stage reverse osmosis device 9, output water after first-stage reverse osmosis device 9 is handled is sent into intermediate water tank 13 by pipeline 10, by alkali lye volume pump 12 the NaOH solution in the lye vat 11 is added intermediate water tank 13 by a certain percentage simultaneously, the import of secondary high-pressure pump 15 is connected with intermediate water tank outlet pipe 14, outlet is connected with the water inlet pipe 16 of two-pass reverse osmosis device 17, output water after two-pass reverse osmosis device 17 is handled is finished product water, be sent to finished product pure water storage tank by pipeline 18, and the dense water of two-pass reverse osmosis device 17, some is back to secondary high-pressure pump 15 inlet pipes by concentrate recirculation pipe 19, and some is back to ultrafiltration water storage tank 5 by concentrate recirculation pipe 19.
The ultra-fine filter 3 that the present invention adopts is made up of ultrafiltration membrane elements and corresponding pipe arrangement, it is simple and compact for structure, more traditional filtration unit volume-diminished 1/3, and it is easy and simple to handle, the quality of pretreated water also improves greatly, the SDI value that can stably keep pretreated water is below 3, thereby the prolongation reverse osmosis membrane is work-ing life more than 20%.The present invention adds alkali lye before two-pass reverse osmosis device 17 be in order suitably to improve the pH value of water inlet, the first-stage reverse osmosis device is produced a small amount of CO2 that exists in the water be converted into the HCO3-negatively charged ion, favourablely in two-pass reverse osmosis, remove, and the dense moisture two tunnel of two-pass reverse osmosis device refluxes, can improve two-pass reverse osmosis film surface velocity on the one hand, reduce concentration polarization, reduce the water rate of recovery of second stage reverse osmosis unit film, thereby improve the film ratio of desalinization, improve effluent characteristics, facts have proved that the specific conductivity of this technology output pure water is below 1 μ s/cm, and the specific conductivity of traditional technology output pure water is 2～10 μ s/cm; Because the dense water ph value of secondary is higher, can improve the water inlet pH value of two-pass reverse osmosis device after partly refluxing on the other hand, reduce the injected volume of alkali lye, save cost.
Claims (2)
1, a kind of ultrafiltration and secondary reverse osmosis high purity water process for refining, comprise that former water is behind pretreatment unit, produce high purity water by first-stage reverse osmosis device and two-pass reverse osmosis device continuously, it is characterized in that described pretreatment unit is a ultra-fine filter, the dense water of two-pass reverse osmosis device output passes through return line, some is back to preceding water storage tank of secondary high-pressure pump or secondary high-pressure pump water inlet pipe, and some is back to preceding water storage tank of one-level high-pressure pump or one-level high-pressure pump water inlet pipe.
2, by described ultrafiltration of claim 1 and secondary reverse osmosis high purity water process for refining, it is characterized in that the two-pass reverse osmosis device is sent in the water outlet of first-stage reverse osmosis device again after adding alkali.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049194 CN1683252A (en) | 2005-03-03 | 2005-03-03 | Process for refining super filter and secondary reverse osmosis high purity water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049194 CN1683252A (en) | 2005-03-03 | 2005-03-03 | Process for refining super filter and secondary reverse osmosis high purity water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1683252A true CN1683252A (en) | 2005-10-19 |
Family
ID=35262784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510049194 Pending CN1683252A (en) | 2005-03-03 | 2005-03-03 | Process for refining super filter and secondary reverse osmosis high purity water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1683252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215023B (en) * | 2008-01-17 | 2010-06-02 | 张文波 | Reverse osmosis water purification treatment technology |
| CN101139144B (en) * | 2007-08-16 | 2012-05-23 | 瓮福（集团）有限责任公司 | Method for processing acidity ammonium nitrogen wastewater in fertilizer plant by using membrane separation |
| CN113045020A (en) * | 2021-04-06 | 2021-06-29 | 北京康安高分子开发中心 | Two-stage reverse osmosis water purifier |
-
2005
- 2005-03-03 CN CN 200510049194 patent/CN1683252A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139144B (en) * | 2007-08-16 | 2012-05-23 | 瓮福（集团）有限责任公司 | Method for processing acidity ammonium nitrogen wastewater in fertilizer plant by using membrane separation |
| CN101215023B (en) * | 2008-01-17 | 2010-06-02 | 张文波 | Reverse osmosis water purification treatment technology |
| CN113045020A (en) * | 2021-04-06 | 2021-06-29 | 北京康安高分子开发中心 | Two-stage reverse osmosis water purifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202688148U (en) | Electroplating wastewater treatment and recycling system | |
| CN101428913A (en) | Reverse osmosis water production process | |
| CN201074253Y (en) | Recycling plant for electroplating cyanide-containing waste water | |
| CN202729915U (en) | Low-yield single-pump two-stage reverse osmosis system | |
| CN1683252A (en) | Process for refining super filter and secondary reverse osmosis high purity water | |
| CN104291486A (en) | High-power reuse technology for coal chemical industry strong brine and special equipment of high-power reuse technology | |
| CN104418465A (en) | Landfill leachate treatment method and equipment | |
| CN201520680U (en) | Advanced treatment device for printing and dyeing waste water | |
| CN211734028U (en) | Reverse osmosis device with high recovery rate | |
| CN201901618U (en) | Nickel plating wastewater treatment and recycle device | |
| CN203668153U (en) | Recycling system device for printing and dyeing production wastewater | |
| CN201942582U (en) | Metallurgy waste water treatment device | |
| CN201380045Y (en) | Pretreatment device and reverse osmosis desalination apparatus for desalination of mine water | |
| CN203653348U (en) | High recovery rate reverse osmosis wastewater treatment device | |
| CN2782665Y (en) | Two-stage reverse osmosis water purifier for prenltrafilter | |
| CN210193476U (en) | Reverse osmosis water purification system and water purification unit | |
| CN109621727B (en) | Ultra-low pressure reverse osmosis system and method for treating iodine ions in radioactive polluted water by using same | |
| CN219194605U (en) | High-efficient reverse osmosis dense water recovery structure | |
| CN208762281U (en) | A kind of device with Integrated Membrane Technology processing rare-earth smelting high ammonia-nitrogen wastewater | |
| CN201106070Y (en) | Device for reusing electroplating wastewater by using integrated membrane | |
| CN2494822Y (en) | Secondary reverse osmosis water purifier | |
| CN201596467U (en) | Concentrated water reuse system for reverse osmosis unit | |
| CN201737793U (en) | Mixed electroplating waste water regenerating and recycling device | |
| CN220214510U (en) | Biogas slurry recycling classification recovery system | |
| CN221370933U (en) | Second grade reverse osmosis dense water recycle device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |