CN103288239A - Preparation method of ultrapure water - Google Patents
Preparation method of ultrapure water Download PDFInfo
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- CN103288239A CN103288239A CN2013102291651A CN201310229165A CN103288239A CN 103288239 A CN103288239 A CN 103288239A CN 2013102291651 A CN2013102291651 A CN 2013102291651A CN 201310229165 A CN201310229165 A CN 201310229165A CN 103288239 A CN103288239 A CN 103288239A
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Abstract
The invention discloses a preparation method of ultrapure water, belongs to the technical field of sewage treatment and pure water manufacturing and adopts a process method combining ultrafiltration, reverse osmosis, a cation bed, an anion bed and a mixed bed. According to the preparation method, the equipment investment is decreased by 30%; the land occupation is saved by 20%; the used amount of acid and alkali is only 3% of that of the original ion exchange technology; the operating cost is the same as that of the whole membrane technology; meanwhile, good environmental benefits are obtained.
Description
Technical field
The invention belongs to sewage disposal, pure water manufacturing technology field.
Background technology
Film desalting technology and ion exchange technique are present pure water preparation field major techniques, are widely used in the various water technologies.Ion exchange technique has the advantages that investment is low, operation easier is little, running cost is not high.Main drawback is, ion-exchange need be regenerated after losing efficacy, and used regenerator is generally industrial strong acid, highly basic such as hydrochloric acid, sodium hydroxide, sulfuric acid, and there are certain hidden danger in environment, personal security.How improving the cycle of operation of ion-exchange unit, reduce acid and alkali consumption, is the main difficulty that ion exchange technique faces.Membrane technique mainly comprises filtration and desalination membrane elements such as ultrafiltration, reverse osmosis, EDI, has the advantage that floor space is little, easy to operate, environmental pollution is little, running cost is low, but also exists the high shortcoming of facility investment.
Ion exchange technique is subjected to the restriction of ion exchange capacity of resin, needs after the operational failure to regenerate, and this process need mass consumption soda acid is suitable for handling the lower water of saltiness, is suitable for the advanced desalination technology of pure-water producing process.
Reverse osmosis technology has constant ratio of desalinization, produces water quality stabilizing, is suitable for the high-content water body, is suitable for the pre-desalinating process of pure-water producing process.
The water treatment ion exchange technique has strong type resin bed, weak type resin bed, lifted bed, double, mixes bed etc.The preparation high purity water need adopt mixed bed technique.Mixed bed technique has the filtering velocity height, produces the good characteristics of water water quality, also has influent quality requirement height, and therefore the shortcoming that exchange capacity is low needs preposition sun bed+cloudy bed to carry out pre-treatment.
Summary of the invention
How in design pure water indexes technology, can reach that investment is low, running cost is low, environmental pollution is little, save take up an area of, safety simple to operate is the developing direction of pure water preparation technology.
The present invention adopts ultrafiltration+reverse osmosis+sun bed+cloudy bed+mixed bed process.
Described ultrafiltration is exactly the ultra-filtration membrane screening process, pressure difference with the film both sides is motivating force, be filtration medium with the ultra-filtration membrane, under certain pressure, when stoste flow through the film surface, the many tiny micropore that gathers in the ultra-filtration membrane surface only allowed water and small-molecule substance by becoming through liquid, and volume then is trapped within the liquid feeding side of film in the stoste greater than the material in film surface micropore footpath, become concentrated solution, thereby realize purification, separation and concentrated purpose to stoste.
Ultra-filtration membrane comprises cellulose acetate membrane, polysulfone membrane, polyamide membrane.
Ultra-filtration equipment comprises plate and frame, tubular type, rolling and tubular fibre formula.
The ultrafiltration technology parameter:
Be 0.11～0.6Mpa at working pressure, temperature is during less than 60 ℃, and the membrane flux of ultra-filtration membrane is advisable with 1～500L/m2h.The factor that influences membrane flux has: water inlet flow velocity, working pressure, temperature, influent concentration and former water pretreatment etc.
The necessary routine cleaning of film, to prolong the life-span of film, the life-span of the normal film that uses is 12～18 months.
DescribedSun bed, i.e. cation exchanger, Cation exchanger(CE), be also referred to as pressure filter.
Strainer comprises natural quartz sand filter, more medium filter, activated charcoal filter, filtration with manganese sand device; Water intake mode comprises single current strainer, double-current method strainer.The medium of more medium filter is quartz sand, hard coal.Function is filtering suspended substance, mechanical impurity, organism etc., reduces the opacity of water.The charcoal filter medium is activated carbon, and purpose is absorption, remove pigment in the water, organism, chlorine residue, colloid etc.The medium of filtration with manganese sand device is manganese sand, mainly removes the ferrous ion in the water.
Sun bed process flow process be exhaust → small reverse washing → big reverse washing (only be used for ten all after dates of operation, before each big reverse washing small reverse washing once, with loosening packed resin layer) → acid → displacement → exhaust that discharges water → pilot injection → advance → little just washes → greatly just washes.
Described cloudy bed is Na-ion exchanger.Ion exchange column (device) shell generally adopts rigid polyvinyl chloride (PVC), rigid polyvinyl chloride composite glass fiber reinforced (PVC-FRP), synthetic glass (PMMA), synthetic glass composite transparent glass reinforced plastic (PMMA-FRP), steel lining glue (JR), stainless steel line with rubber material.
Mixed bed is that anion-cation exchange resin is seated in the same ion-exchanger by certain blending ratio, because H ion and OH ion that hybrid ionic exchanges in the laggard entry generate the very low water molecules of degree of ionization immediately, can make permutoid reaction carry out very thoroughly.Mixed bed is generally positioned at after the multiple bed of one-level, to the processing that is further purified of water quality.
The pre-desalting technology of the present invention (1) ultrafiltration+reverse osmosis, ratio of desalinization height, product water quality stabilizing.(2) the ion-exchange unit cycle of operation surpasses 30 days, and acid and alkali consumption has only pure ion exchange technique to reduce by 3%.(3) the soda acid quantity discharged reduces, and good benefits in environment is arranged.(4) the full membrane process craft of facility investment reduces by 30%.(5) equipment takes up an area of has increase slightly than membrane technique, declines to a great extent than ion exchange technique.
Embodiment
The 3rd row of above table and the unit of the 6th row all are mg/l; The unit of the 4th row and the 7th row all is mmol/l.
Adopt ultrafiltration+reverse osmosis+sun bed+cloudy bed+mixed bed process to prepare the water of the parameter in the above table.
Claims (1)
1. ultrapure water preparation method, adopt the processing method of a ultrafiltration+reverse osmosis+sun bed+cloudy bed+mix bed, the ultrapure water of the described parameter of following table of system:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102291651A CN103288239A (en) | 2013-06-09 | 2013-06-09 | Preparation method of ultrapure water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102291651A CN103288239A (en) | 2013-06-09 | 2013-06-09 | Preparation method of ultrapure water |
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| CN103288239A true CN103288239A (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102291651A Pending CN103288239A (en) | 2013-06-09 | 2013-06-09 | Preparation method of ultrapure water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496806A (en) * | 2013-10-15 | 2014-01-08 | 中国华电工程(集团)有限公司 | System and method for manufacturing demineralized water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765760A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Terephthalic acid production waste water disposal method |
| US20070131621A1 (en) * | 2005-12-14 | 2007-06-14 | Denton Mark S | Method and system for treating radioactive waste water |
| CN202829750U (en) * | 2012-10-18 | 2013-03-27 | 北京建筑工程学院 | Comprehensive experimental device of desalting system |
-
2013
- 2013-06-09 CN CN2013102291651A patent/CN103288239A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765760A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Terephthalic acid production waste water disposal method |
| US20070131621A1 (en) * | 2005-12-14 | 2007-06-14 | Denton Mark S | Method and system for treating radioactive waste water |
| CN202829750U (en) * | 2012-10-18 | 2013-03-27 | 北京建筑工程学院 | Comprehensive experimental device of desalting system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496806A (en) * | 2013-10-15 | 2014-01-08 | 中国华电工程(集团)有限公司 | System and method for manufacturing demineralized water |
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Application publication date: 20130911 |