CN85105048A - Effluent brine reclaims and the recycle method - Google Patents
Effluent brine reclaims and the recycle method Download PDFInfo
- Publication number
- CN85105048A CN85105048A CN 85105048 CN85105048A CN85105048A CN 85105048 A CN85105048 A CN 85105048A CN 85105048 CN85105048 CN 85105048 CN 85105048 A CN85105048 A CN 85105048A CN 85105048 A CN85105048 A CN 85105048A
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- Prior art keywords
- nacl solution
- reclaims
- magnesium
- calcium
- naoh
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- 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.)
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- Treatment Of Water By Ion Exchange (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention announces a kind of method that makes the useless NaCl solution that produced be reclaimed and recycle in the softening treating processes of boiler feed water.The characteristics of this method are successively to drop into an amount of caustic soda (NaOH) and soda ash (Na in containing the useless NaCl solution of a large amount of calcium, magnesium ion
2CO
3), make to generate the magnesium hydroxide (Mg (OH) that purposes is arranged in addition respectively
2) and lime carbonate (CaCO
3), and obtain purified NaCl solution, and the latter is allocated by service requirements, promptly can be recycled.
Description
The present invention relates to a kind of: abraum salt solution reclaims and cyclic utilization method in the softening processing of boiler feed water, belongs to technical field of chemistry.
At the harder wide geographic area of water quality, boiler feed water must be softened processing, to guarantee safety, efficient and the steam quality of boiler.Present most of boiler feed water is all carried out water demineralization with resin, after resin lost efficacy through some cycles, must carry out manipulation of regeneration to it with sodium-chlor (NaCl) solution, handle a large amount of abraum salt solution that discharge the back, owing to contain the calcium of high density, magnesium ion can not remake the regeneration of resin agent, and existing treatment technology is to enter sewer line after its dilution.March 22 in 1984 day work people daily paper two thematic mails, proved this prior art, through the applicant consult, the patent searching document, not seeing has more advanced technological method.
The objective of the invention is: save salt and water resources, prevent the pollution of the environment.
The inventive method is achieved in that
One, total hardness in the mensuration abraum salt solution and calcium, the muriatic content of magnesium.
Two,, add quantitative caustic soda (NaOH) by the demand of following this formula according to the total hardness value
Formula is:
Effluent brine needs=(hard (ppm) * 3.4 of magnesium * (1+10%) n)/1000
The NaOH(kilogram)
N represents abraum salt amount (ton) in the formula, and 3.4 is the empirical constant of NaOH
Stirred after adding caustic soda, make the magnesium hydrate precipitate of generation, its chemical formula is as follows:
Three, after whizzer gets rid of filter, handle through vacuum, suction strainer again, magnesium hydroxide is separated from solution fully.
Four,, add quantitative soda ash (Na by the demand of following this formula again according to the total hardness value
2CO
3).
Formula is:
Effluent brine needs=(hard (ppm) * 1.2 of calcium * (1+10%) n)/1000
Yellow soda ash (kilogram)
N represents abraum salt amount (ton) in the formula, the empirical constant of 1.2 expression yellow soda ash.
Stirred again after adding soda ash, made the generation precipitation of calcium carbonate.Its chemical formula is as follows:
Five, after whizzer gets rid of filter, handle through vacuum, suction strainer again, make the complete and solution separating of lime carbonate.
Six, the purified sodium chloride solution of gained is allocated its concentration according to the service requirements of regenerating resin, can drop into to recycle.
The present invention compared with prior art has following positively effect:
One, salt and water resources have been saved;
Two, eliminated abraum salt solution to the pollution of environment with to the harm of farm crop.
Other advantage that the present invention has is:
One, method is easy, and required equipment is simple;
Two, no waste generates, and gained lime carbonate and magnesium hydroxide be capable of using as feed and industrial chemicals respectively.
Three, desired raw material caustic soda and soda ash are cheap, and available spent caustic and spent soda replacement, and is for the user who has caustic soda and soda ash to generate as waste material, particularly suitable.
Four, use the resulting pure sodium chloride solution of present method, can reach the standard of no calcium, magnesium hardness.
The detailed process of invention is drawn by accompanying drawing.
Below in conjunction with description of drawings process of the present invention:
I-show adds effluent brine II-show to add NaOH solution
III-show to add Na
2CO
3Solid IV-show adding temper
1 and 2 is retort, and 3 is Mixer pot, 4 and 6 expression whizzers, and 5 and 7 is hay tank.
Claims (2)
1, the total hardness in the mensuration abraum salt solution and the content of magnesium add quantitative caustic soda [NaOH] and get rid of filter, after vacuum, suction strainer are handled, produce magnesium hydroxide [Mg (OH) again
2] throw out.
2, measure the total hardness in the abraum salt solution and the content of calcium again, add quantitative soda ash (Na
2CO
3) get rid of filter, again after vacuum, suction strainer are handled, produce lime carbonate (CaCO
3) throw out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105048A CN85105048B (en) | 1985-07-04 | 1985-07-04 | Method of recovery and circulating use of waste brine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105048A CN85105048B (en) | 1985-07-04 | 1985-07-04 | Method of recovery and circulating use of waste brine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105048A true CN85105048A (en) | 1986-12-31 |
| CN85105048B CN85105048B (en) | 1988-05-25 |
Family
ID=4794225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105048A Expired CN85105048B (en) | 1985-07-04 | 1985-07-04 | Method of recovery and circulating use of waste brine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85105048B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009987A (en) * | 2010-12-02 | 2011-04-13 | 河南神马氯碱化工股份有限公司 | Brine refining process for removing calcium and magnesium by one step |
| CN102372375A (en) * | 2010-08-27 | 2012-03-14 | 中国石油化工股份有限公司 | Advanced wastewater hardness removal method |
| CN104528986A (en) * | 2014-12-10 | 2015-04-22 | 深圳能源资源综合开发有限公司 | Total hardness removal treatment system and method for garbage leachate |
| CN106315919A (en) * | 2016-09-23 | 2017-01-11 | 中国神华能源股份有限公司 | Wastewater hardness lowering device and wastewater treatment system comprising same |
| CN106467314A (en) * | 2016-10-12 | 2017-03-01 | 北京高能时代环境技术股份有限公司 | Prepare light magnesium oxide and the technique of micron order calcium carbonate powder using bitter alkali water |
-
1985
- 1985-07-04 CN CN85105048A patent/CN85105048B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372375A (en) * | 2010-08-27 | 2012-03-14 | 中国石油化工股份有限公司 | Advanced wastewater hardness removal method |
| CN102372375B (en) * | 2010-08-27 | 2013-09-25 | 中国石油化工股份有限公司 | Advanced wastewater hardness removal method |
| CN102009987A (en) * | 2010-12-02 | 2011-04-13 | 河南神马氯碱化工股份有限公司 | Brine refining process for removing calcium and magnesium by one step |
| CN104528986A (en) * | 2014-12-10 | 2015-04-22 | 深圳能源资源综合开发有限公司 | Total hardness removal treatment system and method for garbage leachate |
| CN106315919A (en) * | 2016-09-23 | 2017-01-11 | 中国神华能源股份有限公司 | Wastewater hardness lowering device and wastewater treatment system comprising same |
| CN106467314A (en) * | 2016-10-12 | 2017-03-01 | 北京高能时代环境技术股份有限公司 | Prepare light magnesium oxide and the technique of micron order calcium carbonate powder using bitter alkali water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105048B (en) | 1988-05-25 |
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