CN103570044A - Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate - Google Patents
Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate Download PDFInfo
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- CN103570044A CN103570044A CN201310501291.8A CN201310501291A CN103570044A CN 103570044 A CN103570044 A CN 103570044A CN 201310501291 A CN201310501291 A CN 201310501291A CN 103570044 A CN103570044 A CN 103570044A
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- carbonate
- bicarbonate
- ammonium sulfate
- ammonia
- sodium sulfate
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Abstract
The invention provides a method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate. According to the method, the ammonium sulfate in the waste mixed liquid can be completely turned into sodium sulfate; and after ammonium carbonate is volatilized, the ammonium carbonate is collected again so s to obtain byproduct ammonium carbonate (or ammonium bicarbonate). According to the method, the problem that ammonium sulfate and sodium sulfate are difficult to separate is solved and the profit can be obtained.
Description
Technical field
The present invention relates to a kind of method with processes of carbonate treatment sodium sulfate ammonium sulfate mixed waste liquor.
Background technology
In a lot of industrial production, produced a large amount of sodium sulfate and ammonium sulfate waste water, such waste water can not recycle, can not directly discharge, so far still without effective treating method.Such as the aqueous solution after the vanadium chromium precipitation of domestic certain company contains a large amount of sodium sulfate and ammonium sulfate, all the time cannot low-cost separation sodium sulfate and ammonium sulfate.In order not produce waste, after evaporate to dryness, mixing slag is freely transported to other companies and produces other products.This has not only wasted the transportation energy, and has wasted resource.
At present a lot of for such method for waste water, such as the separated ammonium sulfate of fractional crystallization and ammonium sulfate, but final sodium sulfate cannot be separated with ammonium sulfate formation double salt, and the large water gaging of the method consumption, and energy consumption is large.The method also having is such as adding alkali (sodium hydroxide) stripping, and this method not only needs expensive sodium hydroxide but also the ammonia that need to produce by sulfuric acid absorption, and this method can not be removed ammonium radical ion completely.Therefore, current low-cost convenient disposal sodium sulfate and ammonium sulfate mixture become a difficult problem of many enterprises.
Summary of the invention
The object of the invention is to address the above problem, provide a kind of and neither can produce pollution, can not produce high processing costs again environment, and can reclaim the treatment process that obtains sodium sulfate in high purity and volatile salt (or bicarbonate of ammonia).
To achieve these goals, the invention provides a kind of method with processes of carbonate treatment sodium sulfate ammonium sulfate mixed waste liquor, the method comprises:
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with carbonate, and be heated to certain temperature reaction, insulation certain hour, till the volatile salt (or bicarbonate of ammonia) that ammonium sulfate and carbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) volatilization gas is cooled, and tail gas is passed in water.
According to the method with processes of carbonate treatment sodium sulfate ammonium sulfate mixed waste liquor of the present invention, can not only low-cost processes mixed solution and can obtain sodium sulfate and the volatile salt (or bicarbonate of ammonia) that purity is higher.The present invention is not environmental emission waste residue waste gas, is a kind for the treatment of process of green.
Embodiment
The method of processes of carbonate treatment sodium sulfate ammonium sulfate mixed waste liquor for the present invention, it comprises:
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with carbonate, and be heated to certain temperature reaction, insulation certain hour, till the volatile salt (or bicarbonate of ammonia) that ammonium sulfate and carbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) volatilization gas is cooled, and tail gas is passed in water.
Below in conjunction with specific examples, the present invention is described in detail.
Example 1
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with appropriate sodium carbonate, and be heated to 300 ℃, be incubated 0.5 hour, till the volatile salt that ammonium sulfate and carbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) volatilization gas is cooled, and tail gas is passed in water.In the sodium sulfate obtaining, N content is 0.001%.And N content in tail gas clean-up water just equals the N content in untreated refuse.
Example 2
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with appropriate sodium bicarbonate, and be heated to 150 ℃, be incubated 4 hours, till the bicarbonate of ammonia that ammonium sulfate and sodium bicarbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) volatilization gas is cooled, and tail gas is passed in water.In the sodium sulfate obtaining, N content is almost nil.And N content in tail gas clean-up water just equals the N content in untreated refuse.
Example 3
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with appropriate calcium carbonate, and be heated to 450 ℃, be incubated 0.5 hour, till the volatile salt that ammonium sulfate and calcium carbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) volatilization gas is cooled, and tail gas is passed in water.In the sodium sulfate that the slag water dissolution filter crystallization of not volatilization is obtained, N content is zero.And N content in tail gas clean-up water just equals the N content in untreated refuse.
Example 4
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with appropriate Calcium hydrogen carbonate, and be heated to 300 ℃, be incubated 1 hour, till the volatile salt that ammonium sulfate and Calcium hydrogen carbonate are generated volatilizees completely.Meanwhile, bicarbonate of ammonia volatilization gas is cooled, and tail gas is passed in water.In the sodium sulfate that the slag water dissolution filter crystallization of not volatilization is obtained, N content is zero.And N content in tail gas clean-up water just equals the N content in untreated refuse.
Claims (6)
1. by a method for processes of carbonate treatment sodium sulfate ammonium sulfate mixed waste liquor, the method comprises:
Waste residue after waste liquid enriched material or waste liquid evaporate to dryness is evenly mixed with carbonate, and be heated to certain temperature reaction, insulation certain hour, till the volatile salt (or bicarbonate of ammonia) that ammonium sulfate and carbonate are generated volatilizees completely.Meanwhile, volatile salt (or bicarbonate of ammonia) body of can getting angry is cooled, and tail gas is passed in water.After the slag water dissolution filter crystallization of volatilization, be not more than 99.5% sodium sulfate of purity.
2. method according to claim 1, described carbonate is to react with ammonium sulfate the carbonate that produces volatile salt or bicarbonate of ammonia, the add-on of carbonate is for just to react and to be advisable with ammonium radical ion contained in refuse.
3. method according to claim 1, described carbonate is at least one in sodium carbonate, sodium bicarbonate, calcium carbonate and Calcium hydrogen carbonate.
4. according to the method described in claim 1, wherein temperature of reaction is between 70 ℃～500 ℃.
5. method according to claim 1, soaking time is more than 0.5 hour.
6. method according to claim 1, by product is volatile salt, bicarbonate of ammonia or two kinds of mixtures that material has.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501291.8A CN103570044A (en) | 2013-10-23 | 2013-10-23 | Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310501291.8A CN103570044A (en) | 2013-10-23 | 2013-10-23 | Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate |
Publications (1)
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| CN103570044A true CN103570044A (en) | 2014-02-12 |
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| CN201310501291.8A Pending CN103570044A (en) | 2013-10-23 | 2013-10-23 | Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665546A (en) * | 2018-12-27 | 2019-04-23 | 大连博融新材料有限公司 | A kind of de- ammonium technique of ammoniated wastewater |
| CN113493214A (en) * | 2020-04-08 | 2021-10-12 | 郑州奥罗拉环保科技有限公司 | Novel method for preparing sodium bicarbonate and co-producing ammonium sulfate from sodium sulfate |
| CN114349028A (en) * | 2021-11-29 | 2022-04-15 | 攀钢集团研究院有限公司 | Method for resource utilization of vanadium precipitation wastewater |
| CN115010149A (en) * | 2022-07-12 | 2022-09-06 | 郑州中科新兴产业技术研究院 | Method for recycling sodium sulfate and ammonium sulfate from mixed salt |
-
2013
- 2013-10-23 CN CN201310501291.8A patent/CN103570044A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665546A (en) * | 2018-12-27 | 2019-04-23 | 大连博融新材料有限公司 | A kind of de- ammonium technique of ammoniated wastewater |
| CN113493214A (en) * | 2020-04-08 | 2021-10-12 | 郑州奥罗拉环保科技有限公司 | Novel method for preparing sodium bicarbonate and co-producing ammonium sulfate from sodium sulfate |
| CN113493214B (en) * | 2020-04-08 | 2022-08-23 | 北京镜澄科技有限公司 | Novel method for preparing sodium bicarbonate and co-producing ammonium sulfate from sodium sulfate |
| CN114349028A (en) * | 2021-11-29 | 2022-04-15 | 攀钢集团研究院有限公司 | Method for resource utilization of vanadium precipitation wastewater |
| CN115010149A (en) * | 2022-07-12 | 2022-09-06 | 郑州中科新兴产业技术研究院 | Method for recycling sodium sulfate and ammonium sulfate from mixed salt |
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Application publication date: 20140212 |