CN103318923A - Method for recovering sodium sulfate from white carbon black mother solution - Google Patents
Method for recovering sodium sulfate from white carbon black mother solution Download PDFInfo
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- CN103318923A CN103318923A CN2013102201157A CN201310220115A CN103318923A CN 103318923 A CN103318923 A CN 103318923A CN 2013102201157 A CN2013102201157 A CN 2013102201157A CN 201310220115 A CN201310220115 A CN 201310220115A CN 103318923 A CN103318923 A CN 103318923A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a method for recovering sodium sulfate from a white carbon black mother solution, and the white carbon black mother solution is generated during production of white carbon black produced by a precipitation method. The method comprises the steps of: (1) preliminary filtration, (2) evaporation and concentration, (3) precision filtration, (4) evaporation and crystallization, and (5) centrifugation, wherein the evaporation and the concentration of the step (2) are carried out in a hot-blast-stove tail-gas water-film de-dusting tower, and the evaporation and the concentration are carried out utilizing waste heat of hot-blast-stove tail gas generated during production of white carbon black produced by a precipitation method. A sodium sulfate solution which is used for hot-blast-stove tail-gas water-film de-dusting replaces process water, so that process water is saved; evaporation and concentration of the sodium sulfate solution are carried out utilizing waste heat of hot-blast-stove tail gas, so that recovering sodium sulfate from the sodium sulfate solution which is a byproduct of white carbon black becomes an economical method; the sodium sulfate solution which is a byproduct generated during the production of white carbon black is employed as tail-gas water-film de-dusting water of white carbon black drying hot-blast stove, evaporation and concentration of the sodium sulfate solution are carried out utilizing waste heat of hot-blast-stove tail gas, and then anhydrous sodium sulfate is produced; and energy consumption is reduced, so that double advantages are achieved.
Description
Technical field
The present invention relates to Preparation of White Carbon Black technology and related process thereof, relate in particular to sodium sulfate recovery method in a kind of white carbon black mother liquor.
Background technology
Sodium sulfate claims Sodium sulfate anhydrous.min(99) again, is a kind of basic chemical raw materials.Be widely used in sodium sulphite processed, paper pulp, glass, water glass, enamel, also be used as the toxinicide of laxative and barium salt poisoning etc.Sector application:
1, chemical industry is as making sodium sulphite sodium silicate water glass and other Chemicals.
2, the stopping composition of the industrial synthetic detergent of washing.
Steaming-boiling agent when 3, paper industry is for the manufacture of sulfate pulping.
4, glass industry is made solubility promoter in order to replace soda ash.
5, textile industry is used for allotment vinylon spinning peptizer.
6, be used for aspects such as Non-ferrous Metallurgy, leather.
Industrial field, beach method, mechanical refrigeration method, the salt lake synthetic method of adopting produced sodium sulfate.
It is a large amount of metabisulfite solution of by-product in the precipitated silica production process of raw material with water glass and sulfuric acid.But produce 0.7 ton of sodium sulfate of one ton of white carbon black by-product.
Generally from chemical industry by-product metabisulfite solution, produce sodium sulfate and adopt the mechanical refrigeration method more.The report that adopts electrodialysis concentrated vitriol sodium solution is also arranged.
The metabisulfite solution concentration of by-product is lower in the carbon white production process, generally between 4-8%.Because energy consumption is big, mechanical refrigeration method and electrodialysis method of enrichment are difficult to realize.
Summary of the invention
Goal of the invention of the present invention is that sodium sulfate recovery method in a kind of white carbon black mother liquor that a kind of energy consumption is little, production is easy is provided.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is:
Sodium sulfate recovery method in a kind of white carbon black mother liquor, described white carbon black mother liquor is to produce in the precipitated silica production process, may further comprise the steps:
1) the preliminary filtration: white carbon black thin pulp solid-liquid separation is obtained the white carbon black mother liquor, and the mass percent of contains sodium sulfate is 4-8% in the mother liquor;
2) evaporation concentration: the metabisulfite solution that filtration is obtained 4-8% carries out evaporation concentration, reaches the 20-23 degree Beaume until metabisulfite solution concentration;
3) secondary filter: the sodium sulfate refined soln that the metabisulfite solution secondary filter that concentrates is obtained the 20-23 degree Beaume;
4) evaporative crystallization: be that the sodium sulfate refined soln of 20-23 degree Beaume carries out evaporative crystallization with concentration, make anhydrous sodium sulphate;
5) centrifugation: the anhydrous sodium sulphate that crystallization generates is separated by automatic discharge centrifuge, and mother liquor returns the continuation condensing crystal.
Wherein,
Step 2) evaporation concentration is to carry out in hotblast stove tail gas water film dedusting tower, and utilizes the waste heat of hotblast stove tail gas in the precipitated silica production process to carry out evaporation concentration.
In order to realize rapid crystallization, step 4) of the present invention is to adopt the multiple-effect evaporation crystallizer that metabisulfite solution is carried out evaporative crystallization.
In order more to take full advantage of the waste heat of hotblast stove tail gas, improve the production efficiency of other steps, the preliminary filtration of step 1) of the present invention may further comprise the steps:
1a) the white carbon black thin pulp being filtered the white carbon black mother liquor that obtains separates with white carbon black filter cake washing liquid, the mother liquor that sodium sulphate content is high enters hotblast stove tail gas water film dedusting tower and concentrates, part water flashes to water vapour and discharges with tail gas, and surplus solution enters settling bowl with dust;
1b) in settling bowl after the preliminary solid-liquid separation, metabisulfite solution filters the metabisulfite solution that obtains mass percent 4-8% with the white carbon black thin pulp and turns back in the hotblast stove tail gas water film dedusting tower constantly concentrated again.
For filter effect and filtration velocity are provided, the mother liquor filtration is to adopt plate-and-frame filter press to filter in the step 1).
Beneficial effect of the present invention is: hotblast stove tail gas water film dedusting replaces process water with metabisulfite solution, has saved water of productive use.Utilize hotblast stove using waste heat from tail gas evaporation concentration metabisulfite solution, make that reclaim(ed) sulfuric acid sodium has certain economic from white carbon black by-product metabisulfite solution.The metabisulfite solution of by-product utilizes hotblast stove using waste heat from tail gas evaporation concentration metabisulfite solution as white carbon black dry-heat air furnace exhaust gas water film dedusting water in the carbon white production process, and anhydrous sodium sulphate is produced in regeneration.Energy efficient is killed two birds with one stone.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment is detailed.
Technical process of the present invention is as follows:
Metabisulfite solution → water film dedusting tower of 4-8% → settling bowl → 20-23 degree Beaume metabisulfite solution → evaporative crystallizer → anhydrous sodium sulphate.
When specifically carrying out the sodium sulfate recovery, may further comprise the steps:
1) the preliminary filtration: the white carbon black mother liquor that contains the white carbon black thin pulp obtains the metabisulfite solution of 4-8% by filtration;
2) evaporation concentration: the metabisulfite solution that filtration is obtained 4-8% carries out evaporation concentration, reaches the 20-23 degree Beaume until metabisulfite solution concentration;
3) evaporative crystallization: be that the metabisulfite solution of 20-23 degree Beaume carries out evaporative crystallization with concentration, make anhydrous sodium sulphate;
Wherein,
Step 2) evaporation concentration is to carry out in hotblast stove tail gas water film dedusting tower, and utilizes the waste heat of hotblast stove tail gas water film dedusting tower in the precipitated silica production process to carry out evaporation concentration.
In the present embodiment, the precipitated silica thin pulp filters the metabisulfite solution that obtains 4-8%.This solution pumps into hotblast stove tail gas water film dedusting tower, and part water flashes to water vapour and discharges with tail gas, and surplus solution enters settling bowl with dust.Metabisulfite solution filters the metabisulfite solution that obtains 4-8% with the white carbon black thin pulp and is recycled to hotblast stove tail gas water film dedusting tower after the preliminary solid-liquid separation in settling bowl.Metabisulfite solution constantly concentrates in the working cycle.When metabisulfite solution concentration reaches the 20-23 degree Beaume in the settling bowl, after essence filter, be sent to and prepare anhydrous sodium sulphate in the evaporative crystallizer.
In the present embodiment, for filter effect and filtration velocity are provided, the mother liquor filtration is to adopt plate-and-frame filter press to filter in the step 1).
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes description of the present invention to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (4)
1. sodium sulfate recovery method in the white carbon black mother liquor, described white carbon black mother liquor is to produce in the precipitated silica production process, it is characterized in that, may further comprise the steps:
1) the preliminary filtration: white carbon black thin pulp solid-liquid separation is obtained the white carbon black mother liquor, and the mass percent of contains sodium sulfate is 4-8% in the mother liquor;
2) evaporation concentration: the metabisulfite solution that filtration is obtained 4-8% carries out evaporation concentration, reaches the 20-23 degree Beaume until metabisulfite solution concentration;
3) secondary filter: the sodium sulfate refined soln that the metabisulfite solution secondary filter that concentrates is obtained the 20-23 degree Beaume;
4) evaporative crystallization: be that the sodium sulfate refined soln of 20-23 degree Beaume carries out evaporative crystallization with concentration, make anhydrous sodium sulphate;
5) centrifugation: the anhydrous sodium sulphate that crystallization generates is separated by automatic discharge centrifuge, and mother liquor returns the continuation condensing crystal;
Wherein,
Step 2) evaporation concentration is to carry out in hotblast stove tail gas water film dedusting tower, and utilizes the waste heat of hotblast stove tail gas in the precipitated silica production process to carry out evaporation concentration.
2. sodium sulfate recovery method in the white carbon black mother liquor according to claim 1 is characterized in that, step 4) is to adopt the multiple-effect evaporation crystallizer that metabisulfite solution is carried out evaporative crystallization.
3. sodium sulfate recovery method in the white carbon black mother liquor according to claim 1 is characterized in that, the preliminary filtration of step 1) may further comprise the steps:
1a) the white carbon black thin pulp being filtered the white carbon black mother liquor that obtains separates with white carbon black filter cake washing liquid, the mother liquor that sodium sulphate content is high enters hotblast stove tail gas water film dedusting tower and concentrates, part water flashes to water vapour and discharges with tail gas, and surplus solution enters settling bowl with dust;
1b) in settling bowl after the preliminary solid-liquid separation, metabisulfite solution filters the metabisulfite solution that obtains mass percent 4-8% with the white carbon black thin pulp and turns back in the hotblast stove tail gas water film dedusting tower constantly concentrated again.
4. sodium sulfate recovery method in the white carbon black mother liquor according to claim 1 is characterized in that, the mother liquor filtration is to adopt plate-and-frame filter press to filter in the step 1).
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| CN201310220115.7A CN103318923B (en) | 2013-06-05 | 2013-06-05 | Method for recovering sodium sulfate from white carbon black mother solution |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103482809A (en) * | 2013-08-26 | 2014-01-01 | 厦门世达膜科技有限公司 | Technology for realizing zero discharge of waste water caused by white carbon black production |
| CN104724873A (en) * | 2015-03-04 | 2015-06-24 | 四川理工学院 | Method for realizing zero discharge and resource utilization of production waste water of white carbon black |
| CN104925834A (en) * | 2015-06-03 | 2015-09-23 | 郸城县凯杰科技有限公司 | Processing technology for producing sodium sulphate through mirabilite water |
| CN107814457A (en) * | 2017-12-11 | 2018-03-20 | 广州叶林环保科技有限公司 | A kind of carbon black leaches inorganic salt treatment evaporative crystallization technique |
| CN108706593A (en) * | 2018-06-06 | 2018-10-26 | 界首市众鑫科技服务有限公司 | A kind of environmental protection white carbon preparation method |
| CN111017963A (en) * | 2019-12-20 | 2020-04-17 | 江西双龙硅材料科技有限公司 | Recovery device and method for sodium sulfate in white carbon black production process |
| CN111153412A (en) * | 2020-01-15 | 2020-05-15 | 河南省睿博环境工程技术有限公司 | White carbon black production flow based on filtering washing liquid and sodium sulfate cyclic utilization |
| CN113044859A (en) * | 2021-02-23 | 2021-06-29 | 四川思达能环保科技有限公司 | Method for recovering sodium sulfate from white carbon black feed liquid |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482809A (en) * | 2013-08-26 | 2014-01-01 | 厦门世达膜科技有限公司 | Technology for realizing zero discharge of waste water caused by white carbon black production |
| CN104724873A (en) * | 2015-03-04 | 2015-06-24 | 四川理工学院 | Method for realizing zero discharge and resource utilization of production waste water of white carbon black |
| CN104925834A (en) * | 2015-06-03 | 2015-09-23 | 郸城县凯杰科技有限公司 | Processing technology for producing sodium sulphate through mirabilite water |
| CN107814457A (en) * | 2017-12-11 | 2018-03-20 | 广州叶林环保科技有限公司 | A kind of carbon black leaches inorganic salt treatment evaporative crystallization technique |
| CN108706593A (en) * | 2018-06-06 | 2018-10-26 | 界首市众鑫科技服务有限公司 | A kind of environmental protection white carbon preparation method |
| CN108706593B (en) * | 2018-06-06 | 2020-05-26 | 界首市众鑫科技服务有限公司 | Preparation method of environment-friendly white carbon black |
| CN111017963A (en) * | 2019-12-20 | 2020-04-17 | 江西双龙硅材料科技有限公司 | Recovery device and method for sodium sulfate in white carbon black production process |
| CN111153412A (en) * | 2020-01-15 | 2020-05-15 | 河南省睿博环境工程技术有限公司 | White carbon black production flow based on filtering washing liquid and sodium sulfate cyclic utilization |
| CN113044859A (en) * | 2021-02-23 | 2021-06-29 | 四川思达能环保科技有限公司 | Method for recovering sodium sulfate from white carbon black feed liquid |
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| CN103318923B (en) | 2014-12-17 |
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Address after: 354000 suburb industrial park, Fujian, Shaowu Patentee after: FUJIAN YUANXIANG NEW MATERIALS CO., LTD. Address before: 354000 suburb industrial park, Nanping, Fujian, Shaowu Patentee before: Fujian Yuanxiang Chemical Co., Ltd. |