CN102320630A - Production method of anhydrous sodium sulfate and production equipment thereof - Google Patents
Production method of anhydrous sodium sulfate and production equipment thereof Download PDFInfo
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- CN102320630A CN102320630A CN201110259451A CN201110259451A CN102320630A CN 102320630 A CN102320630 A CN 102320630A CN 201110259451 A CN201110259451 A CN 201110259451A CN 201110259451 A CN201110259451 A CN 201110259451A CN 102320630 A CN102320630 A CN 102320630A
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- sodium sulphate
- sulphate anhydrous
- anhydrous 99pct
- 99pct
- sodium
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Abstract
The invention provides a production method of purely-natural anhydrous sodium sulfate with a pH value being 6 to 8 and production equipment thereof. The production method of the anhydrous sodium sulfate disclosed by the invention comprises the following steps of: (1) purifying a sodium-sulfate aqueous solution; (2) preparing sodium sulfate decahydrate through the saturated crystallization of the sodium-sulfate aqueous solution at the temperature of 32.4 DEG C; (3) melting the sodium sulfate decahydrate in a melting tank; and (4) washing anhydrous sodium-sulfate crystals, concentrating the anhydrous sodium-sulfate crystals in a concentrator, and then dewatering and drying through a centrifugal machine to obtain the anhydrous sodium sulfate. Because two-time crystallization is adopted and no other chemical reagent is added in the production method of the anhydrous sodium sulfate and the production equipment of the production method, the produced industrial anhydrous sodium sulfate is natural, the content of Na2SO4 in a product is larger than 99.80wt%, the pH value is 6 to 8, and the product with the granularity D50 being 70-1200mu m can be produced.
Description
Technical field
The present invention relates to a kind of working method and production unit thereof of sodium sulfate, especially a kind of working method of SODIUM SULPHATE ANHYDROUS 99PCT and production unit thereof.
Background technology
The method of existing production SODIUM SULPHATE ANHYDROUS 99PCT has obtained the SODIUM SULPHATE ANHYDROUS 99PCT product, all adds some chemical ingredientss and processes, and the SODIUM SULPHATE ANHYDROUS 99PCT that therefore obtains is not natural SODIUM SULPHATE ANHYDROUS 99PCT, and Na wherein
2SO
4Content be generally 99.3wt%, moisture content is generally 0.1wt%, also contains a certain amount of calcium, magnesium, iron and muriate, the pH value that be difficult to guarantee SODIUM SULPHATE ANHYDROUS 99PCT be a neutrality.Yet the SODIUM SULPHATE ANHYDROUS 99PCT pH value that present advanced country in the world is produced is 6-8, so existing SODIUM SULPHATE ANHYDROUS 99PCT particulate working method is difficult to reach the standard of developed country.
Summary of the invention
The purpose of this invention is to provide a kind of pure natural, pH value is at the working method and the production unit thereof of the SODIUM SULPHATE ANHYDROUS 99PCT of 6-8.
Realize the working method of the SODIUM SULPHATE ANHYDROUS 99PCT of one of the object of the invention, comprise the steps:
(1) purify aqueous sodium persulfate solution, with aqueous sodium persulfate solution through heavy remove remove a large amount of impurity after, with accurate filter aqueous sodium persulfate solution is filtered, make mechanical impurity and TSM in the aqueous sodium persulfate solution be lower than 10PPm;
(2) aqueous sodium persulfate solution that step (1) is obtained is produced sal glauberi at saturated crystallization below 32.4 ℃;
(3) sal glauberi that step (2) is obtained carries out heat exchange with SODIUM SULPHATE ANHYDROUS 99PCT from the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer in the fusion jar, described sal glauberi directly generation anhydrous slufuric acid sodium crystal and saturated metabisulfite solution after absorbing heat;
(4) the anhydrous slufuric acid sodium crystal that generated of step (3) concentrates with sending in the washing concentrating device from the crystal of SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer; And then obtain the SODIUM SULPHATE ANHYDROUS 99PCT of water content behind the process centrifuge dewatering less than 4wt%, get into dry fluidised bed drying again and obtain SODIUM SULPHATE ANHYDROUS 99PCT.
The step of producing sal glauberi in the said step (2) be aqueous sodium persulfate solution that step (1) is obtained earlier through a flash tank flash distillation, get into the sal glauberi mold again and carry out crystallization, adopt whizzer or other vacuum apparatus to dewater then.
The saturated metabisulfite solution that generates in the said step (3) is sent into the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer and is produced the anhydrous slufuric acid sodium crystal, sends in the said fusion jar again and carries out heat exchange with sal glauberi.
Realize the production unit of two the SODIUM SULPHATE ANHYDROUS 99PCT of the object of the invention; Comprise clarifying tank, accurate filter, flash tank, sal glauberi mold, wet cyclone, sal glauberi whizzer, fusion jar, washing concentrating device, SODIUM SULPHATE ANHYDROUS 99PCT whizzer and dry fluidized-bed, connect successively; The liquid exit of said SODIUM SULPHATE ANHYDROUS 99PCT whizzer connects the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer, and said SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer links to each other with said fusion jar.
The taphole of said sal glauberi whizzer links to each other with said flash tank.
The aqueous solution outlet of said flash tank links to each other with said clarifying tank.
Said accurate filter is a pipe filter.
Said flash tank is a vacuum vessel.
Said washing concentrating device has Weight detecting device.
Said fusion jar has outer loop pump and bottom cycle pump.
The working method of a kind of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention and the beneficial effect of production unit thereof are following:
The working method of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention and production unit thereof and since adopt be twice crystallization and do not have other chemical reagent and add that the industrial anhydrous sodium sulfate of being produced is natural, Na in its product
2SO
4% content is greater than 99.80wt%, and pH value is 6-8, product that can production granularity D50=70-1200um.
Description of drawings
Fig. 1 is the structural representation of the production unit of a kind of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention.
Embodiment
Embodiments of the invention are following:
The working method of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention comprises the steps:
(1) purification of aqueous sodium persulfate solution (or being called for short glass gall)
The aqueous sodium persulfate solution that obtains from mine or alternate manner at first through heavy remove remove a large amount of impurity after; With accurate filter aqueous sodium persulfate solution is filtered and to produce qualified aqueous sodium persulfate solution or to be called for short smart glass gall, make mechanical impurity and TSM in the aqueous sodium persulfate solution be lower than 10PPm.
(2) sal glauberi produces
Sal glauberi claims that again saltcake or ten its molecular formula of water nitre are: Na2SO4.10H2O, sal glauberi are that aqueous sodium persulfate solution is produced at saturated crystallization below 32.4 ℃.In the future the aqueous sodium persulfate solution of self-purification workshop section is earlier through a flash tank flash distillation, and aqueous sodium persulfate solution is evaporated a part of water through after the flash distillation, and aqueous sodium persulfate solution is lowered the temperature after 3-5 ℃ simultaneously, gets into the sal glauberi mold.Aqueous sodium persulfate solution generates the sal glauberi crystal through freezing back in ten water nitre molds, adopt whizzer or other vacuum apparatus to dewater and obtain producing the needed sal glauberi of SODIUM SULPHATE ANHYDROUS 99PCT.
(3) fusion of sal glauberi
The sal glauberi that is obtained by whizzer or vacuum hydro-extraction carries out heat exchange with anhydrous nitre nitre slurry from anhydrous nitre evaporative crystallizer in a fusion jar that has outer loop pump and a bottom cycle pump, sal glauberi has directly generated anhydrous slufuric acid sodium crystal and saturated metabisulfite solution after absorbing heat.
The saturated metabisulfite solution that is wherein generated gets into the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer and produces the anhydrous slufuric acid sodium crystal, sends into fusion jar and sal glauberi again and carries out heat exchange.
(4) the anhydrous slufuric acid sodium crystal that is generated is with using from the crystal of SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer in pump pump to the special washing concentrating device (have washing and weigh monitoring); Liquid concentrator obtains the SODIUM SULPHATE ANHYDROUS 99PCT of water content less than 4wt% through behind the centrifuge dewatering; Get into dry fluidised bed drying again and obtain the SODIUM SULPHATE ANHYDROUS 99PCT of water content, through the sale of dispatching from the factory after the packing less than 0.02wt%.
As shown in Figure 1; The production unit of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention; Comprise clarifying tank 1, accurate filter 2, flash tank 3, sal glauberi mold 4, wet cyclone 5, sal glauberi whizzer 6, fusion jar 7, washing concentrating device 8, SODIUM SULPHATE ANHYDROUS 99PCT whizzer 9 and dry fluidized-bed 10, connect successively; The liquid exit of said SODIUM SULPHATE ANHYDROUS 99PCT whizzer 9 connects SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer 11, and said SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer 11 links to each other with said fusion jar 7.Said clarifying tank 1 links to each other with mine bath 12, and the taphole of said sal glauberi whizzer 6 links to each other with said flash tank 3.The aqueous solution outlet of said flash tank 3 links to each other with said clarifying tank 1.
In addition, accurate filter 2 is a pipe filter; Flash tank 3 is a vacuum vessel; Washing concentrating device 8 has Weight detecting device; Fusion jar 7 has outer loop pump and bottom cycle pump.
The SODIUM SULPHATE ANHYDROUS 99PCT that the working method of employing SODIUM SULPHATE ANHYDROUS 99PCT of the present invention is produced is following with the index of the excellent SODIUM SULPHATE ANHYDROUS 99PCT of I class in China GB/T6009-2003 standard:
This shows that the working method of SODIUM SULPHATE ANHYDROUS 99PCT of the present invention can be produced the neutral anhydrous sodium sulfate of pH value between 6-8, and granularity is adjustable; Moisture content is less than 0.02wt%; Sodium sulphate content is higher than national standard greater than 99.8wt%, and other foreign matter content also is far smaller than national standard.
Embodiment recited above describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the spiritual prerequisite not breaking away from the present invention; Various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. the working method of a SODIUM SULPHATE ANHYDROUS 99PCT comprises the steps:
(1) purify aqueous sodium persulfate solution, with aqueous sodium persulfate solution through heavy remove remove a large amount of impurity after, with accurate filter aqueous sodium persulfate solution is filtered, make mechanical impurity and TSM in the aqueous sodium persulfate solution be lower than 10PPm;
(2) aqueous sodium persulfate solution that said step (1) is obtained is produced sal glauberi at saturated crystallization below 32.4 ℃;
(3) sal glauberi that said step (2) is obtained carries out heat exchange with SODIUM SULPHATE ANHYDROUS 99PCT from the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer in the fusion jar, said sal glauberi directly generation anhydrous slufuric acid sodium crystal and saturated metabisulfite solution after absorbing heat;
(4) the anhydrous slufuric acid sodium crystal that said step (3) is generated concentrates with sending in the washing concentrating device from the crystal of SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer; And then obtain the SODIUM SULPHATE ANHYDROUS 99PCT of water content behind the process centrifuge dewatering less than 4wt%, get into dry fluidised bed drying again and obtain SODIUM SULPHATE ANHYDROUS 99PCT.
2. the working method of SODIUM SULPHATE ANHYDROUS 99PCT according to claim 1; It is characterized in that: the step of producing sal glauberi in the said step (2) is that aqueous sodium persulfate solution that said step (1) is obtained is earlier through a flash tank flash distillation; Get into the sal glauberi mold again and carry out crystallization, adopt whizzer or other vacuum apparatus to dewater then.
3. the working method of SODIUM SULPHATE ANHYDROUS 99PCT according to claim 1 and 2; It is characterized in that: the saturated metabisulfite solution that generates in the said step (3) is sent into the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer and is produced the anhydrous slufuric acid sodium crystal, sends in the said fusion jar again and carries out heat exchange with sal glauberi.
4. production unit of realizing the working method of the described SODIUM SULPHATE ANHYDROUS 99PCT of claim 1～3; Comprise clarifying tank, accurate filter, flash tank, sal glauberi mold, wet cyclone, sal glauberi whizzer, fusion jar, washing concentrating device, SODIUM SULPHATE ANHYDROUS 99PCT whizzer and dry fluidized-bed, connect successively; The liquid exit of said SODIUM SULPHATE ANHYDROUS 99PCT whizzer connects the SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer, and said SODIUM SULPHATE ANHYDROUS 99PCT evaporative crystallizer links to each other with said fusion jar.
5. the production unit of SODIUM SULPHATE ANHYDROUS 99PCT according to claim 4, it is characterized in that: the taphole of said sal glauberi whizzer links to each other with said flash tank.
6. the production unit of SODIUM SULPHATE ANHYDROUS 99PCT according to claim 4 is characterized in that: the aqueous solution outlet of said flash tank links to each other with said clarifying tank.
7. according to the production unit of the arbitrary described sewage sodium sulfate of claim 4～6, it is characterized in that: said accurate filter is a pipe filter.
8. according to the production unit of the arbitrary described SODIUM SULPHATE ANHYDROUS 99PCT of claim 4～6, it is characterized in that: said flash tank is a vacuum vessel.
9. according to the production unit of the arbitrary described SODIUM SULPHATE ANHYDROUS 99PCT of claim 4～6, it is characterized in that: said washing concentrating device has Weight detecting device.
10. according to the production unit of the arbitrary described SODIUM SULPHATE ANHYDROUS 99PCT of claim 4～6, it is characterized in that: said fusion jar has outer loop pump and bottom cycle pump.
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| CN201110259451A CN102320630A (en) | 2011-09-05 | 2011-09-05 | Production method of anhydrous sodium sulfate and production equipment thereof |
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| CN201110259451A CN102320630A (en) | 2011-09-05 | 2011-09-05 | Production method of anhydrous sodium sulfate and production equipment thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310437A (en) * | 2014-10-11 | 2015-01-28 | 中国轻工业长沙工程有限公司 | Technique for preparing anhydrous nitre from mirabilite |
| CN105948080A (en) * | 2015-11-23 | 2016-09-21 | 湖南衡阳新澧化工有限公司 | Preparation method of large grained anhydrous sodium sulfate |
| CN106752088A (en) * | 2015-11-24 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of production method of superfine modified anhydrous sodium sulphate |
| CN106745088A (en) * | 2015-11-23 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of mirabilite ore produces the device and method of sodium sulfate in high purity |
| CN108821493A (en) * | 2018-06-28 | 2018-11-16 | 上海力脉环保设备有限公司 | A kind of Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic tar refining processing method of sodium sulfate wastewater containing phenol |
| CN109665548A (en) * | 2018-12-29 | 2019-04-23 | 江苏南大环保科技有限公司 | A kind of processing method of vanadium wastewater and the processing method of precipitation waste residue |
| CN110606609A (en) * | 2019-08-01 | 2019-12-24 | 中石化宁波工程有限公司 | Method for recovering organic matters in F-T synthesis reaction water |
| CN111533142A (en) * | 2020-06-04 | 2020-08-14 | 新疆中泰化学阜康能源有限公司 | Circular production method for heating precipitated anhydrous sodium sulphate, cooling, crystallizing and concentrating |
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| CN1178194A (en) * | 1996-08-29 | 1998-04-08 | 内蒙古伊克昭化工研究设计院 | Liquid phase one step crystallizing process for producing crystal sodium sulphate from nitrate containing brine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310437A (en) * | 2014-10-11 | 2015-01-28 | 中国轻工业长沙工程有限公司 | Technique for preparing anhydrous nitre from mirabilite |
| CN105948080A (en) * | 2015-11-23 | 2016-09-21 | 湖南衡阳新澧化工有限公司 | Preparation method of large grained anhydrous sodium sulfate |
| CN106745088A (en) * | 2015-11-23 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of mirabilite ore produces the device and method of sodium sulfate in high purity |
| CN106752088A (en) * | 2015-11-24 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of production method of superfine modified anhydrous sodium sulphate |
| CN108821493A (en) * | 2018-06-28 | 2018-11-16 | 上海力脉环保设备有限公司 | A kind of Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic tar refining processing method of sodium sulfate wastewater containing phenol |
| CN109665548A (en) * | 2018-12-29 | 2019-04-23 | 江苏南大环保科技有限公司 | A kind of processing method of vanadium wastewater and the processing method of precipitation waste residue |
| CN110606609A (en) * | 2019-08-01 | 2019-12-24 | 中石化宁波工程有限公司 | Method for recovering organic matters in F-T synthesis reaction water |
| CN110606609B (en) * | 2019-08-01 | 2022-06-14 | 中石化宁波工程有限公司 | Method for recovering organic matters in F-T synthesis reaction water |
| CN111533142A (en) * | 2020-06-04 | 2020-08-14 | 新疆中泰化学阜康能源有限公司 | Circular production method for heating precipitated anhydrous sodium sulphate, cooling, crystallizing and concentrating |
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Application publication date: 20120118 |