CN103693660A - Process for producing sodium sulfate and sodium chloride from high-salinity nitrate aqueous solution by adopting circulation method - Google Patents
Process for producing sodium sulfate and sodium chloride from high-salinity nitrate aqueous solution by adopting circulation method Download PDFInfo
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- CN103693660A CN103693660A CN201310683119.9A CN201310683119A CN103693660A CN 103693660 A CN103693660 A CN 103693660A CN 201310683119 A CN201310683119 A CN 201310683119A CN 103693660 A CN103693660 A CN 103693660A
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- mother liquor
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Abstract
The invention discloses a process for producing sodium sulfate and sodium chloride from a high-salinity nitrate aqueous solution by adopting a circulation method. The process comprises the following steps of: performing high-temperature nitrate making evaporation on the high-salinity nitrate aqueous solution at a temperature of 90-130 DEG C, and performing solid-liquid separation to obtain sodium sulfate and a nitrate making mother solution; then performing cooling evaporation on the nitrate making mother solution at a temperature of 40-60 DEG C, performing solid-liquid separation to obtain sodium chloride and a salt making mother solution, and mixing the slat making mother solution in the high-salinity nitrate aqueous solution to be recycled for high-temperature nitrate making evaporation. The process has the characteristics of simple procedures, high quality of main products and byproducts, strong adaptability of raw materials, low cost, low energy consumption, no three-waste emission and the like.
Description
Technical field
The present invention relates to technical field of inorganic chemical industry, particularly a kind ofly take sodium sulfate and the sodium-chlor cycle production process that high salt glass gall is raw material.
Background technology
The known saliferous glass gall that utilizes is produced the method for sodium sulfate and sodium-chlor, is divided into independent mother liquor absorption method and evaporation nitre mother liquor discharge processed method.But wherein independent mother liquor absorption method exists technical process length, increase of investment, the poor problem of adaptability to raw material, and evaporation nitre mother liquor discharge method processed exists discharge mother liquor containing Na
2sO4 and NaCl, raw materials recovery rate is low and affect the problem of environment.Therefore, above-mentioned two methods are inadaptable take high salt glass gall as raw material production sodium sulfate and sodium-chlor.
Summary of the invention
The object of this invention is to provide the aquatic product sodium sulfate of the high sal prunella of a kind of circulation method and sodium-chlor technique, it can adapt to sodium sulfate and sodium chloride content changes, and reduces energy consumption, reduces investment outlay and cost, is beneficial to environment protection.
For achieving the above object, the present invention takes following technical scheme:
The invention provides the aquatic product sodium sulfate of the high sal prunella of a kind of circulation method and sodium-chlor technique, the high sal prunella aqueous solution is carried out to high temperature nitre evaporation processed at 90-130 ℃, carry out solid-liquid separation and obtain sodium sulfate and nitre mother liquor processed; Then the evaporation of this nitre mother liquor processed being lowered the temperature at 40-60 ℃, carries out solid-liquid separation and obtains sodium-chlor and salt-making mother liquor, and this salt-making mother liquor is incorporated into and in this high sal prunella aqueous solution, loops high temperature nitre evaporation processed.
In the high sal prunella aqueous solution of the present invention, contain NaCl5-280g/l, Na
2sO
470-345g/l.Nitre mother liquor processed contains NaCl295-305g/l, Na
2sO
455-65g/l.Described salt-making mother liquor contains NaCl285-295g/l, Na
2sO
460-70g/l.
Preferably, the high sal prunella aqueous solution is carried out at 125 ℃ to high temperature nitre evaporation processed.
Preferably, this nitre mother liquor processed is lowered the temperature at 48 ℃ evaporation.
Preferably, described solid-liquid separation adopts whizzer separation means.
The source of the above-mentioned high sal prunella aqueous solution is mirabilite ore, can be also other high sal prunella aqueous solution that contain a small amount of calcium sulfate and magnesium sulfate.
The invention has the beneficial effects as follows: the present invention has the advantages such as technical process is terse, major-minor quality product is high, adaptability to raw material is strong, cost is low, energy consumption is low, three-waste free discharge.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
According to technical process shown in Fig. 1, use steam that high salt glass gall is carried out to multiple-effect high-temperature nitre evaporation processed, carry out solid-liquid separation and obtain sodium sulfate and nitre mother liquor processed; Then by this nitre mother liquor processed in the evaporation of lowering the temperature, carry out solid-liquid separation and obtain sodium-chlor and salt-making mother liquor, this salt-making mother liquor is incorporated into and in this high sal prunella aqueous solution, loops multiple-effect high-temperature nitre evaporation processed.Below only for several embodiment, technique of the present invention is elaborated, however the practical range that it is not intended to limiting the invention.
Embodiment 1: get 100m
3glass gall is (containing NaCl180g/l, Na
2sO
4180g/l) with circulation salt-making mother liquor 247.5m
3for raw material evaporates, vaporization temperature 60-130 ℃, then carries out solid-liquid separation with whizzer and obtains 18 tons, sodium sulfate and the nitre mother liquor 301.5m processed in raw material
3, nitre mother liquor component (NaCl290g/l, Na processed
2sO
456g/l), cooling evaporation nitre mother liquor processed wherein carries out solid-liquid separation and obtains salt-making mother liquor 247.5m
3with 18 tons, sodium-chlor, 45 ℃ of vaporization temperatures, salt-making mother liquor component (NaCl286g/l, Na
2sO
468g/l), this salt-making mother liquor participates in the lower above-mentioned high temperature evaporation of circulation nitre operation processed.
Embodiment 2: get 100m
3glass gall is (containing NaCl260g/l, Na
2sO
4100g/l) with circulation salt-making mother liquor 500.5m
3for raw material evaporates, vaporization temperature 60-130 ℃, then carries out solid-liquid separation with whizzer and obtains 10 tons, sodium sulfate and the nitre mother liquor 578.5m processed in raw material
3, nitre mother liquor component (NaCl291g/l, Na processed
2sO
457g/l), cooling evaporation nitre mother liquor processed wherein carries out solid-liquid separation and obtains salt-making mother liquor 500.5m
3with 26 tons, sodium-chlor, 50 ℃ of vaporization temperatures, salt-making mother liquor component (NaCl292g/l, Na
2sO
462g/l), this salt-making mother liquor participates in the lower above-mentioned high temperature evaporation of circulation nitre operation processed.
Embodiment 3: get 100m
3glass gall is (containing NaCl100g/l, Na
2sO
4260g/l) with circulation salt-making mother liquor 137.5m
3for raw material evaporates, vaporization temperature 60-130 ℃, then carries out solid-liquid separation with whizzer and obtains 26 tons, sodium sulfate and the nitre mother liquor 167.5m processed in raw material
3, nitre mother liquor component (NaCl290g/l, Na processed
2sO
456g/l), cooling evaporation nitre mother liquor processed wherein carries out solid-liquid separation and obtains salt-making mother liquor 137.5m
3with 10 tons, sodium-chlor, 45 ℃ of vaporization temperatures, salt-making mother liquor component (NaCl286g/l, Na
2sO
468g/l), this salt-making mother liquor participates in the lower above-mentioned high temperature evaporation of circulation nitre operation processed.
In above-mentioned technological process, the theoretical recovery of sodium sulfate and sodium-chlor is 100%, the consumption of ton product evaporated vapor significantly reduces, the rate of recovery of discharging method 50-90% compared with known technology evaporation nitre mother liquor processed has significantly raising, compared with known technology nitre mother liquor processed independence absorption method, save steam 10-30%, product sodium sulfate quality reaches the acceptable end product standard of country's promulgation (containing Na
2sO
4>=99%, Cl-≤0.35%), product sodium-chlor quality reach the premium grads standard that country promulgates (containing NaCl>=99.1%, SO
4 2-≤ 0.30%).Whole technological process is discharged without waste liquid, has the features such as technical process is terse, major-minor quality product is high, adaptability to raw material is strong, cost is low, energy consumption is low, three-waste free discharge.
Claims (7)
1. the aquatic product sodium sulfate of the high sal prunella of circulation method and a sodium-chlor technique, is characterized in that, the high sal prunella aqueous solution is carried out to high temperature nitre evaporation processed at 90-130 ℃, carries out solid-liquid separation and obtain sodium sulfate and nitre mother liquor processed; Then the evaporation of this nitre mother liquor processed being lowered the temperature at 40-60 ℃, carries out solid-liquid separation and obtains sodium-chlor and salt-making mother liquor, and this salt-making mother liquor is incorporated into and in this high sal prunella aqueous solution, loops high temperature nitre evaporation processed.
2. the aquatic product sodium sulfate of the high sal prunella of circulation method according to claim 1 and sodium-chlor technique, is characterized in that: the described high sal prunella aqueous solution is carried out to high temperature nitre evaporation processed at 125 ℃.
3. the aquatic product sodium sulfate of the high sal prunella of circulation method according to claim 1 and sodium-chlor technique, is characterized in that: by the evaporation of lowering the temperature at 48 ℃ of described nitre mother liquor processed.
4. according to the aquatic product sodium sulfate of the high sal prunella of the circulation method described in any one in claims 1 to 3 and sodium-chlor technique, it is characterized in that: described solid-liquid separation adopts whizzer separation means.
5. the aquatic product sodium sulfate of the high sal prunella of circulation method according to claim 1 and sodium-chlor technique, is characterized in that: the described high sal prunella aqueous solution contains NaCl5-280g/l, Na
2sO
470-345g/l.
6. the aquatic product sodium sulfate of the high sal prunella of circulation method according to claim 1 and sodium-chlor technique, is characterized in that: described nitre mother liquor processed contains NaCl295-305g/l, Na
2sO
455-65g/l.
7. the aquatic product sodium sulfate of the high sal prunella of circulation method according to claim 1 and sodium-chlor technique, is characterized in that: described salt-making mother liquor contains NaCl285-295g/l, Na
2sO
460-70g/l.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326487A (en) * | 2014-10-16 | 2015-02-04 | 中国中轻国际工程有限公司 | Sodium chloride and sodium sulfate production process |
| CN104326488A (en) * | 2014-10-16 | 2015-02-04 | 中国中轻国际工程有限公司 | Sodium sulfate and sodium chloride production process |
| CN104386870A (en) * | 2014-11-26 | 2015-03-04 | 深圳能源资源综合开发有限公司 | Coal chemical high concentrated brine evaporation crystallization recycling process and dedicated system |
| CN106904639A (en) * | 2017-03-03 | 2017-06-30 | 中国中轻国际工程有限公司 | The new technology of sodium chloride and sodium sulphate is obtained in a kind of sodium chloride, sodium sulphate mixed solution respectively |
| CN108249462A (en) * | 2018-02-06 | 2018-07-06 | 中国中轻国际工程有限公司 | A kind of akali sulphide thin liquid and mirabilite hydrate production vulcanized sodium and sodium sulphate technique |
| CN110422862A (en) * | 2019-07-15 | 2019-11-08 | 中国中轻国际工程有限公司 | A kind of less salt glass gall multi-stage countercurrent, which is saltoutd, produces sodium sulfate in high purity technique |
| CN110759361A (en) * | 2018-07-25 | 2020-02-07 | 江苏省制盐工业研究所有限公司 | Method for poly-generation of potassium lithium nitrate by sodium sulfate type brine or mother liquor of potassium nitrate |
| CN114516791A (en) * | 2022-01-24 | 2022-05-20 | 李建阁 | Method and system for recovering solid salt in production of isooctanoic acid |
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| CN1341557A (en) * | 2000-09-07 | 2002-03-27 | 湖北双环化工集团公司技术中心设计研究院 | Joint production process of salt and salt-cake |
| CN1944256A (en) * | 2006-10-25 | 2007-04-11 | 中国中轻国际工程有限公司 | Process for producing sodium sulfate and sodium chloride in Na2SO4-NaCl-H2O system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326487A (en) * | 2014-10-16 | 2015-02-04 | 中国中轻国际工程有限公司 | Sodium chloride and sodium sulfate production process |
| CN104326488A (en) * | 2014-10-16 | 2015-02-04 | 中国中轻国际工程有限公司 | Sodium sulfate and sodium chloride production process |
| CN104386870A (en) * | 2014-11-26 | 2015-03-04 | 深圳能源资源综合开发有限公司 | Coal chemical high concentrated brine evaporation crystallization recycling process and dedicated system |
| CN106904639A (en) * | 2017-03-03 | 2017-06-30 | 中国中轻国际工程有限公司 | The new technology of sodium chloride and sodium sulphate is obtained in a kind of sodium chloride, sodium sulphate mixed solution respectively |
| CN106904639B (en) * | 2017-03-03 | 2019-08-02 | 中国中轻国际工程有限公司 | The new process of sodium chloride and sodium sulphate is obtained in a kind of sodium chloride, sodium sulphate mixed solution respectively |
| CN108249462A (en) * | 2018-02-06 | 2018-07-06 | 中国中轻国际工程有限公司 | A kind of akali sulphide thin liquid and mirabilite hydrate production vulcanized sodium and sodium sulphate technique |
| CN110759361A (en) * | 2018-07-25 | 2020-02-07 | 江苏省制盐工业研究所有限公司 | Method for poly-generation of potassium lithium nitrate by sodium sulfate type brine or mother liquor of potassium nitrate |
| CN110759361B (en) * | 2018-07-25 | 2021-06-15 | 江苏省制盐工业研究所有限公司 | Method for poly-generation of potassium lithium nitrate by sodium sulfate type brine or mother liquor of potassium nitrate |
| CN110422862A (en) * | 2019-07-15 | 2019-11-08 | 中国中轻国际工程有限公司 | A kind of less salt glass gall multi-stage countercurrent, which is saltoutd, produces sodium sulfate in high purity technique |
| CN114516791A (en) * | 2022-01-24 | 2022-05-20 | 李建阁 | Method and system for recovering solid salt in production of isooctanoic acid |
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Application publication date: 20140402 |