Anhydrous sodium sulfate production system and production method

A production system and production method technology, applied in chemical instruments and methods, alkali metal sulfites/sulfites, alkali metal compounds, etc., can solve the problems of high production cost of Yuanming powder and low production quality of Yuanming powder. , to avoid pulverization pollution and chromium pollution, save heat energy consumption cost, and reduce production cost

Active Publication Date: 2013-08-14
GANSU LANPEC TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of sodium sulfate production system, to solve the problem of high production cost of existing sodium sulfate
[0006] Another object of the present invention is to provide a kind of sodium sulfate production method, to solve the problem that existing sodium sulfate production quality is low

Method used

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  • Anhydrous sodium sulfate production system and production method
  • Anhydrous sodium sulfate production system and production method
  • Anhydrous sodium sulfate production system and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 produces Yuanming powder according to aforementioned method, and concrete process parameter is as follows:

[0041] The temperature of the reduction tower is 85°C, the temperature of the reactor is controlled at 80°C, and the reaction time is 5 hours; the time for flocculation and precipitation is 10 hours; 90°C, cycle cleaning cycle 50 hours, cleaning time 2 hours.

[0042] The filtration part can be divided into two steps of pressurized plate frame thermal filtration and deep layer filtration. The content of insoluble matter is reduced to less than 0.005%, and the content of calcium and magnesium ions is less than 0.01%. 0.01%.

Embodiment 2

[0043] Embodiment 2 According to the aforementioned method, the Yuanming powder is produced, and the concrete process parameters are as follows:

[0044] The temperature of the reduction tower is 75°C, the temperature of the reactor is controlled at 75°C, and the reaction time is 3 hours; the time for flocculation and precipitation is 8 hours; 80-℃, cycle cleaning cycle 24 hours, cleaning time 1 hour.

Embodiment 3

[0045] Embodiment 3 produces Yuan Mingfen according to aforementioned method, and concrete process parameter is as follows:

[0046]The temperature of the reduction tower is 95°C, the temperature of the reactor is controlled at 95°C, and the reaction time is 8 hours; the time for flocculation and precipitation is 12 hours; 100°C, cycle cleaning cycle 72 hours, cleaning time 4 hours.

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Abstract

The invention discloses an anhydrous sodium sulfate production system and a production method and aims to solve the problems that the conventional anhydrous sodium sulfate is high in production cost and low in production quality. The anhydrous sodium sulfate production system comprises a multistage reduction tower, a neutralization reaction kettle, a flocculent precipitate tank, a crystallizing tank and a vapor compressor, wherein evaporation and crystallization are finished in one unit; the chromium salt denitration liquid is subjected to reduction, neutralization reaction, flocculent precipitate and multistage filtering and is pumped into the evaporation and crystallization system, the crystal product is discharged and is pumped into a centrifugal machine through a crystal slurry pump, the centrifuged crystal product is fed into a fluidized bed dryer through a spiral conveyer, and the dried finished product enters a storage bin and is packaged. The anhydrous sodium sulfate granules can be effectively and freely controlled, and the technical problems that the anhydrous sodium sulfate is high in production cost, the evaporator is short in operation cycle and bad in heat exchange effect are solved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production system and production method of sodium sulfate. Background technique [0002] However, the source of my country's sodium sulfate is mainly from natural Glauber's salt ore and by-products of the salt industry. At present, the mainstream processes are multi-effect evaporation plus secondary steaming nitrate process, multi-effect evaporation plus countercurrent feeding process, natural drying and dehydration and other methods. The multi-effect evaporation method is widely used. The multi-effect evaporator can use part of the secondary steam and save part of the fresh steam, but it still consumes a lot of fresh steam, which requires a large investment in equipment and high production costs. [0003] The crystallization is mostly intermittent cooling crystallization method, the production intensity is low, and it is Na 2 SO 4 10H 2 O The cost of subsequent drying incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/00C01D5/18C01D5/16B01D9/02
Inventor 宋金虎李健韩睿超张永生赵成纲张永兴陈晓庆卢奇
Owner GANSU LANPEC TECH
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