Continuous potassium nitrate production system and production method combined with production of liquid ammonium nitrate

A liquid ammonium nitrate production system technology, applied in the field of chemical production, can solve the problems of low concentration of ammonium nitrate solution, undisclosed production process of ammonium nitrate solution, high energy consumption, etc., and achieve the effects of avoiding explosion danger, low pressure and high concentration

Active Publication Date: 2015-01-28
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the concentration of the ammonium nitrate solution used in the examples is low, which causes great pressure on the subsequent evaporation and concentration, and the energy consumption is high, and the production process of the ammonium nitrate solution is not disclosed

Method used

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  • Continuous potassium nitrate production system and production method combined with production of liquid ammonium nitrate
  • Continuous potassium nitrate production system and production method combined with production of liquid ammonium nitrate
  • Continuous potassium nitrate production system and production method combined with production of liquid ammonium nitrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A continuous potassium nitrate production system combined with liquid ammonium nitrate production, comprising a potassium nitrate production system and a liquid ammonium nitrate production system, the potassium nitrate production system comprising a dissolution tank, a potassium nitrate vacuum crystallization device, and a primary thickener , a centrifuge, a mixing tank, a concentrated preheater, a countercurrent three-effect concentration device, a vacuum continuous crystallizer 16, a secondary thickener 17 and a secondary centrifuge; the discharge port of the dissolution tank is connected to the potassium nitrate vacuum The feed port of the crystallization device is connected, the discharge port of the potassium nitrate vacuum crystallization device is connected with the feed port of the primary thickener, and the discharge port of the primary thickener is connected with the feed port of the primary centrifuge. The liquid discharge port of the centrifuge is connected t...

Embodiment 2

[0058] Utilize the method for the continuous production of potassium nitrate of the continuous potassium nitrate production system combined with the production of liquid ammonium nitrate described in embodiment 1, the steps are as follows:

[0059] (1) Add circulating mother liquor, water and Potassium Chloride in dissolving tank, mix evenly, steam is heated to 75 ℃ and dissolves, and makes mixed solution, and described circulating mother liquor is ammonium chloride mother liquor, and ammonium ion and chlorine in mixed solution The molar ratio of ions is 1:1,

[0060] (2) mixed solution enters potassium nitrate vacuum crystallization device successively, and potassium nitrate vacuum crystallization device is the device of 6 grades of series structures; 55°C, vacuum degree is 0.008MPa, the temperature of the third stage vacuum crystallizer is 42°C, the vacuum degree is 0.006MPa, the temperature of the fourth stage vacuum crystallizer is 35°C, the vacuum degree is 0.005MPa, the ...

Embodiment 3

[0065] Utilize the method for the continuous production of potassium nitrate of the continuous potassium nitrate production system combined with the production of liquid ammonium nitrate described in embodiment 1, the steps are as follows:

[0066] (1) Add circulating mother liquor, water and Potassium Chloride in dissolving tank, mix evenly, steam is heated to 80 ℃ and dissolves, and makes mixed solution, and described circulating mother liquor is ammonium chloride mother liquor, and ammonium ion and chlorine in mixed solution The molar ratio of ions is 1:1.1,

[0067] (2) mixed solution enters potassium nitrate vacuum crystallization device successively, and potassium nitrate vacuum crystallization device is the device of 6 grades of series structure; 60°C, vacuum degree is 0.009MPa, the temperature of the third stage vacuum crystallizer is 45°C, the vacuum degree is 0.007MPa, the temperature of the fourth stage vacuum crystallizer is 38°C, the vacuum degree is 0.005MPa, the...

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PUM

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Abstract

The invention relates to a continuous potassium nitrate production system and a production method combined with production of liquid ammonium nitrate. The system comprises a potassium nitrate production system and a liquid ammonium nitrate production system, wherein the potassium nitrate production system comprises a dissolving tank, a potassium nitrate vacuum crystalizing device, a primary thickener, a primary centrifugal machine, a mixing tank, a concentration preheater, a reflux triple effect concentrating device, a vacuum continuous crystalizing device, a secondary thickener, and a secondary centrifugal machine, wherein the liquid ammonium nitrate production system comprises an ammonia evaporator, a gaseous ammonia filter, an ammonia preheater, a tubular reactor, a neutralizing scrubbing tower and a flash tank. The invention develops the new continuous potassium nitrate production system combined with production of liquid ammonium nitrate, so that the efficiency of potassium nitrate production technology is improved, the crystalizing process is controlled more accurately, and the potassium nitrate crystalline quality and yield are more stable.

Description

technical field [0001] The invention relates to a continuous potassium nitrate production system combined with liquid ammonium nitrate production and a production method, belonging to the technical field of chemical production. Background technique [0002] Domestic double decomposition method to produce potassium nitrate mainly adopts sodium nitrate-potassium chloride method and ammonium nitrate-potassium chloride method. The raw material price of the former is higher, and the economic value of the by-product sodium chloride is lower. The ammonium nitrate-potassium chloride double decomposition process is widely used, and the four-step circulation method is the main method: add water and potassium chloride to the circulating mother liquor, and when the temperature drops, potassium nitrate crystallizes out. Add solid ammonium nitrate to the mother liquor, then evaporate and concentrate, cool and crystallize, and then precipitate ammonium chloride crystals. The separated mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/10C01C1/16C01C1/18C01D9/16
CPCC01C1/164C01C1/185C01D9/10C01D9/16
Inventor 王金玉李琳胡善明郭宗端
Owner KINGENTA ECOLOGICAL ENG GRP
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