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Continuous potassium nitrate production system combined with liquid ammonium nitrate production

A liquid ammonium nitrate production system technology, applied in the field of chemical production, can solve the problems of high energy consumption, low concentration of ammonium nitrate solution, and undisclosed production process of ammonium nitrate solution, and achieve high concentration, avoid explosion hazard, and low pressure Effect

Active Publication Date: 2015-01-07
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 combined with liquid ammonium nitrate production
  • Continuous potassium nitrate production system combined with liquid ammonium nitrate production
  • Continuous potassium nitrate production system combined with liquid ammonium nitrate production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 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 concentration preheater, a countercurrent three-effect concentration device, a vacuum continuous crystallizer, a secondary thickener and a secondary centrifuge; the outlet of the dissolution tank and the potassium nitrate vacuum crystallization device The feed port of the potassium nitrate vacuum crystallization device is connected with the feed port of the primary thickener, the discharge port of the primary thickener is connected with the feed port of the primary centrifuge, and the primary centrifuge The liquid discharge port of the liquid is connected with the feed port of the mixing tank, the disc...

Embodiment 2

[0059] 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:

[0060] (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,

[0061] (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; 55°C, vacuum degree is 0.018MPa, the temperature of the third stage vacuum crystallizer is 42°C, the vacuum degree is 0.010MPa, the temperature of the fourth stage vacuum crystallizer is 35°C, the vacuum degree is 0.003MPa, the t...

Embodiment 3

[0066] 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:

[0067] (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,

[0068] (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 0.015MPa, the temperature of the third stage vacuum crystallizer is 45°C, the vacuum degree is 0.008MPa, the temperature of the fourth stage vacuum crystallizer is 38°C, the vacuum degree is 0.004MPa, the...

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Abstract

The invention relates to a continuous potassium nitrate production system combined with liquid ammonium nitrate production. 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 crystallization device, a primary thickener, a primary centrifuge, a mixing tank, a concentration preheater, a forced circulation backflow counterflow triple-effect concentrator, a vacuum continuous crystallizer, a secondary thickener and a secondary centrifuge; the liquid ammonium nitrate production system comprises an ammonia evaporator, an ammonia gas filter, an ammonia preheater, a tubular reactor, a neutralization washing tower and a flash drum. A set of continuous potassium nitrate production novel-technology combined with liquid ammonium nitrate production is developed by the invention, so that the production efficiency of the potassium nitrate production technology is improved, the crystallization process is controlled more accurately, and the quality and yield of crystallized potassium nitrate are more stable.

Description

technical field [0001] The invention relates to a continuous potassium nitrate production system combined with liquid ammonium nitrate production, 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 mother liquor is returned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/10C01C1/18B01D1/26B01D9/02
CPCB01D1/26C01C1/185C01D9/10
Inventor 王金玉李新柱李琳张国栋
Owner KINGENTA ECOLOGICAL ENG GRP
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