Reaction heat comprehensive utilization system and reaction heat comprehensive utilization method in coproduction of potassium nitrate and ammonium chloride

A technology of potassium nitrate and ammonium chloride, applied in ammonium chloride, chemical instruments and methods, ammonium halide, etc., can solve the problems of low thermal efficiency, unfavorable energy saving and consumption reduction, etc., achieve short residence time, save steam consumption, reduce The effect of energy consumption

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

AI Technical Summary

Problems solved by technology

By combining the production of raw material ammonium nitrate with the production process of potassium nitrate and ammonium chloride, the high-temperature process steam in the ammonium nitrate flashing process is used as the heat source for ammonium chloride concentration to solve the problem of low thermal efficiency in the prior art , is not conducive to the problem of energy saving and consumption reduction

Method used

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  • Reaction heat comprehensive utilization system and reaction heat comprehensive utilization method in coproduction of potassium nitrate and ammonium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a system for comprehensive utilization of reaction heat in the production of potassium nitrate co-production ammonium chloride includes a tubular reactor 1, a flash tank 2, a neutralization washing tower 3, a neutralization washing pump 4, and a countercurrent three-effect concentration device; Wherein, the tubular reactor 1 is connected with the flash tank 2, and there is a pipe above the flash tank 2 to communicate with the middle part of the neutralization washing tower 3, and the neutralization washing tower 3 is connected to the flash tank 2 through the neutralization washing pump 4, and the neutralization The top of the washing tower 4 is connected to the steam inlet of the upper part of the first-effect heater 5 in the countercurrent three-effect concentration device through a pipeline;

[0031] The countercurrent three-effect concentrating device comprises three sets of concentrating devices connected in series, one effect concentratin...

Embodiment 2

[0034] A method for comprehensive utilization of reaction heat in potassium nitrate co-production ammonium chloride production, comprising the steps of:

[0035] (1) gaseous ammonia carries out pressurized neutralization reaction with 56wt% dilute nitric acid in tubular reactor 1, and pressure is 0.5MPa, and the molar ratio of control gaseous ammonia and dilute nitric acid is 1~3: 1; Reaction liquid enters flash evaporation Tank 2, use the heat of reaction to carry out flash distillation and concentration to obtain an ammonium nitrate solution with a concentration of 85% to 98%;

[0036] (2) The ammonium nitrate solution obtained above is mixed with the mother liquor of potassium nitrate to obtain the mother liquor before concentration. The addition of the ammonium nitrate solution is added to the mixed solution until the ammonium chloride reaches saturation. After preheating, it enters the countercurrent three-effect concentration device; described potassium nitrate mother li...

Embodiment 3

[0039] A method for comprehensive utilization of reaction heat in potassium nitrate co-production ammonium chloride production, comprising the steps of:

[0040] (1) Gas ammonia is neutralized with 62wt% dilute nitric acid in tubular reactor 1 under pressure at 0.4MPa, and the molar ratio of gas ammonia and dilute nitric acid is controlled to be 0.8-1:1; the reaction liquid enters flash evaporation Tank 2, use the heat of reaction to carry out flash distillation and concentration to obtain an ammonium nitrate solution with a concentration of 85% to 98%;

[0041] (2) The ammonium nitrate solution obtained above is mixed with the mother liquor of potassium nitrate to obtain the mother liquor before concentration. The addition of the ammonium nitrate solution is added to the mixed solution until the ammonium chloride reaches saturation. After preheating, it enters the countercurrent three-effect concentration device; described potassium nitrate mother liquor refers to the solutio...

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Abstract

The invention discloses a reaction heat comprehensive utilization system and a reaction heat comprehensive utilization method in coproduction of potassium nitrate and ammonium chloride. The system comprises a tubular reactor, a flash tank, a neutralizing washing tower, a neutralizing washing pump and a countercurrent triple-effect concentration device. By combining production of a raw material ammonium nitrate with a production process of potassium nitrate and ammonium chloride together, the problem that in the prior art, the heat efficiency is very low and is adverse to energy conservation and consumption reduction is solved by using high temperature process steam in a ammonium nitrate flash process.

Description

technical field [0001] The invention relates to a system and method for comprehensive utilization of energy in the production of potassium nitrate, in particular to a system and method for comprehensive utilization of reaction heat in the production of potassium nitrate and ammonium chloride, and belongs to the technical field of chemical production. Background technique [0002] Potassium nitrate is widely used in the agricultural market, and potassium nitrate belongs to binary compound fertilizer. Potassium nitrate is a chlorine-free potassium and nitrogen compound fertilizer. The total content of plant nutrients potassium and nitrogen can reach about 60%, and it has good physical and chemical properties. Potassium nitrate applied to tobacco has high fertilizer efficiency, is easy to absorb, promotes early growth of seedlings, increases tobacco yield, and plays an important role in improving tobacco quality. Ammonium chloride is a fast-acting nitrogen fertilizer and is ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/10C01C1/16B01D1/26
CPCB01D1/26C01C1/164C01C1/185C01D9/10Y02P20/10
Inventor 李树坤刘树光侯良玉赵强
Owner KINGENTA ECOLOGICAL ENG GRP
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