System and method for producing potassium nitrate by adopting continuous double-decomposition method

A double decomposition method and potassium nitrate technology, applied in the field of chemical production, can solve problems such as difficult to overcome secondary effect material viscosity, high primary crystallization temperature control, low product yield, etc., to save steam consumption, save production time, and concentrate temperature low effect

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

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Benefits of technology

This patented technology improves on existing methods that produce high purity liquid or solid chemical products through efficient processes involving multiple steps such as evaporation, precipitation, filtration, drying, etc., while reducing costs associated therewith. It achieves this by controllably adjusting various parameters during processing without interrupting the entire flow path. Additionally, it allows for continuous supply/discardage of material throughout its cycle instead of just once per batch. Overall, these technical improvements enhance the overall performance and effectiveness of current techniques like thermal distillations, solvent extraction, sublimating, ion exchangers, membrane separation, electrolysis, and other related technologies.

Problems solved by technology

The technical problem addressed in this patents relates to efficiently manufacturing large amounts of both potash fertilizers and ammoxy compounds through a combination of these methods.

Method used

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  • System and method for producing potassium nitrate by adopting continuous double-decomposition method
  • System and method for producing potassium nitrate by adopting continuous double-decomposition method
  • System and method for producing potassium nitrate by adopting continuous double-decomposition method

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Experimental program
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Effect test

Embodiment 1

[0047] A system for producing potassium nitrate by continuous metathesis, comprising a primary dissolution tank, a potassium nitrate vacuum crystallization device, a primary thickener, a primary centrifuge, a washing tank, a secondary dissolution tank, a filter, a primary vacuum continuous crystallizer, a secondary Secondary thickener, secondary centrifuge, mixing tank, concentration preheater, countercurrent three-effect concentration device, secondary vacuum continuous crystallizer, tertiary thickener, tertiary centrifuge; the outlet of the primary dissolution tank It is connected with the feed port of the potassium nitrate vacuum crystallization device, 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 solid discharge port of the primary centrifuge is connected with the feed port of th...

Embodiment 2

[0055] Add ammonium chloride mother liquor, water and potassium chloride to the primary dissolution tank, so that the ratio of ammonium ions and chloride ions is 1:1, heat it to 75°C with steam and stir to dissolve it completely, and the feed liquid enters the sixth stage of potassium nitrate in sequence In the series vacuum crystallization device, by controlling the pressure of the vacuum system at all levels, the temperature in the first-stage crystallizer A1 is controlled to 70°C, the temperature in the second-stage crystallizer A2 is 55°C, the temperature in the third-stage crystallizer A3 is 42°C, and the temperature in the fourth-stage crystallizer The temperature in the device A4 is 35°C, the temperature in the fifth-stage crystallizer A5 is 25°C, and the temperature in the sixth-stage crystallizer A6 is 15°C. The material in the sixth-stage crystallizer A6 is pumped to the primary thickener and primary centrifuge through the sixth-stage discharge pump D6, and the crude ...

Embodiment 3

[0058] Add ammonium chloride mother liquor, water and potassium chloride to the primary dissolution tank, so that the ratio of ammonium ions and chloride ions is 1:1.1, heat to 80°C with steam and stir to dissolve completely, and the feed liquid enters the sixth stage of potassium nitrate in sequence In the series vacuum crystallization device, by controlling the pressure of the vacuum system at all levels, the temperature in the first-stage crystallizer A1 is controlled to 75°C, the temperature in the second-stage crystallizer A2 is 60°C, the temperature in the third-stage crystallizer A3 is 45°C, and the temperature in the fourth-stage crystallizer The temperature in the device A4 is 38°C, the temperature in the fifth stage crystallizer A5 is 30°C, and the temperature in the sixth stage crystallizer A6 is 20°C. The material in the sixth-stage crystallizer A6 is pumped to the primary thickener and primary centrifuge through the sixth-stage discharge pump D6, and the crude pota...

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Abstract

The invention discloses a system and method for producing potassium nitrate by adopting a continuous double-decomposition method. The system comprises a primary dissolving tank, a potassium nitrate vacuum crystallization device, a primary thickener, a primary centrifugal machine, a washing tank, a secondary dissolving tank, a filtering machine, a primary vacuum continuous crystallizer, a secondary thickener, a secondary centrifugal machine, a mixing tank, a concentrating preheater, a countercurrent triple-effect concentrating device, a secondary vacuum continuous crystallizer, a triple thickener and a triple centrifugal machine. According to the system and method for producing potassium nitrate by adopting the continuous double-decomposition method, disclosed by the invention, the production capacity is enlarged, the labor production intensity is reduced, and the production efficiency of a production process of the potassium nitrate is improved.

Description

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Claims

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Application Information

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Owner KINGENTA ECOLOGICAL ENG GRP
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