Improvement of potassium nitrate producing method

Abstract

The invention relates to a potassium nitrate producing method, and in particular relates to partial improvement of a potassium nitrate producing method. The improvement of the potassium nitrate producing method disclosed by the invention is characterized in that 1) solid-liquid blending is performed on solid-liquid mixture crystals by using clear water, crystal water or washing water by a volume ratio of 10% to 80%, and the liquid can be recycled, solid-liquid separation is performed on the blended solid-liquid mixture crystals through gravity concentration, and different operations are carried out according to different contents of the separated crystallized materials; and 2) solid-liquid mixture crystals generated through temperature reduction or not are blended by using clear water or a circulating mother liquor by a volume ratio of 10%-80% and the liquid can be recycled, solid-liquid separation is performed on the blended solid-liquid mixture crystals through gravity concentration equipment, and different operations are carried out according to different contents of the separated crystallized materials. As a result, the quantity of potassium nitrate carried in ammonium chloride is reduced, the dosage of the clear water in the whole process is reduced, the dosage of a fuel is reduced, and considerable economic benefit can be achieved.

Description

technical field [0001] The invention relates to a production method of potassium nitrate, in particular to an improvement of a part of the production method of potassium nitrate. Background technique [0002] Now the process of producing potassium nitrate with potassium chloride and ammonium nitrate is: [0003] 1. According to the content of each substance in the circulating mother liquor or clear water, add a certain amount of potassium chloride (a certain amount of ammonium nitrate should be added when using clear water), let the above substances mix and react (heating or not). [0004] 2. For step 1: [0005] a. For the heating reaction, the solution should be cleared or cleared with a filter, and the clear solution should flow into or be pumped into the crystallizer to crystallize (the crystallization is: crystallization of mixtures such as potassium nitrate and ammonium chloride); [0006] b. For the reaction without heating, proceed directly to the next step. [00...

AI Technical Summary

Problems solved by technology

These two methods inevitably have the characteristics of difficult separation, high operation requirements, and difficult simplification of the production process.