Liquid-phase hydration separation ash treatment process

Abstract

The invention provides a liquid-phase hydration method separation ash treatment process comprising the following steps: (1) a sodium carbonate monohydrate wet material is prepared with a liquid-phase hydration method; (2) the sodium carbonate monohydrate wet material is added into a heavy ash fluidized bed, and drying is carried out, such that heavy ash is obtained; tail gas produced in the heavy ash fluidized bed is separated in a cyclone separator, such that separation ash and dust-containing air are obtained; (3) the separation ash is added into a separation ash fluidized bed, and drying is carried out, such that heavy ash and separation ash tail gas are obtained; and the separation ash tail gas is subjected to cyclone separation again in the cyclone separator. The process provided by the invention has the following advantages: separation ash is subjected to the drying treatment on the basis of an original liquid-phase hydration method heavy ash preparation process, such that separation ash alkali content is improved, and heavy ash product quality is improved; a situation of low separation ash total alkali content and the restriction on variety alkali production of prior arts are solved.

Description

technical field [0001] The invention belongs to the field of preparing heavy ash by liquid phase hydration, and in particular relates to a processing device for separating ash by liquid phase hydration. Background technique [0002] Sodium carbonate, commonly known as soda, soda ash, washing soda, chemical formula Na 2 CO3, usually white powder, is a strong electrolyte, easily soluble in water, and has the property of salt. Soda ash is an important industrial raw material, widely used in glass, chemical, light work, metallurgy and other industries. Both heavy ash and light soda ash refer to soda ash. The difference between them lies in the content of sodium carbonate and salt content. In the current national standard of soda ash in my country, the salt content of general sodium carbonate superior products is ≤0.7%, which is heavy soda ash. [0003] Heavy soda ash, also known as heavy ash, is granular and has a bulk density of ≥0.9g / cm 3 , has a wide range of uses, and gen...

AI Technical Summary

Problems solved by technology

Adding separated ash to light soda ash for hydration reaction will not only seriously deteriorate the hydration operation conditions, inhibit the hydration reaction, make the hydration reaction unable to continue, but also endanger the normal operation of the subsequent separation and drying system, sometimes causing pipeline blockage, full line parking

Workers have to clean up scars, clear passages and equipment maintenance, which can take a few days or more than ten days, which requires a lot of manpower and material resources, resulting in huge loss of raw materials

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