Method and device for recovering waste heat in heavy ash process

Abstract

The invention discloses a method for recovering waste heat in the heavy ash process, which is characterized by recovering the heat carried by heavy ash burner gas by a heat exchange device in the heavy ash process of preparing soda ash by an ammonia-soda process. The heat exchange device comprises an exchanger body, wherein a burner gas inlet is arranged at the top end of the exchanger body; a burner gas outlet is arranged on the lower part at one side of the exchanger body; a cold mother liquor inlet is arranged on the lower part at one side of the exchanger body; a cold mother liquor outlet is arranged on the upper part at one side of the exchanger body; and a condensate outlet is arranged at the bottom end of the exchanger body; therefore, the heat is fully exchanged and the heat in the burner gas can be effectively utilized, thus saving the energy, protecting the environment, simultaneously increasing the burner gas volume and the concentration and being beneficial to increasing the carbonization conversion rate.

Description

technical field [0001] The invention relates to the technical field of soda ash production, in particular to a method for recovering waste heat in a heavy ash process and a device for realizing the method. Background technique [0002] The furnace gas produced in the original ordinary heavy ash section passes through the bellows heat exchanger and is cooled with circulating water, and the heat in the furnace gas is wasted; the furnace gas produced in the high-quality heavy ash section is heated by the washing water of the centrifuge, and a large amount of steam is emptied Not only wasted energy, but also affected the environment. Therefore, try to start from different directions, adopt various ways to make full use of heat, and achieve the purpose of saving energy and reducing consumption. [0003] The cold mother liquor produced by the filtration post in the heavy alkali workshop is transported by the cold mother liquor pump to the mother liquor scrubber in the calcination...

AI Technical Summary

Problems solved by technology

[0002] The furnace gas produced in the original ordinary heavy ash section passes through the bellows heat exchanger and is cooled with circulating water, and the heat in the furnace gas is wasted; the furnace gas produced in the high-quality heavy ash section is heated by the washing water of the centrifuge, and a large amount of steam is emptied Not only wasting energy, but also affecting the environment

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