Regeneration method for desulfurization liquid of coal-to-fuel gas wet oxidation method desulfurization

Abstract

The present invention provides a regeneration method for a desulfurization liquid of coal-to-fuel gas wet oxidation method desulfurization, wherein a desulfurization liquid changed into a pregnant solution is introduced into a regeneration tank under a catalysis condition, oxygen gas and air are mixed according to a volume ratio of 1:(5-6), the mixed gas is introduced into the pregnant solution in the regeneration tank, and a reaction is performed to obtain the finished product. The regeneration method has characteristics of simple process, easy condition control, and low cost. During a desulfurization liquid regeneration process, a catalyst use amount is low, a secondary salt production amount is less, sulfur foam characteristics are stable, flotation is easily performed, desulfurization efficiency is high, a desulfurization liquid regeneration effect is good, and a recycling rate is high.

Description

technical field [0001] The invention relates to a desulfurization liquid for coal-based gas wet oxidation desulfurization, in particular to a method for regenerating the desulfurization liquid for coal-based gas wet oxidation desulfurization. Background technique [0002] In recent years, the coal-fired industry and the coking industry have developed rapidly in China, and the application of coal-based gas in the chemical industry has been paid more and more attention. This has also promoted the diversified development of subsequent products that use coal-based gas as raw materials. . Such as: use coke oven gas as raw material to produce methanol, use it as city gas, generate electricity, etc. However, due to the particularity of the composition of coal-based gas, there are many and complex harmful substances, so in order to make better use of coal-based gas, it is necessary to remove these harmful substances as much as possible, such as H 2 S removal. [0003] Wet oxida...

AI Technical Summary

Problems solved by technology

[0020] 1) The suspended sulfur in the regeneration tank is obvious, and the content can generally reach 400-600mg / l, and it is prone to flying bubbles;

[0021] 2) The sulfur foam on the regeneration tank is small and less, and the color of the desulfurization liquid is dark. After a period of use, a large amount of desulfurization liquid must be discharged, wasting water resources, catalysts and soda ash, etc.;

[0022] 3) The air in the regeneration tank is dirty, so that the reaction cannot proceed normally

[0023] 4) In the process of desulfurization liquid regeneration, the amount of catalyst is relatively high