Oxidation air uniform-distribution device for calcium desulphurization

Abstract

The invention provides an oxidation air uniform-distribution device for calcium desulphurization. The device comprises an air feed main pipe, a plurality of air feed branch pipes and a connecting pipe, wherein each of the air feed main pipe and the air feed branch pipes is a straight pipe with two open ends, the vertical axis of each air feed branch pipe is perpendicular to the vertical axis of the air feed charge, the connecting pipe is an annular pipe, one open end of the air feed main pipe is an air inlet end, the other open end of the air feed main pipe is communicated with the connecting pipe, every two adjacent air feed branch pipes are arranged in parallel at an equal interval, one open end of each air feed branch pipe is communicated with the air feed main pipe, the other open end of each air feed branch pipe is communicated with the connecting pipe, and the sidewall of each air feed branch pipe is uniformly provided with oxidation air jet holes. The uniform-distribution device provided by the invention enables air flow and air pressure of air flowing through each air jet hole to be more uniform and more stable, thereby improving the oxidation effect of calcium sulfite and the utilization rate of oxidation air.

Description

technical field [0001] The invention relates to an oxidation air distribution device used in limestone gypsum desulfurization in a desulfurization absorption tower. Background technique [0002] In the limestone gypsum desulfurization process, in order to obtain better quality desulfurization by-product gypsum products, the intermediate product calcium sulfite must be forcibly oxidized. The higher the oxidation efficiency, the better the quality of gypsum. At present, the most widely used method is to use in-situ forced oxidation, which can save space and make the system layout more concise. There are many kinds of forced oxidation devices in different ways to introduce the oxidation air into the oxidation zone of the tank and disperse it, but the two most commonly used methods are the pipe network spray type, also known as the fixed air sparger (Fixed Air Sparger, FAS) and Agitator Air Lance Assemblies (ALS). [0003] FAS is at a certain depth of the reaction tank (usuall...

AI Technical Summary

Problems solved by technology

In actual operation, there is often insufficient air pressure and air volume at the end of the branch pipe. Therefore, although the air nozzle holes are arranged very uniformly, the air volume passing through each nozzle is not necessarily uniform, which eventually leads to the oxidation air on the cross section of the desulfurization tower slurry pool. The distribution uniformity becomes worse, the oxidation effect is not good in some areas, and the quality of desulfurized gypsum cannot be guaranteed

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