Equipment and method for processing gas absorbed by film

Abstract

The present invention provides a gas absorption-separation membrane device and a method thereof. Stock solution at a given temperature is contacted with a drainage porous membrane; the absorbed gas under the driving of the blew compressed air or the side sub-pressure of the membrane passes through the porous membrane in gas-status way, and is removed and absorbed for collection at the other side of the membrane. An immersion-typed drainage hollow fiber membrane component is adopted. The compressed air is blown in with an aerated conduit, so as to control the membrane pollution, to obtain the stock solution that is contacted with the membrane and has uniform temperature and concentration, and to provide driving pressure for the air transmission. The membrane leakage problem is resolved by adopting a dual-valve mechanism during the membrane absorption process.

Description

technical field [0001] The invention relates to a membrane gas absorption treatment method and a treatment device. Background technique [0002] In the field of gas absorption, stripping with air is a traditional method. The air is sent in from the side and moved to the center of the tower, and then the air is discharged from the center of the tower by a fan installed on the upper part of the tower. This method is simple to operate and has high reliability, but it consumes a lot of energy and occupies a large area. [0003] A large amount of low-concentration waste ammonia is produced in the production process of the synthetic ammonia plant. The alkali-adding process is used to decompose the fixed ammonia into volatile ammonia and then stripped by steam. The process is simple, the effect is good, and there is no secondary pollution. The disadvantage is that the energy consumption is large and the treatment cost is high. [0004] Although these traditional contacting device...

AI Technical Summary

Problems solved by technology

[0020] (2) The inhomogeneity of shell side fluid distribution affects the mass transfer efficiency;

[0024] (6) The problem of critical breakthrough pressure

However, since the fibers are usually packed unevenly in the parallel flow module, this can easily lead to uneven distribution of the shell-side fluid, which in turn affects the mass transfer efficiency.

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