Equipment and method for processing gas absorbed by film

A gas treatment and membrane absorption technology, applied in separation methods, chemical instruments and methods, and pervaporation, etc., can solve problems affecting mass transfer efficiency, uneven distribution of shell-side fluids, and uneven distribution of shell-side fluids, etc. The effect of large contact area of ​​membrane, control of membrane fouling, and reduction of concentration polarization and temperature difference polarization

Inactive Publication Date: 2008-12-24
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
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  • Application Information

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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 fibe

Method used

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  • Equipment and method for processing gas absorbed by film
  • Equipment and method for processing gas absorbed by film
  • Equipment and method for processing gas absorbed by film

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Embodiment Construction

[0041] Such as Figure 4 , the membrane absorption device of the present invention comprises: reaction tank 2, the feed liquid inlet 1 that is arranged on the reaction tank 2, air inlet 9, the submerged hydrophobic hollow fiber membrane gas-liquid separator 3 that is arranged in the reaction tank 2, is arranged on The perforated aeration tube 4 for controlling membrane pollution at the lower part of the separator 3, the absorption liquid container 5 arranged outside the reaction tank, and the negative pressure pump 6 is arranged behind the outlet 5 of the absorption liquid container, which adopts negative pressure suction to absorb the gas It is introduced into the absorption liquid container 5 for absorption and collection. Alternatively, compressed air is blown through the perforated aeration tube 4 to sweep the absorbed gas through the membrane and enter the absorption liquid container 5 for absorption and collection. During compressed air purging, the negative pressure pu...

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/30B01D61/36
Inventor 吕晓龙
Owner TIANJIN POLYTECHNIC UNIV
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