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Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same

A technology for strengthening absorption and acetic acid, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of poor absorption effect, low space utilization, large equipment volume, etc., to achieve fast update speed, start and stop time The effect of short, small device size

Inactive Publication Date: 2012-03-21
SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of large equipment volume, low space utilization rate and poor absorption effect in the existing acetic acid tail gas recovery process of methyl iodide, the present invention provides a device and a process for strengthening the absorption of methyl iodide in acetic acid tail gas

Method used

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  • Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same
  • Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same
  • Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same

Examples

Experimental program
Comparison scheme
Effect test

example example 1

[0026] Start the enhanced absorption equipment 4, adjust the rotating packing speed to 300r / min, and stabilize for 5 minutes, adjust the inlet valve 3 to introduce the acetic acid tail gas from the acetic acid absorption tower 1 into the enhanced absorption equipment 4 through the gas flow meter 2, and the tail gas flow rate is 18Nm 3 / h; At the same time, adjust the inlet valve 10 to send the acetic acid absorption liquid from the absorption liquid storage tank 7 to the enhanced absorption device 4 via the feed pump 8 and the liquid flow meter 9, and the flow rate of the acetic acid absorption liquid is 100 kg / h. After the system was stable for 30 minutes, the mass content of methyl iodide in the acetic acid absorption solution at the outlet was measured to be 430 ppm.

example example 2

[0028] Under the operation of Example 1, the rotational speed of the rotating packed bed was adjusted to 600r / min, and other conditions were unchanged. After the system was stable for 30 minutes, the mass content of methyl iodide in the acetic acid absorption solution at the outlet was measured to be 500 ppm.

example example 3

[0030] Under the operation of Example 1, the flow rate of the pure acetic acid absorption liquid was adjusted to 300 kg / h, and other conditions were unchanged. After the system was stable for 30 minutes, the mass content of methyl iodide in the acetic acid absorption liquid at the outlet was measured to be 220 ppm.

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Abstract

The invention provides a device capable of enhancing the absorption of methyl iodide in acetic acid tail gas and a technology for recovering with the device. The device comprises an enhanced absorption device, and is characterized in that the enhanced absorption device comprises a casing; a rotating drum is arranged inside the inner chamber of the casing; cylindrical rotary filling material is arranged in the rotating drum; a liquid distributor is arranged in the central position of the inner chamber of the casing; the liquid distributor is positioned in an inner ring of the rotary filling material, and a gap is formed between the liquid distributor and the inner ring of the rotary filling material; a rotating shaft is arranged at the lower part of the rotating drum; in addition, the rotating shaft and the rotating drum are connected in a concentric manner, and the lower end of the rotating shaft penetrates out of the casing and is connected with a rotating power structure. The invention overcomes the defects of an acetic acid absorption tower, has the advantages of high space utilization rate, short material retention time and high absorption accuracy, is easy to operate, and can open up a new way to recover methyl iodide in acetic acid tail gas.

Description

Technical field [0001] The invention belongs to the technical field of acetic acid technology, and specifically relates to a device and a process for recovering methyl iodide from acetic acid tail gas under supergravity. Background technique [0002] Acetic acid is one of the most important organic acids. It is mainly used to synthesize vinyl acetate, cellulose acetate, acetate, metal acetate, etc. It is also an important raw material for pharmaceuticals, dyes, pesticides, photosensitive materials and other organic synthesis. Mature acetic acid production processes include acetylene acetaldehyde method, ethanol acetaldehyde method, ethylene acetaldehyde method, butane oxidation method and methanol low-pressure carbonyl synthesis method. The acetylene acetaldehyde method has been eliminated due to serious mercury pollution; the ethanol acetaldehyde method and the ethylene acetaldehyde method have also been eliminated abroad due to the backward production process and high cost; the...

Claims

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Application Information

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IPC IPC(8): B01D53/18
Inventor 杨积志李海波单祥雷
Owner SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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