Method for processing waste gas from the production of viscose chemical fiber

A technology for viscose chemical fiber and waste gas treatment, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc. It can solve the problems of poor economic benefits, large investment, and small investment in adsorption methods, and achieve low cost and reduced risk factor , cheap effect

Inactive Publication Date: 2009-09-16
MANASI AOYANG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of the combustion method is that it is more thorough, but the disadvantage is that the investment is large and the economic benefits are poor; the investment of the adsorption

Method used

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  • Method for processing waste gas from the production of viscose chemical fiber

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Example Embodiment

[0021] Example 1

[0022] (1) Waste gas from Xinaoyuan, spinning and acid production lines is sent to the scrubber through a fan;

[0023] (2) Preparation of sodium hydrosulfide by leaching: add 205-200g / L NaOH to the washing tower for three leaching, reaction equation: NaOH+H 2 S→NaHS+H 2 O, cooling the gas after rinsing;

[0024] (3) Absorption: The gas after cooling is mainly CS 2 , Sent to the adsorption tank for adsorption regeneration, the adsorption material used is activated carbon, the remaining gas after adsorption is discharged into the atmosphere, and then the steam flow is passed to desorb the activated carbon;

[0025] (4) Condensation: CS after desorption 2 The gas is sent to the condenser for condensation;

[0026] (5) Recovery: The liquid CS after condensation 2 And water are sent to the separator, and the liquid CS 2 Separated from water, where CS 2 Liquid is fed into CS 2 In the storage tank, the water is drained, and the remaining uncondensed mixed gas is conde...

Example Embodiment

[0030] Example 2

[0031] (1) The waste gas generated by the spinning machines in the first and second phases is sent to the scrubber through a fan;

[0032] (2) Prepare sodium hydrosulfide by leaching: add 200-280g / L Na in the scrubber 2 S is rinsed three times, reaction equation: Na 2 S+H 2 S→NaHS, cooling the gas after leaching;

[0033] (3) Absorption: The gas after cooling is mainly CS 2 , Sent to the adsorption tank for adsorption regeneration, the adsorption material used is activated carbon, the remaining gas after adsorption is discharged into the atmosphere, and then the steam flow is passed to desorb the activated carbon;

[0034] (4) Condensation: CS after desorption 2 The gas is sent to the condenser for condensation;

[0035] (5) Recovery: The liquid CS after condensation 2 And water are sent to the separator, and the liquid CS 2 Separated from water, where CS 2 Liquid is fed into CS 2 In the storage tank, the water is drained, and the remaining uncondensed mixed gas...

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Abstract

The invention discloses a method for processing waste gas from the production of viscose chemical fiber, which relates to the field of the waste gas processing method. Currently, two methods employed to process the waste gas from the production of viscose chemical fiber are as follows: one is a combustion method and the other is an adsorption method, wherein the combustion method has the advantage that the wastes gas is processed more thoroughly and the defects that the investment is large and economic benefit is poor; the adsorption method has advantages of relatively small investment and obvious economic benefit, not only solves the environmental problems, but also brings objective economic benefit to enterprises. The waste gas from the production of viscose chemical fiber is successively washed by NaOH or Na2S, cooled, adsorbed by active carbon, desorbed and condensed to remove H2S in the waste gas and recover CS2 for production. The invention has the advantages of safety, low cost and high recovery efficiency.

Description

technical field [0001] The invention relates to the field of waste gas treatment methods, in particular to a method for treating waste gas from viscose chemical fiber production. Background technique [0002] The exhaust gas produced in the production of viscose contains a large amount of H 2 S and CS 2 Gas, CS required per ton of viscose produced 2 Calculated on the basis of 150-200Kg, the annual output of domestic viscose is 1.5 million tons, the recovery rate of ordinary condensation recovery method is 40%, and the annual emission of 220,000-300,000 tons of H into the atmosphere 2 S and CS 2 Gas is a great pollution to the environment, and at the same time brings a heavy burden to the enterprise. [0003] At present, there are two methods to deal with waste gas from viscose fiber production: one is combustion method and the other is adsorption method. The advantage of the combustion method is that it is more thorough, but the disadvantage is that the investment is la...

Claims

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Application Information

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IPC IPC(8): B01D53/52B01D53/48B01D53/78B01D53/04
Inventor 迟建
Owner MANASI AOYANG TECH CO LTD
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