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Method for treating carbon disulfide in viscose fiber production waste gas

A viscose fiber, carbon disulfide technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as environmental pollution

Active Publication Date: 2021-07-30
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]The excellent performance of viscose fiber and the easy availability and renewability of the main raw material cellulose determine that it will have a high demand for a long time, but viscose fiber During fiber production, a large amount of toxic waste gas containing hydrogen sulfide (H2S) and carbon disulfide (CS2) is produced, causing serious pollution to the environment

Method used

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  • Method for treating carbon disulfide in viscose fiber production waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The temperature is 30℃, CS 2 The content is 8225mg / m 3 The raw material gas is continuously sent to the absorption tower, and the CS in the raw material gas in the absorption tower 2 CS sprayed from the upper part of the absorption tower 2 Absorbent HO(CH 2 CH 2 O) 3 CH 2 CH 2 CH 2 CH 3 Absorption, absorption temperature is 30℃, CS 2 The liquid-gas ratio of absorbent and feed gas entering the absorption tower is 6L / m 3 , remove CS 2 The purified gas is sent to the exhaust flue for other treatment; absorb CS 2 The final absorption liquid enters the mixing tank from the bottom of the absorption tower through the pump to be mixed with water, and contains CS after mixing. 2 The mass percentage of water in the mixture with water is 20%; it contains CS 2 The mixed liquid (rich liquid) with water is pumped into the lean-rich liquid heat exchanger from the mixed liquid tank, and after absorbing heat, it enters the first regeneration tower with a bottom temperature ...

Embodiment 2

[0053] Others are the same as in Example 1, the difference is CS 2 The absorbent is HO (CH 2 CH 2 O) 6 CH 3 . CS in purified gas 2 The content is 319mg / m 3 , CS in the feed gas 2 The removal rate was 96.1%.

Embodiment 3

[0055] Others are the same as in Example 1, the difference is CS 2 The absorbent is HO (CH 2 CH 2 O) 4 H. CS in purified gas 2 The content is 576mg / m 3 , CS in the feed gas 2 The removal rate was 93.0%.

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Abstract

The invention provides a method for treating carbon disulfide in viscose fiber production waste gas, and belongs to the technical field of factory waste recycling. The method comprises the following steps: after production waste gas from a viscose fiber production plant passes through an absorption tower containing a CS2 absorbent, an absorption liquid containing CS2 and waste gas without CS2 are obtained; uniformly mixing the CS2 with water through a liquid mixing tank to obtain a mixed liquid containing the CS2 and the water; after passing through a heat exchanger, acquiring a preheated mixed solution containing CS2 and water; after passing through a first regeneration tower, acquiring a CS2 recovery intermediate product and a mixed solution containing part of CS2 and water; after passing through a second regeneration tower, acquiring a CS2 recovery intermediate product and a regenerated CS2 absorbent; condensing and separating the CS2 recovery intermediate product to obtain recovered CS2 and condensed water; sending the recovered CS2 to a CS2 storage tank; conveying condensed water to the liquid mixing tank; enabling the regenerated CS2 absorbent to pass through a heat exchanger to obtain a pre-cooled CS2 absorbent; and cooling and sending the pre-cooled CS2 absorbent to an absorption tower. The sustainable long-term development can be promoted.

Description

technical field [0001] The invention relates to the technical field of recycling and reuse of factory waste, in particular to a method for treating carbon disulfide in waste gas produced by viscose fiber. Background technique [0002] The excellent performance of viscose fiber and the availability and renewability of the main raw material cellulose determine that it will have a high demand for a long time, but in the production of viscose fiber, a large amount of hydrogen sulfide (H 2 S) and carbon disulfide (CS) 2 ) of toxic waste gas, causing serious pollution to the environment. Efficient and economical treatment of waste gas has always been a technical problem in the viscose fiber industry. SUMMARY OF THE INVENTION [0003] In view of this, the present invention provides a method for treating carbon disulfide in waste gas produced by viscose fiber, which has the advantages of low investment, low operating cost, and low cost to CS 2 Good processing effect, CS 2 Remo...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/14B01D53/1425Y02P70/62
Inventor 朱庆松孔令熙王本杰李晓俊
Owner CHINESE TEXTILE ACAD
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