Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for treating hydrogen sulfide in waste gas produced by viscose fiber

A viscose fiber and hydrogen sulfide technology, applied in the textile field, can solve the problems of high cost of low-concentration waste gas treatment, bad odor that cannot be achieved by enterprises, and high operating costs, so as to promote sustainable long-term development, high safety, and reduce operating costs. cost effect

Active Publication Date: 2022-07-29
CHINESE TEXTILE ACAD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the waste gas treatment of viscose fiber production mainly adopts the alkali washing H of German Lurgi company. 2 S plus activated carbon to adsorb CS 2 The method and the post-combustion sulfuric acid (WSA) method of Denmark Topsoe (Topso) company, these two technologies have large investment and high operating costs, especially for low-concentration waste gas treatment costs are higher, and cannot achieve the purpose of corporate stench control. Therefore, the production of the enterprise often causes dissatisfaction among the residents around the factory area, and even many viscose filament enterprises directly discharge the waste gas without any treatment; 2 The by-product sodium hydrosulfide produced by the S method is a hazardous chemical, which brings certain safety hazards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating hydrogen sulfide in waste gas produced by viscose fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The temperature is 20℃, H 2 S content is 4675mg / m 3 The raw material gas is continuously fed into the absorption tower, and the H in the raw material gas in the absorption tower2 S is sprayed from the upper part of the absorption tower H 2 S absorption liquid absorption, the absorption liquid contains 1.5mol / L ionic liquid [(CH 3 -)(CH 3 CH 2 CH 2 CH 2 -)N-CH 2 CH 2 CH 2 -NH 2 + -CH 2 CH 3 ]CH 3 COO - , the absorption temperature is 30 °C, the removal of H 2 The purified gas after S is sent to the exhaust flue for other treatment; absorbs H 2 The absorption liquid (rich liquid) after S is pumped into the lean-rich liquid heat exchanger from the bottom of the absorption tower, and after absorbing heat, it enters the regeneration tower from the upper part of the regeneration tower for regeneration and desorption of H 2 S, the desorption temperature is 85 °C, the desorption H is 2 The absorption liquid (lean liquid) after S flows out from the bottom of the...

Embodiment 2

[0044] Others are the same as in Example 1, except that the ionic liquid in the absorbing solution is [(CH 3 -)(CH 3 CH 2 CH 2 CH 2 -)N-CH 2 CH 2 CH 2 -NH 2 + -CH 2 CH 3 ]PF 6 - . H in the purified gas 2 S content is 96mg / m 3 , H in the feed gas 2 The removal rate of S was 97.9%.

Embodiment 3

[0046] Others are the same as in Example 1, except that the ionic liquid in the absorbing solution is [(CH 3 -)(CH 3 CH 2 CH 2 CH 2 -)N-CH 2 CH 2 CH 2 -NH 2 + -CH 2 CH 3 ]BF 4 - . H in the purified gas 2 S content is 89mg / m 3 , H in the feed gas 2 The removal rate of S was 98.1%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed is a method for treating hydrogen sulfide in waste gas produced by viscose fiber, which belongs to the technical field of textiles. It includes the following steps: obtaining waste gas from viscose fiber production plant; 2 After the absorption tower of the S absorption liquid, the H containing 2 Absorption of S and removal of H 2 Exhaust gas of S; said containing H 2 After the absorption liquid of S passes through the heat exchanger to absorb heat, the heated H-containing liquid is obtained. 2 The absorption solution of S; the heated liquid containing H 2 After the absorption liquid of S is regenerated and desorbed by the regeneration tower, H is obtained. 2 S recovers intermediates and regenerated H 2 S absorption liquid; the H 2 S recovered intermediate product is cooled and gas-liquid separated to obtain recovered H 2 S and condensed water; the recovered H 2 S to H 2 S storage tank; the condensed water is sent to the regeneration tower. It has the advantages of less investment, safe operation, low cost, 2 S treatment effect is good, H 2 S removal rate ≥ 95% and adapt to low H 2 S concentration viscose waste gas treatment.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for treating hydrogen sulfide in waste gas produced by viscose fiber. Background technique [0002] The excellent performance of viscose fiber and the easy availability and renewability of the main raw material cellulose determine that it will have 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 ), causing serious pollution to the environment. Efficient and economical treatment of waste gas has always been a technical problem in the viscose fiber industry. At present, the waste gas treatment of viscose fiber production mainly adopts alkaline washing H of German Lurgi Company. 2 S plus activated carbon adsorption of CS 2 method and the post-combustion sulfuric acid (WSA) method of Topso Company in Denmark, these two technologies have large investment and high operating costs, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1493B01D53/1468B01D53/1425B01D2257/304
Inventor 朱庆松谢和平孔令熙李晓俊甘丽华
Owner CHINESE TEXTILE ACAD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com