Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sulfur-containing tail gas purifying and recycling method

A tail gas purification and tail gas technology, applied in chemical instruments and methods, sulfur compounds, separation methods, etc., can solve the problems of low economic value and high energy consumption of sodium sulfide products, and achieve the effect of reducing energy consumption and high economic value

Active Publication Date: 2014-02-05
XINZHONGTIAN ENVIRONMENTAL PROTECTION
View PDF2 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What this method its alkali washing obtains is sodium sulfide solution, obtains sodium sulfide product through evaporation, crystallization, separation, energy consumption is high, and the economic value of sodium sulfide product is also relatively low

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
  • Sulfur-containing tail gas purifying and recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] see figure 1 , the implementation process of the inventive method is as follows:

[0026] Firstly, the straight-through sulfur recovery method is used to recover the sulfur-containing tail gas (carbon disulfide tail gas produced from natural gas), according to the O in the air 2 The converted amount is H in the exhaust gas 2 The amount of 1-1.5 times the S content controls the amount of air dosage, so that the tail gas of the once-through sulfur recovery process is mainly hydrogen sulfide.

[0027] 1. Dissolve the purifying agent barium sulfide with steam, let it stand for precipitation and filter, and make a purification solution with a concentration required by the process (concentration is controlled at 25%), store it in the purification solution storage tank, and transport it to the purification treatment with a delivery pump The tower (1 / 3---1 / 2 liquid level of the tower body) is ready for use.

[0028] 2. Pass the tail gas into the purification treatment tower,...

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

The invention relates to a sulfur-containing tail gas purifying and recycling method. The method comprises the following steps: firstly adopting a direct current sulfur recovery method to recover the sulfur-containing tail gas and controlling the air dosage during recovery; then feeding the tail gas to a purifying column with barium sulfide solution, reacting to obtain a barium sulfite precipitate and a barium carbonate precipitate and exhausting the hydrogen sulfide refined gas, feeding the hydrogen sulfide refined gas to three stages of alkali liquor (sodium hydroxide solution) absorption columns in sequence and discharging the gas up to the standard after absorption; finally concentrating the solution to obtain the solution containing 70% of sodium hydrosulfide and flaking, thus obtaining the sodium hydrosulfide product. By adopting the method, the sodium hydrosulfide product which has higher quality and is widely applied to the industries such as mining, tanning and the like can be produced and up-to-standard exhaust of the tail gas can be realized.

Description

technical field [0001] The invention relates to a sulfur-containing waste gas treatment technology and belongs to the technical field of chemical process application. Background technique [0002] Natural gas wet desulfurization tail gas and the use of natural gas to produce carbon disulfide tail gas are mixed gases containing hydrogen sulfide, carbon dioxide and sulfur dioxide. The traditional treatment method generally adopts the direct-flow sulfur recovery process, and the sulfur recovery rate of the direct-flow sulfur recovery process is 92--98%. , and its tail gas needs to be further incinerated and absorbed before it can be discharged. The residue produced by its incineration and absorption is sodium sulfite or sodium metabisulfite, both of which contain impurities such as sodium sulfide and sodium sulfate, which have basically no economic value and need to be further disposed of as hazardous waste. Therefore, the purification rate of the tail gas by this method is no...

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
IPC IPC(8): B01D53/75B01D53/48C01B17/32
CPCY02P20/151
Inventor 周红星
Owner XINZHONGTIAN ENVIRONMENTAL PROTECTION
Features
  • Generate Ideas
  • 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