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

Method for removing SO2 in gas

A technology for removing gas and SO2, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of large water consumption, low removal efficiency, secondary pollution desulfurization effect, etc. Effect

Inactive Publication Date: 2017-09-15
QINGDAO UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dry desulfurization and desulfurization agents mainly include activated carbon, iron oxide, zinc oxide, manganese oxide, etc., which have problems such as low removal efficiency and non-renewable absorbents.
Wet desulfurization includes water washing method, limestone / gypsum method, sodium alkali method, double alkali method and ammonia method, etc. Among them, water washing method has large water consumption, water resources cannot be recycled, secondary pollution caused by sulfur-containing sewage and poor desulfurization effect and other problems; limestone / gypsum method has problems such as large equipment investment, solid deposits that cause easy scaling and blockage of equipment, and serious wear and tear of equipment parts; sodium-alkali method and double-alkali method have high alkali consumption and difficult repetition of absorbents Use and other problems; while the ammonia method has problems such as absorbent ammonia escape and aerosols

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: with tetrahydroxyethylethylenediamine and H 3 PO 4 The ammonium salt aqueous solution generated by the equimolar ratio reaction is the absorbent, the molar concentration of the absorbent ammonium salt aqueous solution is 0.3mol / L, the absorbent is put into the desulfurization absorption tower, and the volume concentration of 4.5% is continuously introduced from the bottom of the tower at 30°C SO 2 Air mixture, SO 2 The tail gas after the desulfurization and absorption of the absorption tower is measured by the flue gas detector. 2 The gas concentration, when measured SO in the tail gas after absorption 2 When the gas volume concentration is 200ppm, stop the introduction of the mixed gas, and use the iodometric method to measure the SO in the absorbent ammonium salt solution. 3 2- and HSO 3 - The molar concentration is 0.219mol / L, and the absorbed absorbent ammonium salt solution desorbs SO at 102°C under normal pressure. 2 60min, and use the iodome...

Embodiment 2

[0023] Embodiment 2: with tetrahydroxypropyl ethylenediamine and H 3 PO 4 The ammonium salt aqueous solution generated by the equimolar ratio reaction is the absorbent, the molar concentration of the absorbent ammonium salt aqueous solution is 0.3mol / L, the absorbent is put into the desulfurization absorption tower, and the volume concentration of 4.5% is continuously introduced from the bottom of the tower at 30°C SO 2 Air mixture, SO 2 The tail gas after the desulfurization and absorption of the absorption tower is measured by the flue gas detector. 2 The gas concentration, when measured SO in the tail gas after absorption 2 When the gas volume concentration is 200ppm, stop the introduction of the mixed gas, and use the iodometric method to measure the SO in the absorbent ammonium salt solution. 3 2- and HSO 3 - The molar concentration is 0.225mol / L, and the absorbed absorbent ammonium brine solution desorbs SO at 102°C under normal pressure 2 60min, and use the iodo...

Embodiment 3

[0024] Embodiment 3: the aqueous solution of ammonium salt in embodiment 1 is absorbent, under the condition of embodiment 1, after carrying out absorption and desorption repeated use 34 times, reuse for absorbing SO 2 , when SO in exhaust gas after absorption is measured 2 When the gas volume concentration is 200ppm, stop the introduction of the mixed gas, and use the iodometric method to measure the SO in the absorbent ammonium salt solution. 3 2- and HSO 3 - The molar concentration is 0.174mol / L, and the absorbed absorbent ammonium salt solution desorbs SO at 102°C under normal pressure. 2 60min, and use the iodometric method to measure the desorption SO 2 SO in postabsorbent ammonium brine solution 3 2- and HSO 3 - The molar concentration is 0.0035mol / L, and the calculated desulfurization rate is 99.80%, and the desorption rate is 97.99%. The desorbed absorption solution is used again to absorb SO 2 , when SO in exhaust gas after absorption is measured 2 When th...

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

A method for removing SO2 in gas is characterized in that tetrahydroxyethyl-ethylene diamine or tetrahydroxypropyl-ethylene diamine, H3PO4 and the like are subjected to molar reaction to generate ammonium salt water solution serving as an absorbent, the absorbent contacts with the gas containing the SO2 to remove the SO2 by absorption, the molar concentration of the ammonium salt water solution serving as the absorbent is 0.2-0.5mol / L, the volume concentration of the SO2 in the absorbed gas is 0.5-99%, absorption temperature is 0-70 DEG C, the saturated ammonium salt water solution desorbs the SO2 by heating under normal pressure after absorbing the SO2, so that the saturated ammonium salt water solution can be reused, SO2 desorption temperature is 70-102 DEG C, and SO2 desorption time is 20-120 minutes. Compared with the prior art, the method has the advantages that the absorbent is good in desulfurization performance and recycling performance, the saturated absorbent easily desorbs the SO2 after absorbing the SO2, and the absorbent is easily dissolved in water and free from saturated vapor pressure and avoids the problems of equipment blockage due to scaling and the like.

Description

technical field [0001] The invention relates to a method for removing SO in gas 2 method, specifically related to the removal of flue gas, containing SO 2 SO in waste gas and / or industrial feed gas 2 . Background technique [0002] With the rapid development of industry, flue gas, containing SO 2 exhaust emissions are increasing day by day. Contains SO 2 The discharge of waste gas has brought serious harm to the ecological environment, such as the formation of acid rain, acidification of water quality, respiratory diseases, etc. Countries around the world are concerned about flue gas, containing SO 2 More and more attention has been paid to the emission of exhaust gas, and researchers are also trying to control flue gas, containing SO 2 Great efforts have been made in the emission of exhaust gases. However, so far flue gas, containing SO 2 Exhaust gas desulfurization technology is still an important problem to be solved urgently. [0003] Existing flue gas, contain...

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 Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1481B01D2252/204
Inventor 刘仕伟徐学基李露于世涛解从霞刘福胜宋修艳
Owner QINGDAO UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com