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

Wet redox, desulfuration and resource utilization method for flue gas

A technology of wet oxidation and recycling, which is applied in chemical instruments and methods, separation methods, and through absorption. It can solve the problems of high investment and operating costs, large water consumption, and large floor space, and achieve huge economic benefits.

Inactive Publication Date: 2013-04-03
HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the wet FGD process are that the equipment is huge, the floor area is large, the investment and operation costs are high, the water consumption is large, and there is secondary pollution.

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
  • Wet redox, desulfuration and resource utilization method for flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 125mL of a ferric chloride solution with a hydrogen ion concentration of 1mol / L and a ferric iron concentration of 2.0mol / L, and pass sulfur dioxide into it at 30°C and 1 atm. The input amount is 0.125mol, and the reaction time is 0 -1.5h, the absorption liquid becomes shallow. The test result is: hydrogen ion concentration=1.56mol / L, Fe 2+ =1.47mol / L, and the sulfate concentration is 0.81mol / L.

[0028] Excessive oxygen is introduced into the solution produced after absorbing sulfur dioxide, so that the divalent iron in the solution becomes trivalent iron, and the obtained trivalent iron solution is recycled for absorbing sulfur dioxide.

[0029] Repeat the foregoing operations and after three cycles, the obtained high-concentration sulfate solution is concentrated, separated and crystallized to obtain 63.5 g of iron sulfate product containing crystal water. The mother liquor after crystallization is a mixture of sulfuric acid and hydrochloric acid, and iron oxide or ...

Embodiment 2

[0031] Take 250 mL of a ferric chloride solution with a hydrogen ion concentration of 0.64 mol / L and a ferric iron concentration of 1.0 mol / L, and pass sulfur dioxide into it at 30°C and 1 atmosphere. The input amount is 0.125 mol, and the reaction time is 0-1.5h, the absorption liquid becomes shallow. The test result is: hydrogen ion concentration=1.07mol / L, Fe 2+ =0.86mol / L, the sulfate concentration is 0.45mol / L.

[0032] Excess oxygen is passed into the solution produced after absorbing sulfur dioxide, so that the divalent iron in the solution becomes trivalent iron, and the obtained trivalent iron solution is recycled for absorbing sulfur dioxide.

[0033] Repeat the foregoing operation, after three cycles, the obtained high-concentration sulfate solution is concentrated, separated and crystallized to obtain 59.2 g of iron sulfate product containing crystal water. The mother liquor after crystallization is a mixture of sulfuric acid and hydrochloric acid, and iron oxide or hy...

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 wet redox, desulfuration and resource utilization method for flue gas. The method comprises the following steps of: leading the flue gas containing SO2 into an acidic ferric iron absorption liquid, and absorbing sulfur dioxide at 0 to 100 DEG C to generate a sulfate solution so as to finally realize a flue gas desulfurization purpose; after dissolving the sulfur dioxide into water, oxidizing the sulfur dioxide by ferric iron to generate a ferrous sulfate solution; leading an oxidant into the solution to carry out oxidization on the solution, transferring ferrous iron into ferric iron which is used for circularly absorbing the sulfur dioxide in the flue gas; and timely carrying out separation, purification and crystallization on absorption liquid when the concentration of sulfate radical in the absorption liquid obtained from flue gas desulfurization is obviously improved after multiple cycles. Therefore, the resource utilization of the flue gas is realized.

Description

Technical field [0001] The invention relates to a flue gas purification method, in particular to a flue gas wet redox desulfurization and resource utilization method. Background technique [0002] The gas produced by fuel combustion contains sulfur oxides, which are harmful components, mainly sulfur dioxide and a trace amount of sulfur trioxide. The process of eliminating sulfur dioxide and purifying exhaust gas is called desulfurization. [0003] There are three ways to apply desulfurization technology at home and abroad: desulfurization before combustion, desulfurization during combustion and desulfurization after combustion. The pre-combustion desulfurization is mainly to clean the raw coal used in the boiler by physical, chemical or biological methods, to remove the sulfur part of the coal, so that the coal can be purified; the combustion desulfurization technology is to perform desulfurization treatment during the coal combustion process, namely The coal is mixed with a sulf...

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): B01D53/78B01D53/50
CPCY02C10/06Y02C20/40Y02P20/151
Inventor 田文学贾汉东李慧陈晨
Owner HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION 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