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Method for synchronous desulphurization, denitration dedusting and emission reduction of carbon dioxide by fire coal and flue gas

A technology of carbon dioxide, desulfurization and denitrification, applied in the directions of carbon monoxide, chemical instruments and methods, separation methods, etc., can solve the problems of inability to change the growth trend of total carbon dioxide emissions, impossible to implement in power plants, and ineffective for fine dust. , to avoid huge costs and corresponding risks, avoid transshipment costs and storage risks, and reduce capture costs

Inactive Publication Date: 2014-11-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Treatment of acid gas has doubled the cost of thermal power generation, and the minimum cost of capturing carbon dioxide is equivalent to doubling the price of coal, so it is impossible for power plants to be implemented, let alone capture all the carbon dioxide emitted by power plants It also cannot change the growth trend of total carbon dioxide emissions, because concentrated emissions are less than half of total carbon dioxide emissions
There is no effective technical means for fine dust represented by PM2.5

Method used

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  • Method for synchronous desulphurization, denitration dedusting and emission reduction of carbon dioxide by fire coal and flue gas
  • Method for synchronous desulphurization, denitration dedusting and emission reduction of carbon dioxide by fire coal and flue gas

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Experimental program
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Effect test

Embodiment 1

[0038] Using carbonized corncobs as inorganic carbon, simulated flue gas (CO 2 Content 10.13%, SO 2 Content 1500ppm, NO content 360ppm, the rest is N 2 ) for reduction experiments. The simulated flue gas does not contain solid dust.

[0039] 1. Gas heating up

[0040] Raise the simulated flue gas temperature to 700-745°C.

[0041] 2. Reduction reaction

[0042] The heated gas enters the reactor filled with carbonized corn cobs. The temperature of the reactor is 700-745°C. Part of the carbon dioxide in the gas undergoes a reduction reaction with the carbon filled in the reactor to generate carbon monoxide. The resulting reducing atmosphere will simulate the carbon monoxide in the flue gas. Trace SO 2 and NO x Complete reduction, since SO is no longer detectable after the gas-solid reactor 2 and NO.

[0043] 3. Step by step cooling

[0044] The gas at the outlet of the reactor enters the first cooler to cool down to 200-400 °C, the water vapor does not condense, but th...

Embodiment 2

[0048] Using carbonized corncobs as inorganic carbon, simulated flue gas containing oxygen (CO 2 Content 7.48%, O 2 Content 4.61%, SO 2 The content is 830 ppm, the NO content is 700 ppm, and the rest is N 2 ). Repeat the above experiment, the operation steps are the same as in Example 1, and the results are also the same.

Embodiment 3

[0050] Using carbonized corncobs as inorganic carbon, simulated flue gas containing water (CO 2 Content 10.32%, SO 2 Content 1500ppm, NO content 360ppm, the rest is N 2 ) to repeat the above experiment. Water was added using a microsyringe in an amount equal to half the moles of carbon dioxide. First 2 operation steps are identical with embodiment 1, namely:

[0051] 1. Gas heating up

[0052] Raise the simulated flue gas temperature to 700-745°C.

[0053] 2. Reduction reaction

[0054] The heated gas enters the reactor filled with carbonized corncobs. The temperature of the reactor is 700-745°C. Part of the carbon dioxide in the gas undergoes a reduction reaction with the carbon filled in the reactor to generate carbon monoxide, and part of the water vapor is reduced to hydrogen. The resulting reducing atmosphere will simulate the trace amount of SO in the flue gas 2 and NO x Complete reduction, since SO is no longer detectable in the gas after the gas-solid reactor ...

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Abstract

The invention relates to a method for synchronous desulphurization, denitration dedusting and emission reduction of carbon dioxide by fire coal and flue gas, which comprises the following steps: cyclone dust collection, heating by flue gas, reduction by carbon for desulphurization and denitration, two-grade cooling for recovering sulphur, dedusting, collecting, heating of carbon dioxide and reduction. According to the invention, desulphurization and denitration treatment are simple and thoroughly, collection cost of carbon dioxide is reduced, and no secondary pollutant is generated, the byproduct has good market value, and zero discharge is realized. According to the invention, individual desulphurization and denitration treatment can be avoided, separating cost of carbon dioxide is reduced, cost and risk of transhipment and burying of carbon dioxide can be avoided, the produced CO is a C1 chemical important raw material, and the method has good economic benefit.

Description

technical field [0001] The invention relates to a method for purifying coal-burning flue gas, in particular to a method for synchronous desulfurization, denitrification and dust removal of coal-fired flue gas and reduction of carbon dioxide emission. Through the present invention, coal-fired boilers such as power generation and heating do not discharge sulfur and nitrogen oxides and tiny particles to the atmosphere, and also do not discharge carbon dioxide and produce secondary pollutants, and all by-products have market value. Background technique [0002] The land of China is often shrouded in smog. The generation of smog is related to my country's energy structure. my country's coal-fired electricity is close to 80%, and this situation is unlikely to change fundamentally in a short period of time. Coal is also a major source of energy around the world. At present, about 41% of the world's electricity is provided by coal, and by 2030 the proportion of global coal power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/62B01D53/60B01D50/00C01B17/04C01B31/18C01B32/40
CPCY02A50/20Y02C20/40Y02P20/151
Inventor 周理周亚平苏伟孙艳
Owner TIANJIN UNIV
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