Method and device for removing CO2 in fire coal fume based on CO2 circulating carried gas

A technology of coal-fired flue gas and circulating carrier gas, which is applied in the direction of combined devices, separation methods, chemical instruments and methods, etc., can solve the problems of high operating cost of carbon dioxide, reduced power generation efficiency of power plants, low carbon dioxide removal rate, etc., and achieve environmental protection Significant benefits, reduced system operating costs, simple process

Inactive Publication Date: 2009-12-23
DONGHUA UNIV
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Problems solved by technology

The main problems of various carbon dioxide separation and recovery methods are: high energy consumption, which will greatly reduce the power generation efficiency of the power plant; slow absorption speed, high operating cost of carbon dioxide removal; small absorption capacity; low carbon dioxide removal rate, etc.

Method used

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  • Method and device for removing CO2 in fire coal fume based on CO2 circulating carried gas

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Embodiment

[0023] Such as figure 1 As shown, the present invention is implemented based on a CO 2 Removal of CO from coal-fired flue gas by circulating carrier gas 2 The device of method is made up of first stage fluidized bed reactor (1), second stage fluidized bed reactor (3), first stage cyclone separator (2) and second stage cyclone separator (4) and carbon dioxide storage Gas tank (5) is formed.

[0024] (1) When the inventive method is purifying the flue gas, the coal-fired flue gas enters the first-stage fluidized-bed reactor (1) through the bottom flue gas inlet of the flue gas first-stage fluidized-bed reactor (1); At the same time, part of the carbon dioxide gas collected in the gas storage tank (5) is used as the fluidizing gas of the first-stage fluidized bed reactor (1), and the fluidized gas at the bottom of the first-stage fluidized bed reactor (1) is The inlet enters the first stage fluidized bed reactor (1);

[0025] (2) The potassium-based absorbent in the first-sta...

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Abstract

The invention relates to a method and a device for removing CO2 in fire coal fume based on CO2 circulating carried gas, being characterized in that: when fume is purified, partial CO2 gas stored in a gas storage tank is taken as the fluidization gas of a first fluidized bed reactor, then a potassium radical absorber is used for removing the CO2 in fire coal fume and the CO2 as the fluidization gas of the first fluidized bed reactor out to be stored in the gas storage tank for recycling; the potassium radical absorber is used for removing the CO2 in the first fluidized bed reactor, and the potassium radical absorber can be regenerated and recycled. The removing method of the invention is simple in process, can realize near zero emission of CO2, thus greatly reducing the running cost of the system and having obvious environment benefit.

Description

technical field [0001] The invention belongs to the technical field of purification of coal-fired flue gas, in particular to a CO-based 2 Removal of CO from coal-fired flue gas by circulating carrier gas 2 method and device. Background technique [0002] Atmospheric greenhouse effect is one of the most important environmental problems faced by human beings. Carbon dioxide is the main greenhouse gas, and thermal power plants are a concentrated source of carbon dioxide emissions, accounting for about 30% of the total carbon dioxide emissions caused by human activities. A 600MW thermal power plant can emit up to 500 tons of carbon dioxide per hour. Therefore, in order to reduce the carbon dioxide content in the atmosphere, the most important thing is to reduce the amount of carbon dioxide discharged into the atmosphere from the exhaust gas of power plant boilers. All countries in the world, especially developed countries, attach great importance to the research and developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00
Inventor 刁永发沈猛刘赟张春阳许洁
Owner DONGHUA UNIV
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