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Process for adsorbing acidic gas (CO2) from fume by ammonia water

A technology of acidic gas and flue gas, applied in the direction of separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problems of weakening the transfer efficiency and short fertilizer effect period, so as to improve the nitrogen utilization rate, extend the fertilizer effect period, The effect of low production cost

Inactive Publication Date: 2005-06-01
国家电站燃烧工程技术研究中心 +1
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Problems solved by technology

The disadvantage of the emission reduction route using ammonium bicarbonate as fertilizer is that the fertilizer effect period is short (3 to 15 days), which means that it will be lost with the volatilization of ammonia in a very short period of time.
CO 2 It will also quickly enter the atmosphere, weakening the transfer efficiency

Method used

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  • Process for adsorbing acidic gas (CO2) from fume by ammonia water

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Experimental program
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Embodiment

[0034] Implement the operation steps of the present invention as follows:

[0035] 1. After dust removal, the flue gas produced by combustion is first cooled by the cooling device, and the bellows heat exchanger or cold exhaust heat exchanger is used to cool down according to the amount of flue gas in the power plant and the temperature;

[0036] 2. The flue gas after cooling is pressurized by the blower and sent into the gas cabinet. On the one hand, the gas cabinet is used as a system buffer device; on the other hand, to further reduce the content of suspended solids in the flue gas, gas tanks can also be used. gas container;

[0037] 3. The cooling flue gas is extracted from the gas cabinet, and after being pressurized to 1 to 12 absolute atmospheric pressures by an air compressor (5 absolute atmospheric pressures in this embodiment), it is changed from negative pressure to positive pressure. Feeding, the height of the liquid level in the carbonization tower depends on the...

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Abstract

A process for using ammonia water to absorb the acidic gas (CO2) from fume includes dusting and cooling fume, pressurizing, filling it into gas chamber, filing the solution of acidic gas absorbent into carbonizing tower from its top, filing said fume from tower bottom, reaction while controlling temp, discharging liquid from tower bottom and fume from tower top, aging the solid-liquid mixture, cooling, separation to obtain solid N fertilizer and supernatant, pressuring said discharged fume, filling it into cleaning tower to remove CO2 and NH3, discharging it in atmosphere, adding clean water to cleaning tower, discharging it from bottom, mixing it with said supernatant, increasing ammonia concentration, and adding other component to obtain acidic gas absorbent.

Description

technical field [0001] The invention relates to an environment-friendly and energy-saving production technology, in particular ammonia water absorbs CO in flue gas 2 Acid gas method. Background technique [0002] Greenhouse gas - CO 2 More and more people pay more and more attention to the emission and emission reduction method, which is a worldwide hot issue in the prior art. Because CO 2 It is the most produced greenhouse gas. Its greenhouse effect has the possibility of changing the earth's climate in the short term to a great extent, according to the existing CO 2 Emission rates, CO in the global atmosphere in the mid-21st century 2 The concentration may be doubled (that is, twice the current level). According to the estimates of the International Control Committee on Climate Change (IPCC), this will lead to global warming, with an increase in temperature of 1.5-4.5°C and a global average sea level rise of 0.25-0.5m. Combustion of fossil fuels is CO 2 major source...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/62B01D53/79
CPCY02A50/20Y02C20/40
Inventor 李振中李欣向哲愚李成之张志明周志强张经武陈冠雄张昀徐慧
Owner 国家电站燃烧工程技术研究中心
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