Indirect burning separating carbon dioxide device and method for coal-fired circultating fluidized bed

Abstract

The invention is a device and method for using coal circular fluid bed to separate carbon dioxide indirectly. The device is made up of circular fluid bed, whirlwind separator, and spraying fluid bed; the method: in the circular fluid bed, the metal particles reacts with the air, generates the metal oxide, after separated by the whirlwind separator, the metal oxide enters the spraying fluid bed; then uses the steam or water to transmit it to the bottom of the fluid bed, carries on water and coal gas reaction, generates carbon dioxide and steam to be discharged, condensates then and eliminates water, the carbon dioxide is separated out; the metal oxide in the spraying fluid bed is reacted with the water coal gas and reduced into metal, returned to the circular fluid bed, carries on metal oxide regeneration process; the coal ash in the spraying fluid bed is light, floats on the surface of the bed, and overflows and is discharged.

Description

technical field [0001] The invention is a combustion method of coal, specifically a device and method for realizing indirect combustion of coal and separating carbon dioxide during the combustion process. Background technique [0002] Carbon dioxide is the most influential greenhouse gas among many potential greenhouse gases. How to reduce carbon dioxide emission has become one of the main contents of human sustainable development in the future. The conventional combustion technology uses air as the oxidant, and the carbon dioxide in the generated flue gas accounts for 10-20%. The subsequent treatment (concentration and purification) of carbon dioxide is too costly, and the following methods are usually used: [0003] ●The separation and purification of carbon dioxide by molecular membrane separation method has low separation efficiency and high cost. If thermal power plants use this method to separate and treat carbon dioxide in flue gas, it will increase the cost of power ...

AI Technical Summary

Problems solved by technology

[0003] ●Separation and purification of carbon dioxide by molecular membrane separation method has low separation efficiency and high cost. If thermal power plants use this method to separate carbon dioxide from flue gas, it will increase the cost of power generation by 20%, and it is difficult to implement even in developed countries

[0004] ●Removing carbon dioxide through biological photosynthesis, and finding high-efficiency biological algae for large-scale carbon dioxide removal still needs technological breakthroughs

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