Coal-fired flue gas CO2 curing adsorption system

Abstract

The invention discloses a coal-fired flue gas CO2 curing adsorption system. The coal-fired flue gas CO2 curing adsorption system comprises a bubbling adsorption bed system, a flue gas recirculation system and a slag feeding and discharging system. The coal-fired flue gas CO2 curing adsorption system is characterized in that on the basis of the process advantages of medium-temperature combustion of a circulating fluidized bed boiler, calcination desulfurization of limestone in the boiler and medium-temperature slag discharging, slag discharging waste heat and CaO contained in the slag discharging waste heat are used for carrying out carbonation reaction to adsorb CO2, so that pollution is controlled by waste, the method is simple in process, low in cost and simple in process, cooperative treatment of the coal-fired solid waste and the flue gas CO2 is achieved, meanwhile, the carbon content of the fly ash of the CFB boiler is reduced, and the advantage that the circulating fluidized bed boiler controls coal-fired pollutants at low cost is further expanded.

Description

technical field [0001] The invention relates to a flue gas CO 2 Solidified adsorption systems, especially a circulating fluidized bed (CFB) boiler flue gas CO 2 Cured adsorption system. Background technique [0002] CO 2 Emissions reduction is a global issue, CO from burning coal 2 The emissions are relatively large, accounting for about 50-60%. 2 There are strict regulations on emission limits, but CO 2 Emission reduction is imperative. Currently, the CO under study 2 Emission reduction methods mainly include direct wet method, direct dry method and indirect wet method. Indirect wet method generally uses kinetic acid and kinetic alkali, which has serious secondary pollutants and high energy consumption. Direct wet method and direct dry method also consume high energy consumption. for CO 2 For large emitters-coal-fired power plants, these methods are used to remove CO 2 The cost is too high in the country for CO 2 These methods cannot be applied where emissions hav...

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Problems solved by technology

Currently, the CO under study 2 Emission reduction methods mainly include direct wet method, direct dry method and indirect wet method. Indirect wet method generally uses kinetic acid and kinetic alkali, which has serious secondary pollutants and high energy consumption. Direc

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