System and method for improving trapping economy of CO2 in flue gas of coal-fired boiler

Abstract

The invention discloses a system and a method for improving the trapping economy of CO2 in flue gas of a coal-fired boiler. The system is based on a rotary CO2 adsorption and desorption device, and mainly comprises a dust remover, a flue gas heater, the rotary CO2 adsorption and desorption device, a desulfurization tower, a flue gas conditioning device, a solution absorption method carbon capture device and a chimney. According to the invention, the CO2 concentration of the flue gas entering the solution absorption method carbon capture system is increased by using the rotary carbon dioxide adsorption and desorption device. According to the method, the initial concentration of the CO2 in the flue gas entering the solution absorption process carbon capture device can be increased under the condition of lower energy consumption, so that the energy consumption of a solution absorption method carbon capture system or the volume of the solution absorption method carbon capture system can be greatly reduced, and finally, the carbon dioxide capture cost of a coal-fired boiler is greatly reduced; the carbon capture economy of the system is effectively improved.

Description

technical field [0001] The invention relates to a method for raising CO in flue gas of coal-fired boiler 2 Systems and methods for capture economy. Background technique [0002] Fossil-fueled power plants, especially coal-fired power plants, can only be low enough carbon-intensive to meet global warming reduction targets if combined with carbon capture and storage technologies. CO 2 The increase of the initial concentration and the separation of CO 2 The reduction in required relative minimum power consumption is directly related to the increase in flue gas CO 2 The initial concentration plays an important role in reducing the cost. Coal-fired power plants produce flue gas with high flow rates and low concentrations, two factors that directly affect the deployed CO 2 The size of the capture equipment and system, in turn, directly affects the cost of capture. [0003] The amine solution absorption method is a mature CO 2 Removal process, in the capture of CO in the flu...

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Problems solved by technology

[0004] Aiming at the problem of poor economy of carbon capture by solution absorption method in existing coal-fired power plants, the present invention proposes a method to increase CO in the flue gas of coal-fired boilers 2 Systems and methods for capture economics

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