Coal chemical looping combustion mercury removal device and method

Abstract

The invention provides a coal chemical-looping combustion mercury removal device. The coal chemical-looping combustion mercury removal device comprises a fuel reactor; a fuel reactor U-phase valve which is connected with the fuel reactor; an air reactor which is connected with the fuel reactor U-phase valve; an air cyclone separator which is connected with the air reactor; a flue gas cyclone separator which is connected with the fuel reactor; an air reactor U-phase valve which is simultaneously connected with the air cyclone separator, the flue gas cyclone separator and the fuel reactor; a condenser is connected with the flue gas cyclone separator; a SCR denitration device which is connected with the condenser; a flue gas dust remover which is connected with the SCR denitration device; a wet flue gas desulfurizer which is connected with the flue gas dust remover; and a CO2 catcher which is connected with the wet flue gas desulfurizer. The invention further provides a coal chemical-looping combustion mercury removal method based on the coal chemical-looping combustion mercury removal device. The mercury removal method is used for mercury removal of flue gas generated by combustion.

Description

technical field [0001] The invention belongs to the technical field of chemical looping combustion, and in particular relates to a coal chemical looping combustion mercury removal device and method. Background technique [0002] CO produced by industrial production and residential life 2 It is the main cause of global warming effect. for CO 2 In terms of emissions, chemical looping combustion is a method for CO 2 A new combustion technology for capture and storage. Compared with the traditional fuel combustion technology, the chemical looping combustion system consists of an air reactor and a fuel reactor. During the entire combustion process, there is no direct contact between the fuel and the air, and the oxygen required for fuel combustion is provided by the oxygen carrier. The specific process is as follows: the fuel entering the fuel reactor is burned under the action of the oxygen carrier, and the flue gas and fly ash produced by the combustion are separated after ...

AI Technical Summary

Problems solved by technology

Since the metal oxygen carrier in the fuel reactor is continuously reduced during the process of providing the required oxygen for coal combustion, its oxidizing ability is continuously weakened, so it is difficult to continue to oxidize the elemental mercury in the flue gas in the high temperature environment of the fuel reactor , and if more metal oxide oxygen carriers are fed into the fuel reactor in order to improve the mercury removal efficiency, it will bring problems such as increased costs due to the increase in the amount of metal oxygen carriers

Images