Biomass carbon capture and coal-fired boiler coupling power generation system and method

The invention discloses a biomass carbon capture and coal-fired boiler coupling power generation system and method, and the system comprises a biomass feeding and kiln pyrolysis incineration unit which is used for enabling biomass fuel to be pyrolyzed and incinerated to generate flue gas; the feed water heat recovery unit is used for recovering heat in flue gas generated by pyrolysis and incineration of the biomass fuel; the flue gas waste heat recovery unit is used for pre-treating the flue gas from the water supply heat recovery unit; a water electrolysis hydrogen production and hydrogen storage unit; the carbon adsorption-catalytic conversion unit is used for reacting the pretreated flue gas from the flue gas waste heat recovery unit with hydrogen from the water electrolysis hydrogen production and hydrogen storage unit to prepare methane; provided is a coal-fired boiler power generation unit. According to the invention, heat energy generated by pyrolysis incineration of the biomass fuel can be recovered,