Catalytic combustion system and catalytic combustion method

The invention provides a catalytic combustion system and a catalytic combustion method. The catalytic combustion system comprises an exhaust gas inlet, a chimney, a catalytic combustion device and an adsorption device, wherein the exhaust gas inlet is connected to a filter through a pipeline and then is connected to an upper gas inlet of an adsorption bed through a pipeline, and an adsorption draught fan is connected to a lower gas outlet of the adsorption bed through a pipeline; an upper gas outlet of the adsorption bed is connected to a heat exchanger of the catalytic combustion device through a pipeline; the heat exchanger is connected to a gas outlet of a catalytic combustion draught fan through a pipeline; a gas inlet of the catalytic combustion draught fan is connected to the exhaust gas inlet through a pipeline; and the heat exchanger is connected to the chimney through a pipeline. The catalytic combustion method provided by the invention has the beneficial effects that filtration, active carbon adsorption, hot gas flow desorption and catalytic combustion are combined together to form an effective exhaust gas treatment process, the exhaust gas treatment efficiency is greatly improved, external energy sources required for treating exhaust gases are effectively saved, and secondary emission pollution is completely eradicated.