Switching control device and method for operation mode of oxygen-enriched combustion system

The invention relates to the field of automatic control and discloses a switching control device and a switching control method for an operation mode of an oxygen-enriched combustion system. The control device comprises a measuring module and a processing module, wherein the measuring module is used for respectively measuring a flue gas flow rate, an oxygen flow rate, an air flow rate, oxygen concentration in mixed flue gas of primary air and secondary air and boiler furnace outlet oxygen concentration supplied into a primary air and secondary air re-circulating flue; and the processing module is used for acquiring reference oxygen concentration in the primary air and the secondary air mixed flue gas according to the flue gas flow rate, the oxygen flow rate and the air flow rate supplied into the primary air and secondary air re-circulating flue, and respectively regulating opening degrees of an oxygen injection regulating valve of the primary air and secondary air re-circulating flue, a flue gas injection regulating damper of the primary air and secondary air re-circulating flue and an air injection regulating air door of the primary air and secondary air re-circulating flue according to the reference oxygen concentration in the primary air and the secondary air mixed flue gas, the boiler furnace outlet oxygen concentration and the oxygen concentration in the primary air and secondary air mixed flue gas. By virtue of the switching control device, the operation mode is stable, smooth and quick in switching.