Coal-fired power generation system and air heat with recirculation path and related method
AssigneeOrlando Utilities Commission
InventorJason Wailgum
Life of this patent
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Abstract
A coal-fired power generation system may include a boiler outputting flue gas, a coal pulverizer associated with the boiler, and a heat exchanger. The heat exchanger may be configured to exchange heat from the flue gas to a primary air path and a secondary air path. The primary air path is coupled to the coal pulverizer, and the secondary air path is coupled to the boiler. The coal-fired power generation system may include a controllable air recirculation path coupled from an output of the primary air path to an input of the secondary air path.
Claims21
A coal-fired power generation system comprising:
- a boiler outputting flue gas;
- a coal pulverizer associated with the boiler;
- a heat exchanger configured to exchange heat from the flue gas to a primary air path and a secondary air path, the primary air path coupled to the coal pulverizer and the secondary air path coupled to the boiler;
- and
- a controllable air recirculation path coupled from an output of the primary air path from the heat exchanger to an input of the secondary air path to the heat exchanger.
An air heater for a coal-fired power generation system comprising a boiler outputting flue gas, and a coal pulverizer associated with the boiler, the air heater comprising:
- a heat exchanger configured to exchange heat from the flue gas to a primary air path and a secondary air path, the primary air path coupled to the coal pulverizer and the secondary air path coupled to the boiler;
- and
- a controllable air recirculation path coupled from an output of the primary air path from the heat exchanger to an input of the secondary air path to the heat exchanger.
A method for operating a coal-fired power generation system comprising a boiler outputting flue gas, and a coal pulverizer associated with the boiler, the method comprising:
- exchanging heat from the flue gas to a primary air path and a secondary air path using a heat exchanger, the primary air path coupled to the coal pulverizer and the secondary air path coupled to the boiler;
- and
- controlling an air recirculation path coupled from an output of the primary air path from the heat exchanger to an input of the secondary air path to the heat exchanger.
Dependencies are inferred from the claim text.