Xi'an Jiaotong University

Jinshi Wang

Ming Liu

Junjie Yan

Daotong Chong

Hui Yan

Weixiong Chen

A solar-aided coal-fired flexible power generation system and an operating method thereof are provided. The system includes a coal-fired thermal power generation system and a high-temperature heat storage system coupled with solar thermal power generation; wherein a heat storage medium heater is arranged in the boiler flue; the flow rates of heat storage medium entering the solar heat collection device and the heat storage medium heater are adjusted by the regulating valve and the pump, eliminating irradiation fluctuation influences and maintaining stable power; a heat storage medium tank is used for peak shaving to reduce steam turbine output under stable boiler combustion; the flow and temperature of the feedwater entering the heat storage medium and feedwater heat exchanger are adjusted to realize rapid load cycling. The present invention can realize solar and coal-fired generation coupling, reduce coal consumption, and greatly improve the flexibility and economy.

Solar-aided coal-fired flexible power generation system and operation method thereof

A flexible coal-fired power generation system includes a thermal system for coal-fired power generating unit and a high-temperature heat storage system connected in parallel, wherein: the heat storage system includes a heat storage medium pump (), a cold heat storage medium tank (), a hot heat storage medium tank (), multiple valves, and a heat storage medium and feedwater heat exchanger (). A heat storage medium heater () locates in the boiler () and is connected with both the cold heat storage medium tank () and the hot heat storage medium tank (). Through the heat storage medium pump (), the flow of heat storage medium that enters the heat storage medium heater () is adjusted to reduce the output of the steam turbine when the boiler () is stably burning.

Flexible coal-fired power generation system and operation method thereof

An all-condition auxiliary denitration system and an operation method thereof are provided. The system includes a heat-storage medium heater, a low-temperature reheater, an economizer, and an SCR denitration device which are successively interconnected, and further including a heat-storage medium tank and a heat-storage medium and feedwater heat exchanger. A flow of a cold heat-storage medium entering the heat-storage medium heater is regulated, so that heat absorption of the heat-storage medium is matched with a boiler load. Flows of hot heat-storage medium and feedwater, which enter the heat-storage medium and feedwater heat exchanger, are regulated through a feedwater regulating valve and a hot heat-storage medium outlet regulating valve. A total feedwater flow is regulated with assistance of a bypass feedwater regulating valve, so that a temperature of flue gas entering the SCR denitration device is kept in an optimal operation range under different boiler loads, and denitration efficiency is ensured.

Growing community of inventors

Shaanxi, China

Jinshi Wang