IGCC thermoelectric system and method capable of achieving flue gas waste heat deep utilization and input gas cooling

Abstract

The invention discloses an IGCC thermoelectric system and method capable of achieving flue gas waste heat deep utilization and input gas cooling. The IGCC thermoelectric system capable of achieving flue gas waste heat deep utilization and input gas cooling comprises a coal gasification and purification part and a gas-steam combined cycle power generation part. The gas-vapor combined cycle power generation part comprises a waste heat boiler, a steam turbine, a condensation heat exchanger and a gas type absorption heat pump. A saturated steam inlet and a flue gas outlet are arranged on the waste heat boiler. A high-pressure steam outlet of the waste heat boiler is connected with the steam turbine. The steam turbine is connected with a second generator to be used for power generator. Flue gas of the waste heat boiler is discharged into the condensation heat exchanger. An outlet of the condensation heat exchanger is connected with an inlet of the gas type absorption heat pump. A medium water outlet of the gas type absorption heat pump is connected with a medium water outlet of the condensation heat exchanger. According to the IGCC thermoelectric system and method, the energy utilization efficiency can be effectively improved, the heat supply capacity and the power generation capacity of a unit can be improved, and obvious economic benefits and environment protection benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of energy saving and emission reduction, and in particular relates to an IGCC thermoelectric system and method for realizing deep utilization of waste heat of flue gas and air intake cooling. Background technique [0002] Existing coal-based power generation technologies have efficiency improvements and CO 2 To reduce emissions, it is urgent to develop efficient, clean, CO 2 Near-zero emission coal power technology. IGCC (Integrated Gasification Combined Cycle) power generation technology combines clean coal gasification technology with efficient combined cycle power generation technology, which is easy to realize CO 2 Capture is one of the important technical routes of green coal power. [0003] In addition, the performance of the IGCC gas turbine is closely related to the ambient temperature during the high temperature period in summer. When the ambient temperature rises, the air density decreases, and...

AI Technical Summary

Problems solved by technology

[0005] IGCC flue gas contains a large amount of water vapor, and the latent heat of vaporization of water vapor in the flue gas accounts for a large proportion of the calorific value of coal. At present, the latent heat of flue gas is basically not utilized and is directly discharged into the environment.

In addition, the water vapor in the flue gas is directly discharged into the atmosphere, which not only causes water loss, but also forms a white plume phenomenon, causing landscape pollution

Images