Overall efficiency optimization control method of IGCC (integrated coal gasification combined cycle) power station with hot end component as core

Abstract

The invention relates to the technical field of overall control of an IGCC (integrated coal gasification combined cycle) power station, and particularly discloses an overall efficiency optimization control method of an IGCC power station with a hot end component as a core. The overall efficiency optimization control method of the IGCC power station with the hot end component as the core includes: starting a power island, enabling a combustion gas turbine to drive a waste heat boiler to generate steam through starting fuel, and tracing heat of an overall gasification island and an overall purification island through the steam; starting the gasification island, monitoring and analyzing heat value and constituents of synthesis gas prepared by the gasification island through online constituents and an online heat value monitoring system in real time, and switching fuel used by the combustion gas turbine from the starting fuel into high heat value synthesis gas fuel when reaching high heat value synthesis gas use conditions of the combustion gas turbine under low loading conditions; adjusting the fuel of the combustion gas turbine and work status of the gasification island. The overall efficiency optimization control method of the IGCC power station with the hot end component as the core effectively improves overall efficiency of the power station, prolongs use life of the combustion gas turbine, reduces running cost of the power station, shortens starting time of the power station, reduces pollutant emission, and really achieves IGCC control.

Description

technical field [0001] The invention relates to the technical field of overall control of IGCC power plants, in particular to a method for optimizing the overall efficiency of IGCC power plants with hot-end components as the core. Background technique [0002] The difficulty of integrated gasification combined cycle (IGCC) power plant lies in the complexity and system optimization of its system. [0003] Such as figure 1 As shown, the current IGCC power station is mainly composed of two parts, namely the coal gasification and purification part and the gas-steam combined cycle power generation part (power island). Among them, the coal gasification and purification part is composed of a gasification island and a purification island. The gasification island includes a coal preparation system, a gasification furnace, an air separation system, and a synthesis gas heat recovery device; the purification island installed downstream of the gasification island includes desulfurizatio...

AI Technical Summary

Problems solved by technology

The two are less related, and at the same time, the interface of the gas turbine control system is closed, which cannot give full play to the optimal performance of the IGCC system

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