IGCC system with adjustable thermoelectric ratio and operation method thereof

Abstract

The invention discloses an IGCC system with an adjustable thermoelectric ratio and an operation method thereof. The system comprises a gas turbine power generation system, a waste heat boiler power generation system and a heat supply system, wherein an flue gas outlet of the gas turbine power generation system is provided with a flue gas adjusting device; and the flue gas adjusting device is provided with a flue gas inlet, a first flue gas outlet and a second flue gas outlet, wherein the first flue gas outlet communicates with the waste heat boiler power generation system, a first flue gas adjusting baffle is arranged in a flue between the first flue gas outlet and the waste heat boiler power generation system, the second flue gas outlet communicates with a heating system, a second flue gas adjusting baffle is arranged in a flue between the second flue gas outlet and the heating system, and flue gas outlets of the heating system and the waste heat boiler power generation system are both connected with a chimney. According to the IGCC system with the adjustable thermoelectric ratio and the operation method thereof, flue gas waste heat of the IGCC system can be distributed and utilized, and the thermoelectric ratio can be adjusted by utilizing the flue gas adjusting device, so that partial heat electrolysis coupling of the IGCC system is realized, and the flexibility of the IGCCsystem and the friendliness to a power grid are further improved.

Description

technical field [0001] The invention belongs to the field of coal clean and green power generation, and in particular relates to an IGCC system with adjustable thermoelectric ratio and an operation method thereof. Background technique [0002] IGCC is an integrated coal gasification combined cycle power generation system, including coal gasification and purification part and gas-steam combined cycle power generation part. The main equipment of the first part is gasifier, air separation unit, gas purification equipment (including sulfur recovery device ); the main equipment of the second part includes gas turbine power generation system, waste heat boiler, and steam turbine power generation system; the process of IGCC is as follows: coal is gasified into gas with medium and low calorific value, and after purification, sulfide, nitride, Pollutants such as dust are turned into clean gas fuel, and then sent to the combustion chamber of the gas turbine for combustion, heating the...

AI Technical Summary

Problems solved by technology

60% of the electricity of the IGCC power station is generated by the gas turbine generator. The gas turbine has no condensed water and cannot generate heat for heating

At the same time, the load regulation ability of the gas turbine is poor, and the power generation regulation is poor. The traditional IGCC power station is not conducive to being a flexible power source, which limits the application of IGCC technology.

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