Gas turbine-steam turbine coaxial combined power generation system based on waste gasification

Abstract

The invention discloses a gas turbine-steam turbine coaxial combined power generation system based on waste gasification. The gas turbine-steam turbine coaxial combined power generation system comprises a waste gasification incineration system, a boiler system and a power generation system, wherein the power generation system comprises a mixer, an air compressor, a synthetic flue gas compressor, a synthetic flue gas combustion chamber, a turbine, a steam turbine, a power generator, a waste heat boiler and a water supply input system; the inlet of the mixer is connected with the saturated steam outlet of a steam manifold and the air outlet of the air compressor; the water outlet of the mixer is connected with the water inlet of the steam manifold; the steam outlet of the mixer is connected with the steam inlet of a super-heater; the gas inlet of the flue gas compressor is connected with the waste gas discharge outlet of the boiler system; the steam outlet of the super-heater and the gas outlet of the flue gas compressor are connected with the synthetic flue gas combustion chamber, the turbine and the waste heat boiler in sequence; the steam outlet of the waste heat boiler is connected with the steam inlet of the steam turbine; the turbine, the steam turbine and the power generator are in power connections. By adopting the gas turbine-steam turbine coaxial combined power generation system, large-scale continuous waste gasification treatment can be performed, high heat recovery efficiency is achieved, and pollutant discharge is reduced.

Description

technical field [0001] The invention belongs to the technical field of solid waste incineration treatment and resource treatment, and in particular relates to a gas and steam turbine coaxial combined power generation system based on waste gasification. Background technique [0002] The existing waste treatment technologies mainly include incineration, sanitary landfill, composting, and waste recycling. Among the conventional waste treatment technologies, incineration has the advantages of obvious reduction effect, complete harmlessness, small land occupation, utilization of waste heat energy, and less secondary pollution, which meets the strategic requirements of my country's sustainable development. However, with the continuous improvement of environmental protection requirements at home and abroad, how to strengthen the control of secondary pollution is particularly important. Therefore, waste pyrolysis and gasification incineration technology is gradually pushed to the r...

AI Technical Summary

Problems solved by technology

At the same time, the fly ash content in the flue gas after incineration is high, the boiler ash is heavy, and the ash cleaning maintenance period is short

[0007] 2. With the increasing amount of garbage generated and piled up like mountains, the amount of garbage treatment must be effectively increased in order to meet market demand

[0010] Existing technologies such as the following patents: external combustion wet air gas turbine power generation system (ZL 01120378.1), gas turbine power generation system and its operation control method (ZL 200880007113.7), dual-fuel combustion-supporting gas-steam combined cycle system (ZL 200610062631.1), pulverized coal Gas turbine power generation system and process method for producing pulverized coal two-phase flow fuel (ZL200610062055.0), multi-column segmental drive compound domestic waste incinerator (ZL200710092508.9) and two-stage waste incinerator (ZL201010268376.2). Problems involved: no combination of waste heat treatment methods, secondary pollution control of waste heat treatment, complex flue gas components, etc.; existing heat treatment thermochemical reactions are dominated by oxidation reactions, supplemented by reduction reactions, which are prone to secondary pollution and the combustion peroxygen coefficient is large, the primary air and secondary air supply are large, and the dust content in the flue gas is relatively high, which has a great impact on the heat energy recovery system and flue gas treatment system. It is easy to accumulate dust and has a large amount of flue gas. , which relatively reduces the heat conversion efficiency; the deep purification of synthetic flue gas after waste gasification and incineration requires the cleanliness of synthetic flue gas to meet the requirements of gas turbines, and the application of waste gasification incineration-gas-steam turbine combined cycle power generation; waste heat treatment method The innovation of reducing the amount of flue gas, changing the composition of flue gas, the chemical reaction environment becomes a reduction reaction, and the relative improvement of thermal efficiency

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