Garbage gasified fuel gas and steam turbine combined power generation system adopting multi-stage heat exchange mode

Abstract

The invention discloses a garbage gasification fuel gas and steam turbine combined power generation system adopting a multi-stage heat exchange mode. The garbage gasified fuel gas and steam turbine combined power generation system comprises a garbage gasification system, a boiler system and a power generation system; the power generation system comprises a mixer, an air compressor, a synthesized smoke gas compressor, a synthesized smoke gas combustion chamber, a turbine a, a turbine b, a steam turbine, a power generator a, a power generator b and a waste heat boiler. A heating channel of a synthesized gas steam-gas heat exchanger, a heating channel of an air steam-gas heat exchanger and a heating channel of a steam-water heat exchanger are connected between a gas outlet of the turbine a and a water feeding hole of a water feeding input system. A heated channel of a gas-water heat exchanger is connected between a low-pressure air compressor and a high-pressure air compressor. According to the garbage gasification fuel gas and steam turbine combined power generation system adopting the multi-stage heat exchange mode disclosed by the invention, large-scale garbage continuous gasification treatment is realized, garbage treatment capacity is greater, heat recycling efficiency is high, and emission of pollutants can be effectively 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 multi-stage heat exchange combined power generation system of waste gasification gas and steam turbine. 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 pus...

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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