Closed heating system for cogeneration of gas turbine generator set

Abstract

The invention discloses a closed heating system for cogeneration of a gas turbine generator set. The closed steam heating system comprises the gas turbine generator set, a waste heat boiler, a waste heat water heater, a hot water storage tank, heat equipment, a secondary steam generator and a matched connecting pipe, wherein the waste heat boiler is connected with the waste heat water heater; and the waste heat water heater forms a forced circulation loop through a circulation pipe, a circulation pump and the hot water storage tank. The closed heating system avoids mass and heat losses of a working medium in a heat exchange process, the heat efficiency is high, the working medium is free from secondary pollution, and thus the blow-off rate of the boiler is reduced greatly; in a running process, the water make-up rate of the closed heating system can be controlled below 1%, and the waste heat water heater can recover most latent heat and sensible heat in tail gas, so that the comprehensive heat efficiency is improved greatly so as to have a significant effect on lowering construction costs and heat supply cost. The closed heating system can be used for combined cooling, heating and generation of airports, hotels and schools, and applied to the industry fields of food, beer, light textile, chemical engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering systems, and relates to a closed heat supply system for combined heat and power generation of a gas turbine generating set. Background technique [0002] Gas turbine generator sets generally refer to power generator sets that use gas and liquid fuels, with gas turbines as the mainstream, including internal combustion engines. At present, the combined heat and power generation of distributed gas turbine generator sets that mainly use natural gas as fuel is a relatively mature technology, and the market is gradually expanding. However, the steam heating system still has the loss of mass and heat of the working fluid during the heat exchange process. Larger, lower thermal efficiency of the heating system, insufficient utilization of sensible heat and latent heat in waste heat boiler exhaust, high project cost and high heating cost, how to further improve the cogeneration of gas tur...

AI Technical Summary

Problems solved by technology

At present, the combined heat and power generation of distributed gas turbine generator sets that mainly use natural gas as fuel is a relatively mature technology, and the market is gradually expanding. However, the steam heating system still has the loss of mass and heat of the working fluid during the heat exchange process. Larger, lower thermal efficiency of the heating system, insufficient utilization of sensible heat and latent heat in waste heat boiler exhaust, high project cost and high heating cost, how to further improve the cogeneration of gas turbine generator set There is also a lack of more analysis and research on the heat utilization rate of the heating system

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