A heat utilization system and method for gas turbine cleaning and blowing compressed air

Abstract

The invention discloses a heat utilization system and method for gas turbine purge compressed air, which comprises a condenser, a gas turbine purge cooler, a lithium bromide absorption refrigeration unit and an expansion water tank; Connected to the condensate jellyfish pipe and the condensate bypass pipe; the condensate bypass pipe is connected to the condensate bypass electric valve, the gas turbine purge cooler and the lithium bromide absorption refrigeration unit, and the lithium bromide absorption refrigeration unit is connected to the expansion tank. The water tank is connected with the water supply inlet of the condenser. The invention uses condensed water as a medium to cool the air purged by the gas turbine, recovers the heat of the purged air to heat the condensed water, and the heated condensed water enters the lithium bromide absorption refrigerating unit, and the refrigerating unit uses the condensed water to output a certain amount of heat Cooling capacity, thus forming an energy utilization system coupled with cold and heat sources, avoiding energy waste, and increasing the energy utilization rate of the combined cycle cooling, heating and power triple power supply unit.

Description

technical field [0001] The invention relates to a heat utilization system and method for gas turbine cleaning compressed air. The condensed water becomes high-temperature hot water after passing through the gas turbine cleaning cooler, and at the same time cools the cleaning air, and provides a lithium bromide absorption type for a triple supply gas turbine power plant. Refrigeration units are used. Background technique [0002] In recent years, due to the advantages of short construction period, less environmental pollution and high energy utilization rate, the installed capacity of gas-steam combined cycle units has grown rapidly, and the unit capacity has also continued to increase. The proportion in the power generation industry has increased year by year. [0003] During the operation of the gas turbine, in order to prevent explosion and cool the deactivated nozzles, the combustible gas in the decommissioned gas pipeline must be purged and the deactivated nozzles must b...

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Problems solved by technology

[0003] During the operation of the gas turbine, in order to prevent explosion and cool the deactivated nozzles, the combustible gas in the decommissioned gas pipeline must be purged and the deactivated nozzles must be cooled at the same time, so a part of high-temperature compressed air is extracted from the outlet of the compressor and used to purge the gas after cooling Pipelines and manifolds, the compressor exhaust temperature entering the cooler can reach over 400°C, which is a heat source with high-quality heat. However, in the actual operation process, this part of the heat is not effectively used, but is used to heat the cycle Cooling water consumes both water and electricity, and wastes this part of high-quality heat source

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