Gas turbine electricity/steam cogeneration system employing smoke exhaust waste heat to increase yield of seam

Abstract

The invention relates to a gas turbine electricity/steam cogeneration system which employs smoke exhaust waste heat to increase the yield of steam. The gas turbine electricity/steam cogeneration system consists of a gas turbine generating set, a waste heat steam boiler, a high-temperature water boiler, a secondary hot water boiler, a steam header, a secondary steam boiler, a low-pressure steam header, a first liquid collection box, a second liquid collection box, a liquid gathering box and the like. A smoke outlet of a gas turbine is connected with the waste heat steam boiler; a smoke port of the waste heat steam boiler is connected with the high-temperature water boiler; the high-temperature water boiler is connected with the secondary hot water boiler, and is in space connection with water of the secondary steam boiler through a hot water pipe; the secondary steam boiler is connected with the steam header through a steam additional heating pipe; a steam pipe of the waste heat steam boiler is connected with the steam header; steam pipes of heat using equipment are connected with the steam header; and condenser pipes of the heat using equipment are connected with the first liquid collection box and the second liquid collection box respectively; the waste heat steam boiler is equipped with a third liquid collection box, and condenser water is sent into the liquid gathering box through a high-temperature pump; and a condenser water main pipe at the bottom of the liquid gathering box conveys the condenser water to the waste heat steam boiler and the high-temperature water boiler.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering systems, and relates to a gas turbine-electric / steam cogeneration system for increasing steam production by using exhaust waste heat. Background technique [0002] At present, gas turbine electric / steam cogeneration systems that use natural gas as fuel exhaust a large amount of smoke. Recovering the latent and sensible heat in the exhaust smoke is an important energy-saving measure, but the existing technology only uses this part of the heat to generate heat. Water, but the consumption of a large amount of hot water is a problem. If it is not solved properly, it will not only save energy, but also waste water resources, and the project cost will remain high. In addition, in the prior art, the thermal energy utilization rate of the downstream steam heating system is also low, and there is a loss of mass and heat of the working fluid in the heat exchange, resulting in waste of ene...

AI Technical Summary

Problems solved by technology

[0002] At present, gas turbine electric / steam cogeneration systems that use natural gas as fuel exhaust a large amount of smoke. Recovering the latent and sensible heat in the exhaust smoke is an important energy-saving measure, but the existing technology only uses this part of the heat to generate heat. Water, but the consumption of a large amount of hot water is a problem. If it is not solved properly, it will not only save energy, but also waste water resources, and the cost of the project will remain high.

In addition, in the prior art, the thermal energy utilization rate of the downstream steam heating system is also low, and there is a loss of mass and heat in the heat exchange of the working fluid, resulting in waste of energy and waste of water resources

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