Brayton-steam Rankine-organic Rankine combined cycle power generation device

Abstract

The invention relates to a Brayton -steam Rankine-organic Rankine combined cycle power generation device. Exhaust of a Brayton gas turbine serves as a heat source of steam Rankine-organic Rankine combined cycle, a condenser of the steam Rankine cycle serves as an evaporator of the organic Rankine cycle, the characteristic that the medium / low-temperature heat source has high utilization efficiency in the organic Rankine cycle is utilized, lots of latent heat of vaporization released by devaporation is used for high-efficiency organic Rankine cycle power generation, the vaporized latent heat of the steam of the steam Rankine cycle is only used for power generation, so that more that 50 degrees per tonnage steam can be recovered, the safety problem in the process of recovering flue gas waste heat in the organic Rankine cycle is solved, the smoke exhaust temperature is effectively reduced, and the low-temperature corrosion of the flue gas is avoided. The device can be used for energy conservation transformation of the conventional unit, can be used for design and construction of novel units and is obvious in economic, social and environment-friendly effects.

Description

technical field [0001] The invention relates to a Breton-steam Rankine-organic Rankine combined cycle power generation device, which specifically belongs to the technical field of thermal power plant power devices. Background technique [0002] Gas-steam combined cycle has a series of advantages such as high thermal efficiency, fast start-up speed, good environmental protection conditions, short installation period, low investment cost, etc., coupled with the rapid development of gas turbine technology in recent years, the single unit power of gas turbine is also increasing continuously, combined cycle The research has attracted the attention and implementation of countries all over the world. [0003] The research on combined cycle power generation technology in foreign countries began in the late 1960s. After decades of development, at present, the gas-steam combined cycle power generation technology in many developed countries such as the United States, the United Kingdom...

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Problems solved by technology

[0008] However, ORC technology also has its inherent disadvantages: since the organic working fluid may have the characteristics of flammability and explosion, when using the residual heat of flue gas to organize ORC in the tail flue of a boiler or industrial furnace, it is necessary to consider the dust in the flue gas, etc. The leakage caused by the wear and corrosion of the heat exchanger in the channel must be considered for the resulting explosion protection and the protection of the environment and the working place.

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