Bretton-Extraction Steam Rankine Combined Cycle Power Plant

Abstract

The invention relates to a britten-steam extraction type rankine combined cycle power generation device which is characterized in that extraction steam of a steam turbine in a high-pressure end steam rankine cycle serves as a heat source of a steam generator in a low-pressure end steam rankine cycle; the high-pressure end steam rankine cycle and the low-pressure end steam rankine cycle are combined directly; latent vaporization heat released during extraction steam condensation of the steam turbine in a high-temperature end steam rankine cycle is wholly used for power generation in a low-temperature end steam rankine cycle; a load of a condenser of the traditional steam rankine cycle system is effectively reduced by above 10%; and a system optimization technology is adopted, so that the cycle absolute heat efficiency of the overall system can reach above 4%. The device can be applied to energy conservation transformation of the existing extraction condensing or straight condensing unit, can also be applied to design and construction of a newly-built unit, and has very significant economic, social and environmental benefits.

Description

technical field [0001] The invention relates to a Breton-extraction steam 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, and...

AI Technical Summary

Problems solved by technology

Although this part of waste heat resources is a huge waste, it is difficult to recycle it. The main reasons are: (1) The quality of waste heat is low, and no effective utilization method has been found; (2) Recovery of this part of waste heat is often harmful to boilers. It is risky to make major changes to the original thermal system; (3) The heat balance problem is difficult to organize, and it is difficult to use it directly in the factory. It is often necessary to look for suitable heat users outside, and the heat load of heat users is often Will fluctuate, limiting the generalizability of the recovery method

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