Extracted steam type steam Rankine combined cycle power generation device

Abstract

The invention relates to an extracted steam type steam Rankine combined cycle power generation device. The extracted steam of a steam turbine in high-pressure-end steam Rankine cycle is used 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 directly compounded; vaporization latent heat, released when the extracted steam of the steam turbine in the high-pressure-end steam Rankine cycle is condensed, is completely used for the low-pressure-end steam Rankine cycle for generating power; the load of a traditional steam Rankine cycle system condenser can be effectively reduced by above 30%; and according to a system optimization technology, the cycle absolute thermal efficiency of the whole system can be improved by above 4%. The extracted steam type steam Rankine combined cycle power generation device disclosed by the invention can be used for the energy saving transformation of a traditional extraction condensing type or pure condensing type unit, also can be used for designing and constructing a newly-built unit and has an obvious economic, social and environmentally-friendly benefit.

Description

technical field [0001] The invention relates to a steam extraction type steam Rankine combined cycle power generation device, specifically belonging to the technical field of thermal power plant power devices. Background technique [0002] A thermal power plant that uses water vapor as a working medium is a large-scale factory that converts thermal energy into mechanical energy, and then converts mechanical energy into electrical energy. The cycle applied in power plants is very complicated, but in essence, it is mainly completed by the Rankine cycle composed of boilers, steam turbines, condensers, water pumps and other equipment. The working principle is: the feed water is first pressurized by the feed water pump and then sent Into the boiler, the water in the boiler is heated and vaporized to form high-temperature and high-pressure superheated steam. The superheated steam expands and does work in the steam turbine and becomes low-temperature and low-pressure exhaust steam....

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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