Extraction steam Rankine-organic Rankine combined circulating power generation device

Abstract

The invention relates to an extraction steam Rankine-organic Rankine combined circulating power generation device; the latent heat of vaporization of the circulating steam extraction of steam Rankine is recovered for the circulating power generation of organic Rankine by cooling the steam extraction of a steam turbine in the steam Rankine with an organic working medium in the circulation of organic Rankine, so as to composite the circulation of steam Rankine with that of the organic Rankine; and meanwhile, the safety difficult problem of the flue gas afterheat recovery of the circulation of organic Rankine is solved, the smoke exhaust temperature is effectively reduced, the low-temperature corrosion of flue gas is prevented, and the afterheat potential of a steam Rankine circulating system is effectively recovered and utilized. The extraction steam Rankine-organic Rankine combined circulating power generation device not only can be used for the energy-saving reform of an existing unit, but also can be used for the design and manufacturing of new units, and has significant economic, social and environmental protection benefits.

Description

technical field [0001] The invention relates to a steam extraction type steam Rankine-organic 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-pressur...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of the above-mentioned steam Rankine cycle, and the shortcomings of the ORC technology cycle technology, and propose a new composite cycle flow process for thermal power plants, that is, steam extraction type steam Rankine-organic Rankine combined cycle power generation device , can carry out energy-saving transformation of the existing steam Rankine cycle, and at the same time solve the key problem of the safe operation of the ORC unit, and recover the latent heat of vaporization of the steam in the steam Rankine cycle for low-temperature end organic Rankine cycle power generation, thereby effectively improving the entire The thermal efficiency of the combined cycle unit can finally achieve the goal of saving energy, reducing consumption and improving the thermal efficiency of the system

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