Novel fire coal supercritical carbon dioxide Bretton cycle power generation system

Abstract

The invention discloses a novel fire coal supercritical carbon dioxide Bretton cycle power generation system. The novel fire coal supercritical carbon dioxide Bretton cycle power generation system comprises a boiler and a supercritical carbon dioxide Bretton cycle power generation system body, wherein the boiler comprises a hearth, a horizontal flue and a tail flue which communicate with one another in sequence; a water cooled wall, a wall type reheater and a platen superheater are sequentially arranged inside the hearth in the flowing direction of smoke; a high-temperature reheater is arranged in the horizontal flue; a low-temperature reheater and a smoke cooler are sequentially arranged inside the tail flue in the flowing direction of the smoke; a low-temperature superheater is arranged inside the tail flue; and the low-temperature reheater and the low-temperature superheater are arranged side by side. The novel fire coal supercritical carbon dioxide Bretton cycle power generation system can effectively decrease the temperature of exhaust smoke of the boiler and is high in power generation efficiency and thermal efficiency of the boiler.

Description

technical field [0001] The invention belongs to the field of advanced high-efficiency thermal power generation, and relates to a novel coal-fired supercritical carbon dioxide Brayton cycle power generation system. Background technique [0002] Continuously improving the efficiency of generator sets is the eternal theme and goal of power industry research. For power generation companies, the higher the cycle efficiency of the system, the lower the energy consumption per unit of power generation, and the lower the corresponding energy consumption and pollutant emissions. For the traditional generator set with the steam Rankine cycle as the energy conversion system, if the power generation efficiency is increased to about 50%, the main steam parameters need to be increased to 700°C, which means that it takes a high economic cost and time cost to Research and development of new nickel-based superalloys. In order to avoid technical bottlenecks in materials, scholars from variou...

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Problems solved by technology

For supercritical carbon dioxide boilers, if a conventional economizer is arranged at the tail of the boiler according to the heating surface layout method of the traditional steam boiler, the temperature rise of the working medium is usually only a few degrees Celsius due to the low heat transfer temperature and pressure at the economizer. Unreasonable layout of heating surface and poor economy

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