Gas-steam combined cycle heat and power cogeneration heat transfer oil heating system and heating method

Abstract

The invention relates to the energy power technology and discloses a heat supplying system of heat-conducting oil in combined heat and power generation of gas-steam combined cycle and a heat supplying method. The heat supplying system comprises a gas turbine system, a steam turbine system and a heat-conducting oil heat supplying system, wherein the gas turbine system comprises a gas turbine; the steam turbine system comprises a steam turbine; the heat-conducting oil heat supplying system comprises a waste-heat boiler; the waste-heat boiler is internally provided with a heat-conducting oil heated surface module convenient for the waste-heat boiler to heat heat-conducting oil directly and supply heated high-temperature heat-conducting oil to a heat user; the heat supplying system also comprises a heat-conducting oil evaporator which can take away water for heat exceeding the need of the heat user as a working medium, so that the temperature control for the heat-conducting oil in the waste-heat boiler is realized.

Description

technical field [0001] The invention relates to energy and power technology, in particular to a gas-steam combined cycle heat and power cogeneration heat supply system and a heat supply method. Background technique [0002] At present, when the gas-steam combined cycle composed of gas turbine, waste heat boiler, steam turbine and generator is used for combined heat and power production, the waste heat boiler heats water to generate steam, and uses steam as a working medium to supply heat to heat users. After being sent to the heat user, it condenses into water and releases heat. However, heat transfer oil is generally used as the heating medium in the production process equipment of chemical heat users, and the working temperature of heat transfer oil reaches above 300°C, which is much higher than the saturation temperature of steam at atmospheric pressure of 100°C. Due to the different heating working fluids, the existing gas-steam combined cycle heat and power cogeneratio...

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Problems solved by technology

Due to the different heating working fluids, the existing gas-steam combined cycle heat and power cogeneration technology cannot be effectively applied to the production of chemical heat users using heat transfer oil as the working fluid

If the high-temperature steam generated by the thermal power plant is used to heat the heat transfer oil of the chemical heat user production device according to the existing technology, since the working temperature of the heat transfer oil is much higher than the saturation temperature of the steam under normal pressure, the steam cannot be condensed into water to release a large amount of water. latent heat of vaporization, which leads to poor steam heating effect, low energy utilization efficiency, and poor economy

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