Thermal power generating unit working medium shunting circulation peak shaving system

Abstract

The invention relates to a thermal power generating unit working medium shunting circulation peak shaving system. According to a steam turbine principle, a cylinder 0 is added on the basis of setting a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder on a conventional steam turbine; the system is provided with such pipelines and valve accessories as a high-pressure heater 0, a deaerator 0 and an auxiliary front heater for forming a thermal power generating unit working medium shunting circulation peak shaving flexible technology with a steam turbine unit. The unit working medium shunting realizes thermal circulation of a working medium with efficient small circulation formed by the cylinder 0 and basic large circulation formed by the conventional steam turbine consisting of the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder. The obvious improvement of the thermal power generating unit deep peak shaving performance and higher heat efficiency of total peak shaving circulation are realized by fully using the advantages of the efficient small circulation and the working medium shunting flexibility of the basic large circulation. The system is suitable for a steam condensing unit or a heating unit, is used for energy conservation and peak shaving performance modification of an active-duty steam turbine generator unit, and is prominent in practical significance.

Description

technical field [0001] The invention relates to a thermal power generation system, in particular to a thermal power unit working fluid split cycle peak regulation system. Background technique [0002] The energy production and consumption revolution requires the promotion of energy supply-side revolution and the establishment of a multi-supply system. In order to meet the needs of the rapid development of renewable energy, the power grid must improve the peak-shaving power structure and improve the capacity of renewable energy consumption. Among them, improving the flexibility of thermal power operation is One of the key issues that need to be solved urgently. During the "Thirteenth Five-Year Plan" period, my country's thermal power will face the power market background of "double reduction and double low" of lower electricity prices, lower utilization hours, low power growth rate, and low load rate. Develop the flexibility of thermal power units and accelerate energy techno...

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Problems solved by technology

[0005] The present invention is aimed at the problems that modern thermal power generating units generally need to have deep peak-shaving capability, and the operating efficiency of the peak-shaving unit is low when the load is low, and it is difficult to ensure that the emission reduction reaches the standard. The working medium of the system circulation is divided into a high-efficiency small circulation composed of the 0 cylinder, and a basic large circulation composed of a steam turbine with a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, and jointly realize the thermodynamic cycle of the working medium

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