Steam heating system for preventing external leakage of nuclear power secondary medium

Abstract

The invention discloses a steam heating system for preventing external leakage of a nuclear power secondary medium. The steam heating system comprises a secondary medium loop, a high-pressure circulating water loop and a low-pressure medium loop, wherein heat is transferred between the secondary medium and the high-pressure circulating water and between the high-pressure circulating water and thelow-pressure medium through heat exchangers, when the system is running, the pressure of the high pressure circulating water loop is maintained higher than the pressure of the secondary medium loop, and the pressure of the low pressure medium loop is maintained lower than the pressure of the secondary medium loop. According to the steam heating system, due to the fact that the high-pressure circulating water loop is established between the secondary medium loop and the low-pressure medium loop, the steam heating system enables the pressure of the high-pressure circulating water loop to be higher than the secondary medium loop regardless of the normal operation, start and stop or accident state, thereby the steam heating system can effectively prevent the external leakage of the secondary medium and ensure the security of the low-pressure medium for external heat supply, the steam heating system makes it possible to supply heat to the outside with nuclear energy, and the invention alsoprovides a similar solution for other energy utilization systems that need to prevent external leakage of the medium.

Description

technical field [0001] The invention relates to a steam heating system for preventing leakage of nuclear power secondary medium, which belongs to the field of industrial heating and residential heating using a special method. Background technique [0002] In recent years, with the increase in demand for industrial heat and residential heating, as well as the upgrading and replacement of traditional coal and gas-fired decentralized heating methods, the centralized heating technology using low-pressure steam as a heat source has gradually become an important aspect in the field of energy utilization. [0003] The flexibility transformation of thermal power units is not only to meet the requirements of the power grid for peak regulation, but also a positive response to the market heating demand of conventional coal-fired units. Under the background of the continuous improvement of the power auxiliary market, this flexible transformation not only increases the peak-shaving cap...

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Problems solved by technology

[0006] If the secondary medium is used to directly generate a low-pressure heating medium (steam or hot water), since the pressure of the secondary medium is higher than that of the steam or hot water used for heating, there is a possibility that the secondary medium will leak to the heating medium. risk

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