Molten salt heat storage and steam supply system for supplying black-start power supply and working method

Abstract

The invention relates to a molten salt heat storage and steam supply system for a supplying black-start power supply and a working method. According to the molten salt heat storage and steam supply system for the supplying black-start power supply and the working method, hot re-extraction steam of a boiler is used for heating molten salt for heat storage, the power generation load of a unit can be effectively reduced, and peak regulation operation of the unit is achieved. Compared with a traditional electric heating heat storage system, the system of the invention avoids multi-stage conversion from steam heat energy to electric energy to molten salt heat energy, and improves the operation efficiency. The molten salt heat storage system transmits stored heat energy to steam through a steam generator and is used for supplying steam to the outside in an industrial mode or used as a power source to drive a steam turbine generator unit to operate; power generated by the steam turbine generator unit can be merged into a plant power utilization end through a plant transformer to drive an auxiliary machine to operate in a starting process, s that black-start power supply of the power plant is achieved, and the black-start problem of the power plant in isolated grid operation can be effectively solved.

Description

technical field [0001] The invention belongs to the field of molten salt heat storage and steam supply, and in particular relates to a molten salt heat storage and steam supply system and a working method for supplying a black start power supply. Background technique [0002] Black start means that after the entire system is powered off due to a fault, without the help of the external power supply of the system, the units with self-starting ability in the system are started first, and then the units without self-starting ability are driven to gradually expand the power supply range of the system, and finally realize the power supply of the entire system. The process of restoring power. [0003] The design black start capability of coal-fired power plants is not only a necessary measure for safe production and self-rescue of power plants in the event of power failure, but also a requirement for reliable and stable operation of the power grid. Due to the current highly interc...

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Problems solved by technology

[0005] In order to achieve the above purpose, the present invention provides a molten salt heat storage and steam supply system and working method for supplying a black start power supply. The coal-fired generating set is organically combined with the molten salt heat storage system, and the molten salt heat storage system is equipped with steam Turbine generator set, used for black start power supply of power plants, solves the black start problem of power plants

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