Liquid state energy storage system applicable to depth peak load regulation of heat power generating unit

Abstract

The invention discloses a liquid state energy storage system applicable to depth peak load regulation of a heat power generating unit. The liquid state energy storage system comprises a low-temperature molten salt storage tank, a high-temperature molten salt storage tank, molten salt heat absorbers, a molten salt radiator, steam pressure reducers and connecting pipelines; the low-temperature molten salt storage tank is connected with the molten salt heat absorbers through a low-temperature molten salt heat absorption pipeline; the molten salt heat absorbers are connected with the high-temperature molten salt storage tank through a high-temperature molten salt heat absorption pipeline; the high-temperature molten salt storage tank is connected with the molten salt radiator through a high-temperature molten salt heat release pipeline; the molten salt radiator is connected with the low-temperature molten salt storage tank through a low-temperature molten salt heat release pipeline; the molten salt thermal absorbers are connected with a boiler and a steam turbine set through a steam by-pass pipeline and a steam heat release circuit pipeline; the steam turbine set and a condenser are connected with a high pressure heater and a low pressure heater of the heat power generating unit; the molten salt radiator is arranged between the boiler and the high pressure heater and is connected with the high pressure heater in series; and one steam pressure reducer is arranged on the steam heat release circuit pipeline.

Description

technical field [0001] The invention relates to the technical field of molten salt energy storage and power generation, and more specifically relates to a liquid energy storage system suitable for deep peak regulation of thermal power units. Background technique [0002] On July 22, 2016, the National Development and Reform Commission and the National Energy Administration issued the "Notice on Printing and Distributing the Trial Measures for Priority Power Generation of Renewable Energy Peaking Units". The "Trial Measures" make it clear that for renewable energy peak-shaving units, localities can arrange a certain scale of coal-fired power units for renewable energy peak-shaving in light of the scale of renewable energy construction, consumption, power structure and load characteristics. In some areas, in order to ensure the consumption of renewable energy in the power system, thermal power units are even required to perform deep peak regulation (20% low load). , First, th...

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Problems solved by technology

In some areas, in order to ensure the consumption of renewable energy in the power system, thermal power units are even required to perform deep peak regulation (20% low load). , one is that the peak shaving effect is not good, and the other is that it affects the safe and stable operation of the boiler

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