Molten salt heating and discharging system for solar thermal power

Abstract

The invention relates to a molten salt heating and discharging system for solar thermal power. The system comprises molten salt storage equipment, a heat exchange system and molten salt heating and discharging equipment, wherein the molten salt storage equipment, the heat exchange system and the molten salt heating and discharging equipment form a sealed system through pipelines. The molten salt heating and discharging equipment comprises a molten salt bath and a molten salt furnace, the molten salt bath and the molten salt furnace are communicated through a pipeline; the molten salt storage equipment consists of one or two or more than two molten salt storage tanks; a plurality of molten salt storage tanks are connected with one another through pipelines, and the pipelines are provided with a heat exchanger system. According to the molten salt heating and discharging system for the solar thermal power, molten salt can be molten before a solar-thermal power station is put into production and can be heated during running of the solar-thermal power station; and simultaneously, in emergency situation and long-term rainy or snowy weather, the molten salt in a heat exchanger can be discharged, and problems that molten salt in the heat exchanger is laid aside for a long time, crystallized and solidified are solved.

Description

technical field [0001] The invention relates to the field of photothermal power generation energy storage, in particular to a molten salt heating and discharge system in a photothermal power generation energy storage system. Background technique [0002] The parabolic trough system is currently the most mature and widely used solar thermal power generation technology. The system is mainly composed of a solar collector field, a steam turbine power generation device and an energy storage system. During the daytime, the light-concentrating and reflecting grooves in the heat-collecting field reflect sunlight and focus it on the heat-collecting tubes, heating the synthetic heat-transfer oil flowing in the tubes to about 400°C, and a part of the high-temperature heat-transfer oil is sent to the steam generator to generate steam to drive the traditional The steam turbine generates electricity, and another part of the high-temperature heat transfer oil is delivered to the heat exch...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a molten salt heating and discharge system for the solar-thermal power generation energy storage system, which can not only solve the problems of molten salt melting when put into production, heating during operation, etc. During rainy and snowy weather, the discharge of molten salt in the heat exchanger can avoid problems such as long-term shelving, crystallization, and solidification of molten salt in the heat exchanger

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