Fused salt linear Fresnel heat collecting field anti-condensing system and method thereof

Abstract

The invention discloses a fused salt linear Fresnel heat collecting field anti-condensing system. The fused salt linear Fresnel heat collecting field anti-condensing system comprises a fused salt expanding tank which is arranged at a high position, a linear Fresnel heat collecting field, a low-temperature fused salt tank, a high-temperature fused salt tank and a fused salt heating unit, wherein afused salt outlet of the fused salt expanding tank communicates with a fused salt inlet of the fused salt heating unit through an outlet pipeline of the expanding tank; and a fused salt outlet of thefused salt heating unit communicates with a fused salt inlet of the linear Fresnel heat collecting field through an outlet pipeline of a heater. The fused salt linear Fresnel heat collecting field anti-condensing system has the advantages that the source of the heat collecting field anti-condensing device is flexibly selected according to break-down length of the heat collecting field, start-up preheating time of a light-focusing heat collecting sub system, an energy storage sub system and a steam generating sub system is shortened, and system start-up flexibility is improved; and meanwhile, manufacturing difficulty of electrifying heat-tracing related equipment is further avoided, and safety reliability of the system is ensured.

Description

[0001] Technical field: [0002] The invention relates to an anti-condensation system and a method thereof, in particular to an anti-condensation system of a molten salt linear Fresnel heat collecting field and a method thereof. [0003] Background technique: [0004] The molten salt linear Fresnel solar thermal power generation device is a vacuum heat collecting tube that uses many flat strip reflectors and secondary reflectors to form a concentrating and heat-collecting unit, and reflects and focuses sunlight to the top of the concentrating and heat-collecting unit. It is a clean energy power generation device that heats the heat absorption and heat transfer medium - molten salt in the vacuum heat collector, and the molten salt releases heat through the steam generation system, heats the feed water into superheated steam, and then drives the steam turbine generator set to generate electricity. [0005] Compared with the trough solar power, tower solar power and dish solar pow...

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Problems solved by technology

The above two methods have the following problems: the first one: before the normal start-up of the heat collecting field, all the vacuum heat collecting tubes need to be preheated, which prolongs the start-up time and reduces the flexibility of system start-up; the volume of the low-temperature molten salt tank needs to be increased to accommodate The molten salt in the heating field increases the difficulty of manufacturing and welding the storage tank; the loops of the heating field are long, and the molten salt is emptied by gravity and self-flow, which has high requirements for the slope of the layout, which increases the engineering volume of the heating field and the Cost; the second type: the vacuum heat collecting tube is energized and heat-tracing needs to increase the control and electrical devices for the vacuum heat collecting tube to energize and heat-tracing, which increases the construction cost of the power station; Overhaul and maintenance cost of vacuum heat collecting tube

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