Middle and long distance heat supply transmission system used for fused salt

Abstract

The invention provides a middle and long distance heat supply transmission system used for fused salt. The middle and long distance heat supply transmission system comprises a heat supply station subsystem, a fused salt multi-stage conveying subsystem and a terminal energy consumption subsystem. The heat supply station subsystem comprises a heat supply station cold salt tank, a heat supply station fused salt heating device and a heat supply station hot salt tank. The fused salt multi-stage conveying subsystem comprises a graded conveying tank, a graded conveying pipe salt guide valve, a fused salt conveying pipeline and a returned salt conveying tank. The terminal energy consumption subsystem comprises a terminal heat storage tank and a terminal energy consumption device. The size of the graded conveying tank and the size of the returned salt conveying tank are smaller than those of the heat supply station cold / hot salt tanks, and the graded conveying tank can achieve high-temperature fused salt conveying and low-temperature fused salt recovery under the same system. According to the system, the functions of conveying hot salt and returning cold salt by using one set of fused salt conveying pipeline are realized, meanwhile, segment conveying of the fused salt is realized, the fused salt in a shutdown state can be recovered step by step, the operation cost is reduced, and the operation error-tolerant rate is improved.

Description

technical field [0001] The invention belongs to the field of energy storage and heating Background technique [0002] In recent years, the global installed capacity of solar thermal power generation has reached about 7 million kilowatts. China, the United Arab Emirates, and South Africa have also actively developed solar thermal power generation and expanded installed capacity, pushing solar thermal power generation to a development climax. With the maturity of solar thermal power generation technology, the molten salt energy storage technology supporting solar thermal power generation is also becoming more and more perfect. [0003] A cost-effective energy storage solution can be said to be the key to the gradual transition of human beings to a low-carbon society. At present, there are two main ways of energy storage, one is heat storage and the other is electricity storage. Among the two energy storage methods, molten salt energy storage and lithium battery energy storage...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems existing in the above-mentioned prior art and situation, the present invention proposes a medium and long-distance heat supply transmission system for molten salt, which can better solve problems encountered in molten salt transportation such as difficulty in recycling, operation and maintenance during outage high cost

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