A molten salt storage tank heat exchange system

Abstract

The invention discloses a molten salt storage tank heat exchange system, which includes a molten salt storage tank, a heater, a circulation fan, an air channel, an air outlet pipe, air holes and a self-opening and closing device, and the circulation fan is arranged outside the storage tank , the inlet of the circulating fan is connected to the inside of the storage tank, the outlet of the circulating fan is connected to the heater, one end of the heater is connected to the circulating fan, the other end is connected to the air passage, the air passage is connected to the air outlet pipe, and the air hole is arranged on the air outlet pipe , the self-opening and closing device is arranged on the outside of the outlet pipe, which can automatically open or close the air hole. In the molten salt storage tank heat exchange system of the present invention, the self-opening and closing device can effectively solve the problem that when part of the air holes are not submerged by the molten salt in the storage tank, a large amount of hot gas used for circulating heating overflows through the unsubmerged air holes. Directly return to the circulation fan for the next round of circulation, without participating in the "short circuit" phenomenon of heating the molten salt in the storage tank, causing the problem of energy loss.

Description

technical field [0001] The invention belongs to the field of molten salt heat storage, and in particular relates to a molten salt storage tank heat exchange system. Background technique [0002] As a clean energy storage medium, molten salt is being more and more widely used in solar thermal power generation, clean heating and other fields. The molten salt storage tank is the core device of the molten salt energy storage system. When the molten salt energy storage system is put into operation for the first time, before the molten salt is introduced into the storage tank, the air in the tank and the tank body need to be preheated to reduce thermal fusion. The temperature difference of the salt entering the storage tank avoids unfavorable phenomena such as deformation of the tank due to uneven stress of the tank caused by hot molten salt entering the tank, and ensures the smooth progress of the salt feeding process. [0003] In addition, the molten salt needs to maintain a ce...

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Problems solved by technology

[0004] In addition, the molten salt heat storage system has been out of service for a long time, and when it is put into operation again, it is necessary to supply heat to the solidified or viscous molten salt medium in the tank to liquefy it. The traditional solution uses electric heating rods to heat the molten salt in the storage tank. Salt medium heating, this method needs to arrange a large number of heating rods and cables; and the heating device needs to be installed on the tank wall, and its layout structure is complex, which has a great impact on the design of the storage tank. After the layout, there are many welds and great leakage risks; The heating range of the electric heating rod is limited by the layout coverage and insertion depth; the heating device of the electric heating rod also has various defects such as short life and difficult replacement.

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