Molten salt heat exchanger for intelligently controlling heat exchange flowing speed

Abstract

The invention provides a molten salt heat exchanger with intelligent control of heat exchange flow rate, which is used for heat exchange between cold salt and hot salt. The molten salt heat exchanger at least includes: an outer shell; The first tube sheet and the second tube sheet at both ends; the heat exchange tube fixed between the first tube sheet and the second tube sheet, the heat exchange tube includes a straight tube and a spiral tube communicating with the straight tube ; The hot salt inlet, hot salt outlet and cold salt outlet arranged on the top of the shell; there are also cold salt inlets arranged at the bottom of the shell, several cold salt passages arranged between the cold salt inlet and the cold salt outlet, and the Intelligent control valves at both ends of each cold salt channel and temperature sensing devices arranged on the cold salt channel and heat exchange tubes. The molten salt heat exchanger of the present invention can realize intelligent control through an intelligent control valve and a temperature sensing device, and can well match the heat exchange flow rate of hot salt and cold salt to achieve better heat exchange effect.

Description

technical field [0001] The invention relates to the field of molten salt heat exchangers, in particular to a molten salt heat exchanger with intelligent control of heat exchange flow rate. Background technique [0002] At present, solar power plants with heat storage function in the field of photothermal power generation use molten salt as the heat storage medium. By converging sunlight on the molten salt heat absorber, the temperature of the molten salt rises, and then the molten salt is introduced into the heat storage tank to store heat. The heat in the molten salt is converted into the heat of the working medium of the Rankine cycle through the heat exchanger. Generally, water is used as the working medium of the Rankine cycle. The liquid water absorbs heat in the heat exchanger and becomes superheated steam to drive the steam turbine to generate electricity. When the molten salt flows in the heat exchanger and its intermediate heat exchange tubes, the most important poi...

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Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a molten salt heat exchanger with intelligent control of the heat exchange flow rate, so as to solve the problem that the heat exchange flow rate between cold salt and hot salt often cannot be well matched , to improve the heat transfer effect of the shell and tube heat exchanger

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