Intermediate frequency molten salt electric heating device based on annular tube bundle heater

Abstract

The invention provides an intermediate frequency molten salt electric heating device based on an annular tube bundle heater, which belongs to the technical field of molten salt storage and heating. The device comprises a controller, an intermediate frequency power supply, an induction coil, a lock ring outside a tube bundle, an annular molten salt heating tube bundle and a tube bundle fixing ring. The controller is connected with the intermediate frequency power supply to control the output current of the intermediate frequency power supply to realize load regulation and monitoring. The intermediate frequency power supply is a power conversion device, is connected with the induction coil, and can provide intermediate frequency current for the induction coil. The induction coil is wound on the outside of the annular molten salt heating tube bundle according to a certain number of turns. The lock ring outside the tube bundle is close to the outside of the annular molten salt heating tube bundle and fixes the annular molten salt heating tube bundle on the tube bundle fixing ring. The tube bundle fixing ring is located inside the annular molten salt heating tube bundle. The lock ring outside the tube bundle, the annular molten salt heating tube bundle and the tube bundle fixing ring are fixedly connected by welding. According to the device, the heat exchange efficiency is improved; the processing is simple; the device size can be effectively reduced; the floor space is saved; and the investment cost can be greatly reduced.

Description

Technical field: [0001] The invention provides an intermediate frequency molten salt electric heating device for annular tube bundles to solve the problem of electric heating in molten salt heat storage projects, and belongs to the technical field of molten salt heat storage heat supply. Background technique: [0002] In recent years, the phenomenon of abandoning wind and light in my country has become more and more serious, resulting in a great waste of wind energy and solar energy, hindering the smooth development of renewable energy; in winter, due to the increase in coal consumption, smog has seriously affected northern my country, which has affected to the daily life of the people. Beijing, Hebei, the three northeastern provinces and other provinces and cities have issued low-peak electricity and coal-to-electricity policies to consume off-peak electricity and reduce coal consumption. It is an important way to solve the above problems by using abandoned wind and photovo...

AI Technical Summary

Problems solved by technology

However, according to heat transfer calculations, for a single-pass molten salt induction heating device, due to the high heat flux density of the tube wall, it is difficult for the molten salt in a turbulent state to take away the heat generated by the tube wall, which will cause the tube wall temperature to continue. safety accident

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