Electric heater for preheating and solidification prevention of high-temperature molten salt conveying pipe

Abstract

The invention relates to an electric heater for preheating and solidification prevention of a high-temperature molten salt conveying pipe, and belongs to the technical field of electric heating in electrics. The electric heater comprises an electric heating pipe which is wound around the outer wall of the high-temperature molten salt conveying pipe or an electric heating pipe which is laid in parallel along the high-temperature molten salt conveying pipe and is close to the lower part of the high-temperature molten salt conveying pipe. The electric heating pipe is made of a high-temperature nichrome resistance wire which sequentially passes through a plurality of insulating fixed parts and is sleeved by a high-temperature fiber sleeve. The electric heater is simple in overall structure, is short in heating time, is high in work temperature, can reach the start temperature of a conveying pipe device in a shorter time, and achieves the effective preheating and solidification prevention of the high-temperature molten salt conveying pipe.

Description

technical field [0001] The invention relates to an electric heater for preheating and anti-freezing of a high-temperature molten salt transmission pipeline, in particular to an electric heater for preheating and anti-solidification of a high-temperature molten salt transmission pipeline with simple overall structure, short heating time and high working temperature. heater. Background technique [0002] In recent years, with the expansion of the use of molten salt (binary or ternary salt), it has been widely used in photothermal and heat transfer technology. As a heat transfer medium, molten salt can reach a higher temperature and has a better heat storage function. Therefore, molten salt is currently a more mature heat transfer and heat storage medium that is widely used. [0003] At present, the molten salt heat transfer and heat storage media used abroad are mainly binary nitrate system (40% KNO3 ~ 60% NaNO3, working temperature range is 260°C ~ 600°C) and ternary nitrate...

AI Technical Summary

Problems solved by technology

However, the existing steam heating or electric heating cables are far from meeting the industrial requirements for preheating and preventing solidification of the molten salt in the high-temperature molten salt transmission pipeline.

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