Combined type direct-heating resistance furnace

Abstract

The invention discloses a combined type direct-heating resistance furnace. The combined type direct-heating resistance furnace is composed of a heating unit set and a heat exchange system, wherein the heating unit set is composed of a plurality of resistance heating units, and each resistance heating unit is composed of a unit shell, a resistance heater assembly, an insulating heat-conducting medium, an insulating sleeve, a medium outlet, a medium inlet and an insulating layer; each resistance heater assembly is composed of a metal wire and a structural component used for supporting and fixing the conducting and heating metal wire; the heat exchange system is composed of a plurality of sets of medium circulating pumps, a medium heat exchanger and a heat circulating pipeline. According to the combined type direct-heating resistance furnace, the resistance heating units are interchangeable, and the working voltage and heating power of the combined type direct-heating resistance furnace can be changed by changing the mode of wire connection between the resistance heating units; due to the fact that the resistance heater assemblies are immersed in the insulating heat-conducting medium, the insulation grade of the resistance heater assemblies is improved, the sizes of the resistance heating units are reduced, and equipment instillation area is reduced; the combined type direct-heating resistance furnace can work reliably by manufacturing the unit shells with normal-pressure vessels.

Description

technical field [0001] The invention relates to a combined direct heating resistance furnace, in particular to a kind of electric resistance heater which is supplied by a voltage level power supply of 2.5kv to 220kv, immersed in an insulating and heat-conducting medium, and heated by a resistance heater, and completes heat exchange through a heat exchanger. Heat output device. Background technique [0002] In the past, in the application of electrothermal conversion that does not require heat storage, a resistance heater immersed in water is usually used to heat water and directly output hot water. When the working voltage is greater than 0.4 kV voltage level, the resistance of the resistance heater to water will increase When the operating voltage reaches 2.5kv or more, the resistance heater immersed in water will be broken down due to excessive leakage current, making the resistance heater unable to work. Therefore, it is necessary to design a direct heating resistance he...

AI Technical Summary

Problems solved by technology

[0002] In the past, in electrothermal conversion applications that do not require heat storage, a resistance heater immersed in water is usually used to heat water and directly output hot water. When the working voltage is greater than 0.4 kV voltage level, the resistance of the resistance heater to the water will be increased. leakage current, when the working voltage reaches 2.5kv or more, the resistance heater immersed in water will be broken down due to excessive leakage current, making the resistance heater unable to work

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