High-temperature heat radiation type explosion-proof heater and control system

Abstract

The invention relates to a high-temperature heat radiation type anti-explosion heater and a control system, and belongs to the technical field of electric heating equipment. The structure comprises a vertical pressure pipeline, the surface of the vertical pressure pipeline is provided with a flexibly wound metal tubular electric heating element, the metal tubular electric heating element forms an explosion-proof wiring chamber, and temperature monitors are arranged on a medium inlet, a medium outlet, an upper surface and a lower surface of the vertical pressure pipeline. And the temperature monitor is electrically connected with the control cabinet. The metal tubular electric heating element has the beneficial effects that the limitation of the characteristics of process gas and the explosive environment requirement of an anti-explosion area is met, the surface temperature of the metal tubular electric heating element is controlled to be under the allowed flammable and explosive working conditions without flash explosion, the temperature rising speed is high, the safety performance of the anti-explosion area is high, the heat dissipation uniformity is good, the heating efficiency is high, and the cost is low. The device has the characteristics of high safety coefficient, stable performance, long service life, wide application range and the like.

Description

technical field [0001] The invention relates to a high-temperature thermal radiation type explosion-proof heater and a control system, belonging to the technical field of electric heating equipment. Background technique [0002] With the rapid development of industry and the continuous expansion of application fields, today's market, especially the chemical industry and environmental protection tail gas heat treatment industry, has an increasing demand for high-temperature flammable industrial gas auxiliary heating and heating equipment, especially for the safety performance of equipment in explosion-proof areas. Ascension, scientific and technological innovation products emerge in an endless stream. Originally, metal tubular electric heating elements were inserted into the process pipeline of the pressure vessel to directly heat the process medium. Under the condition that the equipment and process are inflammable and explosive, the temperature of the process gas generally ...

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Problems solved by technology

Originally, metal tubular electric heating elements were inserted into the process pipeline of the pressure vessel to directly heat the process medium. Under the condition that the equipment and process are inflammable and explosive, the temperature of the process gas generally does not exceed 300 ° C. Even if the electric heating tube is installed The replacement of materials (310S, Incoloy800, etc.) cannot meet the user’s process heating requirements, and the biggest defect is that due to the characteristics of the process gas and the restrictions on the explosive environment requirements of the explosion-proof area, it is necessary to control the surface temperature of the metal tubular heating element to the allowable flammable There is no flash explosion under explosive conditions, and the risk is very high. Once it fails to explode, the consequences will be disastrous

If electric heating tubes are used alone to design and manufacture a set of electric heater equipment to be connected with the process pressure pipeline, the number of metal tubular electric heating elements must be increased, the appearance and volume of the equipment must be increased, and the material of the heating elements needs to be imported from abroad for high-temperature resistant raw material accessories (Alloy625 nickel-chromium alloy Seamless steel pipe, high-purity magnesia powder imported from Japan, imported Cornell nickel-chromium alloy wire), the procurement cycle is long, the manufacturing cost is too high, there is no market competitive advantage, and the heating effect of the process is difficult to guarantee

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