Junction box capable of preventing overheating and damp for waste nitrogen electric heater

Abstract

The invention relates to a junction box capable of preventing overheating and damp for a waste nitrogen electric heater, including: a junction box casing, the ends of the junction boxing casing respectively provided with a cooling shielding gas inlet joint pipe and a cooling shielding gas outlet joint pipe. The junction box also is provided therein an anti-condensing system which includes an anti-condensing electric heater, a temperature detector and a temperature controller, the anti-condensing electric heater fixedly connected to the inner wall of the junction box casing and keeping a distance with the inner wall, the temperature detector and the temperature controller mounted on the inner wall of the junction box casing and far from the anti-condensing electric heater, the temperature controller in individual electrical connection with the anti-condensing electric heater and the temperature detector. The junction box herein increases stability of the waste nitrogen electric heater such that the waster nitrogen electric heater is enabled to work under circumstances when the temperature of the waste nitrogen gas to be heated is too high and the damp in the surroundings is too high, and thus expands use coverage of the waste nitrogen electric heater.

Description

technical field [0001] The invention relates to the field of junction boxes, in particular to a junction box for a sewage nitrogen electric heater used in an air separation unit capable of preventing overheating and humidity. Background technique [0002] Contaminated nitrogen gas is a gas required for the air separation process in which nitrogen accounts for an absolute proportion and other gases such as oxygen and argon account for a very small proportion. Polluted nitrogen electric heater is a kind of air separation equipment for heating polluted nitrogen gas. When the nitrogen-contaminated electric heater is in operation, it is affected by the heat transfer of the electric heating tube and the tube plate, and the temperature in the junction box is generally high, which will affect the life of the cables in the junction box and other components that are prone to aging due to high temperature. Especially when the temperature of the contaminated nitrogen gas at the inlet o...

AI Technical Summary

Problems solved by technology

[0006] However, the above two measures cannot cope with all working conditions: for the electric heaters with high ambient temperature and

Images