Electric heater for high-pressure small-flow ultralow-temperature fluid

Abstract

The invention discloses a high-pressure small-flow ultralow-temperature fluid electric heater which comprises a heater cylinder, an electric heating tube bundle is arranged in the heater cylinder, and a medium tube is arranged between the electric heating tube bundle and the inner wall of the heater cylinder. The space between the electric heating tube bundle and the medium tube is filled with a heat conduction material, and the space between the medium tube and the first end of the heater cylinder is filled with a heat insulation material; heat preservation devices are arranged on the outer side of the second end and the outer side of the side wall of the heater barrel, and an inlet and an outlet of the medium pipe extend to the outside through the heater barrel and the heat preservation devices. The heat exchanger has the advantages of being simple in overall structure, low in cost, compact in internal space, large in medium flow speed, large in heat exchange coefficient and beneficial to small-flow medium heat exchange.

Description

technical field [0001] The invention relates to the field of low temperature heating, in particular to an ultra-low temperature fluid electric heater used for high pressure and small flow. Background technique [0002] In the ultra-low temperature test, it is usually necessary to heat the ultra-low temperature fluids such as liquid nitrogen, liquid methane, liquid oxygen, liquid hydrogen, and liquid helium to temperature, gasify them to normal temperature or control the temperature for testing, emptying, and collection. Common low-temperature heaters usually install a stainless steel electric heating tube into the heating container to heat the flowing medium. It is suitable for low-pressure or normal-pressure media. Only when the wall thickness of the heating container is very thick, it can withstand high pressure, but its structure is relatively cumbersome and the cost is high. The internal space is large, the medium flow rate is small, and the heat transfer coefficient is ...

AI Technical Summary

Problems solved by technology

Common low-temperature heaters usually install stainless steel electric heating tubes in the heating container to heat the flowing medium. They are suitable for low-pressure or normal-pressure media. The internal space is large, the medium flow rate is small, and the heat transfer coefficient is small, which is not conducive to the heat exchange of small flow medium

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