Filling bed type gas electrically heating device

Abstract

A filling bed type gas electrically heating method is used for the electric heating field. The present invention includes an air intake, an air chamber, a grid plate, a resistance wire, a electric insulation conduction bulk material, a fire-resisting duct, a resistance wire retrace branch tray, an uptake, a grid area and a heating zone. A horizontal uniform grid plate is arranged on the bottom of the fire-resisting duct, wherein the duct is provided on the grid plate. Below the grid plate is positioned with the air chamber connecting with the air intake. The resistance wire are uniformly arranged in the duct and between the duct wall surface and the resistance wire are filled with charging insulation conduction bulk material. On the top of the bulk material filling bed is arranged with a resistance wire retrace branch tray with a uniform perforate. The resistance wire turns back in the filling bed through the resistance wire retrace branch tray. Two terminals of the resistance wire are educed from the joints of the duct and the grid plate. The invention can heat the mass flow gas temperature higher than 800 degree in a narrow space, to avoid the jam due to the limited space, which can improve the gas heat exchange efficiency to avoid the meaningless waste of the electric energy.

Description

technical field [0001] The invention relates to an electric heating device, in particular to a packed-bed gas electric heating device, which is used in the field of electric heating. technical background [0002] Utilizing the Joule effect of electric energy to heat gas is a method commonly used in industry, laboratory and civilian use. Generally speaking, under the premise of constant gas type, inlet temperature and flow rate, the higher the heating temperature of the gas, the greater the power of the electric heating device and the larger the volume. This is because the high temperature of the gas means that the heat energy of the gas is large, and according to the law of energy conservation, a corresponding amount of electric energy is required to convert. In practice, the gas and the electric heating element can directly contact and exchange heat or indirectly exchange heat through the circulation pipe. However, due to the small heat transfer coefficient per unit area a...

AI Technical Summary

Problems solved by technology

Although the patent fills the shell with steel balls, the steel balls and the cast aluminum electric heater are outside the air pipe, without direct heat exchange, and the heat exchange efficiency is low. Under the same flow conditions, the device required for heating to high temperature is large in size

Using steel balls as filler also reduces the safety performance of the electric heating system

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