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High temperature air heater

A high-temperature air and heater technology, used in air heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of shortening the service life of heaters, increasing the temperature of electric heating elements, and inability to air heating, and achieve temperature control. Convenience, small resistance to air circulation, prolonging service life

Inactive Publication Date: 2004-02-11
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to make the air temperature reach above 600°C, or even above 1000°C, due to the small heat transfer coefficient between the air and the electric heating element, the air cannot take away the heat generated by the electric heating element in time, resulting in the continuous rise of the temperature of the electric heating element, which is easy Cause over-temperature burning problem, shorten the service life of the heater
Alternatively, the air cannot be heated to the set temperature

Method used

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Embodiment

[0015] 20Nm 3 The air in / h is heated from 20°C to 1000°C as an example, the diameter of the lotus root-shaped ceramic body 5 is 70-85mm, and there are 12 inner through-holes 9, which are evenly distributed, and each through-hole diameter is 8-12mm. The total length of the lotus root-shaped ceramic body is 850-1100 mm. 12 thin ceramic rods with a diameter of 5-7 mm are wound with heating wires with a diameter of 0.8-1.2 mm, and placed in the through hole of the lotus root-shaped ceramic body. Each heating wire passes through one end of the lotus root-shaped ceramic body into the through hole, and passes back through another through hole at the other end, forming a U-shaped loop. The rated power of each heating wire is 2kW, and there are six in total. Two kinds of thermal insulation material layers 3 and 4 are arranged outside the lotus root shape ceramic body 5, to improve thermal insulation effect. The required high-temperature air heater is obtained after being packaged b...

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Abstract

The present invention relates to one high temperature air heater comprising lotus root-shaped ceramic body, heat insulating layer, casing, thermocouple and containing wires. The ceramic body has several through holes, inside which there are ceramic rods wound with electrothermal wire. The ceramic body is set inside heat insulating layer and the thermocouple is set in one end of ceramic body. Air is made to enter the ceramic from one end and heated by electrothermal wire and the ceramic body. The heater has high heat efficiency, small volume, convenient temperature control and long servicelife.

Description

technical field [0001] The invention belongs to the technical field of air heating, in particular to a high-temperature air heater. Background technique [0002] Ordinary air heaters can only heat the gas below 600°C. In order to obtain high temperature air above 600°C, two heating methods can be adopted - flame heating or electric heating. Among them, the flame heating method must use a non-metallic heat exchanger with high temperature resistance and oxidation resistance. Due to the difficulty in sealing non-metallic heat exchangers in high-temperature environments, high-temperature flue gas and air are easily mixed together, and it is difficult to adjust the air temperature. There are problems such as environmental pollution and huge equipment. The electric heating method has the advantages of convenient air temperature adjustment, small heating equipment, and flexible movement. However, in order to make the air temperature reach above 600°C, or even above 1000°C, due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H3/04
Inventor 朱彤
Owner TONGJI UNIV
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