Visualized heating furnace

A heating furnace and heating element technology, applied in the field of heating furnaces, can solve the problems of insufficiency, complex structure, high temperature loss of gold coating, etc., and achieve the effect of thermal insulation

Active Publication Date: 2014-03-26
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its biggest disadvantage is that only when the operating temperature is greater than 700 ° C, the materials inside the electric furnace can be clearly seen
Therefore, it cannot meet the needs of visualization experiments below 700 °C
Moreover, in order to avoid the high temperature loss of the gold coating, a cooling jacket is required, and the structure is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The diameter of the inner tube is 60mm and the height is 300mm; the diameter of the middle tube is 105mm and the height is 300mm; the diameter of the outer tube is 150mm and the height is 300mm. A support frame is provided on the outer wall of the inner tube, and there is a card slot on the support frame. The heating element is a silicon carbide rod with a diameter of 8mm. The thermal insulation coating on the outer wall of the middle tube is a gold-plated coating with a thickness of 50nm; There is a metal-free observation window (length 30mm, width 10mm) along the radial direction. The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.

[0055] The implementation results are as follows:

[0056] The heating power can reach 2000W, and the maximum heating temperature is 1000°C. It takes 40 minutes to program the temperature from room temperature to 1000°C, and...

Embodiment 2

[0058] The diameter of the inner tube is 100mm and the height is 800mm; the diameter of the middle tube is 150mm and the height is 800mm; the diameter of the outer tube is 250mm and the height is 800mm. The outer wall of the inner tube is provided with a spiral groove, the heating element is a silicon-molybdenum rod with a diameter of 5.0mm, and the thermal insulation coating on the outer wall of the middle tube is a nickel-tungsten alloy coating with a thickness of 20nm; There is a metal-free observation window (length 300mm, width 100mm). The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.

[0059] The implementation results are as follows:

[0060] The heating power can reach 5000W, the maximum heating temperature is 1100°C, it takes 20 minutes to program the temperature from room temperature to 1000°C, and the error is less than 1°C; it can run stably for a l...

Embodiment 3

[0062] The diameter of the inner tube is 40mm and the height is 350mm; the diameter of the middle tube is 125mm and the height is 350mm; the diameter of the outer tube is 180mm and the height is 350mm. The outer wall of the inner tube is provided with a spiral groove, and the heating element is made of Cr20Ni80 high temperature resistant resistance wire with a diameter of 1.0mm. There is a metal-free observation window (length 80mm, width 30mm) in the radial direction. The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.

[0063] The implementation results are as follows:

[0064] The heating power can reach 1000W, the maximum heating temperature is 950°C, it takes 45 minutes to program the temperature from room temperature to 900°C, and the error is less than 1°C; it can run stably for a long time at 900°C, and the heating current is not higher than 3A. Under an...

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Abstract

The invention relates to a visualized heating furnace, in particular to a visualized heating furnace for a fluidized bed reactor. An inner tube and a middle tube are sequentially arranged in a furnace body from inside to outside; heating elements are installed on the outer wall of the inner tube; a thermal insulation coating is arranged on the outer wall of the middle tube, and a watch window is formed in the middle in the longitudinal direction of the thermal insulation coating. The heating power of the visualized fluidized bed heating furnace ranges from 500W to 5000W, the heating temperature of the visualized fluidized bed heating furnace is not lower than 900DEG C, and the heating rate of the visualized fluidized bed heating furnace is adjustable. The visualized heating furnace is simple in structure, small in investment, capable of serving as a heating device for laboratory scientific research and especially suitable for observing flowing and fluidizing behaviors of particles being heated in the fluidization research field.

Description

technical field [0001] The invention relates to a heating furnace used for scientific research in the fields of chemistry, chemical industry, metallurgy, biology and the like, in particular to a visualization heating furnace applied in the field of fluidization. Background technique [0002] Particle fluidization technology has the characteristics of mass transfer, fast heat transfer, and uniform gas-solid reaction. It has been widely used in traditional and emerging industries such as coal chemical industry, petrochemical industry, iron and steel metallurgy, biomedicine, and nanomaterial preparation. and an important means of material synthesis. In the gas-solid fluidized bed, the acquisition of dynamic fluidization characteristics such as the flow behavior of single particles and particle aggregates, the fluidization quality, the size of the bubbles, and the state of motion can be used for the design and scale-up of the gas-solid fluidized bed, and the study of the reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B17/02F27D21/02F27D11/02
Inventor 李军朱庆山李洪钟芦亚军
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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