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System and method for measuring equivalent heat conductivity coefficient

A technology of equivalent thermal conductivity and measurement system, which is applied in the direction of material thermal development, can solve the problems of not being able to obtain the relationship between the thermal physical properties of loose coal with temperature and the inability to obtain the thermal physical properties of loose coal at high temperatures, and achieve infinite The effect of gas emissions

Active Publication Date: 2014-12-10
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology can only measure the thermophysical properties of loose coal at room temperature, and cannot obtain the thermophysical properties of loose coal at high temperature, so it cannot obtain the relationship between the thermal physical properties of loose coal with temperature

Method used

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  • System and method for measuring equivalent heat conductivity coefficient
  • System and method for measuring equivalent heat conductivity coefficient
  • System and method for measuring equivalent heat conductivity coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The best embodiment one: particle diameter is the mensuration of 30mm coal block equivalent thermal conductivity

[0076] 1. Insert a nickel-chromium heating wire with a diameter of 0.5mm on the axis of the sample cylinder, and set two thermocouple measuring points at 3mm and 5mm from the center of the hot wire, and ensure that the two thermocouple measuring points are in the same radial direction. on flat surface.

[0077] 2. Weigh 3.01kg of lump coal and randomly pile them in the sample cylinder, install a graphite gasket on the top of the sample cylinder, cover the cylinder cover, and pass the hot wire and thermocouple through the sealing tube on the cylinder cover, and use rubber The cap seals the sealing tube.

[0078] 3. Connect the gas collection pipe with the gas collection system; the upper part of the cylinder cover is connected with the circulating water device, and the circulating cooling water is introduced; the hot line is connected with the DC power supp...

Embodiment 2

[0084] The best embodiment two: particle diameter is the mensuration of 5mm solid waste equivalent thermal conductivity

[0085] 1. Insert a nickel-chromium heating wire with a diameter of 0.5mm on the axis of the sample cylinder, and set two thermocouple measuring points at 3mm and 5mm from the center of the hot wire, and ensure that the two thermocouple measuring points are in the same radial direction. on flat surface.

[0086] 2. Weigh 2.65kg of solid waste and randomly pile them in the sample cylinder, install a graphite gasket on the top of the sample cylinder, cover the cylinder cover, and pass the hot wire and thermocouple through the sealing tube on the cylinder cover, and use rubber The cap seals the sealing tube.

[0087] 3. Connect the gas collection pipe with the gas collection system; the upper part of the cylinder cover is connected with the circulating water device, and the circulating cooling water is introduced; the hot line is connected with the DC power su...

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Abstract

The invention relates to a system and a method for measuring an equivalent heat conductivity coefficient. The system comprises a sample cylinder, a heating system, a gas collection system and a data acquisition processing system, wherein the sample cylinder comprises a sample cylinder body and a sample cylinder cover; the heating system comprises a heating device, a direct current stabilized voltage supply and an alternating current power supply; the gas collection system comprises a gas collection pipe and a gas collection device; the data acquisition processing system comprises a detection device, a data acquisition device and a data processing device; the cylinder wall of the sample cylinder body comprises a heating element, a thermal insulation layer and a shell from interior to exterior; the sample cylinder cover comprises an upper cylinder cover and a lower cylinder cover; the upper cylinder cover and the lower cylinder cover are connected through the gas collection pipe and a sealing pipe; a graphite washer is arranged between the sample cylinder cover and the sample cylinder body; the heating device is arranged at an axis position of the sample cylinder; the gas collection device collects gas from interior of the sample cylinder through the gas collection pipe; and the detection device is arranged at a position, which deviates from the axis of the sample cylinder, inside the sample cylinder.

Description

technical field [0001] The invention relates to a system and method for measuring the equivalent thermal conductivity, and is especially suitable for measuring the equivalent thermal conductivity of materials that generate gas through pyrolysis. Background technique [0002] Thermal conductivity refers to the heat that passes through a unit area of ​​a material per unit time under the action of a unit gradient. This physical quantity is an important parameter that characterizes the thermal conductivity of a material. The accumulated bulk material can be regarded as a combination of multi-phase substances. For example, the accumulated lump coal is a combination of coal, moisture in coal and gas in the gap. The heat transfer mechanism in the combination is extremely complex, including three modes of heat conduction, convection and radiation. Therefore, the thermal conductivity of the block material is essentially the apparent parameter of the three heat transfer forms and the ...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 吴道洪郑倩倩郭启海丁力
Owner SHENWU TECH GRP CO LTD
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