Method and device for measuring decrepitation, expansion and shrinkage performance of lump coal

A technology of shrinkage performance and burstability, applied in the direction of material thermal expansion coefficient, material explosiveness, etc., can solve the problem that the detection method cannot visually observe the thermal bursting performance of coal with the naked eye, and achieve the effect of improving understanding

Active Publication Date: 2011-08-17
XINJIANG BAYI IRON & STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the previous detection methods can directly observe the expansion, contraction and thermal cracking performance of coal with the naked eye. , to provide a guarantee for t...

Method used

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  • Method and device for measuring decrepitation, expansion and shrinkage performance of lump coal
  • Method and device for measuring decrepitation, expansion and shrinkage performance of lump coal

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Embodiment 1

[0031] The device of the present invention comprises a heating system, a camera 12, a computer 13, a light source adjustment system and an atmosphere system; A water cooling system 4 is installed on the furnace tube.

[0032] The atmosphere system includes an air inlet 9 and an air outlet 8; the light source adjustment system includes a light source 2 and a light intensity controller 1 . The light intensity controller 1 is on one side of the furnace tube 3 . The top of the thermocouple 14 is in close contact with the sample substrate 7 .

[0033] The camera 12 is a digital camera, and its lens is a long focal length CCD lens 11, and the heating system is arranged directly in front of the CCD lens. The resolution of the CCD lens is ≥3 million pixels, and the adjustable focal length is ≥1.1m. The CCD lens 11 is connected with the main body of the camera 12 with a tiger skin; the CCD lens 11 is loaded with a filter and a filter.

[0034] Coal A with an ash content of 13.11%, ...

Embodiment 2

[0037] Coal B with an ash content of 16.27%, a fixed carbon content of 59.67%, a volatile matter content of 23.21%, and a moisture content of 0.85% was crushed to less than 0.05mm, and pressed into a block with a diameter of 20.5mm and a height of 12.1mm.

[0038] Put lump coal in Al 2 o 3 Place the substrate on the center of the furnace, adjust the CCD lens and light source to make the image seen by the camera the clearest, feed argon and cooling water into the furnace to start heating up, set the heating rate at 1.5°C / min in the stage of 300-500°C, and set the heating rate at 1.5°C / min in the rest stages The temperature is 3°C / min, the thermocouple selects an appropriate temperature point to take photos, and through computer processing, the maximum expansion rate of lump coal is 4.1%, and the maximum shrinkage rate is 35.4%.

[0039] Others are the same as embodiment 1.

Embodiment 3

[0041] Natural bulk coal C with an ash content of 13.11%, a fixed carbon content of 61.93%, a volatile matter content of 23.87%, and a moisture content of 1.09% was ground into a shape with a diameter of 10.3 mm and a height of 10.2 mm.

[0042] Put lump coal in Al 2 o 3 Place the substrate on the center of the furnace, adjust the CCD lens and light source to make the image seen by the camera the clearest, feed argon and cooling water into the furnace to start heating up, set the heating rate at 1.5°C / min in the stage of 300-500°C, and set the heating rate at 1.5°C / min in the rest stages The maximum expansion rate of lump coal is 4.7% and the maximum shrinkage rate is 37.5% through computer processing.

[0043] Others are the same as embodiment 1.

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Abstract

The invention provides a method and a device for measuring decrepitation, expansion and shrinkage performance of a lump coal. The device comprises a heating system, a camera, a computer, a light source adjustment system and an atmosphere system, wherein the heating system comprises a furnace tube, a quartz window, a sample substrate, a sample and a temperature measuring thermocouple, wherein the top of the thermocouple contacts the sample substrate closely; the lens of the camera is a long-focus charge coupled device (CCD) lens; and the heating system is arranged right ahead of the CCD lens. The method comprises the following steps: heating a lump coal sample in the device; selecting a proper temperature point to collect an image when the image is clear; calculating the expansion rate and shrinkage rate of the volume. The pyrolyzation and degassing processes of the lump coal can be visually observed at different temperatures through providing a visual device and the measurement method; the expansion and shrinkage behavior and the decrepitation of the lump coal can be indirectly measured through image collecting, thus providing guidance basis for the use of the lump coal in a melting gasification furnace.

Description

technical field [0001] The invention relates to a device and method for measuring the thermal burstability and expansion and contraction properties of lump coal, in particular to a device and method for indirectly measuring the expansion and contraction properties of lump coal by using a camera to collect images of lump coal under heating conditions. Background technique [0002] my country has abundant coal resources, and in the process of energy utilization, the dependence on coal is relatively large. For the processing and utilization of coal, coal workers have carried out many aspects of work. The utilization of coal in the industrial field is mainly in three aspects, utilizing coal for gasification to obtain synthesis gas (CN1721511A, CN86105896) for preparing methanol or as reducing gas; utilizing coal for high-temperature dry distillation to produce coke (CN1171807A, CN1465656A) Iron production in blast furnaces; due to the lack of petroleum resources, the use of dir...

Claims

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Application Information

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IPC IPC(8): G01N25/54G01N25/16
Inventor 王玉明张群钱晖李肇毅
Owner XINJIANG BAYI IRON & STEEL
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