Method and apparatus for measuring dynamic thermal stability of solid particles

A solid particle, thermal stability technology, applied in the direction of analyzing materials, instruments, etc., can solve the problem that solid particles cannot truly reflect the degree of crushing and pulverization of solid particles, cannot guide production, design, and there is no semi-coke test method and standard, etc. question

Active Publication Date: 2013-07-10
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the determination of the thermal stability of solid particles in the above two national standard measurement methods cannot truly reflect the degree of crushing and pulverization of solid particles in the actual process, because they do not take into account the collision and mechanical wear between particles in the actual industrial process , the result obtained is only the static thermal stability index of the sample
The results of this static thermal stability test are very different from the actual industrial utilization process, and cannot play a role in guiding production and design
In addition, despite the rapid development of medium and low temperature pyrolysis technology and the continuous increase in semi-coke production, there are still no relevant test methods and standards for semi-coke
For coal-based activated carbon, only its strength was tested in GB / T7702.3-2008 "Determination of the Strength of Coal-based Granular Activated Carbon Test Method", and no relevant thermal stability determination was used.

Method used

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  • Method and apparatus for measuring dynamic thermal stability of solid particles
  • Method and apparatus for measuring dynamic thermal stability of solid particles
  • Method and apparatus for measuring dynamic thermal stability of solid particles

Examples

Experimental program
Comparison scheme
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specific Embodiment approach 1

[0090] Specific implementation mode one: dynamic thermal stability determination method of coal

[0091] 1. According to the provisions of GB474, prepare about 1.5Kg of air-dried coal samples with a particle size of 6-13mm, and take 500cm after mixing. 3 Coal sample, weighing (accurate to 0.01g).

[0092] 2. Put the coal sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. into the drum, the gas is discharged through the exhaust pipe 5 through the coal seam thickness.) Turn on the rotary switch, set the speed at 50r / min, adjust the furnace temperature to (850±15)°C, and make the coal sample rotate at this temperature for 30min . When the coal sample is just sent into the heating furnace 12, the furnace temperature may drop, and at this time, it is required to restore t...

specific Embodiment approach 2

[0107] Specific implementation mode two: method for measuring dynamic thermal stability of semi-coke

[0108] 1. Prepare about 1.5Kg of an air-dried semi-coke sample with a particle size of 6-13mm according to the provisions of GB474. After mixing, take a 500cm3 semi-coke sample and weigh it (accurate to 0.01g).

[0109] 2. Put the semi-coke sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. into the rotating drum, and the gas is discharged through the exhaust pipe 5 through the thickness of the coal seam.) Turn on the rotary switch, set the rotating speed at 50r / min, adjust the furnace temperature to (850±15)°C, and make the semi-coke sample rotate at this temperature 30min. When the semi-coke sample is just sent into the heating furnace 12, the furnace temperature m...

specific Embodiment approach 3

[0124] Specific implementation mode three: dynamic thermal stability determination method of briquette

[0125] 1. From the industrial briquette samples taken in accordance with the regulations of MT / T915, select the briquettes without cracks and basically complete, randomly select about 500g of briquettes (about 10 pieces), and weigh the quasi-quality to 0.01g.

[0126] 2. Put the molded coal sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900 °C in advance. into the drum, and the gas is discharged from the exhaust pipe 5 through the thick coal seam.) Turn on the rotary switch, set the speed at 50r / min, and adjust the furnace temperature to (850±15)°C, so that the briquette sample is at this temperature Turn for 30min. When the briquette sample is just sent into the heat...

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Abstract

The invention discloses a method and an apparatus for measuring dynamic thermal stability of solid particles. The method, while heating the solid particles, enables the solid particles to move so as to realize mutual friction and collision among the solid particles. The apparatus comprises an actuating mechanism, a motion mechanism and a heating mechanism for heating the solid particles, wherein the solid particles are put into a rotating cylinder used as the motion mechanism, and the rotating cylinder is driven by the actuating mechanism to rotate. According to the invention, dynamic thermal stability of coal, semi-coke, activated carbon, coke, briquette and other solid particle samples can be stimulated under conditions of different temperature, heating ways, heating rates, environment atmospheres and rotating speeds of the rotating cylinder, that is, crushing and pulverization of the solid particle samples subjected to thermal stress, mechanical wear and particle collision in the rotating cylinder can be obtained through tests, thereby truly reflecting a crushing and pulverization degree of the solid particles during a practical industrial utilization process, and thus building a determination standard which is about dynamic thermal stability of the solid particles and is relatively close to the reality.

Description

technical field [0001] The invention belongs to the field of thermal stability measurement of coal, and in particular relates to a thermal stability measurement method and device for solid particles such as coal, semi-coke, briquette or coal-based activated carbon under dynamic conditions. Background technique [0002] Thermal stability is one of the important bases for solid particles such as coal, semi-coke, and briquettes in combustion, pyrolysis, and gasification. Thermal stability refers to the degree of stability of solid particles under the action of heat during high-temperature combustion or pyrolysis and gasification, that is, the performance of a coal sample with a certain particle size maintaining its original particle size after being heated. Coal with good thermal stability can be burned or pyrolyzed and gasified with its original particle size during combustion, pyrolysis, and gasification without breaking into small pieces or less fragmentation. Coal with poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00
Inventor 田亚峻芦海云崔鑫孔德婷刘科
Owner CHNA ENERGY INVESTMENT CORP LTD
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