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Method and device for measuring dynamic thermal stability of solid particles

A solid particle and thermal stability technology, which is applied in the direction of analyzing materials and instruments, can solve the problems that solid particles cannot truly reflect the degree of crushing and pulverization of solid particles, the difference is huge, and there is no test method and standard for semi-coke.

Active Publication Date: 2015-08-19
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • 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 device for measuring dynamic thermal stability of solid particles
  • Method and device for measuring dynamic thermal stability of solid particles
  • Method and device for measuring dynamic thermal stability of solid particles

Examples

Experimental program
Comparison scheme
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specific Embodiment approach 1

[0090] Specific embodiment 1: Determination method of dynamic thermal stability of coal

[0091] 1. Prepare an air-dried coal sample with a particle size of 6-13mm, about 1.5Kg, according to GB474, and take 500cm after mixing. 3 Weigh the coal sample (weigh accurately to 0.01g).

[0092] 2. Load the coal sample into the rotating drum 6, and connect the rotating drum 6 to the rotating shaft 11. Close the intake pipe 4 and exhaust pipe 5 to isolate the air, and quickly send the rotating drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. (If the gas heat carrier heating mode is examined, the hot gas is passed through the intake pipe 4 Into the rotating drum, the gas is discharged from the exhaust pipe 5 through the thickness of the coal seam.) Turn on the rotating switch, set the speed to 50r / min, adjust the furnace temperature to (850±15) ℃, and rotate the coal sample at this temperature for 30 minutes . When the coal sample is just s...

specific Embodiment approach 2

[0107] Specific implementation manner 2: Determination method of dynamic thermal stability of semi-coke

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

[0109] 2. Load the semi-focus sample into the rotating drum 6, and connect the rotating drum 6 to the rotating shaft 11. Close the intake pipe 4 and exhaust pipe 5 to isolate the air, and quickly send the rotating drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. (If the gas heat carrier heating mode is examined, the hot gas is passed through the intake pipe 4 Into the drum, the gas is discharged through the exhaust pipe 5 through the thickness of the coal seam.) Turn on the rotary switch, set the speed to 50r / min, and adjust the furnace temperature to (850±15) ℃, so that the semi-coke sample rotates at this temperature ...

specific Embodiment approach 3

[0124] Specific embodiment three: dynamic thermal stability measurement method of briquette

[0125] 1. From the industrial briquette samples taken in accordance with MT / T915, pick out the crack-free and basically complete briquette, randomly select about 500g briquette (about 10), and weigh the quasi-mass to 0.01g.

[0126] 2. Load the coal sample into the rotating drum 6, and connect the rotating drum 6 to the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the rotating drum 6 into the constant temperature zone of the heating furnace 12 that has been preheated to 900°C. (If the gas heat carrier heating mode is examined, the hot gas is removed from the intake pipe 4 Into the drum, the gas is discharged through the exhaust pipe 5 through the thickness of the coal seam.) Turn on the rotary switch, set the speed to 50r / min, and adjust the furnace temperature to (850±15) ℃, so that the coal sample is at this temperature Rotate fo...

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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 measuring the thermal stability of coal, and specifically relates to a method and device for measuring the thermal stability of solid particles such as coal, semi-coke, briquettes or coal-based activated carbon under dynamic conditions. Background technique [0002] Thermal stability is one of the important basis for the combustion, pyrolysis and gasification of solid particles such as coal, semi-coke and briquette. Thermal stability refers to the degree of stability of solid particles under the action of heat during high-temperature combustion, pyrolysis, and gasification, that is, the performance of a certain particle size coal sample to maintain the original particle size after being heated. Coal with good thermal stability can be burned or pyrolyzed and gasified at its original particle size during combustion, pyrolysis, and gasification without being broken into small pieces or less broken. Coal with poor thermal ...

Claims

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Application Information

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Patent Type & Authority Patents(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