CN102042941A - Device and method for testing deflagration property of coal powder - Google Patents
Device and method for testing deflagration property of coal powder Download PDFInfo
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- CN102042941A CN102042941A CN 201010554692 CN201010554692A CN102042941A CN 102042941 A CN102042941 A CN 102042941A CN 201010554692 CN201010554692 CN 201010554692 CN 201010554692 A CN201010554692 A CN 201010554692A CN 102042941 A CN102042941 A CN 102042941A
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Abstract
The invention discloses a device and method for testing the deflagration property of coal powder. The device consists of a deflagration tank, a high-pressure air source, a sensor and a data analysis processor; the deflagration tank is provided with a coal powder inlet; a powder storage cabin is arranged at the coal power inlet; the high-pressure air source is communicated with the powder storage cabin through a high-pressure air pipe; the deflagration tank is internally provided with a high-voltage electrode; and the sensor is arranged on the deflagration tank and electrically connected with the data analysis processor. The device and the method can be used for rapidly testing the deflagration property of coal powder and are simple and practical.
Description
Technical field
The present invention relates to a kind of coal dust deflagration behavior determinator and assay method.
Background technology
In fuel-burning power plant pulverized coal preparation and the combustion process, usually can run into coal dust detonation problem, particularly in bin storage type pulverizing system, because coal dust stacking link is many, pulverized coal preparation system is easy to because spontaneous combustion of pulverized coal causes detonation.Improvement and development along with the boiler milling system design, heavy duty boiler has substantially all adopted unit pulverized-coal system, reduced the link of coal dust because of the easy spontaneous combustion of stacking state, and primary air velocity also is chosen for higher value, prevent the generation of an airduct tempering, these measures all effectively reduce the generation of pulverized coal preparation system deflagration accident having.But when in the pulverized coal preparation system when coal dust temperature, oxygen level, coal powder density, fineness of pulverized coal etc. reach certain condition, still might catch fire or explode, cause damage, damage equipment influences boiler safety production.Therefore need design one cover to be specifically designed to the fundamental characteristics that the coal dust detonation was studied and grasped to the device of measuring the coal dust deflagration behavior, significant to the safety in production of power plant.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of coal dust deflagration behavior determinator and assay method are provided, the present invention can measure the deflagration behavior of coal dust fast, and is simple and practical.
Its technical scheme is as follows.
A kind of coal dust deflagration behavior determinator, comprise deflagration tank, high-pressure air source, sensor and data analysis processor, deflagration tank is provided with the coal dust import, coal dust inflow point is provided with powder-storage bin, high-pressure air source communicates with powder-storage bin by high-pressure air pipe, be provided with high-field electrode in deflagration tank, sensor is located on the deflagration tank and with the data analysis processor and is electrically connected.
Further improve and be: the bottom of described deflagration tank is located in described coal dust import, and described deflagration tank base diameter is little, and the bottom diameter that makes progress increases gradually.
Also be provided with vacuum tube on described deflagration tank, this vacuum tube is connected with vacuum pump.
Described high-pressure air source comprises air compressor, gas-holder, and air compressor is communicated with gas-holder, at built in gas tank electric heater, tensimeter and thermometer is arranged, and is provided with high pressure control valve on described high-pressure air pipe.
Described high-field electrode and high-tension ignition generator are electrically connected.
A kind of coal dust deflagration behavior assay method, this method comprises the steps: A, coal dust to be measured is placed in the powder-storage bin; B, unlatching high-pressure air source, under the high pressure gas effect, the uniform disperse of coal dust in the powder-storage bin is in deflagration tank; C, by high-field electrode igniting, make coal dust in deflagration tank, carry out detonation; D, by by sensor measurement deflagration tank internal pressure and variation of temperature, and carry out analyzing and processing by the data analysis processor.
Before described B step, also need deflagration tank is vacuumized processing.
After coal dust enters deflagration tank, delayed time 0.2 second to 0.8 second, light a fire by high-field electrode again.
Description of drawings
Fig. 1 is the structural drawing of the described coal dust detonation of embodiment of the invention device.
Description of reference numerals: 1, deflagration tank, 2, sensor, 3, the data analysis processor, 4, powder-storage bin, 5, high-pressure air pipe, 6, high-field electrode, 7, vacuum tube, 8, vacuum pump, 9, air compressor, 10, gas-holder, 11, electric heater, 12, tensimeter, 13, thermometer, 14, solenoid valve, 15, reverse checkvalve, 16, hand valve, 17, the high-tension ignition generator, 18, vacuum meter.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
As shown in Figure 1, a kind of coal dust deflagration behavior determinator, comprise deflagration tank 1, high-pressure air source, sensor 2 and data analysis processor 3, deflagration tank 1 is provided with the coal dust import, coal dust inflow point is provided with powder-storage bin 4, high-pressure air source communicates with powder-storage bin 4 by high-pressure air pipe 5, is provided with high-field electrode 6 in deflagration tank 1, and sensor 2 is located on the deflagration tank 1 and with data analysis processor 3 and is electrically connected.
Wherein: described data analysis processor 3 is a computing machine, and the bottom of deflagration tank 1 is located in the coal dust import, and deflagration tank 1 base diameter is little, and the bottom diameter that makes progress increases gradually.Also be provided with vacuum tube 7 on deflagration tank 1, this vacuum tube 7 is connected with vacuum pump 8.Described high-pressure air source comprises air compressor 9, gas-holder 10, air compressor 9 is communicated with gas-holder 10, in gas-holder 10, be provided with electric heater 11, tensimeter 12 and thermometer 13, on high-pressure air pipe 5, be provided with high pressure control valve (high pressure control valve comprises solenoid valve 14, reverse checkvalve 15 and hand valve 16).High-field electrode 6 is electrically connected with high-tension ignition generator 17, also is provided with vacuum meter 18 on deflagration tank 1.
The coal dust deflagration behavior assay method that is adopted in the present embodiment comprises the steps: A, 2 to 35 coal dusts to be measured that restrain is placed in the powder-storage bin 4, and regulation voltage is to 17 chargings of high-tension ignition generator; B, unlatching high-pressure air source, under the high pressure gas effect, the uniform disperse of coal dust in the powder-storage bin 4 is in deflagration tank 1; C, by high-field electrode 6 igniting, make coal dust in deflagration tank 1, carry out detonation; D, by measuring deflagration tank 1 internal pressure and variation of temperature by sensor 2, and carry out analyzing and processing by data analysis processor 3.
Before described B step, also need deflagration tank 1 is vacuumized processing, make its pressure control at 5 to 6 kPas, temperature is controlled at 50 to 350 degree.Make compressed-air actuated pressure control in the gas-holder 10 at 200 to 300 kPas, temperature is controlled at 50 to 350 degree.After coal dust enters deflagration tank 1, delayed time 0.2 second to 0.8 second, again by high-field electrode 6 igniting.
After above-mentioned steps was finished, the coal dust that increases and decreases 0.3 gram more successively continued to repeat above-mentioned steps.
Be specific embodiments of the invention only below, do not limit protection scope of the present invention with this; Any replacement and the improvement done on the basis of not violating the present invention's design all belong to protection scope of the present invention.
Claims (8)
1. coal dust deflagration behavior determinator, it is characterized in that, comprise deflagration tank, high-pressure air source, sensor and data analysis processor, deflagration tank is provided with the coal dust import, coal dust inflow point is provided with powder-storage bin, high-pressure air source communicates with powder-storage bin by high-pressure air pipe, is provided with high-field electrode in deflagration tank, and sensor is located on the deflagration tank and with the data analysis processor and is electrically connected.
2. coal dust deflagration behavior determinator according to claim 1 is characterized in that the bottom of described deflagration tank is located in described coal dust import, and described deflagration tank base diameter is little, and the bottom diameter that makes progress increases gradually.
3. coal dust deflagration behavior determinator as claimed in claim 1 or 2 is characterized in that also be provided with vacuum tube on described deflagration tank, this vacuum tube is connected with vacuum pump.
4. coal dust deflagration behavior determinator as claimed in claim 1 or 2, it is characterized in that, described high-pressure air source comprises air compressor, gas-holder, air compressor is communicated with gas-holder, at built in gas tank electric heater, tensimeter and thermometer are arranged, on described high-pressure air pipe, be provided with high pressure control valve.
5. coal dust deflagration behavior determinator as claimed in claim 1 or 2 is characterized in that described high-field electrode and high-tension ignition generator are electrically connected.
6. a coal dust deflagration behavior assay method is characterized in that, this method comprises the steps: A, coal dust to be measured is placed in the powder-storage bin; B, unlatching high-pressure air source, under the high pressure gas effect, the uniform disperse of coal dust in the powder-storage bin is in deflagration tank; C, by high-field electrode igniting, make coal dust in deflagration tank, carry out detonation; D, by sensor measurement deflagration tank internal pressure and variation of temperature, and carry out analyzing and processing by the data analysis processor.
7. as coal dust deflagration behavior determinator as described in the claim 7, it is characterized in that, before described B step, also need vacuumize processing deflagration tank.
8. as coal dust deflagration behavior determinator as described in the claim 7, it is characterized in that, after coal dust enters deflagration tank, delayed time 0.2 second to 0.8 second, light a fire by high-field electrode again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010554692 CN102042941B (en) | 2010-11-23 | 2010-11-23 | Device and method for testing deflagration property of coal powder |
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| CN 201010554692 CN102042941B (en) | 2010-11-23 | 2010-11-23 | Device and method for testing deflagration property of coal powder |
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| CN102042941A true CN102042941A (en) | 2011-05-04 |
| CN102042941B CN102042941B (en) | 2013-01-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954441A (en) * | 2014-04-25 | 2014-07-30 | 武汉工程大学 | Device and method for detecting and testing high-temperature valve based on air heating system |
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| JPH09236559A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Spontaneous combustion testing device |
| CN201397312Y (en) * | 2009-04-17 | 2010-02-03 | 煤炭科学研究总院重庆研究院 | Coal dust explosion digital detecting system |
| CN101650287A (en) * | 2009-05-14 | 2010-02-17 | 西安热工研究院有限公司 | Electrical heating type cylindrical raw coal spontaneous combustion testing device and method |
| CN101650325A (en) * | 2009-05-14 | 2010-02-17 | 西安热工研究院有限公司 | Method for testing pulverized coal explosion with adjustable temperature |
| CN201844988U (en) * | 2010-11-23 | 2011-05-25 | 广东电网公司电力科学研究院 | Deflagration characteristic measuring device of powder coal |
-
2010
- 2010-11-23 CN CN 201010554692 patent/CN102042941B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236559A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Spontaneous combustion testing device |
| CN201397312Y (en) * | 2009-04-17 | 2010-02-03 | 煤炭科学研究总院重庆研究院 | Coal dust explosion digital detecting system |
| CN101650287A (en) * | 2009-05-14 | 2010-02-17 | 西安热工研究院有限公司 | Electrical heating type cylindrical raw coal spontaneous combustion testing device and method |
| CN101650325A (en) * | 2009-05-14 | 2010-02-17 | 西安热工研究院有限公司 | Method for testing pulverized coal explosion with adjustable temperature |
| CN201844988U (en) * | 2010-11-23 | 2011-05-25 | 广东电网公司电力科学研究院 | Deflagration characteristic measuring device of powder coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954441A (en) * | 2014-04-25 | 2014-07-30 | 武汉工程大学 | Device and method for detecting and testing high-temperature valve based on air heating system |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee after: NORTH CHINA ELECTRIC POWER University (BAODING) Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Co.,Ltd. Address before: 510600 No. 73 Meihua Road, Guangzhou, Guangdong, Yuexiu District Co-patentee before: North China Electric Power University (Baoding) Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. |
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Effective date of registration: 20170817 Address after: 510630, No. fifth, No. 146-150, Whampoa Avenue, Tianhe District, Guangdong, Guangzhou Co-patentee after: NORTH CHINA ELECTRIC POWER University (BAODING) Patentee after: GUANGDONG DIANKEYUAN ENERGY TECHNOLOGY Co.,Ltd. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: North China Electric Power University (Baoding) Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Co.,Ltd. |
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Effective date of registration: 20200706 Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee after: NORTH CHINA ELECTRIC POWER University (BAODING) Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Co.,Ltd. Address before: 510630, No. 146-150, No. fifth, Whampoa Avenue, Tianhe District, Guangdong, Guangzhou Co-patentee before: NORTH CHINA ELECTRIC POWER University (BAODING) Patentee before: GUANGDONG DIANKEYUAN ENERGY TECHNOLOGY Co.,Ltd. |
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