CN201844988U - Deflagration characteristic measuring device of powder coal - Google Patents
Deflagration characteristic measuring device of powder coal Download PDFInfo
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- CN201844988U CN201844988U CN2010206193306U CN201020619330U CN201844988U CN 201844988 U CN201844988 U CN 201844988U CN 2010206193306 U CN2010206193306 U CN 2010206193306U CN 201020619330 U CN201020619330 U CN 201020619330U CN 201844988 U CN201844988 U CN 201844988U
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- deflagration
- coal dust
- tank
- pressure air
- powder
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Abstract
The utility model discloses a deflagration characteristic measuring device of powder coal, which comprises a deflagration tank, a high pressure air source, a sensor and a data analyzing and processing device. The deflagration tank is provided with a powder coal inlet and a powder storage bin is arranged at the powder coal inlet. The high pressure air source is communicated with the powder storage bin through a high pressure air tube. A high voltage electrode is arranged in the deflagration tank. The sensor is arranged on the deflagration tank and is electrically connected with the data analyzing and processing device. The utility model can quickly measure the deflagration characteristic of the powder coal and is simple and practical.
Description
Technical field
The utility model relates to a kind of coal dust deflagration behavior determinator.
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 purpose of this utility model is to overcome the defective of prior art, and a kind of coal dust deflagration behavior determinator is provided, and the utility model can be measured 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.
The assay method that aforementioned coal dust deflagration behavior determinator is adopted 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 the utility model embodiment 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 embodiment of the present utility model is 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.
Only be specific embodiment of the utility model below, do not limit protection domain of the present utility model with this; Any replacement and the improvement done on the basis of not violating the utility model design all belong to protection domain of the present utility model.
Claims (5)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206193306U CN201844988U (en) | 2010-11-23 | 2010-11-23 | Deflagration characteristic measuring device of powder coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206193306U CN201844988U (en) | 2010-11-23 | 2010-11-23 | Deflagration characteristic measuring device of powder coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201844988U true CN201844988U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206193306U Expired - Lifetime CN201844988U (en) | 2010-11-23 | 2010-11-23 | Deflagration characteristic measuring device of powder coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201844988U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042941A (en) * | 2010-11-23 | 2011-05-04 | 广东电网公司电力科学研究院 | Device and method for testing deflagration property of coal powder |
| CN103743781A (en) * | 2013-09-17 | 2014-04-23 | 中国神华能源股份有限公司 | Method for calculating explosion lower-limit heat concentration of coal dust |
-
2010
- 2010-11-23 CN CN2010206193306U patent/CN201844988U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042941A (en) * | 2010-11-23 | 2011-05-04 | 广东电网公司电力科学研究院 | Device and method for testing deflagration property of coal powder |
| CN102042941B (en) * | 2010-11-23 | 2013-01-09 | 广东电网公司电力科学研究院 | Device and method for testing deflagration property of coal powder |
| CN103743781A (en) * | 2013-09-17 | 2014-04-23 | 中国神华能源股份有限公司 | Method for calculating explosion lower-limit heat concentration of coal dust |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110525 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |