CN201589761U - Coal spontaneous combustion simulator based on program temperature control - Google Patents
Coal spontaneous combustion simulator based on program temperature control Download PDFInfo
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- CN201589761U CN201589761U CN2009202883367U CN200920288336U CN201589761U CN 201589761 U CN201589761 U CN 201589761U CN 2009202883367 U CN2009202883367 U CN 2009202883367U CN 200920288336 U CN200920288336 U CN 200920288336U CN 201589761 U CN201589761 U CN 201589761U
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Abstract
The utility model provides a coal spontaneous combustion simulator based on program temperature control and relates to a device used for coal detection device, wherein a stainless steel plate (3), an electrical heating tape (4), an heat insulation material layer (5) and a packaging iron sheet (6) that are sequentially arranged between the inner wall surface and the outer wall surface of a reaction barrel (1) from inside to outside; the bottom of the reaction barrel (1) is provided with a coal tray (7); an air inlet pipe (8) penetrates through the wall surfaces of the reaction barrel (1) and then stretches into a bottom air buffer layer; an air outlet pipe (9) is led out from an upper air buffer layer (11); a thermocouple temperature probe (12) is distributed in the inner cavity of the reaction barrel (1) between the inner wall surface and the outer wall surface; and the inner cavity of the reaction barrel (1) is distributed with air sampling points (15) and an SF6 air injection point (16). The device can realize the coal spontaneous combustion process under the two experiment conditions of heat-insulation oxidation and accelerated oxidation respectively by adopting the program temperature control method and can more accurately measure the low-temperature oxidation characteristic of the coal.
Description
Technical field
The utility model relates to the device that a kind of coal detects usefulness, particularly relates to a kind of coal spontaneous combustion analogue means based on temperature programmed control.
Background technology
Spontaneous combustion of coal is one of main reason of coal-mine fire.According to statistics, the mine that has spontaneous fire danger in China state-owned emphasis colliery accounts for 51.3%, accounts for more than 90% of total mine fire.Spontaneous combustion of coal has caused serious coal resources waste, and is threatening the personal safety of underground operators.In order to propose practicable countermeasure measure can for on-the-spot fire preventing and controlling, must study mechanism and macroscopic property that coal spontaneous is got angry.
The heat that discharges in the low-temperature oxidation of coal process is little, speed is slow, and this studies the difficulty of bringing any to carrying out coal spontaneous ignition oxidation temperature-raising characteristic.Large-scale simulated experiment can be reacted the actual conditions that coal spontaneous is got angry comparatively really, but because its coal sample amount that needs is big especially, test period long (often all at tens of days or more than the several months), workload is big, the expense height, the shortcoming of poor repeatability has caused the limitation of applying.Small-sized simulated experiment speed is fast, cost is low, characteristics such as easy control, be subjected to some colleagues' favor, but since small-sized simulation test coal sample amount only tens of between hundreds of grams, this and actual field coal spontaneous ignition situation differ greatly, and are difficult to coal spontaneous ignition situation under the on-the-spot physical condition of real simulation.Based on this, it is moderate to research and develop a kind of coal sample amount, is applicable to that the experimental provision of laboratory fast measuring oxidation of coal characteristic is extremely urgent.
Summary of the invention
The purpose of this utility model is to provide a kind of coal spontaneous combustion analogue means based on temperature programmed control, the temperature programmed control method of utilizing this device realizes that respectively adiabatic oxidation and two kinds of experiment conditions of accelerated oxidation come the spontaneous combustion of simulated coal process, the simulation that can experimentize to the overall process of coal spontaneous combustion realizes the fast measuring of various internal and external factors to the spontaneous combustion period of coal spontaneous combustion influence and coal.
The purpose of this utility model is achieved through the following technical solutions:
A kind of coal spontaneous combustion analogue means based on temperature programmed control, include reaction tube and cover, be followed successively by corrosion resistant plate from inside to outside between the inside and outside wall of its described reaction tube, heat tape, heat-insulating material layer and packing iron sheet, reaction tube internal face corrosion resistant plate is made screw-like, the reaction tube bottom is provided with holds the coal pallet, the wall that draft tube is passed reaction tube stretches in the gas buffer layer of bottom, escape pipe is drawn from the upper gas cushion, be distributed with thermocouple temperature probe between reaction tube inner chamber and the inside and outside wall, the lead of the thermocouple temperature probe of reaction tube inner chamber passes from the reaction tube top, the lead of the thermocouple temperature probe between the inside and outside wall of reaction tube passes in the middle of reaction tube, the reaction tube inner chamber is distributed with gas sample point and SF6 gas decanting point, and gas sample tube stretches out from upper gas cushion wall and reaction tube top respectively.
Be connected by bolt through flange between the aforesaid a kind of coal spontaneous combustion analogue means, its reaction tube and cover based on temperature programmed control.
Aforesaid a kind of coal spontaneous combustion analogue means based on temperature programmed control, the thermocouple temperature probe of its reaction tube inner chamber and gas sample tube are through the brandreth overall fixed.
Advantage of the present utility model and effect are:
1, utilize the temperature programmed control method to realize that respectively adiabatic oxidation and two kinds of experiment conditions of accelerated oxidation come the spontaneous combustion of simulated coal process;
When 2, simulating coal thermal insulation oxidizing process, the temperature programmed control wall is set at the temperature tracking control, the temperature difference according to inside and outside wall, by the time adjust the heat that adds that heat tape provides, guarantee the continuity of concurrent heating, add the thermal insulating warm-keeping layer in the outside, guaranteed that the compound heat of coal oxygen does not does not scatter and disappear, well accomplished the thermal insulation to the coal sample environment, the oxidation of coal thermal discharge is to cause the unique thermal source of coal spontaneous combustion;
When 3, simulating coal accelerated oxidation process, the temperature programmed control wall is set at constant heating control mode, heat tape provides the constant heat that adds that coal body is heated, what be that oxidation of coal thermal discharge and heat tape provide at this moment constantly adds the heat acting in conjunction and causes the coal sample temperature to raise, quicken the coal spontaneous combustion process, shorten the test duration;
4, reaction tube wall, temperature and gas detecting system adopt exotic material, and testing the highest bearing temperature is 200 ℃, and simulation can experimentize to the overall process of coal spontaneous combustion;
5, guarantee temperature, the gas detecting system of degree of precision, can determine the distribution situation of coal body temperature field and gas concentration field more exactly.
Description of drawings
Accompanying drawing of the present utility model is the one-piece construction synoptic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
The utility model builds that coal capacity is moderate can the coal spontaneous combustion process of approximate simulation under leakage intensity, float coal thickness and the accumulation of heat condition of actual coal yard, can reflect coal spontaneous combustion process temperature field and index gas density field distribution situation, realize that test period is short, testing cost is low.
Coal spontaneous combustion analogue means based on temperature programmed control of the present utility model, be followed successively by corrosion resistant plate from inside to outside between the inside and outside wall of reaction tube, heat tape, heat-insulating material layer and packing iron sheet, reaction tube internal face corrosion resistant plate is made screw-like, the coal pallet is held in the bottom, draft tube stretches in the gas buffer layer of bottom, escape pipe is drawn from the upper gas cushion, be distributed with thermocouple temperature probe between reaction tube inner chamber and the inside and outside wall, the lead of the thermocouple temperature probe of inner chamber passes from the tube top, the lead of the thermocouple temperature probe between the inside and outside wall passes in the middle of cylindrical shell, the reaction tube inner chamber is distributed with the gas sample point, and gas sample tube stretches out from the wall and the tube top of upper gas cushion respectively.
As shown in the figure, coal spontaneous combustion analogue means based on temperature programmed control described in the utility model, be followed successively by corrosion resistant plate 3 from inside to outside between the reaction tube 1 inside and outside wall, heat tape 4, (heating power is that 0W-4200W is adjustable), heat-insulating material layer 5 (material is the alumina silicate warming plate of thick 0.1m) and packing iron sheet 6.Reaction tube 1 internal face corrosion resistant plate 3 is made screw-like, avoided too much gas to pass through reaction tube along internal face, coal pallet 7 is held in reaction tube 1 bottom, the wall that draft tube 8 is passed reaction tube 1 stretches in the bottom gas buffer layer 10, escape pipe 9 upper gas cushions 11 are drawn, be distributed with thermocouple temperature probe 12 between reaction tube 1 inner chamber and the inside and outside wall, the lead of the thermocouple temperature probe of inner chamber passes from reaction tube top 13, the lead of the thermocouple temperature probe between the inside and outside wall passes from reaction tube 1 middle part 14, reaction tube 1 inner chamber is distributed with gas sample point 15 and SF6 gas decanting point 16, and gas sample tube 17 stretches out from upper gas cushion 11 walls and reaction tube 1 top respectively.Be connected by bolt 18 through flange between reaction tube 1 and the cover 2.The thermocouple temperature probe 12 of reaction tube 1 inner chamber and gas sample tube 17 are through brandreth 19 overall fixed.
Utilize this device to carry out the coal spontaneous combustion simulation process to be: before the experiment beginning, need base measuring temperature and gas detection equipment, coal sample is added in the reaction tube 1 gradually, install the tight cover 2 of coal sample bonnet, draft tube 8 inserted air and gas flow and initial temperature are adjusted to the value of setting, heat tape 4 provides firm power that coal body is heated, start-up temperature control and detection system, the temperature and the gas concentration of reaction tube 1 inner chamber each point coal sample all can change in time, real-time continuous is followed the tracks of each point temperature variation in the stove, per ten minutes good all data of record of computing machine are so that analyze, owing to adopt external heat source that coal body is heated, quicken the coal spontaneous combustion process, shorten the test duration.
Claims (3)
1. coal spontaneous combustion analogue means based on temperature programmed control, include reaction tube and cover, it is characterized in that: be followed successively by corrosion resistant plate (3) from inside to outside between the inside and outside wall of described reaction tube (1), heat tape (4), heat-insulating material layer (5) and packing iron sheet (6), reaction tube (1) internal face corrosion resistant plate (3) is made screw-like, reaction tube (1) bottom is provided with holds coal pallet (7), the wall that draft tube (8) is passed reaction tube (1) stretches in the bottom gas buffer layer (10), escape pipe (9) is drawn from upper gas cushion (11), be distributed with thermocouple temperature probe (12) between reaction tube (1) inner chamber and the inside and outside wall, the lead of the thermocouple temperature probe of reaction tube (1) inner chamber passes from reaction tube top (13), and the lead of the thermocouple temperature probe between the inside and outside wall of reaction tube (1) is from the reaction tube middle part
(14) locate to pass, reaction tube (1) inner chamber is distributed with gas sample point (15) and SF6 gas decanting point (16), and gas sample tube (17) stretches out from upper gas cushion (10) wall and reaction tube (1) top respectively.
2. a kind of coal spontaneous combustion analogue means based on temperature programmed control according to claim 1 is characterized in that: be connected by bolt (18) through flange between reaction tube (1) and the cover (2).
3. a kind of coal spontaneous combustion analogue means based on temperature programmed control according to claim 1 is characterized in that: the thermocouple temperature probe (12) of reaction tube (1) inner chamber and gas sample tube (17) are through brandreth (19) overall fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202883367U CN201589761U (en) | 2009-12-23 | 2009-12-23 | Coal spontaneous combustion simulator based on program temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202883367U CN201589761U (en) | 2009-12-23 | 2009-12-23 | Coal spontaneous combustion simulator based on program temperature control |
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| CN201589761U true CN201589761U (en) | 2010-09-22 |
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| CN2009202883367U Expired - Fee Related CN201589761U (en) | 2009-12-23 | 2009-12-23 | Coal spontaneous combustion simulator based on program temperature control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353763A (en) * | 2011-09-14 | 2012-02-15 | 北京科技大学 | Small simulation device for testing spontaneous combustion period of coal |
| CN106501310A (en) * | 2016-10-25 | 2017-03-15 | 中国矿业大学(北京) | Based on the oxidization of remained coal intensification simulation experiment method that goaf air parameter is surveyed |
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN113960243A (en) * | 2021-11-02 | 2022-01-21 | 宁波工程学院 | Control experiment system and method for rapidly determining adiabatic natural ignition period of coal |
-
2009
- 2009-12-23 CN CN2009202883367U patent/CN201589761U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353763A (en) * | 2011-09-14 | 2012-02-15 | 北京科技大学 | Small simulation device for testing spontaneous combustion period of coal |
| CN102353763B (en) * | 2011-09-14 | 2014-05-28 | 北京科技大学 | Small simulation device for testing spontaneous combustion period of coal |
| CN106501310A (en) * | 2016-10-25 | 2017-03-15 | 中国矿业大学(北京) | Based on the oxidization of remained coal intensification simulation experiment method that goaf air parameter is surveyed |
| CN106501310B (en) * | 2016-10-25 | 2019-02-12 | 中国矿业大学(北京) | Oxidization of remained coal heating simulation experiment method based on the actual measurement of goaf air parameter |
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN113960243A (en) * | 2021-11-02 | 2022-01-21 | 宁波工程学院 | Control experiment system and method for rapidly determining adiabatic natural ignition period of coal |
| CN113960243B (en) * | 2021-11-02 | 2023-07-07 | 宁波工程学院 | Control experiment system and method for rapidly determining adiabatic natural ignition period of coal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20111223 |