阅读说明：本技术 一种煤自热激励超细粉尘闪燃诱导瓦斯爆炸实验装置 (Coal self-heating excitation ultrafine dust flash combustion induced gas explosion experimental device ) 是由 褚廷湘 郑万成 陈月霞 苏媛媛 杨涛 陈鹏 司俊鸿 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种煤自热激励超细粉尘闪燃诱导瓦斯爆炸实验装置,包括试验箱、温度传感器装置、出气装置、进气装置、喷粉装置、加热装置,所述试验箱是长×宽×高为80cm×80cm×80cm的正方体,并且前、后、左、右、上、下由6块尺寸长×宽为80cm×80cm的钢板组成。本发明由多个试验装置组成,能够循环利用,操作方便,结构简单,造价低；与传统方法比较,增加了对煤自热产生的温度能否使超细粉尘闪燃的有效模拟；增加了对超细粉尘闪燃能否引发瓦斯爆炸的有效模拟；能够定量的研究其规律；可按照需要改变几乎所有影响粉尘闪燃以及瓦斯爆炸的参数；流程简单,数据可靠,能广泛应用于各类煤自热与超细粉尘与瓦斯危害的防治理论研究。(The invention discloses a coal self-heating excitation ultra-fine dust flash combustion induced gas explosion experimental device which comprises a test box, a temperature sensor device, an air outlet device, an air inlet device, a powder spraying device and a heating device, wherein the test box is a cube with the length multiplied by the width multiplied by 80cm, and the front part, the rear part, the left part, the right part, the upper part and the lower part are composed of 6 steel plates with the length multiplied by the width multiplied by 80 cm. The invention is composed of a plurality of test devices, can be recycled, and has convenient operation, simple structure and low cost; compared with the traditional method, the method increases the effective simulation of whether the temperature generated by self-heating of the coal can flash the ultrafine dust or not; the effective simulation of whether the flash combustion of the ultrafine dust can cause gas explosion is increased; the rule can be quantitatively researched; almost all parameters affecting dust flash and gas explosion can be changed as required; the method has simple process and reliable data, and can be widely applied to the theoretical research on prevention and treatment of self-heating and ultrafine dust and gas hazards of various coals.)

1. The utility model provides a coal self-heating encourages super fine dust flash induced gas explosion experimental apparatus which characterized in that: the test box comprises a test box (1), a temperature sensor device (2), an air outlet device (3), an air inlet device (4), a powder spraying device (5) and a heating device (6), wherein the test box (1) is a cube with the length, the width and the height of 80cm multiplied by 80cm, the front, the back, the left, the right, the upper and the lower parts of the test box consist of 6 steel plates with the length, the width and the width of 80cm multiplied by 80cm, a spring switch (7) is arranged at the upper part of the test box (1), an explosion venting port (8) and an air outlet (9) are arranged at one side of the test box (1), a gas inlet (10) and a powder spraying port (11) are arranged at the other side of the test box (1), a visible window (12) is arranged at the front end of the test box (1), a heating port (13) and a wire collecting port (14) are arranged at the rear end of the test box (1), an insulating plate (15) is arranged inside the test box (1), and asbestos (16) is arranged between the bottom of the test box (1) and the insulating plate (15) .

2. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the explosion venting port (8) is connected with a pneumatic regulating valve, and when the pressure is overlarge, the pressure valve is opened to release the pressure.

3. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the gas outlet (9) is connected with the gas outlet device (3), and the pipeline of the gas outlet device (3) is connected with the waste collecting device and the gas chromatograph (17).

4. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the pneumatic powder spray gun (18) is inserted into the test box (1), and the lower part of the pneumatic powder spray gun (18) is connected with an air pipe (20), a powder pipe (19) and a cable (21).

5. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the visible window (12) is made of transparent glass fiber reinforced plastics with the thickness of 2cm, and is convenient to be matched with a high-speed camera for use.

6. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: a heating rod (22) is inserted into the test box (1) through the heating port (13), and the length of the heating rod (22) is 75 cm.

7. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the data transmission line is connected with a computer through the wire collecting port (14).

8. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the heat insulation plate (15) is provided with 28 temperature measuring ports and 5 air inlets and is used for stacking coal samples.

9. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the asbestos insulation layer (16) is a cuboid with the length multiplied by the width multiplied by the height multiplied by 80cm multiplied by 20cm, and pipelines of the air inlet device (4) and the temperature sensor device (2) are arranged in the asbestos insulation layer (16).

10. The coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device as claimed in claim 1, wherein: the gas inlet device (4) is composed of 6 valves, 6 gas flow controllers, 1 gas cylinder and a plurality of pipelines, a mesh cover is arranged at a gas inlet of the gas inlet device (4), the temperature sensor device (2) is composed of a temperature sensor (23), a data transmission line and pipelines, wherein the temperature sensor (23) is in a shape of a probe, and the heights of different positions are different.

Technical Field

The invention relates to the technical field of coal engineering, in particular to a coal self-heating excitation ultra-fine dust flash combustion induced gas explosion experimental device.

Background

In recent years, China faces serious resource shortage, and coal is used as an important energy source in China, and plays an extremely important role in the current social and economic development process. According to the energy development planning of China, even in 2050 years, coal still accounts for about 50% of the energy consumption structure of China. In the coal resource mining process, coal spontaneous combustion still remains one of the common disasters in the underground coal mine of China, not only influences the safety production of the mine, but also causes immeasurable economic loss, resource loss and casualties, and can induce gas explosion and coal dust explosion in more serious cases, the loss of the coal is difficult to estimate, some current devices mainly realize the research on the spontaneous combustion ignition process of the coal or the research on the independent gas explosion, the whole process research of inducing gas explosion by coal spontaneous combustion can not be realized, especially before open fire occurs by coal spontaneous combustion, when the experimental research equipment for igniting the gas by the self-heating excitation flash combustion of the coal on the superfine coal dust carried in the air leakage current is lacked, therefore, an experimental device for inducing gas explosion by coal self-heating excitation ultrafine dust flash combustion is urgently needed to eliminate the problems, and further, the whole process test and research on the gas explosion induced by coal self-combustion are realized.

Disclosure of Invention

The invention aims to solve the problems and provide a coal self-heating excitation ultra-fine dust flash combustion induction gas explosion experimental device.

The invention realizes the purpose through the following technical scheme:

a coal self-heating excitation ultrafine dust flash combustion induced gas explosion experimental device comprises a test box, a temperature sensor device, an air outlet device, an air inlet device, a powder spraying device and a heating device, wherein the test box is a cube with the length, the width and the height of 80cm multiplied by 80cm, the front part, the rear part, the left part, the right part, the upper part and the lower part of the test box are composed of 6 steel plates with the length, the width and the width of 80cm multiplied by 80cm, a spring switch is arranged at the upper part of the test box, an explosion venting port and an air outlet are arranged at one side of the test box, a gas inlet and a powder spraying port are arranged at the other side of the test box, a visual window is arranged at the front end of the test box, a heating port and a line collecting port are arranged at the rear end of the test box, a heat insulation plate is arranged inside the test box, and an asbestos insulation layer is arranged between the bottom of the test box and the heat insulation plate.

Preferably: the explosion venting port is connected with a pneumatic regulating valve, and when the pressure is overlarge, the pressure valve is opened to release the pressure.

Preferably: the gas outlet is connected with the gas outlet device, and a pipeline of the gas outlet device is connected with the waste collecting device and the gas chromatograph.

Preferably: and the pneumatic powder gun is inserted into the test box, and the lower part of the pneumatic powder gun is connected with an air pipe, a powder pipe and a cable.

Preferably: the viewing window is made of transparent glass fibre reinforced plastic with a thickness of 2 cm.

Preferably: the heating rod is inserted into the test box through the heating port, and the length of the heating rod is 75 cm.

Preferably: the data transmission line is connected with the computer through the line concentration port.

Preferably: the heat insulation plate is provided with 28 temperature measuring ports and 5 air inlets and is used for stacking coal samples.

Preferably: the asbestos heat insulation layer is a cuboid with the length, the width and the height of 80cm, 80cm and 20cm, and pipelines of the air inlet device and the temperature sensor device are arranged in the asbestos heat insulation layer.

Preferably: the air inlet device is composed of 6 valves, 6 gas flow controllers, 1 gas cylinder and a plurality of pipelines, a mesh enclosure is arranged at an air inlet of the air inlet device, the temperature sensor device is composed of a temperature sensor, a data transmission line and pipelines, wherein the temperature sensor is in the shape of a probe, and the heights of different positions are different.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention is composed of a plurality of test devices, can be recycled, and has convenient operation, simple structure and low cost;

2. compared with the traditional method, the method increases the effective simulation of whether the temperature generated by self-heating (before open fire) of the coal can flash the ultrafine dust or not; the effective simulation of whether the flash combustion of the ultrafine dust can cause gas explosion is increased; the rule can be quantitatively researched through related test schemes and monitoring accessories; parameters related to influencing dust flash combustion and gas explosion can be changed as required; the method has simple flow and reliable data, and can be widely applied to the research on the theory and the technical aspect of the prevention and control of the spontaneous combustion of the mine gas and the coal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of an experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention;

FIG. 2 is a top view and a front view of a thermal insulation plate and a temperature sensor device of the experimental apparatus for coal self-heating excitation ultra-fine dust flash combustion induced gas explosion;

FIG. 3 is a front view of an experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention;

FIG. 4 is a rear view of an experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention;

FIG. 5 is a left side view of an experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention;

FIG. 6 is a right side view of the experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention;

FIG. 7 is a top view of an experimental apparatus for inducing gas explosion by coal self-heating excitation ultra-fine dust flash combustion according to the present invention.

The reference numerals are explained below:

1. a test chamber; 2. a temperature sensor device; 3. an air outlet device; 4. an air intake device; 5. a powder spraying device; 6. a heating device; 7. a spring switch; 8. an explosion venting port; 9. an air outlet; 10. a gas inlet; 11. a powder spraying port; 12. a visible window; 13. a heating port; 14. a wire collecting port; 15. a heat insulating plate; 16. an asbestos insulation layer; 17. a gas chromatograph; 18. a pneumatic powder gun; 19. a powder tube; 20. an air tube; 21. a cable; 22. a heating rod; 23. a temperature sensor.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1-7, a coal self-heating excitation ultra-fine dust flash combustion induced gas explosion experimental device comprises a test box 1, a temperature sensor device 2, an air outlet device 3, an air inlet device 4, a powder spraying device 5 and a heating device 6, wherein the test box 1 is a cube with the length multiplied by the width multiplied by the height of 80cm multiplied by 80cm, and preceding, back, left and right, up, down by 6 sizes length x wide for 80cm x 80 cm's steel sheet composition, there is spring switch 7 on proof box 1 upper portion, 1 one side of proof box has let out and explodes mouth 8 and gas outlet 9, 1 opposite side of proof box is provided with gas air inlet 10 and the mouth 11 of dusting, 1 front end of proof box is provided with visual window 12, 1 rear end of proof box is provided with heating mouth 13 and collection line mouth 14, 1 inside insulation panels 15 that is provided with of proof box, and be provided with asbestos heat preservation 16 between 1 bottom of proof box and insulation panels 15.

Preferably: the explosion venting port 8 is connected with a pneumatic regulating valve, and when the pressure is overlarge, the pressure valve is opened to release the pressure; the gas outlet 9 is connected with the gas outlet device 3, and the pipeline of the gas outlet device 3 is connected with the waste collecting device and the gas chromatograph 17; the pneumatic powder gun 18 is inserted into the test box 1, and the lower part of the pneumatic powder gun 18 is connected with an air pipe 20, a powder pipe 19 and a cable 21; the visible window 12 is made of transparent glass fiber reinforced plastic with a thickness of 2 cm; the heating rod 22 is inserted into the test chamber 1 through the heating port 13, and the length of the heating rod 22 is 75 cm; the data transmission line is connected with a computer through a line concentration port 14; the heat insulation plate 15 is provided with 28 temperature measuring ports and 5 air inlets and is used for stacking coal samples; the asbestos insulation layer 16 is a cuboid with the length multiplied by the width multiplied by the height multiplied by 80cm multiplied by 20cm, and pipelines of the air inlet device 4 and the temperature sensor device 2 are arranged in the asbestos insulation layer 16; the air inlet device 4 is composed of 6 valves, 6 gas flow controllers, 1 gas cylinder and a plurality of pipelines, a mesh cover is arranged at an air inlet of the air inlet device 4, the temperature sensor device 2 is composed of a temperature sensor 23, a data transmission line and pipelines, wherein the temperature sensor 23 is shaped like a probe, and the heights of different positions are different.

The working principle and the using method of the invention are as follows:

1, designing a test scheme: selecting test variables, test times and test schemes as required, wherein the test schemes can select orthogonal tests and uniform tests, and the test variables can select temperature, dust granularity, dust amount, gas concentration, gas amount and the like;

2, mixing the required coal sample according to the test scheme, fully and uniformly mixing and measuring parameters such as porosity, density, water content and the like;

3, setting the temperature programming chamber to the required temperature and keeping the temperature constant, and placing the matched coal sample on the heat insulation plate 15;

4, the coal sample is self-heated in the chamber, and the center of the coal sample is heated by the heating rod 22;

5, introducing superfine dust into the powder spraying port 11, heating by using a heating rod 22 all the time, continuing for a period of time, observing the temperature for flashing the dust, introducing gas during flashing the dust, and observing whether the gas can explode or not;

6, after the experiment is finished, the data are arranged and the instrument is cleaned;

7, data analysis: and analyzing the relationship among the temperature, the dust granularity, the dust amount, the gas concentration and the gas amount by adopting multivariate linear regression.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.