阅读说明：本技术 一种敞开式厢体煤自燃检测装置及其检测方法 (Open type carriage coal spontaneous combustion detection device and detection method thereof ) 是由 张嬿妮 舒盼 刘雪梦 段正肖 张陆陆 王伟峰 于 2021-10-29 设计创作，主要内容包括：本发明公开了一种敞开式厢体煤自燃检测装置及其检测方法,包括数据分析单元、温度控制单元和用于放置煤样的炉体,所述温度控制单元包括温度控制器以及设置在煤样中的若干加热棒和若干热电偶,若干所述加热棒和热电偶均分层布置在所述煤样中,每层所述热电偶和所述加热棒交替布置,所述温度控制器用于控制每层所述加热棒的温度,所述数据分析单元用于分析每层所述热电偶的信号后整合并得出整个煤样的温度场,进而通过所述加热棒的温度变化得出所述温度场的变化规律；本发明通过将加热棒和热电偶分层布置在整个煤样中,并通过温度控制单元完成对整个煤样内温度场的测量,进而通过对加热棒温度的改变,得出整个煤样内温度场的变化规律。(The invention discloses an open type compartment coal spontaneous combustion detection device and a detection method thereof, and the detection device comprises a data analysis unit, a temperature control unit and a furnace body for placing a coal sample, wherein the temperature control unit comprises a temperature controller, a plurality of heating rods and a plurality of thermocouples, the heating rods and the thermocouples are arranged in the coal sample in a layered mode, each layer of the thermocouples and the heating rods are alternately arranged, the temperature controller is used for controlling the temperature of each layer of the heating rods, the data analysis unit is used for analyzing signals of each layer of the thermocouples and then integrating the signals to obtain a temperature field of the whole coal sample, and further obtaining a change rule of the temperature field through the temperature change of the heating rods; according to the invention, the heating rods and the thermocouples are arranged in the whole coal sample in a layered manner, the temperature control unit is used for measuring the temperature field in the whole coal sample, and the change rule of the temperature field in the whole coal sample is obtained by changing the temperature of the heating rods.)

1. The coal spontaneous combustion detection device is characterized by comprising a data analysis unit, a temperature control unit and a furnace body used for placing a coal sample, wherein the temperature control unit comprises a temperature controller, a plurality of heating rods and a plurality of thermocouples, the heating rods and the thermocouples are arranged in the coal sample in a layered mode, the thermocouples and the heating rods are arranged in each layer in an alternating mode, the temperature controller is used for controlling the temperature of the heating rods in each layer, the data analysis unit is used for analyzing signals of the thermocouples in each layer and then integrating the signals to obtain a temperature field of the whole coal sample, and then the change rule of the temperature field is obtained through the temperature change of the heating rods.

2. The open type compartment coal spontaneous combustion detection device according to claim 1, further comprising a gas collection unit, wherein the gas collection unit comprises a gas extraction pipeline arranged in a coal sample, and a gas pump, a gas absorption cell and a gas detector which are arranged outside the furnace body, one end of the gas extraction pipeline extends upwards to form the coal sample, the other end of the gas extraction pipeline extends downwards to form the furnace body and is connected with one end of the gas pump, the other end of the gas pump is connected with one end of the gas absorption cell, the other end of the gas absorption cell is connected with one end of the gas detector, the other end of the gas detector is connected with the data analysis unit, and the data analysis unit is used for analyzing the change rule of the gas field.

3. The open-type carriage coal spontaneous combustion detection device as claimed in claim 1, wherein the temperature control unit further comprises an instrument display panel, the thermocouples are respectively connected with the instrument display panel, and the instrument display panel and the temperature controller are both connected with the data analysis unit.

4. The open type carriage body coal spontaneous combustion detection device as claimed in claim 1, further comprising an air flow adjusting unit arranged on the furnace body, wherein the air flow adjusting unit comprises an air conveying pipeline, an air inlet pipeline, an air outlet pipeline and an air pressure control reversing valve, the air inlet pipeline, the air outlet pipeline and the air pressure control reversing valve are arranged on the air conveying pipeline, the air conveying pipeline is arranged above the coal sample in the furnace body, the air outlet pipeline is located below the plane of the air conveying pipeline, and the air pressure control reversing valve is arranged at the outlet end of the air outlet pipeline.

5. The open-type carriage coal spontaneous combustion detection device as claimed in claim 1, wherein a plurality of heating rods and thermocouples are uniformly arranged in a coal sample in a layered manner, and each layer of thermocouple is arranged above the heating rod of the adjacent layer.

6. The open-type carriage coal spontaneous combustion detection device as claimed in claim 1, wherein a partition plate is arranged between two adjacent layers of heating rods at the uppermost part of the coal sample.

7. The open-type carriage coal spontaneous combustion detection device as claimed in claim 2, wherein the gas detector is a thermal conductivity gas analyzer.

8. The open type carriage coal spontaneous combustion detection device as claimed in claim 7, wherein the gas absorption cell comprises a spectrometer, a cell body provided with a gas inlet, a gas outlet and a light transmission window, a plane reflector and a concave reflector arranged on the inner wall of the cell body, and a heating belt arranged in the cell body, and the spectrometer is used for receiving light rays passing through gas in the cell body.

9. The open type carriage coal spontaneous combustion detection device as claimed in claim 8, wherein a shockproof base is arranged at the bottom of the tank body.

10. An open carriage coal spontaneous combustion detection method is characterized by comprising the following steps:

opening the temperature controller to heat the heating rod, analyzing a signal of a thermocouple through a data analysis system and obtaining a corresponding temperature field of the whole coal sample;

starting the gas collector, measuring the gas components and concentration generated by the combustion of the coal sample, and obtaining a corresponding gas field through a data analysis unit;

and adjusting the temperature change of the heating rod, measuring the data of the temperature field and the gas field at corresponding temperatures, and comparing and analyzing the data of the temperature field and the gas field measured when the heating rod is at different temperatures to obtain the change rule of the temperature field and the gas field of the coal sample in the whole furnace body.

Technical Field

The invention relates to the technical field of coal spontaneous combustion experimental devices, in particular to an open carriage coal spontaneous combustion detection device and a detection method thereof.

Background

Coal has been used as an important component of energy economy in China and is also an important material for railway transportation. At present, china is the largest coal producing country in the world and is also the largest exporting country and consuming country, and coal as a main energy source does not change for a considerable period of time. Furthermore, coal fires not only waste valuable coal resources, but also cause a number of problems and risks worldwide.

Due to the insufficient scientific and technological level of China, the phenomenon of spontaneous combustion of coal in the transportation process is more common. The normal order of the railway in the transportation process is influenced, economic loss is brought to human beings, and even the life safety of people is endangered. With the problem becoming more serious, the cause of coal spontaneous combustion in the railway transportation process is explored, and the determination of the spontaneous combustion property of the coal is the premise for solving the problem.

Most of the existing experimental box body devices and experimental research methods mainly focus on exploring the change of the coal body temperature and the change rule of gas generation when the coal sample is heated at the bottom. The changes of the temperature field and the gas field of the local or integral coal sample in the whole carriage body after the spontaneous combustion phenomenon occurs can not be really and effectively detected; for example, in the device and method for detecting the influence of the spontaneous combustion heat and gas production characteristics of the coal on the gas concentration field, which are disclosed in publication No. CN111650242A, the heating device is arranged at the bottom of the coal sample for heating, and only the heating process with the temperature from bottom to top can be simulated, and the influence of the coal sample on the temperature of the whole coal sample in the combustion process cannot be truly simulated, so that the above problems also exist in the experimental test device and the experimental test method for the spontaneous combustion oxygen concentration of the coal, which are disclosed in publication No. CN 108931499A.

In order to solve the problems, the invention provides an open chamber coal spontaneous combustion detection device and a detection method thereof, which are used for solving the problem that the change rule of the temperature field of the whole coal sample under the spontaneous combustion condition of a coal body cannot be truly and accurately simulated.

Disclosure of Invention

The invention aims to provide an open chamber coal spontaneous combustion detection device and a detection method thereof, and the purpose of truly and accurately simulating the change rule of the temperature field of the whole coal sample under the spontaneous combustion condition of a coal body is achieved.

In order to achieve the purpose, the invention provides the following scheme:

the temperature control unit comprises a temperature controller, a plurality of heating rods and a plurality of thermocouples, the heating rods and the thermocouples are arranged in the coal sample in a layered mode, each layer of the thermocouples and the heating rods are arranged alternately, the temperature controller is used for controlling the temperature of each layer of the heating rods, the data analysis unit is used for analyzing signals of each layer of the thermocouples and then integrating the signals to obtain a temperature field of the whole coal sample, and then the change rule of the temperature field is obtained through the temperature change of the heating rods.

Preferably, the coal gas analyzer further comprises a gas collection unit, wherein the gas collection unit comprises a gas extraction pipeline arranged in the coal sample, and a gas pump, a gas absorption cell and a gas detector which are arranged outside the furnace body, one end of the gas extraction pipeline extends upwards out of the coal sample, the other end of the gas extraction pipeline extends downwards out of the furnace body and is connected with one end of the gas pump, the other end of the gas pump is connected with one end of the gas absorption cell, the other end of the gas absorption cell is connected with one end of the gas detector, the other end of the gas detector is connected with the data analysis unit, and the data analysis unit is used for analyzing the change rule of the gas field.

Preferably, the temperature control unit further comprises an instrument display panel, the thermocouples are respectively connected with the instrument display panel, and the instrument display panel and the temperature controller are both connected with the data analysis unit.

Preferably, the coal sample furnace further comprises an air flow adjusting unit arranged on the furnace body, wherein the air flow adjusting unit comprises an air conveying pipeline, an air inlet pipeline, an air outlet pipeline and an air pressure control reversing valve, the air inlet pipeline, the air outlet pipeline and the air pressure control reversing valve are arranged on the air conveying pipeline, the air conveying pipeline is arranged above the coal sample in the furnace body, the air outlet pipeline is located below the plane where the air conveying pipeline is located, and the air pressure control reversing valve is arranged at the outlet end of the air outlet pipeline.

Preferably, a plurality of heating rods and thermocouples are uniformly arranged in a coal sample in a layered mode, and each layer of thermocouple is arranged above the heating rod of the adjacent layer.

Preferably, a partition plate is arranged between two adjacent layers of heating rods at the uppermost part of the coal sample.

The gas detector is a thermal conductivity gas analyzer.

Preferably, the gas absorption cell includes the spectrum appearance, sets up air inlet, gas outlet and light-transmitting window's cell body, sets up planar mirror and concave surface reflecting mirror and setting on the cell body inner wall are in heating zone in the cell body, the spectrum appearance is used for receiving the light through gaseous in the cell body.

Preferably, the bottom of the tank body is provided with a shockproof base.

An open carriage coal spontaneous combustion detection method comprises the following steps:

opening the temperature controller to heat the heating rod, analyzing a signal of a thermocouple through a data analysis system and obtaining a corresponding temperature field of the whole coal sample;

starting the gas collector, measuring the gas components and concentration generated by the combustion of the coal sample, and obtaining a corresponding gas field through a data analysis unit;

and adjusting the temperature change of the heating rod, measuring the data of the temperature field and the gas field at corresponding temperatures, and comparing and analyzing the data of the temperature field and the gas field measured when the heating rod is at different temperatures to obtain the change rule of the temperature field and the gas field of the coal sample in the whole furnace body.

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

1. according to the invention, the heating rods and the thermocouples are arranged in the whole coal sample in a layered manner, the temperature control unit is used for measuring the temperature field in the whole coal sample, and the change rule of the temperature field in the whole coal sample is obtained by changing the temperature of the heating rods.

2. The coal gas sampling device also comprises a gas acquisition unit, wherein the gas acquisition unit comprises an air pumping pipeline arranged in the coal sample, and an air pump, an air absorption pool and a gas detector which are arranged outside the furnace body, one end of the air pumping pipeline extends upwards out of the coal sample, the other end of the air pumping pipeline extends downwards out of the furnace body and is connected with one end of the air pump, the other end of the air pump is connected with one end of the air absorption pool, the other end of the air absorption pool is connected with one end of the gas detector, the other end of the gas detector is connected with a data analysis unit, and the data analysis unit is used for analyzing the change rule of a gas field.

3. The coal sample self-ignition device also comprises an air flow adjusting unit arranged on the furnace body, wherein the air flow adjusting unit comprises an air conveying pipeline, an air inlet pipeline, an air outlet pipeline and an air pressure control reversing valve, the air inlet pipeline, the air outlet pipeline and the air pressure control reversing valve are arranged on the air conveying pipeline, the air conveying pipeline is arranged above a coal sample in the furnace body, the air outlet pipeline is positioned below the plane of the air conveying pipeline, the air pressure control reversing valve is arranged at the outlet end of the air outlet pipeline, the self-ignition condition of the coal sample in the open compartment body is truly simulated through the control of the wind direction, and the change rule of a temperature field and a gas field of the coal sample under the action of wind power is further simulated and detected.

4. According to the invention, the heating rods and the thermocouples are uniformly arranged in the coal sample in a layered manner, each layer of thermocouple is arranged above the heating rod of the adjacent layer, and the uniformly arranged thermocouples and heating rods enable the temperature measurement of the whole coal sample to be more comprehensive.

Drawings

In order to more clearly illustrate the present invention or technical solutions in the prior art, the drawings needed to be used in the embodiments 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 it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the furnace body and the compartment body;

FIG. 3 is a schematic view of a gas absorption cell structure;

wherein, 1, a carriage body; 2. a furnace body; 3. an air inlet pipeline; 4. a wind delivery pipeline; 5. a pneumatic control directional valve; 6. a thermocouple; 7. a partition plate; 8. a heating rod; 9. an air extraction pipeline; 10. an air pump; 11. a gas absorption cell; 12. a gas detector; 13. an instrument display panel; 14. a temperature controller; 15. a data analysis system; 16. a plane mirror; 17. a concave reflector; 18. a gas absorption cell; 19. heating the tape; 20. a window piece; 21. an inlet and an outlet; 22. shockproof base.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an open chamber coal spontaneous combustion detection device and a detection method thereof, and the purpose of truly and accurately simulating the change rule of the temperature field of the whole coal sample under the spontaneous combustion condition of a coal body is achieved.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1, an open type compartment coal spontaneous combustion detection device comprises a data analysis unit, a temperature control unit and a furnace body 2 for placing a coal sample, wherein the temperature control unit comprises a temperature controller 14, a plurality of heating rods 8 and a plurality of thermocouples 6 which are arranged in the coal sample, the plurality of heating rods 8 and the thermocouples 6 are all arranged in the coal sample in a layered mode, each layer of thermocouple 6 and each layer of heating rod 8 are alternately arranged, the temperature controller 14 is used for controlling the temperature of each layer of heating rod 8, the data analysis unit is used for analyzing signals of each layer of thermocouple 6, integrating the signals and obtaining a temperature field of the whole coal sample, and then obtaining a change rule of the temperature field through the temperature change of the heating rods 8; according to the invention, the heating rod 8 and the thermocouple 6 are arranged in the whole coal sample in a layered manner, the temperature control unit is used for measuring the temperature field in the whole coal sample, and the change rule of the temperature field in the whole coal sample is obtained by changing the temperature of the heating rod 8; further, a train carriage body 1 is arranged outside the furnace body 2, and the design is carried out according to the open carriage body 1 used in railway transportation, so that the temperature field of the coal sample in the train carriage body 1 and the advocated change rule thereof in the transportation process can be simulated more truly.

Referring to fig. 1, the coal gas field monitoring device further comprises a gas collection unit, the gas collection unit comprises a gas extraction pipeline 9 arranged in the coal sample and a gas pump 10 arranged outside the furnace body 2, a gas absorption cell 11 and a gas detector 12, the coal sample extends upwards from one end of the gas extraction pipeline 9, the furnace body 2 extends downwards from the other end of the gas extraction pipeline and is connected with one end of the gas pump 10, the other end of the gas pump 10 is connected with one end of the gas absorption cell 11, the other end of the gas absorption cell 11 is connected with one end of the gas detector 12, the other end of the gas detector 12 is connected with a data analysis unit, and the data analysis unit is used for analyzing the change rule of the gas field.

Referring to fig. 1, the temperature control unit further includes an instrument display panel 13, the thermocouples 6 are respectively connected to the instrument display panel 13, and both the instrument display panel 13 and the temperature controller 14 are connected to the data analysis unit.

Referring to fig. 1, the coal mine underground coal.

Referring to fig. 1 to 2, a plurality of heating rods 8 and thermocouples 6 are uniformly arranged in a coal sample in a layered manner, each layer of thermocouple 6 is arranged above the heating rod 8 of the adjacent layer, and the uniformly arranged thermocouples 6 and heating rods 8 make the temperature measurement of the whole coal sample more comprehensive.

Referring to fig. 1, a partition plate 7 is arranged between two adjacent layers of heating rods 8 at the top of the coal sample; can be divided into top coal sample and lower floor's coal sample through setting up baffle 7, can analyze the temperature field of top coal sample and the temperature variation in gas field alone in the process of heating to top coal sample, after removing baffle 7, can obtain the speed of top temperature and gas to the diffusion of deep coal sample.

Further, the gas detector is a thermal conductivity gas analyzer.

Referring to fig. 3, the gas absorption cell 11 includes a spectrometer, a cell body having an air inlet, an air outlet and a light transmission window, a plane reflector 16 and a concave reflector 17 disposed on an inner wall of the cell body, and a heating belt 19 disposed in the cell body, wherein the spectrometer is configured to receive light passing through gas in the cell body and obtain concentration and components of the gas.

Referring to fig. 3, the bottom of the tank body is provided with a vibration-proof base 22.

An open carriage coal spontaneous combustion detection method comprises the following steps:

the temperature controller 14 is started to heat the heating rod 8, the signal of the thermocouple 6 is analyzed through the data analysis system 15, and a corresponding temperature field of the whole coal sample is obtained;

starting the gas collector, measuring the gas components and concentration generated by the combustion of the coal sample, and obtaining a corresponding gas field through a data analysis unit;

and adjusting the temperature change of the heating rod 8, measuring the data of the temperature field and the gas field at corresponding temperatures, and comparing and analyzing the data of the temperature field and the gas field measured when the heating rod 8 is at different temperatures to obtain the change rule of the temperature field and the gas field of the coal sample in the whole furnace body.

The adaptation according to the actual needs is within the scope of the invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.