Device for detecting and simulating evolved gas and temperature of coal field fire

Abstract

The utility model discloses a device for detecting and simulating coal field fire evolved gas and temperature, and relates to the technical field of coal field fire area governance, the device comprises an experiment furnace body, a heating device, a first temperature monitoring device and a first gas analysis device are arranged in the experiment furnace body, an outer frame is arranged outside the experiment furnace body, and the first gas analysis device is arranged in the outer frame. A telescopic support is arranged on a supporting column of the outer frame, the outer frame is connected with a second temperature monitoring device and a second gas analysis device, and the problem that an existing coal field fire simulation device cannot analyze the change conditions of internal and external temperatures and gas components after spontaneous combustion of a coal body can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coalfield fire zone management, in particular to a device for detecting and simulating coalfield fire evolution gas and temperature. Background Art

[0002] Coalfield fire refers to a combustion accident that occurs within a mine or coalfield, threatening safe production, causing certain resource and economic losses or casualties. Spontaneous combustion of coal causes a large amount of underground coal resources to be burned, reduces coal resource reserves, threatens coal mine safety production, and seriously affects my country's strategy of developing energy to the west. The existence of coalfield fires also causes a large number of environmental and ecological problems, and relevant technical measures must be taken to curb the continued spread of coalfield fires.

[0003] In order to propose scientific control measures for coalfield fires, a large number of experimental simulation devices have been assembled, but the existing simulation devices all monitor and analyze the internal temperature and gas composition of the coal body. For example, there is a self-constructed semi-closed coal fire evolution experimental system, which includes an experimental furnace body with a built-in heating device, a temperature monitoring device and a gas analysis device. It simulates the "natural oxygen absorption effect" of coal spontaneous combustion and explores the changes in the internal temperature and gas composition of the coal body from normal temperature to the ignition point. The device can only analyze the internal conditions of the coal body from unburned to spontaneous combustion, but after spontaneous combustion, the temperature and gas composition of the coal body will also change with high temperature and other conditions.

[0004] What affects the environment and ecological environment is usually the external gas released by the coal after spontaneous combustion, but the device cannot monitor and analyze it. Utility Model Content

[0005] In order to solve the problem that the current coalfield fire simulation device is unable to analyze the changes in internal and external temperature and gas composition of the coal body after spontaneous combustion, the utility model provides a device for detecting the gas and temperature of simulated coalfield fire evolution, the device comprising an experimental furnace body, the experimental furnace body having a built-in heating device, a first temperature monitoring device and a first gas analysis device, an outer frame is provided on the outside of the experimental furnace body, the support columns of the outer frame are provided with retractable brackets, and the outer frame is connected to both the second temperature monitoring device and the second gas analysis device.

[0006] Principle of the utility model: the experimental furnace body includes a heating device, a first temperature monitoring device and a first gas monitoring device, etc., which are used to explore the changes in the internal temperature and gas composition of the coal body in the process from normal temperature to the ignition point, as well as the changes in the internal temperature and gas composition of the coal body after spontaneous combustion of the coal body; a retractable outer frame is built outside the experimental furnace body, and a second gas analysis device and a second temperature monitoring device are attached to the outer frame to explore the changes in the external temperature and gas composition of the coal body after spontaneous combustion. It has a simple structure, easy operation and low cost. The support columns of the outer frame are provided with retractable brackets, and the frame height can be flexibly adjusted to meet various complex experimental environments and experimental needs, and can be effectively used in simulation tests of coalfield fire evolution.

[0007] Furthermore, the retractable support is a hydraulic support.

[0008] Furthermore, the outer frame is provided with a plurality of connecting pieces slidably connected to the frame, and each of the connecting pieces is provided with a plurality of monitoring holes.

[0009] Furthermore, the second temperature monitoring device and the second gas analysis device are connected to the connecting piece through the monitoring hole. The flexible changeable detection position can realize real-time monitoring of the external temperature and gas composition of the coal body at any point above the experimental furnace body.

[0010] Furthermore, the second gas analysis device is connected to the monitoring hole by a gas collection tube, and the second temperature monitoring device is connected to the monitoring hole by an armored thermocouple.

[0011] Furthermore, the gas collection pipe is provided with a pressure reducing valve to adjust the pressure of the gas collection pipe, effectively reduce the pressure, and reduce the damage of the gas collection pipe.

[0012] Furthermore, the second gas analysis device is a gas chromatograph, which can detect the concentration of carbon oxygen and hydrocarbon gases in pollutants.

[0013] Furthermore, the number of the second temperature monitoring device and the second gas analysis device is multiple, so that multi-directional detection can be achieved.

[0014] Furthermore, the connection mode of the sliding connection is a slide rail connection.

[0015] One or more technical solutions provided by the utility model have at least the following technical effects or advantages:

[0016] 1. The experimental furnace body is equipped with a heating device, a first temperature monitoring device and a first gas analysis device, which can analyze the changes in the internal temperature and gas composition of the coal body from normal temperature to the ignition point, as well as the changes in the internal temperature and gas composition of the coal body after spontaneous combustion. An outer frame is provided on the outside of the experimental furnace body, and the supporting columns of the outer frame are provided with retractable brackets. The outer frame is connected to the second temperature monitoring device and the second gas analysis device, which can analyze the changes in the external temperature and gas composition of the coal body after spontaneous combustion. It has a simple structure, easy operation and low cost. The supporting columns of the outer frame are provided with retractable brackets, and the frame height can be flexibly adjusted to meet various complex experimental environments and experimental needs, and can be effectively used in simulation tests of coalfield fire evolution.

[0017] 2. The outer frame is provided with several connecting pieces that are slidably connected to the frame, each connecting piece is provided with several monitoring holes, and the second temperature monitoring device and the second gas analysis device are connected to the connecting pieces through the monitoring holes. The detection position can be flexibly changed to detect the changes in the external temperature and gas composition of the coal body in one or more directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of the present utility model, and do not constitute a limitation on the embodiments of the present utility model;

[0019] Figure 1 This is a schematic diagram of the outer frame structure of a device for detecting gas and temperature of simulated coalfield fire evolution according to the utility model;

[0020] Figure 2 It is a structural schematic diagram of a device for detecting gas and temperature of simulated coalfield fire evolution in the utility model, in which a connecting piece is connected to a second temperature monitoring device and a second gas analysis device;

[0021] Among them, 1-experimental furnace body, 2-external frame, 3-retractable bracket, 4-slide rail structure, 5-connecting piece, 6-monitoring hole, 7-gas collection pipe, 8-second gas analysis device, 9-armored thermocouple, 10-second temperature monitoring device, 11-pressure reducing valve. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those within the scope of this description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0024] Embodiment 1

[0025] refer to Figure 1 and Figure 2 This embodiment provides a device for detecting simulated coalfield fire evolution gas and temperature, the device includes an experimental furnace body 1, the experimental furnace body 1 has a built-in heating device, a first temperature monitoring device and a first gas analysis device, an outer frame 2 is provided outside the experimental furnace body 1, and the support column of the outer frame 2 is provided with a retractable bracket 3, and the outer frame 2 is connected to the second temperature monitoring device 10 and the second gas analysis device 8. The outer frame can be assembled from S11168 stainless steel square tubes, which have good corrosion resistance, high strength and high toughness, can be fire-resistant, high temperature resistant and corrosion-resistant, and can cope with high temperature conditions of coal fire experiments. The experimental furnace body 1 can be a semi-enclosed coal fire evolution experimental system device, and the heating device can be a heating rod.

[0026] In this embodiment, since the hydraulic support has a large supporting force and can withstand a large load, and also has high precision and stability, can ensure the normal operation of the equipment, and has the characteristics of easy installation and easy disassembly, in a preferred embodiment, the retractable support 3 is a hydraulic support.

[0027] The outer frame 2 is provided with a plurality of connectors 5 slidably connected to the frame, and each of the connectors 5 is provided with a plurality of monitoring holes 6. The second temperature monitoring device 10 and the second gas analysis device 8 are connected to the connectors 5 through the monitoring holes 6. The second gas analysis device 8 is connected to the monitoring holes 6 by a gas collection pipe 7, and the second temperature monitoring device 10 is connected to the monitoring holes 6 by an armored thermocouple 9. The gas collection pipe 7 is provided with a pressure reducing valve 11.

[0028] In this embodiment, the first temperature monitoring device, the first gas analysis device, the second temperature monitoring device 10, the second gas analysis device 8, the armored thermocouple 9, the gas collection pipe 7 and the pressure reducing valve 11 are all high temperature resistant devices to cope with the high temperature conditions of the coal fire experiment.

[0029] The length, width and height of the outer frame 2 are 620 mm×620 mm×950 mm respectively, and the length of the armored thermocouple 9 is 40 cm. The connector 5 can be loaded with a longer armored thermocouple and a gas collecting pipe, and a wider range of devices can be selected, thereby achieving more accurate monitoring.

[0030] The armored thermocouple 9 can be a WRNK-19K armored thermocouple. The armored thermocouple 9 is bendable and can be inserted into the interior from a small hole on the side of the experimental furnace body 1 or from the top of the monitoring hole 6, depending on the experimental requirements, so as to monitor the temperature more flexibly.

[0031] The first gas analysis device and the second gas analysis device 8 are gas chromatographs.

[0032] The number of the second temperature monitoring device 10 and the second gas analysis device 8 are both multiple. The number of the first temperature monitoring device and the first gas analysis device can also be multiple, and the internal temperature and gas composition changes of the coal body can be detected in multiple directions. The first temperature monitoring device and the second temperature monitoring device can be high temperature resistant temperature testers.

[0033] The connection mode of the sliding connection is a slide rail connection.

[0034] In this embodiment, other auxiliary devices may be installed on the outer frame 2 or the connecting member 5 to achieve multi-parameter monitoring.

[0035] Embodiment 2

[0036] On the basis of the first embodiment, the specific use method of the utility model is described in this embodiment: according to the actual conditions of the simulated coalfield, a coal sample that meets the test conditions is selected and placed in the experimental furnace body 1, and a first temperature monitoring device and a first gas analysis device that monitor the internal temperature and gas composition of the coal sample are installed inside the furnace body. The height of the outer frame 2 is adjusted to the target height through the retractable bracket 3. According to the preset temperature and gas monitoring point, the connector 5 is adjusted to the monitoring point by sliding horizontally, and the armored thermocouple 9 and the gas collection tube 7 are connected to the monitoring hole 6 of the connector 5. The armored thermocouple 9 and the gas collection tube 7 are respectively connected to the second temperature monitoring device 1 and the second gas analysis device 1. The device 10 is connected to the second gas analysis device 8, and a pressure reducing valve 11 is installed on the gas collection pipe 7. After the device is installed, the simulation experiment is started. The coal sample is heated to spontaneous combustion by the experimental furnace body 1. The first temperature monitoring device and the first gas analysis device inside the furnace body analyze the temperature and gas composition of the coal sample from room temperature to the ignition point and then to after combustion. The armored thermocouple 9 detects the external temperature, transmits the temperature data to the second temperature monitoring device 10, records the temperature change, and the gas collection pipe 7 collects the gas generated by the spontaneous combustion of the coal, and transmits it to the gas analysis device 8 for analysis, thereby realizing the analysis of the external temperature and gas changes of the spontaneous combustion of the coal.

[0037] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for detecting the gas and temperature of a simulated coalfield fire evolution, the device comprising an experimental furnace body (1), the experimental furnace body (1) having a built-in heating device, a first temperature monitoring device and a first gas analysis device, characterized in that: An outer frame (2) is provided outside the experimental furnace body (1), and a support column of the outer frame (2) is provided with a retractable bracket (3). The outer frame (2) is connected to both a second temperature monitoring device (10) and a second gas analysis device (8).

2. The device for detecting gas and temperature of simulated coalfield fire evolution according to claim 1, characterized in that: The retractable support (3) is a hydraulic support.

3. The device for detecting the gas and temperature of simulated coalfield fire evolution according to claim 1, characterized in that: The outer frame (2) is provided with a plurality of connecting members (5) slidably connected to the frame, and each of the connecting members (5) is provided with a plurality of monitoring holes (6).

4. The device for detecting the gas and temperature of simulated coalfield fire evolution according to claim 3, characterized in that: The second temperature monitoring device (10) and the second gas analysis device (8) are connected to the connecting piece (5) via the monitoring hole (6).

5. The device for detecting gas and temperature of simulated coalfield fire evolution according to claim 4, characterized in that: The second gas analysis device (8) is connected to the monitoring hole (6) by a gas collection pipe (7), and the second temperature monitoring device (10) is connected to the monitoring hole (6) by an armored thermocouple (9).

6. The device for detecting the gas and temperature of simulated coalfield fire evolution according to claim 5, characterized in that: The gas collection pipe (7) is provided with a pressure reducing valve (11).

7. The device for detecting the gas and temperature of simulated coalfield fire evolution according to claim 1, characterized in that: The second gas analysis device (8) is a gas chromatograph.

8. The device for detecting gas and temperature of simulated coalfield fire evolution according to claim 1, characterized in that: The number of the second temperature monitoring device (10) and the number of the second gas analysis device (8) are both plural.

9. The device for detecting gas and temperature of simulated coalfield fire evolution according to claim 3, characterized in that: The connection mode of the sliding connection is a slide rail connection.

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