Detection equipment for coal spontaneous combustion symbolic gas

Abstract

The utility model discloses detection equipment for coal spontaneous combustion symbolic gas, which comprises an equipment case, and a front bin and a rear bin of the case are respectively provided with a heating tank for heating a coal sample bottle and a multi-path panel for detecting gas; compared with a traditional device for gas inlet detection after single-path temperature rise, an eight-path gas inlet mode is adopted, classified detection processing of different temperature stages can be carried out on temperature rise during gas detection, meanwhile, gas at different temperatures is not crossed in the detection process, the accuracy and singleness of the temperature of the gas to be detected are guaranteed, and the detection efficiency is improved. And when gas at different temperatures needs to be temporarily stored, classified temporary storage treatment can be performed on the gas, so that the function of synchronous treatment of cooling and detection is completed.

Description

Technical Field

[0001] The utility model belongs to the field of gas detection, and in particular relates to a detection device for characteristic gas of coal spontaneous combustion. Background Art

[0002] Chromatographic detection of gas is a commonly used gas analysis technology, which uses a chromatograph to separate and identify the various components in a mixed gas.

[0003] The steps are:

[0004] 1. First, you need to collect the gas sample to be tested. The sample can be introduced into the chromatograph through an air sampler or other collection system;

[0005] 2. The collected gas sample is injected into the chromatograph. This is usually done with a gas injector.

[0006] 3. The sample enters the chromatographic column, which is filled with solid or liquid adsorbent. Different components move at different rates in the column according to their chemical properties, thus achieving separation;

[0007] 4. The separated components pass through the detector, which measures the concentration of each component and generates a corresponding signal. Commonly used detectors include flame ionization detector (FID), thermal conductivity detector (TCD), etc. The specific choice depends on the application requirements and the properties of the substance being detected;

[0008] 5. By recording the signal output by the detector, a chromatogram of sample components and concentrations can be generated. These data can be analyzed by computer to determine the content of each gas component in the sample.

[0009] Before traditional gas chromatography detection, it needs to be heated up. During this process, when the chromatographic column is tested for air intake, it is mostly single-channel air intake, that is, the air intake and detection operations are separated, thereby reducing the operating efficiency.

[0010] A Chinese patent with authorization announcement number CN116148406A discloses a detection device for characteristic gas of spontaneous combustion of raw coal, including an inert gas container, an inert gas temperature control device connected to the inert gas container, a coal sample bottle connected to the inert gas temperature control device, a filtering mechanism connected to the coal sample bottle, a sampling mechanism connected to the filtering mechanism, and a characteristic gas content detector and control mechanism connected to the sampling mechanism.

[0011] The above technical solution has the following defects:

[0012] When the above equipment is used for gas detection, it is still a traditional one-way detection method. The same transmission pipeline is still used for detection of gases at different temperatures (after temperature treatment). This may easily cause inaccurate detection due to the same gas at different temperatures remaining in the pipeline. Utility Model Content

[0013] In view of the above defects, the utility model provides a detection device for the characteristic gas of coal spontaneous combustion, including an equipment chassis, wherein a fixed bin for fixing coal sample bottles, a heating tank for heating the coal sample bottles and a chromatograph for gas phase detection are installed inside the equipment chassis, the fixed bin and the heating tank are located in the front bin of the equipment chassis, the chromatograph is located in the rear bin of the equipment chassis, the rear bin is also equipped with a multi-way panel, a cooling pipe for cooling the gas is installed at the multi-way panel, the cooling pipe is connected to a multi-way sampling pipeline group through an air supply pipe, each group of the multi-way sampling pipeline group is installed with a solenoid valve for controlling the gas circuit, and the equipment chassis is equipped with a box door for sealing through hinges.

[0014] Furthermore, the number of the multi-channel sampling pipeline groups is eight, and each group of multi-channel sampling pipelines includes a gas collector. The input end and output end of each gas collector are respectively connected to the adjacent solenoid valve through pipeline I and pipeline II, and each pipeline I and pipeline II are connected in parallel with an input pipe and an output pipe through a three-way valve. The top end of the input pipe is connected to the output end of the cooling pipe, and the bottom end of the output pipe is connected to the input end of the chromatograph.

[0015] Through the above technical scheme, multiple independent gas transportation channels are formed, which are used to transport gases at different temperatures independently. This will not cause inaccurate detection results due to the fact that the gas passes through only one channel after being cooled to different temperatures. At the same time, the transported gas can be temporarily stored for sampling.

[0016] Furthermore, the solenoid valves at each group of the multi-channel sampling pipelines are synchronous switches.

[0017] Through the above technical solution, it is ensured that independent ventilation or sealing processing can be achieved at each gas collector.

[0018] Furthermore, the multi-channel sampling pipeline group, the cooling tube and the chromatograph are automatically controlled by a PLC controller.

[0019] Through the above technical solution, automated gas phase detection operations for gases of different temperatures can be achieved.

[0020] Furthermore, a cooling fan for heat dissipation is installed at the top of the rear compartment.

[0021] Through the above technical solution, the heat dissipation effect inside the equipment chassis is guaranteed.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] Compared with the traditional single-channel air intake detection equipment, the eight-channel air intake method can perform classified detection and processing on the temperature rise during gas detection at different temperature stages. At the same time, there is no intersection during the detection process of gases at different temperatures, ensuring the accuracy and singleness of the gas temperature to be detected. When it is necessary to temporarily store gases at different temperatures, they can also be classified and temporarily stored, thereby completing the functions of simultaneous cooling and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the rear warehouse in the utility model.

[0025] In the figure: 1. Equipment chassis; 2. Cabinet door; 3. Cooling fan; 4. Cooling pipe; 5. Air collector; 6. Tee; 7. Solenoid valve. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings provide embodiments of the device. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example

[0029] like Figure 1 As shown, this embodiment provides a detection device for characteristic gas of coal spontaneous combustion, including an equipment chassis 1, wherein a fixed bin for fixing coal sample bottles, a heating tank for heating the coal sample bottles, and a chromatograph for gas phase detection are installed inside the equipment chassis 1, the fixed bin and the heating tank are located in the front bin of the equipment chassis 1, the chromatograph is located in the rear bin of the equipment chassis 1, and a multi-way panel is also installed in the rear bin, and a cooling pipe 4 for cooling the gas is installed at the multi-way panel.

[0030] The cooling pipe is connected to a multi-channel sampling pipeline group through an air supply pipe. There are eight groups of multi-channel sampling pipeline groups (for clear description, they can be defined as channel a, channel b...channel h from top to bottom). Each group of multi-channel sampling pipelines includes a gas collector 5. It should be noted that the gas collector 5 is a tank body, and an insulation layer is added on the outside to reduce the change of internal gas temperature after sampling. The input and output ends of each gas collector 5 are connected to the adjacent solenoid valve 7 through pipeline I and pipeline II respectively. The solenoid valve 7 at each group of multi-channel sampling pipelines is a synchronous switch, that is, at channel a, through the control of the solenoid valves 7 on both sides, for the gas collector 5 here, an independent channel or temporary storage chamber is formed.

[0031] Each pipeline I and pipeline II is connected in parallel with an input pipe and an output pipe through a three-way valve 7. The top end of the input pipe is connected to the output end of the cooling pipe 4, and the bottom end of the output pipe is connected to the input end of the chromatograph. The three-way valve 7 is used to divert the gas to be detected to channel a, channel b...channel h.

[0032] The multi-channel sampling pipeline group, cooling tube 4 and chromatograph are automatically controlled by a PLC controller, so that the cooling tube 4 can be cooled to different temperatures (for example, heated to 15°C, 20°C... by steam) and the corresponding channels a, b... are opened respectively to perform automated sampling and detection (or sample retention) operations.

[0033] The equipment case 1 is provided with a case door 2 for sealing by means of hinges, and a cooling fan 3 for heat dissipation is installed at the top of the rear compartment to dissipate the heat when the internal electrical components are working.

[0034] The present embodiment describes a detection device for characteristic gas of spontaneous combustion of coal. When it is necessary to conduct a gas phase inspection on the gas, the coal sample bottle is first heated by a heating tank, and then the heated gas is cooled by a cooling tube 4 according to the need of gas detection (the cooling is performed in intervals as needed). For example, when the temperature is about to reach 45°C, the solenoid valve 7 at channel a is opened, so that the gas at 45°C is transported to the chromatograph via the gas collector 5 at channel a for detection, and then the solenoid valve 7 at channel a is closed, and the solenoid valve 7 at channel b is opened, and the gas cooled to 40°C is stored via the gas collector 5 at channel b, thereby repeatedly achieving independent gas path processing of gases at different temperatures.

[0035] It should be noted that since the processing speed of the chromatograph is greater than the cooling speed of the cooling tube 4, when performing classified detection on multiple temperatures, the gas that has been cooled to different temperatures can be stored in channel b...channel h respectively. At the same time, after the chromatograph completes the gas transportation of channel a, it will perform gas detection on channel b, thereby realizing the function of simultaneous processing of cooling and detection, improving the overall work efficiency and eliminating the need to wait.

[0036] It should be noted that the structure described in the utility model can be implemented in a variety of different forms and is not limited to the described embodiments. Any equivalent transformations made by ordinary technicians in this field using the contents of the utility model specification and drawings, or directly or indirectly applied to other related technical fields, such as the loading and unloading of other items, are included in the protection scope of the utility model.

Claims

1. A detection device for characteristic gas of spontaneous combustion of coal, comprising a device chassis, wherein a fixed bin for fixing a coal sample bottle, a heating tank for heating the coal sample bottle, and a chromatograph for gas phase detection are installed inside the device chassis, characterized in that: The fixed bin and the heating tank are located in the front bin of the equipment chassis, the chromatograph is located in the rear bin of the equipment chassis, the rear bin is also equipped with a multi-way panel, the multi-way panel is equipped with a cooling pipe for cooling the gas, the cooling pipe is connected to a multi-way sampling pipeline group through an air supply pipe, each group of the multi-way sampling pipeline group is equipped with a solenoid valve for controlling the gas circuit, and the equipment chassis is equipped with a sealing door through hinges.

2. The detection device for characteristic gas of coal spontaneous combustion according to claim 1, characterized in that: There are eight groups of the multi-channel sampling pipeline groups, and each group of multi-channel sampling pipelines includes a gas collector. The input end and the output end of each gas collector are respectively connected to the adjacent solenoid valve through pipeline I and pipeline II. Each pipeline I and pipeline II are connected in parallel with an input pipe and an output pipe through a three-way valve. The top end of the input pipe is connected to the output end of the cooling pipe, and the bottom end of the output pipe is connected to the input end of the chromatograph.

3. The detection device for characteristic gas of coal spontaneous combustion as claimed in claim 2, characterized in that: The solenoid valves at each group of the multi-channel sampling pipelines are synchronous switches.

4. The detection device for characteristic gas of coal spontaneous combustion as claimed in claim 2, characterized in that: The multi-channel sampling pipeline group, the cooling tube and the chromatograph are automatically controlled by a PLC controller.

5. The detection device for characteristic gas of coal spontaneous combustion according to claim 1, characterized in that: A cooling fan for heat dissipation is installed at the top of the rear compartment.

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