A device and method for measuring parameters of diesel vapor generation and diffusion in a mine

Abstract

The present application belongs to the technical field of mine fire prevention and control, and particularly provides a mine diesel vapor underground occurrence and diffusion parameter measuring device and measuring method. The mine diesel vapor underground occurrence and diffusion parameter measuring device comprises a chamber model, a sensor group, a thermostat, a fan, a gas supply assembly, a vapor generation system and a hydrocarbon analyzer. The mine diesel vapor underground occurrence and diffusion parameter measuring method comprises the following specific processes: selecting a diesel sample to be monitored, selecting an obstacle model, starting the thermostat, the fan and the gas supply assembly, starting the vapor generation system, and recording monitoring data. The device integration forms a one-stop mine diesel vapor underground occurrence and diffusion parameter measuring device, and all influencing factor parameters are collected in a simulated environment, effectively avoiding the simulation environment errors in each test link in the step-by-step test, and the problem of inaccurate test results.

Description

Technical Field

[0001] This invention belongs to the field of mine fire prevention and control technology, and specifically provides a device and method for measuring the underground generation and diffusion parameters of diesel vapor in mines. Background Technology

[0002] With the development of the coal mining industry, more diesel fuel can be stored underground. The "Detailed Rules for Fire Prevention and Extinguishing in Coal Mines" stipulates that "if diesel locomotives are used underground and it is necessary to store diesel fuel underground, a dedicated storage chamber with independent ventilation must be provided, and safety measures must be formulated. The maximum amount of diesel fuel stored underground shall not exceed the mine's diesel fuel requirement for three days." Diesel vapors generated after a leak will accumulate in the storage chamber and are difficult to remove. High concentrations of diesel vapor can easily cause fires and explosions, threatening the safety of personnel underground in coal mines.

[0003] Currently, the equipment involved in diesel evaporation testing mainly includes a diesel evaporation rate measuring device, a device for measuring factors affecting diesel evaporation rate, and a device for measuring diesel vapor concentration in the space after diesel evaporation at room temperature. Each device and its corresponding measurement procedure is relatively independent and not interconnected, only containing the testing function of a single factor, resulting in limited functionality. The measured data may contain errors due to differences in the testing environment, and the correlation between the data is insufficient. Furthermore, relying solely on the above-mentioned equipment is insufficient to reproduce the underground chamber scenario and achieve the goal of simulating the diesel evaporation process under different ambient temperatures and simultaneously monitoring multiple related parameters.

[0004] Therefore, there is an urgent need for a device for measuring the underground generation and diffusion parameters of diesel vapor in mines that can meet the above-mentioned testing requirements. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a device for measuring the underground generation and diffusion parameters of diesel vapor in mines, including a chamber model, a sensor group, a constant temperature chamber, a blower, a gas supply component, a steam generation system, and a hydrocarbon analyzer. The chamber model is a cylindrical structure with a square cross-section, the same shape as an underground chamber in a coal mine. The constant temperature chamber is fitted outside the chamber model. The blower is installed at one end of the chamber model, which is the air inlet. The other end of the chamber model is connected to an external exhaust gas treatment device, which is the exhaust end. A multi-nozzle exhaust pipe is often inserted inside the chamber model, and the multi-nozzle exhaust pipe is located on the side near the air inlet. The multi-nozzle exhaust pipe is connected to the gas supply component through a pipeline. A steam conveying pipe is radially arranged in the middle of the side wall of the chamber model. The steam conveying pipe extends outward through the side wall of the constant temperature chamber and is connected to the steam generation system. A sampling pipe is axially inserted in the middle of the steam conveying pipe, and the sampling pipe is connected to the hydrocarbon analyzer.

[0006] The interior of the chamber model is equipped with obstacle models and sensor groups, with multiple sensor groups axially distributed at equal intervals within the chamber model.

[0007] Furthermore, multiple sensor groups are axially distributed at equal intervals within the chamber model.

[0008] Furthermore, the sensor group includes a wind speed sensor, a temperature sensor, and a multi-parameter sensor. The wind speed sensor is used to monitor the airflow rate inside the chamber model, the temperature sensor is used to monitor the temperature inside the chamber model, and the multi-parameter sensor is used to monitor the composition of the air inside the chamber model and the concentration of each component.

[0009] Furthermore, the steam generation system includes a housing, a gas collecting hood, a base plate, a mass sensor, a sample stage, and a temperature transmitter. The gas collecting hood is located in the upper middle part of the housing cavity and is connected to the end of the steam delivery pipe. A temperature transmitter is installed at the bottom of the housing, and a base plate is mounted on the bottom of the housing above the temperature transmitter. A mass sensor is installed above the base plate, and a sample stage is installed above the mass sensor.

[0010] Furthermore, the basic components of the gas supply assembly include three gas cylinders and a four-way mixing valve, which is connected to the three gas cylinders and the multi-nozzle exhaust pipe via pipelines.

[0011] Furthermore, the three gas cylinders are respectively filled with air, carbon monoxide, and methane.

[0012] A method for determining the underground generation and diffusion parameters of mining diesel vapor, the specific process of which is as follows:

[0013] Select the diesel sample to be monitored and place it into the steam generation system;

[0014] Select the obstacle model and place it inside the chamber model;

[0015] Start the thermostat, fan and air supply components, and adjust the temperature of the thermostat, the speed of the fan and the gas composition output by the air supply components according to the sensor group to match the wind speed in the chamber model with the chamber environment to be simulated.

[0016] The steam generation system is started, and the diesel sample in the steam generation system is heated and evaporated. The diesel vapor and hot air are mixed to form mixed steam. The mixed steam is input into the chamber model through the steam delivery pipe. At the same time, the mass of the diesel sample is recorded to obtain the curve of the diesel sample mass changing over time.

[0017] During the process of inputting the mixed steam into the chamber model, part of the mixed steam is transported to the hydrocarbon analyzer through the sampling pipe to analyze the composition of the mixed steam;

[0018] Record the data parameters returned by the sensor group in the aforementioned process.

[0019] The beneficial effects of using this invention are:

[0020] 1. By integrating equipment, a one-stop underground mining diesel vapor generation and diffusion parameter measurement device is formed. All influencing factors are collected in a simulated environment, which effectively avoids the problem of inaccurate test results caused by simulation environment errors in each test link that may occur in step-by-step testing.

[0021] 2. Applicable to the detection of diesel vapor generation and diffusion parameters in confined spaces in mine environments;

[0022] 3. It can perform diesel evaporation rate testing under varying temperature conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the underground diesel vapor generation and diffusion parameter measuring device for mining according to the present invention;

[0024] Figure 2 This is a flowchart of the method for measuring the underground generation and diffusion parameters of diesel vapor for mining according to the present invention.

[0025] The reference numerals in the figures include:

[0026] 1. Chamber model; 101. Obstacle model; 102. Wind speed sensor; 103. Temperature sensor; 104. Multi-parameter sensor;

[0027] 2. Constant temperature chamber; 3. Fan;

[0028] 4. Air supply components; 401. Multi-nozzle exhaust pipe;

[0029] 5. Steam generation system; 501. Steam delivery pipe; 502. Steam collection hood; 503. Base plate; 504. Mass sensor; 505. Sample stage; 506. Temperature transmitter;

[0030] 6. Hydrogen analyzer; 601. Sampling tube. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings.

[0032] Example 1

[0033] Reference Figures 1-2A device for measuring the generation and diffusion parameters of diesel vapor in underground mines includes a chamber model 1, a sensor group, a constant temperature chamber 2, a blower 3, a gas supply assembly 4, a vapor generation system 5, and a hydrocarbon analyzer 6. The chamber model 1 is a cylindrical structure with a square cross-section, similar in shape to an underground coal mine chamber. The constant temperature chamber 2 is fitted onto the outside of the chamber model 1. The blower 3 is mounted at one end of the chamber model 1, which is the air inlet. The other end of the chamber model 1 is connected to external exhaust gas treatment equipment, which is the exhaust outlet. The interior of chamber model 1 is frequently inserted with a multi-nozzle exhaust pipe 401, which is located on the side near the air inlet. The multi-nozzle exhaust pipe 401 is connected to the air supply assembly 4 through a pipeline. A steam delivery pipe 501 is radially arranged in the middle of the side wall of chamber model 1. The steam delivery pipe 501 extends outward through the side wall of constant temperature chamber 2 and is connected to the steam generation system 5. A sampling pipe 601 is axially inserted in the middle of the steam delivery pipe 501. The sampling pipe 601 is connected to the hydrocarbon analyzer 6.

[0034] The interior of chamber model 1 is equipped with obstacle model 101 and sensor group.

[0035] Specifically, the sensor group includes a wind speed sensor 102, a temperature sensor 103, and a multi-parameter sensor 104. The wind speed sensor 102 is used to monitor the air flow rate inside the chamber model 1, the temperature sensor 103 is used to monitor the temperature inside the chamber model 1, and the multi-parameter sensor 104 is used to monitor the composition of the air inside the chamber model 1 and the concentration of each component.

[0036] Multiple sensor groups are axially distributed at equal intervals within chamber model 1.

[0037] Example 2

[0038] Compared to Embodiment 1, the difference in this embodiment is as follows:

[0039] Specifically, the steam generating system 5 includes a housing, a gas collecting hood 502, a base plate 503, a mass sensor 504, a sample stage 505, and a temperature transmitter 506. The gas collecting hood 502 is located in the upper middle part of the inner cavity of the housing and is connected to the end of the steam delivery pipe 501. The temperature transmitter 506 is provided at the bottom of the housing, and the base plate 503 is mounted on the bottom of the housing above the temperature transmitter 506. The mass sensor 504 is provided above the base plate 503, and the sample stage 505 is provided above the mass sensor 504.

[0040] Preferably, the basic components of the gas supply assembly 4 include three gas cylinders and a four-way mixing valve. The three gas cylinders are respectively filled with air, carbon monoxide and methane. The four-way mixing valve is connected to the three gas cylinders and the multi-nozzle exhaust pipe 401 through pipelines.

[0041] When the simulated chamber environment contains other types of gases, additional gas cylinders and pipelines are installed;

[0042] Correspondingly, the detection target of the multi-parameter sensor 104 is matched with the category of mixed gas source components provided by the gas supply assembly 4 and the steam generation system 5.

[0043] Example 3

[0044] A method for measuring the underground generation and diffusion parameters of mining diesel vapor, using any one of the mining diesel vapor underground generation and diffusion parameter measuring devices in Examples 1 and 2, is described in the following steps:

[0045] Select the diesel sample to be monitored and place it into the steam generation system 5;

[0046] Select obstacle model 101 and place it into chamber model 1;

[0047] Start the constant temperature chamber 2, fan 3 and air supply component 4, and adjust the temperature of constant temperature chamber 2, the speed of fan 3 and the gas composition output by air supply component 4 according to the sensor group, so that the wind speed in chamber model 1 matches the chamber environment to be simulated.

[0048] The steam generation system 5 is started, and the diesel sample in the steam generation system 5 is heated and evaporated. The diesel vapor and hot air are mixed to form mixed steam. The mixed steam is input into the chamber model 1 through the steam delivery pipe 501. At the same time, the mass of the diesel sample is recorded to obtain the curve of the diesel sample mass changing with time.

[0049] During the process of inputting mixed steam into chamber model 1, part of the mixed steam is transported to hydrocarbon analyzer 6 via sampling pipe 601 to analyze the composition of the mixed steam;

[0050] Record the data parameters returned by the sensor group in the aforementioned process.

[0051] Specifically, during the experiment, wind speed sensor 102 recorded the wind speed change curves at each point in chamber model 1 over time, temperature sensor 103 recorded the temperature change curves at each point in chamber model 1 over time, multi-parameter sensor 104 recorded the concentration of gas components at each point in chamber model 1 over time, and hydrocarbon analyzer 6 detected the initial composition of the mixed steam. By comparing the data at each point, the effects of different types of obstacles and different gas concentrations and wind speeds on the diffusion rate of diesel vapor can be obtained.

[0052] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A device for measuring the underground generation and diffusion parameters of diesel vapor in mining operations, characterized in that: The system includes a chamber model, sensor array, constant temperature chamber, fan, air supply assembly, steam generation system, and hydrocarbon analyzer. The chamber model is a cylindrical structure with a square cross-section, similar in shape to an underground coal mine chamber. The constant temperature chamber is fitted outside the chamber model. The fan is mounted at one end of the chamber model, which is the air inlet. The other end of the chamber model is connected to external exhaust gas treatment equipment, which is the exhaust outlet. A multi-nozzle exhaust pipe is radially inserted inside the chamber model, located on the side near the air inlet. The multi-nozzle exhaust pipe is connected to the air supply assembly via a pipeline. A steam delivery pipe is radially arranged in the middle of the side wall of the chamber model. The steam delivery pipe extends outward through the side wall of the constant temperature chamber and is connected to the steam generation system. A sampling pipe is axially inserted in the middle of the steam delivery pipe, and the sampling pipe is connected to the hydrocarbon analyzer. The interior of the chamber model is equipped with an obstacle model and a sensor group, with multiple sensor groups axially distributed at equal intervals within the chamber model; The steam generation system includes a housing, a gas collection hood, a base plate, a mass sensor, a sample stage, and a temperature transmitter. The gas collection hood is located in the upper middle part of the housing cavity and is connected to the end of the steam delivery pipe. The temperature transmitter is installed at the bottom of the housing, and a base plate is mounted on the bottom of the housing above the temperature transmitter. The mass sensor is installed above the base plate, and the sample stage is installed above the mass sensor. The basic components of the gas supply assembly include three gas cylinders and a four-way mixing valve. The four-way mixing valve is connected to the three gas cylinders and the multi-nozzle exhaust pipe through pipelines.

2. The device for measuring the underground generation and diffusion parameters of diesel vapor in mining operations according to claim 1, characterized in that: The sensor group includes a wind speed sensor, a temperature sensor, and a multi-parameter sensor. The wind speed sensor is used to monitor the airflow velocity inside the chamber model, the temperature sensor is used to monitor the temperature inside the chamber model, and the multi-parameter sensor is used to monitor the composition of the air inside the chamber model and the concentration of each component.

3. The device for measuring the underground generation and diffusion parameters of diesel vapor in mining operations according to claim 1, characterized in that: The three gas cylinders contain air, carbon monoxide, and methane, respectively.

4. A method for measuring the underground generation and diffusion parameters of mining diesel vapor, using the device for measuring the underground generation and diffusion parameters of mining diesel vapor as described in any one of claims 1-3, the specific process of which is as follows: Select the diesel sample to be monitored and place it into the steam generation system; Select the obstacle model and place it inside the chamber model; Start the thermostat, fan and air supply components, and adjust the temperature of the thermostat, the speed of the fan and the gas composition output by the air supply components according to the sensor group to match the wind speed in the chamber model with the chamber environment to be simulated. The steam generation system is started, and the diesel sample in the steam generation system is heated and evaporated. The diesel vapor and hot air are mixed to form mixed steam. The mixed steam is input into the chamber model through the steam delivery pipe. At the same time, the mass of the diesel sample is recorded to obtain the curve of the diesel sample mass changing over time. During the process of inputting the mixed vapor into the chamber model, part of the mixed vapor is transported to the hydrocarbon analyzer via a sampling tube to analyze the composition of the mixed vapor.

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