Device and method for simulating influence of temperature variable on storage tank fire behavior

Abstract

A device and method for simulating the influence of temperature variables on storage tank fire behavior relates to the technical field of liquid fuel combustion research, and comprises a thermal insulation device, a combustion device arranged in the thermal insulation device, a second temperature probe and a second liquid level probe arranged in the combustion device, and a first temperature probe and a first liquid level probe arranged in the thermal insulation device. The heat preservation device is communicated with the heat exchange device through a liquid inlet pipe and a liquid outlet pipe, an electric valve and a flow probe are arranged on the liquid inlet pipe and the liquid outlet pipe respectively, and the infrared probe, the visible light probe and the heat radiation probe are connected with the monitoring device. The combustion device is arranged in the heat preservation device with the heat preservation liquid medium, the temperature control device is used for controlling the temperature of the heat preservation liquid medium and simulating the temperature of the storage tank fire behavior combustion environment, and the monitoring probe and the monitoring device are used for collecting and displaying combustion behavior data and images.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid fuel combustion research, and particularly relates to a device and method for simulating the influence of temperature variables on the fire behavior of a storage tank. BACKGROUND

[0002] With the development of the petrochemical industry, storage tank fire accidents occur frequently, causing serious threats to personnel, property and the environment. The study of the fire behavior and heat transfer characteristics of storage tank fires is of great significance for fire prevention, control and extinguishing. In the study of storage tank fires, ambient temperature and fuel initial temperature are key factors that affect the fire behavior, which directly affect the combustion rate, flame characteristics and heat transfer process.

[0003] Currently, storage tank fire research is mainly carried out through experimental simulation. CN118707021A discloses an intelligent measuring device and method for simulating the heat flow transfer between the side wall of a storage tank fire and oil, which mainly includes a combustion system, a heat flow transfer simulation system, a supply system, a measuring system and an intelligent control system. The device absorbs the heat flow of the side wall of the storage tank fire through a liquid heat transfer medium, and calculates the heat transfer of the side wall by measuring the temperature change before and after. CN115792084B proposes a device for simulating the extinguishing and reignition of storage tanks with different liquid levels, which includes a combustion simulator, a gas supply device, an extinguishing device, etc., and can simulate the storage tank fire and reignition process under different liquid levels.

[0004] In terms of combustion environment simulation, CN110389193B discloses a device for simulating the combustion environment of a stable combustion aid, which uses liquid fuel as energy to simulate the combustion of the combustion aid. The device heats the liquid fuel to make it vaporize and volatilize, achieving stable combustion. CN118914446A proposes an experimental device and calculation method for simulating oil immersion combustion in porous media, which can change the experimental slope to achieve ignition at a specified location on the experimental disc surface, and analyze the temperature field variation characteristics of oil immersion combustion in porous media. CN201503050U introduces a liquid fuel combustion device, which includes a fuel storage device and a fuel combustion device, and has the advantages of low cost, wide applicability and safety.

[0005] However, the existing technology has the following shortcomings in simulating the fire behavior of storage tanks: 1. The existing storage tank fire experimental device usually adopts the form of an oil pan, an oil pool or an oil tank for direct combustion, and lacks effective control of experimental boundary conditions such as ambient temperature and fuel initial temperature, resulting in poor comparability and repeatability of experimental results.

[0006] 2. The existing device cannot achieve the study of liquid fuel combustion behavior and heat transfer behavior under constant ambient temperature conditions, and cannot accurately simulate the combustion characteristics of storage tank fires under different seasons and different climate conditions.

[0007] 3. The prior art is difficult to study the liquid fuel combustion behavior and heat transfer behavior under the condition of environmental temperature change, and cannot simulate the influence of day and night temperature difference or weather change on the oil tank fire behavior.

[0008] 4. The existing device cannot effectively control the initial temperature of the fuel, and it is difficult to study the influence of different fuel initial temperatures on the combustion behavior, especially the precise study of the oil tank fire combustion mutation behavior under different temperature working conditions.

[0009] 5. The prior art lacks the research ability of the influence of the water mat layer temperature on the boiling and splashing behavior of the oil tank fire, and cannot simulate the boiling, splashing and other dangerous phenomena of the underwater oil layer after being heated. SUMMARY

[0010] In view of the above shortcomings and deficiencies of the prior art, the present application provides a device and method for simulating the influence of temperature variables on the behavior of the oil tank fire. The combustion device is arranged in the heat preservation device with heat preservation liquid medium, the temperature of the heat preservation liquid medium is controlled by the temperature control device, the combustion environment temperature of the oil tank fire is simulated, and the combustion behavior data and images are collected and displayed by the monitoring probe and monitoring device.

[0011] In order to achieve the above purpose, the main technical scheme adopted by the present application includes: A device for simulating the influence of temperature variables on the behavior of the oil tank fire, comprising a heat preservation device, a combustion device for filling and placing combustion experimental liquid is arranged in the heat preservation device, a second temperature probe and a second liquid level probe are arranged in the combustion device, the heat preservation device is used for filling and placing heat preservation liquid medium, a first temperature probe and a first liquid level probe are arranged in the heat preservation device, the heat preservation device is communicated with a heat exchange device through an inlet pipe and an outlet pipe, an electric valve and a flow probe are arranged on the inlet pipe and the outlet pipe respectively, the device further comprises a temperature control device connected with the first temperature probe, the first liquid level probe, the second liquid level probe, the electric valve, the flow probe and the heat exchange device, and further comprises an infrared probe, a visible light probe and a thermal radiation probe connected with a monitoring device, the second temperature probe and the second liquid level probe are connected with the monitoring device, the infrared probe, the visible light probe and the thermal radiation probe are used for collecting combustion data and images in the combustion device, and the monitoring device is used for recording and displaying the combustion data and images.

[0012] Further, the combustion device is a tank structure with an open top, the second liquid level probe is arranged at the bottom of the combustion device, and the second temperature probe is arranged in several parts according to the monitoring position.

[0013] Further, the heat preservation device is a tank structure with an open top, and a liquid discharge port is arranged at the bottom or the side wall of the heat preservation device, a heat preservation layer is arranged on the outer side of the side wall and the bottom plate of the heat preservation device, and a fireproof layer is arranged on the outer side of the heat preservation layer.

[0014] Furthermore, the insulation device is equipped with a support frame located at the center of the insulation device, and the combustion device is mounted on the support frame.

[0015] Furthermore, the maximum size of the opening of the insulation device is 3 to 5 times the maximum size of the opening of the combustion device.

[0016] Furthermore, the heat exchange device includes a heat exchanger, an inlet pipe and an outlet pipe connected to the heat exchanger, and a circulation pump is installed on the connected pipes.

[0017] Furthermore, the visible light probe is a high-speed camera.

[0018] Furthermore, the infrared probe is an infrared thermal imager.

[0019] Furthermore, the thermal radiation probe is a thermal radiometer.

[0020] The device test method for simulating the effect of temperature variables on the fire behavior of storage tanks includes the following steps: (1) Liquid fuel is filled into the combustion device, with the liquid level height h0; (2) Fill the insulation liquid medium into the insulation device so that the liquid level height h1 in the insulation device is consistent with the liquid fuel level height h0 in the combustion device; (3) Start the temperature control device, set the experimental temperature T1, start the heat exchange device, and open the electric valve to stabilize the temperature of the liquid medium in the heat preservation device at the set experimental temperature T1. (4) Activate the monitoring device, infrared probe, visible light probe, and thermal radiation probe; (5) After the temperature of the liquid fuel in the combustion device and the temperature of the liquid medium in the heat preservation device are both stabilized at the set experimental temperature T1, the liquid fuel in the combustion device is ignited to carry out the combustion experiment; the monitoring device displays and stores the data and images collected by the infrared probe, visible light probe, thermal radiation probe, second temperature probe, and second liquid level probe; the temperature control device controls the temperature of the liquid medium in the heat preservation device to be stabilized at the set experimental temperature T1. (6) At the end of the experiment, the liquid medium in the heat preservation device is discharged through the drain port.

[0021] The beneficial effects of the present invention are as follows: The present invention provides an apparatus and method for simulating the influence of temperature variables on the fire behavior of storage tanks. By setting the combustion device inside an insulation device with an insulation liquid medium, and using a temperature control device to control the temperature of the insulation liquid medium, the combustion environment temperature of the storage tank fire behavior is simulated. The combustion behavior data and images are collected and displayed by using a monitoring probe and a monitoring device.

[0022] The apparatus and method of this invention provide an experimental environment for studying the combustion and heat transfer behavior of liquid fuels under constant ambient temperature conditions. By combining a heat preservation device and a temperature control device, the experimental ambient temperature can be controlled to simulate combustion behavior under different temperature variations. The apparatus and method of this invention can provide a constant experimental ambient temperature, thereby eliminating the interference of ambient temperature fluctuations on experimental results and improving the reliability and repeatability of experimental data. Attached Figure Description

[0023] Fig. 1 This is a schematic diagram of the device structure for simulating the effect of temperature variables on the fire behavior of storage tanks according to the present invention. Fig. 2 This is a top view schematic diagram of the device for simulating the effect of temperature variables on the fire behavior of storage tanks according to the present invention; Fig. 3 This is a schematic diagram of the connection system between the monitoring element and the temperature control device of the device for simulating the effect of temperature variables on the fire behavior of storage tanks according to the present invention.

[0024] In the diagram: 1 is the heat preservation device, 2 is the first temperature probe, 3 is the first liquid level probe, 4 is the combustion device, 5 is the second temperature probe, 6 is the second liquid level probe, 7 is the inlet pipe, 8 is the outlet pipe, 9 is the electric valve, 10 is the flow probe, 11 is the heat exchange device, 11-1 is the heat exchanger, 11-2 is the circulating pump, 12 is the infrared probe, 13 is the visible light probe, 14 is the thermal radiation probe, 15 is the monitoring device, and 16 is the temperature control device. Detailed Implementation

[0025] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figs. 1-3 As shown, this invention provides an apparatus and method for simulating the influence of temperature variables on the fire behavior of a storage tank. The apparatus includes a heat preservation device 1, within which a combustion device 4 is installed for holding a combustion experimental liquid. The combustion device 4 contains a second temperature probe 5 and a second liquid level probe 6. Specifically, the combustion device 4 is mainly composed of side walls and a bottom plate, with an open top. It can be made of carbon steel or stainless steel, and its shape can be cylindrical, cuboid, or cube. The combustion device 4 is filled with the experimental liquid and includes the second temperature probe 5 and the second liquid level probe 6. The second liquid level probe 6 is located at the bottom of the combustion device 4; more specifically, it can be a pressure-type liquid level sensor. Multiple second temperature probes 5 can be installed, arranged at different heights within the combustion device 4 as needed to collect temperature data of the liquid fuel at different heights.

[0027] The heat preservation device 1 is used for filling and placing a heat preservation liquid medium, and the heat preservation liquid medium is water, heat conducting oil or other high boiling point liquid. Specifically, the heat preservation device 1 is mainly composed of a side wall and a bottom plate, the top is open, the bottom or the side wall is provided with a liquid outlet, the outer side of the side wall and the outer side of the bottom plate are provided with a heat preservation layer, the outer side of the heat preservation layer is provided with a fireproof layer, and the optional shape is a cylinder, a cuboid or a square, etc. Specifically, the heat preservation device 1 is provided with a support, the support is located at the center position of the heat preservation device 1, and the combustion device 4 is arranged on the support. Specifically, the maximum size of the opening of the heat preservation device 1 is 3 to 5 times the maximum size of the opening of the combustion device 4.

[0028] The heat preservation device 1 is provided with a first temperature probe 2 and a first liquid level probe 3. Specifically, the first temperature probe 2 and the first liquid level probe 3 can be arranged on the inner bottom of the heat preservation device 1, and are used for monitoring the temperature and the liquid level of the heat preservation liquid medium. The heat preservation device 1 is communicated with a heat exchange device 11 through an inlet pipe 7 and an outlet pipe 8, and the inlet pipe 7 and the outlet pipe 8 are respectively provided with an electric valve 9 and a flow probe 10. The heat preservation device 1 further comprises a temperature control device 16, which is connected with the first temperature probe 2, the first liquid level probe 3, the second liquid level probe 6, the electric valve 9, the flow probe 10 and the heat exchange device 11. Specifically, the temperature control device 16 can be a PLC temperature control device. The first liquid level probe 3 and the second liquid level probe 6 are monitored, so that the liquid level of the combustion experimental liquid in the combustion device 4 and the heat preservation liquid medium in the heat preservation device 1 are consistent, which is one of the prerequisite conditions for starting the temperature control device 16. In addition, the temperature control device 16 is also connected with the electric valve 9 and the flow probe 10, so that the electric valve 9 is opened, and the flow probe 10 detects that the inlet and outlet of the inlet pipe 7 and the outlet pipe 8 are smooth, which is the prerequisite condition for starting the temperature control device 16. When the first temperature probe 2 detects that the temperature of the heat preservation liquid medium in the heat preservation device 1 is higher or lower than the set temperature, and at the same time the first liquid level probe 3 and the second liquid level probe 6 detect that the liquid level of the combustion experimental liquid in the combustion device 4 and the heat preservation liquid medium in the heat preservation device 1 are consistent, the electric valve 9 is opened, and when the flow probe 10 detects that the inlet and outlet of the inlet pipe 7 and the outlet pipe 8 are smooth, the temperature control device 16 starts to heat or cool the heat preservation liquid medium in the heat preservation device 1, so that the temperature of the heat preservation liquid medium in the heat preservation device 1 is maintained at the set temperature during the combustion process. More specifically, the heat exchange device 11 comprises a heat exchanger 11-1, the inlet pipe 7 and the outlet pipe 8 are communicated with the heat exchanger 11-1, and a circulating pump 11-2 is arranged on the communicated pipeline. When heating or cooling is needed, the heat preservation liquid medium in the heat preservation device 1 is driven to flow by the inlet pipe 7, the outlet pipe 8 and the circulating pump 11-2, and exchanges heat with the heat exchanger 11-1. The heat exchanger 11-1 is an existing device, which can only heat or cool the heat preservation liquid medium.

[0029] The device also comprises an infrared probe 12, a visible light probe 13, a thermal radiation probe 14 connected with the monitoring device 15, the second temperature probe 5 and the second liquid level probe 6 are connected with the monitoring device 15, the infrared probe 12, the visible light probe 13 and the thermal radiation probe 14 are used to collect the combustion data and images in the combustion device 4, and the monitoring device 15 is used to record and display the combustion data and images. Specifically, the visible light probe 13 is a high-speed camera. The infrared probe 12 is an infrared thermal imager. The thermal radiation probe 14 is a thermal radiation meter.

[0030] The application also provides a device test method for simulating the influence of temperature variables on the fire behavior of a storage tank, comprising the following steps: (1) filling the liquid fuel in the combustion device 4 to a liquid level height h0; (2) filling the heat preservation liquid medium in the heat preservation device 1, so that the liquid level height h1 in the heat preservation device 1 is consistent with the liquid level height h0 of the liquid fuel in the combustion device 4; (3) starting the temperature control device 16, setting the experimental temperature T1, starting the heat exchange device 11, opening the electric valve 9, and stabilizing the temperature of the liquid medium in the heat preservation device 1 at the set experimental temperature T1; (4) starting the monitoring device 15, the infrared probe 12, the visible light probe 13 and the thermal radiation probe 14; (5) after the temperature of the liquid fuel in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stabilized at the set experimental temperature T1, igniting the liquid fuel in the combustion device 4 to perform a combustion experiment; the monitoring device 15 displays and stores the data and images collected by the infrared probe 12, the visible light probe 13, the thermal radiation probe 14, the second temperature probe 5 and the second liquid level probe 6; the temperature control device 16 controls the temperature of the liquid medium in the heat preservation device 1 to be stabilized at the set experimental temperature T1; (6) after the experiment is completed, the liquid medium in the heat preservation device 1 is discharged through the liquid discharge port.

[0031] Example 1 The present application provides a device for simulating the influence of temperature variables on the fire behavior of a storage tank, specifically a device for simulating the influence of environmental temperature and initial temperature on the fire behavior of a storage tank. The device can be used to study the combustion behavior and heat transfer behavior of liquid fuel under constant environmental temperature conditions, the combustion behavior and heat transfer behavior of liquid fuel under varying environmental temperature conditions, the influence of different fuel initial temperatures on the combustion behavior, and especially the combustion mutation behavior of oil tank fire under different temperature working conditions.

[0032] The device comprises a combustion device 4, a heat preservation device 1, a temperature control device 16, a heat exchange device 11 and a monitoring device 15.

[0033] The main body of the combustion device 4 is composed of a side wall and a bottom plate, the top is open, the material is carbon steel or stainless steel, and the shape is a cylinder. The combustion device 4 is filled with experimental liquid. The combustion device 4 is provided with a second temperature probe 5 and a second liquid level probe 6. The second liquid level probe 6 is located at the bottom of the combustion device 4, and a plurality of second temperature probes 5 are arranged at different height positions of the combustion device 4 according to the monitoring needs, for monitoring the temperature distribution of the liquid fuel at different heights.

[0034] The main body of the heat preservation device 1 is composed of a side wall and a bottom plate, the top is open, the bottom is provided with a liquid outlet, the shape is a cylinder, the outer side of the side wall and the outer side of the bottom plate are provided with a heat preservation layer, and the outer side of the heat preservation layer is provided with a fireproof layer. The heat preservation layer is made of polyurethane foam material with a thickness of 50mm, and the fireproof layer is made of fireproof paint with a thickness of 2mm.

[0035] The combustion device 4 is arranged in the heat preservation device 1, the heat preservation device 1 is provided with a support, the support is located at the center position of the heat preservation device 1, the combustion device 4 is arranged on the support, the height of the support is 200mm, the support is made of stainless steel and has good high temperature resistance and bearing capacity. The total height of the combustion device 4 and the support is less than or equal to the height of the heat preservation device 1.

[0036] The maximum size of the opening of the heat preservation device 1 is greater than the maximum size of the opening of the combustion device 4. Specifically, the maximum size of the opening of the heat preservation device 1 is 4 times the maximum size of the opening of the combustion device 4. Specifically, when the combustion device 4 is a cylinder with a diameter of 200mm, the heat preservation device 1 is a cylinder with a diameter of 800mm.

[0037] The heat preservation device 1 is filled with heat preservation liquid medium, which can be selected from water, heat conducting oil or other high boiling point liquid. The heat preservation device 1 is provided with a first temperature probe 2 and a first liquid level probe 3. The first liquid level probe 3 is located at the bottom of the heat preservation device 1. The temperature control device 16 is connected with the first temperature probe 2, the flow probe, the first liquid level probe 3 and the second liquid level probe 6. The temperature probe adopts K type thermocouple, the temperature measurement range is-50℃ to 1200℃, and the accuracy is ±0.5℃. The liquid level probe adopts capacitive liquid level meter, the measurement range is 0-1000mm, and the accuracy is ±1mm. The flow probe 10 adopts turbine flowmeter, the measurement range is 0.5-10m³ / h, and the accuracy is ±0.5%.

[0038] The heat exchange device 11 and the heat preservation device 1 are connected by two pipelines, one is the liquid inlet pipe 7 and the other is the liquid outlet pipe 8. The pipeline is provided with an electric valve 9, the electric valve 9 is connected with the temperature control device 16, the heat exchange device 11 is provided with a circulating pump, and the circulating pump is responsible for the circulation of the heat preservation liquid medium in the heat preservation device 1 and the heat exchange device 11. The circulating pump adopts centrifugal pump, the flow is 5m³ / h, the head is 20m, and the power is 1.5kW. The electric valve 9 adopts electric ball valve, the caliber is DN50, the working pressure is 1.6MPa, and the control accuracy is ±1%.

[0039] The heat exchange device 11 includes a heat exchanger 11-1 and a circulating pump 11-2. The outlet pipe 8 is connected to the inlet of the circulating pump 11-2. The outlet of the circulating pump 11-2 is connected to the inlet of the heat exchanger 11-1. The outlet of the heat exchanger 11-1 is connected to the inlet pipe 7.

[0040] The temperature control device 16 is connected to the heat exchange device 11. The temperature control device 16 controls the operation of the heat exchange device 11. The temperature control device 16 uses a PLC temperature controller with a control accuracy of ±0.1℃ and a control range of -10℃ to 100℃.

[0041] The monitoring device 15 can be a computer. The monitoring device 15 is connected to the visible light probe 13, the infrared probe 12, and the thermal radiation probe 14. The monitoring device 15 is used to monitor the combustion behavior and record experimental data. The visible light probe 13 uses a high-speed camera with a frame rate of 1000fps and a resolution of 1920x1080. The infrared probe 12 uses an infrared thermal imager with a temperature measurement range of -20℃ to 1500℃, a thermal sensitivity of 0.05℃, and a resolution of 640x480. The thermal radiation probe 14 uses a thermal radiation meter with a measurement range of 0-100kW / m² and an accuracy of ±3%.

[0042] The working principle of the device is as follows: The device is filled with a heat preservation liquid medium in the heat preservation device 1. The temperature control device 16 controls the heat exchange device 11 to heat or cool the heat preservation liquid medium, thereby controlling the temperature of the heat preservation liquid medium. The heat preservation liquid medium transfers heat to the liquid fuel in the combustion device 4 through heat conduction, allowing the liquid fuel to reach the preset initial temperature. After the temperature of the liquid fuel stabilizes, the liquid fuel is ignited. The monitoring device 15 records and displays various parameters during the combustion process, such as the combustion rate, flame height, and thermal radiation intensity. By adjusting the temperature of the heat preservation liquid medium, the device can simulate the fire behavior of the storage tank under different environmental temperature and initial temperature conditions.

[0043] The device has the following advantages: 1. The initial temperature of the liquid fuel can be accurately controlled, providing a reliable experimental platform for studying the effect of temperature on combustion behavior.

[0044] 2. The device can simulate the fire behavior of the storage tank under different environmental temperature conditions, providing a reliable experimental platform for studying the effect of environmental temperature on combustion behavior.

[0045] 3. The monitoring device can record and display various parameters during the combustion process, providing rich experimental data for studying combustion behavior.

[0046] 4. The device has a simple structure, is easy to operate, safe and reliable, and has good repeatability.

[0047] Example two This embodiment provides a method for simulating the effect of different temperatures on the combustion behavior of liquid fuel, which is based on the device in Example one, and the specific steps are as follows: (1) According to the experimental scheme, fill the required liquid fuel in the combustion device 4, and the liquid level height h0; The liquid fuel can be selected from common liquid fuels such as gasoline, diesel, crude oil, etc., or other specific liquid fuels. The liquid level height h0 is set according to the experimental needs, generally 1 / 3 to 2 / 3 of the height of the combustion device 4. For example, when the height of the combustion device 4 is 300 mm, the liquid level height h0 can be set to between 100 mm and 200 mm.

[0048] (2) Fill the heat preservation liquid medium in the heat preservation device 1, and make the liquid level height h1 in the heat preservation device 1 consistent with the liquid level height h0 of the liquid fuel in the combustion device 4; The heat preservation liquid medium can be selected from water, heat conducting oil or other high boiling point liquids. When the experimental temperature is high, heat conducting oil is selected as the heat preservation liquid medium to avoid the influence of water boiling on the experiment. The liquid level height h1 in the heat preservation device 1 is consistent with the liquid level height h0 of the liquid fuel in the combustion device 4, which can ensure that the liquid fuel is uniformly controlled by temperature.

[0049] (3) Operate the temperature control device 16, set the experimental temperature T1, start the heat exchange device 11, open the electric valve 9, and control the temperature of the liquid medium in the heat preservation device 1 to be stable at the set experimental temperature T1.

[0050] The experimental temperature T1 is set according to the experimental needs, generally in the range of room temperature to below the flash point of the liquid fuel. For example, for gasoline, the experimental temperature T1 can be set to 20-40℃; for diesel, the experimental temperature T1 can be set to 20-60℃; for crude oil, the experimental temperature T1 can be set to 20-80℃. The temperature control device 16 controls the heat exchange device 11 to heat or cool the heat preservation liquid medium through the PLC controller, so that the temperature of the heat preservation liquid medium is stable at the set experimental temperature T1, and the temperature fluctuation is controlled within ±0.5℃.

[0051] (4) Start the monitoring device 15, and monitor the visible light probe 13, infrared probe 12, thermal radiation probe 14, temperature probe, and liquid level probe; The monitoring device 15 collects, records and displays data of each sensor. The visible light probe 13 records the visible light image of the flame with a sampling frequency of 30 fps. The infrared probe 12 records the infrared image of the flame with a sampling frequency of 30 fps. The thermal radiation probe 14 records the thermal radiation intensity of the flame with a sampling frequency of 1 Hz. The temperature probe records the temperature of the liquid fuel and the heat preservation liquid medium with a sampling frequency of 1 Hz. The liquid level probe records the liquid level height of the liquid fuel and the heat preservation liquid medium with a sampling frequency of 1 Hz.

[0052] (5) After the temperature of the fuel in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stabilized at the set experimental temperature T1, ignite the liquid fuel in the combustion device 4. When the temperature of the fuel in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stabilized at the set experimental temperature T1, and the temperature fluctuation is controlled within ±0.5℃ for 30 minutes, ignite the liquid fuel in the combustion device 4 using an igniter. The igniter can be an electric spark igniter or a common ignition tool such as a match, and the ignition position is the center position of the liquid fuel surface.

[0053] (6) Control the monitoring device 15 to record experimental data. The monitoring device 15 continuously records various parameters during the combustion process, including combustion rate, flame height, thermal radiation intensity, temperature distribution, etc. The experimental duration is set according to experimental needs, generally 30 minutes to 2 hours. Experimental data is saved in real time to the computer hard disk for subsequent research.

[0054] (7) After the experiment is completed, control the liquid outlet of the heat preservation device 1 to lower and stabilize the liquid level height in the heat preservation device 1 to the same height as the support. Specifically, open the liquid outlet of the heat preservation device 1, and when the liquid level height in the heat preservation device 1 is stabilized to the same height as the support, close the liquid outlet.

[0055] (8) Adjust the set experimental temperature to conduct experimental research at different temperatures and monitor the influence of different fuel temperatures on fuel combustion behavior.

[0056] After completing a set of experiments, clean the combustion device 4, replace the new liquid fuel, adjust the set experimental temperature T2, and repeat steps (1) to (7) to conduct experimental research at different temperatures. By comparing experimental data at different temperatures, the influence of different fuel temperatures on fuel combustion behavior is studied.

[0057] This method can be applied to experimental research on liquid fuel combustion under the constraint conditions of oil pool or storage tank, can safely control the initial temperature boundary condition of fuel, and can study the influence of different fuel temperatures on combustion rate, flame behavior, thermal convection, and thermal wave transmission of heavy oil.

[0058] Through this method, experimental conditions can be provided for the following research: 1. The effect of different initial temperatures on the burning rate of liquid fuel. Generally, as the initial temperature increases, the burning rate of liquid fuel increases, but the extent of the increase is related to the type of fuel.

[0059] 2. The effect of different initial temperatures on the height and shape of the flame. Changes in initial temperature affect the height, width, and stability of the flame.

[0060] 3. The effect of different initial temperatures on the intensity of thermal radiation. Changes in initial temperature affect the intensity of thermal radiation from the flame, which in turn affects the degree of harm caused by the fire.

[0061] 4. The effect of different initial temperatures on the internal temperature distribution of liquid fuel. Changes in initial temperature affect the temperature gradient within the liquid fuel, which in turn affects the speed and manner of heat wave transmission.

[0062] 5. The effect of different initial temperatures on the behavior of combustion mutations. Under certain conditions, changes in initial temperature can cause mutations in combustion behavior, such as boiling overflow and splashing.

[0063] Example Three This example provides a method for simulating the effect of water cushion temperature on the boiling overflow and splashing behavior of oil tank fires. The method is based on the device in Example One, and the specific steps are as follows: (1) According to the experimental scheme, first fill the water as a water cushion in the combustion device 4, with a water layer height h2, then fill the oil, with an oil layer height h3, and the total liquid level height h = h2 + h3; The water cushion height h2 is set according to experimental needs, generally 1 / 6 to 1 / 3 of the height of the combustion device 4. The oil layer height h3 is set according to experimental needs, generally 1 / 3 to 1 / 2 of the height of the combustion device 4. For example, when the height of the combustion device 4 is 300 mm, the water cushion height h2 can be set to between 50 mm and 100 mm, and the oil layer height h3 can be set to between 100 mm and 150 mm.

[0064] (2) Fill the heat preservation liquid medium in the heat preservation device 1, so that the liquid level height h1 in the heat preservation device 1 is consistent with the total liquid level height h in the combustion device 4; The heat preservation liquid medium is selected as heat conducting oil to facilitate experiments at higher temperatures. The liquid level height h1 in the heat preservation device 1 is consistent with the total liquid level height h in the combustion device 4, which ensures that the water cushion and oil layer are uniformly temperature-controlled.

[0065] (3) Operate the temperature control device 16, set the experimental temperature T1, start the heat exchange device 11, open the electric valve 9, and control the temperature of the liquid medium in the heat preservation device 1 to be stable at the set experimental temperature T1.

[0066] The experimental temperature T1 is set according to the experimental requirements, generally in the range of normal temperature to below the boiling point of water. For example, the experimental temperature T1 can be set to 20℃, 40℃, 60℃, 80℃, 95℃, etc. The temperature control device 16 controls the heat exchange device 11 to heat the heat preservation liquid medium, so that the temperature of the heat preservation liquid medium is stabilized at the set experimental temperature T1, and the temperature fluctuation is controlled within ±0.5℃.

[0067] (4) Start the monitoring device 15 to monitor the visible light probe 13, the infrared probe 12, the thermal radiation probe 14, the second temperature probe 5, and the second liquid level probe 6. The monitoring device 15 collects, records, and displays data of each sensor. The visible light probe 13 records the visible light image of the flame and the possible boiling overflow spatter phenomenon, and the sampling frequency is increased to 100fps to capture the instantaneous boiling overflow spatter phenomenon. The infrared probe 12 records the infrared image of the flame and the possible boiling overflow spatter phenomenon, and the sampling frequency is 30fps. The thermal radiation probe 14 records the thermal radiation intensity of the flame, and the sampling frequency is 1Hz. The temperature probe records the temperature of the water cushion layer, the oil layer, and the heat preservation liquid medium, and the sampling frequency is 1Hz. The liquid level probe records the liquid level height of the water cushion layer, the oil layer, and the heat preservation liquid medium, and the sampling frequency is 1Hz.

[0068] (5) After the temperature of the water cushion layer in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stabilized at the set experimental temperature T1, ignite the oil in the combustion device 4. When the temperature of the water cushion layer in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stabilized at the set experimental temperature T1, and the temperature fluctuation is controlled within ±0.5℃ for 30 minutes, use an igniter to ignite the oil in the combustion device 4. The igniter is an electric spark igniter, and the ignition position is the center position of the oil surface.

[0069] (6) Control the monitoring device 15 to record experimental data, and pay special attention to the occurrence time, intensity, and duration of the boiling overflow spatter phenomenon. The monitoring device 15 continuously records various parameters during the combustion process, and pays special attention to the occurrence time, intensity, and duration of the boiling overflow spatter phenomenon. The experimental duration is set according to the experimental requirements, generally for 30 minutes to 2 hours, or until the boiling overflow spatter phenomenon ends. The experimental data is saved to the computer hard disk in real time for subsequent research.

[0070] (7) After the experiment is completed, control the liquid discharge outlet of the heat preservation device 1 to lower and stabilize the liquid level height in the heat preservation device 1 to the same height as the support, and then close the liquid discharge outlet.

[0071] (8) Adjust the set experimental temperature to carry out experimental research under different initial temperatures of the water cushion layer, and monitor the influence of different water cushion layer temperatures on the oil tank fire boiling overflow spatter behavior.

[0072] After completing a set of experiments, clean the combustion device 4, replace the new water and oil, adjust the set experimental temperature T2, repeat steps (1) to (7), and carry out experimental research under different initial temperatures of the water cushion. By comparing the experimental data under different initial temperatures of the water cushion, the influence of different water cushion temperatures on the boiling overflow spatter behavior of the oil tank fire is studied.

[0073] The method can be applied to the safety research of oil tank fires, can safely control the initial temperature boundary condition of the water cushion, can study the influence of different water cushion temperatures on the boiling overflow spatter behavior of the oil tank fire, and can provide a scientific basis for the prevention and extinguishing of oil tank fires.

[0074] The method can provide experimental conditions for the following studies: 1. The occurrence time law of the boiling overflow spatter phenomenon under different initial temperatures of the water cushion. Generally, as the initial temperature of the water cushion increases, the occurrence time of the boiling overflow spatter phenomenon will be advanced.

[0075] 2. The intensity law of the boiling overflow spatter phenomenon under different initial temperatures of the water cushion. The change of the initial temperature of the water cushion will affect the intensity of the boiling overflow spatter phenomenon, including the spatter height, spatter range, and spatter amount.

[0076] 3. The duration law of the boiling overflow spatter phenomenon under different initial temperatures of the water cushion. The change of the initial temperature of the water cushion will affect the duration of the boiling overflow spatter phenomenon.

[0077] 4. The influence law of the boiling overflow spatter phenomenon on the flame behavior under different initial temperatures of the water cushion. The boiling overflow spatter phenomenon will affect the height, width, and stability of the flame, and thus affect the degree of harm of the fire.

[0078] 5. The influence law of the boiling overflow spatter phenomenon on the burning rate under different initial temperatures of the water cushion. The boiling overflow spatter phenomenon will affect the burning rate of the oil, and thus affect the duration and total heat release of the fire.

[0079] Example Four The present embodiment provides a method for simulating the influence of ambient temperature changes on the behavior of a storage tank fire, which is based on the device in Example One, and the specific steps are as follows: (1) According to the experimental scheme, fill the required liquid fuel in the combustion device 4, and set the liquid level height h0. The liquid fuel is selected as crude oil, and the liquid level height h0 is set as 1 / 2 of the height of the combustion device 4. For example, when the height of the combustion device 4 is 300 mm, the liquid level height h0 is set as 150 mm.

[0080] (2) Fill the heat preservation liquid medium in the heat preservation device 1, so that the liquid level height h1 in the heat preservation device 1 is consistent with the liquid level height h0 of the liquid fuel in the combustion device 4; The heat preservation liquid medium is selected as heat conducting oil, the liquid level height h1 in the heat preservation device 1 is consistent with the liquid fuel level height h0 in the combustion device 4, and both are 150 mm.

[0081] (3) The temperature control device 16 is operated, the initial experiment temperature T1 is set, the heat exchange device 11 is started, and the electric valve 9 is opened, so that the temperature of the liquid medium in the heat preservation device 1 is stably controlled at the set initial experiment temperature T1. The initial experiment temperature T1 is set as 20 DEG C, the temperature control device 16 controls the heat exchange device 11 to heat or cool the heat preservation liquid medium through the PLC controller, so that the temperature of the heat preservation liquid medium is stably controlled at 20 DEG C, and the temperature fluctuation is controlled within ± 0.5 DEG C.

[0082] (4) The monitoring device 15 is started, and the visible light probe 13, the infrared probe 12, the thermal radiation probe 14, the temperature probe and the liquid level probe are monitored. The monitoring device 15 collects and records data of each sensor and displays, and the sampling frequency is the same as that of embodiment two.

[0083] (5) After the temperature of the fuel in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stably controlled at the set initial experiment temperature T1, the liquid fuel in the combustion device 4 is ignited. When the temperature of the fuel in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are stably controlled at 20 DEG C, and the temperature fluctuation is controlled within ± 0.5 DEG C for 30 minutes, the liquid fuel in the combustion device 4 is ignited by using an electric spark igniter. The ignition position is the center position of the surface of the liquid fuel.

[0084] (6) The temperature control device 16 is controlled according to the preset temperature change curve, the temperature of the liquid medium in the heat preservation device 1 is changed, and the change of the environment temperature is simulated. The preset temperature change curve is that the initial temperature is 20 DEG C, the temperature is increased to 80 DEG C at a rate of 2 DEG C / min, the temperature of 80 DEG C is kept for 30 minutes, and then the temperature is decreased to 20 DEG C at a rate of 2 DEG C / min. The temperature control device 16 controls the heat exchange device 11 to heat or cool the heat preservation liquid medium through the PLC controller, so that the temperature of the heat preservation liquid medium changes according to the preset temperature change curve, and the temperature fluctuation is controlled within ± 1 DEG C.

[0085] (7) After the experiment is finished, the liquid outlet of the heat preservation device 1 is controlled, the liquid level height in the heat preservation device 1 is lowered and stably controlled to be consistent with the height of the support, and the liquid outlet is closed when the liquid level height in the heat preservation device 1 is stably controlled to be consistent with the height of the support.

[0086] (8) The experiment data and images are recorded and displayed by controlling the monitoring device 15.

[0087] The monitoring device 15 continuously records various parameters during the combustion process, including the combustion rate, flame height, thermal radiation intensity, temperature distribution, etc. The experimental duration is the total time of the temperature change curve, approximately 120 minutes. Experimental data are saved in real time to the computer hard disk for subsequent research.

[0088] Through this method, the influence of environmental temperature changes on the fire behavior of the storage tank can be studied, especially the change pattern of the fire behavior of the storage tank during the process of environmental temperature rising and falling. This is of great significance for understanding the influence of environmental temperature changes on fire development in actual fire scenes.

[0089] This method can provide experimental conditions for the following studies: 1. The change pattern of the combustion rate of the storage tank fire during the process of environmental temperature rising. Generally, as the environmental temperature rises, the combustion rate of the liquid fuel will increase, but the increase amplitude is related to the fuel type and temperature change rate.

[0090] 2. The change pattern of the combustion rate of the storage tank fire during the process of environmental temperature falling. Environmental temperature falling will cause the combustion rate of the liquid fuel to decrease, but the decrease amplitude is related to the fuel type and temperature change rate.

[0091] 3. The influence pattern of environmental temperature changes on the flame height and morphology. Changes in environmental temperature will affect the height, width, and stability of the flame.

[0092] 4. The influence pattern of environmental temperature changes on the thermal radiation intensity. Changes in environmental temperature will affect the thermal radiation intensity of the flame, thereby affecting the degree of harm of the fire.

[0093] 5. The influence pattern of environmental temperature changes on the internal temperature distribution of the liquid fuel. Changes in environmental temperature will affect the temperature gradient inside the liquid fuel, thereby affecting the speed and mode of heat wave transmission.

[0094] 6. The influence pattern of environmental temperature changes on the combustion mutation behavior. Under certain specific conditions, changes in environmental temperature may cause mutations in combustion behavior, such as boiling overflow, splashing, etc.

[0095] Example Five This example provides a method for simulating the influence of different initial temperatures on the heat wave transmission behavior of heavy oil, which is based on the device in Example One, and the specific steps are as follows: (1) According to the experimental scheme, place heavy oil such as heavy oil or crude oil in the combustion device 4, with a liquid level height h0; Heavy oil is selected as heavy oil with an API gravity of 15, and the liquid level height h0 is set to 2 / 3 of the height of the combustion device 4. For example, when the height of the combustion device 4 is 300 mm, the liquid level height h0 is set to 200 mm.

[0096] (2) Fill the heat preservation liquid medium in the heat preservation device 1, and keep the liquid level height h1 in the heat preservation device 1 consistent with the heavy oil liquid level height h0 in the combustion device 4; The heat preservation liquid medium is selected as heat conducting oil, and the liquid level height h1 in the heat preservation device 1 is kept consistent with the heavy oil liquid level height h0 in the combustion device 4, both of which are 200 mm.

[0097] (3) Vertically arrange multiple temperature probes in the heavy oil in the combustion device 4 to form a temperature measurement array for monitoring the temperature distribution in the heat wave transmission process.

[0098] The temperature probe adopts K-type thermocouple, the temperature measurement range is -50°C to 1200°C, and the accuracy is ±0.5°C. The temperature probe is vertically arranged in the heavy oil, and is uniformly distributed from the bottom to the surface with a spacing of 20 mm. For example, when the heavy oil liquid level height is 200 mm, the temperature probe is arranged at positions 0 mm, 20 mm, 40 mm, 60 mm, 80 mm, 100 mm, 120 mm, 140 mm, 160 mm, 180 mm, and 200 mm from the bottom.

[0099] (4) Operate the temperature control device 16, set the experimental temperature T1, start the heat exchange device 11, open the electric valve 9, and control the temperature of the liquid medium in the heat preservation device 1 to be stable at the set experimental temperature T1.

[0100] The experimental temperature T1 is set to 40°C, the temperature control device 16 controls the heat exchange device 11 to heat the heat preservation liquid medium through the PLC controller, so that the temperature of the heat preservation liquid medium is stable at 40°C, and the temperature fluctuation is controlled within ±0.5°C.

[0101] (5) Start the monitoring device 15 to monitor the visible light probe 13, the infrared probe 12, the thermal radiation probe 14, the temperature probe, and the liquid level probe. The monitoring device 15 collects and records data of each sensor, and the sampling frequency is the same as that of embodiment two. Pay special attention to the data of the temperature measurement array to monitor the heat wave transmission process in the heavy oil.

[0102] (6) After the temperature of the heavy oil in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are both stable at the set experimental temperature T1, ignite the heavy oil in the combustion device 4; when the temperature of the heavy oil in the combustion device 4 and the temperature of the liquid medium in the heat preservation device 1 are both stable at 40°C, and the temperature fluctuation is controlled within ±0.5°C for 30 minutes, use an electric spark igniter to ignite the heavy oil in the combustion device 4. The ignition position is the center position of the surface of the heavy oil.

[0103] (7) Control the monitoring device 15 to record experimental data, and pay special attention to the data of the temperature measurement array to monitor the heat wave transmission process in the heavy oil.

[0104] The monitoring device 15 continuously records various parameters during the combustion process, with particular attention to the data from the temperature measurement array, for studying the propagation of thermal waves in heavy oil. The duration of the experiment is set according to the needs of the experiment, generally 2 to 4 hours, or until the thermal wave propagates to the bottom of the heavy oil. The experimental data are saved in real time to the computer hard disk for subsequent research.

[0105] (8) After the experiment is completed, control the drain outlet of the heat preservation device 1 to lower and stabilize the liquid level height in the heat preservation device 1 to be consistent with the height of the support. When the liquid level height in the heat preservation device 1 is stabilized to be consistent with the height of the support, close the drain outlet.

[0106] (9) Adjust the experimental temperature setting and conduct experimental research at different initial temperatures to monitor the influence of different initial temperatures on the thermal wave propagation behavior of heavy oil.

[0107] After completing a set of experiments, clean the combustion device 4, replace the new heavy oil, adjust the experimental temperature T2 (such as 60°C, 80°C, etc.), and repeat steps (1) to (8) to conduct experimental research at different initial temperatures. By comparing experimental data at different initial temperatures, the influence of different initial temperatures on the thermal wave propagation behavior of heavy oil is studied.

[0108] This method can be applied to the study of heavy oil storage tank fire safety, and can safely control the initial temperature boundary condition of heavy oil. It can study the influence of different initial temperatures on the thermal wave propagation behavior of heavy oil, and provide scientific basis for the prevention and extinguishing of heavy oil storage tank fires.

[0109] Through this method, the following research can be provided with experimental conditions: 1. The speed rule of thermal wave propagation in heavy oil at different initial temperatures. Generally, as the initial temperature increases, the speed of thermal wave propagation in heavy oil will increase, but the increase is related to the physical and chemical properties of heavy oil.

[0110] 2. The temperature gradient rule of thermal wave in heavy oil at different initial temperatures. The change of initial temperature will affect the temperature gradient of thermal wave in heavy oil, and then affect the way and efficiency of heat transfer.

[0111] 3. The physical and chemical change rule of heavy oil during thermal wave propagation at different initial temperatures. During the thermal wave propagation process, heavy oil will undergo physical and chemical changes, such as viscosity change, component separation, etc., which are closely related to the initial temperature.

[0112] 4. The influence rule of thermal wave propagation on combustion behavior at different initial temperatures. Thermal wave propagation will affect the combustion behavior of heavy oil, including combustion rate, flame height, thermal radiation intensity, etc., which are closely related to the initial temperature.

[0113] 5. The influence law of heat wave transfer on boiling overflow splashing behavior under different initial temperatures. Under certain conditions, heat wave transfer may cause boiling overflow splashing phenomenon, and the occurrence of this phenomenon is closely related to the initial temperature.

[0114] It should be noted that example one, example two, example three, example four, example five are all a kind of simulation environment temperature, initial temperature on the device of the influence of fire behavior of storage tank.

[0115] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and any modification, modification, replacement and modification of the above embodiments by those skilled in the art are within the scope of the present application.

Claims

1. A device for simulating the effect of temperature variables on the fire behavior of storage tanks, characterized in that: The device includes a heat preservation device (1), which contains a combustion device (4) for filling the combustion experiment liquid. The combustion device (4) contains a second temperature probe (5) and a second liquid level probe (6). The heat preservation device (1) is used to fill the heat preservation liquid medium. The heat preservation device (1) contains a first temperature probe (2) and a first liquid level probe (3). The heat preservation device (1) is connected to the heat exchange device (11) through an inlet pipe (7) and an outlet pipe (8). The inlet pipe (7) and the outlet pipe (8) are respectively equipped with an electric valve (9) and a flow probe (10). The device also includes a temperature control device (16). 6) Connected to the first temperature probe (2), the first liquid level probe (3), the second liquid level probe (6), the electric valve (9), the flow probe (10), and the heat exchange device (11), it also includes an infrared probe (12), a visible light probe (13), and a thermal radiation probe (14) connected to the monitoring device (15). The second temperature probe (5) and the second liquid level probe (6) are connected to the monitoring device (15). The infrared probe (12), the visible light probe (13), and the thermal radiation probe (14) are used to collect combustion data and images in the combustion device (4), and the monitoring device (15) is used to record and display combustion data and images.

2. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The combustion device (4) is a tank structure with an open top. The second liquid level probe (6) is set at the bottom of the combustion device (4). Several second temperature probes (5) are set according to the monitoring position.

3. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The heat preservation device (1) is a tank structure with an open top and a drain port at the bottom or side wall. The outer side wall and the outer bottom plate of the heat preservation device (1) are provided with a heat preservation layer and a fireproof layer is provided on the outer side of the heat preservation layer.

4. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The heat preservation device (1) is equipped with a support, which is located in the center of the heat preservation device (1), and the combustion device (4) is installed on the support.

5. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The maximum size of the opening of the heat preservation device (1) is 3 to 5 times the maximum size of the opening of the combustion device (4).

6. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The heat exchange device (11) includes a heat exchanger (11-1), an inlet pipe (7) and an outlet pipe (8) connected to the heat exchanger (11-1), and a circulating pump (11-2) is provided on the connected pipe.

7. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The visible light probe (13) is a high-speed camera.

8. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The infrared probe (12) is an infrared thermal imager.

9. The apparatus for simulating the effect of temperature variables on the fire behavior of storage tanks as described in claim 1, characterized in that: The thermal radiation probe (14) is a thermal radiation meter.

10. A testing method using the apparatus described in any one of claims 1-9 for simulating the effect of temperature variables on the fire behavior of storage tanks, characterized in that, Includes the following steps: (1) Fill the combustion device (4) with liquid fuel, with a liquid level of h0; (2) Fill the insulation liquid medium into the insulation device (1) so that the liquid level height h1 in the insulation device (1) is consistent with the liquid fuel level height h0 in the combustion device (4); (3) Start the temperature control device (16), set the experimental temperature T1, start the heat exchange device (11), open the electric valve (9), and stabilize the temperature of the liquid medium in the heat preservation device (1) at the set experimental temperature T1. (4) Start the monitoring device (15), infrared probe (12), visible light probe (13), and thermal radiation probe (14); (5) After the temperature of the liquid fuel in the combustion device (4) and the temperature of the liquid medium in the heat preservation device (1) are both stabilized at the set experimental temperature T1, the liquid fuel in the combustion device (4) is ignited to carry out the combustion experiment; the monitoring device (15) displays and stores the data and images collected by the infrared probe (12), the visible light probe (13), the thermal radiation probe (14), the second temperature probe (5), and the second liquid level probe (6); the temperature control device (16) controls the temperature of the liquid medium in the heat preservation device (1) to stabilize at the set experimental temperature T1; (6) At the end of the experiment, the liquid medium in the heat preservation device (1) is discharged through the drain port.

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