An infrared heating oil and gas pipeline simulation test device and method

Abstract

The present invention discloses an infrared heating oil and gas pipeline simulation test device, comprising: The present invention also provides a method for infrared heating oil and gas pipeline simulation test, a box body; air vents, which are opened at the top and bottom of the box body; at least two infrared heating catalytic plates; at least two outer heat insulation layers of the heating plates; a pipeline to be heated; at least two air supply branch pipes of the heating plates; at least two air supply branch pipes; a gas source; a flow regulating mechanism, which is connected and arranged between the gas source and the air supply branch pipes of the heating plates; a blower; a measurement and control system; a chiller. The infrared heating oil and gas pipeline undergoes a catalytic chemical reaction of gas in the catalytic reactor, and the heat is radiated to the outer wall of the oil and gas pipeline through the radiation heating plate to heat the oil and gas in the pipeline. There is no open fire and no safety risk in the whole test device. The present invention also discloses a method for infrared heating oil and gas pipeline simulation test, which can optimize the design of oil and gas pipelines with different heating condition requirements.

Description

Technical Field

[0001] The present invention relates to an infrared heating oil and gas pipeline simulation test device and method, belonging to the technical fields of energy utilization management and gas field technology. Background Art

[0002] Before oil and gas extraction, oil transportation, and natural gas transportation, it is usually necessary to heat and adjust the temperature of the oil and gas in the oil and gas pipeline. There are mainly two reasons: First, when the temperature in the oil and gas pipeline is too low, the viscosity of the oil and gas increases significantly. After heating and adjusting the temperature of the oil and gas, the transportation pressure of the oil and gas can be reduced, thereby reducing the transportation cost. Second, when the temperature of the working medium in the oil and gas pipeline is too low, water in the pipeline will precipitate and freeze, causing ice blockage. By adjusting the temperature, the risk of ice blockage during transportation can be reduced, the safety performance of the system can be improved, and the maintenance cost can also be reduced.

[0003] The heating methods of oil and gas pipelines generally include electric heating, water bath heating, etc. Analyzing from aspects such as system performance and safety: (1) The design of the electric heating system is simple. Generally, an electric heater or electric heating tape is wound around the outer wall of the pipeline to quickly heat the fluid in the pipeline to the required temperature. There were some applications in the early stage, but there are three problems: 1) When transporting oil and gas with a large flow rate, a large amount of electricity is consumed, and the operating cost is high; 2) Generally, electric energy is a scarce resource in the location of oil and gas development or transportation stations. A relatively large-scale electric energy transmission facility needs to be configured for a large amount of electric energy consumption, which is extremely inconvenient; 3) The working medium in the oil and gas pipeline is flammable and explosive gas. When using electric heating, the design requirements of the system are high, and it is easy to cause explosion risks. (2) During water bath heating, the temperature of water is heated by burning the gas in the oil and gas, and then the oil and gas pipeline is heated by the water. This technology has good heating effect on natural gas and is widely used at home and abroad, but there are three problems: 1) Water bath heat exchange consumes a large amount of water sources, and there are also certain requirements for water quality. Water containing alkali and salt will cause scaling, increasing the operating and maintenance costs; 2) Using oil and gas to heat water, and then heating the oil and gas pipeline through water, the thermal energy utilization rate is low; 3) The water bath heating of the oil and gas pipeline also has the risk of flammability and explosion during leakage, and the potential safety hazard is large. In summary, both of these two methods have potential safety hazards.

[0004] Patent CN203230387 discloses a skid-mounted device that uses natural gas from the wellhead for heating. In this device, the natural gas from the gas well wellhead is used to heat the water bath furnace, and the water bath furnace body is a horizontal water jacket heating furnace, but it does not solve the potential safety risk of gas combustion.

[0005] In the article "Far-infrared Single-well Gas Heater for Oil and Gas Gathering and Transportation System", oil and gas are premixed with air, and the porous combustion panel in the single-well heater serves as the heat source. The porous combustion panel is both the combustion holes and the infrared emitter; in the heating furnace, the porous combustion panels in the heating furnace heat the oil and gas pipe coils to ensure the crude oil gathering and transportation. This oil and gas gathering and transportation solution also requires oil and gas combustion, and there are still potential combustion safety risks. Summary of the Invention

[0006] The present invention designs and develops an infrared heating oil and gas pipeline simulation test device, which radiates heat to the outer wall of the oil and gas pipeline through a radiation heating plate to heat the oil and gas in the pipeline. There is no open flame and no safety risk in the whole test device.

[0007] The present invention also designs and develops an infrared heating oil and gas pipeline simulation test method, which conducts simulation on the heating oil and gas working conditions of the infrared heating oil and gas pipeline simulation test device through finite element simulation analysis, and obtains the test correlation formula for the heating effect of the oil and gas in the oil and gas pipeline to guide the optimization design of the oil and gas pipeline with different heating working condition requirements.

[0008] The technical solution provided by the present invention is as follows:

[0009] An infrared heating oil and gas pipeline simulation and test device, comprising:

[0010] A box body;

[0011] Air ventilation grilles, which are opened at the top and bottom of the box body;

[0012] At least two infrared heating catalytic plates, which are supported and arranged in the box body;

[0013] At least two outer heat insulation layers of the heating plates, which are respectively arranged outside the infrared heating catalytic plates in a matching manner;

[0014] The pipeline to be heated, which is arranged between the infrared heating catalytic plates;

[0015] At least two air supply branch pipes of the heating plates, one end of which respectively passes through the box body and the outer heat insulation layer of the heating plate and then communicates with the infrared heating catalytic plate;

[0016] At least two air supply branch pipes, one end of which respectively communicates with the air ventilation grilles;

[0017] A gas source, the output end of which communicates with the other end of the air supply branch pipe of the heating plate;

[0018] A flow regulating mechanism, which is connected and arranged between the gas source and the air supply branch pipe of the heating plate;

[0019] A blower, the output end of which communicates with the air supply branch pipe;

[0020] A measurement and control system, which is electrically connected to the flow regulating mechanism and the blower;

[0021] A chiller, which forms a communication loop with the heated pipeline.

[0022] Preferably, it further includes:

[0023] A surface temperature sensor of the heating plate, which is arranged on the infrared heating catalytic plate;

[0024] A space temperature sensor inside the infrared heating device, which is arranged inside the box body and outside the outer heat insulation layer of the heating plate;

[0025] A working medium temperature sensor inside the pipeline, which is arranged inside the heated pipeline;

[0026] An outer wall temperature sensor of the pipeline, which is arranged on the outer wall of the heated pipeline;

[0027] Among them, the surface temperature sensor of the heating plate, the space temperature sensor inside the infrared heating device, the working medium temperature sensor inside the pipeline and the outer wall temperature sensor of the pipeline are simultaneously electrically connected to the measurement and control system.

[0028] Preferably, the number of the infrared heating plates is four or eight, forming a cuboid structure with one or two open ends.

[0029] Preferably, the number of the infrared heating plates is two and they are arranged oppositely.

[0030] Preferably, the flow regulating mechanism includes:

[0031] A pressure reducing valve, one end of which is communicated with the output end of the gas source;

[0032] A flow regulating valve, one end of which is communicated with the other end of the pressure reducing valve, and the other end is communicated with the heating plate gas supply pipe.

[0033] Preferably, it further includes:

[0034] A working medium flow pipeline and a working medium driving pump;

[0035] Among them, a communication loop is formed among the working medium driving pump, the chiller and the heated pipeline through the working medium flow pipeline.

[0036] The beneficial effects of the present invention:

[0037] (1) The infrared heating oil and gas pipeline simulation test device of the present invention can conveniently adjust parameters such as the parameters of the outer coating of the oil and gas heating pipeline, the Reynolds number of the simulated working medium in the oil and gas pipeline, the distance between the infrared heating plate and the outer wall of the oil and gas pipeline, the thickness and heat insulation performance parameters of the heat insulation layer inside the infrared heating device, etc. to realize the simulation of the parameters of the infrared heating oil and gas pipeline;

[0038] (2) This infrared heating oil and gas pipeline simulation test method can obtain the experimental correlation between the heating efficiency and related parameters, which is used to obtain the best parameter matching when designing the infrared heating pipeline.

[0039] (3) This infrared heating oil and gas pipeline simulation test device uses a catalytic reaction heating plate to heat the working medium in the oil and gas pipeline. There is no open fire and no safety risk in the whole test device.

[0040] This experimental device can obtain the test method for realizing the infrared heating oil and gas pipeline, guide the optimization design of the oil and gas pipeline for different heating condition requirements, realize the improvement of the heating efficiency of the infrared heating oil and gas pipeline, and reduce the operation cost of the infrared heater. Brief Description of the Drawings

[0041] Figure 1 It is a schematic structural diagram of the infrared heating simulation test device for the oil and gas pipeline described in the present invention.

[0042] Figure 2 It is a schematic system diagram of the infrared heating oil and gas pipeline simulation test device described in the present invention.

[0043] Figure 3 It is a schematic structural diagram of the double heating channel simulation test device described in the present invention.

[0044] Figure 4(a) is a cross-sectional view of the finned strengthened pipeline described in the present invention.

[0045] Figure 4(b) is a longitudinal sectional view of the finned strengthened pipeline described in the present invention.

[0046] Figure 5 It is a test device diagram of two infrared heating plates and pipeline adjustment described in the present invention.

[0047] Figure 6 It is a schematic diagram of the layout of the surface temperature sensors of the infrared heating plate described in the present invention.

[0048] Figure 7 It is a schematic working process diagram of the simulation test method described in the present invention. Detailed Embodiments

[0049] The following further describes the present invention in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0050] As Figure 1-5As shown in the figure, the present invention provides an infrared heating oil and gas pipeline simulation test device, including: the first to fourth infrared heating catalytic plates 101 - 104, a gas source 2, a pressure reducing valve 201, a flow regulating valve 202, a gas supply main pipeline 3, the first to fourth heating plate supply branch pipes 301 - 304, a heating plate outer heat insulation layer 401, a heating plate surface temperature sensor 501, an infrared heating device internal space temperature sensor 502, a pipeline internal working medium temperature measurement sensor 503, a pipeline outer wall temperature sensor 504, a ventilation grille 601, an infrared heating device box body 701, a main air supply pipeline 8, a first air supply branch pipe 801, a second air supply branch pipe 802, a blower 9, a control system 10, a flow regulating valve control signal 1001, a blower frequency converter control signal 1002, the first to third temperature and humidity sensor acquisition circuits 1003 - 1005, a frequency converter 11, a chiller 12, a working medium driving pump 13, the first to second working medium flow pipelines, and a pipeline to be heated 1401.

[0051] The box body 701 of the infrared heating oil and gas pipeline simulation test device is of a cuboid structure with an accommodation cavity inside. At the top of the box body 701, a ventilation grille is provided. Inside the box body 701, at least two infrared heating catalytic plates are supported and arranged. Outside each infrared heating catalytic plate, a heating plate outer heat insulation layer 401 is correspondingly arranged. The pipeline to be heated 1401 is arranged between the infrared heating catalytic plates. At least two heating pipe supply branch pipes are respectively and correspondingly connected to the infrared heating catalytic plates. One end of each heating supply branch pipe sequentially passes through the box body 701 and the heating plate outer heat insulation layer 401 and then is connected to the infrared heating catalytic plate; one end of at least two air supply branch pipes is connected to the ventilation grille 601 at the top of the box body 701, and the other end of the air supply branch pipe is connected to the gas source 2. A flow regulating mechanism is connected between the gas source 2 and the heating plate supply branch pipes. The output end of the blower 9 is connected to the main air supply pipeline 8. The measurement and control system is electrically connected to the flow regulating mechanism and the blower. A communication loop is formed between the chiller 12 and the pipeline to be heated 1401. Among them, the flow regulating mechanism includes: a pressure reducing valve 201 and a flow regulating valve 202.

[0052] In the present invention, as a preference, the number of infrared heating catalytic plates is four, namely the first infrared heating catalytic plate 101, the second infrared heating catalytic plate 102, the third infrared heating catalytic plate 103, and the fourth infrared heating catalytic plate 104. The four infrared heating catalytic plates are interconnected to form a cuboid structure with openings at both ends. Correspondingly, the number of heating plate outer insulation layers 401 is four, and the number of heating pipe supply branch pipes is also four, which are respectively: the first supply branch pipe 301, the second supply branch pipe 302, the third supply branch pipe 303, and the fourth supply branch pipe 304, as Figure 1 and Figure 2 shown.

[0053] In another embodiment, the number of infrared heating catalytic plates is eight, forming two cuboid structures with open structures at both ends, forming two channels. The two cuboid structures are supported adjacent to each other at intervals in the box body 701, and the heated pipeline passes through the two channels and is arranged along the axial direction, as Figure 3 shown.

[0054] In another embodiment, the number of infrared heating catalytic plates is two. The two infrared heating catalytic plates are supported relatively and parallelly inside the box body, and the bottom is fixed on two guide rails. The distance between the two heating plates is adjusted by the movement of the bottom guide rails. The heated pipeline is arranged between the two infrared heating catalytic plates, as Figure 5 shown. The simulation test device for multiple infrared heating catalytic plates can achieve the adjustment of the distance between the heating plates and the pipeline by the same principle.

[0055] Taking four infrared heating catalytic plates to form a cuboid with open structures at both ends as an example of the present invention, as Figure 1 and 2 shown, the gas source 2 reduces the pressure of the gas source 2 through the pressure reducing valve 201, and then the measurement and control system 10 adjusts the gas supply flow through the flow regulating valve 202. The gas after pressure reduction and flow regulation enters the first to fourth infrared catalytic heating plates 101 to 104 respectively through the gas main pipeline 3 and the first to fourth gas pipeline branches 301 to 304; the first to fourth infrared catalytic heating plates 101 to 104 are preheated first, (generally, natural gas is preheated to about 240 °C and liquefied gas is preheated to about 140 °C), and then the gas undergoes a catalytic reaction in the infrared catalytic heating plates and continuously maintains the catalytic reaction. The temperature of the infrared catalytic heating plates reaches 400 - 500 °C and radiates infrared rays outward.

[0056] The measurement and control system 10 drives the fluid in the chiller to flow by regulating the working medium driving pump 13, absorbs heat in the irradiation sections of the first to fourth infrared catalytic heating plates 101 to 104, and the working medium after absorbing heat returns to the chiller 12 for cooling, so as to realize the heating cycle simulation of the oil and gas working medium in the infrared heating oil and gas pipeline.

[0057] Air grille 601 is opened at both the top and bottom of the box body of the infrared heating device to realize the natural air circulation supply of the infrared heating device. The infrared heating simulation device can carry out infrared reaction through natural convection or forced convection. When carrying out natural convection infrared reaction, there is no need for a blower 8 to blow air outside the grille 601. When carrying out forced convection, the blower 9 can be regulated by the measurement and control system 10 and the frequency converter 11, so as to realize the regulation of the ventilation air volume.

[0058] Temperature sensors can be arranged at different positions on the surface of the heating plate in the oil and gas pipeline infrared heating simulation device, as Figure 2As shown, the temperatures inside the heated pipeline and on the outer wall surface of the pipeline can be measured by the internal temperature sensor 503 and the pipeline avoidance temperature sensor 504.

[0059] The heating pipeline of the infrared heating oil and gas pipeline simulation test device is not only Figure 1 and 3 the external smooth pipeline in, but also other form embodiments where the outer surface of the infrared oil and gas pipeline is a finned enhanced heat transfer pipeline, such as Figure 4(a) and 4(b) shown.

[0060] The present invention also provides an infrared heating oil and gas pipeline simulation test method, which is used to guide the optimization design of oil and gas pipelines with different heating condition requirements, and to achieve improving the heating efficiency of the infrared heating oil and gas pipeline and reducing the operation cost of the infrared heater, including:

[0061] The measurement and control system collects the outlet temperature and flow rate of the heating working medium, calculates the heat absorbed by the infrared heating device, collects the heating gas flow rate, and calculates the heating power of the infrared heating device; the heating efficiency of the infrared heating device is calculated by the ratio of the heat absorbed by the working medium to the heating power of the heating plate;

[0062] The formula for the heat absorbed by the infrared heating device is

[0063]

[0064] In the formula, c f is the average specific heat capacity of the fluid, is the mass flow rate of the fluid, t out is the sum of the outlet temperature of the fluid after heating, and t in is the inlet temperature of the fluid;

[0065] The infrared heating heat of the infrared heater heating plate is

[0066]

[0067] In the formula, η ε is the radiation heat conversion efficiency of the infrared heating plate, is the gas consumption of the infrared heating plate, q r is the lower calorific value of the gas of the infrared heating plate;

[0068] The calculation formula for the heating efficiency of the infrared heater is

[0069]

[0070] The experimental correlation formula for fitting the heating efficiency of the infrared heating device and related factors is used to simulate the working conditions of the oil and gas pipeline infrared heating simulation test device through finite element simulation. The parameter settings of the finite element simulation are adjusted, and the simulation results are compared with the test results;

[0071] The specific process is as follows:

[0072] 1) Using water as the fluid working medium, adjust the related factors of the infrared heating oil and gas pipeline (parameters such as inlet temperature, working medium flow rate, pipe wall coating, infrared heating distance, external heat insulation material, etc.), and measure the inlet and outlet temperatures;

[0073] 2) Conduct the working condition simulation of the oil and gas pipeline infrared heating simulation test device through finite element simulation. Select the same three-dimensional digital model as the test device. Under the set boundary conditions such as inlet temperature, working medium flow rate, pipe wall coating, external heat insulation material, initial temperature, etc., and the initial heat flux density condition of the set infrared heating plate, conduct a steady-state simulation to obtain the outlet temperature of the fluid working medium under steady-state conditions; through modifying the mesh division and boundary layer division, obtain the mesh-independent solution, and based on the temperature difference between the inlet and outlet of the finite element simulation and the physical properties of the working medium, obtain the heat absorbed by the heated fluid working medium;

[0074] 3) Under the determined mesh and boundary layer conditions above, respectively set different inlet temperatures, working medium flow rates, pipe wall coatings, external heat insulation materials, initial temperatures, and the same heat flux density condition of the infrared heating plate to obtain the outlet temperature of the fluid working medium under steady-state conditions, and calculate the heat absorbed by the heated fluid working medium;

[0075] 4) Through steps 2) - 3), correct the internal convective heat transfer parameters and radiative heat transfer parameters of the finite element simulation to make the heat absorbed by the working medium in the finite element simulation the same as the heat absorbed by the working medium in the actual test;

[0076] 5) Conduct data fitting. The experimental empirical correlation formula is described as

[0077]

[0078] In the formula, m1 ~ m5 are the coefficients of the corresponding parameters; ξ is the fitting coefficient, Re is the Reynolds number of the fluid in the pipeline, α is the absorptivity of the pipe wall coating, is the ratio of the distance between the heating plate and the pipe to the inner diameter of the pipe, δ i λ i is the product of the thickness of the heat insulation material and the thermal conductivity, δ p λ p is the product of the pipe wall thickness and the thermal conductivity, is the ratio of the fluid inlet temperature to the ambient temperature;

[0079] Taking the natural logarithm of both sides of the experimental correlation formula, it becomes

[0080]

[0081] For the above-obtained data, the coefficients of the corresponding experimental correlation formula can be obtained by using the method of linear fitting, and the least squares method can be used for linear fitting.

[0082] Through finite element simulation of the working conditions of heating oil and gas by the oil and gas pipeline infrared heating device, real working condition simulations with different working fluid flow rates and different oil and gas ratios are carried out. According to the simulation results, the experimental correlation formula between the infrared heater and related correlation factors is fitted, and based on the obtained experimental correlation formula, the device design and experimental verification of the real oil and gas infrared heating pipeline are carried out.

[0083] By using the same finite element simulation method verified by the experimental device, multiple groups of experimental working conditions for real oil and gas infrared heating are obtained, and then the experimental correlation formula is fitted according to the same method. In order to reflect the differences in the thermophysical properties of oil and gas and the oil and gas ratio and the experimental correlation formula obtained by using water as the working fluid, the correlation factors of the experimental correlation formula are corrected, and the correction formula is

[0084]

[0085] In the formula, χ i is the mass flow ratio of each component of oil, water, and gas, c pi is the specific heat capacity of each component, c pw is the specific heat capacity of water, and the other parameters are the same as above. The method for obtaining the coefficients m1 to m6 in the formula is the same as above.

[0086] Although the implementation schemes of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described here.

Claims

1. An infrared heating oil and gas pipeline simulation test method, characterized in that Including: The measurement and control system collects the outlet temperature of the heating working medium, the flow rate of the heating working medium, calculates the heat absorbed by the working medium, collects the heating gas flow rate, and calculates the heating power of the infrared heating device; the heating efficiency of the infrared heating device is calculated by the ratio of the heat absorbed by the working medium to the heating power of the infrared heating device; The formula for the heat absorbed by the working medium is: ； In the formula, is the average specific heat capacity of the fluid, is the mass flow rate of the fluid, is the sum of the outlet temperatures of the heated fluid, is the inlet temperature of the fluid; The heating power of the infrared heating device is: ； In the formula, is the radiation heat conversion efficiency of the infrared heating panel, is the gas consumption of the infrared heating panel, is the lower calorific value of the gas for the infrared heating panel; The calculation formula for the heating efficiency of the infrared heating device is: ； Fitting the experimental correlation formula between the heating efficiency of the infrared heating device and the correlation factors, simulating the working conditions of the infrared heating device for oil and gas pipelines through finite element simulation, adjusting the parameter settings of the finite element simulation, and comparing the simulation results with the experimental results; The experimental empirical correlation formula is described as: ； In the formula, is the coefficient of the corresponding parameter; is the fitting coefficient, is the Reynolds number of the fluid in the pipeline, is the absorptivity of the pipe wall coating, is the ratio of the distance between the heating plate and the pipeline to the inner diameter of the pipeline, is the product of the thickness of the heat insulation material and its thermal conductivity, is the product of the pipe wall thickness and its thermal conductivity, is the ratio of the fluid inlet temperature to the ambient temperature; Simulating the working conditions of heating oil and gas of the infrared heating device for oil and gas pipelines through finite element, carrying out real working condition simulations with different working medium flow rates and different oil and gas ratios, fitting the experimental correlation formula between the infrared heating device and the relevant correlation factors according to the simulation results, and carrying out device design and experimental verification for the real oil and gas infrared heating pipeline based on the obtained experimental correlation formula; Adopting the same finite element simulation method verified by the infrared heating device, obtaining multiple groups of experimental working conditions of real oil and gas infrared heating, and then fitting the experimental correlation formula in the same way. In order to reflect the differences in the thermophysical properties of oil and gas and the oil and gas ratio from the experimental correlation formula obtained by using water as the working medium, the correlation factors of the experimental correlation formula are corrected, and the correction formula is: ； In the formula, is the mass flow rate ratio of each component of oil, water, and gas, is the specific heat capacity of each component, is the specific heat capacity of water, and other parameters are the same as above. The coefficient in the formula is obtained in the same way as above.

2. The infrared heating oil and gas pipeline simulation test method according to claim 1, characterized in that Using an infrared heating oil and gas pipeline simulation test device to conduct simulation tests, the infrared heating oil and gas pipeline simulation test device includes: A box body; Air vents, which are opened at the top and bottom of the box body; At least two infrared heating catalytic plates, which are supported and arranged inside the box body; At least two outer heat insulation layers of the heating plates, which are respectively arranged outside the infrared heating catalytic plates; A heated pipeline, which is arranged between the infrared heating catalytic plates; At least two air supply branch pipes for the heating plates, one end of which sequentially passes through the box body and the outer heat insulation layer of the heating plate and then communicates with the infrared heating catalytic plate; At least two air supply branch pipes for ventilation, one end of which communicates with the air vents; A gas source, the output end of which communicates with the other end of the air supply branch pipe for the heating plate; A flow regulating mechanism, which is connected between the gas source and the air supply branch pipe for the heating plate; A blower, the output end of which communicates with the air supply branch pipe for ventilation; A measurement and control system, which is electrically connected to the flow regulating mechanism and the blower; A chiller, which forms a communication loop with the heated pipeline.

3. The infrared heating oil and gas pipeline simulation test method according to claim 2, wherein Also including: A surface temperature sensor of the heating plate, which is arranged on the infrared heating catalytic plate; An internal space temperature sensor of the infrared heating device, which is arranged inside the box body and outside the outer heat insulation layer of the heating plate; An in-pipeline working medium temperature sensor, which is arranged inside the heated pipeline; An outer wall temperature sensor of the pipeline, which is arranged on the outer wall of the heated pipeline; Wherein, the surface temperature sensor of the heating plate, the internal space temperature sensor of the infrared heating device, the in-pipeline working medium temperature sensor and the outer wall temperature sensor of the pipeline are simultaneously electrically connected to the measurement and control system.

4. The infrared heating oil and gas pipeline simulation test method according to claim 3, characterized in that The number of the infrared heating plates is four or eight, forming one or two rectangular parallelepiped structures with openings at both ends.

5. The infrared heating oil and gas pipeline simulation test method according to claim 4, wherein The number of the infrared heating plates is two, and they are arranged oppositely.

6. The infrared heating oil and gas pipeline simulation test method according to claim 4 or 5, characterized in that The flow rate regulating mechanism includes: A pressure reducing valve, one end of which is communicated with the output end of the gas source; A flow rate regulating valve, one end of which is communicated with the other end of the pressure reducing valve, and the other end is communicated with the heating plate gas supply pipe.

7. The infrared heating oil and gas pipeline simulation test method according to claim 6, characterized in that It further includes: A working medium flow pipeline and a working medium driving pump; Wherein, a communication loop is formed among the working medium driving pump, the chiller and the pipeline to be heated through the working medium flow pipeline.

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