Oil shale pyrolysis simulation test device, test system and method

Abstract

The present invention discloses an oil shale pyrolysis simulation test device and test system and method. The oil shale pyrolysis simulation test device comprises: a reactor cover and a reactor body, each provided with a flue gas inlet on the reactor cover; a reaction zone, an oil and gas outflow interlayer, and an oil and gas outlet in the reactor body; the flue gas inlet is connected to the upper portion of the reaction zone via a hot air pipe; an oil and gas outflow interlayer is provided between the reaction zone and the reactor body; and the oil and gas outlet is provided at the bottom of the reactor body. The oil shale pyrolysis simulation test system comprises an air compressor, a gas control cabinet, a combustion device, an oil shale pyrolysis simulation test reaction device, a cooling device, and a recovery device connected in series. Through the present invention, simulation experiments are conducted to carry out physical simulation experiments of oil shale thermal cracking under different temperature, pressure, and flow conditions and different carrier gas components, monitor the heating and pyrolysis effect of the oil shale, and obtain optimal process parameters by combining the yield, composition, and physicochemical characteristics of the oil and gas products.

Description

Technical Field

[0001] The invention belongs to the technical field of oil shale mining, and in particular relates to an oil shale pyrolysis simulation test device and a test system and a method thereof. Background Art

[0002] The in-situ conversion and extraction of organic matter from oil shale reservoirs, also known as underground retorting, involves direct retorting of the oil shale underground, allowing oil and gas to be extracted directly from underground through production wells. Depending on the heating method, these methods are primarily categorized as conduction heating (electric heating, combustion heating), fluid convection heating, radiation heating, and underground combustion convection heating.

[0003] Shale formations are heated using convection heating, and existing convection heating is a direct discharge method. There are two types of direct discharge methods: 1. Horizontal well direct discharge, in which a horizontal well is installed between the heating well and the production well. Heat enters the production well through the horizontal well and is discharged directly from the wellhead. 2. Horizontal fracturing direct discharge, in which the oil shale formation is fractured to create cracks. Heat enters the production well through the cracks and is discharged directly from the wellhead.

[0004] In particular, the in-situ extraction of shale oil by direct convection from horizontal wells has just started, and basic theoretical research is weak. Summary of the Invention

[0005] The present invention provides an oil shale pyrolysis simulation test system and method. Through meter-scale oil shale gas injection combustion in-situ cracking simulation tests, dynamic tests of carrier gas composition and volume, as well as flue gas pressurized reinjection safety indicators for in-situ cracking of oil shale are conducted, thereby obtaining process parameters for high heat transfer medium, low energy consumption, and high oil recovery.

[0006] The oil shale pyrolysis simulation test device includes: a reaction tank cover 41 and a reaction tank body 42, characterized in that: the reaction tank cover 41 is respectively provided with a flue gas inlet 412; the reaction tank body 42 is provided with a reaction zone 44, an oil and gas outflow interlayer 48, and an oil and gas outlet 49; the flue gas inlet 412 is connected to the upper part of the reaction zone 44 through a hot air pipe 4121; an oil and gas outflow interlayer 48 is provided in the tank between the reaction zone 44 and the reaction tank body 42; and the oil and gas outlet 49 is provided at the bottom of the reaction tank body 42.

[0007] The reaction tank body 42 is also provided with: a thermocouple 43, an upper pressure cover layer 45, a ceramsite layer 46, and a lower support layer 47; the thermocouple 43 is provided in the reaction zone 44; the upper pressure cover layer 45 is pressed on the ceramsite layer 46; the ceramsite layer 46 is pressed on the top of the reaction zone 44; an oil and gas flow outlet 442 is provided on the side of the reaction zone 44; the lower support layer 47 is an isolation frame supporting the reaction zone 44; filtering ceramsite sand is provided in the lower support layer 47, and pores for filtering oil and gas are provided on the edge of the lower support layer 47.

[0008] The oil shale pyrolysis simulation test system includes: an air compressor 1, a gas control cabinet 2, a combustion device 3, a cooling device 5, and a recovery device 6. The air compressor 1, the gas control cabinet 2, and the combustion device 3 are connected in series; the cooling device 5 and the recovery device 6 are connected; and the characteristic is that the combustion device 3 and the cooling device 5 are connected through the reaction device 4.

[0009] The air compressor 1 is provided with a delivery valve V1 at the delivery end; the delivery valve V1 is connected to the delivery pipe, and the delivery pipe is provided with a first pressure transmitter P1 and a first temperature sensor T1; the delivery pipe is divided into a combustion-supporting gas pipe and a heat-carrying gas pipe; the combustion-supporting gas pipe is provided with a combustion-supporting gas flowmeter F1, and the two ends of the combustion-supporting gas flowmeter F1 are connected in series to the combustion-supporting gas pipe through control valves V4 and control valves V5 respectively; the heat-carrying gas pipe is provided with a heat-carrying gas flowmeter F2, and the two ends of the heat-carrying gas flowmeter F2 are connected in series to the heat-carrying gas pipe through control valves V6 and control valves V7 respectively; the combustion device 3 and The connecting pipeline between the reaction device 4 is also connected to a temperature sensor T3; the connecting pipeline between the cooling device 5 and the recovery device 6 is also connected to a valve V10, a temperature sensor T4, a second pressure transmitter P2, and a valve V12; the valve V10, the temperature sensor T4, the second pressure transmitter P2 and the valve V12 are connected in series; one end of the recovery device 6 is connected to a valve V13; the other end of the recovery device 6 is connected in sequence to a valve V14, a valve V15, a gas flow meter F3, and a valve V16; the valve V16 is connected to a valve V17 and a valve V18 through a tee respectively.

[0010] The reaction device 4 is the aforementioned oil shale pyrolysis simulation test device.

[0011] The experimental method of the oil shale pyrolysis simulation test system is as follows:

[0012] 1) Pressure leak test: Before the test begins, perform a pressure leak test. Close valves V2, V9, V13, V17, and V18, and open all other valves. Start the air compressor and gradually increase the pressure to 5MPa. Use foam water to test the entire device for leaks to ensure that there are no leaks in the entire device. Then, shut down the air compressor and release the pressure.

[0013] 2) Air supply: Close valves V2, V9, V13 and V17, open the rest of the valves, start the air compressor, gradually increase the pressure to 2MPa, and adjust the flow rates of F1 and F2 to the required flow rates through regulating valves V4, V5, V6, V7, and F1, where F1 is the combustion-supporting gas flow rate and F2 is the heat-carrying gas flow rate;

[0014] 3) Gas supply: Start the gas control cabinet, adjust the pressure of the control cabinet to above 2MPa, open valve V2, and adjust the gas flow rate to the flow rate required for ignition through the gas control cabinet;

[0015] 4) Ignition: Start the combustion device to ignite the combustion-supporting gas and fuel gas mixed in the combustion device, and stably burn in the combustion device;

[0016] 5) Oil shale pyrolysis: The heat-carrying gas brings the heat generated by the combustion in the combustion device to the pyrolysis simulation test device, heating the oil shale in the pyrolysis simulation test device, causing the oil shale to pyrolyze and produce oil and gas;

[0017] 6) Cooling and recovery: The oil shale pyrolysis products and heat-carrying gas flow out of the pyrolysis simulation test device, enter the cooling device to cool them down, and then enter the recovery device to be recovered through the liquid phase outlet and the gas phase outlet respectively.

[0018] The present invention discloses an oil shale pyrolysis simulation test system and method. The pyrolysis simulation test device includes: a reaction tank cover 41 and a reaction tank body 42, wherein the reaction tank cover 41 is respectively provided with a flue gas inlet 412; the reaction tank body 42 is provided with a reaction zone 44, an oil and gas outflow interlayer 48, and an oil and gas outlet 49; the flue gas inlet 412 is connected to the upper part of the reaction zone 44 through a hot air pipe 4121; an oil and gas outflow interlayer 48 is provided in the tank between the reaction zone 44 and the reaction tank body 42; and the oil and gas outlet 49 is provided at the bottom of the reaction tank body 42. The oil shale pyrolysis simulation test system comprises an air compressor 1, a gas control cabinet 2, a combustion device 3, an oil shale pyrolysis simulation test device, a cooling device 5, and a recovery device 6 connected in series. Through the present invention, simulation experiments are carried out to carry out physical simulation experiments of oil shale thermal cracking under different temperature, pressure and flow conditions and different carrier gas components, monitor the heating and pyrolysis effect of oil shale, and obtain optimal process parameters by combining the yield, composition and physicochemical characteristics analysis of oil and gas products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the oil shale pyrolysis simulation test device of the present invention;

[0020] Figure 2 This is a schematic diagram of the oil shale pyrolysis simulation test system of the present invention;

[0021] Air compressor 1, gas control cabinet 2, combustion device 3, reaction device 4, cooling device 5, recovery device 6, reaction tank upper cover 41, connecting flange 411, reaction tank body 42, flue gas inlet 412, safety valve 413, pressure gauge 414, hot air pipe 4121, thermocouple 43, reaction zone 44, upper pressure cover layer 45, ceramsite layer 46, lower support layer 47, oil and gas outflow interlayer 48, oil and gas outlet 49, oil and gas outlet 442, flue gas inlet 412. DETAILED DESCRIPTION

[0022] Example 1 Oil shale pyrolysis simulation test device

[0023] See also Figure 1 As shown, the oil shale pyrolysis simulation test device is a circular tank body, comprising: a reaction tank cover 41 and a reaction tank body 42, wherein the reaction tank cover 41 is sealedly connected to the reaction tank body 42 via a connecting flange 411;

[0024] The upper cover 41 of the reaction tank is provided with a flue gas inlet 412, a safety valve 413, and a pressure gauge 414; a hot air pipe 4121 is provided inside the flue gas inlet 412;

[0025] The reaction tank body 42 is provided with a thermocouple 43, a reaction zone 44, an upper pressure cover layer 45, a ceramsite layer 46, a lower support layer 47, an oil and gas outflow interlayer 48, and an oil and gas outlet 49;

[0026] A reaction zone 44 is provided in the middle and lower part of the reactor body 42. A thermal insulation lining 441 is provided in the reaction zone 44. A thermocouple 43 is provided inside the thermal insulation lining 441. A plurality of thermocouples 43 are provided inside the thermal insulation lining 441. The thermocouples 43 are provided with thermocouple electrical connection terminals 431. The thermocouple electrical connection terminals 431 are mounted on the side wall of the reactor body 42.

[0027] The lower end of the hot air pipe 4121 is located at the upper portion of the reaction zone 44;

[0028] The upper pressure capping layer 45 is pressed on the ceramsite layer 46; the ceramsite layer 46 is pressed on the top of the reaction zone 44; the side of the reaction zone 44 is provided with an oil and gas flow outlet 442;

[0029] The ceramsite layer 46 is a filter ceramsite sand;

[0030] The lower support layer 47 is an isolation frame that supports the reaction zone 44; the lower support layer 47 is provided with filtering ceramsite sand, and the edge of the lower support layer 47 is provided with pores for filtering oil and gas;

[0031] The reaction zone 44 and the reaction tank body 42 are provided with an oil and gas outflow interlayer 48;

[0032] The high-temperature medium output by the combustion device enters from the flue gas inlet 412 at the top, providing a heat source and carrier gas for the oil shale sample in the reactor;

[0033] The oil-gas mixture cracked in the reaction zone 44 is led out through the oil-gas outlet 49 below the reaction tank body 42 .

[0034] Example 2 Oil shale pyrolysis simulation test system

[0035] See also Figure 1 As shown, the oil shale pyrolysis simulation test system includes: an air compressor 1, a gas control cabinet 2, a combustion device 3, a reaction device 4, a cooling device 5, and a recovery device 6;

[0036] The air compressor 1 and the gas control cabinet 2 are connected to the combustion device 3; the combustion device 3, the reaction device 4, the cooling device 5, and the recovery device 6 are connected in series;

[0037] The air compressor 1 is a hot air type air supply air compressor; the air delivery volume of the air compressor 1 is: 20-100Nm3 / h;

[0038] The delivery air temperature of the air compressor 1 is less than 60°C;

[0039] The compressed air produced by the air compressor is divided into two paths: main air and jacket air, which enter the combustion device. The flow rate, temperature and pressure of the main air and jacket air are respectively monitored in real time. The main air provides combustion aid for the combustion device, and the jacket air is mixed with nitrogen and carbon dioxide gas to enter the combustion device for heat exchange.

[0040] The air compressor has a flow rate of 100 Nm3 / h and a working pressure of 5.0 MPa;

[0041] The delivery end of the air compressor 1 is provided with a delivery valve V1, which is connected to a delivery pipe, and the delivery pipe is provided with a first pressure transmitter P1 and a first temperature sensor T1;

[0042] The first pressure transmitter P1 is connected to the delivery pipe through the control valve V2;

[0043] The first temperature sensor T1 is connected to the delivery pipe;

[0044] The delivery pipe is divided into a combustion-supporting gas pipe and a heat-carrying gas pipe;

[0045] A combustion-supporting gas flow meter F1 is provided on the combustion-supporting gas pipe, and both ends of the combustion-supporting gas flow meter F1 are connected in series to the combustion-supporting gas pipe through control valves V4 and V5 respectively;

[0046] A heat carrier gas flow meter F2 is provided on the heat carrier gas pipe, and both ends of the heat carrier gas flow meter F2 are connected in series to the heat carrier gas pipe through control valves V6 and V7 respectively;

[0047] The gas control cabinet 2 is a device for controlling the gas flow. A gas buffer tank and a gas truck are provided in the gas control cabinet 2. The gas control cabinet 2 provides real-time metered high-pressure gas for the combustion device.

[0048] The gas control cabinet 2 adjusts the control cabinet pressure to above 2MPa;

[0049] In the combustion device 3, the main air and fuel gas are burned in the combustion device to release heat, and the jacket air is mixed with nitrogen and carbon dioxide gas in the combustion device for heat exchange; the high-temperature medium output by the combustion device provides a heat source and carrier gas for the oil shale sample in the reactor; the oxygen content of the high-temperature medium output by the combustion device is monitored in real time after cooling;

[0050] The combustion device is a heat source device for the dynamic test platform of the meter-scale oil shale gas injection combustion in-situ cracking simulation experiment. The main air and fuel gas are burned in the combustion device to release heat, and the jacket air is mixed with nitrogen and carbon dioxide gases to exchange heat and increase the temperature in the combustion device.

[0051] The connecting pipe between the combustion device 3 and the reaction device 4 is also connected with a temperature sensor T3;

[0052] The reaction device 4 is the pyrolysis simulation test device described in Example 1;

[0053] The reaction device 4 is a circular reaction device tank, which includes: a reaction tank cover 41 and a reaction tank body 42. The reaction tank cover 41 is sealed and connected to the reaction tank body 42 through a connecting flange 411.

[0054] The upper cover 41 of the reaction tank is provided with a flue gas inlet 412, a safety valve 413, and a pressure gauge 414; a hot air pipe 4121 is provided inside the flue gas inlet 412;

[0055] The reaction tank body 42 is provided with a thermocouple 43, a reaction zone 44, an upper pressure cover layer 45, a ceramsite layer 46, a lower support layer 47, an oil and gas outflow interlayer 48, and an oil and gas outlet 49;

[0056] A reaction zone 44 is provided at the lower portion of the reactor body 42. A thermal insulation lining 441 is provided in the reaction zone 44. A thermocouple 43 is provided inside the thermal insulation lining 441. A plurality of thermocouples 43 are provided inside the thermal insulation lining 441. The thermocouples 43 are provided with thermocouple electrical connection terminals 431. The thermocouple electrical connection terminals 431 are mounted on the side wall of the reactor body 42.

[0057] The upper pressure cover layer 45 is pressed on the ceramsite layer 46; the ceramsite layer 46 is pressed on the reaction zone 44; the side of the reaction zone 44 is provided with an oil and gas flow outlet 442;

[0058] The ceramsite layer 46 is a filter ceramsite sand;

[0059] The lower support layer 47 is an isolation frame that supports the reaction zone 44; the lower support layer 47 is provided with filtering ceramsite sand, and the edge of the lower support layer 47 is provided with pores for filtering oil and gas;

[0060] The reaction zone 44 and the reaction tank body 42 are provided with an oil and gas outflow interlayer 48.

[0061] The high-temperature medium output by the combustion device enters from the flue gas inlet 412 at the top of the reaction device 4, providing a heat source and carrier gas for the oil shale sample in the reactor;

[0062] The oil and gas mixture cracked in the reaction zone 44 is led out through the oil and gas outlet 49 below the reaction tank body 42;

[0063] The connecting pipe between the reaction device 4 and the cooling device 5 is also connected to a temperature sensor T4;

[0064] The cooling device 5 and recovery device 6 are mainly composed of a medium cooler consisting of a cooling water tank and heat exchange pipes, and a medium cooler consisting of a water tank and a discharge pipe. The output medium of the reactor flows through the discharge pipe and then exchanges heat with the cooling water in the water tank for cooling. The high-temperature medium flows through the heat exchange pipe and exchanges heat with the cooling water for cooling. The high-temperature medium at the reactor outlet is cooled by the medium cooler and then enters the medium recovery device for three-phase separation. The separated gas phase is measured by a flow meter and then discharged according to the test progress or merged into the air inlet of the air compressor for reinjection. The oil shale oil and water are collected and measured separately.

[0065] The connecting pipeline between the cooling device 5 and the recovery device 6 is also connected with a valve V10, a temperature sensor T4, a second pressure transmitter P2, and a valve V12; the valve V10, the temperature sensor T4, the second pressure transmitter P2, and the valve V12 are connected in series;

[0066] One end of the recovery device 6 is connected to a valve V13; the other end of the recovery device 6 is connected to valve V14, valve V15, gas flow meter F3, and valve V16 in sequence; valve V16 is connected to valve V17 and valve V18 respectively through a tee.

[0067] Example 3 Experimental Method of Oil Shale Pyrolysis Simulation Test System

[0068] The specific process is as follows:

[0069] 1) Pressure leak test: Before the test begins, perform a pressure leak test. Close valves V2, V9, V13, V17, and V18, and open all other valves. Start the air compressor and gradually increase the pressure to 5MPa. Use foam water to test the entire device for leaks to ensure that there are no leaks in the entire device. Then, shut down the air compressor and release the pressure.

[0070] 2) Air supply: Close valves V2, V9, V13 and V17, open the rest of the valves, start the air compressor, gradually increase the pressure to 2MPa, and adjust the flow rates of F1 and F2 to the required flow rates through regulating valves V4, V5, V6, V7, and F1, where F1 is the combustion-supporting gas flow rate and F2 is the heat-carrying gas flow rate;

[0071] 3) Gas supply: Start the gas control cabinet, adjust the pressure of the control cabinet to above 2MPa, open valve V2, and adjust the gas flow rate to the flow rate required for ignition through the gas control cabinet;

[0072] 4) Ignition: Start the combustion device to ignite the combustion-supporting gas and fuel gas mixed in the combustion device, and stably burn in the combustion device;

[0073] 5) Oil shale pyrolysis: The heat-carrying gas brings the heat generated by the combustion in the combustion device to the pyrolysis simulation test device, heating the oil shale in the pyrolysis simulation test device, causing the oil shale to pyrolyze and produce oil and gas;

[0074] 6) Cooling and recovery: The oil shale pyrolysis products and heat-carrying gas flow out of the pyrolysis simulation test device, enter the cooling device, and are cooled, and then enter the recovery device and are recovered through the liquid phase outlet and the gas phase outlet respectively;

[0075] Process flow:

[0076] The experiment begins by placing the sample into the reactor, starting the air compressor to supply air, activating the gas control system to output combustible gas, and igniting the combustible gas in the combustion device. The combustion device outputs a high-temperature carrier gas that serves as the heat source for the cracking of the oil shale sample and the product carrier gas. To adjust the carrier gas composition, nitrogen, carbon dioxide, and other gases are introduced through a reserved valve in the air compressor outlet process pipeline. After the pyrolysis is completed, the liquid product is collected to separate the oil shale oil and water, weighed, and sealed for storage. The produced gas is then tested for composition and volume.

[0077] Various types of fluids used in high-efficiency heating tests deep underground, mainly different test gases such as nitrogen, air, carbon dioxide, and carrier gases with different proportions, were selected to carry out oil shale thermal cracking tests under different conditions. Physical simulation tests were carried out under different temperature, pressure and flow conditions, and with different carrier gas components. The heating and pyrolysis effects of oil shale were dynamically monitored through a large number of temperature and pressure sensors, and the yield, composition and physicochemical properties of oil and gas products were analyzed to obtain the optimal process parameters.

Claims

1. Oil shale pyrolysis simulation test system, which includes: An air compressor (1), a gas control cabinet (2), a combustion device (3), a cooling device (5), and a recovery device (6), wherein the air compressor (1), the gas control cabinet (2), and the combustion device (3) are connected in series; the cooling device (5) and the recovery device (6) are connected; and the combustion device (3) and the cooling device (5) are connected via the reaction device (4); The air compressor (1) is provided with a delivery valve V1 at the delivery end; the delivery valve V1 is connected to the delivery pipe, and the delivery pipe is provided with a first pressure transmitter P1 and a first temperature sensor T1; the delivery pipe is divided into a combustion-supporting gas pipe and a heat-carrying gas pipe; the combustion-supporting gas pipe is provided with a combustion-supporting gas flowmeter F1, and the two ends of the combustion-supporting gas flowmeter F1 are connected in series to the combustion-supporting gas pipe through a control valve V4 and a control valve V5 respectively; the heat-carrying gas pipe is provided with a heat-carrying gas flowmeter F2, and the two ends of the heat-carrying gas flowmeter F2 are connected in series to the heat-carrying gas pipe through a control valve V6 and a control valve V7 respectively; the combustion device (3) is connected to the reaction The connecting pipeline between the devices 4 is also connected to a temperature sensor T3; the connecting pipeline between the cooling device (5) and the recovery device (6) is also connected to a valve V10, a temperature sensor T4, a second pressure transmitter P2, and a valve V12; the valve V10, the temperature sensor T4, the second pressure transmitter P2, and the valve V12 are connected in series; one end of the recovery device (6) is connected to a valve V13; the other end of the recovery device (6) is connected in sequence to a valve V14, a valve V15, a gas flow meter F3, and a valve V16; the valve V16 is connected to a valve V17 and a valve V18 through a tee. The reaction device (4) is an oil shale pyrolysis simulation test device, comprising: a reaction tank cover (41) and a reaction tank body (42), wherein the reaction tank cover (41) is provided with a flue gas inlet (412); the reaction tank body (42) is provided with a reaction zone (44), an oil and gas outflow interlayer (48), and an oil and gas outlet (49); the flue gas inlet (412) is connected to the upper part of the reaction zone (44) through a hot air pipe (4121); an oil and gas outflow interlayer (48) is provided in the reaction zone (44) and the reaction tank body (42); and the oil and gas outlet (49) is provided at the bottom of the reaction tank body (42); The reaction tank body (42) is further provided with: a thermocouple (43), an upper pressure cover layer (45), a ceramsite layer (46), and a lower support layer (47); the thermocouple (43) is provided in the reaction zone (44); the upper pressure cover layer (45) is pressed on the ceramsite layer (46); the ceramsite layer (46) is pressed on the top of the reaction zone (44); an oil and gas flow outlet (442) is provided on the side of the reaction zone (44); the lower support layer (47) is an isolation frame supporting the reaction zone (44); filtering ceramsite sand is provided in the lower support layer (47), and pores for filtering oil and gas are provided on the edge of the lower support layer (47); The reaction zone (44) is provided with a thermal insulation lining (441), and the thermocouple (43) is provided inside the thermal insulation lining (441); a plurality of thermocouples (43) are provided inside the thermal insulation lining (441), and the thermocouple (43) is provided with a thermocouple electrical connection end (431), and the thermocouple electrical connection end (431) is installed on the side wall of the reaction tank body (42).

2. The experimental method of the oil shale pyrolysis simulation test system is characterized by: The oil shale pyrolysis simulation test system according to claim 1 is used, and the specific process is as follows: 1) Pressure leak test: Before the test begins, perform a pressure leak test. Close valves V2, V9, V13, V17, and V18, and open all other valves. Start the air compressor and gradually increase the pressure to 5MPa. Use foam water to test the entire device for leaks to ensure that there are no leaks in the entire device. Then, shut down the air compressor and release the pressure. 2) Air supply: Close valves V2, V9, V13 and V17, open the rest of the valves, start the air compressor, gradually increase the pressure to 2MPa, and adjust the flow rates of F1 and F2 to the required flow rates through regulating valves V4, V5, V6, V7, and F1, where F1 is the combustion-supporting gas flow rate and F2 is the heat-carrying gas flow rate; 3) Gas supply: Start the gas control cabinet, adjust the pressure of the control cabinet to above 2MPa, open valve V2, and adjust the gas flow rate to the flow rate required for ignition through the gas control cabinet; 4) Ignition; Start the combustion device to ignite, ignite the combustion-supporting gas and fuel gas mixed in the combustion device, and burn stably in the combustion device; 5) Oil shale pyrolysis: The heat-carrying gas brings the heat generated by the combustion in the combustion device to the reaction device, heating the oil shale in the reaction device, causing the oil shale to pyrolyze and produce oil and gas; 6) Cooling and recovery: The oil shale pyrolysis products and heat-carrying gas flow out of the reaction device, enter the cooling device to cool them down, and then enter the recovery device to be recovered through the liquid phase outlet and the gas phase outlet respectively.

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