Pyrolysis furnace feed double-bin double-valve inert gas pressurization sealing system

Abstract

The present application relates to pyrolysis furnace feed equipment technical field, disclose a kind of pyrolysis furnace feed double-bin double-valve inert gas pressure charging sealing system, including feed bin unit, valve unit, pressure charging unit, detection unit, control system and connecting pipeline;The feed bin unit includes the A bin and B bin arranged in series;The valve unit includes feed valve V1 and discharge valve V2, the feed valve V1 is used to control raw material from A bin into B bin, and the discharge valve V2 is connected to pyrolysis furnace feed port;The pressure charging unit is connected with B bin, for filling into B bin with pressure charging medium, and the pressure charging medium includes inert gas or steam.By the series connection of A bin and B bin and the cyclic operation mode of feed, pressure charging and discharge, the continuous feeding of pyrolysis furnace is effectively guaranteed, the escape of top gas is reduced, the poisoning of personnel by gas is prevented, and the quality of gas is effectively improved by preventing air from entering the furnace.

Description

Technical Field

[0001] This invention relates to the technical field of pyrolysis furnace feeding equipment, specifically a dual-compartment, dual-valve inert gas pressurization and sealing system for pyrolysis furnace feeding. Background Technology

[0002] As a core piece of equipment in the energy and chemical industry, the sealing of the pyrolysis furnace during the feeding process directly affects production efficiency, product quality, and environmental safety. During the pyrolysis reaction, the furnace is usually in a high-temperature environment containing flammable, explosive, or toxic gases. If the sealing performance of the feed inlet is poor, problems such as gas leakage and air infiltration can easily occur. Gas leakage not only wastes raw materials and increases energy consumption, but may also cause safety accidents. Air infiltration will damage the oxygen content in the purification system, leading to a decrease in the relative proportion of effective components in the gas and a reduction in the calorific value of the gas. Air infiltration into the furnace can also cause the electrostatic precipitator to trip, and in severe cases, it may lead to explosions.

[0003] Currently, the dual-compartment, dual-valve sealing system or simple nitrogen purging method used in pyrolysis furnace feeding sealing systems suffers from low sealing reliability. During single-compartment feeding, the compartment needs frequent connection to the outside environment to replenish raw materials. High-pressure gas inside the furnace is prone to leakage through the gaps in the feeding valves, resulting not only in energy waste but also in VOC emissions. S Emissions can cause environmental pollution and safety hazards. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dual-compartment, dual-valve inert gas pressurization and sealing system for pyrolysis furnace feeding, which solves the problem of continuous feeding in existing technologies, leading to gas leakage from the furnace top and gas poisoning of personnel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-compartment dual-valve inert gas pressurization and sealing system for pyrolysis furnace feeding, comprising a feeding compartment unit, a valve unit, a pressurization unit, a detection unit, a control system, and connecting pipelines; The feeding hopper unit includes hopper A and hopper B arranged in series; The valve unit includes a feed valve V1 and a discharge valve V2. The feed valve V1 is used to control the raw material to enter the B chamber from the A chamber, and the discharge valve V2 is connected to the feed port of the pyrolysis furnace. The pressurization unit is connected to chamber B and is used to pressurize chamber B with a pressurization medium, which includes inert gas or vapor; the detection unit is used to monitor the pressure data and material level data in chamber B. The control system is connected to the feed valve V1, the discharge valve V2, the pressurization unit, and the detection unit for automated control.

[0006] Preferably, both the feed valve V1 and the discharge valve V2 are valves with good wear resistance and sealing performance, and the sealing surfaces of the feed valve V1 and the discharge valve V2 are made of hard alloy material.

[0007] Preferably, the pressurization unit includes a storage tank, a pressure regulating valve, a flow meter, and a check valve. The storage tank is connected to compartment B via a connecting pipeline, and the pressure regulating valve, flow meter, and check valve are sequentially connected in series on the connecting pipeline.

[0008] Preferably, the pressure regulating valve is a precision pressure regulating valve, the flow meter is a high-precision flow meter, and a flow regulating valve is also provided on the connecting pipeline, the flow regulating valve being electrically connected to the control system.

[0009] Preferably, the detection unit includes a pressure sensor, a level gauge L1, and a level gauge L2. The pressure sensor is installed on the cavity of compartment B, the level gauge L1 is installed on the upper part of compartment B, and the level gauge L2 is installed on the lower part of compartment B.

[0010] Preferably, both the level gauge L1 and the level gauge L2 are high-temperature dust level gauges, and are equipped with internal anti-smashing protection devices.

[0011] Preferably, the control system adopts any one of a programmable logic controller, such as a PLC, PAC, or DCS.

[0012] Preferably, the control system employs pressure closed-loop control logic to ensure that the pressure in chamber B and related cavities is higher than the pressure inside the pyrolysis furnace.

[0013] Preferably, the control system has abnormal alarm and emergency shutdown functions. When the detection unit detects abnormal data, it can issue an alarm signal and control the feed valve V1, discharge valve V2 and pressure regulating valve of the pressurization unit to close.

[0014] Preferably, the A bin is equipped with a level gauge L3, and the B bin is equipped with a pressure relief valve to protect the device in case of overpressure or abnormal conditions. The pressure relief valve is connected to the VOC level gauge L3. S System connection.

[0015] Working principle: All valves are closed, and the pressure in compartment B and related chambers is the same as atmospheric pressure; The control system controls the feed valve V1 to open, and the raw material in bin A enters bin B through V1 under its own weight; the level gauges L1 and L2 collect the level signal in real time. When the control system detects that the raw material in bin B has reached the preset level, the control system controls V1 to close, thus completing the feeding process of bin B. The control system starts the pressurization unit to fill the B chamber with inert gas or steam; the pressure sensor transmits the pressure signal of the B chamber to the control system in real time until the pressure of the B chamber reaches the set value P1, where P1>P0, and the replacement is qualified, the pressurization unit stops pressurizing. After the pressure in the B chamber stabilizes, the control system opens the discharge valve V2. Since the pressure in the B chamber is higher than the pressure inside the pyrolysis furnace, the raw material enters the pyrolysis furnace smoothly under the action of the pressure difference. During the furnace entry process, the pressure sensor continuously monitors the pressure in the B chamber. If the pressure is lower than the set value P1, the pressurization unit automatically starts to replenish the pressure and maintain the pressure in the B chamber stable. When the level gauge L2 detects that the material level in bin B has reached a low level, the system automatically enters the next cycle of feeding and pressurization replacement process to achieve continuous operation and ensure continuous material supply to the pyrolysis furnace. If the detection unit detects faults such as abnormal pressure or abnormal material level signal, the control system will immediately issue an alarm signal and simultaneously close the relevant valves to prevent gas leakage or equipment damage. Operators can view the fault information through the system and take targeted measures.

[0016] This invention provides a dual-compartment, dual-valve inert gas pressurization and sealing system for feeding a pyrolysis furnace. It offers the following advantages: 1. This invention effectively ensures continuous feeding of the pyrolysis furnace by connecting the A and B chambers in series and using a cyclical working mode of feeding, pressurizing and discharging, reducing the escape of gas from the furnace top, preventing personnel from being poisoned by gas, and preventing air from entering the furnace, thus effectively improving the quality of the gas.

[0017] 2. This invention uses nitrogen pressurization and replacement technology, and through closed-loop pressure control, the pressure in the chamber is always higher than the pressure inside the pyrolysis furnace, forming an effective sealing barrier to prevent gas leakage inside the furnace and improve production safety.

[0018] 3. The core valve of this invention is a valve with good sealing, and the rest of the structure is based on the optimization and modification of existing devices to adapt to harsh working conditions and extend the service life of the equipment.

[0019] 4. The control system of this invention, with PLC as its core, realizes fully automated control of valve opening and closing, pressurization, pressure regulation and abnormal handling. It also has human-machine interaction and system interlocking functions, reducing the labor intensity of operators and improving the stability of system operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the process of a dual-compartment, dual-valve inert gas pressurization and sealing system for feeding a pyrolysis furnace according to the present invention.

[0021] Among them, 1. A bin; 2. B bin; 3. Feed valve V1; 4. Discharge valve V2; 5. Pressurization system; 6. Pressure regulating valve; 7. Flow meter; 8. Check valve; 9. Intermediate bin pressure sensor; 10. Level gauge L1; 11. Level gauge L2; 12. Flow regulating valve. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 The feeding silo unit includes silo A1 and silo B2 connected in series. Silo A1 and silo B2 are sealed together by a flange structure. The connection is sealed with a high-temperature resistant gasket to prevent gas leakage. Except for the inlet and outlet valves mentioned later, the silo structure of silo A1 and silo B2 is modified based on the existing pyrolysis furnace feeding silo device. The structural strength is enhanced by increasing the wall thickness and optimizing the stress structure of the silo. At the same time, the inner wall of the silo is treated with a wear-resistant coating to adapt to the harsh working conditions such as high temperature and dust during the pyrolysis furnace feeding process and ensure the long-term stable operation of the silo.

[0024] A level gauge L3 (9) is installed on silo A1. The level gauge L3 (9) is a high-temperature dust level gauge of the same type as level gauges L1 and L2. Its installation position is close to the lower discharge port of silo A1. It is used to monitor the remaining amount of raw materials in silo A1 in real time and provide data reference for operators to replenish raw materials. A pressure relief port is provided on the upper side wall of silo B2. The pressure relief port is connected to a pressure relief valve through a connecting pipe. The connecting pipe is made of stainless steel and has the characteristics of high temperature resistance and corrosion resistance. The other end of the pressure relief valve is connected to a VOC desulfurization system through a connecting pipe. S The system is connected, and when the pressure inside compartment B2 exceeds the safety threshold due to abnormal conditions, the pressure relief valve automatically opens, directing the excess gas into the VOC outlet. S The system processes the gas to prevent direct emissions that could cause environmental pollution or safety hazards.

[0025] The valve unit includes a feed valve V1 (3) and a discharge valve V2 (4). The feed valve V1 (3) is fixedly installed at the connecting flange between A bin 1 and B bin 2. Its inlet is sealed to the discharge port of A bin 1 and its outlet is sealed to the feed port of B bin 2. It is used to precisely control the flow of raw materials from A bin 1 to B bin 2. The discharge valve V2 (4) is fixedly installed at the bottom discharge port of B bin 2. Its outlet is sealed to the feed port of the pyrolysis furnace through a special connecting pipe to realize the raw material transportation between B bin 2 and the pyrolysis furnace.

[0026] Both the feed valve V1 (3) and the discharge valve V2 (4) are hard-seal valves with good wear resistance and sealing performance. The sealing surface of the valve is made of hard alloy material through precision machining. The hard alloy material has a hardness ≥ HRC60 and has excellent high temperature resistance, wear resistance and corrosion resistance. It can effectively resist friction loss and high temperature environment erosion during the raw material transportation process and extend the service life of the valve. At the same time, the valve stem and valve seat adopt a multi-seal structure design to further improve the sealing reliability of the valve and prevent gas from leaking from the valve stem gap.

[0027] The pressurization unit includes a storage tank, a precision pressure regulating valve 6, a high-precision flow meter 7, a one-way valve 8, and a flow regulating valve 12. The storage tank is a high-pressure inert gas storage tank. When the pressurization medium is steam, a steam storage tank is selected. The outlet of the storage tank is connected to the pressurization port of B chamber 2 through the main connecting pipeline. The pressurization port is located in the middle of the side wall of B chamber 2 to ensure that the pressurization medium can be evenly diffused into the interior of B chamber 2.

[0028] Precision pressure regulating valve 6, flow regulating valve 12, high-precision flow meter 7, and check valve 8 are sequentially connected in series on the main connecting pipeline along the direction of medium flow. The components are sealed together by flanges or compression fittings to ensure the sealing of the pipeline connection. Among them, the precision pressure regulating valve 6 is a pilot-operated precision pressure regulating valve with an accuracy class of ≤±0.5%FS, which can accurately regulate the output pressure and ensure that the pressure in B chamber 2 is controlled within the set range. The high-precision flow meter 7 is a mass flow meter with a measurement accuracy of ≤±1.0%FS, which can accurately feed back the flow data of the pressurizing medium in real time and transmit the data to the control system. The flow regulating valve 12 is an electric regulating ball valve, which is electrically connected to the control system via a cable. It can adjust the valve opening in real time according to the instructions of the control system, thereby controlling the flow of the pressurizing medium. The check valve 8 is a lift-type check valve, which is installed in the same direction as the flow direction of the pressurizing medium. It is used to prevent gas or raw materials in B chamber 2 from flowing back into the pipeline and storage tank of the pressurizing unit, ensuring the safe and stable operation of the pressurizing unit.

[0029] The detection unit includes a pressure sensor 9, a level gauge L1 (10), and a level gauge L2 (11). The pressure sensor 9 is fixedly installed in the middle of the cavity side wall of the B chamber 2 by a special mounting base. The mounting base and the chamber body are sealed with a sealing gasket. The detection probe of the pressure sensor 9 extends into the interior of the B chamber 2. Its measurement range covers the pressure inside the pyrolysis furnace up to 1.5 times the set charging pressure. The measurement accuracy is ≤ ±0.25%FS. It is used to monitor the pressure data in the B chamber 2 in real time and convert the pressure signal into an electrical signal and transmit it to the control system.

[0030] The level gauge L1 (10) is fixedly installed on the upper inner wall of the B bin 2 by a mounting bracket. Its installation height corresponds to the preset high level of the material in the B bin 2. It is used to detect whether the raw material in the B bin 2 has reached the high level threshold. The level gauge L2 (11) is also fixedly installed on the lower inner wall of the B bin 2 by a mounting bracket. Its installation height corresponds to the preset low level of the material in the B bin 2. It is used to detect whether the raw material in the B bin 2 has reached the low level threshold. Both the level gauge L1 (10) and the level gauge L2 (11) are selected as high temperature dust resistant radio frequency admittance level gauges. This type of level gauge is not affected by high temperature, dust and raw material humidity. It has high measurement accuracy and strong stability, which can ensure the accuracy of material level detection under harsh working conditions. Its output signal is directly transmitted to the control system to provide trigger signal for valve switching and cyclic operation.

[0031] The control system adopts a PLC controller, which is equipped with a dedicated analog input module, digital input or output module and human-machine interface touch screen. The analog input module is used to receive analog signals transmitted by pressure sensor 9, high-precision flow meter 7 and each level gauge. The digital output module is electrically connected to the actuators of feed valve V1 (3), discharge valve V2 (4), precision pressure regulating valve 6, flow regulating valve 12 and pressure relief valve through relays to realize the switching control and regulation of each valve. The human-machine interface touch screen is installed on the operating table in the control room. The operator can set the charging pressure set value P1, P1> the pressure inside the pyrolysis furnace P0, the preset material level of B bin, the feeding cycle and other operating parameters through the touch screen. At the same time, the operator can view the operating status, detection data and fault alarm information of each component of the system in real time.

[0032] The control system is interlocked with the existing operating system of the pyrolysis furnace through a communication interface. It can receive start / stop signals and pressure signals from the existing operating system, and simultaneously feed back the operating status signals of this sealing system to the existing operating system, ensuring the coordinated operation of the entire pyrolysis unit. The control system has a built-in pressure closed-loop control program. By comparing the actual pressure in chamber B 2 detected by pressure sensor 9 with the set pressure P1 in real time, it automatically adjusts the opening of precision pressure regulating valve 6 and the adjustment range of flow regulating valve 12, so that the pressure in chamber B 2 and related connecting pipelines is always stable higher than the pressure inside the pyrolysis furnace, forming a reliable sealing barrier.

[0033] In addition, the control system is also equipped with an abnormal alarm and emergency shutdown procedure. When the detection unit detects the following abnormal data, the alarm function will be triggered immediately: the pressure sensor 9 detects that the pressure in the B chamber 2 rises suddenly above the set pressure P1 or drops suddenly below the pressure in the pyrolysis furnace P0; the level gauge L110 fails to detect the high level signal for a long time or the level gauge L211 fails to detect the low level signal for a long time; the high-precision flow meter 7 feeds back the pressurized medium flow rate exceeding the threshold of the normal operating range. When the alarm is triggered, the human-machine interactive touch screen displays the fault type and fault location. At the same time, the control system issues an audible and visual alarm signal and automatically performs an emergency shutdown operation: the feed valve V1 (3), the discharge valve V2 (4) and the precision pressure regulating valve 6 are immediately closed. If the pressure continues to be abnormal, the pressure relief valve is automatically opened to relieve pressure and prevent gas leakage or equipment damage.

[0034] Initial state: Feed valve V1 (3), discharge valve V2 (4), precision pressure regulating valve 6, flow regulating valve 12 and pressure relief valve are all closed. Sufficient raw materials are stored in bin A1. The level gauge L3 (9) monitors the level of bin A1 in real time. The pressure in bin B2 and each connecting pipeline is consistent with atmospheric pressure. After the control system is powered on, it automatically completes the self-inspection of each detection unit and actuator. After the self-inspection is qualified, it enters the standby state and waits for the running command.

[0035] B-bin feeding stage: After the operator sets the charging pressure P1, preset high level and low level of B-bin through the human-machine interaction touch screen, click the start button and the system enters the running state. The control system controls the feeding valve V1 (3) to open slowly. The raw material in A-bin 1 falls smoothly into B-bin 2 through the feeding valve V1 (3) under its own weight. During this process, the level gauge L1 (10) and the level gauge L2 (11) collect the level signal in B-bin 2 in real time and transmit it to the control system. The level gauge L3 (9) monitors the level in A-bin 1 at the same time. If the level in A-bin 1 is lower than the preset replenishment threshold, the control system prompts the operator to replenish the raw material on the touch screen. When the level gauge L1 (10) detects that the raw material in B-bin 2 has reached the preset high level, the control system immediately issues an instruction to control the feeding valve V1 (3) to close, and completes the B-bin feeding process.

[0036] After the feed valve V1 (3) is closed and the seal is confirmed, the control system automatically starts the pressurization unit and controls the precision pressure regulating valve 6 and the flow regulating valve 12 to open at the preset opening. The pressurization medium in the storage tank, in this embodiment, is nitrogen. After the pressure is regulated by the precision pressure regulating valve 6 and the flow is regulated by the flow regulating valve 12, it is measured by the high-precision flow meter 7 and then enters the B chamber 2 through the one-way valve 8. The pressure sensor 9 transmits the pressure signal in the B chamber 2 to the control system in real time. The control system dynamically adjusts the opening of the precision pressure regulating valve 6 and the flow regulating valve 12 through the pressure closed-loop control logic to ensure that the pressurization medium is smoothly filled. When the pressure in the B chamber 2 reaches the set value P1 and the cumulative filling amount fed back by the high-precision flow meter 7 reaches the preset replacement amount, ensuring that the air in the B chamber 2 is completely replaced, the control system controls the precision pressure regulating valve 6 and the flow regulating valve 12 to close, the pressurization unit stops pressurizing, and the pressurization replacement process is completed.

[0037] In the furnace feeding stage: After the pressurization and replacement are completed, the control system delays for 3-5 seconds to ensure that the pressure in B chamber 2 is stable. Then, the discharge valve V2 (4) is slowly opened. Since the pressure P1 in B chamber 2 is higher than the pressure P0 in the pyrolysis furnace, the raw material in B chamber 2 enters the pyrolysis furnace smoothly and evenly through the discharge valve V24 under the action of the pressure difference. During the process of raw material entering the furnace, the pressure sensor 9 continuously monitors the pressure in B chamber 2. If the pressure is lower than the set value P1 due to the falling of raw material, slight leakage, etc., the control system automatically starts the pressure replenishment program, controls the precision pressure regulating valve 6 and the flow regulating valve 12 to open again, and replenishes the pressurizing medium in B chamber 2 until the pressure is restored to the set value P1. Then, the valve is closed to maintain the pressure in B chamber 2 and ensure the sealing effect.

[0038] Cyclic operation stage: As raw materials continue to enter the pyrolysis furnace, the material level in bin B2 gradually decreases. When the material level gauge L2 (11) detects that the material level in bin B2 has reached the preset low level, the control system immediately controls the discharge valve V2 (4) to close. Then it automatically returns to the feeding stage of bin B and starts the next round of feeding, pressurization replacement and in-furnace feeding process to realize the continuous cyclic operation of the system and ensure the continuous supply of materials to the pyrolysis furnace.

[0039] Abnormal Handling Stage: If the control system detects abnormal data at any of the above stages, it will immediately trigger an audible and visual alarm signal, display fault information on the human-machine interface touch screen, and at the same time, the control system will perform an emergency shutdown operation, controlling the feed valve V1 (3), discharge valve V2 (4) and precision pressure regulating valve 6 to close quickly. If the pressure in chamber B2 is higher than the safety threshold, the pressure relief valve will automatically open to introduce gas into the VOC. S After receiving an alarm, the operator can view the fault type and location via the touchscreen and perform targeted troubleshooting. After the fault is resolved, the operator can reset the alarm signal via the touchscreen, and the system can restart and enter the operating state.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-compartment, dual-valve inert gas pressurization and sealing system for a pyrolysis furnace feed, characterized in that, It includes a feeding hopper unit, valve unit, pressurization unit, detection unit, control system, and connecting pipelines; The feeding bin unit includes bin A (1) and bin B (2) arranged in series; The valve unit includes a feed valve V1 (3) and a discharge valve V2 (4). The feed valve V1 (3) is used to control the raw material to enter the B chamber (2) from the A chamber (1). The discharge valve V2 (4) is connected to the feed port of the pyrolysis furnace. The pressurization unit is connected to chamber B (2) and is used to pressurize chamber B (2) with a pressurization medium, which includes an inert gas or vapor. The detection unit is used to monitor the pressure data and material level data in the B compartment (2); The control system is connected to the feed valve V1 (3), the discharge valve V2 (4), the pressurization unit and the detection unit for automated control.

2. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The feed valve V1 (3) and the discharge valve V2 (4) are both valves with good wear resistance and sealing performance. The sealing surfaces of the feed valve V1 (3) and the discharge valve V2 (4) are made of hard alloy material.

3. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The pressurization unit includes a storage tank, a pressure regulating valve (6), a flow meter (7), and a check valve (8). The storage tank is connected to the B compartment (2) via a connecting pipeline. The pressure regulating valve (6), the flow meter (7), and the check valve (8) are connected in series on the connecting pipeline.

4. The dual-compartment, dual-valve inert gas pressurization and sealing system for a pyrolysis furnace feed according to claim 3, characterized in that: The pressure regulating valve (6) is a precision pressure regulating valve, the flow meter (7) is a high-precision flow meter, and a flow regulating valve (12) is also provided on the connecting pipeline. The flow regulating valve (12) is electrically connected to the control system.

5. The pyrolysis furnace feeding double-compartment double-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The detection unit includes a pressure sensor (9), a level gauge L1 (10) and a level gauge L2 (11). The pressure sensor (9) is installed on the cavity of the B chamber (2), the level gauge L1 (10) is installed on the upper part of the B chamber (2), and the level gauge L2 (11) is installed on the lower part of the B chamber (2).

6. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 5, characterized in that: Both the level gauges L1 (10) and L2 (11) are high-temperature dust level gauges.

7. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The control system adopts any one of a programmable logic controller, such as a PLC, PAC, or DCS.

8. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 7, characterized in that: The control system adopts pressure closed-loop control logic to make the pressure of B chamber (2) and related cavities higher than the pressure inside the pyrolysis furnace.

9. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The control system has abnormal alarm and emergency shutdown functions. When the detection unit detects abnormal data, it can issue an alarm signal and control the feed valve V1 (3), discharge valve V2 (4) and pressure regulating valve (6) of the pressurization unit to close.

10. The pyrolysis furnace feeding dual-compartment dual-valve inert gas pressurization and sealing system according to claim 1, characterized in that: The A bin (1) is equipped with a level gauge L3 (9), and the B bin (2) is equipped with a pressure relief valve to protect the device in case of overpressure or abnormal conditions. The pressure relief valve is connected to the VOC level gauge. S System connection.

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