Coke oven riser capping safety voltage ignition device

Abstract

The invention relates to the technical field of coke oven equipment, in particular to a safety voltage ignition device for capping of a coke oven riser. According to the technical scheme, the device comprises a dynamic safety voltage ignition unit, a tar removing device and a capping pressure dual-redundancy triggering unit, the dynamic safety voltage ignition unit comprises a high-temperature-resistant ignition core, a dynamic voltage adjusting module and a dual-insulation shell, and the dynamic voltage adjusting module comprises a temperature sensor, a humidity sensor and an insulation resistance detector; the tar removing device comprises an ultrasonic oscillator and a high-temperature burning ring, the ultrasonic oscillator is arranged around the high-temperature-resistant ignition core, the high-temperature burning ring is arranged at the top end of the high-temperature-resistant ignition core, and the high-temperature burning ring can be synchronously heated to 900 DEG C or above by the high-temperature-resistant ignition core. Tar on the surface of the ignition core can be rapidly removed, secondary pollution is avoided through cooperation of the tar guide cover and the collecting tank, the ignition success rate is stabilized to be 98% or above, and the problem that an existing device frequently loses efficacy due to tar accumulation is solved.

Description

Technical Field

[0001] This invention relates to the field of coke oven equipment technology, and in particular to a safe voltage ignition device for opening the cover of a coke oven riser pipe. Background Technology

[0002] The coke oven riser pipe is a core component for the extraction of raw coal gas. During operations such as pushing coke and charging coal, the riser pipe cover needs to be opened frequently, at which time the raw coal gas will overflow instantly. If it is not ignited in time, it will not only release toxic substances such as benzene and hydrogen sulfide, polluting the environment, but may also cause an explosion if the gas concentration reaches the standard. Therefore, a safe voltage ignition device is a key piece of equipment for the cover-opening operation.

[0003] However, existing equipment suffers from significant technical defects due to the harsh environment of the coke oven roof, characterized by high temperature, high humidity, high tar content, and strong corrosion: First, the fixed safety voltage leads to poor adaptability. The commonly used fixed voltage of 12V or 36V results in decreased cable insulation performance under high temperature and humidity, increasing the risk of leakage and electric shock to workers. At low temperatures, the ignition core heats up slowly, with an ignition delay of 2-3 seconds, causing a large amount of raw coal gas to escape. Second, tar accumulation causes ignition failure. Tar in the raw coal gas easily adheres to the ignition core. Existing equipment relies solely on the passive burning of the ignition core at high temperatures, causing tar accumulation to far exceed the burning rate, forming a coke layer within 1-2 weeks. This reduces the ignition success rate to below 60%, requiring manual disassembly and cleaning, which is time-consuming and requires limited space, impacting production. Third, the ignition trigger is singular, lacking redundant protection. It relies heavily on the mechanical limit switch of the riser cover for triggering, but the switch is prone to failure due to tar jamming, with a monthly failure rate of 15%-20%; when the gas collecting pipe pressure suddenly rises and causes the cover to "burst open", there is no pressure triggering mechanism, and it cannot be ignited in time, resulting in a high risk of raw coal gas leakage. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a safe voltage ignition device for the coke oven riser pipe.

[0005] The technical solution of the present invention: a safe voltage ignition device for opening the cover of a coke oven riser pipe, comprising a dynamic safe voltage ignition unit, a tar removal device, and a dual redundant triggering unit for opening the cover pressure;

[0006] The dynamic safety voltage ignition unit includes a high-temperature resistant ignition core, a dynamic voltage regulation module, and a double-insulated shell. The dynamic voltage regulation module includes a temperature sensor, a humidity sensor, and an insulation resistance detector.

[0007] The tar removal device includes an ultrasonic oscillator and a high-temperature burning ring. The ultrasonic oscillator is arranged around the high-temperature ignition core, and the high-temperature burning ring is set on the top of the high-temperature ignition core. The high-temperature burning ring can be synchronously heated to 900°C and above by the high-temperature ignition core. When the temperature sensor detects that the surface temperature of the high-temperature ignition core is lower than 800°C, the ultrasonic oscillator is triggered to start.

[0008] The dual-redundant triggering unit for the cover opening pressure includes a mechanical displacement sensor for the riser cover, a pressure transmitter for the gas collecting pipe, and a PLC controller. When the mechanical displacement sensor for the riser cover detects that the opening angle of the riser cover is greater than 10°, it triggers the dynamic safety voltage ignition unit to start. When the pressure transmitter for the gas collecting pipe detects that the pressure in the gas collecting pipe is greater than 1500Pa, it triggers the dynamic safety voltage ignition unit to start.

[0009] Preferably, the temperature sensor has a detection range of -20℃ to 400℃, the humidity sensor has a detection range of 0 to 100%RH, the insulation resistance detector has a detection range of 0 to 500MΩ, and the dynamic voltage adjustment module can output a safe DC voltage of 8V to 12V in real time according to the collected parameters.

[0010] Preferably, the voltage regulation logic of the dynamic voltage regulation module is as follows: when the ambient temperature detected by the temperature sensor is greater than 300°C and the ambient humidity detected by the humidity sensor is greater than 80%RH, the dynamic voltage regulation module automatically reduces the output voltage to 8V; when the ambient temperature detected by the temperature sensor is 300°C or below, the ambient humidity detected by the humidity sensor is 80%RH or below, and the insulation resistance detected by the insulation resistance detector is 100MΩ or above, the dynamic voltage regulation module automatically increases the output voltage to 12V.

[0011] Preferably, the dynamic safety voltage ignition unit further includes an ignition status feedback module, which includes an infrared flame detector. When the infrared flame detector does not detect a flame within 3 seconds, the ignition status feedback module triggers the dynamic voltage adjustment module to fine-tune the output voltage by ±0.5V and controls the dynamic safety voltage ignition unit to restart ignition.

[0012] Preferably, the oscillation frequency of the ultrasonic oscillator is 20kHz to 40kHz, the detection range of the riser cover mechanical displacement sensor is 0 to 90° of the riser cover opening angle, and the detection range of the gas collecting pipe pressure transmitter is 0 to 3000Pa of the gas collecting pipe pressure.

[0013] Preferably, the tar removal device further includes a tar guide shroud, which surrounds the high-temperature ignition core. The tar guide shroud has an inclination angle of 35° to 45°, and the inner surface of the tar guide shroud is coated with a polytetrafluoroethylene anti-stick coating. A tar collection tank is provided at the bottom of the tar guide shroud.

[0014] Preferably, the voltage ignition device further includes an anti-corrosion protection device, which includes a bracket, a multi-layer protective cable, and a junction box. The bracket is provided with a sealed cable tray, which is filled with high-temperature resistant silicone sealant. The multi-layer protective cable consists of an inner oil-resistant cross-linked polyethylene insulation layer, a middle copper mesh shielding layer, and an outer expandable graphite fireproof sleeve. The junction box is equipped with a fluororubber sealing gasket.

[0015] Compared with existing technologies, the beneficial effects of this invention are:

[0016] 1. The dual redundant trigger unit for cap opening pressure can cover both active cap opening and pressure cap popping scenarios, avoiding gas leakage caused by single trigger failure; the dynamic voltage adjustment module combines temperature, humidity and insulation detection parameters to adapt to 8V-12V voltage in real time, completely eliminating the risk of electric shock to operators, while avoiding the risk of explosion caused by low temperature ignition delay.

[0017] 2. Enhanced ignition reliability and environmental adaptability: The tar removal device provides both vibration and high-temperature effects, quickly removing tar from the ignition core surface. Combined with the tar guide shroud and collection tank, secondary pollution is avoided, ensuring a stable ignition success rate of over 98%. This solves the problem of frequent failures caused by tar accumulation in existing devices. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the dynamic safety voltage ignition unit of the present invention;

[0020] Figure 3 This is a schematic diagram of the tar removal device of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the dual-redundant trigger unit for capping pressure of the present invention;

[0022] Figure 5 This is a schematic diagram of the anti-corrosion protection device of the present invention.

[0023] Reference numerals: 1. High-temperature ignition core; 2. Dynamic voltage regulation module; 3. Double-insulated outer shell; 4. Temperature sensor; 5. Humidity sensor; 6. Insulation resistance detector; 7. Ultrasonic oscillator; 8. High-temperature burning ring; 9. Mechanical displacement sensor for riser pipe cover; 10. Gas collection pipe pressure transmitter; 12. Riser pipe cover; 13. Gas collection pipe; 15. Infrared flame detector; 16. Tar guide shroud; 17. PTFE anti-stick coating; 18. Tar collection tank; 19. Bracket; 20. Multi-layer protective cable; 21. Junction box; 22. Sealed cable tray; 23. High-temperature resistant silicone sealant; 24. Oil-resistant cross-linked polyethylene insulation layer; 25. Copper mesh shielding layer; 26. Expandable graphite fireproof sleeve; 27. Fluororubber sealing gasket. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] See attached document Figures 1-5 A coke oven riser pipe cover opening safety voltage ignition device includes a dynamic safety voltage ignition unit 100, a tar removal device 200, and a cover opening pressure dual redundant triggering unit 300.

[0026] The dynamic safety voltage ignition unit includes a high-temperature resistant ignition core 1, a dynamic voltage regulation module 2, and a double-insulated shell 3. The dynamic voltage regulation module 2 includes a temperature sensor 4, a humidity sensor 5, and an insulation resistance detector 6.

[0027] The tar removal device includes an ultrasonic oscillator 7 and a high-temperature burning ring 8. The ultrasonic oscillator 7 is arranged around the high-temperature resistant ignition core 1, and the high-temperature burning ring 8 is arranged on the top of the high-temperature resistant ignition core 1. The high-temperature burning ring 8 can be synchronously heated to 900°C and above by the high-temperature resistant ignition core 1. When the temperature sensor 4 detects that the surface temperature of the high-temperature resistant ignition core 1 is lower than 800°C, the ultrasonic oscillator 7 is triggered to start.

[0028] The dual-redundant triggering unit for the cover opening pressure includes a mechanical displacement sensor 9 for the riser cover, a pressure transmitter 10 for the gas collecting pipe, and a PLC controller. When the mechanical displacement sensor 9 detects that the opening angle of the riser cover 12 is greater than 10°, the dynamic safety voltage ignition unit is triggered to start. When the pressure transmitter 10 detects that the pressure of the gas collecting pipe 13 is greater than 1500Pa, the dynamic safety voltage ignition unit is triggered to start.

[0029] Specifically, the temperature sensor 4 has a detection range of -20℃ to 400℃, the humidity sensor 5 has a detection range of 0 to 100%RH, and the insulation resistance detector 6 has a detection range of 0 to 500MΩ. The dynamic voltage regulation module 2 can output a safe DC voltage of 8V to 12V in real time according to the collected parameters. The voltage regulation logic of the dynamic voltage regulation module 2 is as follows: when the ambient temperature detected by the temperature sensor 4 is greater than 300℃ and the ambient humidity detected by the humidity sensor 5 is greater than 80%RH, the dynamic voltage regulation module 2 automatically reduces the output voltage to 8V; when the ambient temperature detected by the temperature sensor 4 is 300℃ or below, the ambient humidity detected by the humidity sensor 5 is 80%RH or below, and the insulation resistance detected by the insulation resistance detector 6 is 100MΩ or above, the dynamic voltage regulation module 2 automatically increases the output voltage to 12V. Through the above regulation logic, it is ensured that the leakage current of the device under different operating conditions is 0.05mA or below.

[0030] In this embodiment, the dynamic safety voltage ignition unit also includes an ignition status feedback module, which includes an infrared flame detector 15. The detection distance of the infrared flame detector 15 is 0.5 meters to 1 meter. The infrared flame detector 15 is used to detect the ignition effect of the high-temperature resistant ignition core 1 in real time. When the infrared flame detector 15 does not detect a flame within 3 seconds, the ignition status feedback module triggers the dynamic voltage adjustment module 2 to fine-tune the output voltage by ±0.5V and controls the dynamic safety voltage ignition unit to restart ignition.

[0031] Specifically, the ultrasonic oscillator 7 has an oscillation frequency of 20kHz to 40kHz, the riser cover mechanical displacement sensor 9 has a detection range of 0 to 90° for the opening and closing angle of the riser cover 12, the gas collecting pipe pressure transmitter 10 has a detection range of 0 to 3000Pa for the pressure of the gas collecting pipe 13, and the tar removal device also includes a tar guide shroud 16. The tar guide shroud 16 is arranged around the high-temperature ignition core 1. The tar guide shroud 16 has an inclination angle of 35° to 45°. The inner surface of the tar guide shroud 16 is coated with a polytetrafluoroethylene anti-stick coating 17. The bottom of the tar guide shroud 16 is provided with a tar collection tank 18, which is used to collect the tar that slides down from the tar guide shroud 16 to avoid secondary pollution of the high-temperature ignition core 1 by the tar after removal.

[0032] It should also be noted that the voltage ignition device also includes an anti-corrosion protection device 400, which includes a bracket 19, a multi-layer protective cable 20, and a junction box 21. The bracket 19 is provided with a sealed cable tray 22, which is filled with high-temperature resistant silicone sealant 23. The multi-layer protective cable 20 consists of an inner oil-resistant cross-linked polyethylene insulation layer 24, a middle copper mesh shielding layer 25, and an outer expandable graphite fireproof sleeve 26. The junction box 21 is equipped with a fluororubber sealing gasket 27.

[0033] In this embodiment, the inner layer of the multi-layer protective cable has an oil-resistant cross-linked polyethylene insulation layer with a temperature resistance of 300℃ or higher and a thickness of 1.2mm or higher; the middle layer of the multi-layer protective cable has a copper mesh shielding layer with a shielding effectiveness of 80dB or higher, which can isolate electromagnetic interference in the coke oven environment; the outer layer of the multi-layer protective cable has an expandable graphite fireproof sleeve with an original thickness of 2mm to 3mm, ensuring good flexibility and protection in the unexpanded state; the sealed cable tray of the bracket has a tray width of 15mm to 20mm and a tray depth of 10mm to 15mm; the high-temperature resistant silicone sealant filled in the sealed cable tray has a temperature resistance of 300℃ or higher, and the filling thickness of the high-temperature resistant silicone sealant is consistent with the tray depth; the bracket adopts a plug-in threaded fixing structure, equipped with threads of M8 to M10, and is suitable for riser pipe diameters ranging from 300mm to 500mm, and the disassembly process does not affect other inspection and maintenance operations of the riser pipe.

[0034] In this invention, once the entire device is installed, the anti-corrosion protection device 400 is in a continuous protection state: the bracket 19 forms a sealed protection for the multi-layer protective cable 20 through the high-temperature resistant silicone sealant 23 in the sealed cable tray 22, preventing the intrusion of tar and acidic gases in the coke oven environment; the inner oil-resistant cross-linked polyethylene insulation layer 24, the middle copper mesh shielding layer 25, and the outer expandable graphite fireproof sleeve 26 of the multi-layer protective cable 20 respectively achieve insulation, anti-interference, and fire protection; the fluororubber sealing gasket 27 of the junction box 21 seals the box interface, and the double insulating shell 3 of the dynamic safety voltage ignition unit wraps the high-temperature resistant ignition core 1 and the dynamic voltage adjustment module 2, ensuring that each component is in a ready-to-work state adapted to the high temperature and corrosive environment of the coke oven.

[0035] When the coke oven is preparing to perform the ascension pipe capping operation, the dual-redundant triggering unit for capping pressure is activated for detection: when the operator opens the ascension pipe cap 12, the mechanical displacement sensor 9 of the ascension pipe cap detects the opening and closing angle of the cap in real time. When the angle is greater than 10°, the mechanical displacement sensor 9 of the ascension pipe cap sends a trigger signal to the PLC controller; when the gas collecting pipe 13 experiences pressure abnormality due to fan failure or other reasons, the gas collecting pipe pressure transmitter 10 detects the gas collecting pipe pressure. When the pressure is greater than 1500Pa, the gas collecting pipe pressure transmitter 10 also sends a trigger signal to the PLC controller; after any of the above signals are triggered, the PLC controller immediately outputs a "start command" to the dynamic safety voltage ignition unit to realize redundant triggering of the "capping action" or "pressure abnormality" scenarios.

[0036] After receiving the start command through the dynamic voltage adjustment module 2, the dynamic safety voltage ignition unit 100 adjusts the output voltage in real time based on environmental parameters: temperature sensor 4 (detection range -20℃-400℃), humidity sensor 5 (detection range 0-100%RH), and insulation resistance detector 6 (detection range 0-500MΩ) simultaneously collect environmental parameters of the coke oven riser pipe area; if the temperature is >300℃ and the humidity is >80%RH, it is a high temperature and high humidity condition, and the dynamic voltage adjustment module 2 automatically reduces the output voltage to 8V to avoid leakage caused by the deterioration of cable insulation performance; if the temperature is ≤300℃, the humidity is ≤80%RH, and the insulation resistance is ≥100MΩ, it is a normal operating condition, and the module 2 increases the output voltage to 12V to ensure rapid heating of the high temperature ignition core 1;

[0037] After receiving the adjusted safety voltage, the high-temperature ignition core 1 starts ignition. At the same time, the ignition status feedback module monitors the ignition effect in real time: after being powered on, the high-temperature ignition core 1 heats up rapidly, and the high-temperature burning ring 8 at its top is simultaneously heated to 900°C or above, igniting the raw coal gas overflowing after the riser cover 12 is opened; the infrared flame detector 15, with a detection distance of 0.5m-1m, is aimed at the flame area at the top of the ignition core 1. If no effective flame is detected within 3 seconds, or if carbon buildup on the ignition core causes ignition failure, the detector 15 sends an "ignition abnormality" signal to the ignition status feedback module; after receiving the signal, the module triggers the dynamic voltage adjustment module 2 to fine-tune the output voltage by ±0.5V. If the voltage is too low, it is increased to ensure the heating efficiency of the ignition core. At the same time, it controls the high-temperature ignition core 1 to restart ignition until a flame is detected or 3 retries are completed to avoid invalid dry burning.

[0038] During ignition, the tar removal device is activated simultaneously to prevent tar adhesion from affecting ignition efficiency: Temperature sensor 4 monitors the surface temperature of the high-temperature resistant ignition core 1 in real time. When the temperature is below 800℃, the temperature range where tar easily adheres, sensor 4 triggers the ultrasonic oscillator 7 to start. The ultrasonic oscillator 7 has an oscillation frequency of 20kHz-40kHz, generating high-frequency oscillations around the ignition core 1 to shake off the tar droplets adhering to the surface of the ignition core 1. At the same time, the high-temperature burning ring 8 maintains a high temperature above 900℃ to burn and carbonize the tar that has not been shaken off. The carbonized tar debris falls off under the action of vibration. The fallen tar and carbonized debris are collected by the tar guide shroud 16 and slide down the polytetrafluoroethylene anti-stick coating 17 on the inner surface to the tar collection tank 18 at the bottom, avoiding secondary adhesion to the surface of the ignition core 1.

[0039] Once the coke oven capping operation is completed and the raw coal gas has been discharged, the system automatically enters the reset process after the riser cover 12 is closed: the mechanical displacement sensor 9 of the riser cover detects that the cap closing angle is <10°, and the gas collecting pipe pressure transmitter 10 detects that the pressure of the gas collecting pipe 13 is <1000Pa and has returned to normal. Both send a "operation completed" signal to the PLC controller. After receiving the two signals, the PLC controller controls the dynamic safety voltage ignition unit to stop supplying power to the high-temperature ignition core 1, and at the same time shuts down the ultrasonic oscillator 7 and the high-temperature burning ring 8. If only one signal meets the standard, such as the cap being closed but the pressure still being too high, the PLC controller starts a delay program, delaying for 30s-60s, and performs the closing operation only after both signals meet the standard, to avoid premature ignition stopping and leakage of residual raw coal gas. After the system is shut down, all components return to the initial standby state. The tar collection tank 18 can be manually cleaned periodically to ensure that the cleaning function is normal during the next operation.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safe voltage ignition device for opening the cover of a coke oven riser pipe, characterized in that, Includes a dynamic safety voltage ignition unit, a tar removal device, and a dual-redundant triggering unit for capping pressure; The dynamic safety voltage ignition unit includes a high-temperature resistant ignition core, a dynamic voltage regulation module, and a double-insulated shell. The dynamic voltage regulation module includes a temperature sensor, a humidity sensor, and an insulation resistance detector. The tar removal device includes an ultrasonic oscillator and a high-temperature burning ring. The ultrasonic oscillator is arranged around the high-temperature ignition core, and the high-temperature burning ring is set on the top of the high-temperature ignition core. The high-temperature burning ring can be synchronously heated to 900°C and above by the high-temperature ignition core. When the temperature sensor detects that the surface temperature of the high-temperature ignition core is lower than 800°C, the ultrasonic oscillator is triggered to start. The dual-redundant triggering unit for the cover opening pressure includes a mechanical displacement sensor for the riser cover, a pressure transmitter for the gas collecting pipe, and a PLC controller. When the mechanical displacement sensor for the riser cover detects that the opening angle of the riser cover is greater than 10°, it triggers the dynamic safety voltage ignition unit to start. When the pressure transmitter for the gas collecting pipe detects that the pressure in the gas collecting pipe is greater than 1500Pa, it triggers the dynamic safety voltage ignition unit to start.

2. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 1, characterized in that, The temperature sensor has a detection range of -20℃ to 400℃, the humidity sensor has a detection range of 0 to 100%RH, the insulation resistance detector has a detection range of 0 to 500MΩ, and the dynamic voltage regulation module can output a safe DC voltage of 8V to 12V in real time according to the collected parameters.

3. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 2, characterized in that, The voltage regulation logic of the dynamic voltage regulation module is as follows: when the ambient temperature detected by the temperature sensor is greater than 300℃ and the ambient humidity detected by the humidity sensor is greater than 80%RH, the dynamic voltage regulation module automatically reduces the output voltage to 8V; when the ambient temperature detected by the temperature sensor is 300℃ or below, the ambient humidity detected by the humidity sensor is 80%RH or below, and the insulation resistance detected by the insulation resistance detector is 100MΩ or above, the dynamic voltage regulation module automatically increases the output voltage to 12V.

4. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 3, characterized in that, The dynamic safety voltage ignition unit also includes an ignition status feedback module, which includes an infrared flame detector.

5. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 4, characterized in that, If the infrared flame detector does not detect a flame within 3 seconds, the ignition status feedback module triggers the dynamic voltage adjustment module to fine-tune the output voltage by ±0.5V and controls the dynamic safety voltage ignition unit to restart ignition.

6. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 1, characterized in that, The ultrasonic oscillator has an oscillation frequency of 20kHz to 40kHz, the riser cover mechanical displacement sensor has a detection range of 0 to 90° for the riser cover opening angle, and the gas collecting pipe pressure transmitter has a detection range of 0 to 3000Pa for the gas collecting pipe pressure.

7. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 6, characterized in that, The tar removal device also includes a tar guide shroud, which surrounds the high-temperature ignition core and has an inclination angle of 35° to 45°.

8. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 6, characterized in that, The inner surface of the tar deflector is coated with a polytetrafluoroethylene anti-stick coating, and a tar collection tank is provided at the bottom of the tar deflector.

9. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 1, characterized in that, The voltage ignition device also includes an anti-corrosion protection device, which includes a bracket, a multi-layer protective cable and a junction box. The bracket is equipped with a sealed cable tray.

10. A safe voltage ignition device for opening the cover of a coke oven riser pipe according to claim 9, characterized in that, The sealed cable tray is filled with high-temperature resistant silicone sealant. The multi-layer protective cable consists of an inner oil-resistant cross-linked polyethylene insulation layer, a middle copper mesh shielding layer, and an outer expandable graphite fireproof sleeve. The junction box is equipped with a fluororubber sealing gasket.

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