Two-section type incandescent light ignition device

Abstract

The invention discloses a two-section type incandescent light ignition device, which relates to the technical field of torch burner ignition, and comprises: a small flame ignition system, which comprises a natural gas mixing connecting pipe and a small flame closed venturi connected with each other; the low-flame natural gas pipe is connected with a low-flame air pipeline; the big flame ignition system comprises a direct combustion type big flame ignition system and a mixed type big flame ignition system, and the two ignition systems are alternately matched with the small flame ignition system for use; the mixed big flame ignition system comprises a big flame waste gas mixing pipe and a big flame closed venturi which are connected with each other; the connecting pipe and the mixing pipe extend into the incandescent light burner; the small flame closed venturi and the big flame closed venturi are arranged outside the windproof wall or the radiation-proof wall; the big flame closed venturi is also connected with a big flame waste gas pipe and a big flame air pipeline; and the control unit is in control connection with the small flame ignition system and the large flame ignition system.

Description

Technical Field

[0001] The invention belongs to the technical field of torch burner ignition, and more specifically, relates to a two-stage ever-burning lamp ignition device. Background Art

[0002] Petrochemical, coal chemical and other chemical plants generate a large amount of flammable and harmful waste gas during the production process. The flammable and harmful gas needs to be passed through the ground flare device; the waste gas is discharged into the atmosphere after combustion treatment. The permanent lamp currently used is burned for a long time. As the ignition source of the torch burner, the combustion gas source of the permanent lamp uses natural gas and liquefied petroleum gas. The annual consumption is very large, and the annual energy consumption capital cost of a large-scale oil refinery and coal chemical plant is very high. During use, the equipment storage and transportation operation status cannot be online for inspection and maintenance. Summary of the invention

[0003] The purpose of the present invention is to provide a two-stage ever-burning lamp ignition device in response to the deficiencies in the prior art. Only three connection ports are arranged on the small flame closed venturi. The small flame closed venturi is respectively connected to the natural gas mixing connection pipe, the small flame natural gas pipe and the small flame air duct. The small flame ignition system maintains stable combustion to ensure that the ever-burning lamp remains in a burning state. The exhaust gas generated by the factory is used as a supplementary gas source for the ever-burning lamp through a direct-burning large flame ignition system and a hybrid large flame ignition system. According to signal conditions such as wind speed and device emissions, the system controls the opening and closing of the direct-burning large flame ignition system and the hybrid large flame ignition system to ensure that the above-mentioned ignition device burns stably. According to the exhaust gas flow and air flow of the combustion device set by the system, the above-mentioned large flame system burns stably and is discharged after combustion. The small flame closed venturi and the large flame closed venturi are arranged outside the windbreak wall and the radiation protection wall, which is convenient for adjusting the air intake of the ever-burning lamp and can also perform online inspection and maintenance of the equipment.

[0004] In order to achieve the above object, the present invention provides a two-stage ever-burning lamp ignition device, comprising:

[0005] A small flame ignition system includes a natural gas mixing connecting pipe and a small flame closed venturi, wherein the upper end of the natural gas mixing connecting pipe extends into the combustion chamber of the pilot lamp, and the lower end of the natural gas mixing connecting pipe is connected to the small flame closed venturi, and the small flame closed venturi is arranged outside the windproof wall of the closed ground torch or outside the radiation protection wall of the open ground torch;

[0006] The small flame closed venturi is also connected to a small flame natural gas pipe and a small flame air pipe;

[0007] The large flame ignition system includes a direct combustion large flame ignition system and a hybrid large flame ignition system. The direct combustion large flame ignition system and the small flame ignition system are arranged in one of the pilot burner combustion chambers, and the hybrid large flame ignition system and the small flame ignition system are arranged in the other pilot burner combustion chamber;

[0008] The hybrid large flame ignition system includes a large flame exhaust gas mixing pipe and a large flame closed venturi. The upper end of the large flame exhaust gas mixing pipe extends into the pilot burner, and the lower end of the large flame exhaust gas mixing pipe is connected to the large flame closed venturi. The large flame closed venturi is arranged outside the windproof wall of the enclosed ground flare or outside the radiation protection wall of the open ground flare;

[0009] The large flame closed venturi is also connected to a large flame exhaust gas pipe and a large flame air pipe;

[0010] The control unit is connected to the small flame ignition system and the large flame ignition system for control.

[0011] Optionally, a small flame natural gas nozzle is arranged at the upper end of the natural gas mixing connection pipe. The direct combustion large flame ignition system includes a direct combustion combustible exhaust gas pipe. The upper end of the direct combustion combustible exhaust gas pipe extends into the pilot burner combustion chamber. A direct combustion nozzle is arranged at the upper end of the direct combustion combustible exhaust gas pipe, and a direct combustion gas nozzle and a porous plate of the large flame direct combustion nozzle are arranged in the direct combustion nozzle.

[0012] Optionally, a small flame natural gas thermocouple is arranged in the natural gas mixing connection pipe, and a large flame thermocouple is arranged in the large flame exhaust gas mixing pipe. The small flame natural gas thermocouple and the large flame thermocouple are connected to the control unit.

[0013] Optionally, the pilot burner combustion chamber is also communicated with a direct combustion air pipe. The direct combustion air pipe extends outside the windproof wall of the enclosed ground flare or outside the radiation protection wall of the open ground flare. A direct combustion air regulating valve, a direct combustion air flow meter, and a direct combustion explosion-proof one-way air valve connected to the control unit are sequentially arranged on the pipeline.

[0014] Optionally, a large flame exhaust gas nozzle is arranged at the upper end of the large flame exhaust gas mixing pipe, and the large flame exhaust gas nozzle is arranged on the outer periphery of the small flame natural gas nozzle.

[0015] Optionally, a small-flame natural gas regulating valve, a small-flame natural gas flowmeter, a small-flame natural gas shut-off valve, and a small-flame natural gas regulating valve are sequentially arranged on the small-flame natural gas pipe. The small-flame natural gas pipe is connected to the natural gas inlet of the small-flame closed Venturi. The natural gas mixing connection pipe is connected to the first outlet of the small-flame closed Venturi, and a small-flame ignition electrode is arranged in the natural gas mixing connection pipe.

[0016] Optionally, the first air inlet of the small-flame closed Venturi is connected to a small-flame air pipe. A small-flame air regulating valve, a small-flame air flowmeter, and a small-flame air explosion-proof one-way valve are sequentially installed on the small-flame air pipe. The first outlet of the small-flame closed Venturi is connected to the natural gas mixing connection pipe. The small-flame natural gas flowmeter, the small-flame natural gas shut-off valve, the small-flame natural gas regulating valve, the small-flame air regulating valve, the small-flame air flowmeter, and the small-flame ignition electrode are connected to the control unit.

[0017] Optionally, the lower end of the direct combustion combustible waste gas pipe extends outside the windproof wall of the enclosed ground flare or outside the radiation-proof wall of the open ground flare. A direct combustion regulating valve, a direct combustion shut-off valve, a direct combustion flowmeter, and a direct combustion manual needle regulating valve, which are connected to the control unit, are sequentially arranged on the pipe.

[0018] Optionally, a second outlet, a gas inlet, and a second air inlet are arranged on the large-flame closed Venturi. The second outlet is connected to the large-flame waste gas mixing pipe. The gas inlet is connected to the large-flame waste gas pipe. A large-flame waste gas regulating valve, a large-flame waste gas shut-off valve, a large-flame waste gas flowmeter, and a large-flame waste gas manual regulating valve, which are connected to the control unit, are sequentially arranged on the large-flame waste gas pipe. The second air inlet is connected to the large-flame air pipe. A large-flame waste gas air regulating valve, a large-flame waste gas air flowmeter, and a large-flame explosion-proof air one-way valve, which are connected to the control unit, are sequentially arranged on the large-flame air pipe.

[0019] Optionally, it further includes an anemometer and a high-energy igniter. A combustion chamber thermocouple is arranged in the pilot burner combustion chamber. The anemometer, the high-energy igniter, and the combustion chamber thermocouple are connected to the control unit.

[0020] The present invention provides a two-stage pilot burner ignition device, and its beneficial effects are as follows:

[0021] 1. The two-stage pilot burner ignition device adopts a control method of using a small-flame natural gas nozzle to ignite the direct combustion nozzle and the large-flame waste gas nozzle. The small flame burns stably, and for the large flame, according to the magnitude of the ambient wind speed, the control system automatically controls the opening of the large-flame ignition system;

[0022] 2. In this two-stage pilot burner ignition device, a flowmeter and an air flowmeter are respectively arranged in the direct combustion large flame ignition system and the hybrid large flame ignition system. The control unit realizes automatic remote control according to the gas flow and air flow. Combustible waste gas with different pressures and different component calorific values can be used as the combustion gas source of the large flame ignition system. When the direct combustion large flame ignition system is combined with the small flame ignition system, the direct combustion large flame ignition system can use the combustible waste gas generated by devices such as oil refining and chemical plants and coal chemical plants as the combustion gas source;

[0023] 3. A closed venturi is arranged in this two-stage pilot burner ignition device. By extending the air pipe and the natural gas pipeline to the outside of the radiation-proof wall or the wind-proof wall, it is convenient to adjust the intake air volume of air and natural gas;

[0024] 4. This two-stage pilot burner ignition device can realize on-line maintenance and adjustment during equipment operation. Thermocouples are arranged in the fuel gas pipelines of the large flame and the small flame, which can detect the temperature of the fuel gas in real time. The control unit obtains the fuel gas temperature of the pilot burner in two adjacent times and compares them. Whether the current value exceeds the latter value and is within the set temperature range. When the difference is greater than 80°C, the system will identify that an abnormal phenomenon of too high fuel gas temperature occurs and will issue an alarm prompt;

[0025] 5. This two-stage pilot burner ignition device detects the combustion temperature through a thermocouple to ensure the normal combustion of the pilot burner. The system monitors the combustion temperature of the pilot burner in a cycle every 2 - 10 minutes. The temperature difference between the two detections before and after needs to be controlled within no more than the set value of 0 - 30°C. When the set temperature change value is exceeded, the system identifies that the pilot burner is extinguished and will issue an alarm prompt.

[0026] Other features and advantages of the present invention will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0028] Figure 1 The position schematic diagram of the direct combustion nozzle and the small flame natural gas nozzle in the pilot burner combustion chamber according to an embodiment of the present invention is shown.

[0029] Figure 2 The position schematic diagram of the natural gas mixing connecting pipe and the direct combustion combustible waste gas pipe in the two-stage pilot burner is shown.

[0030] Figure 3Shows a schematic diagram of the positions of a large-flame exhaust gas nozzle and a small-flame natural gas nozzle in the pilot burner combustion chamber according to an embodiment of the present invention.

[0031] Figure 4 Shows a schematic diagram of the positions of a natural gas mixing connection pipe and a large-flame exhaust gas mixing pipe in a two-stage pilot burner.

[0032] Figure 5 Shows a schematic diagram of the combined structure of a direct combustion large-flame ignition system and a small-flame ignition system according to an embodiment of the present invention.

[0033] Figure 6 Shows a schematic diagram of adding air control adjustment to the combined structure of a direct combustion large-flame ignition system and a small-flame ignition system according to an embodiment of the present invention.

[0034] Figure 7 Shows a schematic diagram of the combined structure of a hybrid large-flame ignition system and a small-flame ignition system according to an embodiment of the present invention.

[0035] Figure 8 Shows a schematic diagram of arranging a small-flame closed venturi and a large-flame closed venturi in the radiation protection wall of an open ground flare according to an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Two-stage pilot light; 2. Open ground flare; 3. Small flame natural gas pipe; 4. Small flame natural gas regulating valve; 5. Small flame natural gas flowmeter; 6. Small flame natural gas shut-off valve; 7. Small flame natural gas regulating valve; 8. Natural gas inlet; 9. Small flame closed venturi; 10. First air inlet; 11. Small flame air regulating valve; 12. Small flame air flowmeter; 13. Small flame air explosion-proof check valve; 14. Small flame air pipe; 15. First outlet; 16. Natural gas mixing connection pipe; 17. Small flame natural gas thermocouple; 18. Small flame ignition electrode; 19. Small flame natural gas nozzle; 20. Combustion chamber thermocouple; 21. Pilot light combustion chamber; 22. Control unit; 23. Anemometer; 24. High-energy igniter; 25. Large flame direct combustion nozzle perforated plate; 26. Direct combustion gas nozzle; 27. Direct combustion nozzle; 28. Deflagration connection pipe; 29. Direct combustion air pipe; 30. Direct combustion combustible waste gas pipe; 31. Direct combustion regulating valve; 32. Direct combustion shut-off valve; 33. Direct combustion flowmeter; 34. Direct combustion manual needle regulating valve; 35. Direct combustion air regulating valve; 36. Direct combustion air flowmeter; 37. Direct combustion explosion-proof check air valve; 38. Large flame waste gas nozzle; 39. Large flame thermocouple; 40. Large flame waste gas mixing pipe; 41. Large flame closed venturi; 42. Second outlet; 43. Second air inlet; 44. Gas inlet; 45. Large flame waste gas regulating valve; 46. Large flame waste gas shut-off valve; 47. Large flame waste gas flowmeter; 48. Large flame waste gas manual regulating valve; 49. Large flame waste gas pipe; 50. Large flame waste gas air regulating valve; 51. Large flame waste gas air flowmeter; 52. Large flame explosion-proof air check valve; 53. Large flame air pipe; 54. Radiation protection wall of open ground flare. Detailed implementation manners

[0038] The preferred implementation manners of the present invention will be described in more detail below. Although the preferred implementation manners of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the implementation manners set forth herein. On the contrary, these implementation manners are provided to make the present invention more thorough and complete, and to convey the scope of the present invention fully to those skilled in the art.

[0039] The present invention provides a two-stage pilot light ignition device, including:

[0040] A small flame ignition system, including a natural gas mixing connection pipe and a small flame closed venturi. The upper end of the natural gas mixing connection pipe extends into the pilot light combustion chamber, and the lower end of the natural gas mixing connection pipe is connected to the small flame closed venturi. The small flame closed venturi is arranged outside the windproof wall of the closed ground flare or outside the radiation protection wall of the open ground flare;

[0041] The small flame closed Venturi is also connected to the small flame natural gas pipe and the small flame air pipe;

[0042] The large flame ignition system includes a direct combustion large flame ignition system and a hybrid large flame ignition system. The direct combustion large flame ignition system and the small flame ignition system are arranged in a pilot burner combustion chamber, and the hybrid large flame ignition system and the small flame ignition system are arranged in another pilot burner combustion chamber;

[0043] The hybrid large flame ignition system includes a large flame exhaust gas mixing pipe and a large flame closed Venturi. The upper end of the large flame exhaust gas mixing pipe extends into the pilot burner, and the lower end of the large flame exhaust gas mixing pipe is connected to the large flame closed Venturi. The large flame closed Venturi is arranged outside the windproof wall of the enclosed ground flare or outside the radiation protection wall of the open ground flare;

[0044] The large flame closed Venturi is also connected to the large flame exhaust pipe and the large flame air pipe;

[0045] The control unit is connected to the small flame ignition system and the large flame ignition system for control.

[0046] Specifically, the two-stage pilot burner ignition device monitors the surrounding environment through an anemometer. When the ambient wind speed exceeds the set value, the control unit issues an instruction to use the large flame ignition system in combination with the small flame ignition system. When the pressure of the exhaust gas mixture is less than 0.1 MPa, the hybrid large flame ignition system and the small flame ignition system are used in combination. The combustible exhaust gas and air are mixed through the large flame closed Venturi, and then sent into the pilot burner combustion chamber through the large flame exhaust gas mixing pipe, and are ignited by the small flame that has been stably burning; when the pressure of the exhaust gas mixture is greater than 0.1 MPa, the direct combustion large flame ignition system and the small flame ignition system are used in combination. The combustible exhaust gas enters the direct combustion nozzle from the direct combustion combustible exhaust gas pipe, and the combustible exhaust gas is ejected from the direct combustion gas nozzle and the multi-hole plate of the large flame direct combustion nozzle in sequence, and is ignited by the small flame that has been stably burning. In the small flame ignition system and the hybrid large flame ignition system, the small flame closed Venturi and the large flame closed Venturi are arranged outside the windproof wall or the radiation protection wall to realize on-line maintenance and facilitate the control of the intake air volume of gas and air; moreover, for the Venturi adopted by the two-stage pilot burner ignition device, only one combustible gas inlet and one air inlet are provided for the Venturi, so that the combustible gas and air are fully mixed, and the intake air volume is controlled through the valve bodies on the connected combustible gas pipe and air, and the control of the two-stage pilot burner ignition device can also be realized.

[0047] Optionally, a small-flame natural gas nozzle is provided at the upper end of the natural gas mixing connection pipe. The direct combustion large-flame ignition system includes a direct combustion combustible waste gas pipe. The upper end of the direct combustion combustible waste gas pipe extends into the pilot burner combustion chamber. A direct combustion nozzle is provided at the upper end of the direct combustion combustible waste gas pipe. A direct combustion gas nozzle and a large-flame direct combustion nozzle perforated plate are provided inside the direct combustion nozzle.

[0048] Specifically, when the direct combustion large-flame ignition system and the small-flame ignition system are arranged in the same pilot burner, the small-flame natural gas nozzle and the direct combustion nozzle are arranged in the same pilot burner combustion chamber. The direct combustion nozzle ejects the combustible gas in the direct combustion combustible waste gas pipe through the direct combustion gas nozzle, mixes it with the air ejected from the direct combustion air pipe, and finally discharges it through the large-flame direct combustion nozzle perforated plate. The discharged combustible gas mixture is ignited by the flame of the small-flame natural gas nozzle.

[0049] Optionally, a small-flame natural gas thermocouple is provided inside the natural gas mixing connection pipe, and a large-flame thermocouple is provided inside the large-flame waste gas mixing pipe. The small-flame natural gas thermocouple and the large-flame thermocouple are connected to the control unit.

[0050] Specifically, the small-flame natural gas thermocouple monitors the flame temperature of the small-flame natural gas nozzle, and the large-flame thermocouple also monitors the flame temperature of the large-flame waste gas mixing pipe. The flame temperature is monitored cyclically. When the temperature difference before and after within the set unit time exceeds the set value, it indicates that an abnormal phenomenon has occurred in the pilot burner, and an alarm instruction needs to be issued.

[0051] Optionally, the pilot burner combustion chamber is also communicated with the direct combustion air pipe. The direct combustion air pipe extends to a pipe outside the windproof wall of the enclosed ground flare or outside the radiation-proof wall of the open ground flare. A direct combustion air regulating valve, a direct combustion air flow meter, and a direct combustion explosion-proof one-way air valve connected to the control unit are sequentially provided.

[0052] Specifically, when the flame of the small-flame natural gas nozzle ignites the combustible gas ejected by the direct combustion large-flame ignition system, the direct combustion air pipe also inputs air to the direct combustion nozzle, and the air flow is controlled by the direct combustion air regulating valve, the direct combustion air flow meter, and the direct combustion explosion-proof one-way air valve to ensure the normal combustion of the pilot burner.

[0053] Optionally, a large-flame waste gas nozzle is provided at the upper end of the large-flame waste gas mixing pipe, and the large-flame waste gas nozzle is arranged on the outer periphery of the small-flame natural gas nozzle.

[0054] Specifically, when the hybrid large-flame ignition system and the small-flame ignition system are arranged in the same pilot burner, the combustible gas mixture is sent to the large-flame exhaust gas nozzle through the large-flame exhaust gas mixing pipe, and the combustible gas mixture ejected from the large-flame exhaust gas nozzle is ignited by the central flame; a deflagration connecting pipe is also connected in the pilot burner combustion chamber, and the ground flame can be transmitted to the pilot burner combustion chamber through this pipe to ignite the combustible gas mixture in the combustion chamber.

[0055] Optionally, a small-flame natural gas regulating valve, a small-flame natural gas flowmeter, a small-flame natural gas on-off valve, and a small-flame natural gas regulating valve are sequentially arranged on the small-flame natural gas pipe. The small-flame natural gas pipe is connected to the natural gas inlet of the small-flame closed venturi. The natural gas mixing connecting pipe is connected to the first outlet of the small-flame closed venturi, and a small-flame ignition electrode is arranged in the natural gas mixing connecting pipe.

[0056] Optionally, the first air inlet of the small-flame closed venturi is connected to the small-flame air pipe. A small-flame air regulating valve, a small-flame air flowmeter, and a small-flame air explosion-proof check valve are sequentially installed on the small-flame air pipe. The first outlet of the small-flame closed venturi is connected to the natural gas mixing connecting pipe. The small-flame natural gas flowmeter, the small-flame natural gas on-off valve, the small-flame natural gas regulating valve, the small-flame air regulating valve, the small-flame air flowmeter, and the small-flame ignition electrode are connected to the control unit.

[0057] Specifically, in the small-flame ignition system, the small-flame natural gas pipe and the small-flame air pipe are connected through the small-flame closed venturi. Natural gas and air are mixed through the two pipes and then input into the natural gas mixing connecting pipe. Under the control of the control unit, the high-energy igniter is started. The high-energy igniter is connected to the ignition electrode through a high-voltage cable, and an electric spark is emitted through the small-flame ignition electrode to ignite the mixture in the natural gas mixing connecting pipe. In this way, the small-flame natural gas nozzle ejects a flame; a flowmeter, an on-off valve, and a regulating valve are arranged on the small-flame natural gas pipe, so that the intake of natural gas can be adjusted. A regulating valve, a flowmeter, and a check valve are arranged on the small-flame air pipe to adjust the intake of air in the same way. The control unit can be a PLC control cabinet or a DCS control cabinet, so that the small-flame ignition system can realize on-site control or remote control.

[0058] Optionally, on the pipe where the lower end of the direct-combustion combustible waste gas pipe extends outside the windbreak wall of the closed ground flare or outside the radiation protection wall of the open ground flare, a direct-combustion regulating valve, a direct-combustion on-off valve, a direct-combustion flowmeter, and a direct-combustion manual needle regulating valve connected to the control unit are sequentially arranged.

[0059] Specifically, when the direct combustion large flame ignition system and the small flame ignition system are arranged in the same pilot lamp and no air control adjustment is required, the combustible gas mixture is input into the combustion chamber of the pilot lamp through the direct combustion combustible waste gas pipe, and the control unit controls the regulating valve, the switching valve and the manual valve on the direct combustion combustible waste gas pipe according to the data on the flowmeter.

[0060] Optionally, a second outlet, a gas inlet and a second air inlet are provided on the large flame closed venturi. The second outlet is connected to the large flame waste gas mixing pipe, the gas inlet is connected to the large flame waste gas pipe, and a large flame waste gas regulating valve, a large flame waste gas switching valve, a large flame waste gas flowmeter and a large flame waste gas manual regulating valve connected to the control unit are sequentially arranged on the large flame waste gas pipe. The second air inlet is connected to the large flame air pipe, and a large flame waste gas air regulating valve, a large flame waste gas air flowmeter and a large flame explosion-proof air one-way valve connected to the control unit are sequentially arranged on the large flame air pipe.

[0061] Specifically, when the hybrid large flame ignition system and the small flame ignition system are arranged in the same pilot lamp, the large flame waste gas pipe and the large flame air pipe are connected through the large flame closed venturi, and natural gas and air are mixed through two pipes and then input into the large flame waste gas mixing pipe. Finally, the mixed gas ejected from the large flame waste gas nozzle is ignited by the flame of the small flame natural gas nozzle; under the control of the control unit, the intake air volume of the combustible gas and air can be adjusted. The specific control method is as follows: the control unit adjusts the flow rate of the regulating valve arranged on the large flame waste gas pipe through the flowmeter, opens and closes the switching valve, and manually adjusts the needle valve. The system controls and adjusts the air flow rate of the regulating valve on the air pipe through the flowmeter on the large flame air pipe.

[0062] Optionally, it further includes an anemometer and a high-energy igniter. A combustion chamber thermocouple is arranged in the combustion chamber of the pilot lamp. The anemometer, the high-energy igniter and the combustion chamber thermocouple are connected to the control unit.

[0063] Specifically, the temperature of the combustion chamber of the pilot lamp is monitored through the combustion chamber thermocouple, and it is judged according to the anemometer whether it is necessary to start the large flame ignition system to cooperate with the small flame ignition system. When the combustible gas needs to be ignited, a signal is sent to the ignition electrode through the high-energy igniter to ignite the small flame combustible gas. When the ambient wind speed exceeds the wind speed set by the control unit, the control unit will open the direct combustion combustible waste gas pipe or the large flame waste gas pipe and the large flame air pipe, so that the combustible waste gas will be mixed with air, and finally the combustible gas mixture will enter the combustion chamber of the pilot lamp and be ignited by the flame on the small flame natural gas nozzle; when the ambient wind speed is lower than the wind speed set by the control unit, the control unit will close the switching valves of the waste gas pipe and the air pipe in the open state.

[0064] Embodiment

[0065] Such asFigures 1 to 8 As shown in the figure, the present invention provides a two-stage pilot light ignition device, including:

[0066] A small flame ignition system, including a natural gas mixing connection pipe 16 and a small flame closed venturi 9. The upper end of the natural gas mixing connection pipe 16 extends into the pilot light combustion chamber 21, and the lower end of the natural gas mixing connection pipe 16 is connected to the small flame closed venturi 9. The small flame closed venturi 9 is arranged outside the windbreak wall of the closed ground flare or outside the radiation protection wall 54 of the open ground flare;

[0067] The small flame closed venturi 9 is also connected to a small flame natural gas pipe 3 and a small flame air pipe 14;

[0068] A large flame ignition system, including a direct combustion large flame ignition system and a mixed large flame ignition system. The direct combustion large flame ignition system and the small flame ignition system are arranged in one pilot light combustion chamber 21, and the mixed large flame ignition system and the small flame ignition system are arranged in another pilot light combustion chamber 21;

[0069] The mixed large flame ignition system includes a large flame exhaust gas mixing pipe 40 and a large flame closed venturi 41. The upper end of the large flame exhaust gas mixing pipe 40 extends into the pilot light burner 21, and the lower end of the large flame exhaust gas mixing pipe 40 is connected to the large flame closed venturi 41. The large flame closed venturi 41 is arranged outside the windbreak wall of the closed ground flare or outside the radiation protection wall of the open ground flare;

[0070] The large flame closed venturi 41 is also connected to a large flame exhaust pipe 49 and a large flame air pipe 53;

[0071] A control unit 22, which is connected to the small flame ignition system and the large flame ignition system for control.

[0072] In this embodiment, a small flame natural gas nozzle 19 is arranged at the upper end of the natural gas mixing connection pipe 16. The direct combustion large flame ignition system includes a direct combustion combustible exhaust gas pipe 30. The upper end of the direct combustion combustible exhaust gas pipe 30 extends into the pilot light combustion chamber 21. A direct combustion nozzle 27 is arranged at the upper end of the direct combustion combustible exhaust gas pipe 30, and a direct combustion gas nozzle 26 and a multi-hole plate 25 of the large flame direct combustion nozzle are arranged inside the direct combustion nozzle.

[0073] In this embodiment, a small flame natural gas thermocouple 17 is arranged inside the natural gas mixing connection pipe 16, and a large flame thermocouple 39 is arranged inside the large flame exhaust gas mixing pipe 40. The small flame natural gas thermocouple 17 and the large flame thermocouple 39 are connected to the control unit 22.

[0074] In this embodiment, the pilot burner combustion chamber 21 is also communicated with the direct combustion air pipe 29. The direct combustion air pipe 29 extends to a pipe outside the windproof wall of the enclosed ground flare or outside the radiation-proof wall of the open ground flare, and is successively provided with a direct combustion air regulating valve 35, a direct combustion air flowmeter 36, and a direct combustion explosion-proof one-way air valve 37 connected to the control unit 22.

[0075] In this embodiment, a large flame waste gas spray head 38 is provided at the upper end of the large flame waste gas mixing pipe 40, and the large flame waste gas spray head 38 is arranged on the outer periphery of the small flame natural gas spray head 19.

[0076] In this embodiment, a small flame natural gas regulating valve 4, a small flame natural gas flowmeter 5, a small flame natural gas on-off valve 6, and a small flame natural gas regulating valve 7 are successively arranged on the small flame natural gas pipe 3. The small flame natural gas pipe 3 is connected to the natural gas inlet 8 of the small flame closed venturi 9. The natural gas mixing connection pipe 16 is connected to the first outlet 15 of the small flame closed venturi 9, and a small flame ignition electrode 18 is arranged in the natural gas mixing connection pipe 16.

[0077] In this embodiment, the first air inlet 10 of the small flame closed venturi 9 is connected to the small flame air pipe 14. A small flame air regulating valve 11, a small flame air flowmeter 12, and a small flame air explosion-proof one-way valve 13 are successively installed on the small flame air pipe 14. The first outlet 15 of the small flame closed venturi 9 is connected to the natural gas mixing connection pipe 16. The small flame natural gas flowmeter 5, the small flame natural gas on-off valve 6, the small flame natural gas regulating valve 7, the small flame air regulating valve 11, the small flame air flowmeter 12, and the small flame ignition electrode 18 are connected to the control unit 22.

[0078] In this embodiment, the lower end of the direct combustion combustible waste gas pipe 30 extends to a pipe outside the windproof wall of the enclosed ground flare or outside the radiation-proof wall of the open ground flare, and is successively provided with a direct combustion regulating valve 31, a direct combustion on-off valve 32, a direct combustion flowmeter 33, and a direct combustion manual needle regulating valve 34 connected to the control unit 22.

[0079] In this embodiment, a second outlet 42, a gas inlet 44, and a second air inlet 43 are provided on the large flame closed venturi 41. The second outlet 42 is connected to the large flame waste gas mixing pipe 40. The gas inlet 44 is connected to the large flame waste gas pipe 49. A large flame waste gas regulating valve 45, a large flame waste gas on-off valve 46, a large flame waste gas flowmeter 47, and a large flame waste gas manual regulating valve 48 connected to the control unit 22 are successively arranged on the large flame waste gas pipe 49. The second air inlet 43 is connected to the large flame air pipe 53. A large flame waste gas air regulating valve 50, a large flame waste gas air flowmeter 51, and a large flame explosion-proof air one-way valve 52 connected to the control unit 22 are successively arranged on the large flame air pipe 53.

[0080] In this embodiment, it further includes an anemometer 23 and a high-energy igniter 24. A combustion chamber thermocouple 20 is arranged in the pilot burner combustion chamber 21. The anemometer 23, the high-energy igniter 24, and the combustion chamber thermocouple 20 are connected to the control unit 22.

[0081] In summary, during the operation of this two-stage pilot burner ignition device, the control unit 22 issues an instruction to start the high-energy igniter 24. The small flame ignition electrode 18 connected by a high-voltage cable emits an electric spark to ignite the natural gas ejected from the small flame natural gas nozzle 19. When the temperature monitored by the combustion chamber thermocouple is uploaded to the control unit 22 and the temperature continues to rise and stabilizes within a certain temperature range, it indicates that the ignition is successful. When the temperature does not rise, it indicates that the ignition fails. Under the control of the control unit 22, the combustion chamber thermocouple 20 detects by using a method of circularly detecting and comparing the temperature. The system is set to compare the temperature data collected for the second time with the temperature data collected for the first time within a unit time. When the temperature data collected for the second time is lower than the temperature data collected for the first time and lower than the set range of 0 - 50 °C, the control unit will issue an alarm prompt, indicating that the pilot burner has gone out; when the small flame natural gas thermocouple monitors the temperature in the natural gas mixing connection pipe and the temperature exceeds the set temperature of 80 °C, the control unit will issue an alarm instruction, indicating that the gas temperature of the pilot burner is abnormal, and the system issues an alarm prompt.

[0082] The various embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A two-stage ever-burning lamp ignition device, characterized in that: include: A small flame ignition system comprises a natural gas mixing connecting pipe (16) and a small flame enclosed venturi (9), wherein the upper end of the natural gas mixing connecting pipe (16) extends into the combustion chamber (21) of the pilot lamp, and the lower end of the natural gas mixing connecting pipe (16) is connected to the small flame enclosed venturi (9), and the small flame enclosed venturi (9) is arranged outside the windproof wall of a closed ground torch or outside the radiation protection wall (54) of an open ground torch; The small flame closed venturi (9) is also connected to the small flame natural gas pipe (3) and the small flame air pipe (14); A large flame ignition system, comprising a direct-burning large flame ignition system and a hybrid large flame ignition system, wherein the direct-burning large flame ignition system and the small flame ignition system are arranged in one of the ever-burning lamp combustion chambers (21), and the hybrid large flame ignition system and the small flame ignition system are arranged in another of the ever-burning lamp combustion chambers (21); The hybrid large flame ignition system comprises a large flame exhaust gas mixing pipe (40) and a large flame closed venturi (41), the upper end of the large flame exhaust gas mixing pipe (40) extends into the long-burning lamp burner (21), the lower end of the large flame exhaust gas mixing pipe (40) is connected to the large flame closed venturi (41), and the large flame closed venturi (41) is arranged outside the windproof wall of the closed ground torch or outside the radiation protection wall of the open ground torch; The large flame enclosed venturi (41) is also connected to a large flame exhaust pipe (49) and a large flame air pipe (53); A control unit (22) is control-connected to the small flame ignition system and the large flame ignition system.

2. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: A small flame natural gas nozzle (19) is arranged at the upper end of the natural gas mixing connecting pipe (16), and the direct-burning large flame ignition system includes a direct-burning combustible waste gas pipe (30), the upper end of the direct-burning combustible waste gas pipe (30) extends into the ever-burning lamp combustion chamber (21), and a direct-burning nozzle (27) is arranged at the upper end of the direct-burning combustible waste gas pipe (30), and a direct-burning gas nozzle (26) and a large flame direct-burning nozzle porous plate (25) are arranged in the direct-burning nozzle.

3. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: A small flame natural gas thermocouple (17) is arranged in the natural gas mixing connecting pipe (16), a large flame thermocouple (39) is arranged in the large flame exhaust gas mixing pipe (40), and the small flame natural gas thermocouple (17) and the large flame thermocouple (39) are connected to the control unit (22).

4. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: The combustion chamber (21) of the ever-burning lamp is also connected to a direct-fired air pipe (29), which extends to a pipeline outside the windbreak wall of a closed ground flare or outside the radiation protection wall of an open ground flare, and is provided with a direct-fired air regulating valve (35) connected to the control unit (22), a direct-fired air flow meter (36), and a direct-fired explosion-proof one-way air valve (37) in sequence.

5. The two-stage ever-burning lamp ignition device according to claim 2, characterized in that: A large flame exhaust gas nozzle (38) is arranged at the upper end of the large flame exhaust gas mixing pipe (40), and the large flame exhaust gas nozzle (38) is arranged on the periphery of the small flame natural gas nozzle (19).

6. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: The small flame natural gas pipe (3) is provided with a small flame natural gas regulating valve (4), a small flame natural gas flow meter (5), a small flame natural gas switch valve (6) and a small flame natural gas regulating valve (7) in sequence; the small flame natural gas pipe (3) is connected to the natural gas inlet (8) of the small flame closed venturi (9); the natural gas mixing connecting pipe (16) is connected to the first outlet (15) of the small flame closed venturi (9); and a small flame ignition electrode (18) is provided in the natural gas mixing connecting pipe (16).

7. The two-stage ever-burning lamp ignition device according to claim 6, characterized in that: The first air inlet (10) of the small flame enclosed venturi (9) is connected to a small flame air pipeline (14), on which a small flame air regulating valve (11), a small flame air flow meter (12) and a small flame air explosion-proof check valve (13) are sequentially installed. The first outlet (15) of the small flame enclosed venturi (9) is connected to the natural gas mixing connecting pipe (16), and the small flame natural gas flow meter (5), the small flame natural gas switch valve (6), the small flame natural gas regulating valve (7), the small flame air regulating valve (11), the small flame air flow meter (12) and the small flame ignition electrode (18) are connected to the control unit (22).

8. The two-stage ever-burning lamp ignition device according to claim 2, characterized in that: The lower end of the direct-fired combustible waste gas pipe (30) extends to a pipeline outside the windbreak wall of a closed ground flare or outside the radiation protection wall of an open ground flare, and is provided with a direct-fired regulating valve (31) connected to the control unit (22), a direct-fired switch valve (32), a direct-fired flow meter (33) and a direct-fired manual needle regulating valve (34) in sequence.

9. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: The large flame closed venturi (41) is provided with a second outlet (42), a gas inlet (44) and a second air inlet (43); the second outlet (42) is connected to the large flame exhaust gas mixing pipe (40); the gas inlet (44) is connected to the large flame exhaust gas pipe (49); the large flame exhaust gas regulating valve (45) connected to the control unit (22), a large flame exhaust gas switch valve (46), a large flame exhaust gas flow meter (47) and a large flame exhaust gas manual regulating valve (48) are sequentially provided on the large flame exhaust gas pipe (49); the second air inlet (43) is connected to the large flame air pipe (53); the large flame air pipe (53) is sequentially provided with a large flame exhaust gas air regulating valve (50) connected to the control unit (22), a large flame exhaust gas air flow meter (51) and a large flame explosion-proof air check valve (52).

10. The two-stage ever-burning lamp ignition device according to claim 1, characterized in that: It also includes an anemometer (23) and a high-energy igniter (24); a combustion chamber thermocouple (20) is arranged in the combustion chamber (21) of the ever-burning lamp; the anemometer (23), the high-energy igniter (24), and the combustion chamber thermocouple (20) are connected to the control unit (22).

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