High-altitude three-stage torch head equipment

Abstract

The invention discloses high-altitude three-stage torch head equipment, and relates to the technical field of petroleum and natural gas torch equipment. The device comprises a vertically-mounted torch windshield and a plasma igniter connected to the interior of the torch windshield, and a first-stage torch channel, a second-stage torch channel and a third-stage torch channel are vertically connected to the interior of the torch windshield. The device has the beneficial effect that the device can meet the emission requirement when the flare gas emptying span in the petroleum and natural gas industry is very large.

Description

Technical Field

[0001] This invention relates to the field of oil and gas flare equipment technology, and in particular to a high-altitude three-stage flare head device. Background Technology

[0002] During production, oil and gas companies generate numerous flammable and explosive gases, posing significant safety hazards. To ensure safety and mitigate environmental pollution, these gases are collected and incinerated in flares. While these gases are also valuable fuel resources, and direct combustion would be wasteful, the flare remains indispensable. In emergencies, it is a crucial facility for ensuring safety and incinerating large quantities of flammable gases. Therefore, in oil and gas companies, the flare is considered a vital last line of defense.

[0003] In the oil and gas industry, the minimum and maximum flare volumes of flare gas sometimes differ significantly, necessitating a wider range of flare volume tolerances. Generally, a flare head can meet the maximum flare volume but struggles to accommodate smaller flare volumes, making it difficult for flare gas with smaller flare volumes to achieve its emission objectives through successful combustion. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-altitude three-stage flare head device that can meet the emission requirements when the flare gas venting volume of the oil and gas industry has a large range, in order to address the above-mentioned technical deficiencies.

[0005] The technical solution adopted in this invention is: to provide a high-altitude three-stage flare head device, including a vertically mounted flare windproof cover, a plasma igniter connected inside the flare windproof cover, and a first-stage flare channel, a second-stage flare channel and a third-stage flare channel connected vertically inside the flare windproof cover.

[0006] To further optimize this technical solution, the flow area of ​​the third-stage flare channel of a high-altitude three-stage flare head device is larger than that of the second-stage flare channel; the flow area of ​​the second-stage flare channel is larger than that of the first-stage flare channel.

[0007] To further optimize this technical solution, the first-stage flare channel of a high-altitude three-stage flare head device is arranged outside the third-stage flare channel; the second-stage flare channel is arranged inside the third-stage flare channel.

[0008] To further optimize this technical solution, a high-altitude three-stage flare head device is provided with multiple plasma igniters, which are evenly distributed circumferentially on the outside of the third-stage flare channel; the first-stage flare channel is correspondingly arranged inside one of the plasma igniters.

[0009] To further optimize this technical solution, the maximum venting capacity of the first-stage flare channel of a high-altitude three-stage flare head device is greater than the minimum venting capacity of the second-stage flare channel; the maximum venting capacity of the second-stage flare channel is greater than the minimum venting capacity of the third-stage flare channel.

[0010] Further optimizing this technical solution, a high-altitude three-stage flare head device includes a first-stage flare channel connected to the main flare gas pipeline via a first branch pipe; a second-stage flare channel connected to the main flare gas pipeline via a second branch pipe; and a third-stage flare channel connected to the main flare gas pipeline via a third branch pipe. A pressure transmitter is installed in the main flare gas pipeline. Pneumatic shut-off valves are installed in the first, second, and third branch pipes respectively. All pneumatic shut-off valves are controlled by pressure transmitters for opening and closing.

[0011] To further optimize this technical solution, a manual shut-off valve is connected in parallel to the pneumatic shut-off valve of a high-altitude three-stage flare head device.

[0012] To further optimize this technical solution, a rupture disc is connected to the bypass of the pneumatic shut-off valve of a high-altitude three-stage flare head device.

[0013] To further optimize this technical solution, the number of pressure transmitters in a high-altitude three-stage flare head device shall be at least two.

[0014] The beneficial effects of this invention are as follows: Flare gas can be emitted through a first-stage flare channel, a second-stage flare channel, and a third-stage flare channel. A plasma igniter can ignite and burn the emitted flare gas, reducing environmental pollution caused by direct emissions. The separate setup of the first-stage, second-stage, and third-stage flare channels can accommodate emission requirements when the range of flare gas venting volume is very large. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pipeline connection of the present invention.

[0016] In the diagram, 1. Flare wind shield; 2. Plasma igniter; 3. First-stage flare channel; 4. Second-stage flare channel; 5. Third-stage flare channel; 6. First branch pipe; 7. Second branch pipe; 8. Third branch pipe; 9. Flare gas main pipeline; 10. Pressure transmitter; 11. Pneumatic shut-off valve; 12. Manual shut-off valve; 13. Rupture disc. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1As shown, a high-altitude three-stage flare head device includes a vertically mounted flare windproof cover 1 (made of flat steel welded together), a plasma igniter 2 connected inside the flare windproof cover 1, and a first-stage flare channel 3, a second-stage flare channel 4 and a third-stage flare channel 5 connected vertically inside the flare windproof cover 1.

[0019] In this scheme, the separate configuration of the first-stage flare channel 3, the second-stage flare channel 4, and the third-stage flare channel 5 can accommodate emission requirements with a large range of flare gas venting volumes. When the flare gas reaches the minimum venting volume requirement, it is emitted through the first-stage flare channel 3. As the flare gas venting volume increases to a certain level, the second-stage flare channel 4 begins to emit, and when it continues to increase to a certain level, the third-stage flare channel 5 begins to emit, thus meeting the requirements of different flare gas venting volumes.

[0020] This scheme involves three stages of venting. In practical applications, the diameter of each stage of the flare channel and the upper and lower limits of the flare gas control pressure are determined based on the minimum and maximum gas volume required for flare gas venting in the actual scenario.

[0021] like Figure 1 As shown, the flow area of ​​the third-stage flare channel 5 is larger than that of the second-stage flare channel 4; the flow area of ​​the second-stage flare channel 4 is larger than that of the first-stage flare channel 3. This difference in flow area size better accommodates varying flare gas venting volumes. The first-stage flare channel 3 can handle sufficiently small flare gas venting volumes, while the combination of the first-stage flare channel 3, the second-stage flare channel 4, and the third-stage flare channel 5 can handle sufficiently large flare gas venting volumes.

[0022] like Figure 1 As shown, the first-stage flare channel 3 is located outside the third-stage flare channel 5; the second-stage flare channel 4 is located inside the third-stage flare channel 5. This arrangement can significantly save space while meeting the requirement of a large range of flare gas venting volumes.

[0023] Multiple plasma igniters 2 are provided and are evenly distributed circumferentially outside the third-stage flare channel 5; the first-stage flare channel 3 is correspondingly arranged inside one of the plasma igniters 2. This arrangement facilitates the smooth ignition of each flare channel by the plasma igniters 2.

[0024] The maximum venting capacity of the first-stage flare channel 3 is greater than the minimum venting capacity of the second-stage flare channel 4; the maximum venting capacity of the second-stage flare channel 4 is greater than the minimum venting capacity of the third-stage flare channel 5. This configuration ensures that any venting capacity between the minimum and maximum venting capacity of the flare gas can be reliably vented, avoiding the problem of unreliable venting due to the discontinuous range of flare gas venting capacity.

[0025] like Figure 2As shown, the first-stage flare channel 3 is connected to the main flare gas pipeline 9 via the first branch pipe 6; the second-stage flare channel 4 is connected to the main flare gas pipeline 9 via the second branch pipe 7; and the third-stage flare channel 5 is connected to the main flare gas pipeline 9 via the third branch pipe 8. A pressure transmitter 10 is installed in the main flare gas pipeline 9. Pneumatic shut-off valves 11 are installed in the first branch pipe 6, the second branch pipe 7, and the third branch pipe 8, respectively. The opening and closing of each pneumatic shut-off valve 11 is controlled by the pressure transmitter 10. Each flare channel can be connected to its corresponding branch pipe via flanges.

[0026] Pressure transmitter 10 detects the flare gas pressure in the main flare gas pipeline 9. When the flare gas pressure is lower than the set upper limit, the pneumatic shut-off valves 11 of each branch pipe cannot be opened to ensure a slight positive pressure in the flare gas. When the pressure is higher than the set upper limit, the pneumatic shut-off valve 11 of the first branch pipe 6 opens, and the flare gas is vented through the first-stage flare channel 3 at a certain speed (greater than the flare's backfire speed). When the pressure is still higher than the set upper limit, the pneumatic shut-off valve 11 of the second branch pipe 7 opens, and the second-stage flare channel 4 begins to vent. When the pressure is still higher than the set upper limit, the pneumatic shut-off valve 11 of the third branch pipe 8 opens, and the third-stage flare channel 5 begins to vent.

[0027] When the pressure drops to the lower limit set for the corresponding third-stage flare channel 5, the pneumatic shut-off valve 11 of the third branch pipe 8 closes, and the third-stage flare channel 5 stops venting; when the pressure drops to the lower limit set for the corresponding second-stage flare channel 4, the pneumatic shut-off valve 11 of the second branch pipe 7 closes, and the second-stage flare channel 4 stops venting; when the pressure drops to the lower limit set for the corresponding first-stage flare channel 3, the pneumatic shut-off valve 11 of the first branch pipe 6 closes, and the first-stage flare channel 3 stops venting, thus stopping the flare gas venting operation of the entire equipment.

[0028] To accommodate the venting requirements of each flare channel, the diameters of the first branch pipe 6, the second branch pipe 7, and the third branch pipe 8 can be sequentially increased.

[0029] like Figure 2 As shown, each pneumatic shut-off valve 11 is connected in parallel with a manual shut-off valve 12. The pneumatic shut-off valves 11 are preset to open sequentially, but in the event of a pneumatic valve failure, the opening and closing of each branch pipe can also be manually controlled by the manual shut-off valves 12 to ensure the safe venting of the flare gas.

[0030] like Figure 2 As shown, each pneumatic shut-off valve 11 is connected to a rupture disc 13 via a bypass. When the pneumatic shut-off valve 11 malfunctions, the bypass rupture disc 13 breaks, ensuring the safe venting of the flare gas. The rupture disc 13 can be interlocked with a buzzer for control; when the rupture disc 13 activates, the buzzer will sound an alarm to alert personnel.

[0031] like Figure 2As shown, the number of pressure transmitters 10 is at least two. This ensures more accurate and reliable detection of flare gas pressure values ​​and prevents the entire equipment from becoming unusable due to the failure of a single pressure transmitter 10.

[0032] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A high-altitude three-stage flare head device, comprising a vertically mounted flare windproof cover (1) and a plasma igniter (2) connected inside the flare windproof cover (1), characterized in that: The inner edge of the torch wind shield (1) is vertically connected to the first-level torch channel (3), the second-level torch channel (4) and the third-level torch channel (5).

2. The high-altitude three-stage flare head device according to claim 1, characterized in that: The circulation area of ​​the third-level torch channel (5) is larger than that of the second-level torch channel (4); the circulation area of ​​the second-level torch channel (4) is larger than that of the first-level torch channel (3).

3. The high-altitude three-stage flare head device according to claim 2, characterized in that: The first-level torch channel (3) is located outside the third-level torch channel (5); the second-level torch channel (4) is located inside the third-level torch channel (5).

4. The high-altitude three-stage flare head device according to claim 3, characterized in that: Multiple plasma igniters (2) are provided and are evenly distributed circumferentially outside the third-stage torch channel (5); the first-stage torch channel (3) is arranged inside one of the plasma igniters (2).

5. A high-altitude three-stage flare head device according to claim 2, characterized in that: The maximum venting capacity of the first-stage flare channel (3) is greater than the minimum venting capacity of the second-stage flare channel (4); the maximum venting capacity of the second-stage flare channel (4) is greater than the minimum venting capacity of the third-stage flare channel (5).

6. The high-altitude three-stage flare head device according to claim 5, characterized in that: The first-stage flare channel (3) is connected to the main flare gas pipeline (9) through the first branch pipe (6); the second-stage flare channel (4) is connected to the main flare gas pipeline (9) through the second branch pipe (7); the third-stage flare channel (5) is connected to the main flare gas pipeline (9) through the third branch pipe (8); a pressure transmitter (10) is installed in the main flare gas pipeline (9); pneumatic shut-off valves (11) are installed in the first branch pipe (6), the second branch pipe (7) and the third branch pipe (8); the pneumatic shut-off valves (11) are all controlled by the pressure transmitter (10) to open and close.

7. A high-altitude three-stage flare head device according to claim 6, characterized in that: Each pneumatic shut-off valve (11) is connected in parallel with a manual shut-off valve (12).

8. A high-altitude three-stage flare head device according to claim 6, characterized in that: Each pneumatic shut-off valve (11) is connected to a rupture disc (13) via a bypass.

9. A high-altitude three-stage flare head device according to claim 6, characterized in that: The number of pressure transmitters (10) is at least two.

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