An ultra-low nitrogen burner applied to an oilfield wellhead and using associated gas as fuel

Abstract

The application discloses an ultra-low nitrogen combustor applied to an oilfield well mouth and utilizing associated gas as fuel, which comprises a combustor assembly, wherein a fan control box is arranged, one side of the fan control box is fixed with an air outlet pipe, the outer ring of one end of the air outlet pipe is sleeved with a combustion head, one side of the fan control box is fixed with an igniter, and the surface of the fan control box is fixed with an air inlet pipe. The application can directly back-flush the surface of filter cotton, so that workers do not need to disassemble the filter part or use high-pressure gas or high-pressure water for flushing outside, the time for workers to disassemble and assemble the filter structure is greatly saved, the blowing part swings repeatedly through the impact force of high-pressure gas in the back-flushing process, the blowing area is increased, the outside of the filter cotton can be cleaned, and a closed chamber is temporarily formed in the blowing process, so that the high-pressure gas can impact the surface of the filter cotton stably, and the dust cleaning effect is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and in particular to an ultra-low nitrogen burner used at oilfield wellheads that utilizes associated gas as fuel. Background Technology

[0002] Petroleum is one of the world's most important energy resources, and associated gas accounts for a certain proportion of oilfield gas production. It is a mixture of natural gas and other impurities. In the past, these associated gases were usually directly emitted into the atmosphere, causing irreversible environmental pollution and wasting energy resources. With the increasing awareness of environmental protection and the increasing depletion of energy resources, the research and application of associated gas recovery technology in oilfields has become particularly important. It can not only reduce greenhouse gas emissions and environmental pollution, but also improve the comprehensive utilization rate of oil and gas resources and reduce resource waste.

[0003] Traditional water-jacketed furnaces in oilfields directly connect associated gas from oil wells to the burner for combustion. The heat generated from the combustion of associated gas is used to heat the oilfield pipeline network and for domestic heating. However, due to the high amount of impurities in associated gas, it is necessary to depressurize and filter it before use. During use, impurities from the associated gas will adhere to the surface of the filter structure, requiring workers to manually disassemble the filter structure periodically for cleaning or replacement, or to externally flush it with high-pressure gas or water. These additional disassembly and assembly steps increase the workload of workers. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing ultra-low nitrogen burners used in oilfield wellheads that utilize associated gas as fuel, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that impurities in the associated gas will adhere to the surface of the filter structure, requiring workers to manually disassemble the filter structure periodically for cleaning or replacement, or to use high-pressure gas or high-pressure water to rinse it externally. This requires additional disassembly and assembly steps, which increases the workload of workers.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel, comprising: a burner assembly including a blower control box, an outlet pipe fixed to one side of the blower control box, a burner head fitted around one end of the outlet pipe, an igniter fixed to one side of the blower control box, an inlet pipe fixed to the surface of the blower control box; a pressure reducing and filtering assembly including a housing threadedly connected to one end of the inlet pipe, a cover threadedly connected to the top of the housing, a top cover threadedly connected to the outer ring of the cover, a pressure reducing component disposed inside the housing, a connecting pipe fixed to the inner cavity of the housing, a foolproof positioning hole opened on the surface of the connecting pipe, a filter component disposed at the bottom of the connecting pipe, an inlet component disposed on the surface of the filter component, a sealing component disposed at the bottom of the housing, and a locking component disposed at the bottom of one side of the housing.

[0008] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the pressure reducing component includes a first spring fixed inside the cover shell, a valve stem fixed to the bottom of the first spring, a stop plate sleeved on the outer ring of the valve stem, a valve core fixed to the bottom of the valve stem, and the valve core being located above the connecting pipe.

[0009] As a preferred embodiment of the ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel, as described in this invention, the filter element includes a fixed shell disposed within the inner cavity of the outer shell, a connector fixed to the top of the fixed shell, a foolproof positioning post fixed to the surface of the connector, an air outlet hole on the outer ring of the fixed shell, a retaining plate fixed to the bottom of one side of the fixed shell, a gas distributor disposed within the inner cavity of the fixed shell, filter cotton disposed inside the fixed shell, a square groove disposed at the bottom of the filter cotton, an air blowing element disposed on the surface of the gas distributor, a fixing element disposed at the bottom of the fixed shell, and an annular rod fixed to both the top and bottom of the inner cavity of the fixed shell, with a shielding element disposed on the surface of the annular rod.

[0010] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the gas distribution component includes an annular pipe fixed to the top of the inner cavity of the fixed shell, a bent pipe joint fixed to the top of the annular pipe, a sealing plate sleeved on the outer ring of the bent pipe joint, a vertical pipe fixed to the bottom of the annular pipe, a dustproof shell fixed to the inner wall of the fixed shell, guide columns rotatably connected to both sides of the bottom of the dustproof shell, and a diaphragm fixed to the surface of the dustproof shell.

[0011] As a preferred embodiment of the ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel, as described in this invention, the blowing component includes a flexible hose fixed to the surface of a vertical pipe, a nozzle fixed to one end of the flexible hose, a rotating frame fixedly fitted around the outer ring of the nozzle, a first torsion spring fitted to one end of the surface of the rotating frame, a second torsion spring fitted to the other end of the surface of the rotating frame, an impact hammer rotatably connected to the top of the surface of the rotating frame, one end of the first torsion spring fixed to the surface of the rotating frame, the other end of the first torsion spring fixed to the surface of the dust cover, one end of the second torsion spring fixed to the surface of the impact hammer, the other end of the second torsion spring fixed to the surface of the rotating frame, a vertical rod fixed to the bottom of one end of the nozzle, a protruding post fixed to the top of the other end of the nozzle, and a pull rope fixed to one end of the vertical rod.

[0012] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the fixing component includes a connecting ring threaded to the bottom of the inner cavity of the fixing shell, a connecting frame fixed to the inner ring of the connecting ring, a block fixed to the top of the connecting frame, the block being located inside the square groove, and the block being slidably connected to the inner wall of the square groove.

[0013] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the shielding component includes a sleeve plate slidably connected to the outer ring of the annular rod, a wind baffle plate is fixed on one side of the sleeve plate, the outer wall of the wind baffle plate is slidably connected to the inner wall of the fixed shell, a third spring is sleeved on the surface of the annular rod, one end of the third spring is fixed to the surface of the sleeve plate, and the other end of the third spring is fixed to the surface of the annular rod.

[0014] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the sealing element includes a sealing cover threaded to the bottom of the inner cavity of the outer shell, and an adsorption rod is fixed to the bottom of the inner cavity of the sealing cover.

[0015] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the locking component includes a pull ring rod slidably connected to the bottom of one side of the outer shell, one end of the pull ring rod is fixed with an inclined block, the inclined block is engaged with the surface of the locking plate, the outer ring of the pull ring rod is fitted with a second spring, one end of the second spring is fixed to the surface of the pull ring rod, and the other end of the second spring is fixed to the surface of the inclined block.

[0016] As a preferred embodiment of the ultra-low nitrogen burner applied to oilfield wellheads using associated gas as fuel according to the present invention, the air inlet component includes a vent pipe fixed inside the outer shell, one end of the vent pipe is fixed with a valve, and the other end of the vent pipe is fixed with a connector.

[0017] The beneficial effects of this invention are as follows: By setting pressure reducing components, the unstable and high-pressure gas source of associated gas from oil fields can be effectively reduced to the working pressure required by the burner, ensuring the stability of fuel delivery and combustion flame. Furthermore, the associated gas is filtered using filter components. When the burner is not working, high-pressure gas is introduced from an external high-pressure gas pump into the ventilation pipe, which, together with the air blowing component, performs backwashing on the surface of the filter cotton. This eliminates the need for workers to disassemble the filter components or use high-pressure gas or water to wash them externally, greatly saving workers' time in disassembling and assembling the filter structure. During the backwashing process, the impact force of the high-pressure gas causes the air blowing component to swing repeatedly, increasing the washing area and ensuring that the exterior of the filter cotton is cleaned. During the washing process, the wind baffle automatically moves, intermittently blocking the air outlet, allowing the interior of the fixed shell to be intermittently and briefly closed, forming a sealed chamber. This allows the high-pressure gas to stably impact the surface of the filter cotton, greatly improving the dust removal effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0020] Figure 2 This is another structural view of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0021] Figure 3 This is a cross-sectional view of the pressure-reducing filter assembly of an ultra-low nitrogen burner that uses associated gas as fuel at oilfield wellheads.

[0022] Figure 4 This is a structural diagram of the locking component of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0023] Figure 5 This is a structural diagram showing the combination of filter and air intake components for an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0024] Figure 6 This is a cross-sectional view of the filter element of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0025] Figure 7 This is a cross-sectional view of the fixed shell of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0026] Figure 8 For use in ultra-low NOx burners at oilfield wellheads that utilize associated gas as fuel Figure 7 A magnified view of A in the middle.

[0027] Figure 9 This is a structural diagram showing the combination of the gas distribution component and the gas inlet component in an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0028] Figure 10 For use in ultra-low NOx burners at oilfield wellheads that utilize associated gas as fuel Figure 9 A magnified view of B in the middle.

[0029] Figure 11 This is an exploded view of the filter cotton and fixtures for an ultra-low NOx burner used in oilfield wellheads that utilizes associated gas as fuel.

[0030] Figure 12 The image shows an exploded view of the filter cotton and fasteners of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0031] Figure 13 This is a structural diagram of the air blowing component of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0032] Figure 14 The image shows a bottom view of the blowing component of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0033] Figure 15 This is a structural diagram showing the shielding component and the connection state of the pull rope in an ultra-low nitrogen burner used at oilfield wellheads that utilizes associated gas as fuel.

[0034] Figure 16 This is a structural diagram of the sealing component of an ultra-low nitrogen burner used in oilfield wellheads that utilizes associated gas as fuel.

[0035] In the diagram: 1. Burner assembly; 11. Fan control box; 12. Outlet pipe; 13. Burner head; 14. Igniter; 15. Inlet pipe; 2. Pressure reducing and filtering assembly; 21. Housing; 22. Pressure reducing component; 221. Valve stem; 222. Stop plate; 223. Valve core; 224. First spring; 23. Connecting pipe; 24. Foolproof positioning hole; 25. Filter element; 251. Fixed housing; 252. Outlet; 253. Connecting pipe; 254. Foolproof positioning post; 255. Square groove; 256. Air blowing component; 2561. Rotating frame; 2562. Nozzle; 2563. Hose; 2564. Protruding post; 2565. Second torsion spring; 2566. Impact hammer; 2567. Vertical rod; 2568. First torsion spring; 257. Gas distribution component; 2571. 2572. Circular pipe; 2573. Vertical pipe; 2574. Bend joint; 2575. Sealing plate; 258. Fixing component; 2581. Connecting ring; 2582. Connecting frame; 2583. Square block; 259. Shielding component; 2591. Sleeve plate; 2592. Wind baffle; 2593. Third spring; 2510. Circular rod; 2511. Filter cotton; 2512. Dustproof shell; 2513. Guide post; 2514. Pull rope; 2515. Diaphragm; 2516. Clamping plate; 26. Sealing component; 261. Sealing cover; 262. Adsorption rod; 27. Locking component; 271. Pull ring rod; 272. Second spring; 273. Inclined block; 28. Air inlet component; 281. Vent pipe; 282. Valve; 283. Connector; 29. ​​Cover shell; 210. Top cover. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1, referring to Figures 1-3This is the first embodiment of the present invention. This embodiment provides an ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel. The ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel includes a burner assembly 1 and a pressure-reducing filter assembly 2. By setting the burner assembly 1 and the pressure-reducing filter assembly 2, the associated gas can be pressure-reduced and filtered, and then fully combusted by the burner, ensuring the stability of fuel delivery and combustion flame. Moreover, the filter components can be backwashed and dust removed without disassembling the filter components, effectively blowing off the dust attached to the surface of the filter components. During the backwashing process, the impact force of high-pressure gas causes the air blowing component to swing repeatedly, increasing the blowing area, which can ensure that the exterior of the filter cotton 2511 can be cleaned, greatly improving the cleaning effect. The connection between the air inlet component 28 and the air distribution component 257, and the installation and fixing of the filter component 25 are all done in one step, without spending extra time on multi-step installation. With the setting of the foolproof structure, the installation speed and installation accuracy are greatly improved.

[0040] Specifically, the burner assembly 1 includes a fan control box 11, an exhaust pipe 12 is fixed on one side of the fan control box 11, a burner head 13 is fitted around the outer ring of one end of the exhaust pipe 12, an igniter 14 is fixed on one side of the fan control box 11, and an intake pipe 15 is fixed on the surface of the fan control box 11. The structure and working principle of this part are all existing technologies, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0041] Specifically, the pressure-reducing filter assembly 2 includes a housing 21 threadedly connected to one end of the air inlet pipe 15, a cover 29 threadedly connected to the top of the housing 21, a top cover 210 threadedly connected to the outer ring of the cover 29, a pressure-reducing component 22 disposed inside the housing 21, a connecting pipe 23 fixed in the inner cavity of the housing 21, a foolproof positioning hole 24 opened on the surface of the connecting pipe 23, a filter 25 disposed at the bottom of the connecting pipe 23, an air inlet component 28 disposed on the surface of the filter 25, a sealing component 26 disposed at the bottom of the housing 21, and a locking component 27 disposed at the bottom of one side of the housing 21.

[0042] By setting the foolproof positioning hole 24, the filter element 25 can only be inserted in the designated position during installation, so that the air distribution element 257 and the air intake element 28 can be quickly aligned, which has a foolproof effect and makes it more convenient for users to use.

[0043] By setting the cover 29 and the top cover 210, the top of the outer shell 21 can be sealed to prevent gas from leaking from the top of the outer shell 21, and the pressure reducing component 22 can be limited to ensure stable pressure reduction.

[0044] Example 2, refer to Figures 2-16 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0045] Specifically, the pressure reducing component 22 includes a first spring 224 fixed inside the cover 29, a valve stem 221 fixed to the bottom of the first spring 224, a stop plate 222 sleeved on the outer ring of the valve stem 221, and a valve core 223 fixed to the bottom of the valve stem 221, with the valve core 223 located above the connecting pipe 23.

[0046] By setting the first spring 224, a spring force can be applied to the stop plate 222, so that it can buffer the high-pressure gas after being impacted by high-pressure gas, thereby achieving a pressure reduction effect.

[0047] Specifically, the filter element 25 includes a fixed shell 251 disposed in the inner cavity of the outer shell 21. A connector 253 is fixed to the top of the fixed shell 251. A foolproof positioning post 254 is fixed to the surface of the connector 253. An air outlet 252 is opened on the outer ring of the fixed shell 251. A retaining plate 2516 is fixed to the bottom of one side of the fixed shell 251. An air distribution component 257 is disposed in the inner cavity of the fixed shell 251. A filter cotton 2511 is disposed inside the fixed shell 251. A square groove 255 is opened at the bottom of the filter cotton 2511. An air blowing component 256 is disposed on the surface of the air distribution component 257. A fixing component 258 is disposed at the bottom of the fixed shell 251. A ring rod 2510 is fixed to both the top and bottom of the inner cavity of the fixed shell 251. A shielding component 259 is disposed on the surface of the ring rod 2510.

[0048] By inserting the pipe 253, the fixed shell 251 can be connected to the connecting pipe 23, and the gas can be guided into the filter cotton 2511, so that the filter cotton 2511 can filter the associated gas. By setting the foolproof positioning post 254, it can cooperate with the foolproof positioning hole 24, so that the fixed shell 251 can be connected to the connecting pipe 23 from the designated position.

[0049] Specifically, the gas distribution component 257 includes an annular pipe 2571 fixed to the top of the inner cavity of the fixed housing 251, a bent pipe joint 2573 fixed to the top of the annular pipe 2571, a sealing plate 2574 sleeved on the outer ring of the bent pipe joint 2573, a vertical pipe 2572 fixed to the bottom of the annular pipe 2571, a dustproof shell 2512 fixed to the inner wall of the fixed housing 251, guide posts 2513 rotatably connected to both sides of the bottom of the dustproof shell 2512, and a diaphragm 2515 fixed to the surface of the dustproof shell 2512.

[0050] The sealing plate 2574 is made of rubber. By setting the sealing plate 2574, it can be sealed after the elbow joint 2573 is connected to the connector 283, ensuring that gas will not leak from the connection between the elbow joint 2573 and the connector 283.

[0051] By setting up the dust cover 2512, the filter element 25 can be protected from dust, preventing dust from adhering to the surface of the filter element 25.

[0052] Specifically, the air blowing component 256 includes a flexible hose 2563 fixed to the surface of the vertical pipe 2572. A nozzle 2562 is fixed to one end of the flexible hose 2563. A rotating frame 2561 is fixedly sleeved around the outer ring of the nozzle 2562. A first torsion spring 2568 is sleeved on one end of the surface of the rotating frame 2561, and a second torsion spring 2565 is sleeved on the other end. An impact hammer 2566 is rotatably connected to the top of the surface of the rotating frame 2561. The first torsion spring 2568... One end is fixed to the surface of the rotating frame 2561, the other end of the first torsion spring 2568 is fixed to the surface of the dust cover 2512, one end of the second torsion spring 2565 is fixed to the surface of the impact hammer 2566, the other end of the second torsion spring 2565 is fixed to the surface of the rotating frame 2561, a vertical rod 2567 is fixed to the bottom of one end of the nozzle 2562, a protruding post 2564 is fixed to the top of the other end of the nozzle 2562, and a pull rope 2514 is fixed to one end of the vertical rod 2567.

[0053] By installing hose 2563, the nozzle 2562 can be unaffected when swinging and can always be connected to the vertical pipe 2572, ensuring continuous gas delivery.

[0054] The dust cover 2512 has a through hole on its surface at the nozzle 2562. The diaphragm 2515 is fixed inside the through hole. By setting the diaphragm 2515, the through hole can be sealed, the nozzle 2562 can be unaffected when it swings, and external impurities can be prevented from entering the dust cover 2512.

[0055] The impact hammer 2566 has air holes on its surface, so that the high-pressure gas can be discharged through the air holes after impacting the impact hammer 2566. By setting the impact hammer 2566, it can swing under the impact of high-pressure gas. The swing of the impact hammer 2566 can drive the nozzle 2562 to rotate, so that the nozzle 2562 can swing and perform large-area dust removal by spraying.

[0056] Specifically, the fastener 258 includes a connecting ring 2581 threaded to the bottom of the inner cavity of the fixed shell 251. A connecting bracket 2582 is fixed to the inner ring of the connecting ring 2581. A block 2583 is fixed to the top of the connecting bracket 2582. The block 2583 is located inside the square groove 255 and is slidably connected to the inner wall of the square groove 255.

[0057] By setting the square groove 255, after the square block 2583 is inserted, it can be ensured that the filter cotton 2511 and the connecting ring 2581 rotate synchronously, so that the filter cotton 2511 will not rotate after the connecting ring 2581 is installed, thus achieving a stable installation effect for the filter cotton 2511.

[0058] Specifically, the shielding component 259 includes a sleeve plate 2591 slidably connected to the outer ring of the annular rod 2510. A wind deflector 2592 is fixed on one side of the sleeve plate 2591. The outer wall of the wind deflector 2592 is slidably connected to the inner wall of the fixed shell 251. A third spring 2593 is sleeved on the surface of the annular rod 2510. One end of the third spring 2593 is fixed to the surface of the sleeve plate 2591, and the other end of the third spring 2593 is fixed to the surface of the annular rod 2510.

[0059] By setting the guide post 2513, the pull rope 2514 can be guided, so that the pull rope 2514 can be pulled in a specified direction and drive the wind deflector 2592 to move. By setting the sleeve plate 2591, the wind deflector 2592 can be moved along the surface of the ring rod 2510, so that the wind deflector 2592 can be tightly attached to the inner wall of the fixed shell 251.

[0060] Specifically, the sealing element 26 includes a sealing cover 261 threaded to the bottom of the inner cavity of the housing 21, and an adsorption rod 262 is fixed to the bottom of the inner cavity of the sealing cover 261.

[0061] The surface of the adsorption rod 262 is coated with a high-viscosity adhesive, which can effectively adhere to the cleaned impurities and prevent them from floating again. The outer ring of the sealing cover 261 is fitted with a sealing ring, which can effectively seal the cover after it is screwed into the bottom of the outer shell 21.

[0062] Specifically, the locking component 27 includes a pull ring rod 271 slidably connected to the bottom of one side of the housing 21. One end of the pull ring rod 271 is fixed with a wedge block 273, which is engaged with the surface of the locking plate 2516. A second spring 272 is sleeved on the outer ring of the pull ring rod 271. One end of the second spring 272 is fixed to the surface of the pull ring rod 271, and the other end of the second spring 272 is fixed to the surface of the wedge block 273. An annular groove is machined on the housing 21 at the position of the pull ring rod 271, and an elastic O-ring is inserted into it. The pull ring rod 271 passes through the inner hole of the O-ring. The O-ring relies on its own compression elastic deformation to tightly hug the surface of the pull ring rod 271, forming a seal, which can prevent the gas inside the housing 21 from leaking from the connection between the pull ring rod 271 and the housing 21.

[0063] Specifically, the air intake component 28 includes a vent pipe 281 fixed inside the housing 21. A valve 282 is fixed at one end of the vent pipe 281, and a connector 283 is fixed at the other end of the vent pipe 281. The valve 282 will only open during combustion cleaning to ensure that gas will not leak from the vent pipe 281 when the burner is working. The connection between the vent pipe 281 and the housing 21 is sealed.

[0064] Example 3, referring to Figures 2-16 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0065] Specifically, the ignition end of the igniter 14 is located on one side of the burner head 13. The diaphragm 2515 is made of polyurethane elastomer, which can withstand a certain pressure and can automatically recover after being stretched. One end of the pull rope 2514 passes around the guide post 2513 and is fixed to the surface of the wind deflector 2592. The wind deflector 2592 is located on one side of the air outlet 252.

[0066] Specifically, one end of the bend fitting 2573 is inserted into the inner cavity of the connector 283. The entrance of the connector 283 is beveled at 45°. This bevel allows the bend fitting 2573 to enter the connector 283 more easily for connection, ensuring connection accuracy. Both the connector 283 and the bend fitting 2573 have an arc-shaped connection. The connector 283, the bend fitting 2573, and the fixed housing 251 are concentrically arranged. The connector 283 and the bend fitting 2573 share a common center. This arrangement allows the bend fitting 2573 to automatically align with the connector 283 as the fixed housing 251 rotates.

[0067] Specifically, the outer wall of the insertion pipe 253 fits into the inner wall of the filter cotton 2511 inlet. This arrangement allows the gas passing through the insertion pipe 253 to better enter the filter cotton 2511, facilitating subsequent filtration. The outer ring of the connecting ring 2581 and the inner ring of the fixed shell 251 are connected by threads. The outer ring of the sealing cover 261 and the bottom of the outer shell 21 are connected by threads. One end of the rotating bracket 2561 is rotatably connected to the bottom of the inner cavity of the dustproof shell 2512 via a bearing. The aforementioned threaded connection method ensures stable and rapid installation of each component.

[0068] In use, place the filter cotton 2511 inside the fixing housing 251, insert the connector 253 into the inlet of the filter cotton 2511, and then place the fixing piece 258 at the bottom of the fixing housing 251, insert the block 2583 into the square groove 255 at the bottom of the filter cotton 2511, rotate the connecting ring 2581 so that it is threaded into the bottom of the inner cavity of the fixing housing 251, and the filter cotton 2511 rotates together with the connecting ring 2581. When the connecting ring 2581 is completely screwed into the fixing housing 251, the filter cotton 2511 can no longer rotate and is thus fixed.

[0069] When the fixing shell 251 is inserted from the bottom of the outer shell 21, and the insertion tube 253 on the top of the fixing shell 251 is moved to the bottom of the connecting tube 23, the insertion tube 253 cannot be inserted into the connecting tube 23 due to the blocking effect of the anti-fooling positioning post 254. Simply rotate the fixing shell 251 counterclockwise so that the anti-fooling positioning post 254 on the surface of the insertion tube 253 rotates to the anti-fooling positioning hole 24 on the surface of the connecting tube 23. At this time, the anti-fooling positioning post 254 can pass through the inside of the anti-fooling positioning hole 24.

[0070] Then push the insertion tube 253 into the connecting tube 23. When the foolproof positioning pin 254 moves to the bend of the foolproof positioning hole 24, it can no longer be pushed in. At this time, the connector 283 and the bent pipe connector 2573 are exactly on the same horizontal plane. Then continue to rotate the fixing shell 251 counterclockwise. During this process, the card plate 2516 at the bottom of the fixing shell 251 will contact the inclined block 273 and squeeze it under the action of the inclined plane, so that the inclined block 273 drives the pull ring rod 271 to move outward. At the same time, the second spring 272 is compressed until the foolproof positioning pin 254 rotates to the end of the foolproof positioning hole 24.

[0071] During rotation, the bent pipe joint 2573 on the surface of the fixed shell 251 rotates accordingly and extends into the connector 283. Finally, the sealing plate 2574 just covers the interface position to seal it, and the clamping plate 2516 just disengages from the inclined block 273, causing the second spring 272 to rebound and drive the inclined block 273 to reset. At this time, the inclined block 273 blocks the clamping plate 2516, preventing it from rotating in the opposite direction. The foolproof positioning post 254 cannot move downward in the foolproof positioning hole 24, so the fixed shell 251 is fixed at this time. Finally, the sealing cover 261 is connected to the bottom of the outer shell 21 by threads.

[0072] High-pressure associated gas enters the housing 21 through the inlet of the housing 21. The stop plate 222 inside moves upward under pressure, which drives the valve stem 221 to move upward, causing it to squeeze the first spring 224. At this time, the high-pressure gas is depressurized by the resistance of the stop plate 222. The valve stem 221 drives the valve core 223 to move upward, causing it to disengage from the inlet of the connecting pipe 23.

[0073] After the inlet of the connecting pipe 23 is opened, the gas enters the inside of the insertion pipe 253 through the connecting pipe 23 and then enters the inside of the filter cotton 2511. After being filtered by the filter cotton 2511, the gas is discharged from the outlet 252 to the lower part of the inner cavity of the outer shell 21, and enters the inlet pipe 15 through the outlet of the outer shell 21 to provide the burner assembly 1 with filtered associated gas as a gas source. Then, the associated gas is discharged to the burner head 13 through the outlet pipe 12 via the fan control box 11. At this time, the igniter 14 can be turned on through the control panel on the surface of the fan control box 11 to start continuous combustion.

[0074] When the filter cotton 2511 needs to be cleaned, turn off the burner, connect the external high-pressure air pump to the air pipe 281 through the pipe, and open the valve 282. The external high-pressure gas enters the annular pipe 2571 through the air pipe 281, connector 283 and elbow joint 2573, and then enters the nozzle 2562 through the vertical pipe 2572 and hose 2563 in sequence.

[0075] The high-pressure gas ejected from the nozzle 2562 impacts the surface of the impact hammer 2566, causing the impact hammer 2566 to rotate and the second torsion spring 2565 to twist. At this time, the impact hammer 2566 is freed from the impact of the high-pressure gas and is driven to reset by the action of the second torsion spring 2565. During the reset process, the end of the impact hammer 2566 contacts the protrusion 2564 and impacts it.

[0076] After the protrusion 2564 is impacted, the nozzle 2562 rotates due to inertia. The nozzle 2562 drives the rotating frame 2561 to rotate, causing the first torsion spring 2568 to twist. Since the impact force on the protrusion 2564 is limited, when the nozzle 2562 rotates to a certain angle, the reaction force of the first torsion spring 2568 will stop the nozzle 2562 from rotating. At this time, the first torsion spring 2568 resets and drives the nozzle 2562 to reset to its original state.

[0077] In its original state, the nozzle 2562 will impact the impact hammer 2566, causing it to repeat the above rotation action, thereby making the nozzle 2562 swing back and forth, so that the nozzle 2562 can back-flush the outer wall of the filter cotton 2511 from the outside to the inside over a larger range. During the rotation of the nozzle 2562 around the rotating frame 2561, it will drive the vertical rod 2567 at its bottom to move together, and then the vertical rod 2567 will pull the pull rope 2514.

[0078] Guided by the guide column 2513, the baffle plate 2592 is moved. The baffle plate 2592 drives the sleeve plate 2591 to squeeze the third spring 2593, causing the third spring 2593 to compress. At this time, the baffle plate 2592 briefly blocks the air outlet 252, creating a closed space inside the fixed shell 251. This allows the nozzle 2562 to briefly blow on the surface of the filter cotton 2511 within the closed space, thus more effectively blowing off the dust on its surface.

[0079] When the nozzle 2562 is reset, the pull rope 2514 loses its traction on the baffle plate 2592, causing the third spring 2593 to rebound and drive the baffle plate 2592 to move away from the surface of the air outlet 252 for reset. The cleaned dust falls into the interior of the sealing cover 261 and is adsorbed by the adsorption rod 262, preventing it from floating again.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An ultra-low nitrogen burner used at oilfield wellheads to utilize associated gas as fuel, characterized in that: include, The burner assembly (1) includes a fan control box (11), an exhaust pipe (12) is fixed on one side of the fan control box (11), a burner head (13) is fitted around one end of the exhaust pipe (12), an igniter (14) is fixed on one side of the fan control box (11), and an intake pipe (15) is fixed on the surface of the fan control box (11). The pressure-reducing filter assembly (2) includes a housing (21) threaded to one end of an air inlet pipe (15), a cover (29) threaded to the top of the housing (21), a top cover (210) threaded to the outer ring of the cover (29), a pressure-reducing component (22) provided inside the housing (21), a connecting pipe (23) fixed in the inner cavity of the housing (21), a foolproof positioning hole (24) provided on the surface of the connecting pipe (23), a filter (25) provided at the bottom of the connecting pipe (23), an air inlet component (28) provided on the surface of the filter (25), a sealing component (26) provided at the bottom of the housing (21), and a locking component (27) provided at the bottom of one side of the housing (21). The filter element (25) includes a fixed shell (251) disposed in the inner cavity of the outer shell (21). A connector (253) is fixed to the top of the fixed shell (251). A foolproof positioning post (254) is fixed to the surface of the connector (253). An air outlet (252) is opened on the outer ring of the fixed shell (251). A retaining plate (2516) is fixed to the bottom of one side of the fixed shell (251). An air distribution element (257) is disposed in the inner cavity of the fixed shell (251). The fixed shell (251) is provided with a filter cotton (2511) inside, and a square groove (255) is provided at the bottom of the filter cotton (2511). The air distribution component (257) is provided with an air blowing component (256) on its surface. The fixed shell (251) is provided with a fixing component (258) at its bottom. The top and bottom of the inner cavity of the fixed shell (251) are both fixed with an annular rod (2510), and the surface of the annular rod (2510) is provided with a shielding component (259). The gas distribution component (257) includes an annular tube (2571) fixed to the top of the inner cavity of the fixed shell (251). A bend joint (2573) is fixed to the top of the annular tube (2571). A sealing plate (2574) is sleeved on the outer ring of the bend joint (2573). A vertical tube (2572) is fixed to the bottom of the annular tube (2571). A dustproof shell (2512) is fixed to the inner wall of the fixed shell (251). Guide columns (2513) are rotatably connected to both sides of the bottom of the dustproof shell (2512). A diaphragm (2515) is fixed to the surface of the dustproof shell (2512). The air blowing component (256) includes a flexible hose (2563) fixed to the surface of a vertical pipe (2572). A nozzle (2562) is fixed to one end of the flexible hose (2563). A rotating frame (2561) is fixedly fitted around the outer ring of the nozzle (2562). A first torsion spring (2568) is fitted to one end of the surface of the rotating frame (2561), and a second torsion spring (2565) is fitted to the other end. An impact hammer (2566) is rotatably connected to the top of the surface of the rotating frame (2561). The first torsion spring (2568)... One end of the first torsion spring (2568) is fixed to the surface of the rotating frame (2561), the other end of the second torsion spring (2565) is fixed to the surface of the dust cover (2512), one end of the second torsion spring (2565) is fixed to the surface of the impact hammer (2566), the other end of the second torsion spring (2565) is fixed to the surface of the rotating frame (2561), a vertical rod (2567) is fixed to the bottom of one end of the nozzle (2562), a protruding post (2564) is fixed to the top of the other end of the nozzle (2562), and a pull rope (2514) is fixed to one end of the vertical rod (2567). The shield (259) includes a sleeve (2591) slidably connected to the outer ring of the annular rod (2510), a wind deflector (2592) fixed on one side of the sleeve (2591), the outer wall of the wind deflector (2592) slidably connected to the inner wall of the fixed shell (251), a third spring (2593) sleeved on the surface of the annular rod (2510), one end of the third spring (2593) fixed to the surface of the sleeve (2591), and the other end of the third spring (2593) fixed to the surface of the annular rod (2510); The locking component (27) includes a pull ring rod (271) slidably connected to the bottom of one side of the housing (21). One end of the pull ring rod (271) is fixed with a wedge block (273). The wedge block (273) is engaged with the surface of the card plate (2516). The outer ring of the pull ring rod (271) is fitted with a second spring (272). One end of the second spring (272) is fixed to the surface of the pull ring rod (271), and the other end of the second spring (272) is fixed to the surface of the wedge block (273). The air intake component (28) includes a vent pipe (281) fixed inside the housing (21), with a valve (282) fixed at one end of the vent pipe (281) and a connector (283) fixed at the other end of the vent pipe (281).

2. The ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel, as described in claim 1, is characterized in that: The pressure reducing component (22) includes a first spring (224) fixed inside the cover (29), a valve stem (221) fixed to the bottom of the first spring (224), a stop plate (222) sleeved on the outer ring of the valve stem (221), a valve core (223) fixed to the bottom of the valve stem (221), and the valve core (223) located above the connecting pipe (23).

3. The ultra-low nitrogen burner for use in oilfield wellheads using associated gas as fuel, as described in claim 1, is characterized in that: The fastener (258) includes a connecting ring (2581) threaded to the bottom of the inner cavity of the fixed shell (251). A connecting frame (2582) is fixed to the inner ring of the connecting ring (2581). A block (2583) is fixed to the top of the connecting frame (2582). The block (2583) is located inside the square groove (255) and is slidably connected to the inner wall of the square groove (255).

4. The ultra-low nitrogen burner as described in claim 1, applied to oilfield wellheads using associated gas as fuel, characterized in that: The sealing element (26) includes a sealing cap (261) threaded to the bottom of the inner cavity of the outer shell (21), and an adsorption rod (262) is fixed to the bottom of the inner cavity of the sealing cap (261).

Images