An adjustable fuel gas lance and burner therefor

Abstract

This utility model discloses an adjustable fuel gas spray gun and its burner. The adjustable fuel gas spray gun includes: an ignition tube, a middle medium tube, a fuel gas tube, a regulating component, and a flow control component. The ignition tube, middle medium tube, and fuel gas tube are sequentially nested within each other. The flow control component is disposed in a first channel between the fuel gas tube and the middle medium tube. The driving end of the regulating component is inserted into the fuel gas tube and drivenly connected to the flow control component, driving the flow control component to move within the first channel and adjust the opening size of the first channel. This allows for real-time adjustment of the fuel gas flow rate according to operating conditions to adapt the burner to achieve optimal performance.

Description

Technical Field

[0001] This utility model relates to burner technology, and more particularly to an adjustable fuel flow rate spray gun and its burner. Background Technology

[0002] In many industrial applications, burners need to operate under different conditions, such as load changes and changes in fuel type. However, the flow area of ​​traditional burners using fuel gas nozzles is fixed, so the medium flow rate is determined based on the upstream medium of the system. Its optimal operating range is very limited, and the fuel flow rate cannot be adjusted under low or high loads. Therefore, it is impossible to control the optimal mixing ratio of fuel and air in the combustion chamber, which easily leads to incomplete combustion and generally fails to meet optimal usage requirements and environmental and safety requirements.

[0003] Although some existing fuel gas injection gun solutions claim to support "adjustable" functionality, the adjustment methods have significant shortcomings. Adjustment requires stopping the machine, disassembling the equipment, or replacing parts. This not only directly leads to production interruptions and affects continuous operation efficiency but also increases labor costs, equipment start-up and shutdown costs, and time costs, making it difficult to meet the actual needs of industrial scenarios for dynamic and efficient adjustment.

[0004] Therefore, how to design an adjustable fuel gas injection gun that can support real-time adjustment of fuel gas flow rate according to operating conditions to adapt to the burner and achieve optimal performance is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, the main objective of this utility model is to provide an adjustable fuel gas injection gun and its burner to solve the related technical problems mentioned in the background art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an adjustable fuel gas spray gun is provided, comprising: an ignition tube, a middle medium tube, a fuel gas tube, a regulating component, and a flow control component, wherein the ignition tube, the middle medium tube, and the fuel gas tube are sequentially nested within each other, and the flow control component is disposed in a first channel between the fuel gas tube and the middle medium tube. The driving end of the regulating component is inserted into the fuel gas tube and is drivingly connected to the flow control component, thereby driving the flow control component to move within the first channel and adjusting the opening size of the first channel.

[0007] Preferably, the flow control component includes: a flow limiting tube, a flow guiding cone tube, and a first swirl vane, wherein the flow guiding cone tube is disposed at the front end of the flow limiting tube, the first swirl vane is circumferentially spaced on the outer wall of the flow limiting tube, a sliding wall is provided on the wall of the middle layer medium tube, the flow limiting tube is sleeved on the middle layer medium tube and supported by the sliding wall, and a second channel and a third channel are separated in the first channel, the flow limiting tube is connected to the transmission end of the control component so as to be driven to move along the sliding wall, and the opening degree of the third channel is adjusted by the flow guiding cone tube.

[0008] Preferably, the outer wall of the middle medium tube in the second channel is provided with second swirl blades spaced apart circumferentially.

[0009] Preferably, the adjustable fuel gas spray gun further includes: a nozzle, which has a guide tube at its front end that is tapered and outwardly flared, and a cap with holes at its rear end. The guide tube is sleeved on the outside of the ignition tube, and the cap with holes is sealed at the opening of the middle medium tube.

[0010] Preferably, the control component includes: a slide rail module, a connecting rod, a push rod, an adjusting bracket, and an adjusting nut, wherein the slide rail module is disposed on the outer wall of the middle medium pipe, the front end of the push rod passes through the flange of the fuel gas pipe and is connected to the slider of the slide rail module, the slider is connected to the flow control component via the connecting rod, the adjusting bracket is fixed on the flange, and the rear end of the push rod is provided with an external thread to pass through the adjusting bracket and mate with the adjusting nut.

[0011] Preferably, the control assembly further includes: packing material, stuffing box, and gland; the flange of the fuel gas pipe is provided with a countersunk hole; the front end of the packing material is inserted into the countersunk hole and sleeved on the outside of the push rod; the stuffing box is clamped on the rear end of the packing material; the gland is sleeved on the outside of the push rod; and the gland is inserted into the rear end of the packing material and sealed with the stuffing box.

[0012] Preferably, an intermediate frame is provided on the outer wall of the middle medium pipe, and the push rod is suspended in the fuel gas pipe via the intermediate frame.

[0013] Preferably, the control component further includes: a pointer and a scale plate, the pointer being fixed on a push rod, the scale plate being fixed on an adjustment bracket, the adjustment bracket being provided with a travel window corresponding to the scale plate, and the pointer moving within the travel window as the push rod extends and retracts.

[0014] To achieve the above objectives, according to another aspect of the present invention, a burner is provided, which includes an adjustable fuel gas nozzle as described above.

[0015] The adjustable fuel gas nozzle and burner provided by this invention, through ingenious design, place the control components outside the fuel gas pipe, allowing direct control of the flow control components inside the nozzle to adjust the opening and closing degree of the fuel gas pipe outlet. This innovative design achieves the core advantage of eliminating the need for shutdown and disassembly for adjustment, and can dynamically and precisely adjust the fuel flow rate according to the actual operating conditions of the combustion furnace, ensuring the optimal mixing ratio of fuel and air in the combustion chamber, thereby promoting complete combustion. This not only effectively reduces the generation and emission of pollutants and improves the cleanliness of the combustion process, but also ensures stable and efficient operation of the burner under various operating conditions, while precisely meeting increasingly stringent environmental standards. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the adjustable fuel gas spray gun of this utility model.

[0018] Figure 2 This is a perspective structural diagram of the adjustable fuel gas spray gun of this utility model.

[0019] Figure 3 This is a half-sectional schematic diagram of the adjustable fuel gas spray gun of this utility model.

[0020] Figure 4 This is a half-sectional schematic diagram of the control component of the adjustable fuel gas spray gun of this utility model.

[0021] Figure 5 This is a perspective view of the control component of the adjustable fuel gas spray gun of this utility model.

[0022] Figures 6 to 7 This is a half-sectional structural diagram of the flow control component of the adjustable fuel gas spray gun of this utility model, showing the degree of opening and closing of the third channel.

[0023] Explanation of reference numerals in the attached figures

[0024] Ignition tube 1, middle medium tube 2, fuel gas tube 3, control assembly 4, flow control assembly 5, nozzle 6, sliding wall 21, second channel 22, third channel 23, intermediate frame 24, flange ring 31, slide rail module 41, connecting rod 42, push rod 43, adjusting bracket 44, adjusting nut 45, packing 46, stuffing box 47, gland 48, pointer 49, scale plate 50, flow limiting tube 51, flow guide cone 52, first swirl vane 53, second swirl vane 54, flow guide tube 61, perforated cap 62. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "lay out," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances and in conjunction with existing technology. Furthermore, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. One or more of the components shown in the figures may be necessary or not, and the relative positional relationships between the components shown in the figures can be adjusted according to actual needs.

[0031] In order to support real-time adjustment of fuel flow rate according to operating conditions, so as to adapt the burner to achieve optimal operating requirements, such as Figures 1 to 5 As shown, this utility model provides an adjustable fuel gas spray gun, which includes: an ignition tube 1, a middle medium tube 2, a fuel gas tube 3, a regulating component 4, and a flow control component 5.

[0032] Among them, such as Figures 1 to 3 As shown, the ignition tube 1, the middle medium tube 2, and the fuel gas tube 3 are sequentially nested together. The flow control component 5 is disposed in the first channel defined by the interlayer between the fuel gas tube 3 and the middle medium tube 2. The transmission end of the control component 4 is inserted into the fuel gas tube 3 and is connected to the flow control component 5 for transmission, thereby driving the flow control component 5 to move within the first channel and adjusting the opening size of the first channel.

[0033] Specifically, such as Figures 2 to 3 As shown, the flow control component 5 includes: a flow limiting tube 51, a flow guiding cone tube 52, and a first swirl vane 53. The flow guiding cone tube 52 is disposed at the front end of the flow limiting tube 51. A sliding wall 21 is provided on the wall of the middle medium tube 2. The flow limiting tube 51 is sleeved on the outside of the middle medium tube 2 and supported by the sliding wall 21. A second channel 22 and a third channel 23 are separated in the first channel. The first swirl vane 53 is arranged circumferentially on the outer wall of the flow limiting tube 51 to set the third channel 23 as a swirl channel. The flow limiting tube 51 is connected to the transmission end of the control component 4 so as to be driven to move back and forth along the sliding wall 21. The flow guiding cone tube 52 is manipulated to adjust the opening degree of the third channel 23 by utilizing its special shape, so as to change the cross-sectional area of ​​the flow channel in the fuel gas pipe 3. By controlling the area of ​​the flow channel, the flow velocity of the medium can be changed when the medium passes through it, thereby realizing the flow velocity regulation of the fuel gas pipe 3.

[0034] Furthermore, in order to increase the mixing effect of fuel and air, in an optional embodiment, second swirl blades 54 are arranged circumferentially on the outer wall of the middle medium pipe 2 in the second channel 22, so that the second channel 22 is also set as a swirl channel.

[0035] Furthermore, in order to promote the mixing of the medium and fuel gas transported in the middle layer medium pipe 2, such as... Figures 2 to 3 , Figures 6 to 7 As shown, the adjustable fuel gas spray gun further includes: a nozzle 6, with a conical outward-expanding guide tube 61 at its front end and a perforated cap 62 at its rear end. The guide tube 61 is sleeved on the outside of the ignition tube 1, and the perforated cap 62 seals the opening of the middle medium tube 2. The inclination of the guide tube 61 is consistent with that of the guide cone tube 52 to form a mixing flare zone, which promotes the mixing of the medium transported by the middle medium tube 2 with the fuel gas.

[0036] Furthermore, such as Figures 3 to 5 As shown, the control component 4 includes: a slide rail module 41, a connecting rod 42, a push rod 43, an adjusting bracket 44, and an adjusting nut 45. The slide rail module 41 is disposed on the outer wall of the middle medium pipe 2. The front end of the push rod 43 passes through the flange ring 31 of the fuel gas pipe 3 and is connected to the slider of the slide rail module 41. The slider is axially connected to the flow limiting pipe 51 via the connecting rod 42 to form a transmission. The adjusting bracket 44 is fixed on the flange ring 31. The rear end of the push rod 43 is provided with an external thread to pass through the adjusting bracket 44 and mate with the adjusting nut 45.

[0037] Furthermore, to prevent the push rod 43 from becoming too long and bending inside the fuel gas pipe 3, in optional embodiments, such as Figure 3 As shown, an intermediate frame 24 is provided on the outer wall of the middle medium pipe 2, and the push rod 43 is suspended in the fuel gas pipe 3 via the intermediate frame 24.

[0038] With this configuration, when the adjusting nut 45 is rotated, the push rod 43 will be moved horizontally and the slider of the slide rail module 41 will be moved, thereby causing the connecting rod 42 to pull / push the flow limiting tube 51 to move back and forth along the sliding wall 21, so as to drive the guide cone tube 52 to adjust the opening degree of the third channel 23 to achieve the flow rate regulation of the fuel gas pipe 3.

[0039] Furthermore, to ensure the sealing of fuel line 3, such as... Figure 4 As shown, in an optional embodiment, the control component 4 further includes: packing 46, stuffing box 47, and gland 48. The flange 31 of the fuel gas pipe 3 is provided with a countersunk hole. The front end of the packing 46 is inserted into the countersunk hole and sleeved on the outside of the push rod 43. The stuffing box 47 is clamped on the rear end of the packing 46. The gland 48 is sleeved on the outside of the push rod 43 and is inserted into the rear end of the packing 46 and sealed with the stuffing box 47, thereby forming a seal between the flange 31 and the push rod 43 to prevent fuel gas leakage.

[0040] Furthermore, to facilitate control of adjustment precision, such as Figure 5 As shown, in an optional embodiment, the control component 4 further includes: a pointer 49 and a scale plate 50. The pointer 49 is fixed on the push rod 43, and the scale plate 50 is fixed on the adjustment bracket 44. The adjustment bracket 44 is provided with a travel window corresponding to the scale plate 50. The pointer 49 moves within the travel window as the push rod 43 extends and retracts, and points to the corresponding scale on the scale plate 50, so as to observe the displacement distance and position of the current flow restrictor 51, thereby accurately controlling the flow rate of the fuel gas pipe 3.

[0041] In fluid mechanics, the relationship between flow rate, flow velocity, and flow area is a fundamental core formula that applies to the steady-state flow of various fluids such as liquids and gases (where flow velocity and flow rate do not change over time). Its essence is the embodiment of "conservation of fluid mass / volume".

[0042] Basic formula: Q volumetric flow rate = v velocity × A flow area

[0043] From the derivation of the formula above, we can see that:

[0044] When V remains constant: if A increases, Q increases accordingly; if A decreases, Q decreases accordingly.

[0045] When the Q value remains constant: if the A value increases, the v value decreases accordingly; if the A value decreases, the v value increases accordingly.

[0046] In burner applications, the load depends on the amount of upstream medium, not on the burner itself; the burner merely acts as an adaptor. Under any operating condition, the upstream medium flow rate fluctuates but generally tends towards a constant value. During the flow through the cyclone separator, the overall medium flow rate remains constant. Therefore, the function of the entire cyclone separator is closer to the second scenario where the Q value remains constant; the first scenario, where the v value remains constant, only exists in ideal models.

[0047] By applying the above conclusions to the adjustable fuel gas spray gun, the forward and backward movement of the guide cone 52 can change the size of the flow channel. Since the upstream medium flow rate remains constant, when the flow channel area decreases, the medium flow velocity will increase, and when the flow channel area increases, the medium flow velocity will decrease.

[0048] Extending the above conclusions further, when the upstream medium flow rate is low, the medium velocity at the nozzle tip is low. When the medium passes through the nozzle, it needs to be accelerated while maintaining a constant flow rate, so the nozzle needs to be closed slightly. When the upstream medium flow rate is high, the medium velocity at the nozzle tip is high. When the medium passes through the nozzle, it needs to be decelerated while maintaining a constant flow rate, so the nozzle needs to be opened wider. This is the working principle of the adjustable fuel gas nozzle in actual operation.

[0049] In the adjustable fuel gas nozzle provided in the above example, during adjustment, rotating the adjusting nut 45 generates a forward thrust or a backward pull force on the push rod 43. Through a series of transmissions, this thrust or pull force is transmitted to the movable guide cone 52, which moves forward or backward under the action of force. During this movement, due to the special shape of the guide cone 52, the cross-sectional area of ​​the fuel gas pipe 3 flow channel also changes accordingly. Therefore, by controlling the area of ​​the flow channel, the flow velocity of the medium passing through it can be changed.

[0050] Therefore, based on the different medium flow rates required by the burner under different load conditions, the guide cone 52 can be adjusted to the most suitable position according to different operating conditions, so that the burner can achieve its optimal working state under this condition. At the same time, through the setting of the first and second swirl vanes 53 and 54, regardless of the position of the guide cone 52, the first and second swirl vanes 53 and 54 and their end taper can always control the flowing medium to rotate and spray out at the optimal speed. This allows the outflowing medium to mix more thoroughly with the other gases, resulting in greater combustion intensity and deeper reaction.

[0051] In addition, depending on the different operating conditions or combustion furnace model requirements, the inlet medium of this adjustable fuel gas nozzle can be gas or other media, such as exhaust gas, acid gas, or other low-pressure gases.

[0052] On the other hand, the present invention also provides a burner comprising an adjustable fuel gas nozzle as described above.

[0053] In summary, the adjustable fuel gas nozzle and burner provided by this invention, through ingenious design, place the control components outside the fuel gas pipe and allow direct control of the flow control components inside the nozzle to adjust the opening and closing degree of the fuel gas pipe outlet. This innovative design achieves the core advantage of eliminating the need for shutdown and disassembly for adjustment, and can dynamically and precisely adjust the fuel flow rate according to the actual operating conditions of the combustion furnace, ensuring the optimal mixing ratio of fuel and air in the combustion chamber, thereby promoting complete combustion. This not only effectively reduces the generation and emission of pollutants and improves the cleanliness of the combustion process, but also ensures stable and efficient operation of the burner under various operating conditions, while precisely meeting increasingly stringent environmental standards.

[0054] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0055] Furthermore, various different implementation methods of this utility model can be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An adjustable fuel gas lance characterized by include: The device comprises an ignition tube, a middle medium tube, a fuel gas tube, a regulating component, and a flow control component, wherein the ignition tube, the middle medium tube, and the fuel gas tube are sequentially nested within each other. The flow control component is disposed in a first channel between the fuel gas tube and the middle medium tube. The driving end of the regulating component is inserted into the fuel gas tube and is connected to the flow control component for transmission, thereby driving the flow control component to move within the first channel and adjusting the opening size of the first channel.

2. The adjustable fuel gas injection lance according to claim 1, characterized in that The flow control assembly includes: a flow limiting tube, a flow guiding cone, and a first swirl vane. The flow guiding cone is disposed at the front end of the flow limiting tube. The first swirl vane is circumferentially spaced on the outer wall of the flow limiting tube. A sliding wall is provided on the wall of the middle medium tube. The flow limiting tube is sleeved on the outside of the middle medium tube and supported by the sliding wall. A second channel and a third channel are separated in the first channel. The flow limiting tube is connected to the transmission end of the control assembly so that it can be driven to move along the sliding wall and adjust the opening degree of the third channel through the flow guiding cone.

3. The adjustable fuel gas injection lance according to claim 2, wherein, The outer wall of the middle medium tube in the second channel is provided with second swirl blades arranged circumferentially.

4. An adjustable fuel gas injection lance according to any of claims 1 or 3, characterized in that, It also includes: a nozzle, which has a guide tube at the front end that is tapered and expands outward, and a cap with holes at the rear end. The guide tube is sleeved on the outside of the ignition tube, and the cap with holes is sealed at the opening of the middle medium tube.

5. The adjustable fuel gas injection lance of claim 1, wherein, The control component includes: a slide rail module, a connecting rod, a push rod, an adjusting bracket, and an adjusting nut. The slide rail module is disposed on the outer wall of the middle medium pipe. The front end of the push rod passes through the flange of the fuel gas pipe and is connected to the slider of the slide rail module. The slider is connected to the flow control component via the connecting rod. The adjusting bracket is fixed on the flange. The rear end of the push rod is provided with an external thread to pass through the adjusting bracket and mate with the adjusting nut.

6. The adjustable fuel gas spray gun according to claim 5, characterized in that, The control assembly also includes: packing material, stuffing box, and gland. The flange of the fuel gas pipe is provided with a countersunk hole. The front end of the packing material is inserted into the countersunk hole and sleeved on the outside of the push rod. The stuffing box is clamped on the rear end of the packing material. The gland is sleeved on the outside of the push rod and is inserted into the rear end of the packing material and sealed with the stuffing box.

7. The adjustable fuel gas spray gun according to claim 5, characterized in that, An intermediate frame is provided on the outer wall of the middle medium pipe, and the push rod is suspended in the fuel gas pipe via the intermediate frame.

8. The adjustable fuel gas spray gun according to any one of claims 5 to 6, characterized in that, The control component also includes: a pointer and a scale plate. The pointer is fixed on the push rod, and the scale plate is fixed on the adjustment bracket. The adjustment bracket is provided with a travel window corresponding to the scale plate. The pointer moves within the travel window as the push rod extends and retracts.

9. A burner, characterized in that... Includes the adjustable fuel gas spray gun as described in any one of claims 1 to 8.

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