CN211739079U - Environment-friendly is from inhaling formula oil field heating furnace burner structure - Google Patents
Environment-friendly is from inhaling formula oil field heating furnace burner structure Download PDFInfo
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- CN211739079U CN211739079U CN202020278567.6U CN202020278567U CN211739079U CN 211739079 U CN211739079 U CN 211739079U CN 202020278567 U CN202020278567 U CN 202020278567U CN 211739079 U CN211739079 U CN 211739079U
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Abstract
The utility model discloses an environment-friendly self-suction type oil field heating furnace burner structure, which comprises a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure; the central fuel gas channel structure includes: the fuel distributor comprises a central fuel gas channel, an outer ring shunt branch pipe, an inner ring shunt branch pipe, an outer side fuel ring cavity, an inner side fuel ring cavity and a fuel connecting rod; the outer fuel ring cavity, the fuel connecting rod and the inner fuel ring cavity are all provided with holes for jetting fuel gas; the peripheral combustion-supporting air inlet structure comprises: the inner cylinder structure, the outer cylinder structure, the formed combustion-supporting gas channel and the formed swirl blades, and a plurality of flow guide holes are formed in the surface of the inner cylinder structure. The utility model has the advantages of it is following: the fuel connecting rod can effectively balance the pressure of the two fuel annular cavities and efficiently organize combustion; the multilayer fuel gas channel and the combustion air channel can ensure the reliability of combustion and the reduction of pollutant emission.
Description
Technical Field
The utility model relates to a combustor technical field, concretely relates to environment-friendly is from inhaling formula oil field heating furnace burner structure.
Background
NOx and CO are important atmospheric pollutants and are important factors for causing acid rain and haze. With the increasing environmental requirements, the limits on the amount of NOx and CO emissions are becoming more stringent. In recent years, a clean gas burner using a gas such as natural gas as a fuel has been actively developed. The gas burner has the advantages of safety, high efficiency, simple and convenient operation and the like. However, there is still much room for improvement of pollutant emissions of gas burners used in oil field heating furnaces, and various technical means for reducing pollutant emissions are being sought. The design of an environment-friendly self-suction type oil field heating furnace burner is particularly important for improving the service efficiency of an oil field heating furnace, reducing the smoke exhaust temperature of an outlet of the heating furnace and reducing pollutant discharge.
The gas burner achieves the purpose of releasing heat by mixing fuel gas and combustion air and organizing combustion, and aiming at the oil field heating furnace burner, the pressure of the often used fuel can fluctuate along with the production process, so the design of the heating furnace burner needs to fully consider multiple factors such as fuel adaptability, fuel pressure fluctuation and combustion efficiency and pollutant emission reduction.
By reasonably designing the structure of the burner, the hole-type fuel outlets insensitive to fuel pressure fluctuation are used as far as possible, so that the generation of a local high-temperature area is reduced as far as possible on the basis of ensuring the reliable and efficient combustion, and the fuel gas and the combustion air are uniformly mixed, thereby inhibiting the generation of NOx and CO in the combustion process and reducing the discharge of the NOx and CO.
For example, chinese patent No. CN201410446283 introduces fuel by arranging a fuel injection rod at the upstream, the fuel is injected from radial holes at both sides of the fuel injection rod, and mixes the fuel by adopting a structure of cutting blades, and forms an accelerated airflow near a central cone, thereby avoiding the influence of a boundary layer, adjusting the distribution of fuel and air in a combustion area, reducing the formation of a high temperature area, and reducing the discharge amount of NOx and CO.
For another example, chinese patent No. CN201620971329 adopts a multi-layer air swirl manner to divide air into three parts, namely an outer layer, an intermediate layer and an inner layer, wherein the intermediate layer and the inner layer adopt a swirl design, the outer layer adopts a direct jet manner, fuel is arranged in a two-stage manner, the inner layer fuel is sprayed out through radial jet holes and mixed with the inner layer swirl air, the intermediate layer fuel is sprayed out through large holes uniformly distributed in the circumferential direction and mixed with the intermediate layer swirl air, and by adjusting fuel and air distribution in a combustion area, formation of local high temperature is avoided, and emission of NOx and CO is reduced.
However, the fuel gas sprayed by the fuel gun is premixed with combustion air before entering a combustion area, so that the structure of the burner is sensitive to the fluctuation of fuel pressure, and the burner is easy to cause backfire and deflagration when applied to occasions such as an oil field heating furnace and the like, thereby causing instability of the burner in the use process and increasing the generation amount of NOx and CO. Thus, there remains a need for a more rational and effective form of environmentally friendly self-priming oilfield furnace burner to efficiently organize combustion and control pollutant emissions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an environment-friendly is from inhaling formula oil field heating furnace burner structure for alleviate the undulant sensitivity of fuel gas pressure, the high-efficient burning of organizing, and help controlling the pollutant emission.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme.
An environment-friendly self-suction type oil field heating furnace burner structure comprises a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure; the central fuel gas channel structure includes: the fuel distributor comprises a central fuel gas channel, an outer ring shunt branch pipe, an inner ring shunt branch pipe, an outer side fuel ring cavity, an inner side fuel ring cavity and a fuel connecting rod, wherein the outer ring shunt branch pipe and the inner ring shunt branch pipe are connected to the central fuel gas channel; one end of the fuel connecting rod is connected to the outer side fuel ring cavity, and the other end of the fuel connecting rod is connected to the top end of the central fuel gas channel or connected to the inner side fuel ring cavity; the outer fuel ring cavity, the fuel connecting rod and the inner fuel ring cavity are all provided with holes for jetting fuel gas; the peripheral combustion-supporting air inlet structure comprises: the combustion-supporting gas channel structure comprises an inner cylinder structure surrounding the periphery of the central fuel gas channel structure, an outer cylinder structure surrounding the periphery of the inner cylinder structure, and swirl vanes arranged in the inner cylinder structure, wherein combustion-supporting gas channels are formed in the inner cylinder structure and between the inner cylinder structure and the outer cylinder structure respectively, and a plurality of flow guide holes are formed in the surface of the inner cylinder structure.
Optionally, the top end of the outer fuel ring cavity is provided with an outer fuel injection hole in a form of an oblique hole, the fuel connecting rod is provided with a radial fuel injection hole, and the top end of the inner fuel ring cavity is provided with an inner fuel injection hole in a form of an axial straight perforation.
Optionally, an outer combustion-supporting gas channel is formed between the inner cylinder structure and the outer cylinder structure, a middle combustion-supporting gas channel for providing combustion-supporting gas for the fuel gas injected by the fuel connecting rod and an inner combustion-supporting gas channel for providing combustion-supporting gas for the fuel gas injected by the inner fuel ring cavity are formed inside the inner cylinder structure, and the diversion hole is used for introducing a part of the combustion-supporting gas entering the outer combustion-supporting gas channel into the inner cylinder structure.
Optionally, the inner layer combustion-supporting gas channel and the middle layer combustion-supporting gas channel are provided with swirl vanes in opposite swirl directions.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
1. the fuel connecting rod can effectively balance the pressures of the two fuel annular cavities, so that the pressures of the fuel annular cavities are always kept in higher consistency, and the original combustion-supporting gas flow distribution can be well adapted under the condition of fuel pressure fluctuation, and the combustion is efficiently organized;
2. the design of the three layers of fuel channels and the three layers of combustion-supporting air channels can provide wider design space for the nozzle, meet the mixing requirement of different fuel gases and combustion-supporting air, improve the velocity distribution of mixed gas at the outlet of the nozzle, and ensure the combustion reliability and the reduction of pollutant emission;
3. the generation of NOx and CO can be further effectively inhibited by utilizing the high mixing type characteristic of the reverse rotational flow.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.
Fig. 1 is a front view of an environment-friendly self-priming oil field heating furnace burner structure according to an embodiment of the present invention;
fig. 2 is a perspective view of an environment-friendly self-priming oil field heating furnace burner structure according to an embodiment of the present invention;
fig. 3 is a sectional view of an environment-friendly self-priming oil field heating furnace burner structure according to an embodiment of the present invention;
fig. 4 is an internal structural view of an environment-friendly self-suction type oil field heating furnace burner structure according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The following are detailed descriptions of the respective embodiments.
Referring to fig. 1 to 4, an embodiment of the present invention provides an environment-friendly self-priming oil field heating furnace burner structure, which includes a central fuel gas channel structure 1 and a peripheral combustion-supporting gas channel structure 2.
The central fuel gas channel structure 1 comprises: a central fuel gas channel 11, an outer ring branch pipe 12 and an inner ring branch pipe 13 connected to the central fuel gas channel 11, an outer fuel ring cavity 14 connected to the outer ring branch pipe 12, an inner fuel ring cavity 15 connected to the inner ring branch pipe 13, and a fuel connecting rod 16; one end of the fuel connecting rod 16 is connected to the outer fuel ring cavity 14, and the other end is connected to the top end of the central fuel gas channel 11 or connected to the inner fuel ring cavity 15; the outer fuel ring cavity 14, the fuel connecting rod 16 and the inner fuel ring cavity 15 are all provided with holes for injecting fuel gas;
the peripheral combustion-supporting gas intake structure 2 includes: the fuel gas purifier comprises an inner cylinder structure 21 surrounding the periphery of the central fuel gas channel structure, an outer cylinder structure 22 surrounding the periphery of the inner cylinder structure 21, and swirl vanes 23 arranged in the inner cylinder structure 21, wherein combustion-supporting gas channels are respectively formed inside the inner cylinder structure 21 and between the inner cylinder structure 21 and the outer cylinder structure 22, and a plurality of flow guide holes 24 are formed in the surface of the inner cylinder structure 21.
Further, the peripheral combustion-supporting gas inlet structure 2 further includes: a combustion-supporting gas flow-limiting baffle for distributing combustion-supporting gas. Optionally, the combustion-supporting gas flow-limiting baffle plate includes a first annular baffle plate 25 disposed at the bottom end of the inner cylinder structure 21 and a second annular baffle plate 26 disposed at the bottom end of the outer cylinder structure 22.
Optionally, the top end of the outer fuel ring cavity 14 is provided with an outer fuel injection hole 17 in the form of a chamfered hole, the fuel connecting rod 16 is provided with a radial fuel injection hole 18, and the top end of the inner fuel ring cavity 15 is provided with an inner fuel injection hole 19 in the form of an axial straight hole.
Optionally, an outer combustion-supporting gas passage is formed between the inner cylinder structure 21 and the outer cylinder structure 22, a middle combustion-supporting gas passage for providing combustion-supporting gas for the fuel gas injected from the fuel connecting rod 16 and an inner combustion-supporting gas passage for providing combustion-supporting gas for the fuel gas injected from the inner fuel ring cavity 15 are formed inside the inner cylinder structure 21, and the flow guide hole 24 is used for introducing a part of the combustion-supporting gas entering the outer combustion-supporting gas passage into the inner cylinder structure.
Optionally, the inner layer combustion-supporting gas passage and the middle layer combustion-supporting gas passage are respectively provided with a swirl vane 23, and the swirl directions of the swirl vanes of the two parts are opposite.
Optionally, the number of the swirl vanes is 6-12.
Optionally, the swirl angle of the swirl vanes is 25-60 °.
Optionally, the aperture of the outer fuel injection hole is 2-4 mm, the number of the outer fuel injection holes is 20-40, and the angle of the oblique cutting hole is 15-45 degrees.
Optionally, the diameter of the middle layer fuel connecting rod is 4-12 mm, and the number of the middle layer fuel connecting rods is 4-8.
Optionally, the aperture of the axial direct-current jet hole on the inner side is 5-10 mm, and the number of the axial direct-current jet holes is 8-12.
As above, the utility model provides an environment-friendly is from inhaling formula oil field heating furnace burner structure, including central fuel gas access structure and peripheral combustion air access structure, fuel gas access and combustion-supporting gas access all adopt the design of layering for example three-layer.
The fuel gas enters through the central fuel gas channel 11 and is divided into an inner ring and an outer ring through a branch pipe, and the outer side fuel ring cavity 14 and the inner side fuel ring cavity 15 are connected through a fuel connecting rod 16. Fuel injection holes are formed in the outer fuel ring 14, the inner fuel ring 15 and the fuel connecting rod 16, so that fuel can be uniformly distributed in the whole combustor space. The outer fuel injection holes on the end surface of the outer fuel ring cavity 14 are in a chamfer hole type, the inner fuel injection holes are in axial straight holes, and radial fuel injection holes are formed in the two sides of the fuel connecting rod. The presence of the fuel tie rod 16, which integrates the outer fuel annulus 14 with the inner fuel annulus 15, effectively reduces the sensitivity to fuel pressure fluctuations that cause changes in fuel flow rate to be shared by all fuel injection orifices. The fuel injection is uniformly distributed, so that the fuel gas and the combustion-supporting gas can be more effectively mixed, and the generation of NOx and CO with lower content is ensured.
The combustion-supporting gas such as air can enter the combustor in a self-suction mode and is divided into an outer layer, a middle layer and an inner layer. Wherein, the combustion-supporting gas flow-limiting baffle plate determines the distribution proportion of the combustion-supporting gas of the inner layer, the middle layer and the outer layer. Part of the combustion-supporting gas entering the outer-layer combustion-supporting air channel enters the inner layer of the combustor through the annularly-distributed diversion holes 24 and is mixed with fuel gas sprayed from the outer-side fuel annular cavity to form a peripheral combustion area; the other part keeps the axial speed direction to enter the combustion area, and the maximum outer diameter of the flame of the combustor can be effectively controlled. The combustion-supporting gas entering the middle-layer combustion-supporting gas channel and the inner-layer combustion-supporting gas channel respectively flows through two swirl blade areas with opposite swirl directions to form reverse shearing swirl, and is mixed with fuel gas jetted by the fuel connecting rod and the inner-side fuel ring cavity, and a larger flame stabilization area is formed by means of the shearing action of the reverse swirl.
The fuel connecting rod can effectively balance the pressure of the two fuel annular cavities, so that the pressure of the annular cavities always keeps higher consistency, and the original combustion-supporting airflow distribution can be well adapted under the condition of fuel pressure fluctuation. The design of three-layer fuel channel and three-layer combustion air channel can provide wider design space for the nozzle, satisfies the needs of different fuel gas and combustion air mixing, improves the gas mixture velocity distribution of nozzle exit.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
1. the fuel connecting rod can effectively balance the pressures of the two fuel annular cavities, so that the pressures of the fuel annular cavities are always kept in higher consistency, and the original combustion-supporting gas flow distribution can be well adapted under the condition of fuel pressure fluctuation, and the combustion is efficiently organized;
2. the design of the three layers of fuel channels and the three layers of combustion-supporting air channels can provide wider design space for the nozzle, meet the mixing requirement of different fuel gases and combustion-supporting air, improve the velocity distribution of mixed gas at the outlet of the nozzle, and ensure the combustion reliability and the reduction of pollutant emission;
3. the generation of NOx and CO can be further effectively inhibited by utilizing the high mixing type characteristic of the reverse rotational flow.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. An environment-friendly self-suction type oil field heating furnace burner structure is characterized in that,
comprises a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure;
the central fuel gas channel structure includes: the fuel distributor comprises a central fuel gas channel, an outer ring shunt branch pipe, an inner ring shunt branch pipe, an outer side fuel ring cavity, an inner side fuel ring cavity and a fuel connecting rod, wherein the outer ring shunt branch pipe and the inner ring shunt branch pipe are connected to the central fuel gas channel; one end of the fuel connecting rod is connected to the outer side fuel ring cavity, and the other end of the fuel connecting rod is connected to the top end of the central fuel gas channel or connected to the inner side fuel ring cavity; the outer fuel ring cavity, the fuel connecting rod and the inner fuel ring cavity are all provided with holes for jetting fuel gas;
the peripheral combustion-supporting air inlet structure comprises: the combustion-supporting gas channel structure comprises an inner cylinder structure surrounding the periphery of the central fuel gas channel structure, an outer cylinder structure surrounding the periphery of the inner cylinder structure, and swirl vanes arranged in the inner cylinder structure, wherein combustion-supporting gas channels are formed in the inner cylinder structure and between the inner cylinder structure and the outer cylinder structure respectively, and a plurality of flow guide holes are formed in the surface of the inner cylinder structure.
2. The environment-friendly self-priming oilfield heating furnace burner structure as defined in claim 1, wherein the top end of the outer fuel ring cavity is provided with outer fuel injection holes in the form of chamfered holes, the fuel connecting rod is provided with radial fuel injection holes, and the top end of the inner fuel ring cavity is provided with inner fuel injection holes in the form of axial straight holes.
3. The environment-friendly self-priming oilfield heating furnace burner structure as defined in claim 1, wherein an outer combustion-supporting gas passage is formed between the inner barrel structure and the outer barrel structure, an intermediate combustion-supporting gas passage for providing combustion-supporting gas for the fuel gas injected from the fuel connecting rod and an inner combustion-supporting gas passage for providing combustion-supporting gas for the fuel gas injected from the inner fuel ring cavity are formed inside the inner barrel structure, and the diversion holes are used for introducing a part of the combustion-supporting gas entering the outer combustion-supporting gas passage into the inner barrel structure.
4. The environment-friendly self-priming oilfield heating furnace burner structure as defined in claim 3, wherein the inner combustion-supporting gas passage and the middle combustion-supporting gas passage have swirl vanes in opposite directions.
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| CN202020278567.6U CN211739079U (en) | 2020-03-09 | 2020-03-09 | Environment-friendly is from inhaling formula oil field heating furnace burner structure |
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| CN202020278567.6U CN211739079U (en) | 2020-03-09 | 2020-03-09 | Environment-friendly is from inhaling formula oil field heating furnace burner structure |
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