CN211739070U - Low-pollution burner structure for oil field heating furnace - Google Patents
Low-pollution burner structure for oil field heating furnace Download PDFInfo
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- CN211739070U CN211739070U CN202020277487.9U CN202020277487U CN211739070U CN 211739070 U CN211739070 U CN 211739070U CN 202020277487 U CN202020277487 U CN 202020277487U CN 211739070 U CN211739070 U CN 211739070U
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Abstract
The utility model discloses a low-pollution burner structure for an oil field heating furnace, which comprises a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure; the central fuel gas channel structure includes: the central fuel gas channel, the outer ring shunt branch pipe and the inner ring shunt branch pipe which are connected with the central fuel gas channel are additionally connected with the outer side and the inner side fuel ring cavity of the outer ring and the inner ring shunt branch pipe, the top end of the outer side fuel ring cavity is provided with an outer side fuel injection hole, and the top end of the inner side fuel ring cavity is provided with an inner side fuel injection rod; the peripheral combustion-supporting air inlet structure comprises: an inner combustion-supporting gas channel is formed by enclosing the inner cylinder structure, and an outer combustion-supporting gas channel is enclosed between the outer cylinder structure and the inner cylinder structure. The structure of the utility model carries out inner and outer grading on fuel and combustion-supporting gas, thereby ensuring the efficiency and reliability of combustion and being beneficial to reducing pollutant emission; the inner side fuel ring cavity and the outer side fuel ring cavity are both in an injection mode, so that the sensitivity to fuel pressure fluctuation is effectively reduced, and efficient combustion is realized.
Description
Technical Field
The utility model relates to a combustor technical field, concretely relates to low pollution combustor structure for oil field heating furnace.
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 a low-pollution burner structure for an oil field heating furnace is particularly important for improving the service efficiency of the oil field heating furnace, reducing the smoke exhaust temperature of an outlet of the heating furnace and reducing pollutant emission.
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, in chinese patent No. CN201410843051, fuel is supplied by making holes on both sides of a fuel injection rod, and fuel is mixed by using a multi-layer stepped and conical diversion structure inside a nozzle, so as to adjust the distribution of fuel and air in a combustion region, reduce the formation of a high temperature region, and reduce the emission of NOx and CO.
For another example, in chinese patent No. CN201620962120, the fuel is divided into two parts by a fuel classification method, one part is radially ejected through the jet hole, the other part is partially premixed before being ejected through the swirl vane, and by adjusting the fuel and air distribution inside and outside the combustion area, the formation of local high temperature is avoided, and the 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 low pollution burner configuration for oil field heating furnaces to efficiently organize combustion and control pollutant emissions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low pollution burner structure for oil field heating furnace for high efficiency organizes burning and control pollutant emission.
In order to achieve the purpose, the utility model adopts the following technical scheme.
A low pollution burner structure for oil field heating furnace comprises a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure; the central fuel gas channel structure includes: the fuel injection device comprises a central fuel gas channel, an outer ring shunt branch pipe, an inner ring shunt branch pipe, an outer side fuel ring cavity and an inner side fuel ring cavity, wherein the outer ring shunt branch pipe and the inner ring shunt branch pipe are connected to the central fuel gas channel; the peripheral combustion-supporting air inlet structure comprises: the inner cylinder structure surrounds the periphery of the central fuel gas channel structure, the outer cylinder structure surrounds the periphery of the inner cylinder structure, the inner cylinder structure surrounds to form an inner-layer combustion-supporting gas channel, and an outer-layer combustion-supporting gas channel is formed between the outer cylinder structure and the inner cylinder structure.
Furthermore, the top end of the inner side fuel injection rod is connected with a smoke ejector.
Further, the peripheral combustion-supporting air inlet structure further includes: the combustion-supporting gas flow-limiting baffle is used for distributing the proportion of the combustion-supporting gas entering the outer-layer combustion-supporting gas channel and the inner-layer combustion-supporting gas channel.
Furthermore, the combustion-supporting gas flow-limiting baffle comprises a first annular baffle arranged at the bottom end of the inner cylinder structure and a second annular baffle arranged at the bottom end of the outer cylinder structure.
Furthermore, the top end of the cylinder wall of the inner cylinder structure is provided with a flow guide hole for communicating the peripheral combustion-supporting gas channel and the inner layer combustion-supporting gas channel.
Further, an inner layer swirl vane is arranged in the inner layer combustion-supporting gas channel.
Further, the outer side fuel injection holes and the inner side fuel injection rods are circumferentially and uniformly distributed and are arranged in a relative staggered mode.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
1. the fuel and the combustion-supporting gas are classified inside and outside, so that the combustion efficiency and reliability are ensured, and the pollutant emission is reduced;
2. the inner side fuel ring cavity and the outer side fuel ring cavity are both in an injection mode, particularly a straight hole type fuel injection mode can be adopted, so that the sensitivity to fuel pressure fluctuation is effectively reduced, and efficient combustion is realized;
3. furthermore, the smoke ejector is used for ejecting smoke to dilute fuel, so that the generation of NOx and CO can be further effectively inhibited.
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 a low pollution burner configuration according to an embodiment of the present invention;
fig. 2 is a perspective view of a low pollution burner structure according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a low pollution burner configuration according to an embodiment of the present invention;
fig. 4 is an internal structural view of a low pollution 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 "including" and "having," and any variations thereof, in the description and claims of this invention and the above-described drawings 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 will explain details by way of specific examples.
Referring to fig. 1 to 4, an embodiment of the present invention provides a low pollution burner structure for an oil field heating furnace, which includes a central fuel gas channel structure and a peripheral combustion-supporting gas channel structure.
The central fuel gas channel structure includes: the fuel injection device comprises a central fuel gas channel 11, an outer ring branch pipe 13 and an inner ring branch pipe 12 which are connected to the central fuel gas channel 11, an outer side fuel ring cavity 14 connected to the outer ring branch pipe 13, and an inner side fuel ring cavity 16 connected to the inner ring branch pipe 12, wherein an outer side fuel injection hole 15 is formed in the top end of the outer side fuel ring cavity 4, an inner side fuel injection rod 17 is arranged on the top end of the inner side fuel ring cavity 16, and the inner side fuel injection rod 17 is optional and connected with a smoke ejector 18 in the top end.
Further, the outer fuel injection holes 15 and the inner fuel injection rods 17 are uniformly distributed in the circumferential direction and are arranged in a staggered manner.
The peripheral combustion-supporting air inlet structure comprises: the fuel gas combustion-supporting structure comprises an inner cylinder structure 21 surrounding the periphery of the central fuel gas channel structure and an outer cylinder structure 22 surrounding the periphery of the inner cylinder structure 21, wherein the inner cylinder structure 21 is enclosed to form an inner combustion-supporting gas channel 23, and an outer combustion-supporting gas channel 24 is enclosed between the outer cylinder structure 22 and the inner cylinder structure 21.
Further, the peripheral combustion-supporting air inlet structure further includes: and the combustion-supporting gas flow limiting baffle is used for distributing the proportion of the combustion-supporting gas entering the outer-layer combustion-supporting gas channel 24 and the inner-layer combustion-supporting gas channel 23. 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 combustion-supporting gas is air, and can enter the inner-layer combustion-supporting gas channel 23 from the bottom of the inner cylinder structure 21, and enter the outer-layer combustion-supporting gas channel 24 from the bottom of the outer cylinder structure 22.
Further, a diversion hole 27 for communicating the peripheral combustion-supporting air passage 24 and the inner layer combustion-supporting air passage 23 is formed at the top end of the cylinder wall of the inner cylinder structure 21.
Further, an inner layer swirl vane 28 may be disposed in the inner layer combustion-supporting gas passage 23.
The central fuel gas channel structure as described above, the operation principle thereof includes: the fuel gas enters through a central fuel gas channel 11 and is divided into an inner ring and an outer ring through a branch pipe. A part of fuel gas enters an outer fuel ring cavity 14 through an outer ring branch pipe 13, one or more layers of outer fuel injection holes 15 which are uniformly distributed in the circumferential direction can be arranged at the top end of the outer fuel ring cavity 14, and the fuel gas enters a combustion area after flowing through the fuel injection holes; the other part of the fuel gas enters an inner side fuel annular cavity 16 through an inner ring shunt branch pipe 12, inner side fuel injection rods 17 which are uniformly distributed in the circumferential direction can be arranged at the top end of the inner side fuel annular cavity 16, a flue gas ejector 18 can be connected to an outlet of each inner side fuel injection rod 17, the fuel gas effectively sucks the flue gas in a hearth before entering a combustion area through the action of the flue gas ejector 18, and the formed mixed gas jointly enters the combustion area. Wherein, the inner side fuel ring cavity 16 and the outer side fuel ring cavity 14 can adopt a straight hole type fuel injection mode. The central fuel gas channel structure effectively reduces the sensitivity to fuel pressure fluctuation, and can effectively inhibit the generation of NOx and CO through the fuel dilution effect caused by fuel classification and injection smoke.
The peripheral combustion-supporting air inlet structure comprises the working principle that: combustion-supporting gas such as air enters the combustor from the bottom in a self-suction mode, and is divided into two parts by a peripheral combustion-supporting gas inlet structure, wherein one part enters an outer-layer combustion-supporting gas channel 24, and the other part enters an inner-layer combustion-supporting gas channel 23. The combustion-supporting gas flow-limiting baffle is used for determining the distribution ratio of the combustion-supporting gas of the inner layer and the combustion-supporting gas of the outer layer. The combustion-supporting gas entering the inner-layer combustion-supporting gas channel 23 enters the combustion area through the inner-layer swirl vanes and is mixed with the fuel gas jetted from the inner-side fuel annular cavity to form a stable central combustion area. Part of the combustion-supporting gas entering the outer-layer combustion-supporting gas channel 24 enters the inner layer of the combustor through the diversion holes 27 and is mixed with fuel gas jetted by the outer-side fuel annular cavity 14 to form a peripheral combustion area; another part enters the combustion zone axially through the burner's annular seam structure (the annular seam between the outer 22 and inner 21 barrel structures) for maintaining the maximum outer diameter of the burner flame.
The outer side fuel injection holes 15 of the outer side fuel ring cavity 14 and the inner side fuel injection rods 15 of the inner side fuel ring cavity 16 are uniformly distributed in the circumferential direction and are arranged in a staggered mode relatively, a wider design space can be provided for the nozzle, the mixing requirement of different fuel gases and combustion-supporting gases is met, and the velocity distribution of mixed gas at the outlet of the nozzle is improved.
Preferably, in the utility model, the number of the inner layer rotational flow blades 28 is 6-12; the rotational flow angle of the inner layer rotational flow blade is 25-60 degrees. The flame shape and the flame intensity can be controlled by reasonably selecting the numerical value of the swirl angle according to the size of the combustion chamber.
Preferably, in the utility model, the diameter of the outer fuel injection holes 15 is 2-4 mm, and the number is 20-40; the diameter of the inner side fuel injection rod 17 is 5-10 mm, and the number of the inner side fuel injection rods is 8-20; the distance between the inner side fuel injection rod 17 and the smoke ejector 18 is 15-60 mm. Therefore, reliable premixing of fuel gas and flue gas can be ensured, and flame return phenomenon caused by fuel pressure fluctuation is prevented.
In conclusion, the structure of the low-pollution burner for the oil field heating furnace of the present invention is described in detail. According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
1. the fuel gas and the combustion-supporting gas are classified inside and outside, so that the combustion efficiency and reliability are ensured, and the pollutant emission is reduced;
2. the inner side fuel ring cavity and the outer side fuel ring cavity are both in an injection mode, particularly a straight hole type fuel injection mode can be adopted, so that the sensitivity to fuel pressure fluctuation is effectively reduced, and efficient combustion is realized;
3. furthermore, the smoke ejector is used for ejecting smoke to dilute fuel, so that the generation of NOx and CO can be further effectively inhibited.
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 (6)
1. A low-pollution burner structure for an oil field heating furnace 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 injection device comprises a central fuel gas channel, an outer ring shunt branch pipe, an inner ring shunt branch pipe, an outer side fuel ring cavity and an inner side fuel ring cavity, wherein the outer ring shunt branch pipe and the inner ring shunt branch pipe are connected to the central fuel gas channel;
the peripheral combustion-supporting air inlet structure comprises: the inner cylinder structure surrounds the periphery of the central fuel gas channel structure, the outer cylinder structure surrounds the periphery of the inner cylinder structure, the inner cylinder structure surrounds to form an inner-layer combustion-supporting gas channel, and an outer-layer combustion-supporting gas channel is formed between the outer cylinder structure and the inner cylinder structure.
2. The structure of the low pollution burner for oil field heating furnace according to claim 1, wherein the top end of the inner fuel injection rod is connected with a smoke ejector.
3. The low pollution burner structure for oil field heating furnaces as claimed in claim 1, wherein said peripheral combustion-supporting gas intake structure further comprises: the combustion-supporting gas flow-limiting baffle is used for distributing the proportion of the combustion-supporting gas entering the outer-layer combustion-supporting gas channel and the inner-layer combustion-supporting gas channel.
4. The low pollution burner structure for oil field heating furnace according to claim 1, wherein the top end of the cylinder wall of the inner cylinder structure is provided with a diversion hole communicating the peripheral combustion-supporting gas passage and the inner combustion-supporting gas passage.
5. The structure of the low pollution burner for the oil field heating furnace according to claim 1, wherein an inner layer swirl vane is provided in the inner layer combustion-supporting gas passage.
6. The structure of a low-pollution burner for an oilfield heating furnace of claim 1, wherein the outer fuel injection holes and the inner fuel injection rods are uniformly circumferentially distributed and relatively staggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020277487.9U CN211739070U (en) | 2020-03-09 | 2020-03-09 | Low-pollution burner structure for oil field heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020277487.9U CN211739070U (en) | 2020-03-09 | 2020-03-09 | Low-pollution burner structure for oil field heating furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378250A (en) * | 2020-11-12 | 2021-02-19 | 吴石金 | Three-dimensional material guide assembly adopting granular heating |
| CN117739340A (en) * | 2023-12-23 | 2024-03-22 | 安徽华夏蓝天机电设备有限公司 | Multilayer three-dimensional combustor |
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2020
- 2020-03-09 CN CN202020277487.9U patent/CN211739070U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378250A (en) * | 2020-11-12 | 2021-02-19 | 吴石金 | Three-dimensional material guide assembly adopting granular heating |
| CN117739340A (en) * | 2023-12-23 | 2024-03-22 | 安徽华夏蓝天机电设备有限公司 | Multilayer three-dimensional combustor |
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