Burner with composite multi-layer flame

Abstract

The present invention discloses a burner with a composite multi-layer flame, comprising a shell, a gas delivery mechanism and an air delivery mechanism, wherein a combustion chamber with an opening on one side is arranged on the shell, a central cylinder is arranged at the center of the combustion chamber, and the combustion chamber is divided into a central chamber and an annular chamber surrounding the central chamber by the central cylinder; the air delivery mechanism delivers air to the central chamber, an igniter is arranged in the central cylinder, a pressure control plate is arranged at the opening of the central cylinder, a plurality of through holes are arranged on the pressure control plate, and an annular gap is provided between the edge of the pressure control plate and the inner wall of the central cylinder; the gas delivery mechanism is provided with a plurality of air outlets in the annular chamber, and the direction of the air outlets is arranged along the circumferential direction of the annulus. In the burner with a composite multi-layer flame provided by the present invention, the through hole area, the annular gap and the annular chamber successively form medium pressure, high pressure and low pressure atmospheres, so that the combustion is more complete.

Description

Technical Field

[0001] The invention relates to oil and gas technology, and in particular to a burner with a composite multi-layer flame. Background Art

[0002] During the oil and gas production process, various excess gases must be burned through burners. Most burners in the prior art include an ignition system, a gas injection system, and an air supply system. In order to fully burn a large amount of gas, a high-speed air supply system is generally used to supply a large amount of oxygen, so as to achieve sufficient combustion.

[0003] For example, the utility model patent with authorization announcement number 201093491Y and name "Oil and Gas Burner" provides high-speed airflow through a fan. The oil and gas inlet pipe extends into one end of the burner through a regulating valve, a fan casing and blades. A burner is installed on the outside of the oil and gas nozzle, and a combustion hole is provided on its outer wall. One end of the burner is a flame outlet, and an annular hot air flow mixing channel is formed between the burner and the burner casing. An igniter is installed in the oil and gas inlet pipe, thereby achieving the combustion of a large amount of gas.

[0004] The shortcoming of the existing technology is that the amount of gas required to be burned during oil and gas field exploitation is extremely large and unstable, and a single high-speed jet of airflow is often not sufficient, resulting in incomplete combustion of the gas. Summary of the invention

[0005] The object of the present invention is to provide a burner with a composite multi-layer flame to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A burner with a composite multi-layer flame, comprising a shell, a gas delivery mechanism and an air delivery mechanism, wherein the shell is provided with a combustion chamber with an opening on one side, a central cylinder is provided at the center of the combustion chamber, and the combustion chamber is divided into a central chamber and an annular chamber surrounding the central chamber by the central cylinder;

[0008] The air delivery mechanism delivers air to the central cavity, an igniter is arranged in the central cylinder, a pressure control plate is arranged at the opening of the central cylinder, a plurality of through holes are arranged on the pressure control plate, and an annular gap is provided between the edge of the pressure control plate and the inner wall of the central cylinder;

[0009] The gas delivery mechanism is provided with a plurality of gas outlets in the annular cavity, and the directions of the gas outlets are arranged along the circumferential direction of the annulus.

[0010] In the burner described above, a cylindrical portion is provided at one end of the shell, the inner side of the cylindrical portion is the combustion chamber, a fuel gas chamber is provided in the wall plate of the cylindrical portion, and the fuel gas delivery mechanism delivers fuel gas to the fuel gas chamber.

[0011] In the above-mentioned burner, the gas delivery mechanism includes a plurality of gas delivery pipes, and the plurality of gas delivery pipes are evenly arranged on the outer wall of the cylindrical portion.

[0012] The above-mentioned burner also includes a negative pressure chamber, which is connected to the annular chamber. The air delivery mechanism delivers air to the central chamber through the negative pressure chamber. When the air passes through the negative pressure chamber, it drives the gas in the annular chamber into the central chamber.

[0013] In the above-mentioned burner, the negative pressure chamber is configured to be able to adjust the chamber size.

[0014] In the above-mentioned burner, the shell is further provided with a gas injection port, and the injection direction of the gas injection port is in contact with the axial outer side of the combustion chamber.

[0015] The burner mentioned above has a plurality of gas injection ports, and the plurality of gas injection ports are arranged around the combustion chamber.

[0016] In the above-mentioned burner, two groups of gas outlets are arranged in the combustion chamber, and the two groups of gas outlets are located at different positions in the axial direction of the combustion chamber.

[0017] In the above-mentioned burner, the two groups of gas outlets are arranged alternately in the circumferential direction of the gas chamber.

[0018] In the above-mentioned burner, the gas delivery mechanism includes the gas outlet pipe, and the two ends of the gas outlet pipe are respectively connected to the inner wall of the combustion chamber and the outer wall of the central tube;

[0019] The air outlet is arranged at the middle part of the air outlet pipe.

[0020] In the above technical scheme, the burner with a composite multi-layer flame provided by the present invention forms medium-pressure, high-pressure and low-pressure atmospheres in the through-hole area, the annular gap and the annular cavity respectively, thus forming an annular high-pressure flame zone, and low-pressure flame zones are formed on both sides of the high-pressure flame zone, and the circumferential air outlet is used to prevent flameout, thereby greatly increasing the combustion area, improving the gas combustion amount, and making the combustion more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A front view of a burner provided by an embodiment of the present invention;

[0023] Figure 2 A side view of a burner provided by an embodiment of the present invention;

[0024] Figure 3 A cross-sectional view of a combustion chamber provided in accordance with an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Shell; 2. Gas delivery mechanism; 3. Air delivery mechanism; 4. Combustion chamber; 5. Central cylinder; 6. Central chamber; 7. Annular chamber; 8. Pressure control plate; 9. Through hole; 10. Annular gap; 11. Exhaust pipe; 12. Gas chamber; 13. Gas injection port. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-3 As shown, a burner with a composite multi-layer flame provided in an embodiment of the present invention comprises a shell 1, a gas delivery mechanism 2 and an air delivery mechanism 3, the shell 1 is provided with a combustion chamber 4 with an opening on one side, a central cylinder 5 is provided at the center of the combustion chamber 4, the combustion chamber 4 is divided by the central cylinder 5 into a central chamber 6 and an annular chamber 7 surrounding the central chamber 6; the air delivery mechanism 3 delivers air to the central chamber 6, an igniter is provided in the central cylinder 5, a pressure control plate 8 is provided at the opening of the central cylinder 5, a plurality of through holes 9 are provided on the pressure control plate 8, an annular gap 10 is provided between the edge of the pressure control plate 8 and the inner wall of the central cylinder 5; the gas delivery mechanism 2 is provided with a plurality of air outlets in the annular chamber 7, and the directions of the air outlets are arranged along the circumferential direction of the ring.

[0029] Specifically, the shell 1 is the outer shell and internal skeleton structure of the burner, and the gas delivery mechanism 2 and the air delivery mechanism 3 are directly or indirectly connected to the shell 1, wherein the gas delivery mechanism 2 is used to deliver the gas for combustion, and the air delivery mechanism 3 is used to deliver air at high speed, and the gas and air are mixed in the combustion chamber 4 in the shell 1, and the combustion chamber 4 is a semi-enclosed cavity with an opening on one side thereof, and a central cylinder 5 is arranged in the combustion chamber 4, and the central cylinder 5 is located at the central position in the combustion chamber 4, and the central axis of the central cylinder 5 coincides or substantially coincides with the central axis of the combustion chamber 4, and the central cylinder 5 divides the space inside the combustion chamber 4 into There are two: a central cavity 6 inside the central cylinder 5, and an annular cavity 7 between the central cylinder 5 and the inner wall of the combustion chamber 4, wherein the air delivery mechanism 3 is connected to the central cylinder 5, that is, air is delivered to the central cylinder 5, and the gas delivery mechanism 2 is connected to the annular cavity 7, that is, gas is delivered to the annular cavity 7. In this embodiment, the opening direction of the central cavity 6 is consistent with the opening direction of the combustion chamber 4, wherein a pressure control plate 8 is also provided on the opening of the central cavity 6, and the area of ​​the pressure control plate 8 is approximately smaller than the area of ​​the opening, that is, there is an annular gap 10 between the edge of the pressure control plate 8 and the inner wall of the central cavity 6, and a plurality of through holes 9 are also provided on the pressure control plate 8.

[0030] In order to achieve full combustion, the burner provided in this embodiment has an air delivery speed much greater than the gas delivery speed, and the air is input from the central cavity 6, so that the airflow output speed of the opening of the central cavity 6 is greater than the gas output speed in the annular cavity 7. At the same time, since the central cavity 6 is partially covered by the pressure control plate 8, the central cavity 6 has the fastest speed at the annular gap 10, and the speed in the pressure control plate 8 area is slightly slower, but both are greater than the speed of the annular cavity 7. That is, for the opening of the burner, from the outside to the inside, a low-speed, high-speed, and medium-speed airflow pattern is formed in sequence, and the corresponding air pressure environment is also a low-pressure, high-pressure, and medium-pressure environment, where the high-pressure and medium-pressure are air, and the low-pressure is gas. In this way, the pressure level arrangement is set, and the composite layout of air inside and gas outside forms at least three layers of flames with different flow rates during combustion.

[0031] In this embodiment, the gas delivery mechanism 2 is provided with a plurality of gas outlets in the annular cavity 7 to evenly deliver the gas, and the gas outlets are arranged along the circumferential direction of the ring, that is, an annular surrounding flame is formed in the annular cavity 7, which can reduce the probability of flameout.

[0032] The burner with a composite multi-layer flame provided by the embodiment of the present invention forms medium-pressure, high-pressure and low-pressure atmospheres in the through-hole 9 area, the annular gap 10 and the annular cavity 7 in turn, thus forming an annular high-pressure flame zone, and low-pressure flame zones on both sides of the high-pressure flame zone, and prevents flameout through the circumferential air outlet, thereby greatly increasing the combustion area, improving the gas combustion amount, and making the combustion more complete.

[0033] In another embodiment provided by the present invention, preferably, a cylindrical portion is provided at one end of the shell 1, the inner side of the cylindrical portion is the combustion chamber 4, a gas chamber 12 is provided in the wall panel of the cylindrical portion, that is, the gas chamber 12 surrounds the combustion chamber 4, and the gas delivery mechanism 2 delivers gas to the gas chamber 12. Such a setting has two functions. First, the flowing gas can cool the shell 1 and alleviate the negative effects of the shell 1 being subjected to high-temperature burning for a long time. Second, it preheats the gas before it burns to improve the combustion efficiency.

[0034] More preferably, the gas delivery mechanism 2 includes a plurality of gas delivery pipes, which are evenly arranged on the outer wall of the cylindrical portion. Correspondingly, a gas homogenization device is provided in the gas chamber 12 for evenly delivering the gas through a plurality of gas outlets.

[0035] The present invention provides another embodiment, further comprising a negative pressure chamber, which is connected to the annular chamber 7, and the air conveying mechanism 3 conveys air to the central chamber 6 through the negative pressure chamber. For example, the air conveying mechanism 3 includes a conveying channel, and the end of the conveying channel has a constriction structure, and the constriction structure can accelerate the airflow, so that a negative pressure chamber is formed around the high-speed airflow on the back side of the constriction mechanism, that is, the high-speed airflow forms a negative pressure in the negative pressure chamber, and the negative pressure chamber is connected to the other side of the annular chamber 7. When the air passes through the negative pressure chamber, it drives the gas in the annular chamber 7 to enter the central chamber 6, that is, the high-speed airflow wraps around part of the gas and enters the central chamber 6, so that part of the gas is mixed with the air in advance, which facilitates more efficient combustion.

[0036] Furthermore, if Figure 2 As shown, the negative pressure chamber is configured to be able to adjust the size of the cavity, such as the cavity shell of the negative pressure chamber is movably connected to the shell 1, such as it is sleeved on the end of the shell 1, it slides along the shell 1 to change the size of the portion overlapping with the shell 1, that is, the size of the negative pressure chamber inside it is adjusted. Obviously, the less the portion of the cavity shell of the negative pressure chamber that overlaps with the shell 1, the larger the space inside it, that is, the larger the negative pressure chamber, and the larger the negative pressure chamber is, the more gas can be sucked in.

[0037] In another embodiment provided by the present invention, further, a gas injection port 13 is further provided on the housing 1, and the injection direction of the gas injection port 13 is in contact with the axial outer side of the combustion chamber 4, and at this time, a layer of flame is formed on the outer side of the annular chamber 7, further improving the combustion effect. Preferably, there are multiple gas injection ports 13, and the multiple gas injection ports 13 are arranged around the combustion chamber 4, so that the gas injection ports 13 are evenly arranged.

[0038] The present invention provides another embodiment, further, two groups of the gas outlets are provided in the combustion chamber 12, and the two groups of the gas outlets are located at different positions in the axial direction of the combustion chamber 4, that is, one group of the gas outlets is in front, and the other group of the gas outlets is in the back, so that two layers of annular flames are formed in the annular chamber 7, and the two groups influence each other to improve the combustion efficiency, and the latter group can prevent flameout. Preferably, the two groups of the gas outlets are staggered in the circumferential direction of the combustion chamber 12, so that a more balanced gas distribution is achieved.

[0039] Furthermore, the gas delivery mechanism 2 includes the gas outlet pipe 11, and the two ends of the gas outlet pipe 11 are respectively connected to the inner wall of the combustion chamber 4 and the outer wall of the center tube. The combustion chamber 4 and the center tube are strengthened by the gas outlet pipe 11. At the same time, the gas outlet is arranged in the middle of the gas outlet pipe 11, so that the gas outlet can be arranged in the middle of the annular cavity 7, and the gas outlet is more balanced.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A burner with a composite multi-layer flame, comprising a shell, a gas delivery mechanism and an air delivery mechanism, wherein the shell is provided with a combustion chamber with one side open, It is characterized in that A central cylinder is arranged at the center of the combustion chamber, and the combustion chamber is divided into a central chamber and an annular chamber surrounding the central chamber by the central cylinder; The air delivery mechanism delivers air to the central cavity, an igniter is arranged in the central cylinder, a pressure control plate is arranged at the opening of the central cylinder, a plurality of through holes are arranged on the pressure control plate, and an annular gap is provided between the edge of the pressure control plate and the inner wall of the central cylinder; The gas delivery mechanism is provided with a plurality of gas outlets in the annular cavity, and the directions of the gas outlets are arranged along the circumferential direction of the annulus; It also includes a negative pressure chamber, which is connected to the annular chamber, and the air conveying mechanism conveys air to the central chamber through the negative pressure chamber. When the air passes through the negative pressure chamber, it drives the gas in the annular chamber to enter the central chamber. The negative pressure chamber is configured to be able to adjust the cavity size. The cavity shell of the negative pressure chamber is movably connected to the shell. The cavity shell of the negative pressure chamber slides along the shell to change the size of the overlapping part of the cavity shell and the shell, thereby adjusting the size of the negative pressure chamber.

2. The burner according to claim 1, It is characterized in that A cylindrical portion is provided at one end of the shell, the inner side of the cylindrical portion is the combustion chamber, a fuel gas chamber is provided inside the wall plate of the cylindrical portion, and the fuel gas delivery mechanism delivers fuel gas to the fuel gas chamber.

3. The burner according to claim 2, It is characterized in that The gas delivery mechanism comprises a plurality of gas delivery pipes, and the plurality of gas delivery pipes are evenly arranged on the outer wall of the cylindrical portion.

4. The burner according to any one of claims 1 to 3, It is characterized in that The shell is also provided with a gas injection port, and the injection direction of the gas injection port is in contact with the axial outer side of the combustion chamber.

5. The burner according to claim 4, It is characterized in that There are a plurality of gas injection ports, and the plurality of gas injection ports are arranged around the combustion chamber.

6. The burner according to claim 4, It is characterized in that Two groups of gas outlets are arranged in the combustion chamber, and the two groups of gas outlets are located at different positions in the axial direction of the combustion chamber.

7. The burner according to claim 4, It is characterized in that The two groups of gas outlets are arranged alternately in the circumferential direction of the gas chamber.

8. The burner according to claim 7, It is characterized in that The gas delivery mechanism comprises an air outlet pipe, two ends of which are respectively connected to the inner wall of the combustion chamber and the outer wall of the central tube; the air outlet is arranged in the middle of the air outlet pipe.

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