Layered burner

Abstract

The utility model relates to a layered burner which comprises a cooling air pipeline, an inner-layer air pipeline, a gas pipeline, an oxygen pipeline, an outer-layer air pipeline and an air inlet device which are sequentially arranged from inside to outside. A cooling air spraying opening is formed in the right end of the cooling air pipeline, an inner layer air spraying opening is formed in the right end of the inner layer air pipeline, a fuel gas spraying opening and an oxygen supply through hole are formed in the right end of the fuel gas pipeline, and the fuel gas pipeline communicates with a fuel gas inlet pipe. The oxygen supply through hole is formed in the side wall of the fuel gas pipeline and located at the right end of the fuel gas spraying opening, an oxygen spraying opening is formed in the right end of the oxygen pipeline, the oxygen pipeline is communicated with an oxygen inlet pipe, and an outer-layer air spraying opening is formed in the right end of the outer-layer air pipeline; the air inlet device is communicated with the cooling air pipeline, the inner-layer air pipeline and the outer-layer air pipeline at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a layered burner. Background Art

[0002] Burner is the abbreviation of the combustion device used in industrial fuel furnaces. Burners are usually used in industrial production to achieve the purpose of heating.

[0003] Traditional burners usually use pure oxygen gas combustion-supporting technology or oxygen-enriched gas combustion-supporting technology to give full play to the performance of the fuel. However, when pure oxygen or enriched oxygen is used for combustion, the high-temperature area of ​​the burner head will usually have a higher combustion temperature. Under high temperature conditions, it will easily cause oxidation and burning of the burner head, greatly reducing the service life of the burner. In order to solve the problems encountered by traditional burners, the general solution is to reduce the temperature of the high-temperature area of ​​the burner head and the outer shell through water cooling, but the water cooling method also has its limitations. For example, the welds of the water-cooling pipes are very likely to crack due to high temperature, which will lead to safety problems such as water leakage in the water-cooling pipes. In addition, the water-cooling pipes are complex and will also take away unnecessary heat loss. At the same time, due to the fast combustion speed of fuel and oxygen, the flame of the traditional burner is shorter and the combustion flue gas volume is smaller, which cannot meet the production process requirements in some application scenarios. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a layered burner, which can reduce the local high temperature of the burner, reduce the burning loss of the high temperature section of the burner, and improve the safety of the burner during the combustion process.

[0005] To achieve the above-mentioned purpose, the utility model provides a stratified burner, comprising a cooling air duct, an inner air duct, a gas duct, an oxygen duct, an outer air duct and an air intake device; the cooling air duct, the inner air duct, the gas duct, the oxygen duct and the outer air duct are coaxially arranged from the inside to the outside, and the diameters of the cooling air duct, the inner air duct, the gas duct, the oxygen duct and the outer air duct are increased in sequence; the right end of the cooling air duct is provided with a cooling air outlet, and the right end of the inner air duct is provided with an inner air outlet. outlet, a gas outlet and an oxygen supply through hole are arranged at the right end of the gas pipeline, and a gas inlet pipe is connected to the gas pipeline, the oxygen supply through hole is arranged on the side wall of the gas pipeline and is located at the right end of the gas outlet, and the oxygen supply through hole connects the gas pipeline and the oxygen pipeline, an oxygen outlet is arranged at the right end of the oxygen pipeline, and an oxygen inlet pipe is connected to the oxygen pipeline, and an outer air outlet is arranged at the right end of the outer air pipeline; the air intake device is connected to the cooling air pipeline, the inner air pipeline and the outer air pipeline at the same time.

[0006] Furthermore, the air intake device includes an air intake pipe, an air branch pipe and a connecting mechanism, the air intake pipe is connected to an outer air duct, one end of the air branch pipe is connected to the air intake pipe, and the other end is connected to an inner air duct, and the inner air duct is connected to a cooling air duct via a connecting mechanism.

[0007] Furthermore, an auxiliary device is included, and the auxiliary device is connected to the left end of the cooling air duct.

[0008] Furthermore, the auxiliary device comprises an ignition gun for igniting gas, and the ignition gun is located in the inner cavity of the cooling air duct.

[0009] Furthermore, the auxiliary device includes a flame detector for detecting the combustion condition of the flame.

[0010] Furthermore, the auxiliary device comprises an observation mirror for observing the burning flame of the burner.

[0011] Furthermore, the cooling air outlet, inner air outlet, gas outlet, oxygen outlet and outer air outlet can control their ejection cross-sections and ejection volumes according to different gas types and pressures.

[0012] Furthermore, the cooling air duct, the inner air duct, the gas duct, the oxygen duct, the outer air duct and the air intake device are all made of heat-resistant steel.

[0013] Furthermore, the inner layer air duct and the outer layer air duct are provided with swirl vanes for controlling the length of the burner combustion flame.

[0014] As described above, the layered burner involved in the utility model has the following beneficial effects:

[0015] By setting up cooling air ducts, inner air ducts, gas ducts, oxygen ducts and outer air ducts, the gas, air and oxygen are mixed and burned in layers, which can reduce the local high temperature of the burner, reduce the burning loss of the high temperature section of the burner, increase the service life, and improve the safety of the burner during the combustion process. By setting up an air intake device, on the one hand, it can transport air, and on the other hand, it can reduce the local temperature of the burner. Compared with the traditional water cooling method, it has higher safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the burner in the utility model.

[0017] Figure 2 It is a cross-sectional view of the burner in the utility model.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 It is a side view of the burner in the utility model.

[0020] Figure 5 It is a top view of the burner in the utility model.

[0021] Description of Figure Numbers

[0022] 1. Cooling air duct, 101. Cooling air outlet, 2. Inner air duct, 201. Inner air outlet, 3. Gas duct, 301. Gas outlet, 302. Oxygen supply through hole, 303. Gas inlet pipe, 4. Oxygen duct, 401. Oxygen outlet, 402. Oxygen inlet pipe, 5. Outer air duct, 501. Outer air outlet, 6. Air intake device, 601. Air intake pipe, 602. Air branch pipe, 603. Connecting mechanism, 7. Auxiliary device, 701. Ignition gun, 8. Swirl sheet. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0027] See also Figures 1 to 4 The utility model provides a layered burner, comprising a cooling air duct 1, an inner air duct 2, a gas duct 3, an oxygen duct 4, an outer air duct 5 and an air intake device 6; the cooling air duct 1, the inner air duct 2, the gas duct 3, the oxygen duct 4 and the outer air duct 5 are a coaxial sleeve structure arranged in sequence from the inside to the outside, and the diameters of the cooling air duct 1, the inner air duct 2, the gas duct 3, the oxygen duct 4 and the outer air duct 5 increase in sequence. Specifically, the diameter of the inner air duct 2 is larger than the diameter of the cooling air duct 1, the diameter of the gas duct 3 is larger than the diameter of the inner air duct 2, the diameter of the oxygen duct 4 is larger than the diameter of the gas duct 3, and the diameter of the outer air duct 5 is larger than the diameter of the oxygen duct 4. A cooling air jet port 101 is provided at the right end of the cooling air duct 1, an inner air jet port 201 is provided at the right end of the inner air duct 2, and a gas jet port 301 and an oxygen supply through hole 302 are provided at the right end of the gas duct 3. , and the gas pipeline 3 is connected with a gas inlet pipe 303, the gas inlet pipe 303 is connected with the side wall of the gas pipeline 3 and is far away from the gas outlet 301, the oxygen supply through hole 302 is arranged on the side wall of the gas pipeline 3 and is located at the right end of the gas outlet 301, and the oxygen supply through hole 302 connects the gas pipeline 3 and the oxygen pipeline 4, the right end of the oxygen pipeline 4 is provided with an oxygen outlet 401, and the oxygen pipeline 4 is connected with an oxygen inlet pipe 402, and the oxygen inlet pipe 40 2 is connected to the side wall of the oxygen pipeline 4 and is far away from the oxygen ejection port 401. The outer air ejection port 501 is arranged at the right end of the outer air pipeline 5. The cooling air ejection port 101, the inner air ejection port 201, the fuel gas ejection port 301, the oxygen ejection port 401 and the outer air ejection port 501 are all coaxially arranged, and each gas ejects a concentric parallel jet. The air intake device 6 is connected to the cooling air pipeline 1, the inner air pipeline 2 and the outer air pipeline 5 at the same time.

[0028] The basic working principle of the stratified burner involved in the utility model is: when the burner is ignited, the gas enters the gas pipeline 3 through the gas inlet pipe 303 and is ejected from the gas outlet 301 to form a gas jet; air enters the air inlet pipe 601, a part of the air enters the outer air pipeline 5 and is ejected from the outer air outlet 501 to form an outer air jet, and the other part of the air enters the inner air pipeline 2 through the air branch pipe 602 and is ejected from the inner air outlet 201 to form an inner air jet. At this time, the burner is ignited, and the inner air jet and the outer air jet can be mixed with the gas jet as an oxidant to assist in igniting the burner, so that the burner can perform low-temperature combustion and meet the low-temperature control requirements.

[0029] When the burner is running continuously, oxygen enters the oxygen pipe 4 through the oxygen inlet pipe 402, and a part of the oxygen is ejected from the oxygen ejection port 401 to form an oxygen jet. After the oxygen jet is mixed with the gas jet, it can help the gas burn, give full play to the performance of the gas, and meet the requirements of strong heating. Another part of the oxygen is ejected from the oxygen supply through hole 302, directly merged into the gas jet, and premixed with the gas jet, which can make the combustion of the low calorific value gas more stable and reduce the local high temperature of the burner, thereby reducing the oxidation and burning of the metal material at the burner head. When the burner is running continuously, the outer air pipe 5 can also cool the outer shell of the burner by conveying air, which can effectively reduce the local high temperature of the burner. The inner air pipe 2 and the gas pipe The outer air duct 5 and the gas duct 3 are adjacent to each other, which is convenient for the inner air jet to mix with the gas jet, and can ensure the stable combustion of the burner when there is no oxygen supply. The oxygen pipe 4 is located between the outer air duct 5 and the gas pipe 3, and can effectively isolate the high temperature and ensure the safe transportation of oxygen in the oxygen pipe 4, thereby improving the safety of the burner during the combustion process. The cooling air duct 1 can further improve the cooling efficiency of the burner when transporting air and reduce the local high temperature of the burner. The gas jets ejected from the cooling air nozzle 101, the inner air nozzle 201, the gas nozzle 301, the oxygen nozzle 401 and the outer air nozzle 501 are all concentric parallel jets, which can be superimposed on each other to form overlapping flows, which can effectively prolong the flame of the burner.

[0030] When the burner stops firing, after closing the oxygen inlet pipe 402, air can still continue to assist the combustion of the fuel gas until the fuel gas inlet pipe 303 and the air inlet pipe 601 are closed, thereby ensuring that the combustion process of the burner is safe and stable.

[0031] See also Figures 1 to 4 The present invention is further described below with a specific embodiment:

[0032] In this embodiment, see Figure 2As a preferred design, the air intake device 6 includes an air intake pipe 601, an air branch pipe 602 and a connecting mechanism 603. The air intake pipe 601 is connected to the side wall of the outer air duct 5. One end of the air branch pipe 602 is connected to the side wall of the air intake pipe 601, and the other end is connected to the side wall of the inner air duct 2. The inner air duct 2 is connected to the cooling air duct 1 through the connecting mechanism 603, wherein a part of the air in the air intake pipe 601 can directly enter the outer air duct 5, and another part of the air can enter the inner air duct 2 through the air branch pipe 602, and enter the cooling air duct 1 through the connecting mechanism 603, so that the air intake device 6 can simultaneously transport air to the outer air duct 5, the inner air duct 2 and the cooling air duct 1, and has a simple structure, and can meet the needs of burner cooling and the combination of gas and air; preferably, the connecting mechanism 603 includes a through hole arranged on the side wall of the cooling air duct 1, and the through hole can connect the cooling air duct 1 and the inner air duct 2.

[0033] In this embodiment, see Figure 1 and Figure 2 As a preferred design, it also includes an auxiliary device 7, which is connected to the left end of the cooling air duct 1.

[0034] In this embodiment, see Figure 5 As a preferred design, the auxiliary device 7 includes an ignition gun 701 for igniting the gas. The ignition gun 701 is located in the inner cavity of the cooling air duct 1. The ignition gun 701 can ignite the gas so that the burner can be ignited independently.

[0035] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the auxiliary device 7 includes a flame detector for detecting the combustion condition of the flame. The flame detector can detect the combustion condition of the burner in real time according to the combustion characteristics of the flame, thereby detecting the operating state of the burner.

[0036] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the auxiliary device 7 includes an observation mirror for observing the burning flame of the burner. The observation mirror can observe the burning flame of the burner and withstand strong visible light and strong ultraviolet light to protect the eyes of the staff.

[0037] In this embodiment, see Figure 3As a preferred design, the cooling air outlet 101, the inner air outlet 201, the gas outlet 301, the oxygen outlet 401 and the outer air outlet 501 can all control their ejection cross-sections and ejection volumes according to different gas types and pressures, so that the gas can be fully burned according to the calorific value characteristics of the gas to meet the production process requirements in different scenarios, and the combustion process of the burner is safe and controllable, which can further improve the safety of the burner during use.

[0038] In this embodiment, see Figure 3 As a preferred design, the inner air duct 2 and the outer air duct 5 are provided with swirl sheets 8 for controlling the length of the burner combustion flame. Specifically, different types of swirl sheets 8 can be selected according to actual conditions. The swirl sheets 8 can control the length of the burner combustion flame to become longer or shorter, and when the low calorific value hot gas is defired, the swirl sheets can stabilize the flame.

[0039] In this embodiment, see Figure 1 and Figure 4 As a preferred design, the cooling air duct 1, the inner air duct 2, the gas duct 3, the oxygen duct 4, the outer air duct 5 and the air intake device 6 are all made of heat-resistant steel, which is resistant to high-temperature oxidation corrosion and can be used in scenarios of frequent ignition and rapid cooling and heating.

[0040] As can be seen from the above, the layered burner of the utility model has the following beneficial effects:

[0041] By providing a cooling air duct 1, an inner air duct 2, a gas duct 3, an oxygen duct 4 and an outer air duct 5, the gas, air and oxygen are mixed and burned in layers, which can reduce the local high temperature of the burner, reduce the oxidation and burning of the burner, and improve the safety of the burner during the combustion process. By providing an air intake device 6, on the one hand, air can be transported, and on the other hand, the local temperature of the burner can be reduced, which has higher safety performance compared to the traditional water cooling method.

[0042] In summary, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A layered burner, characterized in that: The invention comprises a cooling air duct (1), an inner air duct (2), a gas duct (3), an oxygen duct (4), an outer air duct (5) and an air intake device (6); the cooling air duct (1), the inner air duct (2), the gas duct (3), the oxygen duct (4) and the outer air duct (5) are coaxially arranged in sequence from the inside to the outside, and the diameters of the cooling air duct (1), the inner air duct (2), the gas duct (3), the oxygen duct (4) and the outer air duct (5) increase in sequence; the right end of the cooling air duct (1) is provided with a cooling air outlet (101), the right end of the inner air duct (2) is provided with an inner air outlet (201), and the right end of the gas duct (3) is provided with a cooling air outlet (102). A gas jet outlet (301) and an oxygen supply through hole (302) are provided, and a gas intake pipe (303) is connected to the gas pipeline (3); the oxygen supply through hole (302) is arranged on the side wall of the gas pipeline (3) and is located at the right end of the gas jet outlet (301); the oxygen supply through hole (302) is connected to the gas pipeline (3) and the oxygen pipeline (4); the right end of the oxygen pipeline (4) is provided with an oxygen jet outlet (401), and the oxygen pipeline (4) is connected with the oxygen intake pipe (402); the right end of the outer air pipeline (5) is provided with an outer air jet outlet (501); and the air intake device (6) is simultaneously connected to the cooling air pipeline (1), the inner air pipeline (2) and the outer air pipeline (5).

2. The stratified burner according to claim 1, characterized in that: The air intake device (6) comprises an air intake pipe (601), an air branch pipe (602) and a connecting mechanism (603); the air intake pipe (601) is connected to an outer air duct (5); one end of the air branch pipe (602) is connected to the air intake pipe (601) and the other end is connected to an inner air duct (2); the inner air duct (2) is connected to a cooling air duct (1) via the connecting mechanism (603).

3. The stratified burner according to claim 1, characterized in that: It also comprises an auxiliary device (7), wherein the auxiliary device (7) is connected to the left end of the cooling air duct (1).

4. The stratified burner according to claim 3, characterized in that: The auxiliary device (7) comprises an ignition gun (701) for igniting gas, and the ignition gun (701) is located in the inner cavity of the cooling air duct (1).

5. The stratified burner according to claim 4, characterized in that: The auxiliary device (7) comprises a flame detector for detecting the combustion condition of the flame.

6. The stratified burner according to claim 4, characterized in that: The auxiliary device (7) comprises an observation mirror for observing the burning flame of the burner.

7. The stratified burner according to claim 1, characterized in that: The cooling air outlet (101), the inner air outlet (201), the gas outlet (301), the oxygen outlet (401) and the outer air outlet (501) can all control their outlet cross-sections and outlet volumes according to different gas types and pressures.

8. The stratified burner according to claim 1, characterized in that: The cooling air pipeline (1), the inner air pipeline (2), the gas pipeline (3), the oxygen pipeline (4), the outer air pipeline (5) and the air intake device (6) are all made of heat-resistant steel.

9. The stratified burner according to claim 1, characterized in that: The inner layer air duct (2) and the outer layer air duct (5) are provided with swirl plates (8) for controlling the length of the burner combustion flame.

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