An oxygen-enriched integrated burner for lead smelting

Abstract

The present invention relates to the technical field of burners, and particularly to an integrated oxygen-enriched burner for lead smelting. The existing burners cannot uniformly heat the materials in the furnace. An integrated oxygen-enriched burner for lead smelting includes an oxygen chamber, a fuel chamber, and a combustion head. The fuel chamber is connected to a plurality of fuel pipelines. The ends of the fuel pipelines away from the fuel chamber are dispersedly arranged at the combustion head and are respectively connected to combustion nozzles. Each combustion nozzle is a pipe structure with different bending angles and forms different inclination angles with the fuel pipelines. The oxygen chamber is connected to a plurality of oxygen-enriched channels. Each oxygen-enriched channel corresponds to and communicates with each combustion nozzle, heating the materials at different positions in the furnace with higher efficiency and more complete combustion, and having good development prospects in the technical field of burners.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and particularly to an oxygen-enriched integrated burner for lead smelting. Background Art

[0002] A burner is an important component in smelting furnace equipment. The existing oxygen-enriched combustion lance consists of a combustible fuel pipe and a pipe with a relatively high oxygen concentration. At one end of the combustion lance, the combustible material is mixed with oxygen to achieve an auxiliary combustion effect. The structural design of the burner largely determines various important factors such as whether the fuel in the furnace reacts sufficiently, the combustion efficiency, and the heat balance in the furnace.

[0003] The existing burner has a simple structure and cannot ensure uniform heating of the materials at different positions in the furnace. Summary of the Invention

[0004] In view of the above situation, to overcome the deficiencies of the prior art, the present invention provides an oxygen-enriched integrated burner for lead smelting, which solves the problem that the existing burner cannot uniformly heat the materials.

[0005] Its technical solution is that an oxygen-enriched integrated burner for lead smelting includes an oxygen chamber, a fuel chamber, and a combustion head. The fuel chamber is connected to a plurality of fuel pipes. The ends of the fuel pipes away from the fuel chamber are dispersedly arranged at the combustion head and are respectively connected to the combustion lance heads. Each combustion lance head is a pipe structure with different bending angles and forms different inclination angles with the fuel pipes. The oxygen chamber is connected to a plurality of oxygen-enriched channels. Each oxygen-enriched channel corresponds to and communicates with each combustion lance head. The fuel pipes and the oxygen-enriched channels meet at the combustion lance heads and are sprayed through the combustion lance heads with different inclination angles. Due to the different inclination angles of the combustion lance heads, different movement trajectories with different distances are formed after spraying, so as to ensure that the burner can uniformly heat the materials at different positions in the furnace. The original single-point combustion to ignite the fuel at other positions is changed to multi-point simultaneous combustion, with higher efficiency.

[0006] Furthermore, each combustion lance head includes an outer pipe body and an inner pipe. The outer pipe body and the inner pipe are connected by point fixation and form a communicating cavity therebetween. The inner pipe is connected to the fuel pipe and the inner wall of the end port away from the combustion pipe is provided with spiral teeth. The fuel passes through the inner pipe channel. The air outlet of the oxygen-enriched channel communicates with the cavity. The gas with a high oxygen content passes through the cavity, meets the fuel, and burns. The separated design of the inner pipe and the outer pipe body avoids the intersection of the fuel and the oxygen-enriched gas inside the combustion lance head, reducing the damage to the combustion lance head.

[0007] Furthermore, each spiral tooth is arranged in an array at an inclination angle of 13° - 18° in the circumferential direction of the combustion lance head port, so that the fuel is evenly ejected.

[0008] Furthermore, each of the combustion nozzles is fixed to the fuel pipeline through a connecting pipe. The connecting pipe is sleeved outside the fuel pipeline, and a flange is provided at one end away from the combustion nozzle. The connecting pipe is connected to the outer pipe body, and their outer diameters are kept the same. A cavity for the passage of oxygen-rich gas is formed between the connecting pipe and the combustion pipeline.

[0009] Furthermore, bevels are provided at the ends where the outer pipe body is connected to the connecting pipe and the inner pipe is connected to the fuel pipeline, and they are fixed by welding. The combustion nozzle needs to be made of thicker pipe material to ensure that it can withstand high-temperature combustion, but it is not easy to achieve connection. Bevels are made at the connection points of the combustion nozzle with the fuel pipeline and the oxygen-rich channel to facilitate welding and fixing.

[0010] Furthermore, flange plates are provided at the ends of the oxygen chamber and the fuel chamber close to the mouth, which is convenient for connection and ensures sealing.

[0011] Furthermore, each of the combustion nozzles is inclined obliquely downward to the inside of the burner. The combustion nozzles include a long-range nozzle, a medium-range nozzle, and a short-range nozzle. The inclination angle of the long-range nozzle is between 15° and 25°, and the spraying distance is far, which can ignite the fuel far from the burner in the furnace. The inclination angle of the medium-range nozzle is between 25° and 35°, which can ignite the fuel in the middle of the furnace. The inclination angle of the short-range nozzle is between 35° and 45°, which can ignite the fuel near the burner and below the burner in the furnace, taking into account the combustion of materials in multiple locations, far, near, and in the middle of the furnace, making the combustion more sufficient and uniform, and improving the efficiency.

[0012] Furthermore, a cooling water tank is arranged at the position of the combustion head. The cooling water tank includes a drain pipe and a water inlet pipe. The water inlet pipe is connected to an external water source, and it circulates in the cooling water tank to cool down the fuel pipeline and the oxygen-rich channel close to the combustion nozzle, playing a protective role for the device.

[0013] The technical effect of the present invention is that by setting combustion nozzles at different angles, the combustion of materials at different positions in the furnace is ensured. The internal and external pipe structure design of the combustion nozzle ensures uniform fuel discharge, avoids the intersection and ignition of oxygen-rich gas and fuel inside the combustion nozzle, extends the service life of components, makes the combustion more sufficient and uniform, is convenient for production, and improves the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention.

[0015] Figure 2 is a schematic side structural diagram of the present invention.

[0016] Figure 3 is a schematic structural diagram of the long-range nozzle of the present invention.

[0017] Figure 4 is a schematic structural diagram of the medium-range nozzle of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of the short-range gun head of the present invention.

[0019] In the figure: 1. Combustion gun head; 1.1 Long-range gun head; 1.2 Medium-range gun head; 1.3 Short-range gun head; 2. Fuel pipeline; 3. Connecting pipe; 4. Oxygen-rich channel; 5. Cooling water tank; 6. Drain pipe; 7. Water inlet pipe; 8. Fuel tank; 9. Oxygen tank. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In addition, it should also be noted that in the description of the present invention, 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1: Consisting of Figures 1 to 5Provided is an oxygen-enriched integrated burner for lead smelting, which includes an oxygen chamber 9, a fuel chamber 8 and a burner head. Flange plates are provided at the ends of the oxygen chamber 9 and the fuel chamber 8 close to the openings for easy connection and to ensure sealing. The fuel chamber 8 is connected to a plurality of fuel pipes 2. The ends of each of the fuel pipes 2 away from the fuel chamber 8 are dispersedly arranged at the burner head and are respectively connected to burner nozzles 1. Each of the burner nozzles 1 is a pipe structure with different bending angles and forms different inclination angles with the fuel pipes 2. Each of the burner nozzles inclines obliquely downward towards the inside of the burner. The burner nozzle 1 includes a long-range nozzle 1.1, a medium-range nozzle 1.2 and a short-range nozzle 1.3. The inclination angle of the long-range nozzle 1.1 is between 15° and 25°, and the injection distance is far, which can ignite the fuel far from the burner in the furnace. The inclination angle of the medium-range nozzle 1.2 is between 25° and 35°, which can ignite the fuel in the middle of the furnace. The inclination angle of the short-range nozzle 1.3 is between 35° and 45°, which can ignite the fuel near the burner and below the burner in the furnace, taking into account the combustion of materials at multiple positions, far, near and in the middle in the furnace, making the combustion more sufficient and uniform. The oxygen chamber 9 is connected to a plurality of oxygen-enriched channels 4. Each of the oxygen-enriched channels 4 corresponds to and communicates with each of the burner nozzles 1. The fuel pipes 2 and the oxygen-enriched channels 4 converge at the burner nozzle 1 and are sprayed through the burner nozzles with different inclination angles. Due to the different inclination angles of the burner nozzles 1, different movement trajectories with different distances are formed after spraying, so as to ensure that the burner can uniformly heat the materials at different positions in the furnace. The combustion changes from one-point combustion to ignite the fuel at other positions to multi-point simultaneous combustion, with higher efficiency. A cooling water tank 5 is arranged at the position of the burner head. The cooling water tank includes a drain pipe 6 and a water inlet pipe 7. The water inlet pipe 7 is connected to an external water source and circulates in the cooling water tank to cool down the fuel pipes 2 and the oxygen-enriched channels 4 close to the burner nozzles, playing a protective role for the device.

[0024] Embodiment 2: On the basis of Embodiment 1, each of the combustion nozzles 1 includes an outer tube body and an inner tube. The outer tube body and the inner tube are connected by point fixing and a communicating cavity is formed therebetween. The inner tube is communicated with the fuel pipeline 2 and spiral teeth are provided on the inner wall of the port at the end far from the combustion pipeline 2. Each of the spiral teeth is arranged in an array in the circumferential direction of the port of the combustion nozzle 1 at an inclination angle of 13°-18°, so that the fuel is ejected evenly. The fuel passes through the inner tube channel. The air outlet of the oxygen-enriched channel 4 is communicated with the cavity. The gas with high oxygen content passes through from the cavity, meets the fuel, and burns. The separated design of the inner tube and the outer tube body of the combustion nozzle avoids the intersection of the fuel and the oxygen-enriched gas inside the combustion nozzle, reducing the damage to the combustion nozzle. Each of the combustion nozzles 1 is fixed to the fuel pipeline 2 through a connecting pipe 3. The connecting pipe 3 is sleeved outside the fuel pipeline 2 and a flange is provided at the end far from the combustion nozzle 1. The connecting pipe 3 is connected to the outer tube body, and their outer diameters are kept the same. A cavity for the oxygen-enriched gas to pass through is formed between the connecting pipe and the combustion pipeline 2. Chamfers are provided at the connecting ends of the outer tube body and the connecting pipe 3, and the inner tube and the fuel pipeline 2, and they are fixed by welding. The combustion nozzle 1 needs to be made of thicker pipe materials to ensure that it can withstand high-temperature combustion, but it is not easy to achieve connection. Chamfers are provided at the connection points of the combustion nozzle and the fuel pipeline 2 and the oxygen-enriched channel 4 to facilitate welding and fixing.

[0025] Embodiment 3: On the basis of the above embodiments, the included angle formed by the intersection of the axis of the combustion nozzle 1 and the axis of the fuel channel 2 is the inclination angle of the combustion nozzle. The inclination angles of the long-range nozzle 1.1, the medium-range nozzle 1.2, and the short-range nozzle 1.3 are within their respective ranges and ensure that the difference in the inclination angles between the long-range nozzle 1.1 and the medium-range nozzle 1.2 is not less than 5°, and the difference in the inclination angles between the medium-range nozzle 1.2 and the short-range nozzle 1.3 is not less than 5°.

[0026] On the basis of the above embodiments, the fuel bin is filled with pulverized coal.

[0027] The technical effect of the present invention is that by setting combustion nozzles at different angles, the combustion of materials at different positions in the furnace is ensured. The internal and external tube structure design of the combustion nozzle ensures uniform fuel discharge, avoids the intersection and ignition of oxygen-enriched gas and fuel inside the combustion nozzle, extends the service life of components, makes the combustion more sufficient and uniform, and is convenient for production and improves efficiency.

[0028] The above has described the present invention in detail through specific implementation manners and embodiments, but these do not constitute limitations to the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An oxygen-enriched integrated burner for lead smelting, comprising an oxygen storage tank (9), a fuel storage tank (8) and a burner head, characterized in that, The fuel tank (8) is connected to a plurality of fuel pipelines (2). One end of each fuel pipeline (2) far away from the fuel tank (8) is dispersedly arranged at the burner head and is respectively connected to a combustion gun head (1). Each combustion gun head (1) is a pipe structure with different bending angles and forms different inclination angles with the fuel pipeline (2). The oxygen tank (9) is connected to a plurality of oxygen-rich channels (4). Each oxygen-rich channel (4) corresponds to and communicates with each combustion gun head (1).

2. The integrated oxygen-enriched burner for lead smelting according to claim 1, wherein Each combustion gun head (1) includes an outer pipe body and an inner pipe. The outer pipe body and the inner pipe are connected by point fixing and form a communicating cavity therebetween. The inner pipe communicates with the fuel pipeline (2), and spiral teeth are arranged on the inner wall of the port at one end far away from the fuel pipeline (2). The air outlet of the oxygen-rich channel (4) communicates with the cavity.

3. The integrated oxygen-enriched burner for lead smelting according to claim 2, characterized in that, Each of the spiral teeth is arranged in an array in the circumferential direction of the port of the combustion gun head (1) at an inclination angle of 13° - 18°.

4. The integrated oxygen-enriched burner for lead smelting according to claim 2, characterized in that, Each combustion gun head (1) is fixed to the fuel pipeline (2) through a connecting pipe (3). The connecting pipe (3) is sleeved outside the fuel pipeline (2), and a flange is arranged at one end far away from the combustion gun head (1). The connecting pipe (3) is connected to the outer pipe body.

5. An oxygen-enriched integrated burner for lead smelting according to claim 4, characterized in that, Bevel angles are provided at the ends where the outer pipe body is connected to the connecting pipe (3) and the inner pipe is connected to the fuel pipeline (2), and they are fixed by welding.

6. The integrated oxygen-enriched burner for lead smelting according to claim 1, characterized in that, Flange plates are provided at the ends of the oxygen tank (9) and the fuel tank (8) close to the mouth.

7. A lead smelting oxygen-enriched integrated burner according to any one of claims 1-6, characterized in that, Each combustion gun head inclines obliquely downward inside the burner. The combustion gun head (1) includes a long-range gun head (1.1), a medium-range gun head (1.2), and a short-range gun head (1.3). The inclination angle of the long-range gun head (1.1) is between 15° - 25°, the inclination angle of the medium-range gun head (1.2) is between 25° - 35°, and the inclination angle of the short-range gun head (1.3) is between 35° - 45°.

8. A lead smelting oxygen-enriched integrated burner according to any one of claims 1-6, characterized in that, A cooling water tank (5) is arranged at the position of the burner head. The cooling water tank includes a drain pipe (6) and a water inlet pipe (7).

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