Burner

Abstract

The utility model discloses a burner, and belongs to the technical field of rotary hearth furnaces. The burner is provided with an air inlet, a plurality of air nozzles communicated with the air inlet, a coal gas inlet and a plurality of coal gas nozzles communicated with the coal gas inlet; the multiple air nozzles and the multiple gas inlets are arranged at intervals in the X direction, and the air nozzles and the gas inlets are arranged at intervals in the Z direction; the air inlet is communicated with air, and the coal gas inlet is communicated with coal gas. After the burner is installed on the rotary hearth furnace, the gas nozzles are located below the air nozzles, the materials are located below the gas nozzles, and the gas nozzles are arranged at intervals in the X direction, so that the gas nozzles spray out flat gas, the flat gas becomes an air curtain for isolating the materials from air sprayed out of the air nozzles, the air and the materials are separated in the combustion process, and the combustion efficiency of the rotary hearth furnace is improved. And the materials can be heated and can also be in an oxygen-free environment, a good non-oxidation atmosphere is provided for the materials, the heating and reduction requirements of the materials are met, and the reduction efficiency of the materials is improved.

Description

Technical Field

[0001] This application belongs to the technical field of rotary hearth furnaces, and particularly relates to a burner. Background Technology

[0002] A rotary hearth furnace is a special heating furnace used to process zinc-containing solid waste from steel plants.

[0003] The rotary hearth furnace uses burners to introduce gas and air into the furnace for combustion to provide heat, thereby heating and reducing the material. During the reduction process, the reduced zinc metal also overflows into the furnace gas.

[0004] If a traditional flame burner is used to heat the material, although the flame burner can provide sufficient heat, the material reduction efficiency is poor. Utility Model Content

[0005] This application aims to at least partially solve the technical problem of poor material reduction efficiency when heating materials using traditional burners. To this end, this application provides a burner.

[0006] This application provides a burner having an air inlet and a plurality of air nozzles communicating with the air inlet, and also having a gas inlet and a plurality of gas nozzles communicating with the gas inlet; the plurality of air nozzles and the plurality of gas inlets are spaced apart along the X direction, and the air nozzles and the gas inlets are spaced apart along the Z direction; the air inlet is used to communicate with air, and the gas inlet is used to communicate with gas.

[0007] In some embodiments, the axis of the air nozzle is arranged along the Y direction.

[0008] In some embodiments, the axis of the gas nozzle is at an angle of 0 to 3° to the Y direction.

[0009] In some embodiments, along the Z-direction, a plurality of air nozzles are arranged in a one-to-one correspondence with a plurality of gas nozzles.

[0010] In some embodiments, the burner includes:

[0011] An airflow guiding assembly, having the air inlet and the air nozzle, is for connection to an air duct for transmitting air;

[0012] A gas guiding assembly, having the gas inlet and the gas nozzle, is used to connect to a gas pipeline for transmitting gas.

[0013] A connector is attached to the air guide assembly and the gas guide assembly.

[0014] In some embodiments, the airflow guide assembly includes an airflow guide and a plurality of air nozzles mounted on the airflow guide. The airflow guide is used to connect to the air duct. The airflow guide has the air inlet, and the air nozzles have the air nozzles. The air inlet and the air nozzles are connected through air channels formed in the airflow guide and the air nozzles.

[0015] In some embodiments, the air guide includes a first air guide section, a second air guide section, and a third air guide section connected in sequence; the air nozzle is installed on the third air guide section, and the first air guide section has the air inlet and is used to connect to the air duct; the air passage includes a first air channel, a second air channel, a third air channel, and a fourth air channel respectively opened on the first air guide section, the second air guide section, the third air guide section, and the air nozzle and connected in sequence; the first air channel has a circular cross-section, the third air channel has a rectangular cross-section, and the cross-sectional area of ​​the second air channel gradually increases along the airflow direction.

[0016] In some embodiments, the gas guiding assembly includes a gas guiding element and a plurality of gas nozzles installed on the gas guiding element. The gas guiding element is used to connect to the gas pipeline. The gas guiding element has the gas inlet, and the gas nozzles have the gas nozzles. The gas inlet and the gas nozzles are connected through gas channels formed on the gas guiding element and the gas nozzles.

[0017] In some embodiments, the gas guide component includes a first gas guide section, a second gas guide section, and a third gas guide section connected in sequence; the gas nozzle is installed on the third gas guide section, and the first gas guide section has the gas inlet and is used to connect to the gas pipeline; the gas passage includes a first gas passage, a second gas passage, a third gas passage, and a fourth gas passage that are respectively opened on the first gas guide section, the second gas guide section, the third gas guide section, and the gas nozzle and are connected in sequence; the first gas passage has a circular cross-section, the third gas passage has a rectangular cross-section, and the cross-sectional area of ​​the second gas passage gradually increases along the gas flow direction.

[0018] In some embodiments, the burner further includes a mounting member installed on at least one of the air guide assembly, the gas guide assembly, and the connector, the mounting member being used for connection to the furnace body.

[0019] This utility model has at least the following beneficial effects:

[0020] Multiple air nozzles are arranged in a row along the X-axis at intervals, and multiple gas nozzles are also arranged in a row along the X-axis at intervals. These two rows are spaced apart in the Z-axis. After the burners are installed on the rotary hearth furnace, the gas nozzles are located below the air nozzles, and the material is located below the gas nozzles. The multiple gas nozzles are spaced apart along the X-axis, causing them to spray flat gas. This flat gas acts as an air curtain, isolating the material from the air sprayed from the air nozzles. During combustion, this separation of air and material allows the material to be heated while remaining in an oxygen-free environment. This provides a good non-oxidizing atmosphere for the material, meeting its heating and reduction requirements and improving its reduction efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the burner structure in one or more embodiments of this application is shown.

[0023] Figure 2 A front view of the burner in one or more embodiments of this application is shown.

[0024] Figure 3 A top view of a burner in one or more embodiments of this application is shown.

[0025] Reference numerals: 100, burner; 100a, air inlet; 100b, air nozzle; 100c, gas inlet; 100d, gas nozzle; 100e, air passage; 100e1, first air passage; 100e2, second air passage; 100e3, third air passage; 100e4, fourth air passage; 100f, gas passage; 100f1, first gas passage; 100f2, second gas passage; 100f3, third gas passage; 10 0f4, fourth gas channel; 110, air guide assembly; 111, air guide component; 1111, first air guide section; 1112, second air guide section; 1113, third air guide section; 112, air nozzle; 120, gas guide assembly; 121, gas guide component; 1211, first gas guide section; 1212, second gas guide section; 1213, third gas guide section; 122, gas nozzle; 130, connector; 140, mounting component. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] The applicant of this application discovered that if a conventional flame burner is used to heat the material, although it can provide sufficient heat, the air injected by the burner will come into contact with the material and cannot provide a good non-oxidizing atmosphere for the material, thus the reduction efficiency of the material is poor.

[0031] Based on the above findings, this application provides a burner that can at least partially solve the technical problem of poor material reduction efficiency when heating materials using traditional burners.

[0032] This application is described below with reference to the accompanying drawings and specific embodiments:

[0033] For ease of description below, the X, Y, and Z directions are defined respectively, and the X, Y, and Z directions are perpendicular to each other. After the burner 100 is installed on the rotary hearth furnace, the height direction of the burner 100 is the Z direction, the width direction is the X direction, the length direction is the Y direction, and the plane containing the X and Y directions is the horizontal plane.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the burner 100 has an air inlet 100a and a plurality of air nozzles 100b connected to the air inlet 100a, and also has a gas inlet 100c and a plurality of gas nozzles 100d connected to the gas inlet 100c; the plurality of air nozzles 100b and the plurality of gas inlets 100c are all spaced apart along the X direction, and the air nozzles 100b and the gas inlets 100c are spaced apart along the Z direction; the air inlet 100a is used to communicate with air, and the gas inlet 100c is used to communicate with gas.

[0035] like Figure 1 As shown, multiple air nozzles 100b are arranged in a row along the X direction at intervals, and multiple gas nozzles 100d are also arranged in a row along the X direction at intervals. These two rows are spaced apart in the Z direction. After the burner 100 is installed on the rotary hearth furnace, the gas nozzles 100d are located below the air nozzles 100b, and the material is located below the gas nozzles 100d. The multiple gas nozzles 100d are spaced apart along the X direction, which will cause the multiple gas nozzles 100d to spray flat gas. This flat gas will become an air curtain that isolates the material from the air sprayed from the air nozzles 100b. During combustion, it isolates the air and the material, so that the material can be heated and is in an oxygen-free environment. This provides a good non-oxidizing atmosphere for the material, meets the heating and reduction requirements of the material, and improves the reduction efficiency of the material.

[0036] In some embodiments, the axis of the air nozzle 100b is arranged along the Y-direction. In this way, after the burner 100 is installed on the rotary hearth furnace, the axis of the air nozzle 100b is parallel to the horizontal plane, and the air nozzle 100b sprays horizontally. The applicant has found that if the axis of the air nozzle 100b sprays upwards along the Z-direction, uneven mixing of air and gas can easily occur, leading to incomplete combustion. If the axis of the air nozzle 100b sprays downwards along the Z-direction, the sprayed air can easily pass through the gas curtain and contact the material, failing to provide a good non-oxidizing atmosphere for the material. Arranging the axis of the air nozzle 100b along the Y-direction ensures good uniformity of gas and air mixing while providing a better non-oxidizing atmosphere for the material.

[0037] In some embodiments, the axis of the gas nozzle 100d is at an angle of 0° to 3° with the Y direction.

[0038] The angle 0° to 3° includes both 0° and 3°. With this design, after the burner 100 is installed on the rotary hearth furnace, the angle α between the axis of the gas nozzle 100d and the horizontal plane is between 0° and 3°. When it is 0°, the axis of the gas nozzle 100d is set along the Y-direction, parallel to the horizontal plane, and the gas is ejected along the horizontal plane. This helps to ensure the stability of the gas curtain formed by the gas nozzle 100d, making it less susceptible to agitation by air. When the angle between the gas nozzle 100d and the Y-direction is greater than 0° and less than or equal to 3°, the gas ejected from the gas nozzle 100d is ejected upwards along the Z-direction, which helps to improve the uniformity of the gas-air mixture.

[0039] In some embodiments, along the Z-direction, a plurality of air nozzles 100b are arranged in a one-to-one correspondence with a plurality of gas nozzles 100d. That is, the number of air nozzles 100b and gas nozzles 100d is the same, and each air nozzle 100b is located above each gas nozzle 100d. This design helps to ensure a more uniform mixing of gas and air, thus guaranteeing efficient combustion of the gas.

[0040] In some embodiments, the burner 100 includes an air guide assembly 110, a gas guide assembly 120, and a connector 130. The air guide assembly 110 has an air inlet 100a and an air nozzle 100b, and is used to connect to an air duct for transmitting air; the gas guide assembly 120 has a gas inlet 100c and a gas nozzle 100d, and is used to connect to a gas duct for transmitting gas; the connector 130 is connected to the air guide assembly 110 and the gas guide assembly 120.

[0041] The air guide assembly 110 is connected to the air duct, and after connection, the air inlet 100a of the air guide assembly 110 and the outlet of the air duct are connected and aligned. The gas guide assembly 120 is connected to the gas duct, and after connection, the gas inlet 100c of the gas guide assembly 120 and the outlet of the gas duct are connected and aligned. The connector 130 fixes the air guide assembly 110 and the gas guide assembly 120 together. With this design, the air guide assembly 110 and the gas guide assembly 120 can be processed separately. After they are processed separately, they are connected together by the connector 130 to form the burner 100, which facilitates the processing of the burner 100.

[0042] In some embodiments, the air guide assembly 110 is connected to the air duct via a flange, and the gas guide assembly 120 is connected to the gas duct via a flange.

[0043] In some embodiments, the airflow guiding assembly 110 includes an airflow guide 111 and a plurality of air nozzles 112 mounted on the airflow guide 111. The airflow guide 111 is used to connect to an air duct. The airflow guide 111 has an air inlet 100a, and the air nozzles 112 have air nozzles 100b. The air inlet 100a and the air nozzles 100b are connected by an air passage 100e formed in the airflow guide 111 and the air nozzles 112. Air discharged from the air outlet of the air duct enters the air passage 100e through the air inlet 100a, and under the guidance of the air passage 100e, is finally ejected from the air nozzles 100b.

[0044] In some embodiments, the air guide 111 includes a first air guide section 1111, a second air guide section 1112, and a third air guide section 1113 connected in sequence; an air nozzle 112 is installed on the third air guide section 1113; the first air guide section 1111 has an air inlet 100a and is used to connect to an air duct; the air passage 100e includes a first air passage 100e1, a second air passage 100e2, a third air passage 100e3, and a fourth air passage 100e4 respectively opened on the first air guide section 1111, the second air guide section 1112, the third air guide section 1113, and the air nozzle 112 and connected in sequence; the first air passage 100e1 has a circular cross-section, the third air passage 100e3 has a rectangular cross-section, and the cross-sectional area of ​​the second air passage 100e2 gradually increases along the airflow direction.

[0045] The cross-section of an air duct is typically circular. Setting the cross-section of the first air channel 100e1 to circular facilitates the connection between the first air guide section 1111 and the air duct. The cross-section of the third air channel 100e3 is rectangular, allowing all the multiple air nozzles 112 spaced apart along the X-direction to connect to the third air channel 100e3. Along the airflow direction, the cross-sectional area of ​​the second air channel 100e2 gradually increases, ensuring that the air discharged from the first air channel 100e1 is evenly distributed within the third air channel 100e3 under the guidance of the second air channel 100e2. This allows the air within the third air channel 100e3 to be evenly ejected through each air nozzle 100b, guaranteeing uniform air distribution.

[0046] In some embodiments, the gas guiding assembly 120 includes a gas guiding element 121 and a plurality of gas nozzles 122 installed on the gas guiding element 121. The gas guiding element 121 is used to connect to a gas pipeline. The gas guiding element 121 has a gas inlet 100c, and the gas nozzles 122 have gas nozzles 100d. The gas inlet 100c and the gas nozzles 100d are connected by a gas passage 100f formed on the gas guiding element 121 and the gas nozzles 122. The gas discharged from the gas pipeline outlet enters the gas passage 100f through the gas inlet 100c, and under the guidance of the gas passage 100f, it is finally ejected from the gas nozzle 100d.

[0047] In some embodiments, the gas guide 121 includes a first gas guide section 1211, a second gas guide section 1212, and a third gas guide section 1213 connected in sequence; a gas nozzle 122 is installed on the third gas guide section 1213; the first gas guide section 1211 has a gas inlet 100c and is used to connect to a gas pipeline; the gas passage 100f includes a first gas passage 100f1, a second gas passage 100f2, a third gas passage 100f3, and a fourth gas passage 100f4 respectively opened on the first gas guide section 1211, the second gas guide section 1212, the third gas guide section 1213, and the gas nozzle 122 and connected in sequence; the first gas passage 100f1 has a circular cross-section, the third gas passage 100f3 has a rectangular cross-section, and the cross-sectional area of ​​the second gas passage 100f2 gradually increases along the gas flow direction.

[0048] The cross-section of a gas pipeline is typically circular. Setting the cross-section of the first gas channel 100f1 to circular facilitates the connection between the first gas guide section 1211 and the gas pipeline. The cross-section of the third gas channel 100f3 is rectangular, ensuring that multiple gas nozzles 122 spaced along the X-direction can all connect to the third gas channel 100f3. Along the gas flow direction, the cross-sectional area of ​​the second gas channel 100f2 gradually increases, allowing the gas discharged from the first gas channel 100f1 to be evenly distributed within the third gas channel 100f3 under the guidance of the second gas channel 100f2. This ensures that the gas within the third gas channel 100f3 is evenly ejected through each gas nozzle 100d, guaranteeing uniform gas distribution.

[0049] In some embodiments, the air guide 111 and the gas guide 121 are spaced apart along the Y direction.

[0050] In some embodiments, along the Y direction, the connector 130 is located between the air guide 111 and the gas guide 121, and is welded to the air guide 111 and the gas guide 121.

[0051] In some embodiments, multiple connectors 130 are spaced apart along the X direction, and the connectors 130 are plate-shaped.

[0052] In some embodiments, the first air channel 100e1, the second air channel 100e2, the first gas channel 100f1, and the second gas channel 100f2 are all arranged along the Z-direction. The fourth air channel 100e4 and the fourth gas channel 100f4 are arranged along the Y-direction. Along the Z-direction, the fourth air channel 100e4 is located below the second air channel 100e2, and the third air channel 100e3 is arc-shaped. Along the Z-direction, the fourth gas channel 100f4 is located below the second gas channel 100f2, and the third gas channel 100f3 is arc-shaped.

[0053] In some embodiments, the burner 100 further includes a mounting member 140, which is mounted on at least one of the air guide assembly 110, the gas guide assembly 120, and the connector 130, and is used for connection to the furnace body. The burner 100 is fixed to the rotary hearth furnace by the mounting member 140.

[0054] In some embodiments, the mounting component 140 has multiple clearance holes, through which it is fitted onto the air nozzle 112 and the gas nozzle 122, and is fixedly connected to the third air guide section 1113 and the third gas guide section 1213. The mounting component 140 also has multiple bolt mounting holes, through which the mounting component 140 and the rotary hearth furnace are fixedly connected by bolts installed in the bolt mounting holes.

[0055] In some embodiments, the mounting member 140 is in the shape of a rectangular plate, and a ring of bolt mounting holes is provided on the mounting member 140 at intervals along its edge.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0057] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0058] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A burner, characterized in that, It has an air inlet (100a) and a plurality of air nozzles (100b) communicating with the air inlet (100a), and also has a gas inlet (100c) and a plurality of gas nozzles (100d) communicating with the gas inlet (100c); the plurality of air nozzles (100b) and the plurality of gas inlets (100c) are all spaced apart along the X direction, and the air nozzles (100b) and the gas inlets (100c) are spaced apart along the Z direction; the air inlet (100a) is used to communicate with air, and the gas inlet (100c) is used to communicate with gas.

2. The burner according to claim 1, characterized in that, The axis of the air nozzle (100b) is set along the Y direction.

3. The burner according to claim 1, characterized in that, The axis of the gas nozzle (100d) is at an angle of 0 to 3° to the Y direction.

4. The burner according to claim 1, characterized in that, Along the Z-direction, a plurality of air nozzles (100b) are arranged in a one-to-one correspondence with a plurality of gas nozzles (100d).

5. The burner according to any one of claims 1-4, characterized in that, The burner (100) includes: An air guide assembly (110) having the air inlet (100a) and the air nozzle (100b) is for connection to an air duct for transmitting air; A gas guiding assembly (120) having the gas inlet (100c) and the gas nozzle (100d) is used to connect to a gas pipeline for transmitting gas. A connector (130) is connected to the air guide assembly (110) and the gas guide assembly (120).

6. The burner according to claim 5, characterized in that, The air guide assembly (110) includes an air guide (111) and a plurality of air nozzles (112) mounted on the air guide (111). The air guide (111) is used to connect to the air duct. The air guide (111) has the air inlet (100a), and the air nozzles (112) have the air nozzles (100b). The air inlet (100a) and the air nozzles (100b) are connected by an air passage (100e) formed on the air guide (111) and the air nozzles (112).

7. The burner according to claim 6, characterized in that, The air guide (111) includes a first air guide section (1111), a second air guide section (1112), and a third air guide section (1113) connected in sequence; the air nozzle (112) is installed on the third air guide section (1113); the first air guide section (1111) has the air inlet (100a) and is used to connect to the air duct; the air passage (100e) includes sections respectively opened in the first air guide section (1111), the second air guide section (1112), and the third air guide section (1113). The air flow section (1112), the third air guide section (1113), and the air nozzle (112) are connected in sequence to form an air first channel (100e1), an air second channel (100e2), an air third channel (100e3), and an air fourth channel (100e4); the air first channel (100e1) has a circular cross-section, the air third channel (100e3) has a rectangular cross-section, and the cross-sectional area of ​​the air second channel (100e2) gradually increases along the air flow direction.

8. The burner according to claim 5, characterized in that, The gas guiding assembly (120) includes a gas guiding component (121) and a plurality of gas nozzles (122) installed on the gas guiding component (121). The gas guiding component (121) is used to connect to the gas pipeline. The gas guiding component (121) has the gas inlet (100c), and the gas nozzles (122) have the gas nozzles (100d). The gas inlet (100c) and the gas nozzles (100d) are connected by gas channels (100f) opened on the gas guiding component (121) and the gas nozzles (122).

9. The burner according to claim 8, characterized in that, The gas guide component (121) includes a first gas guide section (1211), a second gas guide section (1212), and a third gas guide section (1213) connected in sequence; the gas nozzle (122) is installed in the third gas guide section (1213); the first gas guide section (1211) has the gas inlet (100c) and is used to connect to the gas pipeline; the gas passage (100f) includes sections respectively opened in the first gas guide section (1211) and the second gas guide section (1213). The gas flow guide section (1212), the third gas flow guide section (1213), and the gas nozzle (122) are connected in sequence to the gas first channel (100f1), the gas second channel (100f2), the gas third channel (100f3), and the gas fourth channel (100f4); the gas first channel (100f1) has a circular cross-section, the gas third channel (100f3) has a rectangular cross-section, and the cross-sectional area of ​​the gas second channel (100f2) gradually increases along the gas flow direction.

10. The burner according to claim 5, characterized in that, The burner (100) further includes a mounting member (140) which is installed on at least one of the air guide assembly (110), the gas guide assembly (120) and the connector (130), and the mounting member (140) is used to connect to the furnace body.

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