Turbulent burner inlet elbow suitable for blending combustion of large-proportion lignite

Abstract

The utility model relates to the field of combustors, and discloses a turbulent burner inlet elbow suitable for large-proportion lignite blending combustion, which comprises a shell, a side insert tube communicated with the inside of the shell is fixedly mounted at one end of the shell, and a fixing block is fixedly connected to the outer side of one end, far away from the shell, of the side insert tube. By means of the structure, installation of a side face insertion pipe and a butt joint pipeline is facilitated, the installation process is simplified, and the labor amount is reduced.

Description

Technical Field

[0001] The utility model relates to the field of burners, in particular to an inlet elbow of a swirl burner adapted to the co-firing of a large proportion of lignite. Background Technique

[0002] A burner is a device that sprays fuel and air in a certain way for mixed combustion. Burners can be divided into industrial burners, combustion machines, and domestic burners. A swirl burner is a type of burner, and an inlet elbow is installed on the swirl burner. Currently, when the swirl burner elbow is in use, due to its complex structure and many openings, it can only be manufactured using wear-resistant steel or a manufacturing method with a carbon steel outer shell lined with ceramic patches. The main function is to improve the service life of the elbow by using wear-resistant steel or ceramic patch lining. Adding lignite to the fuel can effectively reduce the ignition temperature of the mixed fuel and shorten the burnout time. As the proportion of lignite co-firing increases, the ignition index, burnout index, and comprehensive combustion characteristic index of the mixed fuel all increase significantly. As the proportion of lignite co-firing increases, the CO2 emissions gradually decrease, the NO and NO2 emissions generally increase, and the SO2 and CO emissions show a fluctuating trend. Co-firing has a certain inhibitory effect on NOx emissions.

[0003] For example, the utility model with the publication (announcement) number: CN219120068U discloses an inlet elbow of a swirl burner, which includes an external steel shell. One side of the external steel shell is fixed with a connecting flange I, the other side of the external steel shell is fixed with a connecting flange II, one end of the external steel shell is fixed with a side insertion pipe, a fastening structure is arranged inside the side insertion pipe, the bottom end of the external steel shell is fixed with a connecting flange III, an inner lining silicon carbide layer is fixed inside the external steel shell, a paint layer is coated on the outer side of the external steel shell, and strengthening blocks are fixed at the interlayer inside the external steel shell. By setting the inner lining silicon carbide layer and adopting the step-by-step casting process of separately casting each inner surface, the internal casting of the overall silicon carbide wear-resistant layer is realized, and its service life is three to five times that of the wear-resistant steel deflector, solving the problems of the wear-resistant steel deflector being non-wear-resistant and easily damaged, and at the same time solving the problem of the easy detachment of the ceramic patch lining, greatly improving the service life of the elbow.

[0004] The structure of the above-mentioned utility model connects the pipes by setting fastening pins in the side insertion pipe. However, in the actual use process, the staff needs to spend a lot of time on the alignment of the screw holes of the side insertion pipe, the reserved holes of the docking pipe, and the fastening pins. At the same time, in the process of equipment use, the threaded connection is extremely easy to loosen at the threaded connection due to mechanical vibration, thus affecting the firmness of the pipe connection. Summary of the Invention

[0005] The utility model aims to provide an inlet elbow of a swirl burner suitable for the combustion of a large proportion of lignite, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an inlet elbow of a swirl burner suitable for burning a large proportion of lignite, comprising a shell, one end of which is fixedly equipped with a side insertion tube connected to the interior of the shell, and the side insertion tube is fixedly connected to the outside of one end away from the shell with a fixed block, and the fixed block is rotatably equipped with an installation assembly around the circumferential direction.

[0007] Preferably, first connecting flanges communicating with the interior of the shell are fixedly provided on both sides of the shell, and a second connecting flange communicating with the interior of the shell is fixedly provided on the bottom end of the shell.

[0008] Preferably, the mounting assembly comprises a rotating ring rotatably connected to the fixed block, and the rotating ring is an annular structure.

[0009] Preferably, a plurality of mounting sleeves are fixedly mounted on the outer side of one end of the rotating ring away from the side insertion tube, and each mounting sleeve is slidably penetrated by a limiting rod in a direction perpendicular to the outer side of the rotating ring.

[0010] Preferably: one end of each of the limit rods is arranged perpendicular to the inner wall of the rotating ring and slides therewith to extend into the interior thereof, and a slide plate is slidably arranged in each of the mounting sleeves along the sliding direction of the limit rod, and the slide plate is sleeved and fixed on the outer side of the limit rod.

[0011] Preferably, a spring is sleeved on the outer side of the limiting rod on one side of the slide, and two ends of the spring are respectively in contact with one end of the slide and one end of the inner wall of the mounting sleeve.

[0012] Preferably: each of the limit rods extends to one side of the rotating ring away from the side insertion tube and is set to a cross-sectional arc structure, and each limit rod is fixedly connected to a pull ring at one end away from the rotating ring, and a plurality of shift blocks are fixedly connected to the outer side of the rotating ring away from the installation sleeve.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model fixedly installs the housing on the burner through the first connection flange and the second connection flange, inserts the docking pipeline into the side insertion pipe, and inserts and limits the docking pipeline through a plurality of limiting rods and the same number of reserved holes of the docking pipeline, so as to carry out the fixed installation process of the pipeline. Insert the docking pipeline with reserved holes inserted and matched with the limiting rods into the rotating ring and contact one end of the limiting rods. Since one end of the limiting rod located on one side of the rotating ring away from one end of the side insertion pipe is set as an arc-shaped cross-section structure, during the insertion process of the docking pipeline, one end of the arc-shaped structure of the limiting rod is squeezed and slides away from the center position of the rotating ring. At the same time, the sliding plate sleeved and fixed on the outer side of the limiting rod slides along the installation sleeve and compresses the spring. Rotate the rotating block to make the rotating ring rotate around the fixed block, so that the reserved holes of the docking pipeline can be docked with the corresponding limiting rods after the docking pipeline is inserted. Thus, under the elastic force of the spring in the compressed state, one end of the arc-shaped structure of each limiting rod is sent into the reserved hole of the docking pipe, so as to realize the fixed installation process of the pipeline. The disassembly process can be carried out by pulling the pull ring to release the limit between each limiting rod and the reserved hole of the docking pipeline. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2 is an enlarged schematic diagram of the structure at A of the utility model.

[0017] In the figure: 1, housing; 2, side insertion pipe; 3, fixed block; 4, installation component; 5, first connection flange; 6, second connection flange; 41, rotating ring; 42, installation sleeve; 43, limiting rod; 44, sliding plate; 45, pull ring; 46, dial block. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0019] Please refer to Figure 1 - Figure 2 , the inlet elbow of the swirl burner adapted to the co-firing of large proportion of lignite in the figure shows, including a housing 1, one end of the housing 1 is fixedly installed with a side insertion pipe 2 communicated with its interior, and a fixed block 3 is fixedly connected to the outer side of the side insertion pipe 2 away from one end of the housing 1, and an installation component 4 is rotatably installed around the circumferential direction of the fixed block 3.

[0020] In this embodiment, first connection flanges 5 communicating with the inside thereof are fixedly arranged on both sides of the housing 1, and a second connection flange 6 communicating with the inside thereof is fixed to the bottom end of the housing 1. The mounting assembly 4 includes a rotating ring 41 rotatably and penetratingly connected to the fixed block 3, and the rotating ring 41 is of an annular structure. A plurality of mounting sleeves 42 are fixedly installed on the outer side of the rotating ring 41 away from one end of the side insertion pipe 2, and a limiting rod 43 is slidably and penetratingly arranged in each mounting sleeve 42 along a direction perpendicular to the outer side of the rotating ring 41. One end of each limiting rod 43 is arranged in a direction perpendicular to the inner wall of the rotating ring 41 and slidably penetrates and extends into the inside thereof. A slide plate 44 is slidably arranged in each mounting sleeve 42 along the sliding direction of the limiting rod 43, and the slide plate 44 is sleeved and fixed on the outer side of the limiting rod 43. A spring is sleeved on the outer side of the limiting rod 43 on one side of the slide plate 44, and both ends of the spring are respectively abutted against one end of the slide plate 44 and one end of the inner wall of the mounting sleeve 42. One side of each limiting rod 43 extending into the rotating ring 41 away from one end of the side insertion pipe 2 is arranged with an arc-shaped cross section, and a pull ring 45 is fixedly connected to one end of each limiting rod 43 away from the rotating ring 41. A plurality of dial blocks 46 are fixedly connected to the outer side of the rotating ring 41 away from the mounting sleeve 42.

[0021] Further, the housing 1 is fixedly installed with the burner through the first connection flange 5 and the second connection flange 6. The docking pipeline is inserted into the side insertion pipe 2, and the plurality of limiting rods 43 are inserted into and limited by the reserved holes with the same number as the docking pipeline, so as to carry out the fixed installation process of the pipeline. The docking pipeline with reserved holes inserted and matched with the limiting rods 43 is inserted into the rotating ring 41 and contacts one end of the limiting rod 43. Since one side of the limiting rod 43 located inside the rotating ring 41 away from one end of the side insertion pipe 2 is arranged with an arc-shaped cross section, during the insertion process of the docking pipeline, the arc-shaped end of the limiting rod 43 is squeezed and slides away from the center position of the rotating ring 41. At the same time, the slide plate 44 sleeved and fixed on the outer side of the limiting rod 43 slides along the inside of the mounting sleeve 42 and compresses the spring. By rotating the dial block 46, the rotating ring 41 rotates around the fixed block 3, so that the reserved holes of the docking pipeline can be docked with the corresponding limiting rods 43 after the docking pipeline is inserted. Thus, under the elastic force of the spring in the compressed state, one arc-shaped end of each limiting rod 43 is sent into the reserved hole of the docking pipe, so as to realize the fixed installation process of the pipeline. The disassembly process can be carried out by pulling the pull ring 45 to release the limit of each limiting rod 43 and the reserved hole of the docking pipeline.

[0022] Working principle of the utility model: The housing 1 is fixedly installed with the burner through the first connecting flange 5 and the second connecting flange 6. The docking pipe is inserted into the side insertion pipe 2. The plurality of limiting rods 43 are inserted and limited with the same number of reserved holes of the docking pipe, so as to carry out the fixed installation process of the pipe. The docking pipe with reserved holes inserted and matched with the limiting rods 43 is inserted into the rotating ring 41 and contacts one end of the limiting rod 43. Since one side of the limiting rod 43 located inside the rotating ring 41 and far from one end of the side insertion pipe 2 is provided with an arc-shaped cross-section structure, during the insertion process of the docking pipe, one end of the arc-shaped structure of the limiting rod 43 is squeezed and slides away from the center position of the rotating ring 41. At the same time, the slide plate 44 sleeved and fixed on the outer side of the limiting rod 43 slides along the installation sleeve 42 and compresses the spring. By rotating the dial block 46, the rotating ring 41 rotates around the fixed block 3, so that the reserved holes of the docking pipe can be docked with the corresponding limiting rods 43 after the docking pipe is inserted. Thus, under the elastic force of the spring in the compressed state, one end of the arc-shaped structure of each limiting rod 43 is sent into the reserved hole of the docking pipe, so as to realize the fixed installation process of the pipe. The disassembly process can be carried out by pulling the pull ring 45 to release the limit of each limiting rod 43 and the reserved hole of the docking pipe.

[0023] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An inlet elbow of a swirl burner suitable for burning a large proportion of lignite, comprising a housing (1), characterized in that: A side insertion tube (2) communicating with the interior of the shell (1) is fixedly mounted on one end of the shell (1), and a fixing block (3) is fixedly connected to the outer side of one end of the side insertion tube (2) away from the shell (1), and a mounting assembly (4) is mounted on the fixing block (3) so as to rotate around the circumferential direction; The mounting assembly (4) comprises a rotating ring (41) rotatably connected to the fixed block (3), and the rotating ring (41) is an annular structure; a plurality of mounting sleeves (42) are fixedly mounted on the outer side of one end of the rotating ring (41) away from the side insertion tube (2); each mounting sleeve (42) is provided with a limit rod (43) that is slidably penetrated in a direction perpendicular to the outer side of the rotating ring (41); one end of each limit rod (43) is provided perpendicular to the inner wall direction of the rotating ring (41) and is slidably penetrated and extended into the inner side of the rotating ring (41); a slide plate (43) is slidably provided in the inner side of each mounting sleeve (42) along the sliding direction of the limit rod (43) 44), and the slide plate (44) is sleeved and fixed on the outside of the limit rod (43); a spring is sleeved on the outside of the limit rod (43) on one side of the slide plate (44), and the two ends of the spring are respectively abutted against one end of the slide plate (44) and one end of the inner wall of the mounting sleeve (42); one end of each limit rod (43) extending into the rotating ring (41) away from the side insertion tube (2) is configured as a cross-sectional arc structure, and one end of each limit rod (43) away from the rotating ring (41) is fixedly connected to a pull ring (45); and a plurality of shifting blocks (46) are fixedly connected to the outside of one end of the rotating ring (41) away from the mounting sleeve (42).

2. The inlet elbow of the swirl burner suitable for large proportion of lignite blending according to claim 1 is characterized in that: First connecting flanges (5) communicating with the interior of the shell (1) are fixedly provided on both sides thereof, and a second connecting flange (6) communicating with the interior of the shell (1) is fixedly provided on the bottom end thereof.

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