Coal water slurry nozzle for boiler burner
By using tungsten carbide material and specific structural design in the water-coal slurry nozzle, the high-temperature oxidation capacity is enhanced, and the nozzle deformation and oxidation capacity is solved in the high-temperature environment is solved, the service life is extended and the normal operation of the boiler is ensured.
Patent Information
- Application Number
- CN202420700496.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-08
AI Technical Summary
The water and coal slurry nozzle is prone to deformation and poor high-temperature oxidation capacity in high-temperature environments, resulting in short service life, prone to cracking or wear and deformation, and cannot meet the long-term normal operation needs of the boiler burner.
A water and coal slurry nozzle including atomizer body, atomization housing, a flow guide, locking protective parts and inner support protective parts was designed. It is reinforced by tungsten carbide material and passes through multiple atomization channels and slurry channels. The design combines the structure of the tungsten carbide fixed ring and threaded pipe to form a mixing chamber and spray water and coal slurry to enhance the high-temperature oxidation capacity.
It effectively avoids cracks and wear deformation of the water and coal slurry nozzle, extends the service life, and ensures the normal operation of the boiler burner.
Smart Images
Figure CN222278568U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water-coal slurry nozzles, in particular to a water-coal slurry nozzle for a boiler burner. Background Art
[0002] The water-coal slurry nozzle of the boiler burner is an important component in the coal-fired system. Its main purpose is to transport coal powder into the boiler combustion chamber. On the one hand, it is subjected to the erosion and wear of coal powder, and on the other hand, it is connected to the boiler. The working environment of the water-coal slurry nozzle is very harsh, and its working temperature in the boiler combustion chamber is as high as 900-1200℃.
[0003] At present, water-coal slurry nozzles are prone to deformation and poor high-temperature oxidation ability, which causes the nozzles to be scrapped due to cracking or wear and deformation before an overhaul cycle. Utility Model Content
[0004] The purpose of the utility model is to solve the above-mentioned problems and to propose a water-coal slurry nozzle for a boiler burner.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a water-coal slurry nozzle for a boiler burner, which includes an atomizer body, an atomizing outer cover, a flow guide, a locking protective member and an inner support protective member, one end of the atomizer body is against the atomizing pipe and the slurry pipe, the atomizing outer cover is covered on the atomizer body, and the atomizing outer cover is screwed to the atomizing pipe, so that a mixing chamber is formed between the atomizing outer cover and the atomizer body, and the atomizer body is provided with a plurality of first atomizing channels, a plurality of first atomizing channels, and a plurality of first atomizing channels that penetrate the atomizer body. The second atomization channel and the slurry channel, the slurry channel connects the slurry pipeline and the mixing bin, the guide is installed on the atomization cover, and the guide is aligned with the slurry pipeline, a plurality of the first atomization channels and a plurality of the second atomization channels all connect the atomization pipeline and the mixing bin, the inner support guard is inserted into a plurality of the first atomization channels, a plurality of injection holes connected to the mixing bin are provided on the atomization cover, the locking guard fits the atomization cover, and the locking guard extends into the plurality of injection holes.
[0006] As a further description of the above technical solution:
[0007] The inner support protection member includes a tungsten carbide fixing ring and a plurality of tungsten carbide fixing tubes, the tungsten carbide fixing ring is welded on the atomizer body, the plurality of tungsten carbide fixing tubes are welded on the tungsten carbide fixing ring, and the plurality of tungsten carbide fixing tubes are inserted into a plurality of the first atomization channels.
[0008] As a further description of the above technical solution:
[0009] The locking protective member includes a tungsten carbide protective member and a plurality of tungsten carbide threaded tubes. The tungsten carbide protective member is attached to the inner wall of the atomizing outer cover. The plurality of tungsten carbide threaded tubes are inserted into the plurality of injection holes, and the plurality of tungsten carbide threaded tubes are threadedly connected to the tungsten carbide protective member.
[0010] As a further description of the above technical solution:
[0011] The tungsten carbide threaded tube is provided with a flange, and the flange abuts against the outer wall of the atomizing outer cover.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0013] In the utility model, the water-coal slurry enters the mixing bin through the slurry pipe and the slurry channel, and after combining with the water vapor in the atomization pipe that enters the mixing bin through the first atomization channel and the second atomization channel, the water-coal slurry is sprayed out from the injection hole. The locking protective part and the inner support protective part of the assembled design have strong high-temperature oxidation ability, which plays a role of reinforcement and protection, avoids cracking or wear and deformation of the water-coal slurry nozzle, prolongs the service life of the water-coal slurry nozzle, and ensures the normal operation of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The figure is a schematic diagram of the overall structure of a water-coal slurry nozzle for a boiler burner.
[0015] Figure 2 An explosion-proof device for a water-coal slurry nozzle used in a boiler burner Figure 1 .
[0016] Figure 3 An explosion-proof device for a water-coal slurry nozzle used in a boiler burner Figure 2 .
[0017] Figure 4 A cross-sectional view of a water-coal slurry nozzle for a boiler burner.
[0018] Legend:
[0019] 1. Atomizer body; 2. Atomizer cover; 3. Guide piece; 4. Locking guard; 41. Tungsten carbide guard; 42. Tungsten carbide threaded tube; 5. Inner support guard; 51. Tungsten carbide fixing ring; 52. Tungsten carbide fixing tube; 6. Atomizer pipeline; 7. Slurry pipeline; 8. Mixing chamber; 9. First atomizer channel; 10. Second atomizer channel; 11. Slurry channel; 12. Spray hole; 13. Flanging. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-4 The utility model provides a technical solution: a water-coal slurry nozzle for a boiler burner, comprising an atomizer body 1, an atomizing outer cover 2, a flow guide 3, a locking protective member 4 and an inner support protective member 5, one end of the atomizer body 1 is against an atomizing pipe 6 and a slurry pipe 7, the atomizing outer cover 2 is covered on the atomizer body 1, and the atomizing outer cover 2 is screwed to the atomizing pipe 6, so that a mixing chamber 8 is formed between the atomizing outer cover 2 and the atomizer body 1, and the atomizer body 1 is provided with a plurality of first atomizing channels 9, a plurality of second atomizing channels 10 and a slurry channel 7 penetrating the atomizer body 1. The material channel 11, the slurry channel 11 is connected to the slurry pipeline 7 and the mixing bin 8, the guide member 3 is installed on the atomizing outer cover 2, and the guide member 3 is aligned with the slurry pipeline 7, a plurality of the first atomizing channels 9 and a plurality of the second atomizing channels 10 are connected to the atomizing pipeline 6 and the mixing bin 8, the inner support guard 5 is inserted into the plurality of first atomizing channels 9, a plurality of injection holes 12 connected to the mixing bin 8 are opened on the atomizing outer cover 2, the locking guard 4 is attached to the atomizing outer cover 2, and the locking guard 4 extends into the plurality of injection holes 12;
[0022] The inner support protection member 5 includes a tungsten carbide fixing ring 51 and a plurality of tungsten carbide fixing tubes 52. The tungsten carbide fixing ring 51 is welded to the atomizer body 1. The plurality of tungsten carbide fixing tubes 52 are welded to the tungsten carbide fixing ring 51. The plurality of tungsten carbide fixing tubes 52 are inserted into a plurality of the first atomization channels 9. The tungsten carbide fixing ring 51 and the tungsten carbide fixing tubes 52 guide the fluid flowing through the first atomization channel 9 to prevent the fluid from directly acting on the inner wall of the first atomization channel 9.
[0023] The locking protective member 4 includes a tungsten carbide protective member 41 and a plurality of tungsten carbide threaded tubes 42. The tungsten carbide protective member 41 is attached to the inner wall of the atomizing outer cover 2. The plurality of tungsten carbide threaded tubes 42 are inserted into the plurality of injection holes 12, and the plurality of tungsten carbide threaded tubes 42 are threadedly connected to the tungsten carbide protective member 41. The tungsten carbide protective member 41 and the tungsten carbide threaded tubes 42 contact the water-coal slurry flowing through the injection holes 12 and the mixing bin 8, which plays a role of structural protection, prevents the water-coal slurry nozzle from cracking or wearing and deforming, and is also convenient for assembly;
[0024] The tungsten carbide threaded tube 42 is provided with a flange 13 , and the flange 13 abuts against the outer wall of the atomizing outer cover 2 to ensure the installation stability of the tungsten carbide threaded tube 42 and the tungsten carbide protective member 41 .
[0025] Working principle: The water-coal slurry enters the mixing chamber 8 from the slurry pipe 7 and the slurry channel 11, and enters the mixing chamber 8 with the water vapor in the atomization pipe 6 through the first atomization channel 9 and the second atomization channel 10, and the water-coal slurry is ejected from the injection hole 12. During the process, the tungsten carbide fixing ring 51 and the tungsten carbide fixing tube 52 guide the fluid flowing through the first atomization channel 9 to prevent the fluid from directly acting on the inner wall of the first atomization channel 9. The tungsten carbide protective member 41 and the tungsten carbide threaded tube 42 contact the water-coal slurry flowing through the injection hole 12 and the mixing chamber 8, playing a role of structural protection, preventing the water-coal slurry nozzle from cracking or wear and deformation, and facilitating assembly.
[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A water-coal slurry nozzle for a boiler burner, characterized in that: The invention comprises an atomizer body (1), an atomizing outer cover (2), a flow guide (3), a locking protective piece (4) and an inner support protective piece (5); one end of the atomizer body (1) abuts against an atomizing pipe (6) and a slurry pipe (7); the atomizing outer cover (2) covers the atomizer body (1), and the atomizing outer cover (2) is screwed to the atomizing pipe (6), so that a mixing chamber (8) is formed between the atomizing outer cover (2) and the atomizer body (1); the atomizer body (1) is provided with a plurality of first atomizing channels (9), a plurality of second atomizing channels (10) and a slurry channel (11) penetrating the atomizer body (1); the slurry channel (11) The slurry pipeline (7) and the mixing chamber (8) are connected, the guide member (3) is installed on the atomizing outer cover (2), and the guide member (3) is aligned with the slurry pipeline (7), a plurality of the first atomizing channels (9) and a plurality of the second atomizing channels (10) are connected to the atomizing pipeline (6) and the mixing chamber (8), the inner support protective member (5) is inserted into the plurality of first atomizing channels (9), a plurality of injection holes (12) connected to the mixing chamber (8) are provided on the atomizing outer cover (2), the locking protective member (4) is fitted to the atomizing outer cover (2), and the locking protective member (4) extends into the plurality of injection holes (12).
2. The water-coal slurry nozzle for a boiler burner according to claim 1, characterized in that: The inner support protection member (5) comprises a tungsten carbide fixing ring (51) and a plurality of tungsten carbide fixing tubes (52); the tungsten carbide fixing ring (51) is welded to the atomizer body (1); the plurality of tungsten carbide fixing tubes (52) are welded to the tungsten carbide fixing ring (51); and the plurality of tungsten carbide fixing tubes (52) are inserted into a plurality of the first atomization channels (9).
3. The water-coal slurry nozzle for a boiler burner according to claim 1, characterized in that: The locking protective member (4) comprises a tungsten carbide protective member (41) and a plurality of tungsten carbide threaded tubes (42), wherein the tungsten carbide protective member (41) is attached to the inner wall of the atomizing outer cover (2), the plurality of tungsten carbide threaded tubes (42) are inserted into the plurality of injection holes (12), and the plurality of tungsten carbide threaded tubes (42) are threadedly connected to the tungsten carbide protective member (41).
4. The water-coal slurry nozzle for a boiler burner according to claim 3, characterized in that: The tungsten carbide threaded tube (42) is provided with a flange (13), and the flange (13) abuts against the outer wall of the atomizing outer cover (2).