Double-chamber kiln fuel spray gun
By designing a double-chamber kiln fuel lance, independent transportation and mixing of coal gas and pulverized coal were achieved, solving the problem of single fuel in the kiln lance, improving energy utilization efficiency and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-03
AI Technical Summary
The existing kiln spray guns can only meet the needs of a single fuel and cannot achieve the co-firing of two fuels in a double-chamber kiln, resulting in the inability to use some low-calorific-value fuels and causing energy waste.
Design a double-chamber kiln fuel spray gun, which adopts a parallel arrangement of gas pipeline and pulverized coal pipeline. The independent transportation and mixing of gas and pulverized coal are achieved through inlet and outlet sleeves, forming a spray gun structure with pulverized coal in the center and gas in the periphery. It can use pulverized coal or gas alone, or both fuels at the same time.
It enables diversified use of fuels, improves energy efficiency, saves fuel costs, and reduces maintenance costs by allowing the sleeve to be replaced when the spray gun is damaged.
Smart Images
Figure CN224080232U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lime vertical kiln technology, and in particular to a fuel spray gun for a double-chamber kiln. Background Technology
[0002] The spray gun is located inside the double-chamber kiln and its main function is to transport fuel to provide heat energy for limestone, ensuring that the stone in the kiln can be calcined into good finished limestone. The original kiln spray gun can only meet the needs of a single fuel and cannot solve the problem of co-firing two fuels in the double-chamber kiln. This easily leads to the fuel monotony of the double-chamber kiln, causing some enterprises to face the problem of low-calorific-value fuels being unusable and having to be directly discharged, resulting in energy waste. Utility Model Content
[0003] To address the aforementioned problems, this utility model provides a double-chamber kiln fuel spray gun, which solves the problem that existing kiln spray guns can only meet the requirements of a single fuel and cannot solve the problem of co-firing two fuels in a double-chamber kiln.
[0004] A double-chamber kiln fuel spray gun includes: a gas pipeline, a pulverized coal pipeline, an inlet sleeve, and an outlet sleeve;
[0005] Both the gas pipeline and the pulverized coal pipeline are L-shaped, each including a horizontal section at the top and a vertical section at the bottom. The gas pipeline is arranged in parallel on one side of the pulverized coal pipeline. The inlet end of the gas pipeline is fixed to the outer wall of the inlet sleeve and communicates with the inner cavity of the inlet sleeve. The inlet sleeve is fitted onto the horizontal section of the pulverized coal pipeline, and both ends of the inlet sleeve are sealed to the outer wall of the pulverized coal pipeline. A gas inlet pipe is provided on the inlet sleeve.
[0006] The outlet end of the gas pipeline is fixed to the outer wall of the outlet sleeve and connected to the outlet sleeve. The lower part of the pulverized coal pipeline passes through the outlet sleeve along the axial direction, and the bottom end of the outlet sleeve is flush with the outlet end of the pulverized coal pipeline. The top end of the outlet sleeve is sealed to the outer wall of the pulverized coal pipeline.
[0007] In some embodiments, the gas pipeline, pulverized coal pipeline, inlet sleeve, and outlet sleeve are all made of stainless steel.
[0008] In some embodiments, the inlet end of the gas pipeline is welded and fixed to the outer wall of the inlet sleeve, and the outlet end of the gas pipeline is welded and fixed to the outer wall of the outlet sleeve.
[0009] In some embodiments, both ends of the inlet sleeve are sealed to the outer wall of the pulverized coal pipeline using internally embedded packing in the flange, and the top end of the outlet sleeve is sealed to the outer wall of the pulverized coal pipeline using internally embedded packing in the flange.
[0010] In some embodiments, the inlet sleeve includes a main body and a peripheral portion detachably connected to the outside of the main body, the peripheral portion being located outside the double-chamber kiln, and the gas inlet pipe being disposed on the peripheral portion of the inlet sleeve.
[0011] In some embodiments, a gas cooling duct is provided on the outer periphery of the inlet sleeve near the gas inlet pipe.
[0012] In some embodiments, the main body and peripheral portion of the inlet sleeve are detachably connected together via a connecting flange.
[0013] In some embodiments, an anti-rotation flange is fixed to the outside of the inlet sleeve, and the anti-rotation flange is fixedly connected to the steel plate of the double-chamber kiln by bolts.
[0014] In some embodiments, a pulverized coal cooling duct is connected near the inlet end of the pulverized coal pipeline.
[0015] In some embodiments, a bracket is fixedly installed at the connection between the horizontal and vertical portions of the pulverized coal pipeline, and the bracket is used to fix the protective cover of the fuel spray gun.
[0016] Compared with the prior art, this utility model provides a fuel spray gun for a double-chamber kiln that achieves both fuel diversification and does not limit the use of a single fuel, solving the problem of the single fuel used in double-chamber kilns, improving energy utilization efficiency, further saving fuel costs, and when the spray gun is damaged, the outer part of the inlet sleeve and the outlet sleeve can be replaced, thereby greatly reducing maintenance costs. Attached Figure Description
[0017] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.
[0018] Figure 1 This is a schematic diagram of the structure of the double-chamber kiln fuel spray gun in an embodiment of this utility model;
[0019] Figure 2 This is an enlarged schematic diagram of the inlet end of the double-chamber kiln fuel spray gun in an embodiment of this utility model.
[0020] Figure 3 This is a schematic diagram illustrating the application of the double-chamber kiln fuel spray gun in an embodiment of this utility model.
[0021] In the diagram: 1. Pulverized coal pipeline; 2. Gas pipeline; 3. Inlet sleeve; 31. Main body; 32. Peripheral part; 4. Outlet sleeve; 5. Pulverized coal cooling duct; 6. Gas inlet pipe; 7. Gas cooling duct; 8. Anti-rotation flange; 9. Connecting flange; 10. Sealing flange; 11. Steel plate of double-chamber kiln; 12. Support; 13. Protective cover; 14. Bolt. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention:
[0023] like Figure 1 and 2As shown, this embodiment discloses a double-chamber kiln fuel spray gun. Specifically, the double-chamber kiln fuel spray gun includes a gas pipeline 2, a pulverized coal pipeline 1, an inlet sleeve 3, and an outlet sleeve 4. Both the gas pipeline 2 and the pulverized coal pipeline 1 are L-shaped, each including an upper horizontal portion and a lower vertical portion. The gas pipeline 2 is fixedly installed in parallel inside the pulverized coal pipeline 1. The inlet end of the gas pipeline 2 is fixed to the outer wall of the inlet sleeve 3 and communicates with the inner cavity of the inlet sleeve 3 (the inlet sleeve 3 and the pulverized coal pipeline 1 form a large pipe enveloping a small pipe, but are actually two independent spaces, with the outer part being the gas channel and the middle part being the pulverized coal channel). The inlet sleeve 3 is fitted onto the pulverized coal pipeline. On the horizontal part of 1 (the pulverized coal pipe 1 passes through the inlet sleeve 3), and both ends of the inlet sleeve 3 are sealed to the outer wall of the pulverized coal pipe 1. A gas inlet pipe 6 is provided on the inlet sleeve 3. The outlet end of the gas pipe 2 is fixed to the outer wall of the outlet sleeve 4 and is connected to the outlet sleeve 4. The lower part of the pulverized coal pipe 1 passes through the outlet sleeve 4 along the axial direction of the outlet sleeve 4, and the bottom end of the outlet sleeve 4 is flush with the outlet end of the pulverized coal pipe 1. The top end of the outlet sleeve 4 is sealed to the outer wall of the pulverized coal pipe 1 (the outlet sleeve 4 and the outlet end of the pulverized coal pipe 1 form a large pipe enveloping a small pipe, but they are actually two independent spaces. The outer part is the gas channel and the middle part is the pulverized coal channel). The dual-chamber kiln fuel lance is designed with a sleeve-type structure at both the front and rear ends, conveying pulverized coal and coal gas through two channels. Different fuels enter different fuel pipes, forming a lance with pulverized coal in the center and coal gas on the periphery. This allows the lance to convey pulverized coal for calcination, or convey coal gas for calcination alone, or calcination can be carried out simultaneously. The fuels in both channels of the dual-chamber kiln lance are sprayed out together into the kiln at the same position at the end of the lance, achieving uniform mixing at the end. This lance achieves fuel diversification without limiting the use of a single fuel, improving energy utilization efficiency and further saving fuel costs.
[0024] Specifically, the gas pipeline 2, pulverized coal pipeline 1, inlet sleeve 3, and outlet sleeve 4 are all made of stainless steel. The inlet end of the gas pipeline 2 is welded and fixed to the outer wall of the inlet sleeve 3, and the outlet end of the gas pipeline 2 is welded and fixed to the outer wall of the outlet sleeve 4. Both ends of the inlet sleeve 3 are sealed to the outer wall of the pulverized coal pipeline 1 using flanges with internally embedded packing, and the top end of the outlet sleeve 4 is sealed to the outer wall of the pulverized coal pipeline 1 using flanges with internally embedded packing.
[0025] In the embodiments of this utility model, the aforementioned inlet sleeve 3 includes a main body 31 and a peripheral part 32 detachably connected to the outside of the main body 31. The peripheral part 32 is located on the outside of the double-chamber kiln. The gas inlet pipe 3 is disposed on the peripheral part of the inlet sleeve 3. A pulverized coal cooling duct 5 is connected to the pulverized coal pipe 1 near the inlet end. A gas cooling duct 7 is disposed on the peripheral part 32 of the inlet sleeve 3 near the gas inlet pipe 6. The main body 31 and the peripheral part 32 of the inlet sleeve 3 are detachably connected together by a connecting flange 9, so that when problems occur with the gas inlet pipe 6 and the gas cooling duct 7 on the peripheral part 32 of the inlet sleeve 3, they can be easily disassembled for maintenance. At this time, the part of the pulverized coal pipe 1 that extends out of the inlet sleeve 3 needs to be cut off, and then welded back together after maintenance.
[0026] like Figure 1 and 3 As shown, an anti-rotation flange 8 is also fixed to the outside of the aforementioned inlet sleeve 3, and bolts 14 are fixedly connected between the anti-rotation flange 8 and the steel plate 11 of the double-chamber kiln to prevent the inlet sleeve 3 from rotating during use.
[0027] like Figure 3 As shown, the main body 31 of the aforementioned inlet sleeve 3 passes through the steel plate 11 of the double-chamber kiln in the middle. That is, part of the main body 31 of the inlet sleeve 3 is located inside the kiln chamber of the double-chamber kiln, and part is located outside the double-chamber kiln. The outer part 32 of the inlet sleeve 3 is located outside the double-chamber kiln. The gap between the inlet sleeve 3 and the steel plate 11 of the double-chamber kiln is sealed by packing embedded in the sealing flange 10. A bracket 12 is fixedly installed at the connection between the horizontal and vertical parts of the pulverized coal pipeline 1. The bracket 12 is used to fix the protective cover 13 of the fuel spray gun.
[0028] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.
[0029] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.
Claims
1. A dual port kiln fuel injection lance characterized by, The utility model relates to a double -walled kiln's coal gas pipeline and coal powder pipeline structure, which comprises: coal gas pipeline, coal powder pipeline, import sleeve and export sleeve; the coal gas pipeline and the coal powder pipeline are both L-shaped, the coal gas pipeline and the coal powder pipeline both comprise horizontal part in the upper and vertical part in the lower, and the coal gas pipeline is arranged in parallel on one side of the coal powder pipeline, the import end of the coal gas pipeline is fixed on the outer wall of the import sleeve and communicates with the inner cavity of the import sleeve, the import sleeve is sleeved on the horizontal part of the coal powder pipeline, and the both ends of the import sleeve are both in sealing connection with the outer wall of the coal powder pipeline, and the import sleeve is provided with coal gas import pipe; the export end of the coal gas pipeline is fixed on the outer wall of the export sleeve and communicates with the export sleeve, the lower part of the coal powder pipeline is arranged in the export sleeve along the axial direction of the export sleeve, and the bottom end of the export sleeve is flush with the export end of the coal powder pipeline, and the top end of the export sleeve is in sealing connection with the outer wall of the coal powder pipeline.
2. The dual chamber kiln fuel injection lance of claim 1 wherein, The material of the coal gas pipeline, the coal powder pipeline, the import sleeve and the export sleeve is stainless steel.
3. The dual chamber kiln fuel injection lance of claim 1 wherein, The import end of the coal gas pipeline is welded and fixed on the outer wall of the import sleeve, and the export end of the coal gas pipeline is welded and fixed on the outer wall of the export sleeve.
4. The dual chamber kiln fuel injection lance of claim 1 wherein, The both ends of the import sleeve are both in sealing connection with the outer wall of the coal powder pipeline through flange internal inlaying ring joint, and the top end of the export sleeve is in sealing connection with the outer wall of the coal powder pipeline through flange internal inlaying ring joint.
5. The dual chamber kiln fuel injection lance of claim 1 wherein, The import sleeve comprises main body part and peripheral part which is detachably connected to the outer side of the main body part, the peripheral part is located on the outer side of the double -walled kiln, and the coal gas import pipe is arranged on the peripheral part of the import sleeve.
6. The dual chamber kiln fuel injection lance of claim 5 wherein, The peripheral part of the import sleeve is provided with coal gas cooling air pipe near the position of the coal gas import pipe.
7. The dual chamber kiln fuel injection lance of claim 5 wherein, The main body part and the peripheral part of the import sleeve are detachably connected through connecting flange.
8. The dual chamber kiln fuel injection lance of claim 5 wherein, The outer side of the import sleeve is further fixed with anti -rotation flange, and the anti -rotation flange and the steel plate of the double -walled kiln are fixedly connected with bolt.
9. The dual chamber kiln fuel injection lance of claim 1 wherein, The coal powder pipeline is connected with coal powder cooling air pipe near the import end.
10. The dual chamber kiln fuel injection lance of claim 1 wherein, Support is fixedly arranged at the connecting position of the horizontal part and the vertical part of the coal powder pipeline, and the support is used for fixing the protective cover of the fuel injection gun.