一种用于煤粉燃烧器的冷却装置
By designing a cooling device consisting of an outer pipe and cooling components around the feed pipe, the problems of uneven coal powder distribution and localized high temperatures in the pulverized coal burner were solved, achieving stable conveying and temperature reduction, reducing ash melting, alleviating coking, and improving combustion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI YANCHANG CHINACOAL YULIN ENERGY CHEM
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-17
AI Technical Summary
The high coal powder concentration at the nozzle of the DC coal powder feed pipe leads to local high-temperature areas where ash melts and adheres, resulting in uneven coal powder distribution and some unburned coal powder forming unburned carbon particles, which seriously affects the coking of the water-cooled wall.
Design a cooling device including a feeding pipe, an outer pipe, a flow stabilizing component, and a cooling component. The flow stabilizing component stabilizes the flow of pulverized coal, the outer pipe is sleeved on the outer wall of the feeding pipe to form an annular cavity, and the cooling component reduces the temperature of the feeding pipe and the water-cooled wall to prevent ash from melting and adhering.
It achieves stable distribution of pulverized coal during the conveying process, reduces local temperature at the feed pipe nozzle, reduces ash and slag deposition, alleviates coking problems, promotes uniform mixing of pulverized coal and air, and improves combustion efficiency.
Smart Images
Figure CN224516834U_ABST
Abstract
Claims
1. A cooling device for a pulverized coal burner, characterized by, It comprises a feeding pipe (10), an outer pipe (20), a flow stabilizing assembly (30) and a cooling assembly (40); The feeding end of the feeding pipe (10) is communicated with an external feeding mechanism, and the output end thereof extends to a coal powder injection port (1), the outer wall of the coal powder injection port (1) is in contact with a water-cooled wall (2); The outer pipe (20) is sleeved on the peripheral part of the feeding pipe (10), and the inner wall of the outer pipe (20) is spaced apart from the outer wall of the feeding pipe (10); The flow stabilizing assembly (30) is fixedly arranged in the inner part of the feeding pipe (10), and the working end face of the flow stabilizing assembly (30) is parallel to the axial center of the feeding pipe (10); The cooling assembly (40) is arranged in the pipe cavity of the outer pipe (20) and is used for cooling the outer wall of the feeding pipe (10) and the outer wall of the side of the water-cooled wall (2) close to the coal powder injection port (1).
2. The cooling device for a coal powder burner according to claim 1, characterized by, The flow stabilizing assembly (30) comprises a mounting frame (31), a bearing (32), a fan blade (33) and a plurality of flow guide plates (34); The mounting frame (31) is arranged on the side of the outer pipe (20) close to the input end of the feeding pipe (10), the center of the mounting frame (31) is parallel to the axial direction of the feeding pipe (10), and a through hole for passing coal powder is arranged through the mounting frame (31) along the length direction thereof; The bearing (32) is arranged in the middle part of the mounting frame (31) in a same-core manner; The fan blade (33) is arranged on the side of the mounting frame (31) close to the input end of the feeding pipe (10) and is rotationally connected to the bearing (32); A plurality of the flow guide plates (34) are arranged on the side of the mounting frame (31) away from the fan blade (33) in a vertical direction, and the plate length direction of each of the plurality of flow guide plates (34) is parallel to the axial direction of the feeding pipe (10).
3. The cooling device for a coal powder burner according to claim 2, characterized by A hook (35) is fixedly arranged on the lower plate surface of each of the plurality of flow guide plates (34), a hanging rope (36) is arranged on the peripheral part of the hook (35), one end of the hanging rope (36) away from the hook (35) is fixedly connected to a bouncing ball (37), and the peripheral surface of the bouncing ball (37) can abut against the lower plate surface of the flow guide plate (34).
4. The cooling device for a coal powder burner according to claim 1, characterized by The cooling assembly (40) comprises an air inlet pipe (41), a baffle (42), a rotary cover (43) and an air outlet cylinder (44); The air inlet pipe (41) is fixedly arranged on the outer side of the outer pipe (20) and located at one end away from the coal powder injection port (1), the output end of the air inlet pipe (41) is communicated with the pipe cavity of the outer pipe (20), and the input end of the air inlet pipe (41) is communicated with an external air source; The baffle (42) is fixedly arranged on the input port of the air inlet pipe (41), and a first air hole (421) is arranged through the air inlet pipe (41) along the axial length direction thereof; The cover of the screw cap (43) is rotationally connected with the outer wall of the input end of the air inlet pipe (41), the inner wall of the cover plate of the screw cap (43) is in abutment with the upper end surface of the baffle (42), and the cover plate of the screw cap (43) is provided with second air holes (431) with diameters decreasing in sequence from large to small in a penetrating manner, the diameter of the first air hole (421) is the same as the smallest diameter of the second air hole (431), and the second air hole (431) is coaxially arranged with the first air hole (421); The air outlet cylinder (44) is arranged at one end of the outer pipe (20) close to the pulverized coal injection port (1), the lumen of the air outlet cylinder (44) is in communication with the lumen of the outer pipe (20), and the third air hole (441) is arranged on the side surface of the air outlet cylinder (44) close to the water-cooled wall (2) for cooling the water-cooled wall (2).
5. The cooling device for a coal powder burner according to claim 4, characterized by The air inlet pipe (41), the air outlet cylinder (44) and the outer pipe (20) are of an integrated structure.
6. The cooling device for a coal powder burner according to claim 5, characterized by The input port of the air inlet pipe (41) is of a stepped structure, the baffle (42) is placed on the table surface of the stepped structure, and the thickness of the baffle (42) is consistent with the height of the stepped structure.