Anti-clogging feed device for a cold slag machine

Abstract

The utility model discloses a kind of anti-clogging's cold slag machine feeding device, it is related to cold slag machine technical field;The device includes feed pipe assembly, clearing block component, anti-clogging component and end sealing assembly;The feed pipe assembly is constituted by vertical section and inclined section;The anti-clogging component is located in inclined section, including vertical baffle and the inclined flow guide plate of ceramic wear-resistant lining plate;The clearing block component includes high-frequency air cannon and level detection device, high-frequency air cannon is fixed by mounting plate with second heat insulation pad block, its spray pipe is inserted into pipe through cooling jacket short pipe and is towards the initial end of flow guide plate, level detection device is located downstream vertical baffle and is connected with high-frequency air cannon signal;The end sealing assembly uses concave-convex flange structure, and clamps the flexible graphite composite gasket with L-shaped metal protection ring.The utility model can effectively prevent and automatically remove blockage, significantly improve sealing reliability and the service life of clearing block device under high temperature, guarantee system stable operation.

Description

Technical Field

[0001] This utility model relates to the field of cold slag machine technology, and in particular to a cold slag machine feeding device that prevents clogging. Background Technology

[0002] The drum-type slag cooler is a key auxiliary machine in a coal-fired boiler system, responsible for recovering the sensible heat of high-temperature slag and cooling it. Its feed inlet, as the entrance to the high-temperature slag, operates in an extremely harsh environment. Currently, this component commonly suffers from the following technical defects: Easy to clog and slag spray: The existing feeding structure is simple. Slag flows in directly and is easy to accumulate in the pipeline, or reacts instantly with the internal cold air and moisture to generate steam, which leads to pressure increase and slag spray. Frequent shutdowns for cleaning are required, affecting continuous operation.

[0003] Poor sealing reliability: The dynamic seal between the rotating drum and the fixed feed pipe, as well as the static seal of the end cover, are exposed to high temperature and dust environment for a long time. Traditional seals are prone to wear and erosion, resulting in air and dust leakage and reducing system efficiency.

[0004] Severe wear and difficult maintenance: Slag causes rapid erosion and wear on the pipe wall and internal components, and the integral welded feed pipe is extremely inconvenient to repair after blockage or wear, resulting in high maintenance costs.

[0005] Therefore, there is a need to provide a cold slag machine feeding device that can effectively prevent clogging, provide reliable sealing, and is easy to maintain. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned technical problems and provide a clogging-proof feeding device for a cold slag machine.

[0007] To achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by this utility model is: a cold slag machine feeding device for preventing blockage, including a feeding pipe assembly, a blockage clearing assembly, an anti-blockage assembly, and an end sealing assembly, characterized in that: the feeding pipe assembly includes a vertical section and an inclined section, and the outlet end of the vertical section and the inlet end of the inclined section are detachably fixedly connected by a flange connection structure. The anti-clogging component is disposed in the inner cavity of the inclined section. The anti-clogging component includes a vertical baffle and an inclined guide plate. The vertical baffle is used to receive slag from the vertical section, and the inclined guide plate is used to guide the slag to flow towards the drum. The slag-facing surface of the inclined guide plate is provided with a ceramic wear-resistant lining plate. The unblocking assembly includes a high-frequency air cannon and a level detection device. The high-frequency air cannon is fixed to the outer wall of the vertical section by a mounting plate. A circular hole is opened in the pipe wall of the vertical section, and an inclined short pipe is welded to the outer wall at the circular hole. The axis of the short pipe is inclined downward with respect to the horizontal plane. The spray pipe of the high-frequency air cannon extends into the circular hole through the inclined short pipe, and its outlet direction is towards the starting end of the inclined guide plate. The level detection device is set on the outer wall of the inclined section, and its detection direction is towards the starting end of the inclined guide plate. The level detection device is signal connected to the high-frequency air cannon. The end sealing assembly includes an end cap and a roller body. The end cap has heat dissipation fins on one side and a groove on the other side. The end face of the roller body has a protrusion that mates with the groove. A flexible graphite composite gasket is pressed between the groove and the protrusion. An L-shaped metal protective ring is embedded in the inner ring of the flexible graphite composite gasket. The radial vertical edge of the L-shaped metal protective ring fits against the radial inner wall of the groove, and its axial bottom edge is pressed between the bottom surface of the groove and the flexible graphite composite gasket.

[0008] Preferably, the vertical baffle is positioned above the starting end of the inclined guide plate; the level detection device is installed downstream of the vertical baffle.

[0009] Preferably, a connecting frame is provided between the mounting plate and the outer wall of the vertical section, and the connecting frame, the mounting plate, and the outer wall of the vertical section together form a triangular support structure.

[0010] Preferably, the angle between the axis of the short tube and the downward tilt of the horizontal plane is 15° to 30°.

[0011] Preferably, the level detection device is a radar level gauge or an ultrasonic level gauge.

[0012] Preferably, the end cap and the drum body are connected by a flange using high-strength bolts evenly distributed around the circumference.

[0013] Preferably, the blowpipe is fixedly connected to the outer end of the short pipe via a flange connection structure.

[0014] Preferably, the short pipe has a double-layer jacket structure, with a cooling medium inlet and outlet on its outer wall; a fire-resistant and heat-insulating bushing is embedded inside the round hole.

[0015] Preferably, a first heat insulation pad is provided between the mounting plate and the outer wall of the vertical section; a second heat insulation pad is provided between the mounting plate and the mounting base of the high-frequency air cannon.

[0016] Compared with the traditional structure, the beneficial effects of this utility model are: This invention physically optimizes material flow and prevents slag spraying and blockage by using a "vertical baffle buffer + inclined guide plate flow stabilization" anti-blocking component. Combined with a "level detection + high-frequency air cannon" unblocking component, it achieves automatic, precise, and rapid removal of initial accumulation, forming an intelligent anti-blocking system that prioritizes prevention and supplements it with removal.

[0017] By protecting the jetting pipeline with a "jacketed cooling short pipe + fire-resistant heat insulation bushing" and protecting the high-frequency air cannon body with a double heat insulation design of "first and second heat insulation pads", the industry problem of easy failure of the core components of the blockage removal function under high temperature environment is effectively solved, ensuring the long-term reliability of the blockage removal function.

[0018] The end seal adopts a combination structure of "convex and concave flange + flexible graphite composite gasket + L-shaped metal protective ring". The L-shaped metal protective ring effectively resists fretting wear, the heat dissipation fins reduce the working temperature of the seal, and the flexible graphite composite gasket ensures the sealing effect, greatly extending the overall seal life.

[0019] The inclined guide vane is lined with a ceramic wear-resistant liner on the slag-receiving surface, which greatly improves its service life. The feed pipe adopts a segmented flange connection, and the internal anti-clogging components and ceramic wear-resistant liners are removable, which greatly reduces maintenance costs and downtime.

[0020] The high-frequency air cannon is stably fixed by a triangular support structure. The spray direction has been optimized to maximize the unblocking force. All components of the entire device work together to ensure the long-term, stable and efficient operation of the cold slag machine feeding system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of the high-frequency air cannon of this utility model; Figure 3 This is a schematic diagram of the end sealing assembly structure of this utility model; In the diagram: 1. Feed pipe assembly, 11. Vertical section, 12. Inclined section, 2. Unblocking assembly, 21. High-frequency air cannon, 22. Mounting plate, 23. Connecting frame, 24. Blow pipe, 25. Short pipe, 26. Level detection device, 27. First heat insulation pad, 28. Second heat insulation pad, 3. Anti-blocking assembly, 31. Inclined guide plate, 32. Vertical baffle, 33. Ceramic wear-resistant liner, 4. End sealing assembly, 41. Drum body, 42. End cap, 43. Heat dissipation fins, 44. Groove, 45. Protrusion, 46. L-shaped metal protective ring, 47. Flexible graphite composite gasket. Detailed Implementation

[0022] The present invention will be further described below.

[0023] See attached document Figure 1-3 A clog-resistant cold slag machine feeding device includes a feed pipe assembly 1, a blockage-clearing assembly 2, an anti-blockage assembly 3, and an end sealing assembly 4. The feed pipe assembly 1 includes a vertical section 11 and an inclined section 12. The outlet end of the vertical section 11 and the inlet end of the inclined section 12 are detachably fixedly connected by a flange connection structure. This segmented design facilitates the inspection and replacement of internal components. The anti-blocking component 3 is located in the inner cavity of the starting part of the inclined section 12 and consists of a vertical baffle 32 and an inclined guide plate 31. The vertical baffle 32 stands above the starting end of the inclined guide plate 31 and is used to receive and buffer the slag falling from the vertical section 11. The inclined guide plate 31 guides the slag to slide into the drum at a stable flow rate. In order to cope with the erosion of high-speed and high-temperature slag, the slag-facing surface of the inclined guide plate 31 is fixed with a ceramic wear-resistant liner 33 through a detachable connection structure. The unblocking assembly 2 includes a high-frequency air cannon 21 and a level detection device 26. The high-frequency air cannon 21 is fixed to the outer wall of the vertical section 11 by a mounting plate 22. To ensure the reliability of the unblocking system at high temperatures, this utility model is equipped with multiple heat insulation protections: First, a circular hole is opened on the pipe wall of the vertical section 11, and a fire-resistant heat insulation bushing is embedded inside the circular hole; Second, the short pipe 25 welded to the circular hole is designed as a double-layer jacket structure, and its outer wall is provided with a cooling medium inlet and outlet, which can be circulated with compressed air or water for continuous cooling; Finally, a first heat insulation pad 27 is provided between the mounting plate 22 and the outer wall of the vertical section 11, and a second heat insulation pad 28 is provided between the mounting plate 22 and the mounting base of the high-frequency air cannon 21; The spray pipe 24 of the high-frequency air cannon 21 extends into the circular hole through this cooling short pipe 25, and its outlet faces the starting end of the inclined guide plate 31 at the optimal angle, that is, the area monitored by the level detection device 26. The level detection device 26 is installed on the outer wall of the inclined section 12, and its installation position corresponds to the downstream of the vertical baffle 32. Its detection direction is precisely aligned with the working surface of the starting end of the inclined guide plate 31. It is used to monitor the material accumulation status of the easily blocked area in real time, and is connected to the high-frequency air cannon 21 to realize automatic monitoring and clearing of blockages.

[0024] The end sealing assembly 4 includes an end cap 42 and a roller body 41. One side of the end cap 42 is provided with heat dissipation fins 43 to enhance heat dissipation, and the other side is provided with a groove 44. The end face of the roller body 41 is provided with a protrusion 45 that cooperates with the groove 44. A flexible graphite composite gasket 47 is pressed between the groove 44 and the protrusion 45. An L-shaped metal protective ring 46 is embedded in the inner ring of the flexible graphite composite gasket 47. The radial vertical edge of the L-shaped metal protective ring 46 is in contact with the radial inner wall of the groove 44, and its axial bottom edge is pressed between the bottom surface of the groove 44 and the flexible graphite composite gasket 47.

[0025] In this preferred embodiment, the vertical baffle 32 is disposed above the starting end of the inclined guide plate 31; the installation position of the level detection device 26 corresponds to the downstream of the vertical baffle 32.

[0026] In this preferred embodiment, a connecting frame 23 is provided between the mounting plate 22 and the outer wall of the vertical section 11. The connecting frame 23, the mounting plate 22, and the outer wall of the vertical section 11 together form a triangular support structure to ensure that the high-frequency air cannon 21 operates without vibration.

[0027] In this preferred embodiment, the angle between the axis of the short tube 25 and the downward tilt of the horizontal plane is 15° to 30°.

[0028] In this preferred embodiment, the level detection device 26 is a radar level gauge or an ultrasonic level gauge.

[0029] In this preferred embodiment, the end cap 42 and the drum body 41 are connected by a flange using high-strength bolts evenly distributed around the circumference.

[0030] In this preferred embodiment, the blow pipe 24 is fixedly connected to the outer end of the short pipe 25 through a flange connection structure.

[0031] In practice, high-temperature slag falls through the upper vertical section 11, is buffered after impacting the vertical baffle 32, and then smoothly slides into the slag cooler drum evenly along the inclined guide plate 31 covered with ceramic wear-resistant lining 33. If material accumulates at the beginning of the inclined guide plate 31 due to stickiness or other reasons, the level detection device 26 will immediately detect it and send a signal to trigger the high-frequency air cannon 21; the high-pressure airflow passes through the blowpipe 24 and the cooling short pipe 25, impacting the blockage pile at the optimal angle, quickly dispersing it and restoring flow. Throughout the process, the end sealing assembly 4 maintains an effective seal with the assistance of the heat dissipation fins 43, while the unblocking assembly 2 ensures long-term stable operation in high-temperature environments through jacket cooling and a double heat insulation structure.

[0032] The above embodiments of this utility model are merely examples to clearly illustrate this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent technical solutions also fall within the scope of this utility model, and the patent protection scope of this utility model should be defined by each claim.

Claims

1. A clog-resistant cold slag mill feeding device, comprising a feed pipe assembly (1), a blockage-clearing assembly (2), an anti-blockage assembly (3), and an end sealing assembly (4), characterized in that: The feed pipe assembly (1) includes a vertical section (11) and an inclined section (12), and the outlet end of the vertical section (11) and the inlet end of the inclined section (12) are detachably fixedly connected by a flange connection structure. The anti-blocking component (3) is disposed in the inner cavity of the inclined section (12). The anti-blocking component (3) includes a vertical baffle (32) and an inclined guide plate (31). The vertical baffle (32) is used to receive slag from the vertical section (11). The inclined guide plate (31) is used to guide the slag to flow towards the drum. The slag-facing surface of the inclined guide plate (31) is provided with a ceramic wear-resistant lining plate (33). The unblocking assembly (2) includes a high-frequency air cannon (21) and a level detection device (26). The high-frequency air cannon (21) is fixed to the outer wall of the vertical section (11) by a mounting plate (22). A circular hole is opened on the pipe wall of the vertical section (11), and an inclined short pipe (25) is welded to the outer wall at the circular hole. The axis of the short pipe (25) is inclined downward with respect to the horizontal plane. The spray pipe (24) of the high-frequency air cannon (21) extends into the circular hole through the inclined short pipe (25), and its outlet direction is towards the starting end of the inclined guide plate (31). The level detection device (26) is set on the outer wall of the inclined section (12), and its detection direction is towards the starting end of the inclined guide plate (31). The level detection device (26) is signal connected to the high-frequency air cannon (21). The end sealing assembly (4) includes an end cap (42) and a roller body (41). The end cap (42) has heat dissipation fins (43) on one side and a groove (44) on the other side. The end face of the roller body (41) has a protrusion (45) that cooperates with the groove (44). A flexible graphite composite gasket (47) is pressed between the groove (44) and the protrusion (45). An L-shaped metal protective ring (46) is embedded in the inner ring of the flexible graphite composite gasket (47). The radial vertical edge of the L-shaped metal protective ring (46) is in contact with the radial inner wall of the groove (44), and its axial bottom edge is pressed between the bottom surface of the groove (44) and the flexible graphite composite gasket (47).

2. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The vertical baffle (32) is positioned above the starting end of the inclined guide plate (31); the installation position of the level detection device (26) corresponds to the downstream of the vertical baffle (32).

3. The anti-clogging cold slag machine feeding device according to claim 1, characterized in that: A connecting frame (23) is provided between the mounting plate (22) and the outer wall of the vertical section (11). The connecting frame (23), the mounting plate (22), and the outer wall of the vertical section (11) together form a triangular support structure.

4. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The angle between the axis of the short tube (25) and the horizontal plane is 15° to 30°.

5. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The level detection device (26) is a radar level gauge or an ultrasonic level gauge.

6. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The end cap (42) and the drum body (41) are connected by flanges through circumferentially distributed high-strength bolts.

7. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The blow pipe (24) is fixedly connected to the outer end of the short pipe (25) through a flange connection structure.

8. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: The short pipe (25) has a double-layer jacket structure, with a cooling medium inlet and outlet on its outer wall; a fire-resistant and heat-insulating bushing is embedded in the inner side of the round hole.

9. The anti-clogging cold slag mill feeding device according to claim 1, characterized in that: A first heat insulation pad (27) is provided between the mounting plate (22) and the outer wall of the vertical section (11); a second heat insulation pad (28) is provided between the mounting plate (22) and the mounting base of the high-frequency air cannon (21).

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