Return material sealing mechanism of slag cooler

Abstract

The utility model discloses a slag cooler material returning sealing mechanism, which relates to the technical field of slag cooler material returning, and comprises a material returning pipeline, a material discharging cylinder and a first cylinder body labyrinth ring, the material discharging cylinder is welded at the bottom end of the outer wall of the material returning pipeline, one side of the outer wall of the material discharging cylinder is sleeved with the first cylinder body labyrinth ring, and the middle part of the outer wall of the material discharging cylinder is sleeved with a second cylinder body labyrinth ring. When the return material sealing mechanism of the slag cooler is used, the sealing reliability is remarkably improved through structure optimization and multi-stage cooperation, continuous return of materials is ensured through the return material recoverer blades, then the ash recovery efficiency is improved, the feeding hopper is limited through the limiting mechanism to prevent the feeding hopper from rotating randomly, and the sealing reliability is improved. And then a worker can conveniently and rapidly connect the feeding hopper with the top of the material returning pipeline in a butt joint mode, time and energy are saved, follow-up disassembly, maintenance and cleaning of the feeding hopper are facilitated, and therefore when the slag cooler material returning sealing mechanism is used, the effects of improving sealing reliability and ash recycling efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of cold slag machine return material technology, specifically to a cold slag machine return material sealing mechanism. Background Technology

[0002] The slag cooler is a key component of a circulating fluidized bed boiler system, primarily used for cooling, conveying, and recovering waste heat from high-temperature slag. Its core function is to reduce slag temperature through physical cooling and heat exchange, while simultaneously maintaining stable boiler bed pressure and recovering heat energy. Slag cooler return refers to the process where slag or other solid materials cooled by the slag cooler in a circulating fluidized bed boiler or similar equipment are returned to the furnace or other related equipment via a specific device or system to continue participating in combustion or other processes. The slag cooler return sealing mechanism is a crucial device for ensuring leak-free material handling during high-temperature slag processing, achieving closed-loop transmission and recovery of ash and slag through dynamic sealing and self-circulating return technology.

[0003] According to announcement number CN219797245U, a reversible slag inlet sealing device for a cold slag machine includes a housing, an internal cold slag roller, a support rod fixedly connected to the side surface of the housing, a slag inlet box fixedly connected to the end of the support rod away from the cold slag roller, and a slag inlet pipe fixedly connected inside the slag inlet box; a blower mechanism, including a box fixedly connected to the inner wall of the slag inlet box, and a blower fixedly connected inside the box; and a vibration mechanism including a spring fixedly connected to the slag inlet box, a movable rod fixedly connected to the end of the spring away from the slag inlet box, and the movable rod extending into the slag inlet pipe at the end of the movable rod away from the spring, a vibrating plate fixedly connected to the end of the movable rod away from the spring, and an inclined plate fixedly connected to the lower surface of the vibrating plate. This structure facilitates the flow of slag in the slag inlet pipe, thereby improving slag discharge efficiency.

[0004] The aforementioned patent only improves the sealing performance when the cold slag drum is connected to the slag inlet box by attaching the sealing ring to the cold slag drum. However, the vibration or radial runout generated when the drum rotates can cause the sealing ring to partially detach from the contact surface, forming a momentary leakage channel. This results in insufficient dynamic sealing reliability. Furthermore, the sealing ring is prone to hardening or creep under continuous high temperature, losing elastic contact pressure and causing the sealing interface to detach and fail, thus affecting the return material operation of the cold slag machine. Utility Model Content

[0005] The purpose of this invention is to provide a return material sealing mechanism for a cold slag machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cold slag machine return sealing mechanism, including a return pipe, a discharge cylinder, and a first cylinder labyrinth ring. The discharge cylinder is welded to the bottom of the outer wall of the return pipe. A first cylinder labyrinth ring is sleeved on one side of the outer wall of the discharge cylinder, and a second cylinder labyrinth ring is sleeved in the middle of the outer wall of the discharge cylinder. Both the first and second cylinder labyrinth rings are welded to the cylinder body, and they rotate relative to the discharge cylinder to form two sealing rings. An inlet for a slag return recovery device is opened in the middle of the inner wall of the discharge cylinder. The discharge cylinder is located near the slag discharge point. A return material recovery device blade is connected to one side of the inlet of the return material recovery device, and a return material recovery device shell is fitted onto the outer wall of the return material recovery device blade. The return material recovery device blade rotates with the cylinder. A No. 1 slag discharge pipe labyrinth ring is connected to one side of the outer wall of the return material recovery device blade, and a No. 2 slag discharge pipe labyrinth ring is provided on the other side of the outer wall of the return material recovery device blade. The inner walls of both the No. 1 and No. 2 slag discharge pipe labyrinth rings are connected to the outer wall of the discharge cylinder. The No. 2 slag discharge pipe labyrinth ring cooperates with the return material recovery device shell to form two labyrinth seals again to prevent fine dust from escaping.

[0007] Preferably, the first slag discharge pipe labyrinth ring and the second cylinder labyrinth ring cooperate to form a labyrinth seal to prevent material from escaping from the first two seals. The second cylinder labyrinth ring is connected to a mounting base.

[0008] Preferably, a first overflow baffle is welded to one side of the inner wall of the discharge cylinder, and a second overflow baffle is welded to the side of the inner wall of the discharge cylinder closest to the first overflow baffle.

[0009] Preferably, the outer shell of the return material recycling device has a roughly "Z" shaped cross-section, the first anti-overflow baffle is inclined, and the second anti-overflow baffle is arc-shaped.

[0010] Preferably, a limiting mechanism is provided at the top of the return pipe, and the limiting mechanism includes a fixed plate, a limiting plate, a feed hopper, a limiting pin, a threaded pin and an extension plate. The fixed plate is welded to the top of the outer wall of the return pipe, and the limiting plate is slidably connected to the top of the outer wall of the fixed plate.

[0011] Preferably, a feed hopper is welded to the top of the outer wall of the limiting disk, a limiting pin is welded to the bottom of the limiting disk, and a threaded pin is threadedly connected inside the limiting disk.

[0012] Preferably, the limiting pin and the threaded pin are distributed at equal angles, the fixed plate has a threaded hole corresponding to the limiting pin, and the limiting plate has a threaded hole corresponding to the threaded pin.

[0013] Preferably, an extension plate is welded to the middle of the outer wall of the fixed disk, and the extension plate is distributed in a "+" shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When the cold slag machine return sealing mechanism is used, the sealing reliability is significantly improved through structural optimization and multi-level coordination. The return material recovery blades ensure continuous material return, thereby improving the ash and slag recovery efficiency. The limiting mechanism limits the feed hopper to prevent it from rotating arbitrarily, which makes it convenient for workers to quickly connect the feed hopper to the top of the return pipe, saving time and effort. It also facilitates the subsequent disassembly, maintenance and cleaning of the feed hopper. Thus, when the cold slag machine return sealing mechanism is used, it plays a role in improving the sealing reliability and ash and slag recovery efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a side view of the three-dimensional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the inlet of the slag return and recovery device of this utility model;

[0019] Figure 5 This is a schematic diagram of the main sectional view of the discharge cylinder of this utility model;

[0020] Figure 6 This is a three-dimensional structural diagram of the feed hopper of this utility model;

[0021] Figure 7 This is a three-dimensional structural diagram of the limiting mechanism of this utility model.

[0022] In the diagram: 1. Return pipe; 2. Discharge cylinder; 3. No. 1 cylinder labyrinth ring; 4. No. 2 cylinder labyrinth ring; 5. Slag discharge pipe return material recovery device inlet; 6. Return material recovery device blades; 7. Return material recovery device shell; 8. No. 1 slag discharge pipe labyrinth ring; 9. No. 2 slag discharge pipe labyrinth ring; 10. No. 1 overflow prevention baffle; 11. No. 2 overflow prevention baffle; 12. Fixed base; 13. Limiting mechanism; 1301. Fixed plate; 1302. Limiting plate; 1303. Feed hopper; 1304. Limiting pin; 1305. Threaded pin; 1306. Extension plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-7 This utility model provides a technical solution: a cold slag machine return sealing mechanism, including a return pipe 1, a discharge cylinder 2, and a first cylinder labyrinth ring 3. The discharge cylinder 2 is welded to the bottom of the outer wall of the return pipe 1. A first cylinder labyrinth ring 3 is sleeved on one side of the outer wall of the discharge cylinder 2, and a second cylinder labyrinth ring 4 is sleeved in the middle of the outer wall of the discharge cylinder 2. Both the first cylinder labyrinth ring 3 and the second cylinder labyrinth ring 4 are welded to the cylinder body and rotate relative to the discharge cylinder 2 to form two sealing rings. A slag pipe return recovery device inlet 5 is opened in the middle of the inner wall of the discharge cylinder 2. A return recovery device blade 6 is connected to the side of the discharge cylinder 2 near the slag pipe return recovery device inlet 5. The outer wall of the blade 6 is fitted with a return material recovery device shell 7. The return material recovery device blade 6 rotates with the cylinder. One side of the outer wall of the return material recovery device blade 6 is connected to a first-stage slag discharge pipe labyrinth ring 8, and the other side of the outer wall of the return material recovery device blade 6 is provided with a second-stage slag discharge pipe labyrinth ring 9. The inner walls of both the first-stage and second-stage slag discharge pipe labyrinth rings are connected to the outer wall of the discharge cylinder 2. The second-stage slag discharge pipe labyrinth ring 9, together with the return material recovery device shell 7, forms two more labyrinth seals to prevent fine dust from escaping. The first-stage slag discharge pipe labyrinth ring 8, together with the second-stage cylinder labyrinth ring 4, forms a labyrinth seal to block material escaping from the first two seals. 4 is connected to a mounting base 12; a first overflow baffle 10 is welded to one side of the inner wall of the discharge cylinder 2, and a second overflow baffle 11 is welded to the side of the inner wall of the discharge cylinder 2 near the first overflow baffle 10; the cross-section of the outer shell 7 of the return material recovery device is roughly "Z" shaped, the first overflow baffle 10 is inclined, and the second overflow baffle 11 is arc-shaped; a limit mechanism 13 is provided at the top of the return material pipe 1, and the limit mechanism 13 includes a fixed plate 1301, a limit plate 1302, a feed hopper 1303, a limit pin 1304, a threaded pin 1305, and an extension plate 1306; a fixed plate 1 is welded to the top of the outer wall of the return material pipe 1. 301, and a limiting plate 1302 is slidably connected to the top of the outer wall of the fixed plate 1301; a feed hopper 1303 is welded to the top of the outer wall of the limiting plate 1302, a limiting pin 1304 is welded to the bottom of the limiting plate 1302, and a threaded pin 1305 is threadedly connected inside the limiting plate 1302; the limiting pin 1304 and the threaded pin 1305 are distributed at equal angles, the fixed plate 1301 has a threaded hole corresponding to the limiting pin 1304 inside, and the limiting plate 1302 has a threaded hole corresponding to the threaded pin 1305 inside; an extension plate 1306 is welded to the middle of the outer wall of the fixed plate 1301, and the extension plate 1306 is distributed in a "+" shape.

[0025] For specific implementation, please refer to Figures 1-4 , Figure 6 and Figure 7During the use of the cold slag machine return sealing mechanism, the extension plate 1306 facilitates the movement of the limiting plate 1302 by the staff until the bottom of the limiting plate 1302 is in contact with the fixed plate 1301. At this time, the limiting plate 1302 is inserted into the fixed plate 1301, thereby preventing the limiting plate 1302 from rotating at will and affecting the installation of the feed hopper 1303.

[0026] See Figure 6 and Figure 7 The threaded pin 1305 is rotated sequentially to pass through the fixed plate 1301 and connect with the limiting plate 1302, and then the limiting plate 1302 is fixed, so that the feed hopper 1303 is installed in the designated position. Thus, the limiting mechanism 13 facilitates the staff to quickly connect the feed hopper 1303 with the top of the return pipe 1, saving time and effort, and facilitating the subsequent disassembly, maintenance and cleaning of the feed hopper 1303.

[0027] See Figures 1-5 To prevent leakage during the return of material from the cold slag machine, the No. 1 cylinder labyrinth ring 3 and the No. 2 cylinder labyrinth ring 4 rotate together with the discharge cylinder 2 and rotate relative to the slag discharge pipe, forming two dynamic sealing interfaces as the most basic seal, and using the centrifugal force of rotation to reduce the escape of ash and slag.

[0028] The No. 1 slag pipe labyrinth ring 8 and the No. 2 cylinder labyrinth ring 4 form an interlaced labyrinth channel, which increases fluid resistance through a multi-stage tortuous path, intercepts ash and slag leaking from the first two seals, and allows ash and slag to be discharged directly.

[0029] The return material recovery blades 6 rotate with the cylinder, which can collect the material that escapes from the first three seals and reintroduce it into the slag pipe from the slag pipe return material recovery inlet 5, ensuring that the material is continuously returned to the inside of the slag pipe.

[0030] The No. 2 slag pipe labyrinth ring 9 and the return material recovery unit shell 7 form two labyrinth seals again. Designed for fine dust, the multi-level slit structure suppresses dust diffusion and prevents fine dust from overflowing.

[0031] Furthermore, the cooperation between the No. 1 overflow baffle 10 and the No. 2 overflow baffle 11 at this time prevents overflow when materials are returned, thereby optimizing the structure and multi-level collaboration, significantly improving sealing reliability and ash and slag recovery efficiency.

[0032] In summary, when using the cold slag machine return sealing mechanism, the discharge cylinder 2 is first fixed in a designated position by the fixed base 12. Then, the raw material is introduced into the return pipe 1 through the feed hopper 1303. After that, the raw material passes through the return pipe 1 to the discharge cylinder 2, and then the raw material is returned to the furnace from the discharge cylinder 2. This is existing technology and will not be elaborated further. The feed hopper 1303 is limited by the limiting mechanism 13 to prevent it from rotating arbitrarily, which makes it convenient for the staff to quickly connect the feed hopper 1303 to the top of the return pipe 1, saving time and effort, and facilitating the subsequent disassembly, maintenance and cleaning of the feed hopper 1303. Through structural optimization and multi-stage coordination, the sealing reliability is significantly improved, and the return recovery blades 6 ensure continuous material return, thereby improving the ash and slag recovery efficiency. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A return material sealing mechanism for a cold slag machine, comprising a return material pipe (1), a discharge cylinder (2), and a first cylinder labyrinth ring (3), wherein the discharge cylinder (2) is welded to the bottom of the outer wall of the return material pipe (1), characterized in that: A first cylinder labyrinth ring (3) is fitted onto one side of the outer wall of the discharge cylinder (2), and a second cylinder labyrinth ring (4) is fitted onto the middle of the outer wall of the discharge cylinder (2). Both the first cylinder labyrinth ring (3) and the second cylinder labyrinth ring (4) are welded to the cylinder body, and they rotate relative to the discharge cylinder (2) to form two sealing rings. An inlet (5) of the slag pipe return material recovery device is opened in the middle of the inner wall of the discharge cylinder (2). A return material recovery device blade (6) is connected to the side of the discharge cylinder (2) near the slag pipe return material recovery device inlet (5), and the return material recovery device blade (6) is located on the outside of the return material recovery device. The wall is fitted with a return material recovery device shell (7). The return material recovery device blades (6) rotate with the cylinder. A first slag discharge pipe labyrinth ring (8) is connected to one side of the outer wall of the return material recovery device blades (6), and a second slag discharge pipe labyrinth ring (9) is provided on the other side of the outer wall of the return material recovery device blades (6). The inner walls of the first slag discharge pipe labyrinth ring (8) and the second slag discharge pipe labyrinth ring (9) are connected to the outer wall of the discharge cylinder (2). The second slag discharge pipe labyrinth ring (9) and the return material recovery device shell (7) cooperate to form two labyrinth seals to prevent fine dust from overflowing.

2. The cold slag machine return sealing mechanism according to claim 1, characterized in that: The No. 1 slag pipe labyrinth ring (8) and the No. 2 cylinder labyrinth ring (4) cooperate to form a labyrinth seal, which is used to block the material from escaping from the first two seals. The No. 2 cylinder labyrinth ring (4) is connected to a mounting base (12).

3. The cold slag machine return sealing mechanism according to claim 2, characterized in that: A first overflow baffle (10) is welded to one side of the inner wall of the discharge cylinder (2), and a second overflow baffle (11) is welded to the side of the inner wall of the discharge cylinder (2) close to the first overflow baffle (10).

4. The cold slag machine return sealing mechanism according to claim 3, characterized in that: The outer shell (7) of the return material recycling device has a roughly "Z" shaped cross section, the first anti-overflow baffle (10) is inclined, and the second anti-overflow baffle (11) is arc-shaped.

5. The cold slag machine return sealing mechanism according to claim 1, characterized in that: The top of the return pipe (1) is provided with a limiting mechanism (13), and the limiting mechanism (13) includes a fixed plate (1301), a limiting plate (1302), a feed hopper (1303), a limiting pin (1304), a threaded pin (1305) and an extension plate (1306). The top of the outer wall of the return pipe (1) is welded with a fixed plate (1301), and the top of the outer wall of the fixed plate (1301) is slidably connected to the limiting plate (1302).

6. The cold slag machine return sealing mechanism according to claim 5, characterized in that: The top of the outer wall of the limiting plate (1302) is welded with a feeding hopper (1303), the bottom of the limiting plate (1302) is welded with a limiting pin (1304), and the inside of the limiting plate (1302) is threaded with a threaded pin (1305).

7. The cold slag machine return sealing mechanism according to claim 6, characterized in that: The limiting pin (1304) and the threaded pin (1305) are distributed at equal angles. The fixed plate (1301) has a threaded hole corresponding to the limiting pin (1304) inside, and the limiting plate (1302) has a threaded hole corresponding to the threaded pin (1305) inside.

8. The cold slag machine return sealing mechanism according to claim 7, characterized in that: An extension plate (1306) is welded to the middle of the outer wall of the fixed plate (1301), and the extension plate (1306) is distributed in a "+" shape.

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