Rotary kiln flue gas pipeline structure and surface air cooler

Abstract

The utility model discloses a rotary kiln flue gas pipeline structure and a surface air cooler, and relates to the technical field of rotary kiln metallurgy solid waste, the rotary kiln flue gas pipeline structure comprises a platform structure, a flue structure and an isolation baffle structure, the flue structure comprises a bypass flue and a heat dissipation pipe, the bypass flue is arranged on the platform structure, and the heat dissipation pipe is arranged on the platform structure. The heat dissipation pipe is arranged in the bypass flue, the two ends of the heat dissipation pipe are both communicated with an inner cavity of the bypass flue, the isolation baffle structure comprises a movable end and a driving part, and the movable end is arranged in the middle position, corresponding to the two ends of the heat dissipation pipe, of the bypass flue; according to the technical scheme, the baffle piece can be remotely operated to ascend and descend, meanwhile, the passing space of the platform is reserved, angle steel is welded to the two sides of the baffle piece, flat steel is welded to the two sides of the strip-shaped hole, rainwater can be prevented from directly or indirectly entering the bypass flue, and the convenience, safety and stability of engineering operation can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln metallurgical solid waste technology, and in particular to a rotary kiln flue gas pipeline structure and surface cooler. Background Technology

[0002] In recent years, the use of rotary kilns to treat zinc-containing dust and sludge has become a domestic trend in the treatment of zinc-containing dust and sludge in the metallurgical solid waste sector. Rotary kiln production lines for treating zinc-containing dust are now a standard configuration for large steel plants, a consensus within the industry, and strongly support the stable and healthy development of steel enterprises.

[0003] Flue gas surface coolers play a crucial role in regulating flue gas temperature and protecting baghouse dust collectors in metallurgical solid waste processes. They are an indispensable flue gas cooling device in rotary kiln metallurgical processes. However, in practical applications, due to their simple structure, the surface coolers currently suffer from low levels of rational design and automation. Bypass gate valves are often manually adjusted temporarily, which is inefficient and leads to untimely flue gas regulation, frequently causing the inlet flue gas temperature to exceed the limit, thus affecting the normal operation of the baghouse dust collector. Furthermore, the lack of rainproof design at the gate valve opening allows rainwater to mix into the flue gas, increasing its moisture content and raising the risk of bag clogging. Utility Model Content

[0004] The main purpose of this utility model is to propose a rotary kiln flue gas pipeline structure and surface cooler, which aims to solve the problems of low efficiency and untimely flue gas regulation of traditional gate valve regulation methods, which often lead to excessive flue gas temperature at the inlet of the bag filter, thus affecting the normal operation of the bag filter.

[0005] To achieve the above objectives, the rotary kiln flue gas duct structure proposed in this utility model includes:

[0006] Platform structure;

[0007] A flue structure includes a bypass flue and a heat dissipation pipe. The bypass flue is disposed on the platform structure, and the heat dissipation pipe is disposed in the bypass flue, with both ends of the heat dissipation pipe communicating with the inner cavity of the bypass flue; and...

[0008] The isolation baffle structure includes a movable end and a driving component. The movable end is located at the middle position of the bypass flue corresponding to the two ends of the heat dissipation pipe, and the movable end has a vertical travel stroke. The driving component is installed on the platform structure and connected to the movable end to drive the movable end to move in the vertical direction.

[0009] In one embodiment, the bypass flue has a strip-shaped hole at the middle position corresponding to both ends of the heat dissipation pipe;

[0010] The movable end is configured as a baffle, which is slidably mounted on the inner wall of the strip hole in the vertical direction.

[0011] In one embodiment, the platform structure is provided with clearance holes;

[0012] The drive unit is installed on the platform structure at a position corresponding to the lower part of the bypass flue, and the drive unit is connected to the baffle member through the clearance hole to drive the baffle member to move in the vertical direction.

[0013] In one embodiment, a ring of flat steel is provided at the outer edge of the strip-shaped hole corresponding to the bypass flue; and / or,

[0014] The baffle is provided with a ring of angle steel near its upper end, corresponding to the flat steel.

[0015] In one embodiment, a convex shaft portion is provided on one side of the upper end of the baffle member;

[0016] The driving component includes:

[0017] The drive unit is mounted on a beam structure of the platform structure corresponding to the bypass flue below, and has an output shaft that rotates along a horizontal axis;

[0018] A turntable component, mounted on the output shaft of the drive device, has a connecting shaft located on its end face away from the drive device, near its arc-shaped sidewall; and...

[0019] The connecting rod has one end rotatably connected to the connecting shaft, and the other end extends from the clearance hole and is rotatably connected to the convex shaft.

[0020] In one embodiment, the connecting rod is provided with a mounting portion;

[0021] A water-blocking part is provided at the upper edge of the clearance hole, and a rainproof cloth is provided between the water-blocking part and the mounting part.

[0022] In one embodiment, a temperature sensor is provided in the bypass flue, and a control element is provided on the platform structure. Both the temperature sensor and the drive device are connected to the control element.

[0023] In one embodiment, the heat pipe is configured in an inverted V shape.

[0024] In one embodiment, the flat steel is welded to the edge of the slot; and / or,

[0025] The angle steel is welded to the side wall of the baffle.

[0026] This utility model also includes a surface cooler, which includes a rotary kiln flue gas duct structure, the rotary kiln flue gas duct structure comprising:

[0027] Platform structure;

[0028] A flue structure includes a bypass flue and a heat dissipation pipe. The bypass flue is disposed on the platform structure, and the heat dissipation pipe is disposed in the bypass flue, with both ends of the heat dissipation pipe communicating with the inner cavity of the bypass flue; and...

[0029] The isolation baffle structure includes a movable end and a driving component. The movable end is located at the middle position of the bypass flue corresponding to the two ends of the heat dissipation pipe, and the movable end has a vertical travel stroke. The driving component is installed on the platform structure and connected to the movable end to drive the movable end to move in the vertical direction.

[0030] In this invention, the device allows for remote operation of the baffle plate's lifting and lowering while maintaining platform passage space. The motor and cable are positioned on the steel beam below the platform to prevent damage from the high-temperature heat dissipation pipes. Angle steel is welded to both sides of the baffle plate, and flat steel is welded to both sides of the strip-shaped hole to prevent rainwater from directly or indirectly entering the bypass flue, thus avoiding increased flue gas humidity and potential bag clogging in the bag filter. This improves the ease of operation, safety, and stability of the project. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the overall structure of an embodiment of the rotary kiln flue gas duct structure provided by this utility model;

[0033] Figure 2 for Figure 1 A schematic diagram of the AA section structure of the rotary kiln flue gas duct provided in the document;

[0034] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0035] Explanation of icon numbers:

[0036] 100. Rotary kiln flue gas duct structure; 1. Platform structure; 11. Clearance hole; 2. Flue structure; 21. Bypass flue; 211. Strip hole; 212. Flat steel; 22. Heat dissipation pipe; 3. Isolation baffle structure; 31. Baffle component; 311. Angle steel; 312. Convex shaft part; 32. Drive component; 321. Drive device; 322. Turntable component; 3221. Connecting shaft; 323. Connecting rod; 3231. Mounting part; 4. Water blocking part; 5. Waterproof cloth; 6. Temperature sensor; 7. Control element.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] 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 scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] In recent years, the use of rotary kilns to treat zinc-containing dust and sludge has become a domestic trend in the treatment of zinc-containing dust and sludge in the metallurgical solid waste sector. Rotary kiln production lines for treating zinc-containing dust are now a standard configuration for large steel plants, a consensus within the industry, and strongly support the stable and healthy development of steel enterprises.

[0042] Flue gas surface coolers play a crucial role in regulating flue gas temperature and protecting baghouse dust collectors in metallurgical solid waste processes. They are an indispensable flue gas cooling device in rotary kiln metallurgical processes. However, in practical applications, due to their simple structure, the surface coolers currently suffer from low levels of rational design and automation. Bypass gate valves are often manually adjusted temporarily, which is inefficient and leads to untimely flue gas regulation, frequently causing the inlet flue gas temperature to exceed the limit, thus affecting the normal operation of the baghouse dust collector. Furthermore, the lack of rainproof design at the gate valve opening allows rainwater to mix into the flue gas, increasing its moisture content and raising the risk of bag clogging.

[0043] This utility model proposes a rotary kiln flue gas duct structure 100 to solve the above problems.

[0044] Please see Figures 1 to 2In one embodiment of this utility model, a novel rotary kiln flue gas duct structure 100 is proposed. Rotary kilns for treating zinc-containing dust are already a standard configuration in large steel plants, a consensus within the industry. One end of the flue gas duct connects to the furnace body, and the other end connects to corresponding flue gas treatment equipment. The flue gas needs to be treated before it can be discharged. Traditional flue gas treatment devices are mostly protective bag filters. However, if high-temperature flue gas is directly discharged into the protective bag filter for treatment, its high temperature can easily cause the inlet flue gas temperature to exceed the limit, preventing the bag filter from functioning properly. Typically, a cooling pipe needs to be installed in the flue gas duct to cool the flue gas. The traditional solution is to connect the cooling pipe in parallel with the flue gas duct and then manually cut off the flow of the flue gas duct using a baffle plate, allowing the flue gas to enter the cooling pipe for cooling. Because the flue gas duct of a rotary kiln is large, traditional valve structures are difficult to meet the requirements. Isolating flue gas ducts with partitions is a common method of isolation. However, this method requires significant manual labor and is not convenient to operate, often resulting in delayed adjustments and shutdowns. In such cases, some high-temperature flue gas enters the baghouse dust collector, affecting the normal operation of the dust collector itself. This embodiment addresses these issues. Specifically, in actual use, one end of the bypass flue 21 in flue structure 2 is connected to the boiler exhaust pipe, and the other end is connected to the baghouse dust collector. A heat dissipation pipe 22 is installed above the bypass flue 21, with both ends connected to the inner cavity of the bypass flue 21, forming a parallel exhaust pipeline with the bypass flue 21. The isolation baffle structure 3 is used to control the opening and closing of the bypass flue 21. The isolation baffle structure 3 includes a driving component 32 and a movable end. The movable end is installed at the middle position of the bypass flue 21 corresponding to the two ends of the heat dissipation pipe 22. It is driven by the driving component 32 on the platform structure 1. In actual operation, if the flue gas temperature is low, the movable end is located outside the inner cavity of the bypass flue 21 and will not affect the flow of flue gas inside the bypass flue 21. When the flue gas temperature inside the bypass flue 21 is high and exceeds a predetermined value, the driving component 32 will drive the movable end to move downward, thereby blocking the inner cavity of the bypass flue 21 through the movable end. At this time, the high-temperature flue gas can only flow through the heat dissipation pipe 22 above. The flue gas discharged from the boiler flue pipe is cooled by the heat dissipation pipe 22 before being discharged to the bag filter for treatment, thereby avoiding the impact of high-temperature flue gas on the bag filter. In this embodiment, the driving component 32 drives the movable end to perform actions, thereby achieving automated control and avoiding various unstable factors in the manual adjustment process, thus improving the safety and stability of the entire flue structure 2 during the smoke exhaust process.

[0045] Specifically, the movable end is configured as a baffle 31. A strip-shaped hole 211 is provided in the middle position of the bypass flue 21 corresponding to the two ends of the heat dissipation pipe 22. The baffle 31 is slidably installed in the strip-shaped hole 211 in the vertical direction. It is conceivable that a corresponding guide structure can be provided between the strip-shaped hole 211 and the baffle 31 to guide the baffle 31 during movement, and at the same time, to make the side wall of the baffle 31 contact the inner wall of the strip-shaped hole 211 as much as possible, thereby minimizing the overflow of flue gas, and also reducing the inflow of external rainwater into the bypass flue 21 to a certain extent.

[0046] In order not to affect the passage space of the platform structure 1, and to avoid the driving component 32 being affected by the high-temperature flue gas and the corresponding pipeline structure, in this embodiment, the driving component 32 is installed on the platform structure 1 below the bypass flue 21, and the driving part of the driving component 32 is kept away from the high-temperature structure above. Specifically, the driving component 32 is installed on the steel beam of the platform structure 1, and one end of the driving component 32 passes through the avoidance hole 11 on the platform structure 1 and is connected to the baffle 31, thereby driving the baffle 31 to move in the vertical direction to realize the opening and closing of the bypass flue 21.

[0047] Considering that the bypass flue 21 is actually located outdoors during use, rainwater may flow into the bypass flue 21 through the gap between the strip hole 211 and the baffle 31 during rainy days, resulting in excessive moisture inside the flue and causing the bag filter to become clogged. In this embodiment, a ring of flat steel 212 is provided at the outer edge of the strip hole 211 corresponding to the outside of the bypass flue 21. The flat steel 212 has a certain vertical height, which can effectively prevent rainwater from entering the bypass flue 21. Furthermore, a ring of angle steel 311 is provided on the baffle 31 near its upper end, corresponding to the flat steel 212. When cooling the high-temperature flue gas, the baffle 31 moves downward, and the ring of angle steel 311 covers the flat steel 212, thereby further improving the waterproofness of the strip hole 211.

[0048] The driving component 32 specifically includes a driving device 321, a turntable 322, and a connecting rod 323. The driving device 321 is positioned away from the bypass flue 21 and the heat dissipation pipe 22, and is specifically installed on the beam structure of the platform structure 1 corresponding to the area below the bypass flue 21. The driving device 321 has an output shaft that rotates along a horizontal axis. When operating, it drives the turntable 322 on its output shaft to rotate. The turntable 322, through the connecting shaft 3221, drives the connecting rod 323 to swing in a vertical plane. One end of the connecting rod 323 is connected to the baffle 31 via a protruding shaft 312. During the swinging process of the connecting rod 323, it drives the baffle 31 to move vertically, thereby achieving the closing and opening of the bypass flue 21 by the baffle 31.

[0049] One end of the connecting rod 323 is located inside the platform structure 1, and the other end is connected to the baffle 31 on the outer side of the platform structure. It is conceivable that the platform structure 1 has a clearance hole 11 for the connecting rod 323 to move and make way. This clearance hole 11 is also susceptible to rainwater entering the bypass flue 21 during rainy weather. Therefore, in this embodiment, a water-blocking portion 4 is provided at the clearance hole 11, and a mounting portion 3231 is provided on the connecting rod 323. A waterproof cloth 5 is provided between the water-blocking portion 4 and the mounting portion 3231. During rain, this effectively shields the clearance hole 11. Furthermore, the waterproof cloth 5 is made of flexible material and does not affect the movement of the connecting rod 323.

[0050] Furthermore, it is conceivable that the aforementioned driving component 32 structure can be configured as two, which can be respectively installed on the horizontal sides of the baffle component 31. The two driving components 32 operate simultaneously, jointly driving the baffle component 31 to move in the vertical direction, thereby balancing the relevant forces received by the baffle component 31 in the horizontal direction, making the movement of the baffle component 31 smoother and more stable.

[0051] To achieve automatic control of the baffle 31, in this embodiment, an inductive control structure is also provided in the rotary kiln flue gas duct structure 100. This inductive control structure includes a temperature sensor 6 and a control element 7. The temperature sensor is primarily used to obtain the actual temperature inside the bypass flue 21. During installation, it is mounted on the inner wall of the bypass flue 21 to ensure the accuracy of the flue gas temperature inside the bypass flue 21. As for the control element 7, to avoid the influence of high ambient temperatures on its control process, in this embodiment, the control element 7 is installed on the steel beam structure below the platform structure 1. During actual operation, both the temperature sensor 6 and the drive device 321 are connected to the control element 7. When the flue gas temperature inside the bypass flue 21 is too high, the control element 7 can directly control the drive device 321 to operate, thereby achieving automatic control of the opening and closing of the entire bypass flue 21. This improves the automation level of the entire rotary kiln flue gas duct structure 100, facilitates management and operation, and effectively avoids some unstable factors in the manual control process.

[0052] It is conceivable that the drive device 321 may be equipped with a motor structure or other rotary drive components, and can be configured according to actual production data. No specific restrictions are imposed in this solution.

[0053] In this embodiment, the heat dissipation pipe 22 is shaped as an inverted V. Since the heat dissipation pipe 22 is connected in parallel to the bypass flue 21, its main purpose is to cool the high-temperature flue gas. It is conceivable that the specific shape of the heat dissipation pipe 22, in addition to the above shape, can also be set as a C-shape or other irregularly shaped bent pipes, etc., which can be set according to the actual installation and actual production conditions.

[0054] In addition, the flat steel 212 and the angle steel 311 are respectively fixed to the edge of the strip hole 211 and the side wall of the baffle 31 by welding.

[0055] This solution also discloses a surface cooler, which includes a rotary kiln flue gas duct structure 100. The specific details of the rotary kiln flue gas duct structure 100 are as described in the above embodiments. Since the rotary kiln flue gas duct structure 100 adopts all the technical solutions in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be elaborated here.

[0056] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotary kiln flue gas duct structure, characterized in that, include: Platform structure; A flue structure includes a bypass flue and a heat dissipation pipe. The bypass flue is disposed on the platform structure, and the heat dissipation pipe is disposed in the bypass flue, with both ends of the heat dissipation pipe communicating with the inner cavity of the bypass flue; and... The isolation baffle structure includes a movable end and a driving component. The movable end is located at the middle position of the bypass flue corresponding to the two ends of the heat dissipation pipe, and the movable end has a vertical travel stroke. The driving component is installed on the platform structure and connected to the movable end to drive the movable end to move in the vertical direction.

2. The rotary kiln flue gas duct structure as described in claim 1, characterized in that, The bypass flue has a strip-shaped hole at the middle position of both ends of the heat dissipation pipe; The movable end is configured as a baffle, which is slidably mounted on the inner wall of the strip hole in the vertical direction.

3. The rotary kiln flue gas duct structure as described in claim 2, characterized in that, The platform structure is provided with clearance holes; The drive unit is installed on the platform structure at a position corresponding to the lower part of the bypass flue, and the drive unit is connected to the baffle member through the clearance hole to drive the baffle member to move in the vertical direction.

4. The rotary kiln flue gas duct structure as described in claim 2, characterized in that, The strip-shaped hole is provided with a ring of flat steel at the outer edge of the bypass flue; and / or, The baffle is provided with a ring of angle steel near its upper end, corresponding to the flat steel.

5. The rotary kiln flue gas duct structure as described in claim 3, characterized in that, The upper end of the baffle is provided with a convex shaft portion on one side; The driving component includes: The drive unit is mounted on a beam structure of the platform structure corresponding to the bypass flue below, and has an output shaft that rotates along a horizontal axis; A turntable component, mounted on the output shaft of the drive device, has a connecting shaft located on its end face away from the drive device, near its arc-shaped sidewall; and... The connecting rod has one end rotatably connected to the connecting shaft, and the other end extends from the clearance hole and is rotatably connected to the convex shaft.

6. The rotary kiln flue gas duct structure as described in claim 5, characterized in that, The connecting rod is provided with a mounting part; A water-blocking part is provided at the upper edge of the clearance hole, and a rainproof cloth is provided between the water-blocking part and the mounting part.

7. The rotary kiln flue gas duct structure as described in claim 5, characterized in that, A temperature sensor is installed inside the bypass flue, and a control element is installed on the platform structure. Both the temperature sensor and the drive device are connected to the control element.

8. The rotary kiln flue gas duct structure as described in claim 4, characterized in that, The heat pipe is designed in an inverted V shape.

9. The rotary kiln flue gas duct structure as described in claim 8, characterized in that, The flat steel is welded to the edge of the slot; and / or, The angle steel is welded to the side wall of the baffle.

10. A surface cooler, characterized in that, It includes the rotary kiln flue gas duct structure as described in any one of claims 1-9.

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