A rotary kiln head exhaust device

Abstract

The utility model discloses a rotary kiln head exhaust device, including rotary kiln, kiln head cover, exhaust pipe, exhaust fan and baroceptor, install the connecting pipe on the exhaust fan, the connecting pipe outside rotatoryly connected with the shunt ring box, the shunt ring box inside is provided with inner ring and a plurality of partition board, the partition board installs between the inner ring with the shunt ring box, the inner ring rotatoryly connected in the connecting pipe outside, the connecting pipe one side is provided with the discharge port, the inner ring side wall is provided with a plurality of butt joint holes, through the cooperation of rotatable outer cup cover and filter cartridge, when collecting the pulverized coal, need not to suspend the rotary kiln and exhaust system operation, realized the continuous production, solved the problem of production interruption, reduced efficiency because of shutdown, simultaneously, utilize filter cartridge high -efficient interception to burn out the coal powder, reduced fuel waste, reduced production energy consumption and cost, and the demand of coal powder high -efficient interception and system continuous operation is also considered.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, specifically a rotary kiln head exhaust device. Background Technology

[0002] In rotary kiln production processes in industries such as cement and metallurgy, the kiln head exhaust system, as a core device for controlling kiln head pressure and discharging high-temperature flue gas, often faces the technical challenge of removing unburned pulverized coal with the airflow. Specifically, the rotary kiln head needs to maintain a slightly negative pressure environment to ensure thermal stability. When pulverized coal combustion is incomplete, a large amount of unburned pulverized coal will enter the exhaust system with the 300-500℃ high-temperature flue gas. Simultaneously, fluctuations in the kiln's thermal regime further exacerbate the entrainment of unburned pulverized coal by the airflow. This phenomenon not only causes serious fuel waste and significantly increases production energy consumption and costs but also adversely affects production efficiency. Currently, although some rotary kilns are equipped with filtration mechanisms in their exhaust systems to intercept and collect coal dust, the existing collection methods require centralized processing of the intercepted coal dust. During the processing, the operation of the rotary kiln and the exhaust system must be suspended, resulting in production interruption. This is not only cumbersome and time-consuming, but also reduces overall production efficiency due to unplanned shutdowns. It is difficult to adapt to the needs of continuous production in rotary kilns. Existing technologies have not yet formed a solution that can balance efficient coal dust interception with continuous system operation.

[0003] Therefore, this utility model provides a rotary kiln head exhaust device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rotary kiln head exhaust device to solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary kiln head exhaust device, comprising a rotary kiln, a kiln head hood, an exhaust pipe, an exhaust fan, and a pressure sensor. A connecting pipe is installed on the exhaust fan. A flow divider ring box is rotatably connected to the outside of the connecting pipe. An inner ring and several partition plates are provided inside the flow divider ring box. The partition plates are installed between the inner ring and the flow divider ring box. The inner ring is rotatably connected to the outside of the connecting pipe. A discharge port is provided on one side of the connecting pipe. Several docking holes are provided on the side wall of the inner ring, and these docking holes sequentially dock with the discharge port. Several through holes are provided at the bottom of the flow divider ring box. Several outer cup covers are provided at the bottom of the flow divider ring box. A filter cylinder is provided inside each outer cup cover, and the filter cylinder docks with the corresponding through holes. Several exhaust holes are provided at the bottom of each outer cup cover.

[0006] Preferably, a baffle is installed on one side of the connecting pipe, and an L-shaped conveying pipe is installed at the bottom of the baffle. Several outer cup covers are rotated sequentially to the top of the baffle, and the outer cup covers communicate with the internal space of the L-shaped conveying pipe through the exhaust hole.

[0007] Preferably, a drive motor is installed at the top of the connecting pipe, and a U-shaped drive frame is connected to the output end of the drive motor. The U-shaped drive frame is installed at the top of the diverter ring box.

[0008] Preferably, a retaining ring is installed on the outside of the filter cartridge, and the retaining ring abuts against the bottom of the flow divider ring box.

[0009] Preferably, a plurality of threaded rings are installed at the bottom of the flow divider ring box, the threaded rings corresponding to the positions of the through holes, and the outer cup cover is threadedly connected to the inner wall of the corresponding threaded ring.

[0010] Beneficial effects

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] (1) This utility model, through the cooperation of the rotatable outer cup cover and the filter cylinder, can collect coal powder without stopping the operation of the rotary kiln and the exhaust system, thus realizing continuous production and solving the problem of production interruption and efficiency reduction caused by shutdown; at the same time, the filter cylinder efficiently intercepts unburned coal powder, reducing fuel waste, reducing production energy consumption and cost, and taking into account the needs of efficient coal powder interception and continuous system operation.

[0013] (2) In this utility model, when the outer cup cover is rotated to the rear position corresponding to the discharge port, the outer cup cover can be disassembled, the filter cylinder can be taken out to transfer the collected coal powder, and the filter cylinder and the coal powder inside have sufficient time to cool down, so as to avoid high temperature affecting the removal of coal powder. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is the utility model Figure 1 A magnified view of the structure at point A in the middle;

[0016] Figure 3 This is a partial enlarged cross-sectional view of the present invention. Figure 1 ;

[0017] Figure 4 This is a partial enlarged cross-sectional view of the present invention. Figure 2 .

[0018] In the diagram: 1. Rotary kiln; 11. Kiln head hood; 12. Exhaust pipe; 13. Exhaust fan; 14. Pressure sensor; 2. Connecting pipe; 21. Discharge port; 22. Baffle; 23. L-shaped conveying pipe; 24. Drive motor; 25. U-shaped drive frame; 3. Diverter ring box; 31. Inner ring; 32. Docking hole; 33. Separator plate; 34. Through hole; 35. Threaded ring; 4. Outer cup cover; 41. Filter cartridge; 411. Baffle ring; 42. Exhaust port. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 A rotary kiln head exhaust device includes a rotary kiln 1, a kiln head hood 11, an exhaust pipe 12, an exhaust fan 13, and a pressure sensor 14. A connecting pipe 2 is installed on the exhaust fan 13. A flow divider ring box 3 is rotatably connected to the outside of the connecting pipe 2. An inner ring 31 and several partition plates 33 are provided inside the flow divider ring box 3. The partition plates 33 are installed between the inner ring 31 and the flow divider ring box 3. The inner ring 31 is rotatably connected to the outside of the connecting pipe 2. A discharge port 21 is opened on one side of the connecting pipe 2. Several docking holes 32 are opened on the side wall of the inner ring 31. The several docking holes 32 are connected to the discharge port 21 in sequence. Several through holes 34 are opened at the bottom of the flow divider ring box 3. Several outer cup covers 4 are provided at the bottom of the flow divider ring box 3. A filter cylinder 41 is provided inside the outer cup cover 4. The filter cylinder 41 is connected to the corresponding through hole 34. Several exhaust holes 42 are opened at the bottom of the outer cup cover 4.

[0021] Specifically, during operation, the exhaust fan 13 operates, transporting the high-temperature flue gas inside the kiln head hood 11 through the exhaust pipe 12 and connecting pipe 2. The connecting pipe 2, through the discharge port 21, discharges the gas one by one into multiple spaces composed of an inner ring 31, a diversion ring box 3, and several partition plates 33. The outer cup hood 4 and the filter cylinder 41 can rotate with the diversion ring box 3. When they rotate to the angle corresponding to the discharge port 21, the gas passes through the filter cylinder 41 and is discharged, while the coal powder is trapped inside the filter cylinder 41. As the outer cup hood 4 continues to rotate, when it rotates to the position behind the discharge port 21, the outer cup hood can be opened. 4. Disassemble the filter cylinder 41 to transfer the collected coal powder. The filter cylinder 41 and the coal powder inside have sufficient time to cool down, avoiding high temperature affecting the removal of coal powder. Through the cooperation of the rotatable outer cup cover 4 and the filter cylinder 41, it is not necessary to stop the operation of the rotary kiln and the exhaust system when collecting coal powder, realizing continuous production and solving the problem of production interruption and efficiency reduction caused by shutdown. At the same time, the filter cylinder 41 efficiently intercepts unburned coal powder, reducing fuel waste, reducing production energy consumption and cost, and taking into account the needs of efficient coal powder interception and continuous system operation.

[0022] In one embodiment of this utility model, such as Figures 1-4 As shown, a baffle 22 is installed on one side of the connecting pipe 2, and an L-shaped conveying pipe 23 is installed at the bottom of the baffle 22. Several outer cup covers 4 are rotated to the top of the baffle 22 in sequence, and the outer cup covers 4 are connected to the internal space of the L-shaped conveying pipe 23 through the exhaust hole 42.

[0023] Specifically, when the outer cup cover 4 rotates to above the baffle 22, the exhaust hole 42 at the bottom of the outer cup cover 4 connects with the internal space of the L-shaped conveying pipe 23. At this time, the clean gas that is free of coal dust after being filtered by the filter cartridge 41 will enter the L-shaped conveying pipe 23 through the exhaust hole 42 and be transported to the subsequent processing or discharge stage along the L-shaped conveying pipe 23; while the coal dust intercepted by the filter cartridge 41 remains inside the filter cartridge 41.

[0024] In one embodiment of this utility model, such as Figures 1-4 As shown, a drive motor 24 is installed at the top of the connecting pipe 2, and a U-shaped drive frame 25 is connected to the output end of the drive motor 24. The U-shaped drive frame 25 is installed at the top of the diverter ring box 3.

[0025] Specifically, during operation, the drive motor 24 starts, and its output drives the U-shaped drive frame 25 to rotate. Since the U-shaped drive frame 25 is installed at the top of the diversion ring box 3, the diversion ring box 3 will rotate under the transmission action of the U-shaped drive frame 25. The rotation of the diversion ring box 3 will then drive several outer cup covers 4 at its bottom to rotate synchronously, so that the outer cup covers 4 and the internal filter cylinder 41 can be connected to the discharge port 21 on the connecting pipe 2 in sequence, thereby realizing the continuous interception and collection of coal powder in the high-temperature flue gas. At the same time, the outer cup covers 4 and the filter cylinder 41 that have completed the coal powder collection can be rotated to a suitable position for subsequent coal powder transfer operations.

[0026] In one embodiment of this utility model, such as Figures 1-4 As shown, a retaining ring 411 is installed on the outside of the filter cartridge 41, and the retaining ring 411 abuts against the bottom of the diversion ring box 3.

[0027] Specifically, when installing the filter cartridge 41, it is pushed upwards from inside the outer cup cover 4 so that its top aligns with the through hole 34 at the bottom of the diversion ring box 3. When the retaining ring 411 contacts and abuts against the bottom surface of the diversion ring box 3, it indicates that the filter cartridge 41 has been installed in place. The retaining ring 411 acts as a mechanical stop to ensure the accuracy and consistency of each installation, avoiding air or dust leakage due to improper or misaligned installation. At the same time, the abutment between the retaining ring 411 and the bottom of the diversion ring box 3 forms an annular sealing line on the contact surface, effectively preventing high-temperature dusty flue gas from leaking directly from the gap without being filtered by the filter cartridge 41, ensuring the interception efficiency of coal dust. This eliminates the need for complex alignment and tightening operations during the installation and removal of the filter cartridge 41, enabling quick, convenient, and reliable replacement and disassembly.

[0028] In one embodiment of this utility model, such as Figures 1-4 As shown, several threaded rings 35 are installed at the bottom of the flow divider ring box 3. The threaded rings 35 correspond to the positions of the through holes 34, and the outer cup cover 4 is threadedly connected to the inner wall of the corresponding threaded ring 35.

[0029] Specifically, when the outer cup cover 4 needs to be installed, it can simply be screwed into the threaded ring 35 to achieve a secure connection using the threaded fit, forming an effective seal at the threaded contact surface to prevent high-temperature dusty flue gas from leaking from the connection. When the filter cartridge 41 needs to be removed to clean the collected coal dust, the outer cup cover 4 can be removed from the threaded ring 35 simply by rotating it in the opposite direction. The operation is simple and quick, requiring no complicated tools. Since the outer cup cover 4 rotates with the diversion ring box 3, it can be disassembled and installed in non-working areas. Therefore, the entire process of cleaning or replacing the filter cartridge 41 does not require interruption of the normal operation of the rotary kiln and exhaust system, realizing online and continuous collection and treatment of coal dust.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] Working principle: During operation, the drive motor 24 starts, and its output drives the U-shaped drive frame 25 to rotate, which in turn drives the diversion ring box 3 and several outer cup covers 4 at the bottom to rotate synchronously. At the same time, the exhaust fan 13 operates, transporting the high-temperature flue gas in the kiln head hood 11 to the connecting pipe 2 through the exhaust pipe 12. The connecting pipe 2 discharges the gas one by one into multiple spaces composed of the inner ring 31, the diversion ring box 3, and the partition plate 33 through the discharge port 21. When the outer cup cover 4 and the inner filter cylinder 41 rotate with the diversion ring box 3 to the angle corresponding to the discharge port 21, the high-temperature flue gas passes through the filter cylinder 41, and the unburned coal powder is intercepted in the filter cylinder 41. The filtered clean gas is discharged through the exhaust port 42 at the bottom of the outer cup cover 4. When the outer cup cover 4 continues to rotate above the baffle 22, the exhaust port 42 connects with the L-shaped conveying pipe 23, and the clean gas enters the subsequent processing stage along the L-shaped conveying pipe 23. When installing the filter cartridge 41, push it upwards from the outer cup cover 4 until the outer retaining ring 411 presses against the bottom of the diversion ring box 3 to achieve precise positioning and sealing. When the outer cup cover 4 is rotated to the non-working area, rotate the outer cup cover 4 in the opposite direction to remove it from the corresponding threaded ring 35 at the bottom of the diversion ring box 3. The filter cartridge 41 can then be removed to transfer the coal powder. The filter cartridge 41 and the coal powder have been fully cooled. The entire process does not require interruption of the rotary kiln and exhaust system, achieving efficient coal powder interception and continuous production.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary kiln head exhaust device, comprising a rotary kiln (1), a kiln head hood (11), an exhaust pipe (12), an exhaust fan (13), and a pressure sensor (14), characterized in that, A connecting pipe (2) is installed on the exhaust fan (13). A diversion ring box (3) is rotatably connected to the outside of the connecting pipe (2). An inner ring (31) and several partition plates (33) are provided inside the diversion ring box (3). The partition plates (33) are installed between the inner ring (31) and the diversion ring box (3). The inner ring (31) is rotatably connected to the outside of the connecting pipe (2). An exhaust port (21) is opened on one side of the connecting pipe (2). 1) Several docking holes (32) are provided on the side wall, and the several docking holes (32) are connected to the discharge port (21) in sequence. Several through holes (34) are provided at the bottom of the diversion ring box (3). Several outer cup covers (4) are provided at the bottom of the diversion ring box (3). A filter cylinder (41) is provided inside the outer cup cover (4). The filter cylinder (41) is connected to the corresponding through hole (34). Several exhaust holes (42) are provided at the bottom of the outer cup cover (4).

2. The rotary kiln head exhaust device according to claim 1, characterized in that, A baffle (22) is installed on one side of the connecting pipe (2), and an L-shaped conveying pipe (23) is installed at the bottom of the baffle (22). Several outer cup covers (4) are rotated to the top of the baffle (22) in sequence, and the outer cup covers (4) are connected to the internal space of the L-shaped conveying pipe (23) through the exhaust hole (42).

3. The rotary kiln head exhaust device according to claim 2, characterized in that, A drive motor (24) is installed at the top of the connecting pipe (2), and a U-shaped drive frame (25) is connected to the output end of the drive motor (24). The U-shaped drive frame (25) is installed at the top of the diversion ring box (3).

4. The rotary kiln head exhaust device according to claim 3, characterized in that, A retaining ring (411) is installed on the outside of the filter cartridge (41), and the retaining ring (411) abuts against the bottom of the flow divider ring box (3).

5. The rotary kiln head exhaust device according to claim 4, characterized in that, The bottom of the diversion ring box (3) is equipped with several threaded rings (35), the threaded rings (35) are corresponding to the positions of the through holes (34), and the outer cup cover (4) is threadedly connected to the inner wall of the corresponding threaded rings (35).

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