Calcium carbide rotary kiln tail gas low-temperature catalytic deamination equipment

Abstract

This utility model relates to the field of tail gas catalytic purification technology, specifically a low-temperature catalytic deammoniation device for tail gas from a calcium carbide rotary kiln. It includes a support frame, with a low-temperature catalytic tank fixedly connected to the inner wall of the support frame. A reciprocating slider is rotatably connected to the low-temperature catalytic tank. A first gear is fixedly connected to the surface of the reciprocating slider, and multiple annularly arranged second gears are meshed with the surface of the first gear. A servo motor is fixedly connected to the low-temperature catalytic tank, and the output end of the servo motor is fixedly connected to the upper end of the leftmost second gear. This utility model enables the servo motor to drive the gear set, causing the first circular rod and its surface stirring blades to rotate, thus fully stirring the tail gas in the low-temperature catalytic tank. Simultaneously, the cooperation between the reciprocating slider and the reciprocating lead screw allows for a more comprehensive stirring range, increasing the contact area and reaction time between the tail gas and the catalytic medium, resulting in a more complete deammoniation reaction and superior tail gas purification effect.

Description

Technical Field

[0001] This utility model relates to the field of tail gas catalytic purification technology, specifically a low-temperature catalytic deammoniation device for tail gas from a calcium carbide rotary kiln. Background Technology

[0002] In the calcium carbide production process, the rotary kiln, as a key piece of equipment, generates a large amount of exhaust gas. If the ammonia contained in the exhaust gas is directly emitted, it will not only cause serious pollution to the atmospheric environment, causing environmental problems such as acid rain and smog, but may also endanger human health.

[0003] Currently, some ammonia removal technologies and corresponding equipment have been put into use for the treatment of ammonia in the tail gas of calcium carbide rotary kilns. However, existing equipment has many shortcomings in actual operation: on the one hand, the contact between the tail gas and the catalytic medium is not sufficient, resulting in low ammonia removal efficiency, which makes it difficult to meet increasingly stringent environmental emission standards; on the other hand, impurities generated by the reaction are easily accumulated inside the equipment, and the cleaning and maintenance process is complex and cumbersome, increasing the operating cost and maintenance difficulty of the equipment and affecting its long-term stable operation. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature catalytic deammoniation device for the tail gas of a calcium carbide rotary kiln, so as to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is: a low-temperature catalytic deammoniation device for tail gas of a calcium carbide rotary kiln, comprising a support frame, a low-temperature catalytic barrel fixedly connected to the inner wall of the support frame, a reciprocating slider rotatably connected to the low-temperature catalytic barrel, a first gear fixedly connected to the surface of the reciprocating slider, a plurality of annularly arranged second gears meshing with the surface of the first gear, a servo motor fixedly connected to the low-temperature catalytic barrel, the output end of the servo motor being fixedly connected to the upper end of the leftmost second gear, a reciprocating lead screw rotatably connected to the inner wall of the reciprocating slider, and an exhaust port communicating with the interior of the low-temperature catalytic barrel fixedly connected to the upper end of the low-temperature catalytic barrel.

[0006] Preferably, the interior of the low-temperature catalytic tank has a plurality of annularly arranged first round rods, the upper ends of which penetrate the inner top surface of the low-temperature catalytic tank and extend upwards. The upper ends of the plurality of first round rods are fixedly connected to the lower ends of adjacent second gears, and a plurality of parallel stirring blades are fixedly connected to the surfaces of the plurality of first round rods.

[0007] Preferably, a second round rod is fixedly connected to the lower end of the reciprocating lead screw, a first disc is fixedly connected to the surface of the second round rod, a second disc is fixedly connected to the surface of the second round rod, a first round hole is opened at the lower end of the second round hole, a limit strip is fixedly connected to the inner wall of the first round hole, a third round rod is slidably connected to the inner wall of the first round hole, a limit groove matching the limit strip is opened on the surface of the third round rod, and a plurality of annularly arranged cleaning rods are fixedly connected to the surface of the third round rod, the surface of the cleaning rods being in contact with the inner bottom surface of the low-temperature catalytic tank.

[0008] Preferably, the lower end of the third round rod is provided with a second round hole, the inner wall of the second round hole is slidably connected to a fourth round rod, the surface of the fourth round rod is fixedly connected to a first round plate, the surface of the fourth round rod is fixedly connected to a second round plate, the lower end of the low-temperature catalytic tank is fixedly connected to a cleaning pipe communicating with its interior, the inner wall of the upper half of the cleaning pipe matches the surface of the first round plate, the inner wall of the lower half of the cleaning pipe matches the surface of the second round plate, the surface of the cleaning pipe is threadedly connected to a threaded sleeve, and the inner bottom surface of the threaded sleeve is rotatably connected to the lower end of the fourth round rod.

[0009] Preferably, the surface of the low-temperature catalytic barrel is fixedly connected with a plurality of parallel fixed blocks, and the inner walls of the plurality of fixed blocks are fixedly connected with the same air inlet pipe, the lower end of the air inlet pipe penetrating the inner wall of the low-temperature catalytic barrel and extending into the interior.

[0010] This utility model provides an improved low-temperature catalytic deammoniation device for calcium carbide rotary kiln tail gas, which has the following improvements and advantages compared with the prior art: Firstly, this utility model uses a servo motor to drive a gear set, which in turn rotates the first round rod and the stirring blades on its surface, thus fully stirring the exhaust gas in the low-temperature catalytic tank. At the same time, the cooperation between the reciprocating slider and the reciprocating lead screw makes the stirring range more comprehensive, increases the contact area and reaction time between the exhaust gas and the catalytic medium, and makes the deammoniation reaction more complete, resulting in a better exhaust gas purification effect.

[0011] Secondly, this utility model features convenient cleaning and maintenance functions, reducing the difficulty of maintenance during use. The cleaning rod, driven by the transmission structure, can clean the bottom surface inside the low-temperature catalytic tank, preventing impurities from accumulating and affecting the reaction; the cleaning pipe, in conjunction with relevant discs and threaded sleeves, can easily control the discharge of impurities, helping to keep the inside of the equipment clean and extend its service life. Attached Figure Description

[0012] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2This is a cross-sectional structural schematic diagram of the present invention; Figure 3 This is a split diagram of the cleaning rod, the third round rod, and the fourth round rod of this utility model; Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0013] Explanation of reference numerals in the attached figures: 1. Support; 2. Low-temperature catalytic converter; 3. Reciprocating slider; 4. First gear; 5. Second gear; 6. Servo motor; 7. Reciprocating lead screw; 8. Exhaust port; 9. First round rod; 10. Stirring blade; 11. Second round rod; 12. Cleaning rod; 13. First disc; 14. Second disc; 15. First round hole; 16. Limiting strip; 17. Third round rod; 18. Limiting groove; 19. Second round hole; 20. Fourth round rod; 21. First disc; 22. Second disc; 23. Cleaning pipe; 24. Threaded sleeve; 25. Fixing block; 26. Air inlet pipe. Detailed Implementation

[0014] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0015] This utility model provides an improved low-temperature catalytic deammoniation device for calcium carbide rotary kiln tail gas. The technical solution of this utility model is as follows: like Figure 1 - Figure 4 As shown, a low-temperature catalytic ammonia removal device for the tail gas of a calcium carbide rotary kiln includes a support 1. A low-temperature catalytic tank 2 is fixedly connected to the inner wall of the support 1. A reciprocating slider 3 is rotatably connected to the low-temperature catalytic tank 2. A first gear 4 is fixedly connected to the surface of the reciprocating slider 3. Multiple annularly arranged second gears 5 are meshed with the surface of the first gear 4. A servo motor 6 is fixedly connected to the low-temperature catalytic tank 2. The output end of the servo motor 6 is fixedly connected to the upper end of the leftmost second gear 5. A reciprocating lead screw 7 is rotatably connected to the inner wall of the reciprocating slider 3. An exhaust port 8 communicating with the interior of the low-temperature catalytic tank 2 is fixedly connected to the upper end of the low-temperature catalytic tank 2.

[0016] Furthermore, the interior of the low-temperature catalytic tank 2 has multiple annularly arranged first round rods 9. The upper ends of the multiple first round rods 9 penetrate through the inner top surface of the low-temperature catalytic tank 2 and extend upwards. The upper ends of the multiple first round rods 9 are fixedly connected to the lower ends of the adjacent second gears 5. Multiple sets of parallel stirring blades 10 are fixedly connected to the surface of the multiple first round rods 9. When the multiple annularly arranged first round rods 9 rotate with the second gears 5, the multiple sets of stirring blades 10 on the surface can fully stir the tail gas in the low-temperature catalytic tank 2, increase the contact area between the tail gas and the catalytic medium, and improve the uniformity and efficiency of the catalytic deammoniation reaction.

[0017] Furthermore, a second round rod 11 is fixedly connected to the lower end of the reciprocating screw 7. A first disc 13 is fixedly connected to the surface of the second round rod 11, and a second disc 14 is fixedly connected to the surface of the second round rod 11. A first round hole 15 is opened at the lower end of the second disc 14. A limiting strip 16 is fixedly connected to the inner wall of the first round hole 15. A third round rod 17 is slidably connected to the inner wall of the first round hole 15. A limiting groove 18 matching the limiting strip 16 is opened on the surface of the third round rod 17. A plurality of annularly arranged cleaning rods 12 are fixedly connected to the surface of the third round rod 17. The surface of the cleaning rods 12 is in contact with the inner bottom surface of the low-temperature catalytic tank 2. When the reciprocating screw 7 drives the second round rod 11 to move, the third round rod 17 is driven to rotate through the cooperation of the limiting strip 16 and the limiting groove 18, so that the cleaning rods 12 clean the inner bottom surface of the low-temperature catalytic tank 2 in real time, avoiding the accumulation of impurities generated by the reaction, ensuring the cleanliness of the equipment and maintaining a stable catalytic environment.

[0018] Furthermore, a second circular hole 19 is provided at the lower end of the third circular rod 17. A fourth circular rod 20 is slidably connected to the inner wall of the second circular hole 19. A first circular plate 21 and a second circular plate 22 are fixedly connected to the surface of the fourth circular rod 20. A cleaning pipe 23 communicating with the interior of the low-temperature catalytic tank 2 is fixedly connected to the lower end of the tank. The inner wall of the upper half of the cleaning pipe 23 matches the surface of the first circular plate 21, and the inner wall of the lower half of the cleaning pipe 23 matches the surface of the second circular plate 22. A threaded sleeve 24 is threadedly connected to the surface of the cleaning pipe 23. The inner bottom surface of the threaded sleeve 24 is rotatably connected to the lower end of the fourth circular rod 20. Rotating the threaded sleeve 24 can drive the first circular plate 21 and the second circular plate 22 to move up and down through the fourth circular rod 20, thereby opening and sealing the cleaning pipe 23. This facilitates the rapid discharge of impurities cleaned by the cleaning rod 12, and the double circular plate structure can improve the sealing effect and prevent exhaust gas leakage.

[0019] Furthermore, multiple parallel fixing blocks 25 are fixedly connected to the surface of the low-temperature catalytic tank 2. The inner walls of the multiple fixing blocks 25 are fixedly connected to the same air inlet pipe 26. The lower end of the air inlet pipe 26 penetrates the inner wall of the low-temperature catalytic tank 2 and extends into the interior. The air inlet pipe 26 is stably fixed to the surface of the low-temperature catalytic tank 2 by the multiple fixing blocks 25, and the lower end extends directly into the tank. This ensures that the tail gas of the calcium carbide rotary kiln is stably and evenly introduced into the interior of the low-temperature catalytic tank 2, ensuring the continuous and efficient catalytic deammoniation reaction.

[0020] Working principle: Start the servo motor 6, and its output end drives the leftmost second gear 5 to rotate. Since multiple second gears 5 are connected to the surface of the first gear 4 in a ring mesh, all second gears 5 rotate synchronously, and then drive the reciprocating slider 3 to rotate on the low temperature catalytic tank 2 through the first gear 4. The tail gas from the calcium carbide rotary kiln is introduced into the low-temperature catalytic tank 2 through the inlet pipe 26 and the fixed position of the fixed block 25. The low-temperature catalytic tank 2 provides the environment required for the low-temperature catalytic reaction. When the second gear 5 rotates, the first round rod 9, which is fixedly connected to its lower end, rotates synchronously, so that the multiple sets of stirring blades 10 on the surface of the first round rod 9 stir the tail gas in the low-temperature catalytic tank 2, promote the full contact between the tail gas and the catalytic medium, and improve the deammoniation reaction efficiency. When the reciprocating slider 3 rotates, the reciprocating lead screw 7 on its inner wall rotates and reciprocates, driving the second round rod 11 at the lower end to move synchronously. The second round rod 11 cooperates with the limiting groove 18 of the third round rod 17 through the limiting strip 16 of the second disc 14, driving the third round rod 17 to rotate, so that the cleaning rod 12 cleans the bottom surface of the low temperature catalytic tank 2 to prevent impurities from accumulating; When impurities need to be cleaned, rotate the threaded sleeve 24 to move it down along the surface of the cleaning pipe 23, which will drive the fourth round rod 20 to move downward. The first round plate 21 and the second round plate 22 will move down accordingly, opening the channel of the cleaning pipe 23 and allowing impurities to be discharged through the cleaning pipe 23. When closing, rotate the threaded sleeve 24 in the opposite direction to reset the first round plate 21 and the second round plate 22 and seal the cleaning pipe 23. The purified exhaust gas after low-temperature catalytic deammoniation is discharged from the low-temperature catalytic tank 2 through exhaust port 8.

[0021] The foregoing description enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-temperature catalytic deammoniation device for tail gas from a calcium carbide rotary kiln, comprising a support frame (1), characterized in that: The inner wall of the support (1) is fixedly connected to a low-temperature catalytic barrel (2), and a reciprocating slider (3) is rotatably connected to the low-temperature catalytic barrel (2). A first gear (4) is fixedly connected to the surface of the reciprocating slider (3), and multiple ring-shaped second gears (5) are meshed on the surface of the first gear (4). A servo motor (6) is fixedly connected to the low-temperature catalytic barrel (2), and the output end of the servo motor (6) is fixedly connected to the upper end of the leftmost second gear (5). A reciprocating screw (7) is rotatably connected to the inner wall of the reciprocating slider (3), and an exhaust port (8) communicating with the interior of the low-temperature catalytic barrel (2) is fixedly connected to the upper end of the low-temperature catalytic barrel (2).

2. The low-temperature catalytic deammoniation equipment for calcium carbide rotary kiln tail gas according to claim 1, characterized in that: The interior of the low-temperature catalytic tank (2) has a plurality of annularly arranged first round rods (9). The upper ends of the plurality of first round rods (9) penetrate the inner top surface of the low-temperature catalytic tank (2) and extend upward. The upper ends of the plurality of first round rods (9) are fixedly connected to the lower ends of the adjacent second gears (5). The surfaces of the plurality of first round rods (9) are all fixedly connected with a plurality of parallelly arranged stirring blades (10).

3. The low-temperature catalytic deammoniation equipment for calcium carbide rotary kiln tail gas according to claim 2, characterized in that: The lower end of the reciprocating screw (7) is fixedly connected to a second round rod (11), the surface of the second round rod (11) is fixedly connected to a first disc (13), the surface of the second round rod (11) is fixedly connected to a second disc (14), the lower end of the second disc (14) is provided with a first round hole (15), the inner wall of the first round hole (15) is fixedly connected to a limiting strip (16), the inner wall of the first round hole (15) is slidably connected to a third round rod (17), the surface of the third round rod (17) is provided with a limiting groove (18) that matches the limiting strip (16), the surface of the third round rod (17) is fixedly connected to a plurality of annularly arranged cleaning rods (12), the surface of the cleaning rods (12) is in contact with the inner bottom surface of the low temperature catalytic tank (2).

4. The low-temperature catalytic deammoniation equipment for calcium carbide rotary kiln tail gas according to claim 3, characterized in that: The lower end of the third round rod (17) is provided with a second round hole (19), and the inner wall of the second round hole (19) is slidably connected to a fourth round rod (20). The surface of the fourth round rod (20) is fixedly connected to a first round plate (21), and the surface of the fourth round rod (20) is fixedly connected to a second round plate (22). The lower end of the low-temperature catalytic tank (2) is fixedly connected to a cleaning pipe (23) that communicates with its interior. The inner wall of the upper half of the cleaning pipe (23) matches the surface of the first round plate (21), and the inner wall of the lower half of the cleaning pipe (23) matches the surface of the second round plate (22). The surface of the cleaning pipe (23) is threadedly connected to a threaded sleeve (24), and the inner bottom surface of the threaded sleeve (24) is rotatably connected to the lower end of the fourth round rod (20).

5. The low-temperature catalytic deammoniation equipment for calcium carbide rotary kiln tail gas according to claim 4, characterized in that: The surface of the low-temperature catalytic barrel (2) is fixedly connected with a plurality of parallel fixed blocks (25), and the inner walls of the plurality of fixed blocks (25) are fixedly connected with the same air inlet pipe (26). The lower end of the air inlet pipe (26) penetrates the inner wall of the low-temperature catalytic barrel (2) and extends into the interior.

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