A flue gas treatment device for a tunnel kiln of calcium-magnesium brick refractory material

Abstract

This is a flue gas treatment device for a tunnel kiln of calcium-magnesium brick refractory materials, belonging to the field of flue gas purification equipment for refractory materials. The flue gas outlet of the tunnel kiln is sequentially connected to a self-cleaning filter mechanism, a suction pump A, and a liquid separation filter mechanism. The purified flue gas is returned to the kiln body circulation inlet to realize waste heat recovery. The self-cleaning filter mechanism is equipped with a horizontal cylinder and a filter screen. The motor drives the F-shaped annular sliding plate to rotate through gears and an internal gear ring, which drives the trapezoidal brush to clean the screen and the dust accumulated on the edges. Combined with the suction pump B for negative pressure dust collection, online dust removal is possible without stopping the machine or disassembling it. After the flue gas is initially filtered by the screen, it enters the liquid separation shell for spray washing to complete gas-liquid separation. This device solves the problems of easy screen clogging, production interruption during dust removal, and difficulty in manual cleaning in traditional systems. The two-stage purification and dust removal effect is good, and the dust is isolated from the transmission mechanism to extend the equipment life. It is suitable for continuous firing conditions of calcium-magnesium bricks and reduces production energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas treatment equipment for tunnel kilns of refractory materials, and in particular to a flue gas treatment device for tunnel kilns of calcium magnesium brick refractory materials. Background Technology

[0002] The entire firing and processing of calcium magnesium brick refractory materials relies on high-temperature firing in a tunnel kiln. During the firing process, high-temperature flue gas is continuously emitted, which contains solid pollutants such as refractory raw material dust and sintering impurity particles. Existing tunnel kiln flue gas treatment devices mostly adopt fixed screen filtration structures, and flue gas impurities are very easy to adhere to and clog the filter screen mesh.

[0003] The existing processing equipment requires shutting down the kiln and dismantling the machine offline to clean the screens. This not only interrupts the continuous firing process of calcium-magnesium bricks and reduces the production efficiency of the tunnel kiln, but also results in a large workload for manual dust cleaning, which is not thorough. Long-term use will significantly reduce the efficiency of flue gas filtration and circulation purification, and it cannot meet the flue gas treatment requirements of large-scale continuous firing of calcium-magnesium bricks.

[0004] Therefore, it is essential to provide a flue gas treatment device for a tunnel kiln made of calcium-magnesium brick refractory materials to address the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a flue gas treatment device for a tunnel kiln of calcium magnesium brick refractory materials, which avoids the shortcomings of the prior art. This utility model solves the problems of easy clogging of the flue gas filter screen of the existing tunnel kiln, the need to stop the machine for disassembly and cleaning, the inability to self-clean online, and the low efficiency of flue gas purification and reuse.

[0006] The above-mentioned objectives of this utility model are achieved through the following technical means.

[0007] A flue gas treatment device for a tunnel kiln for calcium-magnesium brick refractory materials is provided, including a tunnel kiln body, a tunnel kiln exhaust port and a tunnel kiln circulating air inlet on the tunnel kiln body, a self-cleaning filter mechanism connected to the tunnel kiln exhaust port by a pipeline, a suction pump A connected to one side of the self-cleaning filter mechanism by a pipeline, a liquid separation filter mechanism connected to the outlet of the suction pump A by a pipeline, and a circulating air inlet of the tunnel kiln connected to one side of the liquid separation filter mechanism by a pipeline.

[0008] The self-cleaning filter mechanism includes a horizontal cylindrical body. The air inlet of the horizontal cylindrical body is connected to the exhaust port of the tunnel kiln. A filter screen is installed inside the horizontal cylindrical body, and a filter cleaning component is installed on the side of the filter screen near the exhaust port of the tunnel kiln.

[0009] The filter cleaning assembly includes an annular inner cavity partition and an annular groove. The annular inner cavity partition and the horizontal cylindrical body enclose each other to form an annular inner cavity. The annular inner cavity partition includes a horizontal part and a vertical part. The annular groove is opened inside the horizontal cylindrical body. An annular sliding plate is rotatably assembled inside the annular groove via a bearing. The cross-section of the annular sliding plate is F-shaped. The inner side of the annular sliding plate is rotatably assembled with the vertical part of the inner cavity partition via a bearing. The vertical part of the inner cavity partition divides the annular sliding plate into a driving part and a rotating part. The port of the horizontal part of the inner cavity partition, which is backed by the vertical part of the inner cavity partition, is sealed and installed at the air inlet of the horizontal cylindrical body.

[0010] An internal gear ring is provided on the inner concave surface of the annular sliding plate located in the annular cavity. A motor is installed on the inner wall of the annular cavity, and a gear is fixedly installed on the output shaft of the motor. The gear meshes with and drives the internal gear ring. A support rod is installed on the inner side of the annular sliding plate that is against the annular cavity. A support frustum is installed on the outer end of the support rod. Three brushes are installed at equal angles along the circumference on the upper end face of the support frustum. Each brush moves against the end face of the filter screen. A dust suction port is provided on the bottom side wall of the annular groove. The dust suction port pipe is connected to a suction pump B. The air outlet pipe of the suction pump B is connected to a dust collection box.

[0011] Preferably, the liquid separation filtration mechanism includes a liquid separation shell, a water storage tank is installed on the top of the liquid separation shell, a spray head is connected to the water storage tank via a pipeline, the spray head is installed on the top of the inner wall of the liquid separation shell, the liquid separation shell is connected to the air outlet of the horizontal cylindrical body via a pipeline, and a purified gas outlet and a liquid outlet are opened from top to bottom on the side of the liquid separation shell away from the horizontal cylindrical body, the purified gas outlet is connected to the circulating air inlet of the tunnel kiln.

[0012] Preferably, the side of each brush head is trapezoidal, the large end face of the brush moves against the end face of the filter screen, and the side of one of the brushes moves against the edge gap between the horizontal cylindrical body and the filter screen.

[0013] This utility model features a dedicated filter cleaning component. Relying on the meshing transmission of a motor, gears, and an internal gear ring, it drives the annular sliding plate to rotate throughout the entire area. Combined with the circumferentially arranged trapezoidal brushes, it fully covers and sweeps dust from the filter screen surface and edge gaps. With the help of suction pump B and negative pressure dust collection box, it achieves online automatic cleaning of the filter screen without stopping or disassembling the machine, ensuring continuous roasting operation in the tunnel kiln and improving production efficiency.

[0014] The flue gas passes through a self-cleaning filter mechanism for solid dust removal and a liquid separation filter mechanism for spray gas-liquid purification. After purification, the flue gas is directly returned to the circulating air inlet of the tunnel kiln for reuse, realizing the closed-loop utilization of waste heat flue gas in the kiln, reducing energy consumption, and is suitable for the high-temperature dust-containing sintering flue gas treatment of calcium magnesium bricks.

[0015] The annular sliding plate adopts an F-shaped cross-section structure, which is combined with the bearing seal rotation assembly to isolate the flue gas flow cavity from the drive cavity, prevent dust from corroding the transmission structure, improve the stability of equipment operation, and extend the service life of components. Attached Figure Description

[0016] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0017] Figure 1 This is a three-dimensional view of the overall structure of a tunnel kiln flue gas treatment device for calcium-magnesium brick refractory materials according to this utility model.

[0018] Figure 2 This is a partial three-dimensional view of a flue gas treatment device for a tunnel kiln using calcium-magnesium brick refractory materials, according to this utility model.

[0019] Figure 3 This is a cross-sectional view of the self-cleaning filter mechanism of a tunnel kiln flue gas treatment device for calcium-magnesium brick refractory materials according to this utility model.

[0020] Figure 4 This is a cross-sectional structural diagram of the self-cleaning filter mechanism of a tunnel kiln flue gas treatment device for calcium-magnesium brick refractory materials according to this utility model.

[0021] Figure 5 This is a cross-sectional schematic diagram of the self-cleaning filter mechanism without an annular inner cavity partition of a flue gas treatment device for a calcium-magnesium brick refractory material tunnel kiln according to the present invention.

[0022] from Figures 1 to 5 Including: 1. Smoke vent of the tunnel kiln; 2. Tunnel kiln circulating air inlet; 3. Self-cleaning filter mechanism; 4. Suction pump A; 5. Horizontal cylindrical body; 6. Filter screen; 7. Filter cleaning assembly; 8. Annular inner cavity partition; 9. Annular groove; 10. Annular inner cavity; 11. Horizontal part of the inner cavity partition; 12. Vertical part of the inner cavity partition; 13. Annular sliding plate; 14. Drive unit; 15. Rotating part; 16. Internal gear ring; 17. Electric motor; 18. Gear; 19. Support rod; 20. Support the frustum; 21. Brush; 22. Dust suction port; 23. Suction pump B; 24. Dust collection box; 25. Liquid separation shell; 26. Water storage tank; 27. Sprayer head; 28. Purified gas outlet; 29. Liquid outlet; 30. Liquid separation and filtration mechanism. Detailed Implementation

[0023] The present invention will be further described in conjunction with the following embodiments.

[0024] Example 1.

[0025] like Figure 1-5 As shown, a flue gas treatment device for a tunnel kiln of calcium-magnesium brick refractory material includes a tunnel kiln body, a tunnel kiln exhaust port 1 and a tunnel kiln circulating air inlet 2 on the tunnel kiln body, a pipeline of the tunnel kiln exhaust port 1 connected to a self-cleaning filter mechanism 3, a pipeline of the outlet end of the self-cleaning filter mechanism 3 connected to a suction pump A 4, a pipeline of the outlet end of the suction pump A 4 connected to a liquid separation filter mechanism 30, and a pipeline of the outlet end of the liquid separation filter mechanism 30 connected to the tunnel kiln circulating air inlet 2, forming a closed-loop flue gas purification and reuse path.

[0026] The self-cleaning filter mechanism 3 includes a horizontal cylindrical body 5. The air inlet of the horizontal cylindrical body 5 is connected to the exhaust port 1 of the tunnel kiln. A filter screen 6 is fixedly installed inside the cylinder. A filter cleaning component 7 is installed on the smoke-facing side of the filter screen 6. The filter cleaning component 7 consists of an annular inner cavity partition 8 and an annular groove 9. The annular inner cavity partition 8 and the horizontal cylindrical body 5 together form an annular inner cavity 10. The annular inner cavity partition 8 is integrally divided into a horizontal part 11 and a vertical part 12. The annular groove 9 is formed on the inner wall of the horizontal cylindrical body 5. 9 is located at the end face of the filter screen 6, which faces the side of the tunnel kiln exhaust port 1. The annular groove 9 has an F-shaped cross-section annular sliding plate 13 rotatably mounted on the bearing inside. The inner side of the annular sliding plate 13 is rotatably mounted on the outer ring of the vertical part 12 of the inner cavity partition through the bearing. The vertical part 12 of the inner cavity partition divides the annular sliding plate 13 into a driving part 14 and a rotating part 15. The end of the horizontal part 11 of the inner cavity partition is sealed and fixed at the air inlet position of the horizontal cylindrical body 5 to achieve isolation and sealing between the flue gas chamber and the driving chamber.

[0027] A motor 17 is fixed to the inner wall of the annular inner cavity 10. The output shaft of the motor 17 is fixed to a gear 18. An internal gear ring 16 is opened on the inner concave surface of the annular sliding plate 13. The gear 18 meshes with the internal gear ring 16 for transmission. A support rod 19 is fixed to the outer side of the annular sliding plate 13. A support frustum 20 is fixed to the outer end of the support rod 19. Three brushes 21 are fixed at equal angles around the support frustum 20. The trapezoidal brush head end of the brush 21 is attached to the end face of the filter screen 6. The side of one of the brushes 21 is tightly attached between the edge of the horizontal cylindrical body 5 and the filter screen 6. A dust suction port 22 is opened at the bottom side wall of the annular groove 9. A suction pump B 23 is connected to the outside of the dust suction port 22. The suction pump B 23 is connected to the dust collection box 24 to realize negative pressure collection of cleaning dust.

[0028] The liquid separation and filtration mechanism 30 includes a liquid separation shell 25, a water storage tank 26 fixed on the top of the liquid separation shell 25, a spray head 27 connected to the water storage tank 26, the spray head 27 being suspended on the top of the inner cavity of the liquid separation shell 25, the air inlet of the liquid separation shell 25 being connected to the air outlet of the horizontal cylindrical body 5, and a purified gas outlet 28 and a liquid outlet 29 being opened from top to bottom on the side wall of the shell, and the purified gas outlet 28 being connected to the circulating air inlet 2 of the tunnel kiln.

[0029] The working process of this utility model is as follows: the suction pump A4 draws in the flue gas from the tunnel kiln. The flue gas enters the horizontal cylindrical body 5 from the tunnel kiln exhaust port 1. The filter screen 6 intercepts refractory dust particles in the flue gas. The motor 17 drives the gear 18 to mesh and drive the internal gear ring 16 to rotate. The annular sliding plate 13 rotates as a whole, driving the brush 21 to clean the dust on the surface and corners of the filter screen 6. The suction pump B 23 simultaneously suctions the dust under negative pressure. The dust is collected in the dust collection box 24 through the dust suction port 22. After primary filtration, the flue gas enters the liquid separation shell 25. The water storage tank 26 supplies water to spray and wash the flue gas through the spray head 27 to remove residual impurities. The waste liquid is discharged from the liquid outlet 29. The clean flue gas flows back to the tunnel kiln circulation air inlet 2 through the purified gas outlet 28 to realize the recycling of flue gas.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A tunnel kiln flue gas treatment device for calcium-magnesia brick refractory material, comprising a tunnel kiln body, a tunnel kiln flue gas outlet and a tunnel kiln circulating air inlet are arranged on the tunnel kiln body, characterized in that: The tunnel kiln exhaust port is connected to a self-cleaning filter mechanism. One side of the self-cleaning filter mechanism is connected to a suction pump A. The exhaust port of the suction pump A is connected to a liquid separation filter mechanism. One side of the liquid separation filter mechanism is connected to the tunnel kiln circulation air inlet. The self-cleaning filter mechanism includes a horizontal cylindrical body, with a pipe connected to the exhaust port of the tunnel kiln at the air inlet of the horizontal cylindrical body. A filter screen is installed inside the horizontal cylindrical body, and a filter cleaning component is installed on the side of the filter screen near the exhaust port of the tunnel kiln. The filter cleaning assembly includes an annular inner cavity partition and an annular groove. The annular inner cavity partition and the horizontal cylindrical body enclose each other to form an annular inner cavity. The annular inner cavity partition includes a horizontal part and a vertical part. The annular groove is opened inside the horizontal cylindrical body. An annular sliding plate is rotatably assembled inside the annular groove via a bearing. The cross-section of the annular sliding plate is F-shaped. The inner side of the annular sliding plate is rotatably assembled with the vertical part of the inner cavity partition via a bearing. The vertical part of the inner cavity partition divides the annular sliding plate into a driving part and a rotating part. The port of the horizontal part of the inner cavity partition, which is backed by the vertical part of the inner cavity partition, is sealed and installed at the air inlet of the horizontal cylindrical body. An internal gear ring is provided on the inner concave surface of the annular sliding plate located in the annular cavity. A motor is installed on the inner wall of the annular cavity, and a gear is fixedly installed on the output shaft of the motor. The gear meshes with and drives the internal gear ring. A support rod is installed on the inner side of the annular sliding plate that is against the annular cavity. A support frustum is installed on the outer end of the support rod. Three brushes are installed at equal angles along the circumference on the upper end face of the support frustum. Each brush movably abuts against the end face of the filter screen. A dust suction port is provided on the bottom side wall of the annular groove. The dust suction port pipe is connected to a suction pump B. The air outlet pipe of the suction pump B is connected to a dust collection box.

2. A tunnel kiln flue gas treatment device for calcium-magnesia brick refractory material according to claim 1, characterized in that: The liquid separation and filtration mechanism includes a liquid separation shell, a water storage tank installed on the top of the liquid separation shell, a spray head connected to the water storage tank via a pipeline, the spray head being installed on the top of the inner wall of the liquid separation shell, the liquid separation shell being connected to the air outlet of the horizontal cylindrical body via a pipeline, and a purified gas outlet and a liquid outlet being provided from top to bottom on the side of the liquid separation shell away from the horizontal cylindrical body, the purified gas outlet being connected to the circulating air inlet of the tunnel kiln.

3. A tunnel kiln flue gas treatment device for calcium-magnesia brick refractory material according to claim 2, characterized in that: Each of the brush heads has a trapezoidal side, and the large end face of the brush moves against the end face of the filter screen. One of the brushes moves against the edge gap between the horizontal cylindrical body and the filter screen.

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