Plasma heat preservation device for discharging pipe of calcining furnace and calcining furnace

Abstract

According to the plasma heat preservation device for the discharging pipe of the calcining furnace and the calcining furnace, the discharging pipe in the front-back direction is arranged on a calcining furnace body, and the plasma heat preservation device is arranged at the position of the discharging pipe. The plasma heat preservation device is provided with a bottom sliding rail, a side sliding rail is arranged on the side of the bottom sliding rail, the bottom sliding rail and the side sliding rail are arranged in the front-back direction, the front portions, the middle portions and the rear portions of the bottom sliding rail and the side sliding rail correspond to the front portion, the middle portion and the rear portion of the discharging pipe respectively, a bottom heating gun is installed on the bottom sliding rail, a side heating gun is installed on the side sliding rail, and the bottom heating gun and the side heating gun are plasma spraying guns. An operator uses the bottom heating gun and the side heating gun to heat the discharging pipe respectively, so that the temperature of the discharging pipe is increased, the temperature of molten aluminum is reduced slowly when the molten aluminum flows out of the discharging pipe forwards, and the bottom heating gun and the side heating gun preserve heat of the molten aluminum in the discharging pipe in this way. And as the temperature of the molten aluminum drops slowly, the first molten aluminum cannot be solidified on the pipe wall of the discharging pipe, and follow-up molten aluminum flowing cannot be hindered.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma heat preservation, in particular to a plasma heat preservation device for the discharge pipe of a calciner and a calciner. Background Art

[0002] Aluminum product manufacturers generally use calciners to calcine materials such as aluminum ash and aluminum slag into molten aluminum. The molten aluminum flows forward from the discharge pipe of the calciner into a mold outside the furnace and forms aluminum products with specific shapes after cooling. Since the discharge pipe of the calciner is close to the external environment, the temperature is relatively low, and its front part is closest to the external environment with the lowest temperature. Therefore, when the molten aluminum flows forward from the discharge pipe, the temperature drops rapidly, which easily causes the leading molten aluminum to directly solidify on the inner wall of the discharge pipe, hindering the flow of subsequent molten aluminum. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a plasma heat preservation device for the discharge pipe of a calciner. This heat preservation device keeps the molten aluminum in the discharge pipe warm, so that when the molten aluminum flows forward from the discharge pipe, the temperature drops slowly, and the leading molten aluminum will not solidify on the inner wall of the discharge pipe, thus not hindering the flow of subsequent molten aluminum.

[0004] The utility model also provides a calciner. This calciner has a heat preservation device to keep the molten aluminum in the discharge pipe warm, so that when the molten aluminum flows forward from the discharge pipe, the temperature drops slowly, and the leading molten aluminum will not solidify on the inner wall of the discharge pipe, thus not hindering the flow of subsequent molten aluminum.

[0005] To solve the above technical problem, the plasma heat preservation device for the discharge pipe of the calciner of the utility model is provided with a bottom slide rail located below the discharge pipe of the calciner in the front-back direction. A side slide rail is provided on the side of the bottom slide rail. Both the bottom slide rail and the side slide rail are in the front-back direction, and their front, middle, and rear parts respectively correspond to the front, middle, and rear parts of the discharge pipe. A bottom heating gun that can slide back and forth along the bottom slide rail is installed on the bottom slide rail, and a side heating gun that can slide back and forth along the side slide rail is installed on the side slide rail. Both the bottom heating gun and the side heating gun are plasma spray guns. The muzzle of the bottom heating gun faces upward and is aligned with the bottom of the discharge pipe, and the muzzle of the side heating gun inclines towards the side close to the bottom heating gun to align with the side of the discharge pipe. The bottom heating gun and the side heating gun heat the discharge pipe respectively to keep the molten aluminum in the discharge pipe warm in this way.

[0006] Furthermore, an arc-shaped guide rail located on the side of the discharge pipe and concentric with the cylindrical discharge pipe is provided. The side slide rail is installed at the lower part of the arc-shaped guide rail. The side heating gun specifically aligns with the lower part of the side of the discharge pipe, and the side slide rail can drive the side heating gun to swing upward along the arc-shaped guide rail so that the muzzle of the side heating gun aligns with the middle part of the side of the discharge pipe.

[0007] Further, a side gun driving mechanism for driving the side heating gun to slide back and forth along the side slide rail is provided; a side slide rail driving mechanism for driving the side slide rail to swing upward along the arc-shaped guide rail is provided.

[0008] Further, the side slide rail driving mechanism includes a driving motor, a connecting rope is wound around the driving shaft of the driving motor, the end of the connecting rope is connected downward to the side slide rail, and the side slide rail is suspended in this way. The driving shaft of the driving motor rotates to wind up the connecting rope, and the side slide rail is driven to swing upward along the arc-shaped guide rail in this way.

[0009] Further, the side slide rail, the side heating gun, the side gun driving mechanism, the arc-shaped guide rail and the side slide rail driving mechanism form a heating unit. The device has two heating units, left and right, which are respectively located on the left and right sides of the bottom slide rail.

[0010] Further, a bottom gun driving mechanism for driving the bottom heating gun to slide back and forth along the bottom slide rail is provided; a side gun driving mechanism for driving the side heating gun to slide back and forth along the side slide rail is provided.

[0011] Further, temperature sensors are provided at the front and rear ends of the discharge pipe.

[0012] A calcining furnace, the furnace body of which is provided with a discharge pipe in the front-back direction, and the plasma heat preservation device as described above is provided at the discharge pipe.

[0013] The operator uses the bottom heating gun and the side heating guns to heat the discharge pipe respectively, so that the temperature of the discharge pipe rises. Therefore, when the molten aluminum flows forward from the discharge pipe, the temperature drops slowly. The bottom heating gun and the side heating guns keep the molten aluminum in the discharge pipe warm in this way. Since the temperature of the molten aluminum drops slowly, the leading molten aluminum will not solidify on the inner wall of the discharge pipe, thus not hindering the flow of the subsequent molten aluminum.

[0014] The operator can adjust the positions of the bottom heating gun and the side heating guns according to the actual situation. Initially, the temperature at the front end of the discharge pipe is significantly lower than that at the rear end. The operator slides the bottom heating gun forward to the front part of the bottom slide rail and slides the side heating gun forward to the front part of the side slide rail, and uses the bottom heating gun and the side heating guns to heat the front part of the discharge pipe respectively to achieve local heating of the discharge pipe. After heating for a period of time, the temperature difference between the front and rear ends of the discharge pipe is not large. The operator keeps the bottom heating gun heating the front part of the discharge pipe, slides the side heating gun backward to the middle or rear part of the side slide rail, and uses the side heating gun to heat the middle or rear part of the discharge pipe to achieve uniform heating of the discharge pipe. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the discharge pipe and the plasma heat preservation device. In the figure, the bottom heating gun and two side heating guns heat the front, middle and rear parts of the discharge pipe respectively.

[0016] Figure 2 It is the front view of the discharge pipe and the plasma heat preservation device. In the figure, the bottom heater and two side heating guns respectively heat the front part of the discharge pipe.

[0017] Figure 3 It is a schematic diagram of the discharge pipe and the plasma heat preservation device. In the figure, the bottom heater and two side heating guns respectively heat the front part of the discharge pipe.

[0018] Figure 4 It is the front view of the discharge pipe and the plasma heat preservation device. In the figure, the bottom heater and two side heating guns respectively heat the front part of the discharge pipe. Specific embodiments

[0019] The present invention will be further described in detail below in conjunction with specific embodiments.

[0020] A calcining furnace, the furnace body of which (not shown in the figure) is provided with a cylindrical discharge pipe 100 in the front-rear direction, see Figure 1 、 Figure 2 , and a plasma heat preservation device 200 is provided at the discharge pipe 100. The plasma heat preservation device 200 includes a base 1, on which a first linear module 2 in the front-rear direction is installed. The first linear module 2 includes a bottom mounting plate 21 in the front-rear direction. A bottom slide rail 22 in the front-rear direction is installed on the bottom mounting plate 21, and a bottom slider 23 is installed on the bottom slide rail 22. The first linear module 2 further includes a bottom slider driving motor 24 and an existing first screw-nut mechanism (not shown in the figure). The bottom slider driving motor 24 is installed on the bottom mounting plate 21 and is drivingly connected to the bottom slider 23 through the first screw-nut mechanism to drive the bottom slider 23 to slide back and forth along the bottom slide rail 22. Both the base 1 and the first linear module 2 are located below the discharge pipe 100. The front part 221, middle part 222, and rear part 223 of the bottom slide rail 22 of the first linear module 2 respectively correspond to the front part 101, middle part 102, and rear part 103 of the discharge pipe 100. A bottom heating gun 25 is installed on the bottom slider 23. The bottom heating gun 25 is an existing plasma spray gun, and the muzzle of the bottom heating gun 25 faces upward and is aligned with the bottom 104 of the discharge pipe 100. The bottom slider driving motor 24 and the first screw-nut mechanism form a bottom gun driving mechanism 26, and indirectly drive the bottom heating gun 25 to slide back and forth along the bottom slide rail 22 by driving the bottom slider 23 to slide back and forth along the bottom slide rail 22.

[0021] The plasma heat preservation device 200 is respectively provided with two left and right heating units 3 and 4 on the left and right sides of the bottom slide rail 22. The left and right two heating units 3 and 4 are symmetric in structure. In this embodiment, the right heating unit 4 is taken as an example for detailed description.

[0022] The right heating unit 4 includes three arc-shaped guide rails 41, namely a front one, a middle one, and a rear one, which are installed on the substrate 1. The three arc-shaped guide rails 41 are all located on the right side of the discharge pipe 100 and are concentric with the discharge pipe 100. At the lower parts 411 of the three arc-shaped guide rails 41, a front slider 42, a middle slider 42, and a rear slider 42 are respectively installed. The three sliders 42 can slide upward along the three arc-shaped guide rails 41 respectively. The right heating unit 4 includes a mounting block 43, and the three sliders 42 are mounted together through the mounting block 43. The right heating unit 4 includes a second linear module 5 in the front-rear direction. The second linear module 5 includes side mounting plates 51 in the front-rear direction. On the side mounting plates 51, side slide rails 52 in the front-rear direction are installed. On the side slide rails 52, side sliders 53 are installed. The second linear module 5 further includes a side slider driving motor 54 and an existing second lead screw nut mechanism (not shown in the figure). The side slider driving motor 54 is installed on the side mounting plate 51 and is drivingly connected to the side slider 53 through the second lead screw nut mechanism to drive the side slider 53 to slide back and forth along the side slide rail 52. The side mounting plates 51 are installed on the three sliders 42, and the side slide rails 52 on the side mounting plates 51 are indirectly installed at the lower parts of the three arc-shaped guide rails 41 in this way and are located on the right side of the discharge pipe 100. The front part 521, the middle part 522, and the rear part 523 of the side slide rail 52 respectively correspond to the front part 101, the middle part 102, and the rear part 103 of the discharge pipe 100. A side heating gun 55 is installed on the side slider 53. The side heating gun 55 is an existing plasma spray gun, and the muzzle of the side heating gun 55 is inclined leftward and upward and is aligned with the lower part of the right side part 106 of the discharge pipe 100. The side slider driving motor 54 and the second lead screw nut mechanism form a side gun driving mechanism 56. The side gun driving mechanism 56 indirectly drives the side heating gun 55 to slide back and forth along the side slide rail 52 by driving the side slider 53 to slide back and forth along the side slide rail 52. The right heating unit 4 includes a side slide rail driving mechanism 57. The side slide rail driving mechanism 57 includes a support frame 44 and a side slide rail driving motor 45 located on the right side of the support frame 44. The top of the support frame 44 is located at the upper right of the slider 42 and is rotatably installed with a fixed pulley 46. The driving shaft 451 of the side slide rail driving motor 45 extends forward and is wound with a connecting rope 47. The end 471 of the connecting rope 47 first extends leftward and upward, bypasses the fixed pulley 46, and then extends leftward and downward to connect the mounting block 43, thereby indirectly connecting the three sliders 42 and the side slide rail 52, and suspending the three sliders 42 and the side slide rail 52 in this way.

[0023] The left heating unit 3 and the right heating unit 4 are structurally symmetrical left and right, and will not be elaborated here.

[0024] See Figure 1 、 Figure 2, usually, the muzzles of the left and right side heating guns 55 of the two heating units 3 and 4 are aligned with the lower parts of the left and right side portions 105 and 106 of the discharge pipe 100. The operator can operate the side slide rail drive motor 45 of the right heating unit 4 to rotate its drive shaft 451 to roll up the connecting rope 47 and drive the mounting block 43 to move upward. Then, the mounting block 43 drives the three sliding blocks 42 to slide upward along the three arc-shaped guide rails 41 respectively, driving the side slide rail 52 to drive the side heating gun 55 to swing upward along the arc-shaped guide rail 41 to the upper part 412 of the arc-shaped guide rail 41, as Figure 3 and Figure 4 shown, so that the muzzle of the side heating gun 55 faces left and is aligned with the middle part of the right side portion 106 of the discharge pipe 100. Similarly, the operator can adjust the side heating gun 55 of the left heating unit 3 to face right and be aligned with the middle part of the left side portion 105 of the discharge pipe 100 in the same way.

[0025] See Figure 1 and Figure 2 , the operator uses the bottom heating gun 25 and the side heating gun 55 to heat the discharge pipe 100 respectively, so that the temperature of the discharge pipe 100 rises. Therefore, when the molten aluminum flows forward from the discharge pipe 100, the temperature drops slowly. The bottom heating gun 25 and the side heating gun 55 keep the molten aluminum in the discharge pipe 100 warm in this way. Since the temperature of the molten aluminum drops slowly, the leading molten aluminum will not solidify on the wall of the discharge pipe 100, thus not hindering the flow of the subsequent molten aluminum.

[0026] See Figure 1 and Figure 2 , the front end 107 of the discharge pipe 100 is closest to the outside furnace environment and has the lowest temperature, while the rear end 108 of the discharge pipe 100 is closest to the furnace body and has the highest temperature. The plasma heat preservation device 200 includes temperature sensors 5 provided at the front and rear ends 107 and 108 of the discharge pipe 100 (only one temperature sensor is shown in the figure due to the viewing angle). The operator adjusts the positions of the bottom heating gun 25 and the side heating gun 55 according to the detection results of the temperature sensors 5 according to the actual situation.

[0027] See Figure 3 and Figure 4, initially, the temperature sensor 5 detects that the temperature at the front end 107 of the discharge pipe 100 is significantly lower than that at the rear end 108. Then, the operator uses the bottom heating gun 25 and the side heating gun 55 to locally heat the discharge pipe 100. The operations are as follows: Let the bottom gun driving mechanism 26 drive the bottom heating gun 25 to slide forward along the bottom slide rail 22 to the front part 221 of the bottom slide rail 22, and use the bottom heating gun 25 to heat the bottom of the front part 101 of the discharge pipe 100; adjust the side heating gun 55 of the right heating unit 4 to face left and aim at the middle of the right side part 106 of the discharge pipe 100, let the side gun driving mechanism 56 of the right heating unit 4 drive the side heating gun 55 to slide forward along the side slide rail 52 to the front part 521 of the side slide rail 52, and use the side heating gun 55 of the right heating unit 4 to heat the right side part of the front part 101 of the discharge pipe 100; adjust the side heating gun 55 of the left heating unit 3 to face right and aim at the middle of the left side part 105 of the discharge pipe 100, let the side gun driving mechanism 56 of the left heating unit 3 drive the side heating gun 55 to slide forward along the side slide rail 52 to the front part 521 of the side slide rail 52, and use the side heating gun 55 of the left heating unit 3 to heat the left side part of the front part 101 of the discharge pipe 100.

[0028] See Figure 1 and Figure 2 , after heating for a period of time, the temperature sensor 5 detects that the temperature difference between the front and rear ends 107 and 108 of the discharge pipe 100 is not significant. Then, the operator uses the bottom heating gun 25 and the side heating gun 55 to uniformly heat each part of the discharge pipe 100: Let the bottom heating gun 25 continue to heat the front part 101 of the discharge pipe 100; adjust the side heating gun 55 of the right heating unit 4 to face left - upper and aim at the lower part of the right side part 106 of the discharge pipe 100, let the side gun driving mechanism 56 of the right heating unit 4 drive the side heating gun 55 to slide along the side slide rail 52 to the middle part 522 of the side slide rail 52, and use the side heating gun 55 of the right heating unit 4 to heat the middle part 102 of the discharge pipe 100; adjust the side heating gun 55 of the left heating unit 3 to face right - upper and aim at the middle of the left side part 105 of the discharge pipe 100, let the side gun driving mechanism 56 of the left heating unit 3 drive the side heating gun 55 to slide along the side slide rail 52 to the rear part 523 of the side slide rail 52, and use the side heating gun 55 of the left heating unit 3 to heat the rear part 103 of the discharge pipe 100. The plasma heat - preservation device 200 realizes uniform heating of each part of the discharge pipe 100 in the above - mentioned manner.

[0029] As described above, it is only the implementation manner of the present invention, and does not limit the scope of patent protection. Those skilled in the art make non - substantial changes or substitutions based on the present invention, and still fall within the scope of patent protection.

Claims

1. Plasma insulation device for the discharge pipe of a calciner, characterized in that: There is a bottom slide rail located below the calciner discharge pipe in the front-rear direction. A side slide rail is provided on the side of the bottom slide rail. Both the bottom slide rail and the side slide rail are in the front-rear direction, and their front, middle, and rear parts respectively correspond to the front, middle, and rear parts of the discharge pipe. A bottom heating gun that can slide back and forth along the bottom slide rail is installed on the bottom slide rail, and a side heating gun that can slide back and forth along the side slide rail is installed on the side slide rail. Both the bottom heating gun and the side heating gun are plasma spray guns. The muzzle of the bottom heating gun faces upward and is aligned with the bottom of the discharge pipe, and the muzzle of the side heating gun inclines toward the side close to the bottom heating gun so as to be aligned with the side of the discharge pipe. The bottom heating gun and the side heating gun respectively heat the discharge pipe, and in this way, heat preservation is carried out for the molten aluminum in the discharge pipe.

2. The heat preservation device according to claim 1, wherein: There is an arc-shaped guide rail located on the side of the discharge pipe and concentric with the cylindrical discharge pipe. The side slide rail is installed at the lower part of the arc-shaped guide rail. The side heating gun specifically aims at the lower part of the side of the discharge pipe. The side slide rail can drive the side heating gun to swing upward along the arc-shaped guide rail so that the muzzle of the side heating gun is aligned with the middle part of the side of the discharge pipe.

3. The thermal insulation device according to claim 2, characterized in that: There is a side gun driving mechanism for driving the side heating gun to slide back and forth along the side slide rail; there is a side slide rail driving mechanism for driving the side slide rail to swing upward along the arc-shaped guide rail.

4. The heat preservation device according to claim 3, wherein: The side slide rail driving mechanism includes a driving motor. A connecting rope is wound around the driving shaft of the driving motor. The end of the connecting rope is connected downward to the side slide rail. In this way, the side slide rail is suspended. The driving shaft of the driving motor rotates to wind up the connecting rope, and in this way, the side slide rail is driven to swing upward along the arc-shaped guide rail.

5. The heat preservation device according to claim 3, characterized in that: The side slide rail, the side heating gun, the side gun driving mechanism, the arc-shaped guide rail, and the side slide rail driving mechanism form a heating unit. There are two heating units, left and right, in this device, which are respectively located on the left and right sides of the bottom slide rail.

6. The thermal insulation device according to claim 1, characterized in that: There is a bottom gun driving mechanism for driving the bottom heating gun to slide back and forth along the bottom slide rail; there is a side gun driving mechanism for driving the side heating gun to slide back and forth along the side slide rail.

7. The thermal insulation device according to claim 1, characterized in that: It includes temperature sensors arranged at the front and rear ends of the discharge pipe.

8. A calcining furnace, the furnace body of which is provided with a discharge pipe in the front-rear direction, characterized in that: A plasma heat preservation device as described in any one of claims 1 to 7 is provided at the discharge pipe.

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