Automatic unloading device for rotary kiln with self-cooling function

Abstract

An automatic unloading device for a rotary kiln with a self-cooling function includes a rotary kiln, the rotary kiln being tilted from the feed side toward the discharge side, the discharge side of the rotary kiln being provided with one or two discharge ports, the discharge ports being connected to a discharge coil disposed around the outside of the rotary kiln, the discharge coil being provided with a discharge port, the rotary kiln and the discharge coil rotating in the same direction, a first gap being provided between adjacent tubes of the discharge coil for enhancing cooling, and a second gap being provided between the discharge coil and the rotary kiln for enhancing cooling. The present invention has the advantages of fully cooling the material during the unloading process, automatically matching the discharge volume with the feed volume, and preventing air from entering the kiln interior.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon production equipment, and in particular to an automatic unloading device for a rotary kiln with a self-cooling function. Background Art

[0002] During the production of activated carbon using a rotary activation furnace, the product must be continuously discharged from the kiln to complete the unloading process. During this process, the equipment must ensure that air cannot enter through the discharge port to prevent air from reacting with the high-temperature material in the furnace, resulting in adverse consequences. Because the rotary kiln rotates continuously, achieving both continuous unloading and airtight sealing often complicates the structure, leading to frequent failures, increased costs, and impacts the normal operation of the equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic unloading device for a rotary kiln with a self-cooling function. The present invention solves the problems of the prior art by arranging a unloading coil that rotates synchronously with the rotary kiln.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic unloading device for a rotary kiln with a self-cooling function, comprising a rotary kiln, wherein the rotary kiln is inclined from the feed side to the discharge side, and the discharge side of the rotary kiln is provided with one or two discharge ports, the discharge ports are connected to the unloading coils coiled on the outside of the rotary kiln, the unloading coils are provided with unloading ports, the rotary kiln and the unloading coils rotate in the same direction, a first gap for improving the cooling effect is provided between adjacent tube bodies of the unloading coils, and a second gap for improving the cooling effect is provided between the unloading coils and the rotary kiln.

[0005] As a preferred embodiment of the present invention, the lower part of the unloading coil has a material sealing section, the axial length of the material sealing section is greater than the cross-sectional diameter corresponding to the maximum radial cross-section of the discharge port, and the material sealing section is always located at the lowest part of the unloading coil.

[0006] As a preferred embodiment of the present invention, the length of the discharge coil is less than half of the axial length of the rotary kiln, and the first gap is smaller than the second gap.

[0007] As a preferred embodiment of the present invention, the inclination angle of the rotary kiln is 1.5° to 3.4°.

[0008] As a preferred embodiment of the present invention, the discharge coil is arranged to extend from the discharge side to the feed side of the rotary kiln.

[0009] As a preferred embodiment of the present invention, the diameter of the material sealing section is smaller than or equal to the cross-sectional diameter corresponding to the maximum radial cross-section of the discharge port.

[0010] As a preferred embodiment of the present invention, the rotary kiln is provided with at least one roller on the feed side and the discharge side respectively, a rotation drive mechanism is provided between the feed side roller and the discharge side roller, and the discharge coil is fixedly connected to the rotary kiln.

[0011] As a preferred embodiment of the present invention, the feed port of the rotary kiln is connected to a screw conveyor.

[0012] As a preferred embodiment of the present invention, the diameter of the discharge coil decreases from the discharge side to the feed side of the rotary kiln.

[0013] As a preferred embodiment of the present invention, the number of winding turns of the unloading coil is equal to the number of the sealing sections.

[0014] In summary, the present invention has the following beneficial effects:

[0015] The present invention has an air-cooling effect because the discharge coil is 150-300 mm away from the outer wall of the rotary kiln and the tube bodies of the discharge coil are 60-150 mm apart. The material is cooled during the discharge process and the material temperature can be reduced by about 400 degrees, which is beneficial to the cooling of the material. Secondly, the amount of discharge varies with the rotation speed of the rotary activation furnace and is easy to match. Thirdly, the structure is simple and the operation is reliable. Fourthly, the sealing effect is good. The present invention can be used not only for activated carbon rotary activation furnaces, but also for the discharge of other rotary kilns. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 It is a front view structural schematic diagram of an embodiment of the present invention;

[0018] In the figure: 1-rotary kiln; 2-discharge port; 3-discharge coil; 4-discharge port; 5-discharge flap door; 6-flap door unloading roller; 7-flap door return spring; 8-receiving hopper; 9-first gap; 10-second gap; 11-material sealing section; 12-rotation drive mechanism; 12-1-gear ring; 12-2-drive gear; 12-3-rotation motor; 13-support rod; 14-roller; 15-screw conveyor. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 、 Figure 2As shown, this embodiment includes a rotary kiln 1, which is inclined from the feed side to the discharge side. One or two discharge ports 2 are provided on the discharge side of the rotary kiln 1, preferably one. When two are provided, the two discharge ports 2 are symmetrically arranged with the axial center line of the rotary kiln 1 as the symmetry line. The discharge port 2 is connected to the head end of a discharge coil 3 coiled on the outside of the rotary kiln 1, and the discharge coil 3 is extended from the discharge side of the rotary kiln 1 to the feed side. A discharge port 4 is provided on the tail end of the discharge coil 3, and a discharge flap door 5 is provided on the discharge port 4. One end of the discharge flap door 5 is connected to the discharge port 4 by a hinge, and the other end is provided with a flap door discharge roller 6. The discharge flap door 5 is provided with a flap door return spring 7. In the absence of external force, the discharge flap door 5 is in a closed state. A receiving hopper 8 is provided directly below the discharge port 4 when it is at the lowest position. The rotary kiln 1 rotates in the same direction as the discharge coil 3. A first gap 9 for improving the cooling effect is provided between adjacent tube bodies of the discharge coil 3. A second gap 10 for improving the cooling effect is provided between the discharge coil 3 and the rotary kiln 1. The first gap 9 and the second gap 10 increase the cooling surface area of ​​the discharge coil 3, have an air cooling effect, cool the material during the unloading process, can reduce the material temperature by about 400 degrees, which is beneficial to material cooling. The feed side referred to in this specification is the side of the rotary kiln centerline near the feed port, and the discharge side is the side of the rotary kiln centerline near the discharge port 2. During the unloading process, the material continuously moves within the discharge coil 3 as the rotary kiln 1 rotates. When the discharge port 4 of the discharge coil 3 is at the bottom, the material also moves to the discharge port 4. At this time, the flap discharge roller 6 on the discharge flap 5 contacts the upper edge of the receiving hopper 8, causing the flap 5 to open and the material to flow from the discharge coil 3 into the receiving hopper. As the rotary kiln 1 continues to rotate, when the flap 5 passes the receiving hopper 8, the flap return spring 7 closes the flap 5, completing one discharge cycle. This process repeats, with one discharge cycle occurring with each rotation. The rotary kiln 1 has an inclination angle of 1.5° to 3.4°, with 2° being the preferred implementation angle in this embodiment.

[0021] like Figure 1 、 Figure 2 As shown, the lower portion of the discharge coil 3 has a sealing section 11. The axial length of this section is greater than the cross-sectional diameter corresponding to the maximum radial cross-section of the discharge port 2, and this section is always located at the lowest point of the discharge coil 3. The length of the discharge coil 3 is less than half the axial length of the rotary kiln 1. The discharge coil 3 is wound from a steel pipe with a diameter of 125-200 mm. The first gap 9 is smaller than the second gap 10; specifically, the first gap 9 is 60-150 mm, and the second gap 10 is 150-300 mm. The diameter of the sealing section 11 is such that the diameter of the discharge coil 3 is less than or equal to the cross-sectional diameter corresponding to the maximum radial cross-sectional diameter of the discharge port 2, facilitating the rapid formation of the sealing section 11.

[0022] like Figure 1 、 Figure 2 As shown, the rotary kiln 1 is provided with at least one roller 14 on the feed side and the discharge side respectively, and a rotation drive mechanism 12 is provided between the feed side roller 14 and the discharge side roller 14. The rotation drive mechanism 12 includes a gear ring 12-1 arranged around the outside of the rotary kiln 1, and a driving gear 12-2 is engaged with the gear ring 12-1. The driving gear 12-2 is connected to the rotating motor 12-3. When the rotating motor 12-3 rotates, the driving gear 12-2 drives the gear ring 12-1 to rotate, thereby rotating the rotary kiln 1. The discharge coil 3 is fixed to the rotary kiln 1 through the support rod 13, that is, the discharge coil 3 rotates synchronously with the rotary kiln 1.

[0023] like Figure 1 、 Figure 2 As shown, the feed port of the rotary kiln 1 is connected to a screw conveyor 15. The number of windings of the discharge coil 3 is equal to the number of the sealing sections 11.

[0024] The diameter of the discharge coil 3 decreases from the discharge side to the feed side of the rotary kiln 1, so that the gap between the material sealing section 11 inside the discharge coil 3 and the material body from the discharge side to the feed side of the rotary kiln 1 is reduced, thereby improving the air isolation ability of the discharge coil 3 in the direction of the discharge port 4.

[0025] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic unloading device for a rotary kiln with a self-cooling function, characterized in that: The rotary kiln (1) is provided with an inclined direction from the feeding side to the discharging side, the discharging side of the rotary kiln (1) is provided with one or two discharging ports (2), the discharging ports (2) are connected with a discharge coil (3) wound around the outside of the rotary kiln (1), the discharge coil (3) is provided with a discharge port (4), the rotary kiln (1) and the discharge coil (3) rotate in the same direction, a first gap (9) for improving the cooling effect is provided between adjacent tube bodies of the discharge coil (3), and a second gap (9) for improving the cooling effect is provided between the discharge coil (3) and the rotary kiln (1). The discharge coil (3) has a sealing section (11) at its lower portion, the axial length of the sealing section (11) being greater than the cross-sectional diameter corresponding to the maximum radial cross-sectional area of ​​the discharge port (2), and the sealing section (11) being always located at the lowest portion of the discharge coil (3); the length of the discharge coil (3) being less than half the axial length of the rotary kiln (1), and the first gap (9) being less than the second gap (10); the diameter of the discharge coil (3) decreasing from the discharge side to the feed side of the rotary kiln (1); and the inclination angle of the rotary kiln (1) being 1.5° to 3.4°.

2. The automatic unloading device for a rotary kiln with a self-cooling function according to claim 1, characterized in that: The discharge coil (3) is arranged to extend from the discharge side of the rotary kiln (1) toward the feed side.

3. The automatic unloading device for a rotary kiln with a self-cooling function according to claim 1, characterized in that: The diameter of the material sealing section (11) is smaller than or equal to the cross-sectional diameter corresponding to the maximum radial cross-sectional area of ​​the material outlet (2).

4. The automatic unloading device for a rotary kiln with a self-cooling function according to claim 1, characterized in that: The rotary kiln (1) is provided with at least one roller (14) on the feed side and the discharge side, respectively; a rotation drive mechanism (12) is provided between the roller (14) on the feed side and the roller (14) on the discharge side; and the discharge coil (3) is fixedly connected to the rotary kiln (1).

5. The automatic unloading device for a rotary kiln with a self-cooling function according to claim 1, characterized in that: The feed port of the rotary kiln (1) is connected to a screw conveyor (15).

6. The automatic unloading device for a rotary kiln with a self-cooling function according to claim 1, characterized in that: The number of winding turns of the discharge coil (3) is equal to the number of the sealing sections (11).

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