Waste tire regeneration pyrolysis rotary kiln

Abstract

The invention relates to the field of tire regeneration, and provides a waste tire regeneration pyrolysis rotary kiln, which is characterized in that an inclined rotary kiln cylinder with a low left part and a high right part is arranged, a feeding mechanism is arranged at the right end of the rotary kiln cylinder for feeding, and a discharging mechanism is arranged at the left end of the rotary kiln cylinder for discharging, so that small waste tire blocks with crushed and magnetically separated steel wires are fed; the kiln can move to the left end under the action of gravity, and materials in the kiln can reach the temperature required by pyrolytic reaction through heating of the heating cover; a combustor is arranged at the bottom end of the side, close to the feeding mechanism, of the heating cover, downstream heating is achieved in cooperation with inclined arrangement, the rotary kiln barrel is provided with a spiral annular rib plate to be matched with a diffusion mechanism distributed on the inner wall of the heating cover, hot airflow in the heating cover is guided to be evenly diffused, and local overheating is prevented.

Description

Technical Field

[0001] The invention relates to the field of tire regeneration, and in particular to a waste tire regeneration pyrolysis rotary kiln. Background Art

[0002] The waste tire regeneration pyrolysis technology is a technology that converts waste tires into high value-added products such as fuel oil, carbon black and steel wire through high-temperature cracking. This technology is usually carried out in an oxygen-free or low-oxygen environment. The crushed tires or rubber blocks are heated to induce molecular decomposition to produce energy products such as fuel oil, steel wire and carbon black. Waste tires need to be pyrolyzed in a rotary kiln. The prior art patent announcement number CN104711005A discloses a waste tire thermal cracking treatment device. The patented cracking furnace is prone to uneven internal temperature, local overheating, and cannot adapt to continuous regeneration pyrolysis. Therefore, it is very important to solve this problem. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a waste tire regeneration pyrolysis rotary kiln to solve the problems of existing cracking furnaces that are prone to uneven internal temperature, local overheating, and cannot adapt to continuous regeneration pyrolysis.

[0004] Based on the above purpose, the present invention provides a waste tire regeneration pyrolysis rotary kiln, comprising a rotary kiln cylinder with a left lower and a right higher tilted arrangement, the rotary kiln cylinder is coated with a heating cover coaxial with the rotary kiln cylinder, the rotary kiln cylinder is rotatably connected to the heating cover, and the left and right ends of the rotary kiln cylinder are located outside the heating cover; a feeding mechanism and a power mechanism are arranged at the right end of the rotary kiln cylinder, and a burner is arranged at the bottom end of the heating cover close to the feeding mechanism; a discharging mechanism is arranged at the left end of the rotary kiln cylinder; left and right supporting mechanisms are arranged outside the part of the rotary kiln cylinder located outside the heating cover, and the rotary kiln cylinder is rotatably connected to the supporting mechanism; an annular rib is arranged outside the part of the rotary kiln cylinder located inside the heating cover, and the annular rib is spirally wound around the rotary kiln cylinder; a diffusion mechanism is also distributed on the inner wall of the heating cover, and the diffusion mechanism can slide laterally and has a fan to cooperate with the annular rib to diffuse the heat flow in the heating cover.

[0005] Preferably, the diffusion mechanism includes a transverse sliding rail arranged on the inner wall of the heating hood, a sliding arm is arranged inside the transverse sliding rail for transverse sliding, one end of the sliding arm extends to the inside of the heating hood and a rotating block is arranged near the annular rib, and one end of the rotating block is rotatably connected to a fan through a bearing.

[0006] Preferably, springs are arranged at the left and right ends of the slide rail, and elastic blocks in contact with the springs are arranged at the left and right sides of the slide arm.

[0007] Preferably, the feeding mechanism comprises a screw feeder connected to the right end of the rotary kiln cylinder, and a hopper is connected above the screw feeder.

[0008] Preferably, the discharging mechanism comprises a discharging cover connected to the left end of the rotary kiln cylinder, the bottom of the discharging cover is connected to a screw discharging machine for solid products, and the screw discharging machine is inclined upward to the left side.

[0009] Preferably, the power mechanism includes a driven gear sleeved outside the right end of the rotary kiln cylinder, a driving gear meshed at the bottom of the driven gear, the driving gear is rotatably set on the ground through a bracket, one end of the driving gear is fixedly connected to a rotating motor, and the output end of the rotating motor is fixedly connected to the driving gear.

[0010] Preferably, the support mechanism includes a support arranged on the ground, a support wheel is arranged on the outer shell of the rotary kiln cylinder, a support block is arranged on the top of the support, a slot matching the rotation of the support wheel is opened on the top of the support block, and two stop wheels are arranged on the support through the rotation of the bracket, and the two stop wheels are located on both sides of the support wheel for limiting.

[0011] Preferably, a smoke outlet is provided at one end of the top of the heating hood, and the heating hood is arranged on the ground through a support rod.

[0012] Preferably, convex cylinders matching the rotary kiln cylinder are provided at the left and right ends of the heating cover, the convex cylinders are communicated with the heating cover, the inner wall of the convex cylinders is rotatably connected to the rotary kiln cylinder, and the inner wall of the convex cylinders is provided with sealing gaskets.

[0013] Preferably, the inner wall of the rotary kiln cylinder is provided with lifting plates distributed in an annular manner.

[0014] Beneficial effects of the present invention: The present invention sets an inclined rotary kiln cylinder with a lower left side and a higher right side, sets a feeding mechanism for feeding at the right end of the rotary kiln cylinder, and sets a discharging mechanism for discharging at the left end, so that the small pieces of waste tires that have been crushed and magnetically separated from steel wires can be fed to the left end under the action of gravity, and heated by the heating cover so that the materials in the kiln reach the temperature required for the pyrolysis reaction; a burner is set at the bottom end of the heating cover near the feeding mechanism, and the inclined setting is used to achieve downstream heating, and the heat transfer coefficient between the kiln wall near the material inlet end and the external flue gas is high, the temperature of the material in the kiln rises rapidly, and the subsequent heating process is relatively gentle. Correspondingly, the temperature of the kiln wall near the material inlet end is also high, and as the heat exchange process with the material in the kiln proceeds, the temperature of the kiln wall gradually decreases along the axial direction, which ensures that the pyrolysis process is fully carried out. The rotary kiln cylinder is provided with a spiral annular rib plate to cooperate with the diffusion mechanism distributed on the inner wall of the heating cover to guide the hot air flow in the heating cover to diffuse evenly and prevent local overheating. The fan of the diffusion mechanism of the present invention is slidably set on the transverse sliding rail through a rotating block and a sliding arm. The sliding arm contacts the spring in the transverse sliding rail through an elastic block, so that the fan can not only rotate, but also slide back and forth horizontally, so as to diffuse the hot air flow evenly. The feeding mechanism of the present invention feeds materials into the rotary kiln cylinder through a hopper, and the discharging mechanism discharges materials into the spiral discharging machine through a discharging cover, so as to realize continuous feeding, pyrolysis and discharging, and greatly improve work efficiency. The power mechanism drives the driving gear to rotate by rotating the motor, and the driving gear drives the meshing driven gear to rotate, thereby driving the rotary kiln cylinder to rotate, realizing rotary heating for pyrolysis. The support mechanism of the present invention supports the support wheel of the rotary cylinder through a support block with a notch, and blocks the two ends of the support wheel through a blocking wheel, so as to rotate the axial limit of the rotary cylinder to ensure the stability of rotation. The heating cover of the present invention is provided with a smoke outlet for discharging smoke, and the heating cover is rotatably connected to the rotary kiln cylinder by providing a convex cylinder to ensure the stability of the rotary kiln cylinder rotation, and is sealed by a sealing gasket to ensure the gas sealing inside the heating cover. The rotary kiln cylinder is also provided with a lifting plate to turn over the material when it rotates to increase the mixing degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a front cross-sectional view of the present invention;

[0017] Figure 2 is a front cross-sectional view of the heating cover of the present invention;

[0018] Figure 3 It is a schematic diagram of the power mechanism of the present invention;

[0019] Figure 4 It is a schematic diagram of the support mechanism of the present invention;

[0020] Figure 5 It is a side cross-sectional view of the rotary kiln shell of the present invention.

[0021] The markings in the figure are:

[0022] 1-rotary kiln cylinder, 2-heating cover, 3-annular rib, 4-fan, 5-transverse slide rail, 6-slide arm, 7-rotating block, 8-spring, 9-elastic block, 10-screw feeder, 11-hopper, 12-discharging cover, 13-screw discharging machine, 14-driven gear, 15-driving gear, 16-rotating motor, 17-support, 18-support wheel, 19-support block, 20-blocking wheel, 21-smoke outlet, 22-burner, 23-convex cylinder, 24-lifting plate. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 5As shown, a waste tire regeneration pyrolysis rotary kiln comprises a rotary kiln cylinder 1 which is arranged tilted with the left side lower and the right side higher, the rotary kiln cylinder 1 is coated with a heating cover 2 coaxial therewith, the rotary kiln cylinder 1 is rotatably connected to the heating cover 2, and the left and right ends of the rotary kiln cylinder 1 are located outside the heating cover 2; a feeding mechanism and a power mechanism are arranged at the right end of the rotary kiln cylinder 1, and a burner 22 is arranged at the bottom end of the heating cover 2 near the feeding mechanism; a discharging mechanism is arranged at the left end of the rotary kiln cylinder 1; left and right supporting mechanisms are arranged outside the part of the rotary kiln cylinder 1 located outside the heating cover 2, and the rotary kiln cylinder 1 is rotatably connected to the supporting mechanisms; an annular rib plate 3 is arranged outside the part of the rotary kiln cylinder 1 located inside the heating cover 2, and the annular rib plate 3 is spirally wound around the outside of the rotary kiln cylinder 1; a diffusion mechanism is also distributed on the inner wall of the heating cover 2, and the diffusion mechanism can slide laterally and is provided with a fan 4 to cooperate with the annular rib plate 3 to diffuse the heat flow in the heating cover 2. By setting a rotary kiln cylinder 1 with a lower left side and a higher right side, a feeding mechanism is set at the right end of the rotary kiln cylinder 1 for feeding, and a discharging mechanism is set at the left end for discharging, so that the small pieces of waste tires that have been broken and magnetically separated from steel wires can be fed to the left end under the action of gravity, and heated by the heating cover 2 so that the materials in the kiln reach the temperature required for the pyrolysis reaction; a burner 22 is set at the bottom end of the heating cover 2 near the feeding mechanism, and the inclined setting is used to achieve downstream heating, and the heat transfer coefficient between the kiln wall near the material inlet end and the external flue gas is high, the temperature of the material in the kiln rises rapidly, and the subsequent heating process is relatively gentle. Correspondingly, the temperature of the kiln wall near the material inlet end is also high, and as the heat exchange process with the material in the kiln proceeds, the temperature of the kiln wall gradually decreases along the axial direction, which ensures that the pyrolysis process is fully carried out. The rotary kiln cylinder 1 is provided with a spiral annular rib 3 to cooperate with the diffusion mechanism distributed on the inner wall of the heating cover 2 to guide the hot air flow in the heating cover 2 to diffuse evenly and prevent local overheating.

[0026] The diffusion mechanism includes a transverse sliding rail 5 arranged on the inner wall of the heating cover 2, a sliding arm 6 is arranged in the transverse sliding rail 5 for transverse sliding, one end of the sliding arm 6 extends to the inside of the heating cover 2 and is provided with a rotating block 7 near the annular rib 3, and one end of the rotating block 7 is rotatably connected to a fan 4 through a bearing; springs 8 are arranged at the left and right ends of the transverse sliding rail 5, and elastic blocks 9 in contact with the spring 8 are arranged on the left and right sides of the sliding arm 6. The fan 4 of the diffusion mechanism is slidably arranged on the transverse sliding rail 5 through the rotating block 7 and the sliding arm 6, and the sliding arm 6 contacts the spring 8 in the transverse sliding rail 5 through the elastic block 9, so that the fan 4 can not only rotate, but also slide back and forth horizontally, so as to diffuse the hot air flow evenly.

[0027] The feeding mechanism includes a screw feeder 10 connected to the right end of the rotary kiln cylinder 1, and a hopper 11 is connected to the screw feeder 10 above; the discharging mechanism includes a discharging cover 12 connected to the left end of the rotary kiln cylinder 1, and the bottom of the discharging cover 12 is connected to a screw discharging machine 13 of solid products, and the screw discharging machine 13 is tilted to the upper left side; the power mechanism includes a driven gear 14 sleeved outside the right end of the rotary kiln cylinder 1, and the bottom of the driven gear 14 is meshed with a driving gear 15, and the driving gear 15 is rotatably set on the ground through a bracket, and one end of the driving gear 15 is fixedly connected to a rotating motor 16, and the output end of the rotating motor 16 is fixedly connected to the driving gear 15. The feeding mechanism feeds the screw feeder 10 into the rotary kiln cylinder 1 through the hopper 11, and the discharging mechanism discharges the material into the screw discharging machine 13 through the discharging cover 12, so that continuous feeding and pyrolysis discharging are realized, which greatly improves the work efficiency. The power mechanism drives the driving gear 15 to rotate by rotating the motor 16, and the driving gear 15 drives the meshing driven gear 14 to rotate, thereby driving the rotary kiln cylinder 1 to rotate, realizing rotary heating for pyrolysis.

[0028] The support mechanism includes a support 17 arranged on the ground, a support wheel 18 is arranged on the outer cover of the rotary kiln cylinder 1, a support block 19 is arranged on the top of the support 17, a notch is opened on the top of the support block 19 to match the rotation of the support wheel 18, and two blocking wheels 20 are arranged on the support 17 through the support bracket, and the two blocking wheels 20 are located on both sides of the support wheel 18 for limiting. The support mechanism supports the support wheel 18 of the rotary kiln cylinder 1 through the support block 19 with the notch, and blocks the two ends of the support wheel 18 through the blocking wheels 20, so that the rotary kiln cylinder 1 is rotated with axial limit, ensuring the stability of rotation.

[0029] A smoke outlet 21 is provided at one end of the top of the heating hood 2, and the heating hood 2 is set on the ground through a support rod; convex cylinders 23 matching the rotary kiln cylinder 1 are provided at the left and right ends of the heating hood 2, the convex cylinder 23 is connected to the heating hood 2, the inner wall of the convex cylinder 23 is rotatably connected to the rotary kiln cylinder 1, and a sealing gasket is provided on the inner wall of the convex cylinder 23. The inner wall of the rotary kiln cylinder 1 is provided with a material lifting plate 24 in an annular distribution. The heating hood 2 is provided with a smoke outlet 21 for discharging smoke, and the heating hood 2 is rotatably connected to the rotary kiln cylinder 1 by providing the convex cylinder 23 to ensure the stability of the rotation of the rotary kiln cylinder 1, and is sealed by a sealing gasket to ensure the gas sealing inside the heating hood 2. The rotary kiln cylinder 1 is also provided with a material lifting plate 24 to flip the material when it rotates to increase the degree of mixing.

[0030] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A waste tire regeneration pyrolysis rotary kiln, comprising a rotary kiln cylinder (1) with a left lower and a right higher tilt, characterized in that: The rotary kiln cylinder (1) is covered with a heating cover (2) coaxial therewith, the rotary kiln cylinder (1) is rotatably connected to the heating cover (2), and the left and right ends of the rotary kiln cylinder (1) are located outside the heating cover (2); a feeding mechanism and a power mechanism are arranged at the right end of the rotary kiln cylinder (1), and a burner (22) is arranged at the bottom of the heating cover (2) near the feeding mechanism; a discharging mechanism is arranged at the left end of the rotary kiln cylinder (1); the rotary kiln cylinder (1) is located at the heating cover (2 ) is provided with two left and right supporting mechanisms outside the portion outside the rotary kiln cylinder (1), and the rotary kiln cylinder (1) is rotatably connected to the supporting mechanisms; an annular rib plate (3) is provided outside the portion of the rotary kiln cylinder (1) located inside the heating cover (2), and the annular rib plate (3) is spirally wound around the rotary kiln cylinder (1); a diffusion mechanism is also distributed on the inner wall of the heating cover (2), and the diffusion mechanism can slide horizontally and is equipped with a fan (4) to cooperate with the annular rib plate (3) to diffuse the heat flow in the heating cover (2).

2. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The diffusion mechanism comprises a transverse sliding rail (5) arranged on the inner wall of the heating cover (2), a sliding arm (6) is arranged inside the transverse sliding rail (5) for transverse sliding, one end of the sliding arm (6) extends to the inside of the heating cover (2) and is provided with a rotating block (7) near the annular rib plate (3), and one end of the rotating block (7) is rotatably connected to a fan (4) via a bearing.

3. A waste tire regeneration pyrolysis rotary kiln according to claim 2, characterized in that: The transverse sliding rail (5) is provided with springs (8) at both left and right ends, and the sliding arm (6) is provided with elastic blocks (9) in contact with the springs (8) at both left and right sides.

4. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The feeding mechanism comprises a screw feeder (10) which is connected to the right end of the rotary kiln cylinder (1), and a hopper (11) is connected to the top of the screw feeder (10).

5. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The discharging mechanism comprises a discharging cover (12) connected to the left end of the rotary kiln cylinder (1), the bottom of the discharging cover (12) is connected to a screw discharging machine (13) for solid products, and the screw discharging machine (13) is arranged to be inclined upward to the left side.

6. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The power mechanism comprises a driven gear (14) sleeved on the right end of the rotary kiln cylinder (1); a driving gear (15) is meshed at the bottom of the driven gear (14); the driving gear (15) is rotatably arranged on the ground through a bracket; one end of the driving gear (15) is fixedly connected to a rotating motor (16); and the output end of the rotating motor (16) is fixedly connected to the driving gear (15).

7. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The support mechanism comprises a support (17) arranged on the ground, a support wheel (18) is arranged on the outer shell of the rotary kiln cylinder (1), a support block (19) is arranged on the top of the support (17), a slot matching the rotation of the support wheel (18) is opened on the top of the support block (19), two stop wheels (20) are arranged on the support (17) through the support bracket, and the two stop wheels (20) are located on both sides of the support wheel (18) for limiting.

8. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: A smoke outlet (21) is provided at one end of the top of the heating hood (2), and the heating hood (2) is arranged on the ground via a support rod.

9. A waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The left and right ends of the heating cover (2) are provided with convex cylinders (23) matching the rotary kiln cylinder (1); the convex cylinder (23) is connected to the heating cover (2); the inner wall of the convex cylinder (23) is rotatably connected to the rotary kiln cylinder (1); and the inner wall of the convex cylinder (23) is provided with a sealing gasket.

10. The waste tire regeneration pyrolysis rotary kiln according to claim 1, characterized in that: The inner wall of the rotary kiln cylinder (1) is provided with material lifting plates (24) distributed in an annular manner.

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