Double-helix composite cracking equipment for waste tires

Abstract

The invention relates to the technical field of waste tire treatment, in particular to waste tire double-helix composite cracking equipment which comprises an outer shell with a discharging pipe and an inner shell with a feeding port, the inner shell is fixedly installed in the outer shell, and the tail end of the inner shell is communicated with the discharging pipe; according to the equipment, cracking is completed through double reaction cavities of the inner shell and the outer shell, and the spiral conveying stroke is not very long, so that the spiral length is shorter, the longitudinal occupied space is small, and the cracking reaction efficiency and effect are optimized; the holes evenly distributed in the inner shell can enable cracking gas to make more sufficient contact with large materials in the inner shell, meanwhile, the large materials and the small materials are separated in the cracking process, the separated materials are further cracked in the respective reaction cavities, and therefore the cracking reaction is rapid and sufficient; through the design of the taper shaft, two effects are achieved: firstly, materials after reaction can be extruded and crushed to a certain extent, so that the separation treatment of the materials in the subsequent process is facilitated;

Description

Technical Field

[0001] The invention relates to the technical field of waste tire treatment, in particular to a double-helix composite pyrolysis device for waste tires. Background Art

[0002] The overall recycling process of waste tires includes wire drawing, crushing, cracking, magnetic separation, etc. The cracking of waste tire particles is completed in a cracking furnace, which heats the tire particles at high temperatures to decompose them into carbon black, combustible gas, oil, etc.

[0003] In the waste tire pyrolysis process, the pyrolysis process takes place in a pyrolysis chamber of a special equipment. The waste tires are pyrolyzed by the combined action of microwaves and pyrolysis gas. The products after the tire pyrolysis enter the discharging system for gas-solid separation, and the pyrolysis gas, pyrolysis oil, pyrolysis carbon black, etc. are separated. The heated pyrolysis gas can be recycled, and the pyrolysis oil and pyrolysis carbon black are further processed to obtain marketable finished products. Currently known pyrolysis equipment is generally designed with only one reaction chamber, and the tire pyrolysis treatment is completed by transporting and reacting the waste in the reaction chamber.

[0004] Single-chamber cracking equipment has obvious disadvantages. For example, during the cracking reaction, the reaction between the equipment and the waste is not sufficient and the reaction efficiency is low. The main solution to this problem is to increase the length of the reaction chamber, but this design will occupy more floor space vertically, so there is still room for improvement. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art such as insufficient cracking reaction, low efficiency and large floor space, and to propose a double-helix composite cracking device for waste tires.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: Design a double-helix composite pyrolysis equipment for waste tires, including: An outer shell having a discharge pipe and an inner shell having a feed inlet, wherein the inner shell is fixedly mounted in the outer shell, and the tail end of the inner shell is connected to the discharge pipe; A main spiral rotates inside the inner shell, a secondary spiral rotates between the outer shell and the inner shell, the secondary spiral is located below the main spiral, and a plurality of holes are evenly distributed on the inner shell.

[0007] Furthermore, the feed port is located above the inner shell and passes through the outer shell, and the feed port is located on a side of the main spiral away from the discharge pipe.

[0008] Furthermore, a connecting pipe penetrating the outer shell is installed on the inner shell, and a microwave device is fixed on the top of the connecting pipe.

[0009] Furthermore, two supporting parts are arranged inside the discharge pipe, one end of the main spiral and the auxiliary spiral rotates with the two supporting parts, and the other end passes through the outside of the outer shell.

[0010] Furthermore, two support frames are installed on the outer side of the outer shell, and one end of the main spiral and the auxiliary spiral penetrates the outer shell and is rotatably connected to the two support frames.

[0011] Furthermore, the main helix and the secondary helix have the same geometric shape, and the main helix is ​​larger than the secondary helix.

[0012] Furthermore, the main screw includes a shaft body and blades; Wherein, the shaft body includes a round rod segment and a tapered shaft with a diameter gradually increasing along the tail end of the round rod segment, the round rod segment is close to the feed port, and the tapered shaft is close to the discharge pipe.

[0013] Furthermore, a matching plate is fixedly installed below the inner shell and close to the discharge pipe, and the tapered axis of the secondary spiral is located between the matching plate and the outer shell.

[0014] Furthermore, the outsides of the outer shell and the inner shell are both connected with air pipes, the air pipe of the inner shell passes through the outer shell, and the air pipe is used to connect to an external gas input device.

[0015] Furthermore, a heat insulating layer is wrapped on the outside of the outer shell.

[0016] The double-helix composite pyrolysis equipment for waste tires proposed by the present invention has the following beneficial effects: The device uses double reaction chambers of the inner shell and the outer shell for cracking. The spiral conveying stroke does not need to be very long to complete the cracking. Therefore, the spiral length is shorter, the vertical space occupied is small, and the cracking reaction efficiency and effect are optimized. The evenly distributed holes on the inner shell can make the high-temperature cracking gas or high-temperature inert gas contact with the bulk material in the inner shell more fully, and at the same time, the large and small materials can be separated during the cracking process. The separated materials are further cracked in their respective reaction chambers, so the cracking reaction is fast and sufficient; The design of the tapered shaft has two functions: first, it can extrude and crush the reacted materials to a certain extent, which is helpful for the separation and processing of materials in the subsequent process; second, the extruded materials have a certain blocking effect at the tapered shaft, which can reduce the loss of cracking gas from the end of the main spiral or the auxiliary spiral, and achieve self-sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-section structure along AA.

[0018] In the figure: 1. outer shell; 11. discharge pipe; 12. auxiliary spiral; 13. support part; 14. support frame; 15. thermal insulation layer; 2. inner shell; 21. feed inlet; 22. main spiral; 221. round rod segment; 222. tapered shaft; 23. hole; 24. connecting pipe; 25. matching plate; 26. microwave device; 3. air pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-2 This is an embodiment of the present invention. Specifically, this embodiment discloses a double-helix composite pyrolysis device for waste tires. The device uses a double reaction chamber of an inner shell 2 and an outer shell 1 for pyrolysis. The pyrolysis can be completed without a long spiral conveying stroke. Therefore, the spiral length is shorter, the longitudinal space occupied is small, and the pyrolysis reaction efficiency and effect are optimized. The composite cracking device comprises an outer shell 1 having a discharge pipe 11, and an inner shell 2 having a feed port 21, wherein the inner shell 2 is fixedly installed in the outer shell 1, and the tail end of the inner shell 2 is connected to the discharge pipe 11, that is, in this embodiment, a first reaction chamber is formed inside the inner shell 2, and a second reaction chamber is formed between the outer shell 1 and the inner shell 2, and the two reaction chambers work separately to optimize the reaction efficiency of the material; A main spiral 22 rotates inside the inner shell 2, a secondary spiral 12 rotates between the outer shell 1 and the inner shell 2, and the secondary spiral 12 is located below the main spiral 22. A plurality of holes 23 are evenly distributed on the inner shell 2. The evenly distributed holes 23 on the inner shell 2 can make the cracking gas contact with the bulk material in the inner shell 2 more fully, and at the same time, the large and small materials are separated during the cracking process. The separated materials are further cracked in their respective reaction chambers, so the cracking reaction is fast and sufficient.

[0021] In some embodiments, the feed port 21 of the present invention is located above the inner shell 2 and penetrates the outer shell 1, and the feed port 21 is located on the side of the main spiral 22 away from the discharge pipe 11. Figure 1 As shown, in this embodiment, the feed port 21 penetrates the outer shell 1 upward, and during operation, tire waste is added from the feed port 21 into the inner shell 2 for conveying reaction.

[0022] In addition, in this embodiment, a connecting pipe 24 penetrating the outer shell 1 is also installed on the inner shell 2, and a microwave device 26 is fixed on the top of the connecting pipe 24. The microwave device 26 is a prior art and will not be described in detail here. The purpose of designing the microwave device 26 is to achieve the cracking condition of the inner shell 2. Under the combined action of microwaves and heated cracking gas, the tire block undergoes a cracking reaction.

[0023] On the basis of the above-mentioned embodiment, in the present invention, two support parts 13 are arranged inside the discharge pipe 11, one end of the main spiral 22 and the auxiliary spiral 12 rotates with the two support parts 13, and the other end passes through the outside of the outer shell 1. Specifically, the support part 13 described in the present embodiment is preferably configured as an annular component. Technical personnel in the relevant field know that in order to improve the rotational stability, a bearing pair can also be installed in the annular component, and the bearing pair is connected to the end of the main spiral 22 and the auxiliary spiral 12 to reduce the rotational friction. Of course, on the basis of the above-mentioned scheme, two bearing pairs can also be arranged on the outer shell 1, and the bearing pairs are used to rotate with the other ends of the main spiral 22 and the auxiliary spiral 12 to improve the rotational stability of the main spiral 22 and the auxiliary spiral 12.

[0024] Furthermore, in the present embodiment, two support frames 14 are installed on the outer side of the outer shell 1, and one end of the main spiral 22 and the auxiliary spiral 12 penetrate the outer shell 1 and are rotatably connected to the two support frames 14. The support frame 14 in the present embodiment is arranged as a U-shaped structure. The support frame 14 can be used to realize the axial end support of the main spiral 22 and the auxiliary spiral 12, and on the other hand, it can also realize the installation support of the driving member. In the present embodiment, the driving member can be arranged as a motor. Similarly, a bearing pair can also be arranged inside the support frame 14 to enhance the support and rotation stability of the main spiral 22 and the auxiliary spiral 12.

[0025] It should be noted that, in this embodiment, the main helix 22 and the secondary helix 12 have the same geometric shape, and the size of the main helix 22 is larger than that of the secondary helix 12 .

[0026] Specifically, the main spiral 22 in this embodiment includes a shaft body and blades; Among them, the shaft body includes a round rod segment 221 and a tapered shaft 222 whose diameter gradually increases along the tail end of the round rod segment 221. The round rod segment 221 is close to the feed port 21, and the tapered shaft 222 is close to the discharge pipe 11. In this embodiment, the blades do not change with the outer diameter of the shaft body, that is, the outer circumference of the entire blade is consistent.

[0027] Similarly, the auxiliary spiral 12 described in this embodiment also includes a round rod segment 221 and a tapered shaft 222 whose diameter gradually increases along the tail end of the round rod segment 221. The round rod segment 221 is close to the feed port 21, and the tapered shaft 222 is close to the discharge pipe 11. Its structure is the same as that of the main spiral 22. However, since the auxiliary spiral 12 described in this embodiment is aimed at smaller waste materials, its size can be designed to be smaller than the main spiral 22.

[0028] In this embodiment, the design of the tapered shaft 222 has two functions: first, it can extrude and crush the reacted materials to a certain extent, which is helpful for the separation and processing of the materials in the subsequent process; second, the extruded materials have a certain blocking effect at the tapered shaft 222, which can reduce the loss of cracking gas from the end of the main spiral 22 or the auxiliary spiral 12.

[0029] Considering the need to adapt the tail end of the auxiliary spiral 12, a matching plate 25 is fixedly installed below the inner shell 2 and close to the discharge pipe 11 in the present invention, and the tapered axis 222 of the auxiliary spiral 12 is located between the matching plate 25 and the outer shell 1.

[0030] Furthermore, in this embodiment, the outer parts of the outer shell 1 and the inner shell 2 are both connected with an air pipe 3. The air pipe 3 of the inner shell 2 runs through the outer shell 1. The air pipe 3 is used to connect to an external gas input device. The gas input device is used to input cracking gas, which can be heated inert gas for the first time. Under the combined action of microwaves and heated cracking gas, the tire block undergoes a cracking reaction.

[0031] On the basis of the above embodiment, in the present invention, a heat insulating layer 15 is further wrapped on the outside of the outer shell 1. The heat insulating layer 15 can be set to a foam material, or can be set to a material such as glass wool. The specific selection can be adaptively made by technical personnel in the relevant field. The design of the heat insulating layer 15 can be used to improve the thermal insulation performance of the entire equipment, avoid excessive heat loss and cause excessive energy consumption.

[0032] When working, first connect the power supply of the equipment, connect the heated cracking gas through the air pipe 3, and the heated inert gas can be used for the first time, enter the inner shell 2 of the outer shell 1, turn on the microwave device 26, and when the cracking conditions are reached in the shell, add the waste tire block from the feed port 21 to the front end of the main spiral 22. Under the combined action of microwave and heated cracking gas, the tire block undergoes cracking reaction, and the block is slowly transported forward by the spiral while reacting. During the transportation process, a part of the product with a smaller volume after the reaction falls from the hole 23 on the inner shell 2 to the outer shell 1 of the secondary spiral 12 below. The part of the product that is not fully cracked will continue to undergo cracking reaction in the shell below. When the material is transported to the end of the spiral, it has been completely cracked. At this time, the tapered shaft 222 at the end squeezes the cracked product into the discharge pipe 11 to enter the next process.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-helix composite pyrolysis device for waste tires, characterized in that: include: An outer shell (1) having a discharge pipe (11), and an inner shell (2) having a feed port (21), wherein the inner shell (2) is fixedly mounted in the outer shell (1), and the rear end of the inner shell (2) is in communication with the discharge pipe (11); A main spiral (22) rotates inside the inner shell (2), a secondary spiral (12) rotates between the outer shell (1) and the inner shell (2), the secondary spiral (12) is located below the main spiral (22), and a plurality of holes (23) are evenly distributed on the inner shell (2).

2. The double-helix composite pyrolysis equipment for waste tires according to claim 1, characterized in that: The feed inlet (21) is located above the inner shell (2) and passes through the outer shell (1); the feed inlet (21) is located on a side of the main spiral (22) away from the discharge pipe (11).

3. The double-helix composite pyrolysis equipment for waste tires according to claim 1, characterized in that: A connecting pipe (24) penetrating the outer shell (1) is also mounted on the inner shell (2), and a microwave device (26) is fixed to the top of the connecting pipe (24).

4. The double-helix composite pyrolysis equipment for waste tires according to claim 1, characterized in that: Two support parts (13) are arranged inside the discharge pipe (11); one end of the main spiral (22) and the auxiliary spiral (12) rotates with the two support parts (13), and the other end penetrates the outside of the outer shell (1).

5. The double-helix composite pyrolysis equipment for waste tires according to claim 3 is characterized in that: Two support frames (14) are also installed on the outside of the outer shell (1), and one end of the main spiral (22) and the auxiliary spiral (12) penetrates the outer shell (1) and is rotatably connected to the two support frames (14).

6. The double-helix composite pyrolysis equipment for waste tires according to claim 1, characterized in that: The main helix (22) has the same geometric shape as the secondary helix (12), and the size of the main helix (22) is larger than that of the secondary helix (12).

7. The double-helix composite pyrolysis equipment for waste tires according to claim 6, characterized in that: The main spiral (22) comprises a shaft body and blades; The shaft body comprises a round rod segment (221) and a tapered shaft (222) whose diameter gradually increases along the tail end of the round rod segment (221); the round rod segment (221) is close to the feed port (21), and the tapered shaft (222) is close to the discharge pipe (11).

8. The double-helix composite pyrolysis equipment for waste tires according to claim 7, characterized in that: A matching plate (25) is fixedly installed below the inner shell (2) and close to the discharge pipe (11), and the tapered axis (222) of the secondary spiral (12) is located between the matching plate (25) and the outer shell (1).

9. The double-helix composite pyrolysis equipment for waste tires according to claim 1, characterized in that: The outsides of the outer shell (1) and the inner shell (2) are both connected to an air pipe (3); the air pipe (3) of the inner shell (2) passes through the outer shell (1); and the air pipe (3) is used to connect to an external gas input device.

10. A double-helix composite pyrolysis device for waste tires according to any one of claims 1 to 9, characterized in that: The outer portion of the outer shell (1) is also wrapped with a heat insulating layer (15).

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