Double-helix composite cracking equipment for waste tires

Abstract

The utility model relates to the technical field of waste tire treatment, in particular to double-helix composite cracking equipment for waste tires, which comprises an outer shell and an inner shell, the outer shell is provided with a discharge pipe, the inner shell is provided with a feed port, the inner shell is fixedly mounted in the outer shell, and the tail end of the inner shell is communicated with the discharge 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 utility model relates to the technical field of waste tire treatment, in particular to a double-helix composite cracking 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. The cracking furnace heats the tire particles at high temperature 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 specialized device. The waste tires are pyrolyzed by the combined action of microwaves and pyrolysis gas. The pyrolysis products enter the discharge system for gas-solid separation, and the separation produces pyrolysis gas, pyrolysis oil, pyrolysis carbon black, etc. The heated pyrolysis gas can be recycled, and the pyrolysis oil and pyrolysis carbon black are further processed to produce marketable finished products. Currently known pyrolysis equipment generally only has a single reaction chamber, and the tire pyrolysis process is completed by transporting and reacting the waste materials 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 space vertically, so there is still room for improvement. Utility Model Content

[0005] The purpose of the utility model 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 purpose, the present invention adopts the following technical solutions:

[0007] Design a double-helix composite pyrolysis equipment for waste tires, including:

[0008] An outer shell having a discharge pipe and an inner shell having a feed port, wherein the inner shell is fixedly mounted in the outer shell, and the tail end of the inner shell is in communication with the discharge pipe;

[0009] A main spiral rotates inside the inner shell, a secondary spiral rotates between the outer shell and the inner shell, and the secondary spiral is located below the main spiral. A plurality of holes are evenly distributed on the inner shell.

[0010] 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.

[0011] 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.

[0012] Furthermore, two supporting parts are provided 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.

[0013] 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 pass through the outer shell and are rotatably connected to the two support frames.

[0014] Furthermore, the main helix and the secondary helix have the same geometric shape, and the main helix is larger than the secondary helix.

[0015] Furthermore, the main spiral includes a shaft and blades;

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Furthermore, a heat insulation layer is wrapped around the outside of the outer shell.

[0020] The double-helix composite pyrolysis equipment for waste tires proposed in this utility model has the following beneficial effects:

[0021] The device uses a double reaction chamber with an inner shell and an 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.

[0022] 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 achieve separation of large and small materials during the cracking process. The separated materials are further cracked in their respective reaction chambers, so the cracking reaction is fast and sufficient;

[0023] 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 subsequent processes; 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, thereby achieving self-sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the cross-section structure along AA.

[0026] 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 port; 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

[0027] 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.

[0028] Reference Figure 1-2 This is an embodiment of the utility model. Specifically, this embodiment discloses a double-spiral 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, so the spiral length is shorter, the longitudinal space occupied is small, and the pyrolysis reaction efficiency and effect are optimized.

[0029] The composite pyrolysis device includes an outer shell 1 having a discharge pipe 11 and an inner shell 2 having a feed port 21. 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. The two reaction chambers operate independently to optimize the reaction efficiency of the material.

[0030] A main spiral 22 rotates inside the inner shell 2, and 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. 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 cracked gas and the bulk material in the inner shell 2 more fully contact, and at the same time achieve separation of large and small materials during the cracking process. The separated materials are further cracked in their respective reaction chambers, so the cracking reaction is fast and sufficient.

[0031] In some embodiments, the feed port 21 of the present invention is located above the inner shell 2 and passes through the outer shell 1. 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.

[0032] In addition, in this embodiment, a connecting pipe 24 is installed on the inner shell 2 and passes through the outer shell 1. A microwave device 26 is fixed to 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 cracking conditions in the inner shell 2. Under the combined action of microwaves and heated cracking gas, the tire block undergoes a cracking reaction.

[0033] On the basis of the above embodiment, in the utility model, two support parts 13 are provided inside the discharge pipe 11, and 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 this embodiment is preferably set as an annular component. Those skilled in the art know that in order to improve the rotational stability, a bearing pair can also be installed in the annular component, and connected to the end of the main spiral 22 and the auxiliary spiral 12 through the bearing pair to reduce the rotational friction. Of course, on the basis of the above scheme, two bearing pairs can also be provided on the outer shell 1, and the bearing pair is used to rotate with the other end 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.

[0034] Furthermore, in this embodiment, two support frames 14 are installed on the outside of the outer shell 1. One end of the main spiral 22 and the auxiliary spiral 12 pass through the outer shell 1 and are rotatably connected to the two support frames 14. The support frame 14 in this embodiment is set as a U-shaped structure. The support frame 14 can be used to support the axial ends of the main spiral 22 and the auxiliary spiral 12. On the other hand, it can also support the installation of the driving member. In this embodiment, the driving member can be set as a motor. Similarly, a bearing pair can also be provided inside the support frame 14 to improve the support and rotation stability of the main spiral 22 and the auxiliary spiral 12.

[0035] It should be noted that, in this embodiment, the main helix 22 and the secondary helix 12 have the same geometric shape, and the main helix 22 is larger in size than the secondary helix 12 .

[0036] Specifically, the main spiral 22 in this embodiment includes a shaft and blades;

[0037] 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 change of the outer diameter of the shaft body, that is, the outer circumference length of the entire blade is consistent.

[0038] Similarly, the auxiliary spiral 12 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, but since the auxiliary spiral 12 in this embodiment is aimed at smaller waste materials, its size can be designed to be smaller than the main spiral 22.

[0039] In this embodiment, the design of the tapered shaft 222 has two functions: first, it can extrude and crush the reacted material to a certain extent, which is helpful for the separation and processing of the material in the subsequent process; second, the extruded material has 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.

[0040] Taking into account the need to adapt the tail end of the auxiliary spiral 12, in the present invention, 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 auxiliary spiral 12 is located between the matching plate 25 and the outer shell 1.

[0041] Furthermore, in this embodiment, the outer shell 1 and the inner shell 2 are both connected to the outside with an air pipe 3. The air pipe 3 of the inner shell 2 passes 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. The first use can be heated inert gas. Under the combined action of microwaves and heated cracking gas, the tire block undergoes a cracking reaction.

[0042] On the basis of the above embodiment, in the present invention, a heat insulating layer 15 is further wrapped around the outside of the outer shell 1. The heat insulating layer 15 can be set as a foam material or as 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 is used to improve the thermal insulation performance of the entire equipment, avoid excessive heat loss and the problem of excessive energy consumption.

[0043] During operation, the device is first connected to the power supply, and heated cracked gas is connected through the air pipe 3. When it is first used, heated inert gas is introduced into the outer shell 1 and the inner shell 2. The microwave device 26 is turned on. When the cracking conditions are reached in the shell, the waste tire blocks are added from the feed port 21 to the front end of the main spiral 22. Under the combined action of microwaves and heated cracked gas, the tire blocks undergo a cracking reaction. The blocks are slowly conveyed forward by the spiral while reacting. During this conveying process, a portion of the smaller products after reaction falls through the hole 23 in the inner shell 2 into the outer shell 1 of the secondary spiral 12 below. The partially cracked products 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 products into the discharge pipe 11 for the next step.

[0044] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of 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 tail 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 port (21) is located above the inner shell (2) and passes through the outer shell (1). The feed port (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) passing through 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 supporting parts (13) are provided inside the discharge pipe (11), one end of the main spiral (22) and the auxiliary spiral (12) rotates with the two supporting parts (13), and the other end passes through the outside of the outer shell (1).

5. The double-helix composite pyrolysis equipment for waste tires according to claim 3, characterized in that: Two support frames (14) are further installed on the outer side of the outer shell (1), and one end of the main spiral (22) and the auxiliary spiral (12) passes through 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 main helix (22) is larger in size than 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) includes a shaft 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 insulation layer (15).

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