Thermal cracking reaction furnace device

Abstract

The invention discloses a thermal cracking reaction furnace device, relates to the technical field of thermal cracking, particularly relates to thermal cracking of waste plastic and rubber materials, and more particularly relates to a thermal cracking reaction furnace device capable of strengthening a stirrer and completely discharging slag. An arc-shaped bottom edge protruding towards the outside of the thermal cracking reaction chamber is formed at the bottom end of the thermal cracking reaction furnace, an arc-shaped base protruding upwards towards the inside of the thermal cracking reaction chamber is arranged on the arc-shaped bottom edge, a limiting column protrudes on the arc-shaped base, and a transmission motor is arranged at the top end of the thermal cracking reaction furnace. A transmission shaft extending into the thermal cracking reaction chamber is driven, a stirrer is arranged at the bottom end of the transmission shaft, a sleeving seat is arranged at the bottom end of the transmission shaft, the sleeving seat is sleeved on a limiting column of an arc-shaped base, and the sleeving seat and the limiting column are made of materials with high wear-resisting coefficients. And the waste plastics can be uniformly heated in the thermal cracking reaction chamber.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis technology, and in particular to a pyrolysis reactor device that enhances the agitator and ensures complete slag discharge. It can be used for the pyrolysis of waste plastics and rubber materials. Background Technology

[0002] The manufacturing industries of plastic fibers and plastic products generate waste materials during production, as well as waste plastics, rubber, and household garbage collected by recycling plants. Through pyrolysis in an anaerobic or anaerobic environment, long-chain organic compounds are heated to break their molecular bonds, ultimately decomposing into smaller molecular structures as byproducts (such as fuel oil) and water. Pyrolysis technology involves feeding waste plastics into an oiling plant, where they undergo pyrolysis, vaporization, condensation, separation, and distillation to obtain plastic pyrolysis oil. This oil is then further processed through distillation and condensation to convert it into liquid or gaseous fuel oil for industrial use.

[0003] For general thermal decomposition treatment, please refer to [link / reference]. Figure 1 As shown, the waste plastic is mainly fed into the inlet of a pyrolysis reactor 20 by a feeding device 10 and enters the pyrolysis reaction chamber 21. A heating device 22 is installed on the periphery of the pyrolysis reaction chamber 21, and an oil output pipe 23 is provided at the top of the pyrolysis reaction chamber 21 to discharge the pyrolysis gas and pyrolysis oil into a fractionator. The oil is separated by fractionation. A conveying pipe 24 is provided at the bottom of the pyrolysis reaction chamber 21 to discharge the carbon black produced after the pyrolysis reaction.

[0004] Thus, by using pyrolysis technology, plastic waste is subjected to pyrolysis reaction under high temperature and oxygen-deficient conditions in a pyrolysis furnace to produce renewable energy such as fuel oil, carbon black, and gas, achieving the environmental protection goals of energy reuse and waste reduction. This is indeed the future development trend for the treatment of petrochemical waste.

[0005] To achieve better pyrolysis results, the industry typically forms an arc-shaped bottom edge 211 that is concave into the pyrolysis reaction chamber 21 at the bottom of the pyrolysis reactor 20, and installs a drive motor 25 at the top of the pyrolysis reactor 20 to drive a drive shaft 251 that extends into the pyrolysis reaction chamber 21. A stirrer 252 with a similar shape to the arc-shaped bottom edge 211 is installed at the bottom of the drive shaft 251. In this way, the stirring of the stirrer 252 can make the waste plastic uniformly heated in the pyrolysis reaction chamber 21.

[0006] However, this design has the following shortcomings:

[0007] (1) The waste plastic in the pyrolysis reactor 20 changes from solid to molten, liquid and gaseous state, which makes the agitator 252 have to cope with various changes in resistance. However, the bottom of the agitator 252 is not limited by the arc-shaped bottom edge 211, which causes the drive shaft 251 and the agitator 252 to bend and deform due to the force and shaking during the stirring process due to the increase in resistance.

[0008] (2) When the molten waste plastic gradually concentrates near the bottom of the pyrolysis reactor 20, the barrel of the pyrolysis reactor 20 and the arc-shaped bottom edge 211 form an acute angle shape, which increases the stirring resistance of the agitator 252. Furthermore, in order to achieve complete stirring without dead corners, the agitator 252 must extend the blades 253 at both ends to the inner diameter edge of the pyrolysis reactor 20. This results in the agitator 252 having a larger shaft due to the increased length of the blades 253. Consequently, the agitator 252 is more prone to bending and deformation due to greater force during stirring in the molten state.

[0009] (3) A conveying pipe 24 is provided at the bottom of the thermal decomposition reaction chamber 21 to discharge the carbon black produced after the thermal decomposition reaction. The barrel body of the thermal decomposition reaction furnace 20 and the arc-shaped bottom edge 211 form an acute angle shape, that is, the lowest point of the barrel body of the thermal decomposition reaction furnace 20 is at the acute angle part, resulting in carbon black residue at the acute angle part of the arc-shaped bottom edge 211, which makes the carbon black not discharged cleanly and leaves residue. Summary of the Invention

[0010] Therefore, based on his many years of experience in processing and manufacturing various household waste, waste plastics and waste rubber, and considering the environmental pollution caused by incineration and landfill, and the urgent need for alternative energy, the inventor of this case actively researched and improved the technology, hoping to provide a method for recycling by thermal cracking and achieving the production and collection of gas and pyrolysis oil. Through multiple trials and modifications, this invention was finally created.

[0011] The main objective of this invention is to provide a pyrolysis reactor device in which a limiting post protrudes from an arc-shaped base that extends upward toward the pyrolysis reaction chamber at the bottom of the pyrolysis reactor, the limiting post being supported by a sleeve seat of the drive shaft, and the sleeve seat and the limiting post being made of a material with a high wear resistance coefficient, thereby reducing the bending deformation of the drive shaft and the agitator due to force.

[0012] Another objective of this invention is to provide a pyrolysis reactor device in which molten waste plastic gradually concentrates near the bottom of the reactor, and the bottom of the reactor forms an arc-shaped bottom edge that bulges outward from the reactor. An arc-shaped base that bulges upward into the reactor is provided on the arc-shaped bottom edge, so that the lowest point in the reactor is located at the slag outlet at the periphery of the arc-shaped base. As a result, the molten waste plastic will move towards the lowest point due to the design of the arc-shaped bottom edge, so that the two ends of the agitator blades only need to extend beyond the lowest point, without having to extend to the inner diameter edge of the reactor, thus shortening their length. Consequently, the agitator will not bend or deform due to excessive force during stirring in the molten state.

[0013] Another object of the present invention is to provide a method in which an arc-shaped bottom edge protruding outward from the bottom of the pyrolysis reactor is formed, so that the lowest point inside the pyrolysis reactor is located at the slag outlet at the edge of the arc-shaped base, thereby creating a state in which no carbon black remains.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] The pyrolysis reactor device provided by this invention mainly consists of a pyrolysis reactor with a feed inlet leading to a pyrolysis reaction chamber. A heating device is installed on the periphery of the pyrolysis reaction chamber, and an oil output pipe is located at the top of the pyrolysis reaction chamber. A conveying pipe is located at the bottom of the pyrolysis reaction chamber. The bottom end of the pyrolysis reactor forms an arc-shaped bottom edge that protrudes outward from the pyrolysis reaction chamber. An arc-shaped base protrudes upward into the pyrolysis reaction chamber from the arc-shaped bottom edge. A limiting post protrudes from the arc-shaped base. A slag outlet is located at the bottom end of the arc-shaped bottom edge. A transmission motor is installed at the top of the pyrolysis reactor to drive a transmission shaft that extends into the pyrolysis reaction chamber. A stirrer is installed at the bottom end of the transmission shaft, and a fitting seat is installed at the bottom end of the transmission shaft. The fitting seat fits onto the limiting post of the arc-shaped base.

[0016] As a further improvement to the above technical solution, the fitting seat is made of any one of the following materials with a high wear resistance coefficient: ceramic, bearing steel, or graphite.

[0017] As a further improvement to the above technical solution, the limiting post is made of any one of the following materials with a high wear resistance coefficient: ceramic, bearing steel, or graphite.

[0018] As a further improvement to the above technical solution, the lowest point of the arc-shaped bottom edge inside the thermal cracking reactor is located at the slag outlet at the periphery of the arc-shaped base.

[0019] This invention mainly utilizes an arc-shaped bottom edge that bulges outward from the bottom of a pyrolysis reactor. An arc-shaped base that bulges upward into the pyrolysis reactor is mounted on this bottom edge. A limiting post protrudes from the arc-shaped base. A drive motor is mounted at the top of the pyrolysis reactor to drive a drive shaft that extends into the pyrolysis reactor. A stirrer is mounted at the bottom of the drive shaft, and a fitting is mounted at the bottom of the drive shaft. The fitting fits onto the limiting post of the arc-shaped base. Both the fitting and the limiting post are made of a material with a high wear resistance coefficient. Thus, by the agitation of the stirrer, the plastic waste can be uniformly heated within the pyrolysis reactor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A schematic diagram of a commonly used waste plastic pyrolysis device;

[0022] Figure 2 A three-dimensional external view of the pyrolysis reactor device of the present invention;

[0023] Figure 3 An exploded perspective view of the thermal pyrolysis reactor apparatus of the present invention;

[0024] Figure 4 A plan view of the pyrolysis reactor apparatus of the present invention;

[0025] Figure 5 A partially enlarged schematic diagram of the thermal pyrolysis reactor apparatus of the present invention;

[0026] In the diagram: 10-Feeding device; 20-Thermal cracking reactor; 21-Thermal cracking reaction chamber; 211-Arc-shaped bottom edge; 22-Heating device; 23-Oil output pipe; 24-Conveying pipe; 25-Drive motor; 251-Drive shaft; 252-Agitator; 253-Blade; 30-Thermal cracking reactor; 31-Feed inlet; 32-Thermal cracking reaction chamber; 321-Arc-shaped bottom edge; 322-Circular arc base; 323-Limiting column; 324-Slag outlet; 33-Heating device; 34-Oil output pipe; 35-Conveying pipe; 36-Drive motor; 37-Drive shaft; 371-Agitator; 372-Sleeve seat. Detailed Implementation

[0027] To achieve the above objectives, the structure and features of the present invention will be described in detail below with reference to the accompanying drawings. It is believed that this will enable a further understanding of the content of the present invention and its effects.

[0028] Please see Figure 2-5 As shown, the present invention mainly involves feeding waste plastic into a pyrolysis reactor 30 through a feeding device via the inlet 31, which then enters the pyrolysis reaction chamber 32. A heating device 33 is installed around the periphery of the pyrolysis reaction chamber 32. An oil output pipe 34 is located at the top of the pyrolysis reaction chamber 32 to discharge the pyrolysis gas and pyrolysis oil into a fractionator. The oil is then fractionated out of the chamber. A conveying pipe 35 is located at the bottom of the pyrolysis reaction chamber 32 to discharge the carbon black produced after the pyrolysis reaction. The bottom end of the pyrolysis reactor 30 forms an arc-shaped bottom edge 321 that bulges outward from the pyrolysis reaction chamber 32. A [missing information - likely a device or component] is installed on the arc-shaped bottom edge 321. An upwardly protruding arc-shaped base 322 extends into the pyrolysis reaction chamber 32. A limiting post 323 protrudes from the arc-shaped base 322. A slag outlet 324 is provided at the bottom end of the arc-shaped bottom edge 321. A drive motor 36 is provided at the top of the pyrolysis reaction furnace 30 to drive a drive shaft 37 that extends into the pyrolysis reaction chamber 32. A stirrer 371 is provided at the bottom end of the drive shaft 37. A fitting seat 372 is provided at the bottom end of the drive shaft 37. The fitting seat 372 fits onto the limiting post 323 of the arc-shaped base 322 to form a support. The fitting seat 372 and the limiting post 323 are made of materials with high wear resistance (such as ceramics, bearing steel, graphite, steel, etc.).

[0029] In this way, waste materials generated during the production process of plastic fiber and plastic product manufacturing industries, as well as waste plastics recycled by resource recycling plants, are transported from the primary pyrolysis machine to the feed port 31 on the pyrolysis reactor 30 and enter the pyrolysis reaction chamber 32. A drive motor 36 is installed at the top of the pyrolysis reactor 30, which drives the agitator 371 of the drive shaft 37 to stir at the upper edge of the arc-shaped bottom edge 321 of the pyrolysis reaction chamber 32, so that the waste plastics can be uniformly heated in the pyrolysis reaction chamber 32.

[0030] Thus, the present invention can achieve the following:

[0031] (1) A limiting post protrudes from the bottom of the thermal decomposition reactor into the arc base that extends upward toward the thermal decomposition reaction chamber. The limiting post serves as the fitting seat for the drive shaft. The fitting seat and the limiting post are made of materials with high wear resistance. This allows the waste plastic in the thermal decomposition reactor to change from solid to molten, liquid to gaseous state. The bottom of the stirrer can be limited and supported, which can cope with various changes in resistance. The fitting seat and the limiting post are made of materials with high wear resistance (such as ceramics, bearing steel, graphite, steel, etc.), which can reduce the bending deformation of the drive shaft and stirrer due to force.

[0032] (2) When the molten waste plastic gradually concentrates in the pyrolysis reactor near the bottom, the bottom of the pyrolysis reactor forms an arc-shaped bottom edge that bulges out of the pyrolysis reactor. An arc-shaped base that bulges upward into the pyrolysis reactor is set on the arc-shaped bottom edge, so that the lowest point in the pyrolysis reactor is located at the slag outlet of the arc-shaped base. As a result, the molten waste plastic will be displaced to the slag outlet at its lowest point due to the design of the arc-shaped bottom edge, so that the agitator can achieve complete stirring without dead corners. Moreover, the two ends of the agitator blades do not need to extend to the inner diameter edge of the pyrolysis reactor, and their length can be shortened. Therefore, the stirring in the molten state will not cause the agitator to bend and deform due to excessive force.

[0033] (3) A conveying pipe is provided at the bottom of the pyrolysis reaction chamber to discharge the carbon black produced after the pyrolysis reaction. The bottom of the pyrolysis reaction furnace forms an arc-shaped bottom edge that protrudes outward from the pyrolysis reaction chamber. Therefore, the lowest point inside the pyrolysis reaction furnace is located at the slag outlet at the periphery of the arc base. In this way, the carbon black can be discharged cleanly without any residue.

[0034] The above-described embodiments of the present invention are merely illustrative examples of preferred embodiments. Those skilled in the art can make various modifications and implementations, but all such modifications and implementations should be included within the spirit and scope of the present invention.

[0035] In summary, this invention, by using a limiting post to support the drive shaft's fitting seat, reduces the bending deformation of the drive shaft and agitator due to stress. Furthermore, the arc-shaped bottom edge of the pyrolysis reactor reduces the length of the agitator, preventing excessive stress and bending deformation during stirring in the molten state. The arc-shaped bottom edge also ensures that the lowest point within the pyrolysis reactor is located at the periphery of the arc-shaped base, preventing carbon black residue. The structural changes and functional improvements are undeniable. Moreover, this invention was not previously published or publicly used, thus meeting the requirements for a patent application; therefore, this patent application is filed in accordance with the law.

Claims

1. A pyrolysis reactor apparatus, mainly consisting of a feed inlet into a pyrolysis reaction chamber, wherein a heating device is provided on the periphery of the pyrolysis reaction chamber, an oil output pipe is provided at the top of the pyrolysis reaction chamber, and a conveying pipe is provided at the bottom of the pyrolysis reaction chamber, characterized in that, The bottom of the pyrolysis reactor forms an arc-shaped bottom edge that bulges outward from the pyrolysis reactor. An arc-shaped base that bulges upward into the pyrolysis reactor is provided on the arc-shaped bottom edge. A limiting post protrudes from the arc-shaped base. A slag outlet is provided at the bottom end of the arc-shaped bottom edge. A drive motor is provided at the top of the pyrolysis reactor to drive a drive shaft that extends into the pyrolysis reactor. A stirrer is provided at the bottom end of the drive shaft. A fitting seat is provided at the bottom end of the drive shaft. The fitting seat fits onto the limiting post of the arc-shaped base.

2. The pyrolysis reactor apparatus according to claim 1, characterized in that, The fitting seat is made of any one of the following materials with a high wear resistance coefficient: ceramic, bearing steel, or graphite.

3. The pyrolysis reactor apparatus according to claim 1, characterized in that, The limiting post is made of any one of the following materials with a high wear resistance coefficient: ceramic, bearing steel, or graphite.

4. The pyrolysis reactor apparatus according to claim 1, characterized in that, The lowest point of the arc-shaped bottom edge inside the pyrolysis reactor is located at the slag outlet at the periphery of the arc-shaped base.

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