Energy-saving heating device for thermal cracking reaction furnace

Abstract

The utility model discloses a pyrolysis reaction furnace energy -conserving heating device relates to pyrolysis technical field, especially a kind of energy -conserving heating device, which is heated by large contact area, to provide large heating benefit and reduce energy consumption, it is mainly to the outside diameter of pyrolysis reaction furnace consolidation semicircular heat pipe of spiral arrangement, and a heat preservation layer is covered in heat pipe, and a heating layer is outside the heat preservation layer, and the heating layer is an electromagnetic heater, by the heating contact of semicircular heat pipe and pyrolysis reaction furnace between surface and surface, form large area complete heating, to provide large heating benefit and reduce energy consumption energy -conserving heating device.

Description

Technical Field

[0001] This utility model relates to the field of thermal pyrolysis technology, and in particular to an energy-saving heating device for a thermal pyrolysis reactor. Background Technology

[0002] Waste materials generated during the manufacturing process of plastic fibers, plastic products, and other related industries, as well as waste plastics recovered by recycling plants, are subjected to pyrolysis in an anaerobic or anaerobic environment. This process involves heating long-chain organic compounds to break their molecular bonds, ultimately decomposing them into smaller molecular structures as byproducts (such as fuel oil) and water. Pyrolysis technology involves feeding waste plastics into oiling equipment, 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] Please see Figures 1 to 3 As shown, in a typical pyrolysis process, the waste plastic is fed into the pyrolysis reaction chamber through the feed port of a pyrolysis reactor 10 by a feeding device. A heating device 11 is installed on the periphery of the pyrolysis reactor 10, and an oil output pipe 12 is provided on the upper part of the pyrolysis reactor 10 to discharge the gas and pyrolysis oil after pyrolysis. A conveying pipe 13 is provided at the bottom of the pyrolysis reactor 10 to discharge the carbon black produced after the pyrolysis reaction.

[0004] Thus, when waste plastics enter the pyrolysis reaction chamber, the plastic waste undergoes a pyrolysis reaction under high temperature and oxygen-deficient conditions in the pyrolysis furnace using pyrolysis technology. The carbon black produced after pyrolysis is discharged out of the furnace through the conveying pipe 13 at the discharge end. At this time, the oil and gas can be discharged through the oil output pipe 12 and the oil (diesel and gasoline) can be separated by fractionation. A heating device 11 is installed on the periphery of the pyrolysis reactor 10 for heating. The heating device 11 is generally wrapped with copper wire around the outer diameter of the pyrolysis reactor 10. That is, the heating device 11 and the outer diameter of the pyrolysis reactor 10 can only have point-to-point contact and heat conduction, which results in an insignificant heating effect and further increases energy consumption. Utility Model Content

[0005] Therefore, based on years of experience in processing various household waste, waste plastics, and waste rubber, and considering the environmental pollution caused by incineration and landfill, as well as the urgent need for alternative energy sources, the inventor actively researched and improved this invention to provide a device that recovers waste through pyrolysis, achieving the production and collection of gas and pyrolysis oil. Through numerous trials and modifications, this invention was finally developed. This invention utilizes a large heating contact area to provide an energy-saving heating device with high heating efficiency and reduced energy consumption.

[0006] The main objective of this invention is to provide a pyrolysis reactor by fixing a helically arranged semi-circular heat-conducting pipe to its outer diameter. The semi-circular heat-conducting pipe is sealed and fixed to the outer diameter of the pyrolysis reactor with its cross-section, so that the semi-circular heat-conducting pipe contacts the pyrolysis reactor for heat conduction. This results in complete heating of the surface-to-surface heating contact area between the semi-circular heat-conducting pipe and the pyrolysis reactor, providing an energy-saving heating device with high heating efficiency and reduced energy consumption.

[0007] Another objective of this invention is to provide an energy-saving heating device that, through the installation of an insulation layer, prevents heat from diffusing outside the machine body by blocking the heated semi-circular heat pipe, thereby saving energy consumption and achieving thermal decomposition.

[0008] To achieve the above objectives, this utility model provides an energy-saving heating device for a pyrolysis reactor. The device mainly involves feeding molten waste plastic into the inlet of a pyrolysis reactor via a conveying screw from the initial stage of the pyrolysis machine. The upper part of the pyrolysis reactor has an oil-discharge pipe for discharging the pyrolysis gas and pyrolysis oil. The bottom of the pyrolysis reactor has a conveying pipe for discharging the carbon black produced after the pyrolysis reaction. A semi-circular heat-conducting pipe arranged in a spiral pattern is fixed on the outer diameter of the pyrolysis reactor, and a heating layer is wrapped around the semi-circular heat-conducting pipe.

[0009] As a further improvement to the above technical solution, the semi-circular heat pipe is fitted with its cross-section onto the outer diameter of the pyrolysis reactor, and the semi-circular heat pipe is sealed and fixed onto the outer diameter of the pyrolysis reactor.

[0010] As a further improvement to the above technical solution, the semi-circular heat pipe is filled with a heat conduction medium.

[0011] As a further improvement to the above technical solution, the heat transfer medium can be any one of heat transfer oil, hot steam, or hot molten salt.

[0012] As a further improvement to the above technical solution, the heating layer contains an electromagnetic heater.

[0013] As a further improvement to the above technical solution, an insulation layer is provided between the semi-circular heat pipe and the heating layer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a three-dimensional schematic diagram of a commonly used pyrolysis reactor.

[0016] Figure 2 This is a plan view of a commonly used pyrolysis reactor.

[0017] Figure 3 for Figure 2 A magnified diagram of part of it.

[0018] Figure 4 This is a three-dimensional appearance diagram of the present utility model.

[0019] Figure 5 This is a three-dimensional exploded view of the present invention.

[0020] Figure 6 This is a plan view of the present invention.

[0021] Figure 7 This utility model Figure 6 A magnified diagram of part of it.

[0022] In the diagram: 10-Thermal cracking reactor; 11-Heating device; 12-Oil output pipe; 13-Conveying pipe; 20-Thermal cracking reactor; 21-Inlet; 22-Oil output pipe; 23-Conveying pipe; 24-Semi-circular heat conduction pipe; 241-Cut surface; 25-Insulation layer; 26-Heating layer. Detailed Implementation

[0023] To achieve the above objectives, the structure and features of this utility model 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 this utility model and its effects.

[0024] Please see Figures 4 to 7 As shown, this utility model mainly uses a conveying screw of a primary pyrolysis machine to feed molten waste plastic into a pyrolysis reactor 20, wherein:

[0025] A pyrolysis reactor 20 is provided. The feed inlet 21 of the pyrolysis reactor 20 is used to feed the molten waste plastic into the feed screw of the primary pyrolysis machine. The upper part of the pyrolysis reactor 20 has an oil output pipe 22 for the discharge of the gas and pyrolysis oil after pyrolysis. The bottom of the pyrolysis reactor 20 is provided with a conveying pipe 23 to discharge the carbon black produced after the pyrolysis reaction. The outer diameter of the pyrolysis reactor 20 is fixed with a helical semi-circular heat conduction pipe 24. The semi-circular heat conduction pipe 24 is attached to the outer diameter of the pyrolysis reactor 20 with its cross-section 241 and is sealed and fixed to the outer diameter of the pyrolysis reactor 20. A heat conduction medium is filled in the semi-circular heat conduction pipe 24. The heat conduction medium can be heat conduction oil, hot steam, hot molten salt, etc. The semi-circular heat conduction pipe 24 is covered with an insulation layer 25. Outside the insulation layer is a heating layer 26, which is an electromagnetic heater.

[0026] In this way, waste materials generated during the production process of plastic fiber and plastic product manufacturing industries, as well as waste plastics recovered from resource recycling plants, are heated into a fluid state by a primary pyrolysis machine and enter through the feed port 21 on the pyrolysis reactor 20. The semi-circular heat conduction pipe 24 is heated by the heating layer 25 set on the periphery of the pyrolysis reactor 20. The heat energy conducted by the heat conduction medium in the semi-circular heat conduction pipe 24 heats the temperature inside the pyrolysis reactor 20 to 300°C to 800°C. The fluid waste plastic heats the long-chain organic compounds, causing their molecular bonds to break and finally decompose into smaller molecular structures, achieving the production of gas and pyrolysis oil, which is output through the oil output pipe 22. The carbon black produced by the pyrolysis is concentrated and discharged through a conveying pipe 23.

[0027] Thus, this utility model can achieve the following:

[0028] (1) The pyrolysis reactor is fixed with a helical semi-circular heat conduction tube on its outer diameter. The semi-circular heat conduction tube is attached to the outer diameter of the pyrolysis reactor with its cut surface and is sealed and fixed to the outer diameter of the pyrolysis reactor. This allows the semi-circular heat conduction tube to contact the pyrolysis reactor with its cut surface for heat conduction, so that the semi-circular heat conduction tube and the pyrolysis reactor have a complete heating contact area between the surface and the surface, thus providing an energy-saving heating device with high heating efficiency and reduced energy consumption.

[0029] (2) By setting up the insulation layer, the semi-circular heat pipe after being heated can be blocked by the insulation layer, which can prevent heat from spreading to the outside of the machine body and save energy consumption, so as to achieve the energy-saving heating device of thermal decomposition.

[0030] The above-described present invention is merely an example of the preferred embodiment. 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.

[0031] In summary, this utility model uses a helically arranged semi-circular heat-conducting pipe fixed to the outer diameter of the pyrolysis reactor, so that the semi-circular heat-conducting pipe and the pyrolysis reactor have a complete surface-to-surface heating contact area, which provides greater heating efficiency and reduces energy consumption. Its structural changes and efficiency improvements are beyond doubt. Moreover, this utility model has not been seen in publications or publicly used before the application, and it has met the requirements for a patent application. Therefore, a patent application is filed in accordance with the law.

Claims

1. An energy-saving heating device for a pyrolysis reactor, wherein molten waste plastic is fed into the feed inlet of a pyrolysis reactor via a conveying screw of a primary pyrolysis machine; the upper part of the pyrolysis reactor has an oil discharge pipe for discharging the pyrolysis gas and pyrolysis oil; and the bottom of the pyrolysis reactor has a conveying pipe for discharging the carbon black produced after the pyrolysis reaction. The device is characterized by: The outer diameter of the pyrolysis reactor is fixed with semi-circular heat-conducting pipes arranged in a spiral shape, and a heating layer is wrapped around the semi-circular heat-conducting pipes.

2. The energy-saving heating device for the pyrolysis reactor according to claim 1, characterized in that, The semi-circular heat pipe is attached to the outer diameter of the pyrolysis reactor with its cut surface, and the semi-circular heat pipe is sealed and fixed to the outer diameter of the pyrolysis reactor.

3. The energy-saving heating device for the pyrolysis reactor according to claim 1, characterized in that, The semi-circular heat pipe is filled with a heat conduction medium.

4. The energy-saving heating device for the pyrolysis reactor according to claim 3, characterized in that, The heat transfer medium can be any one of heat transfer oil, hot steam, or hot molten salt.

5. The energy-saving heating device for the pyrolysis reactor according to claim 4, characterized in that, The heating layer contains an electromagnetic heater.

6. The energy-saving heating device for the pyrolysis reactor according to claim 1, characterized in that, An insulation layer is provided between the semi-circular heat pipe and the heating layer.

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