Pyrolysis continuous conveyor

Abstract

The utility model discloses a pyrolysis continuous conveying device relates to pyrolysis technical field, can provide oxygen -free or anaerobic operation environment and continuous feeding, discharging, its mainly in the initial section pyrolysis machine is erected with a cylindrical machine body, the machine body content is equipped with a conveying screw rod, is equipped with a feeding hopper in the machine body front section, and the machine body end is located in a feeding control valve, and the feeding control valve is connected with a discharge pipe, and the discharge pipe links a feeding port of pyrolysis reaction furnace, can melt plastic waste into pyrolysis reaction chamber, and the heating device is arranged on the periphery of pyrolysis reaction chamber, and the upper portion of pyrolysis reaction chamber has an oilification output pipe, for the discharge of the gas after cracking and cracking oil, and the bottom of pyrolysis reaction chamber is equipped with a slag outlet and a conveying pipe, and the first slag discharge control valve of a slag discharge group is connected to the slag outlet, and the first slag discharge control valve bottom end is connected with a slag collecting cylinder, and the slag collecting cylinder bottom end is connected with a second slag discharge control valve, and the second slag discharge control valve bottom end is connected with the conveying pipe.

Description

Technical Field

[0001] This utility model relates to the field of thermal pyrolysis technology, and in particular to a continuous thermal pyrolysis conveying device. 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 pyrolyzed into 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 an oiling facility, 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 feed port 11 of a feeding device 10, and then fed into the feed port of a pyrolysis reactor 20 via a conveying screw 12, and enters the pyrolysis reaction chamber 21. A heating device 22 is provided on the periphery of the pyrolysis reaction chamber 21. An oil output pipe 23 is provided at the top of the pyrolysis reaction chamber 21 to discharge the gas and pyrolysis oil after pyrolysis. A conveying pipe 30 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] However, in commercial pyrolysis furnaces, the feeding device 10 uses a conveying screw 12 to transport the carbon black produced after pyrolysis, and the carbon black produced after pyrolysis is discharged from the furnace through the conveying pipe 30 at the discharge end. The pyrolysis reaction chamber 21 needs to operate in an oxygen-free or anaerobic environment. Therefore, if the entry of outside air is not effectively blocked when the carbon black is fed in and discharged through the conveying screw 12 and discharged through the conveying pipe 30, it is very easy for it to come into contact at the feed end or discharge end of the pyrolysis furnace, which may cause gas explosions from time to time, resulting in equipment damage and personnel injury.

[0006] Furthermore, the carbon black has a certain temperature and must be cooled down to a certain temperature before it can be discharged, so as not to affect the operation of the conveying pipe 30. Moreover, the thermal pyrolysis reaction chamber 21 must wait for the carbon black to cool down and be discharged before the next thermal pyrolysis of waste plastic can be carried out. In this way, not only is the thermal pyrolysis reaction time of waste plastic not shortened, but energy consumption is also increased.

[0007] Such a structure requires operation in batches, and cannot provide continuous feeding and slag discharge for waste plastic pyrolysis operations, thus failing to effectively improve its operational efficiency. Utility Model Content

[0008] 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, the invention was finally realized.

[0009] The main objective of this invention is to provide a continuous conveying device for pyrolysis, particularly a device that uses the relative action control of a feed control valve, a first slag discharge control valve, and a second slag discharge control valve to create an anaerobic or oxygen-free operating environment within the pyrolysis reaction chamber, thereby maintaining the safety of personnel and equipment during operation.

[0010] Another objective of this utility model is to provide a continuous conveying device for pyrolysis, particularly a device that enables continuous feeding and slag discharge of the primary pyrolysis machine and the pyrolysis reactor by controlling the relative actions of the feed control valve, the first slag discharge control valve and the second slag discharge control valve, thereby shortening the time for waste plastic pyrolysis reaction and waiting for slag discharge, increasing the efficiency of the pyrolysis reaction and providing increased production capacity.

[0011] To achieve the above-mentioned technical objectives, the present invention provides a continuous pyrolysis conveying device, which mainly includes a primary pyrolysis machine, a pyrolysis reactor, and a slag discharge group, wherein:

[0012] The primary pyrolysis machine consists of a cylindrical body supported by a frame. Inside the body is a conveying screw, a feed hopper is located at the front of the body, and a feed control valve is located at the end of the body. The feed control valve is connected to a discharge pipe. The pyrolysis reactor is provided with a feed inlet, which is connected to the discharge pipe of the primary pyrolysis machine. The pyrolysis reactor is provided with a heating device on the periphery of its pyrolysis reaction chamber. The upper part of the pyrolysis reaction chamber is provided with an oil output pipe, and the bottom of the pyrolysis reaction chamber is provided with a slag outlet and a conveying pipe. The slag discharge group is connected to the slag outlet by its first slag discharge control valve, and the bottom end of the first slag discharge control valve is connected to a slag collection cylinder. The bottom end of the slag collection cylinder is connected to a second slag discharge control valve, and the bottom end of the second slag discharge control valve is connected to the conveying pipe of the pyrolysis reactor.

[0013] As a further improvement to the above technical solution, the slag collection cylinder is a cylinder with the largest inner diameter in the middle section and gradually narrowing towards the upper and lower ends.

[0014] As a further improvement to the above technical solution, the outer diameter of the primary pyrolysis machine is covered with multiple heating layers, and the heating layer is an electromagnetic heater.

[0015] As a further improvement to the above technical solution, a heating device, which is an electromagnetic heater, is provided on the periphery of the pyrolysis reaction chamber. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a plan view of a commonly used waste plastic pyrolysis device.

[0018] Figure 2 This is a plan view of the present invention.

[0019] Figure 3 This is a three-dimensional appearance diagram of the initial stage pyrolysis machine of this utility model.

[0020] Figure 4 This utility model Figure 3 Enlarged schematic diagram of part of it.

[0021] Figure 5 This is a three-dimensional appearance diagram of the slag discharge assembly of this utility model.

[0022] Figure 6 This is a plan view of the slag discharge assembly of this utility model.

[0023] In the diagram: 10-Feeding device; 11-Inlet; 12-Conveying screw; 20-Pyrolysis reactor; 21-Pyrolysis reaction chamber; 22-Heating device; 23-Oil output pipe; 30-Conveying pipe; 40-Primary stage pyrolysis machine; 41-Frame; 42-Machine body; 421-Feed hopper; 43-Heating layer; 44-Inlet control valve; 45-Outlet pipe; 50-Pyrolysis reactor; 51-Inlet; 52-Pyrolysis reaction chamber; 53-Heating device; 54-Oil output pipe; 55-Slag outlet; 56-Conveying pipe; 60-Slag discharge group; 61-First slag discharge control valve; 62-Slag collection cylinder; 63-Second slag discharge control valve. Detailed Implementation

[0024] To achieve the aforementioned technical objectives, the structural content 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.

[0025] Please see Figures 2 to 6 As shown, the continuous pyrolysis conveying device of this utility model mainly includes a primary pyrolysis machine 40, a pyrolysis reactor 50, and a slag discharge group 60, wherein: A primary pyrolysis machine 40 is provided, wherein a cylindrical machine body 42 is mounted on a frame 41. A conveying screw is provided inside the machine body 42, and a feed hopper 421 is provided at the front of the machine body 42. The feed hopper 421 allows waste plastic conveyed by the conveyor belt to be fed into the machine body 42. Multiple heating layers 43 are covered on the outer diameter of the machine body 42. The heating layer 43 is an electromagnetic heater. A feed control valve 44 is provided at the end of the machine body 42, and the feed control valve 44 is connected to a discharge pipe 45. A pyrolysis reactor 50 is provided with a feed port 51, which is connected to the discharge pipe 45 of the primary pyrolysis machine 40, and can allow molten plastic waste to enter the pyrolysis reaction chamber 52. A heating device 53, which is an electromagnetic heater, is provided on the periphery of the pyrolysis reaction chamber 52. An oil output pipe 54 is provided at the top of the pyrolysis reaction chamber 52 to discharge the gas and pyrolysis oil after pyrolysis. A slag outlet 55 and a conveying pipe 56 are provided at the bottom of the pyrolysis reaction chamber 52. A slag discharge group 60 is provided, wherein the first slag discharge control valve 61 is connected to the slag outlet 55, and the bottom end of the first slag discharge control valve 61 is connected to a slag collection cylinder 62, the bottom end of the slag collection cylinder 62 is connected to a second slag discharge control valve 63, and the bottom end of the second slag discharge control valve 63 is connected to the conveying pipe 56. The slag collection cylinder 62 is a cylinder with the largest inner diameter in the middle section and gradually narrows towards the upper and lower ends.

[0026] 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 conveyed by conveyor belt to the feed hopper 421 of the body 42 of the primary pyrolysis machine 40 and enter the body 42. They are then conveyed to the discharge pipe 45 by the conveying screw. During the conveying process of the waste plastics in the body 42, the multiple heating layers 43 covering the outer diameter of the body 42 are heated (the temperature is controlled at 100℃~280℃), so that the waste plastics in the body 42 can be gradually decomposed while being conveyed, and can reach the melting stage at the end of the body 42 (that is, the waste plastics become fluid).

[0027] At this time, the feed control valve 44 is open, and the fluid waste plastic is discharged from the discharge pipe 45 and enters the pyrolysis reaction chamber 52 through the feed port 51 on the pyrolysis reactor 50. At this time, the first slag discharge control valve 61 and the second slag discharge control valve 63 are closed. The oxygen content of the waste plastic in the molten stage entering the pyrolysis reaction chamber 52 is close to zero. By means of the heating device 53 set on the periphery of the pyrolysis reactor 50, the temperature is heated to 300℃~800℃, so that the long-chain organic compounds in the fluid waste plastic are heated and their molecular bonds are broken, and finally decomposed into smaller molecular structures, which can achieve the production of gas and pyrolysis oil, and output through the oil output pipe 54. Since the oxygen content of the waste plastic in the molten stage is close to zero when it enters the pyrolysis reaction chamber, a more complete pyrolysis reaction can be obtained, so as to obtain oil and gas of better quality.

[0028] At this point, the main action of this utility model is: (1) When the carbon black produced by the pyrolysis is concentrated at the bottom of the pyrolysis reaction chamber 52, the feed control valve 44 is locked so that the waste plastic in the melting stage of the initial pyrolysis machine 40 no longer enters the pyrolysis reaction chamber 52.

[0029] (2) After the feed control valve 44 is closed, the first slag discharge control valve 61 is opened. In order to prevent air outside the thermal cracking reactor 50 from flowing into the thermal cracking reaction chamber 52 through the slag discharge group 60 and causing carbon black to enter the slag collection cylinder 62, the second slag discharge control valve 63 is still closed at this time.

[0030] (3) When carbon black enters the slag collection cylinder 62, after the first slag discharge control valve 61 is locked, the feed control valve 44 is opened so that the waste plastic in the melting stage of the initial thermal pyrolysis machine 40 re-enters the thermal pyrolysis reaction chamber 52 for thermal pyrolysis. At this time, the second slag discharge control valve 63 is still locked.

[0031] (4) When the carbon black is in the slag collection cylinder 62, the first slag discharge control valve 61 is locked. After the carbon black cools down slightly, the second slag discharge control valve 63 is opened to discharge the carbon black to the conveying pipe 56. At this time, the first slag discharge control valve 61 is still locked to prevent air outside the thermal cracking reactor 50 from flowing into the thermal cracking reaction chamber 52 through the first slag discharge control valve 61, so that the thermal cracking reaction chamber 52 presents an oxygen-free or anaerobic operating environment.

[0032] Thus, through repeated operation, this utility model can achieve the following: (1) By controlling the relative action of the feed control valve 44, the first slag discharge control valve 61 and the second slag discharge control valve 63, an oxygen-free or anaerobic operating environment is created in the pyrolysis reaction chamber to maintain the safety of personnel and equipment.

[0033] (2) By controlling the relative action of the feed control valve 44, the first slag discharge control valve 61 and the second slag discharge control valve 63, the primary thermal pyrolysis machine and the thermal pyrolysis reactor can achieve continuous feeding and slag discharge, thereby shortening the time for waste plastic thermal pyrolysis reaction and waiting for slag discharge, increasing the efficiency of thermal pyrolysis reaction, and providing an increase in production capacity.

[0034] (3) When carbon black is in the slag collection cylinder, the slag collection cylinder is a cylindrical cylinder with the largest inner diameter in the middle section and gradually narrows towards the upper and lower ends, so that the carbon black can be smoothly discharged to the conveying pipe without remaining in the slag collection cylinder.

[0035] 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.

[0036] In summary, this utility model, through the relative action control of the feed control valve, the first slag discharge control valve, and the second slag discharge control valve, enables the primary pyrolysis machine and the pyrolysis reactor to achieve continuous feeding and slag discharge, thereby shortening the time for waste plastic pyrolysis reaction and waiting for slag discharge. This increases the efficiency of the pyrolysis reaction and saves energy, thus achieving environmental protection, energy saving, and zero pollution. Its structural changes and functional improvements are beyond doubt. Furthermore, this utility model was not published or publicly used before the application, and therefore meets the requirements for a patent application. Thus, a patent application is filed in accordance with the law.

Claims

1. A continuous pyrolysis conveying device, characterized in that, It mainly includes a primary thermal pyrolysis unit, a thermal pyrolysis reactor, and a slag discharge group, wherein: The primary pyrolysis machine consists of a cylindrical body supported by a frame. Inside the body is a conveying screw, a feed hopper is located at the front of the body, and a feed control valve is located at the end of the body. The feed control valve is connected to a discharge pipe. The pyrolysis reactor is provided with a feed inlet, which is connected to the discharge pipe of the primary pyrolysis machine. The pyrolysis reactor is provided with a heating device on the periphery of its pyrolysis reaction chamber. The upper part of the pyrolysis reaction chamber is provided with an oil output pipe, and the bottom of the pyrolysis reaction chamber is provided with a slag outlet and a conveying pipe. The slag discharge group is connected to the slag outlet by its first slag discharge control valve, and the bottom end of the first slag discharge control valve is connected to a slag collection cylinder. The bottom end of the slag collection cylinder is connected to a second slag discharge control valve, and the bottom end of the second slag discharge control valve is connected to the conveying pipe of the pyrolysis reactor.

2. The pyrolysis continuous conveying device according to claim 1, characterized in that, The slag collection cylinder is a cylindrical shape with the largest inner diameter in the middle section, gradually narrowing towards the top and bottom.

3. The pyrolysis continuous conveying device according to claim 1, characterized in that, The outer diameter of the primary pyrolysis machine is covered with multiple heating layers, and each heating layer is an electromagnetic heater.

4. The pyrolysis continuous conveying device according to claim 1, characterized in that, A heating device, which is an electromagnetic heater, is installed around the periphery of the pyrolysis reaction chamber.

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