Electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber.

Abstract

This invention provides an electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, enabling complete thermal decomposition of waste rubber, achieving high thermal efficiency and energy savings, while improving recovery efficiency and the quality of carbon black products through consistent, continuous operation. [Solution] The system consists of a pyrolysis apparatus 1, a coarse carbon black processing apparatus 2, a carbon black product production apparatus 3, a pyrolysis oil gas processing apparatus 4, and a pyrolysis gas power generation apparatus 5. The pyrolysis apparatus has multiple pyrolysis furnaces 11 arranged in series in multiple stages, and each pyrolysis furnace is surrounded by an electromagnetic heating apparatus 12. The heating temperature inside each pyrolysis furnace is stably controlled in multiple stages to pyrolysis reaction and modification of waste rubber chips to produce coarse carbon black, pyrolysis oil, and pyrolysis gas. The coarse carbon black is sent to the coarse carbon black processing apparatus and the carbon black product production apparatus to produce recovered carbon black products with the desired temperature and moisture content.

Description

Technical Field

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[0001] The present invention relates to the technical field of an electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components in waste rubber. In particular, the waste rubber is pyrolyzed by electromagnetic heating, and the generated pyrolysis gas is used for power generation as a heat source for electromagnetic heating, so as to stably control the pyrolysis temperature, realize a complete pyrolysis reaction, and recycle energy, thereby providing an energy-saving effect. The present invention relates to an electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components in waste rubber.

Background Art

[0002] Rubber products have made great contributions to people's lives and the development of industries. However, a large amount of waste generated after use has a serious impact on the environment. In particular, the amount of waste tires is extremely large. The material of waste rubber is not naturally decomposed and does not rot. When burned, a large amount of smoke and toxic gases are generated, so it is not suitable for conventional landfill treatment or incineration treatment, and it is extremely disadvantageous from the perspective of environmental protection.

[0003] Currently, as an international waste rubber treatment method, in order to balance environmental protection and resource value improvement, generally, a pyrolysis heating method is adopted. Under appropriate temperature and low oxygen conditions, waste rubber is pyrolyzed, and carbon black, pyrolysis oil, and pyrolysis gas are pyrolytically extracted, and then reprocessed into recovered products with high economic benefits.

[0004] Based on investigations, current waste rubber pyrolysis equipment is all composed of a pyrolysis furnace and a combustion furnace. The pyrolysis furnace uses the high-temperature gas generated by the combustion of the combustion furnace as a heat source, and pyrolyzes the fed waste rubber pieces in a high-temperature and oxygen-free state to generate carbon black, pyrolysis oil, and pyrolysis gas containing a large amount of organic matter. After undergoing processing, recovered products are manufactured for reuse. [[ID=二十一]] [[ID=二十二]]

[0005] [[ID=二十三]] However, in this heating method, where high-temperature hot air generated by combustion in a combustion furnace is sent to a pyrolysis furnace for pyrolysis, controlling the combustion heating and pyrolysis temperatures is extremely difficult. Furthermore, the amount of exhaust gas generated after pyrolysis is enormous, and the temperature of the exhaust gas is very high (approximately 550°C). Therefore, it is necessary to strictly monitor the amount of exhaust gas and to immediately discharge and reuse the exhaust gas; otherwise, an explosion can easily occur. Consequently, all of the aforementioned pyrolysis facilities require the addition of numerous exhaust gas monitoring devices and complex connecting piping, which inevitably leads to the disadvantage of considerably increasing the size and complexity of the equipment, and increasing the inconvenience of maintenance and operational monitoring.

[0006] Furthermore, when the high-temperature exhaust gas generated in the conventional pyrolysis equipment leaves the pyrolysis furnace and is sent through piping to a drying furnace, where it is used to dry the produced carbon black, the exhaust gas comes into direct contact with the carbon black in the opposite direction, heating the carbon black and evaporating the moisture it contains. Therefore, if black smoke is generated due to poor combustion in the combustion furnace, or if ash is present in the supplied fuel, the black smoke and other impurities will deposit on the surface of the carbon black when the exhaust gas comes into direct contact with the carbon black, seriously affecting the quality of the produced carbon black. This further highlights the significant disadvantage of conventional pyrolysis equipment in terms of quality control of the produced carbon black product. [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to provide an electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, which is safe and easy to operate. This system achieves energy savings by using electromagnetic heating to pyrolyze waste rubber, providing high thermal efficiency and stable control of the pyrolysis temperature to complete the pyrolysis reaction, and by providing the generated pyrolysis gas as fuel necessary for power generation and as a power source for electromagnetic heating.

[0008] The present invention further aims to provide an electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, which can effectively improve the efficiency of waste rubber recovery and enhance the quality of the recovered carbon black product by employing a consistent, continuous operation in the manufacturing processes of pyrolysis, recovered carbon black treatment, and pyrolysis oil gas treatment. [Means for solving the problem]

[0009] To achieve the above objectives, this invention comprises a pyrolysis apparatus, a coarse carbon black processing apparatus, a carbon black product production apparatus, a pyrolysis oil gas processing apparatus, and a pyrolysis gas power generation apparatus. The pyrolysis apparatus consists of multiple pyrolysis furnaces arranged in multiple stages, and each furnace body employs electromagnetic heating, allowing for stable control of the temperature inside each furnace in multiple stages. Under negative pressure, it completely pyrolyzes and modifies the fed waste rubber chips to produce coarse carbon black, pyrolysis oil, and pyrolysis gas. The coarse carbon black processing apparatus is in communication with the pyrolysis apparatus and includes a rotary screen device, a magnetic separator, a bar magnet, and a coarse carbon black temporary storage tank. The coarse carbon black processing apparatus sieves the fed coarse carbon black into particles of a certain size, magnetically separates the steel wire and metal impurities contained in the fed coarse carbon black, and then stores it in the coarse carbon black temporary storage tank. Once a certain amount has accumulated, it is sent to the carbon black product production apparatus. The carbon black product production apparatus comprises a crushing and sorting machine, a crushing and dust collection machine, a collection buffer tank, a granulator, and a drying oven. The crushing and sorting machine is connected to a temporary storage tank for coarse carbon black, and crushes the coarse carbon black that is fed in into a fine powder, collects the carbon black, and sends it to the collection buffer tank. Once a certain amount has accumulated, it is stably fed into the granulator, thereby turning the powdered carbon black into granules. By drying this granular carbon black in a drying oven to remove excess moisture from the carbon black, a recovered carbon black product with the desired temperature and moisture content can be obtained. The pyrolysis oil gas treatment apparatus is connected to a pyrolysis apparatus and comprises a pyrolysis oil spray cooling device, a condenser, a pyrolysis oil sedimentation tank, and a pyrolysis oil filtration device. The pyrolysis oil gas treatment apparatus first condenses the oil gas produced by the pyrolysis reaction, extracts the initial pyrolysis oil from the condensable portion, and further precipitates and filters it to produce pyrolysis oil containing a large amount of biomass components. The pyrolysis gas that cannot be condensed is sent to the pyrolysis gas power generation device.The pyrolysis gas power generation system comprises a pyrolysis gas storage tank, a pyrolysis gas filtration system, a pyrolysis gas desulfurization absorption tower, a generator, and a waste heat recovery system. The pyrolysis gas storage tank communicates with a condenser to filter and desulfurize the incoming pyrolysis gas, which can then be used as fuel for power generation by the generator. The electricity generated is also recirculated and supplied as a power source for electromagnetic heating in the pyrolysis system. The hot air discharged from the generator is discharged after its heat is recovered by the waste heat recovery system, and the resulting hot air can be directly introduced into a drying oven to be used as a heat source for drying carbon black products. [Effects of the Invention]

[0010] As a result, the electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber can stably control the pyrolysis temperature of the pyrolysis apparatus through electromagnetic heating, ensuring the complete pyrolysis reaction is achieved. Furthermore, the pyrolysis gas produced by the pyrolysis reaction can be used as fuel for power generation and as a power source for electromagnetic heating, thus providing energy-saving effects. In addition, by employing a consistent, continuous operation in the pyrolysis, recovered carbon black processing, and pyrolysis oil gas processing processes, the efficiency of waste rubber recovery processing can be effectively improved, and the quality of the recovered carbon black product can be enhanced. [Brief explanation of the drawing]

[0011] [Figure 1] This is a structural block diagram of the electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, according to the present invention. [Modes for carrying out the invention]

[0012] The design of the overall system structure and the technical details used in this invention will be explained below with the help of diagrams.

[0013] Refer to Figure 1. This invention consists of a pyrolysis apparatus 1, a coarse carbon black processing apparatus 2, a carbon black product production apparatus 3, a pyrolysis oil gas processing apparatus 4, and a pyrolysis gas power generation apparatus 5.

[0014] The pyrolysis apparatus 1 consists of multiple pyrolysis furnaces 11 arranged in series in multiple stages (four stages in the figure, but not limited to this). Each pyrolysis furnace 11 is surrounded by an electromagnetic heating device 12. The electromagnetic heating device 12 uses electricity as a heat source to stably control the heating temperature in each pyrolysis furnace 11 in multiple stages, maintaining it between 300°C and 550°C, and heating the final pyrolysis furnace 11 to the maximum temperature. As a result, the waste rubber chips A, which are crushed and fed in under negative pressure, are continuously transported by screw conveyors 111 installed in each pyrolysis furnace 11, and the pyrolysis reaction is carried out completely in multiple stages in a high-temperature, oxygen-free environment. This also modifies the material to produce coarse carbon black, pyrolysis oil, and pyrolysis gas, thereby making the pyrolysis reaction more complete and accelerating the reaction rate.

[0015] The coarse carbon black processing device 2 is in communication with the pyrolysis device 1 and comprises a rotary screen device 21, a magnetic separator 22, a bar magnet 23, and a coarse carbon black temporary storage tank 24. The coarse carbon black produced by pyrolysis is first sent to the rotary screen device 21 by a bucket elevator 211. Inside the rotary screen device 21 is a sieve 212 with a mesh of a certain size, which is driven and operates, advancing and spreading the introduced coarse carbon black in its direction of operation. Furthermore, as the introduced coarse carbon black advances, coarse carbon black particles smaller than the mesh of the sieve 212 pass through the sieve 212 and fall, and are then sent to the magnetic separator 22. Larger, coarser carbon black particles that cannot pass through the sieve 212 are discharged from the outermost opening as the sieve 212 operates, and can be recovered and fed into the pyrolysis apparatus 1 for further pyrolysis.

[0016] Furthermore, a rotor 221 is provided in the center of the magnetic separator 22. The rotor 221 can rotate in a certain direction and is equipped with a magnet inside. As a result, the coarse carbon black that has been sorted by the rotary screen device 21 is transported along the direction in which the rotor 221 rotates, and the magnet is used to magnetically attract steel wires or other metallic impurities contained in the coarse carbon black. The multiple metallic impurities such as steel wires continue to rotate in the direction in which the rotor 221 rotates, and when they reach an angle in which the rotor 221 is not magnetic, the multiple metallic impurities such as steel wires fall naturally to the outlet nozzle 222 due to the gravity of the metallic impurities themselves. Non-metallic materials such as coarse carbon black fall to the other outlet nozzle 223 and are sent to the coarse carbon black temporary storage tank 24 via the bucket elevator 224. Before being sent to the coarse carbon black temporary storage tank 24, the non-metallic material is magnetically attracted by a bar magnet 23 to remove any remaining metallic impurities such as steel wire. Once a certain amount has accumulated in the coarse carbon black temporary storage tank 24, it is stably fed into the carbon black product production apparatus 3.

[0017] The carbon black product production apparatus 3 comprises a crushing and sorting machine 31, a crushing and dust collection machine 32, a collection buffer tank 33, a granulator 34, and a drying oven 35. The crushing and sorting machine 31 is in communication with a temporary storage tank 24 for coarse carbon black. The crushing and sorting machine 31 crushes the coarse carbon black introduced from the temporary storage tank 24, breaking down the carbon black's inherent aggregate state and turning it into a fine powder that can be granulated, which is then sucked up by the crushing and dust collection machine 32. A dust filter bag 321 is provided inside the crushing and dust collection machine 32, so that the powdered carbon black introduced by the airflow is captured as it passes through the dust filter bag 321, and dust and carbon black are collected. Furthermore, the collected carbon black is transported to the collection buffer tank 33 at the rear, and when a certain amount has accumulated, it is stably fed into the granulator 34 via an airtight valve 331 and transport piping.

[0018] Inside the granulator 34, cylindrical rods 341 are arranged in a spiral pattern, which transports the carbon black to the rear. During the transport process, granulation water is added, and the interaction between the cylindrical rods 341 and the enclosure causes the powdered carbon black to become granular, making it easier to transport. Furthermore, the powdered carbon black is sent to a drying oven 35 to dry and remove excess moisture from the carbon black. The recovered carbon black product B, which meets the desired temperature and moisture content standards, is then sent to the carbon black product storage tank 36 by a bucket elevator 351, where it is weighed, packaged, and shipped.

[0019] The recovered carbon black product produced by implementing this invention based on the above-described method has, as a result of product quality analysis tests, only slightly lower basic physical properties than those of ASTM's N330 standard carbon black, as shown in Table 1. The results of the rubber processing test, as shown in Table 2, demonstrate the overall physical properties of the recovered carbon black (including reinforcing properties, dispersibility, and blackness), and can serve as a reference for different industries when applying or adjusting the formulation of recovered carbon black, thus possessing considerable industrial value. [Table 1] [Table 2]

[0020] The pyrolysis oil gas treatment device 4 is in communication with the pyrolysis device 1, and is composed of a pyrolysis oil spray cooling device 41, a condenser 42, a pyrolysis oil sedimentation tank 43, and a pyrolysis oil filtration device 44. The oil gas generated by the pyrolysis reaction of the pyrolysis device 1 is condensed by the pyrolysis oil spray cooling device 41 and the condenser 42, and the condensable part is extracted from the bottom as the initial pyrolysis oil. Further, through sedimentation and filtration by the pyrolysis oil sedimentation tank 43 and the pyrolysis oil filtration device 44, pyrolysis oil C containing a large amount of biomass components is generated. The non-condensable pyrolysis gas D is sent to the pyrolysis gas power generation device 5 and used as fuel.

[0021] Based on the above, the pyrolysis gas generated by implementing the present invention, the pyrolysis oil containing a large amount of biomass, and the results of the component analysis test of the pyrolysis oil show that the component analysis of the pyrolysis gas is as shown in Table 3, the component analysis of the pyrolysis oil containing a large amount of biomass is as shown in Table 4, and the component analysis of the biomass components in the pyrolysis oil is as shown in Table 5. Each of the generated products is generally accepted and used in the market.

Table 3

Table 4

Table 5

[0022] The pyrolysis gas power generation device 5 is composed of a pyrolysis gas storage tank 51, a pyrolysis gas filtration device 52, a pyrolysis gas desulfurization absorption tower 53, a generator 54, and a waste heat recovery device . The pyrolysis gas storage tank 51 is in communication with the condenser 42 [[ID=The pyrolysis gas D that cannot be condensed is temporarily stored inside and then pressurized and sent to the pyrolysis gas filtration device 52 to remove fine carbon black particles and oil droplets from the pyrolysis gas D. After that, the pyrolysis gas D is sent to the pyrolysis gas desulfurization absorption tower 53 to reduce the concentration of hydrogen sulfide in the pyrolysis gas D to less than 20 ppm and use as fuel for power generation by the generator 54. Furthermore, the electricity generated by the generator 54 is returned to the pyrolysis device 1 and can be used as a power source for the electromagnetic heating devices 12 of each pyrolysis furnace 11. In addition, the waste heat recovery device 55 is in communication with the drying furnace 35 and recovers the heat of the hot air discharged from the generator 54 before discharging it, and the hot air generated by waste heat recovery is directly introduced into the drying furnace 35 and used as a heat source for drying the carbon black product, thereby increasing energy utilization efficiency and achieving energy saving effects.

[0023] This invention employs electromagnetic heating in each pyrolysis furnace 11 of the pyrolysis apparatus 1, allowing for stable control of the heating temperature of each pyrolysis furnace 11. This is advantageous for smoothly carrying out the pyrolysis reaction of waste rubber and offers advantages such as high thermal efficiency and a more complete reaction. Furthermore, by utilizing the pyrolysis gas D produced in the pyrolysis reaction as fuel for the generator 54, using the electricity generated by the generator 54 as the power source for electromagnetic heating, and recovering the hot air discharged from the generator 54 as waste heat to generate hot air which is used as the drying heat source for the drying furnace 35, significant energy savings can be achieved. In addition, this invention effectively improves the efficiency of waste rubber recovery processing by performing a continuous processing operation of waste rubber using the pyrolysis apparatus 1, the coarse carbon black processing apparatus 2, the carbon black product production apparatus 3, and the pyrolysis oil gas processing apparatus 4. This also improves the quality of the recovered carbon black B and enables the production of recovered carbon black product B that meets quality requirements. Therefore, it is clear that this invention has significant industrial value. [Explanation of Symbols]

[0024] 1 Pyrolysis equipment 11 Pyrolysis furnace 111 Screw conveyor 12 Electromagnetic heating device 2. Coarse carbon black processing equipment 21 Rotary Screen Device 211 Bucket elevator 212 sieves 22 Magnetic separator 221 Rotor 222 Outlet nozzle 223 Outlet nozzle 224 Bucket Elevator 23 Bar magnets 24 Coarse carbon black temporary storage tank 3. Carbon Black Product Production Equipment 31. Crushing and sorting machine 32. Crushing and dust collection machine 321 Dust filter bag 33 Collection buffer tank 331 Airtight valve 34 Granulator 341 Cylindrical rod 35 Drying oven 351 Bucket elevator 36 Carbon Black Product Storage Tanks 4. Pyrolysis oil gas treatment equipment 41 Pyrolysis oil spray cooling device 42 Capacitors 43. Pyrolysis oil sedimentation tank 44. Pyrolysis oil filtration system 5. Pyrolysis gas power generation device 51 Pyrolysis gas storage tank 52 Pyrolysis gas filtration system 53 Pyrolysis gas desulfurization absorption tower 54 Generators 55 Waste heat recovery system A. Waste rubber chips B. Recycled carbon black C Pyrolysis oil D Pyrolysis gas

Claims

1. An electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, comprising a pyrolysis apparatus, a coarse carbon black processing apparatus, a carbon black product production apparatus, a pyrolysis oil gas processing apparatus, and a pyrolysis gas power generation apparatus, The aforementioned pyrolysis apparatus consists of multiple pyrolysis furnaces arranged in multiple stages, and generates coarse carbon black, pyrolysis oil, and pyrolysis gas by pyrolysis reaction of crushed waste rubber chips in a high-temperature, oxygen-free state. The aforementioned coarse carbon black processing apparatus is in communication with the pyrolysis apparatus and comprises a rotary screen device, a magnetic separator, a bar magnet, and a coarse carbon black temporary storage tank. The apparatus sieves the coarse carbon black supplied from the pyrolysis apparatus into particles of a certain size and magnetically separates the steel wire and metal impurities contained in the supplied coarse carbon black. The carbon black product production apparatus is connected to a coarse carbon black processing apparatus and includes a crushing and sorting machine, a crushing and dust collection machine, a collection buffer tank, a granulator, and a drying oven. It crushes the input coarse carbon black into a fine powder, collects it, granulates it, dries it, and then produces a recovered carbon black product. The pyrolysis oil gas treatment apparatus is in communication with the pyrolysis apparatus and comprises a pyrolysis oil spray cooling device, a condenser, a pyrolysis oil sedimentation tank, and a pyrolysis oil filtration device, which condenses the pyrolysis oil and pyrolysis gas produced by the pyrolysis reaction to produce pyrolysis oil containing a large amount of biomass components and pyrolysis gas that cannot be condensed. The pyrolysis gas power generation apparatus comprises a pyrolysis gas storage tank, a pyrolysis gas filtration device, a pyrolysis gas desulfurization absorption tower, a generator, and a waste heat recovery device, and is in communication with the condenser, and filters out non-condensable pyrolysis gas to remove fine carbon black particles and oil droplets, and reduces the concentration of hydrogen sulfide in the pyrolysis gas. An electromagnetic pyrolysis system for pyrolysis oil containing large amounts of recovered carbon black and biomass components from waste rubber, characterized in that each pyrolysis furnace in the pyrolysis apparatus is surrounded by an electromagnetic heating device, each of the electromagnetic heating devices uses electricity as a heat source, and the heating temperature of each pyrolysis furnace is stably controlled in multiple stages to carry out a complete pyrolysis reaction, the generated non-condensable pyrolysis gas is filtered to reduce the concentration of hydrogen sulfide and used as fuel for power generation by a generator, and the electricity generated by the generator is returned to the pyrolysis apparatus to serve as a power source for the electromagnetic heating device of each pyrolysis furnace.

2. The electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components from waste rubber, as described in claim 1, characterized in that the heating temperature in each pyrolysis furnace in the pyrolysis apparatus is maintained between 300°C and 550°C, and the final pyrolysis furnace is heated to the maximum temperature.

3. An electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components from waste rubber, as described in claim 1, characterized in that a sieve is provided inside the rotary screen device, the sieve is driven and operates to advance and spread the introduced coarse carbon black, so that coarse carbon black particles smaller than the mesh of the sieve pass through the sieve and fall into the magnetic separator, and coarse carbon black particles larger than the mesh of the sieve are discharged from the outermost opening as the sieve operates, and are recovered and fed into the pyrolysis device for pyrolysis again.

4. An electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components from waste rubber, as described in claim 1, characterized in that a rotor is provided in the center of the magnetic separator, the rotor rotates in a certain direction and has magnets inside, so that the fallen coarse carbon black particles are transported along the direction in which the rotor rotates, steel wire or other metallic impurities contained in the coarse carbon black are magnetically attracted and continue to rotate in the direction in which the rotor rotates, and when it reaches an angle in which the rotor is not magnetic, the multiple metallic impurities such as steel wire and non-metallic materials such as coarse carbon black fall out from different outlet nozzles.

5. The aforementioned waste heat recovery device is in communication with the drying oven, recovers and then discharges the heat from the hot air discharged from the generator, and also directly introduces the generated hot air into the drying oven to serve as a heat source for drying the carbon black product, characterized in that it is an electromagnetic pyrolysis system for pyrolysis oil containing a large amount of recovered carbon black and biomass components in waste rubber, as described in claim 1.

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