Harmless treatment device for non-methane hydrocarbon in rubber recovery

Abstract

The invention discloses a harmless treatment device for non-methane hydrocarbon in rubber recovery in the technical field of rubber recovery treatment, which comprises a combustion part and a filtering and cooling part, and further comprises a treatment device, and the treatment device comprises a waste heat recovery part and a purification part. The purification part comprises a main body, a waste gas purification channel is formed in the main body, a plurality of adsorption assemblies are arrayed in the main body, a plurality of desorption cavities are arrayed in the main body, and microwave radiators are mounted on the two inner side walls of each desorption cavity; the waste heat recovery part comprises a main driving groove formed in one side of the main body, a thermal cavity is formed in the inner bottom wall of the main driving groove, and a thermal assembly is installed in the thermal cavity. Waste heat contained in waste gas generated during rubber pyrolysis recovery is used for driving the resistance assembly to operate before cooling, the adsorption assembly is driven to rotate, and the adsorption assembly alternately operates in the adsorption area and the desorption area, so that adsorption and desorption are synchronously carried out, the replacement frequency of an adsorption material is reduced, and meanwhile, the energy utilization rate is increased.

Description

Technical Field

[0001] This invention relates to the field of rubber recycling technology, specifically to a device for the harmless treatment of non-methane total hydrocarbons in rubber recycling. Background Technology

[0002] Non-methane hydrocarbons (NMHC) are a significant class of environmental pollutants. NMHC refers to the total hydrocarbons remaining after deducting methane from total hydrocarbons, primarily including C2-C12 alkanes, alkenes, aromatic hydrocarbons, and oxygenated hydrocarbons (such as aldehydes and ketones). Their composition is complex, with significant differences between different emission sources (e.g., the petrochemical industry is dominated by alkanes, while the printing industry contains more oxygenated hydrocarbons). NMHC is highly volatile (easily escaping from liquid / solid substances) and has strong photochemical activity. It can react with nitrogen oxides under sunlight to generate photochemical smog substances such as ozone and peroxyacetyl nitrate (PAN), making it a key precursor to urban air pollution.

[0003] A search revealed a method and apparatus for low-temperature pyrolysis of waste rubber using a sputtering bed, disclosed in publication number CN1228367C. The apparatus consists of a blower, a combustible gas source, a burner, a feeder, a sputtering bed, a cyclone separator, an electrostatic precipitator, a condenser, a flow meter, a thermometer, and a control device. It is mainly used for waste rubber treatment. Waste rubber particles are fed into the sputtering bed reactor by the feeder. Combustible gas and air are driven into the burner by the blower, and the flue gas generated by combustion enters the sputtering bed reactor, causing the rubber particles to sputter and thus achieving low-temperature pyrolysis of the rubber particles.

[0004] In existing technologies, NMHC gaseous pollutants generated during rubber recycling are typically treated using adsorption methods (selectively adsorbing hydrocarbons, oxygen-containing organic compounds, and other pollutants from the waste gas through adsorption materials such as activated carbon and molecular sieves to achieve emission standards). However, this method requires frequent replacement or regeneration (such as thermal desorption). Furthermore, traditional thermal desorption requires external heating (electric or gas), and energy consumption accounts for more than 40% of the total system cost.

[0005] Therefore, this invention proposes a harmless treatment device for non-methane total hydrocarbons in rubber recycling to solve the above-mentioned problems. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a harmless treatment device for non-methane total hydrocarbons in rubber recycling. It utilizes the residual heat contained in the waste gas generated during rubber pyrolysis recycling to allow the adsorbent material to operate alternately in the adsorption and desorption zones, thereby enabling adsorption and desorption to occur simultaneously, reducing the frequency of adsorbent material replacement while improving energy utilization.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a harmless treatment device for non-methane total hydrocarbons in rubber recycling, comprising a combustion section for thermally decomposing rubber and a filtration and cooling section for cooling and filtering the waste gas formed after the thermal decomposition of rubber, and further comprising a treatment device for adsorption and purification of the waste gas, the treatment device comprising a waste heat recovery section and a purification section, wherein the waste gas generated by the combustion section passes through the waste heat recovery section-filtration and cooling section-purification section in sequence before being discharged. The purification unit includes a main body with an exhaust gas purification channel inside. The exhaust gas purification channel is connected to a first inlet pipe and a first exhaust pipe at both ends. Several adsorption components for catalytic adsorption of non-methane total hydrocarbons in the exhaust gas are linearly arranged along the length of the exhaust gas purification channel inside the main body. Several desorption chambers corresponding to the adsorption components are also linearly arranged along the length of the exhaust gas purification channel inside the main body. Microwave radiators for desorption and regeneration of the adsorption components are installed on the inner side walls of the two desorption chambers. A return pipe connected to the combustion unit is provided at the bottom of each desorption chamber. The adsorption components are all rotatably coupled with the main body. The waste heat recovery unit includes a main drive tank on one side of the main body. A thermal cavity is opened in the bottom wall of the main drive tank. A thermal component is installed inside the thermal cavity to drive the waste heat adsorption component to rotate.

[0008] Basic Principle: This device uses the waste heat from the pyrolysis of rubber in the combustion chamber to drive the thermal assembly, causing the adsorption assembly to rotate periodically between the waste gas purification channel and the desorption chamber. When the adsorption assembly is in the waste gas purification channel, the catalytic adsorption layer adsorbs non-methane hydrocarbons; when rotating to the desorption chamber, the microwave radiator desorbs and regenerates the saturated catalytic layer, and the volatile substances produced by desorption are returned to the combustion chamber for secondary combustion via the return pipe. The waste heat recovery unit uses the gas expansion in the thermal chamber to drive the piston-linkage mechanism, converting thermal energy into mechanical energy to drive the rotation of the adsorption assembly, achieving continuous alternating adsorption-desorption operation.

[0009] The above-mentioned solution has the following advantages: 1. Compared with existing technologies, this solution, by constructing an adsorption-desorption dynamic circulation system, converts the waste heat of the exhaust gas into mechanical kinetic energy to drive the rotation of the adsorption components, achieving automatic switching between the adsorption and desorption zones. Compared with traditional fixed-bed adsorption devices, this design forms a continuous closed-loop operation for waste gas treatment and material regeneration. Without requiring external energy input, it effectively recovers the waste heat resources of the 110-150℃ exhaust gas and avoids the processing interruption caused by downtime for replacing adsorption materials in traditional processes, thus improving equipment processing efficiency by more than 30%. Simultaneously, the coaxial design of the thermal drive system and the main structure significantly optimizes the space utilization of the device.

[0010] 2. This solution employs a synergistic mechanism of microwave-assisted desorption and combustion reuse. Low-temperature desorption is achieved by precisely exciting the molecular motion of the adsorbent material through a microwave radiator, reducing energy consumption by 40%-50% compared to conventional thermal desorption technology. The volatile organic compounds generated during desorption are returned to the combustion section via a reflux pipe for secondary treatment, forming a closed-loop decomposition pathway for pollutants. This extends the replacement cycle of the adsorbent material, while the secondary combustion in the pyrolysis furnace thoroughly decomposes harmful substances, achieving a dual improvement in non-methane total hydrocarbon removal rate and energy utilization efficiency.

[0011] Furthermore, all adsorption components include a catalytic adsorption layer, and the catalytic adsorption layer is coaxially and fixedly connected to the thermal component.

[0012] Beneficial effects: The coaxial linkage between the catalytic adsorption layer and the thermal component eliminates the traditional transmission structure, which reduces mechanical friction and energy loss, and enhances the utilization efficiency of waste heat of the adsorption material through axial heat conduction, ensuring precise synchronization of adsorption / desorption switching.

[0013] Furthermore, the thermal component includes a first rotating shaft, which is coaxially and fixedly connected to the catalytic adsorption layer and is disposed between the exhaust gas purification channel and the desorption chamber and rotates in cooperation with the main body; The main body is provided with a first transmission cavity and a second transmission cavity. One end of the first rotating shaft extends into the first transmission cavity and is coaxially fixedly connected to a first gear. The first gear meshes with a second gear. The second gear is coaxially fixedly connected to a second rotating shaft that rotates with the main body. One end of the second rotating shaft extends into the second transmission cavity and is coaxially fixedly connected to a third gear. The third gear meshes with a fourth gear. The fourth gear is coaxially fixedly connected to a third rotating shaft. One end of the third rotating shaft extends into the main drive groove and is coaxially fixedly connected to a first pulley. The first pulley is belt-driven and connected to a second pulley. The second pulley is coaxially fixedly connected to a fourth rotating shaft. A secondary drive groove is opened on one side of the main body, which is opposite to the main drive groove. One end of the fourth shaft is coaxially fixedly connected to the main counterweight wheel located in the main drive groove, and the other end of the fourth shaft extends into the secondary drive groove and is coaxially fixedly connected to the secondary counterweight wheel. The main counterweight wheel is eccentrically hinged to a first connecting rod, and a first piston is hinged to the end of the first connecting rod away from the main counterweight wheel; the secondary counterweight wheel is eccentrically hinged to a second connecting rod, and a second piston is hinged to the end of the second connecting rod away from the secondary counterweight wheel; the main body has a main moving cavity and a secondary moving cavity, and a main piston cylinder and a secondary piston cylinder are respectively installed in the main moving cavity and the secondary moving cavity; the first piston and the second piston are respectively located in the main piston cylinder and the secondary piston cylinder, and the first piston and the second piston slide in contact with the inner walls of the main piston cylinder and the secondary piston cylinder, respectively; The main moving chamber is connected to a second intake pipe and a second exhaust pipe. The first intake pipe is connected to the second exhaust pipe, and the second intake pipe is connected to the combustion chamber.

[0014] Beneficial effects: This multi-stage transmission system, through the composite linkage design of gear sets, pulleys, and eccentric counterweights, transforms the linear motion of the gas expanding due to heat in the thermal chamber into precise rotational power for the adsorption components. The symmetrical layout of the main and auxiliary counterweights and the dual pistons forms a dynamic balance system, generating reciprocating thrust under the drive of waste heat from the exhaust gas, enabling the gear set to obtain continuous torque output.

[0015] Furthermore, the diameter of the main counterweight wheel is larger than the diameter of the secondary counterweight wheel.

[0016] Beneficial effects: The increased diameter of the main counterweight wheel enhances the moment of inertia. Through the dynamic balance of the reciprocating impact of the piston by the asymmetric inertial force, the thermal expansion kinetic energy is more evenly converted into the smooth torque of the gear set, eliminating transmission dead spots and optimizing the continuity of switching actions.

[0017] Furthermore, a starter motor is installed in the main drive slot, and a starter cam is coaxially and fixedly connected to the output shaft of the starter motor. The main counterweight wheel is located within the motion trajectory of the starter cam.

[0018] Beneficial effects: The electromechanical coordination design of the starting cam and the main counterweight wheel breaks through the bottleneck of cold start of the system. By triggering the initial angular displacement of the main counterweight wheel through short-term electrical energy input, the mechanical interference generated by the lifting of the starting cam is used to forcibly break the static balance of the transmission system, so that the main counterweight wheel can obtain initial kinetic energy under the condition of waste heat of exhaust gas, and thus continue to work by utilizing waste heat.

[0019] Furthermore, the number of teeth on the first gear is greater than the number of teeth on the fourth gear.

[0020] Beneficial effects: By constructing a reduction mechanism through the difference in the number of teeth between the first and fourth gears, the high speed output of the main counterweight wheel is converted into a low speed and high torque rotation of the catalytic adsorption layer, so that the exhaust gas forms an optimal residence time of 0.8-1.2 seconds on the surface of the catalytic adsorption layer, ensuring that the non-methane total hydrocarbon adsorption rate is ≥98% while avoiding airflow disturbance caused by excessive speed affecting the desorption and regeneration efficiency.

[0021] Furthermore, both the moving cavity and the auxiliary moving cavity are located below the main drive slot.

[0022] Beneficial effects: By lowering the power mechanism below the microwave working area, the thermomagnetic coupling effect of microwave radiation on the piston seal is blocked through physical isolation, preventing eddy current heating of metal components caused by high-frequency electromagnetic fields and ensuring the normal movement of the first and second pistons.

[0023] Furthermore, the phase difference between the first piston and the second piston is 90°.

[0024] Beneficial effects: The 90° phase difference between the two pistons forms a four-stroke alternating compensation mechanism, which eliminates the transmission dead zone through the superposition of sine and cosine power, enabling the gear set to obtain uninterrupted torque input.

[0025] Furthermore, a VOCs concentration sensor is installed inside the first exhaust pipe.

[0026] Beneficial effects: The VOCs concentration sensor, along with the combustion unit and return pipe, forms a closed-loop control system that monitors exhaust gas data in real time to alert staff. This creates a dynamic negative feedback mechanism of emission exceeding standards - regeneration enhancement - combustion reuse, ensuring that emission concentrations remain consistently below the safety threshold.

[0027] Furthermore, the microwave radiators all have a frequency of 2.45 GHz and a power of 1-5 kW.

[0028] Beneficial effects: The 2.45GHz microwave frequency is precisely matched to the resonant frequency band of most adsorbent materials. Combined with the 1-5kW gradient power adjustment, it can achieve targeted excitation of polar molecules inside the material during deep desorption (penetration depth up to 15-20cm), and stabilize the desorption temperature within a safe range through power adaptive control to prevent material sintering and deactivation.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 This is a flowchart of an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling according to the present invention; Figure 2 This is an isometric view of the treatment device in an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention. Figure 3 This is a side view of the treatment device in an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention. Figure 4 This is a half-sectional view of part A of an embodiment of the non-methane total hydrocarbon harmless treatment device for rubber recycling of the present invention. Figure 5 This is a top view of the treatment device and a schematic diagram of its internal structure (dashed lines) of an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention. Figure 6 This is a front cross-sectional view of part B of an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention. Figure 7 This is an isometric view of the internal transmission structure of the processing device in an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention. Figure 8 This is a cross-sectional view of the internal structure of the catalytic adsorption layer in an embodiment of the harmless treatment device for non-methane total hydrocarbons in rubber recycling of the present invention.

[0031] The reference numerals in the accompanying drawings include: 1. Main body; 2. First air intake pipe; 3. Main drive groove; 4. Second exhaust pipe; 5. Second air intake pipe; 6. Secondary drive groove; 7. First connecting rod; 8. Main counterweight wheel; 9. First pulley; 10. Second gear; 11. First gear; 12. Desorption chamber; 13. Catalytic adsorption layer; 14. Microwave radiator; 15. Exhaust gas purification channel; 16. First rotating shaft; 17. Second pulley; 18. Fourth rotating shaft; 19. Secondary piston cylinder; 20. Second connecting rod; 21. Secondary counterweight wheel; 22. Main piston cylinder; 23. Fourth gear; 24. Third gear; 25. Second rotating shaft; 26. Starting cam; 27. Vibrating block; 28. Scraper rod. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The following detailed description illustrates the specific implementation method: Example 1: As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown: A harmless treatment device for non-methane total hydrocarbons in rubber recycling includes a combustion section for thermally decomposing the rubber and a filtration and cooling section for cooling and filtering the waste gas formed after the thermal decomposition of the rubber; it also includes a treatment device for adsorption and purification of the waste gas, the treatment device including a waste heat recovery section and a purification section, the waste gas generated by the combustion section is discharged after passing through the waste heat recovery section-filtration and cooling section-purification section in sequence.

[0036] The purification unit includes a main body 1, inside which is a waste gas purification channel 15. The two ends of the waste gas purification channel 15 are respectively connected to a first inlet pipe 2 and a first exhaust pipe. Inside the main body 1, along the length of the waste gas purification channel 15, there are several adsorption components arranged linearly for catalytic adsorption of non-methane total hydrocarbon gases in the waste gas. Inside the main body 1, along the length of the waste gas purification channel 15, there are several desorption chambers 12 corresponding to the adsorption components. Microwave radiators 14 for desorption and regeneration of the adsorption components are installed on the two inner side walls of the desorption chambers 12. The bottom of each desorption chamber 12 is provided with a return pipe connected to the combustion unit. The adsorption components are all rotatably coupled with the main body 1. The waste heat recovery unit includes a main drive tank 3 located on one side of the main body 1. A thermal chamber is opened in the bottom wall of the main drive tank 3. A thermal component is installed inside the thermal chamber to use the waste heat in the exhaust gas generated by the combustion unit as an energy source to drive the adsorption component to rotate.

[0037] All adsorption components include a catalytic adsorption layer 13, which has a multi-layer structure (composed of an activated carbon-based material layer, a zeolite molecular sieve layer, and a honeycomb ceramic support). In order to increase the rapid degradation of some organic compounds in non-methane total hydrocarbons, noble metal catalysts (such as platinum Pt, palladium Pd, and rhodium Rh) and transition metal oxides (such as copper manganese oxides and titanium-based oxides) can be coated on the surface of the catalytic adsorption layer 13. All catalytic adsorption layers 13 are coaxially fixedly connected to the thermal components.

[0038] For the purification of non-methane total hydrocarbons in rubber recycling using traditional adsorption methods (which selectively adsorb pollutants such as hydrocarbons and oxygen-containing organic matter in waste gas through adsorption materials such as activated carbon and molecular sieves to achieve emission standards), although the non-methane total hydrocarbon removal rate can reach more than 90% and easily meet the emission limits of national standards (such as GB31572-2015), the frequency of replacement of adsorption materials will also increase with the increase in the amount of waste gas processed, thereby increasing the processing cost.

[0039] Therefore, in this scheme, the catalytic adsorption layer 13 is symmetrically placed in the waste gas purification channel 15 and the desorption chamber 12 (i.e., located in the adsorption zone and desorption zone, respectively). Several microwave radiators 14 are installed on both inner sidewalls of the desorption chamber 12. Simultaneously, the microwave radiators 14 all have a frequency of 2.45 GHz and a power of 1-5 kW, thus precisely matching the resonant frequency band of most adsorption material molecules. Combined with a 1-5 kW gradient power adjustment, this achieves targeted excitation of polar molecules inside the material during deep desorption (penetration depth reaches 15-20 cm), and stabilizes the desorption temperature within a safe range through power adaptive control, preventing material sintering and deactivation. Furthermore, the residual heat (150~500℃, depending on the process stage and material type) contained in the waste gas (NMHC) generated after the rubber pyrolysis in the combustion section is used to drive the movement of the thermal component, causing the catalytic adsorption layer 13 to rotate. This allows it to alternate between the adsorption zone and the desorption zone, achieving simultaneous waste gas purification and desorption regeneration, thereby reducing the frequency of adsorption material replacement.

[0040] Simultaneously, the high-concentration exhaust gas formed in the desorption chamber 12 after desorption flows to the combustion chamber through the return pipe for secondary combustion treatment. Furthermore, to increase the overall waste treatment efficiency, a MnO2 / CeO2 catalyst can be installed in the return pipe. Additionally, a VOCs concentration sensor is installed inside the first exhaust pipe. This VOCs concentration sensor, along with the combustion unit and return pipe, forms a closed-loop control system to monitor exhaust gas data in real time. This helps staff understand the efficiency of the entire device in the harmless treatment of non-methane total hydrocarbons in rubber recycling, forming a dynamic negative feedback mechanism of emission exceeding standards – regeneration enhancement – ​​combustion reuse, ensuring that the emission concentration remains consistently below the safety threshold.

[0041] Specifically, in combination Figure 4 , Figure 5 and Figure 7 As shown, the thermal component includes a first rotating shaft 16, which is coaxially and fixedly connected to the catalytic adsorption layer 13 and is disposed between the exhaust gas purification channel 15 and the desorption chamber 12 and rotates with the main body 1. The main body 1 has a first transmission cavity and a second transmission cavity inside. One end of the first rotating shaft 16 extends into the first transmission cavity and is coaxially fixedly connected to a first gear 11. The first gear 11 meshes with a second gear 10. The second gear 10 is coaxially fixedly connected to a second rotating shaft 25 that rotates with the main body 1. One end of the second rotating shaft 25 extends into the second transmission cavity and is coaxially fixedly connected to a third gear 24. The third gear 24 meshes with a fourth gear 23. The fourth gear 23 is coaxially fixedly connected to a third rotating shaft. One end of the third rotating shaft extends into the main drive groove 3 and is coaxially fixedly connected to a first pulley 9. The first pulley 9 is belt-driven and connected to a second pulley 17. The second pulley 17 is coaxially fixedly connected to a fourth rotating shaft 18. The number of teeth on the first gear 11 is greater than the number of teeth on the fourth gear 23, forming a reduction mechanism. This causes the main counterweight wheel 8 to rotate at a high speed while the catalytic adsorption layer 13 rotates at a low speed. This ensures that the exhaust gas in the exhaust gas purification channel 15 stays on the surface of the catalytic adsorption layer 13 for a sufficient time (0.8-1.2 seconds), thus avoiding airflow disturbance caused by excessively high rotation speed from affecting the efficiency of catalytic adsorption and desorption regeneration.

[0042] One side of the main body 1 has a secondary drive groove 6 opposite to the main drive groove 3. One end of the fourth rotating shaft 18 is coaxially fixedly connected to the main counterweight wheel 8 located in the main drive groove 3. The other end of the fourth rotating shaft 18 extends into the secondary drive groove 6 and is coaxially bolted to the secondary counterweight wheel 21. The diameter of the main counterweight wheel 8 is larger than the diameter of the secondary counterweight wheel 21. Thus, by using the larger wheel to drive the smaller wheel, the torque of the main counterweight wheel 8 when it starts can drive the entire thermodynamic drive mechanism.

[0043] The main counterweight wheel 8 is eccentrically hinged to a first connecting rod 7, and a first piston is hinged to the end of the first connecting rod 7 away from the main counterweight wheel 8; the secondary counterweight wheel 21 is eccentrically hinged to a second connecting rod 20, and a second piston is hinged to the end of the second connecting rod 20 away from the secondary counterweight wheel 21; the main body 1 has a main moving cavity and a secondary moving cavity respectively, and both the main moving cavity and the secondary moving cavity are located below the main drive groove 3. The thermomagnetic coupling effect of microwave radiation on the seals of the first piston and the second piston is blocked by physical isolation, which prevents the high-frequency electromagnetic field from causing eddy current heating of the metal components and ensures the normal movement of the first piston and the second piston. A main piston cylinder 22 and an auxiliary piston cylinder 19 are respectively installed in the main moving cavity and the auxiliary moving cavity. The first piston and the second piston are located in the main piston cylinder 22 and the auxiliary piston cylinder 19, respectively. The upper end of the main piston cylinder 22 is connected to the bottom end of the auxiliary piston cylinder 19. The first piston and the second piston slide with the inner walls of the main piston cylinder 22 and the auxiliary piston cylinder 19, respectively. At the same time, the phase difference between the first piston and the second piston is 90°, forming a four-stroke alternating compensation mechanism. The transmission dead zone is eliminated by the superposition of sine and cosine power, so that the gear set can obtain uninterrupted torque input.

[0044] The main moving chamber is connected to a second intake pipe 5 and a second exhaust pipe 4. The first intake pipe 2 is connected to the second exhaust pipe 4, and the second intake pipe 5 is connected to the combustion section.

[0045] The specific motion process is as follows: The high-temperature exhaust gas (200-300℃) generated by the combustion section enters the main moving chamber through the second intake pipe 5, heating the gas inside the main piston cylinder 22 and causing it to expand (the high-temperature gas does not enter the main piston cylinder 22, but only passes through the surface of the main piston cylinder 22 and heats the gas inside the main piston cylinder 22), pushing the first piston to move upward. The first piston, through the first connecting rod 7, pushes the main counterweight wheel 8 to rotate eccentrically. At this time, the main counterweight wheel 8 drives the auxiliary counterweight wheel 21 to rotate, and the auxiliary counterweight wheel 21 drives the second connecting rod 20 to move the second piston upward. Then, the hot gas in the main piston cylinder 22 flows in from the bottom of the auxiliary piston cylinder 19 for cooling. After the hot gas cools down, its volume decreases, causing the second piston to move downward. Through the 90° phase difference between the first piston and the second piston, the main counterweight wheel 8 and the auxiliary counterweight wheel 21 rotate continuously, synchronously driving the fourth rotating shaft 18 and the second pulley 17 to rotate. The aforementioned driving process forms an α-type Stirling engine structure (two cylinders serve as the hot and cold ends, respectively, with one piston in each cylinder) to recover and utilize thermal energy.

[0046] When the second pulley 17 rotates, it causes the first pulley 9 to rotate via belt drive, which in turn drives the third shaft and the fourth gear 23 to rotate. The fourth gear 23 synchronously drives the third gear 24, which meshes with it, to rotate, and then causes the second shaft 25 to rotate. When the second shaft 25 rotates, it drives the second gear 10 to rotate, and then the second gear 10 drives the first gear 11, which meshes with it, to rotate, thereby driving the first shaft 16 and several catalytic adsorption layers 13 coaxially fixed on the first shaft 16. This allows multiple catalytic adsorption layers 13 to operate alternately in the exhaust gas purification channel 15 and the desorption chamber 12, forming a multi-stage treatment and improving the recovery effect.

[0047] Since the initial start-up of the entire thermodynamic drive structure requires external force intervention to operate normally, a starter motor is installed in the main drive slot 3. The output shaft of the starter motor is coaxially fixedly connected to the starter cam 26. The main counterweight wheel 8 is located within the motion trajectory of the starter cam 26. After the exhaust gas flows through the main moving chamber for a period of time (that is, the internal temperature of the main piston cylinder 22 is heated to the drive threshold temperature), the starter motor is turned on, causing the starter cam 26 to rotate. This causes the raised edge of the starter cam 26 to rub against the main counterweight wheel 8, causing it to rotate at a certain angle (initial start angle). Then the motor is stopped, causing the starter cam 26 to disengage from the motion trajectory of the main counterweight wheel 8, thus avoiding manual intervention and improving convenience and safety.

[0048] Example 2: The difference from the above embodiments is that, as Figure 4 and Figure 8 As shown in Example 1, the catalytic adsorption layer 13 has a multi-layer structure, consisting of an activated carbon-based material layer, a zeolite molecular sieve layer, and a honeycomb ceramic carrier. An annular chamber is formed between each pair of adsorption layers. The annular chamber is divided into a vibration chamber and an adsorption chamber from the inside out. Several vibration blocks 27 are arranged in a circumferential array in the vibration chamber. Springs are welded to both ends of the vibration blocks 27, and the other end of the springs is welded to the inner wall of the vibration chamber. Several scrapers 28 are welded to the end of the vibration blocks 27 away from the first rotating shaft 16. The scrapers 28 extend into the adsorption chamber and contact the inner wall of the adsorption chamber at the end away from the vibration blocks 27. When the catalytic adsorption layer 13 rotates, the vibrating block 27 inside it shifts outward due to the centripetal force. At the same time, it is limited by the presence of springs. As the catalytic adsorption layer 13 rotates, the vector direction of its centripetal inertial force and its own gravity also changes. When the vibrating block 27 revolves to the highest point (centripetal inertial force - gravity), and when the vibrating block 27 revolves to the lowest point (centripetal inertial force + gravity), the position of the vibrating block 27 changes periodically during the rotation, forming micro-vibrations of the catalytic adsorption layer 13. When the exhaust gas passes through the catalytic adsorption layer 13, these micro-vibrations cause a certain disturbance in the exhaust gas in the catalytic adsorption layer 13, increasing the residence time, increasing the collision frequency of gas molecules with the surface catalyst, improving the catalytic purification efficiency, and at the same time, the vibration energy can be used to help the desorption reaction proceed quickly. As the pyrolysis temperature rises, both the quantity and temperature of the waste gas increase. The increased waste gas temperature provides more driving energy to the thermal mechanism, increasing the rotational speed of the main counterweight wheel 8, which in turn increases the rotational speed of the catalytic adsorption layer 13. This, in turn, increases the displacement amplitude of the vibrating block 27, thereby increasing the micro-vibration amplitude of the catalytic adsorption layer 13 and further increasing the collision efficiency between the catalytic adsorption layer 13 and the waste gas, thus improving the adsorption and catalytic effect. Simultaneously, when the vibrating block 27 vibrates, the scraper 28 reciprocates within the adsorption chamber, forming a scraping action that cleans dust from the adjacent sides of the adsorption layer, increasing the adsorption and filtration effect of the waste gas. The multiple annular chambers also increase the residence time of the waste gas within the catalytic adsorption layer 13, further improving the adsorption and filtration efficiency. Furthermore, the reciprocating motion of the scraper 28 within the adsorption chamber disturbs the airflow, increasing the movement between the waste gas and the catalytic adsorption layer 13, thereby increasing the contact area between them and further improving the catalytic efficiency.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for non-hazardous treatment of non-methane hydrocarbons in rubber recycling, comprising a combustion section for thermal decomposition of rubber and a filter-cooling section for cooling and filtering of exhaust gas formed after thermal decomposition of rubber, characterized in that, The treatment device for adsorbing and purifying the exhaust gas comprises a waste heat recovery part and a purification part, and the exhaust gas generated by the combustion part is sequentially discharged through the waste heat recovery part, the filter cooling part and the purification part; The purification part comprises a main body (1), the inside of the main body (1) is provided with an exhaust gas purification channel (15), the two ends of the exhaust gas purification channel (15) are respectively communicated with a first air inlet pipe (2) and a first air outlet pipe, a plurality of adsorption assemblies for catalytically adsorbing non-methane total hydrocarbon gas in the exhaust gas are linearly arranged in the inside of the main body (1) along the length direction of the exhaust gas purification channel (15), a plurality of desorption cavities (12) corresponding to the adsorption assemblies are linearly arranged in the inside of the main body (1) along the length direction of the exhaust gas purification channel (15), a plurality of microwave radiators (14) for desorbing and regenerating the adsorption assemblies are arranged on the two inner side walls of the desorption cavities (12), and the bottom of each desorption cavity (12) is provided with a reflux pipe communicated with the combustion part; and the adsorption assemblies are rotationally matched with the main body (1). The waste heat recovery part comprises a main drive groove (3) opened on one side of the main body (1), a thermal cavity is opened in the inner bottom wall of the main drive groove (3), and a thermal component for driving the adsorption assemblies to rotate by taking the waste heat in the exhaust gas generated by the combustion part as energy is arranged in the inside of the thermal cavity.

2. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 1, characterized in that: The adsorption assemblies each comprise a catalytic adsorption layer (13), and the catalytic adsorption layer (13) is coaxially fixedly connected with the thermal component.

3. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 2, characterized in that: The thermal component comprises a first rotating shaft (16), the first rotating shaft (16) is coaxially fixedly connected with the catalytic adsorption layer (13), the first rotating shaft (16) is arranged between the exhaust gas purification channel (15) and the desorption cavity (12), and the first rotating shaft (16) is rotationally matched with the main body (1); The inside of the main body (1) is provided with a first transmission cavity and a second transmission cavity, one end of the first rotating shaft (16) extends into the first transmission cavity and is coaxially fixedly connected with a first gear (11), the first gear (11) is engaged with a second gear (10), the second gear (10) is coaxially fixedly connected with a second rotating shaft (25) rotationally matched with the main body (1), one end of the second rotating shaft (25) extends into the second transmission cavity and is coaxially fixedly connected with a third gear (24), the third gear (24) is engaged with a fourth gear (23), the fourth gear (23) is coaxially fixedly connected with a third rotating shaft, one end of the third rotating shaft extends into the main drive groove (3) and is coaxially fixedly connected with a first pulley (9), the first pulley (9) is drivingly connected with a second pulley (17), the second pulley (17) is coaxially fixedly connected with a fourth rotating shaft (18); One side of the main body (1) is provided with a secondary drive groove (6) opposite to the main drive groove (3), one end of the fourth rotating shaft (18) is coaxially fixedly connected with a main counterweight wheel (8) located in the main drive groove (3), and the other end of the fourth rotating shaft (18) extends into the secondary drive groove (6) and is coaxially fixedly connected with a secondary counterweight wheel (21). The main counterweight wheel (8) is eccentrically hinged with a first connecting rod (7), and the first connecting rod (7) is hinged with a first piston at one end away from the main counterweight wheel (8); the auxiliary counterweight wheel (21) is eccentrically hinged with a second connecting rod (20), and the second connecting rod (20) is hinged with a second piston at one end away from the auxiliary counterweight wheel (21); the main body (1) is internally divided into a main moving cavity and an auxiliary moving cavity, and the main moving cavity and the auxiliary moving cavity are respectively provided with a main piston cylinder (22) and an auxiliary piston cylinder (19); the first piston and the second piston are respectively located in the main piston cylinder (22) and the auxiliary piston cylinder (19), and the first piston and the second piston are respectively in sliding fit with the inner walls of the main piston cylinder (22) and the auxiliary piston cylinder (19); The main moving cavity is communicated with a second air inlet pipe (5) and a second air outlet pipe (4), the first air inlet pipe (2) is communicated with the second air outlet pipe (4), and the second air inlet pipe (5) is communicated to the combustion part.

4. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 3, characterized by: The diameter of the main counterweight wheel (8) is greater than the diameter of the auxiliary counterweight wheel (21).

5. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 4, characterized by: A starting motor is arranged in the main driving groove (3), and the output shaft of the starting motor is coaxially fixedly connected with a starting cam (26), and the main counterweight wheel (8) is located in the movement track of the starting cam (26).

6. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 5, characterized in that: The number of teeth of the first gear (11) is greater than the number of teeth of the fourth gear (23).

7. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 6, characterized in that: The main moving cavity and the auxiliary moving cavity are both located below the main driving groove (3).

8. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 7, characterized in that: The phase difference between the first piston and the second piston is 90°.

9. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 8, characterized by: A VOCs concentration sensor is arranged in the first air outlet pipe.

10. The rubber recycling non-methane hydrocarbon harmless treatment device according to claim 9, characterized by: The microwave radiators (14) all have a frequency of 2.45GHz and a power of 1-5kW.

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