Chemical production safety process volatile organic compound recovery and purification device

Abstract

This invention relates to the field of gaseous organic compound purification technology, and discloses a device for the recovery and purification of volatile organic compounds (VOCs) in chemical safety production processes. The device includes: two filtration mechanisms capable of filtering VOC gases generated during chemical safety production; and a first tube body capable of guiding the VOC gases from the chemical safety production process to the filtration mechanisms. This device utilizes a first plate inside the first tube body. When the flow rate of the mixed gas inside the first tube body increases, the airflow impacts the first plate body, overcoming the tension of a third spring and deflecting it. This deflection drives a gear accelerator to rotate via a first rod, thereby increasing the opening of a flow regulating valve inside the third tube body. This achieves the effect of automatically increasing the coolant flow rate with the exhaust gas load, ensuring the stability of the condensation efficiency.

Description

Technical Field

[0001] This invention relates to the field of gaseous organic matter purification technology, specifically to a device for the recovery and purification of volatile organic compounds in chemical safety production processes. Background Technology

[0002] The recovery and purification of volatile organic compounds (VOCs) is a key link in ensuring safe production and meeting environmental emission standards in the chemical industry. Among the existing chemical waste gas treatment processes, adsorption technology is widely used because it can effectively recover high-value solvents.

[0003] However, traditional adsorption devices mostly adopt a fixed-bed structure (i.e., the adsorbent material is statically stacked inside the chamber), which has the following problems in actual chemical production processes: During the adsorption process, chemical waste gas releases a large amount of adsorption heat. In a fixed bed structure, due to the relatively fixed gas flow path, "dead zones" or "flow deviations" are easily formed inside the bed. As the amount of adsorption increases, heat accumulates rapidly in local areas, forming "hot spots." For flammable adsorption media such as activated carbon, this local high temperature can easily cause smoldering or even spontaneous combustion, posing a serious production safety hazard in chemical explosion-proof environments.

[0004] To address the aforementioned risks of thermal buildup, existing chemical safety systems typically deploy multiple electronic temperature sensors (such as thermocouples and resistance temperature detectors) and combustible gas concentration monitors (LEL detectors) within the adsorption unit. While these electronic monitoring systems can provide data feedback under normal operating conditions, in the initial stages of a chemical fire or explosion, there is often a sudden power outage affecting the entire plant or the instantaneous burning of power cables. At this time, sensors and actuators (such as solenoid valves) that rely on electrical signal transmission will be completely paralyzed. Even if there is an emergency power supply in the monitoring room, sensors are highly susceptible to signal drift or physical damage in high-temperature melting or dense smoke environments, causing the safety system to become "blinded" at the most critical moment of hazard avoidance.

[0005] Furthermore, although most existing sensors adopt explosion-proof designs (such as explosion-proof or intrinsically safe types), during long-term maintenance, aging of the housing, loose wiring, or failure of the seal may still make them potential "ignition points." In dynamic environments with drastic fluctuations in VOC concentration, theoretically, it is impossible to achieve 100% physical isolation and safety for every signal pulse and opening / closing action of electronic components. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a device for the recovery and purification of volatile organic compounds (VOCs) in chemical production processes. This device can recover and purify VOCs generated during chemical production without relying on external power supply and possesses a purely mechanical circuit-breaking capability with inherent safety characteristics.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a volatile organic compound recovery and purification device for chemical safety production processes, comprising: Two filtration mechanisms are used to filter volatile organic compounds generated during chemical safety production processes. The first tube body is capable of guiding volatile organic compounds from chemical safety production processes to the filtration mechanism. The diversion mechanism can close the first filter after the filter medium inside the first filter reaches the set temperature, and direct the volatile organic compounds generated in the chemical safety production process to the second filter. The emergency circuit breaker mechanism can drive the diversion mechanism to shut down the first filter mechanism after the filter medium inside the first filter mechanism reaches the set temperature.

[0008] Furthermore, it also includes: A cooling mechanism that can cool volatile organic compounds filtered from inside the two filtration mechanisms; The power recovery mechanism can change the flow rate of the cooling mechanism according to the flow rate of volatile organic compounds flowing inside the first tube.

[0009] Furthermore, the filtration mechanism includes a third housing, a first annular mesh wheel, a second plate, a second annular mesh wheel, a sixth plate, and several seventh plates. The third housing is cylindrical, with one end connected to the flow-dividing mechanism and the other end connected to the cooling mechanism. One side of the second plate is fixedly connected to the inner wall of the third housing near the flow-dividing mechanism, and the other side of the second plate is fixedly connected to one end of the first annular mesh wheel, the second annular mesh wheel, and several seventh plates. The other ends of the first annular mesh wheel, the second annular mesh wheel, and several seventh plates are fixedly connected to one side of the sixth plate. The first and second annular mesh wheels are arranged concentrically, with the second annular mesh wheel located inside the first annular mesh wheel. The two ends of several seventh plates are fixedly connected to the adjacent sides of the first and second annular mesh wheels, respectively, and the several seventh plates are equidistantly distributed between the first and second annular mesh wheels. The flow-dividing mechanism, the third housing, and the cooling mechanism are internally connected, and the filter medium is located between the first and second annular mesh wheels.

[0010] Furthermore, the diversion mechanism includes a second housing, a main / backup channel switching assembly, a herringbone frame, a fifth plate, and two second pipes. One end of the second housing is fastened to the first pipe via a first flange, and the other end of the second housing is fixedly connected to the same end of both second pipes. The other ends of the two second pipes are fastened to the two third housings via two second flanges respectively. The fifth plate is fixedly connected to the inner wall of the second housing and separates the second housing into two first cavities. The outer wall of the herringbone frame is fixedly connected to the inner wall of the second housing, and both ends of the herringbone frame are located in the two first cavities respectively. The herringbone frame is located above the main / backup channel switching assembly and the fifth plate. The first pipe, the second housing, the second pipe, and the third housing are internally connected.

[0011] Furthermore, the main / backup channel switching assembly includes a second rod and a herringbone plate. Both ends of the second rod are rotatably connected to the second housing via a first sealed bearing. The middle part of the second rod is fixedly connected to the middle part of the herringbone plate. The two ends of the herringbone plate are located in the two first cavities respectively, and the side wall of the herringbone plate abuts against the side wall of the herringbone frame.

[0012] Furthermore, the emergency circuit breaker mechanism includes a pushing component, a releasing component, and a heat transfer component. The pushing component is located in one of the first cavities, and one end of the pushing component is connected to the fifth plate. The other end of the pushing component is connected to one end of the releasing component, and the other end of the releasing component is connected to one end of the heat transfer component. The other end of the heat transfer component passes through the second tube to the interior of the third housing and is located between the first annular mesh wheel and the second annular mesh wheel.

[0013] Furthermore, the second housing has a through-hole that communicates with the first cavity on the side near the push assembly. An observation window is provided inside the through-hole via a fourth flange. The end of the herringbone plate near the push assembly is heavier than the other end.

[0014] Furthermore, the pushing component includes a first block, a third plate, a fourth plate, a second block, several third rods, and several first springs. One side of the third plate is fixedly connected to the side wall of the fifth plate. One end of the second block is connected to the loosening component, and the other end of the second block is fixedly connected to one end of the fourth plate. The surface of the fourth plate is fixedly connected to the same end of several third rods. The other ends of several third rods all penetrate the third plate and are fixedly connected to one side of the first block. The other side of the first block abuts against the side of the herringbone plate away from the herringbone frame. The cross-section of the first block on the first surface is a right trapezoid, wherein the oblique angle of the right trapezoid faces the herringbone plate and the oblique angle of the right trapezoid matches the herringbone plate. The first surface is perpendicular to the plane of the fifth plate. The two ends of several first springs are fixedly connected to the adjacent sides of the first block and the fourth plate, respectively.

[0015] Furthermore, the first spring is a high-strength spring, and the sum of the weight of the herringbone plate and the impact force of the mixed gas is less than the thrust of the first spring.

[0016] Furthermore, the detachment assembly includes a third block, a first magnet, a fourth rod, an insulated bellows cover, a second magnet, a fifth rod, a second spring, and a fifth block. One side of the fourth block and one side of the fifth block are fixedly connected to the side wall of the fifth plate. The side of the fourth block near the herringbone plate is fixedly connected to the same end of the second spring and the insulated bellows cover. The other ends of the second spring and the insulated bellows cover are fixedly connected to one end of the third block. The other end of the third block and the side wall of the first magnet are both provided with openings. The fifth block is fitted and slidably connected to the outer wall of one end of the fourth rod. The other end of the fourth rod passes through the opening of the third block and the first magnet and is fixedly connected to one end of the second magnet. The other end of the second magnet is fixedly connected to one end of the fifth rod. The other end of the fifth rod passes through the second block and is slidably connected to the second block. The side of the first magnet away from the second magnet is fixedly connected to the end of the third block away from the second spring. The first magnet and the second magnet attract each other.

[0017] Furthermore, the second spring is a shape memory alloy spring, and the normal state of the second spring is a compressed state.

[0018] Furthermore, the heat transfer assembly includes a first heat-conducting wire and several second heat-conducting wires. One end of the first heat-conducting wire is located inside the heat-insulating bellows cover and abuts against the second spring. Several grooves are opened inside the sixth plate. The other end of the first heat-conducting wire passes through the second tube into the groove and is fixedly connected to one end of each of the several second heat-conducting wires. The other ends of the several second heat-conducting wires pass through the several grooves to the space between the first annular mesh wheel and the second annular mesh wheel.

[0019] Furthermore, the cooling mechanism includes a third tube body, a fourth housing, a fifth housing, a fourth tube body, a fifth tube body, and a tube side. One end of the fourth housing is fastened to the ends of the two third housings away from the second tube body through two third flanges. The other end of the fourth housing is fixedly connected to one end of the fifth housing. The surface of the fifth housing is fixedly connected to one end of the third, fourth, and fifth tube bodies. Both ends of the tube side are fixedly connected to the inner wall of the fifth housing. The third housing, fourth housing, tube side, and fifth tube body are internally connected, and a one-way valve is provided at the connection between the third housing and the fourth housing. The third tube body, fifth housing, and fourth tube body are internally connected, and a flow regulating valve is provided inside the third tube body.

[0020] Furthermore, the power recovery mechanism includes a first housing, a gear accelerator, a first plate, a first rod, and at least one third spring. One end of the first housing is fixedly connected to the middle of the first tube, and the first housing communicates with the interior of the first tube. The first plate and the first rod are both located inside the first housing. One end of the first plate is located inside the first tube, and the other end of the first plate is fixedly connected to the middle of the first rod. One end of the first rod extends through to the outside of the first housing and is fixedly connected to the input end of the gear accelerator. The output end of the gear accelerator is connected to the valve stem of the flow regulating valve via a chain sprocket. The first rod is rotatably connected to the penetration point of the first housing via a second sealed bearing. The same end of each third spring is fixedly connected to the end of the first plate away from the first rod, and the other end of each third spring is fixedly connected to the first housing.

[0021] Compared with the prior art, the present invention has the following beneficial effects: This chemical safety production process volatile organic compound recovery and purification device uses a first plate inside the first pipe body. When the flow rate of the mixed gas inside the first pipe body increases, the airflow impacts the first plate and overcomes the tension of the third spring, causing it to deflect. This deflection is then driven by the first rod to rotate the gear accelerator, thereby increasing the opening of the flow regulating valve inside the third pipe body. This achieves the effect of automatically increasing the coolant flow rate with the exhaust gas load, ensuring the stability of the condensation efficiency. This chemical safety production process volatile organic compound recovery and purification device guides the mixed gas to one of the filtration mechanisms through a diversion mechanism. The mixed gas passes through the adsorption space formed by the first and second annular mesh wheels. Through the physical capture of organic molecules by the filter medium, the organic gas is separated from the air, allowing pure air to pass through and be discharged smoothly. This chemical safety production process volatile organic compound recovery and purification device uses several second heat-conducting wires arranged between the first and second annular mesh wheels to collect the real-time temperature of the adsorption layer and transfer the heat to the inside of the heat-insulating bellows cover through the first heat-conducting wires, thereby achieving the effect of real-time conduction of deep adsorption heat to the triggering mechanism. This chemical safety production process volatile organic compound recovery and purification device uses a second spring (memory alloy spring) to sense the heat transferred by the first heat-conducting wire. When the temperature reaches the phase change threshold, the second spring expands and pushes the first magnet to attract the second magnet. The fifth rod is removed, thus removing the restriction on the second block and achieving the effect of instantaneously releasing kinetic energy using the powerful first spring. This chemical safety production process volatile organic compound recovery and purification device achieves the effect of instantly cutting off the main filtration channel and opening the backup filtration channel by having the first block hit the heavier end of the herringbone plate, causing the herringbone plate to quickly rotate around the second rod and re-engage with the herringbone frame. This ensures the absolute safety of the system in the event of a "flying temperature" risk. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the overall appearance of the invention from another perspective; Figure 3 For the present invention Figure 1 A three-dimensional cross-sectional view of the middle part; Figure 4 For the present invention Figure 3 Front view of each component; Figure 5 This is a cross-sectional and exploded view of the first tube body and various components of the power recovery mechanism of the present invention; Figure 6 This is a cross-sectional and exploded view of the components of the cooling mechanism of the present invention; Figure 7 This is a detailed connection diagram of the components of the present invention, including the diversion mechanism, the filtering mechanism, and the emergency circuit breaker mechanism. Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a cross-sectional and exploded view of the diversion mechanism, the third plate, and the fourth block of the present invention. Figure 10 This is a cross-sectional and exploded view of the components of the emergency circuit breaking mechanism of the present invention; Figure 11 This is a cross-sectional and exploded view of the components of the filtration mechanism of the present invention; Figure 12 For the present invention Figure 11 Further explosion diagram of the middle part.

[0023] In the picture: 1. The first tube body; 2. Power recovery mechanism; 21. First housing; 22. Gear accelerator; 23. First plate; 24. First rod; 25. Third spring; 3. Diversion mechanism; 31. Second housing; 311. Port; 32. Second pipe body; 33. Main / backup channel switching assembly; 331. Second rod body; 332. Herringbone plate body; 34. Herringbone frame body; 35. Fifth plate body; 4. Filtering mechanism; 41. Third housing; 42. First annular mesh wheel; 43. Second plate; 44. Second annular mesh wheel; 45. Sixth plate; 451. Tank; 46. Seventh plate; 5. Cooling mechanism; 51. Third tube body; 52. Fourth shell; 53. Fifth shell; 54. Fourth tube body; 55. Fifth tube body; 56. Tube side; 6. Emergency circuit breaker mechanism; 61. Pushing assembly; 611. First block; 612. Third rod; 613. First spring; 614. Third plate; 615. Fourth plate; 616. Second block; 62. Release assembly; 621. Third block; 622. First magnet; 623. Fourth rod; 624. Insulated bellows cover; 625. Fourth block; 626. Second magnet; 627. Fifth rod; 628. Second spring; 629. Fifth block; 63. Heat transfer assembly; 631. First heat-conducting wire; 632. Second heat-conducting wire. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Please see Figures 1-12 Chemical safety production process volatile organic compound recovery and purification device, including: Two filtration units 4, which are capable of filtering volatile organic compounds generated during chemical safety production processes; The first tube 1 is capable of guiding volatile organic compounds from the chemical safety production process to the filtration mechanism 4. The diversion mechanism 3 can close the first filter mechanism 4 after the filter medium inside the first filter mechanism 4 reaches the set temperature, and guide the volatile organic compounds generated in the chemical safety production process to the second filter mechanism 4. The emergency circuit breaker mechanism 6 can drive the diversion mechanism 3 to close the first filter mechanism 4 after the filter medium inside the first filter mechanism 4 reaches the set temperature.

[0026] Also includes: Cooling mechanism 5, which is capable of cooling volatile organic compounds filtered from inside the two filtration mechanisms 4; The power recovery mechanism 2 can change the flow rate of the cooling mechanism 5 according to the flow rate of volatile organic gas flowing inside the first tube 1.

[0027] Furthermore, in order to enable the filtration mechanism 4 to filter volatile organic compounds generated during the chemical safety production process, as a preferred embodiment of the present invention, the filtration mechanism 4 includes a third housing 41, a first annular mesh wheel 42, a second plate 43, a second annular mesh wheel 44, a sixth plate 45, and several seventh plates 46. The third housing 41 is cylindrical, one end of the third housing 41 is connected to the flow distribution mechanism 3, and the other end of the third housing 41 is connected to the cooling mechanism 5. One side of the second plate 43 is fixedly connected to the inner wall of the third housing 41 near the flow distribution mechanism 3, and the other side of the second plate 43 is connected to the first annular mesh wheel 42, the second annular mesh wheel 44, and the several seventh plates 46. One end of each of the first annular mesh wheel 42, the second annular mesh wheel 44, and the other end of each of the seventh plates 46 are fixedly connected to one side of the sixth plate 45. The first annular mesh wheel 42 and the second annular mesh wheel 44 are arranged in concentric circles, and the second annular mesh wheel 44 is located inside the first annular mesh wheel 42. The two ends of each of the seventh plates 46 are fixedly connected to the adjacent side of the first annular mesh wheel 42 and the second annular mesh wheel 44, and the seventh plates 46 are equidistantly distributed between the first annular mesh wheel 42 and the second annular mesh wheel 44. The flow diversion mechanism 3, the third housing 41, and the cooling mechanism 5 are internally connected, and the filter medium is located between the first annular mesh wheel 42 and the second annular mesh wheel 44. Specifically, such as Figures 1-4 , Figure 7 , Figure 11 and Figure 12 As shown, during use, the volatile organic compound mixture (hereinafter referred to as the mixed gas) in the chemical safety production process enters the second annular mesh wheel 44 inside the third shell 41 through the first pipe 1 and the diversion mechanism 3. Then, this part of the mixed gas can pass through the second annular mesh wheel 44 and come into contact with the filter medium (such as activated carbon) located between the second annular mesh wheel 44 and the first annular mesh wheel 42. Because the air molecules (nitrogen and oxygen) in the mixed gas are very small and stable, they will pass directly through the gaps in the activated carbon and be discharged. The organic gas molecules (such as benzene, toluene, alcohol, etc.) will be "captured" by the countless micropores inside the activated carbon and temporarily stored inside, thereby achieving the separation of gases, making the gas that comes out clean (pure air), while the organic matter is "locked" in the activated carbon.

[0028] Furthermore, in order to enable the diversion mechanism 3 to close the first filter mechanism 4 after the filter medium inside the first filter mechanism 4 reaches the set temperature, and to guide the volatile organic compounds generated in the chemical safety production process to the second filter mechanism 4, as a preferred embodiment of the present invention, the diversion mechanism 3 includes a second housing 31, a main / backup channel switching assembly 33, a herringbone frame 34, a fifth plate 35, and two second pipes 32. One end of the second housing 31 is fastened to the first pipe 1 through a first flange, and the other end of the second housing 31 is connected to the same flange of the two second pipes 32. Both ends are fixedly connected. The other ends of the two second pipe bodies 32 are respectively fastened to the two third housings 41 through two second flanges. The fifth plate body 35 is fixedly connected to the inner wall of the second housing 31 and separates the second housing 31 into two first cavities. The outer wall of the herringbone frame 34 is fixedly connected to the inner wall of the second housing 31, and the two ends of the herringbone frame 34 are respectively located in the two first cavities. The herringbone frame 34 is located above the main and backup channel switching assembly 33 and the fifth plate body 35. The first pipe body 1, the second housing 31, the second pipe body 32 and the third housing 41 are internally connected. More specifically, the main / backup channel switching assembly 33 includes a second rod 331 and a herringbone plate 332. Both ends of the second rod 331 are rotatably connected to the second housing 31 through a first sealed bearing. The middle part of the second rod 331 is fixedly connected to the middle part of the herringbone plate 332. The two ends of the herringbone plate 332 are respectively located in two first cavities, and the side wall of the herringbone plate 332 abuts against the side wall of the herringbone frame 34. Specifically, such as Figures 1-4 , Figure 7 and Figure 9 As shown, during use, the mixed gas continues to move after entering the first tube 1 and then enters the second housing 31. Since the second housing 31 is divided into two first cavities by the fifth plate 35, and the two first cavities are also blocked by the herringbone plate 332, only one of the two first cavities is open during use (there may be a short period of dual flow during the switching of the herringbone plate 332, but it does not affect the overall structure; the specific switching method will be explained in detail later). Therefore, it can be simply understood that one is the main channel and the other is the backup channel in case of emergency.

[0029] Furthermore, in order to enable the emergency circuit breaker mechanism 6 to drive the diversion mechanism 3 to close the first filter mechanism 4 after the filter medium inside the first filter mechanism 4 reaches the set temperature, as a preferred embodiment of the present invention, the emergency circuit breaker mechanism 6 includes a pushing component 61, a releasing component 62, and a heat transfer component 63. The pushing component 61 is located in one of the first cavities, and one end of the pushing component 61 is connected to the fifth plate 35. The other end of the pushing component 61 is connected to one end of the releasing component 62. The other end of the releasing component 62 is connected to one end of the heat transfer component 63. The other end of the heat transfer component 63 passes through the second tube 32 to the interior of the third housing 41 and is located between the first annular mesh wheel 42 and the second annular mesh wheel 44. More specifically, the second housing 31 has a through opening 311 on the side near the push assembly 61 that communicates with the first cavity. An observation window is provided inside the through opening 311 through a fourth flange. The herringbone plate 332 is heavier at the end near the push assembly 61 than at the other end. More specifically, the actuating assembly 61 includes a first block 611, a third plate 614, a fourth plate 615, a second block 616, a plurality of third rods 612, and a plurality of first springs 613. One side of the third plate 614 is fixedly connected to the side wall of the fifth plate 35. One end of the second block 616 is connected to the release assembly 62, and the other end of the second block 616 is fixedly connected to one end of the fourth plate 615. The surface of the fourth plate 615 is fixedly connected to the same end of the plurality of third rods 612, and the other end of the plurality of third rods 612 is fixedly connected to the same end of the third rods 612. All ends penetrate the third plate 614 and are fixedly connected to one side of the first block 611. The other side of the first block 611 abuts against the side of the herringbone plate 332 away from the herringbone frame 34. The cross-section of the first block 611 on the first surface is a right trapezoid, wherein the oblique angle of the right trapezoid faces the herringbone plate 332 and the oblique angle of the right trapezoid matches the herringbone plate 332. The first surface is perpendicular to the plane of the fifth plate 35. The two ends of several first springs 613 are fixedly connected to the adjacent sides of the first block 611 and the fourth plate 615, respectively. More specifically, the first spring 613 is a high-strength spring, and the sum of the weight of the herringbone plate 332 and the impact force of the mixed gas is less than the thrust of the first spring 613; More specifically, the detachment assembly 62 includes a third block 621, a first magnet 622, a fourth rod 623, an insulated bellows cover 624, a fourth block 625, a second magnet 626, a fifth rod 627, a second spring 628, and a fifth block 629. One side of the fourth block 625 and one side of the fifth block 629 are fixedly connected to the side wall of the fifth plate 35. The side of the fourth block 625 near the herringbone plate 332 is fixedly connected to the same end of the second spring 628 and the insulated bellows cover 624. The other ends of the second spring 628 and the insulated bellows cover 624 are fixedly connected to one end of the third block 621. The other end of the third block 621... Both the end of the first magnet 622 and the side wall of the first magnet 622 are provided with openings. The fifth block 629 is sleeved and slidably connected to the outer wall of one end of the fourth rod 623. The other end of the fourth rod 623 passes through the opening of the third block 621 and the first magnet 622 and is fixedly connected to one end of the second magnet 626. The other end of the second magnet 626 is fixedly connected to one end of the fifth rod 627. The other end of the fifth rod 627 passes through the second block 616 and is slidably connected to the second block 616. The side of the first magnet 622 away from the second magnet 626 is fixedly connected to the end of the third block 621 away from the second spring 628. The first magnet 622 and the second magnet 626 attract each other. More specifically, the second spring 628 is a shape memory alloy spring, and the normal state of the second spring 628 is a compressed state; More specifically, the heat transfer assembly 63 includes a first heat-conducting wire 631 and a plurality of second heat-conducting wires 632. One end of the first heat-conducting wire 631 is located inside the heat-insulating bellows cover 624 and abuts against the second spring 628. A plurality of grooves 451 are provided inside the sixth plate 45. The other end of the first heat-conducting wire 631 passes through the second tube 32 into the groove 451 and is fixedly connected to one end of each of the plurality of second heat-conducting wires 632. The other ends of the plurality of second heat-conducting wires 632 pass through the plurality of grooves 451 to the space between the first annular mesh wheel 42 and the second annular mesh wheel 44. Specifically, such as Figure 3 , Figure 4 , Figures 7-10 As shown, in the early stage of use, the mixed gas flows through the main channel of the second shell 31 and enters the interior of the third shell 41 after passing through the second tube 32 of the corresponding channel. Then the mixed gas comes into contact with the activated carbon inside the third shell 41 and gradually heats up. While the activated carbon heats up, a number of second heat-conducting wires 632 located inside the activated carbon will uniformly introduce this part of the heat into the first heat-conducting wire 631 through the tank 451. Since the first heat-conducting wire 631 is directly exposed inside the second tube 32 and the second shell 31, the first heat-conducting wire 631 will be directly blown by the mixed gas, which can cool the first heat-conducting wire 631 first, thereby achieving the heat dissipation effect. Subsequently, as the production time increases, the heat of the first heat-conducting wire 631 increases. At this point, the heat dissipation effect of the mixed gas alone gradually deteriorates. Since the other end of the first heat-conducting wire 631 is located inside the heat-insulating bellows cover 624, the heat of the first heat-conducting wire 631 will gradually heat the second spring 628. Because the second spring 628 is a shape memory alloy spring, as the temperature of the second spring 628 increases, the second spring 628 will push the third block 621 and the first magnet 622 to rise together. When the first magnet 622 moves to align with the second magnet 626, the first magnet 622 and the second magnet 626 attract each other, thus "pulling" the second magnet 626 together with the fifth rod 627 toward the first magnet 622. As the fifth rod 627 moves away, the second block 616, which was originally "hung" by the fifth rod 627, loses the pulling force from below. Subsequently, the second block 616 can rise instantly under the action of several first springs 613, following the fourth plate 615. This allows the first block 611, located on the first spring 613 and the third rod 612, to directly impact the bottom surface of the heavier end of the herringbone plate 332 (the heavier end of the herringbone plate 332 is designed to ensure that this end faces downwards during normal use of the main channel, allowing all gas to flow through this path). This forces the heavier end of the herringbone plate 332 upwards, causing the herringbone plate 332 to rotate by the second rod 331, thus switching the gas flow from the main channel to the backup channel.

[0030] Furthermore, in order to enable the cooling mechanism 5 to cool the volatile organic compounds filtered from the two filter mechanisms 4, as a preferred embodiment of the present invention, the cooling mechanism 5 includes a third tube 51, a fourth housing 52, a fifth housing 53, a fourth tube 54, a fifth tube 55, and a tube side 56. One end of the fourth housing 52 is fastened to the ends of the two third housings 41 away from the second tube 32 via two third flanges. The other end of the fourth housing 52 is fixedly connected to one end of the fifth housing 53. The surface of the fifth housing 53 is fixedly connected to one end of the third tube 51, the fourth tube 54, and the fifth tube 55. Both ends of the tube side 56 are fixedly connected to the inner wall of the fifth housing 53. The third housing 41, the fourth housing 52, the tube side 56, and the fifth tube 55 are internally connected, and a one-way valve is provided at the connection between the third housing 41 and the fourth housing 52. The third tube 51, the fifth housing 53, and the fourth tube 54 are internally connected, and a flow regulating valve is provided inside the third tube 51. Specifically, such as Figures 1-4 as well as Figure 6As shown, during use, as the gas filtered inside the third housing 41 passes through the one-way valve at the connection between the third housing 41 and the fourth housing 52 and enters the fourth housing 52, this gas can then enter the tubes of the tube side 56. After condensing inside the tubes of the tube side 56, it is then passed out from the other end of the tube side 56 and finally passed out from the fifth tube 55 to the next process. [If it meets the qualified standards, it can be directly discharged. If it does not meet the standards, it can be treated in the current conventional way (such as a sewage treatment tank). Of course, if there is still some gas that has not been condensed or is not completely filtered, this device can be connected in series and the gas can be reintroduced into the second device to repeat the above steps for secondary treatment. The specific method is not limited.] In addition, during the condensation of the filtered gas inside tube 56, coolant also flows inside the third tube 51, the fifth shell 53 and the fourth tube 54 at the same time. The coolant immerses all the pipes in tube 56 inside, thereby condensing the gas flowing inside tube 56 through heat exchange.

[0031] Furthermore, it should be noted that the instantaneous gas volume introduced into the first pipe 1 may vary in the early stages (e.g., the exhaust gas from a chemical plant reactor is often intermittent, such as a large volume of gas when the valve is first opened, followed by a decrease). When the large amount of mixed gas that initially enters the cooling mechanism 5 after filtration, the condensation efficiency may be affected if the coolant flow rate is not increased. Therefore, a power recovery mechanism 2 can be set up to change the flow rate of the cooling mechanism 5 according to the flow rate of volatile organic compounds flowing inside the first pipe 1. Specifically, as a preferred embodiment of the present invention, the power recovery mechanism 2 includes a first housing 21, a gear accelerator 22, a first plate 23, a first rod 24, and at least one third spring 25. One end of the first housing 21 is fixedly connected to the middle of the first tube 1, and the first housing 21 communicates with the interior of the first tube 1. The first plate 23 and the first rod 24 are both located inside the first housing 21. One end of the first plate 23 is located inside the first tube 1, and the other end of the first plate 23 is fixedly connected to the middle of the first rod 24. One end of the first rod 24 extends through to the outside of the first housing 21 and is fixedly connected to the input end of the gear accelerator 22. The output end of the gear accelerator 22 is connected to the valve stem of the flow regulating valve through a chain sprocket. The first rod 24 is rotatably connected to the through-hole of the first housing 21 through a second sealed bearing. The same end of each third spring 25 is fixedly connected to the end of the first plate 23 away from the first rod 24, and the other end of each third spring 25 is fixedly connected to the first housing 21. More in detail, such as Figures 1-5As shown, during use, if the flow rate of the mixed gas rushing into the first tube 1 is large, the impact force of this airflow is also large. Therefore, the airflow will directly collide with the first plate 23. After the first plate 23 is subjected to force, it rotates through the first rod 24. The rotation of the first rod 24 can drive the gear inside the gear accelerator 22 located outside the first housing 21 to rotate. Then, the gear accelerator 22 can drive the valve stem of the flow regulating valve inside the third tube 51 to rotate through the chain sprocket, thereby changing the flow rate of the coolant inside the third tube 51. When the flow rate of the mixed gas decreases in the middle and later stages, the first plate 23 returns to the basic position under the thrust of the third spring 25, thereby reducing the flow rate of the coolant inside the third tube 51. It should be noted that the chain and sprocket drive structure is a mature existing technology and is therefore not shown in the figure. Of course, a synchronous belt and synchronous pulley drive structure can also be used, and there is no specific limitation. In addition, if the coolant flow rate inside the third tube 51 does not need to be adjusted, the acceleration capability of the gear accelerator 22 can be applied to other equipment to achieve kinetic energy recovery, and there is no specific limitation.

[0032] Finally, it should be noted that the above-mentioned components, such as the flange connection between the first pipe body 1 and the external air intake device and the second housing 31, and the flange connection between the third housing 41 and the second housing 31 and the fourth housing 52, can be disassembled through the flanges after a period of production (such as during regular maintenance), so that the internal parts of the corresponding components can be cleaned and replaced.

[0033] Working principle: When the device starts operating, the chemical waste gas (mixed gas) first enters from the first pipe 1. The exhaust gas from chemical plants often fluctuates in volume. If the gas flow is very large at any moment, the strong airflow will directly impact the first plate 23. After being subjected to force, the first plate 23 will drive the first rod 24 to rotate, which in turn drives the chain through the external gear accelerator 22 to automatically open the coolant valve. When the airflow weakens, the first plate 23 will automatically reset under the thrust of the third spring 25, and the cooling valve will also close. This achieves a purely mechanical automatic compensation of "the stronger the gas comes, the larger the cooling valve opens".

[0034] After the gas smoothly passes through the main channel of the diversion mechanism 3, it enters the third housing 41 of the filter mechanism 4 through the second tube 32 and passes through the second annular mesh wheel 44. It then comes into contact with the filter medium (such as activated carbon) sandwiched between the first annular mesh wheel 42 and the second annular mesh wheel 44. The activated carbon firmly adsorbs the dangerous organic molecules, while the clean air passes through. Subsequently, the filtered gas enters the cooling mechanism 5 and is cooled by the coolant in the fifth housing 53 in the pipe of the tube side 56. Finally, it is safely discharged through the fifth tube 55.

[0035] As adsorption proceeds, excessive adsorption by activated carbon can generate a large amount of heat, creating a potential explosion hazard. At this point, multiple second heat-conducting wires 632 inserted into the filter medium will rapidly concentrate the dangerous high temperature inside to the first heat-conducting wire 631. The first heat-conducting wire 631 not only dissipates heat from the incoming cold airflow, but when the heat becomes too high and cannot be dissipated, its tip will transfer the heat into the heat-insulating bellows cover 624, heating the second spring 628 inside. This second spring 628 is a shape memory alloy spring. As the temperature soars to a dangerous critical point, it will undergo physical expansion due to heat, forcibly stretching upwards and pushing the first magnet 622 upwards.

[0036] When the first magnet 622 rises to align with the second magnet 626 next to it, the two are attracted together by magnetic force, which pulls out the fifth rod 627. As soon as the fifth rod 627 is pulled away, the second block 616, which was originally stuck by it, is instantly released. Then, the first spring 613, which has been compressed, suddenly springs up and slams the first block 611 upwards. This force hits the heavier end of the herringbone plate 332, forcibly flipping it over like a seesaw, thus completely shutting off the main channel in an instant and forcibly diverting the dangerous gas to another safe backup filter channel.

[0037] In summary, compared to traditional devices that heavily rely on electronic sensors and solenoid valves, this device requires no electrical intervention throughout the entire process. Power comes entirely from the physical feedback of the environment itself: for example, flow regulation relies on the pressure impact of the flowing exhaust gas; heavy-load channel switching relies on gravity (the counterweight of the 332 herringbone plate); and the most crucial over-temperature life-saving cutoff relies on the thermal conductivity of metal, the attractive force of magnets, and the natural physical law of shape memory alloy deformation under heat. This design eliminates the risk of "blinding" caused by sudden power outages, cable burnouts, or sensor malfunctions in chemical plants. Under extremely dangerous high-temperature and high-pressure conditions, its purely physical mechanical action becomes increasingly rapid and reliable, achieving true "failure-oriented safety."

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. A device for recovering and purifying volatile organic compounds in chemical safety production processes, characterized in that, include: Two filtration mechanisms (4) are capable of filtering volatile organic compounds generated during chemical safety production processes; The first tube (1) is capable of guiding volatile organic compounds from the chemical safety production process to the filtration mechanism (4). The diversion mechanism (3) can close the first filter mechanism (4) after the filter medium inside the first filter mechanism (4) reaches the set temperature, and guide the volatile organic gas generated in the chemical safety production process to the second filter mechanism (4). The emergency circuit breaker (6) can drive the diversion mechanism (3) to close the first filter (4) after the filter medium inside the first filter (4) reaches the set temperature.

2. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 1, characterized in that, Also includes: Cooling mechanism (5) is capable of cooling volatile organic gases filtered from inside the two filtration mechanisms (4); The power recovery mechanism (2) can change the flow rate of the cooling mechanism (5) according to the flow rate of volatile organic gas flowing inside the first tube (1).

3. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 2, characterized in that, The filtration mechanism (4) includes a third housing (41), a first annular mesh wheel (42), a second plate (43), a second annular mesh wheel (44), a sixth plate (45), and several seventh plates (46). The third housing (41) is cylindrical. One end of the third housing (41) is connected to the diversion mechanism (3), and the other end of the third housing (41) is connected to the cooling mechanism (5). One side of the second plate (43) is fixedly connected to the inner wall of the third housing (41) near the diversion mechanism (3), and the other side of the second plate (43) is fixedly connected to one end of the first annular mesh wheel (42), the second annular mesh wheel (44), and several seventh plates (46). The first annular mesh wheel (42), the second annular mesh wheel (44), the second annular mesh wheel (45), the second annular mesh wheel (46), the second annular mesh wheel (42), the second annular mesh wheel (43), the second annular mesh wheel (44), the third annular mesh wheel (45), and several seventh plates (46) are all fixedly connected. The other ends of the wheel (44) and several seventh plates (46) are fixedly connected to one side of the sixth plate (45). The first annular mesh wheel (42) and the second annular mesh wheel (44) are arranged in concentric circles, and the second annular mesh wheel (44) is located inside the first annular mesh wheel (42). The two ends of several seventh plates (46) are fixedly connected to the adjacent side of the first annular mesh wheel (42) and the second annular mesh wheel (44), and several seventh plates (46) are equidistantly distributed between the first annular mesh wheel (42) and the second annular mesh wheel (44). The diversion mechanism (3), the third housing (41) and the cooling mechanism (5) are internally connected, and the filter medium is located between the first annular mesh wheel (42) and the second annular mesh wheel (44).

4. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 3, characterized in that, The diversion mechanism (3) includes a second housing (31), a main / backup channel switching assembly (33), a herringbone frame (34), a fifth plate (35), and two second pipe bodies (32). One end of the second housing (31) is fastened to the first pipe body (1) via a first flange, and the other end of the second housing (31) is fixedly connected to the same end of both second pipe bodies (32). The other ends of the two second pipe bodies (32) are respectively fastened to two third housings (41) via two second flanges. The fifth plate (35) is fixedly connected to the inner wall of the second housing (31) and separates the second housing (31) into two first cavities. The outer wall of the herringbone frame (34) is fixedly connected to the inner wall of the second housing (31), and the two ends of the herringbone frame (34) are respectively located in the two first cavities. The herringbone frame (34) is located above the main and backup channel switching assembly (33) and the fifth plate (35). The first tube (1), the second housing (31), the second tube (32) and the third housing (41) are internally connected.

5. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 4, characterized in that, The main / backup channel switching assembly (33) includes a second rod (331) and a herringbone plate (332). Both ends of the second rod (331) are rotatably connected to the second housing (31) through a first sealed bearing. The middle part of the second rod (331) is fixedly connected to the middle part of the herringbone plate (332). The two ends of the herringbone plate (332) are respectively located in two first cavities, and the side wall of the herringbone plate (332) abuts against the side wall of the herringbone frame (34).

6. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 5, characterized in that, The emergency circuit breaker mechanism (6) includes a pushing component (61), a releasing component (62), and a heat transfer component (63). The pushing component (61) is located in one of the first cavities, and one end of the pushing component (61) is connected to the fifth plate (35). The other end of the pushing component (61) is connected to one end of the releasing component (62). The other end of the releasing component (62) is connected to one end of the heat transfer component (63). The other end of the heat transfer component (63) passes through the second tube (32) to the interior of the third housing (41) and is located between the first annular mesh wheel (42) and the second annular mesh wheel (44). The second housing (31) has a through opening (311) that communicates with the first cavity on the side near the push assembly (61). An observation window is provided inside the through opening (311) through a fourth flange. The herringbone plate (332) is heavier at one end near the push assembly (61) than at the other end.

7. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 6, characterized in that, The pushing assembly (61) includes a first block (611), a third plate (614), a fourth plate (615), a second block (616), a plurality of third rods (612), and a plurality of first springs (613). One side of the third plate (614) is fixedly connected to the side wall of the fifth plate (35). One end of the second block (616) is connected to the loosening assembly (62), and the other end of the second block (616) is fixedly connected to one end of the fourth plate (615). The surface of the fourth plate (615) is fixedly connected to the same end of the plurality of third rods (612). The other end of each of the first blocks (611) passes through the third plate (614) and is fixedly connected to one side of the first block (611). The other side of the first block (611) abuts against the side of the herringbone plate (332) away from the herringbone frame (34). The cross section of the first block (611) on the first surface is a right trapezoid, wherein the oblique angle of the right trapezoid faces the herringbone plate (332) and the oblique angle of the right trapezoid matches the herringbone plate (332). The first surface is perpendicular to the plane of the fifth plate (35). The two ends of several first springs (613) are fixedly connected to the side adjacent to the first block (611) and the fourth plate (615), respectively. The first spring (613) is a strong spring, and the sum of the weight of the herringbone plate (332) and the impact force of the mixed gas is less than the thrust of the first spring (613).

8. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 7, characterized in that, The detachment assembly (62) includes a third block (621), a first magnet (622), a fourth rod (623), an insulated bellows cover (624), a fourth block (625), a second magnet (626), a fifth rod (627), a second spring (628), and a fifth block (629). One side of the fourth block (625) and one side of the fifth block (629) are fixedly connected to the side wall of the fifth plate (35). The side of the fourth block (625) near the herringbone plate (332) is fixedly connected to the same end of the second spring (628) and the insulated bellows cover (624). The other ends of the second spring (628) and the insulated bellows cover (624) are fixedly connected to one end of the third block (621). The other end of the third block (621) is fixedly connected to the other end of the third block (621). Both the first magnet (622) and the sidewall of the first magnet (622) are provided with openings. The fifth block (629) is sleeved and slidably connected to the outer wall of one end of the fourth rod (623). The other end of the fourth rod (623) passes through the opening of the third block (621) and the first magnet (622) and is fixedly connected to one end of the second magnet (626). The other end of the second magnet (626) is fixedly connected to one end of the fifth rod (627). The other end of the fifth rod (627) passes through the second block (616) and is slidably connected to the second block (616). The side of the first magnet (622) away from the second magnet (626) is fixedly connected to the end of the third block (621) away from the second spring (628). The first magnet (622) and the second magnet (626) attract each other. The second spring (628) is a shape memory alloy spring, and the normal state of the second spring (628) is a compressed state; The heat transfer assembly (63) includes a first heat-conducting wire (631) and a plurality of second heat-conducting wires (632). One end of the first heat-conducting wire (631) is located inside the heat-insulating bellows cover (624) and abuts against the second spring (628). A plurality of grooves (451) are provided inside the sixth plate (45). The other end of the first heat-conducting wire (631) passes through the second tube (32) into the groove (451) and is fixedly connected to one end of each of the plurality of second heat-conducting wires (632). The other ends of the plurality of second heat-conducting wires (632) pass through the plurality of grooves (451) to the space between the first annular mesh wheel (42) and the second annular mesh wheel (44).

9. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 8, characterized in that, The cooling mechanism (5) includes a third tube (51), a fourth housing (52), a fifth housing (53), a fourth tube (54), a fifth tube (55), and a tube side (56). One end of the fourth housing (52) is fastened to the ends of the two third housings (41) away from the second tube (32) via two third flanges. The other end of the fourth housing (52) is fixedly connected to one end of the fifth housing (53). The surface of the fifth housing (53) is flush with the third tube (51), the fourth tube (54), and the tube side (55). 4) One end of the fifth tube (55) is fixedly connected, and both ends of the tube (56) are fixedly connected to the inner wall of the fifth housing (53). The third housing (41), the fourth housing (52), the tube (56) and the fifth tube (55) are internally connected. A one-way valve is provided at the connection between the third housing (41) and the fourth housing (52). The third tube (51), the fifth housing (53) and the fourth tube (54) are internally connected. A flow regulating valve is provided inside the third tube (51).

10. The volatile organic compound recovery and purification device for chemical safety production processes according to claim 9, characterized in that, The power recovery mechanism (2) includes a first housing (21), a gear accelerator (22), a first plate (23), a first rod (24), and at least one third spring (25). One end of the first housing (21) is fixedly connected to the middle of the first tube (1), and the first housing (21) communicates with the interior of the first tube (1). The first plate (23) and the first rod (24) are both located inside the first housing (21). One end of the first plate (23) is located inside the first tube (1), and the other end of the first plate (23) is connected to the first rod (24). The first rod (24) is fixedly connected to the middle part of the first housing (21), and one end of the first rod (24) extends through to the outside of the first housing (21) and is fixedly connected to the input end of the gear accelerator (22). The output end of the gear accelerator (22) is connected to the valve stem of the flow regulating valve through a chain sprocket. The first rod (24) is rotatably connected to the through-hole of the first housing (21) through a second sealed bearing. The same end of the third spring (25) is fixedly connected to the end of the first plate (23) away from the first rod (24), and the other end of the third spring (25) is fixedly connected to the first housing (21).

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