A multi-stage adsorption treatment device for volatile organic compounds

Abstract

This utility model relates to the field of volatile organic compound (VOC) adsorption and treatment technology, and discloses a multi-stage adsorption and treatment device for VOCs. The device includes an adsorption cylinder with a sealing cap fixedly installed at the upper end, support pillars fixedly installed at the four corners of the lower end, and a controller fixedly installed at the center of the front end. The device is characterized by an adsorption wheel rotatably installed inside the adsorption cylinder, the shape of which is adapted to the shape of the adsorption cylinder. An exhaust pipe is fixedly installed on the left side of the lower end of the adsorption cylinder. It also includes a drive mechanism. This utility model achieves synchronous dynamic operation of adsorption and desorption. The device drives the adsorption wheel to rotate continuously via the drive mechanism, simultaneously performing thermal desorption treatment on the adsorption saturation area in conjunction with the desorption mechanism. The rotation of the adsorption wheel enables dynamic switching between the adsorption and desorption areas, eliminating the need for downtime to replace adsorption components, avoiding production interruptions, ensuring continuous production rhythm for enterprises, significantly reducing capacity losses caused by downtime, and improving economic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of volatile organic compound (VOC) adsorption and treatment technology, and in particular to a multi-stage adsorption and treatment device for VOCs. Background Technology

[0002] The volatile organic compound (VOC) multi-stage adsorption treatment device is an environmental protection equipment that achieves efficient separation and recovery of organic matter in waste gas through a multi-stage adsorption and desorption process. Its core principle is to utilize the differences in characteristics of different adsorbents or the gradient adsorption capacity of the same adsorbent, combined with pretreatment, adsorption, desorption and other links, to achieve deep purification of complex VOC waste gas.

[0003] First, the pretreatment unit removes particulate matter and condensate from the waste gas and cools it down, reducing the impact on the adsorbent. Then, the waste gas sequentially enters a multi-stage adsorption layer. The primary adsorption layer uses materials such as activated carbon to capture high-concentration VOCs, while the deep adsorption layer uses materials such as zeolite molecular sieves to finely adsorb low-concentration, small-molecule pollutants, achieving gradient purification. When the adsorbent is saturated, desorption is carried out through methods such as hot nitrogen purging and vacuum desorption, allowing VOCs to be desorbed and recovered through processes such as condensation. The adsorbent is regenerated and recycled. At the same time, the device ensures continuous operation through the alternating adsorption and desorption of multiple adsorption units and the linkage of an intelligent control system, ultimately reducing the VOCs concentration in the waste gas to below the emission standard, achieving both purification and resource recovery.

[0004] Existing methods for treating volatile organic compounds (VOCs) waste gas involve activated carbon adsorption. However, activated carbon needs to be replaced after it becomes saturated, leading to production interruptions and impacting economic efficiency and environmental compliance. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a multi-stage adsorption treatment device for volatile organic compounds, so as to solve the problem that the activated carbon in the above-mentioned device needs to be shut down for replacement when it is saturated.

[0006] This utility model provides a multi-stage adsorption treatment device for volatile organic compounds, comprising an adsorption cylinder, a sealing cap fixedly installed at the upper end of the adsorption cylinder, support pillars fixedly installed at the four corners of the lower end of the adsorption cylinder, and a controller fixedly installed at the center of the front end of the adsorption cylinder. The device is characterized in that an adsorption wheel is rotatably installed inside the adsorption cylinder, the shape of the adsorption wheel being adapted to the shape of the adsorption cylinder. It also includes:

[0007] A drive mechanism is mounted on the sealing cover and is used to drive the adsorption wheel to rotate.

[0008] A sealing and squeezing mechanism is installed inside a sealing cover. The sealing and squeezing mechanism is used to squeeze the adsorption wheel to fit against the inner wall of the adsorption cylinder. An air inlet pipe and an exhaust pipe are installed on the sealing and squeezing mechanism, and the other end of the exhaust pipe is connected to an incinerator.

[0009] A desorption mechanism is installed on the right side of the lower end of the adsorption cylinder. The desorption mechanism is used to assist the adsorption wheel in desorption treatment.

[0010] Preferably, the drive mechanism includes a servo motor and a rotating shaft. The servo motor is fixedly connected to the upper middle part of the sealing cover, and the rotating shaft is rotatably connected to the inner middle part of the sealing cover. The rotating shaft is fixedly connected to the output end of the servo motor. A drive disk is fixedly installed at the lower end of the rotating shaft, and multiple limit strips arranged in a circular array are fixedly installed at the upper end of the drive disk.

[0011] Preferably, the adsorption wheel adopts a honeycomb design, with a through hole in the center of the adsorption wheel, and multiple strip grooves arranged in a ring array at the lower end of the adsorption wheel. The adsorption wheel is sleeved on the outside of the rotating shaft, and the rotating shaft is inserted into the through hole. The limiting strip is engaged in the strip groove, and the shape of the limiting strip and the strip groove are compatible.

[0012] Preferably, the sealing and extrusion mechanism includes a hydraulic cylinder and an extrusion plate. There are two hydraulic cylinders, which are fixedly connected and installed at the front and rear of the upper end of the sealing cover. The output shaft of the hydraulic cylinder passes through the interior of the sealing cover. The extrusion plate is fixedly connected and installed at the output end of the hydraulic cylinder. The extrusion plate is located on the top of the adsorption wheel and fits against the top of the adsorption wheel. The extrusion plate is slidably connected to the rotating shaft, which passes through the interior of the extrusion plate. The diameter of the extrusion plate is adapted to the inner diameter of the adsorption cylinder.

[0013] Preferably, the air intake pipe is fixedly connected to the left side of the upper end of the extrusion plate, and the exhaust pipe is fixedly connected to the right side of the upper end of the extrusion plate. Both the air intake pipe and the exhaust pipe pass through the inside of the sealing cover and are slidably connected to the sealing cover.

[0014] Preferably, the desorption mechanism includes a hot air blower and an air supply duct. The hot air blower is located on the right side below the adsorption cylinder. The air supply duct is installed at the rear end of the hot air blower by a fixed connection. The air supply duct has a curved shape. The top of the air supply duct is fixedly connected to the adsorption cylinder. An air inlet is provided on the right side of the lower end of the adsorption cylinder. An air outlet is provided at the rear of the upper end of the air supply duct. The air outlet and the air inlet are internally connected.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model achieves synchronous dynamic operation of adsorption and desorption. The device drives the adsorption wheel to rotate continuously through the drive mechanism, and works in conjunction with the desorption mechanism to perform thermal desorption treatment on the adsorption saturation area. The rotation of the adsorption wheel realizes the dynamic switching between the adsorption area and the desorption area. There is no need to stop the machine to replace the adsorption components, avoiding production interruption, ensuring the continuous production rhythm of enterprises, significantly reducing the production capacity loss caused by downtime, and improving economic benefits.

[0017] 2. This utility model achieves a closed-loop process for the entire process of adsorption, purification, desorption, and treatment by discharging the purified gas through an exhaust pipe and then connecting the pollutant-containing gas stream generated by desorption to an incinerator through a sewage pipe for thorough treatment. At the same time, the continuous operation mode eliminates the situation where the waste gas cannot be treated when the machine is shut down, ensuring compliance throughout the waste gas treatment process and effectively avoiding environmental risks. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the adsorption cylinder of this utility model;

[0020] Figure 3 This is a schematic diagram of the disassembled structure of the drive mechanism and adsorption wheel of this utility model;

[0021] Figure 4 This is a schematic diagram of the desorption mechanism of this utility model.

[0022] Numbering on the map:

[0023] 1. Adsorption cylinder; 11. Support column; 12. Sealing cover; 2. Drive mechanism; 21. Servo motor; 22. Rotating shaft; 23. Drive disk; 231. Limiting strip; 3. Adsorption wheel; 31. Through hole; 32. Strip groove; 4. Sealing and extrusion mechanism; 41. Hydraulic cylinder; 42. Extrusion plate; 5. Air inlet pipe; 6. Sewage pipe; 7. Controller; 8. Desorption mechanism; 81. Hot air blower; 82. Air supply duct; 821. Air outlet; 9. Exhaust pipe. Detailed Implementation

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

[0025] like Figure 1-4 As shown, this utility model has the following two specific embodiments.

[0026] Example 1

[0027] A multi-stage adsorption treatment device for volatile organic compounds includes an adsorption cylinder 1, a sealing cap 12 fixedly installed at the upper end of the adsorption cylinder 1, support columns 11 fixedly installed at the four corners of the lower end of the adsorption cylinder 1, and a controller 7 fixedly installed at the middle of the front end of the adsorption cylinder 1. The device is characterized in that an adsorption wheel 3 is rotatably installed inside the adsorption cylinder 1, the shape of the adsorption wheel 3 being adapted to the shape of the adsorption cylinder 1, and an exhaust pipe 9 fixedly installed on the lower left side of the adsorption cylinder 1. The device also includes:

[0028] Drive mechanism 2 is mounted on sealing cover 12 and is used to drive adsorption wheel 3 to rotate.

[0029] The sealing and squeezing mechanism 4 is installed inside the sealing cover 12. The sealing and squeezing mechanism 4 is used to squeeze the adsorption wheel 3 to fit against the inner wall of the adsorption cylinder 1. An air inlet pipe 5 and a sewage pipe 6 are installed on the sealing and squeezing mechanism 4. The other end of the sewage pipe 6 is connected to an incinerator.

[0030] Desorption mechanism 8 is installed on the lower right side of adsorption cylinder 1. Desorption mechanism 8 is used to assist adsorption wheel 3 in desorption treatment.

[0031] In this embodiment, as Figures 1-4 As shown, after the device is started, the controller 7 at the front center of the adsorption cylinder 1 issues a command, and the drive mechanism 2 installed on the sealing cover 12 starts to run, driving the adsorption wheel 3 installed inside the adsorption cylinder 1 to rotate. At the same time, the sealing and squeezing mechanism 4 inside the sealing cover 12 starts, applying pressure to the adsorption wheel 3, so that the adsorption wheel 3 tightly fits against the inner wall of the adsorption cylinder 1 to ensure the sealing effect. After sealing is completed, VOCs waste gas enters the adsorption cylinder 1 through the air inlet pipe 5 on the sealing and squeezing mechanism 4. The rotating adsorption wheel 3 adsorbs and purifies the volatile organic compounds in the waste gas. The purified gas is discharged through the exhaust pipe 9, and then the adsorption wheel 3 continues to rotate. During the continuous adsorption process of the adsorption wheel 3, the desorption mechanism 8 on the lower right side of the adsorption cylinder 1 starts synchronously to perform auxiliary desorption treatment on the adsorption wheel 3, realizing continuous adsorption and desorption. The desorbed gas is discharged from the drain pipe 6 and connected to the incinerator. There is no need to stop the machine to replace the adsorption wheel 3, ensuring continuous production.

[0032] Example 2

[0033] The difference from Embodiment 1 is that this embodiment discloses a drive mechanism 2, a sealing and pressing mechanism 4, and a desorption mechanism 8:

[0034] The drive mechanism 2 includes a servo motor 21 and a rotating shaft 22. The servo motor 21 is fixedly connected to the middle of the upper end of the sealing cover 12. The rotating shaft 22 is rotatably connected to the middle of the inner part of the sealing cover 12. The rotating shaft 22 is fixedly connected to the output end of the servo motor 21. A drive disk 23 is fixedly installed at the lower end of the rotating shaft 22. Multiple limit bars 231 arranged in a ring array are fixedly installed at the upper end of the drive disk 23.

[0035] The adsorption wheel 3 adopts a honeycomb design. A through hole 31 is provided in the middle of the adsorption wheel 3. Multiple strip grooves 32 arranged in a ring array are provided at the lower end of the adsorption wheel 3. The adsorption wheel 3 is sleeved on the outside of the rotating shaft 22, and the rotating shaft 22 is inserted into the through hole 31. The limiting strip 231 is locked in the strip groove 32. The shapes of the limiting strip 231 and the strip groove 32 are compatible.

[0036] The sealing and extrusion mechanism 4 includes a hydraulic cylinder 41 and an extrusion plate 42. There are two hydraulic cylinders 41, and the hydraulic cylinders 41 are fixedly connected and installed at the front and rear of the upper end of the sealing cover 12. The output shaft of the hydraulic cylinder 41 passes through the interior of the sealing cover 12. The extrusion plate 42 is fixedly connected and installed at the output end of the hydraulic cylinder 41. The extrusion plate 42 is located on the top of the adsorption wheel 3 and is in contact with the top of the adsorption wheel 3. The extrusion plate 42 is slidably connected to the rotating shaft 22, and the rotating shaft 22 passes through the interior of the extrusion plate 42. The diameter of the extrusion plate 42 is adapted to the inner diameter of the adsorption cylinder 1.

[0037] The air inlet pipe 5 is fixedly connected to the left side of the upper end of the extrusion plate 42, and the sewage pipe 6 is fixedly connected to the right side of the upper end of the extrusion plate 42. Both the air inlet pipe 5 and the sewage pipe 6 pass through the interior of the sealing cover 12 and are slidably connected to the sealing cover 12.

[0038] The desorption mechanism 8 includes a hot air blower 81 and an air supply duct 82. The hot air blower 81 is located on the right side below the adsorption cylinder 1. The air supply duct 82 is installed at the rear end of the hot air blower 81 by a fixed connection. The air supply duct 82 is curved. The top of the air supply duct 82 is fixedly connected to the adsorption cylinder 1. An air inlet is provided on the right side of the lower end of the adsorption cylinder 1. An air outlet 821 is provided at the rear of the upper end of the air supply duct 82. The air outlet 821 is connected to the interior of the air inlet.

[0039] In this embodiment, as Figures 1-4As shown, during device operation, the controller 7 at the front center of the adsorption cylinder 1 controls the drive mechanism 2 to start, and the servo motor 21 fixed at the upper center of the sealing cover 12 operates, driving the rotating shaft 22 connected to the center of the sealing cover 12 to rotate. Since the limiting strip 231 on the drive disk 23 fixed at the lower end of the rotating shaft 22 is engaged in the strip groove 32 at the lower end of the adsorption wheel 3, and the adsorption wheel 3 is sleeved on the outside of the rotating shaft 22, the rotating shaft 22 drives the honeycomb adsorption wheel 3 to rotate inside the adsorption cylinder 1 through the cooperation of the drive disk 23, the limiting strip 231 and the strip groove 32. At the same time, the two hydraulic cylinders 41 fixed at the front and rear of the upper end of the sealing cover 12 in the sealing extrusion mechanism 4 are activated, and their output shafts pass through the sealing cover 12 to push the extrusion plate 42 to slide downward along the rotating shaft 22 until the extrusion plate 42 is tightly attached to the top of the adsorption wheel 3, forming a sealed space. Subsequently, VOCs waste gas enters the sealed area through the air inlet pipe 5 fixed on the left side of the upper end of the extrusion plate 42, and the rotating honeycomb adsorption wheel 3 efficiently adsorbs organic matter; the purified gas is discharged through the exhaust pipe 9. As the adsorption wheel 3 continues to rotate, the desorption mechanism 8 works simultaneously: the hot air blower 81 on the right side below the adsorption cylinder 1 generates hot air, which is transported through the curved air supply pipe 82 fixed at the rear end. The hot air enters the adsorption cylinder 1 through the air inlet on the right side of the lower end of the adsorption cylinder 1 from the air outlet 821 at the upper rear end of the air supply pipe 82, and performs thermal desorption treatment on the adsorption wheel 3. The desorbed material is discharged from the sewage pipe 6 with the airflow and connected to the incinerator, realizing continuous operation.

[0040] The working principle of this utility model is as follows: After the device is started, the controller 7 first triggers the drive mechanism 2 on the sealing cover 12 to run. The servo motor 21 in the middle of the upper end of the sealing cover 12 runs, driving the rotating shaft 22 connected in the middle of the sealing cover 12 to rotate. Because the limiting strip 231 on the drive disk 23 fixed at the lower end of the rotating shaft 22 fits into the strip groove 32 at the lower end of the adsorption wheel 3, and the adsorption wheel 3 is sleeved on the outside of the rotating shaft 22 through the middle through hole 31, the rotating shaft 22 drives the honeycomb adsorption wheel 3 to rotate synchronously in the adsorption cylinder 1 through the transmission cooperation of the drive disk 23, the limiting strip 231 and the strip groove 32. At the same time, the sealing and squeezing mechanism 4 in the sealing cover 12 starts in coordination. The two hydraulic cylinders 41 at the front and rear of the upper end of the sealing cover 12 push the output shaft through the sealing cover 12, driving the squeezing plate 42 to slide down along the rotating shaft 22 until the squeezing plate 42 is tightly attached to the top of the adsorption wheel 3 to form a closed processing space. After sealing is completed, VOCs waste gas enters the closed area through the air inlet pipe 5 on the upper left side of the extrusion plate 42. The rotating honeycomb adsorption wheel 3 efficiently adsorbs the volatile organic compounds in the waste gas. The purified gas is directly discharged through the exhaust pipe 9 on the lower left side of the adsorption cylinder 1. While the adsorption wheel 3 continues to rotate and adsorb, the desorption mechanism 8 on the lower right side of the adsorption cylinder 1 is started simultaneously. The hot air generated by the hot air blower 81 on the lower right side of the adsorption cylinder 1 is transported through the curved air supply pipe 82 at the rear end. It enters the adsorption cylinder 1 through the air inlet on the lower right side of the adsorption cylinder 1 from the air outlet 821 at the upper rear end of the air supply pipe 82. The area where the adsorption wheel 3 has adsorbed organic matter is subjected to thermal desorption treatment. The pollutant-containing gas flow generated by desorption is discharged through the sewage pipe 6 on the upper right side of the extrusion plate 42 and connected to an external incinerator for treatment. The adsorption wheel 3 achieves dynamic switching between the adsorption and desorption zones through continuous rotation. Combined with the coordinated operation of the drive, sealing, and desorption mechanisms, the adsorption of VOCs and the desorption of the adsorbent are carried out continuously without the need to stop the machine to replace the adsorption wheel 3, thus ensuring production continuity and environmental compliance.

[0041] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A multi-stage adsorption treatment device for volatile organic compounds, comprising an adsorption cylinder (1), wherein a sealing cap (12) is fixedly installed on the upper end of the adsorption cylinder (1), and support columns (11) are fixedly installed at the four corners of the lower end of the adsorption cylinder (1), and a controller (7) is fixedly installed at the middle of the front end of the adsorption cylinder (1), characterized in that, An adsorption wheel (3) is rotatably installed inside the adsorption cylinder (1). The shape of the adsorption wheel (3) is adapted to the adsorption cylinder (1). An exhaust pipe (9) is fixedly installed on the lower left side of the adsorption cylinder (1). The adsorption cylinder (1) also includes: a driving mechanism (2), which is installed on the sealing cover (12) and is used to drive the adsorption wheel (3) to rotate; a sealing and squeezing mechanism (4), which is installed inside the sealing cover (12) and is used to squeeze the adsorption wheel (3) to fit against the inner wall of the adsorption cylinder (1). An air inlet pipe (5) and a sewage pipe (6) are installed on the sealing and squeezing mechanism (4). The other end of the sewage pipe (6) is connected to an incinerator; and a desorption mechanism (8), which is installed on the lower right side of the adsorption cylinder (1) and is used to assist the adsorption wheel (3) in desorption treatment.

2. The multi-stage adsorption treatment device for volatile organic compounds according to claim 1, characterized in that, The drive mechanism (2) includes a servo motor (21) and a rotating shaft (22). The servo motor (21) is fixedly connected to the middle of the upper end of the sealing cover (12). The rotating shaft (22) is installed in the middle of the inner part of the sealing cover (12) through a rotating connection. The rotating shaft (22) is fixedly connected to the output end of the servo motor (21). A drive disk (23) is fixedly installed at the lower end of the rotating shaft (22). A plurality of limit strips (231) arranged in a ring array are fixedly installed at the upper end of the drive disk (23).

3. The multi-stage adsorption treatment device for volatile organic compounds according to claim 2, characterized in that, The adsorption wheel (3) adopts a honeycomb design. A through hole (31) is provided in the middle of the adsorption wheel (3). A plurality of strip grooves (32) are arranged in a ring array at the lower end of the adsorption wheel (3). The adsorption wheel (3) is sleeved on the outside of the rotating shaft (22), and the rotating shaft (22) is inserted into the through hole (31). The limiting strip (231) is stuck in the strip groove (32). The shape of the limiting strip (231) and the strip groove (32) are compatible.

4. The multi-stage adsorption treatment device for volatile organic compounds according to claim 1, characterized in that, The sealing and extrusion mechanism (4) includes a hydraulic cylinder (41) and an extrusion plate (42). There are two hydraulic cylinders (41), and the hydraulic cylinders (41) are installed on the front and rear of the upper end of the sealing cover (12) by a fixed connection. The output shaft of the hydraulic cylinder (41) passes through the inside of the sealing cover (12). The extrusion plate (42) is installed on the output end of the hydraulic cylinder (41) by a fixed connection. The extrusion plate (42) is located on the top of the adsorption wheel (3) and is in contact with the top of the adsorption wheel (3). The extrusion plate (42) is slidably connected to the rotating shaft (22). The rotating shaft (22) passes through the inside of the extrusion plate (42). The diameter of the extrusion plate (42) is adapted to the inner diameter of the adsorption cylinder (1).

5. The multi-stage adsorption treatment device for volatile organic compounds according to claim 1, characterized in that, The air inlet pipe (5) is fixedly connected to the left side of the upper end of the extrusion plate (42), and the sewage pipe (6) is fixedly connected to the right side of the upper end of the extrusion plate (42). Both the air inlet pipe (5) and the sewage pipe (6) penetrate the interior of the sealing cover (12) and are slidably connected to the sealing cover (12).

6. The multi-stage adsorption treatment device for volatile organic compounds according to claim 1, characterized in that, The desorption mechanism (8) includes a hot air blower (81) and an air supply pipe (82). The hot air blower (81) is located on the right side below the adsorption cylinder (1). The air supply pipe (82) is installed at the rear end of the hot air blower (81) by a fixed connection. The air supply pipe (82) adopts a curved shape. The top of the air supply pipe (82) is fixedly connected to the adsorption cylinder (1). An air inlet is provided on the right side of the lower end of the adsorption cylinder (1). An air outlet (821) is provided at the rear of the upper end of the air supply pipe (82). The air outlet (821) is connected to the air inlet.

Images