A rotary drum type VOC adsorber

Abstract

The present invention discloses a structure of a rotary drum type VOC adsorber, characterized in that a chassis assembly, a cylindrical shell assembly, an arched top cover assembly, and a top air duct assembly are connected by welding from bottom to top to form a chamber; a rotary drum support assembly is arranged at the center bottom of the chamber to support a rotary drum assembly and a desorption air flow pipeline assembly arranged at the center of the chamber; the inlet of the desorption air flow pipeline assembly is connected to the top air duct assembly, and the lower part is fixed on the rotary drum support assembly; a sealing area assembly is arranged between the rotary drum assembly and the desorption air flow pipeline assembly to seal and divide the rotary drum assembly and the desorption air flow pipeline assembly; a guiding roller assembly is suspended under the arched top cover assembly and supports the rotary drum assembly from the side to bear the radial tipping force of the rotary drum; a transmission assembly is drivingly connected to the rotary drum assembly to provide rotational power; and a transmission shaft sealing assembly seals the rotary drum assembly.

Description

Technical Field

[0001] The present invention relates to a rotary drum type VOC (volatile organic compound) adsorber, belonging to the fields of waste gas environmental protection treatment and dehumidification equipment. Background Art

[0002] Currently, in the fields of waste gas VOC treatment and air dehumidification treatment, the molecular sieve adsorption process is the mainstream technology. The molecular sieve adsorption element is made of porous materials such as zeolite, activated carbon, resin, and silica gel, and is used to adsorb VOC-containing gases or water vapor of different components. It is loaded in a rotary wheel type or rotary drum type adsorber to achieve continuous adsorption and desorption of VOC components or water vapor components in the passing waste gas. The molecular sieve element needs to be regenerated regularly to remove the impurities retained inside and restore its adsorption function. The rotary drum type adsorber was invented by Toyobo Co., Ltd. of Japan in 1986. For its working principle, see Figure 1 ... The molecular sieve material is made into a cuboid box shape and embedded on the rotary drum. The rotary drum is divided into an adsorption zone and a desorption zone, and the two are separated by a sealing zone (a total of 2 places). The sealing zone consists of one sealing arc plate inside and outside the rotary drum (including its upper and lower ends and the gap sealing strip between the top plate and bottom plate of the rotary drum) and the axial sealing strip provided inside and outside the rotary drum isolation block, which is used to separate the desorption gas flow and the treated gas flow (see attached Figure 1 attachment Figure 3 ), and reduce the leakage between the two. The rotary drum rotates slowly, and each group of molecular sieve element boxes alternately passes through the adsorption zone and the desorption zone. The VOC-containing or moisture-containing gas to be treated enters the outer periphery of the rotary drum from the air inlet of the adsorber, and radially passes through the molecular sieve element boxes in the adsorption zone of the rotary drum from the outside to the inside. Most of the VOC or water vapor components contained in the waste gas remain in the molecular sieve element. After the gas flow enters the inside of the rotary drum, it is discharged upward. The relatively high-temperature desorption gas flow is introduced into the desorption zone of the rotary drum from the inside of the rotary drum, and radially enters the desorption zone from the inside to the outside to desorb the VOC components adsorbed in the molecular sieve element, and then enters the desorption gas flow extraction pipe and is discharged to the VOC decomposition equipment for waste gas treatment. The rotary drum type design can regularly and quickly take out a single molecular sieve element box with a relatively light mass. After regeneration treatment, it can be reinstalled into the rotary drum for repeated use many times, and partial replacement is allowed, which is superior to the way of taking out the entire adsorption rotary wheel for regeneration and overall replacement in the rotary wheel type design. It is convenient for maintenance, has a short cycle, and low cost. The rotary drum type design also has the advantages of low requirement for surface grinding treatment of the molecular sieve element, no blockage of holes caused by scraping of the sealing strip on the surface of the molecular sieve element, long service life, and the upper limit of the treated air volume passing through is also higher than that of the rotary wheel type, etc., and has good application prospects.

[0003] Since the invention of the rotary drum type VOC adsorber, long-term usage experience has shown that the traditional rotary drum type adsorber has the following deficiencies: (1) It adopts a square barrel body, which is prone to deformation and cracks when the processing air pressure is relatively high. When the processing air contains toxic components, there is a potential risk of leakage to the environment. The deformation of the barrel body also drives the relative displacement between the desorption air flow channel sealing arc plate and the rotary drum, deviating from the initially set sealing position, increasing the leakage between the desorption air flow and the processing air flow; (2) The rotary axis of the rotary drum is ensured by a bottom central bearing, the top surface composed of several load-bearing rollers, and multiple roller-type bearings arranged on the outer periphery of the upper cover of the rotary drum. The structure is complex. The roller-type bearings are fixed at relatively weak parts, prone to damage and failure, and the maintenance space is narrow, making the operation inconvenient; (3) The driving speed reducer is installed below the bottom sealing plate of the rotary drum inside the machine body, making maintenance difficult. Considering the explosion-proof of the motor, the motor must be placed separately outside the machine body, and a flexible transmission shaft must be set between the speed reducer and the motor, with a complex structure; (4) The dynamic and static seals between the rotary drum and the processing air outlet air duct adopt a contact sliding seal method with a sealing rubber strip and the upper barrel cover plate. The sealing rubber strip is prone to damage. After failure, it greatly increases the leakage of the unprocessed air flow to the processed air flow, reducing the desorption efficiency. The sealing rubber strip causes a relatively large rotational resistance of the rotary drum, and the replacement space of the sealing rubber strip is narrow, making the replacement operation difficult. (5) To replace the molecular sieve element box and the sealing rubber strip, personnel need to enter the inside of the equipment body. The operation space is small, and the toxic waste gas needs to be thoroughly replaced before operation, etc. Summary of the Invention

[0004] The present invention mainly aims at the deficiencies of the traditional structure rotary drum type VOC adsorber described above, conducts an upgrade and improvement, and solves the existing problems.

[0005] The technical solution of the present invention provides a structure of a rotary drum type VOC adsorber, which is characterized in that it includes a chassis assembly, a cylindrical shell assembly, an arched top cover assembly, a top air duct assembly, a rotary drum assembly, a desorption air flow pipeline assembly, a sealing area assembly, a rotary drum support assembly, a guide roller assembly, a transmission assembly, and a transmission shaft sealing assembly; The chassis assembly, cylindrical shell assembly, arched top cover assembly, and top air duct assembly from bottom to top are connected by welding to form a chamber; The rotary drum support assembly is arranged at the center bottom of the chamber to support the rotary drum assembly and the desorption air flow pipeline assembly arranged at the center of the chamber; The inlet of the desorption air flow pipeline assembly is connected to the top air duct assembly, and the lower part is fixed on the rotary drum support assembly; The sealing area assembly is arranged between the rotary drum assembly and the desorption air flow pipeline assembly to seal and divide the rotary drum assembly and the desorption air flow pipeline assembly; The guide roller assembly is suspended below the arched top cover assembly and supports the rotary drum assembly from the side to bear the radial tipping force of the rotary drum; The transmission assembly is drivingly connected to the rotary drum assembly to provide rotational power; The transmission shaft sealing assembly seals the rotary drum assembly.

[0006] The described chassis assembly includes a girt, a bottom shell plate, a central bottom beam, and a reducer mounting bracket; the girt, the central bottom beam, and the reducer mounting bracket are connected by welding to form a load-bearing frame, which is fixed on the bottom shell plate; the girt and the bottom shell plate are connected by sealed welding;

[0007] The described cylindrical shell assembly includes a cylinder body shell plate, vertical ribs, an upper connecting flange ring, an air flow to be treated connection pipe, a molecular sieve element disassembly door, a manhole door at the bottom of the rotating drum, a vertical plate for isolating the reducer assembly space, a top plate for isolating the reducer assembly space, and a transmission gear disassembly door; the cylinder body shell plate overlaps with the girt and is connected by sealed welding; the vertical ribs are the reinforcing ribs of the cylindrical shell assembly; the upper connecting flange ring is located at the uppermost part and is connected to the arched top cover assembly by a flange; the air flow to be treated connection pipe, the molecular sieve element disassembly door, and the manhole door at the bottom of the rotating drum are arranged on the cylinder body shell plate; the positions of the vertical plate for isolating the reducer assembly space, the top plate for isolating the reducer assembly space, and the transmission gear disassembly door correspond to the reducer mounting bracket;

[0008] The described arched top cover assembly includes: a cylindrical shell connecting flange, a top cover shell plate, a central hole girt, and a top cover reinforcing beam; the top cover shell plate can adopt a combination of a plane and a cylindrical surface, a combination of a frustum slope and a cylindrical surface, or an upwardly arched curved surface shape according to the waste gas pressure; the connecting flange is located at the lowermost part and is connected to the upper connecting flange ring; the central hole girt at the uppermost part is connected to the cylindrical shell connecting flange at the lowermost part through the top cover reinforcing beam to form the frame of the arched top cover assembly.

[0009] The described rotating drum support assembly includes: a desorption air flow vertical pipe support bearing, a connecting piece arranged above the desorption air flow vertical pipe support bearing, an adjustment gasket group arranged between the desorption air flow vertical pipe support bearing and the connecting piece, a support shaft, a rotating drum support bearing, and an adjustment gasket group. The rotating drum support assembly is installed on the central bottom beam and is located at the center bottom of the adsorption machine chamber.

[0010] The described top air duct assembly includes a top cover connecting flange, a treated gas outlet pipe, and an inspection door; the top cover connecting flange is welded and fixed on the arched top cover assembly; the inspection door is arranged on the treated gas outlet pipe.

[0011] The described desorption air flow pipeline assembly includes a desorption air flow supply elbow that penetrates and is sealed and welded to the treated gas pipe, an expansion joint, a desorption air flow vertical pipe inside the rotating drum, a desorption air flow supply vertical pipe support frame fixedly connected to the rotating drum support assembly, a desorption air flow collection vertical pipe outside the rotating drum, and a desorption air flow outlet connection pipe; the desorption air flow supply elbow, the expansion joint, the desorption air flow vertical pipe inside the rotating drum, and the desorption air flow supply vertical pipe support frame are connected to form the desorption air flow pipeline inside the rotating drum; the desorption air flow collection vertical pipe outside the rotating drum and the desorption air flow outlet connection pipe are connected to form the desorption air flow pipeline outside the rotating drum.

[0012] The described rotary drum assembly includes a bottom sealing plate, a top sealing plate, a neck cylinder, a roller track ring, a dynamic and static seal between the neck cylinder and the top cover, and a sealing fixed cover. Components arranged between the bottom sealing plate and the top sealing plate include a separator and a molecular sieve element box; the bottom sealing plate at the bottom is fixed on the rotary drum support assembly; the roller track ring is arranged on the outer circle of the neck cylinder and is supported and cooperated with the rotary drum support assembly to keep the rotation axis perpendicular when the neck cylinder rotates.

[0013] The described guiding roller assembly includes rollers and a fixed bracket; the guiding roller assembly is fixed below the arched top cover assembly through the fixed bracket; the rollers on the fixed bracket cooperate with the roller track ring arranged on the outer circle of the neck cylinder to bear the radial tipping force of the rotary drum and keep the rotary drum vertical.

[0014] The described transmission assembly includes a rack or a fixed chain ring arranged on the outer circumference of the bottom sealing plate of the rotary drum, a transmission gear or a sprocket, the output shaft of a speed reducer, a speed reducer, a motor, etc. The speed reducer and the motor are arranged in the ambient air.

[0015] The described seal area assembly includes: an inner arc sealing plate of the rotary drum, an outer arc sealing plate of the rotary drum, sealing strips between the upper end of the inner arc plate and the top sealing plate, sealing strips between the lower end of the inner arc plate and the bottom sealing plate, sealing strips between the upper end of the outer arc plate and the top sealing plate, sealing strips between the lower end of the outer arc plate and the bottom sealing plate, inner vertical sealing strips installed on the molecular sieve element separator of the rotary drum, and outer vertical sealing strips of the cylinder; the inner arc sealing plate of the rotary drum is welded and fixed on the inner desorption gas flow vertical pipe of the rotary drum, and forms a sealing pair through the sealing strips between the upper end of the inner arc plate and the top sealing plate, the sealing strips between the lower end of the inner arc plate and the bottom sealing plate, and the inner vertical sealing strips installed on the molecular sieve element separator of the rotary drum to prevent mutual leakage between the desorption gas flow and the waste gas when the desorption gas flow passes through the rotary drum; the outer arc sealing plate of the rotary drum is welded and fixed on the outer desorption gas flow collecting vertical pipe of the rotary drum, and forms a sealing pair through the sealing strips between the upper end of the outer arc plate and the top sealing plate, the sealing strips between the lower end of the outer arc plate and the bottom sealing plate, and the outer vertical sealing strips of the cylinder to prevent mutual leakage between the desorption gas flow and the waste gas when the desorption gas flow comes out of the rotary drum.

[0016] The described transmission shaft seal assembly includes a stuffing box, sealing packing, and a stuffing gland. When strict requirements for controlling the leakage amount of the process gas in the equipment to the outside are needed, the stuffing box is provided with an isolation air chamber and a high-pressure gas inlet pipe for sealing.

[0017] The present invention, as a rotary drum type VOC adsorption mechanism, is characterized in that:

[0018] (1) A cylindrical shell and an arched top cover are adopted, which greatly improves the adaptability range of the equipment to the air pressure of the process gas flow, is beneficial to simplifying the shell structure, reducing the material consumption and cost, and expanding the application field of the equipment;

[0019] (2) Set the support shaft and bearing at the bottom of the rotary drum. Together with several guide roller groups outside the upper neck cylinder of the rotary drum, they form the rotary axis of the rotary drum. The rotary drum has small rotation yaw and good sealing effect between the desorption air flow and the treatment air flow. The guide roller groups are fixed on the structurally rigid parts of the top cover, with large bearing capacity. They are aligned with the outer track ring of the shaft neck cylinder at one time. Closed-type bearings are used, and basically no subsequent maintenance is required. Grease is added to the rotary drum support bearing, the vertical pipe support bearing of the desorption air flow inside the rotary drum, and the roller bearing through the grease pipeline outside the machine body, without the need to enter the machine body for operation;

[0020] (3) The reducer is directly connected to the drive motor. The whole is arranged in the ambient air at the lower part of the cylinder body, completely isolated from the treatment gas inside the cylinder body. A tight seal is set at the place where the drive shaft of the reducer enters the housing. The reducer and the motor do not need to consider explosion protection;

[0021] (4) The rotary drum is provided with an upper neck cylinder section. A dynamic and static seal is set between the neck cylinder and the arched top cover. It can be accessed through the inspection door hole on the air outlet duct after treatment. It is easy to repair and replace the sealing vulnerable parts; The coaxiality between the shaft neck cylinder body and the inner hole of the top cover is high, the sealing gap is small, and it can automatically adapt to the thermal expansion needs of the cylinder body;

[0022] (5) Vertical long inspection doors are set on both sides or one side of the desorption area of the cylindrical shell, which can be used to replace the molecular sieve element box and the axial sealing strip outside the rotary drum. The maintenance personnel can operate outside the shell. A manhole door is set at the lower part of the bottom sealing plate of the rotary drum of the cylindrical shell, for personnel to enter the lower space of the rotary drum to repair the support bearing when necessary. Brief Description of the Drawings

[0023] Figure 1 It is the structure diagram of the rotary drum type VOC adsorber;

[0024] Figure 2 It is the top view of the external shape;

[0025] Figure 3 It is the middle section view ( Figure 1 Section view A-A of

[0026] Figure 4 It is the structure diagram of the transmission device and the shaft seal ( Figure 3 Section view B-B of

[0027] Figure 5 It is the partial enlarged view of the structure of the top cover guide roller assembly. Detailed Implementation Modes

[0028] To make the present invention more obvious and understandable, preferred embodiments are given below and detailed descriptions are made in conjunction with the drawings as follows.

[0029] As shown in the attached Figures 1 to 5As shown in the figure, the rotary drum type VOC adsorber mainly includes a chassis assembly 1, a cylindrical shell assembly 2, an arched top cover assembly 3, a top air duct assembly 4, a rotary drum assembly 5, a desorption air flow pipeline assembly 6, a sealing area assembly 7, a rotary drum support assembly 8, a guiding roller assembly 9, a transmission assembly 10, and a transmission shaft sealing assembly 11;

[0030] The chassis assembly 1, cylindrical shell assembly 2, arched top cover assembly 3, and top air duct assembly 4 from bottom to top are connected by welding to form a chamber; the rotary drum support assembly 8 is located at the center bottom of the chamber to support the rotary drum assembly 5 and desorption air flow pipeline assembly 6 arranged at the center of the chamber; the inlet of the desorption air flow pipeline assembly 6 is connected to the top air duct assembly 4 by welding, and the lower part is fixedly welded to the rotary drum support assembly 8 through a desorption air flow supply vertical pipe support 6-4 and a connecting piece 8-2, and the desorption air flow collection vertical pipe 6-5 outside the rotary drum is fixedly welded to the cylindrical shell assembly 2; the sealing area assembly 7 is located between the rotary drum assembly 5 and the desorption air flow pipeline assembly 6; the guiding roller assembly 9 is fixed on the center hole ring beam 3-3; the transmission assembly 10 is arranged outside the reducer assembly space isolation vertical plate 2-7; the transmission shaft sealing assembly 11 is installed on the output shaft 10-3 of the reducer.

[0031] The functions, main compositions, positional relationships, and mating relationships of each component are further described as follows:

[0032] Chassis assembly 1: Used to connect the desorber and the equipment installation surface foundation, bear the load of the upper components, adopt the bottom surface bearing method to disperse the equipment load; it includes: a ring beam 1-1, a bottom shell plate 1-2, a center bottom beam 1-3, and a reducer installation frame 1-4; the ring beam 1-1, center bottom beam 1-3, and reducer installation frame 1-4 are connected by welding to form a load-bearing frame and are fixed on the bottom shell plate 1-2; the ring beam 1-1 and the bottom shell plate 1-2 are connected by sealed welding.

[0033] Cylindrical shell assembly 2: Used to isolate the ambient air and the air flow to be treated, bear the pressure difference between the waste gas and the environment, and bear the load of the upper components; it includes: a barrel body shell plate 2-1, vertical ribs 2-2, an upper connecting flange ring 2-3, an air flow to be treated connection pipe 2-4, a molecular sieve element disassembly and assembly door 2-5, a rotary drum bottom manhole door 2-6, a reducer assembly space isolation vertical plate 2-7, a reducer assembly space isolation top plate 2-8, and a transmission gear disassembly and assembly door 2-9; the barrel body shell plate 2-1 overlaps with the ring beam 1-1 and is connected by sealed welding; the vertical ribs 2-2 are the reinforcing ribs of the cylindrical shell assembly 2; the upper connecting flange ring 2-3 is located at the uppermost part and is connected to the arched top cover assembly 3 by a flange; the air flow to be treated connection pipe 2-4, the molecular sieve element disassembly and assembly door 2-5, and the rotary drum bottom manhole door 2-6 are arranged at appropriate positions on the barrel body shell plate 2-1; the positions of the reducer assembly space isolation vertical plate 2-7, the reducer assembly space isolation top plate 2-8, and the transmission gear disassembly and assembly door 2-9 correspond to the reducer installation frame 1-4.

[0034] Arch top cover assembly 3: used to isolate ambient air and the air flow to be processed, withstand the pressure difference between exhaust gas and the environment, and bear the load of the top member; including: cylindrical shell connection flange 3-1, top cover shell plate 3-2. Depending on the exhaust gas pressure, shapes such as a combination of a plane and a cylindrical surface, a combination of a frustum slope and a cylindrical surface (as shown in Figure 1 the figure), an upper arch curved surface, etc. can be adopted. Central hole ring beam 3-3, top cover strengthening beam 3-4; connection flange 3-1 is located at the bottom and is connected to the upper connection flange ring 2-3; the central hole ring beam 3-3 at the topmost part is connected to the cylindrical shell connection flange 3-1 at the lowermost part through the top cover strengthening beam 3-4 to form the framework of the arch top cover assembly 3.

[0035] Top air duct assembly 4: used to discharge the processed exhaust gas and introduce the desorption air flow; including: top cover connection flange 4-1, processed gas outlet pipe 4-2, inspection door 4-3; the top cover connection flange 4-1 is welded and fixed on the central hole ring beam 3-3; the inspection door 4-3 is arranged at a suitable position of the processed gas outlet pipe 4-2.

[0036] Rotating drum assembly 5: used to load molecular sieve elements; including: bottom sealing plate 5-1, top sealing plate 5-2, neck cylinder 5-3, roller track ring 5-4, dynamic and static seal 5-5 (packing or labyrinth seal teeth) between the neck cylinder and the top cover, sealing fixed cover 5-6. Components arranged between the bottom sealing plate and the top sealing plate include spacer 5-7 (both the inner and outer sides of the rotating drum are provided with sealing strip mounting plates), molecular sieve element box 5-8; the bottom sealing plate 5-1 at the bottom is fixed on the support shaft 8-4; the roller track ring 5-4 is arranged on the outer circle of the neck cylinder 5-3 and cooperates with the roller 9-1 to keep the rotation axis perpendicular when the rotating drum rotates.

[0037] Desorption air flow pipeline assembly 6: used to provide a dedicated passage isolated from the air flow passage for processing, and complete the desorption of the molecular sieve material in the rotating drum; including: desorption air flow supply elbow 6-1 (penetrating and welded and fixed on the processed gas pipe 4-2), expansion joint 6-2, desorption air flow vertical pipe 6-3 inside the rotating drum, desorption air flow supply vertical pipe support 6-4 (welded and fixed on the rotating drum support assembly 8 with the connecting piece 8-2), desorption air flow collection vertical pipe 6-5 outside the rotating drum (depending on the design wind speed limit, the collection vertical pipe can partially extend beyond the cylindrical shell 2-1 and is welded and fixed on the cylindrical shell 2-1), desorption air flow outlet connecting pipe 6-6. The desorption air flow supply elbow 6-1, expansion joint 6-2, desorption air flow vertical pipe 6-3 inside the rotating drum, and desorption air flow supply vertical pipe support 6-4 are connected to form the desorption air flow pipeline inside the rotating drum; the desorption air flow collection vertical pipe 6-5 outside the rotating drum and the desorption air flow outlet connecting pipe 6-6 are connected to form the desorption air flow pipeline outside the rotating drum.

[0038] Sealing area assembly 7: Used to isolate the exhaust gas and the desorption airflow, two sealing areas need to be set up; it includes: the inner arc sealing plate 7-1 of the rotary drum, the outer arc sealing plate 7-2 of the rotary drum (both 7-1 and 7-2 can each be provided with 2 independent arc sealing plates, or a single integral arc plate with desorption airflow ventilation holes in the middle can also be used), the sealing strip 7-3 between the upper end of the inner arc plate and the top sealing plate, the sealing strip 7-4 between the lower end of the inner arc plate and the bottom sealing plate, the sealing strip 7-5 between the upper end of the outer arc plate and the top sealing plate, the sealing strip 7-6 between the lower end of the outer arc plate and the bottom sealing plate, the inner vertical sealing strip 7-7 installed on the inner molecular sieve element separator 5-7 of the rotary drum, and the outer vertical sealing strip 7-8 of the drum; the inner arc sealing plate 7-1 of the rotary drum is welded and fixed on the inner desorption airflow vertical pipe 6-3 of the rotary drum, and a sealing pair is formed through the sealing strip 7-3 between the upper end of the inner arc plate and the top sealing plate, the sealing strip 7-4 between the lower end of the inner arc plate and the bottom sealing plate, and the inner vertical sealing strip 7-7 installed on the inner molecular sieve element separator 5-7 of the rotary drum to prevent mutual leakage between the desorption airflow and the exhaust gas when the desorption airflow passes through the rotary drum; the outer arc sealing plate 7-2 of the rotary drum is welded and fixed on the outer desorption airflow collection vertical pipe 6-5 of the rotary drum, and a sealing pair is formed through the sealing strip 7-5 between the upper end of the outer arc plate and the top sealing plate, the sealing strip 7-6 between the lower end of the outer arc plate and the bottom sealing plate, and the outer vertical sealing strip 7-8 of the drum to prevent mutual leakage between the desorption airflow and the exhaust gas when the desorption airflow comes out of the rotary drum.

[0039] Rotary drum support assembly 8: Used to bear the loads of the desorption airflow vertical pipe inside the drum and the rotary drum, and together with the guide roller group, it forms a stable rotary axis of the rotary drum; it includes: the support bearing 8-1 of the desorption airflow vertical pipe, the connecting piece 8-2 (located above the support bearing 8-1 of the desorption airflow vertical pipe), the adjusting gasket group 8-3 (located between 8-1 and 8-2), the support shaft 8-4 (located between 8-1 and 8-5), the rotary drum support bearing 8-5, and the adjusting gasket group 8-6. The rotary drum support assembly 8 is installed on the central bottom beam 1-3 at the center bottom of the adsorption machine chamber.

[0040] Guide roller assembly 9: Used to bear the radial tipping force of the rotary drum, more than 3 need to be evenly arranged, and together they form the upper rotary center of the rotary drum to ensure the long-term stable rotation of the rotary drum; it includes: the roller 9-1, the fixed bracket 9-2, etc. The guide roller assembly 9 is fixed on the central hole ring beam 3-3 through the fixed bracket 9-2; the roller 9-1 on the fixed bracket 9-2 cooperates with the roller track ring 5-4 arranged on the outer ring of the neck cylinder 5-3 to bear the radial tipping force of the rotary drum and keep the rotary drum vertical.

[0041] Drive assembly 10: Used to provide the driving force for the rotation of the rotary drum to ensure the continuous and stable operation of the rotary drum; it includes: the rack or fixed chain ring 10-1 arranged on the outer periphery of the bottom sealing plate of the rotary drum, the drive gear or sprocket 10-2, the output shaft 10-3 of the reducer, the reducer 10-4, the motor 10-5, etc.;

[0042] Transmission shaft sealing assembly 11: used to prevent the exhaust gas in the cylinder from leaking out; including: a packing seat 11-1, a sealing packing 11-2, a packing pressing cover 11-3, etc.

[0043] The outer shell of the equipment is generally divided into three layers for manufacturing and assembly, which are, from bottom to top: chassis 1 and cylindrical shell 2 assembly, top cover 3 and top cover air duct 4. The top cover 3 and cylindrical shell 2 are connected by flanges to facilitate centering operations during the assembly stage. Finally, the top cover 3 and lower cylinder 2 are also assembled into one piece before leaving the factory. The top cover air duct 4 can be transported independently from the factory and assembled on site when the transportation height is limited.

[0044] The top cover assembly and the drum assembly must be strictly aligned during assembly, that is, the inner hole wall of the top cover center hole ring beam 3-3 must be centered with the outer wall of the drum assembly neck tube 5-3. To improve the accuracy, the local area surface of the inner wall of the top cover center hole ring beam and the outer wall of the drum assembly neck tube where the sealing filler 5-5 is installed can be machined. After the top cover assembly 3 and the drum assembly are aligned, the guide roller assembly 9 is installed. The top cover 3 and the cylindrical shell 2 are connected by flange fasteners and (or) welding (welding is used when the sealing requirement is high).

[0045] The outer periphery of the roller track ring 5-4 arranged outside the neck tube 5-3 of the drum assembly needs to be machined together with the outer surface of the tube in the sealing packing area at the upper end of the neck tube, and the concentricity of the two cylindrical machined surfaces must be ensured to meet the requirements.

[0046] The guide roller assemblies 9 are evenly installed on the center hole ring beam 3-3 and need to be installed, adjusted and fixed before the top cover shell plate 3-2 is installed and after the top cover and the neck of the drum assembly are aligned.

[0047] The material of each sealing strip (7-3~7-8) needs to be determined according to the composition of the treated airflow and the maximum temperature of the desorption airflow. The sealing strip needs to be able to withstand the maximum temperature of the desorption airflow and the long-term erosion of the corrosive components contained in the exhaust gas.

[0048] When the waste gas pressure treated by the equipment is high or the waste gas contains highly toxic, corrosive, flammable and explosive components that need to be strictly controlled to prevent leakage to the ambient air, the packing seat 11-1 needs to be provided with an isolation air chamber 11-4, and an isolation gas with a pressure head higher than the waste gas in the cylinder, such as compressed air, nitrogen, argon, etc., is introduced through the air inlet pipe 11-5 to completely prevent the waste gas in the equipment from leaking to the environment. The equipment chassis 1, cylindrical shell 2, top cover 3 and top air duct 4 can be welded and other strict anti-leakage methods to prevent the waste gas from leaking out.

[0049] The isolation vertical plate 2-7 and the isolation top plate 2-8 in the shell assembly 2 partially enclose the installation space of the reducer 10-4 and the motor 10-5, so that they are directly located in the ambient air outside the cylinder, free from exhaust gas erosion, and no explosion-proof measures are required.

[0050] For each air duct interface, such as the inlet and outlet of the desorption air flow and the inlet and outlet of the air flow to be treated, circular cross-section pipe interfaces are preferably used, which can effectively simplify the local structure of the equipment, reduce the material consumption, improve the pressure resistance level, and enable the equipment to be used in occasions with higher exhaust gas pressure, such as gas purification equipment in the coking and metallurgical industries.

[0051] Considering that bearings (8-1 and 8-5) are connected above and below the support shaft 8-4, the support shaft needs to be machined integrally. Considering that the rotary drum is an assembled part and not machined integrally, there will inevitably be a rotational yaw phenomenon. The bearings 8-1 and 8-5 are preferably spherical thrust roller bearings that can withstand a certain range of yaw.

[0052] To basically eliminate the maintenance work of the guide roller assembly 9, the bearings equipped with the rollers are preferably fully enclosed bearings.

[0053] All bearings are lubricated with grease. Lubricating grease addition pipelines are provided on the non-rotating bearing seats and shafts and led to the outside of the equipment to facilitate regular lubricating oil addition.

Claims

1. The structure of a rotary VOC adsorber, characterized in that, It includes a chassis assembly, a cylindrical shell assembly, an arched top cover assembly, a top air duct assembly, a rotary drum assembly, a desorption air flow pipeline assembly, a sealing area assembly, a rotary drum support assembly, a guide roller assembly, a transmission assembly, and a transmission shaft sealing assembly; the chassis assembly, cylindrical shell assembly, arched top cover assembly, and top air duct assembly are connected by welding from bottom to top to form a chamber; the rotary drum support assembly is arranged at the center bottom of the chamber to support the rotary drum assembly and the desorption air flow pipeline assembly arranged at the center of the chamber; the inlet of the desorption air flow pipeline assembly is connected to the top air duct assembly, and the lower part is fixed on the rotary drum support assembly; the sealing area assembly is arranged between the rotary drum assembly and the desorption air flow pipeline assembly to seal and divide the rotary drum assembly and the desorption air flow pipeline assembly; the guide roller assembly is suspended below the arched top cover assembly and supports the rotary drum assembly from the side to bear the radial tipping force of the rotary drum; the transmission assembly is drivingly connected to the rotary drum assembly to provide rotational power; the transmission shaft sealing assembly seals the rotary drum assembly; The described chassis assembly includes a girdle beam, a bottom shell plate, a central bottom beam, and a reducer mounting frame; the girdle beam, central bottom beam, and reducer mounting frame are connected by welding to form a load-bearing frame and are fixed on the bottom shell plate; the girdle beam and the bottom shell plate are connected by seal welding; The described cylindrical shell assembly includes a barrel shell plate, vertical ribs, an upper connecting flange ring, an air flow to be treated connecting pipe, a molecular sieve element disassembly door, a rotary drum bottom manhole door, a reducer assembly space isolation vertical plate, a reducer assembly space isolation top plate, and a transmission gear disassembly door; the barrel shell plate overlaps with the girdle beam and is connected by seal welding; the vertical ribs are the strengthening ribs of the cylindrical shell assembly; the upper connecting flange ring is located at the uppermost part and is connected to the arched top cover assembly by a flange; the air flow to be treated connecting pipe, the molecular sieve element disassembly door, and the rotary drum bottom manhole door are arranged on the barrel shell plate; the positions of the reducer assembly space isolation vertical plate, the reducer assembly space isolation top plate, and the transmission gear disassembly door correspond to the reducer mounting frame; The described arched top cover assembly includes a cylindrical shell connecting flange, a top cover shell plate, a central hole girdle beam, and a top cover strengthening beam; the top cover shell plate can adopt a combination of a plane and a cylindrical surface, a combination of a frustum slope and a cylindrical surface, or an upwardly arched curved surface shape depending on the waste gas pressure; the connecting flange is located at the lowermost part and is connected to the upper connecting flange ring; the central hole girdle beam at the uppermost part is connected to the cylindrical shell connecting flange at the lowermost part through the top cover strengthening beam to form the framework of the arched top cover assembly; The described rotary drum assembly includes a bottom sealing plate, a top sealing plate, a neck cylinder, a roller track ring, a dynamic and static seal between the neck cylinder and the top cover, and a sealing fixed cover; components arranged between the bottom sealing plate and the top sealing plate include isolation members and molecular sieve element boxes; the bottom sealing plate located at the bottom is fixed on the rotary drum support assembly; the roller track ring is arranged on the outer circle of the neck cylinder and is in supporting cooperation with the rotary drum support assembly to keep the rotation axis perpendicular when the neck cylinder rotates; The described guide roller assembly includes rollers and a fixed bracket; the guide roller assembly is fixed below the arched top cover assembly through the fixed bracket; the rollers on the fixed bracket cooperate with the roller track ring arranged on the outer circle of the neck cylinder to bear the radial tipping force of the rotary drum and keep the rotary drum vertical; The described transmission assembly includes a rack or a fixed chain ring arranged on the outer periphery of the bottom sealing plate of the rotary drum, a transmission gear or a sprocket, the output shaft of the reducer, the reducer, and the motor. The reducer and the motor are arranged in the ambient air.

2. The structure of the rotary drum type VOC adsorber according to claim 1, wherein, The described rotary drum support assembly includes: a desorption air flow vertical pipe support bearing, a connecting piece arranged above the desorption air flow vertical pipe support bearing, an adjusting gasket group arranged between the desorption air flow vertical pipe support bearing and the connecting piece, a support shaft, a rotary drum support bearing, and an adjusting gasket group. The rotary drum support assembly is installed on the central bottom beam at the center bottom of the adsorption machine chamber.

3. The structure of the rotary drum type VOC adsorber according to claim 1, characterized in that, The described top air duct assembly includes a top cover connection flange, a processed gas outlet pipe, and a maintenance door; the top cover connection flange is welded and fixed on the arched top cover assembly; the maintenance door is arranged on the processed gas outlet pipe.

4. The structure of the rotary drum type VOC adsorber according to claim 3, characterized in that, The described desorption air flow pipeline assembly includes a desorption air flow supply elbow penetrating and sealed and welded to the processed gas pipe, an expansion joint, a desorption air flow vertical pipe inside the rotary drum, a desorption air flow supply air vertical pipe support frame fixedly connected to the rotary drum support assembly, a desorption air flow collection vertical pipe outside the rotary drum, and a desorption air flow outlet connection pipe; the desorption air flow supply elbow, the expansion joint, the desorption air flow vertical pipe inside the rotary drum, and the desorption air flow supply air vertical pipe support frame are connected to form the desorption air flow pipeline inside the rotary drum; the desorption air flow collection vertical pipe outside the rotary drum and the desorption air flow outlet connection pipe are connected to form the desorption air flow pipeline outside the rotary drum.

5. The structure of the rotary drum type VOC adsorber according to claim 1, characterized in that, The described sealing area assembly includes: an inner arc sealing plate of the rotary drum, an outer arc sealing plate of the rotary drum, a sealing strip between the upper end of the inner arc plate and the top sealing plate, a sealing strip between the lower end of the inner arc plate and the bottom sealing plate, a sealing strip between the upper end of the outer arc plate and the top sealing plate, a sealing strip between the lower end of the outer arc plate and the bottom sealing plate, an inner side vertical sealing strip installed on the rotary drum molecular sieve element separator, and a vertical sealing strip on the outer side of the cylinder; the inner arc sealing plate of the rotary drum is welded and fixed on the desorption air flow vertical pipe inside the rotary drum, and a sealing pair is formed through the sealing strip between the upper end of the inner arc plate and the top sealing plate, the sealing strip between the lower end of the inner arc plate and the bottom sealing plate, and the inner side vertical sealing strip installed on the rotary drum molecular sieve element separator to prevent mutual leakage between the desorption air flow and the waste gas when the desorption air flow passes through the rotary drum; the outer arc sealing plate of the rotary drum is welded and fixed on the desorption air flow collection vertical pipe outside the rotary drum, and a sealing pair is formed through the sealing strip between the upper end of the outer arc plate and the top sealing plate, the sealing strip between the lower end of the outer arc plate and the bottom sealing plate, and the vertical sealing strip on the outer side of the cylinder to prevent mutual leakage between the desorption air flow and the waste gas when the desorption air flow comes out of the rotary drum.

6. The structure of the rotary drum type VOC adsorber according to claim 1, characterized in that, The described transmission shaft sealing assembly includes a packing seat, a sealing packing, and a packing compression cover. The packing seat is provided with an isolation air chamber and a high-pressure gas inlet pipe for sealing.

Images