Naphthalene method phthalic anhydride pre-condenser device

Abstract

The invention relates to the technical field of condensers, in particular to a naphthalene method phthalic anhydride pre-condenser device which comprises a bottom frame and a condensing box fixedly connected to the bottom frame, a condensing unit is arranged on the bottom frame, and the two ends of the top of the condensing box are fixedly connected with an air inlet pipe and an exhaust pipe in a penetrating mode respectively. An upper cylinder and a lower cylinder are rotationally connected to the upper side and the lower side in the condensing box respectively, a liquid discharging pipe used for discharging phthalic anhydride liquid is fixedly connected to the inner side of the condensing box, a plurality of rotating cylinders are rotationally connected to the top end of the lower cylinder at equal intervals and communicate with the interior of the lower cylinder, and bottom plates are fixedly connected to the bottom ends of the inner sides of the rotating cylinders. Through the arrangement of the structure, the multiple condensation cylinders can be driven to rotate, then the positions of the condensation cylinders beside the naphthalene-process phthalic anhydride gas inlet pipe are changed, naphthalene-process phthalic anhydride gas can be conveniently and evenly condensed through cold air passing through the condensation cylinders, the condensation effect of the device is improved, and the condensation effect of the device is improved; and the cold air utilization effect of the device is good.

Description

Technical Field

[0001] The invention relates to the technical field of condensers, in particular to a naphthalene-based phthalic anhydride precondenser device. Background Art

[0002] Naphthalene-based phthalic anhydride is a production process that uses naphthalene as a raw material and undergoes a gas-phase oxidation reaction to produce phthalic anhydride. This method was once the earliest industrialized method for producing phthalic anhydride, and its raw material is tar naphthalene. The production process of phthalic anhydride from the naphthalene-based method involves mixing naphthalene with air, and then undergoing an oxidation reaction under the action of a catalyst to produce phthalic anhydride gas, which is then converted into liquid phthalic anhydride through a condenser.

[0003] The prior art discloses a naphthalene-based phthalic anhydride precondenser device with a publication number of CN119123853A. Through the use of a protective component, a phthalic anhydride sensor drives an electric telescopic rod to contract after detecting phthalic anhydride, and the electric telescopic rod drives a connecting gear to move, and a motor drives a thin shaft to rotate, and a baffle blocks an air outlet pipe, and the baffle also blocks an air inlet pipe, thereby achieving the effect of a sealing device, stopping the device from continuing to process phthalic anhydride gas, and fundamentally avoiding further leakage of phthalic anhydride gas. At the same time, a driven shaft drives a transmission blade to rotate, so that a decomposing agent is sprayed into an outer shell through a nozzle at the bottom of a liquid spraying circle, and the decomposing agent decomposes the phthalic anhydride gas for harmless treatment, thereby achieving the effect of treating phthalic anhydride gas leakage, closing the phthalic anhydride gas inlet and outlet, and decomposing the phthalic anhydride gas about to be inside the outer shell for harmless treatment, so that maintenance personnel can detect device leakage with confidence, and avoid the spread of phthalic anhydride gas leakage and endangering personal safety.

[0004] Although the above device can improve the safety performance of the device, there are still some defects in the actual use process. Since the positions between the condensation plates on the condenser are fixed, during the long-term condensation treatment of the naphthalene-based phthalic anhydride gas, the condensation efficiency of the condensation plate close to one end of the exhaust port will be much lower than the condensation efficiency of the condensation plate at the other end. As a result, some naphthalene-based phthalic anhydride gas can only be condensed after flowing to the rear end, which shortens the treatment time. It is necessary to increase the number of condensation plates to change it, thereby increasing the cost of equipment use. In addition, since there are more impurities in naphthalene-based phthalic anhydride, after the phthalic anhydride gas enters the condenser, the impurities in the material will solidify on some condensation plates, and then they will adhere to the condensation plate close to one end of the exhaust port. In the long run, it will affect the condensation effect of the front condensation plate, thereby affecting the condensation effect of the condenser.

[0005] Therefore, a naphthalene process phthalic anhydride precondenser device is proposed to solve the above problems. Summary of the invention

[0006] The object of the present invention is to solve the shortcomings in the background technology and to propose a naphthalene process phthalic anhydride precondenser device.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a naphthalene process phthalic anhydride pre-condenser device, comprising a base frame, and a condensing box fixedly connected to the base frame, the base frame is provided with a condensing unit, the top two ends of the condensing box are respectively penetrated and fixedly connected with an inlet pipe and an exhaust pipe, the upper and lower sides of the condensing box are respectively rotatably connected with an upper cylinder and a lower cylinder, the inner side of the condensing box is fixedly connected with a drain pipe for discharging phthalic anhydride liquid, the top of the lower cylinder is equidistantly rotatably connected with a plurality of rotating cylinders, the plurality of rotating cylinders are connected with the interior of the lower cylinder, the bottom end of the inner side of the rotating cylinder is fixedly connected with a bottom plate, condensing cylinders are arranged on both sides of the rotating cylinder, the outer wall of the lower cylinder is fixedly connected with a gear ring, the bottom end of the condensing box is rotatably connected with a gear meshing with the gear ring, the rear side of the condensing box and above the gear is penetrated and fixedly connected with a rear frame, the bottom end of the rear frame is fixedly connected with a driving motor, the output end of the driving motor passes through the bottom of the rear frame and is fixedly connected with the gear, and a replacement mechanism for replacing the position of the condensing cylinder is provided on the rotating cylinder.

[0008] In the above technical solution, further, the upper cylinder and the lower cylinder are fixedly connected to the side away from each other with a rotary joint, and the fixed ends of the rotary joint are respectively connected to the upper cylinder and the lower cylinder, the rotary end of the rotary joint located at the bottom is fixedly connected to the cold air discharge end of the condensing unit, the rotary end of the rotary joint located at the top is fixedly connected to the return air pipe, and the other end of the return air pipe is fixedly connected to the gas recovery end of the condensing unit.

[0009] In the above technical scheme, further, the replacement mechanism includes an arc-shaped plate, the bottom of the upper cylinder and the corresponding position of the rotating cylinder are fixedly connected with a fixed cylinder, the top of the rotating cylinder is rotatably connected to the bottom of the fixed cylinder, the top of the bottom plate is fixedly connected with an extrusion cylinder, a pair of through holes are opened on both sides of the outer wall of the rotating cylinder, a pair of guide rollers are rotatably connected to the top of the inner side of the rotating cylinder, a pair of elastic ropes are fixedly connected to the side walls of the condensing cylinder, a sliding groove is opened on the side wall of the fixed cylinder, a sliding plate is slidably connected to the inner side of the sliding groove, a round rod is fixedly connected to the side wall of the sliding plate, a straight rod is fixedly connected to the bottom end of the sliding plate, an L-shaped plate is fixedly connected to the bottom end of the straight rod and located on the inner side of the extrusion cylinder, a rotating mechanism for driving the extrusion cylinder to rotate is provided on the L-shaped plate, the arc plate is fixedly connected to the inner side of the condensation box, and the side wall of the arc plate is inclined with an extrusion groove for extruding the round rod.

[0010] In the above technical solution, further, a pull ring is provided on the inner side of the rotating cylinder, the other end of the elastic rope passes through the through hole and passes from above the guide roller to be fixedly connected to the top of the pull ring, a push ring is fixedly connected to the outer wall of the straight rod and located above the pull ring, a plurality of upper springs are fixedly connected between the outer wall of the rotating cylinder and the outer wall of the condensing cylinder, and a lower spring is fixedly connected between the inner side of the fixed cylinder and the top of the slide plate.

[0011] In the above technical solution, further, a lower hose is fixedly connected through the inner side of the rotating cylinder and the inner side of the condensing cylinder, an annular exhaust frame is fixedly connected to the bottom end of the outer wall of the fixed cylinder, and a sealing ring is sealingly and rotatably connected to the bottom of the exhaust frame, an upper hose is fixedly connected between the bottom of the sealing ring and the top of the condensing cylinder, and a pair of air guide frames are fixedly connected between the top of the exhaust frame and the bottom of the upper cylinder.

[0012] In the above technical scheme, further, the rotating mechanism includes an extrusion rod, which is slidably connected to the side wall of the L-shaped plate, and a return spring is fixedly connected between the outer wall of the L-shaped plate and the side wall of the L-shaped plate. A pair of vertical grooves are opened on the inner side of the extrusion cylinder, and a semi-spiral groove is opened between the vertical grooves, and the two ends of the semi-spiral groove are respectively connected with the upper and lower ends of adjacent vertical grooves, an extension groove is opened at the top end of the vertical groove, and an inward groove is opened at the bottom end of the vertical groove, and the connection between the groove and the semi-spiral groove is inclined.

[0013] In the above technical solution, further, the top end of the groove is inclined, the extrusion rod is inserted into the elongated groove, and the end of the extrusion rod is set to a smooth arc surface.

[0014] In the above technical solution, further, an annular groove is opened at the top of the lower cylinder and located on the outside of the rotating cylinder, a pair of transverse grooves are symmetrically opened on the inside of the annular groove, a round block is fixedly connected to the bottom of the condensing cylinder, and the round block is slidably connected to the inside of the transverse groove, and the connection between the transverse groove and the annular groove is set as an arc surface.

[0015] In the above technical solution, further, a positioning cylinder is fixedly connected to the side wall of the condensing cylinder at a position corresponding to the through hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can drive multiple condensing cylinders to rotate by setting structures such as a driving motor, a gear and a gear ring, thereby changing the position of the condensing cylinders beside the naphthalene process phthalic anhydride gas inlet pipe, so that the cold air passing through the condensing cylinders can evenly condense the naphthalene process phthalic anhydride gas, which not only improves the condensation effect of the device, but also improves the cold air utilization effect of the device.

[0017] 2. The present invention can alternately switch the positions of the inner and outer condensing cylinders during the rotation of the condensing cylinder by setting up structures such as a replacement mechanism and a rotating mechanism, thereby further improving the condensing effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall appearance structure of the condenser device of the present invention; Figure 2 It is a partially cutaway three-dimensional structural schematic diagram of the front side of the condenser device of the present invention; Figure 3 It is a schematic diagram of the overall appearance structure of the condensation box of the present invention; Figure 4 It is a schematic diagram of the overall appearance structure of the upper cylinder, the lower cylinder and the gear of the present invention; Figure 5 It is a schematic diagram of the overall appearance structure of the curved plate of the present invention; Figure 6 It is a schematic diagram of the overall appearance structure of the rotating cylinder, the fixed cylinder and the condensing cylinder of the present invention; Figure 7 It is a schematic diagram of the full-cut three-dimensional structure of the lower cylinder of the present invention; Figure 8 It is a schematic diagram of the full-section three-dimensional structure of the rotating drum of the present invention from the front; Fig. 9 The appended Figure 8 A schematic diagram of the partially enlarged structure at center A; Fig.10 It is a schematic diagram of the three-dimensional structure of the cross section of the skateboard and the L-shaped board of the present invention.

[0019] In the figure: 1, base frame; 2, condensing box; 3, condensing unit; 4, air inlet pipe; 5, exhaust pipe; 6, upper cylinder; 7, lower cylinder; 8, rotating joint; 9, return pipe; 10, drain pipe; 11, rotating cylinder; 12, bottom plate; 13, condensing cylinder; 14, fixed cylinder; 15, gear ring; 16, gear; 17, rear frame; 18, driving motor; 19, extrusion cylinder; 20, perforation; 21, elastic rope; 22, pull ring; 23, guide roller; 24, slideway; 25, Slide plate; 26, round rod; 27, straight rod; 28, L-shaped plate; 29, extrusion groove; 30, push ring; 31, upper spring; 32, lower spring; 33, lower hose; 34, exhaust frame; 35, sealing ring; 36, upper hose; 37, air guide frame; 38, extrusion rod; 39, return spring; 40, vertical groove; 41, semi-spiral groove; 42, extension groove; 43, groove; 44, horizontal groove; 45, round block; 46, arc plate; 47, annular groove; 48, positioning cylinder. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] like Figure 1-10A naphthalene-based phthalic anhydride precondenser device is shown, comprising a base frame 1, and a condensing box 2 fixedly connected to the base frame 1, a condensing unit 3 is provided on the base frame 1, and the condensing unit 3 mainly compresses the refrigerant into a high-temperature and high-pressure gaseous state through a compressor, and then sends it into a condenser, in the condenser, the high-temperature and high-pressure gaseous refrigerant exchanges heat with the naphthalene-based phthalic anhydride gas through a condensing cylinder 13 of the condenser, in this process, the naphthalene-based phthalic anhydride gas reaches its condensation point, and begins to change from a gaseous state to a liquid state, and then falls into the bottom end of the condensing box 2, and is processed and discharged through a drain pipe 10, and the top two ends of the condensing box 2 are respectively penetrated and fixedly connected with an inlet pipe 4 and an exhaust pipe 5, and the exhaust pipe 5 and the drain pipe 10 are provided with a naphthalene-based phthalic anhydride gas processing mechanism to avoid the discharge of the naphthalene-based phthalic anhydride gas. The upper cylinder 6 and the lower cylinder 7 are rotatably connected respectively, a drain pipe 10 for discharging phthalic anhydride liquid is fixedly connected to the inner side of the condensing box 2, a plurality of rotating cylinders 11 are equidistantly rotatably connected to the top of the lower cylinder 7, the plurality of rotating cylinders 11 are connected to the inside of the lower cylinder 7, a bottom plate 12 is fixedly connected to the inner bottom end of the rotating cylinder 11, condensing cylinders 13 are arranged on both sides of the rotating cylinder 11, a gear ring 15 is fixedly connected to the outer wall of the lower cylinder 7, a gear 16 meshing with the gear ring 15 is rotatably connected to the inner bottom end of the condensing box 2, a rear frame 17 is fixedly connected to the rear side of the condensing box 2 and is located above the gear 16, a driving motor 18 is fixedly connected to the inner bottom end of the rear frame 17, the output end of the driving motor 18 passes through the bottom of the rear frame 17 and is fixedly connected to the gear 16, and a replacement mechanism for replacing the position of the condensing cylinder 13 is provided on the rotating cylinder 11; The upper cylinder 6 and the lower cylinder 7 are both fixedly connected to a rotating joint 8 on the side away from each other, and the fixed ends of the rotating joint 8 are respectively connected to the inside of the upper cylinder 6 and the lower cylinder 7, the rotating end of the rotating joint 8 located at the bottom is fixedly connected to the cold air discharge end of the condensing unit 3, and the rotating end of the rotating joint 8 located at the top is fixedly connected to the return air pipe 9, and the other end of the return air pipe 9 is fixedly connected to the gas recovery end of the condensing unit 3; A lower hose 33 is fixedly connected between the inner side of the rotating cylinder 11 and the inner side of the condensing cylinder 13, and the lower hose 33 is connected to the inside of the rotating cylinder 11 and the inside of the condensing cylinder 13. An annular exhaust frame 34 is fixedly connected to the bottom end of the outer wall of the fixed cylinder 14, and a sealing ring 35 is sealingly and rotatably connected to the bottom of the exhaust frame 34. An upper hose 36 is fixedly connected between the bottom of the sealing ring 35 and the top of the condensing cylinder 13. The upper hose 36 is connected to the inside of the exhaust frame 34 and the inside of the condensing cylinder 13. By setting the upper hose 36 and the lower hose 33, the movement of the condensing cylinder 13 is avoided from being hindered, and the normal transfer of the condensing medium in the condensing cylinder 13 is ensured. A pair of air guide frames 37 are fixedly connected between the top of the exhaust frame 34 and the bottom of the upper cylinder 6, and the air guide frame 37 is connected to the exhaust frame 34 and the inside of the upper cylinder 6; When in use, the naphthalene-based phthalic anhydride gas is discharged into the condenser box 2 through the air inlet pipe 4, and then the condensing unit 3 is controlled to start, and the cold air is discharged into the lower cylinder 7 through the rotary joint 8, and then the cold air is discharged into the rotating cylinder 11, and then discharged into the condensing cylinder 13 through the lower hose 33, and the naphthalene-based phthalic anhydride gas in the condenser box 2 is condensed. Then the condensing medium in the condensing cylinder 13 is discharged from the upper hose 36 into the exhaust frame 34, and then discharged into the upper cylinder 6 through the air guide frame 37, and then returned to the condensing unit 3 through the rotary joint 8 and the return pipe 9 for refrigeration treatment. During this process, the drive motor 18 can be controlled to start the driving gear 16 to rotate, which in turn drives the meshing gear ring 15 to rotate. At the same time, the rotary joint 8 is driven to rotate on the air outlet end and the return air pipe 9 of the condensing unit 3 to avoid hindering the rotation of the upper cylinder 6 and the lower cylinder 7, while ensuring the normal circulation of the condensing medium, thereby changing the position of the condensing cylinder 13 next to the naphthalene phthalic anhydride gas inlet pipe 4, so that the cold air passing through the condensing cylinder 13 can evenly condense the naphthalene phthalic anhydride gas, which not only improves the condensation effect of the device, but also the cold air utilization effect of the device.

[0023] In order to be able to pull the inner and outer condensing cylinders 13 together during the rotation of the condensing cylinder 13, so as to facilitate the subsequent replacement of the positions of the inner and outer condensing cylinders 13, the replacement mechanism includes an arc plate 46, the bottom of the upper cylinder 6 and the position corresponding to the rotating cylinder 11 are fixedly connected with a fixed cylinder 14, the top of the rotating cylinder 11 is rotatably connected to the bottom of the fixed cylinder 14, the top of the bottom plate 12 is fixedly connected with an extrusion cylinder 19, a pair of through holes 20 are opened on both sides of the outer wall of the rotating cylinder 11, and a pair of guide rollers 23 are rotatably connected to the top of the inner side of the rotating cylinder 11. Through the setting of the guide rollers 23, the elastic rope 21 can be adjusted. The sliding plays a guiding role. The side walls of the condensing cylinder 13 are fixedly connected with a pair of elastic ropes 21. The side wall of the fixed cylinder 14 is provided with a slide groove 24. A slide plate 25 is slidably connected inside the slide groove 24. A round rod 26 is fixedly connected to the side wall of the slide plate 25. A straight rod 27 is fixedly connected to the bottom end of the slide plate 25. An L-shaped plate 28 is fixedly connected to the bottom end of the straight rod 27 and located inside the extrusion cylinder 19. A rotating mechanism for driving the extrusion cylinder 19 to rotate is provided on the L-shaped plate 28. The arc plate 46 is fixedly connected to the inside of the condensing box 2, and an extrusion groove 29 for extruding the round rod 26 is obliquely provided on the side wall of the arc plate 46. A pull ring 22 is provided on the inner side of the rotating cylinder 11, and the other end of the elastic rope 21 passes through the through hole 20 and passes through the guide roller 23 to be fixedly connected to the top of the pull ring 22. A push ring 30 is fixedly connected to the outer wall of the straight rod 27 and located above the pull ring 22. A plurality of upper springs 31 are fixedly connected between the outer wall of the rotating cylinder 11 and the outer wall of the condensing cylinder 13, and the upper springs 31 facilitate pushing the condensing cylinder 13 to reset. A lower spring 32 is fixedly connected between the inner side of the fixed cylinder 14 and the top of the slide plate 25, and the lower spring 32 is provided to facilitate pulling the slide plate 25 to reset. When the driving motor 18 drives the lower cylinder 7 to rotate, the round rods 26 next to the fixed cylinder 14 will be driven to move to the arc plate 46 one by one, and then the round rods 26 will be squeezed downward through the extrusion grooves 29 on the arc plate 46 to slide downward, and at the same time, the slide plate 25 will be driven to slide on the inner side of the slide groove 24, and the straight rod 27 will be driven to slide downward, and the lower spring 32 will be gradually stretched, and then the pull ring 22 will be pushed downward through the push ring 30, thereby pulling the elastic rope 21 to drive the condensation cylinder 13 to move toward the middle and gradually compress the upper spring 31. At the same time, the L-shaped plate 28 will be driven to move downward, and the extrusion rod 38 will be driven to slide in the extension groove 42, and then the push ring 30 will be pushed into the extrusion cylinder 19, and the positioning cylinder 48 will be inserted into the through hole 20, so that the two condensation cylinders 13 are pulled together, which is convenient for the subsequent rotation and replacement of the two condensation cylinders 13 at the bottom.

[0024] In order to be able to alternately change the position between the inner and outer condensing cylinders 13, the rotating mechanism includes an extrusion rod 38, which penetrates and slides through the side wall of the L-shaped plate 28, and a return spring 39 is fixedly connected between the outer wall of the L-shaped plate 28 and the side wall of the L-shaped plate 28. A pair of vertical grooves 40 are provided on the inner side of the extrusion cylinder 19, and a semi-spiral groove 41 is provided between the vertical grooves 40, and the two ends of the semi-spiral groove 41 are respectively connected to the upper and lower ends of the adjacent vertical grooves 40, and an elongated groove 42 is provided at the top of the vertical groove 40, and a sunken groove 43 is provided at the bottom of the vertical groove 40, and the connection between the groove 43 and the semi-spiral groove 41 is inclined; The top of the groove 43 is tilted, so that when the extrusion rod 38 slides into the groove 43 to reset, the extrusion cylinder 19 is pushed to rotate by the pulling of the extrusion rod 38, thereby ensuring that the extrusion rod 38 slides into the semi-helical groove 41, and the extrusion rod 38 is inserted into the elongated groove 42. The end of the extrusion rod 38 is set to a smooth arc surface, which can facilitate the extrusion rod 38 to slide out of the groove 43 smoothly. When the driving motor 18 drives the lower cylinder 7 to rotate, the round rod 26 continues to slide downward under the extrusion of the extrusion groove 29. When the two condensing cylinders 13 are pulled to the outer wall of the rotating cylinder 11, the push ring 30 will push the pull ring 22 into the extrusion cylinder 19, and drive the extrusion rod 38 to slide to the bottom end of the vertical groove 40 and be located next to the groove 43, and then push the extrusion rod 38 into the groove 43 under the elastic force of the reset spring 39. At the same time, the continued movement of the pull ring 22 will pull the elastic rope 21 to deform, and at the same time, the round rod 26 will slide out of the extrusion groove 29, thereby releasing the extrusion of the round rod 26, and then pull the slide plate 25 to reset under the elastic force of the lower spring 32, and pull the straight rod 27, the L-shaped plate 28 and the extrusion The rod 38 slides upward to reset. Due to the step between the groove 43 and the vertical groove 40, the rod 38 is restricted and the inclined surface at the top of the groove 43 is set. The extrusion cylinder 19 is pushed to rotate under the extrusion of the extrusion rod 38, thereby driving the bottom plate 12, the rotating cylinder 11 and the condensing cylinder 13 to rotate. Then the extrusion rod 38 slides out of the groove 43 and slides into the semi-spiral groove 41, and pushes the extrusion rod 38 outward while stretching the reset spring 39. Then the extrusion rod 38 slides out of the semi-spiral groove 41 and slides into the vertical groove 40, completing the position conversion of the inner and outer wall condensing cylinder 13. Then the straight rod 27 and the slide plate 25 are reset, and the push on the pull ring 22 is released. Then the condensing cylinder 13 is pushed to reset under the elastic force of the upper spring 31.

[0025] In order to improve the stability of the device during operation, an annular groove 47 is opened at the top of the lower cylinder 7 and located on the outside of the rotating cylinder 11, and a pair of transverse grooves 44 are symmetrically opened on the inner side of the annular groove 47. A round block 45 is fixedly connected to the bottom of the condensing cylinder 13, and the round block 45 is slidably connected to the inner side of the transverse groove 44. The setting of the annular groove 47 and the transverse groove 44 can guide the conversion process of the condensing cylinder 13, further improving the stability of the device during operation. The connection between the transverse groove 44 and the annular groove 47 is set as an arc surface, which is convenient for the round block 45 to slide into the transverse groove 44.

[0026] In order to further improve the stability of the device during operation, a positioning cylinder 48 is fixedly connected to the side wall of the condensing cylinder 13 and at a position corresponding to the perforation 20. Through the setting of the positioning cylinder 48, when the condensing cylinder 13 is pulled toward the middle, when the block 45 slides out of the transverse groove 44, the positioning cylinder 48 will be driven to insert into the perforation 20, thereby starting the positioning effect on the condensing cylinder 13, ensuring that the subsequent rotating cylinder 11 drives the condensing cylinder 13 to rotate, and at the same time ensuring that the rotated block 45 is pushed into the transverse groove 44 under the elastic force of the upper spring 31, further improving the stability of the device during operation.

[0027] The basic principles, main features and advantages of the present invention are shown and described above.

[0028] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A naphthalene-based phthalic anhydride precondenser device, comprising a base frame (1), and a condensing box (2) fixedly connected to the base frame (1), wherein a condensing unit (3) is provided on the base frame (1), characterized in that: The two ends of the top of the condensing box (2) are respectively penetrated and fixedly connected with an air inlet pipe (4) and an air outlet pipe (5); the upper and lower sides of the condensing box (2) are respectively rotatably connected with an upper cylinder (6) and a lower cylinder (7); the inner side of the condensing box (2) is fixedly connected with a liquid discharge pipe (10) for discharging phthalic anhydride liquid; the top of the lower cylinder (7) is rotatably connected with a plurality of rotating cylinders (11) at equal intervals; the plurality of rotating cylinders (11) are connected to the interior of the lower cylinder (7); the bottom end of the inner side of the rotating cylinder (11) is fixedly connected with a bottom plate (12); and both sides of the rotating cylinder (11) are provided with A condensing cylinder (13) is provided, the outer wall of the lower cylinder (7) is fixedly connected to a gear ring (15), the inner bottom end of the condensing box (2) is rotatably connected to a gear (16) meshing with the gear ring (15), a rear frame (17) is fixedly connected through the rear side of the condensing box (2) and located above the gear (16), the inner bottom end of the rear frame (17) is fixedly connected to a driving motor (18), the output end of the driving motor (18) passes through the bottom of the rear frame (17) and is fixedly connected to the gear (16), and a replacement mechanism for replacing the position of the condensing cylinder (13) is provided on the rotating cylinder (11).

2. A naphthalene-based phthalic anhydride precondenser device according to claim 1, characterized in that: A rotating joint (8) is fixedly connected to the side of the upper cylinder (6) and the lower cylinder (7) that is away from each other, and the fixed ends of the rotating joint (8) respectively penetrate and communicate with the interior of the upper cylinder (6) and the lower cylinder (7), the rotating end of the rotating joint (8) located at the bottom is fixedly connected to the cold air discharge end of the condensing unit (3), and the rotating end of the rotating joint (8) located at the top is fixedly connected to the return air pipe (9), and the other end of the return air pipe (9) is fixedly connected to the gas recovery end of the condensing unit (3).

3. A naphthalene-based phthalic anhydride precondenser device according to claim 1, characterized in that: The replacement mechanism comprises an arc-shaped plate (46); the bottom of the upper cylinder (6) and the position corresponding to the rotating cylinder (11) are fixedly connected to a fixed cylinder (14); the top of the rotating cylinder (11) is rotatably connected to the bottom of the fixed cylinder (14); the top of the bottom plate (12) is fixedly connected to an extrusion cylinder (19); a pair of through holes (20) are provided on both sides of the outer wall of the rotating cylinder (11); the top of the inner side of the rotating cylinder (11) is rotatably connected to a pair of guide rollers (23); the side walls of the condensing cylinder (13) are fixedly connected to a pair of elastic ropes (21); the side walls of the fixed cylinder (14) are provided with A slide groove (24), the inner side of which is slidably connected to a slide plate (25), the side wall of which is fixedly connected to a round rod (26), the bottom end of which is fixedly connected to a straight rod (27), the bottom end of which is located inside an extrusion cylinder (19) and fixedly connected to an L-shaped plate (28), the L-shaped plate (28) being provided with a rotating mechanism for driving the extrusion cylinder (19) to rotate, the arc plate (46) being fixedly connected to the inner side of a condensation box (2), and the side wall of which is inclinedly provided with an extrusion groove (29) for extruding the round rod (26).

4. A naphthalene-based phthalic anhydride precondenser device according to claim 3, characterized in that: A pull ring (22) is provided on the inner side of the rotating cylinder (11), the other end of the elastic rope (21) passes through the through hole (20) and passes through the top of the guide roller (23) and is fixedly connected to the top of the pull ring (22), a push ring (30) is fixedly connected to the outer wall of the straight rod (27) and located above the pull ring (22), a plurality of upper springs (31) are fixedly connected between the outer wall of the rotating cylinder (11) and the outer wall of the condensing cylinder (13), and a lower spring (32) is fixedly connected between the inner side of the fixed cylinder (14) and the top of the slide plate (25).

5. A naphthalene-based phthalic anhydride precondenser device according to claim 3, characterized in that: A lower hose (33) is fixedly connected through the inner side of the rotating cylinder (11) and the inner side of the condensing cylinder (13); an annular exhaust frame (34) is fixedly connected to the bottom end of the outer wall of the fixed cylinder (14); a sealing ring (35) is sealingly and rotatably connected to the bottom of the exhaust frame (34); an upper hose (36) is fixedly connected between the bottom of the sealing ring (35) and the top of the condensing cylinder (13); and a pair of air guide frames (37) are fixedly connected between the top of the exhaust frame (34) and the bottom of the upper cylinder (6).

6. A naphthalene-based phthalic anhydride precondenser device according to claim 3, characterized in that: The rotating mechanism comprises an extrusion rod (38), the extrusion rod (38) penetrates and is slidably connected to the side wall of the L-shaped plate (28), a return spring (39) is fixedly connected between the outer wall of the L-shaped plate (28) and the side wall of the L-shaped plate (28), a pair of vertical grooves (40) are provided on the inner side of the extrusion cylinder (19), a semi-spiral groove (41) is provided between the vertical grooves (40), and the two ends of the semi-spiral groove (41) are respectively connected to the upper and lower ends of adjacent vertical grooves (40), an elongated groove (42) is provided at the top end of the vertical groove (40), and an inwardly sunken groove (43) is provided at the bottom end of the vertical groove (40), and the connection between the groove (43) and the semi-spiral groove (41) is inclined.

7. A naphthalene-based phthalic anhydride precondenser device according to claim 6, characterized in that: The top end of the groove (43) is arranged to be inclined, the extrusion rod (38) is inserted into the elongated groove (42), and the end of the extrusion rod (38) is arranged to be a smooth arc surface.

8. A naphthalene-based phthalic anhydride precondenser device according to claim 1, characterized in that: An annular groove (47) is provided at the top of the lower cylinder (7) and located on the outside of the rotating cylinder (11); a pair of transverse grooves (44) are symmetrically provided inside the annular groove (47); a round block (45) is fixedly connected to the bottom of the condensing cylinder (13), and the round block (45) is slidably connected to the inside of the transverse groove (44); and the connection between the transverse groove (44) and the annular groove (47) is arranged as an arc surface.

9. A naphthalene-based phthalic anhydride precondenser device according to claim 3, characterized in that: A positioning cylinder (48) is fixedly connected to the side wall of the condensing cylinder (13) at a position corresponding to the through hole (20).

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