Naphthalene method phthalic anhydride pre-condenser device

Abstract

The invention discloses a naphthalene method phthalic anhydride pre-condenser device, and relates to the technical field of condensers, the naphthalene method phthalic anhydride pre-condenser device comprises a supporting base, through use of a protection assembly, a phthalic anhydride sensor can drive an electric telescopic rod to contract after detecting phthalic anhydride, the electric telescopic rod drives a connecting gear to move, a motor drives a thin shaft to rotate, and a baffle blocks an air outlet pipe; and meanwhile, the driven shaft drives the transmission blades to rotate, so that a decomposing agent is sprayed into the shell through the nozzles at the bottom of the liquid spraying ring, and the decomposing agent decomposes the phthalic anhydride gas for harmless treatment, so that the phthalic anhydride gas can be recycled. And the phthalic anhydride gas inlet and outlet is closed, and the phthalic anhydride gas in the shell is decomposed and harmlessly treated, so that maintenance personnel can detect the leakage condition of the device safely, and the harm to personal safety due to the leakage and diffusion of the phthalic anhydride gas is avoided.

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] The naphthalene-based phthalic anhydride precondenser device is an important equipment used in the production of naphthalene-based phthalic anhydride. Its function is to cool and preliminarily separate the reaction gas during the production process. Its structure usually includes a shell, a cooling tube group, an inlet and outlet pipes and other parts. When working, the high-temperature reaction gas is cooled in the cooling tube group, and the phthalic anhydride condenses into liquid under the cooling effect to achieve preliminary separation. The device has the advantages of efficient cooling, energy saving and environmental protection, and can significantly improve the output and quality of naphthalene-based phthalic anhydride.

[0003] Phthalic anhydride, also known as phthalic anhydride, is toxic and may cause symptoms such as bronchitis, eye inflammation, and emphysema. It is also irritating to the skin. Since the pre-condenser device is filled with phthalmic anhydride gas, there is a certain pressure inside it. Due to damage and aging of the sealing strip of the pre-condenser device, the gas inside it is easy to leak, causing harm to the staff.

[0004] Phthalic anhydride condenses from gas into liquid under the action of cooling and adheres to the condenser. After accumulating a certain amount, it flows into the storage device along the condenser. If the device is closed after condensing all the phthalic anhydride gas, some phthalic anhydride liquid will still adhere to the inside. The device collects this part of phthalic anhydride liquid. At the same time, too much phthalic anhydride liquid adheres to the condenser, isolating the condenser from the phthalic anhydride gas, thereby affecting the condensation conversion rate of the condenser. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a naphthalene-based phthalic anhydride precondenser device, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a naphthalene-based phthalic anhydride pre-condenser device, used for condensing phthalic anhydride gas and avoiding the hazard of its leakage, the naphthalene-based phthalic anhydride pre-condenser device comprising a supporting base, a condensing component for condensing phthalic anhydride gas is arranged on the top of the supporting base, a lower liquid component for collecting liquid is arranged inside the condensing component, a recovery component for condensing phthalic anhydride gas in the tail gas is arranged inside the condensing component, and a protective component for handling phthalic anhydride gas leakage is arranged on the top of the supporting base.

[0009] Furthermore, the condensation assembly includes an outer shell fixedly connected to the top of the support base, a collecting bucket fixedly connected to the bottom of the outer shell, a motor fixedly connected to the top of the support base, a support frame fixedly connected to the rear of the outer shell, an active rod rotatably connected inside the support frame, the bottom of the active rod is fixedly connected to the output shaft of the motor, the top of the active rod is rotatably connected to a pull rod, the top of the pull rod is rotatably connected to a lifting rod, the bottom of the lifting rod is fixedly connected to a scraping ring, the scraping ring is slidably connected to the inside of the outer shell, and a scraping strip is fixedly connected inside the scraping ring.

[0010] Furthermore, a recovery bin is fixedly connected to the top of the outer shell, a condensation plate is fixedly connected to the bottom of the recovery bin, the condensation plate is located inside the scraper strip, an air intake pipe is fixedly connected to the outside of the outer shell, a cooling device is fixedly connected to the outside of the support base, a liquid separation pipe is fixedly connected to the bottom of the condensation plate, the liquid separation pipe is fixedly connected to the cooling device, a liquid return pipe is fixedly connected to the top of the cooling device, the liquid return pipe is fixedly connected to the recovery bin, a down liquid pipe is fixedly connected to the bottom of the collecting bucket, and a storage box is fixedly connected to the bottom of the down liquid pipe.

[0011] Furthermore, the down liquid assembly includes a bottom hole opened inside the down liquid pipe, a positioning block is fixedly connected inside the down liquid pipe, a sliding rod is slidably connected inside the positioning block, the diameter of the sliding rod is smaller than the diameter of the bottom hole, a buoyancy block is fixedly connected to the top of the sliding rod, a rubber ring is fixedly connected to the outside of the sliding rod, a handle rod is slidably connected inside the collecting bucket, the handle rod passes through the collecting bucket, and a round rod is fixedly connected to one end of the handle rod close to the buoyancy block.

[0012] Furthermore, the recovery component includes an air outlet pipe fixedly connected to the outside of the outer shell, a rotating rod is rotatably connected inside the scraper ring, a short scraper rod is fixedly connected to the side of the rotating rod close to the scraper bar, a short rod is fixedly connected to the side of the rotating rod close to the air outlet pipe, a return spring is fixedly connected to the top of the short rod, and the end of the return spring away from the short rod is fixedly connected to the scraper ring.

[0013] Furthermore, a recovery pipe is fixedly connected to one side of the condensation plate close to the air outlet pipe, a condensation sheet is fixedly connected to the side of the recovery pipe away from the condensation plate, a branch pipe is fixedly connected to one end of the recovery pipe away from the condensation plate, the branch pipe is not connected to the recovery pipe, an inlet pipe is rotatably connected to one end of the branch pipe away from the recovery pipe, the branch pipe is connected to the inlet pipe, and the inlet pipe is fixedly connected to the liquid distribution pipe.

[0014] Furthermore, the protection component includes a bracket fixedly connected to the top of the liquid return pipe, the top of the bracket is rotatably connected with a thin shaft, the thin shaft is transmission-connected to the output shaft of the motor through a conveyor belt, the top of the shell is fixedly connected with a support plate, the end of the thin shaft away from the bracket is fixedly connected with a driving gear, the outer side of the support plate is rotatably connected with a connecting gear, the inner side of the support plate is rotatably connected with a driven shaft, the outer side of the driven shaft is fixedly connected with a driven gear, the end of the driven shaft away from the driven gear is fixedly connected with a transmission gear, the top of the air outlet pipe is fixedly connected with a slide rail, the inner side of the slide rail is slidably connected with a baffle, the top of the baffle is fixedly connected with a drop plate, the side of the drop plate close to the transmission gear is fixedly connected with a rack, and the rack meshes with the transmission gear.

[0015] Furthermore, a transmission blade is fixedly connected to one end of the driven shaft away from the transmission gear, a transmission bin is rotatably connected to the outer side of the driven shaft, a decomposition bin is fixedly connected to the side of the transmission bin close to the air intake pipe, the decomposition bin is fixedly connected to the outer shell, a liquid spray ring is fixedly connected to the bottom of the transmission bin, and the liquid spray ring is fixedly connected to the outer shell.

[0016] (III) Beneficial effects

[0017] The naphthalene-based phthalic anhydride precondenser device provided by the present invention has the following beneficial effects:

[0018] 1. The present invention uses a protective component. After the phthalic anhydride sensor detects phthalic anhydride, it drives the electric telescopic rod to contract, the electric telescopic rod drives the connecting gear to move, the motor drives the thin shaft to rotate, the baffle blocks the air outlet pipe, and the baffle also blocks the air inlet pipe, thereby achieving the effect of a sealing device, stopping the device from continuing to process the phthalic anhydride gas, fundamentally avoiding further leakage of the phthalic anhydride gas, and at the same time, the driven shaft drives the transmission blades to rotate, so that the decomposer is sprayed into the shell through the nozzle at the bottom of the liquid spray circle, and the decomposer decomposes the phthalic anhydride gas for harmless treatment, thereby achieving the effect of treating the leakage of phthalic anhydride gas, closing the phthalic anhydride gas inlet and outlet, and decomposing the phthalic anhydride gas to be inside the shell for harmless treatment, so that maintenance personnel can detect the leakage of the device with confidence, and avoid the leakage and spread of phthalic anhydride gas to endanger personal safety.

[0019] 2. The present invention uses a condensation component. The motor drives the active rod to rotate, so that the scraping ring and the scraping strip reciprocate up and down to scrape off the phthalic anhydride liquid inside the shell and on the surface of the condensation plate, so that it can be quickly collected. At the same time, the scraped surface of the condensation plate is clean, so that the phthalic anhydride gas can directly contact the surface of the condensation plate and be quickly converted into phthalic anhydride liquid, thereby achieving the effect of quickly collecting the phthalic anhydride liquid. When the phthalic anhydride gas is completely condensed and the device is closed, the scraping ring and the scraping strip can collect the phthalic anhydride liquid adhered to the inside of the shell and the surface of the condensation plate, and all the phthalic anhydride liquid in the device is collected and stored, avoiding part of the phthalic anhydride liquid in the closed device. As the temperature decreases, the phthalic anhydride liquid turns into white needle-shaped crystals at room temperature, which adhere to the inside of the device and are difficult to clean.

[0020] 3. The present invention uses a recovery component, and phthalic anhydride gas enters the air outlet pipe, driving the condensing sheet to rotate. The condensing sheet can convert the remaining phthalic anhydride gas into liquid. The condensing sheet rotates to throw the phthalic anhydride liquid into the air outlet pipe. Since a blocking ring is provided on the side of the air outlet pipe away from the branch pipe, the phthalic anhydride liquid flows back to the shell through the air outlet pipe. At the same time, the condensing sheet rotates, so that the condensing sheet can actively contact the phthalic anhydride gas and capture the phthalic anhydride therein, thereby increasing the conversion rate of phthalic anhydride and achieving the effect of increasing the collection amount of phthalic anhydride liquid. A small amount of phthalic anhydride liquid is converted again from the gas to be discharged, thereby reducing the waste of phthalic anhydride. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the shell structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the condensation component of the present invention;

[0024] Figure 4 This is a schematic diagram of the scraper structure of the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the collecting bucket structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the recycling component of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the protection component of the present invention;

[0028] Figure 8 It is a schematic cross-sectional view of the transmission compartment structure of the present invention.

[0029] The numbers in the figure represent:

[0030] 1. Support base;

[0031] 2. Condensation assembly; 21. Shell; 22. Collection bucket; 23. Motor; 24. Support frame; 25. Active rod; 26. Pull rod; 27. Lifting rod; 28. Scraping ring; 29. ​​Scraping strip; 210. Recovery bin; 211. Condensation plate; 212. Air inlet pipe; 213. Cooling device; 214. Liquid dispensing pipe; 215. Liquid return pipe; 216. Downstream liquid pipe; 217. Storage box;

[0032] 3. Lower liquid assembly; 31. Buoyancy block; 32. Sliding rod; 33. Round rod; 34. Bottom hole; 35. Rubber ring; 36. Handle bar; 37. Positioning block;

[0033] 4. Recovery assembly; 41. Exhaust pipe; 42. Rotating rod; 43. Short scraper rod; 44. Short rod; 45. Return spring; 46. Recovery pipe; 47. Condensation sheet; 48. Branch pipe; 49. Inlet pipe;

[0034] 5. Protection assembly; 51. Bracket; 52. Thin shaft; 53. Support plate; 54. Driving gear; 55. Connecting gear; 56. Driven shaft; 57. Driven gear; 58. Transmission gear; 59. Rack; 510. Drop plate; 511. Baffle; 512. Slide rail; 513. Transmission blade; 514. Transmission bin; 515. Decomposition bin; 516. Spray ring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] refer to Figures 1 to 8 A naphthalene-based phthalic anhydride precondenser device according to a preferred embodiment of the present invention will be described in detail below. A naphthalene-based phthalic anhydride precondenser device is used to precondense naphthalene-based phthalic anhydride.

[0037] A naphthalene-based phthalic anhydride precondenser device comprises a supporting base 1, a condensing assembly 2 for condensing phthalic anhydride gas is arranged on the top of the supporting base 1, a lower liquid assembly 3 for collecting liquid is arranged inside the condensing assembly 2, a recovery assembly 4 for condensing phthalic anhydride gas in tail gas is arranged inside the condensing assembly 2, and a protective assembly 5 for handling phthalic anhydride gas leakage is arranged on the top of the supporting base 1.

[0038] The condensing assembly 2 includes an outer shell 21 fixedly connected to the top of the supporting base 1, a collecting bucket 22 is fixedly connected to the bottom of the outer shell 21, and the collecting bucket 22 is funnel-shaped. A motor 23 is fixedly connected to the top of the supporting base 1, and the motor 23 is connected to an external power supply to control the rotation of its output shaft. A supporting frame 24 is fixedly connected to the rear of the outer shell 21, and an active rod 25 is rotatably connected inside the supporting frame 24. The bottom of the active rod 25 is fixedly connected to the output shaft of the motor 23, and the top of the active rod 25 is rotatably connected to a pull rod 26, and the top of the pull rod 26 is rotatably connected to a lifting rod 27, and a scraping ring 28 is fixedly connected to the bottom of the lifting rod 27. The scraping ring 28 is made of stainless steel, has a hard texture and is wear-resistant, and the scraping ring 28 is slidably connected to the inside of the outer shell 21, and a scraping strip 29 is fixedly connected inside the scraping ring 28. The scraping strip 29 is made of stainless steel, has a hard texture and is wear-resistant.

[0039] The top of the housing 21 is fixedly connected to a recovery bin 210, and the bottom of the recovery bin 210 is fixedly connected to a condensation plate 211. The condensation plate 211 is wide and long, has a large contact surface, and condensate flows inside. The condensation plate 211 is located inside the scraper 29. The outer side of the housing 21 is fixedly connected to an air inlet pipe 212, and the outer side of the support base 1 is fixedly connected to a cooling device 213. The cooling device 213 is connected to an external power supply. The cooling device 213 can cool the condensate. The cooling device 213 outputs the condensate from the liquid distribution pipe 214, and the condensate is output from the return pipe 21 To recover the condensate, a liquid separator 214 is fixedly connected to the bottom of the condensation plate 211, and twenty-five condensation plates 211 are fixedly connected to the top of the liquid separator 214. The twenty-five condensation plates 211 are arranged alternately in three and two in a horizontal manner. The liquid separator 214 is fixedly connected to the cooling device 213, and a liquid return pipe 215 is fixedly connected to the top of the cooling device 213. The liquid return pipe 215 is fixedly connected to the recovery bin 210. A liquid down pipe 216 is fixedly connected to the bottom of the collecting bucket 22, and a storage box 217 is fixedly connected to the bottom of the liquid down pipe 216.

[0040] The down liquid component 3 includes a bottom hole 34 opened inside the down liquid pipe 216, a positioning block 37 is fixedly connected inside the down liquid pipe 216, a slide rod 32 is slidably connected inside the positioning block 37, the diameter of the slide rod 32 is smaller than the diameter of the bottom hole 34, a buoyancy block 31 is fixedly connected to the top of the slide rod 32, the buoyancy block 31 is made of polymer plastic material, has strong buoyancy and is corrosion-resistant, a rubber ring 35 is fixedly connected to the outside of the slide rod 32, the rubber ring 35 is made of soft rubber material and has good sealing performance, a handle rod 36 is slidably connected inside the collecting bucket 22, the handle rod 36 passes through the collecting bucket 22, and a round rod 33 is fixedly connected to one end of the handle rod 36 close to the buoyancy block 31, and the round rod 33 is made of stainless steel, which is hard and wear-resistant.

[0041] The recovery component 4 includes an outlet pipe 41 fixedly connected to the outside of the outer shell 21, and a blocking ring is arranged inside the outlet pipe 41 on the side of the inlet pipe 49 away from the branch pipe 48 to prevent the outflow of phthalic anhydride liquid. A rotating rod 42 is rotatably connected inside the scraper ring 28, and a short scraper rod 43 is fixedly connected to the side of the rotating rod 42 close to the scraper bar 29, and a short rod 44 is fixedly connected to the side of the rotating rod 42 close to the outlet pipe 41, and a reset spring 45 is fixedly connected to the top of the short rod 44. The reset spring 45 is made of phosphor bronze, which has good elasticity and corrosion resistance. The end of the reset spring 45 away from the short rod 44 is fixedly connected to the scraper ring 28.

[0042] A recovery pipe 46 is fixedly connected to one side of the condensation plate 211 close to the air outlet pipe 41, and a condensation sheet 47 is fixedly connected to the side of the recovery pipe 46 away from the condensation plate 211. The condensation sheet 47 is inclined, and the condensation sheet 47 is wide and long with a large contact surface, and condensate flows inside. A branch pipe 48 is fixedly connected to one end of the recovery pipe 46 away from the condensation plate 211, and the branch pipe 48 is not connected to the recovery pipe 46. An end of the branch pipe 48 away from the recovery pipe 46 is rotatably connected to an inlet pipe 49, and the branch pipe 48 is connected to the inlet pipe 49, and the inlet pipe 49 is fixedly connected to the liquid distribution pipe 214.

[0043] The protection component 5 includes a bracket 51 fixedly connected to the top of the liquid return pipe 215, and a thin shaft 52 is rotatably connected to the top of the bracket 51. The thin shaft 52 is connected to the output shaft of the motor 23 through a conveyor belt. The thin shaft 52 is made of alloy steel and is hard and not easy to break. A support plate 53 is fixedly connected to the top of the shell 21, and an end of the thin shaft 52 away from the bracket 51 is fixedly connected to a driving gear 54. The outer side of the support plate 53 is rotatably connected to a connecting gear 55. The connecting gear 55 is provided with an electric telescopic rod near the support plate 53. A phthalic anhydride detection sensor is provided on the outer side of the shell 21. The sensor is connected to the electric telescopic rod. When the sensor After the device detects phthalic anhydride, it will drive the electric telescopic rod to retract. The support plate 53 is rotatably connected to the inside of the driven shaft 56, and the driven gear 57 is fixedly connected to the outside of the driven shaft 56. The end of the driven shaft 56 away from the driven gear 57 is fixedly connected to the transmission gear 58. The top of the air outlet pipe 41 is fixedly connected to a slide rail 512, and the inside of the slide rail 512 is slidably connected to a baffle 511. The top of the air inlet pipe 212 is provided with the same slide rail 512 and baffle 511. The top of the baffle 511 is fixedly connected to a drop plate 510, and the side of the drop plate 510 close to the transmission gear 58 is fixedly connected to a rack 59, and the rack 59 is meshed with the transmission gear 58.

[0044] A transmission blade 513 is fixedly connected to one end of the driven shaft 56 away from the transmission gear 58, and a transmission bin 514 is rotatably connected to the outer side of the driven shaft 56. A decomposition bin 515 is fixedly connected to the side of the transmission bin 514 close to the air intake pipe 212. Decomposition agent is stored in the decomposition bin 515, and the decomposition bin 515 is fixedly connected to the outer shell 21. A spray ring 516 is fixedly connected to the bottom of the transmission bin 514, a nozzle is provided at the bottom of the spray ring 516, and the spray ring 516 is fixedly connected to the outer shell 21.

[0045] The following is the entire working process and working principle of the above embodiment: the installer connects the air inlet pipe 212 to the phthalic anhydride gas production device, and connects the air outlet pipe 41 to the exhaust gas treatment device.

[0046] The user turns on the external power supply of the cooling device 213, the cooling device 213 cools the condensate, and outputs the condensate from the liquid separator 214. The condensate is dispersed from the liquid separator 214 into the twenty-five condensation plates 211, and the phthalic anhydride gas enters the shell 21 through the air inlet pipe 212. Since the twenty-five condensation plates 211 are arranged in a row of three, two, three, and two, the phthalic anhydride gas preferentially contacts the three condensation plates 211 close to the air inlet pipe 212, and part of the phthalic anhydride gas contacts the condensation plates 211. The condensate inside the condensation plates 211 absorbs the heat of the phthalic anhydride gas, and the condensate inside the condensation plates 211 rises to the inside of the recovery bin 210 and returns to the cooling device 213 through the liquid return pipe 215. After being cooled by the cooling device 213, it re-enters the liquid separator 214. The phthalic anhydride condenses from gas to liquid and adheres to the condensation plates 211, and flows along the condensation The plate 211 slides into the collecting hopper 22, and the phthalic anhydride gas passes through the gaps between the three condensation plates 211 near the air inlet pipe 212 and contacts the two condensation plates 211 near the air inlet pipe 212, so that part of the phthalic anhydride gas is converted into liquid and adheres to the condensation plates 211. When the phthalic anhydride gas passes through the outer shell 21 and enters the air outlet pipe 41, the gas contains only a small amount of phthalic anhydride. The three and two condensation plates 211 are arranged in a row alternately, so that the phthalic anhydride gas will be blocked by the next condensation plate 211 after passing through the condensation plate 211, so that the phthalic anhydride gas moves along an S-shaped path, so that the phthalic anhydride gas can be fully liquefied, and the shape of the condensation plate 211 is wide and long, and the contact surface is large, so as to achieve the effect of converting more phthalic anhydride gas. Compared with the traditional condenser, it is more unobstructed, can quickly process more phthalic anhydride gas, and allows the phthalic anhydride gas to move a longer distance inside the outer shell 21, thereby improving the conversion efficiency of the phthalic anhydride gas.

[0047] Further, the user turns on the external power supply of the motor 23, and the output shaft of the motor 23 drives the active rod 25 fixedly connected thereto to rotate. When the active rod 25 drives the pull rod 26 rotatably connected thereto to move downward, the pull rod 26 drives the lifting rod 27 rotatably connected thereto to move downward, and the lifting rod 27 drives the scraping ring 28 fixedly connected thereto to move downward. The scraping ring 28 scrapes off the phthalic anhydride liquid adhering to the inside of the outer shell 21, so that the phthalic anhydride liquid falls into the collecting bucket 22 and is collected. At the same time, the scraping ring 28 drives the scraping bar 29 fixedly connected thereto to move downward. The scraping bar 29 scrapes off the phthalic anhydride liquid adhering to the surface of the condensation plate 211, so that the phthalic anhydride liquid falls into the collecting bucket 22 and is collected. When the active rod 25 drives the pull rod 26 to move upward, the pull rod 26 drives the lifting rod 27 to move upward, and the lifting rod 27 drives the scraping ring 28 to move upward. The scraping ring 28 scrapes off the phthalic anhydride liquid adhering to the inside of the outer shell 21, so that the phthalic anhydride liquid falls into the collecting bucket 22 and is collected. The scraper ring 28 drives the scraper bar 29 to move upward, and the scraper bar 29 scrapes off the phthalic anhydride liquid adhering to the surface of the condensation plate 211, so that the phthalic anhydride liquid falls into the collecting bucket 22 and is collected. The output shaft of the motor 23 rotates to make the scraper ring 28 and the scraper bar 29 reciprocate up and down to scrape off the phthalic anhydride liquid inside the shell 21 and on the surface of the condensation plate 211, and quickly collect it. At the same time, the surface of the condensation plate 211 is scraped clean, so that the phthalic anhydride gas can directly contact the surface of the condensation plate 211 and quickly convert into phthalic anhydride liquid, thereby achieving the effect of quickly collecting the phthalic anhydride liquid. When the phthalic anhydride gas is completely condensed and the device is closed, the scraper ring 28 and the scraper bar 29 can collect the phthalic anhydride liquid adhering to the inside of the shell 21 and the surface of the condensation plate 211, and collect and store all the phthalic anhydride liquid inside the device, so as to avoid part of the phthalic anhydride liquid being inside the closed device. As the temperature decreases, the phthalic anhydride liquid turns into white needle-shaped crystals at room temperature, which adhere to the inside of the device and are difficult to clean.

[0048] Furthermore, when the phthalic anhydride liquid accumulates inside the collecting bucket 22 and causes the buoyancy block 31 to float up, the buoyancy block 31 will float up, driving the sliding rod 32 and the thin shaft 52 fixed thereto to move upward, and the rubber ring 35 will no longer block the bottom hole 34, so that the phthalic anhydride liquid inside the collecting bucket 22 enters the lower liquid pipe 216 through the gap between the sliding rod 32 and the bottom hole 34, and is stored in the storage box 217 through the lower liquid pipe 216. When the phthalic anhydride liquid cannot support the buoyancy block 31 to float up, the buoyancy block 31 moves downward due to the influence of gravity, driving the sliding rod 32 and the rubber ring 35 to move downward, and the rubber ring 35 blocks the bottom hole 34 again to prevent the phthalic anhydride liquid from continuing to fall, thereby isolating the collecting bucket 22 from the storage box 217, and only allowing the phthalic anhydride liquid to enter the storage box 217 through the lower liquid pipe 216. Since the phthalic anhydride gas is located above the phthalic anhydride liquid, it cannot pass over the phthalic anhydride liquid and enter the downcomer 216 from the bottom of the phthalic anhydride liquid. When the phthalic anhydride liquid cannot support the buoyancy block 31 to float up, the slide bar 32 will cut off the connection between the collecting bucket 22 and the downcomer 216. Therefore, the phthalic anhydride gas cannot enter the storage box 217 through the downcomer 216, thereby reducing the air flow inside the storage box 217 and reducing the volatilization of the phthalic anhydride liquid into gas. At the same time, the phthalic anhydride liquid inside the storage box 217 cannot evaporate into the collecting bucket 22, and it also avoids the situation where the unconverted phthalic anhydride gas directly enters the storage box 217 through the downcomer 216, causing a large amount of phthalic anhydride gas to enter the storage box 217. At the same time, when the user opens the storage box 217 to take out the phthalic anhydride liquid, a large amount of phthalic anhydride gas will not overflow to endanger the safety of the user.

[0049] Furthermore, when the scraper ring 28 moves downward to contact the recovery pipe 46, the short scraper rod 43 and the short rod 44 will be squeezed by the recovery pipe 46, so that the short scraper rod 43 drives the rotating rod 42 fixedly connected thereto to rotate, and at the same time, the short rod 44 drives the rotating rod 42 fixedly connected thereto to rotate, and the short rod 44 squeezes the reset spring 45 fixedly connected thereto, so that the reset spring 45 contracts and accumulates force. After the short scraper rod 43 and the short rod 44 pass through the recovery pipe 46, the reset spring 45 extends and pushes the short rod 44 to reset. The short rod 44 drives the rotating rod 42 to rotate so that the short scraper rod 43 is reset. When the phthalic anhydride gas enters the outlet pipe 41 through the outer shell 21, the phthalic anhydride gas drives the condensing sheet 47 to rotate due to the inclined setting of the condensing sheet 47 The condensate in the liquid separation tube 214 enters the branch tube 48 through the inlet tube 49, and enters the condensation sheet 47 through the branch tube 48, so that the condensation sheet 47 can convert the remaining phthalic anhydride gas into liquid. The condensation sheet 47 rotates to throw the phthalic anhydride liquid into the outlet pipe 41. Since a blocking ring is provided on the side of the inlet tube 49 away from the branch tube 48 inside the outlet pipe 41, the phthalic anhydride liquid flows back to the shell 21 through the outlet pipe 41. At the same time, the condensation sheet 47 rotates, so that the condensation sheet 47 can actively contact the phthalic anhydride gas and capture the phthalic anhydride therein, thereby increasing the conversion rate of phthalic anhydride and achieving the effect of increasing the collection amount of phthalic anhydride liquid, thereby converting a small amount of phthalic anhydride liquid in the discharged gas again and reducing the waste of phthalic anhydride.

[0050] Furthermore, an electric telescopic rod is arranged inside the connecting gear 55 near the support plate 53, and a phthalic anhydride detection sensor is arranged on the outer side of the housing 21. When the phthalic anhydride sensor detects phthalic anhydride, it will drive the electric telescopic rod to retract, and the electric telescopic rod drives the connecting gear 55 to move in the direction of the driving gear 54, so that the driving gear 54 is meshed with the connecting gear 55, and at the same time, the connecting gear 55 is meshed with the driven gear 57, and the output shaft of the motor 23 drives the thin shaft 52 to rotate through the conveyor belt, and the thin shaft 52 drives the driving gear 54 fixedly connected thereto to rotate, and the driving gear 54 drives the connecting gear 55 to rotate the driven gear 57, and the driven gear 57 drives the driven shaft 56 fixedly connected thereto to rotate, and the driven shaft 56 drives the transmission gear 58 fixedly connected thereto to rotate, and the transmission gear 58 is meshed with the rack 59, and the transmission gear 58 drives the rack 59 to move downward, and the rack 59 drives the lowering plate 510 fixedly connected thereto to move downward, and the lowering plate 510 drives the lowering plate 510 fixedly connected thereto to move downward. The baffle plate 511 connected moves downward, and the baffle plate 511 blocks the air outlet pipe 41. Since the same slide rail 512 and baffle plate 511 are set on the top of the air inlet pipe 212, the baffle plate 511 on the top of the air inlet pipe 212 also blocks the air inlet pipe 212, thereby achieving the effect of the sealing device, stopping the device from continuing to process the phthalic anhydride gas, and fundamentally avoiding the phthalic anhydride gas from continuing to leak. At the same time, the driven shaft 56 drives the transmission blade 513 fixedly connected thereto to rotate, and the transmission blade 513 extracts the decomposition agent inside the decomposition chamber 515, so that the decomposition agent enters the transmission chamber 514 and is input into the inside of the liquid spraying circle 516, and is sprayed into the inside of the shell 21 through the nozzle at the bottom of the liquid spraying circle 516, so that the decomposition agent decomposes the phthalic anhydride gas for harmless treatment, thereby achieving the effect of treating the leakage of phthalic anhydride gas, closing the phthalic anhydride gas inlet and outlet, and decomposing the phthalic anhydride gas entering the shell 21 for harmless treatment, so that it is convenient for maintenance personnel to detect the leakage of the device with confidence, and avoiding the spread of phthalic anhydride gas leakage and endangering personal safety.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A naphthalene-based phthalic anhydride precondenser device, used for condensing phthalic anhydride gas and avoiding the hazard of its leakage, said naphthalene-based phthalic anhydride precondenser device comprising a supporting base (1), characterized in that: A condensation assembly (2) for condensing phthalic anhydride gas is arranged on the top of the support base (1), a lower liquid assembly (3) for collecting liquid is arranged inside the condensation assembly (2), a recovery assembly (4) for condensing phthalic anhydride gas in tail gas is arranged inside the condensation assembly (2), and a protection assembly (5) for handling phthalic anhydride gas leakage is arranged on the top of the support base (1).

2. A naphthalene-based phthalic anhydride precondenser device according to claim 1, characterized in that: The condensation assembly (2) comprises a shell (21) fixedly connected to the top of a support base (1), a collecting bucket (22) fixedly connected to the bottom of the shell (21), a motor (23) fixedly connected to the top of the support base (1), a support frame (24) fixedly connected to the rear of the shell (21), an active rod (25) rotatably connected inside the support frame (24), the bottom of the active rod (25) is fixedly connected to the output shaft of the motor (23), the top of the active rod (25) is rotatably connected to a pull rod (26), the top of the pull rod (26) is rotatably connected to a lifting rod (27), the bottom of the lifting rod (27) is fixedly connected to a scraping ring (28), the scraping ring (28) is slidably connected to the inside of the shell (21), and a scraping strip (29) is fixedly connected inside the scraping ring (28).

3. A naphthalene-based phthalic anhydride precondenser device according to claim 2, characterized in that: The top of the shell (21) is fixedly connected to a recovery bin (210), the bottom of the recovery bin (210) is fixedly connected to a condensation plate (211), the condensation plate (211) is located inside the scraper (29), the outer side of the shell (21) is fixedly connected to an air intake pipe (212), the outer side of the support base (1) is fixedly connected to a cooling device (213), the bottom of the condensation plate (211) is fixedly connected to a liquid separation pipe (214), the liquid separation pipe (214) is fixedly connected to the cooling device (213), the top of the cooling device (213) is fixedly connected to a liquid return pipe (215), the liquid return pipe (215) is fixedly connected to the recovery bin (210), the bottom of the collecting bucket (22) is fixedly connected to a liquid down pipe (216), the bottom of the liquid down pipe (216) is fixedly connected to a storage box (217).

4. A naphthalene-based phthalic anhydride precondenser device according to claim 2, characterized in that: The lower liquid component (3) comprises a bottom hole (34) opened inside the lower liquid pipe (216), a positioning block (37) is fixedly connected inside the lower liquid pipe (216), a sliding rod (32) is slidably connected inside the positioning block (37), the diameter of the sliding rod (32) is smaller than the diameter of the bottom hole (34), a buoyancy block (31) is fixedly connected to the top of the sliding rod (32), a rubber ring (35) is fixedly connected to the outside of the sliding rod (32), a handle rod (36) is slidably connected inside the collecting bucket (22), the handle rod (36) passes through the collecting bucket (22), and a round rod (33) is fixedly connected to one end of the handle rod (36) close to the buoyancy block (31).

5. A naphthalene-based phthalic anhydride precondenser device according to claim 2, characterized in that: The recovery component (4) comprises an air outlet pipe (41) fixedly connected to the outside of the housing (21); a rotating rod (42) is rotatably connected inside the scraper ring (28); a short scraper rod (43) is fixedly connected to the side of the rotating rod (42) close to the scraper strip (29); a short rod (44) is fixedly connected to the side of the rotating rod (42) close to the air outlet pipe (41); a return spring (45) is fixedly connected to the top of the short rod (44); and an end of the return spring (45) away from the short rod (44) is fixedly connected to the scraper ring (28).

6. A naphthalene-based phthalic anhydride precondenser device according to claim 3, characterized in that: A recovery pipe (46) is fixedly connected to one side of the condensation plate (211) close to the air outlet pipe (41), a condensation sheet (47) is fixedly connected to one side of the recovery pipe (46) away from the condensation plate (211), a branch pipe (48) is fixedly connected to one end of the recovery pipe (46) away from the condensation plate (211), the branch pipe (48) is not connected to the recovery pipe (46), and an inlet pipe (49) is rotatably connected to one end of the branch pipe (48) away from the recovery pipe (46), the branch pipe (48) is connected to the inlet pipe (49), and the inlet pipe (49) is fixedly connected to the liquid distribution pipe (214).

7. A naphthalene-based phthalic anhydride precondenser device according to claim 5, characterized in that: The protection component (5) comprises a bracket (51) fixedly connected to the top of the liquid return pipe (215); a thin shaft (52) is rotatably connected to the top of the bracket (51); the thin shaft (52) is transmission-connected to the output shaft of the motor (23) through a conveyor belt; a support plate (53) is fixedly connected to the top of the housing (21); an end of the thin shaft (52) away from the bracket (51) is fixedly connected to a driving gear (54); a connecting gear (55) is rotatably connected to the outside of the support plate (53); and a driven shaft (56) is rotatably connected to the inside of the support plate (53). ), a driven gear (57) is fixedly connected to the outside of the driven shaft (56), a transmission gear (58) is fixedly connected to one end of the driven shaft (56) away from the driven gear (57), a slide rail (512) is fixedly connected to the top of the air outlet pipe (41), a baffle (511) is slidably connected to the inside of the slide rail (512), a drop plate (510) is fixedly connected to the top of the baffle (511), a rack (59) is fixedly connected to the side of the drop plate (510) close to the transmission gear (58), and the rack (59) is meshed with the transmission gear (58).

8. A naphthalene-based phthalic anhydride precondenser device according to claim 7, characterized in that: The end of the driven shaft (56) away from the transmission gear (58) is fixedly connected to a transmission blade (513); the outer side of the driven shaft (56) is rotatably connected to a transmission chamber (514); the side of the transmission chamber (514) close to the air intake pipe (212) is fixedly connected to a decomposition chamber (515); the decomposition chamber (515) is fixedly connected to the outer shell (21); the bottom of the transmission chamber (514) is fixedly connected to a liquid spraying ring (516); and the liquid spraying ring (516) is fixedly connected to the outer shell (21).

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