An isobutylene recovery device and method in the reaction process of tert-butyl acrylate

Abstract

The invention relates to the technical field of isobutylene recovery and discloses an isobutylene recovery device and method for a tert-butyl acrylate reaction process. The device and method are used for separating and recovering isobutylene generated in the tert-butyl acrylate reaction process. The device comprises a recovery tank for recovering gaseous isobutylene. The top of the isobutylene tank is fixedly connected to a separation tank. The top of the separation tank is fixedly connected to a feed pipe for docking with a flash tank. The right side of the recovery tank is fixedly connected to an exhaust pipe. In the invention, the gaseous isobutylene is obstructed by a porous baffle, thereby improving compression efficiency. The porous baffle can adsorb liquid isobutylene, making it easier for isobutylene to aggregate. The swirl plate contacts the isobutylene, causing the isobutylene to generate a swirl, which further aggregates the isobutylene, thereby further promoting the compression efficiency of the isobutylene.

Description

Technical Field

[0001] The invention relates to the technical field of isobutylene recovery, and in particular to an isobutylene recovery device and method in a tert-butyl acrylate reaction process. Background Art

[0002] In the production process of tert-butyl acrylate, isobutylene is a key raw material or by-product, and its recycling is crucial to the process economy and environmental protection. In traditional processes, unreacted isobutylene is usually recovered by absorption, compression condensation or distillation, but there are problems such as high energy consumption, low recovery rate or insufficient purity.

[0003] Patent No. CN209500833U discloses an isobutylene recovery device, which includes a flash tank and a recovery tank. The recovery tank body is a double-layer structure, and the interlayer of the double-layer structure is in a vacuum state. The recovery tank body is provided with four connecting pipes, namely, a feed pipe, an exhaust pipe, a pressure pipe and a discharge pipe. The connecting pipe is a double-layer structure. The feed pipe, the exhaust pipe, the pressure pipe and the discharge pipe are all equipped with a one-way valve. The feed pipe is connected to the steam outlet of the flash tank, the exhaust pipe is connected to the vacuum equipment, and the pressure pipe is connected to the discharge pipe. A pipe is connected to a gas compressor, which introduces inert gas into the recovery tank. A pressure gauge is provided on the tank body of the recovery tank. The boiling points of isobutylene and tert-butyl acetate differ greatly. The low-boiling-point isobutylene is quickly converted into gas through a flash tank and then enters the recovery tank for liquefaction and storage, making subsequent reaction operations more stable. The recovered isobutylene can continue to be used for other purposes or returned to the original reaction, thereby improving resource utilization. However, the above device still has the problem of insufficient compression efficiency when isobutylene is recovered after it is generated by the reaction of tert-butyl acrylate in the flash tank. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an isobutylene recovery device and method in the reaction process of tert-butyl acrylate in view of the above-mentioned deficiencies in the prior art.

[0005] To solve the above technical problems, the present invention adopts a technical solution: an isobutylene recovery device in the process of tert-butyl acrylate reaction, which is used to separate and recover isobutylene generated in the process of tert-butyl acrylate reaction, comprising:

[0006] A recovery tank is used to recover gaseous isobutylene. The top of the isobutylene tank is fixedly connected to a separation tank. The top of the separation tank is fixedly connected to a feed pipe. The feed pipe is used to connect to a flash tank. The right side of the recovery tank is fixedly connected to an exhaust pipe. The exhaust pipe is used to connect to a vacuum pump to extract air from the recovery tank and put the recovery tank into a vacuum state. The right side of the recovery tank is fixedly connected to a pressurizing pipe for connecting to a compressor, thereby compressing the isobutylene in the recovery tank into liquid.

[0007] An excess liquid recovery device, the excess liquid recovery device is arranged on the top of the recovery tank, and the excess liquid recovery device is used to separate the residual water in the isobutylene;

[0008] An anti-polymerization device is provided on the top of the recovery tank and is used to prevent isobutylene from polymerizing during the compression process.

[0009] As a further technical solution, the recovery tank includes:

[0010] a main shaft, the main shaft being rotatably connected to the inner wall of the bottom end;

[0011] A porous baffle, fixedly connected to the inner wall of the recovery tank, is used to increase the resistance during compression of isobutylene and improve the compression efficiency. The porous baffle is used to adsorb liquid isobutylene and improve the isobutylene aggregation efficiency. The porous baffle is provided with a plurality of through holes for adsorbing liquefied isobutylene and allowing the isobutylene to flow downward through the through holes.

[0012] A discharge pipe is fixedly connected to the bottom surface of the recovery tank.

[0013] As a further technical solution, the recovery tank further comprises:

[0014] A limiting half ring, the limiting half ring being fixedly connected to a side of the porous baffle close to the main shaft;

[0015] The swirl plate is fixedly connected to the circumferential surface of the main shaft, the lower surface of the swirl plate is fixedly connected to an extension rod, the bottom end of the extension rod is fixedly connected to a connecting plate, and the lower surface of the connecting plate is fixedly connected to a scraper plastic. The scraper plastic is used to scrape off the liquid isobutylene adhering to the upper surface of the porous baffle, thereby improving the efficiency of the liquid isobutylene gathering at the bottom of the recovery tank and facilitating liquid discharge.

[0016] As a further technical solution, the main shaft and the inner wall of the limiting semi-ring are rotatably connected, the wiper plastic and the upper surface of the porous baffle are abutted, the main shaft and the side surface of the porous baffle are rotatably connected, the bottom end of the main shaft is fixedly connected to a motor, and the motor and the lower surface of the recovery tank are fixedly connected.

[0017] As a further technical solution, the excess liquid recovery device includes:

[0018] A water absorption screen is fixedly connected to the inner wall of the separation tank. The inner side of the water absorption screen is provided with honeycomb-shaped through holes for absorbing residual water that flows from the flash tank into the recovery tank along with the isobutylene. The inner wall of the water absorption screen is fixedly connected to a solid column.

[0019] The slide rail is fixedly connected to the inner wall of the recovery tank. The inner wall of the slide rail is rotatably connected to a ring plate. The inner wall of the ring plate is fixedly connected to a water storage bucket. The water storage bucket is used to collect water dripping from the water absorption screen.

[0020] As a further technical solution, the excess liquid recovery device further comprises:

[0021] An air delivery pipe is fixedly connected to the inner wall of the bottom end of the water storage hopper. The air delivery pipe is used to transfer gaseous isobutylene above the water storage hopper to the bottom of the water storage hopper. The top end of the air delivery pipe is fixedly connected to an air suction disk. The conical surface of the air suction disk is provided with an air inlet groove. When water droplets in the water suction screen fall into the water storage hopper and gather, the gaseous isobutylene is affected by pressure and gathers near the air suction disk and flows into the air suction disk and the air delivery pipe through the air inlet groove and finally flows to the bottom of the water storage hopper through the air delivery pipe.

[0022] A U-shaped connecting rod is fixedly connected to the top end of the main shaft.

[0023] As a further technical solution, the air suction plate and the lower surface of the water suction screen are rotatably connected, and the top end of the U-shaped connecting rod and the bottom end of the water storage bucket are fixedly connected.

[0024] As a further technical solution, the anti-aggregation device includes:

[0025] A drug inlet pipe, which is fixedly connected to the inner wall of the top of the recovery tank and is used to input the polymerization inhibitor into the recovery tank;

[0026] A connecting pipe is fixedly connected to the outer conical surface of the water storage bucket, and a nozzle is arranged below the connecting pipe.

[0027] As a further technical solution, the anti-aggregation device further comprises:

[0028] An annular spraying trough, which is fixedly connected to the bottom end of the connecting pipe and is used to increase the spraying range of the polymerization inhibitor;

[0029] A limit clamping plate, the limit clamping plate is fixedly connected to the circumferential surface of the annular medicine spraying trough;

[0030] A guide rail, wherein the guide rail is fixedly connected to the inner wall of the recovery tank;

[0031] An inner sleeve is fixedly connected to the inner conical surface of the water storage bucket.

[0032] As a further technical solution, the nozzle is fixedly connected to the lower surface of the annular spraying trough, the limiting clamp is rotatably connected to the inner wall of the guide rail, and the inner sleeve is rotatably connected to the top surface of the inner wall of the recovery tank.

[0033] A method for recovering isobutylene in a tert-butyl acrylate reaction process using an isobutylene recovery device, comprising the following steps:

[0034] Step 1: First, the recovery tank is evacuated by a vacuum pump and an exhaust pipe to generate negative pressure in the recovery tank and absorb the isobutylene. The flashed isobutylene is attracted by the suction force through the feed pipe and flows into the separation tank;

[0035] Step 2: The isobutylene in the separation tank then flows into the recovery tank, where it is compressed into liquid by a compressor and a pressure pipe and stored at the bottom of the recovery tank.

[0036] Step 3: Subsequently, a polymerization inhibitor is added to the recovery tank through the drug inlet pipe and mixed with the isobutylene to prevent the isobutylene from polymerizing during the liquefaction process;

[0037] Step 4: Finally, when the liquefied isobutylene needs to be subsequently processed, the discharge pipe is opened and connected to the subsequent processing device to complete the discharge.

[0038] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0039] 1. In the isobutylene recovery device during the reaction of tert-butyl acrylate, the gaseous isobutylene is hindered by the porous baffle, and its flow rate slows down, causing the gas to gather more, thereby improving the compression efficiency. The porous baffle absorbs the isobutylene that has been compressed into a liquid state through the adsorption property of the metal surface, facilitating the aggregation of the isobutylene. When the swirl plate rotates, it stirs the gaseous isobutylene, causing the isobutylene to swirl and further gather, further promoting the compression efficiency of the isobutylene. When the scraper plastic rotates in a circular motion, it scrapes the liquid isobutylene gathered on the surface of the porous baffle to the bottom of the recovery tank. By performing multiple aggregation of isobutylene in both gaseous and liquid states, the compression efficiency of the isobutylene is ultimately improved.

[0040] 2. In the isobutylene recovery device during the tert-butyl acrylate reaction process, isobutylene flows into the top of the water storage bucket through the through-holes opened on the water absorption screen, and the non-isobutylene water contained in the isobutylene is adsorbed by the inner wall of the through-hole and slides from the through-hole to the bottom of the water storage bucket, so that the isobutylene and the residual water after flash evaporation are separated, and the isobutylene is prevented from mixing with other components of the water during the compression of the isobutylene into liquid, which is not conducive to subsequent recycling. The air pipe and the air suction disk block the residual water, preventing components other than isobutylene from entering the recovery tank. The U-shaped connecting rod drives the water storage bucket to rotate. The rotation of the water storage bucket generates centrifugal force, which causes the water falling on its inner conical surface to quickly gather at the bottom, preventing the liquid from re-mixing with the isobutylene and affecting the purity of the isobutylene recovery.

[0041] 3. In the isobutylene recovery device during the reaction of tert-butyl acrylate, the polymerization inhibitor in the annular spraying trough is sprayed into the recovery tank through the nozzle to react with isobutylene, thereby preventing the polymerization of isobutylene from producing polymers and affecting the recovery effect. When the polymerization inhibitor falls on the water storage bucket, it is blocked by the inner sleeve to prevent it from mixing with the water separated from the isobutylene. The annular spraying trough generates centrifugal force when rotating, causing the internal polymerization inhibitor to shake evenly, thereby allowing the polymerization inhibitor to be more evenly sprayed into the recovery tank to fully react with the isobutylene, thereby improving the polymerization inhibition effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0043] Figure 2 This is a schematic diagram of the front side three-dimensional half-section structure of the present invention;

[0044] Figure 3 This is a schematic diagram of a half-section structure of the front side of the recovery tank of the present invention;

[0045] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of A in the middle;

[0046] Figure 5 It is a schematic diagram of a front side three-dimensional half-section structure of the excess liquid recovery device of the present invention;

[0047] Figure 6 It is a schematic diagram of the side and bottom three-dimensional half-section structure of the anti-aggregation device of the present invention;

[0048] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of B.

[0049] In the figure: 1. Recovery tank; 2. Separation tank; 3. Feed pipe; 4. Exhaust pipe; 5. Pressurizing pipe; 6. Main shaft; 7. Multi-porous baffle; 8. Excess liquid recovery device; 9. Anti-polymerization device; 10. Discharge pipe; 11. Limiting half ring; 12. Swirl plate; 13. Extension rod; 14. Connecting plate; 15. Plastic scraper; 81. Water absorption screen; 82. Solid column; 83. Slide rail; 84. Annular plate; 85. Water storage bucket; 86. Air supply pipe; 87. Suction disc; 88. Air inlet trough; 89. U-shaped connecting rod; 91. Drug feed pipe; 92. Connecting pipe; 93. Sprinkler; 94. Annular drug spraying trough; 95. Limiting card plate; 96. Guide rail; 97. Inner sleeve. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0051] See also Figure 1-Figure 7One embodiment of the present invention is: an isobutylene recovery device in the process of tert-butyl acrylate reaction, which is used to separate and recover isobutylene generated in the process of tert-butyl acrylate reaction, including a recovery tank 1, the recovery tank 1 is used to recover gaseous isobutylene, the top of the isobutylene is fixedly connected to a separation tank 2, the top of the separation tank 2 is fixedly connected to a feed pipe 3, the feed pipe 3 is used to connect with a flash tank, the right side of the recovery tank 1 is fixedly connected to an exhaust pipe 4, the exhaust pipe 4 is used to connect with a vacuum pump to extract air in the recovery tank 1 so that the recovery tank 1 is in a vacuum state, the right side of the recovery tank 1 is fixedly connected to a pressurizing pipe 5 for connecting with a compressor, so as to remove the isobutylene in the recovery tank 1. The isobutylene is compressed into liquid, and the excess liquid recovery device 8 is arranged on the top of the recovery tank 1. The excess liquid recovery device 8 is used to separate the residual water in the isobutylene. The anti-polymerization device 9 is arranged on the top of the recovery tank 1. The anti-polymerization device 9 is used to prevent isobutylene from polymerizing during the compression process. The gaseous isobutylene is hindered by the porous baffle 7, which improves the compression efficiency. The porous baffle 7 can adsorb liquid isobutylene, which is more convenient for isobutylene to aggregate. The swirl plate 12 contacts the isobutylene, causing the isobutylene to generate a swirl and further aggregate, thereby further promoting the compression efficiency of the isobutylene. The recovery tank 1 includes a main shaft 6, which is rotatably connected to the inner wall of the bottom end, and the porous baffle 7 is fixedly connected to the recovery tank 1. The inner wall, the porous baffle 7 is used to increase the resistance during compression of isobutylene and improve the compression efficiency. The porous baffle 7 is used to adsorb liquid isobutylene to improve the isobutylene aggregation efficiency, and a plurality of through holes are provided on the porous baffle 7 for adsorbing liquefied isobutylene and allowing the isobutylene to flow downward through the through holes. The discharge pipe 10 is fixedly connected to the bottom surface of the recovery tank 1. The recovery tank 1 also includes a limiting semi-ring 11, which is fixedly connected to the side of the porous baffle 7 close to the main shaft 6. The swirl plate 12 is fixedly connected to the circumferential surface of the main shaft 6. The lower surface of the swirl plate 12 is fixedly connected to an extension rod 13, the bottom end of the extension rod 13 is fixedly connected to a connecting plate 14, and the lower surface of the connecting plate 14 is fixedly connected to The scraper plastic 15 is used to scrape off the liquid isobutylene adhering to the upper surface of the porous baffle 7, thereby improving the efficiency of the liquid isobutylene gathering at the bottom of the recovery tank 1 and facilitating the discharge of the liquid. The main shaft 6 and the inner wall of the limiting semi-ring 11 are rotatably connected, the scraper plastic 15 abuts against the upper surface of the porous baffle 7, the main shaft 6 and the side surface of the porous baffle 7 are rotatably connected, the bottom end of the main shaft 6 is fixedly connected to a motor, and the motor is fixedly connected to the lower surface of the recovery tank 1. When the scraper plastic 15 rotates in a circle, it contacts the upper surface of the porous baffle 7, thereby scraping down the liquid isobutylene gathered on the upper surface of the porous baffle 7, further improving the efficiency of the liquid isobutylene gathering at the bottom of the recovery tank 1.

[0052] Working principle: The recovery tank 1 is evacuated by a vacuum pump and an exhaust pipe 4, so that a negative pressure is generated in the recovery tank 1 to absorb the isobutylene. The flashed isobutylene is guided by suction through the feed pipe 3 to flow into the separation tank 2, and then flows into the recovery tank 1 through the separation tank 2. At this time, the isobutylene in the recovery tank 1 is compressed into liquid by the compressor and the pressure pipe 5 and accumulated at the bottom of the recovery tank 1. The liquid isobutylene can be discharged from the recovery tank 1 by opening the discharge pipe 10. In the process of isobutylene flowing to the bottom of the recovery tank 1, it contacts the porous baffle 7. The gaseous isobutylene is hindered by the porous baffle 7, which improves the compression efficiency. The porous baffle 7 can adsorb the liquid isobutylene, which is more convenient for the isobutylene to gather. The integrated liquid isobutylene flows downward through the through hole to the recovery tank 1 for convergence and liquefaction recovery. The motor is started, and the motor drives the main shaft 6 to rotate in the limiting semi-ring 11. The main shaft 6 drives the swirl plate 12 to rotate. The swirl plate 12 contacts the isobutylene, causing the isobutylene to produce a swirl and further gather, thereby further promoting the compression efficiency of the isobutylene. When the swirl plate 12 rotates, it drives the extension rod 13 to rotate in a circle. The extension rod 13 drives the connecting plate 14 to rotate in a circle. The connecting plate 14 drives the wiper plastic 15 to rotate in a circle. When the wiper plastic 15 rotates in a circle, it contacts the upper surface of the porous baffle 7, thereby scraping the liquid isobutylene gathered on the upper surface of the porous baffle 7 downward, further improving the efficiency of the liquid isobutylene gathering at the bottom of the recovery tank 1.

[0053] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, the excess liquid recovery device 8 includes a water absorption screen 81, which is fixedly connected to the inner wall of the separation tank 2. The inner side of the water absorption screen 81 is provided with honeycomb-shaped through holes for absorbing the residual water flowing into the recovery tank 1 along with the isobutylene from the flash tank. The inner wall of the water absorption screen 81 is fixedly connected to a solid column 82, and a slide rail 83 is fixedly connected to the inner wall of the recovery tank 1. The inner wall of the slide rail 83 is rotatably connected to an annular plate 84, and the inner wall of the annular plate 84 is fixedly connected to a storage tank. The water bucket 85 is used to collect water dripping from the water absorption screen 81. Isobutylene flows into the water storage bucket 85 in the recovery tank 1 through the through hole opened on the water absorption screen 81, while the residual water is absorbed and collected by the inner wall of the through hole and slides from the through hole to the bottom of the water storage bucket 85, thereby improving the separation effect of isobutylene and preventing the isobutylene from mixing with other components of water during the process of being compressed into liquid, which is not conducive to subsequent recycling. The excess liquid recovery device 8 also includes an air pipe 86, which is fixedly connected to the storage tank 1. The inner wall of the bottom end of the water bucket 85 is provided with an air pipe 86 for transferring the gaseous isobutylene above the water bucket 85 to the bottom of the water bucket 85. The top of the air pipe 86 is fixedly connected to an air suction disc 87. The conical surface of the air suction disc 87 is provided with an air inlet groove 88. When the water droplets in the water suction screen 81 fall into the water bucket 85 and gather, the gaseous isobutylene is affected by the pressure and gathers near the air suction disc 87 and flows into the air suction disc 87 and the air pipe 86 through the air inlet groove 88 and finally flows to the bottom of the water bucket 85 through the air pipe 86. The U-shaped connecting rod 89 is fixed to the bottom of the water bucket 85. It is fixedly connected to the top of the main shaft 6, the air suction disk 87 and the lower surface of the water suction screen 81 are rotatably connected, the top of the U-shaped connecting rod 89 is fixedly connected to the bottom of the water storage bucket 85, the air supply pipe 86 and the air suction disk 87 block the residual water, and prevent the components other than isobutylene from entering the recovery tank 1. The U-shaped connecting rod 89 drives the water storage bucket 85 and the annular plate 84 to rotate in the slide rail 83. The rotation of the water storage bucket 85 generates centrifugal force to quickly gather the water falling on its inner conical surface to the bottom, preventing the liquid from re-mixing with isobutylene and affecting the purity of isobutylene recovery.

[0054] Working principle: After the flash evaporation of isobutylene and the residual water mixed therein enter the separation tank 2 and contact with the water absorption screen 81. The isobutylene flows into the water storage bucket 85 in the recovery tank 1 through the through hole opened on the water absorption screen 81, while the residual water is absorbed and collected by the inner wall of the through hole and slides from the through hole to the bottom of the water storage bucket 85, which improves the separation effect of isobutylene and prevents it from mixing with other components of water during the process of being compressed into liquid, which is not conducive to subsequent recycling. The gaseous isobutylene gathers near the suction disk 87. The air flows from the air inlet groove 88 into the air suction disc 87 and the air delivery pipe 86, and finally flows to the bottom of the water storage bucket 85 through the air delivery pipe 86. The air delivery pipe 86 and the air suction disc 87 block the residual water, preventing the components other than isobutylene from entering the recovery tank 1. The rotation of the main shaft 6 drives the U-shaped connecting rod 89 to rotate, and the U-shaped connecting rod 89 drives the water storage bucket 85 and the annular plate 84 to rotate in the slide rail 83. The rotation of the water storage bucket 85 generates centrifugal force to quickly gather the water falling on its inner conical surface to the bottom, preventing the liquid from re-mixing with isobutylene and affecting the purity of isobutylene recovery.

[0055] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, the anti-polymerization device 9 includes a drug feed pipe 91, which is fixedly connected to the inner wall of the top of the recovery tank 1. The drug feed pipe 91 is used to input the polymerization inhibitor into the recovery tank 1. The connecting pipe 92 is fixedly connected to the outer conical surface of the water storage bucket 85. A nozzle 93 is provided below the connecting pipe 92. The polymerization inhibitor in the annular spraying trough 94 is then sprayed into the recovery tank 1 through the nozzle 93 to react with isobutylene to prevent isobutylene from polymerizing and producing polymers, which affects the recovery efficiency. When the polymerization inhibitor falls on the water storage bucket 85, it is prevented from mixing with water by the inner sleeve 97 combination. The anti-polymerization device 9 also includes an annular spraying trough 94. 94 is fixedly connected to the bottom end of the connecting pipe 92, the annular medicine sprinkling trough 94 is used to increase the spraying range of the inhibitor, the limiting card 95 is fixedly connected to the circumferential surface of the annular medicine sprinkling trough 94, the guide rail 96 is fixedly connected to the inner wall of the recovery tank 1, the inner sleeve 97 is fixedly connected to the inner conical surface of the water storage bucket 85, the nozzle 93 is fixedly connected to the lower surface of the annular medicine sprinkling trough 94, the limiting card 95 and the inner wall of the guide rail 96 are rotatably connected, the inner sleeve 97 and the top surface of the inner wall of the recovery tank 1 are rotatably connected, the annular medicine sprinkling trough 94 generates centrifugal force when rotating, thereby causing the internal inhibitor to shake evenly, so that the inhibitor can be evenly sprinkled into the recovery tank 1 and fully react with isobutylene, thereby improving the inhibitor effect.

[0056] Working principle: The polymerization inhibitor is added into the recovery tank 1 through the medicine inlet pipe 91, and the polymerization inhibitor falls onto the water storage bucket 85 and then falls into the annular medicine sprinkling trough 94 through the connecting pipe 92. The polymerization inhibitor in the annular medicine sprinkling trough 94 is then sprinkled into the recovery tank 1 through the nozzle 93 to react with isobutylene to prevent isobutylene from polymerizing to produce polymers, which affects the recovery efficiency. When the polymerization inhibitor falls onto the water storage bucket 85, it is combined with the inner sleeve 97 to prevent it from mixing with water. When the water storage bucket 85 rotates, it drives the connecting pipe 92 to rotate in a circle, and the connecting pipe 92 drives the annular medicine sprinkling trough 94 to rotate. The annular medicine sprinkling trough 94 rotates in the guide rail 96 through the limiting card plate 95 to maintain balance. The annular medicine sprinkling trough 94 generates centrifugal force during rotation, thereby causing the internal polymerization inhibitor to shake evenly, so that the polymerization inhibitor can be evenly sprinkled into the recovery tank 1 and fully react with isobutylene, thereby improving the polymerization inhibition effect.

[0057] The present invention provides an isobutylene recovery device for the reaction of tert-butyl acrylate. There are numerous methods and approaches for implementing this technical solution. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. An isobutylene recovery device in the reaction process of tert-butyl acrylate, characterized in that: include: A recovery tank (1), the recovery tank (1) is used to recover gaseous isobutylene, the top of the isobutylene is fixedly connected to a separation tank (2), the top of the separation tank (2) is fixedly connected to a feed pipe (3), the feed pipe (3) is used to connect with a flash tank, the right side of the recovery tank (1) is fixedly connected to an exhaust pipe (4), the exhaust pipe (4) is used to connect with a vacuum pump to extract air in the recovery tank (1) so that the recovery tank (1) is in a vacuum state, and the right side of the recovery tank (1) is fixedly connected to a pressurizing pipe (5) for connecting with a compressor, thereby compressing the isobutylene in the recovery tank (1) into liquid; An excess liquid recovery device (8), the excess liquid recovery device (8) being arranged on the top of the recovery tank (1), and the excess liquid recovery device (8) being used to separate residual water in the isobutylene; an anti-polymerization device (9), the anti-polymerization device (9) being arranged on the top of the recovery tank (1), and the anti-polymerization device (9) being used to prevent isobutylene from polymerizing during the compression process; The recovery tank (1) comprises: A main shaft (6), the main shaft (6) being rotatably connected to the inner wall of the bottom end; A porous baffle (7), the porous baffle (7) being fixedly connected to the inner wall of the recovery tank (1), the porous baffle (7) being used to enhance the resistance during compression of isobutylene and improve the compression efficiency, the porous baffle (7) being used to adsorb liquid isobutylene and improve the isobutylene aggregation efficiency, and the porous baffle (7) being provided with a plurality of through holes for adsorbing liquefied isobutylene and allowing the isobutylene to flow downward through the through holes; A discharge pipe (10), wherein the discharge pipe (10) is fixedly connected to the bottom surface of the recovery tank (1); The excess liquid recovery device (8) comprises: A water absorption screen (81), the water absorption screen (81) is fixedly connected to the inner wall of the separation tank (2), the inner side of the water absorption screen (81) is provided with honeycomb-shaped through holes for absorbing residual water flowing into the recovery tank (1) along with isobutylene from the flash tank, and the inner wall of the water absorption screen (81) is fixedly connected to a solid column (82); A slide rail (83), the slide rail (83) is fixedly connected to the inner wall of the recovery tank (1), the inner wall of the slide rail (83) is rotatably connected to an annular plate (84), the inner wall of the annular plate (84) is fixedly connected to a water storage bucket (85), and the water storage bucket (85) is used to collect water dripping from the water absorption screen (81); The anti-polymerization device (9) comprises: A drug inlet pipe (91), the drug inlet pipe (91) is fixedly connected to the inner wall of the top end of the recovery tank (1), and the drug inlet pipe (91) is used to input the polymerization inhibitor into the recovery tank (1); A connecting pipe (92), the connecting pipe (92) is fixedly connected to the outer conical surface of the water storage bucket (85), and a nozzle (93) is provided below the connecting pipe (92); The anti-polymerization device (9) further comprises: an annular medicine spraying trough (94), the annular medicine spraying trough (94) being fixedly connected to the bottom end of the connecting pipe (92), the annular medicine spraying trough (94) being used to increase the spraying range of the polymerization inhibitor; A limiting clamping plate (95), wherein the limiting clamping plate (95) is fixedly connected to the circumferential surface of the annular medicine sprinkling trough (94); A guide rail (96), wherein the guide rail (96) is fixedly connected to the inner wall of the recovery tank (1); An inner sleeve (97) is fixedly connected to the inner conical surface of the water storage bucket (85), the nozzle (93) is fixedly connected to the lower surface of the annular spraying trough (94), the limiting clamp (95) is rotatably connected to the inner wall of the guide rail (96), and the inner sleeve (97) is rotatably connected to the top surface of the inner wall of the recovery tank (1).

2. The isobutylene recovery device in the tert-butyl acrylate reaction process according to claim 1, characterized in that: The recovery tank (1) further comprises: A limiting half ring (11), wherein the limiting half ring (11) is fixedly connected to a side of the porous baffle (7) close to the main shaft (6); A swirl plate (12) is fixedly connected to the circumferential surface of the main shaft (6), an extension rod (13) is fixedly connected to the lower surface of the swirl plate (12), a connecting plate (14) is fixedly connected to the bottom end of the extension rod (13), and a scraper plastic (15) is fixedly connected to the lower surface of the connecting plate (14), and the scraper plastic (15) is used to scrape off liquid isobutylene adhering to the upper surface of the porous baffle (7), thereby improving the efficiency of the liquid isobutylene gathering at the bottom of the recovery tank (1) and facilitating liquid discharge.

3. The isobutylene recovery device in the tert-butyl acrylate reaction process according to claim 2, characterized in that: The main shaft (6) is rotatably connected to the inner wall of the limiting semi-ring (11), the wiper plastic (15) is in contact with the upper surface of the porous baffle (7), the main shaft (6) is rotatably connected to the side surface of the porous baffle (7), the bottom end of the main shaft (6) is fixedly connected to a motor, and the motor is fixedly connected to the lower surface of the recovery tank (1).

4. The isobutylene recovery device in the tert-butyl acrylate reaction process according to claim 3, characterized in that: The excess liquid recovery device (8) further comprises: An air delivery pipe (86), the air delivery pipe (86) is fixedly connected to the inner wall of the bottom end of the water storage bucket (85), and the air delivery pipe (86) is used to transmit the gaseous isobutylene above the water storage bucket (85) to the bottom of the water storage bucket (85). The top end of the air delivery pipe (86) is fixedly connected to an air suction disk (87), and the conical surface of the air suction disk (87) is provided with an air inlet groove (88). When water droplets in the water suction screen (81) fall into the water storage bucket (85) and gather, the gaseous isobutylene is affected by pressure and gathers near the air suction disk (87) and flows into the air suction disk (87) and the air delivery pipe (86) through the air inlet groove (88) and finally flows to the bottom of the water storage bucket (85) through the air delivery pipe (86); A U-shaped connecting rod (89) is fixedly connected to the top end of the main shaft (6).

5. The isobutylene recovery device in the tert-butyl acrylate reaction process according to claim 4, characterized in that: The air suction disc (87) is rotatably connected to the lower surface of the water suction screen (81), and the top end of the U-shaped connecting rod (89) is fixedly connected to the bottom end of the water storage bucket (85).

6. A method for recovering isobutylene from a tert-butyl acrylate reaction process, using the isobutylene recovery device from a tert-butyl acrylate reaction process according to claim 5, characterized in that: The following steps are involved: Step 1: First, the recovery tank (1) is evacuated by a vacuum pump and an exhaust pipe (4), so that a negative pressure is generated in the recovery tank (1) and the isobutylene is sucked. The isobutylene that has undergone flash evaporation is attracted by suction and flows into the separation tank (2) through the feed pipe (3); Step 2: Then, the isobutylene in the separation tank (2) flows into the recovery tank (1). At this time, the isobutylene in the recovery tank (1) is compressed into liquid by the compressor and the pressure pipe (5) and accumulated at the bottom of the recovery tank (1); Step 3: Subsequently, a polymerization inhibitor is added into the recovery tank (1) through the drug inlet pipe (91) and mixed with the isobutylene to prevent the isobutylene from polymerizing during the liquefaction process; Step 4: Finally, when the liquefied isobutylene needs to be subsequently processed, the discharge pipe (10) is opened and the discharge pipe (10) is connected to the subsequent processing device to complete the discharge.

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