Epoxypropane recovery and purification equipment and process

Abstract

The invention relates to the technical field of purification equipment, and discloses epoxypropane recovery and purification equipment and process, the epoxypropane recovery and purification equipment comprises a purification tank, the top of the purification tank is fixedly communicated with a flow guide pipe, the right side of the flow guide pipe is fixedly communicated with a cooling tower, and the bottom of the purification tank is fixedly connected with a motor; according to the cooling tower, vaporized epoxypropane can be cooled and liquefied again in the cooling tower, then purification of epoxypropane is completed, the temperature rise of mixed liquid can be accelerated, the contact area of the mixed liquid and the heating rod can be increased, epoxypropane can be vaporized rapidly, the temperature rise of the mixed liquid can be increased, the temperature rise of the mixed liquid can be increased, and the temperature rise of the mixed liquid can be reduced. Meanwhile, the gas in the purification tank is exhausted through the hollow cylinder, so that the situation that the gas pressure in the purification tank is too high can be avoided, and the situation that the container is broken or exploded due to the fact that the gas is not exhausted or released in time and the pressure in the container exceeds a safety range is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of purification equipment, and specifically to a propylene oxide recovery and purification equipment and process. Background Art

[0002] Propylene oxide is an important organic chemical raw material, which can be used to produce polyether polyols, propylene glycol, polyurethane, etc. Currently, the common production methods include the chlorohydrin method, the co-oxidation method, and the direct oxidation of propylene method. In the process of directly oxidizing propylene to propylene oxide, propylene and industrial hydrogen peroxide are used as raw materials, and methanol is used as a solvent. This method has the advantages of mild conditions, simple process, good safety, etc., and is a development hotspot.

[0003] The patent with the publication number CN217092083U relates to a propylene oxide recovery and purification device, including a bottom plate. A heating base is provided on the left side of the upper surface of the bottom plate. A separation and purification barrel is provided above the heating base. One end of a first conduit is connected to the upper right side of the separation and purification barrel. The other end of the first conduit is connected to a blower. The blower is fixedly installed on the right side of the separation and purification barrel. The lower end of the blower is connected to a second conduit. A cooling tank is provided on the right side of the upper surface of the bottom plate. A recovery barrel is provided inside the cooling tank. A cover is threadedly connected to the upper side of the recovery barrel. The end of the second conduit away from the blower is connected to the recovery barrel. A drain pipe is connected to the lower left side of the separation and purification barrel. A valve is provided on the drain pipe. After the gaseous propylene oxide enters the recovery barrel, it is cooled into a liquid state, completing the recovery and purification of propylene oxide. The purification efficiency is high, the cost is low, and the operation is simple and convenient. However, during the heating process of propylene oxide by this device, the pressure generated during the heating process is likely not to be released in time, resulting in too high pressure and explosion. Therefore, a propylene oxide recovery and purification equipment and process are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a propylene oxide recovery and purification equipment and process in view of the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A propylene oxide recovery and purification device includes a purification tank. A diversion pipe is fixedly connected and communicated at the top of the purification tank. A cooling tower is fixedly connected and communicated on the right side of the diversion pipe. A motor is fixedly connected to the bottom of the purification tank. An output end of the motor is fixedly connected to a rotating shaft. A cross plate is fixedly connected to the circumferential surface of the rotating shaft. A heating rod is fixedly connected to the inner wall of the cross plate. A toothed ring is fixedly connected to the top of the cross plate. A sleeve is fixedly connected to the top of the purification tank. A hollow cylinder is slidably connected to the inner wall of the sleeve. A first fixing rod is fixedly connected to the inner wall of the purification tank through a spring. A connecting plate is fixedly connected to the inner wall of the hollow cylinder. A reciprocating lead screw is movably connected to the inner wall of the connecting plate. A throttling mechanism for quantitatively adding a catalyst is arranged on the circumferential surface of the purification tank. An adsorption mechanism for improving the purification effect is arranged on the inner wall of the purification tank. A gear is fixedly connected to the circumferential surface of the reciprocating lead screw. The inner wall of the purification tank is rotatably connected to the circumferential surface of the rotating shaft. The circumferential surface of the toothed ring is meshed with the circumferential surface of the gear. The heating rod is used to heat the propylene oxide liquid to vaporize it. The inner wall of the hollow cylinder is slidably connected to the circumferential surface of the first fixing rod, and the first fixing rod is used to provide a downward force for the hollow cylinder, so that the vaporized propylene oxide is cooled and liquefied again inside the cooling tower, thereby completing the purification of propylene oxide, accelerating the temperature rise of the mixed liquid, increasing the contact area between the mixed liquid and the heating rod, enabling propylene oxide to vaporize quickly, and discharging the gas inside the purification tank through the hollow cylinder, thereby avoiding excessive air pressure inside the purification tank, preventing untimely exhaust or pressure relief, and the pressure inside the container exceeding the safety range, resulting in container rupture or explosion.

[0006] Preferably, the throttling mechanism includes a filter plate fixedly connected to the inner wall of the purification tank. A reagent barrel is fixedly connected to the circumferential surface of the purification tank. A flow pipe is fixedly connected and communicated at the bottom of the reagent barrel. The circumferential surface of the reciprocating lead screw is movably connected to the inner wall of the L-shaped plate. A straight plate is fixedly connected to the inner wall of the purification tank. A throttle plate is fixedly connected to the inner wall of the L-shaped plate. A moving plate is movably connected to the circumferential surface of the reciprocating lead screw. A threaded rod is threadedly connected to the inner wall of the moving plate. A brush plate is fixedly connected to the circumferential surface of the threaded rod. The inner wall of the filter plate is rotatably connected to the circumferential surface of the reciprocating lead screw, and the filter plate is used to filter other impurities doped in the vaporized propylene oxide. The inner wall of the filter plate is rotatably connected to the circumferential surface of the threaded rod. The inner wall of the straight plate is rotatably connected to the circumferential surface of the threaded rod. The bottom of the filter plate is in contact with the top of the brush plate, and the brush plate is used to scrape off the condensed impurities. The right side of the flow pipe is in contact with the right side of the throttle plate, and the throttle plate is used to intermittently close the outlet of the flow pipe. The inner wall of the purification tank is slidably connected to the left side of the L-shaped plate. The circumferential surface of the reciprocating lead screw is rotatably connected to the inner wall of the straight plate, which can greatly improve the reaction rate, make the chemical reaction in the heating process reach the predetermined reaction degree faster, thereby improving the purification efficiency, and can control the outflow of the catalytic liquid to avoid the problem that too much catalytic liquid is added at one time, resulting in a poor reaction effect due to the contact of the catalytic liquid with the local mixed liquid. At the same time, some solid impurities attached to the bottom of the filter plate during the heating process of the propylene oxide liquid can be removed in time to avoid affecting the stability of the reaction process. It can also improve the filtering effect of the filter plate and extend the service life of the filter plate by reducing the accumulation of sediments.

[0007] Preferably, the adsorption mechanism includes a second fixed rod, the second fixed rod is fixedly connected to the inner wall of the moving plate, an activated carbon plate is fixedly connected to the circumferential surface of the second fixed rod, a support plate is fixedly connected to the top of the activated carbon plate, a convex block is fixedly connected to the top of the support plate, a chamfered block is fixedly connected to the bottom of the filter plate, an elastic telescopic plate is rotatably connected to the inner wall of the chamfered block through a torsion spring, a transmission wheel is rotatably connected to the inner wall of the telescopic end of the elastic telescopic plate, a baffle is fixedly connected to the bottom of the filter plate, the left side of the baffle is in contact with the right side of the elastic telescopic plate, and the baffle is used to limit the elastic telescopic plate. The top of the convex block is in contact with the circumferential surface of the transmission wheel, which can adsorb excess impurities in the gas and adsorb the moisture in the propylene oxide, so as to improve the purification effect of the propylene oxide. It can also adsorb other gases generated during the heating process of the propylene oxide to avoid releasing them into the air and causing air pollution. At the same time, it can generate an impact force on the support plate and transmit the impact force to the activated carbon plate, thereby increasing the contact opportunity between gas molecules and the activated carbon plate, improving the adsorption efficiency of the activated carbon plate, and reducing the accumulation of particles inside the activated carbon plate. The activated carbon particles can maintain a good dispersion state to ensure that the gas can uniformly pass through the activated carbon layer.

[0008] A purification process for a propylene oxide recovery and purification device includes the following steps: Step 1: When carrying out the purification work of propylene oxide, add the mixed liquid containing propylene oxide into the purification tank. At this time, the motor starts and drives the rotating shaft to rotate, and the rotating shaft drives the cross plate to rotate. Step 2: The cross plate rotates to drive the heating rod to rotate, and the heating rod heats the mixed liquid to about 35 degrees. At this time, the propylene oxide inside the purification tank will vaporize and enter the inside of the cooling tower through the diversion pipe. Step 3: During purification, the cross plate rotates to drive the toothed ring to rotate. The rotation of the toothed ring drives the gear to rotate through the meshing of the teeth. The rotation of the gear drives the reciprocating screw rod to rotate. The reciprocating screw rod rotates and drives the connecting plate to move up and down reciprocally through the threaded groove formed on the surface. The movement of the connecting plate drives the hollow cylinder to move. Step 4: When the hollow cylinder moves up to the top, the ventilation port of the hollow cylinder coincides with the exhaust port of the sleeve, so that the gas inside the purification tank can be discharged through the hollow cylinder.

[0009] Adopting the above technical solutions, the present invention can bring the following beneficial effects: 1. The propylene oxide recovery and purification equipment and process, through the cooperative operation among the purification tank, diversion pipe, cooling tower, motor, rotating shaft, cross plate, heating rod, gear ring, sleeve, hollow cylinder, first fixing rod, connecting plate, gear, and reciprocating lead screw, enables the vaporized propylene oxide to be cooled and liquefied again inside the cooling tower, thereby completing the purification of propylene oxide. Moreover, it can accelerate the temperature rise of the mixed liquid, increase the contact area between the mixed liquid and the heating rod, enable propylene oxide to vaporize rapidly, and at the same time discharge the gas inside the purification tank through the hollow cylinder, thus avoiding excessive air pressure inside the purification tank, preventing untimely exhaust or pressure relief, and preventing the pressure inside the container from exceeding the safety range, which may cause the container to rupture or explode.

[0010] 2. The propylene oxide recovery and purification equipment and process, through the cooperative operation among the filter plate, reagent barrel, circulation pipe, L-shaped plate, straight plate, and throttle plate, can greatly improve the reaction rate, enable the chemical reaction during heating to reach the predetermined reaction degree faster, thereby improving the purification efficiency, and can control the outflow of the catalytic liquid, avoiding the problem that excessive addition of the catalytic liquid at one time may cause poor reaction effect due to the contact between the catalytic liquid and the local mixed liquid.

[0011] 3. The propylene oxide recovery and purification equipment and process, through the cooperative operation among the moving plate, threaded rod, and brush plate, can timely remove some solid impurities adhering to the bottom of the filter plate during the heating process of the propylene oxide liquid, avoiding affecting the stability of the reaction process. It can also improve the filtering effect of the filter plate and extend the service life of the filter plate by reducing the accumulation of sediments.

[0012] 4. The propylene oxide recovery and purification equipment and process, through the cooperative operation between the second fixing rod and the activated carbon plate, can adsorb the excess impurities in the gas and the moisture in the propylene oxide, enabling the improvement of the purification effect of propylene oxide. It can also adsorb other gases generated during the heating process of propylene oxide, avoiding releasing them into the air and causing air pollution.

[0013] 5. The propylene oxide recovery and purification equipment and process, through the cooperative operation among the support plate, convex block, chamfered block, elastic telescopic plate, transmission wheel, and baffle plate, can generate an impact force on the support plate and transmit the impact force to the activated carbon plate, thereby increasing the contact opportunity between gas molecules and the activated carbon plate, improving the adsorption efficiency of the activated carbon plate, and at the same time reducing the accumulation of particles inside the activated carbon plate. The activated carbon particles can maintain a good dispersed state, ensuring that the gas can uniformly pass through the activated carbon layer. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a half-sectional view of the sleeve structure of the present invention; Figure 3 Half-sectional view of the filter plate of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of the structure at position A in; Figure 5 Half-sectional view of the throttling mechanism of the present invention; Figure 6 Half-sectional view of the adsorption mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at position B in.

[0015] In the figure: 1, purification tank; 2, diversion pipe; 3, cooling tower; 4, motor; 5, rotating shaft; 6, cross plate; 7, heating rod; 8, toothed ring; 9, sleeve; 10, hollow cylinder; 11, first fixing rod; 12, connecting plate; 13, reciprocating lead screw; 14, throttling mechanism; 141, filter plate; 142, reagent barrel; 143, flow pipe; 144, L-shaped plate; 145, straight plate; 146, throttle plate; 147, moving plate; 148, threaded rod; 149, brush plate; 15, adsorption mechanism; 151, second fixing rod; 152, activated carbon plate; 153, support plate; 154, convex block; 155, chamfered block; 156, elastic telescopic plate; 157, transmission wheel; 158, baffle; 16, gear. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1-7, an embodiment of the present invention is: a propylene oxide recovery and purification device, including a purification tank 1. A diversion pipe 2 is fixedly connected to the top of the purification tank 1. A cooling tower 3 is fixedly connected to the right side of the diversion pipe 2. A motor 4 is fixedly connected to the bottom of the purification tank 1. The output end of the motor 4 is fixedly connected to a rotating shaft 5. A cross plate 6 is fixedly connected to the circumferential surface of the rotating shaft 5. A heating rod 7 is fixedly connected to the inner wall of the cross plate 6. A toothed ring 8 is fixedly connected to the top of the cross plate 6. A sleeve 9 is fixedly connected to the top of the purification tank 1. A hollow cylinder 10 is slidably connected to the inner wall of the sleeve 9. A first fixed rod 11 is fixedly connected to the inner wall of the purification tank 1 through a spring. A connecting plate 12 is fixedly connected to the inner wall of the hollow cylinder 10. A reciprocating lead screw 13 is movably connected to the inner wall of the connecting plate 12. A throttling mechanism 14 for quantitatively adding a catalyst is arranged on the circumferential surface of the purification tank 1. An adsorption mechanism 15 for improving the purification effect is arranged on the inner wall of the purification tank 1. A gear 16 is fixedly connected to the circumferential surface of the reciprocating lead screw 13.

[0018] When carrying out the purification work of propylene oxide, the mixed liquid containing propylene oxide is added into the purification tank 1. At this time, the motor 4 is started and drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives the cross plate 6 to rotate. The rotation of the cross plate 6 drives the heating rod 7 to rotate. The heating rod 7 will heat the mixed liquid to about 35 degrees Celsius. At this time, the propylene oxide inside the purification tank 1 will vaporize and enter the cooling tower 3 through the diversion pipe 2. Thus, the vaporized propylene oxide is cooled and liquefied again inside the cooling tower 3, and then the purification of propylene oxide is completed. The rotation of the rotating shaft 5 drives the heating rod 7 to rotate, which can accelerate the temperature rise of the mixed liquid and increase the contact area between the mixed liquid and the heating rod 7, enabling the propylene oxide to vaporize quickly.

[0019] The inner wall of the purification tank 1 is rotatably connected to the circumferential surface of the rotating shaft 5. The circumferential surface of the toothed ring 8 meshes with the circumferential surface of the gear 16. The heating rod 7 is used to heat the propylene oxide liquid to vaporize it. The inner wall of the hollow cylinder 10 is slidably connected to the circumferential surface of the first fixed rod 11, and the first fixed rod 11 is used to provide downward power for the hollow cylinder 10.

[0020] During purification, the rotation of the cross plate 6 drives the toothed ring 8 to rotate. The rotation of the toothed ring 8 drives the gear 16 to rotate through tooth engagement. The rotation of the gear 16 drives the reciprocating lead screw 13 to rotate. The rotation of the reciprocating lead screw 13 drives the connecting plate 12 to move up and down reciprocally through the threaded groove formed on the surface. The movement of the connecting plate 12 drives the hollow cylinder 10 to move. When the hollow cylinder 10 moves up to the top, the ventilation opening of the hollow cylinder 10 coincides with the exhaust port of the sleeve 9, so that the gas inside the purification tank 1 can be discharged through the hollow cylinder 10, thereby avoiding excessive air pressure inside the purification tank 1 and preventing the container from bursting or exploding due to the internal pressure exceeding the safety range without timely exhaust or pressure relief.

[0021] Overall working principle: The motor 4 starts and drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives the cross plate 6 to rotate, and the rotation of the cross plate 6 drives the heating rod 7 to rotate. The heating rod 7 will heat the mixed liquid to about 35 degrees Celsius. At this time, the propylene oxide inside the purification tank 1 will vaporize, causing the vaporized propylene oxide to be cooled and liquefied again inside the cooling tower 3, thereby completing the purification of propylene oxide. At the same time, when the hollow cylinder 10 moves upward to the top, the ventilation opening of the hollow cylinder 10 will coincide with the exhaust port of the sleeve 9, avoiding the pressure inside the container exceeding the safety range due to failure to exhaust or relieve pressure in time.

[0022] The throttling mechanism 14 includes a filter plate 141, the filter plate 141 is fixedly connected to the inner wall of the purification tank 1, the circumferential surface of the purification tank 1 is fixedly connected with a medicine barrel 142, the bottom of the medicine barrel 142 is fixedly communicated with a flow pipe 143, the circumferential surface of the reciprocating lead screw 13 is movably connected to the inner wall of the L-shaped plate 144, the inner wall of the purification tank 1 is fixedly connected with a straight plate 145, the inner wall of the L-shaped plate 144 is fixedly connected with a throttling plate 146, the circumferential surface of the reciprocating lead screw 13 is movably connected to a moving plate 147, the inner wall of the moving plate 147 is threadedly connected with a threaded rod 148, and the circumferential surface of the threaded rod 148 is fixedly connected with a brush plate 149.

[0023] During the pressure relief process, the reciprocating lead screw 13 rotates to drive the L-shaped plate 144 to move up and down reciprocally through the threaded groove provided on its surface. The movement of the L-shaped plate 144 drives the throttling plate 146 to move up and down. During heating, the catalyst in the medicine barrel 142 will enter the inside of the purification tank 1 through the flow pipe 143, which can greatly increase the reaction rate, enabling the chemical reaction during heating to reach the predetermined reaction degree faster, thereby improving the purification efficiency. When adding the catalytic liquid, the throttling plate 146 moves up and down to frequently open and close the discharge port of the flow pipe 143, enabling the outflow of the catalytic liquid to be controlled, avoiding the problem that too much catalytic liquid is added at one time, resulting in poor reaction effect due to the contact between the catalytic liquid and the local mixed liquid.

[0024] The inner wall of the filter plate 141 is rotatably connected to the circumferential surface of the reciprocating lead screw 13, and the filter plate 141 is used to filter other impurities doped in the vaporized propylene oxide. The inner wall of the filter plate 141 is rotatably connected to the circumferential surface of the threaded rod 148, the inner wall of the straight plate 145 is rotatably connected to the circumferential surface of the threaded rod 148, the bottom of the filter plate 141 is in contact with the top of the brush plate 149, and the brush plate 149 is used to scrape off the condensed impurities. The right side of the flow pipe 143 is in contact with the right side of the throttling plate 146, and the throttling plate 146 is used to intermittently close the outlet of the flow pipe 143. The inner wall of the purification tank 1 is slidably connected to the left side of the L-shaped plate 144, and the circumferential surface of the reciprocating lead screw 13 is rotatably connected to the inner wall of the straight plate 145.

[0025] When pressure relief is carried out, the reciprocating screw rod 13 rotates and drives the moving plate 147 to move up and down reciprocally through the threads provided on its surface. The moving plate 147 moves and the slider inside the moving plate 147 contacts the threads on the surface of the threaded rod 148, enabling the threaded rod 148 to rotate. The rotation of the threaded rod 148 drives the brush plate 149 to rotate, so that some solid impurities attached to the bottom of the filter plate 141 during the heating process of the propylene oxide liquid can be removed in a timely manner to avoid affecting the stability of the reaction process. It can also improve the filtering effect of the filter plate 141 and extend the service life of the filter plate 141 by reducing the accumulation of sediments.

[0026] Overall working principle: The reciprocating screw rod 13 rotates and drives the L-shaped plate 144 to move up and down reciprocally through the threaded groove provided on its surface. The movement of the L-shaped plate 144 drives the throttle plate 146 to move up and down. When heating, the reaction rate can be greatly increased. When adding the catalytic liquid, the up and down movement of the throttle plate 146 will frequently open and close the discharge port of the flow pipe 143, capable of controlling the outflow of the catalytic liquid. The reciprocating screw rod 13 rotates and drives the moving plate 147 to move up and down reciprocally through the threads provided on its surface. The moving plate 147 moves and the slider inside the moving plate 147 contacts the threads on the surface of the threaded rod 148, enabling the threaded rod 148 to rotate. The rotation of the threaded rod 148 drives the brush plate 149 to rotate, thus removing it in a timely manner to avoid affecting the stability of the reaction process.

[0027] A purification process for a propylene oxide recovery and purification device includes the following steps: Step 1: When carrying out the propylene oxide purification work, add the mixed liquid containing propylene oxide into the purification tank 1. At this time, the motor 4 starts and drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives the cross plate 6 to rotate; Step 2: The rotation of the cross plate 6 drives the heating rod 7 to rotate. The heating rod 7 heats the mixed liquid to about 35 degrees. At this time, the propylene oxide inside the purification tank 1 will vaporize and enter the inside of the cooling tower 3 through the diversion pipe 2; Step 3: When carrying out purification, the rotation of the cross plate 6 drives the gear ring 8 to rotate. The rotation of the gear ring 8 drives the gear 16 to rotate through tooth engagement. The rotation of the gear 16 drives the reciprocating screw rod 13 to rotate. The reciprocating screw rod 13 rotates and drives the connecting plate 12 to move up and down reciprocally through the threaded groove provided on its surface. The movement of the connecting plate 12 drives the hollow cylinder 10 to move; Step 4: When the hollow cylinder 10 moves up to the top, the ventilation port of the hollow cylinder 10 will coincide with the exhaust port of the sleeve 9, so that the gas inside the purification tank 1 can be discharged through the hollow cylinder 10.

[0028] Please refer to Figures 1-7, on the basis of the above embodiments, in another embodiment of the present invention, the adsorption mechanism 15 includes a second fixed rod 151. The second fixed rod 151 is fixedly connected to the inner wall of the moving plate 147. The circumferential surface of the second fixed rod 151 is fixedly connected with an activated carbon plate 152. The top of the activated carbon plate 152 is fixedly connected with a support plate 153. The top of the support plate 153 is fixedly connected with a convex block 154. The bottom of the filter plate 141 is fixedly connected with a chamfered block 155. The inner wall of the chamfered block 155 is rotatably connected with an elastic telescopic plate 156 through a torsion spring. The inner wall of the telescopic end of the elastic telescopic plate 156 is rotatably connected with a transmission wheel 157. The bottom of the filter plate 141 is fixedly connected with a baffle 158.

[0029] During heating, the movement of the moving plate 147 drives the second fixed rod 151 to move, and the movement of the second fixed rod 151 drives the activated carbon plate 152 to move, which can improve the adsorption effect of the filter plate 141, thereby adsorbing excess impurities in the gas and the moisture in propylene oxide, improving the purification effect of propylene oxide, and also adsorbing other gases generated during the heating of propylene oxide to avoid releasing them into the air and causing air pollution.

[0030] The left side of the baffle 158 is in contact with the right side of the elastic telescopic plate 156, and the baffle 158 is used to limit the elastic telescopic plate 156. The top of the convex block 154 is in contact with the circumferential surface of the transmission wheel 157.

[0031] When the activated carbon plate 152 moves upward, the activated carbon plate 152 drives the support plate 153 to move upward, and the support plate 153 drives the convex block 154 to move upward. During the movement, it will contact the transmission wheel 157 and exert a squeezing force on the transmission wheel 157, causing the transmission wheel 157 to drive the elastic telescopic plate 156 to rotate clockwise. During the rotation of the elastic telescopic plate 156, the spring will stretch and extend, causing the transmission wheel 157 to move to the left and contact the convex block 154. When contacting, it will exert a squeezing force on the transmission wheel 157, causing the transmission wheel 157 to drive the elastic telescopic plate 156 to rotate clockwise again. When the transmission wheel 157 passes over the convex block 154, the elastic telescopic plate 156 drives the transmission wheel 157 to rotate counterclockwise through the torsion spring, thereby generating an impact force on the support plate 153 and conducting the impact force to the activated carbon plate 152, which can increase the contact opportunity between gas molecules and the activated carbon plate 152, improve the adsorption efficiency of the activated carbon plate 152, and at the same time reduce the accumulation of particles inside the activated carbon plate 152. The activated carbon particles can maintain a good dispersed state to ensure that the gas can pass through the activated carbon layer evenly.

[0032] Overall working principle: When heating, the moving plate 147 moves to drive the second fixed rod 151 to move, and the movement of the second fixed rod 151 drives the activated carbon plate 152 to move, which can improve the adsorption effect of the filter plate 141 and prevent air pollution caused by release into the air. During the movement, it will contact the transmission wheel 157, and the elastic telescopic plate 156 drives the transmission wheel 157 to rotate counterclockwise through the torsion spring, thereby generating an impact force on the support plate 153 and transmitting the impact force to the activated carbon plate 152, which can increase the contact opportunity between gas molecules and the activated carbon plate 152 and improve the adsorption efficiency of the activated carbon plate 152.

[0033] The present invention provides a propylene oxide recovery and purification device and process. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be realized by the prior art.

Claims

1. An epoxy propane recovery and purification device, comprising a purification tank (1), characterized in that: The top of the purification tank (1) is fixedly communicated with a diversion pipe (2), the right side of the diversion pipe (2) is fixedly communicated with a cooling tower (3), the bottom of the purification tank (1) is fixedly connected with a motor (4), the output end of the motor (4) is fixedly connected with a rotating shaft (5), the circumferential surface of the rotating shaft (5) is fixedly connected with a cross plate (6), the inner wall of the cross plate (6) is fixedly connected with a heating rod (7), the top of the cross plate (6) is fixedly connected with a toothed ring (8), the top of the purification tank (1) is fixedly connected with a sleeve (9), the inner wall of the sleeve (9) is slidably connected with a hollow cylinder (10), the inner wall of the purification tank (1) is fixedly connected with a first fixing rod (11) through a spring, the inner wall of the hollow cylinder (10) is fixedly connected with a connecting plate (12), the inner wall of the connecting plate (12) is movably connected with a reciprocating lead screw (13), the circumferential surface of the purification tank (1) is provided with a throttling mechanism (14) for quantitatively adding a catalyst, the inner wall of the purification tank (1) is provided with an adsorption mechanism (15) for improving the purification effect, and the circumferential surface of the reciprocating lead screw (13) is fixedly connected with a gear (16).

2. The propylene oxide recovery and purification equipment according to claim 1, wherein: The inner wall of the purification tank (1) is rotatably connected with the circumferential surface of the rotating shaft (5), the circumferential surface of the toothed ring (8) is meshed with the circumferential surface of the gear (16), and the heating rod (7) is used to heat the propylene oxide liquid to vaporize it. The inner wall of the hollow cylinder (10) is slidably connected with the circumferential surface of the first fixing rod (11), and the first fixing rod (11) is used to provide downward power for the hollow cylinder (10).

3. The propylene oxide recovery and purification equipment according to claim 2, characterized in that: The throttling mechanism (14) includes a filter plate (141), the filter plate (141) is fixedly connected to the inner wall of the purification tank (1), the circumferential surface of the purification tank (1) is fixedly connected with a medicine barrel (142), the bottom of the medicine barrel (142) is fixedly communicated with a flow pipe (143), and the circumferential surface of the reciprocating lead screw (13) is movably connected with the inner wall of an L-shaped plate (144).

4. The propylene oxide recovery and purification equipment according to claim 3, characterized in that: The inner wall of the purification tank (1) is fixedly connected with a straight plate (145), the inner wall of the L-shaped plate (144) is fixedly connected with a throttling plate (146), the circumferential surface of the reciprocating lead screw (13) is movably connected with a moving plate (147), the inner wall of the moving plate (147) is threadedly connected with a threaded rod (148), and the circumferential surface of the threaded rod (148) is fixedly connected with a brush plate (149).

5. The propylene oxide recovery and purification equipment according to claim 4, characterized in that: The inner wall of the filter plate (141) is rotatably connected to the circumferential surface of the reciprocating lead screw (13), and the filter plate (141) is used to filter other impurities doped in the vaporized propylene oxide. The inner wall of the filter plate (141) is rotatably connected to the circumferential surface of the threaded rod (148). The inner wall of the straight plate (145) is rotatably connected to the circumferential surface of the threaded rod (148). The bottom of the filter plate (141) is in contact with the top of the brush plate (149), and the brush plate (149) is used to scrape off the condensed impurities. The right side of the flow pipe (143) is in contact with the right side of the throttle plate (146), and the throttle plate (146) is used to intermittently close the outlet of the flow pipe (143). The inner wall of the purification tank (1) is slidably connected to the left side of the L-shaped plate (144). The circumferential surface of the reciprocating lead screw (13) is rotatably connected to the inner wall of the straight plate (145).

6. The propylene oxide recovery and purification equipment according to claim 5, characterized in that: The adsorption mechanism (15) includes a second fixed rod (151). The second fixed rod (151) is fixedly connected to the inner wall of the moving plate (147). An activated carbon plate (152) is fixedly connected to the circumferential surface of the second fixed rod (151). A support plate (153) is fixedly connected to the top of the activated carbon plate (152). A convex block (154) is fixedly connected to the top of the support plate (153). A chamfered block (155) is fixedly connected to the bottom of the filter plate (141).

7. An epoxy propane recovery and purification device according to claim 6, characterized in that: An elastic telescopic plate (156) is rotatably connected to the inner wall of the chamfered block (155) through a torsion spring. A transmission wheel (157) is rotatably connected to the inner wall of the telescopic end of the elastic telescopic plate (156). A baffle (158) is fixedly connected to the bottom of the filter plate (141).

8. An epoxy propane recovery and purification device according to claim 7, characterized in that: The left side of the baffle (158) is in contact with the right side of the elastic telescopic plate (156), and the baffle (158) is used to limit the elastic telescopic plate (156). The top of the convex block (154) is in contact with the circumferential surface of the transmission wheel (157).

9. A purification process for a propylene oxide recovery and purification device, using a propylene oxide recovery and purification device as described in claim 8, characterized in that: Including the following steps: Step 1: When carrying out the purification work of propylene oxide, add the mixed liquid containing propylene oxide into the purification tank (1). At this time, the motor (4) starts and drives the rotating shaft (5) to rotate. The rotation of the rotating shaft (5) drives the cross plate (6) to rotate; Step 2: The rotation of the cross plate (6) drives the heating rod (7) to rotate. The heating rod (7) heats the mixed liquid to about 35 degrees. At this time, the propylene oxide inside the purification tank (1) will vaporize and enter the inside of the cooling tower (3) through the diversion pipe (2); Step 3: When carrying out purification, the rotation of the cross plate (6) drives the toothed ring (8) to rotate. The rotation of the toothed ring (8) drives the gear (16) to rotate through the meshing of the teeth. The rotation of the gear (16) drives the reciprocating lead screw (13) to rotate. The rotation of the reciprocating lead screw (13) drives the connecting plate (12) to move up and down reciprocally through the threaded groove formed on the surface. The movement of the connecting plate (12) drives the hollow cylinder (10) to move; Step 4: When the hollow cylinder (10) moves upward to the top, the vent of the hollow cylinder (10) will coincide with the exhaust port of the sleeve (9), so that the gas inside the purification tank (1) can be discharged through the hollow cylinder (10).

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