A propylene oxide recovery and purification equipment and process

Abstract

The invention relates to the technical field of purification equipment and discloses a propylene oxide recovery and purification device and process. The device comprises a purification tank, wherein the top of the purification tank is fixedly connected to a guide pipe, the right side of the guide pipe is fixedly connected to a cooling tower, the bottom of the purification tank is fixedly connected to a motor, and the output end of the motor is fixedly connected to a rotating shaft. The device can cool the vaporized propylene oxide inside the cooling tower and liquefy it again, thereby completing the purification of the propylene oxide, accelerating the temperature increase of the mixed liquid, and increasing the contact area between the mixed liquid and the heating rod, so that the propylene oxide can be quickly vaporized. At the same time, the gas inside the purification tank is discharged through a hollow cylinder, thereby avoiding excessive air pressure inside the purification tank, avoiding the pressure inside the container exceeding a safe range due to failure to exhaust or release pressure in time, and causing the container to rupture or explode.

Description

Technical Field

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

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

[0003] The patent with publication number CN217092083U relates to a propylene oxide recovery and purification device, comprising 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 on the upper side of 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 fan, the fan is fixedly installed on the right side of the separation and purification barrel, the lower end of the fan is connected to a second conduit, a cooling groove is provided on the right side of the upper surface of the bottom plate, a recovery barrel is provided inside the cooling groove, a cover is threadedly connected to the upper side of the recovery barrel, and the One end of the second conduit away from the blower is connected to the recovery barrel, and the lower left side of the separation and purification barrel is connected to a drain pipe, and the drain pipe is provided with a valve. After the gaseous propylene oxide enters the recovery barrel, it is cooled into liquid, completing the recovery and purification of the propylene oxide. The purification efficiency is high, the cost is low, and the operation is simple and convenient. However, during the heating process of the propylene oxide, the pressure generated during the heating process is prone to not be released in time, which leads to the problem of explosion caused by excessive pressure. Therefore, a propylene oxide recovery and purification device 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 device and process in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a propylene oxide recovery and purification equipment, including a purification tank, the top of the purification tank is fixedly connected with a guide pipe, the right side of the guide pipe is fixedly connected with a cooling tower, the bottom of the purification tank is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating shaft, the circumferential surface of the rotating shaft is fixedly connected with a cross plate, the inner wall of the cross plate is fixedly connected with a heating rod, the top of the cross plate is fixedly connected with a gear ring, the top of the purification tank is fixedly connected with a sleeve, the inner wall of the sleeve is slidably connected with a hollow cylinder, the inner wall of the purification tank is fixedly connected with a fixed rod 1 through a spring, the inner wall of the hollow cylinder is fixedly connected with a connecting plate, the inner wall of the connecting plate is movably connected with a reciprocating screw rod, the circumferential surface of the purification tank is provided with a throttling mechanism for quantitatively adding a catalyst, and the inner wall of the purification tank is provided with a throttling mechanism for increasing The adsorption mechanism has a purification effect, the circumferential surface of the reciprocating screw is fixedly connected with a gear, the inner wall of the purification tank is rotatably connected to the circumferential surface of the rotating shaft, the circumferential surface of the gear ring and the circumferential surface of the gear are meshed with each other, 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 fixed rod one, and the fixed rod one is used to provide downward power 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, and can accelerate the temperature increase of the mixed liquid, and will increase the contact area between the mixed liquid and the heating rod, so that the propylene oxide can be quickly vaporized, and at the same time, the gas inside the purification tank is discharged through the hollow cylinder, thereby avoiding excessive air pressure inside the purification tank, avoiding timely exhaust or pressure relief, and the pressure inside the container exceeds the safety range, causing the container to rupture or explode.

[0006] Preferably, the throttling mechanism includes a filter plate, which is fixedly connected to the inner wall of the purification tank, the circumferential surface of the purification tank is fixedly connected to the medicine barrel, the bottom of the medicine barrel is fixedly connected to a circulation pipe, the circumferential surface of the reciprocating screw is movably connected to the inner wall of the L-shaped plate, the inner wall of the purification tank is fixedly connected to a straight plate, the inner wall of the L-shaped plate is fixedly connected to the throttling plate, the circumferential surface of the reciprocating screw is movably connected to the movable plate, the inner wall of the movable plate is threadedly connected to a threaded rod, the circumferential surface of the threaded rod is fixedly connected to a brush plate, the inner wall of the filter plate is rotatably connected to the circumferential surface of the reciprocating 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, and the bottom of the filter plate and the top of the brush plate are in contact with each other. , and the brush plate is used to scrape off condensed impurities, the right side of the circulation 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 circulation pipe, the inner wall of the purification tank is slidingly connected to the left side of the L-shaped plate, and the circumferential surface of the reciprocating screw is rotatably connected to the inner wall of the straight plate, which can greatly increase the reaction rate, so that the chemical reaction in the heating process reaches the predetermined reaction degree faster, thereby improving the purification efficiency, and can control the outflow of the catalyst liquid to avoid adding too much catalyst liquid at one time, resulting in the catalyst liquid contacting with the local mixed liquid and causing poor reaction effect. 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 sediment.

[0007] Preferably, the adsorption mechanism includes a second fixing rod, the second fixing rod is fixedly connected to the inner wall of the movable plate, the circumferential surface of the second fixing rod is fixedly connected to the activated carbon plate, the top of the activated carbon plate is fixedly connected to the support plate, the top of the support plate is fixedly connected to a protrusion, the bottom of the filter plate is fixedly connected to a chamfered block, the inner wall of the chamfered block is rotatably connected to the elastic telescopic plate through a torsion spring, the inner wall of the telescopic end of the elastic telescopic plate is rotatably connected to the transmission wheel, the bottom of the filter plate is fixedly connected to a baffle, the left side of the baffle is in contact with the right side of the elastic telescopic plate, and the baffle will be used to limit the elastic telescopic plate, so The top of the protrusion is in contact with the circumferential surface of the transmission wheel, which can absorb excess impurities in the gas and moisture in propylene oxide, thereby improving the purification effect of propylene oxide. It can also adsorb other gases generated during the heating process of propylene oxide to avoid releasing them into the air and causing air pollution. At the same time, it can generate 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, ensuring that the gas can pass through the activated carbon layer evenly.

[0008] A purification process for propylene oxide recovery and purification equipment comprises the following steps:

[0009] Step 1: When performing propylene oxide purification work, a mixed liquid containing propylene oxide is added to the interior of the purification tank. At this time, the motor starts and drives the rotating shaft to rotate, and the rotation of the rotating shaft drives the cross plate to rotate;

[0010] Step 2: The cross plate rotates to drive the heating rod to rotate. The heating rod will heat the mixed liquid to about 35 degrees. At this time, the propylene oxide inside the purification tank will vaporize and enter the interior of the cooling tower through the guide pipe;

[0011] Step 3: During purification, the cross plate rotates to drive the gear ring to rotate, and the gear ring rotates through the meshing of the teeth, and the gear rotates to drive the reciprocating screw to rotate, and the reciprocating screw rotates through the threaded groove on the surface to drive the connecting plate to move up and down, and the movement of the connecting plate drives the hollow cylinder to move;

[0012] Step 4: When the hollow tube moves upward to the top, the vent of the hollow tube will coincide with the exhaust port of the sleeve, so that the gas inside the purification tank can be discharged through the hollow tube.

[0013] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0014] 1. The propylene oxide recovery and purification equipment and process, through the coordinated operation between the purification tank, the guide pipe, the cooling tower, the motor, the rotating shaft, the cross plate, the heating rod, the gear ring, the sleeve, the hollow cylinder, the fixed rod, the connecting plate, the gear, and the reciprocating screw, enables the vaporized propylene oxide to be cooled and liquefied again inside the cooling tower, thereby completing the purification of the propylene oxide, and can accelerate the temperature increase of the mixed liquid, and increase the contact area between the mixed liquid and the heating rod, so that the propylene oxide can be quickly vaporized. At the same time, the gas inside the purification tank is discharged through the hollow cylinder, thereby avoiding excessive air pressure inside the purification tank, and avoiding the pressure inside the container exceeding the safe range due to failure to exhaust or release the pressure in time, causing the container to rupture or explode.

[0015] 2. The propylene oxide recovery and purification equipment and process can greatly increase the reaction rate through the coordinated operation of the filter plate, reagent barrel, circulation tube, L-shaped plate, straight plate, and throttle plate, so that the chemical reaction in the heating process reaches the predetermined reaction degree more quickly, thereby improving the purification efficiency. It can also control the outflow of the catalyst liquid to avoid adding too much catalyst liquid at one time, which causes the catalyst liquid to contact with the local mixed liquid and cause poor reaction effect.

[0016] 3. The propylene oxide recovery and purification equipment and process, through the coordinated operation of the moving plate, threaded rod and brush plate, can promptly remove some solid impurities attached to the bottom of the filter plate during the heating process of the propylene oxide liquid 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 sediment.

[0017] 4. The propylene oxide recovery and purification equipment and process can absorb excess impurities in the gas and moisture in propylene oxide through the coordinated operation between the fixed rod 2 and the activated carbon plate, thereby improving the purification effect of propylene oxide. It can also adsorb other gases generated during the heating process of propylene oxide to prevent them from being released into the air and causing air pollution.

[0018] 5. The propylene oxide recovery and purification equipment and process can generate impact force on the support plate through the coordinated operation between the support plate, protrusions, chamfered blocks, elastic telescopic plates, transmission wheels, and baffles, and transmit the impact force to the activated carbon plate, thereby increasing the contact opportunities 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 better dispersion state, ensuring that the gas can pass through the activated carbon layer evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2A half-section view of the sleeve structure of the present invention;

[0021] Figure 3 A half-section view of the filter plate of the present invention;

[0022] Figure 4 For the present invention Figure 2 A magnified view of the structure at center A;

[0023] Figure 5 It is a half-section diagram of the throttling mechanism of the present invention;

[0024] Figure 6 A half-section diagram of the adsorption mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle.

[0026] In the figure: 1. purification tank; 2. guide pipe; 3. cooling tower; 4. motor; 5. rotating shaft; 6. cross plate; 7. heating rod; 8. gear ring; 9. sleeve; 10. hollow cylinder; 11. fixed rod 1; 12. connecting plate; 13. reciprocating screw; 14. throttling mechanism; 141. filter plate; 142. reagent barrel; 143. circulation pipe; 144. L-shaped plate; 145. straight plate; 146. throttling plate; 147. moving plate; 148. threaded rod; 149. brush plate; 15. adsorption mechanism; 151. fixed rod 2; 152. activated carbon plate; 153. support plate; 154. bump; 155. chamfered block; 156. elastic telescopic plate; 157. transmission wheel; 158. baffle; 16. gear. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 7One embodiment of the present invention is: a propylene oxide recovery and purification device, comprising a purification tank 1, the top of the purification tank 1 is fixedly connected to a guide pipe 2, the right side of the guide pipe 2 is fixedly connected to a cooling tower 3, the bottom of the purification tank 1 is fixedly connected to a motor 4, the output end of the motor 4 is fixedly connected to a rotating shaft 5, the circumferential surface of the rotating shaft 5 is fixedly connected to a cross plate 6, the inner wall of the cross plate 6 is fixedly connected to a heating rod 7, the top of the cross plate 6 is fixedly connected to a gear ring 8, the top of the purification tank 1 is fixed It is 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 fixed 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 screw 13, the circumferential surface of the purification tank 1 is provided with a throttling mechanism 14 for quantitatively adding 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 screw 13 is fixedly connected with a gear 16.

[0029] When propylene oxide is being purified, a mixed liquid containing propylene oxide is added to the interior of 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. At this time, the propylene oxide inside the purification tank 1 will vaporize and enter the interior of the cooling tower 3 through the guide pipe 2, so that the vaporized propylene oxide is cooled and liquefied again inside the cooling tower 3, thereby completing the purification of propylene oxide. The rotating shaft 5 drives the heating rod 7 to rotate, which can accelerate the temperature increase of the mixed liquid and increase the contact area between the mixed liquid and the heating rod 7, so that the propylene oxide can be quickly vaporized.

[0030] 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 gear ring 8 is meshed 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 fixed rod 11, and the fixed rod 11 is used to provide downward power for the hollow cylinder 10.

[0031] During purification, the cross plate 6 rotates to drive the gear ring 8 to rotate. The rotation of the gear ring 8 will drive the gear 16 to rotate through the meshing of the teeth. The rotation of the gear 16 drives the reciprocating screw 13 to rotate. The reciprocating screw 13 rotates through the threaded groove opened on the surface to drive the connecting plate 12 to move up and down. The movement of the connecting plate 12 drives the hollow cylinder 10 to move. 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, thereby avoiding the air pressure inside the purification tank 1 from being too high, and avoiding the pressure inside the container from exceeding the safety range due to failure to vent or relieve pressure in time, causing the container to rupture or explode.

[0032] The overall working principle: the motor 4 starts and drives the rotating shaft 5 to rotate, the rotating shaft 5 rotates and drives the cross plate 6 to rotate, the cross plate 6 rotates and drives the heating rod 7 to rotate, the heating rod 7 will heat the mixed liquid to about thirty-five degrees, at this time the propylene oxide inside the purification tank 1 will be vaporized, so that the vaporized propylene oxide is cooled and liquefied again inside the cooling tower 3, thereby completing the purification of propylene oxide, and at the same time 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, to avoid timely exhaust or pressure relief, and the pressure inside the container exceeds the safety range.

[0033] The throttling mechanism 14 includes a filter plate 141, which is fixedly connected to the inner wall of the purification tank 1. The circumferential surface of the purification tank 1 is fixedly connected to the medicine barrel 142. The bottom of the medicine barrel 142 is fixedly connected to the circulation pipe 143. The circumferential surface of the reciprocating 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 to the straight plate 145. The inner wall of the L-shaped plate 144 is fixedly connected to the throttling plate 146. The circumferential surface of the reciprocating screw 13 is movably connected to the movable plate 147. The inner wall of the movable plate 147 is threadedly connected to the threaded rod 148. The circumferential surface of the threaded rod 148 is fixedly connected to the brush plate 149.

[0034] During the pressure relief process, the reciprocating screw 13 rotates through the threaded groove opened on the surface to drive the L-shaped plate 144 to move back and forth up and down, and the movement of the L-shaped plate 144 drives the throttle plate 146 to move up and down. During heating, the catalyst in the reagent barrel 142 will enter the interior of the purification tank 1 through the circulation pipe 143, thereby greatly improving the reaction rate, so that the chemical reaction in the heating process reaches the predetermined reaction degree faster, thereby improving the purification efficiency. When adding catalytic liquid, the throttle plate 146 moves up and down to frequently open and close the discharge port of the circulation pipe 143, so that the outflow of catalytic liquid can be controlled to avoid too much catalytic liquid being added at one time, which causes the catalytic liquid to contact with the local mixed liquid and cause poor reaction effect.

[0035] The inner wall of the filter plate 141 is rotatably connected to the circumferential surface of the reciprocating screw 13, and the filter plate 141 is used to filter other impurities mixed 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, and 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 condensed impurities. The right side of the circulation tube 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 circulation tube 143. The inner wall of the purification tank 1 is slidingly connected to the left side of the L-shaped plate 144, and the circumferential surface of the reciprocating screw 13 is rotatably connected to the inner wall of the straight plate 145.

[0036] When relieving pressure, the reciprocating screw 13 rotates through the threads on the surface to drive the movable plate 147 to move back and forth up and down. The movable plate 147 moves through the slider inside the movable plate 147 to contact the threads on the surface of the threaded rod 148, so that the threaded rod 148 can 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 time 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 sediment.

[0037] The overall working principle: the reciprocating screw 13 rotates through the thread groove opened on the surface to drive the L-shaped plate 144 to move back and forth up and down, and the movement of the L-shaped plate 144 drives the throttle plate 146 to move up and down, which can greatly increase the reaction rate during heating. When the catalytic liquid is added, the throttle plate 146 moves up and down to frequently open and close the discharge port of the circulation tube 143, which can control the outflow of the catalytic liquid. The reciprocating screw 13 rotates through the thread opened on the surface to drive the moving plate 147 to move back and forth up and down, and the moving plate 147 moves through the slider inside the moving plate 147 to contact the thread on the surface of the threaded rod 148, so that the threaded rod 148 can rotate, and the rotation of the threaded rod 148 drives the brush plate 149 to rotate, so as to remove it in time to avoid affecting the stability of the reaction process.

[0038] A purification process for propylene oxide recovery and purification equipment comprises the following steps:

[0039] Step 1: When performing propylene oxide purification, a mixed liquid containing propylene oxide is added to the interior of the purification tank 1. At this time, the motor 4 is started and drives the rotating shaft 5 to rotate, and the rotation of the rotating shaft 5 drives the cross plate 6 to rotate;

[0040] Step 2: The cross plate 6 rotates to drive 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 interior of the cooling tower 3 through the guide pipe 2;

[0041] Step 3: During purification, the cross plate 6 rotates to drive the gear ring 8 to rotate. The rotation of the gear ring 8 drives the gear 16 to rotate through the meshing of the teeth. The rotation of the gear 16 drives the reciprocating screw 13 to rotate. The rotation of the reciprocating screw 13 drives the connecting plate 12 to move up and down through the threaded groove on the surface. The movement of the connecting plate 12 drives the hollow cylinder 10 to move;

[0042] Step 4: When the hollow tube 10 moves upward to the top, the vent of the hollow tube 10 will overlap with the exhaust port of the sleeve 9, so that the gas inside the purification tank 1 can be discharged through the hollow tube 10.

[0043] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, the adsorption mechanism 15 includes a second fixed rod 151, which is fixedly connected to the inner wall of the movable plate 147, and the circumferential surface of the second fixed rod 151 is fixedly connected to an activated carbon plate 152, and the top of the activated carbon plate 152 is fixedly connected to a support plate 153, and the top of the support plate 153 is fixedly connected to a protrusion 154, and the bottom of the filter plate 141 is fixedly connected to a chamfered block 155, and the inner wall of the chamfered block 155 is rotatably connected to an elastic telescopic plate 156 through a torsion spring, and the inner wall of the telescopic end of the elastic telescopic plate 156 is rotatably connected to a transmission wheel 157, and the bottom of the filter plate 141 is fixedly connected to a baffle 158.

[0044] During heating, the movable plate 147 moves to drive the fixed rod 2 151 to move, and the fixed rod 2 151 moves to drive 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 adsorbing moisture in propylene oxide, thereby improving the purification effect of propylene oxide, and can also adsorb other gases generated during the heating process of propylene oxide to avoid releasing them into the air and causing air pollution.

[0045] The left side of the baffle 158 contacts the right side of the elastic stretch plate 156 , and the baffle 158 is used to limit the elastic stretch plate 156 . The top of the protrusion 154 contacts the circumferential surface of the transmission wheel 157 .

[0046] 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 protrusion 154 to move upward. During the movement, it contacts the transmission wheel 157 and generates an extrusion force on the transmission wheel 157, so that the transmission wheel 157 drives the elastic expansion plate 156 to rotate clockwise. During the rotation of the elastic expansion plate 156, it is stretched by the spring, so that the transmission wheel 157 moves to the left and contacts the protrusion 154. When in contact, it generates an extrusion force on the transmission wheel 157, so that the transmission wheel 157 The elastic expansion plate 156 is driven to rotate clockwise again. When the transmission wheel 157 passes over the protrusion 154, the elastic expansion 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, thereby increasing the contact opportunity between the gas molecules and the activated carbon plate 152, improving the adsorption efficiency of the activated carbon plate 152, and reducing the accumulation of particles inside the activated carbon plate 152. The activated carbon particles can maintain a better dispersion state, ensuring that the gas can pass through the activated carbon layer evenly.

[0047] The overall working principle: when heating, the movable plate 147 moves to drive the fixed rod 2 151 to move, and the fixed rod 2 151 moves to drive the activated carbon plate 152 to move, which can improve the adsorption effect of the filter plate 141 and avoid release into the air to cause air pollution. 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, thereby increasing the contact opportunity between the gas molecules and the activated carbon plate 152 and improving the adsorption efficiency of the activated carbon plate 152.

[0048] The present invention provides a propylene oxide recovery and purification apparatus and process. 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. A propylene oxide recovery and purification device, comprising a purification tank (1), characterized in that: The top of the purification tank (1) is fixedly connected to a guide pipe (2), the right side of the guide pipe (2) is fixedly connected to a cooling tower (3), the bottom of the purification tank (1) is fixedly connected to a motor (4), the output end of the motor (4) is fixedly connected to a rotating shaft (5), the circumferential surface of the rotating shaft (5) is fixedly connected to a cross plate (6), the inner wall of the cross plate (6) is fixedly connected to a heating rod (7), the top of the cross plate (6) is fixedly connected to a gear ring (8), the top of the purification tank (1) is fixedly connected to a sleeve (9), the sleeve (9 ) is slidably connected to the inner wall of a hollow cylinder (10), the inner wall of the purification tank (1) is fixedly connected to a fixing rod (11) via a spring, the inner wall of the hollow cylinder (10) is fixedly connected to a connecting plate (12), the inner wall of the connecting plate (12) is movably connected to a reciprocating 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 screw (13) is fixedly connected to a gear (16); 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 gear ring (8) is meshed 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 fixed rod (11), and the fixed rod (11) is used to provide downward power for the hollow cylinder (10); 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 to the medicine barrel (142), the bottom of the medicine barrel (142) is fixedly connected to the flow pipe (143), and the circumferential surface of the reciprocating 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 to a straight plate (145), the inner wall of the L-shaped plate (144) is fixedly connected to a throttle plate (146), the circumferential surface of the reciprocating screw (13) is movably connected to a movable plate (147), the inner wall of the movable plate (147) is threadedly connected to a threaded rod (148), and the circumferential surface of the threaded rod (148) is fixedly connected to a brush plate (149).

2. A propylene oxide recovery and purification equipment according to claim 1, characterized in that: The inner wall of the filter plate (141) is rotatably connected to the circumferential surface of the reciprocating screw (13), and the filter plate (141) is used to filter other impurities mixed 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), and 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 condensed impurities. The right side of the flow tube (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 tube (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 screw (13) is rotatably connected to the inner wall of the straight plate (145).

3. A propylene oxide recovery and purification equipment according to claim 2, characterized in that: The adsorption mechanism (15) includes a second fixing rod (151), the second fixing rod (151) is fixedly connected to the inner wall of the movable plate (147), the circumferential surface of the second fixing rod (151) is fixedly connected to an activated carbon plate (152), the top of the activated carbon plate (152) is fixedly connected to a support plate (153), the top of the support plate (153) is fixedly connected to a protrusion (154), and the bottom of the filter plate (141) is fixedly connected to a chamfered block (155).

4. A propylene oxide recovery and purification equipment according to claim 3, characterized in that: The inner wall of the chamfered block (155) is rotatably connected to an elastic telescopic plate (156) via a torsion spring, the inner wall of the telescopic end of the elastic telescopic plate (156) is rotatably connected to a transmission wheel (157), and the bottom of the filter plate (141) is fixedly connected to a baffle (158).

5. A propylene oxide recovery and purification equipment according to claim 4, characterized in that: The left side of the baffle (158) contacts 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 protrusion (154) contacts the circumferential surface of the transmission wheel (157).

6. A purification process for a propylene oxide recovery and purification device, using the propylene oxide recovery and purification device according to claim 5, characterized in that: The following steps are involved: Step 1: When performing propylene oxide purification, a mixed liquid containing propylene oxide is added to the interior of the purification tank (1), and at this time, the motor (4) is started and drives the rotating shaft (5) to rotate, and the rotation of the rotating shaft (5) drives the cross plate (6) to rotate; Step 2: The cross plate (6) rotates to drive the heating rod (7) to rotate, and the heating rod (7) heats the mixed liquid to 35 degrees. At this time, the propylene oxide inside the purification tank (1) will vaporize and enter the interior of the cooling tower (3) through the guide pipe (2); Step 3: During purification, the cross plate (6) rotates to drive the gear ring (8) to rotate, and the gear ring (8) rotates to drive the gear (16) to rotate through the meshing of the teeth, and the gear (16) rotates to drive the reciprocating screw (13) to rotate, and the reciprocating screw (13) rotates through the thread groove opened on the surface to drive the connecting plate (12) to move up and down, and 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 overlap 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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