Efficient treatment device for removing impurities from raw material lime of propylene oxide

Abstract

The application discloses a kind of high-efficiency digestion of epoxy propane raw material lime removal of impurities processing device, belong to lime digestion technical field, including: digester, the digester top is equipped with the lime feed inlet for conveying lime block, the digester top axial center is rotationally installed with main shaft by driving element, this epoxy propane raw material lime high-efficiency digestion removal of impurities processing device is provided with stirring frame rotation can drive filter plate to rotate, filter plate can filter the impurities in lime water when rotating, while stirring frame rotates, can be guided block on corrugated slide rail sliding by guide frame and guide rod, guided block can drive filter plate reciprocating sliding in stirring frame on corrugated slide rail sliding by the cooperation of guide frame and guide rod, filter plate reciprocating sliding can increase the filtration area of impurities, while filter plate reciprocating movement can flush away the lime adhered to surface, facilitate lime can be removed during digestion reaction, improve the purity after lime reaction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lime digestion, in particular to a high-efficiency lime digestion and impurity removal device for propylene oxide raw material. BACKGROUND

[0002] Propylene oxide is an extremely important organic compound raw material and is widely used in the chemical industry. In its production process, lime is one of the commonly used raw materials, and its digestion and impurity removal treatment is crucial. Traditional lime digestion devices, such as adding quicklime into a mixer and stirring with water, not only produce a large amount of dust-laden high-temperature steam during stirring, which threatens the safety of workers and causes thermal pollution, but also has low digestion efficiency. Some old lime digesters, like double-shaft spiral humidifiers, have problems such as dust and steam pollution of the environment due to continuous digestion on the belt after water addition, easy jamming or slurry formation due to improper water addition, and frequent cleaning of the dust removal equipment due to easy clogging. Moreover, existing lime milk slag removal devices have poor slag removal effect and are difficult to remove small particle impurities, affecting the quality of lime milk. In the production process of propylene oxide, if the lime digestion is not sufficient and the impurities are not effectively removed, it will interfere with the reaction process, reduce the yield and quality of propylene oxide, and may also cause equipment blockage, corrosion and other faults, increasing production cost and maintenance difficulty.

[0003] According to the requirements of the "Guidance Catalogue for Industrial Structure Adjustment (2024 Edition)", the production of waste residue per propylene oxide product by the chlorohydrination method should not exceed 100 kg, which puts forward stricter standards for raw material treatment. Currently, improving the calcium hydroxide content and reducing the impurity content in the raw material by powdering and screening during use has become an important research direction to meet the basic requirements of the state for the preparation of propylene oxide by the chlorohydrination method. Therefore, there is an urgent need for a high-efficiency lime digestion and impurity removal device for propylene oxide raw material to improve the digestion efficiency of lime and effectively remove impurities, ensuring the efficient and stable production of propylene oxide. SUMMARY

[0004] The present application aims to provide a high-efficiency lime digestion and impurity removal device for propylene oxide raw material, which can collect metal impurities in lime powder by magnetic absorption through the magnetic material of the shovel plate when the lime block is scooped up, and can filter and collect non-metallic materials through the filter plate when the stirring frame rotates, thereby improving the digestion efficiency of lime.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a propylene oxide raw material lime efficient digestion and impurity removal treatment device, comprising: a digester, the top of the digester is provided with a lime feeding port for conveying lime blocks, the top of the digester is rotationally installed with a main shaft at the axial center of the digester by a driving member, the outer surface of the main shaft is fixedly installed with a stirring frame, the inner side of the digester is installed with a crushing assembly, the digester is installed with a dust treatment assembly, the stirring frame is installed with an impurity filtering assembly;

[0006] The crushing assembly comprises a conical grinding plate, a grinding roller, a crushing roller and a shovel plate, the inner side of the digester is fixedly installed with a conical grinding plate, every two grinding rollers and three crushing rollers are arranged at equal distances from the axial center to form a group and are symmetrically arranged on the outer surface of the upper part of the main shaft, the outer surface of the main shaft is axially slidably installed with a shovel plate, the rotation of the main shaft can drive the crushing roller and the grinding roller to crush and grind the lime blocks on the conical grinding plate, and the rotation of the main shaft can drive the shovel plate to shovel the lime powder adhered to the conical grinding plate;

[0007] The dust treatment assembly comprises an upper dust suction pipe and a dust inlet, the upper dust suction pipe is installed on the outer surface of the digester close to the lime feeding port, the dust suction port of the upper dust suction pipe penetrates through the outer surface of the digester and is located in the interior of the digester, and the top of the stirring frame is installed with a dust inlet, the upper dust suction pipe can collect the dust generated during crushing, and the dust inlet can collect the high-temperature steam and dust generated during the reaction of lime;

[0008] The impurity filtering assembly comprises a filter plate, the filter plate is movably installed on the stirring frame, and the rotation of the stirring frame can drive the filter plate to collect the impurities in the digester.

[0009] Preferably, the crushing assembly further comprises a discharge port and a fixed rod, the axial center of the conical grinding plate is installed with a discharge port, and the axial center of each group of grinding rollers and crushing rollers is penetratively installed with a fixed rod, one end of the fixed rod is fixedly installed on the outer surface of the main shaft;

[0010] The grinding roller and the crushing roller are circular truncated cone-shaped, the diameters of the grinding roller and the crushing roller are sequentially reduced, the rotation of the main shaft can drive the fixed rod to rotate, the rotation of the fixed rod can drive the grinding roller and the crushing roller on the surface to roll on the conical grinding plate to crush and grind the lime, and the crushed lime falls into the digester through the discharge port for digestion reaction.

[0011] Preferably, the crushing assembly further comprises a guide ring and a protruding block, the two ends of the shovel plate are fixedly installed with protruding blocks, the protruding blocks are movably connected in the sliding groove of the guide ring, the sliding groove is provided with a smooth part and a protruding part, and the guide ring is rotationally installed in the assembly groove on the inner side of the digester;

[0012] The shovel plate rotation can drive the protruding block to slide in the sliding groove of the guide ring, the protruding block can shovel the lime powder when sliding in the smooth part, the protruding block can drive the shovel plate to vertically slide on the main shaft when sliding in the protruding part, the vertical sliding of the shovel plate can avoid the shoveling of the lime powder, the shovel plate is provided with a magnet, and the magnet on the surface of the shovel plate can adsorb the metal impurities after the lime powder is crushed.

[0013] Preferably, the crushing assembly further comprises an annular rack, a gear and a tooth block, the bottom end of the guide ring is fixedly installed with the annular rack, the inner side of the digester is rotatably installed with the gear matched with the annular rack through the assembly groove, and the end of the fixed rod is installed with the tooth block matched with the gear.

[0014] The rotation of the fixed rod can drive the tooth block to push the gear to mesh and rotate, the gear meshing and rotating can drive the guide ring to rotate through the annular rack, and the rotation of the guide ring can adjust the position of the protruding part of the sliding groove.

[0015] Preferably, the dust treatment assembly further comprises a liquid equalizing tank, an air pump, a lower dust suction pipe, a first sleeve ring and a conveying groove, the outer surface of the digester is installed with the liquid equalizing tank, the outer surface of the liquid equalizing tank is fixedly installed with two air pumps in an annular array, one input end of the air pump is connected with the upper dust suction pipe, the other input end of the air pump is connected with one end of the lower dust suction pipe, and the output ends of the two air pumps are connected with the upper part of the liquid equalizing tank.

[0016] The other end of the lower dust suction pipe is fixedly installed with the first sleeve ring, the inner side of the first sleeve ring is rotatably installed at the end of the main shaft through a sealing bearing, the inner side of the main shaft and the stirring frame is provided with a conveying groove, the conveying groove of the main shaft is in communication with the conveying groove of the stirring frame, the conveying groove of the main shaft is in communication with the first sleeve ring and the lower dust suction pipe, and the conveying groove of the stirring frame is in communication with the dust inlet.

[0017] Preferably, the dust treatment assembly further comprises a conveying pipe, a second sleeve ring, a spraying pipe and a spray head, the bottom of the liquid equalizing tank is installed with the conveying pipe, the other end of the conveying pipe penetrates the end of the main shaft and is connected to the inside of the conveying groove through a sealing bearing, the outer surface of the other end of the conveying pipe is rotatably installed with the second sleeve ring through a sealing bearing, the outer surface of the second sleeve ring is installed with the spraying pipe, and the spraying pipe is in communication with the conveying pipe through the second sleeve ring.

[0018] The other end of the spraying pipe is installed in the conveying groove of the stirring frame, the outer surface of the spraying pipe is installed with the spray head, and one end of the spray head penetrates the conveying groove and is connected to the outside of the stirring frame.

[0019] Preferably, the impurity filtering assembly further comprises connecting rods, a guide frame, guide rods, guide blocks and corrugated slides, the adjacent filter plates are fixedly connected through the connecting rods, the outer surface of the stirring frame is sleeved with the guide frame, the two sides of the guide frame are fixedly installed with the guide rods, one end of one of the guide rods is connected with the filter plate, and one end of the other guide rod is fixedly installed with the guide block.

[0020] The guide block is movably installed in the corrugated slide, and the corrugated slide is fixedly installed on the inner wall of the digester.

[0021] Preferably, the impurity filtering assembly further comprises a cleaning plate, a moving ring and a spring, the outer surface of the guide rod close to the guide block is sleeved with the moving ring, the spring is fixedly installed between the moving ring and the guide frame, the surface of the moving ring is fixedly installed with the cleaning plate, the cleaning plate is triangular, and the vertical surface and the horizontal surface of the cleaning plate are respectively attached to the inner wall of the digester and the surface of the corrugated slide.

[0022] Compared with the prior art, the epoxy propane raw material lime efficient digestion and impurity removal treatment device has the advantages that:

[0023] 1. The filter plate can be driven to rotate when the stirring frame rotates, the impurities in the lime water can be filtered when the filter plate rotates, the guide block can slide on the corrugated slide through the guide frame and the guide rod when the stirring frame rotates, the filter plate can reciprocate in the stirring frame through the cooperation of the guide frame and the guide rod when the guide block slides on the corrugated slide, the filtering area of the impurities can be increased when the filter plate reciprocates, and the surface adhered lime can be dispersed when the filter plate reciprocates, so that the impurities can be removed during the digestion reaction of the lime, and the purity of the lime after the reaction is improved.

[0024] 2. The shovel plate can be moved on the conical grinding plate when the main shaft rotates, the shovel plate can shovel up the lime when moving, and the magnet on the surface of the shovel plate can magnetically attract the metal impurities remaining in the lime after the lime is crushed, so that the purity of the lime after the reaction can be improved.

[0025] 3. The grinding roller and the crushing roller are provided, the crushing roller can crush the lime block, and the grinding roller can grind the crushed lime block, so that the crushing effect of the lime block can be improved, the lime powder adhered to the conical grinding plate can be shoveled up by the shovel plate when the shovel plate rotates after the lime is crushed, and the lime powder can slide down to the inside of the digester through the inclined surface of the conical grinding plate, so that the crushing efficiency of the lime is improved.

[0026] 4. When the lime falls on the conical grinding plate for crushing and grinding, dust is generated, at this time, the dust suction pipe works can collect the floating dust through the dust suction port, avoid the waste of resources and environmental pollution caused by the floating dust, at the same time, the lime powder will generate high temperature when reacting with water, high temperature will generate bubbles and steam, the bubbles will have dust floating out when breaking, the steam and dust will have suction force after entering the dust inlet, the steam and dust can be collected after the steam and dust are collected, which can avoid the floating of the lime to the crushing area, and the stirring frame rotates to drive the dust inlet to rotate, thereby increasing the dust suction range of the dust inlet, facilitating the dust after the lime is crushed and the dust during the reaction to be separated for processing, avoiding the interference between the dust. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the three-dimensional structure schematic diagram of the present application;

[0028] Figure 2 is the front view structure schematic diagram of the present application;

[0029] Figure 3 is the three-dimensional sectional structure schematic diagram of the present application;

[0030] Figure 4 is the local enlarged structure schematic diagram of the present application;

[0031] Figure 5 is the three-dimensional explosion structure schematic diagram of the crushing assembly of the present application;

[0032] Figure 6 is the local enlarged structure schematic diagram of the present application Figure 3 A part;

[0033] Figure 7 is the local enlarged structure schematic diagram of the present application Figure 3 B part.

[0034] In the figure: 100, digester;

[0035] 200, lime feeding port;

[0036] 300, main shaft;

[0037] 400, stirring frame;

[0038] 500, crushing assembly; 510, conical grinding plate; 511, discharge port; 512, fixed rod; 513, grinding roller; 514, crushing roller; 520, shovel plate; 521, guide ring; 522, ring gear; 523, gear; 524, tooth block; 525, protrusion;

[0039] 600, dust treatment assembly; 610, liquid equalizing tank; 611, air pump; 612, upper dust suction pipe; 613, lower dust suction pipe; 614, first ring; 615, conveying groove; 616, dust inlet; 620, conveying pipe; 621, second ring; 622, spraying pipe; 623, spray head;

[0040] 700, impurity filtering assembly; 710, filter plate; 711, connecting rod; 712, guide frame; 713, guide rod; 714, guide block; 715, corrugated slide rail; 720, cleaning plate; 721, moving ring; 722, spring. DETAILED DESCRIPTION

[0041] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work should fall within the protection scope of the present application.

[0042] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or vehicle including a series of steps or units does not necessarily limit to those clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or vehicles.

[0043] In addition, the terms "mount", "set", "provided with", "connected", "linked", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For persons skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Please refer to Figures 1-7The application provides an embodiment of an efficient lime digestion and impurity removal device for propylene oxide raw material, which comprises a digester 100, a lime feeding port 200 for feeding lime blocks is arranged on the top of the digester 100, a main shaft 300 is rotatably arranged on the top of the digester 100 through a driving part, the outer surface of the main shaft 300 is fixedly provided with a stirring frame 400, a crushing assembly 500 is arranged on the inner side of the upper part of the digester 100, a dust treatment assembly 600 is arranged on the digester 100, and an impurity filtering assembly 700 is arranged on the stirring frame 400.

[0045] It should be noted that the lime blocks can fall into the crushing assembly 500 through the lime feeding port 200, the crushing assembly 500 can crush the lime blocks through the rotation of the main shaft 300, the crushed lime blocks can fall into the water in the digester 100 to perform a digestion reaction, the stirring frame 400 can be rotated through the rotation of the main shaft 300, the stirring frame 400 can stir the water and lime powder to accelerate the digestion reaction, the lime powder can float during crushing and digestion, the dust treatment assembly 600 can collect the lime powder, and the impurity filtering assembly 700 can filter the impurities in the lime water during the stirring of the lime water by the stirring frame 400.

[0046] As shown in Figures 1-6 The crushing assembly 500 comprises a conical grinding plate 510, a grinding roller 513, a crushing roller 514 and a shovel plate 520, the conical grinding plate 510 is fixedly arranged on the inner side of the upper part of the digester 100, every two grinding rollers 513 and three crushing rollers 514 are arranged at equal distances from the shaft center to form a group and are symmetrically arranged on the upper outer surface of the main shaft 300, the shovel plate 520 is slidably arranged on the outer surface of the main shaft 300 in the axial direction, the rotation of the main shaft 300 can drive the crushing roller 514 and the grinding roller 513 to crush and grind the lime blocks on the conical grinding plate 510, and the rotation of the main shaft 300 can drive the shovel plate 520 to shovel the lime powder adhered to the conical grinding plate 510.

[0047] It is conceivable that the lime blocks can fall into the crushing area on the conical grinding plate 510 through the lime feeding port 200, at this time, the rotation of the main shaft 300 can drive the grinding roller 513 and the crushing roller 514 to roll on the conical grinding plate 510 through the parts, and drive the shovel plate 520 to rotate, the crushing roller 514 can crush the lime blocks when rolling, the shovel plate 520 can shovel the crushed lime and slide downward along the inclined surface of the conical grinding plate 510 to the grinding area where the grinding roller 513 is located, at this time, the grinding roller 513 can grind the crushed lime blocks into lime powder, and the shovel plate 520 can shovel the lime powder adhered to the conical grinding plate 510, and the lime powder can slide into the interior of the digester 100 through the inclined surface of the conical grinding plate 510 after being shoveled.

[0048] As shown in Figures 1-4、 Figure 6 and Figure 7 As shown in

[0049] It is worth noting that the lime falls on the conical grinding plate 510 to be crushed and ground, at which time the upper dust suction pipe 612 works to collect the dust floating in the air, avoiding the waste of resources and environmental pollution caused by the floating dust. At the same time, the lime powder reacts with water to produce high temperature, which produces bubbles and steam. The bubbles will have dust floating out when they burst. The steam and dust will be collected by the suction of the dust inlet 616 after floating out. The steam and dust can avoid floating into the crushing area to cause the lime to be wet. The stirring frame 400 rotates to drive the dust inlet 616 to rotate, thereby increasing the dust collection range of the dust inlet 616.

[0050] As shown in Figures 1-4 、 Figure 6 and Figure 7 The impurity filtering assembly 700 includes a filter plate 710, which is movably installed on the stirring frame 400. The stirring frame 400 rotates to drive the filter plate 710 to collect impurities in the digestor 100.

[0051] It can be understood that the stirring frame 400 rotates to drive the filter plate 710 to rotate, which can filter the impurities in the lime water, thereby improving the purity of the lime reaction.

[0052] As shown in Figures 1-6 The crushing assembly 500 further includes a discharge port 511 and a fixed rod 512. The conical grinding plate 510 is installed at the axial center of each set of grinding rollers 513 and crushing rollers 514. The fixed rod 512 is installed at the axial center of each set of grinding rollers 513 and crushing rollers 514. One end of the fixed rod 512 is fixedly installed on the outer surface of the main shaft 300. The grinding rollers 513 and the crushing rollers 514 are circular truncated cones. The diameters of the grinding rollers 513 and the crushing rollers 514 decrease in turn. The main shaft 300 rotates to drive the fixed rod 512 to rotate, which drives the grinding rollers 513 and the crushing rollers 514 on the surface to roll on the conical grinding plate 510 to crush and grind the lime, and then fall into the digestor 100 through the discharge port 511 for digestion reaction.

[0053] It is contemplated that the main shaft 300 rotates and drives the fixed rod 512 to rotate, and the fixed rod 512 drives the surface grinding roller 513 and the crushing roller 514 to crush and grind the lime block. After the lime block is crushed and ground, it slides down the inclined surface of the conical grinding plate 510 to the inside of the discharge port 511, and then falls into the reaction water in the digester 100 for digestion reaction. It should be noted that the bottom end of the discharge port 511 is lower than the top end of the dust inlet 616, so that the dust inlet 616 can avoid sucking the lime powder falling from the discharge port 511.

[0054] As shown in Figures 1-6 , the crushing assembly 500 further comprises a guide ring 521 and a protrusion 525. The two ends of the shovel plate 520 are fixedly installed with the protrusion 525, and the protrusion 525 is movably connected in the sliding groove of the guide ring 521. The sliding groove is provided with a smooth part and a protruding part. The guide ring 521 is rotatably installed in the assembly groove on the inside of the digester 100. The rotation of the shovel plate 520 drives the protrusion 525 to slide in the sliding groove of the guide ring 521. When the protrusion 525 slides in the smooth part, the lime powder can be scooped up. When the protrusion 525 is in the protruding part, the shovel plate 520 can slide vertically on the main shaft 300. The vertical sliding of the shovel plate 520 can avoid the scooped lime powder. The shovel plate 520 is provided with a magnet, and the rotation of the shovel plate 520 can adsorb the metal impurities in the crushed lime powder through the magnet on the surface.

[0055] It should be noted that the main shaft 300 rotates and drives the shovel plate 520 to rotate. When the shovel plate 520 rotates, the end protrusion 525 can slide in the sliding groove of the guide ring 521. When the protrusion 525 slides in the smooth part of the sliding groove, the bottom of the shovel plate 520 is attached to the upper surface of the conical grinding plate 510 to scoop up the crushed or ground lime. After the lime is scooped up, it slides down the inclined surface of the conical grinding plate 510 and accumulates. When the protrusion 525 slides to the protruding part of the sliding groove, it can drive the shovel plate 520 to move upward. When the shovel plate 520 moves upward, it can slide axially on the surface of the main shaft 300. At the same time, the shovel plate 520 moves upward and passes the position of the lime accumulation. After the shovel plate 520 passes the position of the lime accumulation, the grinding roller 513 and the crushing roller 514 continue to process the accumulated lime. When the shovel plate 520 slides to the smooth part of the sliding groove, it can continue to scoop up the lime. When the shovel plate 520 scoops up the lime powder, the magnet adsorbs the metal impurities in the crushed lime powder, so that the purity of the lime can be improved during the reaction.

[0056] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the pulverizing assembly 500 further comprises an annular rack 522, a gear 523 and a tooth block 524, the bottom end of the guide ring 521 is fixedly installed with the annular rack 522, the inner side of the digester 100 is rotatably installed with the gear 523 matched with the annular rack 522 through an assembly groove, the end of the fixed rod 512 is installed with the tooth block 524 matched with the gear 523, the rotation of the fixed rod 512 can drive the tooth block 524 to push the gear 523 to mesh and rotate, the gear 523 can drive the guide ring 521 to rotate through the annular rack 522 when meshing and rotating, and the guide ring 521 can adjust the position of the slide groove protruding part when rotating;

[0057] It is conceivable that the rotation of the fixed rod 512 will drive the end tooth block 524 to rotate, when the tooth block 524 rotates to the side of the gear 523, the tooth block 524 will push the gear 523 to mesh and rotate, the gear 523 can drive the annular rack 522 to rotate when meshing and rotating, the annular rack 522 can drive the guide ring 521 to rotate in the assembly groove of the digester 100 when rotating, and the guide ring 521 can adjust the position of the slide groove smooth part and the protruding part when rotating, so that the shovel plate 520 can avoid always piling up lime at one position, causing the lime at the position to be always pulverized and ground and unable to fall into the interior of the digester 100.

[0058] As shown in the Figures 1-7 dust treatment assembly 600 further comprises a liquid equalizing tank 610, an air pump 611, a lower dust suction pipe 613, a first ring 614 and a conveying groove 615, the outer surface of the digester 100 is installed with the liquid equalizing tank 610, the outer surface of the liquid equalizing tank 610 is fixedly installed with two air pumps 611 in an annular array, one end of the lower dust suction pipe 613 is connected to the input end of the other air pump 611, the output ends of the two air pumps 611 are connected to the upper part of the liquid equalizing tank 610, the other end of the lower dust suction pipe 613 is fixedly installed with the first ring 614, the inner side of the first ring 614 is rotatably installed at the end of the main shaft 300 through a sealing bearing, the inner sides of the main shaft 300 and the stirring frame 400 are both provided with the conveying groove 615, the conveying groove 615 of the main shaft 300 is in communication with the conveying groove 615 of the stirring frame 400, the conveying groove 615 of the main shaft 300 is in communication with the first ring 614 and the lower dust suction pipe 613, and the conveying groove 615 of the stirring frame 400 is in communication with the dust inlet 616;

[0059] It is worth noting that the air pump 611 can collect the dust generated during the grinding process through the upper dust suction pipe 612. The dust is collected and discharged into the interior of the liquid equalizing tank 610. The steam and dust enter the conveying groove 615 through the dust inlet 616 while the air pump 611 is working. The steam and dust are then conveyed to the lower dust suction pipe 613 by the conveying groove 615. Finally, the lower dust suction pipe 613 conveys the steam and dust to the interior of the liquid equalizing tank 610 through the air pump 611. The dust reacts with water when it enters the interior of the liquid equalizing tank 610. When the temperature of the liquid equalizing tank 610 is the same as the temperature inside the digester 100, the lime water in the liquid equalizing tank 610 is discharged into the digester 100 again for further digestion. The first ring 614 rotates with the sealing bearing when the main shaft 300 rotates. The first ring 614 conveys the steam and dust in the conveying groove 615 to the lower dust suction pipe 613 through the through groove formed therein.

[0060] As shown in Figures 1-4 , Figure 6 and Figure 7 , the dust treatment assembly 600 further comprises a conveying pipe 620, a second ring 621, a spraying pipe 622, and a spray head 623. The conveying pipe 620 is installed at the bottom of the liquid equalizing tank 610. The other end of the conveying pipe 620 penetrates the end of the main shaft 300 through a sealing bearing and is connected to the interior of the conveying groove 615. The outer surface of the other end of the conveying pipe 620 is rotatably installed with the second ring 621 through a sealing bearing. The outer surface of the second ring 621 is installed with the spraying pipe 622. The spraying pipe 622 is connected to the conveying pipe 620 through the second ring 621. The other end of the spraying pipe 622 is installed in the conveying groove 615 of the stirring frame 400. The outer surface of the spraying pipe 622 is installed with the spray head 623. One end of the spray head 623 penetrates the conveying groove 615 and is connected to the outside of the stirring frame 400.

[0061] It can be understood that when the temperature of the lime water in the liquid equalizing tank 610 is the same as the temperature of the lime water inside the digester 100, the lime water in the liquid equalizing tank 610 can be conveyed to the interior of the spraying pipe 622 through the conveying pipe 620. The lime water in the spraying pipe 622 is sprayed onto the inner wall of the digester 100 by the spray head 623. The lime powder adhered to the inner wall of the digester 100 is dispersed by the lime water during the spraying process.

[0062] As shown in Figures 1-4 , Figure 6 and Figure 7As shown in the figure, the impurity filtering assembly 700 further comprises connecting rods 711, a guide frame 712, guide rods 713, guide blocks 714 and corrugated sliding rails 715, the adjacent filter plates 710 are fixedly connected through the connecting rods 711, the outer surface of the stirring frame 400 is sleeved with the guide frame 712, the two sides of the guide frame 712 are fixedly installed with the guide rods 713, one end of one of the guide rods 713 is connected with the filter plate 710, one end of the other guide rod 713 is fixedly installed with the guide block 714, the guide block 714 is movably installed in the inside of the corrugated sliding rail 715, and the corrugated sliding rail 715 is fixedly installed on the inner wall of the digester 100.

[0063] It is conceived that when the stirring frame 400 rotates, the guide block 714 can be driven to slide on the corrugated sliding rail 715 through the guide frame 712 and the guide rods 713, and when the guide block 714 slides, it can follow the corrugated shape of the corrugated sliding rail 715 to approach and move away from the stirring frame 400, and when the guide block 714 approaches and moves away from the stirring frame 400, it can push the guide frame 712 to reciprocally slide on the surface of the stirring frame 400 through the guide rod 713, and when the guide frame 712 slides, it can drive the guide rod 713 on the other side to push the filter plate 710, and when the filter plate 710 is pushed, it can push the remaining filter plates 710 to reciprocally slide in the stirring frame 400 through the connecting rods 711, and when the filter plates 710 reciprocally slide, the filtering area of the impurities can be increased, and meanwhile, when the filter plates 710 reciprocally move, the adhered lime on the surface can be scattered.

[0064] As shown in the figure, Figures 1-4 , Figure 7 The impurity filtering assembly 700 further comprises cleaning plates 720, moving rings 721 and springs 722, the outer surface of the guide rod 713 close to the guide block 714 is sleeved with the moving ring 721, the moving ring 721 and the guide frame 712 are fixedly installed with the spring 722, and the surface of the moving ring 721 is fixedly installed with the cleaning plate 720, the cleaning plate 720 is triangular, and the vertical surface and the horizontal surface of the cleaning plate 720 are respectively attached to the inner wall of the digester 100 and the surface of the corrugated sliding rail 715.

[0065] It should be noted that when the guide rod 713 rotates, the cleaning plate 720 can be driven to slide along the inner wall of the digester 100 and the surface of the corrugated sliding rail 715 through the moving ring 721, and when the cleaning plate 720 slides, the lime falling on the corrugated sliding rail 715 can be cleaned, and meanwhile, when the guide rod 713 moves away from or approaches the corrugated sliding rail 715, the moving ring 721 can always keep the cleaning plate 720 attached to the inner wall of the digester 100 through the elastic force of the spring 722.

[0066] The above merely describes preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical scope disclosed by the present application and according to the technical solutions and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. An efficient impurity removal treatment device for propylene oxide raw material lime, comprising: The utility model provides a digestion device, the digestion device top is equipped with lime feeding port for conveying lime block, the digestion device top axial center is rotationally installed with main shaft through driving piece, the outer surface of main shaft is fixedly installed with stirring frame, its characterized in be equipped with crushing assembly on the inside upper portion of digestion device, be equipped with dust treatment assembly on digestion device, be equipped with impurity filtering assembly on stirring frame, The crushing assembly includes a conical grinding plate, grinding rollers, crushing rollers, and a shovel plate. The inside upper portion of the digestion device is fixedly installed with the conical grinding plate. Every two grinding rollers and three crushing rollers are arranged in a group at equal distances from the axial center and are symmetrically arranged on the outer surface of the upper portion of the main shaft. The outer surface of the main shaft is axially slidably installed with the shovel plate. The rotation of the main shaft can drive the crushing rollers and the grinding rollers to crush and grind the lime blocks on the conical grinding plate. The rotation of the main shaft can drive the shovel plate to shovel the lime powder adhered to the conical grinding plate. The dust treatment assembly includes an upper dust suction pipe and a dust inlet. The upper dust suction pipe is installed on the outer surface of the digestion device near the lime feeding port. The dust suction port of the upper dust suction pipe penetrates through the outer surface of the digestion device and is located in the interior of the digestion device. The top of the stirring frame is installed with the dust inlet. The upper dust suction pipe can collect the dust generated during crushing. The dust inlet can collect the high-temperature steam and dust generated during the reaction of lime. The impurity filtering assembly includes a filter plate. The filter plate is movably installed on the stirring frame. The rotation of the stirring frame can drive the filter plate to collect the impurities in the digestion device.

2. The device for efficient digestion and impurity removal of raw lime for propylene oxide according to claim 1, characterized in that: The crushing assembly further includes a discharge port and a fixed rod. The axial center of the conical grinding plate is installed with the discharge port. The axial center of each group of grinding rollers and crushing rollers is installed with the fixed rod. One end of the fixed rod is fixedly installed on the outer surface of the main shaft. The grinding rollers and the crushing rollers are circular truncated cones. The diameters of the grinding rollers and the crushing rollers decrease in sequence. The rotation of the main shaft can drive the fixed rod to rotate. The rotation of the fixed rod can drive the grinding rollers and the crushing rollers on the surface to roll on the conical grinding plate to crush and grind the lime. The crushed lime falls into the digestion device through the discharge port for digestion reaction.

3. The device for efficient digestion and impurity removal of raw lime for propylene oxide according to claim 2, characterized in that: The crushing assembly further includes a guide ring and a protruding block. Both ends of the shovel plate are fixedly installed with the protruding block. The protruding block is movably connected in the sliding groove of the guide ring. The sliding groove is provided with a smooth part and a protruding part. The guide ring is rotationally installed in the assembly groove on the inside of the digestion device. The rotation of the shovel plate can drive the protruding block to slide in the sliding groove of the guide ring. When the protruding block slides in the smooth part, the protruding block can shovel the lime powder. When the protruding block is in the protruding part, the protruding block can drive the shovel plate to vertically slide on the main shaft. The vertical sliding of the shovel plate can avoid the shoveling of the lime powder. The shovel plate is provided with a magnet. When the shovel plate rotates, the magnet on the surface can adsorb the metal impurities after crushing the lime powder.

4. The impurity removal device for high-efficiency digestion of lime as a raw material of propylene oxide according to claim 3, characterized in that: The crushing assembly further includes an annular rack, a gear, and a tooth block. The bottom end of the guide ring is fixedly installed with the annular rack. The inside of the digestion device is rotationally installed with the gear matched with the annular rack through the assembly groove. The end of the fixed rod is installed with the tooth block matched with the gear. The fixed rod can rotate to drive the tooth block to push the gear to mesh and rotate, the gear can drive the guide ring to rotate when meshing and rotating, and the guide ring can adjust the position of the groove protruding portion when rotating.

5. The device for efficient digestion and impurity removal of raw lime for propylene oxide according to claim 1, characterized in that: The dust treatment assembly further comprises a liquid equalizing tank, air pumps, a lower dust suction pipe, a first ring, and a conveying groove, the outer surface of the digester is provided with the liquid equalizing tank, the outer surface of the liquid equalizing tank is fixedly provided with two air pumps in an annular array, one input end of one air pump is connected with the upper dust suction pipe, the other input end of the other air pump is connected with one end of the lower dust suction pipe, and the output ends of the two air pumps are connected with the upper part of the liquid equalizing tank; The other end of the lower dust suction pipe is fixedly provided with the first ring, the inner side of the first ring is rotatably connected with the end of the main shaft through a sealing bearing, the inner side of the main shaft and the inner side of the stirring frame are provided with the conveying groove, the conveying groove of the main shaft is in communication with the conveying groove of the stirring frame, the conveying groove of the main shaft is in communication with the first ring and the lower dust suction pipe, and the conveying groove of the stirring frame is in communication with the dust inlet.

6. The impurity removal device for high-efficiency digestion of lime as a raw material of propylene oxide according to claim 5, characterized in that: The dust treatment assembly further comprises a conveying pipe, a second ring, a spraying pipe, and a spray head, the bottom of the liquid equalizing tank is provided with the conveying pipe, the other end of the conveying pipe penetrates through the end of the main shaft and is connected to the inside of the conveying groove through a sealing bearing, the outer surface of the other end of the conveying pipe is rotatably provided with the second ring through a sealing bearing, the outer surface of the second ring is provided with the spraying pipe, and the spraying pipe is in communication with the conveying pipe through the second ring; The other end of the spraying pipe is arranged in the conveying groove of the stirring frame, the outer surface of the spraying pipe is provided with the spray head, and one end of the spray head penetrates through the conveying groove and is connected to the outside of the stirring frame.

7. The device for efficient digestion and impurity removal of raw lime for propylene oxide according to claim 1, characterized in that: The impurity filtering assembly further comprises a connecting rod, a guide frame, a guide rod, a guide block, and a corrugated slide rail, adjacent filter plates are fixedly connected through the connecting rod, the outer surface of the stirring frame is sleeved with the guide frame, the two sides of the guide frame are fixedly provided with the guide rods, one end of one guide rod is connected with the filter plate, and one end of the other guide rod is fixedly provided with the guide block; The guide block is movably arranged in the inside of the corrugated slide rail, and the corrugated slide rail is fixedly arranged on the inner wall of the digester.

8. The impurity removal device for high-efficiency digestion of raw lime for propylene oxide production according to claim 7, characterized in that: The impurity filtering assembly further comprises a cleaning plate, a moving ring, and a spring, the outer surface of the guide rod close to the guide block is sleeved with the moving ring, the moving ring and the guide frame are fixedly provided with the spring, the surface of the moving ring is fixedly provided with the cleaning plate, the cleaning plate is triangular, and the vertical surface and the horizontal surface of the cleaning plate are respectively attached to the inner wall of the digester and the surface of the corrugated slide rail.

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