Efficient digestion and impurity removal treatment device for epoxypropane raw material lime

Abstract

The invention discloses an efficient digestion and impurity removal treatment device for epoxypropane raw material lime, and belongs to the technical field of lime digestion, the efficient digestion and impurity removal treatment device comprises a digester, the top of the digester is provided with a lime feeding port used for conveying lime blocks, and the axial circle center of the top of the digester is rotationally provided with a main shaft through a driving part; according to the efficient digestion and impurity removal treatment device for the epoxypropane raw material lime, when the stirring frame rotates, a filter plate can be driven to rotate, when the filter plate rotates, impurities in lime water can be filtered out, and when the stirring frame rotates, a guide block can be driven to slide on a corrugated sliding rail through a guide frame and a guide rod; when the guide block slides on the corrugated slide rail, the guide frame and the guide rod are matched to drive the filter plate to slide back and forth in the stirring frame, the filter plate can increase the impurity filtering area when sliding back and forth, and meanwhile, lime adhered to the surface can be dispersed when the filter plate moves back and forth, so that the lime can be conveniently subjected to impurity removal during digestion reaction; the purity of the lime after reaction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lime digestion, in particular to a device for efficiently digesting and removing impurities from lime, a raw material of propylene oxide. Background Art

[0002] Propylene oxide, a vital organic compound raw material, is widely used in the chemical industry. Lime is a common raw material in its production, and its digestion and impurity removal are crucial. Traditional lime digestion equipment, such as adding quicklime to a mixer and mixing it with water, not only generates large amounts of dusty, high-temperature steam during mixing, posing a safety threat to workers and causing thermal pollution, but also suffers from low digestion efficiency. Other older lime digesters, such as twin-shaft spiral humidifiers, have problems with continuing digestion on the belt after adding water, causing dust and steam pollution; improper water addition can lead to jamming or muddy formation, wasting water resources; and dust removal equipment is prone to clogging, requiring frequent cleaning. Furthermore, existing lime milk deslagging equipment has poor deslagging performance and struggles to remove small impurities, impacting lime milk quality. In the propylene oxide production process, inadequate lime digestion and ineffective impurity removal can disrupt the reaction process, reduce propylene oxide yield and quality, and potentially cause equipment failures such as blockage and corrosion, increasing production costs and increasing maintenance complexity. According to the requirements of the "Guiding Catalogue for Industrial Structure Adjustment (2024 Edition)", the amount of waste residue generated by each cyclopropane product produced by the chlorohydrin process shall not exceed 100 kg, which puts forward stricter standards for raw material processing. Currently, by pulverizing and screening the raw materials when they are used, increasing the calcium hydroxide content and reducing the impurity content in the raw materials has become an important research direction to meet the basic requirements of the country for the preparation of propylene oxide by the chlorohydrin process. Therefore, there is an urgent need for an efficient digestion and impurity removal device for lime, a raw material for propylene oxide, to improve the efficiency of lime digestion, effectively remove impurities, and ensure the efficient and stable production of propylene oxide. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-efficiency digestion and impurity removal device for lime, a raw material for propylene oxide. The crushed lime blocks can be scooped up by a shovel plate. When the lime blocks are scooped up, the shovel plate can magnetically absorb and collect metal impurities in the lime powder through its own magnetic material. When the stirring frame rotates, it can drive the filter plate to filter and collect non-metallic materials, thereby improving the digestion effect of the lime.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an efficient digestion and impurity removal device for lime, a raw material for propylene oxide, comprising: a digester, a lime feed port for conveying lime blocks mounted on the top of the digester, a main shaft rotatably mounted at the axial center of the top of the digester via a driving member, a stirring frame fixedly mounted on the outer surface of the main shaft, a crushing assembly mounted on the upper inner side of the digester, a dust treatment assembly mounted on the digester, and an impurity filtering assembly mounted on the stirring frame; The crushing assembly includes a conical grinding plate, a grinding roller, a crushing roller and a shovel plate. The conical grinding plate is fixedly installed on the inner upper part of the digester. Every two grinding rollers and three crushing rollers are arranged in a group with equal distances from the axis of the grinding rollers. They are symmetrically arranged on the upper outer surface of the main shaft. The outer surface of the main shaft is axially slidably mounted 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. The rotation of the main shaft can drive the shovel plate to scoop up the lime powder adhering 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 digester near the lime feed inlet. The dust suction port of the upper dust suction pipe passes through the outer surface of the digester and is located inside the digester. The dust inlet is installed on the top of the stirring frame. The upper dust suction pipe can collect dust generated during crushing, and the dust inlet can collect high-temperature steam and dust generated during the lime reaction. The impurity filtering component includes a filter plate, which is movably mounted on a stirring frame. The rotation of the stirring frame can drive the filter plate to collect impurities in the digester.

[0005] Preferably, the crushing assembly further comprises a discharge port and a fixing rod, the discharge port being installed at the axial center of the conical grinding plate, and a fixing rod being installed through the axial center of each set of the grinding roller and the crushing roller, one end of the fixing rod being fixedly mounted on the outer surface of the main shaft; The grinding roller and the crushing roller are in the shape of a truncated cone, and the diameters of the grinding roller and the crushing roller decrease successively. The rotation of the main shaft can drive the fixed rod to rotate, and the rotation of the fixed rod will drive the grinding roller and the crushing roller on the surface to roll on the conical grinding plate to grind the lime, and then fall into the digester through the discharge port for digestion reaction.

[0006] Preferably, the crushing assembly further comprises a guide ring and a protrusion, the protrusions being fixedly mounted on both ends of the shovel plate, the protrusions being movably connected in a slide groove of the guide ring, the slide groove being provided with a smooth portion and a protrusion, and the guide ring being rotatably mounted in an assembly groove inside the digester; The rotation of the shovel plate can drive the protrusion to slide in the slide groove of the guide ring. When the protrusion slides in the smooth part, it can scoop up the lime powder. When the protrusion is in the raised part, it can drive the shovel plate to slide vertically on the main shaft. The vertical sliding of the shovel plate can avoid the scooped lime powder. A magnet is provided on the shovel plate. When the shovel plate rotates, the metal impurities after the lime is crushed can be adsorbed through the magnet on the surface.

[0007] Preferably, the crushing assembly further comprises an annular rack, a gear and a gear block, the annular rack is fixedly mounted on the bottom end of the guide ring, a gear matched with the annular rack is rotatably mounted on the inner side of the digester through an assembly groove, and a gear block matched with the gear is mounted on the end of the fixed rod; The rotation of the fixing rod can drive the tooth block to push the gear to engage and rotate. When the gear engages and rotates, it can drive the guide ring to rotate through the annular rack. When the guide ring rotates, the position of the sliding groove protrusion can be adjusted.

[0008] Preferably, the dust treatment assembly further includes a liquid balancing tank, an air pump, a lower dust suction pipe, a first ring and a conveying trough. The outer surface of the digester is provided with a liquid balancing tank, and the outer surface of the liquid balancing tank is fixedly provided with two air pumps in a ring array, wherein the input end of one of the air pumps is connected to the upper dust suction pipe, and the input end of the other air pump is connected to one end of the lower dust suction pipe, and the output ends of the two air pumps are both connected to the upper part of the liquid balancing tank; A first sleeve is fixedly installed on the other end of the lower dust suction pipe, and the inner side of the first sleeve is rotatably installed on the end of the main shaft through a sealed bearing. Conveying grooves are provided on the inner sides of the main shaft and the stirring frame. The conveying groove of the main shaft is connected with the conveying groove of the stirring frame, and the conveying groove of the main shaft is connected with the first sleeve and the lower dust suction pipe, and the conveying groove of the stirring frame is connected with the dust inlet.

[0009] Preferably, the dust handling assembly further comprises a delivery pipe, a second collar, a spray pipe and a nozzle, a delivery pipe is installed at the bottom of the liquid equalizing tank, the other end of the delivery pipe passes through the end of the main shaft through a sealed bearing and is connected to the inside of the delivery trough, the outer surface of the other end of the delivery pipe is rotatably mounted with a second collar through a sealed bearing, the outer surface of the second collar is mounted with a spray pipe, and the spray pipe is connected to the delivery pipe through the second collar; The other end of the spray pipe is installed in the conveying trough of the stirring frame. A nozzle is installed on the outer surface of the spray pipe. One end of the nozzle passes through the conveying trough and is connected to the outside of the stirring frame.

[0010] Preferably, the impurity filtering assembly further comprises a connecting rod, a guide frame, a guide rod, a guide block and a corrugated slide rail, the adjacent filter plates are fixedly connected by the connecting rod, the outer surface of the stirring frame is sleeved with a guide frame, and guide rods are fixedly installed on both sides of the guide frame, one end of one of the guide rods is connected to the filter plate, and the other end of the guide rod is fixedly installed with a guide block; The guide block is movably mounted inside the corrugated slide rail, and the corrugated slide rail is fixedly mounted on the inner wall of the digester.

[0011] Preferably, the impurity filtering assembly also includes a cleaning plate, a movable ring and a spring. The guide rod is sleeved with a movable ring on the outer surface close to the guide block. A spring is fixedly installed between the movable ring and the guide frame. A cleaning plate is fixedly installed on the surface of the movable ring. The cleaning plate is triangular, and the vertical and horizontal surfaces of the cleaning plate are respectively attached to the inner wall of the digester and the surface of the corrugated slide rail.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the propylene oxide raw material lime efficient digestion and impurity removal processing device; 1. The stirring frame is provided to drive the filter plate to rotate when it rotates, and the filter plate can filter the impurities in the lime water when it rotates. When the stirring frame rotates, the guide block can be driven to slide on the corrugated slide rail through the guide frame and the guide rod. When the guide block slides on the corrugated slide rail, the filter plate can be driven to slide back and forth in the stirring frame through the cooperation of the guide frame and the guide rod. The reciprocating sliding of the filter plate can increase the filtering area for impurities. At the same time, the reciprocating movement of the filter plate can disperse the lime adhered to the surface, which is convenient for removing impurities during the digestion reaction of the lime and improving the purity of the lime after the reaction; 2. When the main shaft rotates, it drives the shovel to move against the conical grinding plate. The shovel can scoop up the lime when it moves. When the shovel scoops up the lime powder, the magnet on the surface of the shovel can magnetically attract the metal impurities remaining inside the lime after the lime is crushed, so that the purity of the lime can be improved after the reaction; 3. It is equipped with a grinding roller and a crushing roller. The crushing roller can crush the lime blocks, while the grinding roller can grind the crushed lime blocks, thereby improving the crushing effect of the lime blocks. After the lime is crushed, the shovel plate rotates to scoop up the lime powder adhering to the conical grinding plate. After scooping up, the lime powder can slide through the inclined surface of the conical grinding plate into the interior of the digester, which is convenient for improving the crushing efficiency of the lime; 4. When lime falls onto the conical grinding plate and is crushed and ground, dust will be generated. At this time, the dust suction pipe can collect the scattered dust through the dust suction port to avoid waste of resources and environmental pollution caused by dust dispersion. At the same time, lime powder will generate high temperature when reacting with water. High temperature will generate bubbles and steam. When the bubbles burst, dust will float out. After the steam and dust float out, the dust inlet will generate suction to collect them. After the steam and dust are collected, they can be prevented from floating into the crushing area and causing the lime to become wet. In addition, when the mixing frame rotates, the dust inlet will be driven to rotate, which will increase the dust suction range of the dust inlet, making it convenient for the dust after lime crushing and the dust during the reaction to be processed separately to avoid interference between the dusts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front structural schematic diagram of the present invention; Figure 3It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of a partially enlarged structure of the present invention; Figure 5 This is a schematic diagram of the three-dimensional explosion structure of the crushing assembly of the present invention; Figure 6 This invention Figure 3 A schematic diagram of the enlarged structure of part A; Figure 7 This invention Figure 3 Enlarged structural diagram of part B.

[0014] In the figure: 100, digestive organ; 200, lime feed port; 300, spindle; 400, stirring rack; 500, crushing assembly; 510, conical grinding plate; 511, discharge port; 512, fixing rod; 513, grinding roller; 514, crushing roller; 520, shovel plate; 521, guide ring; 522, annular rack; 523, gear; 524, gear block; 525, protrusion; 600, dust handling assembly; 610, liquid averaging tank; 611, air pump; 612, upper dust suction pipe; 613, lower dust suction pipe; 614, first ring; 615, conveying trough; 616, dust inlet; 620, conveying pipe; 621, second ring; 622, spraying pipe; 623, nozzle; 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

[0015] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0016] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or vehicle that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or vehicles.

[0017] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0018] See also Figure 1-Figure 7 The present invention provides an embodiment: an efficient digestion and impurity removal device for lime, a raw material for propylene oxide, comprising: a digester 100, a lime feed port 200 for conveying lime blocks installed on the top of the digester 100, a main shaft 300 rotatably installed at the axial center of the top of the digester 100 through a driving member, a stirring frame 400 fixedly installed on the outer surface of the main shaft 300, a crushing assembly 500 installed on the upper inner side of the digester 100, a dust treatment assembly 600 installed on the digester 100, and an impurity filtering assembly 700 installed on the stirring frame 400; It should be noted that lime blocks can fall into the interior of the crushing assembly 500 through the lime feed port 200. The rotation of the main shaft 300 can drive the crushing assembly 500 to crush the lime blocks. After the lime blocks are crushed, they will fall into the water inside the digester 100 for digestion reaction. When the main shaft 300 rotates, it will drive the stirring rack 400 to rotate. When the stirring rack 400 rotates, it will stir the water and lime powder to accelerate the digestion reaction. When the lime is crushed and digested, the lime powder will float. When the lime powder floats, the dust treatment assembly 600 can collect it. When the stirring rack 400 stirs the lime water, it can filter the impurities inside the lime water through the impurity filtering assembly 700.

[0019] like Figures 1-6As shown, the crushing assembly 500 includes 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 installed on the inner upper part of the digester 100. Every two grinding rollers 513 and three crushing rollers 514 are arranged equidistantly from the axis of each group and symmetrically arranged on the upper outer surface of the main shaft 300. The shovel plate 520 is axially slidably installed on the outer surface of the main shaft 300. The rotation of the main shaft 300 can drive the crushing rollers 514 and the grinding rollers 513 to crush and grind the lime blocks on the conical grinding plate 510. The rotation of the main shaft 300 can drive the shovel plate 520 to scoop up the lime powder adhering to the conical grinding plate 510. It can be imagined that the lime blocks will fall into the crushing area on the conical grinding plate 510 through the lime feed port 200. At this time, the rotation of the main shaft 300 will drive the grinding roller 513 and the crushing roller 514 to roll on the conical grinding plate 510 through the components, and at the same time drive the shovel plate 520 to rotate. The crushing roller 514 can crush the lime blocks when rolling. When the shovel plate 520 rotates, it will scoop up the crushed lime and slide down 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. When the shovel plate 520 rotates, it will scoop up the lime powder adhered to the conical grinding plate 510. After scooping up, the lime powder can slide through the inclined surface of the conical grinding plate 510 to the inside of the digester 100.

[0020] like Figures 1-4 、 Figure 6 and Figure 7 As shown, the dust handling assembly 600 includes an upper dust suction pipe 612 and a dust inlet 616. The upper dust suction pipe 612 is installed on the outer surface of the digester 100 near the lime feed inlet 200. The dust suction port of the upper dust suction pipe 612 passes through the outer surface of the digester 100 and is located inside the digester 100. The dust inlet 616 is installed on the top of the stirring frame 400. The upper dust suction pipe 612 can collect dust generated during crushing, and the dust inlet 616 can collect high-temperature steam and dust generated during the lime reaction. It is worth noting that when lime falls onto the conical grinding plate 510 and is crushed and ground, dust will be generated. At this time, the upper dust suction pipe 612 can collect the floating dust through the dust suction port to avoid waste of resources and environmental pollution caused by dust dispersion. At the same time, lime powder will generate high temperature when reacting with water, and high temperature will generate bubbles and steam. When the bubbles burst, dust will float out. After the steam and dust float out, the dust inlet 616 will generate suction to collect them. After the steam and dust are collected, they can be prevented from floating into the crushing area and causing the lime to become wet. In addition, when the stirring rack 400 rotates, it will drive the dust inlet 616 to rotate, thereby increasing the dust suction range of the dust inlet 616.

[0021] like Figures 1-4 、 Figure 6 and Figure 7 As shown, the impurity filtering assembly 700 includes a filter plate 710, which is movably mounted on the stirring frame 400. The rotation of the stirring frame 400 can drive the filter plate 710 to collect impurities in the digester 100; It can be understood that when the stirring frame 400 rotates, the filter plate 710 can be driven to rotate. When the filter plate 710 rotates, the impurities in the lime water can be filtered out, thereby improving the purity of the lime reaction.

[0022] like Figures 1-6 As shown, the crushing assembly 500 further includes a discharge port 511 and a fixed rod 512. The discharge port 511 is installed at the axial center of the conical grinding plate 510. The fixed rod 512 is installed through 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 crushing rollers 514 are truncated cones. The diameters of the grinding rollers 513 and crushing rollers 514 decrease in sequence. The rotation of the main shaft 300 can drive the fixed rod 512 to rotate. The rotation of the fixed rod 512 will drive the grinding rollers 513 and crushing rollers 514 on the surface to roll on the conical grinding plate 510 to crush and grind the lime, and then drop into the digester 100 through the discharge port 511 for digestion reaction. It should be noted that when the main shaft 300 rotates, it will drive the fixed rod 512 to rotate. When the fixed rod 512 rotates, it can drive the grinding roller 513 and the crushing roller 514 on the surface to crush and grind the lime blocks. After the lime blocks are crushed and ground, they can slide through the inclined surface of the conical grinding plate 510 to the inside of the discharge port 511, and then fall from the discharge port 511 into the reaction water inside the digester 100 for digestion reaction. It should be noted here that since the bottom end of the discharge port 511 is lower than the top end of the dust inlet 616, the dust inlet 616 can be prevented from sucking in and collecting the lime powder falling from the discharge port 511.

[0023] like Figures 1-6 As shown, the crushing assembly 500 also includes a guide ring 521 and a protrusion 525. The protrusions 525 are fixedly installed at both ends of the shovel plate 520. The protrusions 525 are movably connected in the slide groove of the guide ring 521. The slide groove is provided with a smooth portion and a protrusion. The guide ring 521 is rotatably installed in the assembly groove inside the digester 100. The rotation of the shovel plate 520 can drive the protrusion 525 to slide in the slide groove of the guide ring 521. When the protrusion 525 slides in the smooth portion, the lime powder can be scooped up. When the protrusion 525 is on the protrusion, it can drive the shovel plate 520 to slide vertically on the main shaft 300. The vertical sliding of the shovel plate 520 can avoid the scooped lime powder. A magnet is provided on the shovel plate 520. When the shovel plate 520 rotates, the magnet on the surface can adsorb the metal impurities after the lime is crushed. It should be noted that the main shaft 300 will drive the shovel plate 520 to rotate when it rotates. When the shovel plate 520 rotates, it can drive the end protrusion 525 to slide in the guide ring 521 slot. When the protrusion 525 slides on the smooth part of the slot, the bottom of the shovel plate 520 will fit on the upper surface of the conical grinding plate 510 to scoop up the crushed or ground lime. After the lime is scooped up, it will slide along the inclined surface of the conical grinding plate 510 and accumulate at the same time. When the protrusion 525 slides to the raised part of the slot, it can drive the shovel plate 52 0 moves upward, and the shovel plate 520 can slide axially on the surface of the main shaft 300 when moving upward. The shovel plate 520 will pass over the position where the lime is accumulated while moving upward. After the shovel plate 520 passes over the position where the lime is accumulated, the grinding roller 513 and the crushing roller 514 will continue to process the accumulated lime. When the shovel plate 520 slides to the smooth part of the chute, the lime can be continuously shoveled up. When the shovel plate 520 scoops up the lime powder, the magnet will adsorb the metal impurities after the lime is crushed, so that the purity of the lime can be improved during the reaction.

[0024] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the crushing assembly 500 also includes an annular rack 522, a gear 523 and a tooth block 524. The annular rack 522 is fixedly installed at the bottom end of the guide ring 521. The gear 523 that matches the annular rack 522 is rotatably installed on the inner side of the digester 100 through the assembly groove. The end of the fixed rod 512 is installed with a tooth block 524 that matches the gear 523. The rotation of the fixed rod 512 can drive the tooth block 524 to push the gear 523 to engage and rotate. When the gear 523 engages and rotates, it can drive the guide ring 521 to rotate through the annular rack 522. When the guide ring 521 rotates, the position of the protrusion of the slide groove can be adjusted. It can be imagined that when the fixed rod 512 rotates, the end tooth block 524 will be driven 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 engage and rotate. When the gear 523 engages and rotates, it can drive the annular rack 522 to rotate. When the annular rack 522 rotates, it can drive the guide ring 521 to rotate in the assembly groove of the digester 100. When the guide ring 521 rotates, the position of the smooth part and the raised part of the slide groove can be adjusted, thereby preventing the shovel plate 520 from always accumulating lime in one position, causing the lime at this position to always be crushed and ground and unable to fall into the inside of the digester 100.

[0025] like Figure 1-Figure 7As shown, the dust treatment assembly 600 also includes a liquid balancing tank 610, an air pump 611, a lower dust suction pipe 613, a first ring 614 and a conveying trough 615. The outer surface of the digester 100 is installed with a liquid balancing tank 610. Two air pumps 611 are fixedly installed on the outer surface of the liquid balancing tank 610 in a ring array. The input end of one air pump 611 is connected to the upper dust suction pipe 612, and the input end of the other air pump 611 is connected to one end of the lower dust suction pipe 613. The output ends of the two air pumps 611 are both connected to the liquid balancing tank 610. The upper part is connected, and the other end of the lower dust suction pipe 613 is fixedly installed with a first ring 614. The inner side of the first ring 614 is rotatably installed on the end of the main shaft 300 through a sealed bearing. A conveying groove 615 is opened on the inner side of the main shaft 300 and the stirring frame 400. The conveying groove 615 of the main shaft 300 is connected to the conveying groove 615 of the stirring frame 400. The conveying groove 615 of the main shaft 300 is connected to the first ring 614 and the lower dust suction pipe 613. The conveying groove 615 of the stirring frame 400 is connected to the dust inlet 616; It is worth noting that when the air pump 611 is working, the dust generated during the crushing and grinding can be collected through the upper dust suction pipe 612, and the collected dust will be discharged into the interior of the equalizing liquid tank 610. When the air pump 611 is working, the steam and dust will enter the conveying trough 615 through the dust inlet 616, and then the conveying trough 615 will convey the steam and dust to the lower dust suction pipe 613. Finally, the lower dust suction pipe 613 will convey the steam and dust to the interior of the equalizing liquid tank 610 through the air pump 611. When the dust enters the interior of the equalizing liquid tank 610, it will react with water. When the temperature of the equalizing liquid tank 610 is the same as the temperature inside the digester 100, the lime water inside the equalizing liquid tank 610 will be discharged back into the digester 100 for further digestion and processing. When the main shaft 300 rotates, it can rotate through the sealed bearing and the first ring 614. The first ring 614 can convey the steam and dust inside the conveying trough 615 to the lower dust suction pipe 613 through the through groove opened by itself.

[0026] like Figures 1-4 、 Figure 6 and Figure 7 As shown, the dust handling assembly 600 also includes a conveying pipe 620, a second collar 621, a spraying pipe 622 and a nozzle 623. The conveying pipe 620 is installed at the bottom of the liquid equalizing tank 610. The other end of the conveying pipe 620 passes through the end of the main shaft 300 through a sealed bearing and is connected to the inside of the conveying trough 615. The outer surface of the other end of the conveying pipe 620 is rotatably mounted with a second collar 621 through a sealed bearing. The outer surface of the second collar 621 is mounted with a spraying pipe 622. The spraying pipe 622 is connected to the conveying pipe 620 through the second collar 621. The other end of the spraying pipe 622 is mounted in the conveying trough 615 of the stirring frame 400. The outer surface of the spraying pipe 622 is mounted with a nozzle 623. One end of the nozzle 623 passes through the conveying trough 615 and is connected to the outside of the stirring frame 400. It can be understood that when the temperature of the lime water inside the equalizing liquid tank 610 is the same as the temperature of the lime water inside the digester 100, the lime water inside the equalizing liquid tank 610 can be transported to the inside of the spraying pipe 622 through the conveying pipe 620, and the lime water inside the spraying pipe 622 is then sprayed onto the inner wall of the digester 100 by the nozzle 623. When spraying, the lime water can disperse the lime powder adhered to the inner wall of the digester 100.

[0027] like Figures 1-4 、 Figure 6 and Figure 7 As shown, the impurity filtering assembly 700 further includes a connecting rod 711, a guide frame 712, a guide rod 713, a guide block 714 and a corrugated slide 715. Adjacent filter plates 710 are fixedly connected by the connecting rod 711. The outer surface of the stirring frame 400 is sleeved with the guide frame 712. Guide rods 713 are fixedly mounted on both sides of the guide frame 712. One end of one guide rod 713 is connected to the filter plate 710, and one end of the other guide rod 713 is fixedly mounted with a guide block 714. The guide block 714 is movably mounted inside the corrugated slide 715, and the corrugated slide 715 is fixedly mounted on the inner wall of the digester 100. It should be conceivable that when the stirring rack 400 rotates, the guide block 714 can be driven to slide on the corrugated slide 715 through the guide frame 712 and the guide rod 713. When the guide block 714 slides, it can follow the corrugated shape of the corrugated slide 715 to approach and move away from the stirring rack 400. When the guide block 714 approaches and moves away from the stirring rack 400, it will push the guide frame 712 to slide back and forth on the surface of the stirring rack 400 through the guide rod 713. When the guide frame 712 slides, it will drive the guide rod 713 on the other side to push the filter plate 710. When the filter plate 710 is pushed, the connecting rod 711 can push the remaining filter plates 710 to slide back and forth in the stirring rack 400. When the filter plate 710 slides back and forth, the filtering area for impurities can be increased. At the same time, when the filter plate 710 moves back and forth, the lime adhered to the surface can be dispersed.

[0028] like Figures 1-4 、 Figure 7 As shown, the impurity filtering assembly 700 further includes a cleaning plate 720, a movable ring 721, and a spring 722. The outer surface of the guide rod 713 near the guide block 714 is sleeved with the movable ring 721. The spring 722 is fixedly installed between the movable ring 721 and the guide frame 712. The cleaning plate 720 is fixedly installed on the surface of the movable ring 721. The cleaning plate 720 is triangular in shape. The vertical surface and horizontal surface of the cleaning plate 720 are respectively attached to the inner wall of the digester 100 and the surface of the corrugated slide rail 715. It should be noted that when the guide rod 713 rotates, it can drive the cleaning plate 720 to slide along the inner wall of the digester 100 and the surface of the corrugated slide rail 715 through the movable ring 721. When the cleaning plate 720 slides, the lime that has fallen on the corrugated slide rail 715 can be cleaned. At the same time, when the guide rod 713 moves away from or approaches the corrugated slide rail 715, the movable ring 721 can use the elastic force of the spring 722 itself to keep the cleaning plate 720 always in contact with the inner wall of the digester 100.

[0029] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A highly efficient digestion and impurity removal device for lime as a raw material for propylene oxide, comprising: A digester, wherein a lime feed port for conveying lime blocks is installed on the top of the digester, a main shaft is rotatably installed at the axial center of the top of the digester through a driving member, and a stirring frame is fixedly installed on the outer surface of the main shaft, characterized in that a crushing assembly is installed on the upper inner side of the digester, a dust treatment assembly is installed on the digester, and an impurity filtering assembly is installed on the stirring frame; The crushing assembly includes a conical grinding plate, a grinding roller, a crushing roller and a shovel plate. The conical grinding plate is fixedly installed on the inner upper part of the digester. Every two grinding rollers and three crushing rollers are arranged in a group with equal distances from the axis of the grinding rollers. They are symmetrically arranged on the upper outer surface of the main shaft. The outer surface of the main shaft is axially slidably mounted 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. The rotation of the main shaft can drive the shovel plate to scoop up the lime powder adhering 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 digester near the lime feed inlet. The dust suction port of the upper dust suction pipe passes through the outer surface of the digester and is located inside the digester. The dust inlet is installed on the top of the stirring frame. The upper dust suction pipe can collect dust generated during crushing, and the dust inlet can collect high-temperature steam and dust generated during the lime reaction. The impurity filtering component includes a filter plate, which is movably mounted on a stirring frame. The rotation of the stirring frame can drive the filter plate to collect impurities in the digester.

2. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 1, characterized in that: The crushing assembly also includes a discharge port and a fixing rod. The discharge port is installed at the axial center of the conical grinding plate. A fixing rod is installed through the axial center of each set of the grinding roller and the crushing roller. One end of the fixing rod is fixedly mounted on the outer surface of the main shaft. The grinding roller and the crushing roller are in the shape of a truncated cone, and the diameters of the grinding roller and the crushing roller decrease successively. The rotation of the main shaft can drive the fixed rod to rotate, and the rotation of the fixed rod will drive the grinding roller and the crushing roller on the surface to roll on the conical grinding plate to grind the lime, and then fall into the digester through the discharge port for digestion reaction.

3. The efficient digestion and impurity removal device for lime as a raw material of propylene oxide according to claim 2, characterized in that: The crushing assembly further includes a guide ring and a protrusion, the protrusions being fixedly mounted on both ends of the shovel plate, the protrusions being movably connected in a slide groove of the guide ring, the slide groove being provided with a smooth portion and a protrusion, and the guide ring being rotatably mounted in an assembly groove inside the digester; The rotation of the shovel plate can drive the protrusion to slide in the slide groove of the guide ring. When the protrusion slides in the smooth part, it can scoop up the lime powder. When the protrusion is in the raised part, it can drive the shovel plate to slide vertically on the main shaft. The vertical sliding of the shovel plate can avoid the scooped lime powder. A magnet is provided on the shovel plate. When the shovel plate rotates, the metal impurities after the lime is crushed can be adsorbed through the magnet on the surface.

4. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 3, characterized in that: The crushing assembly also includes an annular rack, a gear and a gear block. The annular rack is fixedly installed at the bottom end of the guide ring. A gear that matches the annular rack is rotatably installed on the inner side of the digester through an assembly groove. The end of the fixed rod is equipped with a gear block that matches the gear. The rotation of the fixing rod can drive the tooth block to push the gear to engage and rotate. When the gear engages and rotates, it can drive the guide ring to rotate through the annular rack. When the guide ring rotates, the position of the sliding groove protrusion can be adjusted.

5. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 1, characterized in that: The dust treatment assembly also includes a liquid equalizing box, an air pump, a lower dust suction pipe, a first ring and a conveying trough. The outer surface of the digester is equipped with a liquid equalizing box, and the outer surface of the liquid equalizing box is fixedly equipped with two air pumps in a ring array. The input end of one of the air pumps is connected to the upper dust suction pipe, and the input end of the other air pump is connected to one end of the lower dust suction pipe. The output ends of the two air pumps are both connected to the upper part of the liquid equalizing box; A first sleeve is fixedly installed on the other end of the lower dust suction pipe, and the inner side of the first sleeve is rotatably installed on the end of the main shaft through a sealed bearing. Conveying grooves are provided on the inner sides of the main shaft and the stirring frame. The conveying groove of the main shaft is connected with the conveying groove of the stirring frame, and the conveying groove of the main shaft is connected with the first sleeve and the lower dust suction pipe, and the conveying groove of the stirring frame is connected with the dust inlet.

6. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 5, characterized in that: The dust handling assembly also includes a delivery pipe, a second collar, a spray pipe and a nozzle. The delivery pipe is installed at the bottom of the liquid equalizing tank. The other end of the delivery pipe passes through the end of the main shaft through a sealed bearing and is connected to the inside of the delivery trough. The outer surface of the other end of the delivery pipe is rotatably mounted with a second collar through a sealed bearing. The outer surface of the second collar is mounted with a spray pipe, and the spray pipe is connected to the delivery pipe through the second collar. The other end of the spray pipe is installed in the conveying trough of the stirring frame. A nozzle is installed on the outer surface of the spray pipe. One end of the nozzle passes through the conveying trough and is connected to the outside of the stirring frame.

7. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 1, characterized in that: The impurity filtering assembly further includes a connecting rod, a guide frame, a guide rod, a guide block and a corrugated slide rail. Adjacent filter plates are fixedly connected by connecting rods. The outer surface of the stirring frame is sleeved with a guide frame. Guide rods are fixedly installed on both sides of the guide frame. One end of one of the guide rods is connected to the filter plate, and one end of the other guide rod is fixedly installed with a guide block. The guide block is movably mounted inside the corrugated slide rail, and the corrugated slide rail is fixedly mounted on the inner wall of the digester.

8. The device for efficiently digesting and removing impurities from lime as a raw material for propylene oxide according to claim 7, characterized in that: The impurity filtering assembly also includes a cleaning plate, a movable ring and a spring. The guide rod is sleeved with a movable ring on the outer surface close to the guide block. A spring is fixedly installed between the movable ring and the guide frame. A cleaning plate is fixedly installed on the surface of the movable ring. The cleaning plate is triangular, and the vertical and horizontal surfaces 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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