A chlorinated polyethylene production pretreatment system

Abstract

The present invention relates to the technical field of chlorinated polyethylene production, and in particular to a chlorinated polyethylene production pretreatment system. The system comprises a support column, wherein the support column is fixedly connected with a first shell, a second shell and a third shell in sequence from top to bottom, the first shell is connected with a feed port and a water inlet at one end away from the second shell, the first shell is fixedly connected with a first motor, the first shell is rotatably connected with a first screening ring and a second screening ring in sequence from outside to inside, the first shell, the first screening ring and the second screening ring are fixedly connected with an annular inclined plate with equal spacing, and the side walls of the first screening ring and the second screening ring are provided with through holes. The present invention concentrates the washing, screening and drying processes required for the production of chlorinated polyethylene into one system, completes the screening of chlorinated polyethylene particles during the washing process, saves production time, reduces workload, improves production efficiency, and is conducive to the continuous production of chlorinated polyethylene particles.

Description

Technical Field

[0001] The invention relates to the technical field of chlorinated polyethylene production, in particular to a chlorinated polyethylene production pretreatment system. Background Art

[0002] Chlorinated polyethylene is a polymer made by introducing chlorine atoms into polyethylene molecules. Compared with ordinary polyethylene, chlorinated polyethylene has higher heat resistance, chemical corrosion resistance and flame retardancy, and can maintain good physical properties at high temperatures. Therefore, chlorinated polyethylene is widely used in the manufacture of pipelines, valves, pump bodies, chemical equipment, wire and cable sheaths and other fields.

[0003] There are treatment schemes for crude chlorinated polyethylene in the prior art. For example, a Chinese patent with application number 201810603954.X discloses a three-in-one washing, drying and screening device for preparing chlorinated polyethylene, including a shell, an air pump, a motor 1 and a receiving tray, and also includes a washing module, a drying module and a screening module. The shell is divided into an upper layer and a lower layer; the washing module is located in the upper layer of the shell, and the washing module is used to wash the chlorinated polyethylene; the drying module is located in the lower layer of the shell, and the drying module is used to dry the chlorinated polyethylene; the air pump is installed on the outer side of the lower layer of the shell, and the air pump is used to extract the wet air from the lower layer of the shell; the screening module is located below the shell, and the screening module is used to screen chlorinated polyethylene products with different particle sizes; the motor 1 is located on the ground; the receiving tray is installed on the motor shaft of the motor 1, and the receiving tray is divided into three grids. When screening chlorinated polyethylene particles, the device only uses three sliders of different heights to screen the chlorinated polyethylene particles, which easily causes chlorinated polyethylene particles of different diameters to mix. In addition, the device divides washing, screening and drying into three processes, which prolongs the production time and affects the production efficiency of chlorinated polyethylene. Summary of the invention

[0004] The object of the present invention is to provide a chlorinated polyethylene production pretreatment system to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a chlorinated polyethylene production pretreatment system, comprising a support column, the support column is fixedly connected with a first shell, a second shell and a third shell in sequence from top to bottom, the first shell is connected with a feed inlet and a water inlet at one end away from the second shell, the first shell is fixedly connected with a first motor, a first screening ring and a second screening ring are rotatably connected in sequence from outside to inside in the first shell, the first shell, the first screening ring and the second screening ring are fixedly connected with annular inclined plates with equal spacing, and the side walls of the first screening ring and the second screening ring are both provided with through holes, The first motor and the first screening ring and the second screening ring are driven by a gear set. A drain port and a discharge port are arranged on one side of the first shell close to the second shell with equal intervals. A filter plate is arranged in the drain port. The discharge port is connected to a discharge duct, and the discharge ducts on both sides are connected to the third shell. The discharge duct in the middle is connected to the second shell. A water pump is fixedly connected to the first shell. An annular electric heating rod with equal intervals is fixedly connected to the second shell. A recoil cleaning mechanism is arranged in the first shell. A flattening mechanism is arranged in the second shell. A steam recycling mechanism is arranged in the third shell.

[0006] Preferably, the symmetry center of the equally spaced drain ports and discharge ports is located on the central axis of the first shell, and the equally spaced drain ports and discharge ports are respectively connected to the cavity between the first shell and the first screening ring, the cavity between the first screening ring and the second screening ring, and the interior of the second screening ring.

[0007] Preferably, the through hole of the first sieve ring is located in the middle and upper part of its side wall, and the diameter of the through hole of the first sieve ring is slightly larger than the diameter of the standard particles, and the through hole of the second sieve ring is located in the middle and lower part of its side wall, and the diameter of the through hole of the second sieve ring is slightly smaller than the diameter of the standard particles.

[0008] Preferably, the lower side surface of the third shell is concave and a through hole is opened at the lowest point.

[0009] Preferably, the backwash cleaning mechanism includes retaining rings distributed in an annular shape with equal spacing, which are rotatably connected to the inner sides of the first shell and the first screening ring respectively, the inner sides of the first shell and the first screening ring are both slidably connected with control rings, the inner sides of the first shell and the first screening ring are both fixedly connected with electromagnets that magnetically cooperate with adjacent control rings, a fixed plate is fixedly connected to the side of the first shell away from the second shell, the fixed plate is fixedly connected with a first telescopic rod in a through-type fixed manner, the telescopic end of the first telescopic rod is fixedly connected with a piston plate, the diameter of the piston plate is equal to the inner diameter of the second screening ring, the first shell and the first screening ring are both fixedly connected with electric rollers with equal circumferential spacing, and the electric rollers are fixedly connected with stirring plates distributed in an annular shape with equal spacing.

[0010] Preferably, the flattening mechanism includes a second motor, which is fixedly connected to the second shell, and a centrifugal cylinder is rotatably connected in the second shell, the electric heating rod is located between the second shell and the centrifugal cylinder, the second shell and the side of the centrifugal cylinder close to the third shell are both provided with through holes, the second shell and the through holes of the centrifugal cylinder are connected, an electric switch is arranged in the through hole of the second shell, the second motor and the centrifugal cylinder are connected through gears and gear rings, a hollow column is fixedly connected to the middle part of the second shell, a through hole is provided in the lower part of the hollow column, the through hole of the hollow column is connected with the through hole of the centrifugal cylinder, an extrusion plate and a second telescopic rod are fixedly connected to the side wall of the hollow column, the extrusion plate is spirally shaped, the end of the second telescopic rod away from the hollow column is fixedly connected to the first scraper, the end of the second telescopic rod close to the first scraper is rotatably connected to a dispersion roller, the end of the second telescopic rod close to the first scraper is rotatably connected to a roller, the roller and the dispersion roller are matched through a belt, and the roller contacts the inner wall of the centrifugal cylinder.

[0011] Preferably, the gap between the extrusion plate and the centrifugal cylinder gradually decreases from the axis to the outside, and the minimum gap between the extrusion plate and the centrifugal cylinder is slightly larger than the diameter of the standard particles.

[0012] Preferably, the steam recycling mechanism includes a separating ring, which is rotatably connected in the third shell, a cavity connected to the through hole of the second shell is arranged in the middle part of the separating ring, the third shell is fixedly connected with symmetrically distributed separating plates, the separating plates are in contact with the separating ring, the outer wall of the centrifugal cylinder is fixedly connected with a second scraper, the second scraper is located directly below the electric heating rod, a cavity is arranged between the second shell and the centrifugal cylinder, the cavity between the second shell and the centrifugal cylinder is connected with a steam conduit, the steam conduit is connected with a heat exchange pipe, a pressure valve is fixedly connected at the connection between the steam conduit and the heat exchange pipe, the third shell is fixedly connected with a third motor, and the third motor is connected to the separating ring through a gear and a rack.

[0013] Preferably, it also includes an anti-adhesion mechanism fixedly connected to the inner side of the first shell and the inner side of the first screening ring, the anti-adhesion mechanism includes limit blocks distributed in an annular manner with equal spacing, the limit blocks distributed in an annular manner with equal spacing are respectively fixedly connected to the inner walls of the first shell and the first screening ring, and the limit blocks distributed in an annular manner with equal spacing correspond one to one with the retaining rings distributed in an even spacing, and a magnetic ball that magnetically cooperates with the control ring is connected to the bottom of the limit block through a spring.

[0014] Preferably, it also includes an automatic discharging mechanism arranged on the first shell, the automatic discharging mechanism includes a fourth motor, the fourth motor is fixedly connected to the first shell, the output shaft of the fourth motor is fixedly connected to a rotating plate, the rotating plate has through holes corresponding to the discharging port, the inner wall and outer wall of the first screening ring and the inner wall of the second screening ring are fixedly connected to a discharging baffle, and the discharging baffle is located on the upper side of the rotating plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention integrates the washing, screening and drying processes required for the production of chlorinated polyethylene into one system, and uses the squeezing force of water on the chlorinated polyethylene particles to complete the screening of the chlorinated polyethylene particles during the washing process, which not only saves production time, reduces workload and improves production efficiency, but also has compact performance that can better cooperate with other devices, which is conducive to the continuous production of chlorinated polyethylene particles.

[0017] 2. When the present invention is used, the piston plate is controlled to squeeze downward at intervals, so that the particles attached to the screen are recoiled outward, creating conditions for the standard particles on the outside and the particles with a diameter smaller than the standard particles to pass through the through holes. At the same time, the electric roller drives the stirring plate to rotate, speeding up the speed of water washing the particles, thereby improving the screening and cleaning efficiency.

[0018] 3. The present invention flattens the polyvinyl chloride particles by using an extrusion plate, so that the area of ​​the particles during drying is larger and the drying speed is accelerated.

[0019] 4. The present invention saves energy by reusing the high-temperature steam generated during the drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the housing of the present invention;

[0023] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of the first shell of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the retaining ring, the control ring and the electromagnet of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the water pump, the first screening ring and the second screening ring of the present invention;

[0026] Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of the second shell and the third shell of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixing plate, the first telescopic rod and the piston plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the electric roller and the stirring plate of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the hollow column, the extruded plate and the second telescopic rod of the present invention;

[0030] Fig.10 For the present invention Fig. 9 A schematic diagram of the enlarged structure at A in the middle;

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the second scraper, the steam conduit and the heat exchange tube of the present invention;

[0032] Fig.12 It is a three-dimensional structural schematic diagram of the steam conduit, heat exchange tube and pressure valve of the present invention;

[0033] Fig.13 It is a schematic diagram of the three-dimensional structure of the limit block and the magnetic ball of the present invention;

[0034] Fig.14 It is a schematic diagram of the three-dimensional structure of the fourth motor, the rotating plate and the discharge baffle of the present invention.

[0035] In the figure: 1, support column; 2, first shell; 201, feed port; 202, water inlet; 203, first motor; 204, first screening ring; 205, second screening ring; 206, retaining ring; 2061, control ring; 2062, electromagnet; 207, drain port; 208, discharge port; 2081, discharge conduit; 209, water pump; 3, second shell; 301, second motor; 302, centrifugal cylinder; 303, electric heating rod; 304, electric switch; 4, third shell; 401, Separation ring; 402, separation plate; 5, fixed plate; 501, first telescopic rod; 502, piston plate; 503, electric roller; 504, stirring plate; 6, hollow column; 601, extrusion plate; 602, second telescopic rod; 603, first scraper; 604, dispersion roller; 7, second scraper; 701, steam duct; 702, heat exchange tube; 703, pressure valve; 704, third motor; 8, limit block; 801, magnetic ball; 9, fourth motor; 901, rotating plate; 902, discharge baffle. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Example 1: Figure 1-Figure 6As shown, a chlorinated polyethylene production pretreatment system includes a support column 1, the support column 1 is fixedly connected with a first shell 2, a second shell 3 and a third shell 4 in sequence from top to bottom, the upper side of the first shell 2 is connected with a feed inlet 201 and a water inlet 202, the upper side of the first shell 2 is fixedly connected with a first motor 203, the first shell 2 is rotatably connected with a first sieving ring 204 and a second sieving ring 205 in sequence from outside to inside in the first shell 2, the feed inlet 201 is connected with the cavity between the first shell 2 and the first sieving ring 204, the water inlet 202 is connected with the inside of the second sieving ring 205, the first shell 2, the first sieving ring 204 and the second sieving ring 205 are all fixedly connected with annular inclined plates distributed at equal intervals, and the inclined baffle plate inside the first shell 2 The first sieve ring 204 is inclined in the counterclockwise direction, the inclined baffle plate on the outer side of the first sieve ring 204 is inclined in the clockwise direction, the inclined baffle plate on the inner side of the first sieve ring 204 is inclined in the clockwise direction, and the inclined baffle plate on the outer side of the second sieve ring 205 is inclined in the counterclockwise direction. The side walls of the first sieve ring 204 and the second sieve ring 205 are both provided with through holes. The through holes of the first sieve ring 204 are located in the middle and upper part of the side walls, and the diameter of the through holes of the first sieve ring 204 is slightly larger than the diameter of the standard particles. The through holes of the second sieve ring 205 are located in the middle and lower part of the side walls, and the diameter of the through holes of the second sieve ring 205 is slightly smaller than the diameter of the standard particles, which are used to disperse the screened particles to different heights. The first motor 203 is connected to the first sieve ring 204 and the second sieve ring 205. The gear train is used for transmission. The lower side of the first shell 2 is provided with drain ports 207 and discharge ports 208 which are evenly spaced. A filter plate is provided in the drain port 207. The filter holes on the filter plate have a diameter smaller than that of the particles with the smallest particle size, so as to separate water from particles. The symmetrical centers of the drain ports 207 and the discharge ports 208 which are evenly spaced are located on the central axis of the first shell 2. The drain ports 207 and the discharge ports 208 which are evenly spaced are respectively connected with the cavity between the first shell 2 and the first sieve ring 204, the cavity between the first sieve ring 204 and the second sieve ring 205, and the interior of the second sieve ring 205. The discharge port 208 is connected with a discharge conduit 2081, and the discharge conduits 2081 on both sides are It is connected to the third shell body 4, and the discharge conduit 2081 in the middle is connected to the second shell body 3. A water pump 209 is fixedly connected to the lower side of the first shell body 2 to transport the water in the second screening ring 205 to between the first shell body 2 and the first screening ring 204. The speed of water transported by the water pump 209 is greater than the speed of water passing through the through holes of the first screening ring 204 and the second screening ring 205. The second shell body 3 is fixedly connected with electric heating rods 303 distributed in an annular manner with equal intervals. The lower side surface of the third shell body 4 is concave and a through hole is opened at the lowest point. A recoil cleaning mechanism is provided in the first shell body 2 to prevent particles from blocking the through hole. A flattening mechanism is provided in the second shell body 3 to flatten the particles. A steam recycling mechanism for steam recycling is provided in the third shell body 4.

[0039] like Figure 7 and Figure 8 As shown, the backwash cleaning mechanism includes a retaining ring 206 distributed in an annular manner with equal spacing, and the retaining ring 206 distributed in an annular manner with equal spacing is respectively rotatably connected to the inner side of the first shell 2 and the first screening ring 204 to prevent particles from falling. The inner sides of the first shell 2 and the first screening ring 204 are both slidably connected with a control ring 2061, and the inner sides of the first shell 2 and the first screening ring 204 are both fixedly connected with an electromagnet 2062 that magnetically cooperates with the adjacent control ring 2061, and the upper side of the first shell 2 is fixedly connected with a fixed plate 5, and the fixed plate 5 is fixedly connected with a first telescopic rod 501 in a through-type fixed manner. The telescopic end of the first telescopic rod 501 is fixedly connected with a piston plate 502, and the diameter of the piston plate 502 is equal to the inner diameter of the second screening ring 205, and the first shell 2 and the first screening ring 204 are both fixedly connected with electric rollers 503 with equal circumferential spacing, and the electric rollers 503 are fixedly connected with a stirring plate 504 distributed in an annular manner with equal spacing.

[0040] like Fig. 9 and Fig.10 As shown, the flattening mechanism includes a second motor 301, the second motor 301 is fixedly connected to the second shell 3, a centrifugal cylinder 302 is rotatably connected in the second shell 3, a discharge conduit 2081 connected to the cavity between the first sieving ring 204 and the second sieving ring 205 is connected to the centrifugal cylinder 302, an electric heating rod 303 is located between the second shell 3 and the centrifugal cylinder 302, the lower sides of the second shell 3 and the centrifugal cylinder 302 are provided with through holes, the through holes of the second shell 3 and the centrifugal cylinder 302 are connected, an electric switch 304 is arranged in the through hole of the second shell 3, the second motor 301 and the centrifugal cylinder 302 are connected by gears and gear rings, a hollow column 6 is fixedly connected to the middle part of the second shell 3, a through hole is opened in the lower part of the hollow column 6, and the hollow The through hole of the column 6 is connected with the through hole of the centrifugal cylinder 302, and is used to discharge the dried particles through the through hole. The side wall of the hollow column 6 is fixedly connected with an extrusion plate 601 and a second telescopic rod 602. The extrusion plate 601 is spiral. The gap between the extrusion plate 601 and the centrifugal cylinder 302 gradually decreases from the axis to the outside, and the minimum gap between the extrusion plate 601 and the centrifugal cylinder 302 is slightly larger than the diameter of the standard particles. The telescopic end of the second telescopic rod 602 is fixedly connected with a first scraper 603, and the end of the telescopic end of the second telescopic rod 602 is rotatably connected with a dispersion roller 604. The end of the telescopic end of the second telescopic rod 602 is rotatably connected with a roller. The roller and the dispersion roller 604 are matched through a belt, and the roller contacts the inner wall of the centrifugal cylinder 302.

[0041] like Fig.11 and 12As shown, the steam recycling mechanism includes a separation ring 401, which is rotatably connected to the third shell 4, and a cavity connected to the through hole of the second shell 3 is arranged in the middle of the separation ring 401. The third shell 4 is fixedly connected with symmetrically distributed separation plates 402, and the separation plates 402 are in contact with the separation ring 401. The third shell 4, the separation ring 401 and the two separation plates 402 cooperate to form two cavities, and the two discharge conduits 2081 connected to the cavity between the first shell 2 and the first screening ring 204 and the second screening ring 205 are connected to the above two cavities. The lower part of the outer wall of the centrifugal cylinder 302 is fixedly connected with a second scraper 7, the second scraper 7 is located directly below the electric heating rod 303, a cavity is provided between the second shell 3 and the centrifugal cylinder 302, the cavity between the second shell 3 and the centrifugal cylinder 302 is connected with a steam conduit 701, the side wall of the steam conduit 701 is connected with a heat exchange tube 702, a pressure valve 703 is fixedly connected at the connection between the steam conduit 701 and the heat exchange tube 702, the third shell 4 is fixedly connected with a third motor 704, and the third motor 704 is connected to the separation ring 401 through a gear and a rack.

[0042] Before cleaning and screening the polyvinyl chloride particles, first inject water into the first shell 2 through the water inlet 202, and stop injecting water when the water level in the first shell 2 approaches its top. Then put the polyvinyl chloride particles between the first shell 2 and the first screening ring 204 through the feed port 201. The polyvinyl chloride particles entering between the first shell 2 and the first screening ring 204 are located on the upper side of the adjacent retaining ring 206. At this time, start the water pump 209 and the first motor 203. The water pump 209 will transport the water in the center of the second screening ring 205 to between the first shell 2 and the first screening ring 204. Since the speed of water transport by the water pump 209 is greater than the speed of water passing through the through holes of the first screening ring 204 and the second screening ring 205, the water level between the first shell 2 and the first screening ring 204 rises, and the water in the center of the second screening ring 205 rises. The position of the first screen ring 204 drops, and the first motor 203 drives the first screen ring 204 to rotate clockwise. As the first screen ring 204 drives the inclined baffle to rotate slowly clockwise, the first shell 2 remains stationary. At this time, the gap between the inclined baffles of the first screen ring 204 and the inclined baffles on the inner side of the first shell 2 along the way gradually decreases during rotation, which will squeeze the water between the inclined baffles. The squeezed water will flow inward through the through holes in the side walls of the first screen ring 204, driving the polyvinyl chloride particles floating in the water to flow inward together. When passing through the through holes of the first screen ring 204, the large-diameter particles are blocked on the outside of the first screen ring 204, and the standard particles and particles with a diameter smaller than the standard particles enter between the first screen ring 204 and the second screen ring 205 along the through holes, and are located on the upper side of the adjacent retaining ring 206.

[0043] The first motor 203 drives the second sieve ring 205 to rotate counterclockwise through the gears and the gear ring. As the water pump 209 continues to transport the water in the second sieve ring 205 to between the first shell 2 and the first sieve ring 204, the water level in the center of the second sieve ring 205 continues to drop. Under the action of gravity and the squeezing force of the inclined baffle, the water between the first sieve ring 204 and the second sieve ring 205 drives the polyvinyl chloride particles to flow into the second sieve ring 205. When passing through the through hole of the second sieve ring 205, the standard particles are blocked outside, and only small particles enter the second sieve ring 205 together with the water.

[0044] During the process of cleaning and screening particles, since the positions and diameters of the through holes of the first screening ring 204 and the through holes of the second screening ring 205 are different, particles of different sizes are screened through the through holes of the first screening ring 204 and the through holes of the second screening ring 205, and the screened large, medium and small particles are dispersed at different heights, preventing the screened particles from flowing back and mixing into particles of other diameters, thereby improving the accuracy of screening.

[0045] During the process of cleaning the particles, the water in the first shell 2 continues to flow toward the center of the first shell 2 under the action of gravity and extrusion force, and drives the polyvinyl chloride particles to flow toward the center of the first shell 2 for screening. However, since the particles are continuously subjected to the force toward the center, the particles that fail to pass through the through holes of the side walls of the first screening ring 204 and the second screening ring 205 will accumulate at the through holes, affecting the screening of subsequent particles. The first telescopic rod 501 is controlled to extend and retract outward every once in a while, driving the piston plate 502 to squeeze downward. Since the diameter of the piston plate 502 is equal to the inner diameter of the second screening ring 205, when the piston plate 502 is pressed downward, the pressure in the second screening ring 205 increases, squeezing the water in the second screening ring 205 outward, thereby recoil the particles attached to the outer walls of the first screening ring 204 and the second screening ring 205 outward, cleaning the particles attached to the through holes of the first screening ring 204 and the second screening ring 205, and creating conditions for the standard particles on the outside and the particles with a diameter smaller than the standard particles to pass through the through holes.

[0046] During the process of cleaning and screening particles, the electric roller 503 is started, and the electric roller 503 drives the stirring plate 504 to rotate. The stirring plate 504 stirs the nearby water flow to speed up the speed of the water flow washing the particles, thereby improving the cleaning efficiency.

[0047] During the recoil process, the retaining ring 206 will block the falling of the polyvinyl chloride particles, so that the heights of the polyvinyl chloride particles in each gap are different. In order to prevent the particles that have been screened from being mixed into particles of other diameters during the recoil process, when the cleaning and screening are completed, the control ring 2061 is moved downward by the electromagnet 2062. At this time, the retaining ring 206 loses the supporting force provided by the control ring 2061 and swings downward. The polyvinyl chloride particles move downward under the action of gravity and are discharged through the discharge port 208.

[0048] When the polyvinyl chloride particles are completely cleaned and screened, the drain port 207 is opened, and the water in the first shell 2 is discharged through the drain port 207. During this process, the particles in the water are blocked by the filter plate in the drain port 207. After the water in the first shell 2 is drained, the discharge port 208 is opened, and the screened particles move along the discharge conduit 2081. The large particles and the small particles enter the two sides of the third shell 4 along the adjacent discharge conduits 2081 and are separated by the partition plate 402. The standard particles enter the second shell 3 along the discharge conduit 2081 for drying.

[0049] After the large and small particles after screening are placed in the third shell 4, the moisture on the particles will flow downward due to gravity, and flow to the lower side of the third shell 4 through the mesh holes on the bottom surface of the separation ring 401. Since the lower side surface of the third shell 4 is concave and a through hole is opened at the lowest point, the moisture of the large and small particles will flow along the concave surface to the lowest point, and then be discharged through the through holes on the lower side surface of the third shell 4.

[0050] When the particles are washed and screened and are to be dried, the standard particles enter the centrifugal cylinder 302 along the middle discharge conduit 2081. After all the standard particles enter the centrifugal cylinder 302, the second motor 301 and the electric heating rod 303 are started. The second motor 301 drives the centrifugal cylinder 302 to rotate through the gears and the gear ring. At this time, the polyvinyl chloride particles are located at the bottom of the centrifugal cylinder 302. The rotation of the centrifugal cylinder 302 will drive the polyvinyl chloride particles to rotate. When the polyvinyl chloride particles rotate, they will be attached to the inner wall of the centrifugal cylinder 302 under the action of centrifugal force. At this time, the moisture adhered to the surface of the particles will also flow into the fine grooves on the inner wall of the centrifugal cylinder 302 under the action of centrifugal force. Since the fine grooves are shallow at the top and deep at the bottom, the water adheres to the inner wall of the centrifugal cylinder 302. The structure of the centrifugal cylinder 302 is formed, so that the water can flow to the through hole at the lower end under the combined action of gravity and centrifugal force, and finally be discharged to the space between the centrifugal cylinder 302 and the second shell 3 through the through hole at the lower end, and the polyvinyl chloride particles are accumulated on the inner wall of the centrifugal cylinder 302 under the action of centrifugal force. However, due to the gravity of the particles themselves, the particles will present a state of being thick at the bottom and thin at the top. At this time, the second telescopic rod 602 contracts, so that the first scraper 603 and the roller lose contact with the inner wall of the centrifugal cylinder 302, the squeezing plate 601 is stationary, and the particles are driven to rotate through the centrifugal cylinder 302, so that the particles are accumulated on the side wall of the centrifugal cylinder 302 under the action of centrifugal force, and the squeezing plate 601 is used to squeeze the particles accumulated on the side wall of the centrifugal cylinder 302. The particles are flattened to increase the contact area between the particles and the electric heating rod 303, thereby accelerating the drying efficiency. After the centrifugal drum 302 rotates three times, a layer of particles in contact with the inner wall of the centrifugal drum 302 has been completely dried. At this time, the second telescopic rod 602 extends to make the first scraper 603 close to the inner wall of the centrifugal drum 302. The thickness of the first scraper 603 is greater than the width of the gap between the extrusion plate 601 and the inner wall of the centrifugal drum 302. The inclined surface of the first scraper 603 is used to shovel the particles attached to the centrifugal drum 302. When the shoveled particles pass through the dispersion roller 604, they are knocked away by the fan blades on the dispersion roller 604, thereby realizing the flipping of the dry and wet particles and accelerating the drying efficiency. After the particles are completely dried, the second motor 301 Reverse, drive the centrifuge barrel 302 to rotate slowly in the clockwise direction, and use the inclined surface of the first scraper 603 to shovel off the particles attached to the inner wall of the centrifuge barrel 302. Since the thickness of the first scraper 603 is greater than the width of the minimum gap between the extrusion plate 601 and the inner wall of the centrifuge barrel 302, the shoveled particles will fly to the inside of the extrusion plate 601, and then the particles will be driven to rotate by the lower side of the centrifuge barrel 302. At this time, the rotation speed of the centrifuge barrel 302 is very small, and the centrifugal force on the particles can be ignored. The rotating particles move along the inner side of the extrusion plate 601 to the middle part of the centrifuge barrel 302, and are discharged into the separation ring 401 through the holes on the lower side of the hollow column 6, completing the drying of the particles.

[0051] During the drying process of the particles, part of the moisture will flow from the fine grooves on the inner wall of the centrifugal cylinder 302 to the space between the centrifugal cylinder 302 and the second shell 3 under the action of centrifugal force, and the other part of the moisture will generate hot steam under the action of the electric heating rod 303. The outer side of the centrifugal cylinder 302 is fixedly connected with a second scraper 7. When the second scraper 7 rotates with the centrifugal cylinder 302, the discharged moisture will be squeezed into the steam conduit 701. Since the air in the second shell 3 expands due to heat, it will enter between the centrifugal cylinder 302 and the second shell 3 through the through hole on the lower side of the centrifugal cylinder 302, and then the high-temperature steam will enter the steam conduit 701. The moisture in the steam conduit 701 will accumulate at the lower end of the outer conduit of the steam conduit 701 under the action of gravity, and the accumulated moisture will accumulate in the steam conduit 701. After reaching a certain weight (the water will not cover the connection between the steam duct 701 and the heat exchange tube 702), the pressure valve 703 opens to discharge the accumulated water from the steam duct 701, and the high-temperature steam in the steam duct 701 enters the heat exchange tube 702, and the heat exchange tube 702 transfers the heat of the high-temperature steam to the bottom of the separation ring 401. At this time, the third motor 704 is started, and the separation ring 401 is driven to rotate slightly left and right by the third motor 704, and the particles are spread flat on the lower side of the separation ring 401 by their own inertia. The water adhered to the particles flows to the lower end of the third shell 4 through the separation ring 401 under the action of gravity, and the water flows along the concave slope of the lower end of the third shell 4 to the through hole in the middle and is discharged, thereby realizing the reuse of steam.

[0052] Example 2: Figure 2 , Figure 5 and Fig.13 As shown, on the basis of Example 1, it also includes an anti-adhesion mechanism fixedly connected to the inner side of the first shell 2 and the inner side of the first screening ring 204, which is used to prevent particles from adhering to the retaining ring 206. The anti-adhesion mechanism includes limit blocks 8 distributed in an annular shape with equal intervals. The limit blocks 8 distributed in an annular shape with equal intervals are respectively fixed to the inner walls of the first shell 2 and the first screening ring 204, and the limit blocks 8 distributed in an annular shape with equal intervals correspond one to one with the retaining ring 206 distributed in an equal interval. A magnetic ball 801 magnetically matched with the control ring 2061 is connected to the bottom of the limit block 8 through a spring.

[0053] After the cleaning and screening is completed, the control ring 2061 is lowered by controlling the electromagnet 2062 to open the retaining ring 206. When the control ring 2061 drops above the magnetic ball 801, the retaining ring 206 is limited by the limit block 8 and stops swinging. The magnetic ball 801 and the control ring 2061 are attracted by magnetic force, and the control ring 2061 continues to drop. The magnetic ball 801 is brought down together by the control ring 2061 until the magnetic force of the magnetic ball 801 on the control ring 2061 is less than the pulling force of the rear spring, and the magnetic ball 801 and the control ring 2061 are no longer in contact. At this time, the magnetic ball 801 swings upward under the action of the spring and hits the retaining ring 206, causing the retaining ring 206 to vibrate and shake off the polyvinyl chloride particles adhering to it.

[0054] Example 3: Figure 2 and Fig.14 As shown, on the basis of Example 2, it also includes an automatic discharging mechanism arranged on the first shell body 2, and the automatic discharging mechanism is used to quickly discharge the cleaned and screened particles. The automatic discharging mechanism includes a fourth motor 9, and the fourth motor 9 is fixedly connected to the first shell body 2. The output shaft of the fourth motor 9 is fixedly connected to a rotating plate 901, and the rotating plate 901 has through holes corresponding to the discharging port 208. The inner wall and the outer wall of the first screening ring 204 and the inner wall of the second screening ring 205 are fixedly connected to a discharging baffle 902, and the discharging baffle 902 is located on the upper side of the rotating plate 901.

[0055] In the initial state, the through hole of the drain port 207 and the through hole of the discharge port 208 do not overlap with the through hole of the rotating plate 901, and the drain port 207 and the discharge port 208 are both closed. After the cleaning and screening is completed, the fourth motor 9 is started, and the fourth motor 9 drives the rotating plate 901 to rotate until the through hole of the rotating plate 901 coincides with the through hole of the drain port 207, the drain port 207 is opened, and the fourth motor 9 stops rotating. At this time, water starts to be discharged outward. When the sewage in the first shell 2 is discharged, Start the fourth motor 9 to drive the rotating plate 901 to rotate until the through hole of the rotating plate 901 coincides with the through hole of the discharge port 208, the drain port 207 is closed, and the discharge port 208 is opened. At this time, the fourth motor 9 stops rotating, and the first motor 203 is started to drive the discharge baffle 902 to rotate. Through the rotation of the discharge baffle 902, particles of different particle sizes accumulated on the rotating plate 901 are pushed to the three through holes of the discharge port 208 and transported out through the three discharge ducts 2081 respectively.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A chlorinated polyethylene production pretreatment system, characterized in that: The invention comprises a support column (1), wherein the support column (1) is fixedly connected with a first shell (2), a second shell (3) and a third shell (4) in sequence from top to bottom, an end of the first shell (2) away from the second shell (3) is connected with a feed inlet (201) and a water inlet (202), the first shell (2) is fixedly connected with a first motor (203), a first sieving ring (204) and a second sieving ring (205) are rotatably connected in sequence from the outside to the inside of the first shell (2), the first shell (2), and the second sieving ring (205) are all fixedly connected with annular inclined plates distributed at equal intervals, the side walls of the first sieving ring (204) and the second sieving ring (205) are each provided with through holes, the first motor (203) and the first sieving ring (204) and the second sieving ring (205) are driven by a gear train, and the first shell (2) is connected with the first sieving ring (204) and the second sieving ring (205) in sequence. The first shell (2) is provided with three drain ports (207) and a discharge port (208) at equal intervals on one side of the first shell (2) close to the second shell (3); a filter plate is provided in the drain port (207); the discharge port (208) is connected to a discharge conduit (2081); the discharge conduits (2081) corresponding to the discharge ports (208) located on both sides of the three discharge ports (208) are all connected to the third shell (4); the discharge conduit (2081) corresponding to the discharge port (208) located in the middle is connected to the second shell (3); a water pump (209) is fixedly connected to the first shell (2); an annular electric heating rod (303) at equal intervals is fixedly connected to the second shell (3); a recoil cleaning mechanism is provided in the first shell (2); a flattening mechanism is provided in the second shell (3); and a steam recycling mechanism is provided in the third shell (4); The through hole of the first sieve ring (204) is located in the middle and upper part of its side wall, and the diameter of the through hole of the first sieve ring (204) is slightly larger than the diameter of the standard particles. The through hole of the second sieve ring (205) is located in the middle and lower part of its side wall, and the diameter of the through hole of the second sieve ring (205) is slightly smaller than the diameter of the standard particles.

2. The chlorinated polyethylene production pretreatment system according to claim 1, characterized in that: The symmetrical centers of the equally spaced drain ports (207) and discharge ports (208) are located on the central axis of the first shell (2), and the equally spaced drain ports (207) and discharge ports (208) are respectively connected to the cavity between the first shell (2) and the first sieve ring (204), the cavity between the first sieve ring (204) and the second sieve ring (205), and the interior of the second sieve ring (205).

3. The chlorinated polyethylene production pretreatment system according to claim 1, characterized in that: The lower side surface of the third shell (4) is concave and a through hole is formed at the lowest point.

4. The chlorinated polyethylene production pretreatment system according to claim 1, characterized in that: The backwash cleaning mechanism comprises an annular retaining ring (206) distributed at equal intervals, the annular retaining ring (206) distributed at equal intervals is rotatably connected to the inner side of the first shell (2) and the first screening ring (204), the inner sides of the first shell (2) and the first screening ring (204) are both slidably connected with a control ring (2061), the inner sides of the first shell (2) and the first screening ring (204) are both fixedly connected with an electromagnet (2062) that magnetically cooperates with the adjacent control ring (2061), the first shell (2) is away from the second A fixed plate (5) is fixedly connected to one side of the shell (3), a first telescopic rod (501) is fixedly connected to the fixed plate (5) in a through-type manner, a piston plate (502) is fixedly connected to the telescopic end of the first telescopic rod (501), the diameter of the piston plate (502) is equal to the inner diameter of the second screening ring (205), and electric rollers (503) with circumferentially equal spacing are fixedly connected to the first shell (2) and the first screening ring (204), and the electric rollers (503) are fixedly connected to stirring plates (504) distributed in an annular manner with equal spacing.

5. The chlorinated polyethylene production pretreatment system according to claim 1, characterized in that: The flattening mechanism comprises a second motor (301), the second motor (301) is fixedly connected to the second shell (3), a centrifugal cylinder (302) is rotatably connected in the second shell (3), an electric heating rod (303) is located between the second shell (3) and the centrifugal cylinder (302), a through hole is formed on one side of the second shell (3) and the centrifugal cylinder (302) close to the third shell (4), the through holes of the second shell (3) and the centrifugal cylinder (302) are connected, an electric switch (304) is arranged in the through hole of the second shell (3), the second motor (301) and the centrifugal cylinder (302) are connected via a gear and a gear ring, a hollow column (6) is fixedly connected in the middle of the second shell (3), and the hollow column (6) is provided in the middle of the second shell (3). A through hole is opened at the lower part of the core column (6), and the through hole of the hollow column (6) is connected to the through hole of the centrifugal cylinder (302). The side wall of the hollow column (6) is fixedly connected with an extrusion plate (601) and a second telescopic rod (602), and the extrusion plate (601) is spiral-shaped. The end of the second telescopic rod (602) away from the hollow column (6) is fixedly connected with a first scraper (603), and the end of the second telescopic rod (602) close to the first scraper (603) is rotatably connected to a dispersion roller (604), and the end of the second telescopic rod (602) close to the first scraper (603) is rotatably connected to a roller, and the roller and the dispersion roller (604) are matched through a belt, and the roller contacts the inner wall of the centrifugal cylinder (302).

6. The chlorinated polyethylene production pretreatment system according to claim 5, characterized in that: The gap between the extrusion plate (601) and the centrifugal cylinder (302) gradually decreases from the axis to the outside, and the minimum gap between the extrusion plate (601) and the centrifugal cylinder (302) is slightly larger than the diameter of the standard particles.

7. The chlorinated polyethylene production pretreatment system according to claim 5, characterized in that: The steam recycling mechanism comprises a separation ring (401), the separation ring (401) is rotatably connected to the inside of the third shell (4), a cavity connected to the through hole of the second shell (3) is arranged in the middle of the separation ring (401), the third shell (4) is fixedly connected to symmetrically distributed separation plates (402), the separation plates (402) are in contact with the separation ring (401), the outer wall of the centrifugal cylinder (302) is fixedly connected to the second scraper (7), the second scraper (7) is located directly below the electric heating rod (303), and the third A cavity is provided between the second shell (3) and the centrifugal cylinder (302); the cavity between the second shell (3) and the centrifugal cylinder (302) is connected to a steam conduit (701); the steam conduit (701) is connected to a heat exchange tube (702); a pressure valve (703) is fixedly connected to the connection between the steam conduit (701) and the heat exchange tube (702); the third shell (4) is fixedly connected to a third motor (704); and the third motor (704) is connected to the separation ring (401) via a gear and a rack.

8. The chlorinated polyethylene production pretreatment system according to claim 4, characterized in that: The invention also comprises an anti-adhesion mechanism fixedly connected to the inner side of the first shell (2) and the inner side of the first screening ring (204), the anti-adhesion mechanism comprising annularly evenly spaced limit blocks (8), the annularly evenly spaced limit blocks (8) are respectively fixedly connected to the inner walls of the first shell (2) and the first screening ring (204), and the annularly evenly spaced limit blocks (8) correspond to the evenly spaced retaining rings (206) one by one, and a magnetic ball (801) magnetically matched with the control ring (2061) is connected below the limit blocks (8) via a spring.

9. The chlorinated polyethylene production pretreatment system according to claim 1, characterized in that: The invention also comprises an automatic discharging mechanism arranged on the first housing (2), the automatic discharging mechanism comprising a fourth motor (9), the fourth motor (9) being fixedly connected to the first housing (2), the output shaft of the fourth motor (9) being fixedly connected to a rotating plate (901), the rotating plate (901) being provided with through holes distributed corresponding to the discharging opening (208), the inner wall and the outer wall of the first screening ring (204) and the inner wall of the second screening ring (205) being fixedly connected to a discharging baffle plate (902), the discharging baffle plate (902) being located on the upper side of the rotating plate (901).

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