Drying device for polyvinyl chloride resin production
Through the design of dispersed feeder and high-pressure air inlet pipe, combined with elastic plate and rotating hot air pipe, the problem of accumulation of wet PVC resin in the fluidized bed is solved, and the rapid drying and efficient production of PVC resin are achieved.
Patent Information
- Application Number
- CN202422652529.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Wet polyvinyl chloride resin tends to accumulate at the feed port of the fluidized bed, resulting in insufficient contact between the particles and the hot air, thus affecting the drying effect.
A dispersed feeder and a high-pressure air inlet pipe are used to evenly disperse the wet polyvinyl chloride resin into the fluidized bed dryer. Combined with the design of elastic plates and rotating hot air pipes, full contact and rapid drying of the particles are achieved.
The rapid drying of polyvinyl chloride resin is achieved, and the production efficiency and product quality are improved.
Smart Images
Figure CN223345780U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polyvinyl chloride resin production equipment, in particular to a drying device for polyvinyl chloride resin production. Background Art
[0002] Polyvinyl chloride resin (PVC resin) is a solid, usually in the form of white or light yellow powder or granules. It is used to manufacture pipes, sheets, films, wires and cables, etc.
[0003] However, during actual production and use, polyvinyl chloride resin may absorb moisture from the air, or contain a certain amount of moisture due to contact with water during processing. The presence of moisture may interfere with the rate and progress of the polymerization reaction, thereby affecting the quality and output of the resin, such as reducing its strength, hardness and chemical corrosion resistance.
[0004] In the prior art, polyvinyl chloride resin is dried using a fluidized bed dryer, where the polyvinyl chloride resin to be dried is fed into the fluidized bed through a material inlet. In the fluidized bed, the polyvinyl chloride resin particles are fully exposed to hot air, causing moisture to evaporate rapidly, thereby achieving drying.
[0005] However, wet PVC resin is easy to stick together and difficult to disperse quickly in the fluidized bed, resulting in accumulation, which affects the full contact between PVC resin particles and hot air, thereby reducing the drying effect of the fluidized bed dryer on PVC resin.
[0006] Therefore we propose a drying device for polyvinyl chloride resin production to solve the problems in the above background. Utility Model Content
[0007] The purpose of the utility model is to provide a drying device for polyvinyl chloride resin production to solve the problem of accumulation of wet polyvinyl chloride resin at the feed port of a fluidized bed proposed in the above background technology.
[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:
[0009] A drying device for producing polyvinyl chloride resin comprises a fluidized bed dryer and a dispersed feeder matched with the fluidized bed dryer. One side of the dispersed feeder is connected to the feed port of the fluidized bed dryer, and the other side of the dispersed feeder is connected to a high-pressure air inlet pipe.
[0010] Compared with the prior art, the beneficial effects achieved by the present invention are:
[0011] The wet PVC resin is evenly distributed and fed into the fluidized bed dryer through a dispersed feeder, so that the PVC resin particles are fully in contact with the hot air in the fluidized bed, and the moisture evaporates quickly, thereby achieving drying;
[0012] The disperser rotates at high speed to break up any damp, sticky PVC resin. A high-pressure air inlet pipe then blows the dispersed PVC resin into the fluidized bed dryer, dispersing it further. The PVC resin entering the fluidized bed dryer collides with a spring plate, causing it to disperse again. It then rebounds repeatedly within the dryer, coming into full contact with the hot air inside, achieving rapid dehumidification and drying. A second motor in the rotary air inlet assembly rotates the air guide, which conveys the hot air from the second air inlet pipe to the air guide via a rotary vent valve. The hot air is then dispersed into the various hot air pipes, where it is uniformly discharged through air holes uniformly distributed across the hot air pipes, exchanging heat with the dispersed PVC resin within the cylindrical bed. Simultaneously, the multiple hot air pipes rotate to further disperse the PVC resin, rapidly drying it. The dried PVC resin particles fall down and are discharged through a discharge pipe at the bottom of the cylindrical bed. The hot air is then exhausted through the cylindrical bed exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall internal cross-sectional structure of the present invention;
[0014] Figure 2 This is a schematic diagram of the external structure of the distributed feeder of the utility model;
[0015] Figure 3 This is a schematic cross-sectional structural diagram of the distributed feeder of the present invention.
[0016] Among them: 1. Fluidized bed dryer; 2. Dispersed feeder; 3. High-pressure air inlet pipe; 4. Dispersing cylinder; 5. Feed pipe; 6. Elastic plate; 7. Multi-claw turntable; 8. Cylindrical bed; 9. Air guide seat; 10. Hot air pipe; 11. Base; 12. Rotary vent valve; 13. Second air inlet pipe; 14. Discharge pipe; 15. Exhaust port. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0018] Example 1:
[0019] See also Figure 1-3 , the utility model provides a technical solution:
[0020] A drying device for producing polyvinyl chloride resin comprises a fluidized bed dryer 1, a base 11 for fixedly supporting the fluidized bed dryer 1, and a dispersed feeder 2 coordinated with the fluidized bed dryer 1. The dispersed feeder 2 uniformly disperses wet polyvinyl chloride resin into the fluidized bed dryer 1, allowing the polyvinyl chloride resin particles to fully contact the hot air in the fluidized bed, rapidly evaporating the moisture and thus achieving drying.
[0021] Furthermore, the dispersed feeder 2 includes a dispersion cylinder 4, a feed pipe 5 for conveying materials to the dispersion cylinder 4, and a disperser installed inside the dispersion cylinder 4, wherein one side of the dispersion cylinder 4 is connected to the feed port of the fluidized bed dryer 1.
[0022] Furthermore, the other side of the dispersion cylinder 4 is connected to a high-pressure air inlet pipe 3. The axes of the high-pressure air inlet pipe 3, the dispersion cylinder 4 and the feed port of the fluidized bed dryer 1 coincide with each other. The moist polyvinyl chloride resin is fed into the dispersion cylinder 4 through the feed pipe 5. The disperser breaks up the moist and sticky polyvinyl chloride resin. The compressed high-temperature gas is passed into the dispersion cylinder 4 through the high-pressure air inlet pipe 3. The high-temperature gas blows the polyvinyl chloride resin into the fluidized bed dryer 1. Under the combined action of the disperser stirring and the high-temperature gas airflow, the polyvinyl chloride resin enters the fluidized bed dryer 1 in a more dispersed manner, which is conducive to rapid drying.
[0023] Furthermore, an elastic plate 6 is provided inside the fluidized bed dryer 1 to cooperate with the dispersed feeder 2. The elastic plate 6 is adapted to the inner wall of the fluidized bed dryer 1. The elastic plate 6 is connected to the inner wall of the fluidized bed dryer 1 through a spring. Under the airflow of high-temperature gas and the stirring of the disperser, the polyvinyl chloride resin entering the fluidized bed dryer 1 at high speed collides with the elastic plate 6, causing it to be dispersed again. The elastic plate 6 can be set at an angle to make the polyvinyl chloride resin rebound out at an angle and rebound repeatedly inside the fluidized bed dryer 1, which is conducive to its full contact with the high-temperature gas inside the fluidized bed dryer 1, thereby achieving the effect of rapid dehumidification and drying.
[0024] Preferably, the disperser is a multi-claw turntable 7 that coincides with the axis of the feed pipe 5 and a first motor that drives it to rotate. The polyvinyl chloride resin falls from the feed pipe 5 onto the high-speed rotating multi-claw turntable 7, and the multi-claw turntable 7 disperses it.
[0025] The disperser can also be a stirring roller arranged perpendicular to the axis of the feed pipe 5 and a first motor driving the stirring roller to rotate, and the polyvinyl chloride resin particles are dispersed through multiple stirring rods of the stirring roller.
[0026] Furthermore, the fluidized bed dryer 1 includes a cylindrical bed 8, a rotating air inlet member arranged inside the cylindrical bed 8, the rotating air inlet member including an air guide seat 9, a plurality of hot air pipes 10 connected to the air guide seat 9, and a second motor for driving the air guide seat 9 to rotate, the second motor for driving the air guide seat 9 to rotate is fixedly connected to the base 11, and a rotary air valve 12 is provided on the outside of the second motor shaft, a second air inlet pipe 13 is connected to the side of the rotary air valve 12, and the air guide seat 9 is rotationally connected to the rotary air valve 12, a discharge pipe 14 is connected to the side of one end of the cylindrical bed 8 connected to the air guide seat 9, an exhaust port 15 is provided at the end of the cylindrical bed 8 away from the air guide seat 9, and the bottom of the cylindrical bed 8 is connected to the fixed seat.
[0027] Preferably, air holes are evenly opened on the surface of the hot air pipe 10, and multiple hot air pipes 10 are evenly distributed on the air guide seat 9;
[0028] The high-temperature gas inside the second air inlet pipe 13 is transported to the air guide seat 9 through the rotary vent valve 12, and is dispersed to each hot air pipe 10 through the air guide seat 9. Finally, the hot air is evenly sprayed out through multiple hot air pipes 10, and heat exchange is performed on the polyvinyl chloride resin dispersed inside the cylindrical bed 8, so that it is quickly dried. The dried polyvinyl chloride resin particles fall and are output from the discharge pipe 14 at the bottom of the cylindrical bed 8, and the hot air is discharged from the exhaust port 15 of the cylindrical bed 8.
[0029] The multiple hot air pipes 10 spray hot air evenly through the air holes, which not only increases the drying area, but also can dry the polyvinyl chloride resin particles at different heights when the polyvinyl chloride resin particles fall, thereby improving the drying efficiency.
[0030] The working principle of this utility model:
[0031] Wet PVC resin is fed into dispersion drum 4 through feed pipe 5. The disperser rotates at high speed, breaking up the wet, sticky PVC resin. Simultaneously, high-pressure air inlet pipe 3 passes compressed, high-temperature gas into dispersion drum 4. This high-temperature gas blows the broken-up PVC resin into fluidized bed dryer 1. The combined effects of the disperser's agitation and the high-temperature gas flow further disperse the PVC resin into fluidized bed dryer 1.
[0032] The PVC resin entering the fluidized bed dryer 1 collides with the elastic plate 6 and is dispersed again. The elastic plate 6 can be tilted to cause the PVC resin to rebound and rebound. It rebounds repeatedly within the fluidized bed dryer 1 and comes into full contact with the hot gas inside the fluidized bed dryer 1, achieving rapid dehumidification and drying.
[0033] The second motor in the rotating air inlet component drives the air guide seat 9 to rotate, and the high-temperature gas inside the second air inlet pipe 13 is transported to the air guide seat 9 through the rotating vent valve 12, and then dispersed to each hot air pipe 10. The air holes evenly opened on the surface of the hot air pipe 10 evenly spray out the hot air, and perform heat exchange on the polyvinyl chloride resin dispersed inside the cylindrical bed 8, so that it is quickly dried. The dried polyvinyl chloride resin particles fall and are output from the discharge pipe 14 at the bottom of the cylindrical bed 8, and the hot air is discharged from the exhaust port 15 of the cylindrical bed 8.
[0034] Through the above solution, the drying device can achieve rapid drying of polyvinyl chloride resin and improve production efficiency.
[0035] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A drying device for polyvinyl chloride resin production, characterized in that: The invention comprises a fluidized bed dryer (1), a dispersed feeder (2) matched with the fluidized bed dryer (1), the dispersed feeder (2) comprising a dispersion cylinder (4), a feed pipe (5) for conveying material to the dispersion cylinder (4), and a disperser installed inside the dispersion cylinder (4); one side of the dispersed feeder (2) is connected to the feed port of the fluidized bed dryer (1), and the other side of the dispersed feeder (2) is connected to a high-pressure air inlet pipe (3); the disperser disperses the material conveyed into the dispersion cylinder (4) by the feed pipe (5).
2. A drying device for polyvinyl chloride resin production according to claim 1, characterized in that: One side of the dispersion cylinder (4) is connected to the feed port of the fluidized bed dryer (1), and the other side of the dispersion cylinder (4) is connected to the high-pressure air inlet pipe (3). The axes of the high-pressure air inlet pipe (3), the dispersion cylinder (4) and the feed port of the fluidized bed dryer (1) coincide with each other.
3. The drying device for producing polyvinyl chloride resin according to claim 1, characterized in that: An elastic plate (6) matched with the dispersed feeder (2) is provided inside the fluidized bed dryer (1), and the elastic plate (6) is adapted to the inner wall of the fluidized bed dryer (1).
4. A drying device for polyvinyl chloride resin production according to claim 3, characterized in that: The elastic plate (6) is arranged obliquely so as to be able to eject the polyvinyl chloride resin obliquely.
5. The drying device for producing polyvinyl chloride resin according to claim 2, characterized in that: The disperser is a multi-claw turntable (7) whose axis coincides with the feed pipe (5) and a first motor that drives the multi-claw turntable (7) to rotate.
6. A drying device for polyvinyl chloride resin production according to claim 2, characterized in that: The disperser comprises a stirring roller arranged perpendicularly to the axis of the feed pipe (5) and a first motor driving the stirring roller to rotate.
7. A drying device for polyvinyl chloride resin production according to claim 1, characterized in that: The fluidized bed dryer (1) comprises a cylindrical bed (8), a rotating air inlet member arranged inside the cylindrical bed (8), the rotating air inlet member comprising an air guide seat (9), a plurality of hot air pipes (10) connected to the air guide seat (9), and a second motor for driving the air guide seat (9) to rotate, the second motor being fixedly connected to a base (11), and a rotating air valve (12) being arranged outside the rotating shaft of the second motor, a second air inlet pipe (13) being connected to the side of the rotating air valve (12), and the air guide seat (9) and the rotating air valve (12) being rotationally connected.
8. A drying device for polyvinyl chloride resin production according to claim 7, characterized in that: A discharge pipe (14) is connected to the side of one end of the cylindrical bed (8) connected to the air guide seat (9), an exhaust port (15) is provided at the end of the cylindrical bed (8) away from the air guide seat (9), and the bottom of the cylindrical bed (8) is connected to the fixed seat.
9. A drying device for polyvinyl chloride resin production according to claim 8, characterized in that: Air holes are evenly opened on the surface of the hot air pipe (10), and a plurality of hot air pipes (10) are evenly distributed on the air guide seat (9).