Plastic pellet fluidized bed dryer

Abstract

The plastic particle fluidized bed dryer provided by the present invention arranges an annular wind shield in the fluidized bed, and makes the lower end surface of the annular wind shield fit with the bottom wall of the fluidized bed, and makes the upper end surface of the annular wind shield fit with the lower surface of the main filter, so that the flow rate and pressure of the normal temperature air flow used to suspend the plastic particles are in a stable state, and then a material receiving device including a material receiving pipe is arranged, so that the material receiving pipe has a bending portion, so that the end of the material receiving pipe located on one side of the bending portion is detachably connected to the lower end of the discharge pipe, and the end of the material receiving pipe located on the other side of the bending portion is connected to the suction machine, so that the angle between the axial center lines of the material receiving pipes on both sides of the bending portion is ≥60° and ≤90°; when in use, the feed valve and the discharge valve can be set to a normally open state, and the suspension height of the plastic particles in the fluidized bed is controlled by the operating frequency and / or suction force of the suction machine. The control method is simple and convenient, and the production efficiency is high during continuous production.

Description

Technical Field

[0001] The invention relates to the field of plastic particle processing and manufacturing, and in particular to a plastic particle fluidized bed dryer. Background Art

[0002] Fluidized bed dryer uses normal temperature air flow to suspend plastic particles, and fluidized boiling allows heat exchange between plastic particles and normal temperature air flow (because the temperature of plastic particles is about 200°C after screw mixing and extrusion, although they are water-cooled, the temperature of plastic particles entering the fluidized bed is still over 100°C, and the moisture on the surface of plastic particles is vaporized), thereby taking away the evaporated moisture on the surface of plastic particles, allowing the hot and humid plastic particles to dry and cool quickly, preventing the phenomenon of plastic particles sticking together after vacuum packaging.

[0003] During the use of the fluidized bed dryer, the suspension height of the plastic particles in the fluidized bed is an important control parameter. If the suspension height is too high, there will be too few plastic particles in the fluidized bed, and the production efficiency will be low during continuous production. If the suspension height is too low, there will be too many plastic particles in the fluidized bed, and it will be difficult for the normal temperature air flow to completely carry away the water evaporated on the surface of the plastic particles.

[0004] The main factors affecting the suspension height of plastic particles are: the opening size of the fluidized bed feed valve and the discharge valve, the flow rate and pressure of the room temperature air flow that suspends the plastic particles, the weight and shape differences of the plastic particles themselves, etc. The existing fluidized bed dryer usually adopts manual observation of the suspension height of the plastic particles in the fluidized bed, and then adjusts the opening size of the fluidized bed feed valve and the discharge valve, the flow rate and pressure of the room temperature air flow used to suspend the plastic particles according to the situation, so that the suspension height of the plastic particles in the fluidized bed is in a reasonable state, but this method is time-consuming and labor-intensive, and difficult to control. Of course, there are also fluidized bed dryers that use sensors to detect the suspension height of plastic particles in the fluidized bed and then adjust it, but individual plastic particles are very easy to cause the sensor in this method to misjudge when suspended due to different weights or shapes, resulting in inaccurate detection, making it difficult to accurately control. Summary of the invention

[0005] The purpose of the present invention is to overcome the disadvantages of the prior art and to provide a plastic particle fluidized bed dryer capable of conveniently controlling the suspension height of the plastic particles in the fluidized bed.

[0006] To achieve the above object, the technical solution provided by the present invention is that a plastic particle fluidized bed dryer comprises:

[0007] The fluidized bed is a vertically arranged cylindrical barrel, the top of the fluidized bed is provided with a feed inlet and an air outlet, the side wall of the lower part of the fluidized bed is provided with an air inlet, and the bottom of the fluidized bed is provided with a discharge port;

[0008] A transparent observation window is provided on the outer wall of the fluidized bed, and the observation window is used to observe the suspension height of the plastic particles in the fluidized bed;

[0009] A main filter screen, the main filter screen is arranged inside the fluidized bed, the main filter screen is located above the air inlet, the outer circumferential surface of the main filter screen is sealed and connected to the inner wall of the fluidized bed, the main filter screen is evenly distributed with a plurality of meshes, and the size of the meshes is smaller than the size of the plastic particles;

[0010] An air outlet filter, the air outlet filter is arranged at the air outlet, and the air outlet filter is used to prevent the plastic particles in the fluidized bed from overflowing outward through the air outlet;

[0011] A blower, wherein the exhaust port of the blower is connected to the air inlet through an air blast duct;

[0012] A feed pipe connected to the feed port;

[0013] A feed valve, the feed valve is arranged on the feed pipe, and the feed valve is used to control the flow rate of plastic particles flowing through the feed pipe;

[0014] A discharge pipe, the discharge pipe is connected to the discharge port, the upper end of the discharge pipe extends upward into the interior of the fluidized bed, the upper end of the discharge pipe penetrates the main filter screen and is sealed and connected to the main filter screen;

[0015] A discharge valve, the discharge valve is arranged on the discharge pipe, and the discharge valve is used to control the flow rate of plastic particles flowing through the discharge pipe;

[0016] The plastic particle fluidized bed dryer also includes a material receiving device, which includes a material receiving pipe and a material receiving tray, the material receiving pipe has a bending portion, the end of the material receiving pipe located on one side of the bending portion is detachably connected to the lower end of the discharge pipe, the end of the material receiving pipe located on the other side of the bending portion is connected to a suction machine, and the angle between the axis lines of the material receiving pipes on both sides of the bending portion is ≥60° and ≤90°; the material receiving tray is sleeved on the material receiving pipe on the side of the bending portion close to the discharge pipe, and when the material receiving pipe is disassembled, the material receiving tray is used to receive the plastic particles remaining in the discharge pipe located below the discharge valve;

[0017] An annular wind shield is also provided in the fluidized bed, the lower end surface of the annular wind shield is in contact with the bottom wall of the fluidized bed, the upper end surface of the annular wind shield is in contact with the lower surface of the main filter, and an annular air duct is formed between the outer wall of the annular wind shield and the inner wall of the fluidized bed, the bottom wall of the fluidized bed and the lower surface of the main filter. The normal temperature dry air delivered by the blower into the fluidized bed through the air inlet passes through the annular air duct, passes through the mesh of the main filter, and then moves upward, and blows the plastic particles in the fluidized bed upward to make them suspended in the fluidized bed.

[0018] Preferably, the distance between the annular wind shield and the inner wall of the fluidized bed is greater than one quarter of the radius of the main filter and less than three quarters of the radius of the main filter.

[0019] Further preferably, the distance between the annular wind shield and the inner wall of the fluidized bed is equal to half of the radius of the main filter.

[0020] Preferably, a plurality of air holes are provided on the material receiving pipe located at the side of the bending portion close to the suction machine, and the size of the air holes is smaller than the size of the plastic particles.

[0021] Preferably, a filter screen is provided at the end of the receiving pipe connected to the discharging pipe, and the filter screen is used to prevent the agglomerated plastic particles from entering the receiving pipe.

[0022] Further preferably, the filter screen is composed of a plurality of cylindrical rods welded in the material receiving pipe, and adjacent cylindrical rods are parallel to each other.

[0023] Preferably, the end of the receiving pipe connected to the discharging pipe is provided with an upper annular flange, and the lower end of the receiving pipe is provided with a lower annular flange. The upper annular flange and the lower annular flange fit each other and are tightened by a quick groove clamp.

[0024] Preferably, the inner diameter of the material receiving pipe located at the side of the bending portion close to the discharge pipe is larger than the inner diameter of the material receiving pipe located at the side of the bending portion close to the suction machine.

[0025] Preferably, a through hole for the receiving pipe to pass through is provided in the middle of the receiving tray, the inner wall of the through hole is sealedly connected to the outer wall of the receiving pipe, the edge of the receiving tray is folded vertically upward to form a guard, and the upper end of the guard is lower than the end of the receiving pipe connected to the discharge pipe.

[0026] Further preferably, an inner frame, an outer frame and a desiccant are provided at the air inlet of the blower, and the desiccant is clamped between the inner frame and the outer frame. The external air sucked in by the blower passes through the outer frame, the desiccant and the inner frame in sequence. The desiccant is a bagged desiccant and can be reused after drying.

[0027] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0028] The plastic particle fluidized bed dryer provided by the present invention is provided with an annular wind shield in the fluidized bed, and the lower end surface of the annular wind shield is fitted with the bottom wall of the fluidized bed, and the upper end surface of the annular wind shield is fitted with the lower surface of the main filter screen, so that the outer wall of the annular wind shield and the inner wall of the fluidized bed, the bottom wall of the fluidized bed and the lower surface of the main filter screen form an annular air duct, so that the flow rate and pressure of the normal temperature air flow used to suspend the plastic particles are in a stable state, and then a material receiving pipe with a bent portion and a material receiving tray are provided. The material receiving device is configured such that the end of the material receiving pipe on one side of the bending portion is detachably connected to the lower end of the discharge pipe, and the end of the material receiving pipe on the other side of the bending portion is connected to the suction machine, so that the angle between the axis lines of the material receiving pipes on both sides of the bending portion is ≥60° and ≤90°; when in use, the feed valve and the discharge valve can be set to a normally open state, and the suspension height of the plastic particles in the boiling bed can be controlled by the operating frequency and / or suction force of the suction machine. The control method is simple and convenient, and the production efficiency is high during continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view schematic diagram of the present invention, with part of it being cut away.

[0030] Among them: 100. fluidized bed; 101. feed port; 102. air outlet; 1021. air outlet filter; 103. air inlet; 104. discharge port; 105. observation window; 200. main filter; 201. mesh; 300. blower; 301. air inlet; 3011. inner frame; 3012. outer frame; 3013. dryer; 302. exhaust port; 303. air blast duct; 400. Feed pipe; 401. Feed valve; 500. Discharge pipe; 501. Discharge valve; 5012. Lower annular flange; 600. Material receiving device; 601. Material receiving pipe; 6011. Bending portion; 6012. Air vent; 6013. Cylindrical rod; 6014. Upper annular flange; 602. Material receiving tray; 6021. Through hole; 6022. Side guard; 700. Annular wind shield; 701. Annular air duct. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0032] The up and down directions described in the present invention refer to Figure 1 The upper and lower directions in the present invention refer to the left and right directions in the present invention. Figure 1 left and right direction in center.

[0033] like Figure 1 As shown, the fluidized bed dryer for plastic particles provided by the present invention comprises: a fluidized bed 100, a main filter 200, a blower 300, a feed pipe 400, a discharge pipe 500, a material receiving device 600 and an annular wind shield 700; wherein, the fluidized bed 100 is a vertically arranged cylindrical barrel, a feed port 101 and an air outlet 102 are provided at the top of the fluidized bed 100, an air inlet 103 is provided on the side wall of the lower part of the fluidized bed 100, a discharge port 104 is provided at the bottom of the fluidized bed 100, and a transparent observation window 105 is provided on the outer wall of the fluidized bed 100, and the observation window 105 is used to observe the suspension height of the plastic particles in the fluidized bed 100.

[0034] The main filter 200 is arranged inside the fluidized bed 100 and is located above the air inlet 103. The outer circumferential surface of the main filter 200 is sealedly connected to the inner wall of the fluidized bed 100 by welding. A plurality of meshes 201 are evenly distributed on the main filter 200. The size of the mesh 201 is smaller than the size of the plastic particles, so that the plastic particles in the fluidized bed 100 cannot pass through the mesh 201.

[0035] An air outlet filter 1021 is provided at the air outlet 102 , and the air outlet filter 1021 is used to prevent the plastic particles in the fluidized bed 100 from overflowing outward through the air outlet 102 .

[0036] The blower 300 is arranged on the left side of the fluidized bed 100. The blower 300 has an air inlet 301 and an exhaust port 302. The air inlet 301 is provided with an inner frame 3011, a desiccant 3013 and an outer frame 3012 from right to left. The desiccant 3013 is a bagged desiccant, which is clamped between the inner frame 3011 and the outer frame 3012. The external air sucked in from the air inlet 301 by the blower 300 passes through the outer frame 3012, the desiccant 3013 and the inner frame 3011 in sequence and is discharged from the exhaust port 302. The desiccant 3013 can be reused after being dried. The exhaust port 302 of the blower 300 is connected with the air inlet 103 of the fluidized bed 100 through the air blast duct 303. The room temperature dry air discharged through the exhaust port 302 is sent into the fluidized bed 100 through the air blast duct 303 and the air inlet 103.

[0037] The feed pipe 400 is connected to the feed port 101 of the fluidized bed 100 . The feed pipe 400 is used to add plastic particles into the fluidized bed 100 . The feed valve 401 is arranged on the feed pipe 400 . The feed valve 401 is used to control the flow rate of plastic particles flowing through the feed pipe 400 .

[0038] The discharge pipe 500 is connected to the discharge port 104 of the fluidized bed 100. The discharge pipe 500 is used to discharge the plastic particles in the fluidized bed 100. The upper end of the discharge pipe 500 extends upward into the interior of the fluidized bed 100. The upper end of the discharge pipe 500 passes through the middle of the main filter 200 and is sealed with the main filter 200. The discharge valve 501 is set on the discharge pipe 500. The discharge valve 501 is used to control the flow rate of plastic particles flowing through the discharge pipe 500.

[0039] The material receiving device 600 includes a material receiving pipe 601 and a material receiving plate 602. The material receiving pipe 601 has a bending portion 6011. The upper end of the material receiving pipe 601 located on the left side of the bending portion 6011 is detachably connected to the lower end of the discharge pipe 500. Specifically, the upper end of the material receiving pipe 601 located on the left side of the bending portion 6011 is provided with an upper annular flange 6014, and the lower end of the material receiving pipe 500 is provided with a lower annular flange 5012. The upper annular flange 6014 and the lower annular flange 5012 fit each other and are tightened by a quick groove clamp (not shown in the figure). The advantage of such a setting is that while maintaining a certain sealing performance, it can The disassembly and installation are convenient enough; the right end of the receiving pipe 601 located on the right side of the bending portion 6011 is sealed and connected to a suction machine (not shown in the figure), and the suction machine is used to extract the plastic particles exported from the discharge pipe 500 through the receiving pipe 601. The suction machine belongs to the prior art, and the specific structure of the suction machine is not the invention point of the present invention, and it will not be repeated here. The angle between the axis lines of the receiving pipe 601 on the left and right sides of the bending portion 601 is very important. If the angle is too small, it is difficult for the suction machine to extract the plastic particles exported from the discharge pipe 500 through the receiving pipe 601, and the load of the suction machine is large, so a high-power suction machine is required. The machine is costly and uneconomical. If the angle is too large, the plastic particles discharged from the discharge pipe 500 can fall into the receiving pipe 601 under the action of their own gravity, and it is difficult to form a natural blockage at the bend 6011, and the discharge valve 501 cannot be replaced to control the flow of plastic particles in the discharge pipe 500. Preferably, the angle range is 60°-90° (inclusive). In the present embodiment, the angle is 75°, so that the suction efficiency of the suction machine can reach 85%; the inner diameter of the discharge pipe 601 on the left side of the bend 6011 is larger than the inner diameter of the receiving pipe 601 on the right side of the bend 6011. The advantage of the arrangement is that the inlet of the bending portion 6011 is large and the outlet is small, forming a throat, which is convenient for forming a natural blockage at the bending portion 6011, thereby replacing the discharge reaction 501 to control the flow rate of the plastic particles in the discharge pipe 500; the right end of the receiving pipe 601 on the right side of the bending portion 6011 is also provided with a plurality of air holes 6012, the size of the air holes 6012 is smaller than the size of the plastic particles, so that the plastic particles in the receiving pipe 601 cannot pass through the air holes 6012. The advantage of providing the air holes 6012 is that the suction machine can form a jet pump effect in the receiving pipe 601, further improving the suction efficiency of the suction machine;A filter screen is also provided at the upper end of the receiving pipe 601 on the left side of the bending portion 6011. The filter screen is used to prevent agglomerated plastic particles from entering the receiving pipe 601. Specifically, the filter screen is composed of a plurality of cylindrical rods 6013 welded in the pipe opening of the upper end of the receiving pipe 601 on the left side of the bending portion 6011. Adjacent cylindrical rods 6013 are parallel to each other. A certain gap is maintained between adjacent cylindrical rods 6013. The gap allows non-agglomerated plastic particles to pass through, but does not allow agglomerated plastic particles to pass through. Of course, the agglomerated plastic particles refer to agglomerated objects formed by more than 10 plastic particles. ;

[0040] The receiving tray 602 is mounted on the receiving tube 601 on the left side of the bending portion 6011, and a through hole 6021 is provided in the middle of the receiving tray 602 for the receiving tube 601 to pass through. The inner wall of the through hole 6021 and the outer wall of the receiving tube 601 are sealed and connected by welding. The edge of the receiving tray 602 is folded vertically upward to form a retaining edge 6022. The upper end of the retaining edge 6022 is lower than the end of the receiving tube 601 connected to the discharge tube 500, which is convenient for the disassembly and installation of the quick groove clamp. The advantage of providing the receiving tray 602 is that when the receiving tube 601 is disassembled, the plastic particles remaining in the discharge tube 500 located below the discharge valve 501 can be received by the receiving tray 602 to avoid waste. Obviously, when the receiving tube 601 is disassembled, the discharge valve 501 needs to be closed first.

[0041] The annular windshield 700 is arranged inside the fluidized bed 100. The annular windshield 700 is used to control the flow rate and pressure of the room temperature dry air passing through the main filter 200. Specifically, the lower end surface of the annular windshield 700 is in contact with the bottom wall inside the fluidized bed 100, the upper end surface of the annular windshield 700 is in contact with the lower surface of the main filter 200, the axis of the annular windshield 700 coincides with the axis of the fluidized bed 100, and the annular windshield 700 is in contact with the lower surface of the main filter 200. The outer wall and the inner wall of the fluidized bed 100, the bottom wall of the fluidized bed 100 and the lower surface of the main filter 200 form an annular air duct 701, which controls the flow rate and pressure of the normal temperature dry air passing through the main filter 200. The normal temperature dry air delivered by the blower 300 into the fluidized bed 100 through the air inlet 103 of the fluidized bed 100 passes through the annular air duct 701, passes through the mesh 201 of the main filter 200, and moves upward, blowing the fluidized bed upward. The plastic particles in the fluidized bed 100 are suspended in the fluidized bed 100; the distance between the annular wind shield 700 and the inner wall of the fluidized bed 100 will affect the size of the annular air duct 701, thereby affecting the flow rate and pressure of the normal temperature dry air passing through the main filter 200. If the distance is too large, the annular air duct 701 will be too large, and the flow rate and pressure of the normal temperature dry air passing through the main filter 200 will be small, making it difficult to blow the plastic particles in the fluidized bed 100 upward, and the power of the blower 300 needs to be increased, which is costly and not cost-effective. If the distance is too small, the normal temperature dry air passing through the main filter 200 will be concentrated near the inner wall of the fluidized bed 100, and the plastic particles located in the middle of the fluidized bed 100 will be difficult to be blown up, and the dry cooling effect of the plastic particles will be uneven. Preferably, the distance is greater than one-quarter of the radius of the main filter 200 and less than three-quarters of the radius of the main filter 200. In the present embodiment, the distance is equal to one-half of the radius of the main filter 200.

[0042] The plastic particle fluidized bed dryer provided by the present invention is provided with an annular wind shield in the fluidized bed, and the lower end surface of the annular wind shield is fitted with the bottom wall of the fluidized bed, and the upper end surface of the annular wind shield is fitted with the lower surface of the main filter screen, so that the outer wall of the annular wind shield and the inner wall of the fluidized bed, the bottom wall of the fluidized bed and the lower surface of the main filter screen form an annular air duct, so that the flow rate and pressure of the normal temperature air flow used to suspend the plastic particles are in a stable state, and then a material receiving pipe with a bent portion and a material receiving tray are provided. The material receiving device is configured such that the end of the material receiving pipe on one side of the bending portion is detachably connected to the lower end of the discharge pipe, and the end of the material receiving pipe on the other side of the bending portion is connected to the suction machine, so that the angle between the axis lines of the material receiving pipes on both sides of the bending portion is ≥60° and ≤90°; when in use, the feed valve and the discharge valve can be set to a normally open state, and the suspension height of the plastic particles in the boiling bed can be controlled by the operating frequency and / or suction force of the suction machine. The control method is simple and convenient, and the production efficiency is high during continuous production.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Plastic pellet fluidized bed dryer, including: The fluidized bed is a vertically arranged cylindrical barrel, the top of the fluidized bed is provided with a feed inlet and an air outlet, the side wall of the lower part of the fluidized bed is provided with an air inlet, and the bottom of the fluidized bed is provided with a discharge port; A transparent observation window is provided on the outer wall of the fluidized bed, and the observation window is used to observe the suspension height of the plastic particles in the fluidized bed; A main filter screen, the main filter screen is arranged inside the fluidized bed, the main filter screen is located above the air inlet, the outer circumferential surface of the main filter screen is sealed and connected to the inner wall of the fluidized bed, the main filter screen is evenly distributed with a plurality of meshes, and the size of the meshes is smaller than the size of the plastic particles; An air outlet filter, the air outlet filter is arranged at the air outlet, and the air outlet filter is used to prevent the plastic particles in the fluidized bed from overflowing outward through the air outlet; A blower, wherein the exhaust port of the blower is connected to the air inlet through an air blast duct; A feed pipe connected to the feed port; A feed valve, the feed valve is arranged on the feed pipe, and the feed valve is used to control the flow rate of plastic particles flowing through the feed pipe; A discharge pipe, the discharge pipe is connected to the discharge port, the upper end of the discharge pipe extends upward into the interior of the fluidized bed, the upper end of the discharge pipe penetrates the main filter screen and is sealed and connected to the main filter screen; A discharge valve, the discharge valve is arranged on the discharge pipe, and the discharge valve is used to control the flow rate of plastic particles flowing through the discharge pipe; Features: The plastic particle fluidized bed dryer also includes a material receiving device, which includes a material receiving pipe and a material receiving tray, the material receiving pipe has a bending portion, the end of the material receiving pipe located on one side of the bending portion is detachably connected to the lower end of the discharge pipe, the end of the material receiving pipe located on the other side of the bending portion is connected to a suction machine, and the angle between the axis lines of the material receiving pipes at both ends of the bending portion is ≥60° and ≤90°; the material receiving tray is sleeved on the material receiving pipe on the side of the bending portion close to the discharge pipe, and when the material receiving pipe is disassembled, the material receiving tray is used to receive the plastic particles remaining in the discharge pipe located below the discharge valve; An annular windshield is also provided in the fluidized bed, the lower end surface of the annular windshield fits with the bottom wall of the fluidized bed, the upper end surface of the annular windshield fits with the lower surface of the main filter, and an annular air duct is formed between the outer wall of the annular windshield, the inner wall of the fluidized bed, the bottom wall of the fluidized bed and the lower surface of the main filter. The normal temperature dry air delivered by the blower into the fluidized bed through the air inlet passes through the annular air duct, passes through the mesh of the main filter, and then moves upward, and blows the plastic particles in the fluidized bed upward to make them suspended in the fluidized bed; The distance between the annular wind shield and the inner wall of the fluidized bed is greater than one quarter of the radius of the main filter and less than three quarters of the radius of the main filter; A plurality of air holes are provided on the material receiving pipe located at the side of the bending portion close to the material suction machine, and the size of the air holes is smaller than the size of the plastic particles.

2. The plastic particle fluidized bed dryer according to claim 1, characterized in that: The distance between the annular wind shield and the inner wall of the fluidized bed is equal to half of the radius of the main filter screen.

3. The plastic particle fluidized bed dryer according to claim 1, characterized in that: The end of the receiving pipe connected to the discharging pipe is provided with a filter screen, and the filter screen is used to prevent the agglomerated plastic particles from entering the receiving pipe.

4. The plastic particle fluidized bed dryer according to claim 3, characterized in that: The filter screen is composed of a plurality of cylindrical rods welded in the material receiving pipe, and adjacent cylindrical rods are parallel to each other.

5. The plastic particle fluidized bed dryer according to claim 1, characterized in that: An upper annular flange is arranged at the end of the receiving pipe connected to the discharging pipe, and a lower annular flange is arranged at the lower end of the receiving pipe. The upper annular flange and the lower annular flange fit each other and are clamped by a quick groove clamp.

6. The plastic particle fluidized bed dryer according to claim 1, characterized in that: The inner diameter of the material receiving pipe located at the side of the bending portion close to the discharge pipe is greater than the inner diameter of the material receiving pipe located at the side of the bending portion close to the suction machine.

7. The plastic particle fluidized bed dryer according to claim 1, characterized in that: A through hole for the receiving pipe to pass through is provided in the middle of the receiving tray, the inner wall of the through hole is sealedly connected to the outer wall of the receiving pipe, the edge of the receiving tray is folded vertically upward to form a guard, the upper end of the guard is lower than the end of the receiving pipe connected to the discharge pipe.

8. The fluidized bed dryer for plastic particles according to any one of claims 1 to 7, characterized in that: The desiccant is a bagged desiccant, which can be reused after drying. An inner frame, an outer frame and a desiccant are arranged at the air inlet of the blower. The desiccant is clamped between the inner frame and the outer frame. The external air sucked in by the blower passes through the outer frame, the desiccant and the inner frame in sequence.

Images