CN111397310B - Plastic pellet fluidized bed dryer - Google Patents

Plastic pellet fluidized bed dryer Download PDF

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Publication number
CN111397310B
CN111397310B CN202010331220.8A CN202010331220A CN111397310B CN 111397310 B CN111397310 B CN 111397310B CN 202010331220 A CN202010331220 A CN 202010331220A CN 111397310 B CN111397310 B CN 111397310B
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CN
China
Prior art keywords
fluidized bed
pipe
material receiving
main filter
receiving pipe
Prior art date
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Active
Application number
CN202010331220.8A
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Chinese (zh)
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CN111397310A (en
Inventor
李梵
曹峰
路秀华
谭琼
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Suzhou Tongyou New Material Technology Co ltd
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Suzhou Tongyou New Material Technology Co ltd
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Priority to CN202010331220.8A priority Critical patent/CN111397310B/en
Publication of CN111397310A publication Critical patent/CN111397310A/en
Application granted granted Critical
Publication of CN111397310B publication Critical patent/CN111397310B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/082—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed arrangements of devices for distributing fluidising gas, e.g. grids, nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

According to the plastic particle ebullated bed dryer provided by the invention, the annular wind shield is arranged in the ebullated bed, the lower end face of the annular wind shield is attached to the bottom wall of the ebullated bed, the upper end face of the annular wind shield is attached to the lower surface of the main filter screen, so that the flow speed and pressure of normal-temperature air flow for suspending plastic particles are in a stable state, the receiving device comprising the receiving pipe is arranged, the receiving pipe is provided with the bending part, the end part of the receiving pipe positioned at one side of the bending part is detachably connected to the lower end of the discharging pipe, the end part of the receiving pipe positioned at the other side of the bending part is connected with the suction machine, the included angle between the axial leads of the receiving pipes at two sides of the bending part is more than or equal to 60 degrees and less than or equal to 90 degrees, and when the plastic particle ebullated bed dryer is used, the feeding valve and the discharging valve are both set to be in a normally open state, and the suspension height of the plastic particles in the ebullated bed is controlled through the operation frequency and/or the size of the suction machine.

Description

Plastic particle boiling bed dryer
Technical Field
The invention relates to the field of plastic particle processing and manufacturing, in particular to a plastic particle ebullated bed dryer.
Background
The fluidized bed dryer is characterized in that the fluidized bed dryer utilizes normal-temperature air flow to suspend plastic particles, and heat exchange is carried out between the plastic particles and the normal-temperature air flow through fluidized boiling (the temperature of the plastic particles is about 200 ℃ after the plastic particles are mixed and extruded by a screw rod, the temperature of the plastic particles entering a fluidized bed is still higher than 100 ℃ although the plastic particles are cooled by water, and the moisture on the surfaces of the plastic particles is gasified), so that the evaporated moisture on the surfaces of the plastic particles is taken away, the hot and humid plastic particles are quickly dried and cooled, and the phenomenon that the plastic particles are bonded into a group after vacuum packaging is prevented.
In the use process of the ebullated bed dryer, the suspension height of the plastic particles in the ebullated bed is an important control parameter, and if the suspension height is too high, the plastic particles in the ebullated bed are too small, the production efficiency is low during continuous production, and if the suspension height is too low, the plastic particles in the ebullated bed are too much, and the water evaporated on the surface of the plastic particles is difficult to be completely taken away by normal temperature air flow.
The main factors influencing the suspension height of plastic particles include the opening sizes of a feed valve and a discharge valve of a boiling bed, the flow speed and the pressure of normal-temperature air flow for suspending plastic particles, the weight and the shape difference of the plastic particles, and the like, the conventional boiling bed dryer usually adopts a mode of manually observing the suspension height of the plastic particles in the boiling bed, then adjusting the opening sizes of the feed valve and the discharge valve of the boiling bed according to the situation, and the flow speed and the pressure of the normal-temperature air flow for suspending the plastic particles, so that the suspension height of the plastic particles in the boiling bed is in a reasonable state, but the mode is time-consuming and labor-consuming, the control difficulty is high, and the boiling bed dryer adopting a sensor to detect and then adjust the suspension height of the plastic particles in the boiling bed is also adopted, but the sensor in the mode is very easy to produce misjudgment on the individual plastic particles due to the weight or the shape difference during suspension, so that the detection is inaccurate, and the control is difficult.
Disclosure of Invention
The object of the present invention is to overcome the disadvantages of the prior art and to provide a plastic particle ebullated-bed dryer which is capable of conveniently controlling the suspension height of plastic particles within the ebullated-bed.
In order to achieve the above purpose, the technical scheme provided by the invention is that the plastic particle ebullated bed dryer comprises:
The fluidized bed is a cylindrical barrel body which is vertically arranged, a feed inlet and an air outlet are formed in the top of the fluidized bed, an air inlet is formed in the side wall of the lower part of the fluidized bed, and a discharge outlet is formed in the bottom of the fluidized bed;
A transparent observation window is arranged on the outer wall of the boiling bed and is used for observing the suspension height of plastic particles in the boiling bed;
The main filter screen is arranged in the boiling bed, the main filter screen is positioned above the air inlet, the outer circumferential surface of the main filter screen is in sealing connection with the inner wall of the boiling bed, a plurality of meshes are uniformly distributed on the main filter screen, and the size of the meshes is smaller than that of plastic particles;
The air outlet filter screen is arranged at the air outlet and is used for preventing plastic particles in the boiling bed from overflowing outwards through the air outlet;
the air outlet of the air blower is communicated with the air inlet through an air blowing pipeline;
The feeding pipe is connected to the feeding hole;
a feed valve disposed on the feed pipe for controlling the flow of plastic particles through the feed pipe;
The upper end of the discharging pipe extends upwards to extend into the boiling bed, and the upper end of the discharging pipe penetrates through the main filter screen and is connected with the main filter screen in a sealing manner;
The discharge valve is arranged on the discharge pipe and is used for controlling the flow of plastic particles flowing through the discharge pipe;
the plastic particle fluidized bed dryer further comprises a receiving device, wherein the receiving device comprises a receiving pipe and a receiving tray, the receiving pipe is provided with a bending part, the end part of the receiving pipe positioned at one side of the bending part is detachably connected with the lower end of the discharging pipe, the end part of the receiving pipe positioned at the other side of the bending part is connected with a suction machine, and an included angle between axial lines of the receiving pipes at two sides of the bending part is more than or equal to 60 degrees and less than or equal to 90 degrees;
still be provided with annular deep bead in the ebullated bed, annular deep bead lower terminal surface with the diapire of ebullated bed is laminated mutually, annular deep bead's up end with the lower surface of main filter screen is laminated mutually, annular deep bead's outer wall with the inner wall of ebullated bed the diapire of ebullated bed and constitute annular wind channel between the lower surface of main filter screen, the air-blower is through the air intake to the normal atmospheric temperature dry air that the ebullated bed was carried passes behind the annular wind channel the mesh back of main filter screen upwards moves, and upwards blows plastic granules in the ebullated bed makes it suspend in the ebullated bed.
Preferably, the distance between the annular wind deflector and the inner wall of the ebullated bed is greater than one quarter of the radius of the main filter screen and less than three quarters of the radius of the main filter screen.
Further preferably, the distance between the annular wind deflector and the inner wall of the ebullated bed is equal to one half of the radius of the main filter screen.
Preferably, a plurality of ventilation holes are formed in the material receiving pipe at one side of the bending part, which is close to the material sucking machine, and the size of the ventilation holes is smaller than that of the plastic particles.
Preferably, a filter screen is arranged at the end part of the receiving pipe connected with the discharging pipe, and the filter screen is used for preventing the agglomerated plastic particles from entering the receiving pipe.
Further preferably, the filter screen is formed by a plurality of cylindrical rods welded in the receiving pipe, and adjacent cylindrical rods are parallel to each other.
Preferably, an upper annular flange is arranged at the end part of the material receiving pipe, which is connected with the material discharging pipe, a lower annular flange is arranged at the lower end part of the material receiving pipe, and the upper annular flange and the lower annular flange are mutually attached and are hooped by a quick groove clamp.
Preferably, the inner diameter of the receiving pipe at one side of the bending part close to the discharging pipe is larger than the inner diameter of the receiving pipe at one side of the bending part close to the suction machine.
Preferably, the middle part of receiving the charging tray is provided with and is used for receiving the through-hole that the material pipe passed, the inner wall of this through-hole with connect between the outer wall of material pipe sealing connection, the edge of receiving the charging tray upwards turns over perpendicularly, forms the flange, the upper end of flange is less than the material pipe with the tip that the material pipe is connected.
Still preferably, an air inlet of the blower is provided with an inner frame, an outer frame and a drying agent, the drying agent is clamped between the inner frame and the outer frame, external air sucked by the blower sequentially passes through the outer frame, the drying agent and the inner frame, the drying agent is a bagged drying agent, and the drying agent can be reused after being dried.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
According to the plastic particle ebullated bed dryer provided by the invention, the annular wind shield is arranged in the ebullated bed, the lower end face of the annular wind shield is attached to the bottom wall of the ebullated bed, the upper end face of the annular wind shield is attached to the lower surface of the main filter screen, the annular wind channel is formed between the outer wall of the annular wind shield and the inner wall of the ebullated bed, the bottom wall of the ebullated bed and the lower surface of the main filter screen, so that the flow speed and pressure of normal-temperature air flow for suspending plastic particles are in a stable state, and the receiving device comprising the receiving pipe with the bending part and the receiving disc is arranged, so that the end part of the receiving pipe at one side of the bending part is detachably connected to the lower end of the discharging pipe, the end part of the receiving pipe at the other side of the bending part is connected with the sucking machine, the included angle between the axial leads of the receiving pipes at two sides of the bending part is more than or equal to 60 DEG and less than or equal to 90 DEG.
Drawings
Fig. 1 is a schematic front view of the present invention, partially in section.
Wherein 100. Boiling bed; 101, a feed inlet; 102, an air outlet, 1021, an air outlet filter screen, 103, an air inlet, 104, a discharge hole, 105, a viewing window, 200, a main filter screen, 201, a mesh, 300, a blower, 301, an air inlet, 3011, an inner frame, 3012, an outer frame, 3013, a dryer, 302, an air outlet, 303, a blast pipe, 400, a feed pipe, 401, a feed valve, 500, a discharge pipe, 501, a discharge valve, 5012, a lower annular flange, 600, a material receiving device, 601, a material receiving pipe, 6011, a bending part, 6012, an air vent, 6013, a cylindrical rod, 6014, an upper annular flange, 602, a material receiving disc, 6021, a through hole, 6022, a flange, 700, an annular wind shield, 701, and an annular air duct.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention will be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
The vertical direction described in the present invention means the vertical direction in fig. 1, and the horizontal direction in the present invention means the horizontal direction in fig. 1.
As shown in fig. 1, the plastic particle ebullated bed dryer provided by the invention comprises an ebullated bed 100, a main filter screen 200, a blower 300, a feed pipe 400, a discharge pipe 500, a receiving device 600 and an annular wind shield 700, wherein the ebullated bed 100 is a cylindrical barrel body which is vertically arranged, the top of the ebullated bed 100 is provided with a feed inlet 101 and an air outlet 102, the side wall of the lower part of the ebullated bed 100 is provided with an air inlet 103, the bottom of the ebullated bed 100 is provided with a discharge outlet 104, the outer wall of the ebullated bed 100 is provided with a transparent observation window 105, and the observation window 105 is used for observing the suspension height of plastic particles in the ebullated bed 100.
The main filter screen 200 is arranged in the ebullated bed 100 and above the air inlet 103, the outer circumferential surface of the main filter screen 200 is in sealing connection with the inner wall of the ebullated bed 100 in a welding manner, a plurality of meshes 201 are uniformly distributed on the main filter screen 200, and the size of the meshes 201 is smaller than that of plastic particles, so that the plastic particles in the ebullated bed 100 cannot pass through the meshes 201.
An air outlet filter screen 1021 is arranged at the air outlet 102, and the air outlet filter screen 1021 is used for preventing plastic particles in the ebullated bed 100 from overflowing outwards through the air outlet 102.
The air blower 300 is arranged at the left side of the ebullated bed 100, the air blower 300 is provided with an air inlet 301 and an air outlet 302, the air inlet 301 is sequentially provided with an inner frame 3011, a drying agent 3013 and an outer frame 3012 from right to left, the drying agent 3013 is a bagged drying agent, the drying agent 3013 is clamped between the inner frame 3011 and the outer frame 3012, external air sucked by the air blower 300 from the air inlet 301 sequentially passes through the outer frame 3012, the drying agent 3013 and the inner frame 3011 and is discharged by the air outlet 302, the drying agent 3013 can be reused after being dried, the air outlet 302 of the air blower 300 is communicated with the air inlet 103 of the ebullated bed 100 through an air blowing pipeline 303, and normal-temperature dry air discharged through the air outlet 302 is fed into the ebullated bed 100 after passing through the air blowing pipeline 303 and the air inlet 103.
A feed pipe 400 is connected to the ebullated bed 100 at the feed inlet 101, the feed pipe 400 is used to supplement the ebullated bed 100 with plastic particles, a feed valve 401 is provided on the feed pipe 400, and the feed valve 401 is used to control the flow rate of the plastic particles flowing through the feed pipe 400.
The discharging pipe 500 is connected in the discharge gate 104 department of ebullated bed 100, and the discharging pipe 500 is used for deriving the plastic granules in the ebullated bed 100, and the upper end of discharging pipe 500 upwards extends into inside the ebullated bed 100, and the upper end of discharging pipe 500 runs through the middle part of main filter screen 200 and with main filter screen 200 sealing connection, and ejection of compact valve 501 sets up on the discharging pipe 500, and ejection of compact valve 501 is used for controlling the flow of the plastic granules that flows through the discharging pipe 500.
The receiving device 600 comprises a receiving pipe 601 and a receiving tray 602, wherein the receiving pipe 601 is provided with a bending part 6011, the upper end part of the receiving pipe 601 positioned at the left side of the bending part 6011 is detachably connected to the lower end of the discharging pipe 500, specifically, the upper end part of the receiving pipe 601 positioned at the left side of the bending part 6011 is provided with an upper annular flange 6014, the lower end part of the receiving pipe 500 is provided with a lower annular flange 5012, the upper annular flange 6014 and the lower annular flange 5012 are mutually attached and are hooped by a quick groove clamp (not shown in the figure), and the arrangement has the advantage that the disassembly and the installation can be conveniently carried out under the condition of maintaining certain tightness; the right end of the receiving pipe 601 located at the right side of the bending portion 6011 is in sealing connection with a suction machine (not shown in the figure), which is used for sucking out plastic particles led out of the discharging pipe 500 through the receiving pipe 601, the suction machine belongs to the prior art, the specific structure of the suction machine is not an invention point of the present invention, and not described in detail herein, the included angle between the axes of the receiving pipe 601 at the left side and the right side of the bending portion 6011 is very important, and is too small, the difficulty of sucking out plastic particles led out of the discharging pipe 500 through the receiving pipe 601 by the suction machine is large, the load of the suction machine is large, a high-power suction machine is needed, the cost is high and not cost-effective, the included angle is too large, the plastic particles led out of the discharging pipe 500 can fall into the receiving pipe 601 under the effect of self gravity, the natural blockage is difficult to form at the bending portion 6011, the flow rate of the plastic particles in the discharging pipe 500 cannot be controlled instead of the discharging valve 501, preferably, the included angle range of the included angle is 60 ° -90 ° (including this number), in this embodiment is 75 °, the suction efficiency of the suction machine can reach 85%, the inner diameter of the discharge pipe 601 at the left side of the bending part 6011 is larger than that of the receiving pipe 601 at the right side of the bending part 6011, the suction efficiency of the suction machine is further improved by enabling the suction pipe 601 at the left side of the bending part 6011 to be large, the suction pipe 601 is small in outlet, a throat part is formed, natural blockage is formed at the position of the bending part 6011 conveniently, accordingly, the discharge reverse 501 is replaced to control the flow rate of plastic particles in the discharge pipe 500, the right end part of the receiving pipe 601 at the right side of the bending part 6011 is further provided with a plurality of ventilation holes 6012, the size of the ventilation holes 6012 is smaller than that of the plastic particles, the plastic particles in the receiving pipe 601 cannot penetrate through the ventilation holes 6012, the suction pipe 6012 is arranged, the suction machine can form a jet pump effect in the receiving pipe 601, the suction pipe 601 is further improved, the upper end part of the receiving pipe 601 at the left side of the bending part is further provided with a filter screen, the filter screen is used for preventing the plastic particles of a cluster from entering the receiving pipe 601, specifically, the filter screen is formed by a plurality of pieces of plastic particles welded at the right end part of the upper end part of the receiving pipe 601 at the left side of the bending part of the connecting pipe 601, the connecting rod pieces are welded at the positions of the upper end part of the connecting pipe 601, the ends of the cylindrical ends of the connecting rod pieces are welded together, the adjacent to form the cluster particles of the cluster particles, the cluster particles are not in parallel to form the cluster particles, and the cluster particles of the cluster particles are allowed to pass through the adjacent cluster particles 6013, and the cluster particles are not formed by the cluster particles, and the cluster particles are allowed to pass through the cluster particles, and the cluster particles are formed in the cluster particles and have the cluster structures are in the cluster structures and have the particle size and are not are formed.
The receiving tray 602 is sleeved on the receiving pipe 601 at the left side of the bending part 6011, a through hole 6021 for the receiving pipe 601 to pass through is formed in the middle of the receiving tray 602, the inner wall of the through hole 6021 is in sealing connection with the outer wall of the receiving pipe 601 in a welding mode, the edge of the receiving tray 602 is vertically turned upwards to form a flange 6022, the upper end of the flange 6022 is lower than the end part of the receiving pipe 601 connected with the discharging pipe 500, the quick groove clamp is convenient to detach and install, and the receiving tray 602 is beneficial in that plastic particles remained in the discharging pipe 500 below the discharging valve 501 can be received through the receiving tray 602 when the receiving pipe 601 is detached, waste is avoided, and obviously, when the receiving pipe 601 is detached, the discharging valve 501 needs to be closed first.
The annular wind deflector 700 is arranged in the ebullated bed 100, the annular wind deflector 700 is used for controlling the flow rate and pressure of the normal temperature dry air passing through the main filter screen 200, specifically, the lower end surface of the annular wind deflector 700 is attached to the bottom wall in the ebullated bed 100, the upper end surface of the annular wind deflector 700 is attached to the lower surface of the main filter screen 200, the axial line of the annular wind deflector 700 is overlapped with the axial line of the ebullated bed 100, an annular air duct 701 is formed between the outer wall of the annular wind deflector 700 and the inner wall of the ebullated bed 100, the bottom wall of the ebullated bed 100 and the lower surface of the main filter screen 200, the annular air duct 701 controls the flow rate and pressure of the normal temperature dry air passing through the main filter screen 200, the air blower 300 moves upwards after passing through the mesh 201 of the main filter screen 200 through the annular air duct 701, and blows the plastic particles in the ebullated bed 100 upwards to suspend in the ebullated bed 100; the distance between the annular wind shield 700 and the inner wall of the ebullated bed 100 affects the size of the annular air duct 701, and thus affects the flow rate and pressure of the normal temperature dry air passing through the main filter net 200, and if the distance is too large, the annular air duct 701 is too large, the flow rate and pressure of the normal temperature dry air passing through the main filter net 200 are small, it is difficult to blow the plastic particles in the ebullated bed 100 upward, it is necessary to increase the power of the blower 300, it is costly and not cost-effective, the distance is too small, the normal temperature dry air passing through the main filter net 200 is concentrated near the inner wall of the ebullated bed 100, the plastic particles in the middle of the ebullated bed 100 are difficult to be blown up, the dry and cold effects of the plastic particles are not uniform, preferably, the distance is more than one-fourth of the radius of the main filter net 200 and less than three-fourths of the radius of the main filter net 200, in this embodiment, this distance is equal to one half the radius of the main filter screen 200.
According to the plastic particle ebullated bed dryer provided by the invention, the annular wind shield is arranged in the ebullated bed, the lower end face of the annular wind shield is attached to the bottom wall of the ebullated bed, the upper end face of the annular wind shield is attached to the lower surface of the main filter screen, the annular wind channel is formed between the outer wall of the annular wind shield and the inner wall of the ebullated bed, the bottom wall of the ebullated bed and the lower surface of the main filter screen, so that the flow speed and pressure of normal-temperature air flow for suspending plastic particles are in a stable state, and the receiving device comprising the receiving pipe with the bending part and the receiving disc is arranged, so that the end part of the receiving pipe at one side of the bending part is detachably connected to the lower end of the discharging pipe, the end part of the receiving pipe at the other side of the bending part is connected with the sucking machine, the included angle between the axial leads of the receiving pipes at two sides of the bending part is more than or equal to 60 DEG and less than or equal to 90 DEG.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (8)

1.塑料颗粒沸腾床干燥器，包括：1. Plastic pellet fluidized bed dryer, including: 沸腾床，所述沸腾床为竖直布置的圆柱形筒体，所述沸腾床的顶部设置有进料口和出风口，所述沸腾床的下部的侧壁上开设有进风口，所述沸腾床的底部设置有出料口；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; 所述沸腾床的外壁上设置有透明观察窗，所述观察窗用于观察所述沸腾床内塑料颗粒的悬浮高度；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; 主过滤网，所述主过滤网设于所述沸腾床内部，所述主过滤网位于所述进风口的上方，所述主过滤网的外圆周面与所述沸腾床的内壁密封连接，所述主过滤网上均布有多个网眼，所述网眼的尺寸小于塑料颗粒的尺寸；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; 出风滤网，所述出风滤网设置在所述出风口处，所述出风滤网用于防止所述沸腾床内的塑料颗粒经所述出风口向外溢出；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; 鼓风机，所述鼓风机的排气口与所述进风口通过鼓风管道相连通；A blower, wherein the exhaust port of the blower is connected to the air inlet through an air blast duct; 进料管，所述进料管连接在所述进料口处；A feed pipe connected to the feed port; 进料阀门，所述进料阀门设置在所述进料管上，所述进料阀门用于控制流经所述进料管的塑料颗粒的流量；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; 出料管，所述出料管连接在所述出料口处，所述出料管的上端向上延伸伸入所述沸腾床内部，所述出料管的上端部贯穿所述主过滤网并与所述主过滤网密封连接；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; 出料阀门，所述出料阀门设置在所述出料管上，所述出料阀门用于控制流经所述出料管的塑料颗粒的流量；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; 其特征在于：Features: 塑料颗粒沸腾床干燥器还包括接料装置，所述接料装置包括接料管和接料盘，所述接料管具有弯折部，位于所述弯折部一侧的所述接料管的端部可拆卸地连接在所述出料管的下端，位于所述弯折部另一侧的所述接料管的端部与吸料机相连接，所述弯折部两端的所述接料管的轴心线之间的夹角≥60°且≤90°;所述接料盘套装在所述弯折部靠近所述出料管一侧的所述接料管上，在拆卸所述接料管时，所述接料盘用于承接所述位于所述出料阀门下方的所述出料管内残留的塑料颗粒;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; 所述沸腾床内还设置有环形挡风板，所述环形挡风板的下端面与所述沸腾床的底壁相贴合，所述环形挡风板的上端面与所述主过滤网的下表面相贴合，所述环形挡风板的外壁和所述沸腾床的内壁、所述沸腾床的底壁及所述主过滤网的下表面之间构成环形风道，所述鼓风机通过所述进风口向所述沸腾床内输送的常温干空气经所述环形风道后穿过所述主过滤网的所述网眼后向上移动，并向上吹动所述沸腾床内的塑料颗粒使其在沸腾床内悬浮；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; 所述环形挡风板与所述沸腾床内壁之间的距离大于所述主过滤网半径的四分之一小于所述主过滤网半径的四分之三；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; 位于所述弯折部靠近所述吸料机一侧的所述接料管上开设有多个透气孔，所述透气孔的尺寸小于所述塑料颗粒的尺寸。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.根据权利要求1所述的塑料颗粒沸腾床干燥器，其特征在于，所述环形挡风板与所述沸腾床内壁之间的距离等于所述主过滤网半径的二分之一。2. The plastic particle fluidized bed dryer according to claim 1 is 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. 3.根据权利要求1所述的塑料颗粒沸腾床干燥器，其特征在于，所述接料管与所述出料管相连接的端部设置有过滤网，所述过滤网用于防止结团的所述塑料颗粒进入所述接料管内。3. The plastic particle fluidized bed dryer according to claim 1 is characterized in that a filter screen is provided at the end where the material receiving pipe is connected to the material discharging pipe, and the filter screen is used to prevent the agglomerated plastic particles from entering the material receiving pipe. 4.根据权利要求3所述的塑料颗粒沸腾床干燥器，其特征在于，所述过滤网由焊接在所述接料管内的若干根圆柱形杆件构成，相邻的所述圆柱形杆件之间互相平行。4. The plastic particle fluidized bed dryer according to claim 3 is 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.根据权利要求1所述的塑料颗粒沸腾床干燥器，其特征在于，所述接料管与所述出料管相连接的端部设置有上环状凸缘，所述接料管的下端部设置有下环状凸缘，所述上环状凸缘和所述下环状凸缘互相贴合，并通过快速沟槽卡箍箍紧。5. The plastic particle fluidized bed dryer according to claim 1 is characterized in that an upper annular flange is provided at the end of the material receiving pipe connected to the material discharging pipe, and a lower annular flange is provided at the lower end of the material receiving pipe, and the upper annular flange and the lower annular flange are fitted together and tightened by a quick groove clamp. 6.根据权利要求1所述的塑料颗粒沸腾床干燥器，其特征在于，位于所述弯折部靠近所述出料管一侧的所述接料管的内径大于位于所述弯折部靠近所述吸料机一侧的所述接料管的内径。6. The plastic particle fluidized bed dryer according to claim 1 is 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 larger than the inner diameter of the material receiving pipe located at the side of the bending portion close to the suction machine. 7.根据权利要求1所述的塑料颗粒沸腾床干燥器，其特征在于，所述接料盘的中部设置有用于所述接料管穿过的通孔，该通孔的内壁与所述接料管的外壁之间密封连接，所述接料盘的边缘向上垂直翻折，形成挡边，所述挡边的上端低于所述接料管与所述出料管相连接的端部。7. The plastic particle fluidized bed dryer according to claim 1 is characterized in that a through hole for the material receiving pipe to pass through is provided in the middle of the material receiving tray, the inner wall of the through hole is sealedly connected to the outer wall of the material receiving pipe, the edge of the material receiving tray is folded vertically upward to form a rib, and the upper end of the rib is lower than the end of the material receiving pipe connected to the discharge pipe. 8.根据权利要求1-7中任意一项所述的塑料颗粒沸腾床干燥器，其特征在于，干燥剂为袋装干燥剂，所述干燥剂经烘干后可重复使用，所述鼓风机的进气口处设置有内框架、外框架和干燥剂，所述干燥剂夹紧在所述内框架和所述外框架之间，被所述鼓风机吸入的外部空气依次穿过所述外框架、所述干燥剂和所述内框架。8. The plastic particle fluidized bed dryer according to any one of claims 1 to 7, characterized in that the desiccant is a bagged desiccant, which can be reused after drying, and an inner frame, an outer frame and a desiccant are provided at the air inlet of the blower, the desiccant is clamped between the inner frame and the outer frame, and the external air sucked in by the blower passes through the outer frame, the desiccant and the inner frame in sequence.
CN202010331220.8A 2020-04-24 2020-04-24 Plastic pellet fluidized bed dryer Active CN111397310B (en)

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Citations (1)

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Publication number Priority date Publication date Assignee Title
CN212081795U (en) * 2020-04-24 2020-12-04 苏州通优新材料科技有限公司 Fluidized bed dryer for plastic granules

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US20030221330A1 (en) * 2002-05-31 2003-12-04 Bryan Arnold Plastic granule dryer system
CN207214665U (en) * 2017-09-12 2018-04-10 郑州博凯医药保健品有限公司 Boiling drier and drying equipment
CN207991095U (en) * 2017-12-29 2018-10-19 浙江万马高分子材料有限公司 A kind of fluid-bed dryer of novel induced draft structure

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Publication number Priority date Publication date Assignee Title
CN212081795U (en) * 2020-04-24 2020-12-04 苏州通优新材料科技有限公司 Fluidized bed dryer for plastic granules

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