CN110237637A - A composite dust collector for a fluidized dryer and its control system - Google Patents

Abstract

The invention discloses a composite dust collector for a fluidized dryer and a control system thereof, comprising a cyclone dust removal device, a filter bag dust removal device, a dust removal device, an air gyro dust removal device, a cylinder body and an air induction device, and the cylinder body is provided with Air inlet and air outlet, the air inlet of the cylinder is set at the bottom of the cylinder, the air outlet of the cylinder is set above the cylinder, the cyclone dust removal device, the filter bag dust removal device and the dust removal device are arranged in the cylinder, and the air gyro dust removal device It is installed on the left side of the cylinder and connected to the air inlet, and the air induction device is installed on the right side of the cylinder and connected to the air outlet. The air gyro dust removal device includes a motor, an acceleration disc, blades, a guide tube, an air gyro and a dust collection cylinder, and the motor The air gyroscope is arranged and connected between the accelerator disc and the blades, the guide tube connects the accelerator disc with the air inlet of the barrel, and the air gyroscope is arranged in the guide tube. The invention has good dust removal efficiency, long service life, strong resistance to air volume fluctuation and high safety performance.

Description

A composite dust collector for a fluidized dryer and its control system

technical field

The invention relates to the technical field of environmental protection equipment, in particular to a composite dust collector for a fluidized dryer and a control system thereof.

Background technique

With the improvement of the quality of life, the public has higher and higher requirements for air quality. However, under the industrialization of various industries, metallurgy, building materials, chemical industries and other industries will produce a large amount of dust every year, which is harmful to human health, air quality and The ecological environment has caused serious impact. Especially the dust produced by the pharmaceutical and chemical industry is extremely harmful to human health.

The fluidized dryer is used in the pharmaceutical industry, and the dust particles have certain medicinal properties, so the wet dust collector cannot be used; the dust particle size range it contains is large, and the dust removal system is required to have good separation ability for tiny dust, while ordinary dust removal equipment The separation efficiency is poor and cannot meet the requirements; and the air volume fluctuates greatly during production, so the dust removal system is required to have a strong ability to resist air volume fluctuations.

The traditional fluidized dryer commonly used dust collectors are mostly bag filter and cyclone dust collector.

The cyclone dust collector uses centrifugal force to remove dust particles from the dust-laden airflow. This dust collector has a simple structure, low cost, and stable work, but it has poor removal effect on dust with a particle size below 10 μm; at the same time, the sealing effect has a greater impact on it. Some data show that when the air leakage of the cyclone dust collector is 10-15%, the dust removal efficiency will be 0.

The bag filter is a widely used dust collector at present. Its working principle is to use a filter bag made of glass fiber and other materials, and use the sieving effect of the fiber fabric, the inertial collision effect and the diffusion effect to achieve gas-solid separation. However, when the dust processing capacity is large, the dust particles attached to the filter bag accumulate too much, and the pressure difference and resistance on both sides of the filter bag increase. When the pressure on both sides of the filter material reaches a certain value, the small particles of dust attached to the filter material may be squeezed out and then discharged into the atmosphere, which greatly reduces the dust removal efficiency and reduces the service life of the filter bag. Even if a bag is broken during the operation of the dust collector, it may lead to a rapid increase in the concentration of ash discharge, and the airflow through a small hole in the filter bag will also cause rapid damage to the filter bag and the surrounding adjacent filter bags, causing an explosion or even cause catastrophic losses.

Contents of the invention

The purpose of the present invention is to provide a compound dust collector for fluidized dryers in order to overcome the shortcomings and deficiencies of the prior art. The invention has good dust removal efficiency, long service life, strong resistance to air volume fluctuation and high safety performance.

In order to achieve the above object, the technical solution of the present invention is: a composite dust collector for a fluidized dryer, including a cyclone dust removal device, a filter bag dust removal device, a dust removal device and an air induction device, and also includes a gas gyro dust removal device and a cylinder , the cylinder is provided with an air inlet and an air outlet, the air inlet of the cylinder is arranged below the cylinder, the air outlet of the cylinder is arranged above the cylinder, the cyclone dust removal device, The filter bag dust removal device and the dust removal device are arranged in the cylinder body, the air gyro dust removal device is arranged on the left side of the cylinder body and is connected with the air inlet, and the described air induction device is arranged on the right side of the cylinder body and is connected with the air outlet. The air gyro dedusting device includes a motor, an acceleration disc, blades, a guide pipe, an air gyro and a dust collection tube, the motor is arranged behind the acceleration disc and connected with the blades, and the guide tube connects the acceleration disc It is connected with the air inlet of the barrel, and the air gyroscope is arranged in the draft tube.

By adopting the above-mentioned technical scheme, the present invention adopts the combination of the new gas gyro dust removal device with the traditional cyclone dust removal and bag dust removal, which integrates the advantages of the traditional dust collector and avoids some disadvantages. The dust-laden airflow first passes through the air gyro dust removal device, and the turbulence of the airflow is reduced under the diversion of the air gyro. Most of the tiny dust particles mixed in the airflow will leave the airflow and fall into the collection together with the centrifugal movement of the large dust particles. dust bucket. Afterwards, the unremoved dust particles are further filtered by the centrifugal force in the cyclone dust removal device to further filter the remaining large particles of dust above 10 μm, and the temperature of the airflow is lowered to reduce the damage of the filter bag, which effectively prolongs the cleaning period of the filter bag dust removal device and the filter bag. service life.

Technical solution of the present invention: the cyclone dust removal device includes a cyclone separator, an inner cone, an ash hopper and a dust collection cylinder, and the inner cone cylinder is arranged at the air inlet of the cylinder below the filter bag dust removal device. The cyclone separator and the inner cone are arranged in the ash hopper, and the dust collecting barrel is arranged under the ash hopper.

By adopting the above-mentioned technical scheme, the dust particles that have not been completely removed in the cyclone dust removal device of the present invention further filter the residual large-grained dust of more than 10 μm through the action of centrifugal force, and reduce the temperature of the airflow.

The technical solution of the present invention: the filter bag dedusting device includes a flower plate, a filter bag and a cage frame, the flower plate is fixed on the cylinder body, and the filter bag and the cage frame are arranged on the flower plate.

By adopting the above technical solution, the filter bag dust removal device of the present invention further removes dust in the air.

Technical solution of the present invention: the dust cleaning device includes a venturi tube, a pulse injection device and an electromagnetic pulse valve, the venturi tube is arranged at the upper end of the cage, and the pulse injection device is arranged above the cylinder , the electromagnetic pulse valve is arranged at the bottom of the pulse injection device.

By adopting the above-mentioned technical scheme, the electromagnetic pulse valve opens the valve when the dust removal process is required, and the compressed air in the pressure-stabilizing air bag of the pulse injection device enters the injection pipe, and is sprayed to the mouth of the filter bag by the nozzle hole. When the high-speed compressed air flows through it, a certain negative pressure is generated, so that the clean gas near the bag mouth enters the filter bag, causing the filter bag to expand rapidly outward and impact vibration, so that the dust accumulated on the surface of the filter bag falls off .

Technical solution of the present invention: the air induction device includes an induced fan and an exhaust pipe, the exhaust pipe includes an air inlet of the fan, and the exhaust pipe is connected to the cylinder air outlet on the left and the air inlet of the induced fan on the right .

By adopting the above technical solution, the air induction device of the present invention releases the filtered air that meets the air standard.

The technical solution of the present invention: the inner cone is in the shape of a horn, the horn shape includes a flared portion, and the flared portion is provided with a filter screen.

By adopting the above technical solution, the filter screen of the present invention filters out part of the dust particles in the dust-laden airflow and reduces the pressure entering the filter bag dust removal device, prolonging the service life of the filter bag.

The technical solution of the present invention: the flared part is connected to the bottom of the filter bag dust removal device, the necked part is connected to the cyclone separator, the cyclone separator is cylindrical with upper and lower openings, and the filter The bag dust removal device and the cyclone dust removal device are on the same central axis.

By adopting the above technical solution, the cyclone dust removal device of the present invention is installed at the air inlet of the cylinder, and the inner cone is trumpet-shaped. When the airflow passes through the cyclone separator, the airflow will change from linear motion to circular motion. Most of the swirling air flow spirals downward from the cylinder along the wall of the device and flows toward the cone. This is commonly referred to as an external swirl. The dust-containing gas generates centrifugal force during the rotation process, and the dust particles heavier than the gas are thrown to the wall of the container. Once the dust particles contact the wall, they lose the inertial force and fall along the wall by the momentum of the entrance velocity and the downward gravity, and enter the ash discharge pipe. When the rotating and descending external swirling airflow reaches the cone, it moves closer to the center of the dust collector due to the contraction of the cone, and its tangential velocity continues to increase. When the airflow reaches a certain position at the lower end of the cone, it reverses from the middle of the cyclone dust collector to the top in the same direction of rotation, and continues to flow in a spiral shape, that is, the internal swirling airflow. The cyclone separator provides upward power to the airflow, effectively cooling the high-temperature gas, and when it enters the inner cone, because the shape of the inner cone is large and the bottom is small, it can play a good buffering role, thus forming a cyclone separator entrance. The air pressure is high, and the air pressure inside the inner cone is low. Before the gas enters the filter bag dust removal device, the temperature is further cooled. Airflow temperature is reduced to reduce damage to the filter bag, thereby improving the safety performance of the device.

The technical solution of the present invention: the cyclone separator is located at 1/3 of the ash hopper close to the filter bag dust removal device.

By adopting the above technical solution, the cyclone separator of the present invention is located at the 1/3 place where the ash hopper is close to the filter bag dust removal device, which is the position with the best gas cooling effect.

The technical solution of the present invention: the corners of the guide pipe and the exhaust pipe are provided with guide vanes.

By adopting the above-mentioned technical solution, the deflector of the present invention prevents the vortex generated by the airflow at the sharp turn, resulting in poor airflow, loss of energy, and generation of noise.

The technical solution of the present invention: the air gyroscope is composed of multiple spiral blades.

By adopting the above technical scheme, the air gyro in the air gyro dust removal device of the present invention divides the airflow into multiple airflows under the action of multiple helical blades, and the dust particles in the airflow rotate along the cylinder wall at a high speed and move left to right with the airflow , and finally thrown into the dust bucket under the action of centrifugal force.

The technical solution of the present invention: the control system includes a PLC system, a temperature detection system and a differential pressure monitoring system.

By adopting the above technical scheme, the present invention adopts PLC control system to monitor the temperature difference and pressure difference inside and outside the filter bag in real time, which is not only easy to control, but also improves the safety performance of the equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, obtaining other drawings based on these drawings still belongs to the scope of the present invention without any creative effort.

Fig. 1 is the structural representation of composite fluidized dryer of the present invention;

Fig. 2 is the enlarged view of part A of Fig. 1 of the present invention;

Fig. 3 is the enlarged view of part B of Fig. 1 of the present invention;

Fig. 4 is a schematic cross-sectional view of the inner cone of the present invention.

In the figure, motor-1, blade-2, accelerator plate-3, guide tube-4, guide vane-5, air gyro-6, air inlet-7, inner cone-8, cylinder-9, Filter bag-10, pulse solenoid valve-11, pulse injection device-12, cage frame-13, venturi tube-14, flower plate-15, air outlet-16, exhaust pipe-17, differential pressure monitoring system- 18. Bag side thermometer-19, ash side thermometer-20, PLC system-21, ash hopper-22, dust collection tube-23, induced draft fan-24, flaring part-25, filter screen-26.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

As shown in Figure 1-3, a composite dust collector for a fluidized dryer includes a cyclone dust removal device, a filter bag dust removal device and a dust removal device arranged in the cylinder body 9 in order from low to high. The air gyro dust removal device on the left side of 9 and the air induction device arranged on the right side of the cylinder body 9; the air inlet 7 of the cylinder body 9 is arranged below the cylinder body 9, and is connected to the gas gyro dust removal device on the left side; the air outlet 16 of the cylinder body 9 It is arranged above the cylinder 9 and connected to the air induction device on the right; the cyclone dust removal device includes a cyclone separator, an inner cone 8 and a dust collection cylinder 23, and the ash hopper 22 is arranged at the cylinder air inlet 7 below the filter bag dust removal device The dust collection barrel 23 is set under the cylinder body 9; the filter bag dust removal device includes a flower plate 15, a filter bag 10 and a cage frame 13, the flower plate 15 is fixed on the cylinder body 9, and the filter bag 10 and the cage frame 13 are arranged on the flower plate 15. On the plate 15; the cleaning device includes a Venturi tube 14, a pulse injection device 12 and a pulse electromagnetic valve 11, the Venturi tube 14 is arranged on the upper end of the cage frame 13, the pulse injection device 12 is arranged on the top of the Venturi tube 14, and the pulse electromagnetic valve The valve 11 is arranged at the bottom of the pulse blowing device 12; the gas gyro dedusting device comprises a motor 1, an acceleration disc 3, blades 2, a draft tube 4, an air gyro 6 and a dust collection tube 23, and the motor 1 is arranged behind the acceleration disc 3 and is connected with the The blades 2 are connected together, the guide tube 4 connects the acceleration disk 3 and the cylinder air inlet 7, and the air gyro 6 is arranged in the guide tube 4; the air induction device includes an induced fan 24 and an exhaust pipe 17, and the exhaust pipe 17 The cylinder air outlet 16 is connected to the left and the air inlet of the induced draft fan 24 is connected to the right.

The composite dust collector for fluidized dryer in this embodiment also includes a control system, which includes a PLC system 21 , a temperature detection system (ash side thermometer 20 , bag side thermometer 19 ) and a differential pressure monitoring system 18 .

In this embodiment, the pulse injection device 12 is used for dust removal, which can realize automatic online dust removal at a certain frequency, with good dust removal effect, less wear on the filter bag, and enhanced safety and reliability of the equipment. The control system includes PLC system 21, temperature detection system (ash side thermometer 20, bag side thermometer 19) and differential pressure monitoring system 18; among them, the temperature detection system can measure the temperature of bag side and ash side to prevent damage due to excessive temperature filter bag, and prevent the dust from spontaneous combustion; the differential pressure detection system 18 can measure the pressure difference between the front and back of the filter bag 10, and prevent the fine dust attached to the filter bag from penetrating the filter bag into the air due to the excessive pressure difference on both sides of the filter bag to reduce the dust removal rate .

As a further improvement of the above-mentioned scheme, the inner cone 8 is set as a horn shape and the flared part 25 is provided with a filter screen 26, the filter screen 26 filters out part of the dust particles in the dust-laden airflow and reduces the pressure entering the filter bag dust removal device, extending the The service life of the filter bag 10; the 90° corners of the guide pipe 4 and the exhaust pipe 17 are provided with a deflector 5 to prevent the air flow from generating eddy currents at sharp turns, resulting in poor air flow, energy loss, and noise generation; The air gyro 6 in the air gyro dust removal device divides the airflow into multiple airflows under the action of multiple helical blades. The dust particles in the airflow rotate along the cylinder wall at high speed with the airflow and move left to right, and are finally thrown away under the action of centrifugal force. into the dust bucket 23; in the gas gyro dust removal device, the acceleration disc 3 is powered by the motor 1, which can provide multi-stage rotating speeds to adapt to different working conditions.

Specifically, the dusty airflow enters from the acceleration disk 3, and the blade 2 rotates at a high speed under the drive of the motor 1 so that the dusty airflow has a higher initial velocity. Under the action of a helical blade, it is divided into multiple airflows. The dust particles in the airflow rotate along the wall of the guide tube 4 at high speed and move left to right with the airflow. Throw it into the dust collecting bucket 23 to realize the first-stage dust removal; the dust-laden airflow after the first-stage dust removal enters the cyclone dust removal device tangentially from the cylinder air inlet 7, and the airflow rotates and descends along the outer surface of the inner cone cylinder 8. Under the action, the dust particles are thrown to the inner wall of the cylinder 9, and then relying on the gravity and the axial force of the external swirl flow, the larger dust particles fall into the dust collection tube 23 along the inner wall of the cylinder 9 to complete the second-stage dust removal; the dust-laden airflow When reaching the bottom of the cylinder 9, the airflow turns sharply upwards and passes through the filter 26 at the bottom of the inner cone 8, and the dust particles are blocked by the filter 26 and under the action of gravity to produce inertial sedimentation to achieve the third stage of dust removal; the dusty airflow continues to rise Entering the dust removal area of the filter bag, under the effects of screening, interception, collision, diffusion and electrostatic attraction of the filter bag 10, fine dust particles are attached to the surface of the filter bag 10, and then the pulse jet dust cleaning device 11 will adhere to the filter bag. The dust particles on the bag 10 are cleaned into the dust collecting bucket 23 to complete the fourth stage of dust removal, and finally the clean air is discharged from the air outlet 16 of the cylinder, and is discharged into the atmosphere along the exhaust pipe 17 under the action of the induced draft fan 24 .

In this embodiment, the dust-laden airflow in the gas gyro dust removal area and the cyclone dust removal area can effectively separate the large particle dust above 10 μm through the strong centrifugal force and the obstruction of the pipe wall of the draft tube 4 and the inner wall of the cylinder body 9 and the action of gravity, and make The high-temperature dust-laden air flow out of the fluidized dryer cools down, thereby reducing the workload of the filter bag 10 and the scouring effect of large particles of dust on the filter bag 10, effectively prolonging the cleaning cycle and the service life of the filter bag 10. The cyclone dust removal device is installed at the air inlet of the cylinder, and the inner cone is in the shape of a horn. When the airflow passes through the cyclone separator, the airflow will change from linear motion to circular motion. Most of the swirling air flow spirals downward from the cylinder along the wall of the device and flows toward the cone. This is commonly referred to as an external swirl. The dust-containing gas generates centrifugal force during the rotation process, and the dust particles heavier than the gas are thrown to the wall of the container. Once the dust particles contact the wall, they lose the inertial force and fall along the wall by the momentum of the entrance velocity and the downward gravity, and enter the ash discharge pipe. When the rotating and descending external swirling airflow reaches the cone, it moves closer to the center of the dust collector due to the contraction of the cone, and its tangential velocity continues to increase. When the airflow reaches a certain position at the lower end of the cone, it reverses from the middle of the cyclone dust collector in the same direction of rotation, from bottom to top, and continues to flow in a spiral shape, that is, the internal swirling airflow. The cyclone separator provides upward power to the airflow, and effectively cools down the high-temperature gas. When it enters the inner cone again, due to the shape of the inner cone, which is large and small at the bottom, it can play a good buffering role, thus forming a cyclone separator inlet. The air pressure is high, and the air pressure inside the inner cone is low. Before the gas enters the filter bag dust removal device, the temperature is further cooled. Airflow temperature is reduced to reduce damage to the filter bag, thereby improving the safety performance of the device.

In this embodiment, the bag side thermometer 19 and the ash side thermometer 20 measure and detect the temperature of the bag type dust removal area and the dust collection bucket 23 area respectively, so as to prevent the dust spontaneous combustion and high temperature damage to the filter bag 10 caused by the excessive temperature of the air flow; once the control system When over-temperature is detected, the PLC system 21 sends a control signal to open the electromagnetic pulse valve 11, and the compressed air in the pressure-stabilizing air bag of the pulse injection device 12 is sprayed to the filter bag 10, which can not only cool down but also make the accumulated The dust on the surface of the filter bag 10 falls off to achieve the dust removal effect.

In this embodiment, a dust removal device is provided above the bag-type dust removal device, and the dust removal device includes a Venturi tube 14, a pulse injection device 12 and an electromagnetic pulse valve 11, wherein the pulse injection device 12 is arranged above the filter bag 10 A number of blowing pipes and nozzles corresponding to 10 filter bags are provided. When cleaning is required, the PLC control system 21 sends a signal to the electromagnetic pulse valve 11 to open the valve, and the compressed air in the pressure-stabilizing air bag of the pulse blowing device 12 The air enters the blowing pipe, and is sprayed from the nozzle hole to the mouth of the filter bag 10. Each mouth of the bag is equipped with a trumpet tube. When the high-speed compressed air flows through it, a certain negative pressure is generated to make the clean air near the mouth of the bag As it enters the filter bag 10, it causes the filter bag 10 to swell outwards sharply and vibrate, so that the dust accumulated on the surface of the filter bag 10 falls off.

In this embodiment, the differential pressure detection system 18 detects the pressure difference inside and outside the filter bag 10. When the detected pressure difference reaches a preset value, the PLC system controls and sends a signal to open the electromagnetic pulse valve 11 for dust removal, and the dust attached to the filter bag The dust particles on the surface of the bag 10 are removed to achieve the dual effects of reducing pressure difference and cleaning dust.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (11)

1. A composite dust collector for a fluidized dryer, comprising a cyclone dust removal device, a filter bag dust removal device, a dust removal device and an air induction device, characterized in that it also includes an air gyro dust removal device and a cylinder, the cylinder The body is provided with an air inlet and an air outlet, the air inlet of the cylinder is arranged below the cylinder, the air outlet of the cylinder is arranged above the cylinder, the cyclone dust removal device, the filter bag dust removal device and The dust cleaning device is arranged in the cylinder body, the air gyro dust removal device is arranged on the left side of the cylinder body and connected with the air inlet, the described air induction device is arranged on the right side of the cylinder body and connected with the air outlet, and the air gyro dust removal device is arranged on the right side of the cylinder body and connected with the air outlet. The device includes a motor, an accelerator plate, blades, a guide tube, an air gyroscope and a dust collection tube. The motor is arranged behind the accelerator plate and connected with the blades. The guide tube feeds the accelerator plate and the barrel The mouth is connected, and the air gyroscope is arranged in the diversion tube. 2. The composite dust collector for a fluidized dryer according to claim 1, wherein the cyclone dust removal device comprises a cyclone separator, an inner cone, an ash hopper and a dust collection cylinder, and the The inner cone is arranged at the air inlet of the cylinder under the filter bag dust removal device, the cyclone separator and the inner cone are arranged in the ash hopper, and the dust collection bucket is arranged under the ash hopper. 3. A compound dust collector for a fluidized dryer according to claim 1, wherein the filter bag dust removal device includes a flower plate, a filter bag and a cage frame, and the flower plate is fixed on the cylinder On the body, the filter bag and the cage frame are arranged on the flower plate. 4. A kind of composite dust collector for fluidized dryer according to claim 1, characterized in that, said cleaning device comprises a Venturi tube, a pulse injection device and an electromagnetic pulse valve, and said Venturi The tube is arranged at the upper end of the cage, the pulse injection device is arranged above the barrel, and the electromagnetic pulse valve is arranged at the bottom of the pulse injection device. 5. A compound dust collector for a fluidized dryer according to claim 1, wherein the air-inducing device includes an air-inducing fan and an exhaust pipe, and the exhaust pipe includes a fan air inlet, The exhaust pipe is connected to the cylinder air outlet on the left and to the air inlet of the induced draft fan on the right. 6. A compound dust collector for a fluidized dryer according to any one of claims 1-5, characterized in that, the inner cone is in the shape of a horn, and the shape of the horn includes a flared portion and a The necking part, the flared part is provided with a filter screen. 7. A compound dust collector for a fluidized dryer according to claim 6, wherein the flared part is connected to the bottom of the filter bag dust removal device, and the necked part is connected to the cyclone separator connected, the cyclone separator is cylindrical with upper and lower openings, and the filter bag dust removal device and the cyclone dust removal device are on the same central axis. 8. A compound dust collector for a fluidized dryer according to any one of claims 2 or 7, wherein the cyclone separator is located at 1/3 of the ash hopper close to the filter bag dust removal device. 9. A compound dust collector for a fluidized dryer according to any one of claims 1-5, characterized in that guide vanes are provided at the corners of the guide pipe and the exhaust pipe. 10. A compound dust collector for a fluidized dryer according to any one of claims 1-5, characterized in that the air gyroscope is composed of multiple helical blades. 11. A control system for a composite dust collector for a fluidized dryer according to claim 1, wherein the control system includes a PLC system, a temperature detection system and a differential pressure monitoring system.