KR100479409B1 - Crusher System - Google Patents

Abstract

The present invention relates to a fine grinding system, a feed hopper 10 for supplying a grinding object to the screw conveyor 20, and a screw conveyor 20 for feeding the grinding object supplied from the supply hopper 10 to the grinder 30. ), A grinder 30 for crushing the pulverized object introduced, and a pulverizer feed amount control device 40 for controlling the pulverization load of the pulverizer by controlling the rotational speed of the screw conveyor 20 by detecting a change in the pulverization load of the pulverizer motor. ), A classifier 50 for classifying only powders of a desired particle size in the pulverized powder, a cyclone collector 60 for collecting and discharging the powder separated from the classifier 50 as a product; The bag filter type dust collector 70 collects and removes the remaining powder in the air used as the driving force of the system, and the output of the blower is corrected by detecting the differential pressure before and after filtration of the dust collector. Differential pressure control device 80 for uniformly controlling the blowing pressure of the entire system, and a blower for transporting the powder and providing a flow of air to be the driving force of the classifier 50, the collector 60 and the dust collector 70 ( 90), one or more transfer pipes, collectors and dust collectors, respectively, to prevent the powder from adhering to the inner wall, and the automatic vibration control device 110 for controlling the operation of the air vibrator 100. It consists of

Description

Crusher System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverization system, and more particularly, to a pulverization system for pulverizing a pulverized raw material into fine particles, classifying them, and collecting and discharging the air used for powder transportation.

Grinding system, especially pulverizing system, is a system that grinds the material composed of coarse particles into fine particles that can be used as a direct raw material for the production of various products. Food industry, polymer industry, polymers, metals, waste plastics, etc., which are used as raw materials for products, chemical industry, natural medicines, vitamins, herbs, etc. It is a system that is essentially used in the manufacturing process of the feed industry which finely differentiates materials such as food waste and uses them as raw materials of products, and the cosmetics industry which finely differentiates materials such as pigments, mud and loess as raw materials of products.

Such a grinding system is classified into a closed circuit system that performs a classification process using a classifier according to whether a classifier is used and an open circuit system that directly produces a product without a classification process. As such, the pulverization system mainly used in industrial fields requiring precision is a closed circuit system that performs a classification process using a classifier.

Referring to Figure 1 looks at the general process of the fine grinding operation is performed in such a closed circuit grinding system as follows.

First, as shown in FIG. 1, the grinding object is transferred from the feed hopper 1 through the screw conveyor 2 and introduced into the grinder 3, and the grinding object introduced into the grinder 3 rotates at a high speed. It is discharged after being crushed by the action of the saw blade of the impeller and the ring gear.

Next, the powder pulverized and discharged from the pulverizer 3 is classified into a classifier 4 which classifies only micron fine powder in the powder along the flow of air generated by the suction pressure of the blower 7. Inflow.

The classifier 4 of the general crushing system is equipped with an impeller rotating by a motor perpendicularly to the center, and rotates so that large and heavy coarse powders that pass through are separated and dropped by centrifugal force, and small and fine fine air flows. Follow the principle of transfer to the next process. The coarse powder separated and dropped is usually fed back to the feed hopper 1 for regrinding.

Here, the average particle size of the fine powder classified by the classifier 4 is adjusted by increasing or decreasing the rotational speed of the impeller. As the rotational speed of the impeller increases, the centrifugal force increases so that only finer powder is passed through to the next process.

Next, the fine powder transferred from the classifier 4 flows into the cyclone type collector 5 and is collected by the action of rotating and settling the particles by centrifugal force and gravity, and then discharged to the product through the lower rotary valve. do.

The airflow that rotates, settles, and drops the fine powder as a product while passing through the cyclone collector 5 is still discharged with a considerable amount of fine powder. In order not to pollute the outside air, the fine particles as impurities contained therein must be removed. .

It is the dust collector 6 which plays such a role, and usually the bag filter type dust collector which uses a filtration method is used.

As shown in FIG. 2, the bag filter dust collector includes a filter cloth 61 so as to protrude downward from the dust collector separated into upper and lower portions, and allows air containing powder to flow from the inlet port 62 provided at the lower portion thereof. It is a dust collector using a method of purifying while passing through the filter cloth (61) and discharged to the upper discharge port (63).

In such a bag filter type dust collector, a filter filter pore is clogged after inevitably performing a filtration operation for a predetermined time. A method used to prevent this is a diaphragm valve 64. It is a so-called Pulse Jet method that periodically sprays back compressed gas to drop the dust layer blocking the filter cloth 61.

Thus, the dust removed by performing filtration and periodic back injection is discharged through the rotary valve under the dust collector, and the air which served as a carrier of the fine powder transport is finally purified and discharged through the blower 7.

On the other hand, the driving force for driving the grinding system and the carrier of the powder is provided from the blower 7, in general, the blower 7 is installed at the rearmost part of the grinding system to provide suction to the system. As a result, the powder is transported and the driving force is provided to the classifier 4, the collector 5, and the dust collector 6.

The pulverization system configured in this way exhibits large and small problems in various sectors in actual operation. For example, in order to maintain the classification efficiency of the classifier and improve the quality of the produced product, the amount of powder supplied from the grinder to the classifier is increased. The amount of feedback from the pulverized raw material and the classifier supplied to the pulverizer must be constant for this purpose. In practice, the amount of feed supplied from the crusher is different from the beginning, the middle and the end of the pulverizer, thereby reducing the classifier efficiency and the resulting product. It is a factor of unevenness and quality deterioration.

In addition, when the size of the powder particles is less than 30㎛, the powder has a large effect (Van Der Walls Force), capillary force due to moisture, electrostatic force, etc. When the attraction between the powder particles increases, the transfer, The build up phenomenon occurs due to the sticking of powder on the inner wall of pipe, classifier, collector, dust collector, etc., which acts as a trouble factor in powder transportation This makes the air flow unstable and consequently causes the quality of the product to deteriorate.

Conventionally, dropping using an air knocker, a magnet vibrator, or even a hammer has been generally performed to prevent such powder adhesion, but these methods are performed by an operator. It has been done in part by the subjective experience of the company, but it was inefficient or sometimes overlooked.

In addition, as described above, the bag filter dust collector used in the pulverization system uses a method of dropping the powder blocking the pores of the filter cloth by periodically back spraying the compressed air, even if such a pulse jet method is used As time passes, deposits accumulate in the pores of the filter cloth, and thus, a wind pressure loss of the blower is generated, and thus, the wind pressure and air volume of the system are lowered, and thus the quality of the final product cannot be completely prevented from being lowered.

Therefore, by maintaining a constant amount of material supplied to the classifier even at the beginning, middle and end of grinding, it is possible to maintain the classification efficiency of the classifier and thereby to uniform the quality of the produced product, and to improve the inner wall It prevents troubles in the transportation of powder by preventing the build up phenomenon by sticking the powder inside the device such as air supply, collector, dust collector, etc. In the case of using the pulse jet method, deposits are deposited on the pores of the filter cloth as time passes, and thus, the appearance of a crushing system capable of preventing the wind pressure and the air volume from changing due to the wind pressure loss of the blower is urgently needed.

The present invention is to overcome the problems of the prior art, the object of which is to maintain a constant classifying efficiency of the classifier by maintaining a constant amount of material supplied to the classifier even at the beginning, middle and end of grinding The quality of the produced product can be made uniform, and it prevents the build up phenomenon by sticking the powder to the inside wall of the transfer pipe, the classifier, the collector, the dust collector, etc. By removing the factors, it is possible to maintain a constant wind pressure and air volume of the driving force of the system, and as the time passes when using the pulse jet method, deposits are deposited on the pores of the filter cloth. It is to provide a grinding system that can be prevented.

The present invention for this purpose is a feed hopper 10 for supplying a grinding object to the screw conveyor 20, a screw conveyor 20 for feeding the grinding object supplied from the supply hopper 10 to the grinder 30, and the input grinding A pulverizer supply amount control device 40 for uniformly controlling the pulverization load of the pulverizer by controlling the rotational speed of the screw conveyor 20 by detecting a change in the pulverization load of the pulverizer motor and a pulverization object for crushing the object; A classifier 50 for classifying only powders of a desired particle size in the pulverized product, a cyclone collector 60 for collecting and discharging the powder separated from the classifier 50 as a product, and used as a driving force of the system The bag filter dust collector 70 collects and removes the remaining powder in the discharged air, and changes the differential pressure before and after filtration of the dust collector to correct the output of the blower. A differential pressure control device 80 for uniformly controlling the blowing pressure, a blower 90 for transporting the powder and providing a flow of air that is a driving force of the classifier 50, the collector 60, and the dust collector 70, and the transfer. One or more tubes, collectors, and dust collectors are provided, each of which comprises an air vibrator 100 for preventing the powder from adhering to the inner wall, and an automatic shaking control device 110 for controlling the operation of the air vibrator 100. Providing a grinding system.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverization system, specifically, in a pulverization system in which a pulverized raw material is pulverized into fine particles, classified, and collected and discharged by collecting and collecting the air used for transporting the powder. The present invention relates to a pulverization system capable of maintaining a constant amount of powder, maintaining a constant flow rate of air used for transporting powder, and preventing sticking of fine powder on the inner wall of the system piping and accessories.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, but the present invention is not intended to be limited thereto.

3 is a schematic view showing a pulverization system of the present invention, Figure 4 is a block diagram showing the operation of the pulverizer supply amount control device of the pulverization system of the present invention, Figure 5 is the operation of the dust collector differential pressure control device of the pulverization system of the present invention Fig. 6 is a block diagram showing the configuration of the automatic deceleration control apparatus in the pulverization system of the present invention.

As shown in FIG. 3, in the grinding system of the present invention, a hopper 10 for supplying a grinding object to the screw conveyor 20 and a grinding object supplied from the supply hopper 10 are introduced into the grinder 30. A mill feed amount for uniformly controlling the mill load of the mill by controlling the rotational speed of the screw conveyor 20 by detecting a change in the mill load of the screw conveyor 20, a mill 30 for milling the milled object, and a mill load of the mill motor. A control device 40, a classifier 50 for classifying only the powder having a desired particle size among the pulverized powders, and a cyclone type collector for collecting and discharging the powder separated from the classifier 50 as a product ( 60), a bag filter dust collector 70 which collects and removes the remaining powder in the air used as the driving force of the system, and detects the differential pressure change before and after the filtration of the dust collector, and reports the output of the blower. And a differential pressure control device 80 for uniformly controlling the blowing pressure of the entire system, and a blower for transporting the powder and providing a flow of air that is a driving force of the classifier 50, the collector 60, and the dust collector 70. 90, one or more transfer tubes, collectors, and dust collectors, each of which is provided with an air vibrator 100 for preventing powder from adhering to an inner wall, and an automatic vibration control device for controlling the operation of the air vibrator 100 ( 110).

In view of this, the pulverization system of the present invention is configured to further control the pulverizer supply amount of the pulverizer in a general closed circuit pulverization system, so that the amount of the pulverized material supplied to the pulverizer does not change with the change of time such as the beginning, the middle and the end of the pulverization. As a result, the amount of material supplied to the classifier is kept constant, and accordingly, the classifying efficiency of the classifier is made constant, thereby making it possible to equalize the quality of the produced product.

In addition, the present invention further comprises a differential pressure control device for controlling the differential pressure before and after the filtration of the dust collector in a general closed circuit pulverization system, the deposit is deposited on the pores of the filter cloth as time passes when using the pulse jet method in the dust collector, and thus the pressure before and after filtration It can also be said that the wind pressure loss of the blower is caused by the car to prevent the wind pressure and the amount of wind, which are driving forces, from changing.

In addition, the present invention further comprises an air vibrator and a control device for dropping the powder that can be attached to the inner wall provided in the transfer pipe, the collector and the dust collector in a general closed circuit grinding system, the inner wall, classifier, collector, By preventing the build-up of powder by sticking to the inside of dust collector and other devices, it is possible to eliminate the troubles in the transportation of powder and to maintain a constant wind pressure and air flow rate due to the driving force of the system. At the same time, it can be said that it wanted to automatically control such dropping operation.

Hereinafter, the grinding system of the present invention as described above in more detail.

In the present invention, the supply hopper 10 for supplying the grinding object to the screw conveyor 20 is loaded with the grinding material and at the same time supplying the loaded grinding material at a constant speed and amount to the lower end of the screw conveyor 20 grinder 30 As a function of maintaining a constant grinding load of, the coarse powder which is not classified as a product in the classifier 50 after grinding is discharged to the supply hopper 10 for regrinding and used as a grinding material again.

The screw conveyor 20 is a conveying device for supplying the pulverized material supplied from the feed hopper 10 at a constant speed and amount to the pulverizer 30. The screw conveyor 20 is driven by a screw conveyor motor, and the pulverized material supplied to the lower end is screwed. Move to the upper end in accordance with the rotation of the grinder 30 is injected into the inlet.

The pulverizer 30 is a device for pulverizing the pulverized object supplied from the screw conveyor 20 into fine powder. The pulverizer 30 is sheared by frequent collision of particles by a turbulence formed between a high-speed rotating impeller and a sawtooth shape. The first grinding zone, the second grinding zone mainly for pulverizing the fibrous raw material by cutting ribs, and the third grinding for inducing self grinding by perturbing and colliding particles in a semicircle at high speed. It is comprised by the area | region, and is driven by the grinder motor whose output is controlled by the grinder supply quantity control apparatus 40. FIG.

Such a grinder 30 is configured with an air inlet 31 through which air to be used for blowing air, which is a driving force or a carrier of the entire system, is introduced.

The pulverizer supply amount control device 40 controls the pulverization load of the pulverizer 30 by controlling the amount of the pulverizing material supplied to the pulverizer 30 not to change according to the time change such as the beginning, the middle and the end of the pulverization. The current sensor 41 which detects the load applied to the grinder motor and the signal output from the current sensor 41 are compared with the input value which the operator designates and stored in the memory and are previously input into the memory according to the difference. The microprocessor 42 which selects a correction signal from the correction table and transmits it to the inverter of the screw conveyor 20 motor to adjust the output of the motor and activates an alarm device when an overcurrent is detected. The operator inputs the desired grinder motor load, and the operator can determine the load of the grinder and the speed of the screw conveyor 20. Operating panel (43) to display (Display), and a simple device configured to include a warning device 44 that warns with a signal such as a buzzer, a warning light that can be recognized by the operator when an overcurrent of a certain value is detected. It has a structure.

As illustrated in FIG. 4, the grinder feed amount control device 40 configured as described above has a load detection sensor, that is, a current sensor 41 that detects the current of the grinder motor that changes according to the load, and thus, inputs a microprocessor of 1-5V. After converting the signal into a possible signal and inputting it to the microprocessor 42, the microprocessor 42 compares and subtracts it from the input value which the operator has previously set using the operation panel 43 and stored in the memory. The correction signal corresponding to the difference value is detected from the previously stored correction table and transmitted to the inverter of the screw conveyor 20 motor to raise or lower the power value applied to the motor, thereby rotating the screw conveyor 20. By increasing or decreasing the speed, the amount of raw material introduced into the grinder 30 increases or decreases, thereby operating the grinder 30. It is to calibrate the input value same as the input value. At this time, when an overcurrent of a predetermined value or more is detected, the microprocessor 42 warns by a signal such as a buzzer, a warning light, etc. that can be recognized by an operator using the alarm device 44.

The classifier 50 which classifies only the powder of the desired particle size among the grind | pulverized grind | pulverization is equipped with the impeller rotating by a motor perpendicularly to the center, and rotates, and the big and heavy coarse powder in the powder passing through is separated by centrifugal force, Dropping is discharged and small and light fine powder is used to transfer to the next process along the air flow, the coarse powder separated and dropped is fed back to the feed hopper 10 for regrinding.

The average particle size of the fine powder classified by the classifier 50 depends on the rotational speed of the impeller and the ratio of the blowing speed and the pressure of the blower driving the system.As the rotational speed of the impeller is relatively larger than the blowing speed of the blower, the centrifugal force As it becomes larger, only finer powder is passed through to the next process, and thus the particle size of the product produced in the next process, the classifier 50, is smaller.

The applicant of the Republic of Korea Patent Application No. 1999-52693 in the interior of the primary classification chamber constitutes a separating member for separating the moving path of the falling particles and the rising fine powder to the outside and the inside, the lower portion of the primary classification chamber There has been filed a pulverizer comprising an eyepiece member that guides the air flowing through the second air inlet to be distributed and rises in a balanced manner without colliding at the upper part of the secondary classification chamber. I wanted to increase.

The collector 60 which collects the powder separated from the classifier 50 and discharges it as a product is used as the cyclone type | mold, The particle | grains are collect | collected by the effect which the particle rotates and sediments by centrifugal force and gravity. As the product is discharged through the lower rotary valve, two or more collectors may be used to increase the collection efficiency in some cases.

The bag filter type dust collector 70 for dust collection and removal of residual powder in the air used as a driving force and a carrier of the system passes through the cyclone collector 60 as described above to rotate, settle, and drop the fine powder as a product. In order not to pollute the outside air by removing a considerable amount of fine powder still contained in the air stream, a bag filter method using a filter cloth is used.

In the present invention, the bag filter dust collector 70 is provided with a filter cloth so as to protrude downward from the dust collector separated into the upper and lower and purged while flowing the air containing the powder from the inlet provided in the lower through the filter cloth In order to prevent the clogging of the pores of the filter cloth after performing the filtration work for a predetermined time, the filter cloth is sprayed by periodically back spraying the compressed gas by using a diaphragm valve. Pulse Jet method was used to remove the blocking dust layer.

On the other hand, even if the pulse jet method of dropping the powder blocking the pores of the filter cloth by periodically back spraying the compressed air in this way, deposits deposit on the pores of the filter cloth as time passes, thereby reducing the wind pressure loss of the blower. It is not possible to completely prevent the deterioration of the quality of the final product by the wind pressure and the amount of air generated by the system is reduced, in the present invention by using a differential pressure control device 80 to uniformly control the differential pressure before and after filtration of the dust collector Such reduction in wind pressure / wind speed can be automatically corrected.

The dust removed by performing the filtration and periodic back injection is discharged through the rotary valve under the dust collector 70, and the air serving as a carrier of the driving force of the system and the fine powder transport is finally purified to blow the blower 90. It is discharged through.

In the present invention, the differential pressure control device 80 detects the pressure difference before and after the filter cloth, compares the differential pressure with a predetermined input value, and adjusts the blowing pressure of the blower according to the result to uniform the wind pressure and the wind speed of the entire system. In order to maintain the pressure, the differential pressure sensor (81) comprising an internal pressure sensor and an external pressure sensor for detecting the pressure before and after the filter cloth, and the input value stored in the memory by the operator to specify the signal output from the differential pressure sensor (81) Compared with, and selects the correction signal from the correction table previously input into the memory and transmits it to the inverter of the blower motor 90 to adjust the output of the motor. When the microprocessor (82) to activate the alarm device, the operator can input the desired differential pressure and the operator can determine the differential pressure and the speed of the blower (90) motor It includes an operating panel (83) for displaying a display, and an alarm device (84) for warning by a signal such as a buzzer, a warning light, etc., which can be recognized by an operator when an overpressure of a predetermined value or more is detected. do.

As shown in FIG. 5, the differential pressure control device 80 of the present invention configured as described above has a differential pressure sensor 81 that detects the differential pressure before and after filtration that changes as the system driving time elapses, and thus, the microprocessor of 1-5V. After converting it into an inputtable signal and inputting it to the microprocessor, the microprocessor compares and subtracts it with the input value previously set by using the operation panel and stored in the memory and then pre-corrects the correction signal corresponding to the difference value. It is detected from the stored correction table and transmitted to the inverter of the blower 90 motor to increase or decrease the power value applied to the motor, and thus increase or decrease the blow pressure of the blower by increasing or decreasing the rotational speed of the motor. Operating in a manner that results in an input that sets the wind pressure and wind speed that are the driving force and carrier of the entire system. It is corrected to the same value. At this time, when the over differential pressure is detected, the microprocessor warns the user with a signal such as a buzzer, a warning light, etc. that can be recognized by an operator using an alarm device.

The blower 90 provides a driving force for driving the grinding system configured as described above and serves as a carrier of the powder. In the present invention, the blower 90 is provided at the rearmost portion of the grinding system. By providing suction to the system, it transports the powder and provides driving force to the classifier 50, the collector 60, and the dust collector 70, and at one side thereof, an air outlet 91 for discharging used air. Is composed.

In the present invention, the air vibrator 100 for preventing the powder from adhering to the inner wall, by using the principle of injecting air at a high pressure to rotate the rotating body and vibrating the portion to which the rotating body is to drop, the transfer pipe, One or more are provided in the predetermined position of the outer wall of a collector and a dust collector, especially an outer wall, such as a narrowing part or a bent part of an apparatus and a pipe | pipe.

Such an air vibrator 100 is automatically controlled by the automatic shake control device 110. The configuration of the automatic shake control device 110 is illustrated by using a grinder system equipped with six air vibrators 100 as an example. 6 is shown.

As shown in FIG. 6, the automatic shaking control apparatus 110 includes an operation panel 112 for setting a period and time for the user to drop by a manual operation, and a user's input through the operation panel 112. The microprocessor 111 generates a display control signal of the operation control command and the control period and the solenoid valve operation time after setting the dropping control period and the solenoid valve operating time according to the command, and is generated by the microprocessor 111. A solenoid valve driver 113 for controlling the driving of the air supply solenoid valve for operating the air vibrator 100 in response to an operation control command, and a dropping period in accordance with a display control signal generated by the microprocessor 111; It includes a liquid crystal display (LCD) for displaying the time on the screen.

The automatic shaker device of the present invention uses a microprocessor 111 to perform an operation, thereby enabling precise timing control compared to a circuit method using a conventional resistor and capacitor, and a digital program method. It is possible to change the drop period and time of the air vibrator 100 according to the purpose according to the adhesion degree of the powder by setting the time, and also by using the contactless element of the voltageless contact method using the solenoid valve, thereby making the electrical noise It is possible to minimize the occurrence, and the LCD which can check the user's designated value and various parameters of the device facilitates the use and widens the control quantity to be dropped at the same time.

The pulverization system of the present invention configured as described above is finely pulverized by uniformly pulverizing the pulverization object by operating as follows.

First, the object to be crushed is transferred from the feed hopper 10 through the screw conveyor 20 to the crusher 30, and the crushed object introduced to the crusher 30 is a saw blade of an impeller and a ring gear rotating at a high speed. It is crushed by the action and then discharged.

At this time, the amount of pulverized raw material is added to the pulverizer by the pulverization load control device 40 of the pulverizer 30 is properly adjusted so that the pulverizer 30 always performs a uniform pulverization operation with a constant load amount.

Next, the powder that is pulverized and discharged from the grinder 30 is a classifier that classifies only micron fine powder in the powder by using the flow of air generated by the suction pressure of the blower 90 as a driving force or carrier. Flows into (50).

In the classifier 50, a large and heavy coarse powder in the passing powder is separated and dropped by centrifugal force to be discharged, and small and light fine powder is transferred to the next process along the airflow, so that only particles of a desired size are collected in the next step. The coarse, which is transferred to (60), separated, dropped and discharged is usually fed back to the feed hopper 10 for regrinding.

Here, the average particle size of the fine powder classified by the classifier 50 is adjusted by increasing or decreasing the rotation speed of the impeller. As the rotation speed of the impeller increases, the centrifugal force increases so that only finer powder is passed through to the next process.

Next, the fine powder transferred from the classifier 50 flows into the cyclone type collector 60 and is collected by the action of rotating and sedimenting the particles by centrifugal force and gravity, and then discharged to the product through the lower rotary valve. do.

Next, the air used and discharged as a driving force or a carrier is provided with a filter cloth so as to protrude downward from the dust collector separated into the upper part and the lower part, and the air containing the powder is introduced from the inlet provided at the lower part and purified while passing through the filter cloth. After purifying by passing through the bag filter dust collector 70 using a method of discharging to the outlet of the discharged.

At this time, the pressure before and after the filter cloth of the dust collector 70 is kept constant by the differential pressure control device 80 will be able to be driven at a constant wind speed and wind pressure at all times.

In addition, the filter cloth clogging phenomenon, which is inevitably generated after performing a filtration operation for a predetermined time in the bag filter type dust collector, uses a diaphragm valve to periodically inject back compressed gas to prevent dust from clogging the filter cloth. It is prevented by the pulse jet method of dropping.

The dust removed by performing the filtration and periodic back injection is discharged through the rotary valve under the dust collector 70, and the air serving as a carrier for the fine powder transport is finally purified to discharge the air outlet 91 of the blower 90. It is discharged through.

In this way, a driving force for driving the grinding system and a carrier of the powder are provided from the blowing fan 90 installed at the rearmost part of the grinding system to give suction to the system.

On the other hand, the air vibrator 100 which is provided at each one or more on the outer wall of the predetermined position of the outer wall of the conveying pipe, the collector and the dust collector, in particular, the narrowing portion or the bent portion of the device or pipe, the powder is attached to the inner wall This prevents the transportation of the powder from being disturbed or the wind pressure and wind speed that drive the entire system. The operation of the air vibrator 100 is controlled by the automatic deceleration control device 110 according to the user's input value. It is done automatically.

As the present invention is completed as described above, the screw feeder 10 for feeding the grinding object to the screw conveyor 20 and the screw conveyor 20 for feeding the grinding object supplied from the supply hopper 10 into the grinder 30. And a pulverizer supply amount control device 40 for uniformly controlling the pulverization load of the pulverizer by controlling the rotation speed of the screw conveyor 20 by detecting a change in the pulverization load of the pulverizer motor and a pulverizer 30 for pulverizing the input pulverization object. And a classifier (50) for classifying only powders of a desired particle size in the pulverized powder, a cyclone collector (60) for collecting and discharging the powder separated in the classifier (50) as a product. The bag filter dust collector 70 collects and removes the remaining powder in the discharged air, and the output of the blower is corrected by detecting the change of the differential pressure before and after filtration of the dust collector. A differential pressure control device 80 for uniformly controlling the blowing pressure of the entire system, and a blower 90 for transporting the powder and providing a flow of air to be the driving force of the classifier 50, the collector 60, and the dust collector 70. ), A conveying pipe, a collector and a dust collector, each of which is provided with at least one air vibrator (100) to prevent the powder from adhering to the inner wall, and automatic vibration control device 110 for controlling the operation of the air vibrator (100) It is possible to provide a grinding system consisting of.

By the completion of the present invention, by maintaining a constant amount of material supplied to the classifier even at the beginning, middle and end of the grinding, it is possible to maintain the classification efficiency of the classifier and thereby to uniform the quality of the produced product, It prevents the buildup phenomenon of powder by sticking inside the device such as the inner wall, classifier, collector, dust collector, etc. of the system, and eliminates the troubles in the transportation of the powder, thereby reducing the wind pressure and air volume that are the driving force of the system. A pulverization system can be provided that can be kept constant, and deposits adhere to the pores of the filter cloth as time passes in the use of the pulse jet method, thereby preventing wind pressure loss of the blower, thereby preventing fluctuations in wind pressure and air volume. It is.

1 is a schematic view showing a general closed circuit grinding system;

2 is an internal configuration diagram showing a general bag filter dust collector,

3 is a configuration diagram schematically showing the present invention grinding system,

Figure 4 is a block diagram showing the operation of the grinder feed amount control apparatus of the present invention grinding system,

Figure 5 is a block diagram showing the operation of the dust collector differential pressure control device of the present invention grinding system,

Figure 6 is a block diagram showing the configuration of the automatic shake control device of the present invention grinding system.

<Explanation of symbols for the main parts of the drawings>

10: feed hopper 20: screw conveyor

30: grinder 31: air inlet

40: grinder feed amount control device 41: current sensor

42: microprocessor 43: operation panel

44: alarm device 50: classifier

60: collector 70: dust collector

80: differential pressure control device 81: differential pressure sensor

82; Microprocessor 83: Control Panel

84: alarm device 90: blower

91: air outlet 100: air vibrator

110: automatic shaking control device 111: microprocessor

112: operation panel 113: solenoid valve drive unit

Claims (4)

A feed hopper 10 for supplying a grinding object to the screw conveyor 20, a screw conveyor 20 for feeding the grinding object supplied from the supply hopper 10 to the grinder 30, and a grinder for grinding the injected grinding object 30, a grinder feed amount control device 40 for uniformly controlling the mill load of the mill by detecting the change in the mill load of the mill motor and controlling the rotational speed of the screw conveyor 20, and the desired particles in the milled mill A classifier 50 for classifying only the powder of size, a cyclone collector 60 for collecting the powder separated from the classifier 50 and discharging it as a product, and remaining in the air used and discharged as a driving force of the system The bag filter type dust collector 70 which collects and removes dust to be collected and the pressure of the blower are corrected by detecting the change in the differential pressure before and after filtration of the dust collector to uniformly blow air pressure of the whole system. Control the differential pressure control device 80, and the blower 90, the conveying pipe, the collector and the dust collector for transporting the powder and providing a flow of air that is the driving force of the classifier 50, the collector 60 and the dust collector 70 Characterized in that the air vibrator 100 is provided with one or more at each to prevent the powder from being attached to the inner wall, and the automatic vibration control device 110 for controlling the operation of the air vibrator 100, Grinding system. The method of claim 1, The grinder supply amount control device 40 compares the current sensor 41 for detecting the load applied to the grinder motor and the signal output from the current sensor 41 with an input value designated by the operator and stored in the memory, and the difference thereof. By selecting the correction signal from the correction table (Table) previously input into the memory and transmitting it to the inverter of the screw conveyor 20 motor to adjust the output of the motor. A microprocessor 42 for operating, an operating panel 43 for inputting a desired grinder motor load, and displaying the load of the grinder and the speed of the screw conveyor 20 so that the operator can understand the load; Including an alarm device 44 that warns with a signal such as a buzzer, a warning light, etc. that an operator can recognize when an overcurrent is detected. Characterized by Grinding system. The method of claim 1, The differential pressure control device 80 includes a differential pressure sensor 81 composed of an internal pressure sensor and an external pressure sensor that detects the pressure before and after the filter cloth, and a signal output from the differential pressure sensor 81 by a worker and stored in a memory. Compared with the input value and selects the correction signal from the correction table previously input in the memory according to the difference and transmits it to the inverter of the blower motor 90 to adjust the output of the motor. When detected, a microprocessor 82 for operating an alarm device, an operator panel for inputting a desired differential pressure and displaying the differential pressure and the speed of the blower 90 motor so that the operator can understand the speed. , And an alarm device 84 that warns with a signal such as a buzzer, a warning light, etc., which can be recognized by an operator when an overpressure exceeding a predetermined value is detected. Grinding system. The method of claim 1, The automatic dropping control device 110 includes an operation panel 112 for setting a period and time for the user to drop by manual operation, and a drop control period according to a user's command input through the operation panel 112. And a microprocessor 111 for generating an operation control command and a display control signal for the control period and the solenoid valve operation time after setting the solenoid valve operation time, and in response to the operation control command generated by the microprocessor 111. The solenoid valve driving unit 113 for controlling the operation of the solenoid valve for supplying the air to operate the vibrator 100 and the drop period and time are displayed on the screen according to the display control signal generated by the microprocessor 111. Characterized in that it comprises a liquid crystal display (LCD), Grinding system.