JP3693727B2 - Vibration type dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dryer used in a drying process, for example, when a gel or semi-solid processed product is made into powder, and in particular, a vibration type dryer that vibrates a processed product to be dried and moves the inside of the dryer. It is about.
[0002]
[Prior art]
In recent years, a polymer compound in a granular or powder form has been used in many fields. For example, a granular polymer flocculant is convenient and frequently used for agglomeration and dehydration of organic sludge produced by sewage and human waste treatment.
As an example of producing such a granular or powdery polymer material, an example of a method for producing a water-soluble polymer compound will be described.
First, a photopolymerization initiator is added to a predetermined monomer aqueous solution whose pH is adjusted, and polymerization is performed by irradiation with an ultraviolet lamp to prepare a semi-solid polymer material. Thereafter, a powdery polymer material is produced through a coarse crushing step, a drying step, a crushing step, and the like.
[0003]
By the way, in the drying process, a vibratory dryer is often used for reasons such as high drying efficiency. An example of this vibration type dryer is shown in FIG.
The vibration type dryer 10 shown in FIG. 4 is configured by connecting three vibration type dryers, that is, a first vibration type dryer 12, a second vibration type dryer 14, and a third vibration type dryer 16. However, basically, all the vibratory dryers 12, 14, and 16 are the same, and only one or four or more may be used as necessary.
The first vibratory dryer 12 includes a heat-insulating housing 18, a net 20 provided in the housing 18, a plurality of hot air blowing devices 22 disposed below the net 20, and a net above the net. A plurality of arranged air exhaust devices 24, an inlet 26 provided at one end portion of the housing 18 to input a processed product to be dried, and provided at the other end portion of the housing 18 to discharge the processed product. A discharge port 28 is schematically configured.
[0004]
The net 20 is used to place a processed product to be dried, and is a net-like material having heat resistance and durability, and the mesh is set so that the processed product to be dried cannot pass through.
Further, although not shown in the figure, the housing 18 is provided with a vibration device, which vibrates finely in the vertical direction. Due to this vibration, the processed material put on the net 20 is moved from the front end (input port side 26) to the rear end. Move to (discharge port 28 side).
A dispersion plate 30 formed by combining inclined plate surfaces at the front end portion of the net 20 and below the input port 26 so as to uniformly disperse the processed material to be charged and prevent it from staying. Is provided.
The hot air blowing device 22 is substantially constituted by a blowout port 34 and a hot air controller 32 that controls the blowout port 34, and the warm air blown from the blowout port 34 passes through the mesh of the net 20 and is processed on the net. Is heated and dried.
[0005]
Similarly, the second vibratory dryer 14 also has a schematic configuration in which a net 20 provided with a dispersion plate 30 at the front end, a hot air blowing device 22 and an air exhaust device 24 are arranged in a housing 18 ′. In addition, the third vibration type dryer 16 is also schematically configured by arranging a net 20, a hot air blowing device 22, and an air exhaust device 24 in a housing 18 ''.
Further, the discharge port 28 of the first vibration type dryer 12 and the input port 40 of the second vibration type dryer 14 are connected by a pipe 36, and a cyclone 38 is interposed between the pipe 36 and the input port 40. ing. The discharge port 42 of the second vibration type dryer 14 and the input port 44 of the third vibration type dryer 16 are directly connected.
[0006]
In the vibration type dryer 10 shown in FIG. 4, a semi-solid processed material is first supplied from the left side of FIG. 4 to the input port 26 of the first vibration type dryer 12.
Then, the processed product dropped from the charging port 26 onto the dispersion plate 30 provided at the front end portion of the net 20. The processed material dropped on the dispersion plate 30 is dispersed and dropped on the front end portion of the net 20 along the slope of the dispersion plate 30. The net 20 vibrates, and the processing object placed on the net 20 is shaken by the vibration and gradually moves backward, and is discharged out of the housing 18 through the discharge port 28. The inside of the housing 18 is in a high temperature state by the hot air from the hot air blowing device 22, and the processed material is dried while moving in the housing 18.
[0007]
The processed product discharged from the first vibration type dryer 12 falls on the dispersion plate 30 of the net 20 through the cyclone 38 from the inlet 40 of the second vibration type dryer 14. In the second vibration type dryer, the same drying treatment as that of the first vibration type dryer 12 is performed, and subsequently, the processed material discharged from the discharge port 42 is supplied from the input port 44 of the third vibration type dryer to the third vibration type dryer. It is placed on the net 20 of the dryer 16, shaken by vibration while being heated, and discharged from the discharge port 46 to the outside.
Thereafter, the processed product discharged from the discharge port 46 is subjected to a subsequent process such as a pulverization process, and becomes granular or powdery.
[0008]
[Problems to be solved by the invention]
The polymer material is preferably dried as uniformly as possible until a predetermined degree of dryness is obtained. In the vibration-type dryer as described above, the polymer material to be dried is uniformly distributed and the thickness of the layer to be processed is reduced. It is important to place it on the net with a constant height.
Factors that determine the degree of drying in the vibratory dryer 10 include drying time, that is, the transfer speed of the processed material, adjustment of the warm air and the exhaust device 24 by the hot air blowing device 22, and the layer thickness of the processed material. There is.
Usually, these plural factors are set before the operation of the dryer is started, so that it is not necessary to finely adjust the degree of drying of the processed product.
[0009]
The present invention has been made to solve the above-described problems, and provides a vibration type dryer that dries a processed product to a desired degree while having a simple configuration.
[0010]
[Means for Solving the Problems]
The vibration type dryer of the present invention is provided with a housing in which an input port into which a processed product to be dried is input is formed in the front portion and an exhaust port through which the processed product is discharged is formed in the rear portion, and the housing. A vibratory dryer having a net for transferring the processed material from the inlet to the outlet while vibrating, and a temperature control means for heating the inside of the housing,
(1) A distributor that makes the layer thickness of the workpiece placed on the net constant by a rotating roll bar,
(2) A main channel through which the processed material is transferred, a sub-channel that bypasses the processed material along with the main channel, and a moisture meter that is provided in the sub-channel and measures the moisture content of the processed material. Having a moisture measuring mechanism;
(3) It is characterized by comprising a moisture adjustment controller for controlling the frequency of the net, the temperature adjustment means, and the distributor based on the moisture content data of the processed material by the moisture measuring mechanism. .
[0011]
According to the present invention, since a distributor that keeps the layer thickness of the processed product constant is provided in the dryer, uniform drying can be performed.
In addition, the moisture content of the dried product is continuously measured, and the measured data is fed back to control the vibration frequency of the vibratory dryer net, the temperature in the dryer, and the distributor. Therefore, it is possible to keep proper drying at all times.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An example of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component similar to the said conventional vibration type dryer 10, and description is simplified.
The vibratory dryer 60 of the embodiment shown in FIG. 1 is configured by connecting three vibratory dryers, that is, a first vibratory dryer 54, a second vibratory dryer 56, and a third vibratory dryer 58. Has been.
It should be noted that the present invention includes those composed of only one and those composed of two or four or more connected.
[0013]
The first vibration type dryer 54 includes a heat-insulating housing 18, a net 20 provided in the housing 18, a temperature control unit, and a processed product provided at one end of the housing 18 to be dried. The charging port 26 is generally configured by a loading port 26 and a discharge port 28 provided at the other end of the housing 18 for discharging the processed material.
The temperature adjusting means includes a plurality of hot air blowing devices 22 disposed below the net 20 and a plurality of air exhausting devices 24 disposed above the net.
In the present invention, the net 20 is used to place a processed product to be dried, and is a net-like or perforated plate having heat resistance and durability, and the mesh is such that the processed product to be dried cannot pass through. It is supposed to be.
Further, although not shown in the figure, a vibration device is attached to the net 20 and vibrates finely up and down. Due to this vibration, the processed material put on the net 20 is moved from the front end (input port side 26) to the rear end. Move to (discharge port 28 side).
[0014]
The hot air blowing device 22 is substantially constituted by a blowout port 34 and a hot air controller 32 that controls the blowout port 34, and the warm air blown from the blowout port 34 passes through the mesh of the net 20 and is processed on the net. Is heated and dried, and is discharged from the air exhaust device 24.
Similarly, the second vibration type dryer 56 is also schematically configured by arranging the net 20, the hot air blowing device 22 and the air exhaust device 24 in the housing 18 ', and the third vibration type dryer. 58 is also schematically configured by arranging the net 20, the hot air blowing device 22 and the air exhaust device 24 in the housing 18 ''.
Further, the discharge port 28 of the first vibration type dryer 54 and the input port 40 of the second vibration type dryer 56 are connected by a pipe 36, and a cyclone 38 is interposed between the pipe 36 and the input port 40. ing. The discharge port 42 of the second vibration type dryer 56 and the input port 44 of the third vibration type dryer 58 are directly connected.
[0015]
In the vibration type dryer 60 according to the present embodiment, a distributor 68 for keeping the layer thickness of the processed material on the net 20 constant is disposed. As shown in FIG. 1, the distributor 68 is in the vicinity of the rear of the dispersion plate 30 in the first vibratory dryer 54, and in the vicinity of the upper portion of the net 20 in the center of the housing 18 ′ in the second vibratory dryer 56. Is arranged.
The distributor 68 will be described with reference to FIG. The distributor 68 shown in FIG. 2 is roughly configured by a rotating shaft 72, a plurality of roll bars 70 coupled to the rotating shaft 72 by a coupling member 74, and a motor 76 that rotates the rotating shaft 72.
The rotation shaft 72 and the roll bar 70 parallel to the rotation shaft 72 are provided along the width direction of the net 20. Further, when the rotating shaft 72 rotates and the roll bar 70 is at the lowest point, that is, when the roll bar 70 is closest to the net 20 (roll bar 70 ′ in FIG. 2), between the roll bar 70 ′ and the net 20 The distributor 68 is provided on the net 20 so that a certain gap is formed. This gap adjusts the layer thickness of the processed product to be constant.
[0016]
Furthermore, in the vibration type dryer 60 of the present embodiment, a moisture measuring mechanism 80 is provided at the rearmost part thereof.
The moisture measuring mechanism 80 of this embodiment will be described with reference to FIG. The moisture measuring mechanism 80 shown in FIG. 3 includes a main channel 82 through which most of the processed material discharged from the outlet 46 passes, a sub channel 84 provided along with the main channel 82, and a sub channel 84. And a moisture meter 86 provided in the.
The sub-flow path 84 bypasses a predetermined amount of the processed material passing through the main flow path, and the processed material passing through the main flow path 82 is taken into the sub-flow path 84 from the intake port 88 and is returned from the return port 90 to the main flow path. 82 is returned.
[0017]
The processed material that passes through the sub-flow channel 84 stays in a shape near the return port 90, and the passing speed of the processed material is set by vibration of a portion in front of the return port 90. The moisture meter 86 measures the moisture content of the staying processed material. The amount of residence and the passing speed can be adjusted by the vibrator 92 in the sub flow path 84.
Although various types such as those using infrared rays or microwaves can be applied to the moisture meter 86, a moisture meter of a type using microwaves is preferable.
[0018]
Furthermore, although not shown, the moisture meter 86 is connected to a moisture adjustment controller. This moisture adjustment controller is further connected to and controlled by a vibration device that vibrates each net 20, temperature control means, and distributor 68.
That is, the moisture adjustment controller feeds back the moisture content data of the processed material measured by the moisture meter 86 of the moisture measuring mechanism 80, and the frequency of each net 20, the temperature in the housing by the temperature controller, the roll bar of the distributor 68 Control the number of revolutions.
Specifically, if the moisture content of the processed product is greater than a predetermined amount, the drying is not sufficient, and therefore the frequency of the net 20 is reduced or the hot air blowing device is used to slow down the transfer speed of the processed product. Control is performed such as increasing the temperature of the hot air blown out 22 or decreasing the rotational speed of the distributor 68. Further, when the moisture content of the processed product is less than a predetermined amount and the degree of drying is too high, the frequency of the net 20 is increased or the hot air blowing device 22 is used to increase the transfer speed of the processed product. Control is performed such as lowering the temperature of the hot air blown out from the air or increasing the rotational speed of the distributor 68.
[0019]
In the vibration type dryer 60 of the present embodiment, the semi-solid processed material is first charged into the charging port 26 of the first vibration type dryer 54 from the left side of FIG.
Then, the charged processed material is charged into the housing 18 of the first vibration type dryer 54 from the charging port 26. At that time, the processed material falls from the inlet 26 onto the dispersion plate 30, and is dispersed and dropped onto the front end portion of the net 20 along the slope of the dispersion plate 30.
The net 20 vibrates, and the processing object placed on the net 20 is shaken by the vibration and gradually moves backward, and the layer thickness is kept uniform by the rotating roll bar 70 of the distributor 68 while maintaining the uniform thickness. It is discharged out of the housing 18 through the discharge port 28 while being dried by the warm air from the air blowing device 22.
[0020]
The processed product discharged from the first vibration type dryer 54 is introduced into the housing 18 ′ from the inlet 40 of the second vibration type dryer 56 through the cyclone 38. Here again, the processed material introduced from the introduction port 40 falls on the dispersion plate 30 and then falls on the net 20 along the slope. The processing object placed on the vibrating net 20 is gradually transferred to the discharge port 42 while being shaken and dried. During the transfer of the processed material, the distributor 68 makes the layer thickness uniform.
Subsequently, the processed product is transferred to a third vibration type dryer. The processed material is also dried on the net 20 in the third vibration dryer 58 and discharged from the discharge port 46 to the outside of the housing 18 ''.
The processed product discharged from the discharge port 46 is transferred to the main flow path 82 of the moisture measuring mechanism 80. A part of the processed material is taken from the main flow channel 82 into the sub flow channel 84, and the water content is continuously measured.
[0021]
The processed material that has passed through the moisture measuring mechanism 80 is subjected to a subsequent process such as a pulverizing process as necessary, and becomes granular or powdery.
Further, the moisture amount data in the moisture meter 86 is transmitted to the moisture adjustment controller and fed back to the drying setting of the vibration type dryer.
[0022]
In the vibration type dryer 60 according to the present embodiment, the distributor 68 for keeping the thickness of the layer to be processed is arranged, so that the processed object is placed evenly on the net and the moisture is measured. The water content of the processed material is continuously measured by the mechanism, and the measured data is controlled via the moisture controller to control the transfer speed of the processed material, the temperature control means, and the distributor. Can be properly dried. Therefore, it is possible to prevent the processed product from being insufficiently dried or from being dried too much.
[0023]
In this embodiment, the moisture measuring mechanism 80 is disposed at the rear part of the third vibration type dryer 58, but the moisture measuring mechanism is provided at the rear part of the first vibration type dryer 54 and the second vibration type dryer 56 in various places. May be arranged.
[0024]
【The invention's effect】
The vibration type dryer according to the present invention includes a housing in which a processed material to be dried is charged, a net that transfers the processed material from the inlet to the outlet while vibrating, and a temperature control unit that heats the inside of the housing. Distributor which is a mold dryer and makes the layer thickness of the processing object placed on the net constant by a rotating roll bar, the main flow path through which the processing object is transferred, and the processing object accompanying the main flow path Based on the water content data of the processed material by the moisture measuring mechanism having a sub flow path for bypassing the water and a moisture meter provided in the sub flow path for measuring the water content of the processed material. And a moisture control controller for controlling the temperature control means and the distributor, and the drying process is performed while the layer thickness of the processed material is kept constant by the distributor. Check the moisture content of the treated product and dry it. Since it is fine adjustment of machine settings can be performed at all times adequate drying.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a vibration type dryer according to an embodiment of the present invention.
FIG. 2 is a front view of a distributor.
FIG. 3 is a schematic plan view of a moisture content measuring mechanism.
FIG. 4 is a block diagram showing a conventional vibration type dryer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vibration type dryer 12 1st vibration type dryer 14 2nd vibration type dryer 16 3rd vibration type dryer 18 Housing 20 Net 22 Hot air blowing device 24 Exhaust device 26 Input port 28 Outlet port 30 Dispersion plate 38 Cyclone 40 inlet 42 outlet 44 inlet 46 outlet 54 first vibratory dryer 56 second vibratory dryer 58 third vibratory dryer 60 vibratory dryer 68 distributor 70 roll bar 80 moisture measuring mechanism 82 main flow Channel 84 Wide channel 86 Moisture meter 92 Vibrator

Claims (1)

A housing in which an input port into which a processed product to be dried is input is formed in the front portion and an exhaust port in which the processed product is discharged is formed in the rear portion;
A net provided in the housing for transferring the processed material from the input port to the discharge port while vibrating;
A vibration type dryer having a temperature control means for heating the inside of the housing,
A distributor that makes the layer thickness of the processing object placed on the net constant by a rotating roll bar;
Moisture having a main flow path through which the processed material is transferred, a sub flow path for bypassing the processed material along with the main flow path, and a moisture meter provided in the sub flow path for measuring the water content of the processed material A measurement mechanism;
A vibration type dryer having a moisture adjustment controller for controlling the frequency of the net, the temperature adjustment means, and the distributor based on the moisture content data of the processed product by the moisture measuring mechanism.

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