JP2005016752A - Powder/grain material drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder/grain material drying device capable of efficiently and uniformly drying whole the powder/grain material such as sawdust. <P>SOLUTION: In a sawdust drying device 1, as an embodiment of this powder/grain material drying device, sawdust is charged from an upper part of a drying tank 2 provided with a ventilation drying part 5 to flow down along a passage for circulation to be discharged at a lower part while it is ventilated and dried. Over a top part of an exhaust drum 28 for the ventilation drying part 5 in the drying tank 2, a movable member 30 is provided. The movable member 30 is also put over a top part of a sawdust feed regulation body 9 of a sawdust feed part 8 at a lower part of the ventilation drying part 5. A drive means is provided for causing reciprocation, sliding, oscillation or vibration of the movable member 30, solely or as combination of these. By fluctuation of the movable members 30, solid of sawdust at and around the top part of the exhaust drum 28, around an air feed drum, and at and around the top part of the sawdust feed regulation body 9 can be loosened to maintain favorable fluidity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a granular material drying apparatus that ventilates air while circulating dried granular materials such as sawdust.
[0002]
[Prior art]
Sawdust generated by processing wood, sawing, etc. can be used in a wide range of sources such as fuel, compost raw materials, and cultivation bases of potatoes, but when sawdust is used as fuel, it is formed into pellets. In that case, it is necessary to dry it to a homogeneous state with the optimum moisture value for molding, and also when using it as a compost raw material or as a cultivation base for potatoes, It is required to be dried in a homogeneous state with the moisture value most suitable for the method.
[0003]
In general, sawdust generated by sawing such as log lumber contains a considerable amount of moisture, and sawdust generated by processing wood or cutting timber also depends on the conditions of collection and storage. In many cases, the collected sawdust must be dried to the required moisture suitable for each method of use.
[0004]
For this reason, various means for drying sawdust have been proposed. If it is roughly classified according to function, it is dried by applying hot air to the stationary layer of sawdust to be dried (see Japanese Patent Laid-Open No. 48-2436), and dried by stirring the sawdust to be dried with a rotating drum. (See Japanese Patent Application Laid-Open No. 60-2868), which is subjected to hot air while swirling the sawdust to be dried by a cyclone (see Japanese Patent Application No. 55-167157: 57-89196 microfilm), There are those which are dried with hot air while stirring with a stirring body in a drying drum (Japanese Utility Model Application No. 2-41864: Japanese Utility Model Application No. 4-1394 microfilm or Japanese Patent Application Laid-Open No. 7-312975).
[0005]
[Problems to be solved by the invention]
Powdery grains such as sawdust, rice bran, oil lees, coffee bean lees, soybean lees, okara, lees, and other cereals form a clumpy form when they contain a lot of water. Even if exposed to water, the drying efficiency is very low, and even if only the surface is dried, the whole cannot be dried uniformly. In addition, even if the particles are agitated with a rotating drum or a stirring body so that the particles can be easily dried, the particles are not slightly loosened and the particles are not loosened. The fact is that we cannot do it.
[0006]
Therefore, the present invention is a method for supplying powder to be dried from the upper part of a drying tank provided with a ventilation drying section therein, and for drying by ventilation while circulating through the ventilation drying section to flow down and discharge from the lower part. In the drying device, a movable member is placed on the top of either the air supply drum and the exhaust drum constituting the ventilation drying unit in the drying tank or any of them, and further the regulation of the powder material feeding unit below the ventilation drying unit A similar movable member is also put on the top of the body, and driving means for singly or in combination thereof such as reciprocating sliding, swinging or vibrating these movable members is provided. By loosening the mass of the dried granular material generated at and near the top of the cylinder and the exhaust duct, as well as the top of the granular material feed-out part, and maintaining its good fluidity, Effect It is an object to provide a granular material drying apparatus well entire can be uniformly dried.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a granular material drying apparatus according to claims 1 to 7. In addition, in this invention, a granular material refers to grains, such as sawdust, rice bran, oil lees, coffee bean lees, soybean lees, okara, lees, and other powdery or granular forms.
[0008]
The granular material drying apparatus according to claim 1 is a granular material drying apparatus that ventilates and dries while circulating the granular material to be dried, and is a drying tank that performs ventilation drying while accommodating and circulating the granular material to be dried. And a granular material lifting machine for supplying and circulating the dried granular material to the drying tank, and the air supply drum and the exhaust drum are opposed to each other inside the drying tank. There is a ventilation drying section that is the flow path of the dry granular material between them, and a movable member is placed on the top of either the air supply drum and the exhaust drum constituting the ventilation drying section or one of them. And driving means for single or combined fluctuations such as reciprocating sliding, swinging or vibrating the movable member, and the top of the air supply and exhaust cylinders and the Loosen the lump of dry powder that occurs in the vicinity and maintain its good fluidity It is configured to be characterized in.
[0009]
The powder drying apparatus according to claim 2 is a powder drying apparatus according to claim 1, in which the powder to be dried in the drying tank flows down quantitatively inside the drying tank below the ventilation drying section. The top part of the granular material supply regulation body of this granular material supply part is covered with the movable member which reciprocates, rocks, or vibrates. Is.
[0010]
The granular material drying apparatus according to claim 3 is the granular material drying apparatus according to claim 2, wherein the movable member of the ventilation drying unit and the movable body of the granular material feeding unit are provided in directions orthogonal to each other. It is characterized by this.
[0011]
The granular material drying apparatus according to claim 4 is the granular material drying apparatus according to claim 2 or 3, wherein the granular material of the top of the air supply drum and the exhaust wind drum or the granular material feeding portion constituting the ventilation drying unit. The top part of the material delivery regulating body is mountain-shaped, and the movable member is also mountain-shaped along these shapes.
[0012]
The granular material drying apparatus according to claim 5 is the granular material drying apparatus according to any one of claims 1 to 4, wherein the movable member has an air supply drum, an exhaust air drum or a granular material feeding regulation on the back side thereof. It is characterized by comprising a roller that is slidably supported at a constant interval on the top of the body.
[0013]
The granular material drying apparatus according to a sixth aspect is the granular material drying apparatus according to any one of the first to fifth aspects, wherein the plurality of movable members are individually driven to reciprocate, swing or vibrate individually. Means are provided.
[0014]
The granular material drying apparatus according to a seventh aspect is the granular material drying apparatus according to any one of the first to sixth aspects, wherein the movable member is formed of a granular material due to fluctuations such as reciprocal sliding, oscillation or vibration. It has a rod-like projection for enhancing the loosening action.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The drawing exemplifies a sawdust drying device as a powder particle drying device according to an embodiment of the present invention. For this reason, in embodiment of invention, a granular material shall call the sawdust which is the example. FIG. 1 is a longitudinal front view of a sawdust drying apparatus, FIG. 2 is a side view showing a partially broken view, FIG. 3 is a perspective view showing a lower structure of a drying tank, and FIG. 4 shows a movable member and its drive structure in a drying section. FIG. 5 is a cross-sectional view of the same. FIG. 6 is a conceptual diagram showing a plurality of fluctuation modes of the movable member.
[0016]
As shown in FIG. 1 thru | or FIG. 3, the sawdust drying apparatus 1 which concerns on this invention is comprised by the drying tank 2 and the granular material lifter 3. As shown in FIG. The drying tank 2 includes a sawdust storage unit 4, a ventilation drying unit 5, and a sawdust retention unit 6 in that order from the top, and a lower end of the sawdust retention unit 6 forms a sawdust delivery unit 8 by a plurality of feeding rolls 7. ing. 9 is the Yamagata pay-out restricting body. 10 is a sawdust collecting unit, and a sawdust discharge screw conveyor 11 is provided at the lower end thereof. Further, an equalizing screw conveyor 12 for evenly dispersing sawdust is provided at the upper part of the sawdust accommodating portion 4, that is, the top surface of the drying tank 2. The transport end of the sawdust discharge screw conveyor 11 in the drying tank 2 and the lower end side of the sawdust lifter 3 are connected by a sawdust transporter 13, and the upper end side of the sawdust lifter 3 and the leveling screw conveyor 12 are It is connected by sawdust conveying rod 14. The sawdust transport rod 13 has a steep slope for smooth flow of sawdust, and the sawdust transport rod 14 is the same. The sawdust feeder 3 is a bucket conveyor, 15 is an upper pulley, 16 is a lower pulley, 17 is a conveyor belt, and 18 is a bucket.
[0017]
The lower part of the drying tank 2 is divided into left and right by a sawdust storage unit 4, a ventilation drying unit 5, a sawdust retention unit 6 and a sawdust collection unit 10, one of which is a hot air chamber 19 and the other is a wind exhaust chamber 20. ing. Note that the hot air chamber 19 is equipped with a hot air generator or is externally attached, and the exhaust air chamber 20 is connected to the outside air through a suction fan or as it is (all of which are shown in the figure). No.), hot air of suction air or pressurized air is blown from the hot air chamber 19 to the ventilation drying unit 5 and is discharged to the air discharge chamber 20.
[0018]
A suction / exhaust fan 21 that sucks and exhausts air from the upper space of the sawdust container 3 is provided on the top surface of the drying tank 2. The sawdust transport basket 13 is provided with an undried sawdust input port 22, and the sawdust transport basket 14 is provided with a dried sawdust discharge port 23. Reference numerals 24 and 25 denote open / close shutters. The sawdust lifter 3 is provided with a moisture measuring means 26 that collects dried sawdust scattered during the lifting and measures its moisture content. The sawdust drying apparatus 1 according to the present invention is configured to finish drying when the moisture measuring means 26 detects that the moisture content of sawdust being circulated and dried reaches a predetermined value. is there.
[0019]
The ventilation drying section 5 of the drying tank 2 is formed by alternately arranging exhaust wind drums 28 similar to the air supply drum 27 having a mountain shape at the top and forming a sawdust downflow passage 29 therebetween. The air supply drum 27 communicates with the hot air chamber 19 and the air exhaust drum 28 communicates with the air discharge chamber 20, respectively. Hot air is exhausted from the hot air chamber 19 across the air supply drum 27 and sawdust flow path 29. The air flows into the body 28 and is discharged into the air discharge chamber 20.
[0020]
A movable member 30 having a shape along the mountain shape is put on the top portion of the mountain shape of the exhaust drum 28 of the ventilation drying unit 5. The movable member 30 includes, on its back side, a top support roller 31 and a side support roller 32 that are slidably supported on the top of the wind exhaust drum 28 at regular intervals. The tip of the movable member 30 is slidably supported by the support portion 33, and 34 is a cover for that portion. The base end of the movable member 30 is connected to an actuator 35, and the movable member 30 is reciprocally slid by the energization drive of the actuator 35. The driving means by the actuator 35 may be provided with a function for single or combined fluctuation such as swinging or vibrating in addition to reciprocating sliding. The loose sawdust lump generated at the top of 28 and the vicinity thereof or the vicinity of the air supply channel 27 is loosened, and the good fluidity is maintained.
[0021]
The movable member 30 may be provided with a plurality of rod-like protrusions 36 for enhancing the sawdust releasing action due to fluctuations such as reciprocal sliding, swinging or vibration. Further, if the plurality of movable members 30 are provided with individual driving means for reciprocating sliding, swinging or vibrating, respectively, and their fluctuation modes are complicated, the sawdust unraveling effect can be further improved. 6A shows a reciprocal sliding manner of the movable member 30, FIG. 6B shows a lateral reciprocating manner, FIG. 6C shows a vertical movement manner, and FIG. 6D shows a twisting manner.
[0022]
In the sawdust drying apparatus 1 according to the present invention, the movable member 30 is also provided at the top of the sawdust feeding regulating body 9 of the sawdust feeding section 8 provided below the ventilation drying section 5. This is equivalent to the movable member 30 provided. In the illustrated embodiment, the movable member 30 of the ventilation drying unit 5 and the movable member 30 on the sawdust feeding unit 8 side are provided in directions orthogonal to each other, so that the ventilation drying unit 5 and the sawdust feeding unit 8 are in the vicinity. The effect of loosening sawdust is great, and its fluidity is even better. Further, by providing the same movable body 30 not only at the exhaust drum 28 of the ventilation drying unit 5 but also at the top of the air supply drum 27, the fluidity of sawdust can be further improved. Note that even if the movable member 30 is not provided in the wind exhaust drum 28 but only in the air supply drum 27, an expected effect can be expected.
[0023]
According to the sawdust drying apparatus 1 according to the present invention, the movable member 30 is placed on the top of one of the air supply drum 27 and the air discharge drum 28 constituting the ventilation drying section 5 in the drying tank 2, and further, A similar movable member 30 is also put on the sawdust feeding regulating body 9 of the sawdust feeding section 8 below the ventilation drying section 5 so that these movable members 30 can be slid, swinged or vibrated in a reciprocal manner or a combination thereof. Because of the drive means, the sawdust generated at the top and the vicinity of the air supply drum 27 and the exhaust drum 28 as well as the top of the sawdust feed regulating body 9 of the sawdust feed-out portion due to the fluctuation of the movable member 30 is generated. Can be loosened and its good fluidity can be maintained. For this reason, even if it is to-be-dried sawdust containing much moisture, the whole can be dried efficiently and uniformly.
[0024]
【The invention's effect】
According to the present invention, the granular material to be dried by ventilation while circulating the exhaust to be dried from the upper part of the drying tank provided with the ventilation drying unit and flowing down the ventilation drying unit and discharged from the lower part. In the drying device, a movable member is placed on the top of either the air supply drum and the exhaust drum constituting the ventilation drying unit in the drying tank or any of them, and further the regulation of the powder material feeding unit below the ventilation drying unit A similar movable member is also put on the top of the body, and driving means for singly or in combination thereof such as reciprocating sliding, swinging or vibrating these movable members is provided. By loosening the mass of the dried granular material generated at and near the top of the cylinder and the exhaust duct, as well as the top of the granular material feed-out part, and maintaining its good fluidity, Efficiency In which the effect capable of uniformly drying the Ku whole can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing a sawdust drying apparatus which is an example of a granular material drying apparatus according to an embodiment of the present invention.
FIG. 2 is a side view in which a part is broken and shown.
FIG. 3 is a perspective view showing a lower structure of the drying tank.
FIG. 4 is a front view showing a movable member and a driving structure thereof in a drying unit.
FIG. 5 is a cross-sectional view of the same.
FIG. 6 is a conceptual diagram showing a plurality of fluctuation modes of the movable member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sawdust drying apparatus 2 Drying tank 3 Sawdust feeding machine 4 Sawdust accommodating part 5 Ventilation drying part 6 Sawdust retention part 7 Feeding roll 8 Sawdust delivery part 9 Sawdust delivery regulation body 10 Sawdust collection part 11 Sawdust discharge screw conveyor 12 Equalization screw conveyor 13, 14 Sawdust transporting rod 15 Upper pulley 16 Lower pulley 17 Conveying belt 18 Bucket 19 Hot air chamber 20 Ventilation chamber 21 Suction exhaust fan 22 Sawdust inlet 23 Sawdust outlets 24, 25 Opening / closing shutter 26 Moisture measuring means 27 Air supply drum 28 Exhaust drum 29 Sawdust flow path 30 Movable members 31, 32 Support roller 33 Support portion 34 Cover 35 Actuator 36 Rod-like projection

Claims (7)

A granular material drying apparatus for drying by ventilation while circulating the granular material to be dried,
It is configured to include a drying tank that stores and circulates the dried granular material and ventilates the dried granular material, and a granular material feeding machine that inputs and circulates the dried granular material to the drying tank,
In the inside of the drying tank, there is provided a ventilation drying section in which the air supply drum and the air discharge drum are opposed to each other and the flow path of the dry granular material is formed between them.
A movable member is placed on the top of either the air supply drum and the exhaust drum constituting the ventilation drying unit or any one of them, and the movable member is slidable, oscillated or vibrated alone or in combination thereof. With drive means for fluctuations,
Powder configured to loosen a mass of dried particulate matter generated at the top and the vicinity of the air supply drum and the exhaust drum due to the variation of the movable member and maintain its good fluidity Grain drying device. Inside the drying tank, there is a powder feed section for quantitatively flowing down the dried powder in the drying tank below the ventilation drying section, and the powder feed of this powder feed section 2. The granular material drying apparatus according to claim 1, wherein the top of the regulating body is covered with a movable member that reciprocates, swings or vibrates. The granular material drying apparatus according to claim 2, wherein the movable member of the ventilation drying unit and the movable member of the granular material feeding unit are provided in directions orthogonal to each other. The top of the air supply drum and the exhaust drum constituting the ventilation drying unit or the top of the powder feed regulating body of the powder feed unit is a mountain shape, and the movable member is also a mountain shape along those shapes. The granular material drying apparatus according to claim 2 or 3, characterized by the above. 5. The movable member according to claim 1, further comprising a roller on the back side thereof, which is slidably supported at a constant interval on the top of the air supply drum, the air discharge drum, or the powder particle feed-out regulating body. The granular material drying apparatus in any one. The granular material drying apparatus according to any one of claims 1 to 5, wherein each of the plurality of movable members is provided with individual drive means for reciprocating sliding, swinging or vibrating. The powder according to any one of claims 1 to 6, wherein the movable member is provided with a rod-like protrusion for enhancing the loosening action of the powder particles due to fluctuations such as reciprocal sliding, swinging or vibration. Grain drying device.

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