KR101972510B1 - A drying apparatus - Google Patents

Abstract

A drying device is disclosed.
Such a drying apparatus includes a drying unit having a cylindrical drying space in which a material to be dried is placed, a rotation driving unit having a rotating shaft and a pushing rod formed to rotate the material to be dried contained in the drying unit along the circumference of the drying space, A discharge unit configured to selectively drop and discharge the laundry to be dried and rotated by the rotation driving unit through the bottom surface side of the drying band, and a drying unit for drying the laundry to be dried inside the drying space of the drying band, And a heat source supply unit configured to supply the heat source supply unit.

Description

[0001] DRYING APPARATUS [0002]

The present invention relates to a drying apparatus.

Recently, demand for wood pellets (wood pellets) has been rapidly increasing as heating fuel for farmhouses and small-scale factories, due to an increase in consumer burden due to rising prices of heating fuels such as kerosene and gas.

Wood pellets are known to be economical and eco-friendly because they are cheaper in price compared to conventional fossil fuels, have a significantly lower emission of toxic gases during combustion, and can recycle combustible materials such as by fodder .

The wood pellets are produced by compression molding of sawdust or wood chips produced in the course of processing wood, and in order to improve the combustion efficiency for heating, it is preferable to use a sawdust or a wood chip, that is, .

As a method for lowering the water content of the raw material for producing pellets, a method of forced drying using mainly a drying apparatus is widely known. As a drying apparatus used for such a drying operation, there is known a method of manufacturing a wood pellet manufacturing facility of Patent Registration No. 10-1150984 Sawdust Drying Apparatus. "

However, the sawdust drying apparatus of the wood pellet manufacturing facility of the above-mentioned Patent Registration No. 10-1150984 has the following structural disadvantages because the sawdust is dried by the drying atmosphere for forcibly supplying and discharging hot air into the rotary drying unit.

First, the excessive supply of sawdust dust may occur due to the forced supply and discharge of hot air.

Moreover, if dust is generated excessively during the drying operation, even if a dust treatment apparatus such as a cyclone member is provided for dust treatment, frequent maintenance is required, so that satisfactory apparatus efficiency is not expected.

In addition, in the drying atmosphere by the one-directional flow of the hot air, the sawdust is difficult to be smoothly transported and discharged from the inside of the rotary drying unit in the closed form, which may be a factor that greatly reduces the yield of the drying operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art,

It is an object of the present invention to provide a drying apparatus capable of easily drying dry materials such as sawdust and wood chips.

In order to realize the object of the present invention as described above,

A drying table having a cylindrical drying space in which the laundry is placed;

A rotation driving unit having a rotary shaft and a plunger, the rotary shaft being rotatable along the circumference of the drying space;

A discharge unit configured to selectively drop and discharge the object to be dried, which is rotationally moved by the rotation driving unit, through the bottom surface side of the drying base;

A heat source supply unit provided inside the drying space of the drying table to supply a drying gas for drying the drying object;

And a drying device.

According to the present invention as described above, it is possible to easily perform drying treatment by a method of supplying a drying gas while rotationally moving a drying object such as sawdust or a wood chip contained in a drying chamber in a drying zone.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the entire structure of a drying apparatus according to an embodiment of the present invention; FIG.
2 to 10 are views for explaining the detailed structure and operation of a drying apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention will be described by those skilled in the art to which the present invention is applicable.

Therefore, the embodiments of the present invention can be modified into various other forms, so that the claims of the present invention are not limited to the embodiments described below.

FIG. 1 is a view schematically showing the entire structure of a drying apparatus according to an embodiment of the present invention, and FIGS. 2 to 10 are views for explaining the detailed structure and operation. Referring to FIGS. 1 to 10, The drying apparatus according to the embodiment includes a drying table 2, a rotation driving section 4, a discharge section 6, and a heat source supply section 8.

As shown in Fig. 1, the drying table 2 has a cylindrical drying space A for drying, and the drying space A has an open top side.

2, the drying base 2 may be provided in a state in which the opening A1 side of the drying space A faces upward and is provided on the side of the support frame B, And a metal material having excellent corrosion resistance can be selected and used.

A lid (not shown) for opening and closing the opening A1 side of the drying space A may be provided on the side of the drying table 2. The lid is hingedly connected to the upper side of the drying table 2, And may be formed as a structure that is opened or closed around a point.

On the side of the drying table 2, sawdust or wood chips to be dried for the production of wood pellets are supplied and contained as drying objects W.

The rotary drive unit 4 is formed so as to be able to rotate and move the article W contained in the drying table 2 side in a state of conforming to the drying process.

1 to 3, the rotation driving unit 4 includes a rotation axis C disposed inside the drying table 2 and a plunger C1 disposed on the rotation axis C side.

The rotary shaft C is disposed in a standing state in which one end of the shaft is sandwiched at a midpoint around the bottom surface of the drying space A of the drying table 2. The lower side of the shaft is transferred from the driving source C2, (E.g., chains and sprockets, belts and pulleys), and is rotationally driven about an axis.

As shown in Figs. 2 to 3, the plunger C1 has a plurality of spaced apart from one another in such a manner that one end is fixed to the peripheral portion of the rotary shaft C and the other end is directed to the inner wall surface side of the drying space A, One or more stages may be arranged with intervals in the axial direction of the rotary shaft (C).

The plungers C1 are operated in a state of moving along the rotational direction of the rotating shaft C when the rotating shaft C is rotated about the axis in the drying space A inside the drying table 2. [

The bars (C1) may be formed in a bar shape, and may be formed to have a bent structure while extending in the longitudinal direction of the bar. For example, when the rotation axis C is set to rotate clockwise on the basis of Fig. 3, the free end side of the plunger C1 may be provided in a state of being bent toward the front in the rotation direction.

When the plungers C1 move due to the rotation of the rotary shaft C, the laundry W placed on the inner wall surface side of the drying space A of the drying table 2 is pushed inwardly It is possible to suppress the phenomenon that a part of the object to be dried W is stuck to the periphery of the drying space A and is fixed.

4, the rotary drive unit 4 is rotated by the rotation of the rotary shaft C and the rotary drum C1 in a state in which the article W is placed on the drying space A side of the drying stand 2, And is operated so as to move the laundry W in a state of conforming.

That is, the plunger C1 is moved by the rotation of the rotary shaft C, and the position of the plunger C1 can be shifted sequentially by pushing the object W in accordance with the size or entangled state of the objects W such as sawdust or wood chips But also can be operated in a state of agitating so as to match with the drying treatment while traversing between the stacked layers of the objects W to be dried.

The rotation driving unit 4 further includes a guide hole D corresponding to the rotation axis C as shown in FIG. 2. The guide hole D has a cone-type cover shape, And is formed to have a photo guide surface D1.

2, the guide hole D is formed on the side of the rotary shaft C in a state of covering the circumferential side of the rotary shaft C disposed in a standing state on the bottom surface of the drying space A of the drying table 2, Respectively. At this time, the guide surface D1 of the guide hole D is disposed so as to form a circumferential portion inclined toward the outer side while gradually extending from the upper side to the lower side.

This guide hole D is formed in such a manner that the article W contained in the drying space A of the drying table 2 is not piled up at a position adjacent to the circumference of the rotary shaft C, So that it can be guided smoothly to the side of the part (6).

The discharge portion 6 is formed to have a structure capable of discharging the objects W contained in the drying table 2 to the outside.

1 to 3, the discharge portion 6 has a discharge port E formed on the side of the bottom surface of the drying space A of the drying table 2 and a discharge induction axis E1 .

The discharge port E may be formed on the bottom surface side of the drying table 2 and may have a rectangular shape extending in a direction connecting between the peripheral portion of the bottom surface and the edge portion.

The discharge induction axis E1 is provided with guide pins E2 on the circumferential side of the shaft as shown in FIG. 2, and both end sides of the shaft are rotatably fixed in a state corresponding to the discharge port E side.

The induction pins E2 are installed at intervals on the circumference side of the discharge induction axis E1 in a state where one end of the fin is fixed and standing.

A projecting portion E3 is formed on the protruding end side of the induction pins E2 so that the protruding portion E3 generates a hooking contact force to allow the object W to flow into the outlet E side when the discharge induction axis E1 rotates .

The discharge induction axis E1 may be set to be rotationally driven in one direction by receiving power from a driving source such as a motor (not shown).

5, the discharge unit 6 scrapes the laundry W with the guide pins E2 when the discharge induction shaft E1 is rotated in one direction about the axis, W to be discharged.

On the other hand, the heat source supply unit 8 is formed to be able to supply the drying base Q from the outside of the drying base 2 to the inside of the drying space A.

In particular, the heat source supply unit 8 is formed to have a structure capable of generating a drying base Q by indirect heating.

The heat source supply unit 8 includes a heating pipe F having a heating space F1 formed therein as shown in Figs. 1 and 6, a heater F2 for heating the outer surface of the heating pipe F, a heating pipe F And a blower F3 for supplying air to the heating space F1 side.

The heating pipe F uses a metal pipe having a hollow type heating space F1 formed therein as shown in FIG. 6 and a drying pipe Q is disposed inside the drying space A of the drying table 2, Is placed on the outside of the drying rack (2) in such a manner that the supply of the laundry is possible.

It is preferable to use a metal pipe made of copper (Cu) or aluminum (Al), which is excellent in thermal conductivity and corrosion resistance, among the metals.

The heating pipe F can supply the drying base Q to the drying space A side through the inner surface of the drying space A of the drying table 2 and the mill C1 of the rotation driving unit 4, As shown in Fig.

That is, gas holes G1 are formed on the inner surface (bottom surface and inner wall surface) of the drying space A of the drying table 2 and on the outer surface of the platen C1, 2) and the gas passage G2 formed inside the rotation axis C, as shown in Fig. The gas passages G2 may be set to be connected so as to receive the drying gas Q from the heating space F1 of the heating pipe F. [

The gas holes G1 may be formed to have a hole size within the range of about 2 millimeters to 3 millimeters.

Particularly, it is preferable that the gas holes G1 formed on the side of the plunger C1 are formed on the lower side facing the bottom surface side of the drying table 2 among the peripheral portions as shown in Fig. This structure can suppress the inflow of various fine foreign substances contained in the object to be dried W into the gas holes G1 on the side of the plunger C1.

The heat source supply unit 8 may further include the hole shields H as shown in FIG.

The hole shields H are formed so as to have a shield structure that protects the gas holes G1 and allows the spraying of the drying base Q smoothly.

The hole shield H is disposed in a state of forming a shield space H1 corresponding to the gas holes G1 formed on the bottom surface and the inner wall surface side of the drying space A of the drying table 2, And is hingedly connected.

That is, the hole shields H can be operated in a state in which the shield space H1 can be selectively opened toward either one direction or the opposite direction as shown in Fig. 8 while being rotated around the hinge attachment point H2 .

For example, as shown in Figs. 9 to 10, the hole shield H may be formed in a state in which the rotary drive unit 4 on the inside of the drying table 2 is rotated clockwise or counterclockwise, (H1) may be set to be an open operation.

When the drying process is performed in a state where the drying object 8 contained in the drying space A is moved clockwise or counterclockwise by the rotation driving unit 8, the drying process is performed on the side of the substrate holes G1 The shielding space H1 can be formed and the drying substrate Q can be supplied more smoothly through the shielding space H1.

The heater F2 can be a burner or a heater. For example, when the burner is used, the heater F2 can heat the outer surface of the heating pipe F with the combustion flame as shown in FIG. 6 (Not shown). However, when an electric heater is used, the hot wire may be set to be wound on the outer surface side of the heat pipe F.

The drying base Q is heated so that the drying can be performed in a state in which the water content of the drying object W such as sawdust or wood chips can be lowered to about 20% or less.

The blower F3 is connected to one end of the heating pipe F as shown in FIG. 6 and is set to be capable of forcibly supplying outside air to the inside of the heating pipe F, that is, the heating space F1 side.

When the air is supplied to the heating space F1 side by the operation of the blower F3 while the heating pipe F is heated by the heater F2, the air is supplied to the heating space F1 Is heated to pass through the drying space (A) after being converted into a drying base (Q) through a gas passage (G2) and a gas hole (G1) so as to be dried .

Particularly, the indirect heating and supplying method in which air is heated in a heating atmosphere inside the heating space F1 by the heat conduction of the heating pipe F thus heated and supplied in a state of being converted into the drying base Q is, for example, , It is possible to prevent the supply of the heat source in the state including various kinds of harmful gas generated during the combustion as compared with the direct heating supply method in which the heat (hot air) generated by directly heating the air by the combustion flame of the burner is supplied, .

In the above description, the structure in which one drying rack 2 is arranged in one stage for the drying treatment of the laundry W is shown in the explanation and drawings. However, the present invention is not limited to this structure, And two or more drying rods 2 are stacked in two or more stages in a state of being supported on the support frame B side as shown in Fig.

That is, a lower side of the other drying rack 2 is placed on the upper side of one drying rack 2, and an opening gap I for the water discharge (evaporation) May be set to be in a spaced-apart laminated arrangement.

The rotary drive unit 4, the discharge unit 6 and the heat source supply unit 8 are formed on the side of the stacked drying hobs 2 in the same or similar structure as that of the above example, So that it can be driven.

According to such a laminated arrangement structure, after the article W is first dried at the upper side of the drying table 2, the article W is dropped and supplied to the lower side of the drying table 2 through the discharge portion 6 The drying process of the substrate W can be progressed at least two or more times in a sequential manner by a second drying process, so that the drying (wet process) of the substrate W is smoothly performed, Can be further increased. For example, if the drying processing operation is carried out in a stacked state in which the drying object W is excessively supplied to one drying base 2 side, the moisture discharge (evaporation) on the lower side of the drying floor W of the drying object W is smooth A phenomenon that can not be achieved may occur.

Therefore, the present invention can easily dry the dried object W by a drying method in which the drying object Q is supplied while moving the objects W in the drying space A of the drying stand 2 Lt; / RTI >

Particularly, in the method of supplying the drying base material Q to the inside of the loading layer of the dried object W placed on the side of the drying space A where the upper part is opened, So that the efficiency of the drying treatment can be further improved and the phenomenon of generating dust from the laundry W during the drying operation can be suppressed as much as possible.

2: drying table 4: rotation drive part 6:
8: Heat source supply part W: Dry product Q: Drying gas

Claims (8)

A drying table having a cylindrical drying space in which a drying object is contained, and a gas hole formed on an inner surface side of the drying space;
A rotation driving unit having a rotating shaft and a pushing rod that are rotatably moved along the circumference of the drying space and provided with gas holes on the pushing side;
A discharge unit configured to selectively drop and discharge the object to be dried, which is rotationally moved by the rotation driving unit, through the bottom surface side of the drying base;
A heat source supply unit configured to supply a drying gas for drying the object to be dried to the inside of the drying space through the drying bases and the gas holes on the mast side;
/ RTI >
The heat source supply unit
A heating pipe for heating the air to be converted into a drying gas and a heating pipe connected to the drying side in a state where the drying gas can be supplied to the drying space side through the drying holes and the gas holes on the bottom side, A heater for heating the outer surface of the heating pipe to form a heating atmosphere inside the heating space of the heating pipe by heat conduction, an air blower for supplying air to the heating space side of the heating pipe, And hole shields formed on the inner surface side of the drying space in a state corresponding to the holes,
The hole shields are hinge-connected to the inner surface of the drying space in a state of forming a shield space corresponding to each of the gas holes on the side of the drying stand, and are rotated around the hinge- Is formed so as to be selectively openable in either one direction or opposite direction. The method according to claim 1,
The drying stand comprises:
Wherein a part of the drying space is formed in an opened state, and an opening side of the drying space is disposed in a state of being directed upward. The method according to claim 1,
The rotation drive unit includes:
Wherein the rotary shaft is disposed so as to be rotatable about an axis at a center point of the cylindrical drying space of the drying stand, one end of the push rod is fixed to the circumferential side of the rotary shaft, And the plunger is installed at a plurality of points in a state where the plunger is directed toward the plunger. The method according to claim 1,
The discharge portion
A discharge port formed on the side of the drying space bottom surface of the drying stand, and a discharge inducing shaft arranged so as to correspond to the discharge port side,
Wherein the discharge induction shaft is disposed inside the discharge port in a state in which both ends of the shaft are rotatably fixed with induction pins provided on the circumferential side of the shaft. delete The method according to claim 1,
The heater
A burner or an electric heater is used and set to a state capable of heating the outer surface side of the heating pipe by a combustion flame or a hot wire. delete The method according to claim 1,
The rotation drive unit may further include a guide hole corresponding to the rotation shaft,
Wherein the guide member is formed in a cone type cover and is formed to have an inclined guide surface on a side of the circumference and is disposed so as to cover a circumferential side of the rotation shaft in a drying space of the drying table.

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