JPH09327804A - Fumigation drying device of wood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a low cost and simple drying of wood by a method wherein a combustion chamber is arranged at the back of the side wall of a drying chamber under the condition that both the chambers are communicated with each other through smoke intake ports and smoke intake and exhaust ports formed at the upper and the lower parts of the side wall of the drying chamber and, in addition, a funnel, the lid of which is mounted to the upper opening of the drying chamber and the basic end of which is mounted to the bottom part of the drying chamber, is provided. SOLUTION: Within a peripheral wall A1, a drying chamber 2 and a combustion chamber 1 is arranged through a concrete side wall A2. As for the drying chamber 2, a cylindrical funnel 6, at the upper part of which an opening is provided and to the basic end of which the bottom part of the drying chamber is connected, is arranged vertically upwards. The combustion chamber 1 has an opening at its upper part. Further, cylindrical smoke intake ports 3 are jointly provided at the upper middle of the side wall A2, while cylindrical smoke intake and exhaust ports 4 are provided at the lower right side and the lower left side of the side wall A2 so as to communicatingly connect the drying chamber 2 which the combustion chamber 1 by means of the smoke intake ports 3 and the smoke intake and exhaust ports 4 and lids are coveringly provided on the upper openings of both the chambers 1 and 2. Accordingly, by uniformizing the temperature in the drying chamber 2 through the partial re-heating of smoke, a drying device with no limit of the arranging method, thickness, length or the like can be easily produced at a low cost.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for drying wood smoke.

[0002]

2. Description of the Related Art Conventionally, as a drying apparatus for wood, a large-scale drying apparatus utilizing a steam drying method, a low temperature dehumidifying method, and a high frequency drying method has been known.

[0003]

However, in the above-mentioned conventional wood drying apparatus, a large amount of initial investment is required, and in addition, a large amount of energy is consumed in fuel, which is a running cost. was there.

Therefore, it is possible to dry the wood to remove the moisture inside the wood, to remove the internal stress of the wood, and to make the core material have a good aesthetic appearance.
In addition, it has been desired to develop a wood drying device that is easy to manufacture.

[0005]

In order to solve the above-mentioned problems, the present invention provides a combustion chamber behind a side wall of a drying chamber having an opening at the top, and the drying chamber and the combustion chamber are provided on the side wall of the drying chamber. A smoke intake hole formed in the upper part and a smoke intake and exhaust hole formed in the lower part of the side wall are connected for communication, and a lid is provided to cover the upper opening of the drying chamber, and a chimney with a base end is attached to the bottom of the drying chamber. It is intended to provide a smoke drying apparatus for wood that is installed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A wood smoke drying apparatus according to the present invention is formed into a rectangular box shape having a longitudinal shape in the left-right width direction, and a peripheral wall formed of a stone wall hardened with clay is formed around the peripheral wall. The left side of the interior has an opening at the top and a rectangular box-shaped drying chamber elongated in the left-right width direction, and the right side of the peripheral wall has an opening at the top and the front-rear depth direction. In this, a long rectangular box-shaped combustion chamber is formed.

Then, a concrete side wall is formed between the drying chamber and the combustion chamber, three cylindrical smoke intake holes are arranged in parallel at the center of the upper part, and two cylindrical smoke intake holes are formed on the left and right sides of the lower part. A smoke intake / exhaust hole is provided, and the drying chamber and the combustion chamber are connected in communication by the smoke intake / exhaust hole and the smoke intake / exhaust hole.

Further, a concrete flat plate-like lid is detachably covered at the upper openings of the drying chamber and the combustion chamber, and the base end is connected to the left side of the drying chamber and the bottom of the drying chamber. A cylindrical chimney is arranged vertically upward.

In order to dry the wood by using the smoke drier having the above-mentioned structure, the lid is removed and the wood is placed in the dry chamber through the upper opening of the dry chamber in the state of the log. At the same time, wood as a fuel is placed inside the combustion chamber, a lid is placed over the upper openings of the drying chamber and the combustion chamber, the fuel inside the combustion chamber is burned, and the heated smoke generated in the combustion chamber is generated. It is possible to heat and dry the wood that has flowed into the inside of the drying chamber through the smoke intake holes and the smoke intake and exhaust holes formed in the side wall and is placed inside the combustion chamber.

When the temperature of the smoke flowing into the drying chamber decreases, the smoke flows to the bottom of the drying chamber and is discharged to the outside from the stack, but not all the smoke is discharged from the stack.
Part of the smoke flows into the inside of the combustion chamber through the smoke intake and exhaust holes formed in the lower part of the side wall, is heated again inside the combustion chamber, and flows into the inside of the drying chamber through the smoke intake hole and the smoke intake and exhaust holes.

That is, since the smoke intake / exhaust holes are formed in the lower portion of the side wall, the smoke circulates inside the smoke drier,
The temperature inside the drying chamber can be made uniform.

Therefore, when placing the wood in the drying chamber, there is no restriction on the arrangement of the wood, the thickness and the length of the wood, and the wood of various shapes can be freely placed.

About 3 days after the start of drying, white smoke containing a large amount of water vapor is discharged from the chimney, and the color of the smoke changes from white to a yellowish color on the 4th day. From that time, the amount of fuel supplied to the interior of the combustion chamber was reduced, and from the 8th day, refueling was completely stopped, and then about 2
Let stand in the smoke dryer until the temperature reaches room temperature.

As described above, by drying the wood with the smoke drier, the water passage in the conduit, which is the water passage inside the wood, becomes good, and the movement of water inside the wood is promoted. By evaporating the water inside, the water content of the wood can be made about 50%.

Further, after drying with a smoke drier, the wood is lumbered and naturally dried for about one month, whereby the water content of the wood can be reduced to about 15% or less, and at that time, cracks in the wood mouth may occur. It does not occur, and the yield at the time of processing can be improved.

Further, the compressive material (athletic material) generated in the special portion of the wood is also reduced, and the internal stress of the wood is balanced, so that the warpage and bending that occur during the processing of the wood can be reduced.

Moreover, the pigment in the heartwood portion of the wood is discolored and decolorized, changing from dark brown to bright red, and the aesthetic appearance can be improved.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the smoke-drying apparatus A according to the present invention is formed in a rectangular box shape having an elongated shape in the left-right width direction, and the smoke-drying apparatus A is surrounded by the smoke-drying apparatus A. A peripheral wall A1 made of a stone wall hardened with clay is formed, a drying chamber 2 is arranged on the left side inside the peripheral wall A1 and a combustion chamber 1 is arranged on the right side, and concrete is provided between the drying chamber 2 and the combustion chamber 1. To form a side wall A2.

The drying chamber 2 has an opening at the top and is formed in a rectangular box shape elongated in the left-right width direction. In the present embodiment, the left-right width is 10 m, the front-back depth is 3 m, and the height is high. 1.5m
And

On the left side of the drying chamber 2, a cylindrical chimney 6 having a base end connected to the bottom of the drying chamber 2 is arranged vertically upward.

The combustion chamber 1 is formed in a rectangular box shape having an opening at the top and a long shape in the front-rear depth direction. In this embodiment, the left-right width is 2 m, the front-rear depth is 3 m, and the height is 3 m. The height is 2m and the bottom is lower than the drying room 2.

On the right side of the combustion chamber 1, the peripheral wall A1 of the smoke drier A is partially cut out to form a rectangular opening 5, and an opening / closing door 8 is attached to the opening 5 and the door 8 is attached. Is provided with an air adjustment window (not shown) that is vertically movable.

Side wall formed between the drying chamber 2 and the combustion chamber 1
As shown in FIG. 3 and FIG. 4, in A2, three cylindrical smoke intake holes 3 are provided side by side at the center of the upper part, and two cylindrical smoke intake and exhaust holes 4 are provided on the lower left and right sides. The smoke intake hole 3 and the smoke intake / exhaust hole 4 connect the drying chamber 2 and the combustion chamber 1 in communication with each other.

As shown in FIG. 4, in the smoke intake hole 3, a flat shield plate 9 is provided at the central position in the left-right longitudinal direction so as to protrude vertically downward from the upper portion of the inner peripheral surface, and the drying chamber 2 side. A brick 10 is placed at the end of the, and a brick 11 is placed at the end of the smoke intake / exhaust hole 4 on the combustion chamber 1 side.

Further, a concrete flat plate-like lid 7 is detachably covered at the upper openings of the drying chamber 2 and the combustion chamber 1.

The smoke drier A is constructed as described above, and a method of drying wood using the smoke drier A will be described below.

First, the lid 7 is removed, and wood is placed in the drying chamber 2 through the upper opening of the drying chamber 2 in the state of logs as they are.

Further, wood as a fuel is placed inside the combustion chamber 1. Wood used as fuel may be lumber waste, sawdust, woodland residue, or the like.

Then, the lid 7 is provided to cover the upper openings of the drying chamber 2 and the combustion chamber 1 to burn the fuel in the combustion chamber 1.

At this time, the amount of air flowing into the interior of the combustion chamber 1 is reduced by adjusting the air adjusting window provided in the combustion port 5 so that the temperature in the smoke drier A does not rise rapidly. I try not to burn the fuel completely. By doing so, fuel consumption can be suppressed and the fuel can be used for a long time.

The heated smoke generated by burning the fuel in the combustion chamber 1 flows into the drying chamber 2 through the smoke intake hole 3 and the smoke intake / exhaust hole 4 formed in the side wall A2, and the combustion chamber 1
The wood placed inside is heated and dried.

The smoke that has flowed into the drying chamber 2 flows to the bottom of the drying chamber 2 when the temperature drops and is discharged from the chimney 6 to the outside.

At this time, not all the smoke is discharged from the chimney 6, but a part of the smoke flows into the inside of the combustion chamber 1 through the smoke intake / exhaust hole 4 formed in the lower portion of the side wall A2, and the inside of the combustion chamber 1 is heated again. Then, it passes through the smoke intake hole 3 and the smoke intake / exhaust hole 4 and flows into the drying chamber 2.

That is, since the smoke intake / exhaust hole 4 is formed in the lower portion of the side wall A2, the smoke circulates inside the smoke drying device A, and the temperature inside the drying chamber 2 can be made uniform.

Therefore, when placing the wood in the drying chamber 2, there is no restriction on the arrangement of the wood, the thickness or the length of the wood, and the wood of various shapes can be freely placed.

When the smoke flows into the drying chamber 2 through the smoke intake holes 3, the shielding plate 9 formed inside the smoke intake holes 3
Further, the brick 10 placed at the end on the drying chamber 2 side allows the heated smoke to flow upward from the smoke intake hole 3.

Therefore, the smoke can be prevented from directly hitting the wood placed inside the drying chamber 2, and the whole wood placed inside the drying chamber 2 can be uniformly heated and dried.

When the smoke flows into the drying chamber 2 through the smoke intake / exhaust hole 4, the brick 11 placed at the end of the smoke intake / exhaust hole 4 on the combustion chamber 1 side causes a flame in the combustion chamber 1 to be generated. Drying room 2
I try not to get inside directly.

Therefore, the flame inside the combustion chamber 1 is changed to the drying chamber 2
It is possible to prevent the wood inside from being burnt and prevent a fire from occurring.

As described above, the wood placed inside the drying chamber 2 is heated and dried for about 10 days, and the temperature inside the drying chamber 2 is changed as described below.

That is, the temperature inside the drying chamber 2 is gradually raised for about 3 days after the start of drying. At this time, white smoke containing a large amount of water vapor is discharged from the chimney 6, but the smoke color changes from white to a yellowish color on the fourth day. At that time, the temperature inside the drying chamber 2 was set to about 160 ° C, the amount of fuel supplied to the inside of the combustion chamber 1 was reduced from that time, and the refueling was completely stopped from the 8th day. Then, it is left for about 2 days until the temperature inside the drying chamber 2 becomes normal temperature.

As described above, by drying the wood by the smoke drier A, the lignin and the hemicellulose adhering to the inside of the conduit, which is the passage of water inside the wood, is softened and the water in the conduit is passed through. The moisture content of the wood can be increased to about 50% by promoting the movement of water inside the wood and evaporating the water inside the wood.

Then, after drying with the smoke drier A, the wood is lumbered and naturally dried for about 1 month, whereby the water content of the wood can be reduced to about 15% or less. And the yield at the time of processing can be improved.

Further, by softening the lignin and the like, the amount of compressive material (athletic material) generated in the special portion of the wood is reduced, and the internal stress of the wood is balanced, so that the warpage and bending that occur during the processing of the wood are reduced. Can be reduced.

Moreover, by drying the wood by the smoke drier A, the pigment in the heartwood portion of the wood is discolored and decolorized, and the color changes from dark brown to bright red, so that the aesthetic appearance can be improved.

[0047]

The present invention is embodied in the form described above and has the following effects.

That is, according to the present invention, in the smoke drier, since the smoke intake / exhaust hole is formed in the lower portion of the side wall and the chimney having the base end attached to the bottom of the drying chamber is arranged, the smoke inflow is introduced into the drying chamber. All the generated smoke is not discharged from the chimney, but a part of the smoke flows into the inside of the combustion chamber through the smoke intake / exhaust hole formed in the lower part of the side wall, is heated again inside the combustion chamber, and passes through the smoke intake hole and the smoke intake / exhaust hole. By flowing into the inside of the drying chamber, the smoke circulates inside the smoke drying device, and the temperature inside the drying chamber can be made uniform.

Therefore, when placing the wood in the drying chamber, there is no restriction on the arrangement of the wood, the thickness or the length of the wood, and the wood of various shapes can be freely placed.

[Brief description of drawings]

FIG. 1 is a plan view of a wood smoke drying apparatus according to the present invention.

FIG. 2 is a sectional side view of the same.

FIG. 3 is a sectional view taken along the line I-I.

FIG. 4 is a sectional view taken along the line II-II.

[Explanation of symbols]

 A Smoke drier A1 Circumferential wall A2 Side wall 1 Combustion chamber 2 Drying chamber 3 Smoke intake hole 4 Smoke intake and exhaust hole 5 Boiler opening 6 Chimney 7 Lid 8 Door 9 Shield 10 Brick 11 Brick

Claims (1)

[Claims] 1. A combustion chamber is provided behind a side wall of a drying chamber having an opening in the upper part, and a smoke intake hole formed in the upper side wall of the drying chamber and the combustion chamber and a smoke intake and exhaust hole formed in the lower side wall of the drying chamber. A smoke drying apparatus for wood, characterized in that it is connected and communicated by means of the above, a lid is provided on the upper opening of the drying chamber, and a chimney having a base end is attached to the bottom of the drying chamber.