JP2000317914A - Apparatus for dry-treatment for lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for drying treatment for lumber capable of taking a drying time long by prolonging a combustion time. SOLUTION: In an apparatus for drying treatment for lumber 1 equipped with a drying treatment room 3 capable of being hermetically sealed, and a fumigation smoke generation part 4 for supplying fumigation smoke to the drying treatment room 3, the smoke generation part 4 is equipped with a long combustion route 41 wherein fumigation smoke generation source 7 is housed, and it is continuously extended in zigzag, and equipped with at least two operation openings 8 for communicating an inside of the combustion route 41 to an outside, or interrupting them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood drying apparatus for drying wood such as raw wood.

[0002]

2. Description of the Related Art Conventionally, methods for drying wood include natural drying and forced drying in which artificial wood is heated and dried using gas, electricity, steam, or the like.

However, in natural drying, it takes a very long time to dry, and productivity is extremely reduced.
Generally, forced drying is performed.

[0004] In the forced drying, the timber to be subjected to the drying treatment is put into a drying treatment chamber, and the room temperature is, for example, about 120 to 200 ° C in the case of high temperature drying.
Drying is performed at 140 ° C., about 80 ° C. for medium-temperature drying, and about 40 to 50 ° C. for low-temperature drying. This temperature is appropriately selected depending on the type of wood to be dried.

[0005] Of the forced drying, a method disclosed in
As shown in JP-A-156808, wood waste materials, such as cannabis scraps, sawdust, wood chips, wood chips, etc., are burned to generate smoke. The smoke generated at this time smokes the wood and is generated during combustion. Drying with smoke is also practiced.

[0006] This smoke drying can easily dry wood by smoking and has an insect repellent effect.

[0007]

However, in the case of smoke drying, since waste materials are burned and smoked, if the waste materials are stacked in a deep incineration path and burned, the waste materials are burned at once, so the burning time is reduced. It became too short to burn for a long time.

Further, if the amount of waste material is increased in order to lengthen the combustion time, the amount of waste material loaded is too large and oxygen for burning cannot be supplied to the lower waste material, so that the combustion time cannot be lengthened after all. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a wood drying apparatus capable of extending the burning time and extending the drying time.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a drying processing chamber which can be hermetically sealed and a smoke generating section for supplying smoke to the drying processing chamber. In the wood drying treatment apparatus provided, the smoke generating section includes a long combustion path in which the smoke generating source is housed and extends continuously in a meandering shape, and at least communicates or blocks the inside of the incineration path and the outside. It was configured to have two operation ports.

According to a second aspect of the present invention, in the first aspect of the invention, the smoke generating section is formed below the drying chamber, and the incineration path of the smoke generating section is opened at the top. A long groove extending continuously in a meandering shape for accommodating a smoke generation source, and a heat radiating plate for covering an upper opening of the groove and radiating heat generated in the groove. The plate was exposed to the drying chamber, and the radiator plate was provided with a discharge section for discharging smoke generated in the groove.

According to a third aspect of the present invention, in the second aspect of the present invention, an operation port for communicating or blocking the inside and the outside of the incineration path is provided near the end of the path on both sides of the long incineration path. In addition, at least one operation port is provided between the two operation ports in the incineration path.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view in cross section showing the entirety of a wood drying treatment apparatus.

The wood drying treatment apparatus 1 includes a sealable drying treatment chamber 3 for accommodating wood 2, a smoke generating section 4 provided at a lower portion of the floor in the drying treatment chamber 3, and a drying treatment chamber 3. A humidifier 5 for supplying a water mist therein and a stirrer 6 for circulating the drying atmosphere in the drying processing chamber 3 for uniformity are provided.

The drying chamber 3 is provided with an entrance 31 for taking in and out of the wood to be dried.
It opens and closes with a shutter.

As shown in FIG. 1, a plurality of humidifiers 5 for supplying water mist are mounted on the ceiling in the drying chamber 3, and the humidifiers 5 spray high-pressure water at the same time as spraying high-pressure water. A high-pressure gas is blown onto the high-pressure water to spray a water mist. The stirring device 6
It is composed of a plurality of fans attached to the ceiling in the drying processing chamber 3, and a bellows pipe is attached to the blowing side of this fan so that the blowing direction can be adjusted.

As shown in FIGS. 1 to 4, the smoke generating section 4 is formed below the drying chamber 3 and stores waste materials 7 such as wood chips as a smoke generating source. A long combustion path 41 extending continuously is provided.

The smoke generating portion 4 has an open upper portion, and a long groove 42 continuously extending in a meandering shape for storing waste material.
And a radiating plate 43 made of a steel plate that covers an upper opening 42a of the concave groove 42 and radiates heat generated in the concave groove 42.
The heat radiating plate 43 is exposed in the drying processing chamber 3, and the heat radiating plate 43 is formed with a plurality of holes 43 a serving as a discharge portion for discharging smoke generated in the concave groove 42.

The heat radiating plate 43 has a relatively large thickness of 19 mm, and this thickness makes good use of the good thermal conductivity of the metal plate. Can radiate heat. The radiator plate 43 forms the floor surface of the drying chamber 3, and the groove 42 forms the meandering combustion path 41.

Further, as shown in FIG. 4, the meandering combustion path 41 is formed by dividing the floor surface of the drying processing chamber 3 into two parts so as to extend in the longitudinal direction and by providing two systems. When one combustion path 41 is described, a plurality of walls 42b are alternately arranged in a zigzag shape such that a path is formed on one side, whereby a maze-shaped meandering concave groove 42 is continuously formed, The combustion path 41 is constituted by the concave groove 42. These two combustion paths 41, 41
Is formed over the entire floor surface.

The inside of the concave groove 42 is covered with a steel plate.

The operation for adjusting the air amount, igniting and inspecting the both ends of the path of the combustion path 41 and a part of the bent part in the concave groove 42 formed by digging in the meandering shape is performed. A plurality of openings 8 are formed.

As shown in FIGS. 2, 4 and 6, the operation port 8 has a wall portion opposite to the wall portion 42c of the concave groove 42 on the side of the drying processing chamber 3 where the entrance 31 is provided. 42c
In addition, a first operation port 81 is provided for each of the combustion paths 41, 41, which opens at a position on the side of one end of the combustion path 41 of the groove 42.

As shown in FIG. 2, FIG. 3, FIG. 4, and FIG.
42d, a second operation port 82, a third operation port 83, a fourth operation port 84, a fifth operation port 85, and a sixth operation port that open at the other end of the path of the combustion path 41 and the position of the bent portion of the path. 8
6, a seventh operation port 87 and an eighth operation port 88 are formed.

Each of the operation ports 81 to 88 can be opened and closed by a damper 9, and the opening and closing of the damper 9 is controlled by a computer.

The first operation port 81 is normally used for ignition, and the eighth operation port 88 is normally used for exhaust. The eighth operation port 81 is always open during combustion. It is controlled to be in a state.

The first operation port 81 to the seventh operation port 87 are sequentially opened and closed in the burning direction based on the speed at which the waste material 7 in the concave groove 42 burns along the combustion path 41. It is controlled by a computer as it goes.

That is, at the time when the fire of the waste material 7 burning in the concave groove 42 passes, the damper 9 of the corresponding operation port is opened and oxygen (air) is supplied. After the burn-out, the damper 9 is controlled so as to be closed in order to secure the degree of sealing.

In the combustion path 41, the combustion start position may be set from the opening position of the first operation port 81, or the eighth operation port 88 may be set to the combustion start position. Furthermore, it is possible to set the combustion length of the actually used combustion path 41 in accordance with the required combustion time, and appropriately select the operation port that is the combustion start position.

Further, between the concave groove 42 and the heat radiating plate 43,
As shown in FIG. 6 and FIG. 7, a buffer plate 44 made of a steel plate having an inverted hat-shaped cross section for forming a buffer space 45 is interposed. The buffer plate 44 is formed by forming the concave portion 44a
2 and the flanges 44b, 44b on both sides are
It is disposed so as to be supported on the upper surface of the second wall 42b. Since a plurality of buffer plates 44 are used, holes for allowing smoke to pass through are not formed. However, smoke is supplied to the buffer space 45 from a gap formed between the buffer plates 44. After the inflow, the smoke is sent into the drying processing chamber 3 through the discharge portion 43a of the radiator plate 43 and the gap between the radiator plates 43.

By arranging the buffer plate 44, the flame generated in the concave groove 42 does not directly hit the heat radiating plate 43, and the buffer space 45 is formed. Can be prevented from rising rapidly, and heat spreads in the buffer space 45, so that heat can be radiated from the entire radiator plate 43.

Further, in the wood drying treatment apparatus 1 of the present invention,
Although not shown, high-humidity and high-humidity air containing smoke and mist dispersed in the drying chamber 3 is taken out of the drying chamber 3 and cooled by radiation fins or cooling air to reduce humidity and humidity. After lowering the temperature, the drying chamber 3
The humidity and the temperature in the drying processing chamber 3 are adjusted so that the drying process is performed.

During this cooling, smoke and mist, moisture extracted from the dried wood, and the like are condensed and collected as wood vinegar.

Next, a procedure for using the wood drying apparatus 1 formed as described above will be described.

First, as shown in FIG. 1, waste materials (fuel) as fuel are provided in two concave grooves 42, 42 constituting two-system combustion paths 41, 41 formed in a meandering shape below the drying processing chamber 3. A predetermined amount of the cut ends of the timber, planer waste, planer waste, sawdust) 7 is filled from the upper opening 42a.

At this time, as the waste material 7, it is desirable to use the same type of waste material as the type of wood to be dried. The burning time of the waste material 7 in the incineration passage 41 is adjusted not only by the length of the combustion passage 41 and the amount of the waste material 7 but also by adjusting the type of the waste material 7.

The length of the combustion path 41 can be adjusted depending on whether the waste material is stored in the length direction of the concave groove 42 or not, and the first operation port 81 to the eighth operation port 88 can be adjusted.
By storing the waste material over the entire length of the entire combustion path 41, the longest combustion path 41 can be formed.

Further, when there are many types of waste materials 7, for example, when there are many cut ends of square materials, there are many spaces (air layers) in the surroundings, the combustion temperature is high, the flame is raised, and it becomes easy to burn. Conversely, if there are a lot of planar waste and sawdust, the space (air layer) is reduced, and smoke is caused for a long time. Accordingly, by alternately and appropriately laminating the cut end layers of the square lumber and the sawdust layers, it is possible to adjust the burning time and the degree of smoke generation.

When the waste material 7 is filled in the incineration passage 41, a buffer plate 44 made of a steel plate and a radiator plate 43 made of a steel plate are laid in the upper opening 42a of the incineration passage 41, and the floor surface is formed by the radiator plate 43. It is formed.

Next, when the floor surface is formed, the wood 2 to be dried is carried in from the entrance 31 and is piled up with a predetermined gap opened, and then the entrance 31 is closed and the drying chamber is closed. 3 is sealed.

Then, for example, the waste material 7 in the concave groove 42 is ignited from the first operation port 81, and the waste material 7 starts burning, and is disposed below the heat radiating plate 43 closing the opening 42a of the concave groove 42. As the buffer plate 44 is heated, the smoke generated in the groove 42 flows into the buffer space 45 formed by the buffer plate 44 and the heat radiating plate 43.

The radiant heat generated from the heated buffer plate 44 and the heat convection in the buffer space 45 heat the heat radiating plate 43 made of steel plate almost uniformly, and smoke is also provided in the hole provided in the heat radiating plate 43. It flows out into the drying processing chamber 3 from 43a.

Simultaneously with the generation of smoke from the smoke generating section 4, a humidifying mist is sprayed from the humidifying device 5.

In this way, the temperature of the drying atmosphere in the drying processing chamber 3 is maintained at about 80 ° C. and the humidity is maintained at about 80% by the smoke from the smoke generator 4 and the mist for humidification from the humidifier 5. .

In the meantime, in the case of the apparatus of the present invention, since the combustion path 41 is formed in a meandering shape, smoke was generated and drying was performed for about 200 hours (see FIG. 8).

As described above, when drying is performed by the smoke from the smoke generating section 4 and the mist for humidification from the humidifier 5, the inside of the drying chamber 3 is maintained at an appropriate humidity by the mist for humidification. Therefore, compared to a smoke drying device equipped only with a smoke generating section, the temperature and humidity can be controlled, and the temperature can be quickly increased to a high temperature and high humidity in the early stage of drying, and it can be maintained. Among the components, it is possible to perform an operation of heat-softening the lignin hemicellulose and then releasing the water in the wood to the outside of the material.

In addition, since such an operation can be performed in the early stage of drying, the vapor pressure inside the wood can be increased, and the connection passage (pit) between the cells is usually closed by tols, but it is peeled off. Since it is destroyed, the subsequent movement of moisture is facilitated, so that cracks, irregularities, warpage, and the like can be prevented, and the drying time can be greatly reduced.

Further, in the smoke drying apparatus having only the smoke generating section, the unevenness of the moisture content of the dried wood caused by the uneven drying in the drying apparatus cannot be adjusted in the latter stage of the drying. In the case of drying with the smoke from the smoke generating section 4 and the mist for humidification from the humidifier 5, the temperature and humidity can be artificially operated from the outside. By setting the drying conditions lower by about%, so-called equalizing operation and subsequent so-called conditioning operation to remove the drying stress generated inside the wood can be performed. As a result, a large cross section beam plate, log, etc. Difficult drying can be performed in large quantities at a time.

In the above embodiment, the waste material is of the same type as the wood to be dried. However, the present invention is not limited to such a case.

In the present embodiment, the smoke generating section is formed below the drying chamber, but the smoke generating section of the present invention may be formed on the side of the drying chamber, or may be formed on the upper side. You may make it.

In the case where the smoke generating section is formed on the side of the drying chamber, the meandering combustion path may be constituted by stacking a plurality of units of one combustion path on the upper and lower sides, thereby forming a vertical space. It can be used effectively and a long smoke burning time can be secured even in a small installation area.

At this time, if a discharge port for discharging the smoke generated in the smoke generating section to the drying processing chamber is provided, the room constituting the smoke generating section and the outside can be connected. It suffices that at least two operation ports for communication or cutoff are provided for ignition and exhaust.

Further, as shown in FIG. 4, the meandering combustion path may be divided into two parts so that the floor surface of the drying chamber 3 extends in the longitudinal direction, and may be formed in two systems. , And two systems may be formed.

[0055]

According to the present invention, in a wood drying treatment apparatus including a sealable drying processing chamber and a smoke generating section for supplying smoke to the drying processing chamber, the smoke generating section includes a smoke generating section. The source is housed and provided with a long combustion path extending continuously in a meandering manner, and at least two operation ports for communicating or blocking the inside and the outside of the incineration path are provided, so that the area is limited. Also, by forming the combustion path by meandering, a combustion path of a desired length can be formed. As a result, by sequentially burning along the meandering combustion path, the smoking time can be extended, and the combustion path is formed so as to extend continuously in a meandering manner. The smoking time can also be freely set by setting the burning length of the smoking source to be stored to a desired length.

Further, a smoke generating section is formed below the drying treatment chamber, and an incineration path of the smoke generating section is opened at an upper portion.
A long groove extending continuously in a meandering shape for accommodating a smoke generating source; and a heat radiating plate covering an upper open portion of the concave groove and radiating heat generated in the concave groove. Is exposed to the drying processing chamber, and the heat radiation plate is provided with a discharge section for releasing smoke generated in the groove. Can be effectively used for heating the inside of the drying chamber via the heat sink. In addition, since the radiator plate is formed at the bottom of the drying chamber, heat efficiently convects upward from the bottom of the drying chamber, and the drying chamber can be heated substantially uniformly and satisfactorily.

Further, near the end of the path on both sides of the long incineration path, an operation port for communicating or blocking the inside and the outside of the incineration path is provided, and at least one operation port is provided between these two operation ports on the path of the incineration path. If one operation port is provided, ignition and air adjustment can be performed from any operation port, so even if the actual incineration length in the incineration path is freely set, air adjustment can be performed according to the combustion condition, Combustion can be performed efficiently along the combustion path. Furthermore, not only the entire length of the combustion path but also a portion of the combustion path can be used for combustion,
Ignition and air adjustment can be performed in accordance with the incineration position, and combustion can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view schematically showing a wood drying apparatus according to the present invention.

FIG. 2 is a longitudinal sectional side view schematically showing a wood drying treatment apparatus according to the present invention.

FIG. 3 is a vertical sectional side view schematically showing the wood drying apparatus according to the present invention, as viewed from the other side.

FIG. 4 is a plan cross-sectional view of a groove forming a combustion path in a smoke generating section of the wood drying apparatus according to the present invention.

FIG. 5 is a plan view of a smoke generating section of the wood drying apparatus according to the present invention.

FIG. 6 is a longitudinal sectional view of a groove forming a combustion path in a smoke generating section of the wood drying apparatus according to the present invention.

FIG. 7 is a partially cutaway longitudinal sectional view of a groove forming a combustion path in a smoke generating section of the wood drying treatment apparatus according to the present invention.

FIG. 8 is a graph showing a temperature change in the wood drying treatment apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wood drying processing apparatus 2 Wood 3 Drying processing chamber 4 Smoke generation part 41 Combustion path 42 Depression groove 43 Heat sink 43a Hole (discharge part) 7 Waste material (smoke generation source) 8 (81-88) Operation port

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ikuo Iida 34-10 Kihatauchihata, Uji-city, Kyoto Uni-Uji Mansion 4 Building 2011 F-term (reference) 2B230 AA15 AA16 BA01 BA02 BA17 EA19 EA21 EB05 EB12 EB13 EB15 EB21 EC16 EC24 3L113 AA01 AB02 AB06 AC03 AC27 AC44 AC47 AC58 AC67 AC73 AC76 BA05 DA01 DA10 DA11 DA24

Claims (3)

[Claims] 1. A wood drying apparatus comprising a hermetically sealable drying chamber and a smoke generating section for supplying smoke to the drying chamber, wherein the smoke generating section accommodates a smoke generating source, A wood drying treatment apparatus comprising: a long combustion path extending continuously in a meandering manner; and at least two operation ports for communicating or blocking the inside and the outside of the incineration path. 2. A smoke generating section is formed below the drying treatment chamber, and an incineration path of the smoke generating section has an open upper portion and is continuous in a long and meandering shape for storing a smoke generating source. A concave groove extending
A heat radiating plate that covers an upper open portion of the concave groove and radiates heat generated in the concave groove, and exposes the heat radiating plate to the drying processing chamber and causes the heat radiating plate to emit smoke generated in the concave groove. The wood drying treatment apparatus according to claim 1, further comprising a discharge unit for discharging the wood. 3. An operation port for communicating or blocking communication between the inside and the outside of the incineration path is provided near the end of the path on both sides of the long incineration path, and at least one between the two operation ports in the path of the incineration path. The wood drying treatment apparatus according to claim 2, wherein two operation ports are provided.