JP2540100B2 - Wood drying equipment - Google Patents

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 converting wood, bamboo, etc. into dry wood having a stable water content and dry bamboo in a short period of time.

[0002]

2. Description of the Related Art Wood that has been cut down contains a large amount of water, and insects and their eggs are attached to it. It was usually commercialized as a building material or furniture material. Since the method of naturally drying the wood requires leaving the wood for a long time, it requires a place to be left, the efficiency of fund rotation is poor, and new insect damage occurs.

As a method for drying wood in a short period of time, there are, for example, vacuum drying and a method of sending hot air into a drying chamber.
As in the case of conventional wood drying by natural drying, there are drawbacks such as cracking and distortion due to reabsorption of water. On the other hand, a combustion gas such as wood is introduced into the wood contained in the drying chamber, and the temperature of the combustion gas and the smoke component cooperate to perform drying, insecticide, and egg killing at the same time, omitting chemical treatment. At the same time, a wood drying method in which distortion is less likely to occur has been proposed, and the present inventor has provided a wood drying apparatus for efficiently drying a large amount of wood with high-temperature combustion gas (see Japanese Patent Laid-Open No. 4-148184).

As shown in FIG. 5, the wood drying apparatus of the above publication divides the inside of the casing 1 into a combustion gas generating furnace 3 and a wood storage chamber 4 by a partition wall 2 provided upright inside the casing 1. A combustion gas supply passage 5 that connects the combustion gas generation furnace 3 and the wood storage chamber 4 is formed in the upper portion of the partition wall 2. At the bottom of the combustion gas generation furnace 3, a combustion chamber 6 capable of throwing in and burning waste wood or the like is formed, and a combustion air introduction passage 7 is connected to the combustion chamber 6 and an opening end of the combustion air introduction passage 7 is formed. The part is provided with a damper 8 for controlling the intake air amount.

Gas recovery passages 9 communicating with the combustion air introduction passages 7 are provided at a plurality of locations on the bottom of the wood accommodation chamber 4, and the gas in the wood accommodation chamber 4 is burnt to generate gas in the middle of the gas recovery passage 9. A fan 10 for delivering to the furnace 3 and a damper 11 for regulating the delivery amount are provided. A gas exhaust passage 12 is provided at the bottom of the wood containing chamber 4 on the opposite side of the partition wall 2, the gas exhaust passage 12 is connected to a chimney 13, and a damper 14 is provided in the gas exhaust passage 12. Then, after the wood loaded on the trolley is carried in through the door (not shown) provided in the wood storage chamber 4, the door is closed and the fuel injected into the fuel gas generating furnace 3 is ignited. Flows into the wood supply chamber 4 via the combustion gas supply path 5.

When the damper 14 is closed, the wood supply chamber 4
Wood supply chamber 4 as it is filled with hot combustion gases
The air inside is supplied to the combustion gas generation furnace 3 via the gas recovery passage 9, the temperature inside the wood supply chamber 4 gradually increases, the oxygen concentration decreases, and the combustion speed of the combustion gas generation furnace 3 decreases. The temperature in the wood supply chamber 4 also does not rise. At this time, when the damper 14 is slightly opened to discharge a part of the gas in the wood containing chamber 4 from the gas discharge passage 12, the air is replenished from the combustion air introduction passage 7 and the combustion speed is controlled not to become too slow. .

At this time, the fan 10 and the damper 11 are used to forcibly circulate the gas in the wood containing chamber 4 to the combustion gas generating furnace 3 via the gas recovery passage 9, thereby making the combustion gas generating furnace 3 The air supplied to 3 is diluted with a circulating gas to keep the oxygen concentration low, thereby preventing fluctuations in the oxygen concentration in the wood housing chamber 4 and making the temperature distribution uniform. Thus, the wood is dried in the wood containing chamber 4 filled with the high temperature and low oxygen concentration uniform atmosphere.

[0008]

However, such a wood drying apparatus has the following problems. (1) Since the combustion gas supply path 5 provided above the partition wall 2 has a constant area, the combustion gas generation furnace 3 to the wood storage chamber 4 are
It was not possible to fine-tune the amount of combustion gas to be supplied to. (2) Since the combustion gas generating furnace 3 is filled with a gas having a low oxygen concentration, the damper 8 is opened to make a fresh air from the combustion air introduction passage 7 at the time of starting the combustion or when the temperature rises during the combustion. When a large amount of air is replenished in the combustion gas generation furnace 3, the low oxygen concentration gas explosively burns, the pressure inside the combustion gas generation furnace 3 abruptly rises, and the furnace wall of the combustion gas generation furnace 3 is There is a possibility that backfire may occur in which gas is discharged to the combustion air introduction passage 7 while being damaged. The present invention is intended to solve such problems.

[0009]

In order to achieve the above object, the present invention provides a partition for partitioning a combustion gas generating furnace and a wood containing chamber inside a sealable casing, and the partition is provided above the partition. A combustion gas supply passage communicating from the combustion gas generation furnace to the wood storage chamber is provided, an air introduction passage is provided in the combustion gas generation furnace, a gas discharge passage is provided in the wood storage chamber, and the combustion gas generation furnace is generated. In a wood drying device for heating and drying wood in the wood containing chamber by combustion gas, the partition wall is provided with a gas flow hole that connects the combustion gas generating furnace and the wood containing chamber, and is movable along the partition surface. It is characterized in that an opening adjustment lid is provided which opens and closes the gas flow hole. Further, in the wood drying apparatus, a through hole is provided in at least one of the casing and the partition wall, and the through hole is opened when the pressure in the combustion gas generating furnace reaches a predetermined high pressure. It is also characterized in that a lid is provided.

[0010]

In the wood drying apparatus configured as described above, when the opening adjustment lid is moved, the opening adjustment lid adjusts the opening of the gas flow hole, so that the combustion gas generation furnace supplies the wood to the wood accommodation chamber. The amount of combustion gas generated can be easily adjusted. In addition, if the damper is opened and a large amount of fresh air is replenished to the combustion gas generation furnace from the combustion air introduction passage at the start of combustion or when the temperature rises during combustion, the combustion gas generation furnace is filled with low air. There is a risk that gas with oxygen concentration will burn explosively, but in this case, the safety lid provided on the casing or partition opens to discharge the high temperature gas from the through hole, which damages the furnace wall of the combustion gas generation furnace. There is no problem or problem that backfire occurs in the combustion air introducing passage 7.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is an improvement of the wood drying apparatus described in the prior art (Japanese Patent Laid-Open No. 4-148184). Therefore, only the improved portion will be described. The same parts as those of the above-mentioned wood drying apparatus are designated by the same reference numerals and detailed description thereof will be omitted. Wood drying equipment
As shown in FIG. 1, a combustion gas generation furnace 3 is formed on the right side of a partition wall 2 provided upright in the casing 1, a wood containing chamber 4 is formed on the left side of the partition wall 2, and combustion of the combustion gas generation furnace 3 is performed. The chamber 6 is provided with a combustion air introduction passage 7 with a damper 8, and the wood containing chamber 4 is provided with a gas discharge passage 12 with a damper 14.
As in the conventional example, the gas recovery passage 9 with the fan 10 and the damper 11 is provided.

According to the present invention, a gas distribution hole 15 is provided in the partition wall 2 of the wood drying apparatus, and an opening adjustment lid 16 for opening and closing the gas distribution hole 15 is provided, and the casing 1 and the partition wall 2 are provided.
A safety lid 19 is provided in the through holes 17 and 18 provided in the (see FIG. 1). The number of the gas flow holes 15 may be one or plural, and in this embodiment, the gas flow holes 15 are provided at a plurality of positions in the horizontal direction of the partition wall 2 and in two rows in the vertical direction (see FIG. 3).

A pair of guide rails 20 which are formed in an L shape and whose front ends face each other are provided above and below the gas flow holes 15 in each row, and the pair of guide rails 20 have a rectangular plate shape. The rotation adjusting lid 16 is slidably inserted (see FIGS. 2 and 3). Each gas flow hole 1 is provided in the rotation adjusting lid 16.
5 is provided, and when the rotation adjusting lid 16 is slid along the guide rail 20, the opening degree of each gas flow hole 15 can be freely adjusted from fully open to fully closed. .

A cylindrical protrusion 22 is provided on the right end of the rotation adjusting lid 16.
The columnar protrusion 22 is screwed with a screw hole 23 parallel to the sliding direction of the rotation adjusting lid 16. On the other hand, the handle shaft 25 is inserted into the hole 24 provided in the casing 1, and the male screw 26 provided at one end of the handle shaft 25 is screwed into the screw hole 23. The handle shaft 25 is a casing 1
Collars 27 and 28 that contact the front and back surfaces of the handle shaft 25 are provided, and the handle 29 is fixed to the other end of the handle shaft 25.

Therefore, when the handle 29 is rotated from the outside of the wood drying device, the rotation adjusting lid 16 causes the guide rail 2 to move.
By sliding along 0, the opening degree of each gas flow hole 15 is adjusted. In the above embodiments, the opening of each gas flow hole 15 is adjusted by manually operating the handle 29. However, instead of the handle 29, a pulse motor that drives the handle shaft 25 to rotate is installed, and the timber storage chamber is installed. It is also possible to provide a sensor for detecting the gas concentration in the No. 4 and to provide an automatic control device for receiving the signal of the sensor and controlling the rotation amount of the pulse motor.

The safety lid 19 is for relaxing the pressure when the pressure of the combustion gas generating furnace 3 suddenly rises abnormally, and the number of the safety lids 19 to be installed is determined in consideration of the safety of the wood drying apparatus. The safety lid 19 may be provided not only on the casing 1 but also on the partition wall 2 so that the pressure of the combustion gas generation furnace 3 is released to the wood storage chamber 4. In this embodiment, the safety lid 19
2 is provided on the side wall of the casing 1, three places on the ceiling of the casing 1, and two places on the partition wall 2 (see FIG. 1).

A safety lid 19 provided on the casing 1,
Since the safety lid 19 provided on the partition wall 2 has the same structure, the safety lid 19 provided on the casing 1 will be described. The safety lid 19 has a casing 1 above the through hole 17.
A pair of bearings 30 provided on the outer wall surface of the bearing, and a support shaft 31 protruding from both side wall surfaces are supported by the bearings 30, respectively. Spring support portion 33 that is erected and bent at the tip
a spring support shaft 33 on which a is formed, and a spring support portion 34 fixed to the outer wall surface of the casing 1 below the through hole 17,
A spring 35 whose both ends are stretched over the spring support portions 33a and 34.
And (see FIG. 4).

Next, the operation of the wood drying apparatus configured as described above will be described. When the opening adjustment lid 16 fully closes the gas flow hole 15 of the partition wall 2, the gas in the combustion gas generation furnace 3 is supplied to the wood storage chamber 4 only through the combustion gas supply passage 5. When increasing the supply amount of the combustion gas, the handle 29 may be rotated to move the opening adjustment lid 16 to open the gas circulation hole 15, so that the supply amount can be easily adjusted.

The lid main body 32 of the safety lid 19 is pressed against the outer wall surface of the casing 1 by the spring 35, and the through hole 17 is normally provided.
Is closed. When the damper 8 of the combustion air introducing passage 7 is opened to supply fresh air to the combustion gas generating furnace 3 in order to increase the temperature at the time of starting combustion or during combustion, when the air supply amount is large, the combustion gas is generated. The gas having a low oxygen concentration filling the furnace 3 may explode and burn. At this time, the lid body 32 rotates in the direction of the arrow R against the spring 35 to open the through holes 17 and 18, so that the high pressure gas in the combustion gas generating furnace 3 passes through the through hole 17 and is discharged to the outside. Then, a part of the high-pressure gas passes through the through-holes 18 and diffuses into the wood storage chamber 4 to prevent the combustion gas generation furnace 3 from being damaged and prevent backfire to the combustion air introducing passage 7. It

[0021]

Since the present invention is constructed as described above, it has the following effects. (1) In the conventional wood drying device, since the combustion gas supply passage has a constant area, the amount of combustion gas supplied from the combustion gas generation furnace to the wood storage chamber cannot be finely adjusted. It has become possible to easily fine-tune the amount of combustion gas supplied to the wood containing chamber by adjusting the opening of the gas flow hole by rotating operation (or by automatic control). (2) When the low oxygen concentration gas filled in the combustion gas generation furnace is explosively burned by the supplied air,
The safety lid automatically opens the through hole, and high-pressure gas is released from the through hole, so that damage to the furnace wall of the combustion gas generation furnace and gas backfire to the combustion air introduction path are prevented. Became.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a wood drying apparatus.

FIG. 2 is a partially enlarged view of FIG. 1 showing the periphery of an opening adjustment lid.

FIG. 3 is an exploded perspective view of an opening adjustment lid attached to a partition wall.

FIG. 4 is a partially enlarged view of FIG. 1 showing the periphery of the safety lid.

FIG. 5 is a vertical sectional view of a conventional wood drying apparatus.

[Explanation of symbols]

 1 Casing 2 Partition 3 Combustion Gas Generator 4 Wood Storage Chamber 5 Combustion Gas Supply Channel 7 Combustion Air Introduction Channel 15 Gas Flow Channel 16 Opening Adjustment Lid 17, 18 Through Hole 19 Safety Lid 25 Handle Shaft 26 Male Thread 29 Handle 30 Bearing 32 Lid body 35 Spring

Claims (2)

(57) [Claims] 1. A partition wall for partitioning a combustion gas generation furnace and a wood storage chamber is provided inside a sealable casing, and a combustion gas supply path communicating from the combustion gas generation furnace to the wood storage chamber is provided above the partition wall. A wood drying device for heating and drying the wood in the wood containing chamber by the combustion gas generated in the combustion gas generating furnace, the air introducing path is provided in the combustion gas generating furnace, and the gas discharge path is provided in the wood containing chamber. In the above, the partition wall is provided with a gas flow hole that communicates the combustion gas generation furnace and the wood storage chamber, and an opening adjustment lid that is movable along the partition wall and that opens and closes the gas flow hole is provided. A wood drying device characterized in that 2. A through-hole is provided in at least one of the casing or the partition wall, and a safety lid is provided in the through-hole to open the through-hole when the pressure in the combustion gas generation furnace reaches a predetermined high pressure or higher. The wood drying apparatus according to claim 1, wherein the wood drying apparatus is provided.