JP2001133147A - Smoking seasoning method for lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of smoking and seasoning lumber capable of shortening days for seasoning the lumber, with the decayless lumber with the decreased rate of bowing and cracking occurrence, antifugal and insect fuge effects, and encouraged preservation effect. SOLUTION: A solution proceeded from smoking and seasoning process is utilized for immersing lumber into the solution prior to smoking and seasoning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timber for providing wood in a short period of time as a building material of a structure having decay resistance such as fungicide, antiseptic or insect repellent, or a constituent material such as a fitting. Is the smoke drying method.

[0002]

As a method for drying wood,
There are natural drying and artificial drying, which are roughly divided into two types.The artificial drying includes gas, electricity, drying using a heat source such as steam, and drying under reduced pressure using heating or high frequency.
And dehumidification drying.

[0003] Each of the drying methods shortens and specifies the number of drying days, and is satisfactory in terms of wood processing, equipment and energy costs, water content of finished materials, and the like, which are relatively free from warping and cracking. I can't.

[0004]

SUMMARY OF THE INVENTION The present invention utilizes a liquid smoke resulting from smoke drying, so that the cut wood is immersed in the liquid smoke and then smoke dried. This shortens the drying days, reduces the incidence of warpage and cracking,
It is intended to obtain rot-resistant wood having an insect repellent effect and a high antiseptic effect.

[0005] Tree growth sucks nutrients and water from the roots,
It performs photosynthesis and CO ₂ uptake from the leaves, acetylates in the trees, gives distortion to the cells in the wood, and at the same time performs the natural action of opening the water stop valve (pit) that controls the flow of nutrient sap. As long as this effect continues, the tree grows without dying and can last for decades and hundreds of years.

However, when the tree is cut down, the water stop valve closes due to the surface tension of the sap, and the natural action stops, so that the cells in the wood remain rich in water. . When the decay fungi enter the water, the wood starts to corrode.

[0007] Therefore, the present invention provides a water-stop valve by immersing the cut wood in a smoke solution, thereby sending wood vinegar, wood tar, and the like contained in the smoke solution into the cells of the wood to exhibit a pseudo-growth state. By allowing the water to open and allowing smoke to dry in this state, the heated wood releases water from the wood cells while maintaining the normal temperature of the wood, and the remaining sap of nutrients is Combines with the components of smoke or smoke to solidify and complete high quality drying.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a method for smoke-drying wood in which wood is immersed in a smoke liquid and then smoke-dried at a low temperature. Further, the present invention provides a method in which the cut wood before being smoke-dried is immersed in a smoking liquid generated when the wood is smoke-dried, and then the wood center temperature is reduced to 70 to 100%.
Smoke drying of wood consisting of a process of low-temperature smoke drying at 90 ° C. for 5 to 10 days depending on the wood to be dried and the outside air temperature, and then leaving until the difference between the outside air temperature and the center temperature of the wood is within 8 ° C. It is a construction method.

[0009] The smoke is extracted by cooling the exhaust gas when the wood is smoke-dried. Then, the wood is immersed in a dipping tank containing a smoke solution. Alternatively, the smoking liquid may be sprayed or applied to the wood.

[0010] The drying is performed by installing an air convection fan at an appropriate place in a room having a furnace on the floor and a wooden pile at the center of the room, and a fire-resistant drying room provided with an air adjusting hole on the furnace wall. Do with. The furnace is of a surface combustion type that burns from the upper layer to the lower layer. According to this method, the fuel emits only smoke and temperature without burning up, and is smoked. So the furnace
Waste materials such as wood chips, demolition materials, and wood chips are put as burning materials, and the upper and lower surfaces thereof are covered, and waste materials such as planner waste, bark, bark, foliage, waste paper, etc., which are easily burned, are disposed as ignition materials. By igniting the ignition material, the fire spreads over the entire surface and the internal combustion material burns. The upper surface is covered with a heat-resistant steel plate lid and the overlapping gap is provided as a passage for heat and smoke.

The air is adjusted by a combustion air adjustment damper or forced air supply of carbon dioxide or oxygen so that the temperature detected by a temperature sensor disposed indoors and at the center of the wood stays in the range of 70 to 90 ° C. Smoke and hot air are sent to the wood piled on the upper part after incomplete combustion and low temperature smoke drying.
Smoke and hot air are evenly circulated between the piled woods by a room temperature adjustment damper and convection blowers arranged in various places in the room, and are dried at a low temperature for about 5 to 10 days. Wood center temperature is 85
° C is optimal.

After drying, the wood is allowed to stand until the difference between the room temperature, the core temperature of the wood and the outside air temperature is within 8 ° C., and then the wood is taken out. When drying, indoor expansion due to heat occurs. To cope with this, an exhaust duct having a regulating valve is attached to cope with this. Then, the smoke simultaneously discharged from the exhaust duct is sent to the cooling device to extract the smoke liquid.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The smoke-drying room was built with a fire wall 150-200
m ³ chambers and two furnaces 4 on or below the floor
The interior of each furnace is further divided into three sections a, b and c by a partition wall of a heat insulating material, a part of which is removed, and is continuous at a part where a part of the partition wall is removed. An air adjustment damper 3 is externally attached to each of sections A, B, and C so that the air amount can be automatically and manually adjusted by computer control. The upper surface of each furnace 4 covers the entire surface of each furnace such that iron lids partially overlap each other.

In the furnace 4, wood chips, demolition materials,
A burnable material such as wood chips is put in, and flammable waste materials such as planner waste, canna waste, bark, branches and leaves, waste paper, etc. are packed as an ignition material so as to cover the upper and lower surfaces.

Above the furnace 4 and in the center of the room, there is a smoke drying room 1 for laminating wood. An air convection device 5 is arranged on the ceiling and floor of the room, the convection device on the upper ceiling returns heated heated air downward, and the convection device on the lower floor reduces convection in the lateral direction of the floor surface. Do. In the drying room, the room temperature becomes 180 ° C as the temperature of the furnace reaches 300-380 ° C.
As a result, indoor air convection is required to prevent the wood from igniting, and the convection equalizes the temperature of the smoke in the room and maintains the room temperature at 70 to 90 ° C. Suitable temperature is 85 ° C.

During the smoking and drying, a large amount of water contained in fuel and wood is generated. The moisture is taken in so as not to disturb the combustion of the furnace and cooled by the cooling device 6, and the moisture is extracted by the smoke collecting device 7. The collected smoke is soaked in the wood before smoke drying.

After the smoke drying in the drying room is completed, the room is left open until the difference between the room temperature, the outside air temperature and the center temperature of the wood becomes 8 ° C. or less, and then the room is opened to carry out the wood.

[0018]

According to the present invention, the cut wood is immersed in this smoke liquid and then dried by smoking using the smoke liquid generated from the smoke drying, so that the wood can exhibit a pseudo-growth state and the water shutoff valve is provided. Opening causes the release of water in the cells in the wood, and completes high-quality drying. Accordingly, it is possible to obtain decay-resistant wood having a reduced number of drying days, a reduced rate of warpage and cracking, an antifungal effect, an insect repellent effect, and a high antiseptic effect.

In addition, since the present invention performs low-temperature smoke drying at 70 to 90 ° C., the aldehyde in the smoke combines with the lignin of the cellulose of the wood to generate heat, and the temperature inside the wood is reduced to room temperature. Since the temperature is higher than the temperature, uniform drying without unevenness in drying between the wood surface and the inside can be obtained, and wood with a beautiful grain without warp and cracks, and a smooth canna and saw can be obtained. Further, phenolic acid, which is a raw material of naphthalene, which is one of the components of smoke, provides antifungal property, insect repellent effect, and aldehyde imparts preservative effect.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the entire structure.

FIG. 2 is a plan view of a furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace 1 'Auxiliary furnace 2 Partition wall 3 Ignition port 4 Air control valve 5, 5' Lid 6 Gap 7 Burning material 8 Ignition material 9 Wood 10 Convection fan 11 Exhaust pipe 12 Cooling device 13 Exhaust temperature adjustment damper 14 Duct

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Taku Sugaoka 43-27 Nishi22-2-2, Towada-shi, Aomori F-term (reference) 3L113 AA01 AC03 AC21 AC50 AC51 AC54 AC63 AC67 AC73 AC75 BA05 CA04 CA08 CB02 CB24 CB34 DA06 DA10 DA21 DA24 DA30

Claims (2)

[Claims] 1. After soaking the wood before smoke drying in a smoke liquid,
Low-temperature smoke-drying method for smoke-drying wood. 2. The wood before smoke drying is immersed in a smoke liquid generated during the smoking and drying of the wood, and the wood center temperature is 70 to 90.
A method of smoking and drying wood, comprising a step of low-temperature smoking and drying at 5 ° C. for 5 to 10 days at a temperature of 10 ° C. depending on the wood to be dried and the outside air temperature, and then leaving until the difference between the outside air temperature and the center temperature of the wood is within 8 ° C.