JP2001162604A - Timber dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a timber dryer for realizing complete drying up to the interior of the timber in a short time having an excellent thermal efficiency. SOLUTION: A through hole penetrating through a drying chamber is perforated at a drying chamber body 1. The radiating part 22 and a burner 21 of a heater mechanism 2 are disposed in and out of the hole. A baffle 3 for diffusing a heat flow is interposed between the radiating front surface in the chamber and a timber containing position, and an openable and closable damper 5 is provided at a suitable position on the surface of the wall of the chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying wood used as a structural material for a house.

[0002]

2. Description of the Related Art Natural drying and artificial drying are known as means for drying wood. In artificial drying, the wood is stored in a predetermined drying chamber and supplied with high-temperature air or high-temperature steam. (High-temperature drying), drying means for reducing the boiling point by reducing the pressure in the drying chamber (vacuum drying), drying means for supplying low-temperature smoke (smoke drying), and the like are further known. Drying means (high-frequency drying) for boiling water is also known.

[0003] Natural drying depends on the weather and requires a number of days, so that rapid drying is not performed. Vacuum drying and high frequency drying increase equipment costs, and smoke drying requires complete drying. It takes days and cannot be used for pillars exposed indoors. For this reason, the simplest and most widely used are high-temperature drying means.

As a high-temperature drying apparatus, a circulating structure in which hot air heated by a heating section provided outside the drying chamber is supplied into the drying chamber, air in the drying chamber is introduced into the heating section, and returned to the drying chamber as hot air again. Has been adopted. However, first, by providing the heat source outside, there is naturally heat loss in the supply path from the external heat source to the drying chamber. And if it has a hot air circulation structure, the drying atmosphere will maintain a high humidity state, it will take time for complete drying, and if the surface is dried first, the dried surface will become an insulating structure, and the core part will not be dried There are problems such as.

Accordingly, the present invention proposes a novel drying device which has good thermal efficiency and quickly dries a wood core.

[0006]

The wood drying apparatus according to the present invention comprises:
The inside surface was made of metal, and a through-hole was formed on one surface of the drying room whose outside was covered with a heat insulating layer, and a radiator was provided on the indoor side of the through-hole, and the radiator was connected to the radiator on the outside. Provided in the burner section, a partitioning section for diffusing heat flow is interposed between the radiation front surface in the drying chamber and the wood storage section, and a damper section that can be opened and closed is provided at an appropriate location on the wall of the drying chamber. It is.

[0007] As described above, when the wood is stacked and stored at a predetermined interval in the drying chamber, and a high-temperature heat flow due to fuel combustion is injected into the drying chamber from the radiator by fuel injection from the burner section. The high-temperature heat flow is diffused in the partition portion, and immediately brings the room temperature to a high temperature state (about 120 ° C. as a guide), thereby causing the wood-containing moisture to boil. When the boiling state is maintained, the room is filled with an atmosphere containing high temperature and humidity, and the heat supply from the burner portion naturally includes the outside air, so that the room is in a higher pressure state than the outside air. Therefore, when the damper portion is appropriately opened, the indoor atmosphere containing a large amount of high temperature and humidity is released to the outside. Further, since the drying chamber is covered with a heat insulating layer, the amount of heat released from the burner section is adjusted so as to maintain a desired indoor temperature, and the moisture inside the wood is released to the atmosphere by opening and closing the damper appropriately, Further, releasing the atmosphere to the outside of the room is continued for a predetermined time to dry the wood.

[0008]

Next, an embodiment of the present invention will be described. In the wood drying apparatus shown in the embodiment, a heater mechanism 2 is attached to a drying chamber main body 1, a partition section 3 and a duct mechanism section 4 are installed in the room, and a damper section 5 for releasing indoor atmosphere.
Is provided.

The main body 1 of the drying chamber is, for example, L12m × H2.
A 48 m × W 2.4 m elongated room (using a shipping container), an inner plate 11 is formed of an iron plate, and its outer periphery is covered with a heat insulating layer 12 and further covered with a non-combustible outer wall material 13. An opening / closing door 14 is provided at an end face portion, and a temperature sensor 15 is provided at an appropriate place in the room. Note that a suitable laminated wood transport mechanism (not shown) such as a rail or a roller conveyor is installed on the indoor floor surface.

The heater mechanism 2 has a structure similar to that of a commercially available oil heater, and includes a detachable burner 2.
1 and a radiator 22. The burner section 21 has a ventilation fan and a fuel injection pump therein, and is additionally provided with a fuel tank.The heat radiating section 22 receives the fuel injection of the burner section 21 and the combustion air to perform combustion and glows red, Alternatively, it receives the burner flame from the burner section 21 and emits heat by red heating. And the drying room body 1
Two through holes 23 formed in the opposite end face of the opening / closing door 14
The heat radiator 22 is attached and fixed to the indoor side of the vehicle, and the burner 21 is attached to and detached from the heat radiator 22 from outside. When the burner portion 21 is removed, a closing plate 24 for closing the through hole 23 is attached.

The partition 3 is provided between the front of the heat radiator 22 in the drying chamber and the storage space B for the wood A to be dried in the room, and the high-temperature heat flow from the heat radiator 22 directly flows into the wood A. In order to prevent it from hitting (it ignites the wood due to high temperature) and to make the indoor temperature uniform,
The shape is such that the heat flow from is diffused.

The duct mechanism 4 includes a blower tube and a blower 41. The blower 41 is disposed outside the room similarly to the burner unit 21, and the blower tube on the suction side of the blower 41 is connected to the intake pipe 4.
2, and the front end thereof was opened in the space above the place where the heat radiating section 22 was installed. The damper unit 5 is provided on the opening / closing door 14 to block ventilation between the inside and outside of the room.

Next, the process of drying wood using the above-described drying apparatus will be described. The wood A to be dried has a predetermined interval between adjacent woods, and a support C made of a metal square cylinder made of iron or aluminum is interposed between the upper and lower layers,
The wood A is stored in the drying chamber main body 1 in such a manner that drying of the wood A is promoted.

Next, when the fuel is injected from the burner portion 21 and the combustion air is fed and ignited, the high-temperature combustion gas is injected and supplied into the drying chamber main body 1 from the heat radiating portion as a high-temperature heat flow. Is scattered by colliding with the partition part 3, wrapping around the partition part 3 and flowing into the storage space B, and is also discharged to the space on the opposite side to the heat radiation part 22 through the duct mechanism part 4.

Particularly, since the combustion gas for drying is directly generated in the drying chamber, the thermal efficiency is good, and the high temperature air is discharged from several places in the space below the wood storing place by the duct mechanism 4. In a short time, the inside of the drying chamber becomes a uniform high temperature state (120 ° C. or higher). Then,
Not only the surface of the wood dries, but the water inside the wood also boils, so only the surface dries and does not become a heat-blocking state for the core, and the boiling water from inside the wood is continuously released from the wood surface As a result, the water is removed from the core portion quickly.

When the boiling state of the wood moisture is maintained, the inside of the drying chamber main body 1 is filled with an atmosphere containing high temperature and humidity, and the combustion gas is constantly blown from the heater mechanism 2. The inside of the main body 1 is in a higher pressure state than the outside air. Therefore, when the humidity of the internal atmosphere increases, the damper unit 5 is opened. By opening the damper part 5, the indoor atmosphere containing a large amount of high-temperature moisture is released at a stretch to the outside of the room.

In the above-described embodiment, two heaters are incorporated in particular, and at the beginning of the drying operation, the room temperature in the drying chamber main body 1 is raised at a stretch. However, since the drying chamber main body 1 itself has a heat insulating structure, For maintaining the room temperature, only a single heater mechanism is operated, and the other is stopped. Therefore, when the initial drying is completed, one burner section 21 is separated from the heat radiating section 22, the through-hole 23 is closed by the closing plate 24, and only one of the heater mechanisms is operated to perform steady drying.

In the steady drying, the combustion in the heater mechanism 2 is adjusted while monitoring the room temperature with the temperature sensor 15 in the drying chamber main body 1. Further, the operation of the heater mechanism 2 raises the indoor pressure. The opening and closing of the section 5 appropriately releases the outside air in a high-humidity atmosphere in the room, and finishes the drying in two to three days and nights. In particular, the closing plate 24 prevents the escape of the hot air from the room and also prevents the problem of corrosion of the burner portion 21 due to the backflow of the high humidity air.

[0019] The above-mentioned wood drying has some considerations such as the fuel, the water content of the wood, and the heat insulation structure of the drying room. Was able to finish.

When the drying is completed, the dried wood is carried out of the door from the opening / closing door 14, the wood to be dried is carried in again, the burner 21 removed is mounted, and the next drying operation is performed.

The present invention is not limited to the above-described embodiment. For example, the heater mechanism may be a gas burner other than a kerosene burner, and the burner mechanism can secure a predetermined initial heat quantity and a predetermined heat quantity. If regular operation is possible, a single installation may be used instead of multiple installations.

[0022]

As described above, according to the present invention, the inside and outside through holes are formed in the drying chamber, and the heat radiating portion and the burner portion of the heater mechanism are arranged inside and outside of the through holes. A drying unit with a partition that spreads the heat flow between the storage location and a damper that can be opened and closed at the appropriate location on the wall of the drying chamber. By generating combustion gas directly in the drying chamber, thermal efficiency is improved. The drying chamber is heated to a high temperature while preventing the burning of the wood by direct injection of the combustion gas onto the dried wood, and the moisture is removed from the wood by boiling the moisture contained in the wood. It accelerates and realizes drying in a short time.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention.

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

FIG. 3 is an explanatory diagram of a heater mechanism mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room main body 11 Inner board 12 Heat insulation layer 13 Non-combustible outer wall material 14 Opening / closing door 15 Temperature sensor 2 Heater mechanism 21 Burner part 22 Heat radiating part 23 Through hole 24 Closure plate 3 Screen part 4 Duct mechanism part 41 Blower 42 Intake pipe (Blow pipe) ) 43 Hot air exhaust pipe (blower pipe) 5 Damper part

Claims (3)

[Claims] An inside / outside through-hole is formed in one side of a drying chamber in which the inside is made of metal and the outside is covered with a heat insulating layer, and a heat radiating portion is provided on the indoor side of the through-hole, A burner section connected to the heat radiating section is provided, a partitioning section for diffusing heat flow is interposed between the front of the heat radiating section in the drying chamber and the wood storage area, and a damper section that is freely openable and closable is provided at an appropriate place on the wall of the drying chamber. A wood drying device, characterized by: 2. A plurality of through holes are provided side by side, each of which is provided with a heater mechanism which is composed of a heat radiating portion and a burner portion and which is detachable and detachable, and a closing plate for closing the through hole when the burner portion is separated can be attached. Item 1. A wood drying apparatus according to Item 1. 3. A duct mechanism section comprising a blower pipe connecting the periphery of the partition, an upper space of the heater mechanism installation location, and several appropriate spaces below the wood storage location, and a blower interposed in the middle of the blower pipe. The wood drying apparatus according to claim 1, wherein the wood drying apparatus is provided.