KR101697355B1 - Apparatus for drying and high heat-treating wood - Google Patents

Abstract

The present invention relates to an energy-saving and high-efficiency hybrid apparatus for drying and high-thermally treating wood by using a microwave and recovery of waste heat, which achieves the energy-saving by using heat in pre-treatment of the wood after recovering the heat discharged to the outside as waste heat and also allows the dry and high thermal treatment of the wood to be more rapidly and safely conducted. The apparatus according to the present invention comprises: a heat treatment chamber (10) having a hollow cylindrical shape to accommodate the wood; a carriage (20) provided in the heat treatment chamber (10); a heater (30) installed within the heat treatment chamber (10); an air circulation fan (40) installed within the heat treatment chamber (10); a steam generator (50) installed outside the heat treatment chamber (10) to supply steam thereto; an exhaust valve (60) installed in the heat treatment chamber (10); a pretreatment unit (70) installed outside the heat treatment chamber (10) and pretreating the wood through the waste heat; a cooling unit (80) installed in the heat treatment chamber (10); and a microwave generator (90) installed in the heat treatment chamber (10).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-efficiency hybrid wood drying and high-temperature treatment apparatus using microwave and waste heat recovery,

More particularly, the present invention relates to a wood drying and high-temperature treatment apparatus, more specifically, to recover heat discharged from waste heat to be used for pretreatment of wood, thereby saving energy, And an energy saving type high efficiency hybrid wood drying and high temperature treatment apparatus using waste heat recovery.

In general, wood has a relatively high moisture content at logging. If you make a product using the same timber as the timber, the product will be deformed over time. Thus, timber that has been cut requires an appropriate drying process.

Drying methods of wood include natural drying and hot air drying. Natural drying is a method in which wood is piled up in a drying area and drying is carried out using atmospheric temperature, humidity and wind. It takes a long time and requires a wide drying area and it can not be dried below the moisture content of the foundation.

On the other hand, the hot-air drying is a method of drying by adjusting the drying conditions such as the temperature, humidity and wind speed of the drying chamber artificially, the drying time is relatively short,

When the wood is dried and subjected to a high heat treatment process, the water content is drastically lowered and the water absorption capacity is lowered, and the hemicellulose, which is the food of the bacteria among the components constituting the wood, is decomposed, making it difficult for the spoilage bacteria to live. Thus, the drying and high heat treatment of the wood can significantly improve the durability of the wood. In recent years, wood has been used for various purposes by drying and high-temperature treatment.

Conventional apparatuses for drying and high-temperature treating wood include, for example, an apparatus in which an electric heater is directly installed in a drying chamber to heat the inside air, and a device for drying the heated air through a hot air blower An apparatus for injecting the superheated steam into the chamber, an apparatus for indirectly heating the air in the drying chamber by injecting the heating medium into the drying chamber after heating the heating medium in the combustion apparatus, and a device for injecting the superheated steam into the drying chamber.

However, the above-described conventional techniques have the following problems.

Conventional wood drying and high-temperature treatment apparatuses have problems in that the heat used for drying and high-temperature treatment is discharged to the outside as waste heat after drying and high-temperature treatment are completed, resulting in excessive energy waste.

This waste of energy is a major cause of rising production costs of dry and high heat treated timber.

Registration No. 10-1338651 entitled "Wood drying and high-temperature treatment apparatus" (2013.12.02.)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a microwave oven for recovering heat discharged from waste heat to be used for pretreatment of wood to reduce energy, to make drying and high-temperature treatment of wood faster and stably, Efficiency hybrid wood drying and high-temperature treatment apparatus.

In order to achieve the above object, an energy saving type high efficiency hybrid wood drying and high temperature treatment apparatus using microwave and waste heat recovery according to the present invention is characterized in that a rail is installed on an inner lower surface, a door is installed on a front surface, A heat treatment chamber for forming a space that can be hermetically sealed; A bogie which is provided at an upper end of the rail and can be inserted into or removed from the heat treatment chamber along the rail and on which the wood is loaded; A heater installed on an inner surface of the heat treatment chamber and heating the air inside the heat treatment chamber; An air circulation fan installed on an inner surface of the heat treatment chamber and circulating air inside the heat treatment chamber; A steam generator installed outside the heat treatment chamber and connected to the steam supply pipe connected to the heat treatment chamber to supply steam to the heat treatment chamber; An exhaust valve connected to an upper portion of the heat treatment chamber and exhausting the heated air from the heat treatment chamber to the outside when the heat treatment chamber is at a predetermined pressure or higher; A pretreatment unit connected to the exhaust valve and configured to primarily dry and heat the wood before being accommodated in the heat treatment chamber using waste heat discharged from the exhaust valve; The pretreatment unit includes a connection pipe connected to the exhaust valve, a plurality of injection pipes connected to an end of the connection pipe, a pretreatment chamber in which the injection pipe is installed to pass through, , And the like.

The present invention also relates to an energy saving type high efficiency hybrid wood drying and high temperature treatment apparatus using microwave and waste heat recovery, which is installed in the heat treatment chamber to cool the heat treatment chamber to cool the dried and heat treated wood, Wealth; Wherein the cooling unit includes a water tank installed outside the heat treatment chamber and storing water, a first circulation pipe having one end connected to the water tank and connected to the water tank, and a second circulation pipe installed on the pipe of the first circulation pipe A first main pipe connected to the other end of the first purge pipe and installed in the longitudinal direction at an upper portion of the heat treatment chamber, a second main pipe installed in a longitudinal direction at a lower portion of the heat treatment chamber, A plurality of cooling pipes communicably connected between the first main pipe and the second main pipe and provided inside the heat treatment chamber in a zigzag form and a second circulation pipe connected to the second main pipe and the water pump in a communicated manner, , And the like.

Further, the steam generator of the "energy-saving hybrid high-efficiency wood drying and high-temperature treatment apparatus using microwave and waste heat recovery" according to the present invention is characterized in that steam is supplied to the steam supply pipe through the steam supply pipe A bypass pipe connected to the steam supply pipe to bypass the steam heater; a first opening / closing valve installed in the steam supply pipe between the bypass pipe and the steam heater; And a second open / close valve installed in the bypass pipe, wherein the cooling unit further includes a hot water supply pipe communicably connected between the water tank and the steam generator, and a third open / close valve installed in the hot water supply pipe .

In accordance with the present invention, an "energy efficient hybrid wood drying and high-temperature treatment apparatus using microwave and waste heat recovery" is provided in the heat treatment chamber. The microwave is directed toward the interior of the heat treatment chamber by power supply, A plurality of microwave generators for irradiating; A second chamber formed in the same size and shape as the first chamber and detachably flange-coupled to the first chamber, and a second chamber formed in the same size and shape as the first chamber, Further comprising a closed chamber detachably flange-coupled to an end of the second chamber and closed at one side to close the other end of the second chamber, wherein the first chamber or the second chamber is withdrawn or coupled So that the heat treatment capacity of the heat treatment chamber can be selectively controlled.

In the present invention as described above, energy recovered from waste heat is recovered and used for pretreatment of wood, energy is saved, drying and high-temperature treatment of wood is performed more quickly and stably, The waste is appropriately prevented, the production cost of the high heat treated wood is lowered, and the productivity of the heat treated wood is remarkably improved.

1 is a schematic side cross-sectional view of a wood drying and high temperature treatment apparatus according to the present invention,
2 is a schematic vertical cross-sectional view of a wood drying and high temperature treatment apparatus according to the present invention,
FIG. 3 is a schematic piping construction diagram of a wood drying and high-temperature treatment apparatus according to the present invention,
FIG. 4 is a schematic side elevational view showing a state before the removal of the second chamber of the wood drying and high-temperature treatment apparatus according to the present invention,
FIG. 5 is a schematic side elevational view showing a state after removing a second chamber of a wood drying and high-temperature treatment apparatus according to the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 to 5 are schematic views of a wood drying and high-temperature treatment apparatus according to the present invention. As shown therein, the wood drying and high-temperature treatment apparatus according to the present invention includes a hollow cylindrical heat treatment chamber 10 in which wood is accommodated, a bogie 20 provided in the heat treatment chamber 10, (10), an air circulation fan (40) installed inside the heat treatment chamber (10), and a heater (30) installed outside the heat treatment chamber (10) An exhaust valve 60 installed in the heat treatment chamber 10 and a pretreatment unit 70 installed outside the heat treatment chamber 10 for pretreating the wood through waste heat, A cooling unit 80 installed in the heat treatment chamber 10 and a microwave generator 90 installed in the heat treatment chamber 10.

The heat treatment chamber 10 is provided with a rail 11 on an inner lower surface thereof and a door 12 on a front surface thereof to provide a space for accommodating the wood in a sealed state.

The rails 11 are provided as a pair and serve to provide a traveling path in which the bogie 20 is moved horizontally along the inside of the heat treatment chamber 10. The door 12 is a known one capable of opening and closing one surface of the heat treatment chamber 10 in order to remove the bogie 20 from the inside and the outside of the heat treatment chamber 10.

As shown in FIGS. 4 and 5, the heat treatment chamber 10 having the above-described structure includes a first chamber 13 having a tubular shape to which the door 12 is closely attached, a first chamber 13 having the same size as the first chamber 13, A second chamber (14) formed in the shape of a second chamber (14) and releasably flangeably coupled to the first chamber (13), a second chamber (14) detachably coupled to the end of the second chamber (14) And a closed chamber (15) whose one side is opened and the other side is closed so as to close the end of the closed chamber (15).

The heat treatment chamber 10 has a structure in which the door 12, the first chamber 13, the second chamber 14, and the closed chamber 15 are sequentially detachably coupled to each other by a flange, The heat treatment capacity of the heat treatment chamber 10 can be selectively controlled by removing or combining the first chamber 13 or the second chamber 14. [ That is, as shown in FIG. 4, when the heat treatment chamber 10 is configured to couple the second chamber 14 to the first chamber 13, the high heat treatment capacity of the wood is doubled, When the heat treatment chamber 10 is constructed by disassembling the second chamber 14 in the first chamber 13, the high heat treatment capacity of the wood is reduced to half.

Thus, the heat treatment chamber 10 has a structure in which the door 12, the first chamber 13, the second chamber 14, and the closed chamber 15 can be disassembled and coupled with each other, So that unnecessary consumption of energy can be fundamentally prevented.

The bogie 20 is provided at the upper end of the rail 11 and serves to provide a place where the wood W is stacked on the rail 11 while moving horizontally along the rail 11, 10 to the inside or from the inside to the outside of the heat treatment chamber 10.

The heater 30 is installed on the inner surface of the heat treatment chamber 10 and is connected to an external power source to heat the inside of the heat treatment chamber 10 by supplying electricity.

The air circulating fan 40 is installed on the inner surface of the heat treatment chamber 10 and circulates the heated air in the heat treatment chamber 10 to the wood W So that the heated air circulates and flows. The air circulation fan 40 may be installed in the heat treatment chamber 10 at a plurality of positions.

The steam generator 50 is installed outside the heat treatment chamber 10 and is connected to a steam supply pipe 51 communicatively connected to the heat treatment chamber 10. The steam generator 50 is connected to the heat treatment chamber 10 through the steam supply pipe 51, (10). The steam supplied to the interior of the heat treatment chamber 10 by the steam generator 50 functions to dry and heat the wood while preventing the heat and cracking of the wood.

The steam generator 50 includes a steam heater 52 installed on a duct of the steam supply pipe 51 and heating the steam supplied through the steam supply pipe 51 to generate superheated steam, A bypass pipe 53 connected to the steam supply pipe 51 for bypassing the bypass pipe 53 and the steam heater 52 and a bypass pipe 53 connected to the steam supply pipe 51, (55) installed in the bypass pipe (53).

The steam heater 52 serves to generate steam as a high-temperature superheated steam by heating the steam supplied through the steam supply pipe 51 by the supply of electricity. The bypass pipe (53) bypasses the steam heater (52) to supply normal steam instead of superheated steam when superheated steam is unnecessary depending on the intention and selection of the operator or the kind of wood .

The first on-off valve (54) serves to open and close the supply of steam to the steam heater (52) while being automatically controlled by a controller by the operation of the operator, and the second on / off valve (55) And controls the opening and closing of the bypass pipe (53).

The exhaust valve 60 is installed to communicate with the upper part of the heat treatment chamber 10 and discharges the heated air from the heat treatment chamber 10 to the outside when the heat treatment chamber 10 reaches a certain pressure or more. It is a kind of safety valve that does. The exhaust valve 60 is a passage through which a considerable amount of high-temperature air is discharged to maintain a constant temperature and pressure during drying and high-temperature processing of wood into the heat treatment chamber 10.

The pretreatment unit 70 is installed in connection with the exhaust valve 60. The pretreatment unit 70 primarily uses the waste heat discharged from the exhaust valve 60 to dry and dry the wood before the heat treatment chamber 10 receives the waste heat. Heat treatment. That is, the pretreatment unit 70 recovers the waste heat discharged to the exhaust valve 60 and preprocesses the wood to be dried and thermally treated in the next step. Thus, the energy is remarkably reduced and the wood is pretreated and heated in the heat treatment chamber 10 The speed of drying and high heat treatment of the wood significantly increases and the productivity of the high heat treated wood is significantly increased.

The pretreatment unit 70 has a connection pipe 71 connected to the exhaust valve 60, a plurality of injection pipes 72 connected to the end of the connection pipe 71, And a pretreatment chamber 73 in which a capillary tube 72 is installed so as to penetrate and in which a door 74 is installed and in which wood is received.

The connection pipe 71 serves to supply the heat discharged from the exhaust valve 60 to the injection pipe 72 and the injection pipe 72 is connected to the wood accommodated in the pre- The pre-treatment chamber 73 serves to hermetically receive the wood to be pretreated, and the opening / closing door 74 is connected to the front of the pretreatment chamber 73 And serves to provide a passage for transferring the wood to and from the inside.

The cooling unit 80 is installed in the heat treatment chamber 10 to cool the heat treated chamber 10 to cool the dried and heat treated wood.

The cooling unit 80 includes a water tank 81 provided outside the heat treatment chamber 10 for storing water and a first circulation pipe 82 connected at one end to the water tank 81 A water pump 83 installed on a channel of the first circulation pipe 82 and a water pump 83 connected to the other end of the first purge pipe and installed in the longitudinal direction of the heat treatment chamber 10, A second main pipe 85 provided in a longitudinal direction at a lower portion of the heat treatment chamber 10 and a second main pipe 85 communicating with the first main pipe 84 and the second main pipe 85, A plurality of cooling pipes 86 provided in the heat treatment chamber 10 in a connected and zigzag fashion and a second circulation pipe 86 connected to the second main pipe 85 and the water pump 83 87).

The water in the water tank 81 flows into the first circulation pipe 82, the first main pipe 84, the cooling pipe 86, The main circulation pipe 85 and the second circulation pipe 87 to the water tank 81 to cool the heat treatment chamber 10 through the cooling pipe 86 while circulating in the closed loop do.

As the heat treatment chamber 10 is cooled through the cooling pipe 86, the heated air in the heat treatment chamber 10 is cooled to cool the wood contained in the heat treatment chamber 10.

The cooling unit 80 includes a hot water supply pipe 88 communicating with the water tank 81 and the steam generator 50 and a third on-off valve 89 installed in the hot water supply pipe 88 .

The hot water heated and heated by the cooling unit 80 while cooling the heat treatment chamber 10 is stored in the water tank 81. The hot water stored in the water tank 81 is used for drying and heat- The hot water supply pipe 88 is opened by the third on-off valve 89 to supply the steam to the steam generator 50.

By supplying hot water of high temperature to the steam generator 50, the steam can be easily generated with a small energy, so that energy can be saved and recovered.

The microwave generator 90 is installed in the heat treatment chamber 10 in a plurality of ways. The microwave generator 90 irradiates microwaves toward the inside of the heat treatment chamber 10 by supplying power to heat and heat the wood, .

As described above, the present wood drying and high-temperature treatment apparatus simultaneously drives the heater 30 and the microwave generator 90 to more efficiently dry and heat the wood contained in the heat treatment chamber 10.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: Heat treatment chamber
11: rail 12: door
13: first chamber 14: second chamber
15: Closed chamber
20: Bogies
30: Heater
40: Air circulation fan
50: Steam generator
51: steam supply pipe 52: steam heater
53: bypass pipe 54: first opening / closing valve
55: second opening / closing valve
60: Exhaust valve
70:
71: Connector 72: Dispenser
73: pretreatment chamber 74: opening / closing door
80:
81: water tank 82: first circulation pipe
83: Water pump 84: First main piping
85: second main pipe 86: cooling pipe
87: second circulation pipe 88: hot water supply pipe
89: Third open / close valve
90: Microwave generator
W: Wood

Claims (4)

A heat treatment chamber 10 having a rail 11 on its inner surface, a door 12 on its front surface, and a space for receiving the wood in a sealed state;
A bogie 20 provided at an upper end of the rail 11 and capable of being inserted into or removed from the heat treatment chamber 10 along the rail 11 and having wood on the upper surface thereof;
A heater (30) installed on an inner surface of the heat treatment chamber (10) and heating the air inside the heat treatment chamber (10);
An air circulation fan (40) installed on an inner surface of the heat treatment chamber (10) and circulating air inside the heat treatment chamber (10);
A steam generator 50 installed outside the heat treatment chamber 10 and connected to the steam supply pipe 51 connected to the heat treatment chamber 10 to supply steam to the heat treatment chamber 10;
An exhaust valve 60 communicating with the upper portion of the heat treatment chamber 10 and discharging the heated air from the heat treatment chamber 10 to the outside when the heat treatment chamber 10 is at a predetermined pressure or higher;
A pretreatment unit 70 connected to the exhaust valve 60 and configured to primarily dry and heat the wood before being accommodated in the heat treatment chamber 10 using waste heat discharged from the exhaust valve 60 ; Including,
The preprocessing unit (70)
A connection pipe 71 connected to the exhaust valve 60,
A plurality of injection pipes 72 connected to ends of the connection pipe 71,
And a pretreatment chamber 73 in which the jetting pipe 72 is installed so as to penetrate and has an opening and closing door 74 and in which wood is received. The microwave and the energy saving type high efficiency hybrid timber drying process using waste heat recovery, High temperature treatment device.
The method according to claim 1,
The wood drying and high-
A cooling unit 80 installed in the heat treatment chamber 10 for cooling the heat treatment chamber 10 to cool the dried and heat treated wood; Further included,
The cooling unit (80)
A water tank 81 installed outside the heat treatment chamber 10 and storing water,
A first circulation pipe 82 connected at one end to the water tank 81,
A water pump 83 installed on the pipe of the first circulation pipe 82,
A first main pipe 84 connected to the other end of the first circulation pipe and installed longitudinally at an upper portion of the heat treatment chamber 10,
A second main pipe 85 installed in the longitudinal direction at a lower portion of the heat treatment chamber 10,
A plurality of cooling pipes 86 communicably connected between the first main pipe 84 and the second main pipe 85 and provided in the heat treatment chamber 10 in a staggered manner,
And a second circulation pipe (87) communicably connected to the second main pipe (85) and the water pump (83). The microwave and the energy saving type high efficiency hybrid wood drying and high heat Processing device.
3. The method of claim 2,
The steam generator (50)
A steam heater 52 installed on a pipe of the steam supply pipe 51 and heating the steam supplied through the steam supply pipe 51 to generate superheated steam,
A bypass pipe 53 connected to the steam supply pipe 51 to bypass the steam heater 52,
A first on-off valve 54 installed in the steam supply pipe 51 between the bypass pipe 53 and the steam heater 52,
And a second on-off valve (55) installed in the bypass pipe (53)
The cooling unit (80)
A hot water supply pipe 88 communicably connected between the water tank 81 and the steam generator 50,
Further comprising a third on-off valve (89) installed in the hot water supply pipe (88). The energy saving type high efficiency hybrid wood drying and high temperature treatment apparatus using microwave and waste heat recovery.
The method according to claim 1,
The wood drying and high-
A plurality of microwave generators (90) installed in the heat treatment chamber (10) and irradiating microwaves toward the interior of the heat treatment chamber (10) by supply of power; Further included,
The heat treatment chamber (10)
A first tubular chamber 13 to which the door 12 is closely attached,
A second chamber 14 formed in the same size and shape as the first chamber 13 and detachably flange-coupled to the first chamber 13,
Further comprising a closed chamber (15) detachably flangeably coupled to an end of the second chamber (14) and having one side opened and one side closed to close the end of the second chamber (14) The first chamber 13 or the second chamber 14 is pulled out or combined to selectively control the heat treatment capacity of the heat treatment chamber 10. The microwave and the energy saving high efficiency hybrid wood drying using the waste heat recovery And a high-temperature treatment apparatus.

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