KR101870091B1 - Apparatus for drying wood with different heating source - Google Patents

Abstract

The present invention relates to a cogeneration-type wood drying apparatus having different heating sources. The cogeneration-type wood drying apparatus having different heating sources comprises: a drying room divided into a heating chamber and a drying chamber by a partition having a hot air passage, wherein wood to be dried is accommodated in the drying chamber; a steam boiler which is installed in the heating chamber, and produces steam to be applied to the wood; an oil-fired boiler simultaneously operating with the steam boiler, and generating heat to be used with steam; a circulation inducing fan to circulate steam and heat in the drying room to repeatedly apply the steam and heat to the wood; and a controller to control the oil-fired boiler and steam boiler. Since the cogeneration-type wood drying apparatus having different heating sources simultaneously applies heat produced by the oil-fired boiler and high temperature steam from the steam boiler, the high temperature steam can infiltrate fibrous wood tissue spread by the heat to quickly perform drying. Also, a turning frame rotating in a manner of a turntable while supporting wood is included to apply heat to the wood while changing the position of the wood. Therefore, uniform heat and steam can be transferred to all sections of the wood to realize efficient drying performance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cogeneration type wood drying apparatus having a two-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood drying apparatus for drying wood, such as wood, on which wood is loaded, and more particularly, to a cogeneration type wood drying apparatus having a dual heat source in which a steam boiler and an oil boiler are operated simultaneously, will be.

It is slightly different depending on seasonal conditions at the time of planting and harvesting, but all logs contain a large amount of water. Since the moisture remains after the preparation, moisture must be removed through natural drying or artificial drying before making the desired product using the wood or lumber. When the product is made using the raw wood or the lumber (hereafter referred to as "wood") without moisture removed, the product is deformed such as shrinkage or twisting over time. Drying of wood is a very important basic step preceding all subsequent processes of handling wood.

On the other hand, there are natural drying methods and artificial drying methods for drying wood.

The natural drying method is a method of using atmospheric temperature and wind, that is to say, a method of drying the wood naturally by stacking the wood in a proper ventilated place. Such a natural drying method does not require a special technique or equipment for the drying process itself, but it requires a long drying time, requires a large space, and can not be dried below a certain water content, And there is a problem of damaging the wood.

On the other hand, the artificial drying method is a method of drying wood by loading wood in a drying room in which heating and ventilation devices are installed and generating heat and air, and the drying time is relatively short and the water content can be varied .

There are various types of wood drying apparatuses for performing the artificial drying method. Among them, for example, an electric heater is installed inside a drying room to directly heat the air inside the drying room, There are various types ranging from directing heat to a drying room using a hot air fan, or applying superheated steam to wood.

However, the conventional artificial drying apparatus has a disadvantage in that drying is performed by only one method. That is to say, it has a single heat source and provides only one drying method. For example, a drying apparatus equipped with an electric heating system performs drying using only electric energy, and a hot air drying system uses hot air only and a steam drying system uses only steam. Each heat medium has its advantages and disadvantages, but it means that it can not complement each other 's advantages and disadvantages.

Korean Patent Registration No. 10-0948625 (Wood heat treatment dryer) Korean Patent Registration No. 10-1302967 (Wood drying method using superheated steam) Korean Patent Registration No. 10-1371363 (Wood drying apparatus using superheated steam)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a turning frame which rotates in a turntable state in which wood can be quickly dried by simultaneously applying heat of an oil boiler and high temperature steam of a steam boiler, The object of the present invention is to provide a cogeneration-type wood drying apparatus having a different heat source that can achieve uniform drying and heat transfer of uniform heat and steam to all woods by changing the position of the wood.

In order to accomplish the above object, the present invention provides a cogeneration type wood drying apparatus having a different heat source, comprising: a drying room divided into a heating chamber and a drying chamber by barrier ribs having a hot air passage; A steam boiler installed in the heating chamber to generate steam to be applied to the wood; An oil boiler operating simultaneously with the steam boiler to generate heat for use with steam; A circulation induction fan circulating the steam and the heat inside the drying room so that steam and heat are repeatedly applied to the wood; And a controller for controlling the oil boiler and the steam boiler.

In the heating chamber, A superheated steam generator for superheating steam produced in the steam boiler; and a blower for leading the heat generated in the oil boiler to the drying chamber, wherein the drying chamber includes: A temperature sensor and a humidity sensor for detecting the temperature and humidity inside the drying chamber and transmitting the temperature and humidity to the controller; And a tension motor connected to the air volume control door and extending in the longitudinal direction, and a tension motor controlled by the controller and adjusting the position of the door by tensioning the wire .

In addition, a plurality of through holes are formed in the bottom of the drying chamber, and a perforated plate for supporting the wood by forming a bottom channel between the bottom and the bottom is provided. A steam induction pipe for receiving the superheated steam generated in the superheated steam generator into a bottom channel and injecting the superheated steam into the bottom channel through a plurality of nozzles and connected to the boiler, And the blower supplies air to a lower portion of the bottom channel so that the heat of the heat radiating portion and the superheated steam blown out from the steam induction pipe pass through the through hole to the drying chamber.

The drying chamber is provided with a center shaft vertically supported by a bearing and rotatable about an axis, and a driving unit for rotating the center shaft. The center shaft is fixed to a center shaft, And a turntable-shaped turning frame for supporting the turning frame; A steam induction pipe for receiving the superheated steam generated in the superheated steam generator into the interior of the turning frame and spraying the superheated steam upward by using a plurality of nozzles, Wherein the blower supplies air to the lower space of the turning frame to cause the heat of the heat dissipating unit and the superheated steam ejected from the steam induction pipe to flow upward toward the wood .

Further, in the upper part of the drying room, An upper channel having a vent hole opened to a drying chamber is installed on one side of the upper channel, and a dehumidifier and a secondary humidity sensor connected to the controller are installed in the upper channel, And an exhaust fan for discharging the hot air inside the upper channel to the atmosphere is installed at the downstream end of the upper channel and between the exhaust fan and the secondary humidity sensor, And a switching shutter for opening the ventilation hole and blocking a passage toward the exhaust fan or opening a passage for blocking the ventilation opening and leading to the exhaust fan is provided.

The cogeneration type wood drying apparatus having the different heat source of the present invention as described above simultaneously applies the high temperature steam of the oil boiler and the high temperature steam of the steam boiler so that the high temperature steam can penetrate into the fiber structure of the wood, Rapid drying can be performed.

In addition, since the turning frame rotates in a turntable manner while supporting the wood, heat is applied to the wood while changing the position of the wood, uniform heat and steam can be transmitted to all the woods, thereby realizing efficient drying performance.

FIG. 1 is a block diagram illustrating the construction of a cogeneration type wood drying apparatus having a different heat source according to an embodiment of the present invention. Referring to FIG.
2 is a view showing another embodiment of a cogeneration type wood drying apparatus having a different heat source according to an embodiment of the present invention.
3 is a view showing another embodiment of a cogeneration type wood drying apparatus having a different heat source according to an embodiment of the present invention.
4 is a perspective view of the turning frame shown in FIG.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Basically, the wood drying apparatus according to the present embodiment can efficiently dry not only the lumber but also the lumber not removed from the shell. This is because the oil boiler and the steam boiler are used in parallel. That is, as described later, since the heat generated in the oil boiler relaxes the internal structure of the wood, and the superheated steam penetrates into the relaxed internal structure of the wood to remove moisture therein, The drying speed and the drying efficiency are excellent.

FIG. 1 is a block diagram illustrating the construction of a cogeneration type wood drying apparatus having a different heat source according to an embodiment of the present invention. Referring to FIG.

1, the wooden drying apparatus 10 according to the present embodiment includes a drying chamber 12 for providing a space defined by a heating chamber 12a and a drying chamber 12b by a partition wall 12c, A steam boiler 16, an overheated steam generator 18, an oil boiler 20, a heat dissipating unit 22, a blower 23, and the like disposed at the lower end of the partition 12c, A passage opening / closing unit 30 provided at an upper end of the partition 12c, and a controller 24. The circulation induction fan 14 is installed in the upper part of the partition wall 12c.

First, the drying room 12 is a chamber for providing a space for accommodating the wood W to be dried, and has the partition 12c therein.

The partition wall 12c is an inner wall for partitioning the heating chamber 12a and the drying chamber 12b and has a hot air passage 12d at an upper portion thereof. The hot air passage 12d is a wind hole in which hot air generated in the heating chamber 12a is drawn into the drying chamber 12b. The hot air means a working fluid in which heat generated by the oil boiler and steam generated in the superheated steam generator 18 are mixed.

Particularly, the hot air passage 12d is regulated to be opened and closed by the passage opening / The passage opening and closing part 30 regulates the degree of opening of the hot air passage 12d and includes an air volume adjusting door 30d whose upper end is connected to the hinge 30e and can be pivoted up and down, A wire 30c fixed to the control door 30d and extended to the outside of the drying room 12, a support pulley 30b installed outside the drying room 12 and supporting the wire 30c, And a tension motor 30a for rotating the air volume control door 30d by moving the wire held in the support pulley 30b in the longitudinal direction. The tension motor (30a) is controlled by a controller (24).

The operator can adjust the rotation angle of the air volume control door 30d by controlling the tension motor 30a through the controller 24. [ The air volume adjusting door 30d may be fully lifted to fully open the hot air passage 12d or lower the air volume adjusting door 30d to block the hot air passage 12d.

Meanwhile, a steam boiler 16 and an overheated steam generator 18 are installed in the heating chamber 12a. The steam boiler 16 is a general boiler for producing steam, and operates under the control of the controller 24 to discharge steam of a desired temperature and pressure.

In addition, the overheated steam generator 18 receives the steam produced by the steam boiler 16 and turns the steam into an overheated steam state. Since the steam produced in general steam boilers does not reach 100% of the dryness, the superheated steam generator 18 is installed to produce steam having a dryness of 100%. Since the steam is not contained in the superheated steam, it can penetrate the inside of the structure of the wood w and efficiently remove moisture inside the structure.

In addition, a heat dissipating unit 22 and a blower 23 are further installed in the heating chamber 12a. The heat dissipation unit 22 is installed inside the heating chamber 12a in the case of FIG. 1 as a heat dissipation unit for dissipating the heat generated from the oil boiler 20 into the air. The heat radiating portion 22 provided in the heating chamber 12a can take the form of a radiator.

The heat releasing portion as the heat releasing portion takes the form of a pipeline as shown in Fig. 2, and may be disposed at the bottom portion of the drying chamber 12b.

The blower 23 is installed at a lower portion of the heat dissipating unit 22 and generates hot air by blowing air to the heat dissipating unit 22. The heat and steam generated in the heating chamber 12a ride on the air flow generated by the blower 23, for example, in the form of hot air, and move to the drying chamber 12b through the hot air passage 12d.

Although the oil boiler 20 is shown as being installed outside the heating chamber 12a in FIG. 1, it may also be installed inside the heating chamber 12a.

In any case, the hot air passed over to the drying chamber 12b is pulled downward by the action of the circulation induction fan 14 and is repeatedly circulated to the heating chamber 12a.

The hot air circulating along the path continually contacts with the wood and transfers its own heat to the wood so that the internal structure of the wood is relaxed and the steam component penetrates into the internal structure to remove moisture.

For reference, a large amount of water contained in the bark portion of the wood is evaporated and removed by the heat of the hot wind, and the moisture of the wood core portion is removed by the steam.

The circulation induction fan 14 is a fan controlled by the controller 24 and serves to take in the air inside the drying chamber 12b and move it to the heating chamber 12a. The position and the number of the circulation induction fans 14 can be changed according to the situation.

On the other hand, the drying chamber 12b is a space in which the wood w to be processed is loaded, and has an entrance (not shown) through which an operator can enter and exit. In addition, a temperature sensor 26 and a humidity sensor 28 are disposed in the drying chamber 12b.

The temperature sensor 26 senses the temperature inside the drying chamber 12b and the humidity sensor 28 senses humidity and transmits sensing information to the controller 24. The operator can grasp the situation inside the drying chamber 12b through the controller 24 and take appropriate measures.

2 is a view showing another embodiment of a cogeneration type wood drying apparatus having a different heat source according to an embodiment of the present invention.

Hereinafter, the same reference numerals as those of the above-mentioned reference numerals denote the same members having the same function, and a repeated description thereof will be omitted.

Referring to FIG. 2, it can be seen that the perforated plate 12f is fixed on the bottom portion 12e of the drying chamber 12b. The perforated plate 12f is horizontally positioned above the bottom portion 12e and has a plurality of through holes 12g as an iron plate for supporting the wood w to be processed. The through hole 12g is a hole through which the hot air raised from the bottom channel 12r to be described later passes.

An empty space between the perforated plate 12f and the bottom portion 12e is a bottom channel 12r. The bottom channel 12r is a space for guiding the air supplied from the blower 23 to the lower portion of the perforated plate 12f and has a steam induction pipe 19 and a heat radiating portion 22 therein.

The steam induction pipe 19 has a plurality of nozzles 19a as a pipeline for receiving superheated steam generated in the superheated steam generator 18 and guiding the superheated steam to the lower portion of the perforated plate 12f. The nozzle 19a functions to spray the steam inside the steam induction pipe 19 upward. The superheated steam ejected through the nozzle 19a passes through the through hole 12g and is transferred to the wood.

The heat dissipation unit 22 is connected to the oil boiler 20 and transmits heat generated from the boiler to the bottom channel 12r. I.e., the air in the bottom channel 12r. Air in the bottom channel 12r is transferred to the wood w together with the superheated steam in a heated state.

In addition, the blower 23 is installed such that the wind direction thereof is directed toward the bottom channel 12r. 1, the blower 23 of FIG. 2 blows air downward to enter the bottom channel 12r, although the wind direction of the blower 23 is directed upward.

On the other hand, an upper channel 12k is provided at an upper portion of the drying room 12. [ The upper channel 12k is a passage formed by a duct 12h extending in the horizontal direction and includes a dehumidifier 32, a filter 34, a secondary humidity sensor 36, and a path switching unit 12m Respectively.

An exhaust fan 38 is installed at the distal end of the upper channel 12k. The exhaust fan 38 functions to discharge the hot air flowing through the upper channel 12k to the atmosphere when the condition of the hot air flowing in the upper channel 12k becomes unsuitable for drying.

As shown in the drawing, the circulating induction fan 14 is mounted on the lower portion of the duct 12h on the upstream side. The circulation induction fan 14 sucks up hot air that has been in contact with the wood in the drying chamber 12b and guides the heated air to the upper channel 12k.

The dehumidifier (32) removes moisture in the hot air raised by the upper channel (12k). The moisture removed by the dehumidifier 32 is discharged to the outside through a separate drain line (not shown).

A filter (34) located downstream of the dehumidifier (32) removes dust and contaminants from hot air to improve the state of hot air. Since the hot air is purified by the filter 34, the environment inside the drying room 12 can always be kept clean.

The secondary humidity sensor 36 once again checks the humidity of the hot air passing through the filter 34. The information sensed by the secondary humidity sensor 36 is transmitted to the controller 24. The controller 24 determines whether the path switching unit 12m is operated based on the humidity information sensed by the secondary humidity sensor 36. [

The path switching unit 12m serves to open the vent hole 12n and shut off the passage toward the exhaust fan 38 or to block the vent hole 12n and open the passage to the exhaust fan 38. [ The vent hole 12n communicates with the drying chamber 12b as a through hole formed in the lower surface of the duct 12h.

The path switching unit 12m includes a switching shutter 12p rotatably installed on the side of the air vents 12n and an actuator 12q rotating the switching shutter 12p upward and downward. As long as the switching shutter 12p can be rotated, the kind of the actuator 12q can be changed as much as possible.

The switching shutter 12p is rotated downward to block the vent hole 12n and open the passage toward the exhaust fan 38. [ Further, the vent hole 12n is turned upward to shut off the passage toward the exhaust fan 38. [

3 is a view showing another embodiment of a cogeneration type wood drying apparatus 10 having a different heat source according to an embodiment of the present invention. 4 is a perspective view of the turning frame shown in Fig.

A center shaft 44 rotatably supported by a bearing 42 and rotatable about its axis; a rotary motor 46 for rotating the center shaft 44 about its axis; Is installed.

The rotation motor 46 is driven by the control of the controller 24 to rotate the center shaft 44 and is connected to the center shaft 44 via a chain 48. It is a matter of course that the rotational force of the rotary motor 46 is transmitted to the center shaft 44 through the chain 48.

A turning frame 40 is fixed to the upper portion of the center shaft 44. The turning frame 40 is fixed to the center shaft 44 and rotates like a turntable to support the wood w thereon.

As long as the wood can be supported and rotated, the structure of the turning frame can be variously modified and may take the form of Fig. 4

The turning frame 40 shown in Fig. 4 is formed by welding a plurality of support beams 40a to each other and has a substantially octagonal shape. The support beams 40a are welded to the upper and lower sides of the turning frame 40 so that air can be communicated up and down.

Reference numeral 41 denotes a release preventing projection. The release preventing protrusion 41 is a protrusion for preventing the wood loaded on the turning frame 40 from falling out of the turning frame 40.

In addition, the steam induction pipe 19 and the heat radiating portion 22 are disposed below the turning frame 40.

The heat and steam emitted by the steam induction pipe 19 and the heat dissipating unit 22 are piled up with the flow of air made through the blower 23 and are dried by contact with the wood through the rotating turning frame 40 . The hot air after drying is transferred to the upper channel 12k by the circulation induction fan 14 and circulates.

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, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10: Wood drying apparatus 12: Drying room 12a: Heating chamber
12b: drying chamber 12c: partition wall 12d: hot air passage
12e: bottom portion 12f: perforated plate 12g: through hole
12h: Duct 12k: Upper channel 12m: Path switching section
12n: Ventilation hole 12p switching shutter 12q: Actuator
12r: Support channel 14: Circulation induction fan 16: Steam boiler
18: superheated steam generator 19: steam induction pipe 19a: nozzle
20: Oil boiler 22: Heat dissipating part 23: Blower
24: controller 26: temperature sensor 28: humidity sensor
30: passage opening / closing part 30a: tension motor 30b:
30c: wire 30d: air volume adjusting door 30e: hinge
32: dehumidifier 34: filter 36: secondary humidity sensor
38: exhaust fan 40: turning frame 40a: supporting beam
41: separation preventing projection 42: bearing 44: center shaft
46: rotation motor 48: chain

Claims (5)

A drying chamber divided into a heating chamber and a drying chamber by a partition wall having a hot air passage and accommodating the wood to be dried in the drying chamber; A steam boiler installed in the heating chamber to generate steam to be applied to the wood; An oil boiler operating simultaneously with the steam boiler to generate heat for use with steam; A circulation induction fan circulating the steam and the heat inside the drying room so that steam and heat are repeatedly applied to the wood; And a controller for controlling the oil boiler and the steam boiler,
Inside the heating chamber; A superheated steam generator for superheating steam produced in the steam boiler; and a blower for leading the heat generated in the oil boiler to the drying chamber, wherein the drying chamber includes: A temperature sensor and a humidity sensor for sensing temperature and humidity inside the drying chamber and transmitting the detected temperature and humidity to the controller; And a tension motor connected to the air volume control door and extending in the longitudinal direction, and a tension motor controlled by the controller and adjusting the position of the door by tensioning the wire And,
The drying chamber includes a center shaft vertically supported by a bearing and rotatable about an axis, and a driving unit for rotating the center shaft. The upper portion of the center shaft is fixed to a center shaft, Shaped turning frame,
A lower portion of the turning frame; A steam induction pipe for receiving the superheated steam generated in the superheated steam generator into the interior of the turning frame and spraying the superheated steam upward by using a plurality of nozzles, And the blower supplies air to the lower space of the turning frame to cause the heat of the heat dissipating unit and the superheated steam ejected from the steam induction pipe to flow upward toward the wood A cogeneration type wood drying apparatus having a different heat source. The method according to claim 1,
On top of said drying room;
An upper channel having a vent hole opened to a drying chamber is installed on one side of the hot air used for drying the wood,
The upper channel includes a dehumidifier and a secondary humidity sensor connected to the controller,
An exhaust fan for discharging the hot air inside the upper channel to the atmosphere is provided at the downstream end of the upper channel,
A switching shutter is provided between the exhaust fan and the secondary humidity sensor for opening the ventilation hole to block the passage toward the exhaust fan or to open the passageway for venting the ventilation fan to the exhaust fan in accordance with the humidity of the hot air inside the upper channel Wherein the heat source is a cryogenic cryogenic drying apparatus having a different heat source. delete delete delete

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