JP2017132146A - Wood chip-drying container, and wood chip production system using the container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood chip-drying container capable of reducing the raw material cost of a wood chip, easily using the wood chip at not only a large-sized power plant but also the other places and further capable of effectively using the soil-attached root portion made to be not adequate to a power generation material heretofore, and to provide a production system for the wood chip using the drying container.SOLUTION: In a wood chip-drying container, a hot blast intake port 36 is connected inside a box-like container body 14A whose internal space is configured as a dry room, and a hot blast delivery device 30 is prepared in the container body 14A. The hot blast delivery device 30 is composed by building in plural pipes 32, on the peripheral surface of which many holes 34 are formed. The drying container is configured to put the nonessential part of a wood on fire, feed the heat generating thereby to the container 14, and dry the chip in the container 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wood chip drying container and a wood chip manufacturing system using the drying container.

  In order to convert wood into energy, primary business (forestry) such as tree planting, secondary business (processing / distribution business) that processes felled trees into chips, etc., and energy by burning chips in the plant It consists of a tertiary business (power generation industry) that takes out the power. By making these three businesses economically viable, it is possible to develop a power generation business using wood.

  By the way, crushed wood into chips generally has a high water content, so when using wood chips as fuel, wood chips are used until the secondary or tertiary operator falls below a predetermined moisture content. Need to be dried.

  On the other hand, in large power plants such as thermal power plants and biomass power plants that are tertiary operators, even if there is demand for wood chips, a small amount is used to dry the wood chips from the large combustion devices used there. It was considered difficult to take out and use the thermal energy, and in order for a large-scale tertiary company to dry the wood chips, it was necessary to provide a new drying facility for drying the wood chips.

  On the other hand, for primary businesses such as forestry, when supplying wood as a material for power generation, only the main part of wood with good combustion efficiency is taken out and the roots with soil are burned and discarded as they are Or compost was common.

  In addition, as primary and secondary operators do, the main part of timber is crushed with a timber crusher and processed into a large amount of timber chips, usually in the vicinity of the forest where the trees are felled. Generally, wood chips are transported by truck from the demand for wood chips to the destination for drying.

  Further, a box-shaped transport container is waiting at a processing site for processing wood chips, and a large amount of wood chips are accommodated in the transport container. Then, the transport container filled with wood chips is mounted on a truck and transported to the customer or drying destination by the truck, where the wood chips are unloaded and the transport container emptied is mounted on the truck again. Then, the process of sending it back to the work site where chips were made was repeated.

In such a work process, the wood chip must be loaded and unloaded many times before the wood chip is processed and further dried to obtain fuel, and the work is complicated. As a result, there is a problem that the raw material cost of the wood chip increases.
In addition, such a problem is a factor that prevents power generation business using wood chips as fuel.

  On the other hand, in Europe, as shown in FIG. 4, the bottom surface of the container body is a double bottom, and the upper bottom plate is composed of a porous plate 52 provided with a large number of holes 54. A wood chip drying container 50 that supplies hot air to the air and uniformly supplies hot air upward from the numerous holes 54 has been put into practical use. However, in this case, the container main body needs to be custom-made for this purpose, such as the heat supply mechanism of the perforated plate 52 and the strength of the side wall surface to which the load of the full load chip is applied.

  In view of such circumstances, the present invention can reduce the cost of raw materials for wood chips, and can be easily used in various places regardless of a large-scale power plant. A drying container that can effectively use a non-major part of wood, such as a root part with soil, which has been considered unsuitable as a material for chips, as a heat source for drying chips, and wood using this drying container The object is to provide a chip manufacturing system.

  In the present invention, a general-purpose container body can be used for drying by simple modification, and a wooden material such as a soiled root that has not been effectively used for power generation until now is effectively used as a heat source for drying wood chips. It is characterized by being able to do it.

That is, the container for drying wood chips according to the present invention,
A hot air intake port is connected to a box-shaped container body whose internal space is configured as a drying chamber, and a hot air delivery device is provided in the container body, and the hot air delivery device has a hole in its peripheral surface. A plurality of pipes each having a shape formed therein are incorporated.

  In the wood chip drying container having such a configuration, once the wood chip is received, the wood chip can be dried in the container body until it becomes suitable as a fuel as it is. This eliminates the need to load and unload the wood chips many times before drying them.

In the present invention, at least a humidity sensor and a temperature sensor are provided in the container body, and when the humidity in the container body becomes equal to or lower than the predetermined humidity, or the temperature in the container is It is preferable that the supply of hot air by the hot air sending device is stopped when detected by the humidity sensor or the temperature sensor when a predetermined temperature or higher is reached.
With such a configuration, it is possible to prevent the wood chips from drying more than necessary, and it is possible to prevent the occurrence of fire and the like due to overdrying.

Furthermore, in the present invention, it is preferable that the container main body is provided with a communication function and a GPS function so that the dry state and position information can be obtained remotely.
With such a configuration, the dry state can be monitored remotely, and a timely transportation plan for the dry chips to the customer can be made.

  Furthermore, in the wood chip manufacturing system according to the present invention, in the drying container according to any one of the above, the large amount of chips is stored in the container body, and a large amount of the chips stored in the container body. The wood chip is dried by hot air supplied into the container body from the residual material combustion apparatus.

  According to the wood chip manufacturing system having such a configuration, the wood chip, which has not been effectively used so far, is not simply incinerated and discarded, but is used as a heat source for drying the wood chip. The drying of chips and the disposal of non-major parts of wood can be performed at the same time, which can contribute to the reduction of manufacturing costs of dry wood chips.

Furthermore, in this invention, parts other than the main part of the timber supplied to the said remaining material combustion apparatus may contain either a root with a soil, a twig, and a leaf.
With such a configuration, it is possible to effectively use the trees that have been cut down.

  Furthermore, in the present invention, a heat storage device is connected to the residual material combustion device, and when the humidity in the container body becomes a predetermined humidity or lower, or the temperature in the container body becomes a predetermined temperature or higher. In this case, it is preferable that the heat of hot air supplied from the residual material combustion device to the drying container is stored in the heat storage device.

Furthermore, in the present invention, a waste heat power generation device is connected to the residual material combustion device or to the heat storage tank, and when the waste heat of the residual material combustion device becomes excessive, or the temperature in the container body is When the temperature becomes equal to or higher than a predetermined temperature, the heat of the hot air supplied from the residual material combustion device to the drying container is supplied from the heat storage device to the waste heat power generation device, thereby enabling power generation.
According to such a wood chip manufacturing system, the surplus obtained from the remaining material combustion device can be sold to other businesses.

  According to the wood chip drying container according to the present invention, a hot air sending device in which a plurality of pipes having holes formed in the peripheral surface are incorporated in the container main body containing the wood chips is provided in advance. The fully loaded wood chips can be directly dried in the container body without being transferred from the drying container to another location. Therefore, since the wasteful work of loading and unloading the wood chips is not required until the wood chips are dried, it contributes to the cost reduction of the wood chips.

  Furthermore, according to the wood chip manufacturing system according to the present invention, rather than simply burning and discarding non-major parts of wood such as soiled root parts that have not been effectively used so far, Since the wood chips are effectively used as a heat source for drying the wood chips, the drying of the wood chips and the disposal of the non-major part of the wood can be performed at the same time.

FIG. 1 is a schematic view of a wood chip manufacturing system according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of a drying container with a hot-air delivery device employed in the wood chip manufacturing system shown in FIG. FIG. 3 is a schematic diagram for explaining the operation of the hot air delivery device shown in FIG. FIG. 4 is a schematic view of a conventional drying container.

Hereinafter, preferred embodiments (examples) of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of a wood chip manufacturing system 10 according to an embodiment of the present invention, and FIG. 2 shows a drying container equipped with a hot air delivery device 30.

  As shown in FIG. 1, in the wood chip manufacturing system 10 according to an embodiment of the present invention, a main portion 4 of a tree 2 cut in a forest is processed into a log shape. And these main parts 4 are fragmented by the wood crushing device 6. The wood chips 8 cut into pieces by the wood crushing device 6 are directly stored from the wood crushing device 6 or once in the vicinity and then indirectly stored in the drying container 14. The drying container 14 is preferably placed in the vicinity of a residual material combustion device 22 to be described later.

  The drying container 14 is, for example, a steel box lined with a heat insulating member. The upper surface opening 14B of the container body 14A is configured to be openable and closable, and the opening 14B is covered with a lid 14C as necessary. Has been made possible.

  Such a drying container 14 corresponds to the transport container described above. However, unlike the conventional transport container, the drying container 14 includes a hot air delivery device 30 in the container main body 14A, and the hot air delivery device 30 provides a large amount of wood chips 8. It is possible to dry directly.

The drying container 14 can be transported by being mounted on a truck bed, for example, in the same manner as a known transport container.
On the other hand, among the trees 2 cut from the forest, the parts other than the main part of the timber are separated into other places and accommodated in one place.

These parts other than the main part of the wood are, for example, a root 16 with soil, a twig 18, a leaf 20 and the like, and these are collectively referred to as a remaining material or a non-main part.
These remaining materials are supplied to a known remaining material combustion device 22 and used as a heat source by the remaining material combustion device 22. The remaining material combustion apparatus 22 can burn the remaining material without using any other fuel.

  In the present embodiment, it is possible to connect such a remaining material combustion device 22 and the drying container 14 by a bellows-like pipe line having heat insulation properties, and when both are connected by a pipe line. The heat generated by the remaining material combustion device 22 is supplied into the container main body 14A, and a large amount of the wood chips 8 stored in the container main body 14A are dried by the heat.

Hereinafter, the drying container 14 which is a main part of the present embodiment will be described.
The drying container 14 has a hot air intake 36 connected to the side surface of the box-shaped container main body 14A.

Furthermore, as shown in FIG. 2, a hot air delivery device 30 is provided inside the container main body 14A.
The hot air delivery device 30 has a simple configuration in which a plurality of pipes 32 are incorporated in a lattice shape or a cross-beam shape, and the way of assembling the pipes 32 is not particularly limited. However, the pipe 32 needs to be provided with a sufficient space so as not to hinder the insertion of the wood chip 8 from the opening 14B and the discharge from the opening 14B. In addition, a pipe can be welded to the wall of the container so that it can also be used as a structural member, and even a general-purpose container that is not supposed to be loaded with a full chip can be used easily. A large number of holes 34 are formed in advance on the peripheral surface of the pipe 32 arranged in this manner. In the hot air delivery device 30 of the present embodiment, a large number of holes 34 are formed in the pipe 32, so that the hot air taken into the container main body 14A from the hot air inlet 36 as shown in FIG. 14A can be distributed and sent out.

  In the present embodiment, the number of holes 34 formed in the pipe 32, the diameter of the holes 34, the density of the holes 34, and the like are not particularly limited. In particular, in the vicinity of the end portion of the pipe 32, the diameter of the hole 34 can be increased, or the number of the holes 34 can be increased. Moreover, it is preferable that the end portion of the pipe 32 is closed by covering it with a cleaning cap.

As described above, the hot air delivery device 30 according to the present embodiment has a simple basic configuration, so that a failure or the like hardly occurs, and manufacturing and maintenance costs can be suppressed at a low cost.
Moreover, it is preferable that a humidity sensor and a temperature sensor are provided in the container main body 14A which becomes a drying chamber when hot air is supplied. These sensors are not limited to one place, and may be provided at a plurality of places.

  As described above, if the humidity sensor and the temperature sensor are provided at a plurality of locations in the container main body 14A, the overall humidity in the container main body 14A has become equal to or lower than the set humidity, or the entire inside of the container main body 14A. It is possible to detect that the temperature of the air has become equal to or higher than the set temperature by a humidity sensor or a temperature sensor, and it is possible to stop the hot air intake from the hot air intake 36 at the time of detection.

By such setting, it is possible to prevent the wood chip 8 from being dried more than necessary, and to contribute to the prevention of fire.
On the other hand, in the present embodiment, it is preferable that the remaining material combustion device 22 includes a heat storage device 40, a waste heat power generation device 42, and a waste heat power generation device 42.

  If the remaining material combustion device 22 includes the heat storage device 40, the amount of heat generated in the remaining material combustion device 22 when the heat supply from the remaining material combustion device 22 to the drying container 14 is stopped is stored in the heat storage device 40. Can store heat. The amount of heat stored in the heat storage device 40 can be supplied for power sale using the waste heat power generation device 42.

The operation of the wood chip manufacturing system 10 according to the present invention will be described below.
First, the tree 2 is cut from the forest. The main part 4 of the felled tree 2 is made into a log shape, for example, and crushed into a large number of chips 8 by a wood crushing device 6. Here, it is preferable that an empty drying container 14 is in the vicinity of the wood crushing device 6. Thus, if the empty drying container 14 is on standby near the wood crushing device 6, a large amount of wood chips 8 crushed by the wood crushing device 6 can be stored in the container main body 14 </ b> A without being temporarily stored. Can be put directly into.

  On the other hand, among the trees 2 cut from the forest, the non-main parts to which the main parts 4 are separated, that is, the roots 16 with the soil, the twigs 18, the leaves 20 and the like are supplied to the remaining material combustion device 22, The remaining material combustion device 22 combusts. The heat generated in the remaining material combustion device 22 is supplied as hot air into the container body 14A from the hot air intake 36 of the drying container 14.

  Thereby, a large amount of the wood chips 8 accommodated in the drying container 14 are dried by the supplied hot air. In addition, since many holes 34 are formed in the pipe 32 in the container main body 14A, hot air is supplied at any position in the container main body 14A, and thus the entire wood chip is substantially uniform. Can be dried.

  Then, when each sensor detects that a certain part in the container main body 14A is lower than a predetermined humidity or higher than a predetermined temperature, the supply of hot air by the remaining material combustion device 22 is stopped. Thereafter, the drying of the wood chip 8 in the container body 14A is completed. On the other hand, the heat generated in the remaining material combustion device 22 is thereafter supplied to the heat storage device 40 instead of the drying container 14. The heat stored in the heat storage device 40 is supplied to the waste heat power generation device 42 as necessary.

  When the drying of the wood chip 8 in the drying container 14 is completed, if the drying container 14 is delivered to the consumer, the consumer uses the dried wood chip 8 as it is, for example, using the dried chip. It can be used for biomass power generation using small hot water boilers and wood chips.

  Furthermore, if the container main body 14A is equipped with a communication function and a GPS function so that the dry state and position information can be obtained remotely, the dry state can be monitored remotely, and the timely transportation plan of the dry chips to the customers Is possible.

According to the wood chip manufacturing system 10 configured in this embodiment, the dried wood chip 8 is supplied as a heat source material that can be used immediately in a large-scale power plant such as a thermal power plant or a woody biomass power plant. Can do. Furthermore, if it supplies to an agricultural house, a warm bath facility, etc. which are a comparatively small amount of heat users, those operators can use the wood chips 8 as they are without drying them.
Thus, according to the present Example, the base of the electric power generation business using wood can be expanded, and it can contribute to the cost reduction of a primary enterprise, a secondary enterprise, and a tertiary enterprise.

2 Tree 4 Main part of wood 6 Wood crusher 8 Wood chip 10 Wood chip production system 14 Drying container 14A Container body 16 Root with soil 18 Twig 20 Leaf 22 Remaining material combustion device 30 Hot air delivery device 32 Pipe 34 Hole 36 Hot air intake 40 Heat storage device 42 Waste heat power generation device

Claims (7)

  A hot air intake port is connected to a box-shaped container body whose internal space is configured as a drying chamber, and a hot air delivery device is provided in the container body, and the hot air delivery device has a hole in its peripheral surface. A container for drying wood chips, characterized in that a plurality of pipes each having a shape formed therein are incorporated.   The container body is provided with at least a humidity sensor and a temperature sensor, and when the humidity in the container body becomes equal to or lower than the predetermined humidity, or the temperature in the container becomes equal to or higher than the predetermined temperature. 2. The wood chip drying container according to claim 1, which is detected by the humidity sensor or the temperature sensor and the supply of hot air by the hot air delivery device is stopped.   The container for drying according to claim 1 or 2, wherein the container main body is provided with a communication function and a GPS function, and a dry state and position information can be obtained remotely.   The wood chip drying container according to any one of claims 1 to 3, further comprising a remaining material combustion device for burning a part other than a main part of the wood cut from the forest, wherein a large amount of the wood chip is the container. A wood chip manufacturing system characterized in that a large amount of chips stored in the body and dried in the container body are dried by hot air supplied from the remaining material combustion device into the container body. .   5. The wood chip manufacturing system according to claim 4, wherein a portion other than a main portion of the wood supplied to the remaining material combustion apparatus includes a root, a twig, or a leaf with soil.   A heat storage device is connected to the remaining material combustion device, and when the humidity in the container body becomes a predetermined humidity or lower, or when the temperature in the container body becomes a predetermined temperature or higher, The wood chip manufacturing system according to claim 4 or 5, wherein heat of hot air supplied from the material combustion device to the drying container is stored in the heat storage device.   A waste heat power generator is connected to the residual material combustion device, and when the waste heat of the residual material combustion device becomes excessive, or when the temperature in the container body becomes a predetermined temperature or higher, The heat of hot air supplied from the material combustion device to the drying container is supplied from the heat storage device to the waste heat power generation device to enable power generation. Wood chip manufacturing system.

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