Coal production furnace, and coal production method

Abstract

To provide a coal production furnace with reduced smoke.SOLUTION: There is provided a coal production furnace 100 according to the present invention, i.e., a coal production furnace 100 comprising a heating space 640, a secondary combustion space 650 formed in the upper part of the heating space 640, a placement table 300 provided with a ventilation hole 310 for a raw material 700 to be placed thereon in the upper part of the secondary combustion space 650, and a cover member 200 disposed on the upper part of the placement table 300 to cover the upper part of the raw material 700 placed on the placement table 300.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a charcoal making furnace and a charcoal making method. [Background technology]

[0002] In recent years, landslides and typhoons have caused dams to become completely covered in driftwood, which has become an environmental problem. Driftwood affects the discharge function of dams. It is said that approximately 600,000 tons of driftwood is removed from dams throughout Japan each year. The labor costs and costs involved in disposing of this 600,000 tons of driftwood have become an environmental problem.

[0003] Furthermore, waste wood and forest residues are generated when forest resources are harvested. Forest residues are left behind in forest areas, such as branches, leaves, and tree tips that are generated when cutting standing trees into logs, and thinning materials that are not transported outside the forest.

[0004] The size of the leftover materials varies, making it difficult to use them as building materials. Even if specialists were to process some of the leftover materials, the amount of leftover materials remaining would not be reduced significantly. Patent Document 1 discloses a charcoal making device for making charcoal from waste materials. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7152098 Summary of the Invention [Problem to be solved by the invention]

[0006] The conventional charcoal making apparatus disclosed in Patent Document 1 has a problem in that it requires a secondary combustion furnace to combustible gases generated during the thermal decomposition of raw materials.

[0007] The present invention has been made in consideration of the above circumstances, and aims to reduce soot and smoke by performing secondary combustion of combustible gases in a charcoal making furnace. [Means for solving the problem]

[0008] The charcoal making furnace 100 of the present invention includes a heating space 640, a secondary combustion space 650 formed above the heating space 640, and a loading table 300 on which raw materials 700 are placed above the secondary combustion space 650. In a charcoal making furnace 100 equipped with The mounting table 300 is provided with a ventilation hole 310, A cover member 200 is provided on the top of the table 300 to cover the top of the raw material 700 placed on the table 300. [Effects of the Invention]

[0009] According to the charcoal making furnace 100 of one embodiment of the present invention, secondary combustion occurs in the upper part of the heating space 640, making it possible to reduce soot without the need for a secondary combustion furnace. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing the concept of a charcoal making furnace 100 according to an embodiment of the present invention. [Figure 2] 1 is a flowchart showing a charcoal production process using a charcoal production furnace 100 according to an embodiment of the present invention. [Figure 3] 1 is a schematic cross-sectional view of a charcoal making furnace 100 according to an embodiment of the present invention. [Figure 4] 1A and 1B are diagrams illustrating a covering member 200 according to an embodiment of the present invention. [Figure 5] 1 is a diagram showing a mounting table 300 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0012] Fig. 1 is a schematic diagram showing an example of a charcoal making furnace 100 according to an embodiment of the present invention. Fig. 2 is a flowchart showing an example of a charcoal making process in the charcoal making furnace 100 according to an embodiment of the present invention.

[0013] The principle of this embodiment will be described with reference to Fig. 1. In this embodiment, a heating space 640 and a secondary combustion space 650 are provided above the heating space 640. A mounting table 300 is provided above the secondary combustion space 650, and raw material 700, which is heated to become charcoal, is placed above the mounting table 300.

[0014] A heating means is provided in the heating space 640. The heating means is provided to heat the raw material 700 placed on the mounting table 300 using heat generated by the heating means. The heating means may be firewood or charcoal, or may be a gas burner or electric heater. The heating means may be selected as appropriate as long as it generates flammable gas from the raw material 700 when heated and causes secondary combustion in the upper part of the heating space 640. It is desirable to select a heating means that can cause secondary combustion of the raw material 700 placed on the mounting table 300 in a short period of time.

[0015] A mounting table 300 is provided above the secondary combustion space 650. The mounting table 300 is used to mount raw material 700 to be turned into charcoal. The mounting table 300 also has the function of venting flammable gas generated when the raw material 700 mounted on the mounting table 300 is heated by a heating means into the secondary combustion chamber.

[0016] The mounting table 300 may be in the form of a mesh or a flat plate with a plurality of holes. The form of the mounting table 300 can be appropriately selected depending on the relationship between the material, size, or amount of the raw material 700 to be mounted on the mounting table 300 and the heating capacity or heating method of the heating means.

[0017] A covering member 200 is placed on the top of the mounting table 300. The covering member 200 is provided so as to cover the raw material 700 placed on the mounting table 300 together with the mounting table 300. The covering member 200 may be box-shaped, such as a rectangular parallelepiped, with no bottom surface.

[0018] The covering member 200 is placed so as to cover the raw materials 700, and is heated in this state by the heating means, so that the raw materials 700 are heated in a state similar to steaming. As the raw materials 700 are heated, combustible gases are generated, and the generated combustible gases are vented into the secondary combustion space 650 through the opening surface 220, which is the uncovered surface of the covering member 200, and secondary combustion takes place in the secondary combustion space 650.

[0019] FIG. 2 is a flowchart showing the charcoal production method according to this embodiment. In S110, the raw material 700 is placed on the placement table 300. The raw material 700 may be wood such as oak, sawtooth oak, chestnut oak, or phillyraeoches, or may be bamboo.

[0020] The raw materials 700 may be placed in a line on the placing table 300, or may be placed so as to be stacked on the placing table 300. The amount and method of placing the raw materials 700 can be appropriately selected in relation to the heating capacity of the heating means.

[0021] In S120, the cover member 200 is placed so as to cover the raw material 700.

[0022] It is preferable to prepare a plurality of covering members 200 with different heights. The covering member 200 with an appropriate height can be selected depending on the amount of raw material 700 to cover the raw material 700.

[0023] In S130, heating in the heating space 640 is started. Here, an example is shown in which the heating space 640 is heated by burning firewood or charcoal. The temperature of the heating space 640 rises by burning firewood or charcoal. Note that the heating space 640 can be heated not only by burning firewood or charcoal, but also by a gas burner or an electric stove.

[0024] In S140, the raw material 700 placed on the mounting table 300 is heated. The temperature to which the raw material 700 is heated is selected as appropriate depending on the material and shape of the raw material 700. The raw material 700 is preferably heated to a temperature between 350°C and 500°C. The temperature in the heating space 640 and secondary combustion space 650 by the heating means and secondary combustion is preferably higher than 600°C. By setting the temperature at 600°C or higher, the generation of dioxins can be reduced. Furthermore, by setting the temperature in the heating space 640 and secondary combustion space 650 to a temperature higher than 600°C, dioxins can be combusted.

[0025] In S150, the raw material 700 is heated to generate combustible gases such as methane, ethane, and propane. The raw material 700 is also carbonized as it is heated. The raw material 700 placed on the mounting table 300 is covered by the cover member 200, creating an oxygen-low state. Therefore, the generated combustible gases and the carbonized raw material 700 are not combusted. The generated combustion gases are then ventilated through the mounting table 300 into the secondary combustion space 650 below the mounting table 300.

[0026] In S160, the combustible gas generated in S150 undergoes secondary combustion, and the heat generated by the secondary combustion can further heat the raw material 700 placed on the mounting table 300. Furthermore, secondary combustion of the lower part of the mounting table 300 burns oxygen, preventing oxygen from passing into the inside of the covering member 200. Note that secondary combustion can also occur inside the covering member 200. When the heating means is firewood or charcoal, the combustible gas generated from the firewood or charcoal of the heating means undergoes secondary combustion in the secondary combustion space 650.

[0027] In S170, it is determined whether all of the raw material 700 has been carbonized. Here, "all of the raw material 700" may literally mean 100%, or the degree of carbonization may be determined depending on the use of the generated charcoal, and the completion of carbonization may be determined based on that degree. The completion of carbonization may be determined based on a predetermined time period in relation to the heating means and the amount of raw material 700. Alternatively, the temperatures of the heating space 640 and the secondary combustion space 650 may be detected, and the completion of carbonization may be determined based on changes in these temperatures. Alternatively, the completion of carbonization may be determined based on changes in the components of the exhaust gas from the charcoal making furnace 100.

[0028] FIG. 3 is a schematic cross-sectional view of a charcoal making furnace 100 according to this embodiment. Raw material 700 is placed on the upper surface of the mounting table 300. A covering member 200 is arranged to cover the raw material 700. The covering member 200 covers the raw material 700, thereby forming a carbonization space 800. An upper housing 400 is arranged to further cover the covering member 200. A separation space 810 is formed between the upper housing 400 and the covering member 200.

[0029] In order to carbonize raw material 700, it is necessary to heat raw material 700 and raise its temperature. At this time, isolated space 810 functions as a heat insulating layer and can prevent heat from escaping from upper housing 400. Furthermore, by forming isolated space 810 from upper housing 400, an increase in the temperature of upper housing 400 can be prevented and the temperature can be kept at approximately 100 degrees, which is low enough that a person will not get seriously burned if they touch it.

[0030] A secondary combustion space 650 is formed below the mounting table 300. The secondary combustion space 650 is a space where flammable gas generated by heating the raw material 700 is burned. A heating space 640 is formed below the secondary combustion space 650. The heating space 640 is a space where heat is generated using firewood, charcoal, a gas burner, or an electric stove.

[0031] The secondary combustion space 650 and the heating space 640 are formed in a lower housing 600 provided below the mounting table 300. The lower housing 600 is provided with an air inlet 610 for burning firewood or charcoal, and an exhaust port 620 for exhausting gas generated in the charcoal making furnace 100. It is preferable to provide a chimney 660 at the exhaust port 620.

[0032] FIG. 4 shows an example of a cover member 200 for the charcoal making furnace 100 according to this embodiment. 4(a) and 4(b) show examples in which the covering member 200 is a rectangular parallelepiped. The underside of the covering member 200 is the opening surface 220. The height h1 of the covering member 200 in FIG. 4(a) is higher than the height h2 of the covering member 200 in FIG. 4(b). A covering member 200 with an appropriate height can be selected depending on the amount and size of the raw material 700 to be placed on the mounting table 300. Furthermore, the covering member 200 is not limited to the rectangular parallelepiped shown in FIG. 4(a) and 4(b), and may have a circular underside as shown in FIG. 4(c), or may be entirely hemispherical.

[0033] FIG. 5 shows an example of the mounting table 300 of the charcoal making furnace 100 according to this embodiment. The mounting table 300 may be ladder-shaped as shown in FIG. 5(a) or mesh-shaped as shown in FIG. 5(b). Alternatively, a flat mounting table 300 with multiple small holes may be provided as shown in FIG. 5(c). If the raw material 700 is small, such as sawdust, it is preferable to select a mounting table 300 such as that shown in FIG. 5(c). The mounting table 300 can be appropriately selected depending on the size of the raw material 700, so that the raw material 700 is heated by secondary combustion and the flammable gas generated by the heating flows into the secondary combustion chamber through the holes.

[0034] 100... charcoal making furnace, 200... covering member, 220... opening surface, 300... placing table 310...ventilation hole, 400...upper housing, 600...lower housing, 610...air intake port, 620...air exhaust port 640...heating space, 650...secondary combustion space, 660...chimney, 700...raw material 800…Carbonized space, 810…Isolated space

Claims

1. a heating space, a secondary combustion space formed above the heating space, and a loading table on which a raw material is loaded above the secondary combustion space; In a charcoal making furnace equipped with The mounting table is provided with a ventilation hole, A covering member is provided on the upper part of the loading table to cover the upper part of the raw material placed on the loading table. Coal making furnace.

2. an upper housing that further covers the cover member; a lower housing that defines the heating space and the combustion space; Equipped with 2. The charcoal making furnace according to claim 1.

3. an air intake port and an air exhaust port in the lower housing; Equipped with Charcoal making furnace according to claim 2.

4. The heating space is a space where heating is performed at the top by combustion.

2. The charcoal making furnace according to claim 1.

5. The secondary combustion space is a space in which combustion gas generated when an object placed on the mounting table is heated is burned. The combustion furnace according to claim 1.

6. A charcoal making method using a charcoal making furnace including a heating space, a table on which raw materials are placed above the heating space, and a cover member on top of the table, The raw material is heated between the heating space and the mounting table, and a flammable gas generated by the heating of the raw material undergoes secondary combustion, thereby heating the raw material placed on the mounting table. Charcoal making method.

7. In the heating space, the raw material is heated by combustion. The charcoal production method according to claim 6.

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