JPH048799A - Bamboo charcoal for fuel - Google Patents

Abstract

PURPOSE:To obtain a readily combustible bamboo charcoal having good design, strong caloric force and calculable combustion time, and capable of readily dealing, by inserting plural bamboo charcoals having small outer diameter into a hollow part of bamboo charcoals having openings in the vertical direction and large outer diameter. CONSTITUTION:Raw bamboos are dehydrated, further burnt, naturally carbonized for 20-60 hours and rapidly burnt by increasing a feeding amount of air. The bamboos are retained in a red-hot state at 1,000 deg.C for 10-30 hours, naturally extinguished by shielding air and cooled to give cylindrical bamboo charcoals. The bamboo charcoals are uniformly cut in 4-10cm height, a bamboo charcoal 1A having large outer diameter is stood and several bamboo charcoals 1B having small outer diameter are inserted into a hollow part 2 of the large outer diameter-bamboo charcoal to assembly bamboo charcoals.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to bamboo charcoal for fuel, which is made of bamboo charcoal having a thin wall and a large hollow part, which can be used as a fuel.

(Prior Art) Generally, charcoal is produced by packing wood cut to a predetermined length into a charcoal pot, and heating the inside of the pot by burning smoking material. Once spontaneous carbonization begins, carbonization progresses even without the supply of smoking wood, and carbonization is completed in about two days.Finally, the amount of air supplied is increased and the temperature is rapidly raised to about 1000℃ to reach a red-hot state. The charcoal is then cooled and taken out of the kettle to produce charcoal.

This charcoal is made from a solid round stick of wood that becomes the charcoal material.
When made into charcoal, the yield rate is about 30% at most.

However, when bamboo is used as a charcoal material, the wall thickness is thin and there is a large hollow part inside, so if the temperature is continuously raised as in the production of conventional charcoal, the shrinkage rate of bamboo will be 30 to 5.
Since it reaches 0%, there is a problem that it may crack or become twisted.

For this reason, the present inventors developed a method for producing bamboo charcoal (Japanese Patent Application No. 1-88442) that prevents cracking and twisting. As a result, it became possible to use bamboo charcoal to make crafts such as flower vases and delicacy containers.

However, bamboo charcoal has a thin wall (with a thick hollow part inside), so it is difficult to ignite, and even if it is heated with a burner and ignited, it will disappear after a while when the burner is turned off, and it will not burn like block-shaped charcoal. There was a problem with self-combustion.

When we investigated the cause of this, we found that even if one end of the cylindrical bamboo charcoal is ignited with a gas burner, the volume of the high-temperature combustion part is small due to the thin wall thickness, and the large hollow area allows the inner and outer surfaces to contact the outside air. This is thought to be due to the inability to maintain the required combustion temperature due to the high cooling rate.

Bamboo grows wild in many parts of Japan and has a high reproductive capacity, especially bamboos such as moso bamboo, which can grow up to several tens of meters in a year, causing bamboo thickets to spread, making it difficult to find countermeasures.

In addition, the amount of bamboo used in bamboo crafts is extremely small and has almost no value, so bamboo bushes are left unattended, and because they have a high reproductive capacity, they cannot be thinned sufficiently and become dense and thick (unable to grow). There was also the problem that they rubbed against each other and caused damage.

(Problems to be Solved by the Invention) As a result of various research conducted in view of the above, the present invention has been developed by producing bamboo charcoal using bamboo, which has not been used as a resource in the past, and by combining these to produce bamboo charcoal. Bamboo charcoal for fuel has been developed, which can be used as a fuel by taking advantage of its properties.

(Means for Solving the Problems) The present invention provides bamboo charcoal for fuel, characterized in that a plurality of pieces of bamboo charcoal having a small outer diameter are inserted into a hollow part of the bamboo charcoal having a large outer diameter and opening in the vertical direction. This is the first summary.

Furthermore, the present invention provides bamboo charcoal for fuel, characterized in that a plurality of pieces of bamboo charcoal with a small outer diameter are inserted into a hollow part of the bamboo charcoal with a large outer diameter and opened in the vertical direction, and the bamboo charcoal is housed in a case-shaped wire mesh. This is the second gist.

(effect) Next, the operation of the present invention will be explained.

When the end of bamboo charcoal for fuel is ignited, it burns and becomes red hot.

The outer bamboo charcoal has a large outer diameter, and the bamboo charcoal inserted into the hollow part has a smaller outer diameter and thinner wall thickness, so it burns more easily than the outer bamboo charcoal. Furthermore, since the inner bamboo charcoal receives combustion heat from the adjacent bamboo charcoal and is in a high-temperature atmosphere, the required combustion temperature is maintained and combustion progresses.

In addition, the outer surface of the outer bamboo charcoal with a larger outer diameter is in contact with the outside air, but the hollow inner surface is heated by the burning bamboo charcoal with a smaller outer diameter, so it is heated to the required combustion temperature, and it is strongly heated upward. It burns with firepower.

Furthermore, the bamboo charcoal on the outside is cylindrical, and the bamboo charcoal inserted inside is also cylindrical, so a plurality of chimneys are formed inside. As a result, the heat of combustion increases and the chimney effect is promoted, and the combustion part advances upward, and the combustion flame is also surrounded by bamboo charcoal on the outside, so it can be used outdoors even in strong winds.

Furthermore, by selecting the material, outer diameter, and number of bamboo charcoal and adjusting the air passage area, the combustion temperature and combustion time can be arbitrarily set.

Furthermore, it is easier to ignite fuel bamboo charcoal whose ends are coated with or impregnated with an ignition agent.

In addition, since bamboo charcoal is made of vertical fibers, the ash that it burns becomes a continuous cotton-like structure in the vertical direction, which makes it difficult to break down.When stored in a wire mesh, the ash does not fall and can be easily disposed of, making it ideal for indoor use. You can enjoy charcoal grilled food at your table.

(Example) Next, the present invention will be explained in detail.

First, when producing bamboo charcoal, raw bamboo is cut into predetermined lengths along the knots and packed into a charcoal kettle in its cylindrical shape. At this time, smoking materials such as wood and branches are packed in the front, back, and above the raw bamboo placed in the charcoal grill.

In this state, the chimney is closed, smoking material is poured in through the chimney, and it is ignited to heat the inside of the charcoal grill. When the temperature falls above 100°C and below the spontaneous carbonization temperature of bamboo, the chimney is opened and heated for 30 to 80 hours to slowly remove moisture from the raw bamboo and tighten the raw bamboo to prevent cracking.

After removing the moisture from the raw bamboo in this way, smoking material is added and fired in the oven, and once the bamboo is heated to a temperature higher than the spontaneous carbonization temperature and spontaneous carbonization begins, no smoking material is added.

Spontaneous carbonization of bamboo takes about 20 to 60 hours, and carbonization progresses from the top to the bottom.

Once the carbonization of the bamboo is complete, the amount of air supplied is increased and the bamboo is rapidly combusted, raising the temperature to about 1000 degrees Celsius, making it red-hot. If the bamboo is kept in this red-hot state for about 10 to 30 hours, the hardness of the bamboo will increase.

After this, the air vents and chimney are closed to cut off the air and allow the fire to extinguish naturally. When it cools down, it is removed from the charcoal kiln to yield cylindrical bamboo charcoal without cracks or deformation.

Bamboo charcoal produced in this way is cut into pieces with a height of 4 to 10 cm, as shown in Fig.
Stand up the bamboo charcoal IB with a small outer diameter in the hollow part 2 inside.
Insert and assemble several...

For example, as shown in FIG. 2, four pieces of bamboo charcoal for fuel constructed in this manner are stored in a case-shaped wire mesh 3 and shipped as one set.

When used, the fuel bamboo charcoal 1 is placed on a gas stove (not shown) and heated for 1 to 2 minutes with a gas flame, so that the lower end of the bamboo charcoal 1 burns and becomes red hot.

After igniting in this way, for example, the stove 4 shown in Fig.
This stove 4 has a hemispherical combustion chamber 5 formed inside the upper part, and air holes 6 are opened laterally in the lower part of the combustion chamber 5.

When transferred to the combustion chamber 5 of this stove 4, the combustion part 7 ignited at the lower end burns upward while self-combusting, and continues to burn at a high temperature for about 30 to 90 minutes.
You can have yakitori or barbecue on top.

To explain this combustion process in more detail, as shown in Fig. 4, when the lower end of the bamboo charcoal 1 for fuel is ignited, the outer diameter of the bamboo charcoal IB is smaller than that of the bamboo charcoal IA, so the wall thickness of the bamboo charcoal IB is also smaller than that of the bamboo charcoal IA.
Thinner than A (easier to burn), and since the inner bamboo charcoal IB receives combustion heat from the inner surface of the adjacent bamboo charcoal IB and bamboo charcoal IA with a larger outer diameter and is in a high temperature atmosphere, it is maintained at the required combustion temperature and combusts. is progressing.

In addition, the outer surface of the bamboo charcoal IA, which has a large outer diameter, is in contact with the outside air, but the inner surface on the hollow part 2 side is mutually heated by the burning bamboo charcoal IB, so it is heated to the required combustion temperature and burns upward. go.

Furthermore, the bamboo charcoal IA with a larger outer diameter has a cylindrical shape, and the bamboo charcoal IB inserted inside this charcoal IB is also cylindrical, so multiple chimneys are formed inside, and the combustion heat increases, creating a chimney effect. This is accelerated, and the combustion section 7 advances upward.

In this case, if the distance between the bamboo charcoal IA and the adjacent bamboo charcoal IB is at least 30v, the mutual heating effect will be small (this will make it difficult for combustion to proceed, and this may be the reason why combustion does not proceed with one bamboo charcoal IA). It's the same.

As the combustion section 7 advances upward, the inner bamboo charcoal IB burns slightly ahead of the outer bamboo charcoal IA, as shown in Fig. 5, and the lower part becomes ash 8 and sinks. come. Therefore, since the combustion flame 9 is also surrounded by the outer bamboo charcoal IA, it can be used outdoors even in strong winds.

As the combustion progresses further, the inner bamboo charcoal IB and
By the time ... completes combustion, a small amount of the outer bamboo charcoal 1A remains, and from this state, the outer bamboo charcoal IA has been sufficiently heated, so the fuel bamboo charcoal 1 is completely burned and becomes ash 8. Become.

In this case, if the number of bamboo charcoal IB...
Sometimes A remains without being completely combusted. Also, if you insert a lot of thin bamboo charcoal IB and make the air passage area too small, the chimney effect will be reduced, making combustion slow and the firepower weak.

Therefore, by adjusting the material and outer diameter of the bamboo charcoals IA and IB and selecting the air passage area, the combustion temperature and combustion time can be arbitrarily adjusted.

In addition, bamboo charcoal IA and IB do not crackle during combustion and do not have any odor, so they are suitable for grilling food such as yakitori or barbecue while sitting around a table.Furthermore, bamboo charcoal l for fuel has an excellent design and a charcoal grill. You can enjoy the warm atmosphere unique to grilling at home, inns, and restaurants.

In addition, since the bamboo charcoal IA and IB are made of fibers in the vertical direction, the burned ash 8 becomes a continuous cotton-like structure in the vertical direction and does not easily crumble, so it does not fall from the wire mesh 3 and the ash 8 can be easily disposed of. be.

On the other hand, with traditional charcoal grills that use charcoal, it is troublesome to ignite the charcoal, and it is difficult to obtain firepower unless a certain amount is burned, and the burning time cannot be adjusted, making it difficult to extinguish the fire and dispose of the remaining fine ash. It's a hassle. On the other hand, the amount of bamboo charcoal used for fuel according to the present invention is small, so it can be cooked on a small stove placed on a table.1 It generates little gas, and the combustion time can be calculated, so it can be enjoyed indoors while surrounding a charcoal fire. .

Further, in the above embodiment, the bamboo charcoal 1 for fuel, which is ignited on a gas stove, may be made of W4, the ends of which are coated or impregnated with an ignition agent such as thermite.

FIG. 7 shows another embodiment of the present invention, in which a mat lO impregnated with an ignition agent is adhered to the top of a plurality of fuel bamboo charcoals 1 arranged side by side.

This is because each fuel bamboo charcoal 1 does not fall apart because it is glued to the mat 10.When packing, store it in a box in the opposite direction as shown in the illustration, and when using it, turn it upside down and place it in a wire mesh 3. and ignite the mat 9 at the top.

When ignited from the top in this way, the combustion of the bamboo charcoal 1 for fuel proceeds from the top to the bottom, turning into ash 8 from above, so it remains as cylindrical ash 8 until the end without sinking. .

Moreover, the bamboo charcoal 1 for fuel may have a structure in which the ends thereof are coated with or impregnated with an ignition agent such as thermite.

(Effects of the Invention) As explained above, according to the bamboo charcoal for fuel according to the present invention, it is easy to burn by utilizing the characteristics of bamboo, has an excellent design, does not burst during t!8 firing, and has no odor. You can get strong firepower with a small amount, you can calculate the burning time, and it is easy to ignite and dispose of the ashes, so you can enjoy charcoal grilling indoors by placing it on the table.

Furthermore, since bamboo, which has a strong reproductive capacity and has not been used as a resource in the past, can be used as fuel, bamboo bushes all over the country can also be effectively used as a valuable energy source.

[Brief explanation of drawings]

FIG. 1 is a perspective view of bamboo charcoal for fuel according to an embodiment of the present invention, FIG. 2 is a perspective view of bamboo charcoal for fuel placed in a wire mesh, and FIG. 3 is a sectional view showing the bamboo charcoal for fuel transferred to a stove. Figures 4 to 6 are cross-sectional views sequentially showing the combustion state of bamboo charcoal for fuel;
The figure is a front view of bamboo charcoal for fuel to which a mat impregnated with an ignition agent is adhered according to another embodiment. 1...Bamboo charcoal for fuel 2...Hollow part 4...Stove 6...Air hole 8-...Ash IO--Mat 1A, IB...Bamboo charcoal 3...Wire mesh 5... Combustion chamber 7...Combustion section 9-...Combustion flame

Claims (2)

[Claims] (1) Bamboo charcoal for fuel use, characterized in that a plurality of pieces of bamboo charcoal with a small outer diameter are inserted into a hollow part of the bamboo charcoal with a large outer diameter that opens in the vertical direction. (2) Bamboo charcoal for fuel use, characterized in that a plurality of pieces of bamboo charcoal with a small outer diameter are inserted into a hollow part of the bamboo charcoal with a large outer diameter that is open in the vertical direction, and the bamboo charcoal is housed in a case-like wire mesh.