JPH0121963Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an ignition layer and an ignition briquette provided with an ignition layer.

[Background technology]

Ignition briquettes are equipped with an ignition area on the top of the main body that can be easily ignited with a flame as weak as a pine flame.
The user simply lights the ignition area with a matchstick, and the flame gradually spreads to the entire body, making it extremely convenient. For this reason, it is not only used at home, but also when cooking outdoors, and its usage is rapidly increasing.

FIG. 5 shows the conventional structure of this type of ignited briquette. This ignited briquette 1 has an ignition layer 3 laminated on a main body 2. The ignition layer 3 heats the main body 2 to ignite it, and although it is more easily flammable than the main body 2, it is not easily ignited by a matchstick flame. A recess 4 is provided on the upper surface of the ignition layer 3, and a ignition plate 5 is fitted into the recess 4, which is easily ignited by a match flame. When the ignition plate 5 is fitted, on the underside of the ignition plate 5,
A combustion gap 6 is adapted to be formed. The main body 2, the ignition layer 3, and the ignition plate 5 usually have air holes 2a and 5a passing through them, so that the air necessary for combustion flows upward.

This ignited briquette had the following problems. In other words, when the ignition plate 5 is ignited, from 20 seconds
For about 30 seconds, a long flame rose and the fire moved to ignition layer 3, but the way the fire moved to the ignition layer was often partial and uneven. In addition, after the long flame sinks, the fire is hidden under the white ash and slowly burns to the lower layer, so by the time the main body 2 is ignited and flames are emitted from all the air holes, the ignition After that, it usually took a relatively long time of 40 to 50 minutes. Therefore, ignition briquettes generally have a major problem in that they cannot be used when it is desired to start a fire quickly. In order to solve this problem, various improvements have been made, including the ignition plate, but this has not resulted in a dramatic increase in the ignition time of the main body.

The root cause of the time it takes to ignite the main unit is
The problem lies in the fact that the combustibility of the base ash and powder coal used as the main material for the ignition plate and ignition layer is not very good. Powdered ash coal is made by finely crushing ash coal, and it does not ignite immediately even when brought close to a pineapple.Furthermore, a binder is added to it to form an ignition plate or ignition layer. This makes it even more difficult to burn. Therefore, in order to make the ignition plate and ignition layer more combustible, a large amount of expensive chemicals such as strontium nitrate must be used, which is one of the causes of high costs.

[Purpose of invention]

In view of the above-mentioned circumstances, the object of this invention is to provide a low-cost ignited briquette that takes a short time to ignite the main body, even if the amount of expensive chemicals such as strontium nitrate is small.

[Disclosure of invention]

In order to achieve the above object, this invention has a concave part on the upper surface of the main body, a concave ignition layer containing paulownia charcoal powder as an essential component is embedded in this concave part, and a paulownia charcoal lump is placed in the concave part of the concave ignition layer. The gist is an ignited briquette in which the ignition layer, which is an essential component, is embedded and the whole is integrated.

Hereinafter, the structure of the ignited briquette according to this invention will be explained in detail based on examples thereof.

FIG. 1 and FIG. 2 show an example thereof,
As shown in the figure, this ignition briquette is integrally molded as a whole, with an ignition layer 8 disposed on a main body 7, and an ignition layer 9 disposed on this ignition layer 8. That is, a recess 7a is formed in the upper surface of the main body 7, and the ignition layer 8 is embedded in this recess 7a. This ignition layer 8 has a concave shape,
An ignition layer 9 is embedded in the depression 8a. Air holes 10 are provided in the main body 7, ignition layer 8, and ignition layer 9.
is penetrated. An auxiliary ignition wick 11 is inserted into the central air hole 10 from above. All sides of this ignited briquette are packed with anthracite coal 12.

In the above configuration, the ignition layer 9 includes, for example, paulownia charcoal lumps having a calorific value of approximately 7000 cal/g and a small moisture content, which are crushed to a particle size of approximately 10 to 20 mm. . The paulownia charcoal lump may be as fine as about 5 mm, or as coarse as about 25 mm. Although paulownia charcoal is originally made of a highly combustible material, it also has numerous pores that allow for good ventilation and a structure that is convenient for combustion. Therefore, even without the addition of chemicals such as strontium nitrate, it will ignite just by bringing a matchstick close to it, and combustion will proceed spontaneously. The reason why paulownia charcoal blocks of approximately 1 to 2 cm square are used is because of their size.
This is because it maintains pores that are advantageous for combustion, makes it easy to mix with raw ash powder coal, chemicals, etc., and is large enough to prevent the ingredients from becoming unnecessarily bulky. The ignition layer 9 is on this paulownia charcoal block,
It is formed by adding a binder, base ash, powdered coal, etc.
In this case, the blending ratio of the paulownia charcoal mass is appropriately determined in consideration of the need to reduce the amount of chemicals such as strontium nitrate used, and the need to add base ash powder for convenience in molding. The reason for adding base ash powder charcoal is that it is necessary to fill the gaps between the paulownia charcoal lumps. There is a risk that the combustibility will decrease when using raw ash powder coal that is difficult to burn, but since the ignition layer 9 has paulownia charcoal lumps, which are highly combustible, as an essential ingredient, there is no need to worry about this, and above all, it is convenient because it is inexpensive. good.

The ignition layer 7 is formed by adding a binder, raw ash powder, etc. to paulownia charcoal powder obtained by crushing paulownia charcoal into pieces of 2 mm or less. If necessary, a small amount of a chemical such as strontium nitrate may be added. In this case as well, the blending ratio of paulownia charcoal powder is determined as appropriate, taking into consideration the need to reduce the amount of chemicals such as strontium nitrate used, and the need to add base ash powder for convenience in molding. . Due to its function, it is not convenient for the ignition layer 7 to burn out quickly like the ignition layer 9, so as mentioned above, the paulownia charcoal is crushed more finely than in the case of the ignition layer to reduce the number of pores. This is to reduce the flammability a little.

The auxiliary ignition wick 11 inserted into the central air hole 10 from above is made of string-shaped paper or fiber impregnated with a combustion auxiliary agent. As the combustion auxiliary agent, a material that is permeable and non-hygroscopic and also makes the ignition auxiliary wick combustible is suitable, such as paraffin. The auxiliary ignition wick 11 may have any shape as long as the fire ignited therein can be reliably transmitted to the ignition layer 9 and can be fixed within the pores 10. Ignition auxiliary wick 11
For example, as shown in FIG.
From then on, you will not fall.

The manner of ignition in the ignited briquette with the above structure will be explained in detail. The example used for this explanation is as follows. That is, the main body 7 is made of anthracite and slaked lime in a weight ratio of 95:5.
It is made using 565g of a compounded material made by adding 2 parts by weight of a binder to 100 parts by weight. The ignition layer 8 is
It is made using 110g of a blended material made by adding 2 parts by weight of a binder to 100 parts by weight of the main material, which is a mixture of paulownia charcoal powder with an average particle size of 1 mm and raw ash powder in a weight ratio of 30:70. There is. The ignition layer 9 contains 5 parts by weight of strontium nitrate and 5 parts by weight of barium nitrate with respect to 90 parts by weight of the main material, which is a mixture of paulownia charcoal lumps with an average particle size of 10 mm and raw ash powder coal in a weight ratio of 30:70. It is made using 110g of compounded material with 2 parts by weight of binder added. Regarding these dimensional relationships, the ignition layer 8 is:
The maximum outer diameter is 80 mm and the depth is 25 mm, and the ignition layer 9 has a maximum outer diameter of 60 mm and a depth of 15 mm.

When the ignition auxiliary wick 11 is ignited with a match, the flame quickly moves to the ignition layer 9 via the ignition auxiliary wick. Since the ignition layer 9 burns vigorously, the heat immediately raises the ignition layer 8 to a high temperature. Since paulownia charcoal powder with high combustibility is also used in the ignition layer 8, fire quickly and evenly moves to the ignition layer 8. Although the flame in the ignition layer 9 disappears in about 20 to 30 seconds, the paulownia charcoal lumps in the ignition layer still retain fire and are in a so-called charcoal state. The fire transferred to the ignition layer 8 is transferred one after another to the paulownia charcoal powder, which has a large calorific value, and soon reaches the main body 7. The paulownia charcoal powder in the ignition layer also turns into charcoal, so at this stage large and small charcoal fires are placed on the top of the main body, creating conditions favorable for ignition, and the main body ignites soon. As described above, it takes about 10 minutes to ignite the main body after lighting the auxiliary ignition wick, which is a significant time saving compared to conventional ignition briquettes. In this respect, this ignited briquette is extremely useful.

For comparison, the same ignition briquettes were used except that the paulownia charcoal lump in the ignition layer 9 in the ignition layer 9 was replaced with paulownia charcoal powder, that is, the ignition layer was made of paulownia charcoal powder and raw ash powder with an average particle size of 10 mm. The main material is blended at a weight ratio of 30:70.
An ignition briquette was produced using 110 g of a blended material consisting of 90 parts by weight, 5 parts by weight of strontium nitrate, 5 parts by weight of barium nitrate, and 2 parts by weight of a binder, and an ignition experiment was conducted. However, this ignition briquette of the comparative example has auxiliary ignition wick 11.
The flame did not necessarily ignite the ignition layer, making it impractical.

As mentioned above, in the ignition briquette of this invention, both the ignition layer and the ignition layer contain paulownia charcoal, which is highly combustible, as an essential ingredient, so the amount of chemicals that are about three times more expensive than that required is significantly greater than in the past. can be saved and produced at low cost.

By the way, conventionally, in ignition briquettes, the moisture content of the ignition layer and the main body is about 80% and about 11-12%, respectively, and there is a considerable difference in the moisture content of the two, so , uneven dryness occurs,
There was a problem that drying efficiency was poor, and areas that finished drying too quickly were likely to catch fire. In this regard, in the ignited briquette according to this invention, the above-mentioned problem in the low-temperature drying process after molding can be solved by appropriately determining the mixing ratio of paulownia charcoal powder and base ash powder, which are essential components of the ignition layer. is possible. That is,
The moisture content of base ash powder coal is approximately 18%, while the paulownia charcoal powder contains almost no moisture, so by mixing the two appropriately, the moisture content as a whole is the same as that of main body 7, which is 11 to 12%.
%, the moisture content will be uniform and small throughout the briquettes, increasing drying efficiency and reducing the risk of ignition during the drying process. However, adjusting the water content in this way is not an essential condition for this invention.

The ones shown in Figures 1 and 2 have a lower body part below the ignition layer than normal ignited briquettes,
It is generally formed into a low cylindrical shape. This has the advantage of preventing waste when used in cases where the usage time is short. However, as shown by the dashed line in FIG. 2, the main body portion may be made thicker in a normal configuration.

In addition, as shown in FIG. 2, by reducing the overall thickness and making it flat, the following effects can also be obtained. In other words, since the entire material is thin, the center can be easily dried during low-temperature drying after molding.
It is efficient as it does not take much time. Furthermore, since the exposed surface area per unit mass of the ignition layer and ignition layer is large, oxygen supply during combustion is rapid.
The combustion speed is fast and the time required for ignition of the main body can be shortened.

By the way, in general, in ignition briquettes, since the main body and the ignition layer are molded simultaneously, it is impossible to avoid components in the ignition layer flowing into the main body, which causes incomplete combustion in the main body. This may cause problems such as heavy smoke and poor fire life. Problems like this can be solved as follows:
can avoid. That is, the upper layer A having the structure as shown in FIGS. 1 and 2 and the lower layer B below it consisting of only the main body material are molded separately and dried at a low temperature, and then combined to form the structure shown in FIGS. 3 and 2. 4
The method is to configure the ignited briquette as shown in the figure.
By molding the upper layer and the lower layer separately in this way, there is no fear that the lower layer will be contaminated by the components of the ignition layer. This is because although contamination of the upper main body portion by components of the ignition layer is unavoidable, if the amount of the main body portion is reduced from the beginning, the amount of the main body that is contaminated can be kept to a small amount.

On the other hand, if the lower layer parts of various sizes are attached in advance, it becomes possible to select the lower layer part of an appropriate size depending on the length of use time and use it in combination with the upper layer part. When it is desired to use the device for a relatively short time of about 1 to 2 hours, only the upper layer portion A can be used without combining the lower layer portion B. If only the upper layer is used, it is also useful as a tabletop briquette because it is small in size.

The upper surface of the lower part B shown in FIGS. 3 and 4 is tapered toward the center to form a concave surface 7d. Therefore, when it is combined with the upper layer part A, a void is created at the boundary part. The lower layer is composed only of the main material, but during the manufacturing process and storage period, the surface is constantly in contact with the outside air, so it is susceptible to deterioration and impurities, and it is inevitably less active than the inside. It gets lower. The same thing can be said about the upper layer, so when the two parts are combined, a layer with low activity will be formed at the contact surface, and the fire in the upper layer will be extinguished without transferring to the lower layer. or smoke may be emitted due to incomplete combustion. However, if a gap is created between the upper layer and the lower layer in this way, when the fire moves to the bottom of the upper layer, the gap will be used as a combustion chamber and the fire will burn.
Since the heat generated by the combustion is unlikely to be absorbed by the lower layer, the void easily reaches a high temperature, making it easier to ignite the lower layer.
When actually using the ignited briquettes, a medicine can (kettle, etc.) with a bottom surface with good heat reflectivity is placed over the ignited briquettes.
The temperature of the void increases efficiently over time. By making the upper surface of the lower layer concave in this manner, continuous combustion from the upper layer to the lower layer can be performed more reliably.

[Effect of idea]

The ignition briquette of this invention, which uses paulownia charcoal lumps and paulownia charcoal powder for the ignition layer and ignition layer, has good ignitability without using expensive chemicals such as strontium nitrate, and the time required to ignite the main body is short. has become significantly shorter, resulting in lower costs.

[Brief explanation of the drawing]

FIG. 1 shows the second embodiment of the first embodiment of this invention.
Figure 2 is a plan sectional view taken along the line.
It is a side sectional view of an example. FIG. 3 is a sectional perspective view taken along the line of FIG. 4 of the second embodiment of the present invention, and FIG. 4 is a side sectional view of the second embodiment. FIG. 5 is a cross-sectional view for explaining the structure of a conventional ignited briquette. 7...Main body, 8...Ignition layer, 9...Ignition layer.

Claims (1)

[Scope of utility model registration request] The main body has a recessed part on the upper surface, a recessed ignition layer having paulownia charcoal powder as an essential component is embedded in this recess, and an ignition layer having paulownia charcoal lump as an essential component is embedded in the recess of this recessed ignition layer. , a ignited briquette that is a whole.