JP2008074687A - Grain husk ash, incense burner ash, method of manufacturing grain husk ash and apparatus for manufacturing grain husk ash - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide grain husk ash having a form different from gray fine powder, incense burner ash obtained by using the grain husk ash, a method of manufacturing the grain husk ash and an apparatus for manufacturing grain husk ash. <P>SOLUTION: In the apparatus 1 for manufacturing grain husk ash, the grain husk is roasted in a first firing part 2 at about 600°C to produce smoked charcoal and the grain husk is burnt at about 800-1,000°C in a standing still state in a second firing part 3. The grain husk ash manufactured in the second firing part is free from unburned carbon to exhibit white color and is fired in the state of standing still to keep an original shape and to be shaped flake-like. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to cereal husk ash obtained by firing cereal husk, a censer ash using the cereal ash, a method for producing cereal ash, and a cereal ash production apparatus.

  2. Description of the Related Art Conventionally, there is known a method of obtaining grain shell char (charcoal) by carbonizing grain shells represented by rice hulls (see, for example, Patent Document 1).

It is known that such charcoal can be applied to the soil to promote the reduction of pathogenic bacteria present in the soil and the relaxation of continuous cropping failures, and is also effective as a compost.
JP 2005-264001 A

  In the process of obtaining firewood charcoal, grain husk ash (hereinafter referred to as grain husk ash) is generated as a by-product. Therefore, the present inventor has come up with the idea of effectively using this grain husk ash as incense ash. However, the grain husk ash obtained as a by-product of firewood is a gray fine powder. For this reason, when grain husk ash is used as incense ash, the incense ash is buried in the incense burner without any gaps, so that air is not supplied to the portion of the incense stick that is buried in the incense burner ash, leaving burnt in the incense burner ash. End up. Further, if the incense burner ash is white, the product value is increased because it has a high-class feeling, but the grain husk ash obtained as a by-product of charcoal is gray, so it is impossible to meet such a demand.

Grain husk ash is a silicon oxide (silica / SiO ₂ ), which is the main inorganic component, so it is attracting attention as a filler for various types of metal and as a raw material for metallic silicon. However, grain husk ash obtained as a by-product of charcoal has a problem that it is so fine that it rises like dust and is difficult to handle. Moreover, since the grain husk ash obtained as a by-product of the charcoal is gray, there is also a problem that it cannot be blended as a filler in those whose appearance is important.

  In view of the above problems, the subject of the present invention is cereal husk ash having a form different from that of gray fine powder, incense ash using the cereal ash, method for producing cereal ash, and cereal ash production. To provide an apparatus.

  In order to solve the above-described problems, the present invention is characterized in that cereal husk ash obtained by firing cereal husk contains flaky cereal husk ash having a white color with no unburned carbon remaining as a main component. In the present invention, the term “without unburned carbon does not remain” includes not only the case where no unburned carbon remains, but also includes the state of being white even when a very small amount of unburned carbon remains. It is.

  The grain hull ash according to the present invention has a relatively hard flake shape that generally retains the original shape of the grain hull, and the main component is silicon oxide (silica). For this reason, the grain husk ash according to the present invention is easy to handle because it does not rise like dust when it is used as various fillers or as a raw material for metal silicon. Further, the grain hull ash according to the present invention has almost no unburned carbon and is white, so that it can be used as a filler for those whose appearance is important. Therefore, the grain ash according to the present invention can be expanded in use, unlike the conventional grain ash made of gray fine powder.

  The grain husk ash according to the present invention is preferably used, for example, as an incense burner ash. When flaky cereal ash is used as the incense burner ash, a sufficient gap can be secured between the incense burner ash in the incense burner, so that air is sufficiently supplied into the burnt ash. Therefore, no incense burner remains in the incense ash. Moreover, since the flaky cereal ash used for the incense burner ash is white, it has a high-class feeling and its commercial value is high.

  The present invention is characterized in that when producing grain husk ash, white flaky grain husk ash is obtained by firing in a state in which the grain husk is allowed to stand until unburned carbon does not remain and turns white. In the present invention, since the cereal shell is fired in a stationary state, flaky cereal husk ash generally retaining the original shape of the cereal shell can be obtained. In the present invention, “baking in a state where the grain shell is allowed to stand” means that the grain shell is fired without stirring, and includes cases where the grain shell is left standing on a conveyor and continuously fired. Meaning.

  In the method for producing cereal husk ash according to the present invention, the cereal husk is baked while being stirred to obtain the husk charcoal of the cereal husk, the gas generated when obtaining the husk charcoal is burned, and the heat is used to The cereal husk in the placed state is fired until it becomes white flaky cereal husk ash with no unburned carbon remaining. In such a cereal husk ash production apparatus, firewood charcoal and white flaky cereal husk ash can be produced at the same time, and white flaky cereal husk ash is produced using the combustion gas generated during the production of firewood charcoal. Since it manufactures, the manufacturing cost can be reduced.

  In the grain husk ash production apparatus according to the present invention, a first firing part for firing grain husks to form charcoal, and a gas generated in the first firing part are combusted, and the heat is left stationary. And a second calcining section that calcines the cereal husk in such a state until the flaky cereal husk ash having a white color without remaining unburned carbon remains. In such a cereal husk ash production apparatus, firewood charcoal can be produced in the first calcination section, and white flaky cereal husk ash can be produced in the second calcination section. For this reason, it is possible to produce firewood and white flaky cereal ash at a predetermined ratio simply by adjusting the amount of cereal husk input to the first calcination part and the second calcination part. Moreover, since white flaky cereal husk ash is manufactured using the combustion gas generated at the time of manufacture of lignite, manufacturing cost can be reduced.

  Since the grain husk ash according to the present invention is in the form of flakes, it is easy to handle because it does not rise like dust when used as a silicon oxide-based filler or as a raw material for metallic silicon. Moreover, since the grain hull ash which concerns on this invention is white, it can be used as a filler etc. with respect to the thing where an external appearance is regarded as important. Therefore, the grain ash according to the present invention can be expanded in use, unlike the conventional grain ash made of gray fine powder. Further, when using the grain husk ash according to the present invention as a censer ash, because it is in the form of flakes, it is possible to ensure a sufficient gap between the censer ash in the censer so that air is sufficiently supplied in the censer ash, There is no incense stick left in the incense burner ash. Moreover, since the flaky cereal ash used for the incense burner ash is white, it has a high-class feeling and its commercial value is high.

  Below, with reference to drawings, the manufacturing method and manufacturing apparatus of the grain hull ash to which this invention is applied are demonstrated.

  1 (a) and 1 (b) are a schematic configuration diagram of an apparatus for producing grain husk ash to which the present invention is applied, and an explanatory diagram showing an example of an arrangement form of baking containers in a second baking section.

  As shown in FIG. 1 (a), the grain hull ash production apparatus 1 of the present invention is an apparatus for producing firewood charcoal and white flaky grain hull ash from grain hulls such as rice hulls and buckwheat hulls. The first firing part 2 for producing the charcoal by firing the grain shell, and the second for producing the white flaky grain shell ash by firing the grain shell at a temperature higher than that of the first firing part 2. And firing section 3.

  The first firing section 2 is an incinerator made of a rotary kiln or the like, and is a cylindrical shape made of stainless steel or the like having an inlet for grain husks used for producing charcoal and an outlet for burning coal obtained by incineration. And a heating chamber for heating the outer surface of the shell (none is shown). The shell is disposed so as to lie in the heating chamber. By heating the shell while rotating around the axis, the grain shell supplied into the shell is fired while being stirred.

  In the present invention, the grain husk is baked at a temperature of about 300 to 600 ° C., preferably about 400 to 600 ° C. in the shell to form charcoal, and then discharged from the outlet. Although the charcoal discharged from the outlet is carbonized, it is still in a high temperature state, so it is cooled using a water-cooled cooling device (not shown) or the like, and further firing is stopped. In addition, when using a water-cooling type cooling device, you may use it to control the temperature of the 1st baking part 2 using cooling water.

  The second firing section 3 has a combustion chamber 31 having a bottom, and the combustion chamber 31 and the first firing section 2 are connected by a flue 4. For this reason, the combustion gas generated by baking the grain shell in the shell of the first baking unit 2 is supplied into the combustion chamber 31 through the flue 4, and this combustion gas is burned in the combustion chamber 31. Then released. At that time, the discharged gas is discharged after passing through a removing device (not shown) such as dust.

  Here, in the combustion chamber 31, the combustion gas generated in the first firing unit 2 is combusted, so that the temperature in the combustion chamber 31 is higher than that of the first firing unit 2, for example, about 800 to 1000. It becomes ℃. Therefore, in this embodiment, the grain shell used for grain ash production is put into the combustion chamber 31 and fired at a temperature of about 800 to 1000 ° C. At that time, for the cereal husk for producing cereal ash, for example, in a state in which a predetermined amount is filled in a container having excellent heat resistance and heat transfer and air permeability, for example, a mesh-like cup-shaped container 5, Place in the combustion chamber 31. As shown in FIG. 1B, the grain husk is preferably arranged in the combustion chamber 31 so as to be separated from each other in a state of being divided into a plurality of containers 5. If the grain husks are arranged in a plurality of containers 5 so as to be separated from each other, the combustion gas supplied from the flue 4 efficiently passes between the containers 5 as indicated by arrows in FIG. Therefore, even when baked in a state in which the grain shell is left still, it can be heated evenly. Moreover, even when the grain husk is baked in the discharge path of the combustion gas from the flue 4 as in this embodiment, the passage of the combustion gas is smooth.

  In this way, when the grain husk for producing grain ash is baked in a state of standing at a temperature of about 800 to 1000 ° C., it is burned at a high temperature of about 800 to 1000 ° C., so that it is unburned. No carbon remains and the main component is white and hard grain hull ash with silicon oxide. Further, since the grain husk for producing grain ash is fired in a stationary state, it becomes a flaky grain hull ash generally retaining the original shape of the grain husk.

(Main effects of the present invention)
As described above, the cereal husk ash to which the present invention is applied is a flaky cereal husk ash that exhibits a white color with no unburned carbon remaining. For this reason, when using the grain husk ash itself to which the present invention is applied as various fillers or the like, or as a raw material for metallic silicon, it does not rise like dust and is easy to handle. Moreover, since the grain hull ash which concerns on this invention is white, it can be used as a filler etc. with respect to the thing where an external appearance is regarded as important. Therefore, the grain ash according to the present invention can be expanded in use, unlike the conventional grain ash made of gray fine powder.

  For example, when the grain husk ash to which the present invention is applied is used as an incense burner ash, since it is in a flake shape, a sufficient gap can be secured between the incense burner ash in the incense burner. Therefore, since sufficient air is also supplied into the incense burner ash, no incense burner remains in the incense burner ash. Moreover, since the grain hull ash to which the present invention is applied is white, the incense ash has a high-class feeling and a high commercial value.

  Moreover, in the grain hull ash manufacturing method and the grain hull ash manufacturing apparatus 1 to which the present invention is applied, the first calcining unit produces the charcoal and the second calcining unit produces the white flaky grain hull ash. To do. For this reason, it is possible to produce firewood and white flaky cereal ash at a predetermined ratio simply by adjusting the amount of cereal husk input to the first calcination part and the second calcination part. Moreover, since white flaky cereal husk ash is manufactured using the combustion gas generated at the time of manufacture of lignite, manufacturing cost can be reduced.

(Other embodiments)
In the above embodiment, the case where flaky cereal ash is used as an incense burner ash has been described as an example, but the flaky cereal ash according to the present invention is composed of silicon oxide (silica) as a main component. It may be used as an additive or filler for paints, cements, etc., or as a raw material for metallic silicon. Further, the flaky grain ash according to the present invention may be used for soil improvement or the like.

(a), (b) is each a schematic block diagram of the apparatus for producing grain husk ash to which the present invention is applied, and an explanatory diagram showing an example of an arrangement form of baking containers in a second baking section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grain husk ash production apparatus 2 1st baking part 3 2nd baking part 5 Container 31 Combustion chamber

Claims (5)

In cereal husk ash obtained by firing cereal husk,
Grain husk ash characterized in that it contains flaky cereal husk ash that has a white color with no unburned carbon remaining.   Incense burner ash characterized by using grain husk ash as defined in claim 1. In producing grain husk ash,
A method for producing cereal husk ash, characterized in that white flaky cereal husk ash is obtained by firing the cereal husk in a stationary state until the unburned carbon remains white and remains white. In claim 3,
The grain husk is baked with stirring to obtain the charcoal of the grain husk, and the gas generated when the charcoal is obtained is burned. A method for producing cereal husk ash, which is fired until it becomes white flaky cereal ash without remaining. A grain hull ash production apparatus for producing grain hull ash,
A first firing part for firing grain husks to form charcoal, and a gas generated in the first firing part are combusted, and by the heat, unburned carbon A grain husk ash producing apparatus, comprising: a second calcining unit that calcines until it becomes white flaky grain ash without remaining.

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