JP2003053144A - Air cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean air and to suppress global warming by removing carbon dioxide and harmful substance that have greenhouse effect from the air by shell powder and further to effectively use an unnecessary substances without causing health disturbance by the harmful substances. SOLUTION: A surface constituting material having the shell powder obtained by grinding the sell is provided on the surface of a structure facing the outside air and room air, and the air is cleaned by the adsorptive decomposition of the carbon dioxide, etc., and the harmful substance contained in the air to the shell powder.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for adsorbing and decomposing carbon dioxide and other harmful substances contained in the air to purify them.

[0002]

In recent years, the amount of carbon dioxide contained in the atmosphere has increased with the use of fossil fuels, and the greenhouse effect due to the increased concentration of carbon dioxide has become a concern. Then, the shift to solar power generation, wind power generation, geothermal power generation, etc. is being considered,
Attempts have been made to reduce carbon dioxide emissions in the industrial fields where various types of production are carried out, and deteriorating forest development and protection of the natural environment such as afforestation are being implemented. However, the shift to the use of natural energy in the electric power field is just beginning, and in an attempt to protect the natural environment, expand forests, and absorb CO2 exploration by plants, tree cultivation is being promoted. Since it takes years, it cannot be expected to reduce carbon dioxide under the present conditions. Further, in the above-mentioned industrial field, carbon dioxide continues to be released along with production, and it is not an effective means for reducing carbon dioxide in the atmosphere.

Further, at present, many automobiles are used in physical distribution, and a large amount of carbon dioxide is also emitted as a part of exhaust gas, which is one of the factors that increase the amount of carbon dioxide in the atmosphere. However, at present, no measures are taken to remove carbon dioxide contained in the atmosphere. Since the concentration of greenhouse gases such as carbon dioxide has been increasing in the atmospheric environment in this way, volatile organic compounds (VO
Since harmful substances such as C) and formaldehyde are also increasing and becoming a problem, it is desired to remove them from the atmosphere.

To solve the above-mentioned problems, the inventor of the present invention crushes the shells of many shells in the natural world, especially the shells that have been disposed of as wastes after taking out the edible contents, by smashing them. We focused on the fact that the powder obtained by this method has excellent adsorption performance. Therefore, in view of the above circumstances, the present invention aims to remove harmful substances such as carbon dioxide which is a greenhouse gas from the air by shell powder, and purifies the air to suppress global warming. The purpose is to prevent harmful substances from causing health problems and to effectively use waste materials.

[0005]

The present invention has been made in consideration of the above problems, and has a surface forming material having shell powder obtained by crushing shells on the surface of a structure facing the outdoor atmosphere or indoor air. The above problem is solved by providing an air purification method characterized in that the air is purified by adsorbing and decomposing carbon dioxide and other harmful substances contained in the air with respect to the shell powder. Then, in the present invention, the surface constituent material may be a road surface material such as asphalt or concrete, and also a road surface coating material constituting a road marking, a wall surface decorative material, a roofing material such as a roofing material. Is what you can do.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the following embodiments. First, in order to obtain the shell powder used in the present invention, various shells of shellfish can be used. In particular, it is very easy to obtain shells that have been disposed of as trash after taking out edible contents as waste. For example, shells such as scallops, oysters, clams, mill shells, clams, pearl oysters, clams and abalone can be used, and other shells thereof can also be used. In this way, since the shells that have been treated as waste are used, the waste can be effectively used and the waste can be reduced.

The raw material shell is a natural porous material containing calcium, and the shell powder obtained by firing and crushing this natural porous material is also porous and alkaline, and therefore the shell powder is By placing in the air, carbon dioxide that shows acidity and harmful substances such as volatile organic compounds and formaldehyde will be adsorbed on the shell powder side, and it will act as a catalyst to decompose them. Like The particle size of the above shell powder is not particularly limited, but is preferably in the range of about 0.001 to 0.2 mm, and it is also possible to change the fineness at the time of crushing or to mix different fineness Is.

A preferable example of the shell powder is a shell powder having a crystal structure of a calcite type structure of calcium carbonate, the calcium carbonate powder consisting of porous particles having a particle size of about 200 μm and the calcium carbonate. It is preferable that calcium oxide powder obtained by firing the powder is mixed. In obtaining the shell powder, first, a scallop shell in which at least a major part of the shell is a crystal structure having a calcite type structure of calcium carbonate is used. Most of the scallop shells have this crystal structure. That is, in its ecology, the scallop moves swiftly as it is said to "swim in the sea" by opening and closing shells and expelling seawater vigorously to the outside. It is characteristic and has a large scallop so that this operation can be performed, and the shell itself has the conditions that it is relatively thin and lightweight and has strength, and the shell has a calcite type structure of calcium carbonate. In the inner shell layer (the core layer in the thickness direction of the shell), the crystal structure of calcite-type structure of calcium carbonate has a plate-like structure. , The structure of the inner surface of the shell and the inner layer of the shell forms the main part of the shell (the part excluding the surface layer and the hinge part), which makes it thin and lightweight but strong. And, as described above, in the main part of the scallop shell, the crystal structure of the calcium carbonate calcite structure has a leaf-like structure on the inner surface side (a state in which needle-like crystals are densely packed like a sword mountain and laid side by side). ), The inner layer of the shell has a plate structure of a calcite-type crystal structure of calcium carbonate (like veneer boards, layers in which needle crystals are arranged in the same direction are overlapped, and the orientation of the needle crystals) Since each layer has a different state), each grain obtained by crushing the scallop shell has a calcite-type structure and strongly exhibits porosity.

As described above, an example of using scallop shells as a raw material in obtaining shell powder was shown. Especially, in the case of scallops, after removing the scallops, the scallops were disposed of as waste and loaded outdoors. The waste that has been treated in this way can be used, and the waste can be effectively used.
First, the collected shells are dried in the sun for 3 to 5 years to dry and harden. This condition is suitable for shells that have been conventionally loaded and disposed of outdoors. Next, the shell hardened by the sun drying is heated at a temperature of about 120 ° C. for 20 to 3 times.
Bake for about 0 minutes. This heating is to incinerate the impurities adhering to the shell, and unless the impurities are removed, the impurities to be obtained will be mixed in a large amount. Then, the shells from which the impurities have been incinerated are pulverized to a particle size of about 200 μm. The crushing method itself is not particularly limited, and an existing crushing device may be used. Thus, calcium carbonate powder is obtained, and the granules are porous. Next, a part of the calcium carbonate powder consisting of the above-mentioned porous granules is used and put in a rotary kiln and heated at a temperature of about 1050 ° C. for about 3 hours to obtain a calcium oxide powder. Then, the shell powder is obtained by mixing the calcium oxide powder thus obtained with the calcium carbonate powder.

In the present invention, the shell powder obtained as described above is used to purify air, and the shell powder is fixed so that the air is always in contact with the air. In other words, the shell powder is fixed on the surface of a structure such as a building or a road facing the outdoor air or indoor air, and the shell powder is provided on various surface constituent materials described below that form the surface of the structure. The shell powder is positioned so as to be constantly in contact with air on the outer surface of the surface constituting material. In this case, the shell powder may be mixed when the surface constituting material is molded, and the shell powder can be exposed to air while being fixed. As a result, greenhouse gases such as carbon dioxide contained in the air and the above-mentioned harmful substances come into contact with the shell powder to be adsorbed and decomposed, and it is possible to actively reduce the amount from the air.

The surface constituent material does not have to be a member separate from the main body of the structure, and may be the material itself that constitutes the structure. For example, the structure is a road, and the road surface material itself such as asphalt or concrete when the road is laid is a surface constituent material. Then, the shell powder may be mixed with the road surface material when the road is laid, and the surface constituent material located on the road surface portion has the shell powder.
In this case, the degree of contact between the exhaust gas of an automobile and the road surface material is extremely high, and it becomes possible to positively adsorb and decompose harmful substances such as carbon dioxide and suspended particulate matter (SPM) contained in the exhaust gas. Further, in the road, the road surface coating material that constitutes the road marking (white line of pedestrian crossing, lane separation line) and the like is also a surface constituent material, and this shell powder may be mixed when manufacturing this road surface coating material, By laying a road surface coating material on the upper surface of the road, it is possible to easily fix the shell powder. Further, a slope may be formed laterally on the road, and the slope material, which is a surface constituent material on the slope, may include the shell powder.

As a surface constituent material of a structure, there is a wall surface decorative material used for the purpose of protecting the outer surface of a building and adjusting the appearance. As the wall surface decorative material, there are paints, wall tiles, mortar and the like, and if the shell powder is mixed at the time of its production, the shell powder can be fixed on the outer surface of the building. Further, the wall mortar may be mixed at the time of wall finishing, and when it is mixed with the paint, shell powder can be used as a pigment. On the other hand, various surface constituting materials are also used in the internal space of the building, for example, there is a cosmetic paint, and the shell powder may be mixed to form the cosmetic paint. Further, roofing materials such as roof tiles are used as surface constituting materials in roofs of general houses, but shell powder may be mixed with these roofing materials.

Although various kinds of surface constituting materials have been exemplified as described above, the surface constituting materials are not limited to the above examples in the present invention. Although an example of producing shell powder through steps such as sun drying, firing, and pulverization has been shown, the method for producing shell powder used in the present invention is not limited to the above example.

[0014]

According to the present invention described above, the shell powder that adsorbs and decomposes carbon dioxide and other harmful substances is immobilized on various surface constituting materials of the structure so that the air is kept in constant contact. Therefore, it becomes possible to actively reduce carbon dioxide and other harmful substances in the air, that is, in the atmosphere including living space, which is effective in suppressing the greenhouse effect and preventing human health problems. In addition, since shells that have been discarded as waste can be used as a raw material, the material cost for obtaining shell powder can be kept low, and effective use of waste can be achieved. Is played.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01J 20/02 B01J 23/02 ZABA 4G066 23/02 ZAB E01C 7/26 4G069 E01C 7/26 E04B 1/92 E04B 1/92 B01D 53/36 C (72) Inventor Shinji Koyama 4-23 Sotokubo Niigata, Hachinohe City, Aomori Prefecture F-term (reference) 2D051 AA05 AD07 AE05 AF14 AG01 AH02 EA06 EB07 2E001 DH00 JA06 4C080 AA05 AA07 BB02 CC02 HH05 JJ04 KK08 LL02 MM01 MM32 QQ03 4D012 BA01 CA03 CA10 4D048 AA14 AA21 AA30 AB03 BA12X BA13X BA48 BA50 EA04 4G066 AA75B CA01 CA35 CA52 DA02 4G069 BA00 BA13A BA16A BA16B BB04A BB04B BB16A BB16B BC09A BC09B CA10 CA17 CA18 EA11 EC22Y

Claims (5)

[Claims] 1. A shell powder of carbon dioxide and other harmful substances contained in the air is provided with a surface constituent material having shell powder obtained by crushing shells on the surface of a structure facing outdoor air or indoor air. An air purification method characterized by purifying air by adsorptive decomposition with respect to. 2. The air purification method according to claim 1, wherein the surface constituent material is a road surface material such as asphalt or concrete. 3. The air purification method according to claim 1, wherein the surface constituent material is a road surface coating material that constitutes a road marking or the like. 4. The surface component is a wall surface decorative material.
The air purification method described in. 5. The air purification method according to claim 1, wherein the surface constituent material is a roofing material such as a roof tile.