KR101440758B1 - Nature-friendly solid fuel producting method using food waste - Google Patents

Abstract

The present invention relates to a method for manufacturing eco-friendly solid fuel, the method including: stirring a waste food material mixed together with chaff, oak sawdust, corn stalk, rice straw, barley, wheat stalk, peanut shells and coconut shells; putting the stirred waste food material in a compressor and pressuring the stirred waste food material with a pressure of 90 to 100 tons; putting the pressured waste food material in a heating pot to heat the waste food material at 400 to 600°C for 20 hours; removing moisture and gas from the heated waste food material to form a primary molded charcoal; putting silica, sodium chloride, starch and water into the primary molded charcoal and stirring the mixture to form a fuel mixture; pressuring the fuel mixture by using a compressor with a pressure of 90 to 100 tons to form the fuel mixture into the shape of solid fuel; and drying the solid fuel at room temperature for a certain period of time and completing the manufacturing of the eco-friendly solid fuel having a strength of 180 kgf to 250 kgf before combustion, wherein the strength of ash after combustion of the solid fuel is greater than 60 kgf. The waste food material is characterized by being mixed with 90% of chaff, 2.4% of oak sawdust, 2% of corn stalk, 1.2% of a rice straw, 1.2% of barley, 1.1% of wheat stalk, 1.1% of peanut shells and 1% of coconut shells, and the fuel mixture is formed by mixing 300 to 400 g of silica, 200 to 300 g of sodium chloride, 10 to 15 g of starch and 100 to 250 g of distilled water to the primary molded charcoal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an environmentally friendly solid fuel using waste materials,

The present invention relates to a process for producing an environmentally friendly solid fuel and an environmentally friendly solid fuel produced thereby. More particularly, the present invention relates to a process for producing an environmentally friendly solid fuel which does not generate harmful substances by using abandoned waste materials, Fuel.

Recently, the use of briquettes as heating fuel has been increasing again due to the surge in oil prices. In addition, the demand for briquetted food in restaurants has increased, and the use of briquettes is increasing.

The briquettes are manufactured by "briquette production method" disclosed in Japanese Patent Laid-Open No. 1984-0003280. Normally, briquettes are produced using coal, which is a fossil fuel, so when burning briquette, harmful substances are generated.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a chart showing the analysis result of harmful components generated when burning briquettes. FIG. As shown in the chart, briquettes have a lower level of harmful components such as lead, cadmium, copper, chromium, arsenic, and mercury, but a significant amount is emitted. In particular, carbon monoxide and carbon dioxide are generated in large quantities, pollute the atmosphere, and produce carcinogenic substances such as cadmium and arsenic, which have harmful effects on the human body.

In addition, briquette residue remaining after the burning of briquettes is scattered into the air and damages the nature including soil pollution. There is a problem in that a treatment cost for separately treating the briquette material is generated separately.

An object of the present invention is to provide an environmentally friendly solid fuel production method which is harmless to the human body and nature by using waste materials that are not fossil fuels, and a solid fuel produced thereby.

Another object of the present invention is to provide an affinity light solid fuel production method capable of preventing fine dust from being scattered into the air by solidifying the ash remaining after combustion to have a certain strength or more, and to provide an affinity light solid fuel produced thereby.

Another object of the present invention is to provide an environmentally friendly solid fuel manufacturing method capable of replacing fossil fuels by providing a sufficient calorific value during combustion and to provide an environmentally friendly solid fuel produced thereby.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by a method of manufacturing an environmentally friendly solid fuel. The method for producing an environmentally friendly solid fuel according to the present invention includes the steps of stirring a rice meal, an oak sawdust, a cornstalk, a rice straw, a barley stand, a stick, a peanut shell, Placing the agitated waste material in a compressor and pressurizing the waste material at a pressure of 90 to 100 tons; Feeding the pressurized waste material into a heating pot and heating the mixture at a temperature of 400 to 600 DEG C for 20 hours; Removing moisture and gas from the heated waste foodstuff to form a primary molded charcoal; Adding silica, sodium chloride, starch, and water to the primary shaped charcoal and stirring to form a fuel mixture; Compressing the fuel mixture at a pressure of 90 to 100 tons using a compressor and shaping the fuel mixture into a shape of a solid fuel; Comprising the step of drying the solid fuel at a room temperature for a certain period of time to complete an eco-friendly solid fuel having a strength of 180 kgf to 250 kgf before the combustion and a strength of the ash after the burning of 60 kgf or more, wherein the waste material comprises 90% The fuel mixture is mixed with 1 kg of the primary shaped charcoal in an amount of 300 to 400 g of silica, 200 to 200 g of sodium chloride, 1 to 2 g of corn, 1.2% of corn, 1.2% of barley, 1.1% 300 g of starch, 10 g to 15 g of starch and 100 g to 250 g of purified water.

The object of the present invention may also be achieved by an environmentally friendly solid fuel produced by the above-described method of manufacturing a light-weight solid fuel.

The eco-friendly solid fuel produced by the method of the present invention is renewable energy using waste materials. In addition, when the environmentally friendly solid fuel is burned, the amount of harmful components such as carbon monoxide and carbon dioxide is significantly reduced as compared with the conventional briquettes. In particular, it does not produce carcinogens such as cadmium and arsenic. Accordingly, natural damage including air pollution can be minimized.

On the other hand, compared with conventional briquettes formed of conventional fossil fuels, the eco-friendly solid fuel of the present invention generates a sufficient amount of heat of 4800 kcal or more and can sufficiently serve as an alternative fuel. In addition, the conventional briquettes have a weight of 3.6 kg, whereas the eco-friendly solid fuel of the present invention has a weight of 1.5 kg, which is easy to carry and convenient to use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the analysis results of harmful components of conventional briquettes,
FIG. 2 is a flow chart showing a process for producing an environmentally friendly solid fuel of the present invention,
FIG. 3 is an illustration showing an environmentally friendly solid fuel produced by the process of manufacturing an environmentally friendly solid fuel of the present invention,
FIG. 4 is an experimental graph illustrating the strength of ash of the green solid fuel according to different fuel mixing ratios of the present invention,
FIG. 5 is a graph showing the results of measurement of the amount of carbon monoxide and carbon dioxide generated during the combustion of the environmentally friendly solid fuel of the present invention and conventional briquettes,
FIG. 6 is a chart showing analysis results of harmful components generated when the environmentally friendly solid fuel is burned according to the present invention. FIG.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 2 is a flow chart illustrating a process for manufacturing an environmentally friendly solid fuel according to the present invention, and FIG. 3 is an exemplary diagram illustrating an environmentally friendly solid fuel 100 manufactured by the process of manufacturing an environmentally friendly solid fuel of the present invention.

As shown in the drawing, the environmentally friendly solid fuel 100 according to the present invention is formed so that its external shape is the same as that of conventional briquettes. Accordingly, the environmentally friendly solid fuel 100 of the present invention can be used in a fireplace or an oven where conventional briquettes are used. 10 to 25 holes 120 may be formed on the surface of the fuel body 110 in consideration of the amount of heat generated during combustion and the combustion time.

The environmentally friendly solid fuel 100 is manufactured using a waste food material consisting of rice hull, oak sawdust, corn stand, rice straw, stick, peanut shell, and palm shell. The abolished materials are those that are consumed after a person eats food. Friendly eutectic solid fuel 100 according to the present invention by using abandoned waste materials, and thus can be environmentally friendly, sanitary, non-toxic and firepower.

Rice horses are the bark of rice, a by-product of rice paddy. Oakwood sawdust refers to powder that is washed away from the tree when oak wood is turned on or cut. It is a by-product that is discarded when cutting wood. The corn stand is a corn husk, and a wheat is a shell of wheat. Peanut shells and palm shells are peanuts and palm shells, respectively.

Rice hulls, oak sawdust, corn stalks, cornstalks, sticks, peanut hulls, and coconut shells are by-products that are discarded during processing, but most of the ingredients consist of fibers that can release a large amount of heat when burned.

Here, the byproducts forming the waste material are mixed at a constant ratio. That is, about 90% of the total waste materials are mixed with 90% of rice hull, 2.4% of oak sawdust, 2% of corn, 1.2% of rice husk, 1.2% of barley, 1.1% of stick, 1.1% of peanut husk and 1% of palm husk. This blend ratio is optimized for burning, which is higher than conventional briquettes.

For the production of the environmentally friendly solid fuel 100, the waste materials are stirred together according to the mixing ratio as shown in FIG. 2 and mixed well (S110). Here, each of the waste materials can be finely pulverized while stirring.

The waste materials mixed well are put into the compressor and pressurized (S120). Here, the compressor applies 90 to 100 tons of pressure to 1 kg of waste materials. And the moisture contained in the waste food material is discharged to the outside through the pressurizing process.

The pressurized waste food material is put into a heating pot and heated at a temperature of 400 to 600 degrees Celsius for 20 hours (S130). Then, water and gas generated in the process of stirring, compressing, and heating the hot rolled food material are removed using a cold air dryer (S140). When the removal of moisture and gas is completed, a primary molded char is formed in which the waste material is carbonized.

Silica, sodium chloride, starch and water are added to the primary shaped charcoal and stirred to form a fuel mixture (S150). Here, the silica has a melting point of 1200 ° C or higher and serves to pull around the material while melting. Sodium chloride plays a role in lowering the melting point of silica significantly. Starch and water act as the primary charcoal.

Since the silica does not dissolve at a temperature of 1200 DEG C or less, the strength of the ash of the solid fuel 100 is remarkably reduced and becomes 60 kgf or less, which is the reference strength of the briquette. If the sodium chloride is mixed together, the melting point of the silica can be lowered to 600 ° C, and the strength of the ash of the solid fuel 100 can be formed to be 60 kgf or more. Here, silica does not cause a chemical reaction upon combustion.

Here, it is preferable to mix 300 to 400 g of silica, 200 to 300 g of sodium chloride, 10 to 15 g of starch and 100 to 150 g of water per 1 kg of the primary shaped charcoal.

4 (a) is a graph showing the strength of the remaining material after burning the environmentally friendly solid fuel 100 produced by mixing silica, sodium chloride, starch, and water at different mixing ratios of the primary molded charcoal. 4 (b) is a chart showing the amount of silica, sodium chloride, starch, and water mixed corresponding to each experimental order.

Here, if the strength of the material remaining after the combustion of the fuel is 60 kgf or more, fine dust will not be blown.

The first test fuel is a mixture of 100 g of silica, 50 g of sodium chloride, 5 g of starch and 50 g of water in 1 kg of the primary molded charcoal. The secondary test fuel is a mixture of 200 g of silica, 100 g of sodium chloride, 7 g of starch and 70 g of water. The third test fuel is a mixture of 300 g of silica, 200 g of sodium chloride, 10 g of starch and 100 g of water. The fourth test fuel is a mixture of 400 g of silica, 300 g of sodium chloride, 15 g of starch and 150 g of water.

As shown in FIG. 4 (a), the strength of the primary test fuel is 30 kgf, the strength of the secondary test fuel is 60 kgf, the test fuel of the third test is 90 kgf, and the strength of the fourth test fuel is close to 100 kgf Able to know.

Accordingly, it is preferable to mix 300 to 400 g of silica, 200 to 300 g of sodium chloride, 10 to 15 g of starch, and 100 to 150 g of water to maintain the strength of the ash of 60 kgf or more.

When the fuel mixture is mixed, the fuel mixture is put into a compressor and pressurized to form a shape of briquettes (S160). The fuel mixture is injected into the mold of the briquetting shape and is molded by applying a pressure of 90 to 100 tons using a compressor. The fuel mixture thus formed is dried at room temperature (25 ° C, humidity 30% or less) for 6 hours to 12 hours to complete a solid fuel.

The solid fuel thus dried has a strength of 180 to 250 kgf and the strength of the ash after combustion is 60 kgf or more. If the strength of the solid fuel is 180 kgf or more, the combustion time can be delayed without burning all at once. On the other hand, if the strength of the solid fuel is 250 kgf or more, the combustion itself is not smooth.

FIG. 5 is a graph showing the results of an experiment in which the amount of carbon dioxide (CO ₂ ) and carbon monoxide (CO) generated during combustion of the conventional briquettes and the environmentally friendly solid fuel of the present invention are measured. The emission of carbon dioxide measured at 30 minutes after ignition of conventional briquettes is 932.5 and the emission amount of carbon monoxide is 91.71. On the other hand, the emission amount of carbon dioxide generated in the combustion of the environmentally friendly solid fuel of the present invention is 417.3, which is more than half that of the conventional briquettes. In addition, the amount of carbon monoxide emitted during burning of the environmentally friendly solid fuel of the present invention is also 10.68, which is lower than 1/9 of the conventional briquettes.

FIG. 6 is a result of analyzing harmful components generated when the environmentally friendly solid fuel is burned according to the present invention. Compared with the harmful substances generated in the combustion of the conventional briquettes of Fig. 1, they show a remarkable difference. The amount of lead generated was 26.62 ppm of briquettes, 1.55 of solid fuel, and no cadmium and arsenic were detected. It can also be seen that copper, chromium, and mercury are generated at significantly lower values than conventional briquettes.

As described above, the eco-friendly solid fuel produced by the method of manufacturing the environmentally friendly solid fuel of the present invention is renewable energy using the waste material. In addition, when the environmentally friendly solid fuel is burned, the amount of harmful components such as carbon monoxide and carbon dioxide is significantly reduced as compared with the conventional briquettes. In particular, it does not produce carcinogens such as cadmium and arsenic. Accordingly, natural damage including air pollution can be minimized.

On the other hand, compared with conventional briquettes formed of conventional fossil fuels, the environmentally-friendly solid fuel of the present invention generates sufficient heat of 5000 kcal / kg or more, and thus can sufficiently serve as an alternative fuel. In addition, the existing briquettes have a weight of 3.6 kg, whereas the environmentally friendly solid fuel of the present invention has a weight of 1.7 kg, which is easy to carry and convenient to use.

The method of manufacturing the environmentally friendly solid fuel of the present invention described above and the embodiment of the environmentally friendly solid fuel produced thereby are merely illustrative and those skilled in the art will appreciate that various modifications, It will be appreciated that other embodiments are possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: solid fuel 110: fuel body
120: hole

Claims (2)

Agitating a waste food material comprising a mixture of rice hulls, oak sawdust, cornstarch, rice straw, barley stand, wheat bran, peanut shell, and coconut shell;
Placing the agitated waste material in a compressor and pressurizing the waste material at a pressure of 90 to 100 tons;
Feeding the pressurized waste material into a heating pot and heating the mixture at a temperature of 400 to 600 DEG C for 20 hours;
Removing moisture and gas from the heated waste foodstuff to form a primary molded charcoal;
Adding silica, sodium chloride, starch, and water to the primary shaped charcoal and stirring to form a fuel mixture;
Compressing the fuel mixture at a pressure of 90 to 100 tons using a compressor and shaping the fuel mixture into a shape of a solid fuel;
Drying the solid fuel at room temperature for a certain period of time to complete an eco-friendly solid fuel having a strength of 180 kgf to 250 kgf before combustion and a strength of the ash after combustion of 60 kgf or more,
The waste materials were mixed with 90% of rice hull, 2.4% of oak sawdust, 2% of corn, 1.2% of rice husk, 1.2% of barley, 1.1% of stick, 1.1% of peanut husk and 1%
Wherein the fuel mixture is formed by mixing 300 g to 400 g of silica, 200 to 300 g of sodium chloride, 10 g to 15 g of starch, and 100 g to 250 g of rectified water to 1 kg of the primary molded charcoal.
An environmentally friendly solid fuel produced by the method of claim 1.

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