WO2016021787A1

WO2016021787A1 - Preparation method for environmentally-friendly solid fuel using waste food material and environmentally-friendly solid fuel prepared thereby

Info

Publication number: WO2016021787A1
Application number: PCT/KR2015/000182
Authority: WO
Inventors: 차예주
Original assignee: 마주현
Priority date: 2014-08-07
Filing date: 2015-01-08
Publication date: 2016-02-11
Also published as: KR101440758B1; CN105368519A; CN105368519B

Abstract

The present invention relates to a preparation method for an environmentally-friendly solid fuel comprising a step of stirring a waste food material mixed together with chaff, oak sawdust, corn stalk, rice straw, barley stalk, wheat stalk, peanut shells, and coconut shells; a step of putting the stirred waste food material into a compressor and pressurizing the same at a pressure of 90 to 100 tons; putting the pressurized waste food material into a heating pot, and heating the same at a temperature of 400 to 600℃ for 20 hours; a step of removing water and gases from the heated waste food material to thereby form a primary molded charcoal; a step of adding silica, sodium chloride, starch, and water to the primary molded charcoal and stirring the same to thereby form a fuel mixture; a step of pressurizing the fuel mixture by using the compressor at a pressure of 90 to 100 tons to thereby form the fuel mixture into the form of solid fuel; and a step of drying the solid fuel at room temperature for a certain period of time and completing the manufacture of an environmentally-friendly solid fuel having a strength of 180 kgf to 250 kgf before combustion and an ash strength of 60kgf or more after combustion, wherein the waste food material is mixed with 90% of chaff, 2.4% of oak sawdust, 2% of corn stalk, 1.2% of rice straw, 1.2% of barley stalk, 1.1% of wheat stalk, 1.1% of peanut shells, and 1% of coconut shells, and the fuel mixture is formed by mixing 300g to 400g of silica, 200 to 300g of sodium chloride, 10g to 15g of starch, and 100g to 250g of distilled water into 1kg of the primary molded charcoal.

Description

Eco-friendly solid fuel manufacturing method using waste food materials and eco-friendly solid fuel produced by it

The present invention relates to a method for producing an environmentally friendly solid fuel and an environmentally friendly solid fuel produced by the same, and more specifically, to a method for producing an environmentally friendly solid fuel that does not generate harmful substances using waste food materials discarded and an environmentally friendly solid produced by the same. It's about fuel.

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

Briquettes are manufactured by the "briquette manufacturing method" disclosed in Publication No. 1984-0003280. Since briquettes are usually manufactured using coal, which is a fossil fuel, harmful components are generated when the briquettes are burned.

1 is a chart showing the analysis results of harmful components generated during the combustion of briquettes. As shown in the diagram, briquettes emit significant amounts of harmful components such as lead, cadmium, copper, chromium, arsenic, and mercury, although they are lower than process standards. In particular, carbon monoxide and carbon dioxide are generated in large quantities, polluting the air, and generating carcinogens such as cadmium and arsenic have a harmful effect on the human body.

In addition, the briquettes remaining after combustion of the briquettes are scattered in the air and damage the nature including soil pollution. In this case, there is a problem in that treatment costs for separately processing the briquettes.

An object of the present invention is to solve the above problems, to provide a method for producing an environmentally friendly solid fuel harmless to humans and nature using waste food materials other than fossil fuel and the solid fuel produced thereby.

Another object of the present invention is to provide an affinity solid fuel production method and an affinity solid fuel produced thereby, which can solidify the ash remaining after combustion to have a certain strength or more to prevent fine dust from scattering in the air.

Still another object of the present invention is to provide an eco-friendly solid fuel manufacturing method capable of replacing fossil fuel by providing sufficient calorific value during combustion and an eco-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 an environmentally friendly solid fuel production method. Eco-friendly solid fuel production method of the present invention, the step of stirring together the waste food materials mixed with chaff, oak sawdust, corn bark, rice bark, barley bar, wheat bark, peanut shell, coconut shell; Putting the stirred food waste material into a compressor and pressurizing it to a pressure of 90 to 100 tons; Putting the pressurized waste foodstuffs into a heating cooker and heating at 400 to 600 ° C. for 20 hours; Removing moisture and gas from the heated waste food materials to form primary charcoal; Adding silica, sodium chloride, starch, and water to the primary molded charcoal to form a fuel mixture; Pressing the fuel mixture to a pressure of 90 to 100 tons using a compressor and molding 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 the eco-friendly solid fuel having a strength of 180kgf ~ 250kgf before combustion, the strength of the ash after combustion more than 60kgf, the waste food materials 90% chaff, oak sawdust 2.4%, Corn cob 2%, cress 1.2%, barley 1.2%, wheat straw 1.1%, peanut shell 1.1%, coconut shell 1%, the fuel mixture is 1kg of the primary shaping charcoal 300g ~ 400g, sodium chloride 200 ~ It is characterized by being formed by mixing 300g, starch 10g ~ 15g, 100g ~ 250g of rectified water.

The object of the present invention may be achieved by an environmentally friendly solid fuel produced by the above-mentioned method of preparing a friendly solid fuel.

Eco-friendly solid fuel manufactured by the eco-friendly solid fuel manufacturing method of the present invention is renewable energy using waste food materials. In addition, the amount of harmful components including carbon monoxide and carbon dioxide during combustion of environmentally friendly solid fuel is significantly reduced compared to 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 to the conventional briquettes formed of conventional fossil fuels, the eco-friendly solid fuel of the present invention may generate sufficient heat of 4800 kcal or more and may serve as a substitute fuel. In addition, while the existing coal briquettes are 3.6kg, the eco-friendly solid fuel of the present invention is 1.5kg, light in weight, easy to transport and convenient to use.

1 is a table showing the results of analyzing harmful components of the conventional briquettes,

2 is a flow chart showing an environmentally friendly solid fuel manufacturing process of the present invention,

3 is an exemplary view showing an eco-friendly solid fuel produced by an eco-friendly solid fuel manufacturing process of the present invention,

4 is an experimental graph of the strength of ash according to different fuel mixing ratios of the environment-friendly solid fuel of the present invention,

5 is an experimental result of measuring the amount of carbon monoxide and carbon dioxide generated during the combustion of environmentally friendly solid fuel and conventional briquettes of the present invention,

Figure 6 is a diagram showing the results of the analysis of harmful components generated during the combustion of environmentally friendly solid fuel of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

2 is a flowchart illustrating a process for producing an environmentally friendly solid fuel of the present invention, Figure 3 is an exemplary view showing an environmentally friendly solid fuel 100 produced by the process for producing an environment-friendly solid fuel of the present invention.

As shown, the environment-friendly solid fuel 100 according to the present invention is formed so that the external appearance is the same as the conventional briquettes. As a result, the environmentally friendly solid fuel 100 of the present invention may be used in a stove or an oven using a coal briquette. The eco-friendly solid fuel 100 may have 10 to 25 holes 120 formed on the surface of the fuel body 110 in consideration of heat generated during combustion and combustion time.

Eco-friendly solid fuel (100) is produced using waste food materials consisting of chaff, oak sawdust, corn stalks, crests, wheat straws, peanut shells, palm shells. Waste food is thrown away after a person eats food. Since the environmentally friendly solid fuel 100 of the present invention is formed using the discarded waste food materials, it may be environmentally friendly, hygienic, non-toxic and firepower can be strong.

Chaff means the skin of rice and is a by-product discarded when the rice is milled. Oak sawdust refers to powder that is swept out of a tree when it is turned on or cut, and is a by-product discarded when cutting timber. Corn stalks are the husks of corn, and wheat stalks are the husks of wheat. Peanut shells and coconut shells are the shells of peanuts and palm, respectively.

Chaff, oak sawdust, corn stalks, crests, wheat straws, peanut shells, and palm husks are by-products of processing, but most of the components are made of fiber that can release large amounts of heat during combustion.

Here, the by-products forming the waste food materials are mixed in a constant ratio. That is, the total weight of waste food ingredients is mixed with 90% chaff, 2.4% oak sawdust, 2% corn cob, 1.2% crested barley, 1.2% barley, 1.1% wheat, 1.1% peanut shell, and 1% coconut shell. This mixing ratio is an optimized value for releasing a high amount of heat during combustion compared to conventional briquettes.

In order to manufacture the eco-friendly solid fuel 100, the waste food materials are mixed together by mixing well according to the above mixing ratio as shown in FIG. 2 (S110). Here, each waste food material may be finely ground while stirring.

Put the waste food materials mixed well with each other and pressurized (S120). Here, the compressor is applied a pressure of 90 ~ 100ton for 1kg waste food materials. During the pressurization process, the moisture contained in the waste food materials is discharged to the outside.

Pressurized waste food materials are put into a heating cooker, and heated for 20 hours at a temperature of 400 ~ 600 degrees Celsius (S130). Then, the heated food waste material is removed using a cold air dryer to remove water and gas generated in the process of stirring, compression and heating (S140). When the removal of water and gas is completed, the first shaping charcoal carbonized waste food material is formed.

Silica, sodium chloride, starch, water is added to the primary molded charcoal to form a fuel mixture by stirring (S150). Here, silica has a melting point of more than 1200 ℃, serves to pull the surrounding material while melting. Sodium chloride significantly lowers the melting point of silica. Starch and water act to aggregate the primary shaping charcoal.

Since silica does not melt at 1200 ° C. or lower, the strength of the ash of the solid fuel 100 is remarkably dropped to 60 kgf or less, which is the reference strength of the briquettes. When the sodium chloride is mixed together, the melting point of the silica may be lowered to 600 ° C., thereby forming the ash strength of the solid fuel 100 at 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 starch, 10 to 15 g of starch, and 100 to 150 g of water with respect to 1 kg of primary molded charcoal.

Figure 4 (a) is a graph of the strength of the ash remaining after burning the environmentally friendly solid fuel (100) prepared by mixing the primary shaping charcoal, silica, sodium chloride, starch, water in different mixing ratios. FIG. 4B is a chart showing the mixing amounts of silica, sodium chloride, starch, and water corresponding to each experimental order.

Here, the fine ash is not blown only when the strength of the ash remaining after the combustion of the fuel is 60kgf or more.

The primary 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 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 (a) of FIG. 4, the primary test fuel has an ash strength of 30 kgf, the secondary test fuel has an ash strength of 60 kgf, the third test fuel is 90 kgf, and the fourth test fuel has an ash strength of 100 kgf. Able to know.

Accordingly, in order to maintain the strength of the ash to 60kgf or more, 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.

When the fuel mixture is mixed, the fuel mixture is put into a compressor and pressurized to form a briquette (S160). The fuel mixture is put into a briquette-shaped mold and 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 ~ 250kgf, the ash strength after combustion will also have more than 60kgf. When the strength of solid fuels is more than 180kgf, it can not burn at once and delay combustion time. On the other hand, if the strength of the solid fuel is more than 250kgf combustion itself is not smooth.

5 is an experimental result of measuring the amount of carbon dioxide (CO ₂ ) and carbon monoxide (CO) generated during the combustion of the conventional briquettes and environmentally friendly solid fuel of the present invention. The emission of carbon dioxide measured at 30 minutes after ignition of conventional briquettes is 932.5 and the emissions of carbon monoxide are 91.71. On the contrary, the carbon dioxide emissions generated during the combustion of the eco-friendly solid fuel of the present invention is 417.3, which is more than half lower than that of conventional briquettes. In addition, the emissions of carbon monoxide generated during the combustion of the environmentally friendly solid fuel of the present invention is 10.68, which is lower than 1/9 compared to conventional briquettes.

Figure 6 is a result of analyzing the harmful components generated during the combustion of the environmentally friendly solid fuel of the present invention. Compared with the harmful components generated during the combustion of the conventional briquettes of Figure 1, it shows a remarkable difference. The amount of lead generated was 26.62ppm, whereas solid fuel was 1.55 and cadmium and arsenic were not detected. In addition, it can be seen that copper, chromium, and mercury are also generated at a significantly lower level than conventional briquettes.

As described above, the eco-friendly solid fuel manufactured by the eco-friendly solid fuel manufacturing method of the present invention is renewable energy using waste food waste material. In addition, the amount of harmful components including carbon monoxide and carbon dioxide during combustion of environmentally friendly solid fuel is significantly reduced compared to 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, the environment-friendly solid fuel of the present invention as compared to the conventional briquettes formed of the existing fossil fuel can generate a sufficient amount of heat of 5000kcal / kg or more can play a role as an alternative fuel. In addition, while the existing coal briquettes are 3.6kg, the eco-friendly solid fuel of the present invention has a light weight of 1.7kg, which is easy to transport and convenient to use.

Eco-friendly solid fuel manufacturing method of the present invention described above and embodiments of the eco-friendly solid fuel produced by it is merely exemplary, and those skilled in the art to which the present invention pertains various modifications and equivalents therefrom It will be appreciated that other embodiments are possible. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

The present invention relates to an environmentally friendly solid fuel manufacturing method and an environmentally friendly solid fuel produced thereby, can be used in the solid fuel manufacturing industry.

Claims

Agitating together the waste foodstuffs mixed with chaff, oak sawdust, corn stalks, rice hulls, barley, wheat straw, peanut shells, and coconut shells;

Putting the stirred food waste material into a compressor and pressurizing it to a pressure of 90 to 100 tons;

Putting the pressurized waste foodstuffs into a heating cooker and heating at 400 to 600 ° C. for 20 hours;

Removing moisture and gas from the heated waste food materials to form primary charcoal;

Adding silica, sodium chloride, starch, and water to the primary molded charcoal to form a fuel mixture;

Pressing the fuel mixture to a pressure of 90 to 100 tons using a compressor and molding the fuel mixture into a shape of a solid fuel;

Drying the solid fuel at room temperature for a predetermined time, and completing the eco-friendly solid fuel having a strength of 180kgf ~ 250kgf before combustion and having the strength of the ash after combustion more than 60kgf,

The waste food material is mixed with 90% chaff, oak sawdust 2.4%, corn cob 2%, crest 1.2%, barley 1.2%, wheat straw 1.1%, peanut shell 1.1%, coconut shell 1%,

The fuel mixture is an eco-friendly solid fuel manufacturing method characterized in that formed by mixing 300g ~ 400g silica, 200 ~ 300g sodium starch, 10g ~ 15g, 100g ~ 250g of rectified water to 1kg of the primary molded charcoal.
Eco-friendly solid fuel produced by the method of manufacturing the eco-friendly solid fuel of claim 1.