KR20000012514A - method for manufacturing solid fuel by using food garbage - Google Patents

Abstract

PURPOSE: The production method for a solid fuel is provided which prevents environment contamination from garbage and functions as a substitution fuel to replace a fossil. CONSTITUTION: A solid fuel using food garbage is produced by the following steps. Food garbage are stored in a storage chamber and transfer garbage. Remove extraneous matters except food from the transferred garbage. Crush food garbage without extraneous matters and dehydrate them. Input an antiseptic into them. Dry them and cast them into small uniform statue with compressing. Then solid fuel is prepared. This method aims at supplying environment affinitive and cost-effective garbage treatment.

Description

Method for manufacturing solid fuel by using food garbage}

The present invention relates to a method for producing solid fuel using food waste, and more particularly, by manufacturing food waste as a solid fuel, it is possible to prevent environmental pollution caused by food waste and to produce a substitute fuel that can replace fossil fuel. The present invention relates to a method for producing a solid fuel using food waste which can reduce the production cost of the solid fuel.

In general, the annual amount of garbage generated in our country is about 20 million tons. The amount of food waste generated during the year amounted to about 5.5 million tons in 1997, and the average daily discharge amounted to 15,075 tons, accounting for 28% of the total waste generated.

As a method of treating food waste, there is a method of incineration in an incinerator, a method of landfilling a natural site by fermentation, and recycling the feed or compost.

In the case of incineration of food waste, the construction of combustible waste incinerators and large incinerators takes a long time, and incineration of harmful substances such as dioxin and odors caused by incineration causes damage to residents. It is true. In addition, the use of relatively expensive oil, such as light oil, to incinerate the food waste, there is also a disadvantage that takes a lot of food waste disposal costs.

In Korea, 95% of food waste is reclaimed and only 316 tons of food waste is recycled as feed or fertilizer.

However, when the food waste is buried, leachate is generated from the food waste, the soil is contaminated, and the ground is subsided. In addition, in the situation where the NIMBY (not in my backyard) phenomenon is spreading, it is difficult to secure a landfill because residents oppose the installation of a landfill which is a polluting facility.

The method of using food waste as feed or compost is difficult to thoroughly sterilize, maintain freshness, and remove foreign substances. Among them, the removal of salt (NaCl) contained in food waste, in particular, is considered the most difficult challenge.

In order to feed or fertilize the food waste, it is essential to first ferment the food waste. Fermentation refers to a phenomenon in which organic matter is decomposed or oxidized / reduced into alcohol or carbon dioxide by the action of microorganisms such as yeast, bacteria and mold, and food waste is decomposed by the action of microorganisms. .

In Korea, since a relatively large amount of salt is used in the food cooking process compared to other countries, the food waste contains a large amount of salt. Salt is a component that must be removed to manufacture feed and fertilizers, and it is a fact that it acts as a major factor in the failure of feed and fertilization of food waste in Korea. Therefore, at present, the method of feeding and fertilizing food waste is very locally adopted among all food waste treatment methods.

In addition, a conventional method for producing a solid fuel using general waste, supplying household waste to the input unit, separating the iron from the domestic waste in the input unit by using an electromagnet, the iron metal is separated using a crusher Crushing the wastes sequentially, heating and compressing the crushed household wastes using a heating compressor to uniform the water content of household wastes, crushing the household wastes with a uniform water content in sequence, and crushing the living again The waste is finely cut and dried by a scattering rotary dryer and a scattering assembly, a neutralizer is added to the cut and dried household waste, and the household waste mixed with the neutralizing agent is heated and compressed to obtain a solid having a predetermined shape. The forming with fuel is configured in such a way that they are sequentially connected.

However, since the equipment used in the above-mentioned general waste solid fuel manufacturing method is composed of relatively expensive equipment, there is a problem that the manufacturing cost of the solid fuel is high.

Accordingly, an object of the present invention is to solve the above problems, by producing food waste as a solid fuel, it is possible to prevent the environmental pollution caused by food waste and to produce a substitute fuel that can replace fossil fuels It is to provide a solid fuel manufacturing method using food waste.

In addition, it is another object of the present invention to provide a food waste treatment method that is environmentally friendly and can reduce manufacturing costs.

It is still another object of the present invention to provide a waste disposal method capable of treating waste in which food waste and general waste having a moisture content below a predetermined ratio are mixed.

1-a flow chart showing a method for producing a solid fuel using food waste according to the present invention.

In order to achieve the above object, a solid fuel manufacturing method using food waste according to the present invention, the first step of storing the food waste in the storage chamber; A second step of transporting the naturally dehydrated food waste; A third step of removing foreign substances other than food from the food waste to be transported; A fourth step of crushing and dehydrating food waste from which foreign matters have been removed; A fifth step of adding an anti-corruption agent to the dehydrated food waste; A sixth step of drying food waste; And a seventh step of forming the solid fuel by compression molding the dried food waste into a predetermined shape.

Here, in the sixth step, the food waste may be heated to dry using solid fuel as a heat source, or may be heat dried using solid fuel made of general waste as a heat source. In addition, in the third step, it is easy and preferable that the food waste passes through the sorting screen of the mesh type so that foreign matters other than the food are filtered through the sorting screen.

In addition, the solid fuel manufacturing method using food waste according to the present invention, the first step of storing the food waste in the storage chamber; A second step of transporting the naturally dehydrated food waste; A third step of removing foreign substances other than food from the food waste to be transported; A fourth step of crushing and dehydrating food waste from which foreign matters have been removed; A fifth step of adding an anti-corruption agent to the dehydrated food waste; A sixth step of forming solid fuel by compression molding food waste into a predetermined shape; And a seventh step of drying and completing the molded solid fuel.

In addition, the waste disposal method according to the present invention comprises a first step of storing waste in a storage chamber in which the general waste and food waste are mixed and the water content is less than a predetermined ratio; A second step of transporting garbage; A third step of crushing and dehydrating the waste; A fourth step of introducing an anti-corruption agent to the dehydrated garbage; A fifth step of drying the garbage; And a sixth step of forming the solid fuel by compression molding the dried waste into a predetermined shape. The waste disposal method proposes a method for treating wastes in which general waste and food waste are mixed below a predetermined ratio.

Accordingly, by preparing food waste as a solid fuel, it is possible to prevent environmental pollution by food waste and to produce alternative fuels that can replace fossil fuels. In particular, by providing an environmentally friendly food waste treatment method, it is possible to effectively treat food waste that is the main culprit of environmental destruction. In addition, since the equipment cost of the food waste manufacturing process is relatively cheaper than the general waste solid fuel manufacturing equipment cost, the manufacturing cost of the solid fuel can be reduced.

With reference to the accompanying drawings will be described in more detail a solid fuel production method using food waste according to the present invention.

Solid fuel production method using food waste according to the present invention consists of a process of crushing / dehydrating food waste to dry and shape.

1 is a flow chart illustrating a method of manufacturing a solid fuel using food waste according to the present invention. As shown in this figure, the first step of the solid fuel manufacturing method is a step of receiving food waste in a storage hopper serving as a storage chamber (S1). The bottom of the storage hopper has a plurality of leaking through-holes, so that the water that is stored in the food waste stored in the storage hopper is naturally dehydrated by gravity.

Naturally dehydrated food waste is conveyed to a later process through a conveyor conveying device (S2). The transported food waste is subjected to a process of removing foreign matter other than food (S3). In other words, the food waste passes through the mesh-type sorting screen so that foreign matter other than food is filtered through the sorting screen.

Next, a process of crushing and dehydrating food waste from which foreign substances have been removed is performed (S4). In this process, food waste is cut into a certain amount to reduce the volume, and water is removed to homogenize the food waste.

After the food waste is crushed and dehydrated, a process of adding an anti-corruption agent to the food waste is performed (S5). Here, as well as anti-corruption deodorant may be added together.

Food waste into which anti-corruption and deodorant is put goes through a drying process (S6). In the drying process, a drying boiler is employed, and as the heat source of the drying boiler, a solid fuel made of food waste, which is the final product of the present embodiment, may be used, or a solid fuel made of general waste may be used as a heat source.

The dried food waste is compression molded into a predetermined shape to complete the solid fuel (S7). The deodorant for removing odor is added to the finished solid fuel (S8). The solid fuel made of food waste by the above process, that is, RDF (refuse derived fuel) has been experimentally confirmed several times to generate calories of about 1500 cal / kg to 2000 cal / kg.

As described above, by manufacturing the food waste as a solid fuel, it is possible to prevent environmental pollution by food waste and to replace the fossil fuel can be made. In particular, by providing an environmentally friendly food waste treatment method, it is possible to effectively treat food waste, which is the main culprit of environmental destruction. In addition, since the equipment cost of the food waste manufacturing process is relatively cheaper than the general waste solid fuel manufacturing equipment cost, the manufacturing cost of the solid fuel can be reduced.

Meanwhile, in the above-described embodiment, the food waste is described as being compressed after drying. However, as another embodiment of the present invention, the drying process may be performed after the compression molding process is preceded.

That is, the solid fuel manufacturing method of the present embodiment includes a first step of storing food waste in a storage chamber; A second step of transporting the naturally dehydrated food waste; A third step of removing foreign substances other than food from the food waste to be transported; A fourth step of crushing and dehydrating food waste from which foreign matters have been removed; A fifth step of adding an anti-corruption agent to the dehydrated food waste; A sixth step of forming solid fuel by compression molding food waste into a predetermined shape; And a seventh step of drying and molding the molded solid fuel.

Since the fifth step of the manufacturing process of this embodiment is made in the same process sequence as the above-described embodiment, and the process sequence of the sixth and seventh steps is different from the above-described embodiment, detailed description of the process will be omitted. Shall be.

As a result, according to the above-described manufacturing method, an environmentally friendly and low-cost manufacturing method of solid fuel can be realized, and food waste can be recycled without being embedded, thereby making a significant contribution to fuel production.

On the other hand, in the above-described embodiment, by producing a solid fuel using only the food waste, it has been described that the food waste is properly processed and the solid fuel is produced.

In addition, in the present invention, not only food waste but also general waste except food waste can be collected and used as a raw material of solid fuel.

That is, by collecting the garbage mixed with the general waste and food waste, it is also possible to produce a solid fuel through the manufacturing process of the above-described embodiments. At this time, it is experimentally proved that the solid fuel can be made by the above-described manufacturing process when the ratio of containing water of the waste mixed with the general waste and the food waste becomes less than a predetermined ratio.

Therefore, according to the solid fuel production method using the food waste according to the present invention, by manufacturing the food waste as a solid fuel, it is possible to prevent environmental pollution by food waste and to produce a substitute fuel that can replace fossil fuel The effect can be obtained.

In addition, an environmentally friendly food waste treatment method can be implemented, and when manufacturing solid fuel using food waste and general waste, it is also possible to obtain an effect that the manufacturing cost can be reduced.

Claims (6)

A first step of storing food waste in a storage chamber; A second step of transporting the food waste; A third step of removing foreign matter other than food from the food waste being transported; A fourth step of crushing and dehydrating the food waste from which foreign substances have been removed; A fifth step of adding an anti-corruption agent to the dehydrated food waste; A sixth step of drying the food waste; And And a seventh step of completing the solid fuel by compression molding the dried food waste into a predetermined shape. The method of claim 1, wherein in the sixth step, the food waste is heat-dried using the solid fuel as a heat source. The method of claim 1, wherein in the sixth step, the food waste is heat-dried using solid fuel made of general waste as a heat source. [4] The solid according to any one of claims 1 to 3, wherein, in the third step, the food waste passes through a mesh-type sorting screen so that foreign matter other than food is filtered through the sorting screen. Fuel manufacturing method. A first step of storing food waste in a storage chamber; A second step of conveying the naturally dehydrated food waste; A third step of removing foreign matter other than food from the food waste being transported; A fourth step of crushing and dehydrating the food waste from which foreign substances have been removed; A fifth step of adding an anti-corruption agent to the dehydrated food waste; A sixth step of forming a solid fuel by compression molding the food waste into a predetermined shape; And Solid fuel manufacturing method using a food waste, characterized in that it comprises a seventh step of drying the molded solid fuel is completed. A first step of storing waste in a storage chamber in which general waste and food waste are mixed and water content is less than a predetermined ratio; A second step of transporting the garbage; A third step of crushing and dehydrating the waste; A fourth step of introducing an anticorruption agent to the dehydrated garbage; A fifth step of drying the garbage; And And a sixth step of compressing the dried waste into a predetermined shape to complete a solid fuel.