KR20080042060A - Solid fuel manufacturing method using food waste - Google Patents

Abstract

A method for manufacturing a solid fuel using food waste is provided to prevent environmental pollution, utilize food waste as an alternative energy source that can replace with fossil fuels, manufacture the solid fuel environmentally friendly, greatly reduce the manufacturing cost, and prevent odor from being generated when manufacturing the solid fuel using food waste. A method for manufacturing a solid fuel using food waste comprises the steps of: collecting food waste and spraying ozone water onto the collected food waste to deodorize the food waste; injecting the deodorized food waste into a dryer and primarily drying the food waste at a temperature of 180 to 200 deg.C for 30 minutes to control a moisture content of the food waste to 10% or less; primarily crushing the dried food waste into pieces with a size of less than 5 mm through a crusher; secondly crushing the primarily crushed food waste into fine pieces with a size of not more than 2 mm; mixing the crushed food waste with an additive within a mixer at a mixing ratio of 47 to 60:40 to 53; injecting the mixture into a pellet extruder to extrusion mold the mixture; and secondly drying the extrusion molded article by indirect heat with a temperature of about 50 to 60 deg.C in a drying furnace.

Description

Solid fuel manufacturing method using food waste {omitted}

The present invention relates to a method for manufacturing solid fuel using food waste, and more specifically, to recycle food waste discharged from homes, apartments, restaurants, hotels, and the like. In the manufacturing method of solid fuel using food waste, it is possible to solve the environmental problems caused by food waste and to produce high-quality alternative energy by contributing to the extrusion and molding of the mixture by mixing the additives. It is about.

Food waste not only accounts for more than 30% of the total household waste, but also has a lot of water and is easily decomposed, which causes difficulties in landfilling and incineration.In 2005, the Waste Management Act banned direct landfilling and incinerated or recycled. In addition, various municipal governments have tried to recycle by introducing various treatment methods, but economical and mass treatment methods have not been developed.

Recycling of food waste is mainly composting, dry feed and liquid feed methods are developed and spread, but composting produces bad smell in manufacturing process, high salinity, low productivity and low economic efficiency. This overuse and limited use and liquid feed has problems with feed distribution and feed stability.

Accordingly, it has been possible to devise a solidification fuelization method that enables stable mass processing of food waste and increases added value as an alternative energy.

Food wastes contain more than 85% of moisture and are easily decayed and are difficult to recycle or have high calorie content.They have higher value as fuel than compost or feed. The problems shown can be solved at the same time.

In order to solve these problems, recently, various cases of fueling food wastes by simply crushing, dehydrating and forming them in order to recycle them as fuels have been published.

However, such technologies are difficult to commercialize as fuel due to the lack of food waste crushing and dehydration methods to ensure physical optimum conditions as fuels, mixing of fuel materials such as coal to secure homogeneous quality and high calorific value, and forming and drying technologies. There is a situation.

In addition, a conventional method for producing solid fuel using general waste, the step of supplying household waste to the input unit, separating the iron from the domestic waste in the input unit using an electromagnet, the iron metal separated life using a crusher Sequentially crushing the waste, heating and compressing the crushed household waste using a heating compressor to equalize the moisture content of the living waste, sequentially crushing the domestic waste with a uniform water content, and then crushed again Finely cutting the household waste by the scattering rotary dryer and the scattering assembly, and simultaneously drying, adding a neutralizing agent to the cut and dried household waste, and heating and compressing the household waste mixed with the neutralizing agent to have a predetermined shape. The shaping of the solid fuel is made 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, it is possible to prevent environmental pollution and to replace the fossil fuel as an energy source that can be used to produce a solid fuel using food waste for food waste To provide.

It is another object of the present invention to provide a method for producing solid fuel using food waste which is environmentally friendly and can greatly reduce manufacturing costs by establishing an efficient and economical method for treating food waste, and when manufacturing solid fuel using food waste. It is to prevent the occurrence of odor generated.

Solution to Problem The present invention for solving the problems as described above is to remove the odor generated in the food waste when the food waste is put in the storage hopper in the food waste collection truck, ozone water generator in the form of mist It is characterized by being able to treat the food waste process in a more sanitary environment than the conventional process by spraying the first to remove the smell of food waste.

In addition, the clay, dolomite, and petroleum powder are mixed with the food waste crushed and the additives which are crushed again after the first drying in a ratio of 47 to 60: 40 to 53 so as to prevent the smell of food waste generated during the combustion of solid fuel. And the like, and in particular, the addition of coke and pits is characterized by the addition of coarse soil containing neutralized carbon monoxide gas, which neutralizes carbon monoxide gas generated during combustion, to be harmless to the human body.

In addition, by using natural substances that improve the soil environment such as ocher, pit, humic acid and rosin as solid fuel additives, the by-products left after using solid fuel are harmless to the soil even when used as compost.

As mentioned above, according to the present invention, by producing solid fuel using food waste as a main raw material, it is possible to treat environmentally friendly food waste, which facilitates mass processing, and is a fuel having high calorific value with economical efficiency. And vegetable fueling boilers, domestic boilers, various industrial solid fuel boilers, cogeneration or solid fuel alternatives to thermal power plants.

In addition, the solid fuel according to the manufacturing method of the present invention is characterized in that there is no fear of odor or air pollution even during combustion, and natural by-products can be used as compost again, contributing to effective waste treatment, resource conservation, environmental conservation, energy policy, etc. It can be.

In order to achieve the above object, the present invention comprises the steps of collecting the food waste to spray the ozone water to deodorize the smell; Selecting by a selector; Firstly drying the deodorized food waste into a dryer for 30 minutes at a temperature of 180 to 200 ° C. such that the water content is 10% or less; Crushing the dried food waste to within 5 mm through a crusher; Finely crushing the dried material to 2 mm or less; Mixing the food waste shreds and the additives in a mixer at a ratio of 47 to 60:40 to 53; Inserting the mixed mixture into a pellet extruder and extruding the mixture; Secondary drying the extruded product in an indirect heat of about 50-60 ° C. in a drying furnace.

In addition, the blending ratio is described in detail in the step of mixing the food waste crushed matter and the additive at a ratio of 47 to 60:40 to 53, as described in the above [Table 1].

Table 1

In addition, the mixing ratio of the food waste shreds and additives may be added or added slightly differently depending on the type of food waste and use.

In addition, Figure 1 is a flow chart illustrating a manufacturing process of a solid fuel using the food waste according to the present invention, with reference to Figure 1 described in more detail step by step for the manufacturing method of the solid fuel according to the present invention. same.

First, when food waste is put into a storage hopper in a food waste collection truck, the ozone water generator sprays ozone water in the form of a mist, which removes the smell of food waste generated in the workplace and removes the waste of food waste. Make the environment more hygienic than the process.

Food waste loaded on the hopper is deodorized and sterilized by the sprayed ozone water, which exhibits the unique sterilization and deodorization effect of ozone, and has no residual like the existing disinfectants. Gives.

Next, various kinds of foreign substances other than foods such as vinyls, ferrous metals, and non-ferrous metals containing deodorized food wastes are removed by a sorting machine, and then the deodorized food wastes are put into a dryer so that the moisture content is 10% or less. First drying for 30 minutes at a temperature of 180 ~ 200 ℃.

The first dried food waste is crushed, firstly crushed to within 5 mm, and then secondly crushed to within 2 mm. The crushed food waste crushed material is put into a separate mixer and is added to the additive and 47 to 60. It is mixed in the ratio of 40-53.

The mixture thus mixed is extruded into a pellet extruder, and the shape may be produced as 22 coke, briquettes, lignite, or the like.

Finally, the extruded product is put into a drying furnace and secondly dried by indirect heat of about 50 to 60 ° C.

And each of the additives described in detail, the loess of the additive contains a component such as magnesium, calcium, potassium carbonate, aluminum, etc., the mainstream of the silica is to increase the affinity of the food waste shreds and other additives, solid About 200 million microorganisms per gram of loess, such as Schivose bacteria, which neutralize carbon monoxide generated during fuel combustion, prevent odors.

Dolomite also belongs to the hexagonal system (hexagonal system), the chemical composition is CaMg (CO ₃ ) ₂ , has a component between the limestone and magnesite, and lime carbonate and magnesium carbonate 1: 1 constitute bicarbonate. Amorphous, uniform structure and not broken when fired, so it is used for refractory, construction, high-grade lime fertilizer, fats and oils, steelmaking, steel furnace, dolomite plaster, magnesia clinker, etc. do.

Cokes have a high calorific value of 6,000 to 7,500 kcal / kg, mainly composed of fixed carbon.

In addition, when explaining the petrified powder, oyster shell, the main component is calcium, which is used as a calcium nutrient raw material, and also contains copper, iodine, silicic acid, vitamin A, and the like.

Also, peat is also called peat or peat, and woody fluids such as moss, reeds and sedges, sometimes pine and birch, are thickly deposited in the basin to undergo biochemical changes such as fungus in the presence of water. It is an organic fuel composed of decomposed and denatured substances, and lignin and cellulose, which are main components of plants, are mainly decomposed at the surface, and it is also used as a culture soil in the horticulture industry. Burning easily.

In addition, rosin is used to polish or produce a lot of products. When it is warm, it is sticky and smells like pine. Rubber rosin is the remainder of distilled oleoresin of pine and the component volatilized when distilled is terpentin, and is used in the present invention as a desiccant, adhesive, and complexing agent.

Humic acid is a naturally corroded substance formed by decomposition and polymerization of plants that have been deposited for a long time in a cold swamp over a long period of time. 50 to 60% carbon, 30 to 35% oxygen, and 3 to 5 hydrogen. %, Nitrogen 1.5-6%, Sulfur 1%, Ash 1%, etc. It is excellent in improving the physical and chemical structure of the soil and the plant growth environment.It is also effective in improving the quality of effluent (leachate) water and waste treatment. There is this.

The caking agent acts as a binder to bind dry food waste debris and prevents separation of solid and liquid components. In the present invention, lime and liquid silicate are used to minimize soil contamination and to utilize better solid fuel by-products. Used.

The main characteristic of the food waste solid fuel produced in this way is that the calorific value of fuel is more than 3,500 kcal / kg, and the high heat and combustion duration time over 400 ℃ lasts more than 2 hours per kilogram, so it is fully functional as an alternative fuel. No smoke, no air pollution.

1 is a flow chart illustrating a manufacturing process of a solid fuel using food waste according to the present invention.

Claims (1)

Collecting food waste and spraying ozone water to deodorize odors; Firstly drying the deodorized food waste into a dryer for 30 minutes at a temperature of 180 to 200 ° C. such that the water content is 10% or less; Crushing the dried food waste to within 5 mm through a crusher; Finely crushing the dried material to 2 mm or less; Mixing the food waste shreds and the additives in a mixer at a ratio of 47 to 60:40 to 53; Inserting the mixed mixture into a pellet extruder and extruding the mixture; Method for producing a solid fuel using food waste, comprising the step of secondary drying the extruded product in an indirect heat of about 50 ~ 60 ℃ in a drying furnace.

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