KR20160097939A - Method of manufacturing low-carbon environment-friendly biomass solid fuel using food garbage - Google Patents

Abstract

The present invention relates to a manufacturing method of a low carbon eco-friendly biomass solid fuel using food waste. More particularly, the manufacturing method of a low carbon eco-friendly biomass solid fuel using food waste comprises the steps of: drying food waste which contains wastewater; injecting the resultant product into a mixing tank; deodorizing, neutralizing, and drying the resultant product through a physicochemical method; making the resultant product into a powder; and manufacturing a solid fuel by mixing the powder, a powder of a dried herbaceous plant, nappy wastepaper, coffee grounds, and a binder while having the powder obtained from the previous step as a main raw material. The manufactured solid fuel has low costs and can provide a high calorific value in comparison to a fossil fuel or a wood based fuel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a low-carbon environmentally friendly biomass solid fuel using food waste,

The present invention relates to a method for producing a biomass solid fuel by drying food waste and pulverizing it into a powder, and more particularly, to a method for producing a biomass solid fuel by pulverizing food wastes, And the dried garbage is dried by using a separator to remove substances which are harmful to the environment and foreign substances which are not suitable for combustion and then powdered, and the powder is used as a main raw material and dried powder of herbaceous plant The present invention relates to a method for producing a low-carbon eco-friendly biomass solid fuel using food wastes, which are obtained by mixing napped waste paper, coffee grounds, binders and the like to obtain fossil fuels or cheaper solid fuel than the neck solid fuels.

The term "new energy" as defined in Article 2, Paragraph 1 of the "New Energy and Renewable Energy Promotion Act" refers to the conversion of existing fossil fuels or the conversion of electricity or heat through chemical reactions such as hydrogen and oxygen. The energy used is hydrogen energy, fuel cell, energy obtained by liquefying and gasifying coal, gasifying heavy residue oil, and energy other than petroleum, coal, nuclear energy or natural gas.

The term "renewable energy" as defined in Article 2 of the same Act means the energy used to convert and use renewable energy including sunlight, water, geothermal, precipitation and biological organisms. Bio-energy to convert and use ".

In the above, bio-energy refers to energy of chemical, biological, and fuel engineering that uses physical conversion to photosynthesis of plants and microorganisms receiving solar energy.

Generally, the fuel as bio-energy is produced by extracting sugar from plant herbs such as rice straw, rice husks, cornstalks, soybean stalks and pine needles, which are wastes of crops, and then fermenting the sugar to produce alcohol, And methane is produced by decomposition.

Recently, organic wastes such as methane gas and food waste, which are produced at landfills of household garbage, are also utilized as bio energy resources.

Therefore, countries around the world are suffering from many difficulties due to lack of appropriate treatment after collecting food waste, and a lot of research is being carried out to utilize food waste as fuel.

That is, there is known a method (for example, Patent Documents 1 and 2) of producing solid fuel by crushing and dehydrating food waste from which foreign substances have been removed, and adding a decaying agent or an ignition accelerator to compress and solidify the food waste.

However, in the solid fuel manufacturing method using food waste as the main raw material as described in Patent Documents 1 and 2, there is a serious problem of waste water treatment in the process of dewatering the waste water from the food waste, and the price of the additive added to the food waste But it is difficult to activate because it is expensive and environmentally friendly.

Further, the applicant of the present invention has proposed an eco-friendly solid fuel by mixing an herbaceous powder as a waste resource with an additive to a foliar waste paper, and a method for producing the same as described in Korean Patent No. 10-1308869 (Patent Document 3) I received the registration (Notice date: 2013.09.16)

"Fractionation and Powder Process of Rice Straw with Three Drying and Powdering of Dried Rice Straw:

Disintegrating and pulverizing waste paper and pulverizing waste paper to make lint on the surface of pulverized waste paper:

A mixing process of adding cottonseed oil, oleic acid, stearic acid, and hydroxyethylcellulose to 500-1,000 parts by weight of rice straw powder having a size of 80 to 200 mesh and 300-1,000 parts by weight of a waste paper having a surface fleece, and a kneading process of kneading with a kneader:

A molding process for molding the dough material having the dough into a predetermined shape using a compressor while passing through the dough process; and

A method of manufacturing a solid fuel by transferring a material molded in the predetermined shape to a dryer "is an environmentally friendly method and has a high heating value. However, the price of herbal-based powder and waste paper, such as dried rice straw as a main raw material, And the economic effect is not excellent.

Accordingly, Applicants hereby acknowledge that, "A method for pulverizing fermented food waste and a method for producing an environmentally friendly biomass solid fuel using the same (hereinafter referred to as" Prior invention ") has been filed.

The above-mentioned invention of the prior application collects food waste from a group housing such as an apartment house, a restaurant, a school, and the like, and removes foreign materials such as vinegar, synthetic resin, clam, , Food wastes that have not been wastewater-free are supplemented with water to feed food sludge having a moisture content of about 40-45% into a microorganism tank and added with an appropriate amount of fermentation agent to ferment the fermented food sludge Powdering process of food sludge;

Herbaceous fibrillation and pulverization processes of collecting and pulverizing herbaceous crop wastes such as rice straw, straw, etc .;

Scrapping and crushing process for crushing waste paper, waste box, and crushing:

Ammonium phosphate, ammonium phosphate, ammonium ammonium phosphate, a-amylase, diesel oil, acetoacetone cobalt (III), and ammonium acetate are added to the pulverized food waste sludge powder obtained in the above pulverizing step, Mixing process of adding polyethylene oxide, cycloamylose and kneading with a kneader:

A molding process for molding the kneaded material having the dough into a predetermined shape using a compressor while passing through the kneading process, and

And a drying step of transferring the molded material to the dryer to obtain an end product of the biomass solid fuel.

According to the above-described invention of the present invention, a method for pulverizing fermented food waste and a method for producing an environmentally friendly biomass solid fuel using the fermented pulp as a main raw material is characterized in that the waste water is not dehydrated separately from the food waste, In order to energize the salt contained in the food sludge by burning the supplied food sludge by fermenting the microorganism by biochemical method and powdering it as the main raw material and to prevent the harmful substance such as carcinogenic substances from being emitted at all, The powder and the cotton-like fluffy waste paper are mixed together to produce a solid fuel, so that the remaining material after combustion can be utilized as fertilizer, thereby contributing greatly to the national energy industry.

In addition, the solid fuel obtained in the above-mentioned invention is eco-friendly, and its production cost is very low compared to pellets made mainly of fossil fuel and other wood flour.

However, the above-mentioned invention has a problem in that a lot of complaints are generated from residents near the treatment site due to odors generated in various processes for treating food waste containing ozone / wastewater.

(Patent Document 1) Japanese Patent Application Laid-Open No. 2000-0012514

  "Method of manufacturing solid fuel using food waste"

(Patent Document 2) Published Japanese Patent Application No. 10-2004-0079227

  "Solid Fuel Production Process Using Food Waste"

(Patent Document 3) Japanese Patent No. 10-1308869

  "Environmentally friendly herb base powder and lint

Solid fuels and methods of making same "

It is an object of the present invention to provide a method for producing a low-carbon eco-friendly biomass solid fuel using food waste which is cheaper than fossil fuel or wood based solid fuel and can obtain a high calorific value.

The object of the present invention is to provide a food waste disposal apparatus and a waste disposal method in which food wastes which have not been treated with waste water are put into a drying tank and then mixed with a certain amount of deodorant, neutralizing agent and evaporating agent are introduced into a drying tank The water contained in the food waste is evaporated and dried while stirring, and foreign substances such as vines, synthetic resins, shells, metals, animal bones, etc., which are harmful to the environment from the concentrated food wastes and obstruct combustion, are removed from the separator, Powder;

Apart from the above-mentioned processes, crops and pulverization processes of herbaceous plants such as rice straw and the like, which crop and pulverize herbaceous plants,

Waste paper, crushing and linting processes to truncate the waste box and lint in the form of cotton;

200-250 parts by weight of an herbal powder of about 100-200 mesh, 200-250 parts by weight of a waste paper laid in the form of cotton in the 1,500-2,000 parts by weight of food sludge powder of about 100-200 mesh obtained in the above step, And 10 to 30 parts by weight of the mixture were charged into a stirring tank having a lid opened and a stirring blade rotating at a low speed and stirred, and then tridecyl alcohol (Copper Chlorophyll, chlorophyll), sorbitol (D-Sorbitol; C ₆ H ₁₄ O ₆ ], Ethanolamine (H ₂ NCH ₂ CH ₂ OH), Whale oil, Tetra-n-butoxytitanium; _{Ti (OC 4 H 9) 4} ], poly (vinyl alcohol) [Polyvinylalkohol; (CH ₂ CHOH) n] and a kneading process; And

The method of manufacturing a low-carbon eco-friendly biomass solid fuel using food wastes, which comprises a step of forming and kneading a dough made through a mixing process and a kneading process into a predetermined shape using a conventional compressor have.

The method of manufacturing environmentally friendly biomass solid fuel using food wastes according to the present invention is characterized in that the waste water, which is the biggest problem in the treatment of food waste, is not dewatered separately and is dried by using a stirring blade in a drying tank in which the lid is opened. It is harmful to the environment when it is removed by using a separator because the deodorant, neutralizing agent and evaporator which are harmless to the environment are mixed together to neutralize the salt contained in the food garbage and evaporate and dry and concentrate the food waste. It is easy and easy to remove the foreign substance which is obstructed by the foreign matter.

In other words, food waste has a large amount of offensive odor and a large amount of waste water is mixed. Therefore, it is not easy to remove foreign matter in a wet state. However, as in the present invention, food waste is mixed with deodorant, neutralizer and evaporator, When stirring is carried out in an open drying tank through agitation, the salt is neutralized and evaporated, so that the operation of the dried and concentrated food wastes can be smoothly and easily performed when the foreign matter is removed from the sorter.

The dried and concentrated food waste obtained in the above process is pulverized, the powder of the herbaceous plant and the waste paper in the form of cotton are put into a stirrer and stirred, and the kneaded product in which the binder is added in the kneading process is compressed by a compressor The biomass solid fuel produced will contribute greatly to the low-carbon green energy industry.

In other words, in Korea, 4.48 million tons of food waste is abandoned without being used. If the biomass solid fuel is used as waste fuel, it is used as a fuel resource. Therefore, it is necessary to use existing tree or herbaceous plant as main material The pellets can be manufactured at a much lower cost than the pellets produced by the present invention. Therefore, the present invention is an invention that contributes greatly to the improvement of the environment since no economic effect and harmful substances are generated at all.

1 is a view showing a manufacturing process of the first embodiment of the present invention
2 is a view showing a manufacturing process of the second embodiment of the present invention
Fig. 3 is a photograph showing the lint-like appearance of lint-like fuzz on the surface of waste paper
4 is a photograph showing the solid fuel (pellet) produced by the process of the present invention

Step 1: Drying of Food Waste

5,000 to 7,000 parts by weight of food wastes which have not been removed from waste water and foreign matter are introduced into a drying tank in which an upper lid is opened and a stirring wing is rotated at a low speed in the main body, 80 to 250 parts by weight of tridecyl alcohol, 70 to 70 parts by weight of sorbitol, 150 to 200 parts by weight of sorbitol and 200 to 300 parts by weight of ethanolamine are added to the mixture, stirring is carried out for 5 to 7 hours using a stirring blade while maintaining the temperature in the drying tank at about 60 to 65 DEG C, As the salt and sodium components are neutralized, the food waste is dried and concentrated.

Step 2: Process of removing foreign matter from dried and concentrated food wastes

The food wastes dried and concentrated in the first step are removed by using a separator to remove foreign matter such as vines, synthetic resins, shells, metals, animal bones, leather, etc., which are harmful to the environment, 1,500 to 2,200 parts by weight of sludge are obtained.

Step 3: Process for powdering the food sludge with foreign substances removed

In the second step, the food sludge from which the foreign substance is removed is pulverized to about 100 to 200 mesh.

In this case, the total amount of powdered food waste is reduced to 1,500 to 2,200 parts by weight because the moisture contained in the drying operation of the food waste is evaporated, and the foreign material such as food waste is removed.

Step 4: stirring and kneading process

1,500 to 2,000 parts by weight of the powder of the food sludge obtained in the third step, 200-250 parts by weight of herbal powder, 200-250 parts by weight of the ground paper in the form of cotton, and 10-30 parts by weight of the coffee grounds are stirred in a stirring tank 55 to 75 parts by weight of hydrogenated oil, 20 to 30 parts by weight of tetra-n-butoxytitanium and 40 to 60 parts by weight of poval (polyvinyl alcohol) are put into a stirring tank and stirred to obtain a kneaded product.

In the fourth step, the herbaceous powders are selected from a variety of kinds such as rice straw, barley straw, straw, rice husks, cornstalks and leaves, soybean stems and pods, onion stalks, sweet potato stalks, pine needles, And the waste paper that has been wiped in the form of cotton is crushed into waste paper having a size within 10 to 15 cm in each direction as described in the Japanese Patent No. 10-1308869 filed by the applicant of the present invention, It is effective to use a surface with a lint so that the surface of the waste paper is swollen like a cotton and has a lot of voids between the lint.

That is, the reason why the waste paper is used in a cotton-like form having a lot of pores between the lumps formed by the swelling of the surface is that the food sludge powder fermented by the pores and the herbal powder absorbing the carbohydrate are inserted, The waste paper pulp in the form of cotton is used because the combination of the pulp waste paper, the fermented food sludge powder and the carbohydrate-absorbing herbal powder can be satisfactorily performed.

Step 5: Molding process

The kneaded product obtained in the fourth step is formed into a predetermined shape by a conventional extruder and is discharged through the dies, and is cut by three seasons and conveyed to a dryer.

When the solid fuel thus produced is made of pellets, it is generally made into a cylindrical shape having a width of about 8 mm and a length of about 32 mm.

The food waste used as the main raw material in the present invention is a greenish-yellow plant synthesized with a carbohydrate which produces carbon, hydrogen, oxygen and nitrogen, phosphoric acid and protein through photosynthesis.

This biomass solid fuel made from greenish-yellow plants is a low-carbon eco-friendly biomass fuel compared to fossil energy that over-discharges carbon dioxide, which is the main cause of global warming, and pollutes the environment.

Most countries do not consider food waste to be a major resource of economic value until now, but treat it as a hazardous waste without value.

Although some of the foods are produced as fertilizers and feedstuffs, the users are avoiding the problems such as acidification of the land due to the salt contained in the light oil fertilizer of the fertilizer. In the case of the feed, the salt content And because of the satellites it is also not welcomed by users.

The properties and components of the constituent materials added to the food waste will be described in detail below.

In the first step, the material properties of tridecyl alcohol put into the drying tank such as food waste are colorless transparent liquid with slight mucilage, which is almost soluble in organic solvent but not soluble in water.

The use of the tridecyl alcohol is used as a deodorant raw material such as a nonionic or anionic surfactant (a detergent, a lubricant, a dispersant, or an emulsifier).

② In the first step, the material property of Copper Chlorophyll which is put into the drying tank like food waste is dark brown viscous substance and has a slight amine-like odor. It does not dissolve in water and ethyl alcohol, but it dissolves readily in water when added with an alkaline solution.

The use of copper chlorophyll is used as a deodorant raw material for the purpose of removing toothpaste and bad breath.

That is, the reason why tridecyl alcohol or copper chlorophyll is added in the above is added in order to deodorize the odor generated from the food garbage in a short time. Even if only one raw material is used, the deodorizing effect is effective. It is found that the deodorizing effect is more excellent when it is used.

(3) In the first step, the material properties of ethanolamine, such as food wastes, that enter the drying tank are colorless transparent viscous liquid at room temperature and white crystalline solid at low temperature. In addition, ethanolamine has good water absorption and is well soluble in water and alcohols. In particular, it reacts with various acids to form esters.

Ethanolamine has a flash point of 93.9 ° C (open type) and its application is used as synthetic detergent, emulsifier, cosmetics, surfactant, insecticide additive, neutralizer and so on.

The reason why ethanolamine is used is to neutralize the acidity and the sodium component in the salt component since the salt component contained in the food waste lowers the burning rate in the production of the solid fuel.

④ In the first step, sorbitol, such as food waste, which is put into the drying tank, is a six-fold linear polyhydric alcohol and can be extracted from seaweeds and the like.

The pure is a white, odorless crystalline component, sweet and absorbent, which releases water when released into the atmosphere.

The use of sorbitol as described above is widely used in foods, pharmaceuticals, textile industry and the like using a stable molecular structure, and is used as a surfactant, an inorganic ester, a drying agent and the like as a derivative.

The reason why sorbitol is used in the present invention is to save energy by shortening the working time by evaporating the water contained in the food waste in a short time.

⑤ In the fourth step, the material property of the coffee grounds added during stirring is dark brown, and fine pores of the powder absorb moisture.

About 7 million tons of coffee are produced in the world a year, and about 120,000 tons are consumed only in Korea. In general, the percentage of drinking coffee is only 0.02%, and the remaining 99.98% is abandoned. The abandoned coffee residue The formation of mold by absorbing moisture in the atmosphere destroys the environment and causes various environmental problems such as soil pollution, water pollution, air pollution and ecosystem disturbance.

However, since coffee residue has a large amount of proteins and minerals and absorbs the odor, if it is added during the stirring operation, a high calorific value can not be expected by using waste paper made in the form of food sludge powder, herbaceous plant powder or cotton, A large amount of nitrogen, protein, and minerals, which are contained in a large amount of coffee grounds, can be bound together to increase the calorific value as shown in [Table 1].

⑥ The material properties of the cured oil added in the fourth process (agitation process) are non-drying oil, sour or brown, and a little fishy. Depending on the type of whale, the features are somewhat different.

Feeding oil: Fatty acid composition by long-lived water = saturated acid It mainly contains C ₁₄ and C ₁₈ , and contains about 25% of C ₁₈ and C ₂₂ .

Milhyang via: fatty acid of 60 to 65% (81% of the double liquid saturated acid, 19% of the solid acid), from 32 to 42% high monovalent alcohol [cetyl alcohol _{(CH 3 (CH 2) 14} CH 2 OH ) And oleyl alcohol (C ₁₈ H ₃₅ OH) as the main component], and 1.4 to 3.5% of glycerin. It does not dissolve in water and dissolves in alcohol.

Wax: Wax is a wax obtained by refining a solid component of a wax in the head of a horse's horsetail. Its main component is palmitic acid (C ₁₅ H ₃₁ COOH) cetyl ester.

Such hardened oils are mainly used for margarine, pharmaceuticals, cosmetics, hardening decomposing soap, surfactants, and lamp oil.

Unlike general surfactants, hardened oils have both anionic and cationic affinities, and are particularly closely related to vegetable fibers (see, for example, The hardened oil has a high iodine value of 97 to 153. That is, it represents the amount of ng of potassium oxide necessary for neutralizing the liberated fatty acid contained in 1 g of the fat. The amount of heat generated when the acid and alkali are neutralized with 1 g equivalent is 18 ° C. 13.7 Calories are the water that represents calories. Iodine is an element belonging to the family of halogens and is sometimes referred to as iodine).

In the present invention, the addition of the above-mentioned curing oil is not limited to the case where only the material in which the rice straw powder and the pulverized waste paper, which are obtained by pulverizing the food waste by pulverizing the food waste, It is to combine calories to add effective calorific value. In addition, the hardened oil added was a mixed oil of the above-described intestinal milk, edible oil, and rapeseed oil.

The added curing oil has the advantage of not being an environmentally harmful substance as a substance used in foods and has a calorie of 4,323 kcal / kg increased by 958 kcal / kg from 3,365 kcal / kg based on pulverized powder produced by fermenting food waste, And decreased by 17.6 ~ 7.42% based on batch.

(7) Material property of tetra-n-butoxytitanium to be added in the kneading step of the fourth step is pale yellow transparent liquid having purity; 99%, specific gravity; 0.995 +/- 0.03 (25/4 DEG C), viscosity; 82 cps (25 캜), boiling point; 120/206/10 (占 폚 mmHg), solidification point; -40 ° C and hydrolyse very quickly.

The use of the above-mentioned tetra-n-butoxytitanium is used as a polymerization catalyst, an ester exchange catalyst, a crosslinking agent, a curing accelerator, an adhesion promoter, a ceramic sintering agent and the like.

The amount of heat added by adding the above coffee grounds, curing oil and tetra-n-butoxy titanium was 4,397 kcal / kg, which was increased by 1,032 kcal / kg from 3.365 kcal / kg based on the calorific value of the food sludge, To 6.26%. In addition, the toxicity of added tetra-n-butoxytitanium is 7,500 mg / kg of ALD (acute oral property) for rats, which is very low and does not cause human and environmental problems.

TGA-701 thermogravimetric analyzer (LECOCO, USA, Parr 630EF) and calorimeter (PARRCO, USA) were used for the analyzers used in Tables 1, 2 and 3 above.

It is an object of the present invention to provide a method for producing low-carbon environmentally friendly biomass solid fuel using food wastes, which comprises introducing food waste not separated from wastewater into a drying tank and adding tridecyl alcohol, copper chlorophyll, sorbitol, Is added to deodorize the odor generated in the food waste, neutralize and evaporate the salt component, dry and concentrate the food waste to the environment by using a separator, and remove the substances that interfere with the combustion. The food sludge is 100 to 200 mesh The herbaceous powder pulverized to about 100 to 200 in a separate process and the waste paper prepared in the form of cotton in a state of being fluffed on the surface are put into a stirred tank and stirred to bind the hardened oil added in the fourth step, In order to increase the agglomeration force of the mixed material, it is necessary to increase the combustion rate, The -n- butoxy titanium was added as a combustion catalyst.

⑧ The material property of poval (polyvinyl alcohol) added in the fourth step has a specific property which is water-soluble among synthetic polymers.

As a white powder, specific gravity is 0.3 ~ 0.7 in apparent density and 1.259 in maintenance. Heat stability and thermoplasticity are good.

There is no change in appearance when heated at a temperature of about 100 to 140 ° C for a short period of time, but is insoluble at around 150 ° C and swollen only in cold water.

Since the above-mentioned paper is coated with an aqueous solution having a high hydrophobicity due to its good adhesion, permeability, resilience and storage property, the surface properties such as smoothness and breathability are improved, and thus the paper is used as an adhesive.

Therefore, in the fourth step, the mixture of the food sludge powder and the waste paper in the form of herbaceous powder or cotton is mixed with the solid material of tetra-n-butoxytitanium and the solid fuel It is added as an additive to increase the density.

And Poplar has the advantage of not being environmentally harmful.

As described above, the present invention uses food waste as a main raw material and tridecyl alcohol, sorbitol and ethanolamine are added thereto to deodorize odors generated in food waste, and neutralize saline to dry and concentrate food waste, To remove the obstacles to the environment and the combustion, and the pulverized waste paper in the form of rice straw powder and cotton is added to a powder obtained by pulverizing the obtained food sludge into a stirrer and stirred. Thus, Tetra-n-butoxytitanium, and poval. This is an environmentally friendly, low-carbon, environment-friendly product that does not generate environmentally harmful substances when burned. It is not only cheaper than petroleum chemical fuel, but also recycles food waste Economy as biomass solid fuel produced by maximizing heat output by physico-chemical method It is a valuable invention that is of value.

As described above, the annual waste of food waste of 484,000 tons is abandoned in Korea. If this is converted into money, 14.74 trillion won will be wasted as food waste disposal cost, but it can not effectively deal with it and pollutes the environment. In developed countries, food waste is treated as an environmental pollutant that is not worth recycling. However, according to the present invention, it has been proved that food waste is a sustainable resource having economic value of recycling. Therefore, a country dependent on energy imports can utilize a huge amount of food waste generated in its own country as an energy resource, And an economic value that can contribute to the reduction of carbon dioxide.

Hereinafter, the process of drying food waste to obtain food sludge will be described by referring to Examples 1 and 2.

Example 1 is an example of a method for obtaining food sludge from food wastes in a state in which no wastewater and foreign matter are separated, Example 2 is a method for obtaining food wastes from vinyl, plastic, An animal bones and the like are removed, and the food sludge powder is obtained from the dried food waste which is dried with a separate food waste dryer without removing the wastewater.

[Example 1]

5 to 6,500 parts by weight of food waste which is not separated from waste water and foreign matter is collected, and 180 to 250 parts by weight of tridecyl alcohol and 40 to 70 parts by weight of chlorophyll are put into the tank, and the upper lid 200 to 260 parts by weight of ethanolamine and 150 to 200 parts by weight of sorbitol are put into the tank and the temperature in the drying tank is maintained at about 60 to 65 DEG C Which rotates the rotating blades in the tank at a low speed for 5 to 7 hours, neutralizes the salt components contained in the food waste while destroying bacteria and the like and concentrating them in a dry state, And 1,584 to 2,165 parts by weight of the obtained food sludge are pulverized to about 100 to 200 mesh.

The powder weight of the food sludge obtained in the above pulverizing step was 1,584 ~ 2,165 parts by weight, which was reduced by 2,415 ~ 4,335 parts by weight from the initial weight of 5,000 ~ 6,500 weight of food waste, Because the water contained in the water was completely evaporated and the foreign matter was removed.

In the drying step, the above-mentioned tridecyl alcohol and chlorophyll are introduced into the tank, and the upper lid is opened by stirring. The rotary blade in the tank is rotated at low speed for deodorization for 50 to 70 minutes, ethanolamine is added thereto, Neutralize the salt components contained in the food waste for 60 to 65 minutes at 60-65 ℃ temperature, add sorbitol to evaporate the water for 5 to 7 hours, remove the foreign substances with a separator, and pulverize.

[Example 2]

In the food waste collection hall, food waste such as vinyl, plastic and animal bones contained in food waste is removed, and food sludge dried in a conventional drying tank or the like is used as a raw material for fertilizer and the like.

Accordingly, the present inventors have found that 1,500 to 2,000 parts by weight of food sludge powder obtained by pulverizing food sludge to a size of about 100 to 200 mesh is removed from the food waste collection place and dried, and 180 to 250 parts by weight of tridecyl alcohol, 40 to 70 parts by weight of chlorophyll, 200 to 260 parts by weight of ethanolamine and 150-200 parts by weight of sorbitol were added and stirred.

At this time, the temperature in the stirring tank was maintained at 60 to 65 ° C as much as possible, and the stirring blade in the stirring tank was stirred for 5 to 7 hours while rotating at low speed.

The food sludge powder obtained in Examples 1 and 2 contains a large amount of salt. Since the salt content lowers the burning rate of the solid fuel to be produced, ethanolamine is added in order to neutralize the salt component. It is to add sorbitol to evaporate and dry the moisture quickly.

If the temperature in the tank is not constant, the food waste becomes dark brown and the burning rate of the solid fuel is lowered.

200 to 250 parts by weight of herbaceous powder, 200 to 250 parts by weight of ground paper in the form of cotton, and 10 to 30 parts by weight of coffee residue are put into a stirring tank in 1,500 to 2,000 parts by weight of the food sludge powder obtained through the above process, .

55 to 75 parts by weight of hydrogenated oil and 10 to 30 parts by weight of tetra-n-butoxytitanium were added to the material obtained through the stirring step, and 1 part of the added material was mixed with 1 The car kneading process is performed.

After the medium is added to the kneaded material in the first kneading step, 40 to 60 parts by weight of the mixture is added to the kneaded material in the amount of 350 to 450 parts by weight (hot 68 to 75 ° C), and the kneaded material is added to the kneaded material. Perform a secondary kneading process to complete the dough with one physical change.

In the kneading process, the food waste is deodorized by physicochemical method, neutralized and dried to deteriorate the environment, and the foreign matter which is disturbed in the combustion is separated. The food sludge obtained by pulverizing the powdered sludge is pulverized in the form of rice straw powder, If the water content by weight and the proportion of the constituent materials to be added are not suitable, the next process will not be smooth and the biomass solid fuel having a high calorific value will not be obtained.

It is also possible to add the curing oil, tetra-n-butoxytitanium and the porcelain added in the kneading process all at once. However, in order to obtain uniform dough, it is preferable to add them in order and knead them as described above.

In this process, rice straw is used as an herbaceous plant, but herbaceous plants other than rice straw may be used.

In addition to the additives described above, other additives such as sodium copper chlorophyllin, sodium acetate (CH ₃ COONa ₃ H ₂ O), sodium hypochlorite (NaOCl), ethylene glycol diglycidyl ether Glycol Diglcidyl Ether, Polyethylene Oxide, Coconut Oil, Palmitic acid and the like may be added.

As described above, the kneaded dough is made of stainless steel and squeezed at a pressure of 150 to 200 kgf / m < ² > as described in Korean Patent No. 1308869 filed by the present applicant, It is formed in a compressor to be discharged and discharged through a dice, and then is cut by three seasons and transferred to a tunnel type dryer.

An example of producing the biomass solid fuel produced as described above will be described as an example.

That is, it is considered that the solid fuel formed by the above-described molding process has a width of about 8.3 mm and a length of about 32.7 mm, and that the molded solid fuel has an expansion rate of about 1 mm Occurs.

The kneaded material formed through the molding process is subjected to a drying process in which it is dried by a tunnel type dryer having a height of 1,500 mm, a width of 1,000 mm, a length of 12,000 mm and a temperature of 95 to 105 ° C.

At this time, in the drying process, the deviation of the length of the solid fuel pellet is reduced by about 0.4 mm, so that the food waste having a width of 8 mm and a length of 32 mm can be recycled and used as a low-carbon environment friendly biomass solid fuel produced by a physicochemical method The material is completed.

The biomass solid fuel according to the above-described production method is a low-carbon environment having a substance as shown in Table 4 and a biomass solid fuel having a high calorific value.

As described above, the low-carbon eco-friendly biomass solid fuel according to the present invention proves that food waste is a sustainable energy resource having an economic value, and it can contribute not only to the economic benefits of the nation but also to the energy industry and the environment It is an inventor with great economic value.

Claims (7)

5 to 7,000 parts by weight of food wastes without wastewater and foreign matter removed, 80 to 250 parts by weight of tridecyl alcohol, 40 to 70 parts by weight of copper chlorophyll, 150 to 200 parts by weight of sorbitol, and 200 to 300 parts by weight of ethanolamine, A first step wherein the food waste is dried and concentrated while neutralizing the salt and sodium components contained in the food waste;
A second step of obtaining 1,500 to 2,000 parts by weight of food sludge obtained by removing foreign matter such as vines, synthetic resins, shells, metals, and animal bones from food wastes dried and concentrated in the first step;
A third step of pulverizing 1,500 to 2,000 parts by weight of food sludge having a foreign substance removed in a second step to about 100 to 200 mesh;
1,500 to 2,000 parts by weight of the food sludge powder, 200-250 parts by weight of the herbaceous powder, 200-250 parts by weight of the ground paper in the form of cotton, and 10-30 parts by weight of the coffee grounds are uniformly stirred in the stirring tank 55 to 75 parts by weight of the following hydrogenated oil, 20 to 30 parts by weight of tetra-n-butoxytitanium and 40 to 60 parts by weight of a polybutadiene are charged into a stirring tank and stirred to obtain a kneaded product;
A fifth step of molding the kneaded product obtained in the fourth step into a predetermined shape in an extruder and cutting the kneaded product into three pieces while drying it with a drier;
The method comprising the steps of: preparing a low-carbon eco-friendly biomass solid fuel using food waste.
The method of claim 1, wherein the drying tank in the first step has an upper lid opened and a stirring blade rotates at a low speed in the drying tank body.
The method according to claim 1, wherein the temperature in the drying tank in the first step is maintained at 60 to 65 ° C. and the stirring time is about 5 to 7 hours. Production of low-carbon environmentally friendly biomass solid fuel using food wastes Way.
A food sludge powder, 1,500 to 2,000 parts by weight of food sludge powder obtained by pulverizing food sludge at about 100 to 200 mesh, 80 to 250 parts by weight of tridecyl alcohol, 40 to 70 parts by weight of copper chlorophyll, 150 to 70 parts by weight of sorbitol, 200 parts by weight of ethanolamine and 200-300 parts by weight of ethanolamine are stirred into a stirring tank to neutralize the salt and sodium components contained in the food waste, and the food waste is concentrated to obtain food sludge;
1500 to 2,000 parts by weight of the food sludge powder, 200-250 parts by weight of the herbal-based powder, 200-250 parts by weight of the waste paper in the form of cotton, and 10-30 parts by weight of the coffee residue were stirred in a stirred tank 55 to 75 parts by weight of a hydrogenated oil, 20 to 30 parts by weight of tetra-n-butoxytitanium and 40 to 60 parts by weight of a polybutadiene are charged into a stirring tank and stirred to obtain a kneaded product;
A third step of shaping the kneaded product obtained in the second step into a predetermined shape in an extruder, cutting the kneaded product into three pieces while being dried, and drying the kneaded product with a drier;
The method comprising the steps of: preparing a low-carbon eco-friendly biomass solid fuel using food waste.
The method according to claim 4, wherein the temperature of the inside of the stirring tank in the first step is maintained at 60 to 65 ° C and the stirring time is about 5 to 7 hours. Production of low-carbon environmentally friendly biomass solid fuel using food wastes Way.
The food waste according to claim 1 or 4, wherein the herbal powder is one or more of straw, barley straw, straw, rice husk, cornstalk and leaves, soybean stem and bean pod, onion stem, sweet potato stem, A method for manufacturing a low - carbon eco - friendly biomass solid fuel using.
The method for producing a low-carbon eco-friendly biomass solid fuel using food wastes according to claim 1 or 4, wherein the predetermined shape formed in the compressor and discharged from the dies and cut in three seasons is in the form of pellets.

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