KR101524410B1 - Eco-friendly method for manufacturing briquettes and Eco-friendly briquettes - Google Patents

Abstract

The present invention relates to an eco-friendly briquette which does not generate toxic gas and enhances the combustio time, and a method of manufacturing an eco-friendly briquette, wherein some components of cleaning agent are decomposed in a combustion process of briquette to generate oxygen, and thus complete combustion of coal which is a main ingredient of a briquette is induced to eliminate harmful gas emissions, thereby achieving better eco-friendliness and reducing the amount of uncombusted carbon to lengthen combustion time and decrease generated dusts.

Description

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for producing a clean briquette and a clean briquette,

The present invention relates to an environmentally friendly clean briquette and a method for producing clean briquettes in which no harmful gas is generated and the combustion time is improved. More particularly, the present invention relates to a method for producing clean briquette The present invention relates to a clean briquette and a method for manufacturing clean briquette in which the combustion time is increased and the generation of dust in the briquette is reduced due to the fact that the harmful gas is not discharged to the human body by inducing complete combustion of the main coal, .

Generally, briquettes were manufactured and supplied for the purpose of heating indoor buildings in the winter after the 1960s. Other carbides were crushed and mixed with anthracite coal as an main raw material or blended with a binder to form and dried It is a cylindrical solid fuel. Such briquettes are also referred to as pits or holes because they have air holes in the vertical direction. Carbon monoxide, which is harmful to the human body, is generated in the ignition combustion process of briquettes. Especially when air containing 0.05% or more carbon monoxide in the air is absorbed into the human body through the respiratory tract, it is an extremely poisonous substance that shows signs of poisoning and threatens life. Therefore, caution should be exercised when replacing briquettes in boilers and do not create an environment where incomplete combustion may occur.

In addition, nitrogen oxides and sulfur oxides are generated in the harmful gas discharged to the outside due to the combustion of briquettes. Nitrogen oxides and sulfur oxides not only cause acid rain, but they also cause gas to be a main cause of environmental pollution such as causing diseases by stimulating human eyes and respiratory tract and destroying chlorophyll of plants and causing death.

The briquettes, which had been supplied since the 1960s, started to increase in 1986, but the consumption of briquettes gradually decreased due to the above problems and improvements in human living standards and the supply of clean gas such as city gas and oil. Again, the use of briquettes is increasing, mainly for household use.

Therefore, it is possible to reduce the emission of harmful gas during the combustion of briquettes and to prevent the generation of bad odors when exchanging briquettes, so that the user can use it safely. A method of manufacturing an environmentally friendly clean briquette and a clean briquette is required.

1. Open Patent Publication No. 10-2009-0001120 'Environment-friendly fuel composition and method for manufacturing briquettes using the same' (Published date 2009.01.08) 2. Published Japanese Patent Application No. 10-1010-0084800 " Briquettes and their manufacturing methods " (Published on July 28, 2010)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to improve the burning rate of coal contained in briquettes to reduce environmental pollutants generated during the combustion process of briquettes and to reduce the incidence of unburned coal Thereby improving the duration of combustion and the combustion efficiency. The present invention also provides a method for manufacturing a clean briquette and a clean briquette.

In addition, the present invention can reduce the amount of dust generated in the remaining briquette material after combustion by producing a briquette by mixing a cleaning agent containing a hydroxide of an alkali metal or an alkaline earth metal to improve the strength of the briquette material, Thereby providing a clean briquette in which the quality can be uniformly produced.

The cleaning agent for briquette addition according to the present invention is characterized in that it contains any one selected from hydroxides of alkali metals or hydroxides of alkaline earth metals and borax, triethanolamine, hydrogen peroxide and water which are amine stabilizers.

The method for producing a clean briquett according to the present invention comprises: a mixing step (S100) of mixing a powder mixture of at least one selected from anthracite coal, coal, charcoal and an organic material, A step S200 of injecting the mixed mixture into a mold; A pressing step (S300) of pressing the mixture introduced into the forming die to form the mixture so as to have a predetermined shape; A demolding step (S400) of demolding the pressed mixture in a mold; A drying step (S500) of drying the shaped mixture which is demolded from the molding die; (S600) for removing the volatile components or harmful gas contained in the mixture, and then performing a drying step to dry the mixture, which has been primarily dried at 500 to 600 ° C. (S600).

Wherein the cleaner comprises a first mixing step (S110) of mixing borax into a solution at 50 DEG C in which one of alkali metal hydroxide or alkaline earth metal hydroxide is dissolved; After the first mixing step (S110), the triethanolamine is heated to 70 to 75 ° C in order to improve the fluidity of the triethanolamine and smooth the mixing with the solution, and then the aqueous solution mixed in the first mixing step (S110) (S120); And a third mixing step (S130) of cooling the aqueous solution having been subjected to the second mixing step (S120) to a predetermined temperature and adding and mixing the hydrogen peroxide (S130), and then mixing with the selected carbide powder.

The present invention also produces a clean briquette by the method of manufacturing a clean briquette.

The present invention can reduce the dust generation amount of the carbon black during the combustion by reacting the fly ash of coal and anthracite with the metal by mixing a cleaner containing a hydroxide of an alkali metal or a hydroxide of an alkaline earth metal with coal and anthracite coal, It has the advantage of keeping the strength of the briquette by connecting the particles with the particles when they are tangled with other materials.

In addition, during the combustion process of briquettes, the components (borax and hydrogen peroxide) of the cleaner are decomposed to generate oxygen, and the active sites of coal are increased by hydroxides to induce complete combustion of coal, the main component of briquettes, The use of briquettes can prevent the poisoning of briquette gas and it is possible to reduce the generation of harmful gases (SOx, NOx) by the generation of metal and oxygen.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing the manufacturing steps of the method for producing clean briquettes of the present invention. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing the manufacturing steps of the method for producing the clean briquettes of the present invention.

The present invention relates to a method for producing a clean briquette for reducing the emission of carbon monoxide, which is a harmful gas harmful to the human body, and for suppressing the generation of nitrogen oxides and sulfur oxides, A cleaner is added. The cleaner added to the briquettes includes any one selected from hydroxides of alkali metals or hydroxides of alkaline earth metals and borax, triethanolamine, hydrogen peroxide and water. Hydroxide or hydroxide of an alkaline earth metal of the alkali metal is selected either by the ratio of the rotating components of which will be described later coal _{(SiO 2, Al 2 O 3} , Fe 2 O 3, CaO, Na 2 O, TiO, MgO , etc.) And it is generally preferable to use sodium hydroxide (NaOH) in the hydroxide of an alkali metal.

Referring to FIG. 1, a manufacturing method for producing clean briquettes performs a mixing step (S100). In the mixing step S100, an anthracite coal, a coal, a charcoal, an organic material is processed into a powder form, and then powder mixed with at least one selected from at least one selected from the group consisting of a cleaner and a binder is mixed together . The processed powder corresponds to a carbon powder that keeps the calorific value while the briquettes are burned and may vary in duration and calorific value depending on the ratio and type of powder to be mixed.

On the other hand, the binder is mixed for the purpose of imparting viscosity to the mixed powder in order to process the mixture, which has been processed into a powder form, into a specific shape, and is mixed with a binder such as pitch, bitumen, asphalt, starch sulfate solution, .

The cleaner is mixed with the carbon powder at a ratio of about 1,000 (powder): 1 (cleaner). The amount of the cleaner can be increased or decreased according to the quality of the carbon powder. It is important for the cleaner to have a uniform role in the mixing of the coal powder and the cleaner. For this purpose, the cleaning agent is diluted with a certain amount of water, and a certain amount of the cleaning agent solution is continuously sprayed While stirring in an agitator. On the other hand, when the cleaner is used in the winter, it may be frozen due to the temperature drop. Therefore, a substance which does not affect the effect of the cleaning agent while acting as a cryoprotectant during the winter may be added. Preferably, .

The anthracite coal used in the present invention is coal which burns well without carbonization because of good carbonization. It has a low volatile content of 3 to 7% and a high fixed carbon content of 85 to 95%. Therefore, the flame is short and does not smoke when burned. Since the ignition point is about 490 ° C, the fire does not stick well, but the firepower is strong and can be continuously burned while maintaining a constant temperature.

Further, the other coal used in the present invention is a blackish-brown flammable rock produced by sedimentation and burial of a perennial plant or aquatic plant in the geological period and then altered by heating and pressurizing action. Coal can be classified into peat (60%), peat (70%), coal (80%) and bituminous coal (80 ~ 90%).

In the production process of the present invention, sodium hydroxide in the hydroxide of alkali metal or hydroxide of alkaline earth metal is used as the cleaner, and as a result, the slagging property of coal is increased, Since the time for maintaining the weakened state is increased, the dust generated during combustion is adsorbed to reduce the dust generation amount.

1, the cleaning agent used in the mixing step S100 is 3 to 6% by weight of NaOH (alkali metal hydroxides and alkaline earth metal hydroxides use the same equivalent weight as NaOH), 8 to 12% by weight borax, 7 to 11% by weight of amine, 4 to 7% by weight of hydrogen peroxide, and the remainder of water. The amount of the mixed powder can be easily used by those skilled in the art.

Among the hydroxides of alkali metals and hydroxides of alkaline earth metals, sodium hydroxide, which is preferably used, is most easily associated with the strength of the finished briquettes because fusion of the briquettes and combustion is completed because they easily melt at high temperatures. That is, when the alkali metal hydroxide or alkaline earth metal hydroxide is melted, the generated metal binds particles and particles of other coal and other carbides and forms a matrix to maintain the strength of the briquette. Therefore, when replacing the briquette, it can be easily removed from the stove and boiler without breaking the burnt briquettes.

As described above, the metal hydroxide is a strongly reactive substance, and organic structures (especially aliphatic hydrocarbons) present in the coal are considerably collapsed. Physical defects caused by such chemical changes act as an active site in the combustion process Thereby increasing the combustion reactivity. Therefore, it is possible to provide an additional effect of increasing the combustion time by inducing complete combustion of coal to suppress the generation of carbon monoxide and reducing unburned carbon content.

Hydrogen peroxide and borax are decomposed at high temperature during burning of carbonaceous powder, and oxygen is generated and oxygen is generated to induce complete combustion of coal, thereby reducing the generation of carbon monoxide. On the other hand, the hydroxyl group (OH) of the metal hydroxide (MOH: M represents alkali metal or alkaline earth metal) contained in the cleaner reacts with the generated carbon monoxide to convert it to carbon dioxide (CO ₂ ), thereby suppressing the generation of carbon monoxide.

CO + OH - > CO ₂ + H

H + ½O ₂ → OH (chain reaction)

In this way, if the oxygen required for coal combustion is supplied during the combustion process, a part of the amount of air required for coal combustion is not introduced from the outside, and thus the amount of themal-NOx generated by nitrogen contained in the air during combustion can be reduced. That is, if the user adjusts the blowing amount of the outside air required in the combustion process, there is an advantage that the generation of the nitrogen oxide generated when the outside air is used can be suppressed.

Sulfur oxides (SOx: x = 2, 3), which are air pollutants, are generated by the oxidation of sulfur compounds contained in coal and anthracite. The oxides of sulfur and metal hydroxide (MOH) contained in the cleaner are MSO ₃ , MSO _4, M ₂ SO ₃ , M ₂ SO _4, and the like. That is, the metal hydroxide in the high temperature state in the combustion state exists in the form of M, MO or M ₂ O and reacts with sulfur oxides to form solid materials such as MSO ₃ , MSO _4, M ₂ SO ₃ and M ₂ SO ₄ . Therefore, it is possible to reduce the emission of environmental pollutants by suppressing the generation of sulfur oxides occurring in the combustion of coal.

SO ₃ + H ₂ O → H ₂ SO ₄ , H ₂ SO ₄ + Na ₂ B ₄ O ₇ → Na ₂ SO ₄ (S) + B ₄ O ₇

MO + SO ₃ → MSO ₄ MO + SO ₂ → MSO ₃

M ₂ O + SO _{3 -} > M ₂ SO ₄ M ₂ O + SO _{2 -} > M ₂ SO ₃

Triethanolamine is mixed with amine-based stabilizers to maintain the stability of the cleanser in which various materials are dissolved.

Referring to FIG. 1, after the mixing step S100 is performed, a step S200 of injecting powder mixed with a cleaning agent into a mold for molding according to the standard of briquetting is performed. At this time, the molding frame is classified into industrial use and household use and can be appropriately used according to the purpose of use. Thereafter, a compression step (S300) is performed in which the mixture charged into the forming mold is squeezed so as to solidify the mixture injected into the molding mold so as to maintain the same shape as that of the molding mold. The pressing can be performed at a constant pressure using a pressing machine such as a press machine.

Thereafter, a de-molding step (S400) for demolding the mixture pressed in the molding die is performed, and a drying step (S500) for drying the solidified mixture in the shape of the molding die is performed. The drying step (S500) is performed to evaporate the water contained in the cleaning agent to increase the strength of the solidified mixture, and can be dried using natural drying and a blower.

Also, referring to FIG. 1, a drying step (S500) is performed and then a carburizing step (S600) is performed to remove volatile components or noxious gas contained in the mixture solidified to a predetermined strength. That is, if only the drying step (S500) is performed, volatile components and noxious gas may remain in the mixture such as coal. It is preferable to remove the volatile components and the noxious gas by carrying out the drying at 500 to 600 ° C for a predetermined time.

Referring to FIG. 1, the cleaner may include at least one selected from the group consisting of anthracite coal, coal, charcoal, and an organic carbide powder after performing a first mixing step S110, a second mixing step S120 and a third mixing step S130. Or may be mixed with a powder mixture of two or more.

The first mixing step (S110) is a step of mixing borax into a solution at 50 DEG C in which one of alkali metal hydroxide or alkaline earth metal hydroxide is dissolved. Since borax is easily melted at a high temperature under basic conditions, it is preferable to add borax to an aqueous solution at a high temperature to melt it.

In the second mixing step (S120), the triethanolamine is heated to about 70 to 75 ° C, and then the heated triethanolamine is mixed and mixed in the mixed solution in the first mixing step (S110). At this time, the triethanolamine should be heated at about 70 to 75 캜 before mixing to achieve smooth mixing.

The third mixing step (S130) corresponds to mixing the hydrogen peroxide into the aqueous solution that has passed through the second mixing step (S120) and mixing. When hydrogen peroxide is added, a certain amount of water should be slowly added. It is preferable to add water while cooling the aqueous solution to a constant temperature.

On the other hand, the clean briquettes can be manufactured by the above-described method for producing clean briquettes, and the clean briquettes can be produced by mixing powder of at least one selected from anthracite coal, coal, char, and carbide powder of an organic material or two or more thereof, Alkaline earth metal hydroxides, preferably a mixture of sodium hydroxide, borax, triethanolamine, hydrogen peroxide and a water-miscible cleanser for briquette addition.

As described above, the briquettes of the present invention generate oxygen while decomposing at high temperatures, and induce complete combustion of coal, which is a main component of briquettes, due to oxygen generated, so that carbon monoxide and noxious gases (sulfur oxides, nitrogen oxides, etc.) There is an advantage that the risk of gas poisoning can be remarkably reduced, and since the briquette can be completely burned, the burning time is increased, which can bring about an economical effect.

Claims (4)

delete A carbide powder mixed with at least one selected from anthracite coal, coal, charcoal, and carbide powder of an organic material, a hydroxide of an alkali metal or a hydroxide of an alkaline earth metal, and borax, an amine stabilizer, triethanolamine (S100) mixing a detergent comprising hydrogen peroxide and water and a binder comprising pitch, bitumen, asphalt, starch sulphate solution, sugar and inorganic binder, and starch;
A step S200 of injecting the mixed mixture into a mold;
A pressing step (S300) of pressing the mixture introduced into the forming die to form the mixture so as to have a predetermined shape;
A demolding step (S400) of demolding the pressed mixture in a mold;
A drying step (S500) of drying the shaped mixture which is demolded from the molding die;
(S600) in which the first dried mixture is dried at 500 to 600 DEG C after performing the drying step to remove volatile components or noxious gas contained in the mixture;
The method of manufacturing a clean briquette according to claim 1, 3. The method of claim 2,
The cleaner
A first mixing step (S110) of mixing borax into a solution at 50 DEG C or higher in which at least one hydroxide selected from alkali metal hydroxide or alkaline earth metal hydroxide is dissolved;
After the first mixing step (S110), the triethanolamine is heated at 70 to 75 DEG C to improve the fluidity of the triethanolamine and smooth the mixing with the solution, and then the solution mixed in the first mixing step (S110) A second mixing step (S120) for mixing;
A third mixing step (S130) in which the aqueous solution having been subjected to the second mixing step (S120) is cooled to a predetermined temperature and hydrogen peroxide is added thereto and mixed; And then mixed with the selected carbide powder. A clean briquette produced by the method of any one of claims 2 to 3.

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