KR20170141055A - High caloric carbonized pellet, and method and device for manufacturing thereof - Google Patents

Abstract

The present invention relates to carbonized pellets, having a high calorific value, of which the carbon element content is 50-99% and the lower heating value is 4500-8000 kcal/kg, and to a method and an apparatus for preparing the carbonized pellets having a high calorific value. The method comprises the following steps: preparing wood chips by means of peeling wood; torrefying the prepared wood chips in an oxygen-free atmosphere; powderizing the torrefied wood chips by means of grinding; molding a mixture of a binder and a nano-metal catalyst solution and the torrefied wood chip powder into pellets; and carbonizing the molded pellets.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high calorific carbonized pellet,

The present invention relates to a high calorific carbonization pellet having improved carbon content and calories, and a method and an apparatus for producing the same.

Recently, the need for the development of renewable energy that can replace fossil fuels is increasing to prevent global warming due to the increase of carbon dioxide. In particular, since 2012, a mandatory Renewable Portfolio Standard (RPS) has been mandatory for coal-fired power plants, which is actively promoting the use of biomass, one of the renewable energy sources.

In particular, wood biomass such as wood chips and wood pellets is an eco-friendly fuel that produces less than one tenth of the fossil fuel in burning, making it an attractive substitute for fossil fuels. have.

Since currently used wood chips and wood pellets are imported from specific regions such as Canada, Southeast Asia and Europe, there are problems in supply and demand, low cost efficiency due to high transportation cost, high moisture content of about 10% It may cause problems such as decomposition due to natural decomposition and decay by moisture, and it is difficult to store and distribute.

When wood chips and wood pellets are mixed together with coal, the amount of heat generated is low at 4000 kcal / kg, which causes an increase in the use amount of coal compared to coal, and a reduction in heat generation due to hygroscopicity leads to a problem of low power generation efficiency. Since wood chips and wood pellets are very strong in fiber components, there is a problem that the particles are large and uneven in the pulverizing process at the time of coal and coarse so that they affect the equipment.

In order to overcome these problems, research is being conducted to produce semi-carbonized pellets by torrefaction of woody biomass. Torrefaction is a method of treating biomass at high temperature in an anoxic atmosphere. This method removes low volatility and moisture, removes the hydroxyl groups of hemicellulose, cellulose and lignin, which form the woody biomass, in the form of CO and CO ₂ , So as to have low hygroscopicity and increase the calorific power per unit weight.

Korean Patent Registration No. 10-1287184 discloses a method of efficiently burning a combustible gas in a semi-carbonization reaction furnace by efficiently burning a fuel in a semi-carbonization reaction furnace which heats a biomass through an anaerobic exhaust gas, A method of improving thermal efficiency by burning is disclosed. However, it has been mentioned about the efficiency of the semi-carbonization process and the energy saving to be used. However, it is not a concrete method for improving the calorific value of the carbonized pellets as a fuel, nor an innovative idea in the conventional method in the treatment process.

Korean Patent Registration No. 10-1308397 discloses only the manufacture of semi-carbonized products that improve the calorific value by increasing the carbon content through the simple grinding process by the low temperature semi-carbonization process.

Korean Patent No. 10-1287184 (Nov. Korean Registered Patent No. 10-1308397 (2013.09.09.)

In order to solve the above-mentioned problems, the present invention provides a wood chip having a reduced ash content by removing wood to improve semi-carbonization efficiency and carbonization of a gas component generated during half-carbonization under anoxic condition, The present invention relates to a high-caloric carbon pellet, which has improved energy efficiency by inducing a polymer reaction of a low-boiling substance such as a low-molecular lignin and a pyrolysis substance by reacting a nanocatalyst catalyst solution with a semi-carbonized wood chip during the carbonization step, And to provide the above-mentioned objects.

In order to achieve the above object, the present invention relates to a high calorific carbon pellet having a carbon element content of 50 to 99% and a low calorific value of 4500 to 8000 kcal / kg.

Another aspect of the present invention is a method for producing a pelletized product, comprising the steps of semi-carbonizing wood under anaerobic conditions, crushing and pulverizing semi-carbonized wood, molding pellets of a mixture of semi-carbonized wood powder with a binder and a nano- And carbonizing the molded pellets. BACKGROUND OF THE INVENTION

Another aspect of the present invention relates to a method of producing a pelletizing machine, which comprises a semi-carbonating reactor for semi-carbonizing wood under anaerobic conditions, a crusher for crushing and pulverizing semi-carbonized wood, a mixer for mixing semi-carbonized wood powder with a binder and a catalyst, And a carbonization reactor for carbonizing the pellets.

Since the carbonized pellets according to the present invention have high carbon content and calorific value through the steps of semi-carbonization and carbonization, the energy density can be improved by 30% or more as compared with the conventional wood pellets. In addition, through the high-density compression process in which semi-carbonized pellets are molded into pellets, the bulk density of 750 kg / m3 or more improves the density by 35% compared to conventional wood pellets, and the transportation cost is reduced by 30% It is economical to do.

Also, it is used in the step of carbonizing the gas component generated in the semi-carbonization step. The by-product obtained in the production of the wood chip and the by-product gas generated in the carbonization reaction are recovered by the combustor and the heat generated in the combustor is carbonized It is possible to provide an economical manufacturing technique of an energy-independent type by using an energy circulation system supplied to a reactor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing an overall process for explaining a configuration of an apparatus for producing a carbonized pellet according to an embodiment of the present invention. FIG.
2 is a flowchart illustrating a process of manufacturing a wood chip according to an embodiment of the present invention.
FIG. 3 is a flowchart showing a process of a semi-carbonization reactor for explaining a configuration of a carbonized pellet production apparatus according to an embodiment of the present invention.
FIG. 4 is a flowchart showing a process of a crusher for explaining a configuration of an apparatus for producing a carbonized pellet according to an embodiment of the present invention.
FIG. 5 is a flowchart showing a process of a mixer and a molding machine for explaining a configuration of a carbonized pellet manufacturing apparatus according to an embodiment of the present invention.
FIG. 6 is a flowchart showing a process of a carbonization reactor for explaining a configuration of an apparatus for producing a carbonized pellet according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a high calorific carbon pellet of the present invention, a method and an apparatus for producing the same will be described in detail.

The present invention is characterized in that a high calorific carbon pellet having a carbon element content of 50 to 99% and a low calorific value of 4500 to 8000 kcal / kg can be produced.

Since the present invention uses peeling of wood, it has a feature of increasing the low calorific value per unit weight and decreasing the ash content, and it is possible to maximize the lubricated flow and the heat transfer effect in the step of making the peeled wood chip and half- There are features.

The present invention relates to a method of carbonizing a carbonized pellet by using a minimum of nitrogen (N ₂ ) gas under anoxic condition in a step of performing a reaction and carbonizing the generated gas component and a high concentration of hydrocarbon gas, There is a feature that can increase the amount of fixed carbon. The hydrocarbon gas may include any one or two or more gases selected from methane (CH ₄ ) and acetylene (C ₂ H ₂ ).

In the present invention, polymerization is performed to convert lignin and a low boiling point material into a layered carbon ring structure, which is a high boiling point material, through a step of cabonization using a nano metal catalyst solution, And the strength, specific surface area and carbon content of the carbonized pellets can be increased.

The present invention is characterized in that an additive and a binder are mixed with a semi-carbonized wood chip powder to increase the amount of heat and to improve the bonding and strength of the lubrication function and the pellet when the pellet is molded.

The present invention is characterized in that a high concentration of hydrocarbon gas produced in the step of calcining is used in the step of cabonization and the exhaust gas in the step of cabonization is recovered by a combustor. The hydrocarbon gas may include any one or two or more gases selected from methane (CH ₄ ) and acetylene (C ₂ H ₂ ).

The present invention is characterized by providing an energy-saving carbonization pellet manufacturing process by burning by-products obtained in the production of wood chips and exhaust gas in the step of cabonization in a combustor to provide a self-supporting heat source.

The present invention is characterized in that the rotary reactor and the combustor are integrated, the inside is a reactor, and the outside is a combustor, thereby indirectly heating the reactor.

Hereinafter, the present invention will be described in detail.

In the present invention, 'carbonized pellets' means that the wood is heated in an oxygen-deficient state, and the wood is heat-treated with water and a small amount of carboxylic acid such as acetic acid, formic acid, propionic acid and butanoic acid, acid is removed to increase the energy per unit weight by concentrating high heat components. That is, by improving the composition ratio of cellulose, hemicellulose and lignin, the hygroscopicity of hygroscopicity and physical properties are improved.

In the present invention, a method for producing high calorie carbonized pellets comprises the steps of semi-carbonizing wood under anoxic condition, crushing and pulverizing semi-carbonized wood, pelletizing a mixture obtained by mixing semi-carbonized wood powder with a binder and a nano- Step, and carbonizing the molded pellets.

The present invention further includes a step of de-bumping the wood log.

The wood logs may be all kinds of coniferous trees and broad-leaved trees.

Specifically, it is possible to separate the peeled wood and the by-product (Back) by debacking the wood. The yield of the peeled wood can be 80 to 95% by weight, and since the wood is used by peeling, the ash content can be reduced during the production of the pellets, and the lower heating value per unit weight can be increased.

The back produced during the peeling may be supplied to the combustor and used as fuel. At this time, it is preferable that the byproduct is dried in the drier to a moisture content of 15 wt% or less and supplied to the combustor, but the present invention is not limited thereto.

The present invention may further comprise a washing step of washing the wood. It may be desirable to remove foreign matter such as sand or soil from the wood through conventional cleaning methods.

The present invention further includes a step of pulverizing the wood to produce a wood chip.

Specifically, it may be desirable to crush the peeled wood to produce wood chips. The size of the manufactured wood chip is preferably 10 x 10 mm and preferably 7 x 7 mm, but is not limited thereto. The thickness of 1 to 10 mm, preferably 2 to 5 mm is preferable because it can maximize the lubricating flow and the heat transfer effect in the step of semi-carbonization.

The manufactured wood chip may further include a step of sieving, and it may be preferable to return the larger size to the chip maker and re-crush it.

The present invention includes a step of subjecting the produced wood chip to an anaerobic process. The wood chips can be sequentially dried in a device such as drying and semi-carbonating through a semi-carbonating step.

Through the semi-carbonization step, moisture of the wood chips and low-temperature volatile substances can be removed, and carbon content can be increased by thermal decomposition of hemicellulose, cellulose and lignin, which are main components of wood.

Specifically, the semi-carbonization is preferably carried out at 180 to 400 ° C for 5 minutes to 180 minutes, more preferably at 220 to 300 ° C for 5 minutes to 60 minutes using a minimum amount of nitrogen (N ₂ ) May be desirable. Within the above temperature range, gentle pyrolysis may occur and the semi-carbonized wood chip production yield is not lowered, and the carbon content can be increased to 50 to 75 wt%, which may be desirable.

Carbon monoxide (CO), carbon dioxide (CO ₂ ), hydrogen (H ₂ ) and hydrocarbon gases can be generated using minimal nitrogen (N ₂ ) gas under anaerobic conditions in the step of torrefaction. The entire amount of the generated gas may be supplied to the step of cabonization. The hydrocarbon gas may include any one or two or more gases selected from methane (CH ₄ ) and acetylene (C ₂ H ₂ ).

Specifically, in the semi-carbonization step, the reactor should be kept as tightly closed as possible, and it may be preferable that the air flow is shut off from the outside by maintaining the negative pressure within 0 to -10 mmH ₂ O or 0 to -0.098 kPa.

In the present invention, the torrefied wood chip may further include a step of cooling. Cooling is a conventional cooling method, and it may be desirable to cool it in a nitrogen atmosphere at 40 DEG C or less.

 The present invention includes a step of crushing and pulverizing a semi-carbonized wood chip. Specifically, the semi-carbonized wood chips are preferably pulverized into an average particle size of not more than 170 mesh and pulverized. The use of the semi-carbonized wood chips for pulverization can be used to uniformly mix the binder and the nano-metal catalyst solution when mixing them, to facilitate injection during molding, to carbonize uniformly when carbonized, and to reduce carbonization time .

The present invention includes a step of pelletizing a mixture of torrefied wood chip powder, a binder and a nano-metal catalyst solution.

First, a mixture can be prepared by adding and mixing a binder and a nano-metal catalyst solution to a torrefied wood chip powder. At this time, the mixture may be prepared by further containing an additive.

Specifically, it is preferable that the semi-carbonized wood chip powder is further mixed with the additive before primary mixing of the binder and the nano-metal catalyst solution, then mixed with the binder and the nano-metal catalyst solution to prepare a mixture can do.

Specifically, the additive may include any one or a mixture of two or more selected from starch, sawdust, charcoal, activated carbon, fruit husk, grain husks and coffee bean, and more preferably starch, Sawdust, charcoal, but is not limited thereto. The fruit skin includes byproducts such as coconut palm skin, grape skin, and the like, and is not now limited.

It is preferable that the additive is added in the form of powder by pulverizing to an average particle size of not more than 170 mesh.

More specifically, the additive It is preferable that 0.1 to 100 parts by weight, more preferably 1 to 50 parts by weight, is included in 100 parts by weight of the semi-carbonized wood chip powder. Within this range, the mixture may be desirable because it increases the amount of heat of the semi-carbonized wood chip powder and improves lubrication, bonding and strength when the mixture is molded into pellets.

Specifically, the binder may include any one or a mixture of two or more selected from carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), molasses, and starch, It is not limited.

More specifically, the binder preferably includes 0.5 to 50 parts by weight, more preferably 1 to 30 parts by weight, based on 100 parts by weight of the semi-carbonized wood chip powder. The viscosity of the mixture can be increased within the above-mentioned range.

In the present invention, the nano-metal catalyst solution may include a nano-metal catalyst, a surfactant, a reducing agent, and a stabilizer.

Specifically, the nano-metal catalyst may include any one or a mixture of two or more selected from metals, metal oxides, metal hydrides, metal hydroxides, metal carbides and metal nitrides.

Specifically, the metal may include any one or two or more selected from among iron (Fe), copper (Cu), nickel (Ni), aluminum (Al), zinc (Zn), and magnesium It does not. Aluminum (Al) enhances thermal stability and mechanical strength, iron (Fe) is excellent in removing odors and volatile components, and copper (Cu) is preferable because it is effective for antibacterial and odor.

Specifically, the metal oxide is iron oxide _{(III) (Fe 2 O 3} ), copper oxide (Cu ₂ O), nickel oxide (NiO), zinc oxide (ZnO), magnesium oxide (MgO), silicon dioxide (SiO _2), Aluminum oxide (Al ₂ O ₃ ), and the like, but is not limited thereto.

Specifically, metal hydrates include iron (II) sulfate (FeSO ₄ .4H ₂ O, FeSO ₄ .7H ₂ O), copper (II) sulfate (CuSO ₄ .4H ₂ O, CuSO ₄ .7H ₂ O) selected from II) sulfate _{(NiSO 4 · 6H 2 O)} , zinc sulfate _{(ZnSO 4 · 7H 2 O)} , magnesium (II) sulfate (MgSO ₄ · 4H ₂ O) and magnesium chloride hydrate (MgCl ₂ · 6H ₂ O) , But is not limited thereto.

Specifically, the metal hydroxide is iron hydroxide (Fe (OH) _3), copper hydroxide (II) (Cu (OH) 2), nickel hydroxide (II) (Ni (OH) 2), aluminum hydroxide (Al (OH) ₃₎ , Zinc hydroxide (Zn (OH) ₂ ), magnesium hydroxide (Mg (OH) ₂ ), and the like.

Specifically, the metal carbide is iron carbonate (II) (FeCO _3), basic copper carbonate _{(CuCO 3 · Cu (OH)} 2), nickel carbonate (II) (NiCO _3), Acid aluminum _{(Al 2 (CO 3) 3} ), zinc carbonate (ZnCO ₃₎ And Magnesium carbonate (MgCO ₃₎ And the like, but the present invention is not limited thereto.

Specifically, the metal nitride is iron nitrate _{(III) (Fe (NO 3} ) 3), copper nitrate _{(II) (Cu (NO 3} ) 2), nickel nitrate _{(II) (Ni (NO 3} ) 2), aluminum nitrate _{(Ai (NO 3) 3)} , zinc nitrate (Zn (NO _{3) 2)} and magnesium nitrate (Mg (NO _{3) 2)} And the like, but the present invention is not limited thereto.

Metal chloride may be further used. Specifically, iron chloride (FeCl _2), copper chloride (CuCl), nickel chloride (II) (NiCl _2), any one selected from aluminum chloride (AlCl _3), zinc chloride (ZnCl ₂₎ and magnesium chloride (MgCl ₂₎ Or more, or two or more.

The nano-metal catalyst preferably has an average particle diameter of 1 to 50 nm, and more preferably an average particle diameter of 1 to 30 nm. It is possible to produce the catalyst solution in which the nano-metal catalyst particles are dispersed in which the nano-metal catalyst can be uniformly distributed in the pores of the biomass matrix of the semi-carbonized wood chip powder within the above range.

More specifically, the nano metal catalyst comprises It is preferable to include 0.01 to 5 parts by weight, more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of the semi-carbonized wood chip powder. In the step of carbonizing the semi-carbonized wood chip powder within the above range, the low molecular weight organic material and the lignin of the semi-carbonized wood chip powder are formed into a carbon structure having a layered cyclic structure and the physical and chemical properties of the carbonized pellets It is possible to improve the physical properties and increase the carbon content.

Specifically, the surfactant may be selected from the group consisting of Polysorbate 20, 60, 80, Steareth 20, 21, Starch, Polyvinyl alcohol PVA, Carboxymethyl cellulose CMC ), Gelatin, and linear alkyl benzene sulphonate (LAS). However, the present invention is not limited thereto.

More specifically, the surfactant is preferably contained in an amount of 1 to 100 parts by weight, more preferably 10 to 50 parts by weight, based on 100 parts by weight of the nano-metal catalyst. When an adsorbed micelle is adsorbed on the surface of the nano-metal catalyst nucleus within the above-mentioned range, adsorbed micelles having an adsorbing ability can be formed.

The adsorbed micelle having the adsorption ability has a constant arrangement when a surfactant or a polymer substance is adsorbed around the nano-metal catalyst nuclei, and can exhibit a unique mechanism of adsorption dissolution (absolubilization). The above-mentioned absolbilization is a mechanism in which adsorption and solubilization occur simultaneously between organic molecular radicals in the micelle structure of the nanometal catalyst.

Specifically, an adsorbed micelle having adsorbing ability to a low-molecular-weight organic material and lignin of a wood chip serves as a catalyst, and in a carbonization step, it is polymerized through a condensation reaction and polymerized by a dehydrogenation reaction, The carbon structure of the cyclic structure can be generated to strengthen the wall of the carbonized pellet.

In the present invention, the reducing agent may include at least one selected from ammonium hydroxide (NH ₄ OH), hexamethylenetetramine, hexamine, and the like, and preferably hexamethylenetetramine (Hexamine) is preferably used And is not particularly limited as long as the object of the invention is achieved.

More specifically, the reducing agent may include 10 to 400 parts by weight, more preferably 50 to 300 parts by weight, based on 100 parts by weight of the nano-metal catalyst. And the reduction reaction of the nano-metal catalyst can be performed well within the above range.

Organic acids can be used as stabilizers. Specifically, the organic acid may be any one or a mixture of two or more selected from among citric acid, formic acid, and acetic acid, preferably citric acid. However, Is not particularly limited as far as it is achieved.

More specifically, the stabilizer preferably includes 10 to 500 parts by weight, more specifically 50 to 300 parts by weight, based on 100 parts by weight of the nano-metal catalyst. However, the stabilizer is not particularly limited as far as the object of the present invention is attained Do not. It is preferable that the pH of the solution is maintained at pH 3.5 within the above range so that the reduction reaction can be stabilized.

The nano-metal catalyst solution may further comprise water. 10 parts by weight to 1000 parts by weight, preferably 20 to 100 parts by weight, of water may be preferable per 1 part by weight of the nano-metal catalyst, but it is not particularly limited as far as the object of the invention is attained. The nano metal catalyst solution can be preferably formed within the above range.

The mixture can be molded into pellets in a conventional manner to produce pellets. At this time, the molding is preferable because the extrusion molding method can enhance the strength of the pellet and improve the pellet breakage, but is not limited thereto.

The size of the molded pellets is 5 to 16 mm in diameter and 2 to 35 mm in length, and a cylindrical shape is preferable, but it is not particularly limited and may be molded into an appropriate size according to the purpose.

The present invention includes a step of carbonizing the molded pellets.

Specifically, the step of carbonizing may be carbonized by supplying the step of carbonizing the gas component generated in the step of semi-carbonization. Carbonation can increase the amount of fixed carbon in the pellets. At this time, a high concentration of hydrocarbon gas may be further supplied and used. The hydrocarbon gas may include any one or two or more gases selected from methane (CH ₄ ) and acetylene (C ₂ H ₂ ).

Specifically, the carbonization step may be performed at 200 to 500 ° C for 5 minutes to 180 minutes, more preferably at 240 to 320 ° C for 10 minutes to 60 minutes. Within the above range, it may be desirable to increase the physical properties through modification of the pellets and to increase the fixed carbon content to increase the heat quantity.

More specifically, the carbonization step may be performed by reacting a low molecular weight linear structure in a pellet with a metal nanocatalyst solution to polymerize by a free radical to form a cyclic structure and a cross- Linking and Ring Structure Compound, and then converted to a layered carbon ring structure through deoxygenation and dehydrogenation to increase the pelletization and physical properties of the pellets.

The carbonized pellets produced by the carbonization step can reduce the moisture content of the semi-carbonized wood chip powder to 5 to 30% by weight, the carbon element content is 50 to 99% and the low calorific value is 4500 to 8000 kcal / kg The high calorific carbon pellets can be produced.

In the present invention, the method further comprises a step of burning the gas generated in the step of carbonizing and the by-product generated in the step of producing the wood chip, wherein the generated heat source is used in the step of semi-carbonizing and carbonizing, .

In the present invention, an apparatus for producing high-caloric-carbonized pellets comprises a semi-carbonating reactor for semi-carbonizing wood chips under anaerobic conditions, a crusher for crushing and pulverizing semi-carbonized wood chips, a mixer for mixing the semi-carbonized wood chip powder with a binder and a catalyst, A molding machine for pelletizing the pellets and a carbonization reactor for carbonizing the pellets.

FIG. 1 shows an overall process flow chart for explaining a configuration of a carbonized pellet production apparatus according to an embodiment of the present invention.

The present invention may further include a wood chip manufacturing apparatus including a peeling remover for peeling the wood and a wood chip maker for manufacturing the wood chip. A process flow diagram of a wood chip manufacturing apparatus according to an embodiment of the present invention is shown in Fig.

Specifically, the wood chip manufacturing apparatus includes a debacking machine for peeling wood, a washer for washing wood, a wood chipper for manufacturing wood chips, And may include a sieve. A wood chip maker is preferable because it is possible to reduce ash by manufacturing the peeled wood into chips. The oversize of the wood chips selected through the siever may be recycled back to the wood chipper.

The present invention may further include a dryer for drying the by-products produced in the wood chip maker. It is preferable that the by-product is dried at a moisture content of 15 wt% or less in the dryer to increase the combustion efficiency. Dried by-products can be supplied to the combustor and used as fuel.

The present invention may further include a combustor that receives exhaust gas from a carbonization reactor, supplies dried wood byproducts from a dryer, and burns the heat, and supplies the heat generated by the combustion to a carbonation reactor and a carbonization reactor.

A process flow diagram of the semi-carbonation reactor according to one embodiment of the present invention is shown in FIG.

Specifically, as a torrefaction reactor, a rotary drum continuous reactor system, a screw type reactor system, a multi-stage furnace (MHF) system, a torpedo reactor, , A CMB (Compact Moving Bed) reactor system, a Belt dryer system, a Microwave Reactor system, and the like, but is not limited thereto. The semi-carbonation reactor can be used without limitation as long as it is excellent in energy recovery, mass yield and energy yield.

The semi-carbonation reaction of the above-described semi-carbonation reactor is preferably performed at 180 to 400 ° C for 5 minutes to 180 minutes under anaerobic conditions, more preferably at 220 to 300 ° C for 5 minutes to 60 minutes.

The semi-carbonation reactor may include a gas supply valve for regulating the gas introduced into the reactor and the gas supplied to the carbonization reactor, and may be a control device such as a programmable logic controller (PLC) And a sensor such as a pressure sensor, a temperature sensor, and a gas flow rate sensor.

The semi-carbonation reactor may further include a cooling unit for lowering the temperature of the semi-carbonized wood chip to 40 ° C or less. At this time, it may be preferable to cool in a nitrogen atmosphere.

A process flow diagram of the mill according to an embodiment of the present invention is shown in Fig.

More specifically, it is preferable to use at least one selected from the group consisting of a fin crusher, a hammer mill, a PAN grinder mill, and a roller mill, But is not limited thereto.

A torrefied wood chip is crushed in a crusher and then conveyed to a cyclone. The air is separated from the powder and air in a back filter, The powder may be combined with a cyclone and sent to a siever.

At this time, it is preferable that a torrefied wood chip having a mean particle size of 170 mesh or more selected from a sieve is sent to a crusher for recycling.

A process flow diagram of a mixer and a molding machine according to an embodiment of the present invention is shown in Fig.

Specifically, the mixer is preferably used including at least one selected from a kneader mixer, a paddle mixer, and a screw mixer, but is not limited thereto.

Specifically, the molding machine preferably includes at least one selected from a single screw extruder, a twin screw extruder, and the like, but is not limited thereto. The molding can be extrusion-molded by means of a pellet or the like by a conventional method, but is not limited thereto. The molding machine may further include a cooler and a dryer.

A process flow chart of a carbonation reactor according to an embodiment of the present invention is shown in FIG.

Specifically, the carbonylation reactor is preferably in the form of a cylindrical rotary kiln, but is not limited thereto.

The carbonization of the carbonization reactor is preferably carried out at 200 to 500 ° C. for 5 to 180 minutes, more preferably at 240 to 320 ° C. for 10 to 60 minutes using the gas supplied from the semi- May be preferred. At this time, a high concentration of hydrocarbon gas may be further supplied and used. The hydrocarbon gas may include any one or two or more gases selected from methane (CH ₄ ) and acetylene (C ₂ H ₂ ).

The carbonation reactor may include a gas supply valve for regulating the gas introduced into the carbonization reactor and the gas supplied to the combustor in the semi-carbonation reactor, and a programmable logic controller (PLC) And a sensor, such as a pressure sensor, a temperature sensor, and a gas flow rate sensor.

The carbonization reactor may further comprise a cooler.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a high calorie carbon pellet according to the present invention, and a method and an apparatus for producing the same will be described in more detail. It should be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In addition, the following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms, and the drawings presented below may be exaggerated in order to clarify the spirit of the present invention.

Also, the singular forms as used in the specification and the appended claims are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The physical properties of the samples prepared by the following examples and comparative examples were measured as follows.

Elemental analysis

And analyzed using an automatic element analyzer (Elemental Analyzer 2400 Series II, perkin Elmer USA).

Low calorific value ( LHV , Kcal / kg)

The lower calorific value was calculated by the following formula.

(LHV) = C content (%) × 7837.5 + H ₂ content (%) × 3211 - O ₂ content (%) / 8 × 3211 + S content (%) × 2216

Yield

The mass yield of the carbonized pellets was measured by measuring the small amount of the weight.

Mass yield (%) = mass of pellet after carbonization / mass of pellet before carbonization × 100

Energy Yield (%) = Pellet lower calorific value after carbonization / Low calorific value before carbonization × Mass yield

Energy Density = energy yield / mass yield

[ Manufacturing example  1] nano metal catalyst solution

500 ml of distilled water was added to a four-necked flask equipped with a stirrer, and 7% by weight of gelatin was added thereto, followed by stirring at 40 ° C for 4 hours. 5 ml of Tween-20 (Sigma-Aldrich, USA) as polysorbate 20 was added as a surfactant. 35 g of FeSO ₄ · 7H ₂ O (iron (II) sulfate heptahydrate), which is a metal hydrate, was dissolved in 100 ml of distilled water and stirred for 1 hour using a separatory funnel. Thereafter, 20% by weight of hexamethylenetetramine (Hexamine, Junsei, Japan) was added as a reducing agent, 90 g was added thereto, and the pH was adjusted to 3.5 with citric acid, followed by a reduction reaction at 90 ° C for 1 hour. Thereafter, the solution was adjusted to pH 5 with citric acid as a stabilizer to prepare a nano-metal catalyst solution which was a transparent brown Fe-adsorbed micelle.

[ Example  1] Carbonization Pellets  Produce

100 kg of wood was peeled and cleaned, and then 90 kg of wood chips having a size of 7 x 7 mm and a thickness of 4 mm were produced. The wood chips thus prepared were placed in a semi-carbonization reactor of a rotating drum type continuous reactor system and heated at 250 ° C for 30 minutes in an atmosphere of nitrogen gas under anoxic condition by an indirect heating method to cause a half-carbonation reaction. At this time, the semi-carbonation reactor kept the negative pressure within -0.049 kPa, which is -5 mmH ₂ O, to block air inflow from the outside. The semi-carbonized wood chips were cooled to 40 캜 in a nitrogen atmosphere and then powdered using a fin crusher with an average particle size of 170 mesh.

To 100 parts by weight of the semi-carbonized wood chip powder, 10 parts by weight of charcoal having an average particle size of 170 mesh as an additive was firstly mixed using a screw mixer. To 100 parts by weight of the semi-carbonized wood chip powder, 15 parts by weight of starch was used as a binder, and 5 parts by weight of the nano-metal catalyst solution prepared in Preparation Example 1 was used for secondary mixing. . The mixture was extruded at a pressure of 1000 kg / cm < 2 > using a twin screw extruder to prepare pellets.

The pellets were carbonized at 220 DEG C for 15 minutes in a carbonylation reactor of a cylindrical rotary kiln to prepare carbonized pellets. The reaction conditions, elemental analysis and low calorific value data of the carbonization reaction are shown in Table 1.

[ Example  2]

Except that carbonization was carried out at 220 ° C for 30 minutes.

[ Example  3]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 220 ° C for 45 minutes.

[ Example  4]

Except that carbonization was carried out at 220 ° C for 60 minutes.

[ Example  5]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 250 ° C for 15 minutes.

[ Example  6]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 250 ° C for 30 minutes.

[ Example  7]

Except that carbonization was carried out at 250 DEG C for 45 minutes.

[ Example  8]

Except that carbonization was carried out at 250 ° C for 60 minutes.

[ Example  9]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 280 DEG C for 15 minutes.

[ Example  10]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 280 DEG C for 30 minutes.

[ Example  11]

All the steps were carried out in the same manner as in Example 1 except that the carbonization was carried out at 280 DEG C for 45 minutes.

[ Example  12]

All the steps were carried out in the same manner as in Example 1, except that the carbonization was carried out at 280 DEG C for 60 minutes.

[ Comparative Example  1] Carbonization without using nano metal catalyst solution Pellets  Produce

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  2]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  3]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  4]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  5]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  6]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  7]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  8]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  9]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  10]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  11]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

[ Comparative Example  12]

Except that the nano-metal catalyst solution prepared in Preparation Example 1 was not used.

division Carbonization temperature
(° C) Carbonization time
(min) C (%) H (%) S (%) LHV
(kcal / kg) Untreated wood chip 47.62 6.55 0.01 3942.54 Example 1 220 ℃ 15 59.53 5.09 0.71 4829.26 Example 2 30 60.72 4.99 0.72 4919.32 Example 3 45 61.48 4.55 0.69 4964.75 Example 4 60 73.12 4.55 0.68 5877.03 Example 5 250 ℃ 15 74.06 4.20 0.60 5939.45 Example 6 30 74.71 4.11 0.59 5987.50 Example 7 45 79.53 3.98 0.59 6361.09 Example 8 60 81.38 3.98 0.56 6506.08 Example 9 280 ℃ 15 91.95 3.50 0.51 7319.08 Example 10 30 95.19 3.13 0.50 7561.13 Example 11 45 96.95 2.62 0.47 7682.69 Example 12 60 95.03 3.14 0.48 7548.91 Comparative Example 1 220 ℃ 15 49.53 7.09 0.72 4109.73 Comparative Example 2 30 50.72 6.99 0.73 4199.79 Comparative Example 3 45 51.48 6.55 0.01 4245.22 Comparative Example 4 60 51.12 6.55 0.69 4217.00 Comparative Example 5 250 ℃ 15 55.06 6.20 0.61 4514.55 Comparative Example 6 30 55.71 6.11 0.10 4562.60 Comparative Example 7 45 60.53 5.98 0.10 4936.19 Comparative Example 8 60 62.38 5.98 0.57 5081.18 Comparative Example 9 280 ℃ 15 69.95 5.50 0.52 5659.05 Comparative Example 10 30 73.19 5.13 0.51 5901.10 Comparative Example 11 45 74.95 4.62 0.48 6022.66 Comparative Example 12 60 73.03 5.14 0.49 5888.88

Table 1 is a table showing elemental analysis and low calorific value (LHV). As shown in Table 1, Examples 1 to 12 show that the carbon content is increased up to 96% by weight, and the lowest calorific value is 7685.69 kcal / kg at the maximum.

In Comparative Examples 1 to 12, since the nano-metal catalyst solution is not included, it can be seen that the carbon content is at most 74% by weight and the low calorific value is 6022.66 kcal / kg, which is lower than that of the embodiment. It can be confirmed that the carbon content and the calorific value are increased by modifying the carbonized pellet through the carbonization reaction after adding the nano metal catalyst solution.

Mass yield (%) Energy yield (%) Energy density Example 1 90.18 111.65 1.24 Example 2 85.95 106.41 1.24 Example 3 86.86 110.68 1.27 Example 4 80.03 119.29 1.49 Example 5 72.46 109.16 1.50 Example 6 70.61 107.23 1.52 Example 7 62.87 101.44 1.61 Example 8 61.21 101.06 1.65 Example 9 50.25 93.28 1.85 Example 10 42.19 80.91 1.92 Example 11 38.94 75.88 1.94 Example 12 37.26 71.34 1.91 Comparative Example 1 87.57 98.89 1.13 Comparative Example 2 75.73 87.09 1.15 Comparative Example 3 78.18 83.34 1.13 Comparative Example 4 73.63 82.46 1.12 Comparative Example 5 65.22 36.62 1.21 Comparative Example 6 63.55 77.53 1.22 Comparative Example 7 56.60 76.97 1.36 Comparative Example 8 55.09 78.22 1.42 Comparative Example 9 44.22 71.63 1.62 Comparative Example 10 37.13 62.75 1.69 Comparative Example 11 34.27 58.26 1.70 Comparative Example 12 32.79 55.42 1.69

Table 2 is a table showing mass yield, energy yield and energy density. As shown in Table 2, it can be seen that the energy density of Examples 1 to 12 increases with the increase of the carbonization reaction temperature. In particular, Examples 9 to 12 show high energy densities.

In the case of Comparative Examples 1 to 12, it can be confirmed that the nano-metal catalyst solution is not included and the energy density value is relatively low.

[ Experimental Example  1] of cellulose Pyrolysis product  Change analysis

The thermal decomposition products of cellulose, hemicellulose and lignin before and after addition of woody biomass to nano-metal catalyst solution were analyzed by GC / MS (Agilent HP6890, G1350A). The column used was HP-1 Capillary Column 50 m × 0.2 × 0.33 μm and helium (He) was used as carrier gas. The flow rate was 0.7 ml / min, the sprit ratio was 100: 1, and the oven temperature was 40 ° C to 300 ° C and the temperature increase rate was 5 ° C / min. The cellulose used in the experiment was Aldrich, the hemicellulose was Sigma, and lignin (Westvaco No. 03155) was used.

Reaction temperature (캜) Carbonation reaction of cellulose Before addition After addition 300 Furfural
2-Furancarboxaldehyde, 5-methyl-5-hydroxymethylfurfural
2-Hyrdoxymethylfurfural
2-Cyclopenten-1-one, 2-Hydroxy-3-methyl-2-cyclopenten-1-
2-Methyl-2-cyclopenten-1-one,
2,3-Dimethyl-1,2-cyclopentanedione
1-Hydroxy-2-butanone
2-Butanone
1- (acetyloxy) -2-propanone (4-hydroxy-3-methoxyphenyl) -3-octanone
Ethanone,
1- (2-furanyl)
Phenol
Catechol
1,2-Benzenediol,
3-methyl-1,2-benzenediol,
4-methyl-Creosol
Phenol, 2-methoxy-Aldehydes
Esters
Alcohols
2-Hydroxy-3-methyl-2-cyclopenten-1-one
1,2-Benzenedicarboxylic acid dinonyl ester
Phenol
2-Methyl benzofuran
1,2-Benzenedicarboxylic acid,
dibutyl ester
3-Methyl cyclopent-2-enone
2-Acetyl-5-methylfuran
2,3-Dimethyl-2-cyclopent-1-one
2-Methyl phenol (o-cresol)
3-Methyl phenol (m-cresol)
2-Methyl benzofuran
3,4-Dimethyl-1H-indazole
2-Ethyl-5-methylfuran
1,4-Dimethy benzene (p-xylene)

Table 3 is a table showing changes in pyrolysis products due to the carbonization reaction of cellulose according to the addition of the nano-metal catalyst solution. As shown in Table 3, it can be seen that phenols and furan compounds were produced in the thermal decomposition products of cellulose. The formation of a large amount of phenols is attributed to the breakdown of β-1,4 linking, which is the major bond of cellulose, due to the attack of free radicals generated at the same time as the reaction temperature is increased. At the same time, the degradation reaction, cyclization reaction and condensation The reaction was initiated to produce various kinds of aromatic compounds, and the amount of the condensed ring compound was increased, and it was confirmed that various aromatic compounds were produced by the decomposition of cellulose.

Reaction temperature (캜) Pyrolysis of hemicellulose by carbonization reaction Before addition After addition 300 2,5-Dihydroxypropiophenone
(E, E) 2,5-Diphenyl-2,4-hexadiene
1,2-Benzenedicarboxylic acid
dinonyl ester
4,4-Dimethyl-2-cyclopentene-1-one
2,3-Dimethyl-2-cyclopenten-1-one
2-Methyl phenol
2-Methyl-cyclopentanone
2, 3,4-Trimethyl-2-cyclopentan-1-one
2-Propyl-2-cyclohexenone
2,5-Dimethyl cyclopentanone C3-Benzene
2,4-Dimethyl phenol
2,4,6-Trimethyl phenol 4,4-Dimethyl-2-cyclopenten-1-one
2,3-Dimethyl-2-cyclopenten-1-one
2-Methyl phenol
2-Methyl-cyclopentanone
2,3,4-Trimethyl-2-cyclopentan-1-one
2-Propyl-2-cyclohexenone
2,5-Dimethyl cyclopentanone
C3-Benzene
2,4-Dimethyl phenol
2,4,6-Trimethyl phenol

Table 4 is a table showing changes in thermal decomposition due to the carbonization reaction of hemicellulose upon addition of the nano-metal catalyst solution. As shown in Table 4, pyrolysis products obtained by the carbonization reaction of hemicellulose can identify phenols, benzenes, and the like. In addition, a large number of aliphatic compounds are analyzed by aldehydes and ketones, and a large amount of ketones and aldehydes can be produced by the oxidation reaction or the dehydrogenation reaction of the hydroxyl group constituting the polysaccharide hemicellulose. On the other hand, the components related to the formation of formaldehyde and acetic acid by the decomposition of xylose, a kind of hemicellulose, were not analyzed, but it was confirmed that various aldehydes and organic acids such as benzoic acid, have.

Reaction temperature (캜) Pyrolysis of lignin by carbonization reaction Before addition After addition 300 Phenol
4-Methylphenol
2-Methoxyphenol
2-Methoxy-4-methylphenol
4-Ethyl-2-methoxyphenol
2-Methoxy-4-vinylphenol
2-Methoxy-4- (2-propenyl) phenol
2-Methoxy-4-propylphenol
3-Hydroxy-4-methoxybenzaldehyde
2-Methoxy-4- (1-propenyl) phenol
2-Methoxy-4-propylphenol
1- (4-Hydroxy-3-methoxyphenyl) -ctanone 4-Methly-phenol
1,2-Dimethoxy benzene
2,3-Dimethoxy toluene
2-Methoxy phenol (O-cresol)
3-Methoxy phenol (m-cresol)
2,4-Dimethyl-phenol
3-Methyl-1,2-benzenediol
4-Methyl catechol
4,5-Dimethyl-1,3-benzenediol
Dehydroabietic acid [1,2,3,4,4,4a, 9,10,10a-octahyro-1,4a-Dimethyl-7- (methylethyl) -1-phenanthrene-carboxylic acid]

Table 5 shows changes in pyrolysis products due to the carbonization reaction of lignin upon addition of the nano-metal catalyst solution. As shown in Table 5, various aromatic substances such as methoxy benzene, 1-methoxy-4-methyl benzene, o-cresol, m-cresol, 2.4-dimethyl phenol and 1,4-dimethoxy benzene are produced have.

At the reaction temperature of 200 ° C, lignin decomposition was extremely low. 4-Methylphenol, 1- (4-hydroxy-3-methoxyphenyl) -ethanone and 4-hydroxy-3 -methoxy benzeneacetic acid and the like were detected and the decomposition of lignin was started.

4-hydroxy-3-methoxy-benzeneacetic acid was the most abundant at the reaction temperature of 250 ° C and 2-methoxy-4a- (1-propenyl) phenol, 1- (4-hydroxy-3-methoxyphenyl) -ethanone, etc. are generated at about 250 ° C, and disappear with increasing temperature to 300 ° C.

(4-methylphenol), 1,2-demethoxy benzene, and 2,3-demethoxy toluene at 300 ° C, and the amount of phenol was gradually increased with increasing reaction temperature. Was generated in a small amount.

At the reaction temperature of 250 ° C, 2-methoxy-4-propylphenol 1.8% by weight, 2-methoxy-4-ethylphenol 1.7% by weight and 2-methoxy-4 -ethyl phenol was 0.8 wt%, respectively.

At 300 ℃, methyl guaiacol, ethyl guaiacol and propyl guaiacol, which had lower molecular weights, were found to be higher in order. This phenomenon means that as the reaction temperature increases, the rate at which oligomers generated earlier are converted to coniferyl alcohols is faster than the rate at which oligomers generated by depolymerization of lignin with macromolecular structures increase. , And it can be confirmed that the phenomenon that the alkyl group portion of the structure of guaiacol species is sequentially decomposed by the free radicals and converted into the substance of the molecule is distinct compared with other decomposition reactions.

When the reaction temperature reached 300 ° C or more, methyl guaiacol, ethyl guaiacol, and propyl guaiacol were produced, and 2-methoxyphenol (guaiacol) was decomposed to decrease the concentration. As shown in Table 5, .

At 300 ℃, guaiacols showed a tendency to decrease, but unlike pyrolysis, no complete disappearance was observed, and cresols and dimethyl phenols were formed as main products.

In the case of cresol, the production of p-cresol, which has been confirmed to be produced at 300 ° C., was analyzed to be o-cresol and m-cresol as the highest concentrations at 350 ° C., Respectively. According to this phenomenon, when the pyrolysis reaction is used, the bonding and destruction conditions of the ether bond of the methoxy group, namely, the methyl C-0 bond, that is, the methyl aryl ether, were determined to be 300 ° C. or higher. The decomposition pathway of oxygen containing functional groups in the lignin structure is considered to be important when considering the generation of oxygen fuel materials.

The aliphatic CO bond of the methoxy group has the weakest binding energy and is most easily decomposed by heat. Pyrocatechol and methane can be formed by decomposition of this bond, but this reaction also shows a low selectivity of less than 20% .

Considering the structural change through observation of the change in the content of the degradation products, as the simultaneous decomposition and recombination occurring in a large number of variables and complex lignin structures proceed, the lignin decomposition mechanism and the decomposition degree of the lignin are accurately measured Although it is impossible to explain it, it can be seen that the aliphatic CO bond of the methoxy group, which is the weakest bond in the guaiacyl unit, constitutes the precursor of lignin.

On the other hand, the formation of phenanthrene and indene species was confirmed by the increase of the reaction temperature. These substances were produced not by direct depolymerization of lignin but by condensation of aromatic substances which were produced in the past. .

The decomposition of lignin through pyrolysis shows that the production of benzene, phenol and toluene by decomposition of aromatic substituents is very low and the increase of the production of low molecular weight aliphatic hydrocarbons is extremely low, It can be confirmed that the amount of the cyclic aromatic structure, the cyclic carbon structure and the side chain compound, is gradually increased.

This phenomenon can be judged by the fact that the intermediate products of the structure containing the free radical in the aromatic main body are formed through the coupling reaction with each other. As a method for thermochemical conversion of lignin, there is no phenomenon of opening of the first produced aromatic substance through the pyrolysis process. Therefore, up to a certain level, It can be confirmed that the production of the structural carbon structure is increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of example, Various changes and modifications may be made by those skilled in the art.

Claims (22)

Semi-carbonizing the wood under anaerobic conditions,
Crushing the semi-carbonized wood and pulverizing it,
Pelletizing a mixture comprising semi-carbonized wood powder, a binder and a nano-metal catalyst solution, and
Carbonizing the molded pellets,
By weight. The method according to claim 1,
Wherein the semi-carbonization step is performed at 180 to 400 ° C for 5 minutes to 180 minutes. The method according to claim 1,
Wherein the carbonizing step comprises carbonizing by supplying a component generated in the step of semi-carbonizing. The method according to claim 1,
Wherein the carbonization is carried out at 200 to 500 DEG C for 5 to 180 minutes. The method according to claim 1,
Wherein the wood further comprises peeling the wood. The method according to claim 1,
Further comprising the step of grinding the wood to produce a wood chip. The method according to claim 1,
Wherein the mixture further comprises any one or two or more additives selected from starch, sawdust, charcoal, activated carbon, fruit husk, grain husk and coffee bean. 8. The method of claim 7,
The additive And 0.1 to 100 parts by weight per 100 parts by weight of the semi-carbonized wood chip powder. The method according to claim 1,
Wherein the binder comprises any one or a mixture of two or more selected from carboxymethyl cellulose, polyvinyl alcohol, molasses and starch. The method according to claim 1,
Wherein the nano-metal catalyst solution comprises at least one selected from a nano-metal catalyst, a surfactant, a reducing agent, and a stabilizer. 11. The method of claim 10,
Wherein the nano metal catalyst comprises any one or a mixture of two or more selected from the group consisting of a metal, a metal oxide, a metal hydrate, a metal hydroxide, a metal carbide and a metal nitride. 11. The method of claim 10,
Wherein the nano-metal catalyst has an average particle diameter of 0.1 to 50 nm. 11. The method of claim 10,
The nano metal catalyst Wherein 0.01 to 5 parts by weight are contained per 100 parts by weight of the semi-carbonized wood chip powder. The method according to claim 1,
Wherein the carbonized pellets have a water content of 5 to 30% by weight relative to the semi-carbonized wood chip powder. 6. The method of claim 5,
Further comprising the step of burning by-products generated in the step of peeling the wood and the gas generated in the step of carbonizing the carbonized pellets. 16. The method of claim 15,
Wherein the heat source generated in the step of burning is used in the step of semi-carbonizing and carbonizing the high-temperature carbonized pellets. A high calorific carbon pellet having a carbon element content of 50 to 99% and a low calorific value of 4500 to 8000 kcal / kg. A semi-carbonization reactor for semi-carbonizing wood under anoxic condition,
A crusher for crushing and pulverizing semi-carbonized wood,
A mixer for mixing semi-carbonized wood powder with a binder and a catalyst,
A molding machine for pelletizing the mixture and
A carbonization reactor for carbonizing the pellets,
Wherein the high-purity carbonized pellet is produced by mixing the high- 19. The method of claim 18,
Further comprising a bark eliminator for peeling the wood. 19. The method of claim 18,
A system for producing high calorie carbonized pellets, further comprising a wood chip maker for producing wood from chips. 20. The method of claim 19,
Further comprising a combustor which is supplied with exhaust gas from a carbonization reactor and is supplied with wood byproducts from the bark eliminator and burns and supplies a heat source generated through combustion to a semi-carbonization reactor and a carbonization reactor. 20. The method of claim 19,
Further comprising a dryer for drying wood byproducts supplied from the bark eliminator.

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