Abstract: A self-heating sealant or adhesive may be formed using multi-compartment microcapsules dispersed within a sealant or adhesive. The multi-compartment microcapsules produce heat when subjected to a stimulus (e.g., a compressive force, a magnetic field, or combinations thereof). In some embodiments, the multi-compartment microcapsules have first and second compartments separated by an isolating structure adapted to rupture in response to the stimulus, wherein the first and second compartments contain reactants that come in contact and react to produce heat when the isolating structure ruptures. In some embodiments, the multi-compartment microcapsules are shell-in-shell microcapsules each having an inner shell contained within an outer shell, wherein the inner shell defines the isolating structure and the outer shell does not allow the heat-generating chemistry to escape the microcapsule upon rupture of the inner shell.

Abstract: The present application relates to a curable composition, a cured product and use of the curable composition and cured product. An exemplary curable composition may form a cured product having low permittivity and an excellent adhesive property, and thus may be usefully used for direct bonding of a variety of optical functional members of display devices, for example, direct bonding of a touch panel and a display panel.

Abstract: The present invention relates to the use of a hot-melt adhesive for adhesive bonding of at least a first packaging and a second packaging, the hot-melt adhesive comprising: (a) 7-70 parts per weight, preferably 20-60 parts by weight, more preferred 30-50 parts per weight, even more preferred 35-45 parts by weight, of a polymer component, the polymer component comprising a first styrene block copolymer and a second styrene block copolymer, the first styrene block copolymer and the second styrene block copolymer having a different styrene content, (b) 15-60 parts per weight, preferably 25-50 parts per weight, even more preferred 35-45 parts per weight, of a tackifying component; (c) 5-30 parts per weight, preferably 5-25 parts per weight, of a plasticizer component; and d) 0.02-1.2 parts per weight of a stabilizer component.

Abstract: The present invention relates to a biomedical device for the distribution or containment of biological substances comprising at least two components assembled each other with an adhesive composition comprising a mixture of an acrylic adhesive composition and an epoxy adhesive composition. The present invention also relates to a method for assembling a biomedical device comprising at least two components, comprising (i) forming a film of an adhesive composition comprising a mixture of a (meth)acrylate adhesive composition and an epoxy adhesive composition on at least one surface of said at least two components, (ii) pre-curing said adhesive composition with an UV-blue radiation exposure to substantially cure said (meth)acrylate adhesive composition without substantially curing said epoxy adhesive composition, (iii) contacting said at least one surface of said at least two components to be assembled, and (iv) completing the curing of said adhesive composition with an UV-blue radiation exposure.

Abstract: A urethane adhesive composition of the present technology contains: a urethane prepolymer having isocyanate groups; and a monosulfide compound which has a monosulfide bond and a hydrolyzable silyl group and in which the monosulfide bond and a silicon atom in the hydrolyzable silyl group are bonded to each other.

Abstract: A one-component structural adhesive comprising an isocyanate-terminated prepolymer having polymerized residues of: (a) 40 to 95 wt % of a polytetramethylene ether glycol; and (b) 5 to 60 wt % of an aliphatic diisocyanate.

Abstract: A branched polyorganosiloxane having, on average, at least two radical-curable groups per molecule and a curable silicone composition that comprises (I) the branched polyorganosiloxane and (II) a radical initiator. Cured products prepared therefrom. Devices containing the branched polyorganosiloxane, composition, or cured product. Methods of making the branched polyorganosiloxane and composition and methods of using and uses of the materials and devices.

Abstract: Methods of and systems for dispensing dust suppressant are provided. The methods comprise forming an aqueous dispersion stream by delivering a surfactant composition to an aqueous liquid stream. The aqueous dispersion stream is mixed to form a dust suppressant. The dust suppressant is dispensed to a surface at a pressure sufficient to provide coverage of the surface. Surface tension of the dust suppressant is measured via a tensiometer, and the measurement is relayed to a controller. The forming of the aqueous dispersion stream is adjusted according to the measured surface tension relayed to the controller. The systems are configured to carry out one or more of the provided methods.

Abstract: The group of inventions relates to the field of organic chemistry and can be used for collecting films of petroleum, oils, mazut, fuels, hydrocarbons and other petroleum products with the aim of cleaning the surface of water, and also for cleaning water flows which have been contaminated by petroleum or petroleum products. A substance for collecting petroleum or petroleum products from the surface of water includes a natural polymer and additionally includes a biodegradable surfactant in the form of an aqueous solution with a concentration of no less than 0.1 g/L, and, as the natural polymer, contains polysaccharide microgels having a mass of between 20,000 and 200,000 daltons and a particle size of between 50 and 600 nm in the form of an aqueous solution with a concentration of no less than 0.2 g/L, wherein the ratio of polysaccharide microgels to biodegradable surfactant is between 12:1 and 2:1.

Abstract: A non-azeotropic refrigerant mixture attains an extremely low temperature of ?200 deg. C. through ?150 deg. C. in a refrigerating system equipped with a heat exchanger; a non-azeotropic refrigerant mixture which attains a low temperature of ?100 deg. C. or lower is a non-azeotropic refrigerant mixture which comprises a base refrigerant and R-14 wherein R-14 is contained in an amount of 5 wt % through 40 wt %, whereas the base refrigerant consists of butane plus propane and R-23 plus R-116 as the low boiling point refrigerant; also, a non-azeotropic refrigerant mixture that attains ?120 deg. C. or lower is a non-azeotropic refrigerant mixture which comprises R-50 plus R-740 as well as a base refrigerant and R-14 wherein the base refrigerant/R-14 ratio is 95/5 through 60/40 and R-50 and R-740 are contained respectively in an amount of 1 wt % through 10 wt.

Abstract: In accordance with one aspect, a material for energy management and peak energy reduction in a building structure, comprises an insulative base material, a first phase change material, and a functional polymeric phase change material that dynamically absorbs and releases heat to adjust heat transfer at or within a temperature stabilizing range. The functional polymeric phase change material has at least one phase change temperature in the range between ?10° C. and 100° C. and a phase change enthalpy of at least 5 Joules per gram, the functional polymeric phase change material including a plurality of polymer chains that include a backbone chain and a plurality of side chains, wherein a first portion of the plurality of polymer chains are crosslinked to each other, wherein a second portion of the plurality of polymer chains are crosslinked with the first phase change material and a third portion of the plurality of side chains are mechanically entangled with the inorganic insulative base material.

Abstract: The present invention provides a process to extract liquid dielectric coolant from the rice bran oil, which is suitable for both power frequency and high frequency electrical applications. The process comprises the steps of, processing the refined, bleached and deodorised rice bran oil with an alkali to remove the fatty acids. After processing the rice bran seed oil, at step, the processed rice bran oil is blended with a Sodium Hydroxide (NaOH) solution. The blended rice bran oil forms a top layer and a bottom layer within short duration of time. At step, the top layer is extracted and is water washed and filtered. At step, the top layer rice bran oil is mixed the Tert Butyl Hydroxy Quinone solution. Finally, at step, the mixture of filtered top layer and Tert Butyl Hydroxy Quinone solution is heated to extract the liquid dielectric coolant.

Abstract: A method for degrading a downhole article includes exposing the downhole article comprising a controlled electrolytic material to a composition that comprises a reducing agent. The method also includes contacting the downhole article with the reducing agent to degrade the downhole article. Additionally, a composition for degrading a downhole article includes water, chelant, metal ions, and a reducing agent that includes ascorbic acid, erythorbic acid, a derivative thereof, a salt thereof, or a combination thereof.

Abstract: Cement compositions may contain a cement component and an oil-immiscible solvent and used in a number of cementing applications. In another aspect, methods for sealing subterranean zones may include emplacing a cement composition into a wellbore containing a cement component and an oil-immiscible solvent, contacting the cement composition with a water source, and reacting the cement composition with the water source to form a hardened cement.

Abstract: The invention provides compositions and methods for sealing subterranean spaces such as natural or induced fractures, vugs or annular spaces. The composition is composed of a base fluid consisting of a soluble alkali silicate, a gas generating additive, solids and a setting agent. The gas generating additive may be coated or uncoated. The gas generating additive may also be in the form of a slurry. In the case of coated additives, the coating may act as a retarder or an accelerator to the expansion and setting agent of the soluble alkali silica. Similarly, the choice of carrier fluid in a slurry may retard or accelerate the expansion and setting of the alkali silicate-based plug.

Abstract: Disclosed are traceable polymeric additives that comprise a tagging material and methods of using the traceable polymeric additives in subterranean applications, such as cementing. An embodiment discloses a well treatment composition comprising a base fluid and a traceable polymeric additive comprising a polymer and a tagging material.

Abstract: Disclosed are traceable polymeric additives that comprise a tagging material and methods of using the traceable polymeric additives in subterranean applications, such as cementing. An embodiment discloses a well treatment composition comprising a base fluid and a traceable polymeric additive comprising a polymer and a tagging material.

Abstract: Disclosed herein are cement compositions using set-delayed cement compositions in subterranean formations. The composition may comprise a set-delayed cement composition comprising pumice, hydrated lime, a cement set retarder, a synthetic smectite, and water.

Abstract: The invention discloses representative compositions for and methods of effective scale inhibitor treatments at temperatures below about 0° C. The compositions used according to the method function to prevent scale formation over a wide range of temperatures. Further, the compositions are compatible with a broad range of additives.

Abstract: Systems and methods for creating surfactant-polyelectrolyte complexes at a well site are provided. In one embodiment, the methods comprise: providing a first solution comprising at least one surfactant and a second solution comprising at least one polyelectrolyte; using a stop-flow mixing apparatus at a well site to mix the first and second solutions to form one or more surfactant-polyelectrolyte complexes; using a low-dose pumping apparatus at the well site to transfer the one or more surfactant-polyelectrolyte complexes from the stop-flow mixing apparatus to a blending apparatus at the well site; using the blending apparatus to mix the one or more surfactant-polyelectrolyte complexes with an aqueous base fluid to form a treatment fluid; and introducing the treatment fluid into a well bore penetrating at least a portion of a subterranean formation at the well site.

Abstract: Treatment fluids comprising methane sulfonic acid (MSA) and fully protonated N-(phosphonomethyl)iminodiacetic acid (PMIDA) solubilized in the MSA. Methods including introducing the treatment fluids into a wellbore in a subterranean formation comprising acid-soluble material at a first treatment interval, and reacting the MSA and the PMIDA in the treatment fluid with the acid-soluble material at a temperature in the range of about 65° C. to about 210° C., wherein the reacting removes the acid-soluble material, thereby forming conductive channels in the subterranean formation.

Abstract: A relatively low density, high strength round proppant material having (i) a round core made of a sintered mixture of fly ash and clay or, in same instances, fly ash, clay, and bauxite; and (ii) an outer shell made of sintered bauxite, and a method of making the same.

Abstract: In order to address the problems of conventional photochromic compounds, which are the insufficient coloring/discoloring speed and durability exhibited thereby and the large number of production steps, the present invention provides a photochromic compound that exhibits a high speed coloring/discoloring reaction and high durability while it is able to be synthesized in low cost, and that has industrial applicability. The compound of the present invention is characterized by the insertion of a diarylimidazolyl radical into the ortho position of an aryl group. The compound exhibits photochromic properties, and achieves a photochromic compound having both a high speed color switching reaction and high durability. Furthermore low cost synthesis is possible, and the photochromic compound has industrial applicability.

Abstract: A method of manufacturing a surface-treated phosphor (11) in which the surface of an alkaline-earth silicate phosphor (12) containing a silicate of alkaline-earth metal is covered with a surface treatment layer (13), the method comprising: surface treatment which brings the alkaline-earth silicate phosphor (12) and a surface treatment substance into contact in the presence of at least a kind of polyol selected from the group of diols and triols to form the surface treatment layer (13) on the surface of the alkaline-earth silicate phosphor (12), the surface treatment substance being at least one selected from the group consisting of a sulfate, a phosphate, a carbonate, a borate, a boric acid, a titanate, and a fluoride.

Abstract: A method of producing a nitride fluorescent material having a high light emission intensity and including a calcined product having a composition represented by formula MavMbwMcxMdyNz is provided. Ma is at least one element selected from Sr, Ca, Ba, and Mg; Mb is at least one element selected from Li, Na, and K; Mc is at least one element selected from Eu, Mn, Tb, and Ce; Md is at least one element selected from Al, B, Ga, and In; v, w, x, y, and z satisfy 0.8?v?1.1, 0.8?w?1.1, 0.001<x?0.1, 2.0?y?4.0, and 3.0?z?5.0, respectively. The nitride fluorescent material includes elemental oxygen in a range of 2% or more and 4% or less by mass. The method includes mixing the calcined product with a polar solvent having a relative dielectric constant in a range of 10 or more and 70 or less at 20° C.

Abstract: Semiconductor nanocrystals and methods of making are provided.

Abstract: The subject is to show a liquid crystal display device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long service life and a small flicker rate. The means concerns a liquid crystal display device including a first substrate, a second substrate and a liquid crystal composition having positive dielectric anisotropy, which is placed between these substrates, wherein the liquid crystal composition has a nematic phase and includes at least one compound selected from the group of compounds represented by formula (1) as a first component: in formula (1), R1 is alkyl or the like; ring A is 1,4-phenylene or the like; Z1 is a single bond or the like; X1 and X2 is hydrogen or fluorine; Y1 is fluorine or the like; and m is 0, 1, 2, 3 or 4.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters R1-R3, Z21, Z31, Z32 and rings A11, A12, A13, A21, A22, A31, and A32 are as defined herein, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: In an aspect, an liquid crystal display including a first substrate, a second substrate facing the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate and including liquid crystals, a first alignment polymer, and a second alignment polymer is provided, In an aspect, the first alignment polymer is formed by radiating electromagnetic radiation on a first alignment aid photoreactive in a first wavelength region, the second alignment polymer is formed by radiating electromagnetic radiation on a second alignment aid photoreactive in a second wavelength region, and the first wavelength region and the second wavelength region are different from each other.

Abstract: A biochar and electric power generator that receives carbonaceous material and outputs variable amounts of electrical energy and char, including a pyrolysis module, a reaction module, and a char removal mechanism arranged between the pyrolysis module and the reaction module, an engine module including an engine and an alternator, configured to convert gaseous fuel produced by the reaction module into electric power and to provide waste heat to the pyrolysis module, and a flare configured to burn tar gas and to provide waste heat to the pyrolysis module.

Abstract: This method for roasting biomass, including the flow by gravity of the biomass from the top towards the bottom of a column (4) with a counter-current of hot gases flowing from the bottom towards the top of the column (4), with the establishment of an increasing temperature gradient from the top towards the bottom of the column (4), the recovery of the gases at the top of the column and their recycling at the bottom of the column (4) by way of a gas circuit (12) so that the gases flow in a closed loop in the column (4) and the gas circuit (12), and the heating of the gases recovered by passing them through a heat exchanger (16) before their recycling at the bottom of the column (4).

Abstract: The invention shows an apparatus for recycling bituminous material bodies by melting, in particular for recycling bituminous composite material bodies comprising a composite material and a bituminous material, in particular roofing materials, in particular in the form of bituminous covering layers of roofing sheets, the apparatus including: a vessel having a vessel wall surrounding an interior space of the vessel extending along a vertical axis of the vessel for receiving the bituminous material bodies, a bottom plate and a compression plate extending transverse to the vertical axis wherein at least the compression plate has a number of through flow orifices adapted to allow a through flow of molten bituminous material, wherein the plates are movable along the vertical axis such that in a first operating state the compression plate is in a middle position for forming a melting space of larger size between the compression plate and the bottom plate for melting bituminous material in the melting space wherei

Abstract: The present invention provides a process for producing liquid hydrocarbon products from a solid biomass feedstock, said process comprising the steps of: a) providing in a first hydropyrolysis reactor vessel a first hydropyrolysis catalyst composition, said composition comprising one or more active metals selected from cobalt, molybdenum, nickel, tungsten, ruthenium, platinum, palladium, iridium and iron on an oxide support, wherein the one or more active metals are present in an oxidic state; b) contacting the solid biomass feedstock with said first hydropyrolysis catalyst composition and molecular hydrogen in said first hydropyrolysis reactor vessel at a temperature in the range of from 350 to 600° C. and a pressure in the range of from 0.50 to 7.

Abstract: The invention relates to a use of a reversible molten salt for separating hydrocarbons, such as crude bitumen and/or heavy crude oil, from material comprising mineral solids. The invention relates also to a method comprising at least the steps of: (a) bringing a liquid phase comprising a reversible molten salt, preferably a reversible ionic liquid, in a contact with mineral solids comprising hydrocarbons and extracting hydrocarbons to the liquid phase from the mineral solids; (b) separating the mineral solids phase from the liquid phase, which comprises molten salt and hydrocarbons; (c) separating hydrocarbons from the liquid phase comprising molten salt; and (d) recycling the liquid phase comprising molten salt to step (a).

Abstract: A process for operating a bitumen froth treatment operation in turndown mode includes adding solvent to bitumen froth to produce diluted bitumen froth and separating it into diluted bitumen and solvent diluted tailings and in response to a reduction in bitumen froth flow recirculating part of the diluted bitumen into the bitumen froth and returning part of the solvent diluted tailings into the step of separating. A method for turndown of separation vessel for PFT includes sustaining the feed flow to vessel; maintaining solvent-to-bitumen ratio in the diluted bitumen froth; and retaining water, minerals and asphaltenes in a lower section of the vessel while sustaining an outlet flow. The use of diluted bitumen derived from PFT as a viscosity modifying agent of the bitumen froth and an associated process are also provided.

Abstract: Provided are a method and a device with which carbon dioxide is used as a starting material to yield methanol, without requiring high-temperature high-pressure conditions or the addition of hydrogen, and fuel hydrocarbons such as gas oil or heavy oil are produced in a satisfactory yield. The method is a method for increasing the amount of a hydrocarbon oil, characterized by: mixing methanol with water into which air has been bubbled in the presence of a catalyst; mixing the resultant liquid mixture with the feed hydrocarbon oil to produce an emulsion; and contacting this emulsion with a gas or aqueous solution which contains carbon dioxide.

Abstract: Methods are disclosed for converting a biomass-derived product containing levulinic acid and/or gamma-valerolactone to a transportation fuel precursor product containing diesel like hydrocarbons. These methods are expected to produce fuel products at a reduced cost relative to conventional approaches.

Abstract: A system for producing chemicals, such as, ethylene or gasoline, at high temperature (above 1100 degrees C.) having a feedstock source. The system includes a chemical conversion portion connected with the feedstock source to receive feedstock and convert the feedstock to ethylene or gasoline. The conversion portion includes a coil array and a furnace that heats the feedstock to temperatures in excess of 1100° C. or 1200° C. or even 1250° C. or even 1300° C. or even 1400° C. A method for producing chemicals, such as ethylene or gasoline, at high temperature.

Abstract: Present invention relates to a novel process for upgrading a residual hydrocarbon oil feedstock having a significant amount of Conradson Carbon Residue (concarbon), metals, especially vanadium and nickel, asphaltenes, sulfur impurities and nitrogen to a lighter more valuable hydrocarbon products by reducing or minimizing coke formation and by injecting fine droplets of oil soluble organo-metallic compounds at multiple elevations of the riser with varying dosing rates.

Abstract: A method and apparatus for upgrading a hydrocarbon feedstock is provided.

Abstract: A description is given of a process for hydrotreatment of at least one hydrocarbon feedstock having a weighted average temperature (WAT) of more than 380° C. using at least one catalyst containing at least one metal from Group VIB and/or at least one metal from Group VIII of the periodic table and a support containing an amorphous mesoporous alumina having a connectivity (Z) of more than 2.7, said hydrotreatment process operating at a temperature of between 250° C. and 430° C., at a total pressure of between 4 MPa and 20 MPa with a ratio of volume of hydrogen to volume of hydrocarbon feedstock of between 200 and 2 000 litres per litre and at an Hourly Volume Velocity (HVV) defined by the ratio of the volume flow of liquid hydrocarbon feedstock to the volume of catalyst fed into the reactor of between 0.5 and 5 h?1.

Abstract: A method for recovering synthetic oils from a feed stream, the method comprising separating at least a portion of the non-synthetic oil constituents from a commingled stream to produce a partially purified synthetic oil stream and one or more contaminant streams. Extracting at least a portion of the synthetic oil from the partially purified synthetic oil stream to produce a synthetic oil stream and a second contaminant stream.

Abstract: Embodiments provide a method and apparatus for recovering components from a hydrocarbon feedstock. According to at least one embodiment, the method includes supplying a hydrocarbon feedstock to an oxidation reactor, wherein the hydrocarbon feedstock is oxidized in the presence of a catalyst under conditions sufficient to selectively oxidize sulfur compounds and nitrogen compounds present in the hydrocarbon feedstock, separating the hydrocarbons, the oxidized sulfur compounds, and the oxidized nitrogen compounds by solvent extraction, collecting a residue stream that includes the oxidized sulfur compounds and the oxidized nitrogen compound, supplying the residue stream to a fluid catalytic cracking unit, and recycling liquid products produced by the fluid catalytic cracking unit to the oxidation reactor to selectively oxidize sulfur compounds in the liquid products, the portion of the liquids products including at least one of light cycle oils and heavy cycle oils.

Abstract: A method and kit for treatment of a stainless steel or other nickel alloy component utilized in a crude oil service operation including cleaning a surface of the component to remove surface contamination; drying the cleaned surface of the component; applying a coat of Self-Assembled Monolayer of Phosphonate (SAMP) to the cleaned and dried surface of the component to form a treated component; and installing the treated component into a section of a crude oil service operation. The coating reduces paraffin/asphaltene deposition on the component. The kit includes a cleaner wipe impregnated with a cleaning substance for cleaning the component; a nano-coating wipe impregnated with a SAMP for applying a nano-coating of the SAMP to the component; and instructions for treating said component utilizing the cleaner wipe and the nano-coating wipe.

Abstract: Methods for precipitating solids comprising asphaltenes and/or paraffins that may include precipitating the solid and contacting the solid with a surface comprising a Self-Assembled Monolayer of Phosphonate (SAMP) coating or alternatively may include precipitating the solid in the presence of such a surface. The method for treating a liquid containing contaminants comprising asphaltenes and/or paraffins may include inserting into the liquid, a surface as described above, or further coating surfaces within the liquid with a Self-Assembled Monolayer of Phosphonate (SAMP) coating.

Abstract: The present invention is related to a circulating fluidized bed gasification or combustion system (1) using coal or biomass as raw material and comprising a combustion/gasification reactor (2); a cyclone (3) which is in connection with the reactor (2) in order that solid particles are separated from gas flow; a downcomer (4) which is in connection with the reactor (2) and the cyclone (3), extends along the reactor (2), and enables solid particles captured by the cyclone (3) to be sent to the combustion/gasification reactor (2) again; a distributing plate (5) which is in connection with the reactor (2) and performs primary gas supply to the system (1) homogeneously; at least one conduit which is positioned parallel to the downcomer (4); an ejector (7) which is positioned on the downcomer (4) vertically, comprises at least one nozzle (6) spraying pressurized gas towards the reactor (2).

Abstract: A fluidized bed gasification system which comprises a fluidized bed gasification reactor having a bottom ash discharge outlet below the reactor, wherein an L-valve is used to control the rate of bottom ash discharge. The L-valve uses an aeration port located on distal side of the L-valve vertical pipe at a location that is above the center line of the horizontal pipe. Also provided are methods of controlling the bottom ash discharge as well the fluidized reaction bed height of the system.

Abstract: A gasifier may include a chamber wall defining a gasification chamber configured to allow gasification of feedstock material. The gasifier may also include an ash grate disposed in the gasification chamber. The gasifier may further include a rotary crusher disposed in the gasification chamber above the ash grate. The rotary crusher may include at least one crushing element. The rotary crusher may be configured to break apart, between the at least one crushing element and an opposing surface, the feedstock material responsive to rotation of the rotary crusher.

Abstract: The present invention relates to a process of increasing syngas production during an upgradation process of petroleum residual oil by circulation of rejuvenated upgrading material through a heat removal zone such as an Auxiliary Reformer and by regeneration of spent upgrading material.

Abstract: The present invention relates to a coal supply device for reducing dust of coal input for dry and supplying dispersing and supplying the coal in a system for drying coal using reheat steam, and more particularly, to a device to minimize dust when the coal is supplied to a multi-stage dryer from a coal constant feeder through a pulverizer in a multi-stage dryer for drying coal using reheat steam and disperse and supply the coal to a transfer device and a coal drying system in which coal which is primarily dried in the first coal dryer is inputted into the second coal dryer and thus is secondarily dried, includes a coal constant feeder supplying a predetermined amount of coal onto the upward surface of the first transfer plate; and a dust reducer constituted by an inlet pipe coupled to an outlet of the coal constant feeder by a bearing, a worm wheel coupled onto the outer periphery of the inlet pipe, a worm gear-coupled with the worm wheel and rotating with rotary force transferred from a motor, a curved pipe o