WO2015064996A1 - 재열증기를 이용한 석탄 건조 장치 - Google Patents
재열증기를 이용한 석탄 건조 장치 Download PDFInfo
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- WO2015064996A1 WO2015064996A1 PCT/KR2014/010159 KR2014010159W WO2015064996A1 WO 2015064996 A1 WO2015064996 A1 WO 2015064996A1 KR 2014010159 W KR2014010159 W KR 2014010159W WO 2015064996 A1 WO2015064996 A1 WO 2015064996A1
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- coal
- chain
- steam
- exhaust gas
- reheat steam
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
- F26B15/146—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts applying multiple superimposed tray conveyors, the materials to be dried being dropped onto subsequent conveyor stretches, e.g. by allowing the trays to tilt at one point
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2270/00—Specifically adapted fuels
- C10L2270/04—Specifically adapted fuels for turbines, planes, power generation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/06—Heat exchange, direct or indirect
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/10—Recycling of a stream within the process or apparatus to reuse elsewhere therein
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
- C10L2290/148—Injection, e.g. in a reactor or a fuel stream during fuel production of steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
Definitions
- the present invention relates to an apparatus for drying coal using reheat steam, and more particularly, to a coal drying apparatus having a multi-stage dryer for spraying and removing steam contained in coal used as fuel of a thermal power plant by reheat steam. It is about.
- coal-fired coal-fired power plants burn about 180 tons / hr of coal per 500 MW, and supply about 37 tons of coal to a boiler each quarter.
- the coal-fired 500MW coal-fired power plant is equipped with approximately six 500 tonnes of coal storage, five of which provide a normal supply of coal, and one reserve reserves for use over a period of time. It is operated by low coal.
- the standardized design criteria for coal is 6,080 Kcal / Kg and less than 10% low moisture bituminous coal.
- Some coal-fired power plants use imported coal, some of which have a mean water content of more than 17%, which reduces the combustion efficiency of the boiler. If the calorific value of coal used at the standardized combustion limit of 5,400 Kcal / Kg is low, the generation efficiency and fuel consumption are expected to decrease due to lower combustion efficiency.
- sub-bituminous coal which is a low-molecular coal with high moisture content, the water content is higher than the design standard, and the transfer system for transporting coal is not smooth. In some cases, however, the heat distribution in the boiler may be drift and operate in an abnormal state.
- the use of sub-bituminous coal has gradually increased from 41 to 60% in order to reduce fuel costs in thermal power plants.
- thermal drying is a rotary drying method of drying coal particles inside with a hot gas while rotating a shell of a cylinder into which coal is injected, and high temperature drying while supplying coal from top to bottom.
- Coal is divided into surface moisture attached to pores between coal particles and bonded moisture bonded to pores in coal.
- the surface moisture is mostly water sprayed during the washing process and transportation and storage in the mountain area, and the amount is determined according to the surface area and absorbency. The smaller the particles, the larger the surface area and the formation of capillaries between the particles. This increases the moisture content.
- the combined moisture is formed in the coal generator, and is followed by lignite, bituminous coal (bituminous coal, sub-bituminous coal) and anthracite coal. If the coal has a lot of moisture, the calorific value is lowered and the transportation cost is increased, so it is necessary to control the moisture in the process of mixing, crushing and separating coal.
- the present invention is to dry the coal used as fuel of the thermal power plant by reheat steam to maintain the proper moisture content of the coal to increase the calorific value of the coal, to improve the combustion efficiency of the thermal power plant boiler to reduce the fuel consumption
- the purpose is to.
- Another object of the present invention is to provide a drying technology and a technology applicable to a thermal power plant to prevent environmental problems caused by incomplete combustion of coal by controlling moisture contained in coal.
- the present invention provides a coal drying system, wherein a pair of first driving sprockets and a pair of first driven sprockets are separated by a predetermined distance and fastened to the first chains, respectively.
- a plurality of first transfer plates are hinged between the chains, and a pair of first guide rails horizontally supporting the first transfer plate is installed below the upper second chain connected between the first drive sprocket and the first driven sprocket.
- a pair of second guide rails for horizontally supporting the first transfer plate under the lower first chain connected between the first driving sprocket and the first driven sprocket, and supplied from the reheater under the upper first chain.
- a first steam chamber for injecting the reheated steam is installed, and a second steam chamber for injecting the reheat steam supplied from the reheater is installed under the lower first chain, and is doubled over the upper first chain.
- a pair of second driving sprockets and a pair of second driven sprockets are separated by a predetermined distance and connected to the second chains, and a plurality of second transfer plates are hinged and coupled between the second chains, and the second drive Below the upper second chain connected between the sprocket and the second driven sprocket, a pair of third guide rails for horizontally supporting the second feed plate is installed, and the lower second chain connected between the second driving sprocket and the second driven sprocket.
- a pair of fourth guide rails horizontally supporting the second transfer plate is installed below, and a third steam chamber for injecting the reheat steam supplied from the reheater is installed under the upper second chain, and the lower second A fourth steam chamber for injecting reheat steam supplied from the reheater is installed below the chain, and a third exhaust gas chamber for collecting exhaust gas is installed on the upper second chain, and the exhaust gas is trapped on the lower chain.
- a second coal dryer the fourth off-gas chamber is installed; And a third coal dryer installed below the second coal dryer to naturally dry the coal at room temperature while transferring the dried coal to the reheat steam.
- the first coal dryer in the first coal dryer is converted into a second coal dryer. Characterized by providing a coal drying apparatus using a reheat steam made to be put into secondary drying.
- the first steam chamber to the fourth steam chamber is connected to the steam supply pipe for supplying the reheat steam from the reheater, respectively, the first exhaust gas chamber to the fourth exhaust gas chamber is a gas discharge pipe for discharging the exhaust gas Each can be connected.
- the first steam chamber to the fourth steam chamber and the first exhaust gas chamber to the fourth exhaust gas chamber may be divided into a plurality.
- the first transfer plate is deflected and hinged to the first chain
- the second transfer plate is deflected and hinged to the second chain
- a plurality of the first transfer plate and the second transfer plate respectively
- the through hole is formed, each hole may be a porosity of 10 to 15% of the total area of the first transfer plate or the second transfer plate.
- a guide bar may be installed below the first driven sprocket and the second driven sprocket, respectively.
- first drive sprocket and the second drive sprocket may be connected so that the rotational power generated from the drive motor is transmitted through the reducer, respectively.
- the present invention removes moisture remaining inside and outside coal, which is a fuel used in a thermal power plant, by using high-temperature reheat steam in a multi-stage coal dryer to prevent incomplete combustion of coal, thereby improving coal calories and minimizing emissions of pollutants.
- To improve the corrosion protection and durability of the system to reduce spontaneous ignition rate due to water loss, to improve the grinding efficiency of coal mills and the heat distribution of power boilers during the combustion of coal, and to eliminate the blockage of moving passages during the transportation of coal. It is possible to improve the stability of coal supply by increasing the utilization of low-grade coal with low demand.
- low-calorie coal which is cheaper than high-calorie coal, to reduce fuel costs and costs by reducing coal imports, and to relatively reduce coal consumption, thereby reducing waste and pollutant emissions from combustion gases. It can enjoy the effect of reducing CO2 and CO2, and it can be expected to replace foreign technology and export of equipment.
- FIG. 1 is an embodiment according to the present invention, a block diagram showing a coal drying apparatus using reheat steam.
- FIG. 2 is a block diagram showing a coal drying apparatus using a reheat steam according to the present invention.
- FIG 3 is a side view showing a coal drying apparatus using the reheat steam of the present invention.
- FIGS. 4 and 5 are perspective views showing the main part of the driven sprocket of the coal drying apparatus using the reheat steam of the present invention.
- the low coal 10 is a place for storing and storing coal for use as a boiler fuel of the thermal power plant.
- Coal contains surface and internal moisture.
- the coal stored in the low coal 10 is sprayed periodically to prevent the scattering of coal powder.
- Coal stored in the low coal 10 is transferred to a coal drying apparatus through a conveying means such as a conveyor system.
- the coal of the low coal 10 in which moisture is not removed may be transferred to a drying coal supply tank 20 connected with a coal drying apparatus.
- coal stored in the coal supply tank 20 is to be supplied to the coal drying apparatus 100 in a predetermined amount in the coal metering device (30).
- the coal drying apparatus 100 includes two first coal dryers 110 and a second coal dryer 140 installed in a plurality of layers, and a third coal dryer for naturally drying coal discharged from the second coal dryer 140. 170 is included.
- the first coal dryer 110 and the second coal dryer 140 have the same structure.
- the first coal dryer 110 includes a pair of first driving sprockets 111 and a pair of first driven sprockets 112 spaced apart from the first driving sprocket by a predetermined distance.
- the first driving sprocket 111 and the first driven sprocket 112 are each configured with sprockets on both sides of a drum having a predetermined width. Therefore, the first driving sprocket 111 and the first driven sprocket 112 are positioned at a predetermined distance from side to side, and a pair of sprockets are respectively located before and after the first driving sprocket 111 and the first driven sprocket 112. It is composed.
- a pair of first chains 113 are fastened to transmit rotational force between the pair of first driving sprockets 111 and the pair of first driven sprockets 112.
- the rotational power generated from the first driving motor 118 is connected to the first driving sprocket 111 via the first reducer 119.
- a plurality of first transfer plates 114 are hinged between the first chains 113.
- the first transfer plate 114 is continuously arranged in a flat plate shape from side to side. Hinge is coupled between the first transfer plate 114 at a predetermined interval between the first chain 113, the hinge is positioned deflected to the first transfer plate 114, the hinge hole formed in the first chain 113 The hinges are combined.
- the first transfer plate 114 is formed with a through hole 114a penetrated up and down, and the through hole 114a is formed at a porosity of approximately 10 to 15% of the total area of the first transfer plate 114.
- the through-hole 114a is a hole through which reheat steam injected from the bottom passes.
- the combination of the first drive sprocket 111 and the first driven sprocket 112, the first chain 113 and the first transfer plate 114 serves as a conveyor for conveying coal.
- first guides for horizontally supporting the plurality of first transfer plates 114 under the upper first chain 113a positioned between the first driving sprocket 111 and the first driven sprocket 112, respectively.
- the rail 115 is installed.
- second guides horizontally supporting the plurality of first transfer plates 114 under the lower first chain 113b positioned between the first driving sprocket 111 and the first driven sprocket 112, respectively.
- Rail 116 is installed. The first guide rails 115 and the second guide rails 116 allow the first transfer plate 114 hinged to the first chain 113 to deflect and transport coal while being deflected.
- the first transfer plate 114 coupled to the upper first chain 113a while the first driven sprocket 112 fastened to the first chain 113 by the rotational force of the first driving sprocket 111 is rotated.
- Coal is transferred to the furnace, it is composed of two stages to transfer the coal to the first transfer plate 114 coupled to the lower first chain (113b).
- a first steam chamber 120 having a predetermined space is formed below the upper first chain 113a, and a second steam chamber 123 having a predetermined space is formed below the lower first chain 113b.
- the first steam chamber 120 and the second steam chamber 123 may be partitioned and installed in one or more.
- the first steam chamber 120 and the second steam chamber 123 are supplied with reheat steam supplied from the reheater 40 through the steam supply pipe 121.
- a first exhaust gas chamber 124 having a predetermined space is formed on the upper first chain 113a
- a second exhaust gas chamber 126 having a predetermined space is formed on the lower first chain 113b.
- the first exhaust gas chamber 124 and the second exhaust gas chamber 126 may be partitioned and installed in one or more.
- the first exhaust gas chamber 124 and the second exhaust gas chamber 126 are respectively discharged from the first steam chamber 120 and the second steam chamber 123 and after collecting the changed exhaust gas through the gas discharge pipe 125.
- the gas discharge pipe 125 may be provided with a blower for sucking the exhaust gas.
- the exhaust gas discharged through the gas discharge pipe 125 is introduced into the reheater 40 and the reheated steam reheated to a predetermined temperature passes through the steam supply pipe 121 and the first steam chamber 120 of the first coal dryer 110. And a second steam chamber 123.
- the second coal dryer 140 is installed at the bottom of the first coal dryer 110 to dry the coal first dried by the reheat steam in the first coal dryer 110, the second coal dryer ( 140 has a configuration substantially the same as that of the first coal dryer 110.
- the second coal dryer 140 is provided with a pair of second driving sprockets 141 and a pair of second driven sprockets 142 spaced apart from the second driving sprocket by a predetermined distance.
- the second driving sprocket 141 and the second driven sprocket 142 are each configured with sprockets on both sides of a drum having a predetermined width. Accordingly, the second driving sprocket 141 and the second driven sprocket 142 are positioned at a predetermined distance from side to side, and a pair of sprockets are respectively located before and after the second driving sprocket 141 and the second driven sprocket 142. It is composed.
- a pair of second chains 143 are fastened to transmit rotational force between the pair of second driving sprockets 141 and the pair of second driven sprockets 142.
- a plurality of second transfer plate 144 is hinged between the second chain 143.
- the second transfer plate 144 is continuously arranged in a flat plate shape from side to side.
- the second transfer plate 144 is hinged at a predetermined interval between the second chain 143, the hinge is positioned biased to the second transfer plate 144, the hinge hole formed in the second chain 143
- the hinges are combined.
- the second transfer plate 144 has a through hole 144a vertically penetrated, and the through hole 144a has a porosity of approximately 10 to 15% of the total area of the second transfer plate 144.
- the through hole 144a is a hole through which reheat steam injected from the lower part passes.
- a pair of the second driving sprocket 141 and the second driven sprocket 142, the second chain 143 and the second transfer plate 144 serves as a conveyor for transporting coal.
- a pair of third guides for horizontally supporting the plurality of second transfer plates 144 under the upper second chain 143a positioned between the second driving sprocket 141 and the second driven sprocket 142.
- the rail 145 is installed.
- a pair of fourth guides each horizontally supporting the plurality of second transfer plates 144 under the lower second chain 143b positioned between the second driving sprocket 141 and the second driven sprocket 142.
- the rail 146 is installed.
- the third guide rail 145 and the fourth guide rail 146 allow the second transfer plate 144 hinged to the second chain 143 to be deflected to transfer coal while being horizontally deflected.
- the second transfer plate 144 coupled to the upper second chain 143a while the second driven sprocket 142 fastened to the second chain 143 by the rotational force of the second driving sprocket 141 is rotated. It is composed of two stages to transfer coal to the furnace, and to transfer coal to the second transfer plate 144 coupled to the lower second chain (143b).
- a third steam chamber 150 having a predetermined space portion is formed below the upper second chain 143a, and a fourth steam chamber 153 having a predetermined space portion formed below the lower second chain 143b.
- the third and fourth steam chambers 150 and 153 may be partitioned and installed.
- the third steam chamber 150 and the fourth steam chamber 153 are supplied with reheat steam supplied from the reheater 40 through the steam supply pipe 121.
- a third exhaust gas chamber 154 having a predetermined space is formed on the upper second chain 143a
- a fourth exhaust gas chamber 156 having a predetermined space is formed on the lower second chain 143b.
- the third exhaust gas chamber 154 and the fourth exhaust gas chamber 156 may be partitioned and installed in one or more.
- the third exhaust gas chamber 154 and the fourth exhaust gas chamber 156 collect the changed exhaust gas after being injected from the third steam chamber 150 and the fourth steam chamber 153, respectively, and then the outside through the gas discharge pipe 125. To be discharged.
- the gas discharge pipe 125 may be provided with a blower for sucking the exhaust gas.
- the exhaust gas discharged through the gas discharge pipe 125 is input to the reheater 40 and the reheat steam reheated to a predetermined temperature is passed through the steam supply pipe 121 to the third steam chamber 150 of the second coal dryer 140. And a fourth steam chamber 153.
- the conveying speed of the chain and the second conveying plate of the first coal dryer 110 and the second coal dryer 140 is approximately 4m per minute, and the coal is transported to about 33 tons per hour.
- the third coal dryer 170 is installed under the second coal dryer 140 to dry naturally at room temperature while transporting the coal discharged by drying with reheat steam.
- the third coal dryer 170 is made of a flat belt conveyor or a U-shaped belt conveyor.
- Coal naturally dried while passing through the third coal dryer 170 is stored in the dry coal storage tank 50 and then supplied as a boiler fuel of a thermal power plant.
- the drying coal transferred to the drying coal supply tank 20 in the low coal storage 10 is introduced into the coal drying apparatus 100 from the coal quantity feeder 30.
- the drying coal introduced in a predetermined amount through the first inlet 130 of the first coal dryer 110 of the coal drying apparatus 100 is a pair of first driving sprockets 111 and a pair of first driven sprockets 112. ) Is loaded on the first transfer plate 114 coupled to the upper first chain 113a and transported.
- the high temperature reheat steam is supplied from the reheater 40 to the first steam chamber 120 installed under the upper first chain 113a through the first steam supply pipe 121, and the first steam chamber 120 is provided.
- the reheat steam supplied to is injected into the through-hole 114a formed in the first transfer plate 114.
- reheat steam is injected through the through hole 114a
- the coal being transported on the first transfer plate 114 is heated and dried.
- the reheat steam passing through the through-hole 114a of the first transfer plate 114 is collected in the first exhaust gas chamber 124 installed on the upper first chain 113a in the form of exhaust gas, and then opens the gas discharge pipe 125. Is discharged through.
- the gas discharge pipe 125 accelerates the discharge of the exhaust gas by a blower that sucks the exhaust gas.
- the exhaust gas discharged through the gas discharge pipe 125 is input to the reheater 40 and reheated to a predetermined temperature, and then the first steam chamber (1) of the first coal dryer 110 is passed through the steam supply pipe 121 in a reheat steam state. 120).
- first steam chamber 120 is continuously installed in one or more lower portions of the upper first chain 113a and undergoes several drying processes during the transfer of coal to the first transfer plate 114.
- the first transfer plate 114 deflected and hinged to the upper first chain 113a maintains a horizontal state while following the first guide rail 115, and the first guide rail 115 is disconnected.
- the first transfer plate 114 is vertical while rotating by its own weight by the deflected hinge coupling.
- the coal on the first transfer plate 114 is loaded onto the first transfer plate 114 hinged to the lower first chain 113b.
- first guide plate hinged to the first chain 113 conveyed to the first driven sprocket 112 maintains a vertical state, and the first guide is installed in an arc shape under the first driven sprocket 112. It is conveyed back to the horizontal state by the bar 117.
- the first transfer plate 114 transported by the first guide bar 117 having one side fixed on the second guide rail 116 becomes horizontal in a vertical state.
- coal falling from the first transfer plate 114 of the upper first chain 113a and loaded and transported onto the lower first chain 113b is continuously installed at least one lower portion of the lower first chain 113b. Heated by the reheat steam supplied to the steam chamber 123 is subjected to a continuous drying process. In addition, the exhaust gas collected after coal drying in the second exhaust gas chamber 126 installed on the lower first chain 113b is discharged through the gas discharge pipe 125.
- the first transfer plate 114 which is deflected and hinged to the lower first chain 113b, is kept horizontal while moving along the second guide rail 116, and is then at the point where the second guide rail 116 is disconnected. As early as possible, the first transfer plate 114 is vertically rotated by its own weight by the deflected hinge coupling. In this case, the coal on the first transfer plate 114 is introduced into the first inlet 130 of the second coal dryer 140 through the first outlet 131. In addition, the first transfer plate 114 hinged to the first chain 113 to be transferred to the first drive sprocket 111 is maintained in a vertical state and then moved along the rotation of the first drive sprocket 111 to be horizontal again. Becomes
- the coal is loaded and transported on the first transport plate 114 by the transport of the first chain 113 fastened between the first driving sprocket 111 and the first driven sprocket 112 of the first coal dryer 110.
- the silver is removed from the surface and the inside of the coal by continuous drying with a high temperature reheat steam in the upper first chain 113a and the lower first chain 113b, respectively.
- the second inlet 160 of the second coal dryer 140 installed under the first coal dryer 110 may be used. Is put into.
- the primary dried coal introduced through the second inlet 160 of the second coal dryer 140 of the coal drying apparatus 100 is a pair of second drive sprockets 141 and a pair of second driven sprockets 142. ) Is loaded on the second transfer plate 144 coupled to the upper second chain 143a and transported.
- the high temperature reheat steam is supplied from the reheater 40 to the third steam chamber 150 installed under the upper second chain 143a through the second steam supply pipe 151, and the third steam chamber 150 is provided.
- the reheat steam supplied to is injected into the through hole 144a formed in the second transfer plate 144.
- reheat steam is injected through the through hole 144a, the coal being transferred on the second transfer plate 144 is heated and dried.
- the reheat steam passing through the through hole 144a of the second transfer plate 144 is collected in the third exhaust gas chamber 154 installed on the upper second chain 143a in the form of exhaust gas, and then opens the gas discharge pipe 125. Is discharged through.
- the gas discharge pipe 125 accelerates the discharge of the exhaust gas by a blower that sucks the exhaust gas.
- the exhaust gas discharged through the gas discharge pipe 125 is input to the reheater 40 and reheated to a predetermined temperature, and then, through the steam supply pipe 121 in a reheat steam state, the third steam chamber (140) of the second coal dryer (140). 150).
- the third steam chamber 150 is continuously installed in one or more lower portions of the upper second chain (143a) to undergo several drying processes during the transfer of coal to the second transfer plate (144).
- the second transfer plate 144 that is deflected and hinged to the upper second chain 143a maintains a horizontal state while following the third guide rail 145 and reaches a point where the third guide rail 145 is disconnected.
- the second transfer plate 144 is vertically rotated by its own weight by the deflected hinge coupling. At this time, the coal on the second transfer plate 144 is loaded onto the second transfer plate 144 hinged to the lower second chain 143b.
- the second guide plate 144 hinged to the second chain 143 transferred to the second driven sprocket 142 maintains a vertical state, and the second guide is installed in an arc shape under the second driven sprocket 142.
- the bar 157 is transported back to the horizontal state. This is because the second transfer plate 144, which is transported by the second guide bar 157, one side of which is fixed on the fourth guide rail 146, becomes a horizontal state in a vertical state.
- coal falling from the second transfer plate 144 of the upper second chain 143a and loaded onto the lower second chain 143b and transported is continuously installed in at least one lower portion of the lower second chain 143b. Heated by the reheat steam supplied to the steam chamber 153 is subjected to a continuous drying process. The exhaust gas collected after coal drying in the fourth exhaust gas chamber 156 installed on the lower second chain 143b is discharged through the gas discharge pipe 125.
- the second transfer plate 144 that is deflected and hinged to the lower second chain 143b maintains a horizontal state while following the fourth guide rail 146, and then, at the point where the fourth guide rail 146 is disconnected. As soon as the second transfer plate 144 is rotated by its own weight by the deflected hinge coupling, it is in a vertical state. At this time, the coal on the second transfer plate 144 is discharged to the third coal dryer 170 through the second outlet 161.
- the second transfer plate 144 hinged to the second chain 143 transferred to the second drive sprocket 141 maintains a vertical state and then moves along the rotation of the second drive sprocket 141 to be horizontal again. Becomes
- the coal is loaded and transported on the second transfer plate 144 by the transfer of the second chain 143 fastened between the second driving sprocket 141 and the second driven sprocket 142 of the second coal dryer 140.
- the secondary second chain 143a and the lower second chain 143b respectively remove the moisture on the surface of the coal and the inside by successive drying with high temperature reheat steam.
- the second coal dryer 140 dries coal in the same drying process by the same configuration and structure as the first coal dryer 110. Therefore, the drying coal is first dried in the first coal dryer 110 and then secondly dried in the second coal dryer 140.
- Coal after the second drying process in the second coal dryer 140 is discharged through the second outlet 161 is discharged to the third coal dryer (170).
- the third coal dryer 170 naturally dries and cools the coal heated to a predetermined temperature at room temperature while transferring the coal introduced from the second coal dryer 140 to the belt conveyor.
- the coal transferred to the third coal dryer 170 is input to the dry coal storage tank 50 and then stored and then transferred to the thermal power plant 60.
- the temperature of the coal, which has been dried may be increased to about 90 to 110 ° C.
- the spontaneous ignition temperature of coal is about 93 ⁇ 95 °C, but the temperature of reheat steam is about 400 ⁇ 600 °C, so oxygen is scarce to ignite coal, so there is no risk of fire.
- the reheat steam generated by the reheater 40 is a transparent gas in which the condensation heat generated by the evaporative latent heat and the heating sensible heat, which are the heat of vaporization, and the radiant conductive heat are mixed.
- Reheat steam is produced by heating saturated steam generated in a boiler with a reheater.
- the steam produced in the boiler for power generation is at high pressure and high temperature, but the reheat steam produced in the reheater is low pressure and high temperature.
- Reheated steam is produced by heating the water at room temperature, so the residual oxygen in the water is several ppm, and if there is no air mixing, it can be heat-treated in an oxygen-free state.
- Reheat steam is about 10 times better than hot air, ie the heat treatment capacity of hot air.
- reheat steam is effective at depriving coal of latent heat.
- Coal drying apparatus using the reheat steam according to the present invention is to improve the heat of coal and minimize the emission of pollutants, to prevent corrosion and durability of the system, to reduce the spontaneous combustion rate due to water reduction, the grinding efficiency of coal grinding And improve the heat distribution of the power generation boiler during the combustion of coal, eliminate the blockage of the moving passage during the transfer of coal, and improve the stability of the coal supply by increasing the utilization of low-grade coal with low demand. There is this.
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Abstract
Description
Claims (6)
- 석탄을 건조하는 시스템에 있어서,한 쌍의 제1구동 스프로킷과 한 쌍의 제1종동 스프로킷이 일정 거리로 이격되어 각각 제1체인들로 체결되고, 제1체인들 사이에 복수의 제1이송플레이트가 힌지 결합되며, 제1구동 스프로킷과 제1종동 스프로킷 사이에 연결된 상측 제2체인 아래에 제1이송플레이트를 수평 지지하는 한 쌍의 제1가이드레일이 설치되고, 제1구동 스프로킷과 제1종동 스프로킷 사이에 연결된 하측 제1체인 아래에 제1이송플레이트를 수평 지지하는 한 쌍의 제2가이드레일이 설치되며, 상기 상측 제1체인 아래에 재열기에서 공급된 재열증기를 분사하는 제1증기챔버가 설치되고, 상기 하측 제1체인 아래에 재열기에서 공급된 재열증기를 분사하는 제2증기챔버가 설치되며, 상기 상측 제1체인 위에 배가스를 포집하는 제1배가스챔버가 설치되고, 상기 하측 제1체인 위에 배가스를 포집하는 제2배가스챔버가 설치된 제1석탄건조기;한 쌍의 제2구동 스프로킷과 한 쌍의 제2종동 스프로킷이 일정 거리로 이격되어 각각 제2체인들로 연결되고, 제2체인들 사이에 복수의 제2이송플레이트가 힌지 결합되며, 제2구동 스프로킷과 제2종동 스프로킷 사이에 연결된 상측 제2체인 아래에 제2이송플레이트를 수평 지지하는 한 쌍의 제3가이드레일이 설치되고, 제2구동 스프로킷과 제2종동 스프로킷 사이에 연결된 하측 제2체인 아래에 제2이송플레이트를 수평 지지하는 한 쌍의 제4가이드레일이 설치되며, 상기 상측 제2체인 아래에 재열기에서 공급된 재열증기를 분사하는 제3증기챔버가 설치되고, 상기 하측 제2체인 아래에 재열기에서 공급된 재열증기를 분사하는 제4증기챔버가 설치되며, 상기 상측 제2체인 위에 배가스를 포집하는 제3배가스챔버가 설치되고, 상기 하측 체인 위에 배가스를 포집하는 제4배가스챔버가 설치된 제2석탄건조기; 및상기 제2석탄건조기 아래에 설치되어 재열증기로 건조된 석탄을 이송하면서 상온에서 자연 건조시키는 제3석탄건조기;를 포함하고,상기 제1석탄건조기에서 1차 건조된 석탄을 제2석탄건조기로 투입시켜 2차 건조되도록 이루어진 재열증기를 이용한 석탄 건조 장치.
- 제 1항에 있어서,상기 제1증기챔버 내지 제4증기챔버에는 재열기로부터 재열증기를 공급하는 증기공급관이 각각 연결되고, 상기 제1배가스챔버 내지 제4배가스챔버에는 배가스를 배출하는 가스배출관이 각각 연결된 재열증기를 이용한 석탄 건조 장치.
- 제 1항에 있어서,상기 제1증기챔버 내지 제4증기챔버와 상기 제1배가스챔버 내지 제4배가스챔버는 복수로 구획된 재열증기를 이용한 석탄 건조 장치.
- 제 1항에 있어서,상기 제1이송플레이트는 제1체인에 편향되어 힌지 결합되고, 상기 제2이송플레이트는 제2체인에 편향되어 힌지 결합되며, 제1이송플레이트와 제2이송플레이트에 각각 복수의 통공이 형성되되, 각 통공은 제1이송플레이트 또는 제2이송플레이트의 전체 면적 대비 타공율이 10~15%인 재열증기를 이용한 석탄 건조 장치.
- 제 1항에 있어서,상기 제1종동 스프로킷과 제2종동 스프로킷 아래에 가이드 바가 각각 설치된 재열증기를 이용한 석탄 건조 장치.
- 제 1항에 있어서,상기 제1구동 스프로킷과 제2구동스프로킷은 각각 구동모터로부터 발생된 회전 동력이 감속기를 거쳐 전달되도록 연결된 재열증기를 이용한 석탄 건조 장치.
Priority Applications (6)
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CA2928103A CA2928103C (en) | 2013-10-30 | 2014-10-28 | Apparatus for drying coal using reheat steam |
RU2016120970A RU2626919C1 (ru) | 2013-10-30 | 2014-10-28 | Установка для сушки угля с использованием вторично перегретого пара |
US15/032,183 US20160264896A1 (en) | 2013-10-30 | 2014-10-28 | Apparatus for drying coal using reheat steam |
CN201480057843.3A CN105659044A (zh) | 2013-10-30 | 2014-10-28 | 利用再热蒸汽的煤炭干燥装置 |
AU2014340859A AU2014340859B2 (en) | 2013-10-30 | 2014-10-28 | Apparatus for drying coal using reheat steam |
PH12016500786A PH12016500786A1 (en) | 2013-10-30 | 2016-04-27 | Apparatus for drying coal using reheat steam |
Applications Claiming Priority (2)
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KR1020130129735A KR101408147B1 (ko) | 2013-10-30 | 2013-10-30 | 재열증기를 이용한 석탄 건조 장치 |
KR10-2013-0129735 | 2013-10-30 |
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WO2015064996A1 true WO2015064996A1 (ko) | 2015-05-07 |
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PCT/KR2014/010159 WO2015064996A1 (ko) | 2013-10-30 | 2014-10-28 | 재열증기를 이용한 석탄 건조 장치 |
Country Status (8)
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US (1) | US20160264896A1 (ko) |
KR (1) | KR101408147B1 (ko) |
CN (1) | CN105659044A (ko) |
AU (1) | AU2014340859B2 (ko) |
CA (1) | CA2928103C (ko) |
PH (1) | PH12016500786A1 (ko) |
RU (1) | RU2626919C1 (ko) |
WO (1) | WO2015064996A1 (ko) |
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RU2626919C1 (ru) | 2017-08-02 |
AU2014340859B2 (en) | 2016-11-24 |
PH12016500786A1 (en) | 2016-06-20 |
KR101408147B1 (ko) | 2014-06-17 |
CA2928103C (en) | 2017-09-19 |
CA2928103A1 (en) | 2015-05-07 |
CN105659044A (zh) | 2016-06-08 |
US20160264896A1 (en) | 2016-09-15 |
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