JP2006232891A - Method and apparatus for drying wet raw material - Google Patents

Method and apparatus for drying wet raw material Download PDF

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JP2006232891A
JP2006232891A JP2005045977A JP2005045977A JP2006232891A JP 2006232891 A JP2006232891 A JP 2006232891A JP 2005045977 A JP2005045977 A JP 2005045977A JP 2005045977 A JP2005045977 A JP 2005045977A JP 2006232891 A JP2006232891 A JP 2006232891A
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gas
raw material
fluidized bed
wet raw
charging chute
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JP4681319B2 (en
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Unai Kaneko
宇内 金子
Atsushi Fujikawa
淳 藤川
Kazutsugu Kishigami
和嗣 岸上
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Nippon Steel Corp
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Nippon Steel Corp
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Priority to BRPI0606866-9A priority patent/BRPI0606866A2/en
Priority to PCT/JP2006/302858 priority patent/WO2006090649A1/en
Priority to UAA200710499A priority patent/UA86872C2/en
Priority to KR1020077021713A priority patent/KR100960429B1/en
Priority to RU2007135214/15A priority patent/RU2366686C2/en
Priority to CN200680005761.XA priority patent/CN101128568B/en
Priority to TW95105753A priority patent/TWI279512B/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • 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
    • F26B3/08—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 so as to loosen them, e.g. to form a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F23K1/04—Heating fuel prior to delivery to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)
  • Coke Industry (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent that wet raw material attaches or deposits to charge chute of a fluidized bed drying machine at a low cost and by simple constitution, in a method and an apparatus for drying the wet raw material by the fluid bed drying machine. <P>SOLUTION: The method for drying the wet raw material comprises blowing a part of a high-temperature gas into the interior of a charge chute 6 for charging the wet raw material into the fluid bed drying machine 4, when drying the wet raw material such as coal charged into a coke oven by introducing a high temperature gas into the fluid bed layer drying machine 4 as a gas combinedly used as a heat source and a fluidized gas. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、コークス炉に装入する石炭等の湿潤原料を流動層乾燥機によって乾燥する方法及び装置に関する。   The present invention relates to a method and apparatus for drying a wet raw material such as coal charged in a coke oven with a fluidized bed dryer.

コークス生産に際し、コークスの品質向上及びコークス炉での生産性向上を目的として、コークス炉装入前に装入石炭を乾燥することが行われている。コークス炉用石炭の含有水分は乾燥前で通常９〜１３％程度であるが、この石炭を石炭乾燥機で水分５〜６％に乾燥する。   In coke production, for the purpose of improving the quality of coke and improving the productivity in the coke oven, the charging coal is dried before charging the coke oven. The water content of the coke oven coal is usually about 9 to 13% before drying, but this coal is dried to 5 to 6% with a coal dryer.

この石炭の乾燥に流動層乾燥機を用いることは従来より知られており、特許文献１には、コークス炉の煙道排ガスを熱源兼流動化気体として流動層乾燥機に導入して石炭を乾燥する方法が開示されている。   It has been known to use a fluidized bed dryer for drying coal. Patent Document 1 introduces coke oven flue flue gas as a heat source and fluidized gas into a fluidized bed dryer to dry the coal. A method is disclosed.

また、特許文献２には、排ガスを熱源兼流動化気体として流動層乾燥機に導入して湿潤原料を乾燥するにあたって、流動層乾燥機のガス出口近傍及びその下流側で結露が発生するのを防止するために、流動層乾燥機下部に導入される排ガスの一部を流動層乾燥機のガス出口近傍に導入する方法が開示されている。   Further, in Patent Document 2, when exhaust gas is introduced into a fluidized bed dryer as a heat source and fluidized gas to dry a wet raw material, condensation occurs near the gas outlet of the fluidized bed dryer and downstream thereof. In order to prevent this, a method is disclosed in which a part of the exhaust gas introduced into the lower part of the fluidized bed dryer is introduced in the vicinity of the gas outlet of the fluidized bed dryer.

しかし、これらの流動層乾燥機による湿潤原料の乾燥方法では、装入シュートによって湿潤原料を流動層乾燥機へ装入するようにしていることから、装入シュートの内部、とくに側端部（角部）において湿潤原料の付着・堆積が起こり、装入不具合の原因となっていた。とくに、雨天時等、湿潤原料の含水率が高い場合には、装入シュートへの付着・堆積は顕著である。さらに、寒冷地において気温が大幅に低下した場合は、装入シュートに付着・堆積した湿潤原料が凍結し、装入不具合を悪化させていた。   However, in these methods for drying wet raw materials using a fluidized bed dryer, the wet raw material is charged into the fluidized bed dryer by means of a charging chute. Part)), wet material adheres and accumulates, causing charging problems. In particular, when the moisture content of the wet raw material is high, such as in rainy weather, the adhesion / deposition to the charging chute is remarkable. Furthermore, when the temperature dropped significantly in a cold region, the wet raw material adhering to and deposited on the charging chute was frozen, and the charging failure was exacerbated.

これに対して、蒸気等の熱媒体による間接加熱により装入シュートを加熱し、湿潤原料の付着・堆積を防止する方法があるが、この方法では、高価な加熱用の装置が必要であると同時に、蒸気等の熱媒体のランニングコストが必要であった。他の方法として、装入シュートの外部から人力もしくは圧縮空気振動によってハンマリングを行うことが考えられるが、重筋作業もしくは圧縮空気のランニングコストが必要である。
特開２００１−５５５８２号公報 特許第２８０７８１３号公報 On the other hand, there is a method of heating the charging chute by indirect heating with a heat medium such as steam to prevent adhesion / deposition of wet raw materials, but this method requires an expensive heating device. At the same time, the running cost of a heat medium such as steam was required. As another method, it is conceivable to perform hammering from the outside of the charging chute by human power or compressed air vibration, but it requires heavy muscle work or running cost of compressed air.
JP 2001-55582 A Japanese Patent No. 2807813

本発明が解決しようとする課題は、湿潤原料を流動層乾燥機によって乾燥する方法及び装置において、湿潤原料が流動層乾燥機の装入シュートに付着・堆積することを、低コストかつ簡単な構成で防止できるようにすることにある。   The problem to be solved by the present invention is to provide a method and apparatus for drying a wet raw material with a fluidized bed dryer, so that the wet raw material adheres and accumulates on the charging chute of the fluidized bed dryer at a low cost and with a simple configuration. It is to be able to prevent.

本発明の湿潤原料の乾燥方法は、高温ガスを熱源兼流動化気体として流動層乾燥機に導入してコークス炉に装入する石炭等の湿潤原料を乾燥させる湿潤原料の乾燥方法において、流動層乾燥機へ湿潤原料を装入する装入シュートの内部に、前記高温ガスの一部を吹き込むことを特徴とする。   The wet raw material drying method of the present invention is a fluidized bed drying method for drying a wet raw material such as coal that is introduced into a fluidized bed dryer as a heat source and fluidizing gas and charged in a coke oven. A part of the high-temperature gas is blown into a charging chute for charging the wet raw material into the dryer.

また、本発明の湿潤原料の乾燥装置は、高温ガスを熱源兼流動化気体として流動層乾燥機に導入してコークス炉に装入する石炭等の湿潤原料を乾燥させる湿潤原料の乾燥装置において、流動層乾燥機へ湿潤原料を装入する装入シュートの内部に向けて前記高温ガスの一部を吹き込む吹込みノズルを設けたことを特徴とする。   Further, the wet raw material drying apparatus of the present invention is a wet raw material drying apparatus for drying a wet raw material such as coal introduced into a coke oven by introducing a high-temperature gas as a heat source and fluidizing gas into a fluidized bed dryer. A blowing nozzle for blowing a part of the high-temperature gas toward the inside of the charging chute for charging the wet raw material into the fluidized bed dryer is provided.

本発明の乾燥方法及び装置において、高温ガスの一部は、装入シュート内部の側端部に向けて吹き込むようにすることができる。   In the drying method and apparatus of the present invention, a part of the hot gas can be blown toward the side end portion inside the charging chute.

また、高温ガスの一部は、装入シュートの上流側から装入シュートの内部に向けて吹き込むようにすることもできる。   Also, a part of the high temperature gas can be blown from the upstream side of the charging chute toward the inside of the charging chute.

さらに、高温ガスの一部を、装入シュートの内部に吹き込むと共に流動層乾燥機のガス出口近傍にも導入し、流動層乾燥機のガス出口近傍でのガス温度が露点以上となるように、装入シュート内部への高温ガス吹込み量と流動層乾燥機のガス出口近傍への高温ガス導入量を制御することもできる。   Furthermore, a part of the high temperature gas is blown into the inside of the charging chute and also introduced near the gas outlet of the fluidized bed dryer, so that the gas temperature near the gas outlet of the fluidized bed dryer is equal to or higher than the dew point. The amount of hot gas blown into the charging chute and the amount of hot gas introduced near the gas outlet of the fluidized bed dryer can be controlled.

本発明では、流動層乾燥機の熱源兼流動化気体として使用する高温ガスの一部を装入シュートの内部に吹き込むので、従来、湿潤原料の付着・堆積防止のために設置していた蒸気等の熱媒体による間接加熱方式の加熱装置等が不要である。したがって、装置の構成が簡単となり、コストも低減できる。   In the present invention, since a part of the high temperature gas used as a heat source and fluidizing gas of the fluidized bed dryer is blown into the charging chute, steam or the like that has conventionally been installed to prevent the adhesion and accumulation of wet raw materials No indirect heating type heating device or the like is required. Therefore, the configuration of the apparatus becomes simple and the cost can be reduced.

また、本発明は、高温ガスの一部を装入シュートの内部に吹き込む直接加熱方式であるので、従来の間接加熱方式に比べ、装入シュート内部への湿潤原料の付着・堆積を確実に防止することができる。また、寒冷地における湿潤原料の凍結も防止することができる。   In addition, since the present invention is a direct heating method in which a part of the high-temperature gas is blown into the charging chute, it reliably prevents wet raw materials from adhering and accumulating inside the charging chute compared to the conventional indirect heating method. can do. Moreover, freezing of the wet raw material in a cold district can also be prevented.

加えて、従来、結露防止のため流動層乾燥機上部のガス出口近傍に高温ガスを導入していたガス配管の径を縮小、もしくは、そのガス配管を削除することが可能となる。   In addition, it is possible to reduce the diameter of a gas pipe that has conventionally introduced a high-temperature gas in the vicinity of the gas outlet at the top of the fluidized bed dryer to prevent condensation, or to delete the gas pipe.

以下、本発明をコークス炉用石炭粉（以下単に「石炭粉」という。）の乾燥に適用した実施例に基づき、本発明の実施の形態を説明する。   Hereinafter, embodiments of the present invention will be described based on examples in which the present invention is applied to drying of coal powder for coke ovens (hereinafter simply referred to as “coal powder”).

図１は、本発明の乾燥装置の第１実施例を示す概略構成図である。   FIG. 1 is a schematic configuration diagram showing a first embodiment of the drying apparatus of the present invention.

同図において、コークス炉（図示せず）で発生した温度１５０〜２５０℃程度の燃焼排ガス（以下「高温ガス」という。）は、押込ファン１によって昇圧され、ガス本管２及び流量調節弁３を介して流動層乾燥機４の下部から導入され、上部のガス出口５から排出される。   In the figure, combustion exhaust gas (hereinafter referred to as “hot gas”) having a temperature of about 150 to 250 ° C. generated in a coke oven (not shown) is boosted by a pushing fan 1, and a gas main pipe 2 and a flow control valve 3. Is introduced from the lower part of the fluidized bed dryer 4 and discharged from the upper gas outlet 5.

湿潤原料である石炭粉は、装入シュート６によって流動層乾燥機４内に装入され、流動層乾燥機４下部より導入した上述の高温ガスによる上昇流によって流動層７を形成する。この流動層７において石炭粉の乾燥を行い、石炭粉は所定の温度及び含水率に調整されて排出シュート８によって排出される。   Coal powder, which is a wet raw material, is charged into the fluidized bed dryer 4 by the charging chute 6 and forms the fluidized bed 7 by the upward flow of the high-temperature gas introduced from the lower part of the fluidized bed dryer 4. The coal powder is dried in the fluidized bed 7, and the coal powder is adjusted to a predetermined temperature and moisture content and is discharged by the discharge chute 8.

ガス本管２からは第１バイパス管９が分岐しており、この第１バイパス管９を介して高温ガスの一部が流動層乾燥機４上部のガス出口５近傍に導入される。さらに、第１バイパス管９からは、その途中に設けた流量調節弁１０の下流側より第２バイパス管１１が分岐しており、この第２バイパス管１１を介して高温ガスの一部が装入シュート６の内部に吹き込まれる。第１バイパス管９から導入される高温ガスのうち、第２バイパス管１１に分配されるガス量の調整方法として、第２バイパス管１１の途中に流量調節弁やオリフィスを設ける方法や、第１バイパス管９の第２バイパス管１１との分岐部よりも下流側において流量調節弁やオリフィスを設ける方法、さらにはその両方が考えられる。   A first bypass pipe 9 branches from the gas main pipe 2, and a part of the high-temperature gas is introduced into the vicinity of the gas outlet 5 at the upper part of the fluidized bed dryer 4 through the first bypass pipe 9. Further, the second bypass pipe 11 branches from the first bypass pipe 9 from the downstream side of the flow rate control valve 10 provided in the middle, and a part of the high temperature gas is loaded through the second bypass pipe 11. It is blown into the entrance chute 6. Among the high-temperature gas introduced from the first bypass pipe 9, as a method for adjusting the amount of gas distributed to the second bypass pipe 11, a method of providing a flow control valve or an orifice in the middle of the second bypass pipe 11, A method of providing a flow control valve and an orifice on the downstream side of the branch portion of the bypass pipe 9 with the second bypass pipe 11 and both of them can be considered.

流動層乾燥機４上部のガス出口５から排出されたガスは、誘引ファン１４で誘引されてガス排出管１２を流れ、バグフィルター等の集塵機１３で除塵された後、大気中に排出される。   The gas discharged from the gas outlet 5 at the top of the fluidized bed dryer 4 is attracted by the attracting fan 14 and flows through the gas discharge pipe 12, and is removed by the dust collector 13 such as a bag filter and then discharged into the atmosphere.

以上のように、本発明では高温ガスの一部を装入シュート６の内部に吹き込むことで、装入シュート６内部への石炭粉の付着・堆積を防止することができる。   As described above, in the present invention, a part of the high-temperature gas is blown into the charging chute 6 so that the coal powder can be prevented from adhering and accumulating inside the charging chute 6.

また、装入シュート６の内部に吹き込む高温ガスとガス出口５近傍に導入する高温ガスは、非乾燥物を含む流動層７を通過しないので高温のままであり、これらの高温ガス量を制御することで、ガス出口５近傍でのガス温度を露点以上とすることができ、ガス出口５近傍及びその下流側での結露の発生を防止することができる。本実施例では、上述のとおり、第２バイパス管１１を第１バイパス管９の流量調節弁１０の下流側で分岐しているので、流量調節弁１０によって流動層７を通過しない高温ガス総量を調節し、ガス出口５近傍でのガス温度が露点以上になるようにする。また、第２バイパス管１１を第１バイパス管９の流量調節弁１０の下流側で分岐することで、装入シュート６までの第２バイパス管１１の配管長を短くすることができる。   Further, the high temperature gas blown into the charging chute 6 and the high temperature gas introduced in the vicinity of the gas outlet 5 do not pass through the fluidized bed 7 containing non-dried material, and thus remain at a high temperature, and the amount of these high temperature gases is controlled. As a result, the gas temperature in the vicinity of the gas outlet 5 can be made higher than the dew point, and the occurrence of condensation in the vicinity of the gas outlet 5 and on the downstream side thereof can be prevented. In the present embodiment, as described above, since the second bypass pipe 11 is branched downstream of the flow rate control valve 10 of the first bypass pipe 9, the total amount of high-temperature gas that does not pass through the fluidized bed 7 by the flow rate control valve 10 is determined. The gas temperature in the vicinity of the gas outlet 5 is adjusted to be higher than the dew point. Further, by branching the second bypass pipe 11 on the downstream side of the flow rate control valve 10 of the first bypass pipe 9, the pipe length of the second bypass pipe 11 up to the charging chute 6 can be shortened.

なお、高温ガスの温度が不足する場合は、ガス本管２の第１バイパス管９の分岐箇所より上流側に加熱装置を設けてガスを加熱するようにしても良い。   When the temperature of the high temperature gas is insufficient, a heating device may be provided upstream of the branch location of the first bypass pipe 9 of the gas main pipe 2 to heat the gas.

図２は高温ガスを装入シュートの内部に吹き込む構成例を示し、（ａ）は正面図、（ｂ）は（ａ）のＡ−Ａ矢視図である。図３（ａ），（ｂ）は、それぞれ、図２の構成において高温ガスを装入シュートの内部に吹き込む吹込みノズルの配置例を示す。   FIG. 2 shows a configuration example in which high temperature gas is blown into the charging chute, where (a) is a front view and (b) is an AA arrow view of (a). 3 (a) and 3 (b) show examples of arrangement of blowing nozzles for blowing high temperature gas into the charging chute in the configuration shown in FIG.

図２に示す例は、高温ガスを、石炭粉が付着しやすい装入シュート６内部の側端部（角部）に向けて吹き込むようにしたものである。具体的には、図３に示すように装入シュート６の摺動面６ａ及び側面６ｂに複数の吹込みノズル１５を設け、吹込みノズル１５の吹き出し方向が装入シュート６の側端部６ｃに向くようにする。このとき、図３に示す角度θ１、θ２を適宜調整することで、装入シュート６の側端部６ｃへの石炭粉の付着を確実に防止することができる。また、吹込みノズル１５の位置は、図３に示すＬ１、Ｌ２を可能な限り小さくすることが好ましい。さらに、装入シュート６の摺動面６ａに配置する吹込みノズル１５は、装入シュート６を落下する石炭粉がノズル口を塞がないように角度をつける必要があり、図３において９０°−（θｃ＋θｎ）が石炭粉の安息角より大きくなるように吹込みノズル１５の角度を設定することが好ましい。   In the example shown in FIG. 2, high-temperature gas is blown toward the side end (corner) inside the charging chute 6 where coal powder easily adheres. Specifically, as shown in FIG. 3, a plurality of blowing nozzles 15 are provided on the sliding surface 6 a and side surface 6 b of the charging chute 6, and the blowing direction of the blowing nozzle 15 is the side end 6 c of the charging chute 6. Try to face. At this time, adhesion of coal powder to the side end portion 6c of the charging chute 6 can be reliably prevented by appropriately adjusting the angles θ1 and θ2 shown in FIG. The position of the blowing nozzle 15 is preferably as small as possible in L1 and L2 shown in FIG. Further, the blowing nozzle 15 disposed on the sliding surface 6a of the charging chute 6 needs to be angled so that the coal powder falling on the charging chute 6 does not block the nozzle opening. It is preferable to set the angle of the blowing nozzle 15 so that − (θc + θn) is larger than the angle of repose of the coal powder.

なお、装入シュート６への石炭粉の付着を防止するために加熱・乾燥させることを考えると、装入シュート６に吹き込む高温ガスの温度は、大気温度より高いことが好ましい。また、一般的に普通鋼板で製作される装入シュート６の耐熱性を考えると、吹き込む高温ガスの温度は３５０℃以下であることが好ましい。吹き込む高温ガスの湿度は、低ければ低いほど好ましい。   In consideration of heating and drying in order to prevent coal powder from adhering to the charging chute 6, the temperature of the high-temperature gas blown into the charging chute 6 is preferably higher than the atmospheric temperature. Considering the heat resistance of the charging chute 6 that is generally made of a normal steel plate, the temperature of the hot gas blown is preferably 350 ° C. or lower. The lower the humidity of the hot gas blown, the better.

図４は、高温ガスを装入シュートの内部に吹き込む他の構成例を示し、（ａ）は正面図、（ｂ）は（ａ）のＢ−Ｂ矢視図である。図５は、図４の構成において高温ガスを装入シュートの内部に吹き込む吹込みノズルの配置例を示す。   4A and 4B show another configuration example in which high-temperature gas is blown into the charging chute, where FIG. 4A is a front view and FIG. 4B is a view taken along the line B-B in FIG. FIG. 5 shows an arrangement example of blowing nozzles for blowing hot gas into the charging chute in the configuration of FIG.

図４に示す例は、高温ガスを、装入シュート６の上流側の装入装置１６から装入シュート６の内部に向けて吹き込み、装入シュート６全体を加熱・乾燥させるようにしたものである。具体的には図５に示すように、装入装置１６に吹込みノズル１５を配置し、装入シュート６の内部に高温ガスを吹き込む。このとき、装入装置１６から装入シュート６を通って流動層内へ装入される石炭粉が円滑に落下できるように、図５において吹込みノズル１５の角度θｐは０°〜θｃの間とすることが好ましい。また、吹込みノズル１５の流動層と反対側の下端面Ｎの位置は、装入シュート６の摺動面６ａの上端面Ｃの位置より、装入シュート６の内方（流動層側）に位置するようにすることが好ましい。   In the example shown in FIG. 4, high temperature gas is blown from the charging device 16 upstream of the charging chute 6 toward the inside of the charging chute 6 to heat and dry the entire charging chute 6. is there. Specifically, as shown in FIG. 5, the blowing nozzle 15 is disposed in the charging device 16, and high temperature gas is blown into the charging chute 6. At this time, the angle θp of the blowing nozzle 15 in FIG. 5 is between 0 ° and θc so that the coal powder charged into the fluidized bed through the charging chute 6 from the charging device 16 can fall smoothly. It is preferable that Further, the position of the lower end surface N on the side opposite to the fluidized bed of the blowing nozzle 15 is inward of the charging chute 6 (fluidized bed side) from the position of the upper end surface C of the sliding surface 6a of the charging chute 6. It is preferable to be located.

図６は、本発明の乾燥装置の第２実施例を示す概略構成図である。なお、図１に示した第１実施例と同一の構成には同一の符号を付し、その説明を省略する。   FIG. 6 is a schematic block diagram showing a second embodiment of the drying apparatus of the present invention. In addition, the same code | symbol is attached | subjected to the structure same as 1st Example shown in FIG. 1, and the description is abbreviate | omitted.

図１に示した第１実施例では、高温ガスの一部を装入シュート６へ吹き込むための第２バイパス管１１を第１バイパス管９から分岐したが、本実施例では、第２バイパス管１１をガス本管２から分岐し、第２バイパス管１１にも流量調節弁１７を設けている。   In the first embodiment shown in FIG. 1, the second bypass pipe 11 for blowing a part of the high temperature gas into the charging chute 6 is branched from the first bypass pipe 9, but in this embodiment, the second bypass pipe 11 is branched from the gas main pipe 2, and the flow rate adjusting valve 17 is also provided in the second bypass pipe 11.

本実施例では、第２バイパス管１１をガス本管２につなぎ込むのみで、押込ファン１によって昇圧された高温ガスを装入シュート６の内部に吹き込むことができる。   In the present embodiment, the high-temperature gas boosted by the pushing fan 1 can be blown into the charging chute 6 simply by connecting the second bypass pipe 11 to the gas main pipe 2.

また、本実施例では、第１バイパス管９の流量調節弁１０と第２バイパス管１１の流量調節弁１７に制御装置１８を接続し、第１バイパス管９及び第２バイパス管１１の高温ガス流量を検出して調節できるようにしている。これによって、流動層７を通過しない高温ガス総量を調節し、ガス出口５近傍でのガス温度が露点以上なるようにする。また、このように、第２バイパス管１１からも高温ガスを導入することにより、従来、１本のガス配管（第１バイパス管９）でガス出口５近傍に高温ガスを導入していた場合に比べ、そのガス配管の径を縮小、もしくは、そのガス配管を削除することが可能となる。   In this embodiment, a control device 18 is connected to the flow rate control valve 10 of the first bypass pipe 9 and the flow rate control valve 17 of the second bypass pipe 11, and the hot gas in the first bypass pipe 9 and the second bypass pipe 11 is connected. The flow rate is detected and adjusted. As a result, the total amount of high-temperature gas that does not pass through the fluidized bed 7 is adjusted so that the gas temperature in the vicinity of the gas outlet 5 is equal to or higher than the dew point. In addition, by introducing the high temperature gas also from the second bypass pipe 11 as described above, conventionally, when the high temperature gas has been introduced in the vicinity of the gas outlet 5 by one gas pipe (first bypass pipe 9). In comparison, the diameter of the gas pipe can be reduced or the gas pipe can be deleted.

図７は、本発明の乾燥装置の第３実施例を示す概略構成図である。なお、図１に示した第１実施例と同一の構成には同一の符号を付し、その説明を省略する。   FIG. 7 is a schematic configuration diagram showing a third embodiment of the drying apparatus of the present invention. In addition, the same code | symbol is attached | subjected to the structure same as 1st Example shown in FIG. 1, and the description is abbreviate | omitted.

本実施例では、高温ガスに加えて、もしくは高温ガスに代えて、計装空気等の乾燥ガスを装入シュート６に吹き込むようにした。だたし、計装空気を使用する場合、温度が低いことと計装空気のランニングコストを考慮すると、効率的とはいえない。また、酸素分を多く含むガスを吹き込むことは、流動層乾燥機４内の酸素濃度を高めることになるので、吹込みの際は、粉塵爆発防止等を考え、流動層乾燥機４内の酸素濃度が安全な範囲となるように吹込み量を調節する必要がある。   In this embodiment, dry gas such as instrument air is blown into the charging chute 6 in addition to the high temperature gas or instead of the high temperature gas. However, when using instrument air, it is not efficient considering the low temperature and the running cost of instrument air. In addition, blowing in a gas containing a large amount of oxygen increases the oxygen concentration in the fluidized bed dryer 4, so when blowing, oxygen in the fluidized bed dryer 4 is taken into consideration in order to prevent dust explosion. It is necessary to adjust the blowing amount so that the concentration falls within a safe range.

本発明は、コークス炉に装入する石炭粉の乾燥のみならず、水砕スラグや石灰石など、他の湿潤原料の乾燥にも適用できる。また、使用する高温ガスもコークス炉の燃焼排ガスに限らず、燃焼炉やキルンなどからの排ガスを使用することもできる。   The present invention can be applied not only to drying coal powder charged into a coke oven, but also to drying other wet raw materials such as granulated slag and limestone. Moreover, the high temperature gas to be used is not limited to the combustion exhaust gas of the coke oven, but exhaust gas from a combustion furnace or kiln can also be used.

本発明の乾燥装置の第１実施例を示す概略構成図である。It is a schematic block diagram which shows 1st Example of the drying apparatus of this invention. 高温ガスを装入シュートの内部に吹き込む構成例を示し、（ａ）は正面図、（ｂ）は（ａ）のＡ−Ａ矢視図である。The structural example which blows high temperature gas in the inside of a charging chute is shown, (a) is a front view, (b) is an AA arrow line view of (a). 図２の構成において高温ガスを装入シュートの内部に吹き込む吹込みノズルの配置例を示す。The example of arrangement | positioning of the blowing nozzle which blows high temperature gas in the inside of a charging chute in the structure of FIG. 2 is shown. 高温ガスを装入シュートの内部に吹き込む他の構成例を示し、（ａ）は正面図、（ｂ）は（ａ）のＢ−Ｂ矢視図である。The other structural example which blows high temperature gas into the inside of a charging chute is shown, (a) is a front view, (b) is a BB arrow line view of (a). 図４の構成において高温ガスを装入シュートの内部に吹き込む吹込みノズルの配置例を示す。The example of arrangement | positioning of the blowing nozzle which blows high temperature gas in the inside of a charging chute in the structure of FIG. 4 is shown. 本発明の乾燥装置の第２実施例を示す概略構成図である。It is a schematic block diagram which shows 2nd Example of the drying apparatus of this invention. 本発明の乾燥装置の第３実施例を示す概略構成図である。It is a schematic block diagram which shows 3rd Example of the drying apparatus of this invention.

符号の説明Explanation of symbols

１ 押込ファン
２ ガス本管
３ 流量調節弁
４ 流動層乾燥機
５ ガス出口
６ 装入シュート
６ａ 装入シュートの摺動面
６ｂ 装入シュートの側面
６ｃ 装入シュートの側端部
７ 流動層
８ 排出シュート
９ 第１バイパス管
１０ 流量調節弁１０
１１ 第２バイパス管
１２ ガス排出管
１３ 集塵機
１４ 誘引ファン
１５ 吹込みノズル
１６ 装入装置
１７ 流量調節弁
１８ 制御装置 DESCRIPTION OF SYMBOLS 1 Push fan 2 Gas main pipe 3 Flow control valve 4 Fluidized bed dryer 5 Gas outlet 6 Charging chute 6a Sliding surface of charging chute 6b Side surface of charging chute 6c Side edge part of charging chute 7 Fluidized bed 8 Discharge Chute 9 First bypass pipe 10 Flow control valve 10
DESCRIPTION OF SYMBOLS 11 2nd bypass pipe 12 Gas exhaust pipe 13 Dust collector 14 Induction fan 15 Blowing nozzle 16 Charging device 17 Flow control valve 18 Control apparatus

Claims (8)

高温ガスを熱源兼流動化気体として流動層乾燥機に導入してコークス炉に装入する石炭等の湿潤原料を乾燥させる湿潤原料の乾燥方法において、流動層乾燥機へ湿潤原料を装入する装入シュートの内部に、前記高温ガスの一部を吹き込むことを特徴とする湿潤原料の乾燥方法。   In a method for drying a wet material such as coal, which is introduced into a fluidized bed dryer as a heat source and fluidized gas and charged into a coke oven, the wet material is charged into the fluidized bed dryer. A method for drying a wet raw material, wherein a portion of the high-temperature gas is blown into an inlet chute. 前記高温ガスの一部を、装入シュート内部の側端部に向けて吹き込む請求項１に記載の湿潤原料の乾燥方法。   The wet raw material drying method according to claim 1, wherein a part of the high-temperature gas is blown toward a side end portion inside the charging chute. 前記高温ガスの一部を、装入シュートの上流側から装入シュートの内部に向けて吹き込む請求項１に記載の湿潤原料の乾燥方法。   The method for drying a wet raw material according to claim 1, wherein a part of the high-temperature gas is blown from the upstream side of the charging chute toward the inside of the charging chute. 前記高温ガスの一部を、装入シュートの内部に吹き込むと共に流動層乾燥機のガス出口近傍にも導入し、流動層乾燥機のガス出口近傍でのガス温度が露点以上となるように、装入シュート内部への高温ガス吹込み量と流動層乾燥機のガス出口近傍への高温ガス導入量を制御する請求項１〜３のいずれかに記載の湿潤原料の乾燥方法。   A part of the high-temperature gas is blown into the charging chute and also introduced in the vicinity of the gas outlet of the fluidized bed dryer, so that the gas temperature in the vicinity of the gas outlet of the fluidized bed dryer is equal to or higher than the dew point. The method for drying a wet raw material according to any one of claims 1 to 3, wherein the amount of hot gas blown into the inlet chute and the amount of hot gas introduced near the gas outlet of the fluidized bed dryer are controlled. 高温ガスを熱源兼流動化気体として流動層乾燥機に導入してコークス炉に装入する石炭等の湿潤原料を乾燥させる湿潤原料の乾燥装置において、流動層乾燥機へ湿潤原料を装入する装入シュートの内部に向けて前記高温ガスの一部を吹き込む吹込みノズルを設けたことを特徴とする湿潤原料の乾燥装置。   In a wet raw material drying device that dries a wet raw material such as coal that is introduced into a fluidized bed dryer as a heat source and fluidized gas and charged into a coke oven, the wet raw material is charged into the fluidized bed dryer. An apparatus for drying a wet raw material, comprising a blowing nozzle for blowing a part of the high-temperature gas toward the inside of the inlet chute. 吹込みノズルの吹出し方向が装入シュート内部の側端部に向くように吹込みノズルを配置した請求項５に記載の湿潤原料の乾燥装置。   The wet raw material drying apparatus according to claim 5, wherein the blowing nozzle is arranged so that a blowing direction of the blowing nozzle faces a side end portion inside the charging chute. 吹込みノズルを装入シュートの上流側に配置し、吹込みノズルの吹出し方向が装入シュートの内部を向くようにした請求項５に記載の湿潤原料の乾燥装置。   6. The wet raw material drying apparatus according to claim 5, wherein the blowing nozzle is disposed upstream of the charging chute so that the blowing direction of the blowing nozzle faces the inside of the charging chute. 前記高温ガスの一部を流動層乾燥機のガス出口近傍に導入するガス配管を設け、さらに、流動層乾燥機のガス出口近傍でのガス温度が露点以上となるように、装入シュート内部への高温ガス吹込み量と流動層乾燥機のガス出口近傍への高温ガス導入量を制御する制御装置を設けた請求項５〜７のいずれかに記載の湿潤原料の乾燥装置。   A gas pipe for introducing a part of the high-temperature gas into the vicinity of the gas outlet of the fluidized bed dryer is provided, and further inside the charging chute so that the gas temperature in the vicinity of the gas outlet of the fluidized bed dryer is equal to or higher than the dew point. The wet raw material drying apparatus according to any one of claims 5 to 7, further comprising a control device for controlling a high-temperature gas blowing amount and a high-temperature gas introduction amount near the gas outlet of the fluidized bed dryer.
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UAA200710499A UA86872C2 (en) 2005-02-22 2006-02-17 Method and apparatus for drying of wet raw material
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BRPI0606866-9A BRPI0606866A2 (en) 2005-02-22 2006-02-17 wet raw material drying method and apparatus
RU2007135214/15A RU2366686C2 (en) 2005-02-22 2006-02-17 Method and aggregate of raw humid material drying
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CN102311745A (en) * 2011-04-02 2012-01-11 中冶焦耐(大连)工程技术有限公司 Whole-boiling vibration push-type coal humidifying device
WO2013021470A1 (en) * 2011-08-09 2013-02-14 三菱重工業株式会社 Fluidized-bed drying device and fluidized-bed drying facility
KR101599678B1 (en) * 2015-11-05 2016-03-03 비디아이 주식회사 Coal drying system
JP2020139715A (en) * 2019-03-01 2020-09-03 日本製鉄株式会社 Fluidized dryer
JP7260751B2 (en) 2019-03-01 2023-04-19 日本製鉄株式会社 Fluidized dryer

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WO2006090649A1 (en) 2006-08-31
CN101128568A (en) 2008-02-20
UA86872C2 (en) 2009-05-25
KR20070107141A (en) 2007-11-06
BRPI0606866A2 (en) 2009-07-28
TW200630578A (en) 2006-09-01
JP4681319B2 (en) 2011-05-11
CN101128568B (en) 2015-09-09

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