JP2000274945A

JP2000274945A - Slurry dryer

Info

Publication number: JP2000274945A
Application number: JP11075638A
Authority: JP
Inventors: Yasushi Osada; 泰長田; Nozomi Tamura; 望田村
Original assignee: Kawasaki Steel Corp
Current assignee: JFE Steel Corp
Priority date: 1999-03-19
Filing date: 1999-03-19
Publication date: 2000-10-06

Abstract

PROBLEM TO BE SOLVED: To suppress rotational unbalance during use by standing protrusions at a constant interval on a rotary disc along the circumferential fringe thereof. SOLUTION: This slurry dryer comprises one rotary disc 1. Protrusions 3 are stood at a constant interval on the surface of the rotary disc 1 along the circumferential fringe thereof just like conventional rolls. Unlike a conventional roll, the protrusion 3 is simply projecting upward like a cantilever and secured by a stopping means 9 directing from the lower surface side of the rotary disc 1 toward the upper surface side thereof. According to the structure, conventional trouble where a matter to be dried in slurry adheres partially to the rotary disc 1 to cause unbalance thereof is eliminated thoroughly. Since the stopping means 9 of the protrusion 3 is not exposed to the surface, no friction is generated from itself and the protrusion 3 does not fall off.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、スラリー乾燥装置
に係わり、詳しくは、該乾燥装置内へ供給する被乾燥材
であるスラリーを遠心噴霧して乾燥するスラリー乾燥装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry drying apparatus, and more particularly, to a slurry drying apparatus for centrifugally spraying a slurry as a material to be supplied to the drying apparatus and drying the slurry.

【０００２】[0002]

【従来の技術】例えば、液体（水、水溶液等）に固体状
の被乾燥物質が懸濁したスラリーから液体のみを蒸発除
去し、被乾燥物質を乾燥するために、図４に示すような
乾燥装置１３が用いられることがある。この乾燥装置１
３は、頂部より前記スラリー１４を噴霧状態で供給し、
下方から上昇してくる熱風１５と接触させることで加熱
し、液体を蒸発除去すると共に、乾燥品１６を下方から
回収するものである。この装置では、乾燥効率の観点か
ら、スラリー１４ができるだけ微細に分散して噴霧され
ることが望ましい。そのため、従来から、特開平９−１
３１５５０号公報で開示されたような噴霧装置６が一般
に用いられている。2. Description of the Related Art For example, in order to dry a substance to be dried by evaporating and removing only the liquid from a slurry in which a solid substance to be dried is suspended in a liquid (water, aqueous solution, etc.), the drying as shown in FIG. The device 13 may be used. This drying device 1
3 supplies the slurry 14 in a spray state from the top,
The heating is performed by contacting the hot air 15 rising from below to evaporate and remove the liquid and collect the dried product 16 from below. In this apparatus, it is desirable that the slurry 14 be dispersed and sprayed as finely as possible from the viewpoint of drying efficiency. Therefore, conventionally, Japanese Patent Laid-Open No. 9-1
A spraying device 6 as disclosed in Japanese Patent Publication No. 31550 is generally used.

【０００３】その噴霧装置は、図２に示すように噴霧装
置６の下方に回転円盤１を設置し、該噴霧装置６の上方
に設置したモータ１１により増速機１２を介してシャフ
ト５を高速回転させることでシャフト５に徒弟された回
転円盤１を高速回転させるとともに、この回転円盤１の
内部へスラリー１４をスラリーの供給管１０から供給す
るものである。In the spraying device, as shown in FIG. 2, the rotating disk 1 is installed below the spraying device 6, and the shaft 5 is driven at a high speed via a speed increasing device 12 by a motor 11 installed above the spraying device 6. By rotating the rotating disk 1, the rotating disk 1 discriminated by the shaft 5 is rotated at a high speed, and the slurry 14 is supplied from the slurry supply pipe 10 into the rotating disk 1.

【０００４】この回転円盤１は図３に示すように、上下
に適当な距離だけ離隔し、平行に配置された下方の回転
円盤２ａと上方の回転円盤２ｂの間に、円の周縁部に沿
って同心円状にコロ４と呼ばれる部材を複数個配置した
構造を有している。As shown in FIG. 3, the rotating disk 1 is vertically spaced apart by an appropriate distance, and is disposed between a lower rotating disk 2a and an upper rotating disk 2b disposed in parallel along the periphery of the circle. It has a structure in which a plurality of members called rollers 4 are arranged concentrically.

【０００５】スラリー１４は、図２のスラリー供給管１
０を経由して上方の回転円盤２ｂとシャフト５の隙間か
ら、回転円盤１の下方の回転円盤２ａと上方の回転円盤
２ｂとの間へ供給される。そこで、回転円盤１が２００
０〜１００００ｒｐｍといった高速回転することにより
該回転円盤１の周縁から外側へスラリーが流出する。そ
の時、前記コロ４に、スラリーが流出する流れが断続的
に遮断されるために、スラリーは微細な液滴となって周
囲へ飛散する。The slurry 14 is supplied to the slurry supply pipe 1 shown in FIG.
Through a gap 0 between the upper rotating disk 2b and the shaft 5, the air is supplied between the lower rotating disk 2a of the rotating disk 1 and the upper rotating disk 2b. Therefore, the rotating disk 1 is 200
By rotating at a high speed of 0 to 10000 rpm, the slurry flows out from the periphery of the rotating disk 1 to the outside. At this time, since the flow of the slurry flowing out to the rollers 4 is intermittently interrupted, the slurry is scattered as fine droplets around.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、かかる
遠心式噴霧装置に用いる回転円盤１では、使用時にスラ
リー１４による摩耗等に起因して前記コロ４の一本が破
損した場合、上方の回転円盤２ｂを支持する力のバラン
スが崩れ、他のコロ４も負荷がかかって破損し、その結
果、上方の回転円盤２ｂがシャフト５の周囲で空転し
て、シャフト５を含めた噴霧装置６をも破損するという
問題が生じていた。However, in the rotating disk 1 used in such a centrifugal spraying device, when one of the rollers 4 is damaged due to abrasion by the slurry 14 during use, the upper rotating disk 2b is used. The balance of the force supporting the shaft is lost, and the other rollers 4 are also damaged by the load. As a result, the upper rotating disk 2b spins around the shaft 5 and the spray device 6 including the shaft 5 is also damaged. Problem had arisen.

【０００７】また、固着性の高い物質を含むスラリー１
４を噴霧する場合、図３の固着物７に示すように上方の
回転円盤２ｂに該物質が固着し、固着物７により、噴霧
装置６のバランスが崩れたり、あるいは、固着物７が回
転中に剥れて、コロ４に引っかかり、回転円盤１のバラ
ンスが崩れて、シャフト５へ大きな負荷を与え、シャフ
ト５が破損することもあった。Further, a slurry 1 containing a substance having a high sticking property is used.
When the spray 4 is sprayed, the substance is fixed to the upper rotating disk 2b as shown in the fixed matter 7 in FIG. 3, and the balance of the spraying device 6 is lost due to the fixed matter 7, or the fixed matter 7 is rotating. In some cases, the rotating disk 1 was unbalanced, a large load was applied to the shaft 5, and the shaft 5 was sometimes damaged.

【０００８】本発明は、かかる事情に鑑み、使用時に回
転円盤のバランスが崩れることを抑制したスラリー乾燥
装置を提供することを目的としている。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slurry drying apparatus in which the balance of a rotating disk during use is suppressed.

【０００９】[0009]

【課題を解決するための手段】発明者は、上記目的を達
成するため、従来の回転円盤の欠点を是正することに鋭
意努力し、その成果を本発明に具現化した。Means for Solving the Problems In order to achieve the above object, the inventor made an intensive effort to correct the drawbacks of the conventional rotating disk, and embodied the results in the present invention.

【００１０】すなわち、本発明は、供給するスラリーを
回転円盤の遠心力で分散させる噴霧手段を備えたスラリ
ー乾燥装置において、前記回転円盤に、その周縁に沿
い、隣り同士互いに等間隔で、上方に突き出した突起が
立設されたことを特徴とするスラリー乾燥装置である。That is, the present invention provides a slurry drying apparatus provided with a spraying means for dispersing a slurry to be supplied by centrifugal force of a rotating disk. A slurry drying apparatus characterized in that protruding projections are provided upright.

【００１１】前記突起は、回転円盤の下面側から上面側
に向けた係止手段で固定されることが好ましい。It is preferable that the projection is fixed by locking means directed from the lower surface to the upper surface of the rotating disk.

【００１２】本発明によれば、回転円盤を一枚にしたの
で、従来のコロに相当する突起の摩耗があっても、上方
の回転円盤の空転や固着物によるバランス崩れが生じに
くい。また、該突起の回転円盤への固定を、該円盤の下
面側から上方へ向けた係止手段で行うようにしたので、
係止手段が露出せず、突起が少々摩耗しても、使用中に
突起が回転円盤から外れる機会が減少する。さらに、噴
霧装置本体の破損も生じないようになる。従って、回転
円盤の寿命が延長し、スラリーの乾燥装置への適切な供
給が安定して行えるようになる。加えて、回転円盤の軽
量化が達成できるため、製作コストが低減すると共に、
回転動力の低減もできるため、モータ等の運転動力費用
の削減も可能になった。According to the present invention, since the rotating disk is one, even if there is abrasion of a projection corresponding to a conventional roller, the upper rotating disk is less likely to spin or lose balance due to a fixed substance. Further, since the fixing of the projections to the rotating disk is performed by locking means facing upward from the lower surface side of the disk,
Even if the locking means is not exposed and the projection is slightly worn, the chance of the projection coming off the rotating disk during use is reduced. Further, damage to the spraying device main body does not occur. Therefore, the life of the rotating disk is extended, and appropriate supply of the slurry to the drying device can be stably performed. In addition, since the weight of the rotating disk can be reduced, the manufacturing cost can be reduced,
Since the rotational power can be reduced, the cost of operating power for a motor and the like can be reduced.

【００１３】[0013]

【発明の実施の形態】以下、図面を参照して、本発明の
実施の形態を説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１４】まず、本発明に係るスラリー乾燥装置の大
部分は、例えば、前記図４に示した構成である。つま
り、被乾燥物のスラリー１４を収容し、それらを加熱す
る炉の働きをする乾燥装置１３の本体と、該本体の中へ
加熱用の熱風１５を送る熱源供給管１９と、炉内から排
ガス１７を抜く排気口と、被乾燥物質であるスラリーを
該本ら本体に供給する噴霧手段と、乾燥品１６を排出す
る排出手段（ロータリーバルブ１８）とで形成してあ
る。First, most of the slurry drying apparatus according to the present invention has, for example, the structure shown in FIG. That is, the main body of the drying device 13 that contains the slurry 14 of the material to be dried and functions as a furnace for heating them, the heat source supply pipe 19 that sends the hot air 15 for heating into the main body, and the exhaust gas from the furnace. An exhaust port for extracting the substance 17, a spray means for supplying the slurry to be dried to the main body, and a discharge means (rotary valve 18) for discharging the dried product 16 are formed.

【００１５】そして、本発明の特徴部は、前記噴霧手段
６の構造を改良したことにあり、具体的には、図１に示
すように、一枚の回転円盤１を用いるものである。この
円盤１の表面には、従来のコロ４と同様に、周縁に沿
い、隣り同士互いに等間隔で、突起３が立設されてい
る。ただし、従来のコロ４と異なり、単に片持梁状に上
方に突き出した構造になっている。しかも、該突起3
は、回転円盤１の下面側から上面側に向けた係止手段９
（例えば、ビス、ボルト等）で固定している。なお、本
発明では、この突起３は、軸を中心に回転しても良い。
スラリーの分散に大きな影響がないからである。A feature of the present invention is that the structure of the spraying means 6 has been improved. Specifically, as shown in FIG. 1, one rotating disk 1 is used. On the surface of the disk 1, protrusions 3 are provided upright along the periphery and at equal intervals from each other, similarly to the conventional roller 4. However, unlike the conventional roller 4, it has a structure simply protruding upward in a cantilever shape. Moreover, the projection 3
Are locking means 9 from the lower surface side of the rotating disk 1 to the upper surface side.
(For example, screws, bolts, etc.). In the present invention, the projection 3 may rotate around an axis.
This is because there is no significant effect on the dispersion of the slurry.

【００１６】本発明により、従来のように、スラリー中
の被乾燥物の一部が回転円盤１に固着し、回転円盤１の
バランスが崩れることが皆無になった。また、突起３の
係止手段９は、係止部が表面に露出していないので、そ
れ自体の摩耗は、生じない。そのため、係止手段９の破
損で突起３が抜け落ちることがない。さらに、本発明で
は、突起３の材質を高温下で耐摩耗性に優れたセラミッ
ク（例えば，窒化珪素、炭化珪素）にすることで、突起
自体の損耗も低減することができる。According to the present invention, a part of the material to be dried in the slurry is fixed to the rotating disk 1 as in the prior art, and the balance of the rotating disk 1 is not lost. In addition, since the locking portion of the locking means 9 of the projection 3 is not exposed to the surface, the wear itself does not occur. Therefore, the projection 3 does not fall out due to the damage of the locking means 9. Furthermore, in the present invention, the protrusion 3 itself can be reduced in wear by using a ceramic (for example, silicon nitride or silicon carbide) having excellent wear resistance at high temperatures.

【００１７】[0017]

【実施例】図１に示した形状の回転円盤１を備えたスラ
リー乾燥装置１３を用いて、製鋼工場で発生した転炉ス
ラグと水とからなるスラリー１４の乾燥を行った。ま
た、本発明の効果を確認するため、図３に示した従来の
回転円盤１を使用した乾燥も行った。なお、図１の回転
円盤１は、ＳＵＳ３０４製で，サイズが直径２００ｍ
ｍ，厚み４０ｍｍであり、突起３は、窒化珪素製で、直
径２０ｍｍ、高さ４０ｍｍである。EXAMPLE A slurry 14 consisting of converter slag and water generated in a steelmaking factory was dried using a slurry drying apparatus 13 provided with a rotating disk 1 having the shape shown in FIG. Further, in order to confirm the effect of the present invention, drying using the conventional rotating disk 1 shown in FIG. 3 was also performed. 1 is made of SUS304 and has a diameter of 200 m.
m, the thickness is 40 mm, and the projections 3 are made of silicon nitride, and have a diameter of 20 mm and a height of 40 mm.

【００１８】操業条件は、以下の通りである。The operating conditions are as follows.

【００１９】スラリーの処理速度：８０ｋｇ／時間（ドライ状態基準）転炉スラグの濃度：５３ｗｔ％処理時間： …２４時間円盤の回転速度：１００００ｒｐｍ乾燥温度：入口４５０℃ 出口１８０℃ 乾燥品の水分：０．３ｗｔ％（乾燥炉内で）操業結果は、従来の回転円盤１，２では、24時間後に上
方の円盤に固着物７が１〜２ｍｍの厚みで不均一に付着
していた。また、経時的に騒音が大きくなり、振動計２
１でもかなりの振動が確認された。この状態で操業を継
続すると、数時間のうちに、回転バランスが悪化して、
コロ４の抜け出し、あるいは回転円盤１，２の破損にな
ると判断し、３日間で操業を中止した。Processing speed of slurry: 80 kg / hour (based on dry state) Concentration of converter slag: 53 wt% Processing time: ... 24 hours Rotation speed of disk: 10,000 rpm Drying temperature: Inlet 450 ° C Outlet 180 ° C Moisture of dried product: 0.3 wt% (in a drying furnace) The operation results showed that, in the case of the conventional rotating disks 1 and 2, after 24 hours, the adhered matter 7 was unevenly attached to the upper disk with a thickness of 1 to 2 mm. In addition, the noise increases with time, and the vibration meter 2
Even at 1, considerable vibration was confirmed. If operation is continued in this state, the rotational balance will deteriorate within a few hours,
The operation was stopped in three days, judging that the roller 4 came off or the rotating disks 1 and 2 were damaged.

【００２０】一方、本発明に係る回転円盤１では、２４
時間使用後の観察でもスラグの付着、突起３の損傷がな
く、その後継続して１ヶ月の運転を行ったが一切の問題
が生じなかった。On the other hand, in the rotating disk 1 according to the present invention, 24
There was no adhesion of the slag and no damage of the projections 3 even after the use for a long time, and the operation was continued for one month thereafter, but no problem occurred.

【００２１】[0021]

【発明の効果】以上述べたように、本発明により、回転
円盤への固着物の付着がなくなり、回転バランスの崩れ
を妨げるようになる。その結果、噴霧装置本体の寿命
が、従来より格段と延長できるようになった。また、回
転円盤が軽量化され、回転動力の低減、設備費用の削減
も達成できる。As described above, according to the present invention, the adhered matter does not adhere to the rotating disk and the rotation balance is prevented from being lost. As a result, the life of the spraying device main body can be remarkably extended as compared with the related art. Further, the weight of the rotating disk is reduced, so that the rotating power and the equipment cost can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係るスラリー乾燥装置で採用した回転
円盤を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a rotating disk employed in a slurry drying apparatus according to the present invention.

【図２】噴霧装置の全体図である。FIG. 2 is an overall view of a spray device.

【図３】従来の回転円盤を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a conventional rotating disk.

【図４】スラリー乾燥装置の全体を示す概略図である。FIG. 4 is a schematic view showing the entire slurry drying apparatus.

【符号の説明】[Explanation of symbols]

１回転円盤２ａ下方の回転円盤２ｂ上方の回転円盤３突起４コロ５シャフト６噴霧装置（噴霧手段）７固着物９取付ボルト１０スラリー供給管１１モータ１２増速機１３乾燥装置１４スラリー１５熱風１６乾燥品１７排ガス１８ロータリーバルブ１９熱風供給管 Reference Signs List 1 rotating disk 2a lower rotating disk 2b upper rotating disk 3 projection 4 roller 5 shaft 6 spraying device (spraying means) 7 fixed object 9 mounting bolt 10 slurry supply pipe 11 motor 12 speed increasing device 13 drying device 14 slurry 15 hot air 16 Dried product 17 Exhaust gas 18 Rotary valve 19 Hot air supply pipe

フロントページの続きＦターム(参考） 3L113 AA07 AB03 AC01 AC45 AC46 AC48 AC49 AC52 AC54 AC56 AC63 AC67 AC90 BA36 DA02 DA05 DA06 DA14 DA18 4F033 PB15 4G012 JJ02 Continued on the front page F term (reference) 3L113 AA07 AB03 AC01 AC45 AC46 AC48 AC49 AC52 AC54 AC56 AC63 AC67 AC90 BA36 DA02 DA05 DA06 DA14 DA18 4F033 PB15 4G012 JJ02

Claims

【特許請求の範囲】[Claims]

【請求項１】供給するスラリーを回転円盤の遠心力で
分散させる噴霧手段を備えたスラリー乾燥装置におい
て、前記回転円盤に、その周縁に沿い、隣り同士互いに等間
隔で、上方に突き出した突起が立設されたことを特徴と
するスラリー乾燥装置。1. A slurry drying apparatus provided with a spraying means for dispersing a slurry to be supplied by centrifugal force of a rotating disk, wherein said rotating disk has projections protruding upward at equal intervals along the periphery and adjacent to each other. A slurry drying device, which is erected.