JP2922802B2 - Filtration device - Google Patents
Filtration deviceInfo
- Publication number
- JP2922802B2 JP2922802B2 JP6305049A JP30504994A JP2922802B2 JP 2922802 B2 JP2922802 B2 JP 2922802B2 JP 6305049 A JP6305049 A JP 6305049A JP 30504994 A JP30504994 A JP 30504994A JP 2922802 B2 JP2922802 B2 JP 2922802B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- stirring blade
- rotating shaft
- filter
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Filtration Of Liquid (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は濾過装置に関し、特に、
原料スラリーを濾過→ケーキ洗浄→乾燥または原料スラ
リーを濾過して、原料スラリー中の固体粒子を乾燥粉末
状態または湿潤ケーキ状態で取り出すための濾過装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter, and more particularly, to a filter.
The present invention relates to a filtration device for filtering a raw material slurry → cake washing → drying or filtering the raw material slurry to take out solid particles in the raw material slurry in a dry powder state or a wet cake state.
【0002】[0002]
【従来の技術および発明が解決しようとする課題】この
種の装置としては、ヌッチェ型の濾過乾燥装置が広く知
られており、同装置は、単一の装置にて、且つ密閉系に
て、濾過、洗浄、乾燥等の多くの機能を果たし得て、毒
性物質、引火性物質、悪臭物質等の取扱を安全に行うこ
とができ、しかも、その機構が比較的簡単である等の特
長を有するので、食品工業、医薬品工業、化学工業等の
分野において広く使用されている。2. Description of the Related Art As this type of apparatus, a Nutsche-type filtration and drying apparatus is widely known, which is a single apparatus and a closed system. It can perform many functions such as filtration, washing, and drying, and can safely handle toxic substances, flammable substances, odorous substances, etc., and has the features that its mechanism is relatively simple. Therefore, it is widely used in the fields of food industry, pharmaceutical industry, chemical industry and the like.
【0003】これら濾過乾燥装置には、通常、槽本体の
側壁に粉体製品を乾燥させるための伝熱面が設けられる
と共に、その乾燥を促進させるために濾過ケーキを撹拌
する機能と、乾燥後の粉体製品を、その下部に設けられ
た排出口へ掻き寄せて排出する機能とを併せもたせた撹
拌翼が設置されている。[0003] In these filtration and drying apparatuses, a heat transfer surface for drying the powder product is usually provided on the side wall of the tank body, and a function of stirring the filter cake to promote the drying is provided. A stirring blade is also provided which has the function of scraping and discharging the powder product to a discharge port provided below the powder product.
【0004】また、これら濾過乾燥装置は、乾燥後の粉
体製品を回収するための排出口を、槽本体の下部に配さ
れた濾材・濾板および下蓋の中央部または周辺部を貫通
させて設けたものと、濾材の直上方に位置する槽本体の
下部側壁に設けたものとに大別される。Further, in these filtration and drying apparatuses, a discharge port for collecting the dried powder product is made to penetrate through a central portion or a peripheral portion of a filter medium / filter plate and a lower cover disposed at a lower portion of a tank body. And a filter provided on the lower side wall of the tank body located immediately above the filter medium.
【0005】この後者の従来の濾過乾燥装置では、槽本
体中心に回転軸を縦設すると共に、この回転軸下端部
に、掻取刃翼を設けた複数の翼アームを有してなる回転
翼を取り付け、この回転翼によって濾過ケーキを掻取・
撹拌すると共に、ほぐした粉粒体を伝熱面である槽本体
側壁に向かう外周方向に送って乾燥を促進させ、乾燥後
の粉体製品を、槽本体側壁に設けた排出口から排出させ
て回収する構成が採られている。この濾過乾燥装置にお
ける回転翼の形状は様々であるが、その回転方向の力を
掻取刃翼の傾斜角によって法線方向の分力として、ほぐ
した粉粒体を槽本体側壁に向かう外周方向に送る方法が
通常である。In the latter conventional filtration / drying apparatus, a rotary shaft is provided vertically at the center of the tank body, and a plurality of blade arms provided with a scraping blade at the lower end of the rotary shaft. And the filter blade scrapes the filter cake.
While stirring, the loosened powder is sent in the outer circumferential direction toward the tank body side wall which is a heat transfer surface to promote drying, and the dried powder product is discharged from the discharge port provided in the tank body side wall. A configuration for collecting is adopted. The shape of the rotary blade in this filtration and drying apparatus is various, but the force in the rotational direction is made into a component force in the normal direction by the inclination angle of the scraping blade, and the loosened powder is directed in the outer circumferential direction toward the tank body side wall. The method of sending to is usually.
【0006】例えば、実開平5−67304号公報に
は、乾燥工程において槽本体側壁がなす伝熱面での粉体
製品の更新を円滑なものとし、その乾燥効率を向上させ
ることができ、乾燥後における粉体製品を容易に排出し
うる構造のものとして、図5に示すように、「ベル型ハ
ウジング状に形成し、上部にスラリー供給口1を有する
とともに下部側壁に粉体排出口2を有し且つ側壁外周に
加熱ジャケット3を有する槽本体4と、濾液排出口5を
有し濾布6および多孔質濾過板7を重層支持して本体の
下部に設けた下蓋8と、槽本体4内の中央部の上下方向
に配した回転軸9と、この回転軸9の下端部に取り付け
られ、濾過ケーキを掻取・撹拌して外周方向に送る複数
の板状の掻取刃翼10aを下方に向けて突設した一対の
翼アーム10、10´と、粉体を内周方向に送りだす1
枚の板状の掻戻刃翼11aを下方に向けて最外周部に突
設した翼アーム11、11´を有してなる回転翼12と
を備えた濾過乾燥装置」記載されている。For example, Japanese Utility Model Laid-Open No. 5-67304 discloses that in the drying step, the powder product can be smoothly renewed on the heat transfer surface formed by the side wall of the tank body, and the drying efficiency can be improved. As shown in FIG. 5, a powder product having a structure capable of easily discharging the powder product later can be formed into a bell-shaped housing, having a slurry supply port 1 at an upper portion and a powder discharge port 2 at a lower side wall. A tank body 4 having a heating jacket 3 on the outer periphery of a side wall, a lower lid 8 having a filtrate discharge port 5 and provided at a lower portion of the body with a filter cloth 6 and a porous filter plate 7 supported in layers. And a plurality of plate-shaped scraping blades 10a attached to the lower end of the rotating shaft 9 and arranged to scrape and agitate the filter cake and send the filtered cake in the outer circumferential direction. A pair of wing arms 10, 10 projecting downward When, 1 for feeding the powder to the inner circumferential direction
A filter / drying device having a wing arm 11, 11 'having blade-shaped arms 11, 11' protruding from the outermost peripheral portion thereof with a plate-shaped recovery blade 11a facing downward.
【0007】しかし、図5に示す従来の濾過乾燥装置
は、翼形状が複雑なため、翼を洗浄しにくく、翼への付
着物等が除去しにくい。また、翼幅が大きいので、ケー
キ掻取時に過大なトルクが発生し、大きな動力が必要と
なる。さらに、形状が複雑なので、製缶・溶接・機械加
工等の工数が多く、製造コストが高くなる。However, the conventional filtration and drying apparatus shown in FIG. 5 has a complicated wing shape, so that it is difficult to clean the wings and to remove deposits and the like on the wings. Further, since the blade width is large, an excessive torque is generated at the time of cake scraping, and a large power is required. Furthermore, since the shape is complicated, man-hours for can manufacturing, welding, machining, etc. are large, and the manufacturing cost is high.
【0008】本発明は従来の技術の有するこのような問
題点に鑑みてなされたものであって、その目的は、洗浄
が容易な形状で、全工程を通じて大きなトルクが発生せ
ず、しかも製造コストの低い濾過装置を提供することに
ある。The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object a shape that is easy to clean, does not generate a large torque throughout the entire process, and has a low manufacturing cost. To provide a low filtration device.
【0009】[0009]
【課題を解決するための手段】上記目的を達成するため
に本発明の要旨は、ベル型ハウジング状に形成され、ス
ラリー供給口を有する槽本体と、濾液排出口を有し且つ
濾材および濾板を重層支持して本体下部に設けた下蓋
と、槽本体の中心に縦設した回転軸と、該回転軸の下端
部に取り付けられて濾過ケーキを掻き取り・撹拌する複
数の翼アームを有してなる撹拌翼とを備え、且つ粉体排
出口を設けた濾過装置において、上記撹拌翼の翼アーム
は円筒形状の管体を該管体軸方向に沿って斜めに切断し
た形状であって、円弧状の両端面の中で円弧長の短い方
を先端側とし、円弧長の長い方を回転軸に固着したこと
を特徴とする濾過装置にある。SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a tank body formed in a bell-shaped housing and having a slurry supply port, a filtrate outlet and a filter medium and a filter plate. A lower shaft provided at the lower portion of the main body in a layered manner, a rotating shaft vertically provided at the center of the tank main body, and a plurality of blade arms attached to the lower end of the rotating shaft for scraping and stirring the filter cake. And a blade arm of the stirring blade, wherein the blade arm of the stirring blade has a shape obtained by cutting a cylindrical tube obliquely along the axial direction of the tube. And a filter device characterized in that a shorter one of the arc-shaped end surfaces is fixed to a tip end and a longer one is fixed to a rotating shaft.
【0010】[0010]
【作用】撹拌翼は円筒形状の管体を該管体軸方向に沿っ
て斜めに切断しただけの単純な形状の翼アームからなる
ので、翼が洗浄しやすく、翼への付着物等が除去しやす
い。また、翼アームの形状が簡単であるから、特別な加
工を必要とせず、製造コストが低くなる。さらに、翼ア
ームが丸みを有し且つ先端部の翼面積が固定側に比して
小さいので、撹拌翼によるケーキの掻取・撹拌時にも大
きなトルクが発生しない。[Function] The agitating blade consists of a wing arm having a simple shape obtained by simply cutting a cylindrical tube obliquely along the axial direction of the tube, so that the blade is easy to clean and removes deposits on the blade. It's easy to do. Further, since the shape of the wing arm is simple, no special processing is required and the manufacturing cost is reduced. Further, since the blade arm is round and the blade area at the tip is smaller than that on the fixed side, a large torque is not generated even when the stirring blade scrapes and stirs the cake.
【0011】[0011]
【実施例】以下に本発明の実施例を説明する。図1は、
本発明の濾過装置の縦断面図であり、図5に示す濾過乾
燥装置との違いは、回転翼12を本発明の撹拌翼13に
代えた点と先端部にノズル14aを設けた洗浄液配管1
4を槽本体内上部に配設した点が異なり、他の部分は同
じなので、同一参照番号を付与して説明を省略する。1
5は導管、16は点検ハッチ、17は粉体排出口2へ粉
体を排出する開閉蓋、18aは回転軸9を回転動するた
めの駆動装置、18bは回転軸9を上下動するための駆
動装置である。本実施例では駆動装置18bとして油圧
シリンダーを使用した。なお、図1に示す実施例では、
粉体排出口2を槽本体4の下部側壁に設けているが、下
蓋8に粉体排出口を設けることもできる。Embodiments of the present invention will be described below. FIG.
FIG. 6 is a longitudinal sectional view of the filtration device of the present invention, which is different from the filtration and drying device shown in FIG. 5 in that the rotating blades 12 are replaced with the stirring blades 13 of the present invention and the cleaning liquid pipe 1 provided with a nozzle 14a at the tip.
4 is arranged in the upper part in the tank main body, and the other parts are the same. Therefore, the same reference numerals are given and the description is omitted. 1
5 is a conduit, 16 is an inspection hatch, 17 is an opening / closing lid for discharging powder to the powder discharge port 2, 18 a is a driving device for rotating the rotating shaft 9, and 18 b is a driving device for moving the rotating shaft 9 up and down. It is a driving device. In this embodiment, a hydraulic cylinder is used as the driving device 18b. In the embodiment shown in FIG.
Although the powder outlet 2 is provided on the lower side wall of the tank body 4, the lower cover 8 may be provided with a powder outlet.
【0012】図2は撹拌翼の詳細を示す図であり、図2
(a)は、回転軸9に撹拌翼13を装着した状態を示す
平面図、図2(b)は図2(a)の正面図、図2(c)
は回転軸9に取り付けた側の撹拌翼13の翼アーム13
´の端面を示す図である。図2(a)に示すように、撹
拌翼13は3枚の先細の翼アーム13´から構成されて
いる。個々の翼アーム13´は円筒形状の管体を軸方向
に沿って斜めに切断した形状のものであり、両端面の円
弧の長さは異なっている。本実施例では、図2(c)に
示すように、円弧長が長い方である回転軸側端面13a
の円弧の中心角が80°となるように円弧長を設定し、
撹拌翼13の翼アーム13´の下端は、水平面と30°
の角をなすように鋭角に加工されており、ケーキ掻き取
りに有利な構造をしている。また、翼アーム13´のも
う一方の端面13bの円弧長は、図2(a)、(b)に
示すように、回転軸側端面13aより短くなっている。
翼アーム13´は、湾曲面が上になっており、かつ、先
細、すなわち先端部の翼面積が固定側に比べて小さいの
で、撹拌翼によるケーキの掻き取り時にも大きな回転ト
ルクが発生せず、駆動エネルギーを低下させることがで
きる。FIG. 2 is a view showing details of the stirring blade.
2A is a plan view showing a state where the stirring blade 13 is mounted on the rotating shaft 9, FIG. 2B is a front view of FIG. 2A, and FIG.
Is a blade arm 13 of the stirring blade 13 on the side attached to the rotating shaft 9.
It is a figure which shows the end surface of '. As shown in FIG. 2A, the stirring blade 13 is composed of three tapered blade arms 13 '. Each wing arm 13 ′ has a shape obtained by cutting a cylindrical tube obliquely along the axial direction, and the lengths of the arcs at both end surfaces are different. In this embodiment, as shown in FIG. 2C, the rotation shaft side end surface 13a having the longer arc length is used.
Set the arc length so that the center angle of the arc is 80 °,
The lower end of the blade arm 13 ′ of the stirring blade 13 has a horizontal plane of 30 °.
It is formed into an acute angle so as to form a corner, and has a structure advantageous for scraping a cake. The arc length of the other end surface 13b of the wing arm 13 'is shorter than the rotation shaft side end surface 13a, as shown in FIGS. 2 (a) and 2 (b).
The blade arm 13 ′ has a curved surface facing upward and has a tapered shape, that is, a blade area at the tip is smaller than that on the fixed side. In addition, the driving energy can be reduced.
【0013】このように構成される本発明の濾過装置に
より、原料スラリー中の固体粒子を乾燥粉末状態で取り
出す方法を以下に各工程順に説明する。A method of extracting solid particles in a raw material slurry in a dry powder state by the filtration device of the present invention thus configured will be described below in the order of each step.
【0014】〔濾過・展延〕原料スラリーを上部のスラ
リー供給口1より槽本体4内に送給・充填した後、導管
15より供給されたガスで槽本体4内を加圧し、または
濾液排出系を減圧して濾過を行う。このとき、多孔質濾
過板7上の濾布6を経た濾液を下蓋8に設けた濾液排出
口5より系外に回収する。そして、原料スラリー中の固
形分は、濾布6上に湿潤したケーキ層をなして堆積す
る。この濾過工程において、撹拌翼13はケーキ層上方
に退避している。やがて、一定時間の濾過を経て、撹拌
翼13をケーキ層内にやや侵入させて一定速度で回転さ
せ、ケーキ層の中から水分を絞り出すようにして濾液排
出口5から排出する。この工程が、いわゆる展延工程で
ある。[Filtering and Spreading] After the raw material slurry is fed and filled into the tank body 4 from the upper slurry supply port 1, the inside of the tank body 4 is pressurized with the gas supplied from the conduit 15, or the filtrate is discharged. The system is vacuumed and filtered. At this time, the filtrate that has passed through the filter cloth 6 on the porous filter plate 7 is collected outside the system from the filtrate outlet 5 provided in the lower lid 8. The solid content in the raw material slurry is deposited on the filter cloth 6 in a wet cake layer. In this filtration step, the stirring blade 13 is retracted above the cake layer. Eventually, after filtration for a certain period of time, the stirring blade 13 is slightly penetrated into the cake layer and rotated at a constant speed, and the water is discharged from the filtrate discharge port 5 so as to squeeze out water from the cake layer. This step is a so-called spreading step.
【0015】〔ケーキ洗浄〕次いで、ケーキ中の異物を
洗浄するために、洗浄液配管14に洗浄液を送給し、先
端のノズル14aから洗浄液をケーキ上に噴霧し、撹拌
翼13をケーキ層内の一定位置で固定して一定速度で回
転させながら、ケーキ中の異物を洗浄液とともに濾液排
出口5から排出する。[Cake washing] Next, in order to wash foreign substances in the cake, the washing liquid is fed to the washing liquid pipe 14, and the washing liquid is sprayed onto the cake from the nozzle 14a at the tip, and the stirring blade 13 is moved to the inside of the cake layer. The foreign matter in the cake is discharged from the filtrate discharge port 5 together with the washing liquid while being fixed at a fixed position and rotating at a fixed speed.
【0016】〔掻取・乾燥〕槽本体4内を減圧するとと
もに、加熱ジャケット3内に熱媒を導入して槽本体4側
壁を加熱し、撹拌翼13を回転させつつ昇降させる。濾
布6上に湿潤したケーキ層をなして堆積した固形分は、
翼アーム13´の尖鋭な下端面にて掻取られつつ、翼ア
ーム13´が回転しつつ昇降することによって一様に混
合され、槽本体4側壁の加熱ジャケット3からの熱を受
けて乾燥が進行する。この工程が、いわゆる掻取工程で
ある。[Scraping / Drying] The inside of the tank main body 4 is depressurized, and a heating medium is introduced into the heating jacket 3 to heat the side wall of the tank main body 4 and to move the stirring blade 13 upward and downward while rotating the stirring blade 13. The solid content deposited as a wet cake layer on the filter cloth 6 is:
While being scraped by the sharp lower end surface of the wing arm 13 ′, the wing arm 13 ′ is rotated and moved up and down while being uniformly mixed, and is dried by receiving heat from the heating jacket 3 on the side wall of the tank body 4. proceed. This step is a so-called scraping step.
【0017】やがて、固形分の乾燥が一定程度まで進む
と、撹拌翼13の高さをケーキ層内の一定位置で固定し
て回転させつつ、さらに乾燥を進める。かくして粉体製
品が所定の乾燥状態に達した段階で、槽本体4内を大気
圧に戻し、加熱ジャケット3への熱媒の供給を停止し
て、乾燥工程は終了する。When the drying of the solid content progresses to a certain degree, the height of the stirring blade 13 is fixed at a fixed position in the cake layer and rotated, and the drying is further advanced. Thus, when the powder product reaches a predetermined dry state, the inside of the tank body 4 is returned to the atmospheric pressure, the supply of the heat medium to the heating jacket 3 is stopped, and the drying step is completed.
【0018】本実施例では、加熱ジャケット3を用いて
乾燥工程を行っているが、本発明は乾燥を行わない濾過
装置にも適用可能である。In the present embodiment, the drying step is performed by using the heating jacket 3, but the present invention can be applied to a filtration device that does not perform drying.
【0019】〔排出〕そして、撹拌翼13を槽本体4の
底部付近で回転させながら、粉体排出口2の開閉蓋17
を開き、粉体排出口2を経て乾燥した粉体製品を系外に
回収する。[Discharge] Then, while rotating the stirring blade 13 near the bottom of the tank body 4, the opening / closing lid 17 of the powder discharge port 2 is opened.
Is opened, and the dried powder product is collected outside the system through the powder discharge port 2.
【0020】本発明による濾過装置によれば、上記した
ような工程で湿潤粉体の濾過乾燥が行われるが、本発明
の装置による濾過乾燥作業中の回転トルクを、従来の形
式の装置による濾過乾燥作業中の回転トルクと比較する
ためのシミュレート実験を行ったので、以下に説明す
る。According to the filtering device of the present invention, the wet powder is filtered and dried in the above-mentioned steps. However, the rotational torque during the filtering and drying operation of the device of the present invention is reduced by a conventional type of filtering device. A simulated experiment was performed for comparison with the rotational torque during the drying operation, and will be described below.
【0021】シミュレート装置は、図3に示すような構
成である。同図を説明すると、枠体19の頭部に減速機
付きモータ20を備え、枠体19の下部にエアシリンダ
21を取り付け、エアシリンダ21のロッド21aにガ
イドバー22が接続され、該ガイドバー22は固定扞2
3に沿って昇降することが可能である。ガイドバー22
には昇降台24が固定されており、昇降台24には実験
槽25が連結されている。26は湿潤粉体(スラリ
ー)、27は濾布である。モータ20はベルト28を介
して回転軸29に連結され、回転軸29の先端には本発
明の撹拌翼(図2に示す構成のもの)または比較例の撹
拌翼が固着されている。比較例の撹拌翼は図6に示すよ
うに、3本の翼アーム30のそれぞれに、2個の掻取刃
翼30aを下方に向けて突設したものである。このよう
に構成される図3のシミュレート装置によれば、ロッド
21aを伸長・収縮することにより、固定扞23でガイ
ドしつつ、ガイドバー22とともに実験槽25を昇降さ
せることが可能である。The simulation device has a configuration as shown in FIG. Referring to FIG. 2, a motor 20 with a speed reducer is provided at the head of a frame 19, an air cylinder 21 is attached to a lower portion of the frame 19, and a guide bar 22 is connected to a rod 21a of the air cylinder 21. 22 is fixed rod 2
It is possible to go up and down along 3. Guide bar 22
Is fixed to an elevating table 24, and an experimental tank 25 is connected to the elevating table 24. 26 is a wet powder (slurry) and 27 is a filter cloth. The motor 20 is connected to a rotating shaft 29 via a belt 28, and the stirring blade of the present invention (having the configuration shown in FIG. 2) or the stirring blade of the comparative example is fixed to the tip of the rotating shaft 29. As shown in FIG. 6, the stirring blade of the comparative example has two blades 30a protruding downward from each of three blade arms 30. As shown in FIG. According to the simulation device of FIG. 3 configured as described above, the experimental tank 25 can be moved up and down together with the guide bar 22 while being guided by the fixed rod 23 by extending and contracting the rod 21a.
【0022】実験槽25の内径は500mmで、高さは4
00mm、撹拌翼の外径は480mmとし、濾布27は実験
槽25の底面から100mmの位置に取り付けた。そし
て、回転軸29にトルク検出器を取り付けて、以下の各
工程の回転トルクを測定した。The inside diameter of the experimental tank 25 is 500 mm and the height is 4 mm.
The outer diameter of the stirring blade was 480 mm, and the filter cloth 27 was attached at a position 100 mm from the bottom of the experimental tank 25. Then, a torque detector was attached to the rotating shaft 29, and the rotating torque in each of the following steps was measured.
【0023】実験方法は、実験の便宜上、実際の工程順
とは必ずしも一致せず、実機における動作を模した内容
とした。順次説明する。The experimental method does not always correspond to the actual process order for the sake of convenience of the experiment, and the contents simulate the operation in the actual machine. It will be described sequentially.
【0024】〔ケーキ洗浄〕実験に使用したスラリー
は、炭酸カルシウム粉体30kgに水40kgを混入し
たものである。撹拌翼の高さが濾布27より10mm上位
となる位置で実験槽25を固定し、回転軸29の回転数
を10rpm または30rpm として、回転トルクを測定し
た。このときの液面の高さは、実験槽25底面より約2
50mmの高さであった。炭酸カルシウム粉体は、嵩密度
1.4g/cm3 、平均粒度300μmのものである。[Cake Washing] The slurry used in the experiment was obtained by mixing 40 kg of calcium carbonate powder with 40 kg of water. The experimental tank 25 was fixed at a position where the height of the stirring blade was 10 mm higher than the filter cloth 27, and the rotation torque of the rotation shaft 29 was set to 10 rpm or 30 rpm, and the rotation torque was measured. The height of the liquid surface at this time was about 2
The height was 50 mm. The calcium carbonate powder has a bulk density of 1.4 g / cm 3 and an average particle size of 300 μm.
【0025】〔展延〕洗浄に使用したスラリー中の水分
を、開口31を通して500mmHgの減圧下で一定時間
をかけて濾過し、外見上水分がほぼなくなったと思われ
た段階で、回転軸29を10rpm の回転数で回転させつ
つ、撹拌翼の高さが湿潤ケーキ層上面より20mm下位と
なる位置で実験槽25を固定した場合、その位置で実験
槽25を5mm/min または10mm/min の速度で昇降さ
せた場合について、それぞれ回転トルクを測定した。な
お、この場合のケーキ層の高さは約90mmであった。[Spreading] The water in the slurry used for washing is filtered through the opening 31 under a reduced pressure of 500 mmHg for a certain period of time. When the experimental tank 25 is fixed at a position where the height of the stirring blade is 20 mm lower than the upper surface of the wet cake layer while rotating at a rotation speed of 10 rpm, the experimental tank 25 is moved at that position at a speed of 5 mm / min or 10 mm / min. The rotational torque was measured for each case of lifting and lowering. In this case, the height of the cake layer was about 90 mm.
【0026】〔掻取〕上記展延工程と同様に減圧濾過後
の湿潤ケーキを使用して、回転軸29を10rpm の回転
数で回転させつつ、撹拌翼の高さが湿潤ケーキ層上面よ
り52mm下位となる位置で実験槽25を固定した場合、
その位置で実験槽25を5mm/min 、10mm/min また
は20mm/min の速度で昇降させた場合と、撹拌翼の高
さが湿潤ケーキ層上面より85mm下位となる位置で実験
槽25を固定した場合、その位置で実験槽25を5mm/
min 、10mm/min または20mm/min の速度で昇降さ
せた場合について、それぞれ回転トルクを測定した。な
お、この場合のケーキ層の高さは約90mmであった。[Scraping] In the same manner as in the above spreading step, while using the wet cake after filtration under reduced pressure, while rotating the rotating shaft 29 at a rotation speed of 10 rpm, the height of the stirring blade is 52 mm from the upper surface of the wet cake layer. When the experiment tank 25 is fixed at a lower position,
The experimental tank 25 was fixed at that position when the experimental tank 25 was raised and lowered at a speed of 5 mm / min, 10 mm / min or 20 mm / min, and at a position where the height of the stirring blade was 85 mm below the upper surface of the wet cake layer. In that case, the experimental tank 25 was
The rotational torque was measured for each of the cases of raising and lowering at a speed of min, 10 mm / min or 20 mm / min. In this case, the height of the cake layer was about 90 mm.
【0027】〔乾燥〕実験槽25に上記炭酸カルシウム
粉体30kgを投入し、次いで、水2kgづつを4回に
分けて添加し(より実際の乾燥工程の状態に似せるた
め)、撹拌翼の高さが濾布27より10mm上位となる位
置で実験槽25を固定し、回転軸29を10rpm の回転
数で回転させつつ、最終的に添加した水の量が8kgに
なった段階で、回転トルクを測定した。[Drying] 30 kg of the above-mentioned calcium carbonate powder was put into the experimental tank 25, and then 2 kg of water was added in four portions (in order to more closely resemble the state of the actual drying step), and the height of the stirring blade was raised. The experimental tank 25 is fixed at a position where the height is 10 mm higher than the filter cloth 27, and the rotating shaft 29 is rotated at a rotation speed of 10 rpm. Was measured.
【0028】〔排出〕実験槽25に上記炭酸カルシウム
30kgのみを投入し、撹拌翼の高さが濾布27より1
0mm上位となる位置で実験槽25を固定し、回転軸29
を10rpm の回転数で回転させつつ、回転トルクを測定
した。[Discharge] Only 30 kg of the above calcium carbonate was put into the experimental tank 25, and the height of the stirring blade was 1
The experimental tank 25 is fixed at a position higher by 0 mm, and the rotating shaft 29
Was rotated at a rotation speed of 10 rpm, and the rotation torque was measured.
【0029】以上のトルク測定結果を以下の表1に示
す。The results of the above torque measurement are shown in Table 1 below.
【0030】[0030]
【表1】 [Table 1]
【0031】表1に明らかなように、本発明は全工程に
わたりトルクの変動が少なく、大きなトルクの発生もな
い。しかし、比較例はトルクの変動が大きく、特に掻
取、乾燥、排出工程で本発明の2倍以上のトルクを必要
とし、掻取および乾燥工程では極端に大きなトルクを必
要としている。展延、ケーキ洗浄工程で本発明のトルク
が比較例より少し高くなっているが、その差は僅かであ
り、全体的に見て本発明の撹拌翼はトルクの低減された
優れた撹拌翼であることがわかる。なお、本発明および
比較例の双方において、昇降速度は回転トルクの変化に
あまり影響を与えないことがわかる。As is clear from Table 1, the present invention has a small variation in torque over the entire process and no large torque is generated. However, the comparative example has a large fluctuation in the torque, and particularly requires twice or more the torque of the present invention in the scraping, drying and discharging steps, and requires an extremely large torque in the scraping and drying steps. In the spreading and cake washing steps, the torque of the present invention is slightly higher than that of the comparative example, but the difference is small. Overall, the stirring blade of the present invention is an excellent stirring blade with reduced torque. You can see that there is. In both of the present invention and the comparative example, it can be seen that the elevating speed does not significantly affect the change in the rotational torque.
【0032】図4は、表1のデータを抜き出して図示し
たもので、○は本発明の数値、△は比較例の数値を示
す。なお、展延時は実験槽昇降速度が10mm/min の場
合の回転トルク、掻取時は撹拌翼が湿潤ケーキ層上面よ
り85mm下位となる位置で実験槽25を10mm/min の
速度で昇降させた場合の回転トルクを示した。FIG. 4 is a diagram extracted from the data of Table 1, and ○ indicates a numerical value of the present invention, and Δ indicates a numerical value of a comparative example. In addition, the rotation torque when the elevating speed of the experimental tank was 10 mm / min during the spreading, and the scraping blade was raised and lowered at a speed of 10 mm / min at a position where the stirring blade was 85 mm below the upper surface of the wet cake layer during the scraping. The rotational torque in the case is shown.
【0033】[0033]
【発明の効果】本発明は上記のように構成されているの
で、次の効果を奏する。 撹拌翼は円筒形状の管体を該管体軸方向に沿って斜
めに切断しただけの単純な形状の翼アームからなるの
で、撹拌翼の洗浄性が改善される。 翼アームの形状が簡単であるから、特別な加工を必
要とせず、製造コストが低くなる。 翼アームが丸みを有し且つ先端部の翼面積が固定側
に比して小さいので、撹拌翼によるケーキの掻取時にも
大きな回転トルクが発生せず、駆動エネルギーを低下さ
せることができる。As described above, the present invention has the following advantages. Since the stirring blade is formed of a blade arm having a simple shape obtained by simply cutting a cylindrical tube obliquely along the axial direction of the tube, the washing performance of the stirring blade is improved. Since the shape of the wing arm is simple, no special processing is required and the manufacturing cost is reduced. Since the blade arm is rounded and the blade area at the tip is smaller than that on the fixed side, a large rotating torque is not generated even when the cake is scraped by the stirring blade, and the driving energy can be reduced.
【図1】本発明の濾過装置の縦断面図である。FIG. 1 is a longitudinal sectional view of a filtration device of the present invention.
【図2】図2(a)は、回転軸に本発明の撹拌翼を装着
した状態を示す平面図、図2(b)は図2(a)の正面
図、図2(c)は回転軸に取り付けた側の本発明の撹拌
翼の翼アームの端面を示す図である。2 (a) is a plan view showing a state where the stirring blade of the present invention is mounted on a rotating shaft, FIG. 2 (b) is a front view of FIG. 2 (a), and FIG. It is a figure which shows the end surface of the blade arm of the stirring blade of this invention of the side attached to the shaft.
【図3】濾過乾燥工程のシミュレート実験に使用した装
置の側面図である。FIG. 3 is a side view of an apparatus used for a simulation experiment of a filtration drying step.
【図4】濾過乾燥工程のシミュレート実験中の回転トル
クの変化を示す図である。FIG. 4 is a diagram showing a change in rotation torque during a simulation experiment of a filtration drying process.
【図5】図5(a)は従来の濾過乾燥装置の縦断面図、
図5(b)はその横断面図である。FIG. 5 (a) is a longitudinal sectional view of a conventional filtration and drying apparatus,
FIG. 5B is a cross-sectional view thereof.
【図6】図6(a)は濾過乾燥工程のシミュレート実験
に使用した比較例の撹拌翼を回転軸に装着した状態を示
す平面図、図6(b)は同上比較例の撹拌翼を回転軸に
装着した状態の側面図である。FIG. 6 (a) is a plan view showing a state where a stirring blade of a comparative example used in a simulation experiment of a filtration drying process is mounted on a rotating shaft, and FIG. 6 (b) is a drawing of a stirring blade of the comparative example. It is a side view of the state attached to the rotating shaft.
1…スラリー供給口 2…粉体排出口 3…加熱ジャケット 4…槽本体 5…濾液排出口 6…濾布 7…多孔質濾過板 8…下蓋 9…回転軸 13…撹拌翼 13´…翼アーム DESCRIPTION OF SYMBOLS 1 ... Slurry supply port 2 ... Powder discharge port 3 ... Heating jacket 4 ... Tank body 5 ... Filtrate discharge port 6 ... Filter cloth 7 ... Porous filter plate 8 ... Lower lid 9 ... Rotating shaft 13 ... Stirring blade 13 '... Blade arm
フロントページの続き (56)参考文献 特開 平2−187102(JP,A) 特開 平2−187101(JP,A) 特開 昭61−21708(JP,A) 特開 平6−277411(JP,A) 特開 平5−103919(JP,A) 特開 昭57−56006(JP,A) 特開 平1−184008(JP,A) 実開 平5−67304(JP,U) (58)調査した分野(Int.Cl.6,DB名) B01D 29/00 - 29/48 Continuation of the front page (56) References JP-A-2-187102 (JP, A) JP-A-2-187101 (JP, A) JP-A-61-21708 (JP, A) JP-A-6-277411 (JP) JP-A-5-103919 (JP, A) JP-A-57-56006 (JP, A) JP-A-1-184008 (JP, A) JP-A-5-67304 (JP, U) (58) Surveyed field (Int. Cl. 6 , DB name) B01D 29/00-29/48
Claims (1)
ー供給口を有する槽本体と、濾液排出口を有し且つ濾材
および濾板を重層支持して本体下部に設けた下蓋と、槽
本体の中心に縦設した回転軸と、該回転軸の下端部に取
り付けられて濾過ケーキを掻き取り・撹拌する複数の翼
アームを有してなる撹拌翼とを備え、且つ粉体排出口を
設けた濾過装置において、 上記撹拌翼の翼アームは円筒形状の管体を該管体軸方向
に沿って斜めに切断した形状であって、円弧状の両端面
の中で円弧長の短い方を先端側とし、円弧長の長い方を
回転軸に固着したことを特徴とする濾過装置。1. A tank body formed in a bell-shaped housing and having a slurry supply port, a lower lid having a filtrate discharge port and provided at a lower portion of the body with a filter medium and a filter plate supported in layers, A rotating shaft vertically provided at the center, a stirring blade attached to a lower end portion of the rotating shaft and having a plurality of blade arms for scraping and stirring the filter cake, and a powder discharge port were provided. In the filtration device, the blade arm of the stirring blade has a shape obtained by cutting a cylindrical tube obliquely along the axial direction of the tube, and the shorter arc length of the arc-shaped end faces is closer to the distal end. A filter having a longer arc length fixed to a rotating shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6305049A JP2922802B2 (en) | 1994-12-08 | 1994-12-08 | Filtration device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6305049A JP2922802B2 (en) | 1994-12-08 | 1994-12-08 | Filtration device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08155216A JPH08155216A (en) | 1996-06-18 |
JP2922802B2 true JP2922802B2 (en) | 1999-07-26 |
Family
ID=17940504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6305049A Expired - Fee Related JP2922802B2 (en) | 1994-12-08 | 1994-12-08 | Filtration device |
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Country | Link |
---|---|
JP (1) | JP2922802B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100645500B1 (en) | 2005-05-27 | 2006-11-14 | 주식회사 한강엔지니어링 | Filtering apparatus for experiment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111729396A (en) * | 2020-06-24 | 2020-10-02 | 江西金海环保设备有限公司 | Sewage treatment is with filtering sedimentation case that has automatic blowdown function |
JP7085679B1 (en) * | 2021-04-19 | 2022-06-16 | 三菱化工機株式会社 | Processing method using a filtration device |
-
1994
- 1994-12-08 JP JP6305049A patent/JP2922802B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100645500B1 (en) | 2005-05-27 | 2006-11-14 | 주식회사 한강엔지니어링 | Filtering apparatus for experiment |
Also Published As
Publication number | Publication date |
---|---|
JPH08155216A (en) | 1996-06-18 |
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