【発明の詳細な説明】[Detailed description of the invention]
本発明は紙、パルプ業界において異物の混入す
る原料から渦巻によつて異物を除去する装置に関
する。
従来紙、パルプ用の原料から渦流により異物を
除去する機械は、セントリクリーナーとして周知
である。このものは図面第１図に示す様に下方が
小径につぼまつた円錐筒１を直立させてその下端
を異物の出口２とし、上部の中央に精選原料の出
口３を設け、外周に接線状に処理原料の入口４を
設けたもので、処理原料をその入口４から高圧力
で円錐筒１内へ圧入すると、原料は円錐筒１内で
高速度の旋回運動を起して遠心力を発生する。こ
のため原料中の繊維と異物とは比重差によつて分
離され、異物は円錐筒１内の外側を下降して出口
２へ排出され、繊維は円錐筒１の中央部を上昇し
て精選原料の出口３より送り出されるものであ
る。しかし、このものは円錐の下部が小径である
ため、比重の大きい異物と小さい繊維とが接近し
て存在し、旋回力が弱れば、外側に寄つていた異
物が中央へ移動して、繊維の上昇流中へ巻き込ま
れ、原料の精選度を低下させることになる。この
ため処理原料の圧入は高圧ポンプを用いて行い、
入口と出口との圧力差を２Kg／cm2以上とする必要
がある。
本発明は、この欠点を解消するためになされた
もので、直円筒にテーパー状の中子を内設し、両
者の環状空間を下方へ及ぶに従つて縮少させるこ
とにより、低い圧力差で高い精選度が得られる
紙、パルプ用渦流式除塵機を提供することを目的
とする。
次に本発明に関する紙、パルプ用渦流式除塵機
の実施の一例を図面に付き説明すれば下記の通り
である。
図面第２図及び第３図において５は直立させた
円筒で、その上部の中央に誘導部６を円筒４内に
挿入した精選紙料の出口６を設け、外周には接線
状に処理原料の入口７を設けてある。８は前記円
筒５の内側に円筒５と同心状に設けた中子で、そ
の形状を上端を尖らせ、この尖つた部分から下方
を徐々に増径させてテーパー状とし、中子８と円
筒５との間に形成される環状空間ａを下方へ及ぶ
に従つて縮少させるため図面第２図に示す弾丸形
か、第４図に示す円錐形、或は図面第５図に示す
アンプル形等とし、その尖つた上端が精選原料出
口６における誘導部６の下方に対応する高さと
し、下端で円筒５の底部へ固定するもので、この
中子８の形状は原料の濃度種別等により図面第４
図及び第５図に示す様に変更することもある。９
は中子８と円筒５との間に環状空間ｃの下端に合
せて円筒５の底面に設けた異物の出口で、後記す
る異物室へ異物を落す下降管１０を接続してあ
る。１１は異物室で、一側上部に前記した下降管
１０を接続し、他側上部に前記中子８の中心に通
して上端を円筒５内に開口させた繊維の戻し管１
２を接続してあり、この戻し管１２と前記下降管
１０との間には上壁から室の中途に達する遮壁１
３を設けてあり、且つ、この異物室１１の異物下
降側の上部に圧力水の供給管１４を接続して開閉
弁１５を備えさせ、下部に異物の取出部１６を設
けたものである。
前記の様に構成される除塵機において、例えば
円筒５の直径300mm，高さ1000mm、中子８の大径
側の直径260mm，高さ600mmとした場合、円筒５の
上端から紙料濃度１％の処理原料を揚程15mのポ
ンプにより接線状に設けた入口７から圧入すれ
ば、原料は円筒５の内壁に誘導されて高速度の旋
回運動を起し、遠心力を受けるものであつて、こ
の遠心力は物品の比重に比例する。従つて、原料
中に混入する比重の大きい異物は円筒５の外側へ
寄せられ、比重の小さい繊維は中央部にあつて比
重差で分離され、比重の大きい異物は円筒５の内
壁に沿つて旋回しつゝ下降し、出口９から下降管
１０を経て異物室１１へ排出され、比重の小さい
繊維は円筒５の中央部を旋回しつゝ上昇し、誘導
部６′に入つて出口６から精選原料として送り出
されるもので、然も、この除塵機は円筒５内にテ
ーパー状の中子８が存在し、円筒５内の環状空間
ａを下方へ及ぶに従つて小さくし、原料の旋回力
の減衰を少くすると共に、異物を狭い環状空間ａ
内に留保して、例え旋回力が弱まつても、円筒５
の中央の旋回上昇流に巻き込ませない様に作用す
るものである。従つて、この除塵機Ａは同一処理
量の従来品Ｂに比べて下表の通り優れた性能を示
すもものである。
TECHNICAL FIELD The present invention relates to a device used in the paper and pulp industry to remove foreign matter from raw materials contaminated with foreign matter using a swirl. A machine that removes foreign matter from raw materials for paper and pulp using a whirlpool is known as a sentry cleaner. As shown in Figure 1 of the drawing, a conical cylinder 1 with a small diameter at the bottom is stood upright, its lower end serves as an outlet 2 for foreign matter, an outlet 3 for selected raw materials is provided in the center of the upper part, and a tangential line is formed on the outer periphery. An inlet 4 for the raw material to be treated is provided at the inlet 4, and when the raw material to be treated is forced into the conical cylinder 1 through the inlet 4 under high pressure, the raw material causes a high-speed swirling motion within the conical cylinder 1 and generates centrifugal force. do. Therefore, the fibers and foreign matter in the raw material are separated by the difference in specific gravity, the foreign matter descends on the outside of the conical tube 1 and is discharged to the outlet 2, and the fibers rise through the center of the conical tube 1 and are used as the selected raw material. It is sent out from outlet 3 of. However, since the lower part of this cone has a small diameter, foreign particles with high specific gravity and small fibers exist close together, and if the swirling force is weakened, the foreign particles that were on the outside will move to the center. It gets caught up in the upward flow of fibers, reducing the degree of selection of the raw material. For this reason, the raw materials to be processed are press-ined using a high-pressure pump.
The pressure difference between the inlet and outlet must be 2 kg/cm 2 or more. The present invention was made to eliminate this drawback, and by installing a tapered core inside a right cylinder and reducing the annular space between the two as it extends downward, a low pressure difference can be achieved. The purpose of the present invention is to provide a whirlpool type dust remover for paper and pulp that can obtain a high degree of selection. Next, an example of the implementation of the vortex type dust remover for paper and pulp according to the present invention will be described below with reference to the drawings. In Figures 2 and 3 of the drawings, reference numeral 5 is an upright cylinder, with an outlet 6 for the selected stock having a guiding part 6 inserted into the cylinder 4 in the center of its upper part, and a tangential outlet for the raw material to be processed on the outer periphery. An entrance 7 is provided. Reference numeral 8 denotes a core provided concentrically with the cylinder 5 inside the cylinder 5, and its shape is sharpened at the upper end, and the diameter gradually increases downward from this pointed part to form a tapered shape. In order to reduce the annular space a formed between 5 and 5 as it extends downward, it is shaped like a bullet as shown in FIG. 2, a cone as shown in FIG. 4, or an ampoule shape as shown in FIG. 5. The height of the pointed upper end corresponds to the lower part of the guiding part 6 at the selected raw material outlet 6, and the lower end is fixed to the bottom of the cylinder 5. The shape of this core 8 is determined according to the concentration type of the raw material, etc. Fourth
Modifications may be made as shown in Figures and Figure 5. 9
is an outlet for foreign matter provided on the bottom surface of the cylinder 5 between the core 8 and the cylinder 5 in alignment with the lower end of the annular space c, and is connected to a descending pipe 10 for dropping foreign matter into a foreign matter chamber to be described later. Reference numeral 11 designates a foreign matter chamber, in which the above-mentioned descending pipe 10 is connected to the upper part of one side, and a return pipe 1 for fibers, which passes through the center of the core 8 and opens its upper end into the cylinder 5, is connected to the upper part of the other side.
2 is connected, and between this return pipe 12 and the downcomer pipe 10 there is a shielding wall 1 that reaches halfway from the upper wall to the chamber.
3, a pressurized water supply pipe 14 is connected to the upper part of the foreign matter descending side of the foreign matter chamber 11, and an on-off valve 15 is provided, and a foreign matter removal section 16 is provided at the lower part. In the dust remover configured as described above, for example, if the diameter of the cylinder 5 is 300 mm and the height is 1000 mm, and the diameter of the large diameter side of the core 8 is 260 mm and the height is 600 mm, the paper stock concentration is 1% from the upper end of the cylinder 5. When the raw material to be treated is injected through the tangentially arranged inlet 7 by a pump with a lift of 15 m, the raw material is guided to the inner wall of the cylinder 5, causes a high-speed swirling motion, and is subjected to centrifugal force. Centrifugal force is proportional to the specific gravity of the article. Therefore, foreign matter with a high specific gravity mixed in the raw material is gathered to the outside of the cylinder 5, fibers with a low specific gravity are separated in the center by the difference in specific gravity, and foreign matter with a high specific gravity swirls along the inner wall of the cylinder 5. The fibers gradually descend and are discharged from the outlet 9 through the downcomer pipe 10 to the foreign matter chamber 11, and the fibers with low specific gravity ascend while swirling around the center of the cylinder 5, enter the guide section 6', and are carefully selected from the outlet 6. This dust remover has a tapered core 8 inside the cylinder 5, and the annular space a inside the cylinder 5 is made smaller as it extends downward, reducing the swirling force of the raw material. In addition to reducing attenuation, foreign objects are removed from the narrow annular space a.
Even if the turning force weakens, the cylinder 5
This acts to prevent the air from being caught in the swirling upward flow at the center of the air. Therefore, this dust remover A shows superior performance compared to the conventional product B with the same throughput as shown in the table below.
【表】
又、この除塵機は、図面第２図の様に中子８の
中心に上端が円筒５内において誘導筒６に対応す
る繊維の戻し管１２を設け、この戻し管１２を円
筒４の出口９から異物を排出される異物室１１に
連通させて置けば、異物室１１に落ちた異物の中
から混入繊維を分離して戻し管１２により円筒５
内へ戻し、精選原料として出口６から取り出すこ
とができるものである。
本発明に関する紙，パルプ用渦流式除塵機は、
直立させた円筒と、この円筒の上部中央に設けた
精選原料の出口と、円筒の上部外周に接線上に開
口させた処理原料の入口と、前記円筒内に内筒と
の空間が下方へ及ぶに従つて狭くなる様に設けた
中子と、この中子と円筒との空間の下端に設けた
異物出口とを備えさせた技術により、入口から円
筒内へ接線状に圧入した処理原料を円筒内におい
て旋回させるとき、テーパー状中子の存在により
之と円筒との環状空間を下方へ及ぶに従つて縮少
させ、旋回力の減衰を小さくして分離能力の低下
を可及的に少くすると共に、環状空間へ入つた異
物を中子によりこの空間に留保して旋回力が低下
しても、異物が繊維の上昇流へ巻き込まれない様
に作用するから、この除塵機は入口と出口との圧
力差を前記性能比較表の通り、従来機の1/10に下
げても同一の能力が発揮されるから、一般の低揚
程ポンプを利用出来る凡用性があつて、その設備
費が大巾に低減されるだけでなく、動力費節減の
効果が大であり、又、精選原料中には殆んど異物
が認められない高い精選度が得られる特有の効果
を奏するものである。[Table] In addition, this dust remover is provided with a fiber return pipe 12 whose upper end corresponds to the guide cylinder 6 in the cylinder 5 at the center of the core 8, as shown in Fig. 2 of the drawing, and which is connected to the cylinder 4. If the foreign matter chamber 11 is connected to the foreign matter chamber 11 from which foreign matter is discharged from the outlet 9 of the cylinder 5, the mixed fibers are separated from the foreign matter that has fallen into the foreign matter chamber 11 and returned to the cylinder 5 through the return pipe 12.
It can be returned to the interior and taken out from the outlet 6 as a selected raw material. The vortex dust remover for paper and pulp according to the present invention includes:
A space between an upright cylinder, an outlet for the selected raw material provided at the center of the upper part of the cylinder, an inlet for the raw material to be treated opened tangentially to the upper outer periphery of the cylinder, and an inner cylinder within the cylinder extends downward. By using a technology that includes a core that becomes narrower as the temperature increases, and a foreign matter outlet that is located at the lower end of the space between the core and the cylinder, the raw material to be processed, which is press-fitted tangentially into the cylinder from the inlet, is transferred into the cylinder. When turning inside the cylinder, the presence of the tapered core reduces the annular space between the core and the cylinder as it extends downward, reducing the attenuation of the turning force and minimizing the drop in separation ability. At the same time, the foreign matter that has entered the annular space is retained in this space by the core, so that even if the turning force decreases, the foreign matter will not be caught up in the upward flow of the fibers, so this dust remover has an inlet and an outlet. As shown in the performance comparison table above, the same performance can be achieved even if the pressure difference is reduced to 1/10 of that of the conventional model, so it is versatile enough to use a general low head pump, and the equipment cost is high. Not only is the width reduced, but the effect of reducing power costs is significant, and it also has the unique effect of obtaining a high degree of selection in which almost no foreign matter is found in the selected raw materials.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は従来の紙，パルプ用渦流除塵機の縦断
正面図。第２図は本発明に関する紙，パルプ用渦
流除塵機の実施の一例を示す縦断正面図。第３図
は第２図のＡ−Ａ線における横断平面図。第４図
及び第５図は中子の他の実施例を示す正面図であ
る。
図中５は円筒、６は精選原料の出口、７は処理
原料の入口、８は中子、９は異物出口、ａは環状
空間である。
Figure 1 is a longitudinal sectional front view of a conventional vortex dust remover for paper and pulp. FIG. 2 is a longitudinal sectional front view showing an example of the implementation of the vortex dust remover for paper and pulp according to the present invention. FIG. 3 is a cross-sectional plan view taken along line A-A in FIG. 2. 4 and 5 are front views showing other embodiments of the core. In the figure, 5 is a cylinder, 6 is an outlet for selected raw materials, 7 is an inlet for processed raw materials, 8 is a core, 9 is a foreign matter outlet, and a is an annular space.