JP3426128B2 - Wastepaper deinking treatment method and floatator - Google Patents
Wastepaper deinking treatment method and floatatorInfo
- Publication number
- JP3426128B2 JP3426128B2 JP00135598A JP135598A JP3426128B2 JP 3426128 B2 JP3426128 B2 JP 3426128B2 JP 00135598 A JP00135598 A JP 00135598A JP 135598 A JP135598 A JP 135598A JP 3426128 B2 JP3426128 B2 JP 3426128B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- material liquid
- paper raw
- processing tank
- used paper
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Paper (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、古紙からインキを
除去するための古紙脱墨処理方法およびこの脱墨処理方
法を実現し得るフローテーターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a used paper deinking method for removing ink from used paper and a floater capable of realizing the deinking method.
【０００２】[0002]
【従来の技術】再生紙は、一般に、印刷済みの古紙を離
解し、この古紙繊維に付着したインキを除去し、精選・
脱水した後、これを再び抄紙することにより得られる。
この場合、古紙繊維からインキを除去する脱墨処理に関
する事項は、後に続く精選処理に要する時間や、再生紙
の製造コストおよび品質を大きく左右する重要な因子と
なる。BACKGROUND OF THE INVENTION Recycled paper is generally selected by disintegrating printed waste paper, removing the ink adhering to the waste paper fibers, and carefully selecting
After dehydration, it is obtained by making paper again.
In this case, matters relating to the deinking treatment for removing the ink from the waste paper fibers are important factors that greatly influence the time required for the subsequent selective treatment, the manufacturing cost and the quality of the recycled paper.
【０００３】古紙脱墨処理を行うためのフローテーター
においては、離解され、薬品処理された古紙原料液に気
泡を吹き込み、古紙原料液中の古紙繊維から遊離したイ
ンキ粒子を古紙原料液中を上昇する気泡に付着させ、古
紙原料液表面に浮き上がるフロス、すなわちインキ粒子
が付着した気泡を古紙原料液から排除することにより、
古紙原料液中のインキ粒子を除去するようにしている。
この場合、古紙原料液中に微細な気泡を均等に供給し、
古紙原料液中に浮遊するインキ粒子と気泡とが接触する
機会を増やすようすることが、大きな脱墨効果を得る上
で重要であり、例えば、特公平６−６０４７３号公報な
どに開示されているように、従来から種々のフローテー
ターが提案されている。In a floater for deinking waste paper, air bubbles are blown into the disintegrated and chemically treated waste paper raw material liquid, and ink particles released from the waste paper fiber in the waste paper raw material liquid rise in the waste paper raw material liquid. By removing the floss floating on the surface of the waste paper raw material liquid, that is, the bubbles with ink particles attached, from the waste paper raw material liquid,
The ink particles in the waste paper raw material liquid are removed.
In this case, evenly supplying fine air bubbles to the waste paper raw material liquid,
It is important to obtain a large deinking effect by increasing the chances of contact between the ink particles floating in the used paper raw material liquid and the bubbles, and for example, it is disclosed in Japanese Patent Publication No. 6-60473. As described above, various floatators have been conventionally proposed.
【０００４】このような従来の古紙脱墨処理を行うフロ
ーテーターの概略構造を図３に示す。すなわち、２連構
造の処理槽１０１, １０２のそれぞれ下部には、外周面
に多数の空気吹き出しノズル１０３を放射状に突設した
回転式散気管１０４が配置されており、一方の処理槽１
０１の上部には、原料液入口１０５が設けられ、他方の
処理槽１０２の上部には原料液出口１０６が設けられ、
これら２つの処理槽１０１, １０２を仕切る仕切り壁１
０７の上部には、一方の処理槽１０１の原料液出口とな
ると共に他方の処理槽の原料液入口となる連通口１０８
が設けられている。また、処理槽１０１, １０２の上端
部には、これら処理槽１０１, １０２に導入される古紙
原料液１０９の表面に浮き上がるフロス１１０を溢流さ
せて処理槽１０１, １０２外に排出するための複数のフ
ロス樋１１１が設けられている。FIG. 3 shows a schematic structure of a floatator for performing such conventional waste paper deinking processing. That is, a rotary air diffusing pipe 104 having a large number of air blowing nozzles 103 radially arranged on the outer peripheral surface thereof is disposed below each of the processing tanks 101 and 102 having a double structure.
01 is provided with a raw material liquid inlet 105, and the other processing tank 102 is provided with a raw material liquid outlet 106 at the upper portion.
Partition wall 1 for partitioning these two processing tanks 101, 102
On the upper part of 07, a communication port 108 which serves as a raw material liquid outlet of one processing tank 101 and serves as a raw material liquid inlet of the other processing tank 101.
Is provided. In addition, a plurality of floss 110 floating on the surface of the used paper raw material liquid 109 introduced into the processing tanks 101 and 102 is overflowed at the upper ends of the processing tanks 101 and 102 to be discharged to the outside of the processing tanks 101 and 102. A floss gutter 111 is provided.
【０００５】従って、原料液入口１０５から第１の処理
槽１０１内に供給される古紙原料液１０９は、仕切り壁
１０７の連通口１０８を介して第２の処理槽１０２内に
供給され、原料液出口１０６から取り出される。この間
に、各処理槽１０１, １０２に設けられた回転式散気管
１０４の回転運動に伴い、これらの空気吹き出しノズル
１０３から吹き出される気泡と古紙原料液１０９とが攪
拌されて気泡にインキ粒子が付着し、フロス１１０とな
って古紙原料液１０９の表面に浮き上がり、フロス樋１
１１内に溢流して処理槽１０１, １０２外に排出される
ため、インキ粒子を除去した古紙原料液１０９が原料液
出口１０６から取り出されるようになっている。Therefore, the used paper raw material liquid 109 supplied from the raw material liquid inlet 105 into the first processing tank 101 is supplied into the second processing tank 102 through the communication port 108 of the partition wall 107, and the raw material liquid is supplied. It is taken out from the outlet 106. In the meantime, the bubbles blown from the air blowing nozzle 103 and the waste paper raw material liquid 109 are agitated with the rotational movement of the rotary air diffuser 104 provided in each of the processing tanks 101 and 102, and ink particles are contained in the bubbles. It adheres and becomes floss 110 and floats on the surface of the waste paper raw material liquid 109, and floss gutter 1
Since it overflows into 11 and is discharged out of the processing tanks 101 and 102, the used paper raw material liquid 109 from which ink particles have been removed is taken out from the raw material liquid outlet 106.
【０００６】[0006]
【発明が解決しようとする課題】図３に示した従来のフ
ローテーターは、連通口１０８が仕切り壁１０７の上部
に設けられているため、大量のフロス１１０を含む古紙
原料液１０９が第２の処理槽１０２に流れ込む上、原料
液出口１０６が第２の処理槽１０２の上部に設けられて
いるため、フロス１１０を充分に除去し切れていない古
紙原料液１０９が取り出されて回収されることとなる。
このようなことから、処理槽１０２を直列に多数（例え
ば、４つ）連結したフローテーターを使用してフロス１
１０の除去を行う必要があり、設備が大型化する割りに
はフロス１１０の除去を充分に行うことが困難であっ
た。しかも、後に続く精選処理に多大の時間を費やす必
要があり、製造コストが嵩んでしまう欠点があった。In the conventional floater shown in FIG. 3, since the communication port 108 is provided in the upper part of the partition wall 107, the waste paper raw material liquid 109 containing a large amount of the floss 110 is the second one. In addition to flowing into the processing tank 102, since the raw material liquid outlet 106 is provided above the second processing tank 102, the waste paper raw material liquid 109 that has not completely removed the froth 110 can be taken out and recovered. Become.
For this reason, the floss 1 is formed by using a floater in which a large number (for example, four) of the processing tanks 102 are connected in series.
It was necessary to remove 10, and it was difficult to remove floss 110 sufficiently even though the equipment became large. In addition, it is necessary to spend a great deal of time on the subsequent selection process, which has a drawback of increasing the manufacturing cost.
【０００７】[0007]
【発明の目的】本発明の目的は、回収される古紙原料液
に巻き込まれるフロスを少なくすることによって、イン
キ除去を効率良く行い得る古紙脱墨処理方法およびこの
古紙脱墨処理方法を実現し得るフローテーターを提供す
ることにある。SUMMARY OF THE INVENTION The object of the present invention is to realize a used paper deinking method and a used paper deinking method capable of efficiently removing ink by reducing the amount of froth entrained in the recovered used paper raw material liquid. To provide a floater.
【０００８】[0008]
【課題を解決するための手段】本発明の第１の形態は、
古紙原料液を導入する処理槽の下部から気泡を吹き込
み、この気泡の表面に前記古紙原料液中に介在するイン
キ粒子を付着させ、当該気泡を前記処理槽の上部から溢
流させ、前記古紙原料液から前記インキ粒子を除去する
ようにした古紙脱墨処理方法であって、前記古紙原料液
を前記処理槽の下部に供給するステップと、前記処理槽
の上部から前記古紙原料液を気液分離槽に導入するステ
ップと、前記気液分離槽に導入された前記古紙原料液中
の気泡の未分離分を前記処理槽の上部に浮上させて排出
するステップと、気泡が除去された前記古紙原料液を前
記気液分離槽の下端部から取り出すステップとを具えた
ことを特徴とするものである。The first aspect of the present invention is as follows.
Bubbles are blown from the lower part of the processing tank for introducing the used paper raw material liquid, ink particles intervening in the used paper raw material liquid are attached to the surface of the bubbles, and the bubbles are made to overflow from the upper part of the processing tank. A used paper deinking method for removing the ink particles from a liquid, the step of supplying the used paper raw material liquid to the lower part of the processing tank, and the gas-liquid separation of the used paper raw material liquid from the upper part of the processing tank. A step of introducing into the tank, a step of floating and discharging the unseparated portion of the bubbles in the waste paper raw material liquid introduced into the gas-liquid separation tank to the upper part of the processing tank, and the waste paper raw material from which bubbles have been removed And a step of taking out the liquid from the lower end portion of the gas-liquid separation tank.
【０００９】ここで、複数の前記処理槽と複数の前記気
液分離槽とが交互に直列に連結されていることが望まし
い。また、前記気液分離槽内を流下する前記古紙原料液
の流速は、毎秒０.005〜０.05 ｍの範囲にあることが望
ましく、さらに、前記処理槽の下部で回転駆動されると
共に内部に空気が圧送される円筒状のドラムと、このド
ラムの外周面に放射状に突設されて前記処理槽内の前記
古紙原料液中に気泡を噴出させる複数の空気吹き出しノ
ズルとを有する回転散気管を用い、前記処理槽の下部か
ら気泡を吹き込むことが望ましい。また、前記処理槽に
吹き込まれて気泡を形成するための空気供給量をＧ（Ｎ
ｍ3 ／時）、またはｇ（Ｎｍ3 ／分）、前記古紙原料液
の流量をＬ（ｍ3 ／時）、前記処理槽の水平面に沿った
断面積をＡ（ｍ2 ）とした場合、
３≦Ｇ／Ｌ≦２０かつ
０. ２≦ｇ／Ａ≦２. ０
を満足するものであることが望ましい。[0009] Here, it is desirable that the plurality of processing tanks and the plurality of gas-liquid separation tanks are alternately connected in series. Further, the flow rate of the used paper raw material liquid flowing down in the gas-liquid separation tank is preferably in the range of 0.005 to 0.05 m / sec. A rotary diffusing pipe having a cylindrical drum to which air is pressure-fed, and a plurality of air blowing nozzles radially projecting from the outer peripheral surface of the drum to eject air bubbles into the used paper raw material liquid in the processing tank. It is desirable to blow bubbles from the lower part of the processing tank by using the above. Further, the air supply amount for forming bubbles by being blown into the processing tank is G (N
m 3 / hour), or g (Nm 3 / minute), the flow rate of the waste paper raw material liquid is L (m 3 / hour), and the cross-sectional area along the horizontal plane of the treatment tank is A (m 2 ), It is preferable that 3 ≦ G / L ≦ 20 and 0.2 ≦ g / A ≦ 2.0 are satisfied.
【００１０】また、本発明の第２の形態は、古紙原料液
を導入する処理槽の下部から気泡供給手段によって気泡
を吹き込み、この気泡の表面に前記古紙原料液中に介在
するインキ粒子を付着させ、当該気泡を前記処理槽の上
部から溢流させ、前記古紙原料液中から前記インキ粒子
を除去するようにしたフローテーターであって、前記処
理槽の下部に設けられて前記古紙原料液を処理槽内に供
給するための原料液入口と、前記処理槽内の前記古紙原
料液を導入するための原料液導入口を上端部に有し、下
端部に前記古紙原料液を取り出すための原料液出口が設
けられた気液分離槽とを具えたことを特徴とするもので
ある。In the second embodiment of the present invention, bubbles are blown from the lower part of the processing tank for introducing the used paper raw material liquid by the bubble supply means, and the ink particles existing in the used paper raw material liquid are attached to the surfaces of the bubbles. A bubbler overflowing the bubbles from the upper part of the processing tank to remove the ink particles from the waste paper raw material liquid, the waste paper raw material liquid being provided at the bottom of the processing tank. A raw material liquid inlet for supplying into the processing tank, and a raw material liquid inlet for introducing the used paper raw material liquid in the processing tank at the upper end portion, and a raw material for taking out the used paper raw material liquid at the lower end portion And a gas-liquid separation tank provided with a liquid outlet.
【００１１】ここで、前記気液分離槽は、前記処理槽内
の前記古紙原料液の液面よりも低い位置から前記処理槽
の底面に至る１枚の仕切り板によって仕切られて構成さ
れ、この仕切り板の上端によって形成される開口部から
前記処理槽内の前記古紙原料液が前記気液分離槽内に導
入されるものであることが望ましい。また、複数の前記
処理槽と複数の前記気液分離槽とが交互に直列に連結さ
れていることが望ましい。さらに、前記気泡供給手段
は、処理槽の下部に回転自在に設置されて回転駆動され
ると共に内部に空気が圧送される円筒状のドラムと、こ
のドラムの外周面に放射状に突設されて前記処理槽内の
前記古紙原料液中に気泡を噴出させる複数の空気吹き出
しノズルとを有する回転散気管であることが望ましい。Here, the gas-liquid separation tank is constituted by a partition plate extending from a position lower than the liquid level of the used paper raw material liquid in the processing tank to the bottom surface of the processing tank. It is preferable that the used paper raw material liquid in the processing tank is introduced into the gas-liquid separation tank through an opening formed by the upper end of the partition plate. In addition, it is desirable that the plurality of processing tanks and the plurality of gas-liquid separation tanks are alternately connected in series. Further, the bubble supply means is rotatably installed in the lower part of the processing tank, is driven to rotate, and has a cylindrical drum into which air is pumped, and the outer peripheral surface of the drum is radially protruded so as to project. It is desirable that the rotary air diffuser has a plurality of air blowing nozzles for ejecting bubbles into the waste paper raw material liquid in the processing tank.
【００１２】[0012]
【作用】本発明によると、処理槽の下部から吹き込まれ
る気泡は、原料液入口から供給された古紙原料液と攪拌
され、古紙原料液中に介在するインキ粒子が付着したフ
ロスとなって古紙原料液の表面に浮き上がり、処理槽の
上端部から外部に溢流して除去される。According to the present invention, the bubbles blown from the lower part of the processing tank are agitated with the waste paper raw material liquid supplied from the raw material liquid inlet, and become the floss with the ink particles present in the waste paper raw material liquid adhering. It floats on the surface of the liquid and overflows and is removed from the upper end of the processing tank.
【００１３】また、原料液導入口から気液分離槽に流入
する古紙原料液は、その原料液出口に向けて流下する間
に、この古紙原料液に混在する未分離フロスが処理槽の
上部に向けて浮上し、除去される結果、原料液出口から
取り出される古紙原料液は、フロスの含有率が少ないも
のとなっている。Further, while the used paper raw material liquid flowing from the raw material liquid inlet into the gas-liquid separation tank flows down toward the raw material liquid outlet, unseparated floss mixed with the used paper raw material liquid is present in the upper part of the processing tank. As a result of being floated toward and removed, the waste paper raw material liquid taken out from the raw material liquid outlet has a low froth content.
【００１４】[0014]
【発明の実施の形態】本発明による古紙脱墨処理方法を
実現し得る本発明によるフローテーターの一実施例につ
いて、その概略構造を表す図１およびこのフローテータ
ーに組み込まれる回転式散気管の外観を表す図２を参照
しながら詳細に説明するが、本発明はこのような実施例
に限らず、同様な課題を内包する他の分野の技術にも応
用することができる。1 shows a schematic structure of an embodiment of a floater according to the present invention capable of realizing the used paper deinking method according to the present invention, and the appearance of a rotary air diffuser incorporated in the floater. 2 will be described in detail, but the present invention is not limited to such an embodiment, but can be applied to a technique in another field including the same problem.
【００１５】すなわち、所定量の古紙原料液１１をそれ
ぞれ導入する２連構造の処理槽１２, １３は、仕切り壁
１４を介して相互に連結された状態となっている。一方
の処理槽（以下、これを第１の処理槽と呼称する）１２
の下部の一端側には、先行する離解工程で得られた古紙
原料液１１をこの第１の処理槽１２内に供給するための
原料液入口１５が設けられ、他方の処理槽（以下、これ
を第２の処理槽と呼称する）１３の下部の他端側には、
この第２の処理槽１３内の古紙原料液１１を取り出して
次の精選工程へ供給するための原料液出口１６が設けら
れている。また、仕切り壁１４の下端には、第１の処理
槽１２側と第２の処理槽１３側とを連通する連通口１７
が形成され、この連通口１７を介して第１の処理槽１２
から第２の処理槽１３へ古紙原料液１１が流れるように
なっている。That is, the processing tanks 12 and 13 each having a double structure for introducing a predetermined amount of the waste paper raw material liquid 11 are connected to each other through the partition wall 14. One processing tank (hereinafter referred to as the first processing tank) 12
A raw material liquid inlet 15 for supplying the used paper raw material liquid 11 obtained in the preceding disaggregation step into the first processing tank 12 is provided on one end side of the lower part of the Is referred to as a second processing tank) 13 on the other end side of the lower part of
A raw material liquid outlet 16 is provided for taking out the waste paper raw material liquid 11 from the second processing tank 13 and supplying it to the next screening step. In addition, at the lower end of the partition wall 14, a communication port 17 that connects the first processing tank 12 side and the second processing tank 13 side.
Is formed, and the first processing tank 12 is formed through the communication port 17.
The used paper raw material liquid 11 flows from the second processing tank 13 to the second processing tank 13.
【００１６】第１の処理槽１２の他端側には、上端が第
１の処理槽１２内の古紙原料液１１の液面よりも下方に
位置し、下端が第１の処理槽１２の底板１２ａに接合さ
れて連通口１７を仕切る仕切り板１８が仕切り壁１４に
沿ってこれと平行に立設され、第１の処理槽１２に対す
る気液分離槽１９を形成している。つまり、本実施例に
おける第１の気液分離槽１９は、仕切り壁１４と、仕切
り板１８と、図１の紙面に対して垂直な方向に対向する
第１の処理槽１２の図示しない一対の側壁とで形成さ
れ、第１の処理槽１２内の古紙原料液１１は、仕切り板
１８の上端によって形成される原料液導入口２０からこ
の第１の気液分離槽１９内を流下し、その下端の連通口
１７、つまり本発明でいう原料液出口から第２の処理槽
１３内に送り出されるようになっている。On the other end side of the first processing tank 12, the upper end is located below the liquid level of the waste paper raw material liquid 11 in the first processing tank 12, and the lower end is the bottom plate of the first processing tank 12. A partition plate 18 which is joined to 12a and partitions the communication port 17 is erected in parallel with the partition wall 14 to form a gas-liquid separation tank 19 for the first processing tank 12. That is, the first gas-liquid separation tank 19 in this embodiment includes a partition wall 14, a partition plate 18, and a pair of unillustrated first processing tanks 12 facing each other in the direction perpendicular to the paper surface of FIG. The waste paper raw material liquid 11 formed by the side wall and in the first processing tank 12 flows down in the first gas-liquid separation tank 19 from the raw material liquid introduction port 20 formed by the upper end of the partition plate 18. The lower end communication port 17, that is, the raw material liquid outlet according to the present invention, is fed into the second processing tank 13.
【００１７】同様に、第２の処理槽１３の他端側には、
上端が第２の処理槽１３内の古紙原料液１１の液面より
も下方に位置し、下端が第２の処理槽１３の底板１３ａ
に接合されて原料液出口１６を仕切る仕切り板２１が第
２の処理槽１３の他端側の側壁１３ｂに沿ってこれと平
行に立設され、第２の処理槽１３に対する気液分離槽２
２を形成している。つまり、本実施例における第２の気
液分離槽２２は、第２の処理槽１３の他端側の側壁１３
ｂと、仕切り板２１と、図１の紙面に対して垂直な方向
に対向する第２の処理槽１３の図示しない一対の側壁と
で形成され、第２の処理槽１３内の古紙原料液１１は、
仕切り板２１の上端によって形成される原料液導入口２
３からこの第２の気液分離槽２２内を流下し、その下端
の原料液出口１６から取り出されて回収されるようにな
っている。Similarly, on the other end side of the second processing tank 13,
The upper end is located below the liquid level of the waste paper raw material liquid 11 in the second processing tank 13, and the lower end is the bottom plate 13a of the second processing tank 13.
A partition plate 21 that is joined to the second processing tank 13 to partition the raw material solution outlet 16 is erected in parallel with the side wall 13b on the other end side of the second processing tank 13 in parallel with the side wall 13b.
Forming 2. That is, the second gas-liquid separation tank 22 in the present embodiment is the side wall 13 on the other end side of the second processing tank 13.
b, a partition plate 21, and a pair of side walls (not shown) of the second processing tank 13 facing each other in the direction perpendicular to the paper surface of FIG. 1, and the used paper raw material liquid 11 in the second processing tank 13 is formed. Is
Raw material liquid inlet 2 formed by the upper end of the partition plate 21
3 flows down in the second gas-liquid separation tank 22, and is taken out from the raw material liquid outlet 16 at the lower end thereof and recovered.
【００１８】これら気液分離槽１９, ２２では、気液分
離槽１９, ２２内を流下する古紙原料液１１と、この古
紙原料液１１中に含まれる気泡およびインキ粒子が付着
した気泡であるフロス（以下、一括してフロスと呼称す
る）２４とを分離させ、フロス２４を原料液導入口２
０, ２３から処理槽１２, １３の上方に浮上させる必要
があるため、気液分離槽１９, ２２の長さ（図１中、原
料液導入口２０から連通口１７までの距離ならびに原料
液導入口２３から原料液出口１６までの距離）をできる
だけ長くすることが望ましいが、必要以上に長くしても
気液分離効果はある時点で平衡に達し、フローテーター
が大型化するのみで無意味となるので、一般的には処理
槽１２, １３の設計寸法に合わせて気液分離槽１９, ２
２の長さを最大限に設定すれば良い。In these gas-liquid separation tanks 19 and 22, the waste paper raw material liquid 11 flowing down in the gas-liquid separation tanks 19 and 22 and the froth which is the bubbles contained in the used paper raw material liquid 11 and the bubbles to which the ink particles adhere (Hereinafter, collectively referred to as floss) 24, and the floss 24 is connected to the raw material liquid inlet 2
Since it is necessary to float above the processing tanks 12 and 13 from 0 and 23, the length of the gas-liquid separation tanks 19 and 22 (the distance from the raw material liquid inlet 20 to the communication port 17 in FIG. It is desirable to make the distance from the mouth 23 to the raw material liquid outlet 16 as long as possible, but even if it is made longer than necessary, the gas-liquid separation effect reaches equilibrium at a certain point and only the size of the floatator becomes large, which is meaningless. Therefore, in general, the gas-liquid separation tanks 19 and 2 are designed according to the design dimensions of the processing tanks 12 and 13.
The length of 2 should be set to the maximum.
【００１９】なお、原料液導入口２０, ２３の位置は、
気液分離槽１９, ２２の液面に近すぎると、古紙原料液
１１と共にフロス２４を引き込むことになるので、余り
多量のフロス２４を吸引しないような位置に設定するこ
とが望ましい。The positions of the raw material liquid inlets 20 and 23 are
If it is too close to the liquid surface of the gas-liquid separation tanks 19 and 22, the floss 24 will be drawn together with the waste paper raw material liquid 11, so it is desirable to set the position so as not to suck an excessively large amount of floss 24.
【００２０】同上の理由から、気液分離槽１９, ２２内
を流下する古紙原料液１１の流速は、できるだけ小さい
方が望ましいが、この流速を小さくするほど気液分離槽
１９, ２２の（水平面に沿って切断した）断面積を大き
くしなければならなくなり、フローテーターが大きくな
り過ぎてしまうことから、毎秒０.005ｍ以上であること
が好ましい。逆に、その流速を速くし過ぎると、微細な
気泡の上昇速度よりも古紙原料液１１の下降速度が速く
なってしまい、フロス２４を分離できなくなるので、流
速は毎秒０.05 ｍ以下にすることが好ましい。For the same reason as above, it is desirable that the flow velocity of the used paper raw material liquid 11 flowing through the gas-liquid separation tanks 19 and 22 be as low as possible. It is preferable that the cross-section area (cut along the line) becomes large and the floatator becomes too large. On the other hand, if the flow velocity is too fast, the descent velocity of the waste paper raw material liquid 11 becomes faster than the ascending velocity of the fine bubbles, and the floss 24 cannot be separated. Therefore, the flow velocity is 0.05 m or less per second. It is preferable.
【００２１】従って、気液分離槽１９, ２２内を流下す
る古紙原料液１１の流速は、毎秒０.005〜０.05 ｍの範
囲に収めることが望ましい。フローテーター内の気泡の
大きさは直径が１mm程度のものが多く、直径が小さくな
るほど上昇速度は遅くなるが、ちなみに、一般的な古紙
原料液１１に対して直径が０.5mmの気泡の上昇速度は、
毎秒０.059ｍ程度である。Therefore, it is desirable that the flow velocity of the used paper raw material liquid 11 flowing down in the gas-liquid separation tanks 19 and 22 be in the range of 0.005 to 0.05 m / sec. Most of the bubbles in the floater have a diameter of about 1 mm, and the smaller the diameter, the slower the rising speed. By the way, the bubbles with a diameter of 0.5 mm rise with respect to general waste paper raw material liquid 11. Speed is
It is about 0.059 m / s.
【００２２】処理槽１２, １３の下部中央には、図１の
紙面に対して垂直な回転軸線回りに駆動回転する回転式
散気管２５がそれぞれ設けられている。これら回転式散
気管２５の外観を図２に示す。すなわち、本実施例にお
ける回転式散気管２５は、処理槽１２, １３の側壁を液
密に貫通し、内部が中空となって図示しないコンプレッ
サに回転継手を介して気密に接続する一対の回転軸２６
と、処理槽１２, １３内に位置する円筒ドラム２７と、
この円筒ドラム２７の外周面から放射状に突出する多数
の空気吹き出しノズル２８とを有し、図示しない駆動装
置によって図１中、矢印方向に回転しながら空気吹き出
しノズル２８から所定流量の空気が処理槽１２, １３内
に噴射されるようになっている。At the center of the lower portions of the processing tanks 12 and 13, there are provided rotary air diffusers 25 which are driven to rotate about a rotation axis perpendicular to the plane of FIG. The appearance of these rotary air diffusers 25 is shown in FIG. That is, the rotary air diffuser 25 in the present embodiment liquid-tightly penetrates the side walls of the processing tanks 12 and 13, and the inside is hollow so that the compressor (not shown) is hermetically connected via a rotary joint. 26
And a cylindrical drum 27 located in the processing tanks 12 and 13,
The cylindrical drum 27 has a large number of air blowing nozzles 28 radially protruding from the outer peripheral surface thereof, and a driving device (not shown) rotates the air blowing nozzle 28 in the direction of the arrow in FIG. It is designed to be injected into 12 and 13.
【００２３】ここで、処理槽１２, １３内に導入される
古紙原料液１１の液面レベルを一定にして脱墨処理した
場合、処理槽１２, １３に導入されている古紙原料液の
流量Ｌ（ｍ3 ／時）に対し、この古紙原料液１１に吹き
込まれて気泡を形成するための空気供給量Ｇ（Ｎｍ3 ／
時）の割合、すなわち空気供給率Ｇ／Ｌは、この値が大
きいほど（空気供給量Ｇが多く、古紙原料液量Ｌが少な
いほど）古紙原料液１１の白色度は良くなるが、この空
気供給率Ｇ／Ｌをある値以上に大きくしても、処理槽１
２, １３内に導入される古紙原料液１１の液面レベルを
調整し、一定以上のフロス率を保持すれば、その白色度
は変わらないことが実験から明らかとなった。具体的に
は、空気供給率Ｇ／Ｌを２０より大きくしても供給空気
量が多くなるだけで白色度の向上が認められない。逆
に、空気供給率Ｇ／Ｌを３未満に設定すると、古紙原料
液１１中のインキ粒子を付着させる気泡の量が少なすぎ
るため、脱墨が不充分となることから、３≦Ｇ／Ｌ≦２
０とすることが望ましい。When the deinking treatment is performed with the liquid level of the waste paper raw material liquid 11 introduced into the treatment tanks 12 and 13 being constant, the flow rate L of the waste paper raw material liquid introduced into the treatment tanks 12 and 13 is L. With respect to (m 3 / hour), the air supply amount G (Nm 3 /
The higher the value (the larger the air supply amount G and the smaller the amount L of the used paper raw material liquid), the better the whiteness of the used paper raw material liquid 11 becomes. Even if the supply rate G / L is increased above a certain value, the processing tank 1
It has been clarified from experiments that the whiteness does not change if the liquid level of the used paper raw material liquid 11 introduced into Nos. 2 and 13 is adjusted and the froth rate is maintained above a certain level. Specifically, even if the air supply rate G / L is set to be larger than 20, the whiteness is not improved without increasing the amount of supplied air. On the other hand, if the air supply rate G / L is set to less than 3, deinking will be insufficient because the amount of bubbles adhering the ink particles in the waste paper raw material liquid 11 will be too small. ≤2
It is desirable to set it to 0.
【００２４】なお、上述のフロス率は、原料液入口１
５, 連通口１７から処理槽１２, １３に供給される古紙
原料液１１の供給流量に対し、後述するフロス樋２９か
ら気泡と共に排出されるインキ粒子, 填料, 古紙繊維な
どの固形分の排出流量の割合で定義される。The above-mentioned floss rate is the same as the raw material liquid inlet 1
5. The discharge flow rate of solid wastes such as ink particles, fillers, waste paper fibers, etc., discharged from the froth gutter 29, which will be described later, with respect to the supply flow rate of the waste paper raw material liquid 11 supplied from the communication port 17 to the processing tanks 12 and 13. Is defined as the ratio of.
【００２５】また、面積供給率、すなわち空気供給量ｇ
（Ｎｍ3 ／分）を処理槽１２, １３の水平面に沿ったそ
の断面積Ａ（ｍ2 ）で除した値ｇ／Ａが、０.2より小さ
くなると、古紙原料液１１中のインキ粒子を付着させる
気泡の量が少なすぎるため、脱墨が不充分となる。逆
に、この面積供給率ｇ／Ａが２.0を越えると、処理槽１
２, １３内での気泡の突沸が生じ、脱墨処理を円滑に行
うことが困難となるため、０.2≦ｇ／Ａ≦２.0とするこ
とが望ましい。The area supply rate, that is, the air supply amount g
When the value g / A obtained by dividing (Nm 3 / min) by its cross-sectional area A (m 2 ) along the horizontal plane of the processing tanks 12 and 13 becomes smaller than 0.2, the ink particles in the waste paper raw material liquid 11 are removed. Deinking is insufficient because the amount of air bubbles attached is too small. Conversely, if the area supply rate g / A exceeds 2.0, the processing tank 1
It is desirable to set 0.2 ≦ g / A ≦ 2.0 because it is difficult to smoothly carry out the deinking process because bubbles of bubbles are generated in 2 and 13.
【００２６】また、処理槽１２, １３の上端部および仕
切り壁１４の上端には、古紙原料液１１の液面に浮き上
がるフロス２４を処理槽１２, １３の外部に排出するた
めのフロス樋２９がそれぞれ設けられており、処理槽１
２, １３に導入された古紙原料液１１の液面からフロス
樋２９を乗り越えて溢流するフロス２４がフロス樋２９
を伝わって処理槽１２, １３外に排出されるようになっ
ている。A floss gutter 29 for discharging the floss 24 floating on the liquid surface of the waste paper raw material liquid 11 to the outside of the processing tanks 12 and 13 is provided at the upper ends of the processing tanks 12 and 13 and the partition wall 14. Each is provided with processing tank 1
The floss gutter 29 is a floss gutter 29 that overflows from the liquid surface of the waste paper raw material liquid 11 introduced in the Nos. 2 and 13 over the floss gutter 29.
And is discharged to the outside of the processing tanks 12 and 13.
【００２７】なお、本実施例では各処理槽１２, １３の
回転式散気管２５の上部にフロス２４の流れが偏らない
ように整流するための整流板３０を設けている。In this embodiment, a rectifying plate 30 for rectifying the flow of the floss 24 so that the flow of the floss 24 is not biased is provided above the rotary diffusing tubes 25 of the processing tanks 12 and 13.
【００２８】従って、原料液入口１５から第１の処理槽
１２内に供給される古紙原料液１１は、回転式散気管２
５の空気吹き出しノズル２８から吹き出される空気と攪
拌され、古紙原料液１１中を上昇する気泡の表面にこの
古紙原料液１１中に含まれるインキ粒子が付着してフロ
ス２４となり、古紙原料液１１の液面に浮上してフロス
樋２９へ溢流し、このフロス樋２９により排出される。Therefore, the waste paper raw material liquid 11 supplied from the raw material liquid inlet 15 into the first processing tank 12 is supplied to the rotary air diffuser 2
The ink particles contained in the waste paper raw material liquid 11 are adhered to the surface of the bubbles rising in the waste paper raw material liquid 11 by being agitated with the air blown from the air blowing nozzle 28 of No. Floats on the liquid surface of the above and overflows to the floss gutter 29, and is discharged by this floss gutter 29.
【００２９】第１の処理槽１２内にてインキ粒子が除去
された古紙原料液１１は、この第１の処理槽１２の上部
に開口する原料液導入口２０から第１の気液分離槽１９
を流下し、連通口１７から第２の処理槽１３内に供給さ
れる。この場合、古紙原料液１１が第１の気液分離槽１
９内を流下する間に、この古紙原料液１１中に含まれる
フロス２４が原料液導入口２０から第１の処理槽１２側
に排出されるため、第２の処理槽１３側に供給される古
紙原料液１１中に含まれるフロス２４は極めて少量とな
り、古紙原料液１１から効率良くフロス２４を除去する
ことができる。The used paper raw material liquid 11 from which the ink particles have been removed in the first processing tank 12 is supplied from the raw material liquid inlet port 20 opened at the upper portion of the first processing tank 12 to the first gas-liquid separation tank 19.
And is supplied to the second processing tank 13 through the communication port 17. In this case, the used paper raw material liquid 11 is the first gas-liquid separation tank 1
While flowing down through the inside 9, the floss 24 contained in the waste paper raw material liquid 11 is discharged from the raw material liquid inlet 20 to the first processing tank 12 side, and thus is supplied to the second processing tank 13 side. The floss 24 contained in the waste paper raw material liquid 11 becomes extremely small, and the floss 24 can be efficiently removed from the waste paper raw material liquid 11.
【００３０】この古紙脱墨処理は、第２の処理槽１３で
も同様にして行われ、このようにしてインキ粒子が除去
された古紙原料液１１は、第２の処理槽１３の上部に開
口する原料液導入口２３から第２の気液分離槽２２を流
下し、原料液出口１６から取り出されて回収される。こ
の場合、古紙原料液１１が第２の気液分離槽２２内を流
下する間に、この古紙原料液１１中に含まれるフロス２
４が原料液導入口２３から第２の処理槽１３側に排出さ
れるため、回収される古紙原料液１１中に含まれるフロ
ス２４は極めて少量となる。This used paper deinking process is similarly performed in the second processing tank 13, and the used paper raw material liquid 11 from which the ink particles have been removed in this way opens to the upper part of the second processing tank 13. It flows down the second gas-liquid separation tank 22 from the raw material liquid inlet 23, is taken out from the raw material liquid outlet 16, and is recovered. In this case, while the used paper raw material liquid 11 flows down in the second gas-liquid separation tank 22, the floss 2 contained in the used paper raw material liquid 11
Since 4 is discharged from the raw material liquid inlet 23 to the second processing tank 13 side, the amount of floss 24 contained in the recovered waste paper raw material liquid 11 is extremely small.
【００３１】具体的に、底板１２ａ, １３ａの寸法が10
00×1000mm、これら底板１２ａ, １３ａからフロス桶２
９の上端までの高さが2000mm、第１の処理槽１２の仕切
り壁１４と仕切り板１８との間隔、および第２の処理槽
１３の他端側の側壁１３ｂと仕切り板２１との間隔がそ
れぞれ100 mmに設定された図１に示す如きフローテータ
ーを用い、毎時１２ｍ3 の割合で古紙原料液１１を供給
したところ、回収される古紙原料液１１の白色度は、原
料液入口１５から供給される古紙原料液１１の白色度よ
りも１３ポイント向上していた。Specifically, the dimensions of the bottom plates 12a and 13a are 10
00 x 1000 mm, from these bottom plates 12a, 13a to the floss tub 2
The height to the upper end of 9 is 2000 mm, the distance between the partition wall 14 and the partition plate 18 of the first processing tank 12 and the distance between the side wall 13b on the other end side of the second processing tank 13 and the partition plate 21 are When the waste paper raw material liquid 11 was supplied at a rate of 12 m 3 per hour using the floater as shown in FIG. 1 set to 100 mm, the whiteness of the recovered waste paper raw material liquid 11 was supplied from the raw material liquid inlet 15. It was 13 points higher than the whiteness of the used paper raw material liquid 11.
【００３２】なお、このときの古紙原料液１１の断面積
負荷は６ｍ3/Ｈ・ｍ2 であり、Ｇ／Ｌは４, ６, ８の３
種類で処理してその平均値を求めた。The cross-sectional area load of the used paper raw material liquid 11 at this time is 6 m 3 / H · m 2 , and G / L is 4, 6, 8 3
It processed by the kind and calculated | required the average value.
【００３３】これに対し、気液分離槽１９, ２２を構成
する仕切り板１８, ２１がない図３に示す如き従来のフ
ローテーターを用い、同一条件で脱墨処理を行ったとこ
ろ、回収される古紙原料液１１の白色度は、原料液入口
１５から供給される古紙原料液１１の白色度に対して１
１ポイントしか向上させることができず、本発明による
気液分離槽１９, ２２が古紙原料液１１の脱墨処理に有
効であることを確認することができた。On the other hand, a conventional floater as shown in FIG. 3 which does not have the partition plates 18 and 21 constituting the gas-liquid separation tanks 19 and 22 is used to perform deinking treatment under the same conditions and is recovered. The whiteness of the waste paper raw material liquid 11 is 1 with respect to the whiteness of the waste paper raw material liquid 11 supplied from the raw material liquid inlet 15.
Only one point could be improved, and it was confirmed that the gas-liquid separation tanks 19 and 22 according to the present invention are effective for the deinking treatment of the used paper raw material liquid 11.
【００３４】なお、本実施例では、仕切り板１８, ２１
を処理槽１２, １３内に設けたが、処理槽１２, １３に
対して独立した気液分離槽を各処理槽１２, １３に連結
するようにしても良い。また、上述した実施例では、２
連構造のフローテーターについて説明したが、さらに多
くの処理槽と気液分離槽とを交互に直列に連結すること
によって、回収される古紙原料液１１の白色度を向上さ
せることができる。In this embodiment, the partition plates 18 and 21 are
Although the above is provided in the processing tanks 12 and 13, a gas-liquid separation tank independent of the processing tanks 12 and 13 may be connected to each of the processing tanks 12 and 13. Further, in the above-described embodiment, 2
Although the floatator having the continuous structure has been described, the whiteness of the recovered waste paper material liquid 11 can be improved by alternately connecting more processing tanks and gas-liquid separation tanks in series.
【００３５】[0035]
【発明の効果】本発明によると、処理槽に導入された古
紙原料液を気液分離槽の原料液導入口から下部の原料液
出口に向けて流下させ、この間に古紙原料液中に混在す
るフロスを上方に浮き上がらせるようにしたので、原料
液出口から回収される古紙原料液に混在するフロスや気
泡を従来のものよりも著しく少なくすることができる。
この結果、処理槽の数を少なくしても脱墨処理を効率良
く行うことができ、設備コストを下げることができる
上、後に続く精選処理を短時間で済ませることができ、
再生紙の製造コストを低減させることが可能である。According to the present invention, the waste paper raw material liquid introduced into the processing tank is allowed to flow down from the raw material liquid inlet of the gas-liquid separation tank toward the lower raw material liquid outlet, during which it is mixed in the waste paper raw material liquid. Since the floss is floated upward, it is possible to significantly reduce the amount of floss and bubbles mixed in the used paper raw material liquid recovered from the raw material liquid outlet as compared with the conventional one.
As a result, the deinking process can be efficiently performed even if the number of processing tanks is reduced, the facility cost can be reduced, and the subsequent selective process can be completed in a short time.
It is possible to reduce the manufacturing cost of recycled paper.
【００３６】また、気液分離槽内を流下する古紙原料液
の流速を毎秒０.005〜０.05 ｍの範囲に設定した場合に
は、古紙原料液に対してこの古紙原料液中に含まれる気
泡を最も効率良く分離させることができる。When the flow rate of the used paper raw material liquid flowing down in the gas-liquid separation tank is set in the range of 0.005 to 0.05 m / sec, the used paper raw material liquid is contained in the used paper raw material liquid. The bubbles can be separated most efficiently.
【００３７】さらに、古紙原料液量に対する処理槽に吹
き込まれて気泡を形成するための空気供給量の割合と、
処理槽の水平面に沿った断面積に対する単位時間当たり
の空気供給量の割合とがそれぞれ所定範囲に収めた場合
には、エネルギー消費を最小限に抑えた連続的な操業を
円滑に行うことができる。Furthermore, the ratio of the amount of air supplied for forming bubbles by being blown into the processing tank with respect to the amount of waste paper raw material liquid,
When the ratio of the air supply amount per unit time to the cross-sectional area along the horizontal plane of the treatment tank is within the predetermined range, the continuous operation with the minimum energy consumption can be smoothly performed. .
【図１】本発明による古紙脱墨処理方法を実現し得る本
発明によるフローテーターの一実施例の概略構造を表す
断面図である。FIG. 1 is a cross-sectional view showing a schematic structure of an embodiment of a floatator according to the present invention capable of realizing a used paper deinking treatment method according to the present invention.
【図２】図１に示したフローテーターに組み込まれる回
転式散気管の外観を表す斜視図である。FIG. 2 is a perspective view showing an appearance of a rotary air diffusing tube incorporated in the floatator shown in FIG.
【図３】従来のフローテーターの一例の概略構造を表す
断面図である。FIG. 3 is a cross-sectional view showing a schematic structure of an example of a conventional floatator.
１１ 古紙原料液 １２, １３ 処理槽 １２ａ, １３ａ 底板 １３ｂ 側壁 １４ 仕切り壁 １５ 原料液入口 １６ 原料液出口 １７ 連通口 １８, ２１ 仕切り板 １９, ２２ 気液分離槽 ２０, ２３ 原料液導入口 ２４ フロス ２５ 回転式散気管 ２６ 回転軸 ２７ 円筒ドラム ２８ 空気吹き出しノズル ２９ フロス樋 ３０ 整流板 １０１, １０２ 処理槽 １０３ 空気吹き出しノズル １０４ 回転式散気管 １０５ 原料液入口 １０６ 原料液出口 １０７ 仕切り壁 １０８ 連通口 １０９ 古紙原料液 １１０ フロス １１１ フロス樋 11 Waste paper raw material liquid 12, 13 treatment tank 12a, 13a bottom plate 13b side wall 14 partition walls 15 Raw material liquid inlet 16 Raw material liquid outlet 17 communication port 18, 21 dividers 19, 22 Gas-liquid separation tank 20, 23 Raw material liquid inlet 24 floss 25 rotating air diffuser 26 rotation axis 27 Cylindrical drum 28 Air blowing nozzle 29 Floss Gutter 30 current plate 101, 102 treatment tanks 103 Air blowing nozzle 104 rotary air diffuser 105 Raw material liquid inlet 106 Raw material liquid outlet 107 partition wall 108 Communication port 109 Waste paper raw material liquid 110 floss 111 floss gutter
───────────────────────────────────────────────────── フロントページの続き (72)発明者 日置 敦 愛知県春日井市王子町１番地 王子工営 株式会社 名古屋事業部内 (72)発明者 佐藤 純一郎 愛知県春日井市王子町１番地 王子工営 株式会社 名古屋事業部内 (56)参考文献 特開 平４−361679（ＪＰ，Ａ) 特開 平５−71087（ＪＰ，Ａ) 特公 平６−60473（ＪＰ，Ｂ２) 特公 昭44−3486（ＪＰ，Ｂ１) 特公 昭40−122（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) D21C 5/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Hioki 1 Ojimachi, Kasugai City, Aichi Prefecture Oji Koei Co., Ltd., Nagoya Business Department (72) Inventor Junichiro Sato 1 Ojimachi, Kasugai City, Aichi Oji Koei Co., Ltd. (56) References JP-A-4-361679 (JP, A) JP-A-5-71087 (JP, A) JP-B 6-60473 (JP, B2) JP-B-44-3486 (JP, B1) Japanese Patent Publication No. 40-122 (JP, B1) (58) Fields investigated (Int.Cl. 7 , DB name) D21C 5/02
Claims (9)
気泡を吹き込み、この気泡の表面に前記古紙原料液中に
介在するインキ粒子を付着させ、当該気泡を前記処理槽
の上部から溢流させ、前記古紙原料液から前記インキ粒
子を除去するようにした古紙脱墨処理方法であって、 前記古紙原料液を前記処理槽の下部に供給するステップ
と、 前記処理槽の上部から前記古紙原料液を気液分離槽に導
入するステップと、 前記気液分離槽に導入された前記古紙原料液中の気泡の
未分離分を前記処理槽の上部に浮上させて排出するステ
ップと、 気泡が除去された前記古紙原料液を前記気液分離槽の下
端部から取り出すステップとを具えたことを特徴とする
古紙脱墨処理方法。1. A bubble is blown from a lower part of a treatment tank for introducing a used paper raw material liquid, ink particles present in the used paper raw material liquid are adhered to the surface of the bubble, and the bubble overflows from the upper part of the treatment tank. A method for deinking used paper that is configured to remove the ink particles from the used paper raw material liquid, wherein the step of supplying the used paper raw material liquid to the lower portion of the processing tank, and the used paper raw material from the upper portion of the processing tank. The step of introducing the liquid into the gas-liquid separation tank, the step of floating the unseparated portion of the bubbles in the waste paper raw material liquid introduced into the gas-liquid separation tank to the upper part of the processing tank and discharging, and the removal of the bubbles And a step of taking out the recovered waste paper raw material liquid from the lower end of the gas-liquid separation tank.
槽とが交互に直列に連結されていることを特徴とする請
求項１に記載の古紙脱墨処理方法。2. The used paper deinking method according to claim 1, wherein the plurality of processing tanks and the plurality of gas-liquid separation tanks are alternately connected in series.
料液の流速は、毎秒０.005〜０.05 ｍの範囲にあること
を特徴とする請求項１または請求項２に記載の古紙脱墨
処理方法。3. The flow rate of the used paper raw material liquid flowing down in the gas-liquid separation tank is in the range of 0.005 to 0.05 m / sec, according to claim 1 or 2. Used paper deinking method.
に内部に空気が圧送される円筒状のドラムと、このドラ
ムの外周面に放射状に突設されて前記処理槽内の前記古
紙原料液中に気泡を噴出させる複数の空気吹き出しノズ
ルとを有する回転散気管を用い、前記処理槽の下部から
気泡を吹き込むようにしたことを特徴とする請求項１か
ら請求項３の何れかに記載の古紙脱墨処理方法。4. A cylindrical drum, which is rotationally driven in the lower part of the processing tank and in which air is pressure-fed, and a waste paper raw material liquid in the processing tank, which is radially projected on an outer peripheral surface of the drum. 4. A rotary air diffuser having a plurality of air blowing nozzles for ejecting bubbles therein is used to blow bubbles from the lower portion of the processing tank. Used paper deinking method.
るための空気供給量をＧ（Ｎｍ3 ／時）、またはｇ（Ｎ
ｍ3 ／分）、前記古紙原料液の流量をＬ（ｍ3 ／時）、
前記処理槽の水平面に沿った断面積をＡ（ｍ2 ）とした
場合、 ３≦Ｇ／Ｌ≦２０かつ ０. ２≦ｇ／Ａ≦２. ０ を満足することを特徴とする請求項１から請求項４の何
れかに記載の古紙脱墨処理方法。5. An air supply amount for forming bubbles by being blown into the treatment tank is G (Nm 3 / hour) or g (N
m 3 / min), the flow rate of the waste paper raw material liquid is L (m 3 / hour),
2. When the cross-sectional area along the horizontal plane of the treatment tank is A (m 2 ), 3 ≦ G / L ≦ 20 and 0.2 ≦ g / A ≦ 2.0 are satisfied. 5. The used paper deinking method according to claim 4.
気泡供給手段によって気泡を吹き込み、この気泡の表面
に前記古紙原料液中に介在するインキ粒子を付着させ、
当該気泡を前記処理槽の上部から溢流させ、前記古紙原
料液中から前記インキ粒子を除去するようにしたフロー
テーターであって、 前記処理槽の下部に設けられて前記古紙原料液を処理槽
内に供給するための原料液入口と、 前記処理槽内の前記古紙原料液を導入するための原料液
導入口を上端部に有し、下端部に前記古紙原料液を取り
出すための原料液出口が設けられた気液分離槽と を具えたことを特徴とするフローテーター。6. Bubbles are blown from a lower part of a processing tank for introducing the used paper raw material liquid by a bubble supply means, and ink particles present in the used paper raw material liquid are adhered to the surface of the bubbles,
A floatator for allowing the bubbles to overflow from the upper part of the processing tank to remove the ink particles from the waste paper raw material liquid, the waste paper raw material liquid being provided in the lower portion of the processing tank. A raw material liquid inlet for supplying the inside of the processing tank, and a raw material liquid inlet for introducing the used paper raw material liquid in the treatment tank at the upper end portion, and a raw material liquid outlet for taking out the used paper raw material liquid at the lower end portion And a gas-liquid separation tank provided with a floater.
古紙原料液の液面よりも低い位置から前記処理槽の底面
に至る１枚の仕切り板によって仕切られて構成され、こ
の仕切り板の上端によって形成される開口部から前記処
理槽内の前記古紙原料液が前記気液分離槽内に導入され
るものであることを特徴とする請求項６に記載のフロー
テーター。7. The gas-liquid separation tank is constituted by a partition plate extending from a position lower than the liquid level of the used paper raw material liquid in the processing tank to the bottom surface of the processing tank. The floatator according to claim 6, wherein the used paper raw material liquid in the processing tank is introduced into the gas-liquid separation tank through an opening formed by the upper end of the plate.
槽とが交互に直列に連結されていることを特徴とする請
求項６または請求項７に記載のフローテーター。8. The floatator according to claim 6, wherein a plurality of the treatment tanks and a plurality of the gas-liquid separation tanks are alternately connected in series.
転自在に設置されて回転駆動されると共に内部に空気が
圧送される円筒状のドラムと、このドラムの外周面に放
射状に突設されて前記処理槽内の前記古紙原料液中に気
泡を噴出させる複数の空気吹き出しノズルとを有する回
転散気管であることを特徴とする請求項６から請求項８
の何れかに記載のフローテーター。9. The bubble supply means is rotatably installed in a lower portion of a processing tank, is rotationally driven, and has a cylindrical drum into which air is pressure-fed, and radially protrudes from an outer peripheral surface of the drum. 7. A rotary air diffuser having a plurality of air blowing nozzles for ejecting bubbles into the waste paper raw material liquid in the processing tank.
The floatator according to any one of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00135598A JP3426128B2 (en) | 1998-01-07 | 1998-01-07 | Wastepaper deinking treatment method and floatator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00135598A JP3426128B2 (en) | 1998-01-07 | 1998-01-07 | Wastepaper deinking treatment method and floatator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11200270A JPH11200270A (en) | 1999-07-27 |
| JP3426128B2 true JP3426128B2 (en) | 2003-07-14 |
Family
ID=11499196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00135598A Expired - Fee Related JP3426128B2 (en) | 1998-01-07 | 1998-01-07 | Wastepaper deinking treatment method and floatator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426128B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4551012B2 (en) * | 2001-03-16 | 2010-09-22 | 王子エンジニアリング株式会社 | Floatator |
| JP4522009B2 (en) * | 2001-03-16 | 2010-08-11 | 王子エンジニアリング株式会社 | Air diffuser and floatator using the same |
| JP5114723B2 (en) * | 2006-07-14 | 2013-01-09 | 王子ホールディングス株式会社 | Flotator and waste paper deinking method |
| JP4538479B2 (en) * | 2007-09-04 | 2010-09-08 | 日本製紙株式会社 | Floatator |
| JP4866814B2 (en) * | 2007-09-04 | 2012-02-01 | 相川鉄工株式会社 | Floatator |
| JP5166952B2 (en) * | 2008-04-15 | 2013-03-21 | 和雄 高橋 | Externally heated vacuum fryer |
-
1998
- 1998-01-07 JP JP00135598A patent/JP3426128B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11200270A (en) | 1999-07-27 |
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