JP2005305206A

JP2005305206A - Waste liquid regeneration apparatus of printer

Info

Publication number: JP2005305206A
Application number: JP2004121500A
Authority: JP
Inventors: Masayuki Eda; 昌之江田; Hitoshi Isono; 仁磯野; Junichi Iifushi; 順一飯伏; Minoru Sueda; 穣末田; Katsuaki Makino; 勝昭槇野
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2004-04-16
Filing date: 2004-04-16
Publication date: 2005-11-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste liquid regeneration apparatus with reduced manufacturing cost by proposing a simplified apparatus. <P>SOLUTION: A waste liquid regeneration tank 1 is formed into a two-tank type of first and second treatment tanks 2 and 3, and positive electrodes 6 and 13 consisting of mesh plates are provided in the respective treatment tanks 2 and 3. The first treatment tank 2 is provided with water 7 as a negative electrode 5 on its bottom, and the second treatment tank 3 is provided with a negative electrode 15 on its bottom. A supply part 11 for supplying washing liquid containing residual ink pigment separated in the first treatment tank 2 to the second treatment tank 3 is provided so as to separate the residual ink pigment from the washing liquid in the second treatment tank 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、印刷機のブランケット胴等のインキが付着する印刷機の構成部品の洗浄時に排出される廃液を再生処理する装置に関し、特に、帯電したインキ顔料、絶縁性の洗浄液、及び導電性の水の３成分が混在した処理槽において、単一の装置でそれらの３成分を分離する廃液再生装置に関する。 The present invention relates to an apparatus for reclaiming waste liquid discharged during cleaning of printing press components such as a blanket cylinder of a printing press, and in particular, charged ink pigment, insulating cleaning liquid, and conductive The present invention relates to a waste liquid regenerating apparatus for separating three components with a single device in a treatment tank in which three components of water are mixed.

印刷機のブランケット胴や圧胴の洗浄は、石油系の洗浄液を使用するため廃液が出る。従来、廃液は廃棄されていたが、近年では、廃液を再処理して洗浄液の再利用が試みられている。
廃液の再生方法としては、種々の方式が提案されているが、高効率で再生を行えることから、インキ顔料、水、洗浄液の３成分を含んだ廃液中に静電界を発生させ、インキ顔料を廃液中で電気泳動させるとともに、水を静電凝集させて、インキ顔料、水、洗浄液を分離する静電界利用方式が注目されている。
本出願人は、本発明の提案に先立ち、特開２０００−７９２５９号公報（特許文献１）により、静電界利用方式を利用した実用性の高い廃液再生装置について提案している。 Cleaning the blanket cylinder and impression cylinder of a printing press uses a petroleum-based cleaning liquid, resulting in waste liquid. Conventionally, the waste liquid has been discarded, but in recent years, an attempt has been made to reuse the cleaning liquid by reprocessing the waste liquid.
Various methods have been proposed for recycling the waste liquid, but since it can be regenerated with high efficiency, an electrostatic field is generated in the waste liquid containing the three components of the ink pigment, water, and cleaning liquid, and the ink pigment is removed. Attention has been focused on a method of using an electrostatic field in which electrophoresis is carried out in a waste liquid and water is electrostatically aggregated to separate an ink pigment, water and a cleaning liquid.
Prior to the proposal of the present invention, the present applicant has proposed a highly practical waste liquid recycling apparatus using an electrostatic field utilization method according to Japanese Unexamined Patent Publication No. 2000-79259 (Patent Document 1).

特許文献１の静電界利用方式を利用した廃液再生方法の原理を図７に示している。
廃液再生装置５１の容器処理槽内には、仕切り板５２が上下方向に配設され、仕切り板５２と処理槽の一方側の縦壁５３との間の上部には、廃液５５の供給口５６が設けられている。仕切り板５２の下方は、処理槽の底部との間に隙間を形成し、仕切り板５２と他方の縦壁５４との間には、水平方向に電極板５７が設置され、アース電極５８として水５９を使用している。
処理槽に供給された廃液５５中には、水５９、インキ顔料６０、石油系の洗浄液６１が混在している。電極板５７に高電圧を印加させて、電極板５７を＋極とし、水５９を−極として、電極板５７及び水５９間に電界が発生するようにしている。こうして廃液５５中のインキ顔料６０の電気泳動と、水５９の静電凝集が始まり、水５９は大粒の粒径の凝集水６２に凝集し、インキ顔料６０はそれぞれ別々に移動し分離してゆく。 The principle of the waste liquid recycling method using the electrostatic field utilization method of Patent Document 1 is shown in FIG.
A partition plate 52 is arranged in the vertical direction in the container treatment tank of the waste liquid regenerating apparatus 51, and a supply port 56 for the waste liquid 55 is disposed above the partition plate 52 and the vertical wall 53 on one side of the treatment tank. Is provided. Below the partition plate 52, a gap is formed between the bottom of the treatment tank and an electrode plate 57 is installed in the horizontal direction between the partition plate 52 and the other vertical wall 54. 59 is used.
In the waste liquid 55 supplied to the treatment tank, water 59, an ink pigment 60, and a petroleum-based cleaning liquid 61 are mixed. A high voltage is applied to the electrode plate 57 so that the electrode plate 57 is a positive electrode and the water 59 is a negative electrode so that an electric field is generated between the electrode plate 57 and the water 59. Thus, electrophoresis of the ink pigment 60 in the waste liquid 55 and electrostatic aggregation of the water 59 start, the water 59 aggregates into the aggregated water 62 having a large particle diameter, and the ink pigment 60 moves and separates separately. .

電界を発生させている状態を長く続けることにより、電界中での反応が進み、水５９，６２とインキ顔料６０とが完全に分離し、水５９，６２は一群に凝集して、重力により処理槽の底部に沈降する。また、＋電荷のインキ顔料６０は、−極であるアース電極（水層５９）の表面（上面）に付着する。これにより、水５９，６２とインキ顔料６０が除去された洗浄液６１（即ち、洗浄再生液）が得られる。なお、符号６３は、処理槽に残る汚れた洗浄液及び再生された洗浄液（溶剤）の表面位置、６４は洗浄液の流通経路図例を示している。ＬＤはプラス電極板５７と水５９の電極間の距離である。 By continuing the state in which the electric field is generated for a long time, the reaction in the electric field proceeds, the water 59, 62 and the ink pigment 60 are completely separated, and the water 59, 62 aggregates into a group and is treated by gravity. Settling to the bottom of the tank. Further, the positively charged ink pigment 60 adheres to the surface (upper surface) of the ground electrode (water layer 59) which is the negative electrode. As a result, a cleaning liquid 61 (that is, a cleaning regeneration liquid) from which the water 59, 62 and the ink pigment 60 have been removed is obtained. Reference numeral 63 denotes a surface position of the dirty cleaning liquid remaining in the processing tank and the regenerated cleaning liquid (solvent), and 64 denotes an example of a flow path of the cleaning liquid. LD is the distance between the positive electrode plate 57 and the water 59 electrode.

このような、インキ顔料、水、洗浄液の３成分を含んだ廃液中に静電界を発生させ、インキ顔料を廃液中で電気泳動させるとともに、水を静電凝集させて、インキ顔料、水、洗浄液を分離する静電界利用方式は、特許文献１以外に、発明者らにより特開２００２−２９２８３４号公報（特許文献２）が開示されている。 Such an ink pigment, water, and washing liquid are used to generate an electrostatic field in the waste liquid, and the ink pigment is electrophoresed in the waste liquid and the water is electrostatically agglomerated to produce the ink pigment, water, and washing liquid. In addition to Patent Document 1, JP-A-2002-292834 (Patent Document 2) is disclosed by the inventors in addition to Patent Document 1.

特開２０００−７９２５９号公報JP 2000-79259 A 特開２００２−２９２８３４号公報JP 2002-292934 A

しかしながら、本発明者らが提案している印刷機械の洗浄廃液再生方法には、静電界利用法及びこの方式を用いた装置構成については提案しているが、メッシュ方式の電極板を使用する場合の印加電圧とアース電極の関係について、具体的な追求がなされておらず、廃液再生装置についても実現化のため、充分な性能を発揮させかつコストを軽減する必要が生じている。
本発明は、このような事情に鑑みてなされたものであって、電極板を使用した場合の印加電圧とアース電極の関係（廃液流量と電界強度の関係）を具体的な数値で明確化し、高性能な印刷機械の洗浄廃液再生方法を提案する。また、特許文献１、２で提案した印刷機械の洗浄廃液再生方法及び装置は、複雑な構成となり、製作コストが比較的高くなる欠点がある。そのため簡易型の装置構成を提案し、製作コストの低減が図れる廃液再生装置を提供するものである。 However, the cleaning waste liquid recycling method for the printing machine proposed by the present inventors has proposed an electrostatic field utilization method and an apparatus configuration using this method, but a mesh method electrode plate is used. No specific pursuit has been made regarding the relationship between the applied voltage and the ground electrode, and it is necessary to exhibit sufficient performance and reduce costs in order to realize a waste liquid regenerating apparatus.
The present invention was made in view of such circumstances, and the relationship between the applied voltage and the ground electrode when using the electrode plate (the relationship between the waste liquid flow rate and the electric field strength) is clarified with specific numerical values. A high-performance printing machine cleaning waste liquid recycling method is proposed. In addition, the cleaning waste liquid recycling method and apparatus proposed in Patent Documents 1 and 2 have a complicated configuration and have a drawback of relatively high production costs. Therefore, a simple apparatus configuration is proposed, and a waste liquid regenerating apparatus capable of reducing the manufacturing cost is provided.

上記課題を解決するために、本発明は、廃液再生処理槽内にプラス電極を上側にマイナス電極を下側にして配置し、印刷機で使用したインキ顔料、水、洗浄液を含んだ廃液を前記廃液再生処理槽内に入れ、前記電極間に電圧を印加させて前記廃液を静電界処理し、前記インキ顔料をマイナス電極に誘導し、凝集した水が前記廃液処理槽内の底部に沈降し、該水より比重の軽い洗浄液を上澄み液として、前記廃液から洗浄液を再生する印刷機の廃液再生装置において、前記廃液再生処理槽を２槽式として、第１の処理槽と第２の処理槽により構成し、前記第１の処理槽のマイナス電極を該第１の処理槽の底部の水とし、前記第２の処理槽のマイナス電極を該第２の処理槽の底部に設け、前記第１の処理槽で分離した洗浄液を第２の処理槽に供給し、該洗浄液に混在している残存インキ顔料及び水を前記第２の処理槽でさらに分離するようにした。
上記発明は、前記第１の処理槽及び第２の処理槽のプラス電極がともに、洗浄液を通すメッシュ板とすることができる。
また、上記発明は、前記第２の処理槽のプラス電極及びマイナス電極間の電界強度が、前記第１の処理槽のプラス電極及びマイナス電極の電解強度よりも大きくするとよい。
上記発明は、前記第１の処理槽の電極の電界強度を、０．０７ｋＶ／ｍｍ以上とすることができ、前記第２の処理槽の電極の電界強度を０．０５ｋＶ／ｍｍ以上とすることができる。なお、電界強度の最大値は放電が生じる前の電圧である。
上記発明は、前記第１の処理槽及び第２の処理槽のプラス電極を１つの電源により電圧を供給することができる。
さらに、上記発明は、前記第１の処理槽及び第２の処理槽の電極に電圧を印加する高圧電源装置、前記第１の処理槽に供給する廃液を溜める廃液供給装置、廃液を廃液供給装置から前記第１の処理槽に圧送する送液ポンプ、前記第２の処理槽から洗浄液を回収する再生液回収装置、前記第１の処理槽の水が排水される水排水装置、前記第１の処理槽と廃液供給装置との間に設けられ第１の処理槽から導入されたインキ顔料をろ過するろ過装置及びこれらの装置を操作する制御装置を設けることができ、前記第１の処理槽、前記第２の処理槽、前記高圧電源装置、前記廃液供給装置、前記送液ポンプ、前記再生液回収装置、前記水排水装置、前記ろ過装置及び前記制御装置一式を一つに組込むことができる。 In order to solve the above-mentioned problems, the present invention arranges a waste liquid containing an ink pigment, water, and a cleaning liquid used in a printing machine by placing a plus electrode on the upper side and a minus electrode on the lower side in a waste liquid recycling treatment tank. Place in a waste liquid regeneration treatment tank, apply a voltage between the electrodes to treat the waste liquid with an electrostatic field, induce the ink pigment to the negative electrode, and agglomerated water settles at the bottom of the waste liquid treatment tank, In a waste liquid regenerating apparatus for a printing press that regenerates a cleaning liquid from the waste liquid using a cleaning liquid having a specific gravity lighter than that of the water, the waste liquid regeneration processing tank is composed of two tanks, and includes a first processing tank and a second processing tank. The negative electrode of the first treatment tank is water at the bottom of the first treatment tank, the negative electrode of the second treatment tank is provided at the bottom of the second treatment tank, Supply the cleaning liquid separated in the treatment tank to the second treatment tank Was remaining ink pigment and water are mixed in the cleaning liquid to be further separated in the second treatment tank.
In the above invention, both the positive electrodes of the first treatment tank and the second treatment tank can be a mesh plate through which a cleaning liquid is passed.
In the invention described above, the electric field strength between the positive electrode and the negative electrode of the second processing tank is preferably larger than the electrolytic strength of the positive electrode and the negative electrode of the first processing tank.
In the above invention, the electric field strength of the electrode of the first processing tank can be 0.07 kV / mm or more, and the electric field strength of the electrode of the second processing tank can be 0.05 kV / mm or more. Can do. The maximum value of the electric field strength is a voltage before discharge occurs.
The said invention can supply a voltage to the positive electrode of a said 1st processing tank and a 2nd processing tank by one power supply.
Further, the present invention provides a high-voltage power supply device that applies a voltage to the electrodes of the first treatment tank and the second treatment tank, a waste liquid supply device that accumulates waste liquid to be supplied to the first treatment tank, and a waste liquid supply device. A liquid feed pump for pumping from the first treatment tank to the first treatment tank, a reclaimed liquid recovery device for collecting the cleaning liquid from the second treatment tank, a water drainage device for draining water from the first treatment tank, and the first A filtration device for filtering the ink pigment provided between the treatment tank and the waste liquid supply device and introduced from the first treatment tank, and a control device for operating these devices can be provided, the first treatment tank, The second treatment tank, the high-voltage power supply device, the waste liquid supply device, the liquid feed pump, the regenerated liquid recovery device, the water drainage device, the filtration device, and the control device set can be integrated into one.

本発明の請求項１は、簡易な装置構成のため容易に装置製作が可能となり、製作コストが大幅に削減でき、純度の高い洗浄液を得ることができる。
本発明の請求項２は、前記第１の処理槽及び第２の処理槽のプラス電極がともに、洗浄液を通すメッシュ板であるので、上澄みの洗浄液を容易に通すことができる。
本発明の請求項３は、前記第２の処理槽のプラス電極及びマイナス電極間の電界強度が、前記第１の処理槽のプラス電極及びマイナス電極の電解強度よりも大きくしたので、第２の処理槽で残存するインキ顔料及び微量の水を分離することができる。
本発明の請求項４は、前記第１の処理槽の電極の電界強度を、０．０７ｋＶ／ｍｍ以上としたことにより、洗浄液の分離を効率良くすることができる。同様に、本発明の請求項５は、前記第２の処理槽の電極の電界強度を０．０５ｋＶ／ｍｍ以上としたことにより、洗浄液の分離を効率良くすることができる。
本発明の請求項６は、前記第１の処理槽及び第２の処理槽のプラス電極を１つの電源により電圧を供給することにより、装置の小型化を図ることができる。
本発明の請求項７は、前記第１の処理槽及び第２の処理槽の電極に電圧を印加する高圧電源装置、前記第１の処理槽に供給する廃液を溜める廃液供給装置、廃液を廃液供給装置から前記第１の処理槽に圧送する送液ポンプ、前記第２の処理槽から洗浄液を回収する再生液回収装置、前記第１の処理槽の水が排水される水排水装置、前記第１の処理槽と廃液供給装置との間に設けられ第１の処理槽から導入されたインキ顔料をろ過するろ過装置及びこれらの装置を操作する制御装置を設けることにより、効率の良い洗浄液の再生ができる。そして、本発明の請求項８は、前記第１の処理槽、前記第２の処理槽、前記高圧電源装置、前記廃液供給装置、前記送液ポンプ、前記再生液回収装置、前記水排水装置、前記ろ過装置及び前記制御装置一式を一つに組込むことにより、装置のコンパクト化が可能になる。 According to the first aspect of the present invention, the device can be easily manufactured because of the simple device structure, the manufacturing cost can be greatly reduced, and a high-purity cleaning liquid can be obtained.
According to a second aspect of the present invention, since the positive electrodes of the first processing tank and the second processing tank are both mesh plates through which the cleaning liquid passes, the supernatant cleaning liquid can be easily passed.
According to a third aspect of the present invention, the electric field strength between the positive electrode and the negative electrode of the second processing tank is larger than the electrolytic strength of the positive electrode and the negative electrode of the first processing tank. The ink pigment remaining in the treatment tank and a trace amount of water can be separated.
According to the fourth aspect of the present invention, the cleaning liquid can be efficiently separated by setting the electric field strength of the electrode of the first treatment tank to 0.07 kV / mm or more. Similarly, the fifth aspect of the present invention can efficiently separate the cleaning liquid by setting the electric field strength of the electrode of the second treatment tank to 0.05 kV / mm or more.
According to a sixth aspect of the present invention, the apparatus can be miniaturized by supplying a voltage to the positive electrodes of the first processing tank and the second processing tank from a single power source.
According to a seventh aspect of the present invention, there is provided a high-voltage power supply device that applies a voltage to the electrodes of the first processing tank and the second processing tank, a waste liquid supply device that stores the waste liquid supplied to the first processing tank, and a waste liquid as a waste liquid. A liquid feed pump for pumping from the supply device to the first treatment tank, a regenerative liquid recovery device for collecting the cleaning liquid from the second treatment tank, a water drainage device for draining water from the first treatment tank, the first Efficient regeneration of cleaning liquid by providing a filtration device for filtering the ink pigment introduced between the first treatment tank and the waste liquid supply device, and a control device for operating these devices. Can do. According to an eighth aspect of the present invention, the first treatment tank, the second treatment tank, the high-voltage power supply device, the waste liquid supply device, the liquid feed pump, the regenerated liquid recovery device, the water drainage device, By incorporating the filtration device and the set of control devices into one, the device can be made compact.

以下、本発明の実施の形態における２槽式の廃液再生装置の概要を図面を参照しながら説明する。
図１及び図２は、本発明に係わる印刷機の廃液再生装置１を示し、図１は廃液再生装置１の稼働前の状態であり、図２は稼働後の状態を示す。
廃液再生装置１には、第１の再生液処理槽（以下、第１の処理槽とも言う）２と第２の再生液処理槽（以下、第２の処理槽とも言う）３が設けてある。第１及び第２の処理槽２，３は、縦方向に配設されている堰壁１０で仕切られている。第１の処理槽２の堰壁１０と反対側壁部１０ａには、間隔を空けて仕切り板９が設けられ、この仕切り板９は上下方向に配置され、下端部が第１の処理槽２のほぼ中間位置まで延びている。壁部１０ａと仕切り板９との間の上側には、印刷機から排出された廃液４の供給部８が設けられている。 Hereinafter, an outline of a two-tank waste liquid recycling apparatus in an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a waste liquid regenerating apparatus 1 for a printing press according to the present invention, FIG. 1 shows a state before the operation of the waste liquid regenerating apparatus 1, and FIG. 2 shows a state after the operation.
The waste liquid regenerating apparatus 1 is provided with a first regenerating liquid processing tank (hereinafter also referred to as a first processing tank) 2 and a second regenerating liquid processing tank (hereinafter also referred to as a second processing tank) 3. . The 1st and 2nd process tanks 2 and 3 are partitioned off by the dam wall 10 arrange | positioned by the vertical direction. A partition plate 9 is provided at a distance from the dam wall 10 and the opposite side wall portion 10a of the first treatment tank 2, the partition plate 9 is arranged in the vertical direction, and the lower end portion of the first treatment tank 2 is the first treatment tank 2. It extends almost to the middle position. On the upper side between the wall 10a and the partition plate 9, a supply unit 8 for the waste liquid 4 discharged from the printing press is provided.

第１の処理槽２の底部には、マイナス電極５として使用する水７を入れてある。このため、特別な電極を必要としてしない。プラス電極６は、仕切り板９と堰壁１０との間に水平方向に配置され、洗浄液が流通できる多数の孔が形成されたメッシュ方式の電極板（プラス電極をメッシュ電極ともいう）である。
ここで、例えば廃液供給流量密度をｑ＝０．５Ｌ／ｍｉｎ／ｍ²、印加電圧を５ｋＶとし、適性電界強度をＤＶ＝０．１２５ｋＶ／ｍｍとすると、プラス電極６とマイナス電極５の水７面間の距離はＬＤ１＝４０ｍｍとなるように設定しておく。
なお、ＬＤ１の間隔を小さくすると、電界強度が大きくなるので、電極間距離ＬＤ１は大きい方が良い。また、ＬＤ１を大きくした方が、分離したインキ顔料を多く貯留できる。別の例として、前述した電界強度がほぼ同一で、印加電圧と電極間距離を大きくしたものを示すと、廃液供給流量密度をｑ＝０．５Ｌ／ｍｉｎ／ｍ²、電極板電圧１０ｋＶ、電界強度ＤＶ＝０．１２５ｋＶ／ｍｍとし、電極間距離はＬＤ＝８０ｍｍまで大きくできる。 Water 7 used as the negative electrode 5 is placed at the bottom of the first treatment tank 2. For this reason, a special electrode is not required. The plus electrode 6 is a mesh-type electrode plate (a plus electrode is also referred to as a mesh electrode) that is arranged in the horizontal direction between the partition plate 9 and the dam wall 10 and has a large number of holes through which the cleaning liquid can flow.
Here, for example, when the waste liquid supply flow density is q = 0.5 L / min / m ² , the applied voltage is 5 kV, and the appropriate electric field strength is DV = 0.125 kV / mm, the water 7 of the plus electrode 6 and the minus electrode 5 The distance between the surfaces is set so that LD1 = 40 mm.
Note that, if the interval between the LDs 1 is reduced, the electric field strength increases, so that the interelectrode distance LD1 is preferably large. Moreover, the larger the LD1, the larger the separated ink pigment can be stored. As another example, when the above-described electric field strength is substantially the same and the applied voltage and the distance between the electrodes are increased, the waste liquid supply flow density is q = 0.5 L / min / m ² , the electrode plate voltage is 10 kV, the electric field is The strength DV = 0.125 kV / mm, and the distance between the electrodes can be increased to LD = 80 mm.

第２の処理槽３には、堰壁１０側の上部に、洗浄液の供給部１１が設けられ、供給部１１は堰壁１０と仕切り板１２で隔離されている。洗浄液は、堰壁１０を超えて第２の処理槽３に供給される。仕切り板１２は、上下方向に配置され下端部が第２の処理槽３のほぼ上下中間位置まで延びている。そして、堰壁１０に対向させて壁１４が設けられ、壁１４に隣接させて回収タンク１７を配設している。第２の処理槽では、洗浄液が壁１４を超えて、回収タンク１７に供給され、回収タンク１７から回収装置１８に回収される。
プラス電極１３は、仕切り板１２と壁１４の間に水平方向に配置され、洗浄液が流通できる多数の孔を形成したメッシュ形状の電極板である。第２の処理槽３が第１の処理槽２と異なる点は、処理槽内にマイナス電極として水を使用せず、容器底部自体をマイナス電極とし、若しくは底部上にマイナス電極１５を設けることにある。その理由は、既に水のほとんどが第１の処理槽２で分離されていること、また水をマイナス電極としなければ、印加電圧は放電しないので、電界強度を強くできることにある。
そのため、本実施例では、第２の処理槽３のプラス電極１３であるメッシュ電極板とマイナス電極１５には５ｋＶの電圧を使用する。そして、マイナス電極（容器底部）１５までの距離はＬＤ２＝３０ｍｍとする。この場合の電界強度はＤＶ＝５／３０＝０．１７ｋＶ／ｍｍであり、再生洗浄液供給流量ｑ＝０．５Ｌ／ｍｉｎとした。 In the second treatment tank 3, a cleaning liquid supply unit 11 is provided on the upper side of the dam wall 10, and the supply unit 11 is isolated by the dam wall 10 and the partition plate 12. The cleaning liquid is supplied to the second treatment tank 3 beyond the dam wall 10. The partition plate 12 is arranged in the vertical direction, and the lower end portion extends to the substantially vertical middle position of the second treatment tank 3. A wall 14 is provided so as to face the dam wall 10, and a collection tank 17 is disposed adjacent to the wall 14. In the second treatment tank, the cleaning liquid passes over the wall 14 and is supplied to the recovery tank 17 and is recovered from the recovery tank 17 to the recovery device 18.
The plus electrode 13 is a mesh-shaped electrode plate that is arranged in the horizontal direction between the partition plate 12 and the wall 14 and has a large number of holes through which the cleaning liquid can flow. The second processing tank 3 is different from the first processing tank 2 in that water is not used as a negative electrode in the processing tank, the container bottom itself is used as a negative electrode, or a negative electrode 15 is provided on the bottom. is there. The reason is that most of the water has already been separated in the first treatment tank 2, and if the water is not used as a negative electrode, the applied voltage is not discharged, so that the electric field strength can be increased.
Therefore, in this embodiment, a voltage of 5 kV is used for the mesh electrode plate and the negative electrode 15 which are the positive electrodes 13 of the second treatment tank 3. The distance to the negative electrode (container bottom) 15 is LD2 = 30 mm. The electric field strength in this case was DV = 5/30 = 0.17 kV / mm, and the regeneration cleaning liquid supply flow rate q = 0.5 L / min.

以下、本発明の廃液再生装置の作用について説明する。
廃液４は、図２のように第１の処理槽２、第２の処理槽３にきれいな、もしくは再生した溶剤（再生液）を満杯に供給しておく。その後は、廃液供給部８から、廃液４を廃液供給部から所定流量で供給することができる。
図１の状態で、印加電圧を作用させながら廃液４を供給すると、廃液４は仕切り板９の下部を通過してメッシュ電極６のあるところへ移動する。そして静電界作用により水７とインキ顔料１９と洗浄液（溶剤）１６に分離される。水７は、容器下部に沈降し、インキ顔料１９はマイナス電極である水７の表面に付着する。そして、再生された洗浄液１６は、メッシュ電極６の穴を通過してメッシュ電極６よりも上の位置にある溶剤回収部２０に流れ込む。 Hereinafter, the operation of the waste liquid recycling apparatus of the present invention will be described.
As shown in FIG. 2, the waste liquid 4 is supplied to the first processing tank 2 and the second processing tank 3 with a clean or regenerated solvent (regenerated liquid). Thereafter, the waste liquid 4 can be supplied from the waste liquid supply unit 8 at a predetermined flow rate from the waste liquid supply unit.
In the state of FIG. 1, when the waste liquid 4 is supplied while applying an applied voltage, the waste liquid 4 passes through the lower part of the partition plate 9 and moves to a place where the mesh electrode 6 is located. And it is isolate | separated into the water 7, the ink pigment 19, and the washing | cleaning liquid (solvent) 16 by an electrostatic field effect. The water 7 settles in the lower part of the container, and the ink pigment 19 adheres to the surface of the water 7 that is a negative electrode. Then, the regenerated cleaning liquid 16 passes through the holes of the mesh electrode 6 and flows into the solvent recovery unit 20 located above the mesh electrode 6.

第１の処理槽２の溶剤回収部２０に流れ込んだ再生洗浄液１６は、図２に示すように第１の処理槽２の堰壁１０を越えて、第２の処理槽３の供給部１１に流れ込む。この第２の処理槽３に流れ込む再生洗浄液１６は、第１の処理槽２でほぼきれいに分離・再生されているが、わずかに残存するインキ顔料や水を完全に分離するのが第２の処理槽３の配設目的である。
第２の処理槽３で分離された微小の水７とインキ顔料１９は、マイナス電極１５である容器の底部に付着若しくは溜まる。そして、メッシュ電極１３を通過した再生洗浄液１６は、第２の処理槽３の壁１４を越えて、再生洗浄液の回収タンク１７に流れ込む。この回収タンク１７に流れ込んだ再生洗浄液１６は、回収装置１８により回収され、次の洗浄に使用される。 The regenerated cleaning liquid 16 that has flowed into the solvent recovery unit 20 of the first processing tank 2 passes over the weir wall 10 of the first processing tank 2 and enters the supply unit 11 of the second processing tank 3 as shown in FIG. Flows in. The regenerated cleaning liquid 16 flowing into the second treatment tank 3 is separated and regenerated almost cleanly in the first treatment tank 2, but the second treatment is to completely separate slightly remaining ink pigment and water. This is the purpose of disposing the tank 3.
The minute water 7 and the ink pigment 19 separated in the second treatment tank 3 adhere to or accumulate on the bottom of the container, which is the negative electrode 15. Then, the regenerated cleaning liquid 16 that has passed through the mesh electrode 13 passes over the wall 14 of the second treatment tank 3 and flows into the regenerated cleaning liquid recovery tank 17. The regenerated cleaning liquid 16 that has flowed into the recovery tank 17 is recovered by the recovery device 18 and used for the next cleaning.

以上説明したように、第１の処理槽２に供給された廃液４は、第１の処理槽２で一次分離され、第２の処理槽３で二次分離され、高純度に分離・回収される。なおこの処理は連続して行われる。ここで処理槽内に分離されたインキ顔料１９及び水７は、それぞれ専用の回収装置にて処理槽外へ定期的に排出される。 As described above, the waste liquid 4 supplied to the first treatment tank 2 is primarily separated in the first treatment tank 2 and secondarily separated in the second treatment tank 3 to be separated and recovered with high purity. The This process is performed continuously. Here, the ink pigment 19 and the water 7 separated into the processing tank are periodically discharged out of the processing tank by dedicated recovery devices.

図３〜図５に本発明の具体的な実施の形態を示す。
図３は、本発明のフローシートを示す。本実施例の廃液再生装置１は、第１の処理槽２と第２の処理槽３で構成される。第１の処理槽２には、廃液４の供給部８と仕切り板９，２１及びアース電極としての水７が設けてある。一方の仕切り板２１は、廃液４の供給部８を形成し、他方の仕切り板２２は、メッシュ電極６を取付けている。メッシュ電極６は、水表面との距離ＬＤ１に応じて印加電圧を決定する。ここでは、一例として印加電圧５ｋＶ、ＬＤ１＝４０ｍｍとしてある。第１の処理槽２から第２の処理槽３へは洗浄液を供給する流通部２５を介して、再生洗浄液が流れる構成となっている。
第２の処理槽３は、再生洗浄液の供給部１１があり２枚の仕切り板２３，２４で仕切られている。ここで第１及び第２の処理槽２，３とも、液供給部８，１１に２枚の仕切り板２１〜２４を設けてある。仕切り板を２枚設けた理由は、廃液または洗浄液が処理槽内で攪拌されるのを防止する役割を果たせるためである。第２の処理槽３で処理された再生洗浄液１６は、流通部２６を介して、回収タンク１７に流れ込み、回収される。 3 to 5 show specific embodiments of the present invention.
FIG. 3 shows a flow sheet of the present invention. The waste liquid recycling apparatus 1 according to the present embodiment includes a first processing tank 2 and a second processing tank 3. The first treatment tank 2 is provided with a supply unit 8 for waste liquid 4, partition plates 9 and 21, and water 7 as a ground electrode. One partition plate 21 forms the supply unit 8 for the waste liquid 4, and the other partition plate 22 has the mesh electrode 6 attached thereto. The mesh electrode 6 determines the applied voltage according to the distance LD1 with the water surface. Here, as an example, the applied voltage is 5 kV and LD1 = 40 mm. The regenerated cleaning liquid flows from the first processing tank 2 to the second processing tank 3 through a circulation unit 25 that supplies the cleaning liquid.
The second treatment tank 3 has a regenerative cleaning liquid supply unit 11 and is partitioned by two partition plates 23 and 24. Here, in both the first and second treatment tanks 2 and 3, two partition plates 21 to 24 are provided in the liquid supply units 8 and 11. The reason for providing two partition plates is to play a role of preventing the waste liquid or the cleaning liquid from being stirred in the treatment tank. The regenerated cleaning liquid 16 processed in the second processing tank 3 flows into the recovery tank 17 through the circulation part 26 and is recovered.

次に、水と廃液の供給や再生洗浄液の回収及び分離した水、インキ顔料の排水・除去方法について説明する。
マイナス電極５として使用する水７は、あらかじめ手動で所定位置まで供給しておく。その後廃液を廃液タンク３１から送液ポンプ３４で第１槽の供給部へ圧送する。第２の処理槽３で完全に処理された再生洗浄液１６は、バルブ３５の開で再生液タンク３３に回収される。なお、符号４２は第１の処理槽２と廃液タンク３１の間の流量を規制するバルブである。
また、再生処理により分離し、低部に沈降した水は排水タンク３２に排水回収される。以上の廃液供給、再生液回収、分離水排水の作業は、処理作業中は連続して行われる。なお処理により分離したインキ顔料の除去は、処理作業を中止したのち行う。このインキ顔料除去作業は、定期的に（例えば１回／週）行うものである。
その手順は、第１の処理槽２、第２の処理槽３の低部に設けた排水管のバルブ３６，３７を開き、廃液タンク３１の直前に設けてあるインキ顔料除去ろ過器３８に、廃液４、水７と一緒に排出する。この時分離して水７の表面に付着しているインキ顔料は、廃液４や水７とともに排出され、ろ過器３８にてインキ顔料はろ過器３８に付着し、廃液４と水は廃液タンク３１へ回収される。ろ過器３８に付着したインキ顔料は、ろ過器３８に設けてあるフィルターごと廃棄される。その後、新たなフィルターをろ過器３８にセットし、次の処理まで待機しておく。 Next, water and waste liquid supply, recovery cleaning liquid recovery, and separated water and ink pigment drainage and removal methods will be described.
The water 7 used as the negative electrode 5 is manually supplied to a predetermined position in advance. Thereafter, the waste liquid is pumped from the waste liquid tank 31 to the supply section of the first tank by the liquid feed pump 34. The regenerated cleaning liquid 16 that has been completely processed in the second processing tank 3 is recovered in the regenerating liquid tank 33 when the valve 35 is opened. Reference numeral 42 denotes a valve that regulates the flow rate between the first treatment tank 2 and the waste liquid tank 31.
Further, the water separated by the regeneration process and settled in the lower part is drained and collected in the drain tank 32. The above-described waste liquid supply, reclaimed liquid recovery, and separated water drainage operations are continuously performed during the processing operation. The ink pigment separated by the treatment is removed after the treatment operation is stopped. This ink pigment removal operation is performed periodically (for example, once / week).
The procedure is to open the drain pipe valves 36 and 37 provided in the lower part of the first treatment tank 2 and the second treatment tank 3, and to the ink pigment removal filter 38 provided immediately before the waste liquid tank 31. Drain together with waste liquid 4 and water 7. The ink pigment separated at this time and adhering to the surface of the water 7 is discharged together with the waste liquid 4 and the water 7, and the ink pigment adheres to the filter 38 by the filter 38, and the waste liquid 4 and water are separated from the waste liquid tank 31. To be recovered. The ink pigment adhering to the filter 38 is discarded together with the filter provided in the filter 38. Thereafter, a new filter is set in the filter 38 and waits until the next processing.

図４及び図５は、本発明の装置構成の一例であり、図４は平面図であり、図５は正面図である。
図に示すように、第１及び第２の処理槽２，３の下方に電極板への印加電圧用の高圧電源ボックス３９を配し、図の左側に廃液を第１の処理槽２へ送るための送液ポンプ３４を配置し、右側に制御盤４０を配置してある。
また、装置下部には排水タンク３２、廃液タンク３１、再生液タンク３３を設けてある。廃液タンク３１の上部には、インキ顔料除去用の顔料除去ろ過器３８が配してある。ここで符号４１は装置架台である。 4 and 5 are examples of the apparatus configuration of the present invention, FIG. 4 is a plan view, and FIG. 5 is a front view.
As shown in the figure, a high voltage power supply box 39 for applying voltage to the electrode plate is arranged below the first and second treatment tanks 2 and 3, and waste liquid is sent to the first treatment tank 2 on the left side of the figure. A liquid feed pump 34 is disposed, and a control panel 40 is disposed on the right side.
A drain tank 32, a waste liquid tank 31, and a regenerated liquid tank 33 are provided at the lower part of the apparatus. Above the waste liquid tank 31, a pigment removal filter 38 for removing the ink pigment is disposed. Here, reference numeral 41 denotes an apparatus mount.

［実施例１］
図６は、本発明の基本とする廃液処理槽を示す。廃液処理槽は、仕切り板９で形成された廃液４の供給部８を設け、仕切り板９と縦壁１０ａとの間にはメッシュ板形状のプラス電極（以下、メッシュ電極ともいう）６を設けている。メッシュ電極６の下側の底部には水７が層となって充填し、この水７をマイナス電極５とし、水７の上側に印刷機のインキ顔料、水、洗浄液が含まれる廃液が供給される。図６中の想像線１５は、マイナス電極５を水７に代えて廃液処理槽の底部にマイナス電極線を設けたものを示す。
この廃液再生処理槽が、効果的に稼働するための廃液の処理流量ｑと電界強度ＤＶの関係を明確にするために、試験を行った。
試験内容は、メッシュ電極６を通過する洗浄液の流量（処理流量ｑ）、電極の電界強度ＤＶの関係を調べた。電界強度は、メッシュ電極６の電圧ｋＶとメッシュ電極６とアース電極板（ここでは水７）５間の距離ＬＤから決まるものでＤＶ＝電圧ｋＶ／距離ＬＤ（ｋＶ／ｍｍ）である。 [Example 1]
FIG. 6 shows a waste liquid treatment tank based on the present invention. The waste liquid treatment tank is provided with a supply unit 8 for the waste liquid 4 formed by the partition plate 9, and a mesh plate-shaped plus electrode (hereinafter also referred to as a mesh electrode) 6 is provided between the partition plate 9 and the vertical wall 10a. ing. The bottom of the mesh electrode 6 is filled with water 7 as a layer. The water 7 is used as a negative electrode 5, and the waste liquid containing ink pigment, water, and cleaning liquid is supplied to the upper side of the water 7. The An imaginary line 15 in FIG. 6 indicates that the negative electrode 5 is replaced with water 7 and a negative electrode line is provided at the bottom of the waste liquid treatment tank.
A test was conducted in order to clarify the relationship between the waste liquid treatment flow rate q and the electric field strength DV for the waste liquid regeneration treatment tank to operate effectively.
The contents of the test examined the relationship between the flow rate of the cleaning liquid passing through the mesh electrode 6 (treatment flow rate q) and the electric field strength DV of the electrode. The electric field strength is determined by the voltage kV of the mesh electrode 6 and the distance LD between the mesh electrode 6 and the earth electrode plate (here, water 7) 5, and DV = voltage kV / distance LD (kV / mm).

電界強度ＤＶの範囲は、０．０７ｋＶ／ｍｉｎ〜０．５ｋＶ／ｍｉｎ、廃液供給流量密度ｑの範囲は、０．１Ｌ／ｍｉｎ／ｍ²〜４．０Ｌ／ｍｉｎ／ｍ²で試験を行った。廃液から洗浄液を再生できる範囲において、洗浄液の流量に対する電界強度は、以下の結果である。
（１）廃液供給流量０．１Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．０７ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（２）廃液供給流量０．３Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．０７ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（３）廃液供給流量０．５Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．０８ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（４）廃液供給流量１．０Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．０９ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（５）廃液供給流量１．５Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．１１ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（６）廃液供給流量２．０Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．１５ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（７）廃液供給流量２．５Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．２５ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（８）廃液供給流量３．０Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．３５ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
（９）廃液供給流量４．０Ｌ／ｍｉｎ／ｍ²の時のＤＶ：
０．４５ｋＶ／ｍｍ〜０．５ｋＶ／ｍｍ
であった。 The range of electric field strength DV was 0.07 kV / min to 0.5 kV / min, and the range of waste liquid supply flow density q was 0.1 L / min / m ^{2 to} 4.0 L / min / m ² . . In the range where the cleaning liquid can be regenerated from the waste liquid, the electric field strength with respect to the flow rate of the cleaning liquid is as follows.
(1) DV at a waste liquid supply flow rate of 0.1 L / min / m ² :
0.07 kV / mm to 0.5 kV / mm
(2) DV at a waste liquid supply flow rate of 0.3 L / min / m ² :
0.07 kV / mm to 0.5 kV / mm
(3) DV at a waste liquid supply flow rate of 0.5 L / min / m ² :
0.08 kV / mm to 0.5 kV / mm
(4) DV at a waste liquid supply flow rate of 1.0 L / min / m ² :
0.09 kV / mm to 0.5 kV / mm
(5) DV at a waste liquid supply flow rate of 1.5 L / min / m ² :
0.11 kV / mm to 0.5 kV / mm
(6) DV at a waste liquid supply flow rate of 2.0 L / min / m ² :
0.15 kV / mm to 0.5 kV / mm
(7) DV at a waste liquid supply flow rate of 2.5 L / min / m ² :
0.25 kV / mm to 0.5 kV / mm
(8) DV at a waste liquid supply flow rate of 3.0 L / min / m ² :
0.35 kV / mm to 0.5 kV / mm
(9) DV at waste liquid supply flow rate 4.0 L / min / m ² :
0.45 kV / mm to 0.5 kV / mm
Met.

電界強度ＤＶの使用範囲の上限値を、０．５ｋＶ／ｍｍとしたのは、底部の水をアースとした場合に電界強度が大きいと放電が発生するので、０．５ｋＶ／ｍｍに押さえている。したがって、電界強度ＤＶの上限値は、放電が生じる前の電界強度である。なお、放電は電界強度が、０．５ｋＶ／ｍｍでは生じない。なお、廃液供給流量密度ｑが５．６Ｌ／ｍｉｎ／ｍ²以上であっても、電界強度の上限値は放電が生じる前の電界強度の大きさである。
電界強度の好ましい下限値は、廃液供給流量密度ｑが０．３Ｌ／ｍｉｎ／ｍ²のときにメッシュ電極間をインキ顔料が通過する電界強度で、０．０７ｋＶ／ｍｍである。廃液供給流量密度ｑが０．３Ｌ／ｍｉｎ／ｍ²以下であっても、電界強度下限値は小さくできるが、廃液再生時間が長く実務に見合わない結果となった。 The upper limit of the range of use of the electric field strength DV is set to 0.5 kV / mm because the discharge occurs when the electric field strength is large when the water at the bottom is grounded. . Therefore, the upper limit value of the electric field strength DV is the electric field strength before discharge occurs. Discharge does not occur when the electric field strength is 0.5 kV / mm. Even if the waste liquid supply flow density q is 5.6 L / min / m ² or more, the upper limit value of the electric field strength is the magnitude of the electric field strength before discharge occurs.
The preferable lower limit value of the electric field intensity, waste feed flow density q is an electric field strength between the mesh electrode passes ink pigment at 0.3L / min / m ^2, a 0.07kV / mm. Even if the waste liquid supply flow density q is 0.3 L / min / m ² or less, the lower limit value of the electric field strength can be reduced, but the waste liquid regeneration time is long and the result is not suitable for practical use.

試験データから以下の結果が分かる。
電界強度の適性値は洗浄廃液の処理流量により変化し、廃液供給流量密度ｑが多くなるにつれて、電界強度を大きくする必要がある。上限値は放電のため流量に関係なく一定である。
次に、図６の廃液処理槽の底部を電極として、第２の処理槽３に対応させた試験を行った。電界強度ＤＶの範囲は、０．０５ｋＶ／ｍｍ〜４．０ｋＶ／ｍｍであった。上限値は、底面にマイナス電極板を配置しているため、通常の平板電極と同様の放電を考慮すればよい。よって、実質的な電界強度の上限値は、メッシュ電極とマイナス電極間で放電が生じる前の電界強度である。
また、電界強度の下限値は、水をマイナス電極にしたものと同様であり、メッシュ電極間をインキ顔料が通過する電界強度で、０．０７ｋＶ／ｍｍが好ましい範囲であった。 The following results can be seen from the test data.
The appropriate value of the electric field strength varies depending on the processing flow rate of the cleaning waste liquid, and it is necessary to increase the electric field strength as the waste liquid supply flow rate density q increases. The upper limit is constant regardless of the flow rate because of discharge.
Next, the test corresponding to the 2nd processing tank 3 was done by making the bottom part of the waste-liquid processing tank of FIG. 6 into an electrode. The range of the electric field strength DV was 0.05 kV / mm to 4.0 kV / mm. Since the negative electrode plate is disposed on the bottom surface, the upper limit value may be determined by considering the same discharge as that of a normal flat plate electrode. Therefore, the upper limit value of the substantial electric field strength is the electric field strength before discharge occurs between the mesh electrode and the negative electrode.
The lower limit value of the electric field strength was the same as that obtained when water was used as the negative electrode, and the electric field strength at which the ink pigment passed between the mesh electrodes was 0.07 kV / mm.

以上、本発明の実施の形態について説明したが、勿論、本発明はこれに限定されることなく本発明の技術的思想に基いて種々の変形及び変更が可能である。
例えば、上記実施の形態では、再生液処理槽を２槽設けたが、第１の処理槽２及び（または）第２の処理槽３を付加して、３槽以上設けてもよい。 Although the embodiments of the present invention have been described above, the present invention is of course not limited thereto, and various modifications and changes can be made based on the technical idea of the present invention.
For example, in the above-described embodiment, two regeneration liquid treatment tanks are provided, but three or more tanks may be provided by adding the first treatment tank 2 and / or the second treatment tank 3.

同実施の形態の２槽式の廃液再生装置（第２の処理槽に洗浄液が供給される前）の概略側断面図である。It is a schematic sectional side view of the 2 tank type waste liquid reproduction | regeneration apparatus (before a washing | cleaning liquid is supplied to a 2nd processing tank) of the embodiment. 同実施の形態の２槽式の廃液再生装置（第２の処理槽に洗浄液が供給された状態）の概略側断面図である。It is a schematic sectional side view of the 2 tank type waste-liquid reproduction | regeneration apparatus (state with the washing | cleaning liquid supplied to the 2nd processing tank) of the embodiment. 同実施の形態の２槽式の廃液再生装置の概略流れ図である。It is a schematic flowchart of the 2 tank type waste liquid reproduction | regeneration apparatus of the embodiment. 同実施の形態の２槽式の廃液再生装置の概略平面図である。It is a schematic plan view of the 2 tank type waste liquid reproduction | regeneration apparatus of the embodiment. 同実施の形態の２槽式の廃液再生装置の概略側面図である。It is a schematic side view of the 2 tank type waste liquid reproduction | regeneration apparatus of the embodiment. 本発明の実施の形態の廃液再生装置の再生液処理槽の基本的構成を示す側断面図である。It is a sectional side view which shows the basic composition of the reclaimed liquid processing tank of the waste liquid reproducing | regenerating apparatus of embodiment of this invention. 従来の廃液再生装置の概略側断面図である。It is a schematic sectional side view of the conventional waste liquid reproduction | regeneration apparatus.

Explanation of symbols

１廃液再生装置
２第１の再生液処理槽
３第２の再生液処理槽
４廃液
５，１５マイナス電極
６，１３プラス電極（メッシュ電極）
７水
８廃液の供給部
９，１２，２１〜２４仕切り板
１０堰壁
１０ａ縦壁
１１洗浄液の供給部
１４壁
１６再生洗浄壁
１７回収タンク
１８回収装置
１９インキ顔料
２０溶剤回収部
２５，２６流通部
３１廃液タンク
３２排水タンク
３３再生液タンク
３４送液ポンプ
３５〜３７バルブ
３８顔料除去ろ過器
３９高圧電源ボックス
４０制御盤
４１装置架台 DESCRIPTION OF SYMBOLS 1 Waste liquid reproduction | regeneration apparatus 2 1st regeneration liquid processing tank 3 2nd regeneration liquid processing tank 4 Waste liquid 5,15 Negative electrode 6,13 Positive electrode (mesh electrode)
7 Water 8 Waste liquid supply unit 9, 12, 21 to 24 Partition plate 10 Weir wall 10a Vertical wall 11 Cleaning liquid supply unit 14 Wall 16 Recycled cleaning wall 17 Collection tank 18 Collection device 19 Ink pigment 20 Solvent collection unit 25, 26 Distribution Unit 31 Waste liquid tank 32 Drain tank 33 Reclaimed liquid tank 34 Liquid feed pump 35 to 37 Valve 38 Pigment removal filter 39 High pressure power supply box 40 Control panel 41 Equipment stand

Claims

Place the plus electrode on the upper side of the waste liquid regeneration treatment tank and the negative electrode on the lower side, and put the waste liquid containing ink pigment, water, and cleaning liquid used in the printing machine into the waste liquid regeneration treatment tank, and between the electrodes The waste liquid is subjected to an electrostatic field treatment by applying a voltage to the negative electrode, the ink pigment is guided to the negative electrode, the aggregated water is allowed to settle at the bottom of the waste liquid treatment tank, and a washing liquid having a lighter specific gravity than the water is used as a supernatant liquid. In a waste liquid recycling apparatus for a printing press that separates and regenerates cleaning liquid from the waste liquid,
The waste liquid regeneration treatment tank is made up of two tanks, each of which is provided with a positive electrode and a negative electrode, and is constituted by a first treatment tank and a second treatment tank,
The negative electrode of the first treatment tank is water at the bottom of the first treatment tank,
The negative electrode of the second processing tank is provided at the bottom of the second processing tank,
The cleaning liquid separated in the first processing tank is supplied to the second processing tank, and the residual ink pigment and water mixed in the cleaning liquid are further separated in the second processing tank. Waste liquid recycling device for printing press.

2. The waste liquid recycling apparatus for a printing press according to claim 1, wherein both the positive electrodes of the first processing tank and the second processing tank are mesh plates through which a cleaning liquid is passed.

3. The printing according to claim 1, wherein the electric field strength between the positive electrode and the negative electrode of the second processing tank is larger than the electrolytic strength of the positive electrode and the negative electrode of the first processing tank. 4. Waste liquid recycling device for machine.

The waste liquid recycling apparatus for a printing press according to any one of claims 1 to 3, wherein the electric field strength of the electrode of the first treatment tank is 0.07 kV / mm or more.

The waste liquid recycling apparatus for a printing press according to any one of claims 1 to 3, wherein the electric field strength of the electrode of the second treatment tank is 0.05 kV / mm or more.

The waste liquid regeneration of a printing press according to any one of claims 1 to 5, wherein a voltage is supplied to the positive electrodes of the first processing tank and the second processing tank by a single power source. apparatus.

A high-voltage power supply device that applies a voltage to the electrodes of the first treatment tank and the second treatment tank, a waste liquid supply device that accumulates waste liquid to be supplied to the first treatment tank, and a waste liquid from the waste liquid supply apparatus to the first treatment. A liquid feed pump for pumping to the tank, a regeneration liquid recovery apparatus for recovering the cleaning liquid from the second processing tank, a water drainage device for draining water from the first processing tank, the first processing tank and a waste liquid supply device A filter device for filtering the ink pigment introduced from the first treatment tank and a control device for managing these devices are provided. A waste liquid recycling apparatus for a printing press as described.

A set of the first processing tank, the second processing tank, the high-voltage power supply device, the waste liquid supply device, the liquid feed pump, the regenerated liquid recovery device, the water drainage device, the filtration device, and the control device. The waste liquid recycling apparatus for a printing press according to claim 7, wherein the apparatus is incorporated in one apparatus.