JP4365697B2 - Waste liquid recycling apparatus and waste liquid recycling method for printing press - Google Patents

Description

  The present invention relates to an apparatus and a method for regenerating waste liquid generated during cleaning of printing press components such as a blanket cylinder of a printing press, and more particularly to charged ink pigments, insulating cleaning liquid, and conductive water. The present invention relates to a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press, in which the three components are separated by a single apparatus.

Waste liquid comes out when washing the blanket cylinder and impression cylinder of a printing press. However, in consideration of the global environment, there is an increasing movement to dispose of this waste liquid by performing some kind of treatment. In this case, the cost for disposal (disposal cost) is increased, and a large amount of cleaning liquid is used to clean the blanket cylinder and the like, which increases the running cost.
Therefore, recently, attempts have been made to reprocess the waste liquid and reuse the cleaning liquid. Various methods have been proposed as a method for regenerating waste liquid. However, waste liquid containing three components of charged ink pigment, insulating cleaning liquid, and conductive water in that it can be regenerated with high efficiency. Attention has been focused on an electrostatic field utilization system in which an ink pigment, a cleaning liquid, and water are separated by generating an electrostatic field therein and electrostatically aggregating the ink pigment and water.

  For example, in Patent Document 1, as shown in FIG. 6, a waste liquid 61 is introduced into a waste liquid tank 60 from a waste liquid input pipe 42, passes through wire mesh electrode plates 65a and 65b, and a regeneration tank 64 between insulating walls 62 and 63. A waste liquid regenerating apparatus is disclosed in which a voltage is applied to the waste liquid 61 that has entered the apparatus by electrode plates 65a and 65b to separate the waste liquid 61 into an ink pigment 66, a regenerating liquid (cleaning liquid) 67, and water 68. In the apparatus according to Patent Document 1, the separated regeneration liquid 67 is recovered from the regeneration tank 64 to the regeneration liquid tank 70 through the regeneration liquid recovery pipe 69, and the water 68 is recovered from the water tank 71 to the recovery water tank 73 through the water recovery pipe 72. To do. Then, the ink pigment 66 having a high viscosity opens the on-off valve 74 provided in the lower part of the water tank 71 and is rapidly discharged to the outside together with the waste liquid 61, the regenerated liquid 67, and the water 68 by the water flow.

Also, Patent Document 2 discloses a waste liquid recycling apparatus using an electrostatic field utilization method. Further, Patent Document 2 discloses various methods (1) to (3) related to the disposal of ink pigments as described below. ) Has been proposed.
(1) A ground electrode was placed horizontally at the bottom of the waste liquid container, and when water and ink pigment were stored above the ground electrode, the ground electrode was slid horizontally and pulled out of the container, and stored at the top of the ground electrode. A method of discharging water and ink pigments out of the container (hereinafter referred to as a horizontal slide method).

(2) A method in which an ink pigment is attached to the surface of an aluminum foil as an earth electrode or the surface of a thin paper pressed against the earth electrode, and the aluminum foil or the thin paper is wound up by a winding device and discarded as it is (hereinafter referred to as winding) This is called the removal method).
(3) A method in which the ink pigment adhering to the earth electrode plate is scraped off to the lower part of the container by a scraping blade and periodically discharged to the outside of the container (hereinafter referred to as a scraping method).
JP 2002-292934 A JP 2002-79259 A

However, in the technique disclosed in Patent Document 1 described above, when the ink pigment is discharged, water and cleaning liquid are also discharged together. Therefore, the regeneration process must be stopped once, and the regeneration process is continuously performed. I can't do it.
Similarly to Patent Document 1, the horizontal slide method disclosed in Patent Document 2 must be stopped once for discharging the ink pigment, and cannot be continuously performed. .

Furthermore, the winding method disclosed in Patent Document 2 increases the cost of the apparatus due to the complicated configuration of the winding apparatus, and also costs for replacing aluminum foil or thin paper with a new one. .
The scraping method disclosed in Patent Document 2 is not easy to remove the ink pigment because the scraped ink pigment is mixed or floated in the cleaning liquid.

  Furthermore, in the techniques disclosed in Patent Document 1 and Patent Document 2, a wire mesh electrode plate is used, but this wire mesh electrode plate is relatively higher in manufacturing cost than a flat plate electrode plate. In addition, because of the wire net shape, it takes time to scrape off when the ink pigment adheres.

  The present invention has been devised in view of such problems, and has a simple configuration, in which an ink pigment can be easily removed in a short time, and a waste liquid can be continuously regenerated. An object of the present invention is to provide a waste liquid recycling apparatus and a waste liquid recycling method.

The waste liquid regenerating apparatus for a printing press according to the present invention according to claim 1 is a waste liquid regenerating apparatus for regenerating a waste liquid containing a charged ink pigment, conductive water, and an insulating cleaning liquid used in the printing machine, A waste liquid regeneration container whose inner surface is covered with an insulator and which regenerates the waste liquid, and a plurality of flat plates whose surfaces are covered with an insulator and which are vertically disposed so as to face each other with a gap therebetween A plurality of plate-like earth electrode plates disposed in the waste liquid recycling container so as to face each other at a predetermined interval and so as to be detachable upward, A high-voltage power supply for applying a voltage to the metal electrode plate ; the waste liquid regeneration container is divided into a plurality of treatment tanks by the plurality of metal electrode plates; Provided in each of the tanks, among the plurality of processing tanks Supplying the waste liquid to the treatment tank on one side and supplying the regenerated liquid, which is a washing liquid regenerated while flowing over the metal electrode plate toward the other treatment tank farthest from the one treatment tank, on the other side It is characterized by having comprised so that it may collect | recover from the processing tank .

A waste liquid recycling apparatus for a printing press according to a second aspect of the present invention is the apparatus according to the first aspect , wherein the earth electrode plate is provided so as to protrude upward from the metal electrode plate, and both left and right edges of the earth electrode plate. And a predetermined gap is formed between the lower edge of the ground electrode plate and the bottom surface of the waste liquid regeneration container.
A waste liquid recycling apparatus for a printing press according to a third aspect of the present invention is the apparatus according to claim 1 or 2 , wherein the waste liquid recycling container has an outer wall on the other processing tank side, from the processing tank on the other side. A regenerative liquid recovery tank for recovering the overflow regenerated liquid is provided.

A waste liquid recycling apparatus for a printing press according to a fourth aspect of the present invention is the apparatus according to any one of the first to third aspects, wherein the waste liquid recycling apparatus projects from the bottom surface of the waste liquid recycling container and is covered with an insulator. And a support base for supporting the metal electrode plate from below, and the support base is formed with a communication hole for communicating the plurality of treatment tanks.
A waste liquid recycling apparatus for a printing press according to a fifth aspect of the present invention is the apparatus according to claim 4 , wherein the waste liquid recycling apparatus is provided at the bottom of the waste liquid recycling container, and discharges water settled in the waste liquid recycling container to the outside. Obtained by a discharge pipe, a valve interposed in the discharge pipe for adjusting the amount of water flowing through the discharge pipe, a water level detection means for detecting the water level in the waste liquid regeneration container, and the water level detection means And control means for controlling opening and closing of the valve based on the detected information.

Waste reproducing apparatus for a printing press of the present invention of claim 6 is the apparatus of claim 5, wherein the regenerant tank to keep storing the regenerant, a regenerant in the regeneration liquid collection tank to the regeneration solution tank A regeneration solution discharge pipe for discharging, a regeneration solution discharge valve for adjusting the amount of the regeneration solution that flows through the regeneration solution discharge pipe, and is disposed in the regeneration solution recovery tank. Regenerating liquid level detecting means for detecting the water level of the regenerating liquid, and the control means controls the regenerating liquid discharge valve based on the detection information obtained by the regenerating liquid water level detecting means. Yes.

Waste reproducing apparatus for a printing press of the present invention according to claim 7 provides the device according to claim 5 or 6, wherein the waste liquid tank to keep storing the waste liquid, waste liquid waste liquid tank to the waste liquid regeneration vessel A waste liquid supply pipe, a supply pump interposed in the waste liquid supply pipe for adjusting the amount of the waste liquid flowing through the waste liquid supply pipe, and the control means include detection information obtained by the water level detection means The supply pump is controlled based on the above.

The waste liquid recycling method for a printing press according to the present invention described in claim 8 is a waste liquid recycling container for covering the inner surface with an insulator and regenerating the waste liquid, and a surface covered with an insulator, and the waste liquid recycling container is spaced apart from each other. A plurality of plate-like metal electrode plates arranged vertically so as to face each other with a gap therebetween, and extracted upward in the waste liquid recycling container so as to face each other at a predetermined interval from the metal electrode plates. A charged ink pigment used in a printing machine using a waste liquid regenerating apparatus comprising a plurality of flat earth electrode plates arranged in a possible manner and a high voltage power source for applying a voltage to the metal electrode plates; A waste liquid regeneration method for regenerating a waste liquid containing conductive water and an insulating cleaning liquid, wherein an electrostatic field is formed between the ground electrode and the metal electrode plate to which a voltage is applied by the high voltage power source. The electrostatic liquid is used to remove the waste liquid from the ink pigment, the water, and the cleaning liquid. Separating the ground electrode plate from the waste liquid regeneration container, scraping and collecting the ground electrode plate outside the waste liquid regeneration container, and recovering the water and the cleaning liquid in the waste liquid regeneration container, respectively. The waste liquid regeneration container is divided into a plurality of treatment tanks by the plurality of metal electrode plates, and the ground electrode plate is provided in each of the plurality of treatment tanks. The waste liquid is supplied to a treatment tank on one side, and a regenerated liquid that is a washing liquid regenerated while flowing over the metal electrode plate toward the other treatment tank farthest from the one treatment tank is returned to the other treatment tank. It collects from the processing tank of the side .

According to a ninth aspect of the present invention, in the method of the eighth aspect of the present invention, the recovered water and the cleaning liquid are reused.

According to waste reproducing method according to claim 1 waste reproducing apparatus for a printing press of the present invention as set forth and claim 8 the invention described, a voltage is applied to the metal electrode plate to generate electrostatic field in the effluent, electrostatic By causing the ink pigment to adhere to the ground electrode plate by agglomeration and allowing the water to settle, the ink pigment, water, and the cleaning liquid can be separated to regenerate the waste liquid. The ink pigment adhering to the earth electrode plate can be recovered by removing the earth electrode plate upward from the waste liquid regeneration container and scraping it outside the waste liquid regeneration container. Furthermore, since the earth electrode plate is flat, it is possible to scrape the ink pigment easily and in a short time as compared with the wire mesh. Therefore, even during the waste liquid regeneration process (that is, during operation of the waste liquid regeneration apparatus), the earth electrode plate can be easily removed in a short time to recover the ink pigment and return the ground electrode plate to the waste liquid regeneration container. Therefore, the waste liquid regeneration process can be continuously performed without stopping the waste liquid regeneration process.

Furthermore, a flat earth electrode plate is relatively cheaper to manufacture than a wire mesh, and it is not necessary to provide a complicated device such as a conventional winding device, thereby reducing the device cost. Is possible.
Thus, with a simple configuration, the waste liquid can be regenerated continuously so that the ink pigment can be collected easily and in a short time.

In addition , since the regeneration process is sequentially performed in each treatment tank, the waste liquid can be reliably regenerated.
According to the waste liquid recycling apparatus for a printing press according to claim 2 , since the waste liquid inevitably flows along the ground electrode plate in the treatment tank, the ink pigment can be efficiently attached to the front and back surfaces of the ground electrode plate. It becomes possible.

According to the waste liquid recycling apparatus for a printing press according to claim 3 , the recycled liquid can be collected with a simple configuration.
According to the waste liquid recycling apparatus for a printing press according to the fourth aspect, the water level settled at the bottom of each processing tank can be made equal between the processing tanks. Thereby, the dispersion | variation in the water level of each processing tank can be prevented.

According to the waste liquid recycling apparatus for a printing press according to claim 5, the amount of water discharged from the waste liquid recycling container to the outside can be automatically controlled.
According to the waste liquid recycling apparatus for a printing press according to the sixth aspect, the amount of the regeneration liquid discharged from the regeneration liquid recovery tank to the regeneration liquid tank can be automatically controlled.
According to the waste liquid recycling apparatus for a printing press according to claim 7, the amount of waste liquid supplied from the waste liquid tank to the waste liquid recycling container can be automatically controlled.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are diagrams for explaining a waste liquid recycling apparatus for a printing press according to an embodiment of the present invention. FIG. 1 is a schematic cross-sectional view of the waste liquid recycling container as viewed from the side. FIG. 3 is a schematic top view of the waste liquid recycling container.
This waste liquid reclaiming device is a device that regenerates the waste liquid that is generated when cleaning the components of the printing press, such as the blanket cylinder of the printing press. In particular, the charged ink pigment, the insulating cleaning liquid, and the conductive In a system in which three components of water are mixed, the three components are separated by a single device.

  As shown in FIGS. 1 and 2, the present waste liquid regenerating apparatus includes a waste liquid regenerating container 1 for regenerating the waste liquid, and a plurality (three in this case) of flat plates disposed vertically in the waste liquid regenerating container 1. Metal electrode plates 2a, 2b, 2c, and a plurality of (three in this case) vertically disposed so as to face each other with a predetermined distance from the metal electrode plates 2a, 2b, 2c in the waste liquid recycling container 1 Plate-like earth electrode plates 3a, 3b, 3c and a high voltage power source 4 for applying a voltage to the metal electrode plates 2a, 2b, 2c.

The metal electrode plates 2a, 2b, 2c and the earth electrode plates 3a, 3b, 3c are made of, for example, copper plates, and the surfaces of the metal electrode plates 2a, 2b, 2c and the earth electrode plates 3a, 3b, 3c are insulators such as vinyl ( (Not shown).
Further, a high voltage of about 5 kV to 10 kV is applied to the metal electrode plates 2a, 2b, 2c from the high voltage power source 4 through the lead wire 5, respectively. In the present embodiment, the applied voltage is set to 5 kV. The ground electrode plates 3 a, 3 b and 3 c are grounded through the conducting wire 6. These conducting wires 5 and 6 are also covered with an insulator (not shown) such as vinyl.

The waste liquid recycling container 1 is composed of a container body 1a whose upper part is open and an insulator 1b such as rubber or plastic covering the inner surface of the container body 1a. In addition, in order to form later-described grooves 12a, 12b, 12c, 13a, 13b, and 13c in the insulator 1b, it is preferable to form the insulator 1b with a material that is easily thickened.
The interior of the waste liquid recycling container 1 is made up of a first processing tank (first processing tank) 10a, a second processing tank (second processing tank) 10b, and a third processing tank (third processing tank) by metal electrode plates 2a and 2b. The tank is divided into three electrolytic treatment tanks 10c, and ground electrode plates 3a, 3b, and 3c are disposed in the first treatment tank 10a, the second treatment tank 10b, and the third treatment tank 10c, respectively. Yes. Here, the positions of the metal electrode plates 2a and 2b are set so that the volume in the processing tank increases in the order of the first processing tank 10a, the second processing tank 10b, and the third processing tank 10c. The metal electrode plate 2c is disposed on the inner wall of the waste liquid regeneration container 1 on the third treatment tank 10c side.

  In the present waste liquid regenerating apparatus, when the waste liquid is regenerated in the waste liquid regeneration container 1, the waste liquid is supplied to the first processing tank (one processing tank) 10a, and the third processing farthest from the first processing tank 10a is performed. A regenerated liquid, which is a cleaning liquid that flows and regenerates while passing over the upper edge portions 14a and 14b of the metal electrode plates 2a and 2b toward the tank (the other processing tank) 10c, is recovered from the third processing tank 10c. Yes. The upper edge 15 on the third processing tank 10c side (waste liquid recovery side) of the waste liquid recycling container 1 is formed lower than the upper edge 16 on the first processing tank 10a side (waste liquid supply side), and the waste liquid A recovery tank (regeneration liquid recovery tank) 8 for recovering the regenerated liquid is provided on the outer wall 7 on the third processing tank 10c side of the regenerative container 1, and the recovery overflowed from the third processing tank 10c by the recovery tank 8 The liquid is collected.

  In addition, a regeneration liquid tank 9 for storing the regeneration liquid is provided at a position below the recovery tank 8, and a discharge hole (regeneration port) formed in the bottom of the recovery tank 8 is provided in the recovery tank 8. Liquid discharge hole) 8a, a discharge pipe (regeneration liquid discharge pipe) 9a connected to the discharge hole 8a for discharging the regenerated liquid in the recovery tank 8 to the regenerative liquid tank 9, and a discharge pipe interposed in the discharge pipe 9a A valve (regeneration liquid discharge valve) 9b for adjusting the amount of the regeneration liquid flowing through 9a is provided. Thereby, the flow rate of the regenerated liquid in the discharge pipe 9a can be increased or decreased by controlling the opening degree of the valve 9b.

  Supporting bases 11a, 11b, and 11c for supporting the metal electrode plates 2a, 2b, and 2c from below are projected from the bottom of the waste liquid recycling container 1. The support bases 11a, 11b, and 11c are covered with an insulator (not shown) and formed in a strip shape at a predetermined height and across the width direction of the waste liquid recycling container 1 (the direction perpendicular to the paper surface in FIG. 1). Has been. In addition, communication holes 17a and 17b for communicating the first processing tank 10a, the second processing tank 10b, and the third processing tank 10c are formed below the support bases 11a and 11b, respectively. Thereby, the water level which settled at the bottom part of each processing tank 10a, 10b, 10c can be made equal between processing tanks, and the dispersion | variation in the water level in each processing tank 10a, 10b, 10c can be prevented. .

  Further, the waste liquid regeneration container 1 includes a discharge hole 18 formed at the bottom of the waste liquid regeneration container 1, and a discharge pipe 18a for discharging water that is connected to the discharge hole 18 and settles in the waste liquid regeneration container 1 to the outside. And a valve 18b that is interposed in the discharge pipe 18a and adjusts the amount of water flowing through the discharge pipe 18a. Thereby, the flow volume of the water in the discharge pipe 18a can be increased / decreased by controlling the opening degree of the valve 18b.

  On the inner wall of the waste liquid recycling container 1, that is, the inner wall of the insulator 1b, slit-shaped grooves 12a, 12b, 12c that engage with the left and right edges of the metal electrode plates 2a, 2b, 2c, and the ground electrode plates 3a, 3b. , 3c and slit-shaped grooves 13a, 13b, 13c that are engaged with the left and right side edges. Thus, when the metal electrode plates 2a, 2b, 2c and the ground electrode plates 3a, 3b, 3c are set in the waste liquid regeneration container 1, the metal electrode plates 2a, 2b, 2c are placed in the grooves 12a, 12b, 12c. The ground electrode plates 3a, 3b, 3c can be stably fixed in the waste liquid regeneration container 1 by sliding them into the grooves 13a, 13b, 13c, respectively. It can also be extracted.

  The groove portions 13a, 13b, and 13c are formed from the upper surface of the waste liquid regeneration container 1 to the positions of the upper surfaces of the support bases 11a and 11b. Therefore, when the ground electrode plates 3a, 3b, 3c are slid and inserted into the grooves 13a, 13b, 13c, the lower edges 21a, 21b, 21c of the ground electrode plates 3a, 3b, 3c and the waste liquid regeneration container 1 are inserted. A predetermined gap having a height substantially equal to that of the support bases 11a and 11b is formed between the bottom surface 20 and the bottom surface 20.

  Further, when the metal electrode plates 2a, 2b, 2c are mounted in the waste liquid regeneration container 1, the upper edges 14a, 14b, 14c of the metal electrode plates 2a, 2b, 2c are the first treatment tank of the waste liquid regeneration container 1. The vertical lengths of the metal electrode plates 2a, 2b, 2c are set so as to be lower than the upper edge 16 on the 10a side. When the ground electrode plates 3a, 3b, 3c are mounted in the waste liquid recycling container 1, the upper edge portions 22a, 22b, 22c of the ground electrode plates 3a, 3b, 3c are the metal electrode plates 2a, 2b, 2c. The vertical lengths of the ground electrode plates 3a, 3b, 3c are set so as to be higher than the upper edge portions 14a, 14b, 14c.

  Further, in the present waste liquid regenerating apparatus, a waste liquid tank 23 for storing the waste liquid generated when cleaning the components of the printing press and the waste liquid in the waste liquid tank 23 are supplied to the first treatment tank 10a of the waste liquid recycling container 1. Supply pipe (waste liquid supply pipe) 23a and a supply pump 23b for adjusting the amount of waste liquid interposed in the supply pipe 23a and flowing through the supply pipe 23a. Thereby, the flow rate of the waste liquid in the supply pipe 23a can be increased / decreased by controlling the discharge amount of the supply pump 23b.

  Further, in the present waste liquid regenerating apparatus, the first water level sensor 24 and the second water level sensor 25 as water level detecting means for detecting the water level in the waste liquid regenerating container 1, and the water level of the regenerated liquid in the recovery tank 8 are detected. A third water level sensor 26 as a regenerating liquid water level detecting means and a computer 27 as a control means are provided. In addition, the 1st water level sensor 24 and the 2nd water level sensor 25 are well-known electrostatic capacitance type level sensors, for example, can distinguish between water and waste liquid, and can detect the water level only of water.

  Both the first water level sensor 24 and the second water level sensor 25 are attached to the side of the support base 11c facing the third treatment tank 10c, and among these, the first water level sensor 24 is connected to the communication holes 17a of the support bases 11a and 11b. The second water level sensor 25 is fixed at a position above the first water level sensor 24, and is fixed at a position above 17b. Further, detection information obtained by the first water level sensor 24 and the second water level sensor 25 is transmitted to the computer 27.

  When the waste liquid is supplied to the waste liquid regeneration container 1 to perform the waste liquid regeneration process, the waste liquid is normally continuously supplied to the waste liquid regeneration container 1 by the supply pump 23b with the valves 18b and 9b closed. However, when water is not detected by the first water level sensor 24 and the second water level sensor 25 during the regeneration process (that is, the water level in the waste liquid regeneration container 1 is determined by the first water level sensor 24). When the position is lower than the position), the computer 27 controls the supply pump 23b so as to increase the amount of waste liquid supplied into the waste liquid regeneration container 1. Further, when water is detected by the first water level sensor 24 and water is not detected by the second water level sensor 25 (that is, the water level in the waste liquid regeneration container 1 is the position of the first water level sensor 24 and the second water level). In the case of being between the position of the sensor 25), the computer 27 controls the supply pump 23b so as to maintain the current supply amount of the waste liquid supplied into the waste liquid regeneration container 1. Furthermore, when water is detected by the first water level sensor 24 and the second water level sensor 25 (that is, when the water level in the waste liquid regeneration container 1 is higher than the position of the second water level sensor 25), the computer No. 27 controls the valve 18b in the opening direction to discharge the water settled in the waste liquid regeneration container 1 to the outside. Further, when the valve 18b is opened to discharge the water in the waste liquid regeneration container 1 to the outside and the water level in the waste liquid regeneration container 1 becomes lower than the second water level sensor 25, the valve 18b is closed. It has become.

The third water level sensor 26 is fixed to the inner wall of the recovery tank 8 and lower than the upper edge 15 on the third treatment tank 10 c side of the waste liquid regeneration container 1, and is obtained by the third water level sensor 26. The detection information is transmitted to the computer 27.
In the computer 27, when the regenerated liquid is detected by the third water level sensor 26 (that is, the water level of the regenerated liquid in the recovery tank 8 becomes higher than the upper edge 15 on the third treatment tank 10 c side of the waste liquid regenerating container 1. In this case, the valve 9b is controlled in the opening direction so that the regenerated liquid accumulated in the recovery tank 8 is discharged to the regenerated liquid tank. Further, when the regenerated liquid is not detected by the third water level sensor 26 (that is, when the water level of the regenerated liquid in the recovery tank 8 is lower than the upper edge 15 on the third treatment tank 10c side of the waste liquid regenerating container 1). The regenerating liquid is stored in the collection tank 8 by controlling the valve 9b in the closing direction.

  Further, an input device (input means) 28 such as a keyboard and a mouse is connected to the computer 27 so that the computer 27 can be instructed to start or end the waste liquid regeneration process via the input device 28. It has become. For example, when the input device 28 instructs the start of the regeneration process, the computer 27 operates the supply pump 23b to supply the waste liquid in the waste liquid tank 23 to the first treatment tank 10a through the supply pipe 23a, and the voltage from the high voltage power source 4 is supplied. Start application. When the end of the regeneration process is instructed by the input device 28, the computer 27 stops the supply pump 23b to stop the supply of the waste liquid and stops the voltage application by the high voltage power source 4.

Since the waste liquid recycling apparatus for a printing press according to an embodiment of the present invention is configured as described above, the waste liquid can be recycled using the waste liquid recycling apparatus as described below.
As shown in FIG. 3, after the metal electrode plates 2a, 2b, 2c and the ground electrode plates 3a, 3b, 3c are set in the waste liquid regeneration container 1, first, the water 32 for grounding is first placed in the waste liquid regeneration container 1 in advance. Put in. The amount of the water 32 is preferably set so that at least the water level is above the communication holes 17a and 17b of the support bases 11a and 11b. Further, it is more preferable that the water level of the water 32 is above the position of the first water level sensor 24. At this time, the valves 18b and 9b are closed.

  Next, as shown in FIG. 4, when the start of the regeneration process is instructed via the input device 28, the supply pump 23b is operated by the computer 27, and the waste liquid 30 stored in the waste liquid tank 23 passes through the supply pipe 23a. It is supplied into the processing tank 10a. Since the waste liquid 30 supplied to the first treatment tank 10a does not mix with the water 32 previously placed in the bottom of the waste liquid regeneration container 1, the second treatment tank passes through the communication holes 17a and 17b of the support bases 11a and 11b. 10b and the 3rd processing tank 10c do not flow, but fill the inside of the 1st processing tank 10a gradually. The ink pigment 31 and the water 32 in the waste liquid 30 are electrostatically aggregated by the electrostatic field generated by the metal electrode plate 2a and the earth electrode plate 3a, and the ink pigment 31 adheres to the earth electrode plate 3a, while the water 32 is It settles at the bottom of the waste liquid regeneration container 1. In this way, the waste liquid 30 can be regenerated by separating the ink pigment 31, water 32, and cleaning liquid 33 in the waste liquid 30. The ink pigment 31 slightly adheres to the surface of the water 32 that has settled at the bottom of the waste liquid recycling container 1.

  Further, when the waste liquid 30 is further supplied to the first treatment tank 10a, the waste liquid 30 in the first treatment tank 10a becomes full, and the waste liquid 30 in the first treatment tank 10a has a lower edge portion of the ground electrode plate 3a. It flows between 21a and the surface 34 of the settled water 32 so as to follow the front and back surfaces of the ground electrode plate 3a, and flows into the second treatment tank 10b beyond the upper edge portion 14a of the metal electrode plate 2a. Thus, since the waste liquid 30 necessarily flows along the ground electrode plate 3a, the ink pigment 31 can be efficiently attached to the front and back surfaces of the ground electrode plate 3a.

The ink pigment 31 and the water 32 in the waste liquid 30 flowing into the second treatment tank 10b are electrostatically aggregated by an electrostatic field generated by the metal electrode plates 2a and 2b and the ground electrode plate 3b, and are regenerated in the first treatment tank 10a. Similar to the treatment, the ink pigment 31 adheres to the ground electrode plate 3 b, while the water 32 settles at the bottom of the waste liquid regeneration container 1.
When the waste liquid is further supplied to the first treatment tank 10a, the waste liquid 30 in the second treatment tank 10b becomes full, and the waste liquid 30 in the second treatment tank 10b is filled with the lower edge 21b of the ground electrode plate 3b. And flows along the front and back surfaces of the ground electrode plate 3b through the surface 34 of the settled water 32, and flows into the third treatment tank 10c beyond the upper edge 14b of the metal electrode plate 2b.

The ink pigment 31 and the water 32 in the waste liquid 30 flowing into the third treatment tank 10c are electrostatically aggregated by an electrostatic field generated by the metal electrode plates 2b and 2c and the earth electrode plate 3c, and the first treatment tank 10a and the first treatment tank 10c are discharged. Similar to the regeneration process in the two-treatment tank 10b, the ink pigment 31 adheres to the ground electrode plate 3c, while the water 32 settles at the bottom of the waste liquid regeneration container 1.
Then, as shown in FIG. 5, when the waste liquid 30 is further supplied to the first treatment tank 10a, the waste liquid 30 in the third treatment tank 10c becomes full, and the waste liquid 30 in the third treatment tank 10c It flows between the lower edge 21c of the plate 3c and the surface 34 of the settled water 32 so as to follow the front and back surfaces of the ground electrode plate 3c, and the upper edge on the third treatment tank 10c side of the waste liquid regeneration container 1 15 and the upper edge 14c of the metal electrode plate 2a are recovered in the recovery tank 8.

Thus, the waste liquid 30 supplied to the first treatment tank 10a is first regenerated in the first treatment tank 10a to separate the ink pigment 31, the water 32, and the cleaning liquid 33, and the second treatment tank and the third treatment tank 10a. Since the regeneration process is further performed in the processing tank, the waste liquid 30 is reliably regenerated, and only the regenerated liquid 33, which is a regenerated cleaning liquid with high purity, is recovered in the recovery tank.
Further, when the regeneration liquid 33 in the recovery tank 8 is full, the third water level sensor 26 provided in the recovery tank 8 detects the regeneration liquid 33, and the computer 27 is based on the information from the third water level sensor 26. The valve 9 b is opened and the regenerated liquid 33 in the collection tank 8 is discharged to the regenerated liquid tank 9. Further, when the regenerative liquid 33 in the recovery tank 8 is discharged to the regenerative liquid tank 9 and the regenerative liquid 33 in the recovery tank 8 decreases, the third water level sensor 26 does not detect the regenerative liquid 33. Is closed and the regenerated liquid 33 is stored in the collection tank 8.

During such a regeneration process, the computer 27 supplies the water 32 settling at the bottom of the waste liquid regeneration container 1 so that the water level is located between the first water level sensor 24 and the second water level sensor 25. The amount of the waste liquid 30 supplied to the first treatment tank 10a is adjusted by controlling the pump 23b.
Further, when the regeneration process is continued, the amount of water 32 that settles at the bottom of the waste liquid regeneration container 1 increases. When the water level of the water 32 becomes higher than the position of the second water level sensor 25, the second water level sensor. 25 detects the water 32, and the computer 27 opens the valve 18b based on the detection information from the second sensor 25, and discharges the water 32 settled on the bottom of the waste liquid regeneration container 1 to the outside. Further, when the water 32 in the waste liquid regeneration container 1 is discharged to the outside and the water 32 in the waste liquid regeneration container 1 decreases, the second water level sensor 25 does not detect the water 32, so the computer 27 closes the valve 18b.

  Furthermore, when the water level of the water 32 settled on the bottom of the waste liquid regeneration container 1 becomes lower than the position of the first water level sensor 24, the first water level sensor 24 will not detect the water 32, so the computer 27 turns off the supply pump 23b. The supply amount of the waste liquid 30 to be controlled and supplied into the first treatment tank 10a is increased.

  Further, if the regeneration process is continued, the amount of the ink pigment 31 adhering to the ground electrode plates 3a, 3b, 3c also increases, but the ground electrode plates 3a, 3b, 3c can be extracted above the waste liquid regeneration container 1. Therefore, the ground electrode plates 3a, 3b, and 3c are appropriately removed from the waste liquid regeneration container 1, and the ink pigment 31 attached to the ground electrode plates 3a, 3b, and 3c is scraped and collected outside the waste liquid regeneration container 1. it can. Furthermore, since the earth electrode plates 3a, 3b, 3c are formed in a flat plate shape, the ink pigment 31 can be scraped off easily and in a short time compared to the metal mesh plate. Therefore, even during the regeneration process (that is, during operation of the waste liquid recycling apparatus), the earth electrode plates 3a, 3b, 3c are removed easily and in a short time, and the ink pigment 31 is collected to collect the ground electrode plates 3a, 3b. , 3c can be returned to the waste liquid regeneration container 1, so that the regeneration process can be continuously performed without stopping the regeneration process. Furthermore, the flat earth electrode plates 3a, 3b, and 3c are relatively inexpensive to manufacture compared to the wire mesh type, and it is not necessary to provide a complicated device such as a conventional winding device. Costs can be reduced.

Since the metal electrode plates 2a, 2b, 2c can also be extracted above the waste liquid regeneration container 1, the metal electrode plates 2a, 2b, 2c are appropriately extracted from the waste liquid regeneration container 1, and the metal electrode is disposed outside the waste liquid regeneration container 1. Of course, maintenance of the plates 2a, 2b and 2c is also possible.
When stopping the regeneration process, the computer 27 stops the supply pump 23b by stopping the supply pump 23b by instructing the end of the regeneration process by the input device 28, and also stops the voltage application by the high voltage power source 4. To do.

  As described above, according to the present waste liquid recycling apparatus and method, the ink pigment 31 can be collected easily and in a short time with a simple configuration, and the waste liquid 30 can be continuously regenerated. Further, the supply of the waste liquid 30, the discharge of the water 32 settled in the waste liquid regeneration container 1, and the discharge of the regeneration liquid 33 from the recovery tank 8 to the regeneration liquid tank 9 can be performed automatically.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in this embodiment, the waste liquid regeneration container 1 is divided into three treatment tanks 10a, 10b, and 10c, and the waste liquid 30 is regenerated in order in each of the treatment tanks 10a, 10b, and 10c. The container 1 may be provided with one metal electrode plate and one earth electrode plate so that the waste liquid 30 is regenerated at a time. Alternatively, the number of metal electrode plates and ground electrode plates may be further increased to provide four or more treatment tanks in the waste liquid regeneration container 1.

  Further, when starting the regeneration process, the waste liquid 30 is simultaneously supplied to the first processing tank 10a, the second processing tank 10b, and the third processing tank 10c to fill the processing tanks 10a, 10b, and 10c for a predetermined time. After applying the voltage and confirming that the ink pigment 31, water 32, and cleaning liquid 33 are sufficiently separated in each of the processing tanks 10a, 10b, and 10c, the supply of the waste liquid 30 to the first processing tank 10a is started as usual. It may be.

In this embodiment, the voltage applied by the high voltage power supply 4 is constant (5 kV). However, the applied voltage is changed in accordance with, for example, the volume of the waste liquid regeneration container 1 or the flow rate of the waste liquid flowing in the waste liquid regeneration container 1. You may do it. Further, different voltages may be applied to the respective metal electrode plates 2a, 2b, 2c.
Moreover, although the 1st water level sensor 24 and the 2nd water level sensor 25 were attached to the support stand 11c in this embodiment, you may attach to the support stand 11a or the support stand 11b instead of the support stand 11c.

  Furthermore, in this embodiment, the communication holes 17a and 17b are provided in the support bases 11a and 11b, respectively. However, the communication holes 17a and 17b do not need to be provided. However, in this case, the first water level sensor 24 and the second water level sensor 25 are provided in each of the treatment tanks 10a, 10b, and 10c in order to detect the water level of the water 32 that has settled at the bottom of each of the treatment tanks 10a, 10b, and 10c. In addition, it is preferable to provide a discharge hole 18, a discharge pipe 18a, and a valve 18b at the bottom of each treatment tank 10a, 10b, 10c. When the communication holes 17a and 17b are not provided as described above, it is not necessary to put the water 32 in the waste liquid regeneration container 1 in advance.

  The metal electrode plate 2c need not be provided, but if this metal electrode plate 2c is provided, a stronger electrostatic field can be generated in the third treatment tank 10c, and the ink pigment 31, water 32, cleaning liquid can be generated. There is an advantage that the separation of 33 can be performed more efficiently.

It is a figure which shows the waste liquid reproduction | regeneration apparatus of the printing press concerning one Embodiment of this invention, Comprising: It is typical sectional drawing seen from the side surface direction of the waste liquid reproduction | regeneration container. It is a figure which shows the waste liquid reproduction | regeneration apparatus of the printing press concerning one Embodiment of this invention, Comprising: It is a typical top view of the waste liquid reproduction | regeneration container. It is a figure which shows the waste liquid reproduction | regeneration apparatus of the printing press concerning one Embodiment of this invention, Comprising: It is typical sectional drawing seen from the side surface direction of the waste liquid reproduction | regeneration container. It is a figure which shows the waste liquid reproduction | regeneration apparatus of the printing press concerning one Embodiment of this invention, Comprising: It is typical sectional drawing seen from the side surface direction of the waste liquid reproduction | regeneration container. It is a figure which shows the waste liquid reproduction | regeneration apparatus of the printing press concerning one Embodiment of this invention, Comprising: It is typical sectional drawing seen from the side surface direction of the waste liquid reproduction | regeneration container. It is a figure which shows the waste-liquid reproduction | regeneration apparatus of the conventional printing press, Comprising: It is typical sectional drawing seen from the side surface direction of the waste-liquid reproduction | regeneration container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste liquid reproduction | regeneration container 1a Container main body 1b Insulator 2a, 2b, 2c Metal electrode plate 3a, 3b, 3c Ground electrode board 4 High voltage power supply 5,6 Conductor 7 Outer wall of 3rd processing tank side of waste liquid reproduction container 8 Collection tank ( Reclaimed liquid recovery tank)
8a Discharge hole (regeneration liquid discharge hole)
9 Reclaimed liquid tank 9a Discharge pipe (Reclaimed liquid discharge pipe)
9b Valve (regeneration liquid discharge valve)
10a First treatment tank (first treatment tank)
10b Second treatment tank (second treatment tank)
10c 3rd processing tank (3rd processing tank)
11a, 11b, 11c Support bases 12a, 12b, 12c, 13a, 13b, 13c Groove parts 14a, 14b, 14c Upper edge part of metal electrode plate 15 Upper edge part of waste liquid regeneration container on third treatment tank side 16 of waste liquid regeneration container Upper edge 17a, 17b on the first processing tank side Communication hole 18 Discharge hole 18a Discharge pipe 18b Valve 20 Bottom face of waste liquid recycling container 22a, 22b, 22c Upper edge part of ground electrode plate 23 Waste liquid tank 23a Supply pipe (waste liquid supply pipe) )
23b Supply pump 24 1st water level sensor (water level detection means)
25 Second water level sensor (water level detection means)
26 Third water level sensor (regeneration liquid water level detection means)
27 Computer (control means)
28 Input device (input means)
30 Waste liquid 31 Ink pigment 32 Water 33 Cleaning liquid (regeneration liquid)
34 Water surface

Claims (9)

A waste liquid recycling device that regenerates waste liquid containing charged ink pigment, conductive water, and insulating cleaning liquid used in a printing machine,
A waste liquid regeneration container whose inner surface is covered with an insulator and regenerates the waste liquid;
A plurality of plate-like metal electrode plates, the surfaces of which are covered with an insulator and arranged vertically so as to face each other with a gap in the waste liquid regeneration container;
A plurality of plate-like earth electrode plates disposed in the waste liquid regeneration container so as to face each other at a predetermined interval from the metal electrode plate and detachable upward;
A high voltage power source for applying a voltage to the metal electrode plate ;
The waste liquid regeneration container is divided into a plurality of treatment tanks by the plurality of metal electrode plates, and the ground electrode plate is provided in each of the plurality of treatment tanks,
The waste liquid is supplied to a treatment tank on one side of the plurality of treatment tanks, and is regenerated by flowing over the metal electrode plate toward the other treatment tank farthest from the one treatment tank. A waste liquid recycling apparatus for a printing press , wherein the recycling liquid is recovered from the processing tank on the other side . The ground electrode plate is provided so as to protrude upward from the metal electrode plate, and both right and left side edges of the ground electrode plate are in contact with the inner wall of the waste liquid regeneration container, and a lower side edge of the ground electrode plate wherein the predetermined gap is formed between the bottom surface of the waste liquid regeneration vessel, waste reproducing apparatus for a printing press according to claim 1, wherein. The outer wall of the other side of the processing tank side of the waste liquid regeneration vessel, characterized in that the regeneration liquid collection tank for collecting the regeneration liquid overflowing from the other side of the processing tank is provided, according to claim 1 or 2 A waste liquid recycling apparatus for a printing press as described in 1. Protruding on the bottom surface of the waste liquid regeneration container, the surface is covered with an insulator, and a support base for supporting the metal electrode plate from below is provided, and the support base is in communication with the plurality of treatment tanks. The waste liquid recycling apparatus for a printing press according to any one of claims 1 to 3, wherein a hole is formed. A discharge pipe provided at the bottom of the waste liquid regeneration container, for discharging water settled in the waste liquid regeneration container to the outside;
A valve interposed in the discharge pipe for adjusting the amount of water flowing through the discharge pipe;
Water level detection means for detecting the water level in the waste liquid regeneration container;
5. The waste liquid recycling apparatus for a printing press according to claim 4 , further comprising control means for controlling opening and closing of the valve based on detection information obtained by the water level detection means. A regenerating liquid tank for storing the regenerating liquid;
A regeneration liquid discharge pipe for discharging the regeneration liquid in the regeneration liquid recovery tank to the regeneration liquid tank;
A regenerative liquid discharge valve that is interposed in the regenerative liquid discharge pipe and adjusts the amount of the regenerative liquid flowing through the regenerative liquid discharge pipe;
Regenerating liquid level detecting means for detecting the regenerating liquid level in the regenerating liquid recovery tank;
6. The waste liquid regeneration apparatus for a printing press according to claim 5 , wherein the control means controls the regeneration liquid discharge valve based on detection information obtained by the regeneration liquid water level detection means. A waste liquid tank for storing the waste liquid;
A waste liquid supply pipe for supplying the waste liquid in the waste liquid tank to the waste liquid regeneration container;
A supply pump interposed in the waste liquid supply pipe for adjusting the amount of the waste liquid flowing through the waste liquid supply pipe;
The waste liquid recycling apparatus for a printing press according to claim 5 or 6 , wherein the control means controls the supply pump based on detection information obtained by the water level detection means. A waste liquid regeneration container whose inner surface is covered with an insulator and regenerates the waste liquid;
A plurality of plate-like metal electrode plates, the surfaces of which are covered with an insulator and arranged vertically so as to face each other with a gap in the waste liquid regeneration container;
A plurality of plate-like earth electrode plates disposed in the waste liquid regeneration container so as to face each other at a predetermined interval from the metal electrode plate and detachable upward;
Using a waste liquid regenerating device equipped with a high voltage power source that applies voltage to the metal electrode plate, regenerates the waste liquid containing charged ink pigment, conductive water, and insulating cleaning liquid used in the printing press. A waste liquid recycling method comprising:
Forming an electrostatic field between the ground electrode and the metal electrode plate applied with a voltage by the high-voltage power source, and separating the waste liquid into the ink pigment, the water, and the cleaning liquid by the electrostatic field. When,
Extracting the ground electrode plate from the waste liquid regeneration container and scraping and collecting the ground electrode plate outside the waste liquid regeneration container;
Collecting each of the water and the cleaning liquid in the waste liquid regeneration container ,
The waste liquid regeneration container is divided into a plurality of treatment tanks by the plurality of metal electrode plates, and the ground electrode plate is provided in each of the plurality of treatment tanks,
The waste liquid is supplied to a treatment tank on one side of the plurality of treatment tanks, and is regenerated by flowing over the metal electrode plate toward the other treatment tank farthest from the one treatment tank. A waste liquid recycling method for a printing press , wherein the recycling liquid is recovered from the other processing tank . The method of reclaiming waste liquid for a printing press according to claim 8 , wherein the collected water and cleaning liquid are reused.

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