JP2002079259A - Apparatus and method for regenerating waste liquid of printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the productivity of a printing press by reducing the dis posal cost of a washing waste liquid and the running cost required in the wash ing of the printing press by regenerating a washing liquid with high efficiency, in an apparatus and method for regenerating the waste liquid of the printing press. SOLUTION: The waste liquid regeneration apparatus 15, which regenerates the waste liquid containing ink pigment, water and the washing liquid used in the printing press, is equipped with a waste liquid storage container 2 for storing the waste liquid 11, a plurality of the metal electrode plates 30a and 30b parallelly arranged in the waste liquid storage container 2 at a predetermined interval in opposed relationship to permit the waste liquid 11 to flow, the earth electrode plate 20 arranged so as to be opposed to one end of a plurality of the parallelly arranged metal electrode plates 30a and 30b at a predetermined interval and a high voltage power supply 7 for applying voltage across the metal electrode plates 30a and 30b in order to generate an electric field between the mutually opposed electrode plates 30a and 30b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for regenerating waste liquid generated during washing of a printing press component to which ink such as a blanket cylinder of a printing press adheres. Cleaning liquid and conductive water 3
The present invention relates to a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press, in which a single apparatus separates three components in a system in which components are mixed.

[0002]

2. Description of the Related Art Waste liquid is generated when a blanket cylinder or an impression cylinder of a printing press is washed. However, in consideration of the global environment, there is an increasing tendency to subject this waste liquid to some treatment and discard. In this case, the cost for disposal (disposal cost) is increased, and the running cost is increased because a large amount of cleaning liquid is used to clean the blanket cylinder and the like.

Therefore, recently, an attempt has been made to reprocess the waste liquid and reuse the cleaning liquid. One example is a so-called sedimentation method, and FIG. 7 shows a schematic configuration of a waste liquid regenerating apparatus used in the sedimentation method. As shown in FIG.
The conventional waste liquid regenerating apparatus 51 includes a container 53 for storing a cleaning waste liquid (waste liquid) 52, a bottom discharge pipe 54 is connected to a bottom wall of the container 53, and a side discharge pipe 55 is connected to a side wall of the container 53. Is connected. Further, of these discharge pipes 54 and 55, a concentrated waste liquid recovery container 56 is disposed below the outlet of the bottom discharge pipe 54, and a regenerated cleaning liquid recovery container 57 is disposed below the outlet of the side discharge pipe 55. ing. An opening / closing valve 58 is connected to the passage of one bottom discharge pipe 54, and an opening / closing valve 59 is connected upstream of the passage of the other side discharge pipe 55, and a filter 60 is arranged downstream thereof. Has been established.

In the waste liquid regenerating apparatus 51 configured as described above, the waste liquid 52 after cleaning the blanket cylinder and the like of the printing press is used.
Is stored in a container 53 and an ink pigment (also simply referred to as a pigment)
The ink pigment 61 is settled to the bottom of the container 53 by adding a chemical which promotes the settling of the liquid 61 to the waste liquid 52.
Next, the sedimented ink pigment, that is, the concentrated waste liquid 63, is recovered from the bottom discharge pipe 54 into the concentrated waste liquid recovery container 56,
The supernatant of the waste liquid 52 is filtered from the side discharge pipe 55 to the filter 6.
The ink pigment 61 is removed by filtration at 0, and is collected in the regenerated washing liquid collection container 57. The cleaning liquid 62 thus obtained is reused.

However, according to this method, not only the purity of the regenerating cleaning liquid is insufficient, but also the sedimentation of the ink pigment 61 is insufficient depending on the combination of the ink and the cleaning liquid, and the filter 60 is immediately clogged. There is a problem that the filter 60 must be replaced or cleaned frequently. On the other hand, in the field of electrophotography, a wet developing method in which a charged toner dispersed in a solvent is adhered to an electrostatic latent image by electrophoresis to visualize the toner is also partially adopted. In this system, a method of electrically removing charged toner particles from waste liquid after cleaning has also been proposed (Japanese Patent Application Laid-Open No. 53-10440).

A document recently published by the same applicant at a conference (Kuroshima et al .: Transactions of Japan Hardcopy '96, p153 (1996)) discloses a toner particle removing apparatus similar to the apparatus of the present invention.

[0007]

However, according to the prior art disclosed in the above-mentioned gazettes and the technology disclosed in academic conferences, the case where conductive water is mixed is not assumed. For example, in the above conference publications, when water is contained in the recovered carrier liquid, water is separated by using the difference in specific gravity between the carrier liquid and water, but this method requires a large apparatus. In addition, it is inevitable that the separation will take a long time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables the cleaning liquid to be regenerated with high efficiency, thereby reducing the cost of disposing of the cleaning waste liquid and the running cost of cleaning the printing press. It is another object of the present invention to provide a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press, which can improve the productivity of the printing press.

[0009]

In order to achieve the above object, a waste liquid regenerating apparatus for a printing press according to the present invention is provided.
A waste liquid regenerating apparatus for regenerating a waste liquid containing an ink pigment, water, and a washing liquid used in a printing machine, comprising: a waste liquid storage container for storing the waste liquid; a ground electrode disposed in the waste liquid storage container; A metal electrode plate disposed in the waste liquid storage container so as to be opposed to the ground electrode at a predetermined distance and through which the waste liquid can flow, and a high-voltage power supply for applying a voltage to the metal electrode plate. It is characterized by that.

A waste liquid regenerating apparatus for a printing press according to the present invention (claim 2) is a waste liquid regenerating apparatus for regenerating a waste liquid containing an ink pigment, water and a washing liquid used in the printing press, wherein the waste liquid is stored. Waste liquid storage container, a plurality of metal electrode plates arranged side by side in the waste liquid storage container so as to face each other at an interval and through which the waste liquid can flow, and the plurality of metal electrode plates arranged side by side And a high-voltage power supply that applies a voltage to the metal electrode plate in order to generate an electric field between the opposed electrode plates. It is characterized by providing.

It is preferable that the metal electrode plate is a wire mesh metal electrode plate. It is preferable that the voltage applied to the plurality of metal electrode plates increases as the distance from the ground electrode increases (claim 3). The electric field strength generated between the opposing electrode plates is
It is preferable that the distance between the electrodes closer to the ground electrode is set to be larger than the distance between the electrodes far from the ground electrode.

The earth electrode and the plurality of metal electrode plates move the earth electrode from one side to the other side in the waste liquid storage container so as to make the ground electrode closest to one side in the waste liquid storage container. Arranged side by side, supplying the waste liquid to one side in the waste liquid storage container, and collecting the regenerated washing liquid from the other side in the waste liquid storage container farthest from the one side. Preferred (claim 5).

[0013] A blanket cylinder cleaning device for cleaning the blanket cylinder of the printing press is connected, and waste liquid discharged from the blanket cylinder cleaning device is guided to the vicinity of the ground electrode in the waste liquid storage container. It is preferable that the cleaning liquid and the water regenerated in the inside are recovered and supplied to the blanket cylinder cleaning device (claim 6).

It is preferable that a settling portion for settling water separated from the waste liquid is provided below the ground electrode on one side of the waste liquid storage container. In addition, it is preferable to provide a scraping plate for scraping the ink pigment which has aggregated and adhered to the earth electrode and detaching the ink pigment from the earth electrode. The ground electrode is disposed substantially horizontally below the waste liquid storage container, and the metal electrode plate is disposed substantially horizontally above the ground electrode inside the waste liquid storage container, and the metal electrode plate is disposed above the waste liquid storage container. A first recovery hole for recovering the regenerated cleaning liquid is provided, and a second recovery hole for recovering the ink pigment and water separated from the cleaning liquid is provided in a lower portion of the waste liquid storage container. It is also preferable (claim 9).

In this case, a partition wall is disposed near one side wall in the waste liquid storage container, and an area defined by the partition wall and the one side wall is constituted as a waste liquid input section for inputting the waste liquid. Preferably, the metal electrode plate is disposed between the partition wall and the other side wall facing the one side wall in the waste liquid storage container (claim 10). The metal electrode plate is preferably a wire mesh metal electrode plate (claim 11), and the earth electrode is preferably provided so as to be able to be drawn out of the waste liquid storage container (claim 1).
2). The ground electrode is formed of a metal sheet (for example, aluminum foil) that can be wound and wound in a coil shape, is disposed outside the waste liquid storage container, and sends out the metal sheet. A winding device disposed outside the waste liquid storage container and winding up the metal sheet after being sent out from the delivery device and used in the waste liquid storage container. 13).

Further, a roll-shaped thin paper covering the surface of the earth electrode, a delivery device provided outside the waste liquid storage container and sending out the thin paper, and a delivery device provided outside the waste liquid storage container and provided outside the waste liquid storage container And a take-up device for winding the thin paper after being sent out of the waste liquid storage container and used in the waste liquid storage container. The ground electrode is formed of a rotatable cylindrical metal bar, and the metal electrode plate is formed in a cylindrical shape so as to surround the outside of the ground electrode. It is also preferable that a blade for scraping the ink pigment adhered to the outer surface of the metal bar be provided.

It is also preferable that the ground electrode is constituted by a rotatable metal disk, and is provided with a blade for slidingly contacting the metal disk and scraping the ink pigment attached to the outer surface of the metal disk. (Claim 16). Also,
The ground electrode is formed of an endless metal sheet, and a driving device that rotationally drives the endless metal sheet and scrapes the ink pigment adhered to the outer surface of the metal sheet by slidingly contacting the endless metal sheet. It is also preferable that a blade is provided (claim 17).

Further, it is preferable that the ground electrode is made of a conductive projection or a mesh-like metal. In this case, it is preferable to provide an ultrasonic vibrator for vibrating the ground electrode and re-dissolving the ink pigment adhering to the ground electrode in the cleaning liquid.

Further, a waste liquid regenerating method for a printing press according to the present invention (claim 20) is a waste liquid regenerating method for regenerating a waste liquid containing an ink pigment, water and a washing liquid used in the printing press, wherein the waste liquid is contained in the waste liquid. A static electric field is generated, and the water and the ink pigment are electrostatically aggregated from the waste liquid using electrophoresis of the ink pigment by the electrostatic field, and the waste liquid is washed with the cleaning liquid and the water and the ink pigment. It is characterized by being separated into

[0020]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. FIGS. 1 to 6 show a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press as a first embodiment of the present invention, and FIGS. FIG. 3 is a longitudinal sectional view and a transverse sectional view of a waste liquid storage container showing a configuration of the apparatus. FIG. 3 is a schematic diagram illustrating the principle of the present apparatus and the method in the order of (a) to (c).
FIG. 5 is a diagram illustrating the configuration of the present apparatus, FIG. 5 is a system configuration diagram showing a state in which the present apparatus is incorporated in a cleaning apparatus, and FIG. 6 is a view showing an example of a method of removing ink pigment attached to a ground electrode plate in the present apparatus. It is.

First, the principle of waste liquid regeneration of the present waste liquid regeneration apparatus and the present waste liquid regeneration method will be described. The principle of this waste liquid regeneration is that, in the regeneration of the waste liquid 11 containing the three components of the ink pigment 61, the water 9, and the cleaning liquid (insulating) 62, an electrostatic field is generated in the waste liquid 11 so that the ink pigment 61 is electrically discharged in the waste liquid. The water 9 is electrostatically agglomerated together with the electrophoresis to separate the ink pigment 61, the water 9, and the washing liquid 62.

That is, as shown in FIG. 3A, the waste liquid 11 supplied to the container contains water 9 and ink pigment 6.
1 and the cleaning liquid 62 are mixed.
The electrode plates 3 and 4 are installed on one side and the other side, and the electrode plate 3 is grounded to form a ground electrode (here, since the ground electrode is plate-shaped, hereinafter also referred to as a ground electrode plate). When a high voltage is applied to the plate 4, the electrode plate 4 becomes a positive electrode and the electrode plate 3 becomes a negative electrode, and an electric field is generated between the electrode plates 3 and 4. Thus, as shown in FIG. 3B, electrophoresis of the ink pigment 61 in the waste liquid 11 and electrostatic aggregation of the water 9 start, and the water 9 and the ink pigment 61 move and separate, respectively. .

As the reaction in the electric field progresses (that is, the state in which the electrolysis is generated continues for a long time), the water 9 and the ink pigment 61 are completely separated, and as shown in FIG.
The water 9 aggregates in groups and settles to the bottom by gravity. Further, the positively charged ink pigment 61 adheres to the ground electrode plate 3 which is a negative pole. This completely removes water 9 from the cleaning solution 62.
And the ink pigment 61 are separated, and a clean cleaning liquid 62 (that is, the cleaning regenerating liquid 26) is obtained.

FIG. 4 (a) is a schematic diagram further embodying the configuration of the apparatus for regenerating the waste liquid utilizing such a principle. As shown in FIG. 4 (a), the waste liquid storage container ( A plate-like ground electrode plate 20 is installed along one side in one side of the container 2 and a first ground electrode plate 20 is located at a distance A from the ground electrode plate 20 in the container 2.
The electrode plate (hereinafter, also simply referred to as an electrode plate) 30a is disposed in parallel with the ground electrode plate 20, and the second electrode plate 30a is located at a distance B from the electrode plate 30a in the container 2.
Of the applied electrode plate 30b to the ground electrode plate 20 and the electrode plate 30a.
Install in parallel to.

Therefore, the inside of the container 2 contains two electrode plates 30.
a, 30b (indicated by 30 when each electrode plate is not distinguished), a first region (a waste liquid input layer, also referred to as a first layer) from one side thereof to the other side. A second region (a processed layer, also referred to as a second layer) b, and a third region (a processed layer, also referred to as a third layer) c
Of the electrode plates 30a, 30
Since b is a wire mesh metal electrode plate made of a mesh metal plate (for example, a 200 mesh wire mesh), the waste liquid 11 can flow between the regions a, b, and c.

An aggregation electrode plate 20 for aggregating the ink pigment 61 is connected to the earth 8. The electrode plates 30a and 30b have different voltage loads (electrical resistances) 7a and 7a, respectively, so that different voltages can be applied.
It is connected to a high-voltage power supply (hereinafter, simply referred to as a power supply) 7 via 7b. Then, first, a clean cleaning liquid 62 is supplied into the container 2. A high voltage of about 8 kV (kilovolt) is applied to the first applied electrode plate 30a, and a higher voltage is applied to the second applied electrode plate 30b.
A high voltage of about kV is applied.

Thus, in the first region a, the distance between the moving earth electrode plate 20 and the first applying electrode plate 30a is 8 k.
A potential difference of V is generated, and due to this potential difference, the ink pigment 61 in the waste liquid 11 is sucked by the ground electrode plate 20, and the water 9 aggregates and settles to the bottom. However, this first area a
It is difficult to completely separate them only in the inside. On the other hand, the waste liquid 11 in which a part of the ink pigment 61 remains passes through the first application electrode plate 30a of the wire mesh and moves to the second area b. In the second region b, the first applied electrode plate 30a
Since a potential difference of 2 kV is generated between the second applying electrode plate 30b and the second applying electrode plate 30b, a part of the ink pigment 61 remaining in the waste liquid 11 aggregates in the direction of the first applying electrode plate 30a. Ground electrode plate 2 with a larger potential difference from here
Aggregates in the 0 direction.

As a result, all of the ink pigments 61 are aggregated and adsorbed on the ground electrode plate 20, and the water 9 settles on the bottom of the container 2. Then, the water 9 and the ink pigment 61 are collected in the first area a on the right side of the container 2, and only the cleaned cleaning liquid 62 is stored in the third area (processed layer) c on the left side of the container 2. . The cleaning liquid 62 in this area c can be collected and reused.

However, if the voltage gradient (potential difference gradient) is too gentle, the electric field becomes weak, the ink pigment 61 moves to the electrode on the low potential side, and the water 9 aggregates slowly, making it difficult to separate them. Therefore, it is necessary to provide a sufficient potential difference between the electrode plates and not to make the distance between the electrode plates too large. Further, in order to surely coagulate and adsorb the ink pigment 61 to the ground electrode plate 20, it is necessary to clearly increase the electric field (to make the voltage gradient steep) closer to the ground electrode plate 20.

That is, as described above, the two electrode plates 30a,
Assuming that the distance between the electrodes 30b is relatively short, B is 8 kV for the first applied electrode plate 30a and 10 kV for the second applied electrode plate 30b.
Are applied, the first applied electrode plate 30
a and the second applied electrode plate 30b have a potential difference of 2 kV, and have a sufficient voltage gradient as shown by the solid line in FIG. , The separation of the ink pigment 61 and the water 9 can be reliably performed.

However, the other side of the container 2 [the ground electrode plate 2
0 (left end in FIG. 4 (a) opposite to FIG. 4).
0c, for example, 8k is applied to the first applied electrode plate 30a.
V, a voltage of 9 kV is applied to the second applied electrode plate 30b, and a voltage of 10 kV is applied to the third applied electrode plate 30c, the voltage gradient is as shown by the broken line in FIG.
The electric field is weaker and weaker in the third area c, and the electric field in the second area b is stronger than that of the third area c but the difference is smaller. Since the pigment 61 is attracted and the ink pigment 61 moves into the third area c, complete separation cannot be performed.

From this viewpoint, the respective embodiments of the present invention are configured. The waste liquid regenerating apparatus for a printing press according to the first embodiment is configured as shown in FIGS. That is, as shown in FIG. 1 and FIG.
An earth electrode plate 20 for aggregating ink pigment is arranged on one side (right end in FIG. 1) in the container 2. An insulator 21 is interposed between the ground electrode plate 20 and the wall of the container 2.
An upper portion of the ground electrode plate 20 is covered with an insulator 22 to prevent a short circuit from occurring between the ground electrode plate 20 and another electrode plate.

In the container 2, a first applying electrode plate 30 a is provided at a position close to the ground electrode plate 20 to some extent in parallel with the ground electrode plate 20.
Electrode plate 20 and electrode plate 3
A second application electrode plate 30b is provided in parallel with Oa. The electrode plates 30a, 30b are wire mesh metal electrode plates made of, for example, a 200 mesh wire mesh.
The waste liquid 11 can be distributed between the first to third regions a, b, and c partitioned by 0b. Further, the application electrode plate 3
The upper portions of Oa and 30b are also covered with insulators 31a and 31b to prevent short circuit between the electrode plates.

The applied electrode plates 30a and 30b have
The power supply 7 is connected via different voltage loads 7a and 7b so that different voltages are respectively applied. Of course, a sufficiently high voltage is applied to the application electrode plates 30a and 30b, and the second application electrode plate 30b is
A voltage higher than that of the applied electrode plate 30a is applied, and the electric field generated by the application of the voltage is higher in the first region a than in the second region.
Are set so as to be clearly (i.e., with a clear difference) stronger than the region b.

The lower part of the first area a in the container 2 is a tank (sedimentation part) in which the coagulated and separated water 9 is settled.
A collecting hole 36 is provided in the lower part of the container 2 to collect the water 9 settled here. The collection hole 36 is provided with the collection valve 3.
The collection pipe 38 is connected through the connection 7. Although the cleaning liquid 62 is insulative and thus unnecessary, the water 9 is conductive and the electrode portion (the ground electrode plate 20) in the settling portion (the lower part of the first region a) 2a where the water 9 is settled. And electrode plate 3
0a) is covered with insulators 23 and 33.

On the other hand, a recovery hole 27 for recovering the cleaning liquid 62 is provided in the upper part of the third area c where the cleaning liquid 62 in which the ink pigment 61 and the water 9 are separated and regenerated is stored. A collection pipe 29 is connected to the collection hole 27 via a collection valve 28. First of the present invention
Since the waste liquid regenerating apparatus of the printing press according to the embodiment is configured as described above, first, a clean cleaning liquid 62 is supplied into the container 2, and the first waste liquid 11 is supplied into the container 2 while flowing the waste liquid 11 into the container 2. A sufficiently high voltage (for example, 8 kV) is applied to the second applied electrode plate 30b.
, A voltage (for example, 10 kV) higher than that of the first application electrode plate 30a is applied. Thereby, the first area a
A strong electric field is generated in the second region b, and a weaker but somewhat stronger electric field is generated in the second region b than in the first region a.

That is, in the first region a, the ink pigment 61 in the waste liquid 11 is applied to the ground electrode plate 20 by the large potential difference (8 kV) between the moving ground electrode plate 20 and the first application electrode plate 30a. When sucked, the water 9 aggregates and settles to the bottom. Waste liquid 11 in which some ink pigments 61 remain
Passes through the first applied electrode plate 30a of the wire mesh and moves to the second region b. In the second region b, the first applied electrode plate 30a and the second applied electrode plate 30b And a sufficient potential difference (2 kV) is generated between the waste ink 11 and a part of the ink pigment 61 remaining in the waste liquid 11 aggregates in the direction of the first application electrode plate 30 a, and the potential difference further increases therefrom. And aggregates toward the ground electrode plate 20.

As a result, all the ink pigments 61 are coagulated and adsorbed on the ground electrode plate 20, and the water 9
Settles to the bottom in the area a. In the third area (processed area) c on the left side of the container 2, only the cleaned cleaning liquid 62 is stored. Here, the water 9 that has settled at the bottom (tank) 2 a in the first area a is recovered outside through the recovery hole 36 through the recovery hole 36 by opening the recovery valve 37, and the cleaning liquid 62 that is regenerated neatly When the collection valve 28 is opened, it is collected outside from the collection hole 27 provided in the upper part of the third area c through the collection valve 28 and reused.

In this way, in a system in which the three components of the ink pigment 61, the insulating cleaning liquid 62, and the conductive water 9 are mixed, these three components can be separated by a single device. Such a separation can be performed in a relatively short time. By the way, the waste liquid regeneration device 15 according to the present embodiment
Is configured as a system incorporated in an actual cleaning device of a printing press, as shown in FIG.

As shown in FIG. 5, in the cleaning device 70, the cleaning roller 71 is pressed against the rotating blanket cylinder 90 shown on the left side in FIG. 5, and supplied from the main regenerating device 15 by the cleaning liquid nozzle 75 from below. The cleaning liquid 62 is sprayed. Thus, the cleaning liquid 62 jetted from the nozzle 75 cleans the blanket cylinder 90 via the blade 74 and the cleaning roller 71.

The waste liquid 11 after washing is collected in a recovery tank 78 provided below and transferred to the regenerating device 15 through a pipe 76. In FIG. 5, reference numeral 72 denotes a drying nozzle of the blanket cylinder, and reference numeral 73 denotes an air motor, which are not necessities of the present invention. The playback device 15 shown on the right side in FIG.
Is a waste liquid regenerating device for a printing press according to the above-described embodiment, and the same reference numerals as those in FIGS. 1 and 2 denote the same components, and a detailed description thereof is omitted.

The waste liquid 11 from the cleaning device 70 is supplied to a pipe 76.
From the supply pipe 25 to the first area (waste liquid supply area) a in the container 2 through the pipe 24, and the ink pigment 61, the insulating cleaning liquid 62, the conductive From the waste liquid 11 in which three components of water 9 are mixed,
Separate the three components. Then, the cleaning regenerating liquid 26 regenerated by the regenerating device 15 is sucked up from the collecting hole 27 provided in the third area (processed layer) c of the container 2 through the collecting pipe 29, and becomes the cleaning device 62 as the cleaning liquid 62. The cleaning liquid is supplied to a cleaning liquid nozzle 75 at 70.

On the other hand, the water 9 that has settled below the first area (waste liquid supply area) a passes through the recovery hole 36 and the pipe 38 and, like the regenerating liquid 26, the cleaning liquid nozzle 75 of the cleaning device 70.
Supplied to Then, the recovered water 9 and the regenerating liquid 26 (the cleaning liquid 62) sent to the cleaning device 70 are sent to the cleaning liquid injection nozzle 75, and the cleaning roller 71
And used for cleaning the blanket cylinder 90.

Thereafter, by repeating this cycle, continuous regeneration of the cleaning waste liquid and cleaning of the blanket cylinder with the regenerated cleaning liquid can be performed. In this manner, the cleaning liquid 62 can be regenerated with high efficiency, the disposal cost of the cleaning waste liquid 11 can be reduced, and the running cost for cleaning the printing press can be reduced. Can be improved in productivity.

The ground electrode plate 20 is formed by electrophoresis.
It is necessary to remove the ink pigment 61 aggregated and adsorbed from the ground electrode plate 20. There are various methods for this removal measure. For example, a method as shown in FIG. 6 can be considered. 6, the same reference numerals as those in FIGS. 1 and 2 denote the same parts, and a description thereof will be omitted.

As shown in FIG. 6, this method is based on a so-called scraping jig. The scraping jig is driven by a cylinder or a motor (not shown) and slides along the surface of the ground electrode plate 20. A slide bar 50a, and a scraping plate 50 fixed to the tip of the slide bar 50a.
By moving the slide bar 50a along the surface of the ground electrode plate 20 of the scraping plate 50, the ink pigment 6 adhering to the surface of the ground electrode plate 20 is formed.
1 is scraped down.

The scraping plate 50 is made to stand by at the upper portion during the regeneration process. This makes it possible to carry out a regeneration process of the washing waste liquid without replacing the electrode.
Incidentally, a waste liquid regeneration test was performed on the regenerating apparatus of the present embodiment, and this will be described.

First, regarding the device conditions, the capacity (liquid storage amount) of the container 2 was set to 600 cc, and the ground electrode plate 20 and the first
The distance between the electrodes (distance A shown in FIG. 4) with the applied electrode plate 30a is 20 mm, and the distance between the electrodes (distance B shown in FIG. 4) with the first applied electrode plate 30a and the second applied electrode plate 30b is 20 mm. 2
The distance between the electrodes (the distance C shown in FIG. 4) between the second application electrode plate 30b and the other end of the container 2 is 20 mm. Regarding the voltage load condition, the first applied electrode plate 30a is 8 k
V, the second applied electrode plate 30b is set to 10 kV, and the waste liquid is sheet-fed ink [eg, Hi-Echo MZ (Toyo Ink), Cervo Y (Tokyo Ink), Geos-GN (Dainippon Ink)]. As the washing liquid, for example, Auto Clean (manufactured by Niken Kagaku), Braclin S (manufactured by Nikka), and Print Cleaner (manufactured by Toyo Ink) are used. Then, a solution obtained by diluting the ink to 1% with a cleaning solution is further added with 2%.
A simulated waste liquid was prepared by adding 0% water, and 100 cc of the simulated waste liquid was injected into the first region a of the apparatus, and a regeneration test was performed.

The test results under the above conditions were as follows. First, water separated and settled, and the ink adhered to the ground electrode. When collecting the clean washing liquid in the third area c, there was no waste liquid flow from the second area b to the third area c. The time required for the reproduction was 400 to 600 seconds. When the distance between the electrodes is shortened from 20 mm to 10 mm, the time required for regeneration is reduced to 1/4, but the flow of waste liquid between the regions becomes difficult, and the ground electrode plate 20
There was a disadvantage that it was difficult to remove the ink attached to the surface.

From the test results, the time required for regeneration varies depending on the distance between the electrode plates (distance between the respective regions), and the ink flow conditions between the layers may differ. It was clarified that separation and aggregation occurred, and a clean washing solution could be recovered. Thus, by setting appropriate conditions (distance between electrodes, capacity of each region, distribution of potential difference, etc.) according to the capacity of the container, the washing waste liquid can be completely separated into water, ink pigment, and the washing liquid.

In the first embodiment described above, the ink pigment 61 adhered to the surface of the ground electrode plate 20 can be scraped down by the scraping plate 50, but the scraped ink pigment falls below the layer. Then, the water 9 accumulates inside a storage tank or the like. For this reason, it is necessary to periodically perform cleaning so as to remove the ink pigment 61 in the storage layer.

The ground electrode plate 2 such as the scraping plate 50
If an apparatus for removing the ink pigment 61 from 0 is provided, and the scraping process of the ink pigment and the removing step are combined, the cost and time required for removing the separated ink pigment may be increased. Therefore, the cleaning liquid can be regenerated with high efficiency, and the separated ink pigment can be removed.
Reduction of equipment cost and running cost for disposal,
The following embodiments have been devised so that the productivity of the printing press can be improved.

First, a second embodiment of the present invention will be described. FIGS. 7 to 9 show a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to a second embodiment of the present invention. Is a schematic plan view of the waste liquid storage container and a schematic cross-sectional view of the waste liquid storage container seen from a side direction,
8 and 9 are schematic sectional views for explaining the operation. 7 to 9, the same reference numerals as those in FIGS. 1 to 6 denote the same parts, and a description thereof will be partially omitted.

In the waste liquid regenerating apparatus of the first embodiment, the earth electrode plate (earth electrode) 20 and the application electrode plate 30 are set up in the waste liquid storage container 2 in the vertical direction.
In the waste liquid regenerating apparatus for a printing press according to the present embodiment, FIG.
As shown in (a) and (b), the plate-like earth electrode plate (earth electrode) 20 and the application electrode plate 30 are connected to the waste liquid storage container 2.
It is arranged horizontally inside. Further, two application electrode plates 30 are provided as in the first embodiment. Then, the ground electrode plate 20 is connected to the ground 8, and the electrode plates 30a, 3
0b is connected to the high-voltage power supply 7 via different voltage loads (7a, 7b) so that different voltages can be applied, respectively, as in the first embodiment.

More specifically, the ground electrode plate 20 is disposed substantially horizontally below the waste liquid storage container 2, and the metal electrode plates 30a and 30b are disposed substantially horizontally above the ground electrode plate 20 within the container 2. Has been established. However, in the present embodiment, the partition wall 19 is disposed close to the one side wall 2b in the container 2, and the area defined by the partition wall 19 and the one side wall 2b is filled with the waste liquid 11 into which the waste liquid 11 is charged. It is configured as a unit 2A. The metal electrode plates 30a and 30b are connected to the partition wall 19 and the other side wall 2c facing the one side wall 2b in the container 2.
Are disposed between the respective members via insulators 31c and 31d. The ground electrode plate 20 is provided so as to cover the entire bottom in the container 2.

Therefore, the inside of the container 2 contains the electrode plates 30a and 30a.
0b, the first region (also referred to as the first layer or the input layer) a and the second region (the second region
B) and a third region (also referred to as a third layer or a processed layer) c. The electrode plates 30a and 30b are the same as those in the first embodiment. Similarly, a, b, c
The waste liquid 11 can be circulated between the respective areas. The waste liquid inlet 2A on the side wall 2b side of the container 2 has the first
(A first layer) a.

The upper region (third layer) c in the container 2 is provided with a first recovery hole 27 for recovering the regenerated washing liquid 62, and the lower region (first layer) in the container 2 is provided. Layer)
A is provided with a second recovery hole 36 for recovering the ink pigment 61 and the water 9 separated from the cleaning liquid 62. Each of the collecting holes 27 and 36 is configured in the same manner as in the first embodiment.

The waste liquid regenerating apparatus for a printing press according to the second embodiment of the present invention is configured as described above.
As shown in the figure, the washing waste liquid 11 is charged into the container 2 from the waste liquid charging section 2A, the waste liquid 11 is charged to a position indicated by a two-dot chain line e, and the waste liquid 11 is further transferred from the waste liquid charging section 2A into the container 2. To supply. The supplied waste liquid enters the second region (treatment layer) b along the direction of arrow Y.

Here, the waste liquid 11 is applied to the applied electrode plates 30a, 3
0b, water 9, ink pigment 61 and cleaning liquid 6
And 2. The cleaning liquid 62 that has been separated and regenerated is stored in the third region (processed layer) layer c at the top of the container 2. At this time, since the waste liquid inlet 2A is provided so as to communicate with the first region (input layer) a, the cleaning liquid 62, the water 9, and the ink pigment 61 can be more smoothly separated from the waste liquid 11.

On the other hand, the separated water 9 settles at the lower part of the container 2 and is stored in the first area a immediately above the earth electrode 20. Here, the water 9 itself serves as a ground, causing the ink pigment 61 to aggregate and adhere to the vicinity of the interface of the water 9, and as a result,
The separated ink pigment 61 adheres to the surface of the water 9 and is stored. The amount of the waste liquid 11 supplied to the container 2
The cleaning liquid 62 in the inside increases and rises, for example, to a position indicated by a two-dot chain line f in FIG. As a result, the cleanly regenerated cleaning liquid can be recovered from the pipe 29 through the recovery hole 27 and the valve 28.

In this way, the recovery of the cleaning liquid 62 by separating the waste liquid 11 into the water 9, the ink pigment 61 and the cleaning liquid 62 is continued, and after a long period of time, as shown in FIG.
Above the earth electrode 20, a large amount of water 9 is stored. In addition, a large amount of the separated ink pigment 61 adheres to the surface of the water 9. When the ink pigment 61 and the water 9 are stored for a long period of time as described above, it is necessary to dispose of the ink pigment 61 and the water 9 from the container 2. In the present embodiment, the water 9 is collected from the collection hole 36 through the valve 37 and the pipe 38. And the ink pigment 61 are simultaneously collected outside the container 2 and discarded.

In this way, the ink pigment 61 separated and stored from the waste liquid 11 can be easily discarded together with the water 9, so that a device for disposal is not required, and it can be exhausted in a short time. Can also be cheaper. Further, in the waste liquid regeneration by this method, the separated ink pigment 61 and water 9 do not dissolve in the cleaning liquid 62 even if left for a long period (one year or more), so that the caution time regarding the disposal of the ink pigment 61 is almost unnecessary. .

Next, a third embodiment of the present invention will be described. FIG. 10 is a schematic sectional view showing a waste liquid regenerating apparatus for a printing press as a third embodiment of the present invention. 10, the same reference numerals as those in FIGS. 1 to 9 denote the same parts, and a description thereof will be partially omitted. As shown in FIG. 10, in the present embodiment, in the second embodiment, only one set (one sheet) 30a of the applied electrode plates is provided.
Other configurations are the same as those of the second embodiment.

The waste liquid regenerating apparatus for a printing press according to the third embodiment of the present invention is configured as described above.
As in the embodiment, two sets (two sheets) of application electrodes 30a and 30
b, the effect as an electrostatic filter is slightly reduced, and the waste liquid 11 is replaced with water 9 and ink pigment 6.
1. Although the effect of separation into the cleaning liquid 62 is weakened, a certain degree of separation effect can still be obtained. In particular, depending on the type of cleaning waste liquid (the type of cleaning liquid and ink pigment), sufficient separation can be performed in a short time.

Therefore, depending on the washing waste liquid conditions and operating conditions (necessary regeneration cycle), as in this embodiment,
Even if the configuration is simplified by using only one set of application electrodes, the waste liquid can be sufficiently regenerated. Similarly to this, in the case where the electrode plates are arranged in the vertical direction as in the first embodiment, a configuration in which only one set (one sheet) of application electrode plates is conceivable is also conceivable.

Next, a fourth embodiment of the present invention will be described. FIGS. 11 to 13 are views showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press as a fourth embodiment of the present invention. 11 and 12 are schematic sectional views showing the waste liquid regenerating apparatus, and FIG. 13 is a schematic sectional view showing a modification of the waste liquid regenerating apparatus. 11 to 13, FIG.
The same reference numerals as those in FIG. 10 denote the same components, and a description thereof will be partially omitted.

The waste liquid regenerating apparatus of this embodiment is different from that of the second embodiment in that the earth electrode 20 arranged at the lower part of the container 2 can be drawn out of the container 2.
That is, as shown in FIGS. 11 and 12, an opening 2B is provided in the lower part of the container 2, and a conductive adapter (earth electrode fixing adapter) 100 which is detachable from the outside of the container 2 is provided in the opening 2B. The ground electrode 20 has one end fixed to the conductive adapter 100.

Then, the ground electrode 20 is advanced into the container 2 through the opening 2B, and the conductive adapter 100 is connected to the opening 2B.
12, the device is in a use state as shown in FIG. 12, and if the conductive adapter 100 is removed from the opening 2B,
As shown in FIG. 11, the ground electrode 20 can be pulled out of the container 2. When the conductive adapter 100 is attached to the opening 2B, the opening 2B is sealed by the conductive adapter 100 so that liquid does not leak from inside the container 2. The ground electrode 20 is connected to the ground 8 via the conductive adapter 100.

The waste liquid regenerating apparatus for a printing press according to the fourth embodiment of the present invention is configured as described above. Therefore, when the ink pigment 61 is discarded, the ground electrode 20 is shown in FIG. Out of the container 2 as shown in FIG.
The ink pigment 61 deposited on the top can be discarded.
As described above, when the ground electrode 20 is horizontal, if the liquid in the container 2 is removed, the ink pigment 61 is deposited on the ground electrode 20. Therefore, if the ground electrode 20 is pulled out of the container 2, the ink pigment 61 is removed. It can be easily discarded.

Therefore, when the water 9 and the ink pigment 61 are stored above the earth electrode 20 by using the apparatus for a long time,
The cleaning liquid 62 in the container 2 is recovered from the recovery hole 27 as much as possible, and then the ground electrode 20 is pulled out of the container 2 by sliding the ground electrode fixing adapter 100 as shown in FIG. Along with this, the water 9, the ink pigment 61, and some washing liquid stored on the upper part of the ground electrode 20 are discarded outside the container.

After the liquid in the container 2 has been discharged to the outside, the earth electrode fixing adapter 100 may be slid (removed). When the ground electrode 20 is pulled out of the container 2, the ground electrode 20 may be cleaned. According to this method, it is easy to discard the separated ink pigment 61 out of the container 2, and the apparatus configuration can be made relatively simple. Further, since the ground electrode 20 is drawn out of the container 2, there is an advantage that the inside of the main container 2 can be easily cleaned.

By the way, such a method that the ground electrode 20 is pulled out of the container 2 and the ink pigment 61 is discarded is as follows.
As shown in FIG. 11 and FIG. 12, in addition to one set (one sheet) of the applied electrode plates 30 (third embodiment), as shown in FIG. (2 sheets) (second embodiment). Also, the first
As in the embodiment, in the case where the ground electrode 20 is arranged in the vertical direction, the ground electrode 20 can be pulled out upward, the ground electrode 20 can be removed, and the ink pigment 61 attached to the ground electrode 20 can be removed. You may do so. As described above, the number of application electrode plates to be combined and the installation method of the ground electrode can be freely selected.

Next, a fifth embodiment of the present invention will be described. FIG. 14 is a schematic sectional view showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to a fifth embodiment of the present invention. 14, the same reference numerals as those in FIGS. 1 to 13 denote the same parts, and a description thereof will be partially omitted.

As shown in FIG. 14, in the present embodiment, an aluminum foil 40 is used as a ground electrode in the first embodiment, and this aluminum foil 40
The ink pigment 61 is configured to adhere to both surfaces. In particular, in this apparatus, a new aluminum foil 40 is coiled and provided in the feeding device 41 outside the container 2, and the guide roll 43 inside the container 2 and the guide roll 44 outside the container 2 are used as guides. As shown in FIG. 14, the aluminum foil 40 is transported and wound by a winding device 42 outside the container 2. In addition, a ground electrode 8 is connected to the aluminum foil 40 via a sliding contact terminal 8a.

The feeding device 41 is equipped with a reel around which a coiled aluminum foil 40 is wound, and the winding device 42 is equipped with a reel around which the aluminum foil 40 can be wound. When the reel is rotated by a motor or manually, the reel on the side of the delivery device 41 is extruded while extruding 40 foils of aluminum foil while rotating accordingly.

The waste liquid regenerating apparatus for a printing press according to the fifth embodiment of the present invention is configured as described above, so that the aluminum foil 40 is charged by the earth electrode 8 and the container 2 is charged.
The ink pigment 61 in the waste liquid 11 in the container 2 adheres to the surface (both front and back surfaces) of the aluminum foil 40. New aluminum foil 40 in container 2
After it enters the waste liquid 11 and adheres the ink pigment 61, it is taken up by the other take-up device 42.

In this case, the aluminum foil 40 may be always moved at a very low speed, or may be stopped for a predetermined time and then moved in a predetermined cycle. Thus, the ink pigment 61 separated from the cleaning liquid 62
Is collected and adhered to the aluminum foil 40, so that the ink pigment 61 does not adhere to or accumulate in the container 2, so that contamination in the container 2 can be prevented.

Since the recovered ink pigment 61 can be discarded together with the aluminum foil 40, contamination of the apparatus and the environment can be prevented. In addition, the configuration of the removing apparatus by this method is compact and the manufacturing cost is low. Further, since the aluminum foil 40 may be, for example, a commercially available aluminum foil or the like, there is an advantage that the running cost can be relatively reduced.

In order to prevent excessive tension from being applied to the aluminum foil 40, the feeding device 41 and the take-up device 42 are linked with each other. May be driven. Of course, instead of the aluminum foil 40, another conductive metal thin film (metal sheet) may be used.

Next, a sixth embodiment of the present invention will be described. FIG. 15 is a schematic sectional view showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press as a sixth embodiment of the present invention. 15, the same reference numerals as those in FIGS. 1 to 14 denote the same parts, and a description thereof will be partially omitted. As shown in FIG. 15, in the present embodiment, the thin paper 94
In this case, the ink pigment 61 is attached to the surface of the sheet and the ink pigment 61 is removed together with the thin paper 94.

That is, in this system, the ground electrode plate 20
Is set in the container 2, and thin paper 94 is pressed against both surfaces of the ground electrode 20 through a plurality of guide rollers 93. Further, as shown in FIG. 15, the thin paper 94 is formed into a new thin paper 94 in a coil shape (roll shape) and is mounted on the delivery device 91 outside the container 2, and the guide roller 93 in the container 2 is used as a guide. Then, it is transported and wound up by a winding device 92 outside the container 2. The thin paper 94 sent from the feeding device 91 is charged because it is pressed against the ground electrode plate 20 in the liquid in the container 2.

The waste liquid regenerating apparatus for a printing press according to the sixth embodiment of the present invention is configured as described above, so that the ink pigment 61 adheres to the surface of the thin paper 94 in the liquid in the container 2. go. If the thin paper 94 to which the ink pigment 61 has adhered is wound by the other winding device 92, the unnecessary ink pigment 61 can be easily collected together with the thin paper 94. Then, the thin paper 94 wound with the ink pigment 61 and wound up by the winding device 92 can be discarded as it is.

Here, the thin paper 94 in the liquid layer in the container 2
May always be finely moved, or may be repeatedly moved and stopped in a predetermined cycle. As described above, by using the ink pigment removing device in which the thin paper 94 is coiled,
Adhesion of the ink pigment 61 to the container 2 and contamination of the regenerated cleaning liquid can be easily prevented.

Further, since the attached ink pigment is discarded together with the thin paper 94, there is an effect of preventing pollution of the apparatus and the environment.
Further, there is an advantage that the configuration of the removing device is easy, the production cost can be reduced, and the running cost can be reduced because thin paper is used. In order to prevent excessive tension from being applied to the thin paper 94, the feeding device 41 and the winding device 42 are linked together as in the fifth embodiment, and the feeding device 41 is also reeled in the same manner as the winding device 42. May be driven by a motor or the like.

Next, a seventh embodiment of the present invention will be described. FIG. 16 is a view showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to a seventh embodiment of the present invention. The horizontal cross-sectional view [cross-sectional view taken along the line CC of (b)] is a schematic cross-sectional view of the waste liquid storage container viewed from the side. 16, the same reference numerals as those in FIGS. 1 to 15 denote the same parts, and a description thereof will be partially omitted.

As shown in FIGS. 16 (a) and 16 (b), in this embodiment, the container 2 is a quadrangle (square) in plan view, and a cylindrical ground electrode 80 is provided at the center of the container 2. are doing. The application electrode plate 35 is formed in a cylindrical shape,
It is arranged on the outer periphery of the cylindrical ground electrode 80.
Here, the application electrode plate 35 has two layers, an inner layer and an outer layer, and the first layer has a cylindrical metal net 35 formed in a cylindrical shape.
a, and a similar wire mesh electrode 35b is provided in the second layer.

Then, for example, the cylindrical earth electrode 80
A voltage of 10 kV (kilo volt) is applied to the first layer electrode 35a close to, and a voltage of 12 kV (kilo volt) higher than that of the first layer is applied to the second layer. These voltage values are only a guide and are not limited to these values. Further, the cylindrical electrode 80 is driven to rotate by a motor 81. Further, a scraping blade 82 is pressed against the cylindrical electrode 80. When the cylindrical electrode 80 rotates, the scraping blade 82 pressed against the outer periphery of the cylindrical electrode 80 and slidably contacts the cylindrical electrode 80. The ink pigment 61 attached to the surface is scraped off.

Since the waste liquid regenerating apparatus for a printing press according to the seventh embodiment of the present invention is configured as described above, the waste liquid (contaminated cleaning liquid) is supplied to the central charging layer a. Here, when a voltage is applied to the application electrode plates 35a and 35b, the ink pigment adheres to the cylindrical electrode 80 connected to the ground 8. Here, the ink pigment 61 attached to the cylindrical electrode 80 is scraped off by the scraping blade 82, and the scraped ink pigment 61 is stored in the lower part of the container 2.

The ink pigment 61 accumulated in the lower part of the container 2 is
It can be taken out of the container 2 periodically, but in some cases, even if the ink pigment 61 is dropped into the water storage tank portion 9A of the separated water 9 and the ink pigment 61 is discarded together with the water. Good. According to such a device, since the ground electrode 80 is cylindrical, there is an advantage that the ink pigment is easily adhered, and there is also an advantage that the device configuration is easy and the manufacturing cost and the running cost can be reduced.

Next, an eighth embodiment of the present invention will be described. FIG. 17 is a view showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to an eighth embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the waste liquid storage container viewed from the side, and FIG. 4B is a cross-sectional view taken along line DD in FIG. 17, the same reference numerals as those in FIGS. 1 to 16 denote the same parts, and a description thereof will be partially omitted.

As shown in FIGS. 17 (a) and 17 (b), in the present embodiment, a rotating disk type earth electrode plate is used in the first embodiment. In other words, the disc-shaped ground electrode plate 83 is provided on the waste liquid input layer a in the container 2.
Are supported by the rotating shaft 85 of the motor 86. And
An insulator 8 is provided on the opposite surface of the ground electrode plate 83 so that the ink pigment 61 adheres to only one surface of the ground electrode plate 83.
4 is stuck. In addition, a scraping blade 87 for scraping off the attached ink pigment 61 is provided on the side of the ground electrode plate 83 where the ink pigment is attached, and is pressed against the attached surface. Reference numeral 61 denotes a blade 8 when the electrode plate 83 rotates.
7, is scraped off from the electrode plate 83.

Since the waste liquid regenerating apparatus for a printing press according to the eighth embodiment of the present invention is configured as described above, the ink pigment 61 attached to the ground electrode plate 83
Is rotated, the blade 87 causes the electrode plate 8 to rotate.
3, the ink pigment 61 scraped off and scraped off
Accumulates in the lower part of the container 2 and may be discharged periodically. This makes it possible to easily and reliably remove the attached ink pigments while looking at the structure of the apparatus as simple as it can reduce the manufacturing cost of the apparatus, thereby improving the operation rate. There are advantages that can be.

Next, a ninth embodiment of the present invention will be described. FIG. 18 is a diagram showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to a tenth embodiment of the present invention. The horizontal sectional view [sectional view taken along the line EE in (b)] is a schematic sectional view seen from the side of the waste liquid storage container. 18, the same reference numerals as those in FIGS. 1 to 17 denote the same parts, and a description thereof will be partially omitted.

As shown in FIGS. 18A and 18B, in the apparatus of this embodiment, a metal sheet 95 is used as a ground electrode, and the metal sheet 95 is arranged in an endless manner. In other words, the first region (the input layer) in the container
In a, an endless metal sheet 95 is provided held by a pair of rotating rolls 96, 96. One of the rotating rolls 96 is driven to rotate by a motor 98, through which the endless metal sheet 95 is driven by the one rotating roll 96.

The metal sheet 95 is used as an earth electrode, and the ink pigment 61 is attached to the surface of the metal sheet 95. A scraping blade 97 is pressed against the surface of the metal sheet 95, and the ink pigment 61 adhered to the surface of the metal sheet 95 is pressed.
Is scraped off by the scraping blade 97.

Since the waste liquid regenerating apparatus for a printing press according to the ninth embodiment of the present invention is configured as described above, the ink pigment 61 is applied to the surface of the metal sheet 95 serving as the ground electrode.
Is adhered, the scraping blade 97 pressed against the surface of the metal sheet 95 scrapes off the ink pigment 61 adhered to the surface of the metal sheet 95. The ink pigment scraped off in this way accumulates in the lower portion of the container 2 and may be periodically discarded to the outside. As described above, according to the apparatus according to the present embodiment, the configuration is simple, the burden on the manufacturing cost is small, and the maintenance is easy,
There is an advantage that running cost is also reduced.

Next, a tenth embodiment of the present invention will be described. FIG. 19 is a schematic sectional view showing a waste liquid regenerating apparatus and a waste liquid regenerating method for a printing press according to a ninth embodiment of the present invention. In FIG. 19, the same reference numerals as those in FIGS. 1 to 18 denote the same components, and a description thereof will be partially omitted. In the present embodiment, the electrodes are configured so that a counter-electric field is unlikely to occur.

That is, as shown in FIG. 19, in the apparatus of the present embodiment, a conductive projection or a mesh-like metal is used for the ground electrode 88, and the + charge of the attached ink pigment flows. It is characterized in that the shape is easy and the shape is not easily affected by the anti-electric field. Further, an ultrasonic vibration generator 89 for ultrasonically vibrating the ground electrode 88 and re-dissolving the attached ink pigment in the cleaning liquid 62 in the liquid layer of the container 2 is provided.

Since the waste liquid regenerating apparatus for a printing press according to the tenth embodiment of the present invention is configured as described above, the ground electrode 88 is hardly affected by the anti-electric field, and the ink pigment 61 once adhered to the container is removed. Since there is no fear of dissolution in the liquid layer of No. 2, it can be used without maintenance for a long time (according to experiments). After long-term continuous use (in the experiment, the thickness of 5 mm was adhered in one month), the ground electrode 88 was ultrasonically vibrated by the ultrasonic vibration generator 89, and the attached ink pigment 61 was removed from the container 2. The ink pigment 61 is discarded together with the cleaning liquid 62 after being dissolved again in the cleaning liquid 62 in the layer.

According to such a removing method, maintenance for a long time is not required, and there is an effect that the disposal efficiency is improved, and therefore, the running cost can be reduced. The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments, and can be variously modified and implemented without departing from the gist of the present invention. For example, more metal electrode plates 30 may be provided in the container 2. In addition, the metal electrode plate 30 is not limited to a wire mesh shape as long as the waste liquid can flow therethrough.

[0101]

As described in detail above, according to the waste liquid regenerating apparatus for a printing press (claims 1 and 2) or the waste liquid regenerating method for a printing press (claim 20) of the present invention, an electrostatic field is generated in the waste liquid. Generates and electrostatically aggregates the water and ink pigment from the waste liquid using electrophoresis of the ink pigment due to the electrostatic field to separate the waste liquid into the washing liquid and the water and ink pigment. This makes it possible to regenerate the cleaning liquid with high efficiency, reduce the disposal cost of the cleaning waste liquid, and reduce the running cost of cleaning the printing press, thereby improving the productivity of the printing press. The advantage that the improvement can be achieved is obtained.

By increasing the voltage applied to the plurality of metal electrode plates as the distance from the ground electrode plate increases, the ink pigment is surely aggregated on the ground electrode plate.
Adsorption becomes possible, and the waste liquid regeneration performance is improved (claim 3). By setting the distance between the electrodes close to the ground electrode plate to be larger than the distance between the electrodes far from the ground electrode plate, the ink pigment can be surely aggregated and adsorbed on the ground electrode plate, and the waste liquid can be regenerated. The performance is improved (claim 4).

The ground electrode plate and the plurality of metal electrode plates are arranged such that the ground electrode plate is closest to one side in the waste liquid storage container, and the other side in the waste liquid storage container is moved from the one side to the other side in the waste liquid storage container. It is arranged side by side, supplies the waste liquid to one side in the waste liquid storage container, and recovers the cleaning liquid regenerated from the other side in the waste liquid storage container farthest from the one side, In addition, the regeneration of the waste liquid and the use of the regenerated cleaning liquid can be performed smoothly (claim 5).

By connecting the waste liquid regenerating apparatus to a blanket cylinder cleaning apparatus for cleaning a blanket cylinder of a printing press, the blanket cylinder can be cleaned using the regenerated cleaning liquid while regenerating the waste liquid. The workability is greatly improved (claim 6). By providing a sedimentation part for sedimenting the water separated from the waste liquid under the earth electrode plate on one side in the waste liquid storage container, the water separated from the waste liquid can be reliably collected and reused. (Claim 7).

Further, by providing a scraping plate for scraping the ink pigment which has aggregated and adhered to the ground electrode plate and separating it from the ground electrode plate, it is possible to regenerate the washing waste liquid without replacing the electrode. (Claim 8). Further, the ground electrode is disposed substantially horizontally below the waste liquid storage container, and the metal electrode plate is disposed substantially horizontally above the ground electrode in the waste liquid storage container. A first recovery hole for recovering the regenerated cleaning liquid is provided in an upper part of the inside, and a second recovery hole for recovering the ink pigment and water separated from the cleaning liquid is provided in a lower part of the waste liquid storage container.
By providing a recovery hole, it is possible to easily recover the cleaning liquid separated from the waste liquid and water and ink pigment, respectively, making it easier to reuse the cleaning liquid and discard water and ink pigment. And it can be performed smoothly (claim 9).

Further, a partition wall is disposed close to one side wall in the waste liquid storage container, and an area defined by the partition wall and the one side wall is constituted as a waste liquid charging section for charging the waste liquid. ,
By disposing the metal electrode plate between the other side wall facing the one side wall in the waste liquid storage container and the partition wall,
The washing liquid, water and ink pigment can be more smoothly separated from the waste liquid.

Further, by making the plurality of metal electrode plates metal wire-like metal electrode plates, it is possible to reliably flow the waste liquid through the metal electrode plates, and it is easy to obtain the above effect. . Further, by allowing the ground electrode to be drawn out of the waste liquid storage container, the ink pigment can be collected and collected.
It becomes easier to dispose (claim 12).

Further, the earth electrode is formed of a metal sheet (for example, aluminum foil) that can be wound and wound in a coil shape, and this metal sheet is sent out from a feeding device to make the inside of the waste liquid storage container. After being passed, the ink pigment is taken up by a take-up device, which makes it easier to collect and dispose of the ink pigment, and also contributes to prevention of contamination in the waste liquid storage container and purification of the cleaning liquid to be reused. Item 13).

In addition, the roll-shaped thin paper covering the surface of the ground electrode is sent out from the feeding device, passed through the waste liquid storage container, and then wound up by the winding device, thereby recovering the ink pigment. Disposal can be made easier, and it also contributes to prevention of contamination in the waste liquid storage container and purification of the cleaning liquid to be reused (claim 14). Further, the earth electrode is constituted by a rotatable cylindrical metal bar, and the metal electrode plate is constituted in a cylindrical shape so as to surround the outside of the earth electrode. Providing a blade that scrapes the ink pigment attached to the outer surface of the bar also makes it easier to collect and dispose of the ink pigment, and also helps to prevent contamination in the waste liquid storage container and purify the cleaning liquid that you want to reuse. (Claim 15).

Further, the ground electrode may be constituted by a rotatable metal disk, and a blade for slidingly contacting the metal disk and scraping the ink pigment adhered to the outer surface of the metal disk may be provided. In addition to being able to more easily collect and dispose of waste water, it also contributes to prevention of contamination in the waste liquid storage container and purification of the cleaning liquid to be reused. Further, the earth electrode is constituted by an endless metal sheet, and a driving device for rotating and driving the endless metal sheet; and the ink pigment slidably in contact with the endless metal sheet and adhering to an outer surface of the metal sheet. Providing a scraping blade also makes it easier to collect and dispose of the ink pigment, and also contributes to prevention of contamination in the waste liquid storage container and purification of the cleaning liquid to be reused.
7).

Further, the ground electrode is made of conductive projections or mesh-like metal, so that the ground electrode is less affected by the repulsive electric field. Since there is no fear of dissolution in the liquid layer, the device can be used without maintenance for a long time (claim 18). In this case, if an ultrasonic vibrator for vibrating the ground electrode to redissolve the ink pigment adhered to the ground electrode in the cleaning liquid is provided, the adhered ink pigment can be more easily removed ( Claim 19).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a waste liquid storage container showing a waste liquid regenerating apparatus of a printing press as a first embodiment of the present invention, and is a sectional view taken along the line BB of FIG.

FIG. 2 is a cross-sectional view of the waste liquid storage container showing the waste liquid regenerating apparatus of the printing press as the first embodiment of the present invention, and is a cross-sectional view taken along line AA of FIG.

FIGS. 3A to 3C show the principles of a waste liquid regenerating apparatus for a printing press and a waste liquid regenerating method for a printing press as a first embodiment of the present invention.
It is a schematic diagram demonstrated in order of (c).

4A and 4B are diagrams illustrating a waste liquid regenerating apparatus of a printing press as a first embodiment of the present invention, wherein FIG. 4A is a cross-sectional view of a waste liquid storage container, and FIG. 4B is a cross-sectional position of the waste liquid storage container. 7 is a graph showing a potential difference in a waste liquid storage container corresponding to FIG.

FIG. 5 is a system configuration diagram showing a state in which the waste liquid regenerating device of the printing press as the first embodiment of the present invention is incorporated in a cleaning device.

FIG. 6 is a cross-sectional view of a waste liquid storage container showing an example of a method of removing an ink pigment attached to a ground electrode plate in a waste liquid regenerating apparatus of a printing press as a first embodiment of the present invention.

FIGS. 7A and 7B are schematic diagrams showing a waste liquid regenerating apparatus of a printing press as a second embodiment of the present invention, wherein FIG. 7A is a schematic plan view of the waste liquid storage container, and FIG. FIG. 2 is a schematic cross-sectional view as viewed from the side direction of FIG.

FIG. 8 is a schematic cross-sectional view illustrating an operation of a waste liquid regenerating apparatus of a printing press as a second embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view illustrating the operation of a waste liquid regenerating apparatus for a printing press as a second embodiment of the present invention.

FIG. 10 is a view showing a waste liquid regenerating apparatus of a printing press as a third embodiment of the present invention, and is a schematic cross-sectional view of a waste liquid storage container viewed from a side.

FIG. 11 is a view showing a waste liquid regenerating device of a printing press as a fourth embodiment of the present invention, and is a schematic cross-sectional view of a state in which an earth electrode is pulled out, as viewed from a side of a waste liquid storage container. .

FIG. 12 is a view showing a waste liquid regenerating apparatus of a printing press as a fourth embodiment of the present invention, and is a schematic cross-sectional view of a waste liquid storage container viewed from the side.

FIG. 13 is a view showing a modified example of the waste liquid regenerating device of the printing press as the fourth embodiment of the present invention, and is a schematic cross-sectional view of the waste liquid storage container as viewed from the side.

FIG. 14 is a view showing a waste liquid regenerating apparatus of a printing press as a fifth embodiment of the present invention, and is a schematic cross-sectional view of a waste liquid storage container as viewed from the side.

FIG. 15 is a view showing a waste liquid regenerating apparatus of a printing press as a sixth embodiment of the present invention, and is a schematic cross-sectional view of a waste liquid storage container viewed from a side.

16A and 16B are views showing a waste liquid regenerating apparatus of a printing press as a seventh embodiment of the present invention, wherein FIG. 16A is a horizontal sectional view thereof [a sectional view taken along the line CC in FIG. () Is a schematic cross-sectional view of the waste liquid storage container viewed from the side.

17A and 17B are diagrams showing a waste liquid regenerating apparatus of a printing press as an eighth embodiment of the present invention, wherein FIG. 17A is a schematic cross-sectional view of a waste liquid storage container viewed from the side, and FIG. a) D-
It is arrow D sectional drawing.

FIGS. 18A and 18B are views showing a waste liquid regenerating apparatus of a printing press as a ninth embodiment of the present invention, in which FIG. 18A is a horizontal cross-sectional view of FIG. () Is a schematic cross-sectional view of the waste liquid storage container viewed from the side.

FIG. 19 is a diagram showing a waste liquid regenerating apparatus of a printing press as a tenth embodiment of the present invention, and is a schematic cross-sectional view of a waste liquid storage container viewed from a side.

FIG. 20 is a configuration diagram showing a conventional waste liquid regenerating apparatus for a printing press.

[Explanation of symbols]

2 container (waste liquid storage container) 2A waste liquid charging unit 2B opening 2a tank (settling unit) 2b one side wall in container 2 2c other side wall in container 2, 3, 4 electrode plate 7 power supply (high voltage power supply) 7a, 7b voltage load Reference Signs List 8 ground 8a sliding contact terminal 9 water 11 cleaning waste liquid (waste liquid) 15 regenerating device 20 ground electrode plate (ground electrode) 21, 22, 23, 31, 31a, 31b, 33 insulator 24, 38 pipe 25 supply pipe 26 cleaning and regeneration Liquid 27, 36 Recovery hole 28, 37 Recovery valve 29, 38 Recovery pipe 30, 30a, 30b, 30c, 35a, 35b Application electrode plate (wire mesh metal electrode plate) 40 Aluminum foil (metal sheet as ground electrode) ) 41 feeding device 42 take-up device 43, 44 guide roll 50 scraping plate 50a slide bar 61 ink pigment 62 cleaning liquid 7 Blanket cylinder cleaning device 71 Cleaning roller 72 Blanket cylinder drying nozzle 73 Air motor 74 Blade 75 Cleaning liquid nozzle 76 Piping 78 Recovery tank 80 Cylindrical electrode (earth electrode) 81 Motor 82 Scraping blade 83 Disc-shaped earth electrode plate 84 Insulator 85 rotating shaft 87 blade 88 earth electrode 89 ultrasonic vibration generator 90 blanket cylinder 91 feeding device 92 winding device 93 guide roller 94 thin paper 95 metal sheet 96 rotating roll 97 scraping blade 98 motor 100 conductive adapter (earth electrode fixing adapter) A) first region (first layer or input layer) b second region (second layer or processed layer) c third region (third layer or processed layer)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayuki Eda 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. (72) Inventor Junichi Iibushi 5007 Itozakicho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Paper and Printing Machinery Division F-term (reference) ED15 FA14

Claims (20)

[Claims] 1. A waste liquid regenerating apparatus for regenerating a waste liquid containing an ink pigment, water, and a washing liquid used in a printing press, comprising: a waste liquid storage container for storing the waste liquid; and a waste liquid storage container disposed in the waste liquid storage container. An earth electrode, a metal electrode plate disposed in the waste liquid storage container so as to be opposed to the earth electrode at a predetermined distance, and through which the waste liquid can flow, and a high voltage power supply for applying a voltage to the metal electrode plate A waste liquid regenerating device for a printing press, comprising: 2. A waste liquid regenerating apparatus for regenerating a waste liquid containing an ink pigment, water, and a cleaning liquid used in a printing press, comprising: a waste liquid storage container for storing the waste liquid; And a plurality of metal electrode plates that are arranged side by side so that the waste liquid can flow therethrough, and are disposed so as to face one end of the plurality of metal electrode plates arranged side by side at a predetermined interval. A waste liquid recycling apparatus for a printing press, comprising: a ground electrode; and a high voltage power supply for applying a voltage to the metal electrode plate to generate an electric field between the opposed electrode plates. 3. The apparatus according to claim 2, wherein the voltage applied to the plurality of metal electrode plates increases as the distance from the ground electrode increases. 4. The electric field intensity generated between the opposing electrode plates is set to be greater between electrodes close to the ground electrode than between electrodes far from the ground electrode. The waste liquid regeneration device for a printing press according to claim 2 or 3, wherein: 5. The ground electrode and the plurality of metal electrode plates bring the ground electrode closest to one side in the waste liquid storage container, and the other end in the waste liquid storage container from the one side. The waste liquid is supplied to one side in the waste liquid storage container, and the regenerated washing liquid is recovered from the other side in the waste liquid storage container farthest from the one side. The waste liquid regeneration device for a printing press according to any one of claims 2 to 4, characterized in that: 6. A blanket cylinder cleaning device for cleaning a blanket cylinder of the printing press is connected, and waste liquid discharged from the blanket cylinder cleaning device is guided to the vicinity of the ground electrode in the waste liquid storage container. The printing press according to any one of claims 1 to 5, characterized in that the cleaning liquid and water regenerated in the storage container are collected and supplied to the blanket cylinder cleaning device. Waste liquid regeneration equipment. 7. A sedimentation part for sedimenting water separated from the waste liquid is provided below the ground electrode on one side in the waste liquid storage container.
6. The waste liquid regeneration device for a printing press according to any one of the above items 6. 8. The printing method according to claim 1, further comprising a scraping plate for scraping off the ink pigment aggregated and adhered to the ground electrode and detaching the ink pigment from the ground electrode. Waste recycling equipment. 9. The waste electrode is disposed substantially horizontally below the waste liquid storage container, and the metal electrode plate is disposed substantially horizontally above the ground electrode within the waste liquid storage container. A first recovery hole for recovering the regenerated cleaning liquid is provided at an upper part in the storage container, and a second recovery hole for recovering the ink pigment and water separated from the cleaning liquid is provided at a lower part in the waste liquid storage container. 3. The apparatus according to claim 1, wherein a recovery hole is provided. 10. A partition wall is disposed near one side wall in the waste liquid storage container, and a region defined by the partition wall and the one side wall is configured as a waste liquid charging section for charging the waste liquid. The printing press according to claim 9, wherein the metal electrode plate is disposed between the partition wall and the other side wall facing the one side wall in the waste liquid storage container. Waste liquid regeneration equipment. 11. The apparatus according to claim 1, wherein the metal electrode plate is a metal net-like metal electrode plate. 12. The ground electrode is provided so as to be able to be drawn out of the waste liquid storage container.
A waste liquid regenerating device for a printing press according to claim 9. 13. The discharge device, wherein the ground electrode is formed of a metal sheet that can be wound and wound in a coil shape, is disposed outside the waste liquid storage container, and sends out the metal sheet. A winding device disposed outside the container and winding up the metal sheet after being sent out from the sending-out device and used in the waste liquid storage container, is provided. 12. The waste liquid regeneration device for a printing press according to any one of items 11 to 13. 14. A roll-shaped thin paper covering the surface of the ground electrode, a delivery device provided outside the waste liquid storage container and sending out the thin paper, and a delivery device provided outside the waste liquid storage container and provided. And a winding device that winds the thin paper after being sent out of the waste liquid storage container and used in the waste liquid storage container. Waste liquid regeneration equipment. 15. The ground electrode is constituted by a rotatable cylindrical metal bar, and the metal electrode plate is formed in a cylindrical shape so as to surround the outside of the earth electrode. The waste liquid recycling apparatus for a printing press according to any one of claims 9 to 11, further comprising a blade that slidably contacts and scrapes the ink pigment attached to the outer surface of the metal bar. 16. The ground electrode is constituted by a rotatable metal disk, and is provided with a blade that slides on the metal disk and scrapes the ink pigment attached to the outer surface of the metal disk. The waste liquid regeneration device for a printing press according to any one of claims 9 to 11, wherein 17. The ground electrode is constituted by an endless metal sheet; a driving device for rotating and driving the endless metal sheet; and a driving device that slides on the endless metal sheet and adheres to an outer surface of the metal sheet. The waste liquid recycling apparatus for a printing press according to any one of claims 9 to 11, further comprising a blade for scraping the ink pigment. 18. The waste liquid of a printing press according to claim 9, wherein the ground electrode is made of a conductive projection or a mesh-like metal. Playback device. 19. An ultrasonic vibration device for vibrating the ground electrode to re-dissolve the ink pigment attached to the ground electrode in a cleaning liquid is provided.
9. A waste liquid regenerating apparatus for a printing press according to claim 8. 20. A waste liquid regenerating method for regenerating a waste liquid containing an ink pigment, water and a washing liquid used in a printing press, wherein an electrostatic field is generated in the waste liquid, and the ink pigment is electrophoresed by the electrostatic field. Wherein the water and the ink pigment are electrostatically agglomerated from the waste liquid to separate the waste liquid into the washing liquid and the water and ink pigment.