JP2501151B2 - Waste liquid treatment device for washing out photosensitive resin plates - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating washout waste liquid of a water washable photosensitive resin plate.

[0002]

2. Description of the Related Art Photosensitive resin plates have become remarkably popular recently because they are cheaper than conventional printing plates, are easy to handle during printing, and have excellent printing characteristics. Production (plate making) of a plate from a photosensitive resin original plate is usually performed by the following procedure. That is, the photosensitive resin surface of the photosensitive resin original plate (hereinafter referred to as the photosensitive layer)
Then, a negative or positive film is adhered and then exposed with an actinic ray, and then the unexposed portion is blown off using, for example, compressed air, or the solvent is sprayed at a constant pressure to be sprayed, or the fiber is brushed. The plate is made by a method such as washing out by brushing (rubbing off) with. All of these operations are mechanically performed by a washing machine.

Recently, especially when washing out water (tap water, etc.)
In the field of flexographic printing, not only in the field of ordinary letterpress printing (letterpress printing), the photosensitive resin printing plate that can be made by
It has become popular because of its merit. However, the wash-out waste liquid generated during plate making is
Since it contains high concentrations of BOD (biochemical oxygen demand), SS (floating substance) or n-hexane extract, if it is directly discharged into a river, water quality will be subject to legal restrictions. There is a big problem in discharging untreated waste liquid as it is because it may cause pollution.
Therefore, a method for separating and removing the resin component in the waste liquid has been studied, and for example, methods such as JP-B-59-16512 and JP-A-57-113887 have been proposed. However, there is no device for efficiently carrying out these methods, and in reality, these methods are not fully utilized.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art. The object of the present invention is to easily operate a resin component from a wash-out waste liquid of a water-washable photosensitive resin plate. The purpose of the present invention is to provide a device for efficient separation.

[0005]

According to the present invention, a container body having a waste liquid hole at the bottom, a container body provided corresponding to the container body, having at least a water passage hole at the bottom, and a filter medium inside the container are provided. A waste water treatment device for washing out a water-removable photosensitive resin plate, which comprises a basket, and a ring-shaped body which is detachably attached to the waste liquid hole in the container body and has a waste liquid downflow hole therein. A plug body detachably attached to the upper part of the annular body, the plug body being capable of sealing the flow-down hole in a mounted state, and being rotated or disengaged from the annular body This is achieved by a washing liquid waste liquid treatment apparatus for a photosensitive resin plate, which has a structure in which the upper end of the flow-down hole is opened in the container body.

The wash-out waste liquid which is the object of the apparatus of the present invention is generated when an unexposed portion is washed out with water after exposing an original plate made of a photosensitive resin composition through an original film (negative or positive film). The water used as the washout liquid here is usually fresh water such as tap water, but water added with a surfactant or the like for the purpose of improving workability such as improving dispersibility of the washed resin. Even when used, this device can be applied.

The present invention will now be described with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing an example of an apparatus according to the present invention,
FIG. 2 is a schematic cross-sectional view showing one example of the structure of the annular body and the plug body provided in the container body, and FIGS. 3 and 4 are schematic cross-sectional views showing other examples of the structures of the annular body and the plug body, respectively.

In FIG. 1, 1 is a container body, 2 is a waste liquid hole provided at the bottom of the container body 1, 3 is an adapter for mounting an annular body provided in the waste liquid hole 2, and 4 is removable from the adapter 3. An annular body having a predetermined length and having a waste liquid flow-down hole 5 therein, and the lower end side 6 and the upper end side 7 of the annular body 4 are formed to have a predetermined smaller diameter than the central portion. It is formed so that it can be removably fitted in the concave portion 9 of the adapter 3 and the plug body 8. The plug body 8 is formed of a cylindrical body having a predetermined length, and a predetermined concave portion 9 is formed in the center of the lower end side thereof so that the plug body 8 can be detachably fitted to the upper end portion 7 of the annular body 4. Therefore, after the annular body 4 is fitted to the adapter 3 of the container body 1, the concave portion 9 of the stopper 8 is fitted to the upper end small diameter portion 7 of the annular body 4, whereby the waste liquid flow-down hole 5 of the annular body 4 is fitted. The inside of the container body 1 is cut off from the inside.
On the other hand, when the stopper 8 is moved upward to release the engagement with the annular body 4, the waste liquid flow-down hole 5 of the annular body 4 is opened in the container body and the inside of the container body located above the annular body 4 is opened. The waste liquid is configured to be discharged to the outside of the container body through the downflow hole 5.

Reference numeral 10 denotes a basket provided in the lower portion of the container body 1, and water passage holes (not shown) are formed in at least a part of the peripheral surface and the bottom portion thereof. Reference numeral 11 is a filter medium loaded inside the basket 10. It is preferable that the basket 10 is provided below the container body 1 in terms of compactness and processing efficiency of the apparatus, but it is not necessarily limited to this mode. For example, the basket is arranged at a position apart from the container body, and an adapter is provided. The waste liquid may be discharged from the container main body through a pipe-like object connected to the lower part.

The container body 1 is for treating the photosensitive resin component in the wash-out waste liquid so that the photosensitive resin component can be easily separated by filtration. In the wash-out waste liquid of the photosensitive resin plate supplied into the container body 1, During the pretreatment for filtration and separation of the resin component, the waste liquid flow-down hole 5 is closed by the plug body 8 so that the waste liquid does not flow out through the flow-down hole 5 to the basket 10.

As a pretreatment for efficiently filtering and separating the resin component from the wash-out waste liquid, a method of increasing the temperature of the wash-out waste liquid, a method of adding a coagulant for aggregating the resin component to the wash-out waste liquid, or the like, There is a method of performing these methods at the same time, and these methods are usually performed while washing out and agitating the waste liquid. If stirring is stopped and left to stand, the resin usually settles below the container body 1. On the other hand, the upper part of the resin usually forms a clear supernatant. Therefore,
It is desirable to set the length of the annular body 4 so that the upper end thereof is located above the settled resin.

After the resin has settled downward, the stopper 8 is moved to the upper portion, and the above-mentioned supernatant liquid level of the wash-out waste liquid is changed to the annular body 4.
Through the downflow hole 5 until reaching the upper end of the basket 10.
The supernatant liquid is supplied to the inside of the apparatus and is discharged to the outside of the system of the apparatus through the filtering material.

Next, the apparatus shown in FIG. 2 comprises an annular body 12 and a stopper body 13. The stopper body 13 has an annular body 1 at the lower center thereof.
2 has a cylindrical projection 14 which can be detachably fitted in the downflow hole 5, and the annular body 12 has the same structure as the annular body 4 except that the upper end side is not configured to have a small diameter. Anything is fine.

Further, the apparatus shown in FIG. 3 comprises an annular body 15 and a plug body 16, and a recess 17 is formed in the center of the upper portion of the annular body 15.
And a waste liquid passage hole 18 is formed which penetrates the side wall of the recess and opens to the outside. The plug 16 has a cylindrical structure that can be removably fitted in the recess 17 of the annular body 15. One end of the plug 16 is open to the center of the lower end, and the other end is a side surface of the plug. Inverted L-shaped pores 19 that open to the inside are formed.
It is configured such that the waste liquid passage hole 18 and the inverted L-shaped fine hole 19 can be communicated with each other by rotating the plug body 16 while being fitted in the concave portion 17 of No. 5. That is, the waste liquid passage holes 18 and the pores 19 are not communicated with each other until the washing waste liquid is pretreated and the resin is settled, and the plug body is formed to a position where the holes 18 and 19 overlap after the resin is settled. 16 is rotated so that the supernatant can be discharged from the device system through the hole 18, the hole 19 and the waste liquid flow-down hole 20 and the basket 10.

Although not shown, the basket can be configured to be housed in, for example, a container having a discharge hole at the center of the lower end, and the discharge hole can be communicated with the discharge system. In addition, a suction device or the like can be provided in the discharge system as needed.

By utilizing the connection structure of the annular body and the plug body as illustrated in FIGS. 2 to 3, the filtration time of the separated resin can be greatly shortened and the capacity of the basket can be reduced. Therefore, the entire device can be designed more compactly. In this way, after removing the supernatant liquid up to the upper end of the annular body or the connecting portion between the annular body and the plug body, the annular body is pulled out upward and the concentrated wash-out waste liquid containing the precipitated resin component is basketed. The liquid other than the solid component is discharged to the outside of the apparatus through the filter medium loaded in the basket, and the solid component is separated as a filter residue inside the filter medium. The separated resin is usually treated as industrial waste together with a filter material.

Instead of pulling the annular body upward, a cock may be opened to wash out the waste liquid to the basket. The basket used in the device of the present invention has a water passage hole in at least a part of the wall, but usually has a water passage hole in the entire surface of the wall. Specifically, a basket formed using a wire mesh, a basket formed using punching metal, or the like is preferable. As the material of each part used in the present apparatus, stainless steel or plastic material is usually used. A non-woven fabric such as rayon, polyester, polypropylene or the like is preferably used as the filtering material, and the mesh size (mesh) of the filtering material is usually 5 μ to 100 μ, but is not limited thereto.

Among the pretreatment methods for efficiently filtering and separating the resin component from the washing waste liquid, the temperature in the case of raising the temperature of the washing waste liquid is preferably in the range of 25 ° C to 90 ° C, more preferably 35 ° C. To 80 ° C. As the aggregating agent, a metal salt or a polymer aggregating agent is usually used. As the metal salt, sodium chloride, potassium chloride, sodium bromide, calcium chloride, aluminum sulfate, sodium sulfate and the like are preferably used. Further, as the polymer coagulant, a polymethyl methacrylate-based coagulant,
A typical example is a copolymer-based flocculant of maleic anhydride and methyl vinyl ether, but the present invention is not limited thereto. Further, the effect is further enhanced by increasing the temperature and adding the coagulant at the same time.

The apparatus of the present invention is widely applied to the treatment of waste liquid of water washable photosensitive resin plates such as photosensitive resin relief plates and photosensitive flexographic plates. Typical examples of such a photosensitive resin plate are the “Fuji Torelief” W type manufactured by Toray Co., Ltd., which is currently on the market, and Fuji Photo Film Co., Ltd., and the “Printite” which is manufactured and sold by Toyobo Co., Ltd. , ”And the like, but are not limited thereto.

[0020]

The present invention will be described in more detail with reference to the following examples.

Example 1 A container body having an inside length of 30 cm, a width of 40 cm, a height of 40 cm and a waste liquid hole with an adapter of 4 cm in diameter at the bottom, a height of 10 cm, an outer diameter of 4 cm, an inner diameter of 1.2 cm, and a height. 30cm, diameter 1.2c from bottom to 5cm
m, plug of 4cm diameter in other parts, inside length 25
cm, width 30 cm, height 18.5 cm, with a water passage hole with a diameter of 1 cm on the peripheral surface and the lower surface, and the area ratio of the water passage hole portion and the water passage hole-free portion is 1 to 1, An apparatus for treating the wash-out waste liquid of the water washable photosensitive resin letterpress plate, which was provided with a filter material having a mesh of 20 μm made of rayon nonwoven fabric, was prepared.

Next, except for the cover film of the water wash-out photosensitive resin letterpress "Fuji Treasure" WF95DII manufactured by Toray Co., Ltd. and sold by Fuji Photo Film Co., Ltd., a negative film was adhered to it and an ultraviolet fluorescent lamp was attached. It was irradiated with UV light from a distance of 50 cm for 5 minutes. Next, using a brush washing machine, washing out was performed in water at 25 ° C. for 3 minutes. 40 liters of washing waste liquid generated by this washing work
(Resin concentration 5wt%) in the container body, salt 1kg
Was added at room temperature, the mixture was stirred for 5 minutes, and then left for 12 hours. After 12 hours, the resin separated and deposited in the lower part of the container settled, and the uppermost part of the resin was below the upper end position of the annular body. The supernatant was almost transparent.

Next, the stopper was pulled out upward, the supernatant was introduced into the basket through the annular body, and discharged through the filter material to the outside of the system. The time required for this was about 3 minutes. Then, the annular body was pulled out upward to remove the supernatant, and the concentrated wash-out waste liquid was introduced into a basket together with the separated resin and left for 2 hours. As a result, 610 g of a resin component containing 1.21 of water (separation / removal rate of resin: 76%) was separated by filtration inside the filter material.

Example 2 Instead of the "Fujitorelief" WF95DII in Example 1, "Printite" E manufactured and sold by Toyobo Co., Ltd.
F95GC plate-making, washing waste liquid 40l (resin component ratio is 5 wt%) generated by washing work, heated to 50 ° C, transferred to the container body, and made a flocculant consisting of a copolymer of maleic anhydride and methyl vinyl ether. 500 g was added, stirred for 10 minutes and then left for 12 hours. After that, the same treatment as in Example 1 was performed to filter out 450 g of a resin component containing 1.5 l of water (resin separation and removal rate 56%).

[0025]

EFFECTS OF THE INVENTION Since the present invention is constituted as described above, it has a remarkable practical effect that the resin component can be remarkably simply and effectively removed from the washing waste liquid of the water washable photosensitive resin plate. Is.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of an apparatus according to the present invention.

FIG. 2 is a schematic cross-sectional view showing another example of the structures of the annular body and the plug body used in the present invention.

FIG. 3 is a schematic cross-sectional view showing still another example of the structures of the annular body and the plug body.

[Explanation of symbols]

 1: Container body 2: Waste liquid hole 3: Adapter 4,12,15: Annular body 8,13,16: Plug body 10: Basket 11: Filtration material

Claims (1)

(57) [Claims] 1. Washing out with water comprising a container body having a drainage hole at the bottom, and a basket provided corresponding to the container body, having a water passage hole at least at the bottom and having a filter medium inside. Is a cleaning liquid waste treatment device for a photosensitive resin plate, which is detachably attached to the waste liquid hole in the container body,
An annular body having a waste liquid flow-down hole therein and a plug body detachably attached to the upper part of the ring-shaped body are provided, and the plug body can seal the flow-down hole in a mounted state, and can rotate or A washing liquid waste treatment apparatus for a photosensitive resin plate, characterized in that the upper end of the flow-down hole is opened into the container body by engagement and disengagement with the annular body.