JPH04219189A - Treating equipment and treatment for treated waste liquid of nonsilver salt photosensitive material - Google Patents

Abstract

PURPOSE:To stabilize operation in a long time and to improve workability in an equipment and a method for heating the treated waste liquid of nonsilver salt photosensitive material in a heating and concentrating kiln and separating it into a liquid component and concentrate. CONSTITUTION:A treatment equipment for the treated waste liquid of nonsilver salt photosensitive material is equipped with a means for heating this treated waste liquid in the reduced pressure conditions to vaporize and concentrate it, a means for cooling and condensing the vapor generated thereby and a means for storing this condensate. A controlling means is added to the treatment equipment so that actuation is automatically performed in a time for starting operation of this treatment equipment and in a time for finishing operation thereof. Further a treating method is obtained so that the treatment equipment is used and operation is automated until a time for finishing operation of this treatment equipment from a time for starting operation thereof.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to waste liquid (
The present invention relates to a processing apparatus for processing waste liquid (hereinafter referred to as "processed waste liquid"), and more specifically relates to an apparatus and method used to heat and concentrate the processed waste liquid and separate it into solid content and water.

0002

BACKGROUND ART Conventionally, methods for treating waste liquid from processing of photosensitive lithographic printing plates in which a photosensitive layer using a non-silver salt photosensitive material such as a diazo compound, o-quinone diazide, etc. as a photosensitive component is provided on a support are as follows: The only methods available are to have a waste liquid treatment company take over the treated waste liquid or to spend a large amount of money to build a waste liquid treatment facility and process it, which poses problems in the workability and cost of processing the treated waste liquid.

[0003] In order to improve this problem, the treated waste liquid is heated and concentrated in an evaporator to remove water and solids (sludge).
Although several methods have been proposed for separating the two, there is still no known control means for automatically performing these processing steps.

0004

OBJECTS OF THE INVENTION The first object of the present invention is to provide a technology for treating waste liquid of non-silver salt photosensitive materials by heating it in a heating concentrator and separating it into water and solids, which can be operated stably for a long period of time. The second object is to provide a processing technology that improves the workability of processing the above-mentioned treated waste liquid.

[0005]

DESCRIPTION OF THE INVENTION The above objects of the present invention are achieved by the following processing apparatus (1) and the following processing method (2).

(1) A non-silver photosensitive material equipped with means for heating and evaporating and concentrating the processing waste liquid of non-silver salt photosensitive materials under reduced pressure conditions, means for cooling and condensing the resulting vapor, and means for storing the condensed liquid. A processing apparatus for processing waste liquid of non-silver salt photosensitive materials, characterized in that the processing apparatus includes a control means for automatically performing operations at the start and end of operation of the processing apparatus. .

(2) Processing waste liquid for non-silver salt photosensitive materials, characterized in that the processing apparatus described in (1) above is used, and the operations of the processing apparatus are automatically performed from the start of operation to the end of operation. processing method.

The present invention will be explained below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of a processing apparatus according to the present invention. In this figure, 1 is a processing waste liquid tank that holds the processing waste liquid discharged from the processing equipment (not shown), and 2 is a liquid level sensor that detects the liquid level of the processing waste liquid in the processing waste liquid tank 1. is detected, and a control mechanism (not shown) replenishes the processing waste liquid, activates an alarm device, or stops the operation of the processing device. 3 is an evaporation pot that heats the treated waste liquid to evaporate and concentrate water, etc.;
4 is a pipe that sends the treated waste liquid in the treated waste liquid tank 1 to the evaporator 3; 5 is a filter installed in the middle of the pipe 4 to remove dispersion in the treated waste liquid; 6 is a solenoid valve; and 7 is a heating unit for heating the treated waste liquid. A heating member that generates heat when energized to
It has a helical heating section suspended from the top. Reference numeral 10 denotes a liquid level detection unit for detecting the liquid level of the treated waste liquid in the evaporation pot 3. A communication pipe 11 is provided outside the side wall of the evaporation pot 3, and a liquid level sensor 12 is installed inside the communication pipe 11. The liquid level detection signal detected by the liquid level sensor 12 is input to a control mechanism (not shown), and a timer (not shown) controls the opening and closing of the solenoid valve 6 with an arbitrary time lag, and the liquid is transferred from the treated waste liquid tank 1 to the evaporation pot 3. The inflow of the treated waste liquid is controlled, and the evaporation pot 3
The liquid level inside is maintained within a certain range.

Reference numeral 15 is an air cooler for cooling and condensing the vapor evaporated from the treated waste liquid in the evaporator 3, and 16 is a fan for cooling the air cooler 15. Reference numeral 18 denotes a sludge recovery tank for storing the concentrate (sludge) produced by heating and concentrating the treated waste liquid in the evaporator 3, and 19 a sludge discharge valve ( (preferably a butterfly valve); 20 is a pipe for releasing the treated waste liquid in the evaporator 3 to the sludge recovery tank 18 when bumping occurs in the evaporator 3; 21 is a solenoid valve provided in the middle of the pipe 20; It is.

In the evaporator 3, a reference numeral 23 allows air to flow into the evaporator 3 in order to improve the flow of fluid in the pipe that carries the steam from the evaporator 3 to the air cooler 15 and to eliminate clogging of the pipe. 24 is a solenoid valve for adjusting the intake amount of air from the air suction port 23 or shutting it off as necessary; 25 and 26 are liquid level sensors for detecting the liquid level in the evaporating pot 3; When the exhaust pump 33 or the electromagnetic valve 6 fails, an abnormality in the liquid level is detected and the operation of the processing apparatus is stopped by a control mechanism (not shown). 27 is a temperature sensor that detects the temperature of the upper cavity inside the evaporator 3 in order to prevent accidents such as bumping when an overheating abnormality occurs inside the evaporator 3 during operation, and detects the detected temperature. When the temperature reaches a predetermined value or higher, the solenoid valve 21 is opened to discharge the liquid in the evaporator 3 to a recovery tank, and at the same time the solenoid valve 24 is closed to prevent the liquid in the evaporator 3 from overflowing to the outside. It is composed of 30 is a liquid receiver into which the liquid condensed in the air cooler 15 is placed, and 31 is a recovery tank 32 for collecting the liquid in the liquid receiver 30.
The liquid sending pump 33 is an exhaust pump for reducing the pressure inside the evaporating pot 3 and sucking the vapor evaporated in the evaporating pot 3 into the air cooler 15. 35 is a liquid level sensor, and when the liquid level detects the upper limit of a predetermined range, the recovery pump 31 is activated, and when the lower limit is detected, the operation of the recovery pump 31 is stopped. 36 is also a liquid level sensor, and the liquid level is the liquid level sensor 3.
When an abnormality reaching 6 occurs, the operation of the device is stopped. 37 is a temperature sensor and air cooling fan 1
This is to stop the operation of the device when high-temperature fluid that is not condensed enters the liquid receiver 15 due to a failure of the liquid receiver 15 or the like. Reference numeral 38 denotes a liquid level sensor provided in the recovery tank, which detects the upper limit of the liquid level in the recovery tank 32 and activates an alarm device (not shown) or the like.

Next, the operation of the example device shown in FIG. 1 will be explained.

First, processing waste liquid discharged from a processing apparatus for non-silver salt photosensitive materials is put into a processing waste liquid tank 1. Due to the operation of the exhaust pump 33, the pressure inside the evaporating pot 3 is reduced,
The treated waste liquid in the treated waste liquid tank 1 is sent to the evaporation pot 3 through the pipe 4, but this is done by controlling the opening and closing of the solenoid valve 6 by the liquid level sensor 12 and a control mechanism (not shown). The flow of liquid into the evaporation pot 3 is controlled, and the treated waste liquid flows into the evaporation pot 3 until the liquid level in the evaporation pot 3 falls within a certain range, after which the liquid level falls within a certain range. The opening and closing of the solenoid valve is controlled as follows. The pressure conditions in the evaporator 3 are such that the pressure in the upper cavity in the evaporator 3 is 0 to -7.
A suitable range is 0 cmHg, more preferably a range of -20 to -60 cmHg.

The treated waste liquid sent to the evaporator 3 is heated by a heating member 7. Gas that has been heated and evaporated from the treated waste liquid is sent to the air cooler 15 together with the air sucked from the upper part of the evaporator 3 through the solenoid valve 24, where it is condensed and stored in the receiver 30, and the gas that is not condensed is sent to the exhaust pump. 33 and is released to the outside. The liquid contained in the liquid receiver 30 is sent to a recovery tank 32 by a liquid sending pump 31.

In such a process, the liquid level of the treated waste liquid in the evaporator 3 gradually decreases due to evaporation;
The liquid level is detected by a liquid level sensor 12, and the operation of the electromagnetic valve 6 is controlled so as to maintain a constant liquid level range.

Furthermore, if an overheating state or bumping occurs in the evaporator 3 for some reason, the temperature sensor 27 detects an abnormal temperature in the upper cavity of the evaporator 3, and a control mechanism (not shown) turns on the solenoid valve. 21 and 24 open, evaporating pot 3
The liquid inside is discharged to the sludge collection tank 18, and at the same time, the air inlet 23 is closed and the liquid is discharged from the evaporation pot 3.
The liquid inside is prevented from overflowing to the outside of the evaporation pot 3. Also,
When the temperature sensor 37 detects an abnormality in the temperature inside the liquid receiver 30, the operation of the processing device is stopped by a control mechanism (not shown).

FIG. 2 is a front view showing a panel for operating the processing apparatus provided on the outer surface of the main body of the processing apparatus housing the processing apparatus.

100 is the main body of the processing device, 101 is a control cover provided with an operation panel, and 102 is a cover that is opened and closed when replacing the sludge collection tank 18 inside the main body 100, all of which are connected by hinge members (not shown). It is attached to the main body 100 so that it can be opened and closed. 101a, 10
1b is a handle for opening and closing. 103 is a main switch for the entire processing device, and is provided inside the control cover 101 when it is opened. 104 is a start button for operating the processing device; 105 is an end button for stopping the operation;
106 is a key that indicates energization of the heating member 7 by lighting and blinks when an abnormality occurs; 107 is a key that indicates an abnormality detected by the liquid level sensor 25 and the temperature sensors 27 and 37;
Reference numeral 8 indicates a key that indicates an abnormal drop in the liquid level in the evaporation pot 3 detected by the liquid level sensor 26, and 109 is a lamp that blinks when the treated waste liquid in the treated waste liquid tank 1 is empty, which is detected by the liquid level sensor 2. It is activated based on the detection results. Reference numeral 110 is a key that flashes when the liquid level in the recovery tank 32 reaches the upper limit, and is activated according to the result of the liquid level detection by the liquid level sensor 38. Reference numeral 111 is a key that indicates replacement of the sludge recovery tank 18 by blinking a lamp when the set operating time (the operating time corresponds to the concentration ratio) has been reached.

Next, the operation of the control means of the apparatus shown in FIG. 1 will be explained according to the flowcharts shown in FIGS. 3 and 4.

FIG. 3 is a flowchart showing an outline of the operation at the start of operation of the processing device. After putting the processing waste liquid discharged from the automatic developing machine into the processing waste liquid tank 1, turn on the main switch 103 (200), set the operating time if necessary, and press the start button 205 (200).
1), the solenoid valves 6 and 24 open (202), then the exhaust pump 33 operates (203), air is introduced into the evaporation pot 3 from the air intake port 23, and the exhaust pump 33 is introduced from the upper part of the liquid receiver 30. However, the pressure inside the evaporator 3 is lower than that of the outside air, and as a result, the treated waste liquid is automatically discharged from the evaporator 3.
Supply to the interior will begin. Next, the liquid level control mechanism of the evaporating pot 3 is activated (204). When it is detected by the liquid level sensor 12 that the liquid level of the treated waste liquid in the evaporating pot 3 has reached a predetermined height (205), electricity is started to be applied to the heating member 7 (
206), and the operation of the fan 16 is started (20
7) Heat concentration is started. The liquid level control mechanism operates when the liquid level in the evaporating pot 3 is detected to have reached a predetermined height by the liquid level sensor 12, a timer is activated, and after a predetermined time (for example, 2 seconds or more), The solenoid valve 6 closes, and the supply of treated waste liquid to the evaporation pot 3 is stopped. When the liquid level is no longer detected by the liquid level sensor 12, the electromagnetic valve 6 opens after a predetermined time (for example, 2 seconds or more), and the treated waste liquid in the treated waste liquid tank 1 is supplied into the evaporation pot 3. Evaporation pot 3 by heating concentration
When the treated waste liquid in the evaporator 3 evaporates and the liquid level drops, the above operations are repeated to maintain the liquid level in the predetermined range and the heating concentration process of the treated waste liquid proceeds.

The vapor evaporated from the evaporating pot 3 is cooled and condensed by the air cooler 15, and the condensed liquid is collected in the receiver 30. When the liquid level sensor 35 installed inside the liquid receiver 30 detects that the liquid level is at the upper limit of a predetermined range, the recovery pump 31 is activated to send the condensed liquid to the recovery tank, and when the lower limit is detected, the recovery pump 31 is activated. stops. This operation is continuously and automatically performed during processing.

FIG. 4 is a flowchart showing an outline of the operation when the processing apparatus finishes operating. When you want to end the operation of the processing device, press the end button 105 (300), the power supply to the heating member 7 is stopped (301), and the timer is automatically activated for a predetermined period of time (preferably about 1 hour). After the elapse of time, the power supply to the exhaust pump 33, recovery pump 31, and fan 16 is turned off, and their operation stops (30
2, 303, 304). Further, the electromagnetic valves 6 and 24 are closed simultaneously, and finally the main switch 103 is turned off (305), the leak valve is opened, the reduced pressure state is released, and the operation is ended.

In the present invention, as the evaporation pot, a cylindrical pot made of metal having a protective film such as stainless steel or fluororesin (eg, Teflon) can be used. As the heating member used to heat the treated waste liquid in the evaporator, a processed heater such as a nichrome wire, a quartz heater, a Teflon heater, a cartridge heater, a rod-shaped heater, or a panel heater can be used. The volume of the portion of the evaporator that accommodates the treated waste liquid is suitably 1 to 10 liters per kW of power supplied to the heating member, preferably 1 to 10 liters per kW of power supplied to the heating member.
．． It is 0 to 5 liters. In addition, in order to prevent bubbles from flowing out and bumping, the volume of the upper cavity is preferably 0.5 to 4 times the volume of the treated waste liquid storage section, more preferably 0.7 to 2.
It is 5 times more. The piping from the treated waste liquid tank to the evaporator is preferably made of a material that is resistant to acids and alkalis.

The means for condensing the vapor evaporated in the evaporator is not limited to the air cooler as described above, but various heat exchange means can be used.

[0025] When the treated waste liquid contains a dispersion of a polymer compound, it is preferable to remove this in advance with a filter and introduce it into the evaporation vessel. This prevents the solids generated from the treated waste liquid from becoming viscous due to heating by the heat generating member inside the evaporator. The processing waste liquid to which the present invention is applied includes developer solutions for negative and positive photosensitive lithographic printing plates (PS plates) using diazo resins, o-quinone diazide compounds, photopolymers, etc. as photosensitive substances, and washing water. , waste liquids such as desensitizing treatment liquids are included.

[0026]

EXAMPLES The method of the present invention will be explained in more detail in the following examples.

The treated waste liquid is as follows.

[0028] Using a processing waste liquid automatic processor PSU-820 (manufactured by Konica Corporation),
Water discharged during the development process using SD-32 (common negative/positive developer, manufactured by Konica Corporation) as the developer for the 23rd edition of the positive PS plate (Kikuzen) and the 22nd edition of the negative PS plate. It was treated as waste liquid. The components contained in the washing waste liquid are positive PS
In the case of plates, phenolic resins contained in the photosensitive layer of PS plates,
Dye, etc., aluminum eluted from the support, potassium silicate in the developer, nonionic surfactant, etc. In the case of a negative PS plate, acrylic resin, dye, etc. contained in the photosensitive layer of the PS plate, support These include aluminum eluted from the body, alcoholic solvents in the developer, organic amines, anionic surfactants, etc. The pH of the washing waste liquid was approximately 8, and the viscosity was 1.05 cP (BL viscometer (Tokyo Keiki Seisakusho)).

The above treated waste liquid was treated using the treatment apparatus shown in FIG. The capacity of the evaporation pot 3 was 8 liters for storing treated waste liquid, and 8 liters for the volume of the upper space. A semiconductor heater was used as the heating member 7, and electricity was applied at 100 V AC and 10 A. The pressure inside the evaporation pot 3 was set at 35 to 42 cmHg.

As a result, extremely stable processing could be performed with simple operations from the start to the end of operation.

[0031]

According to the present invention, the workability of the processing operation is improved, in which waste liquid from processing non-silver salt photographic materials is heated and concentrated under reduced pressure in an evaporator to separate it into water and solids.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an example of a processing device according to the present invention, and FIG.
The figure is a front view showing the operation panel of the processing device, FIG.
FIG. 4 is a flow chart showing an outline of the operation of the control means of the present invention.

[Explanation of symbols]

1... Processing waste liquid tank 2, 25, 26, 35, 36, 38... Liquid level sensor 3
... Evaporation pot 6, 21, 24 ... Solenoid valve 7 ... Heating member 15 ... Air cooler 16 ... Fan 18 ... Sludge recovery tank 27, 37 ... Temperature sensor 30 ...・Liquid receiver 32...Recovery tank 33...Exhaust pump

Claims (2)

[Claims] Claim 1: A non-silver salt comprising means for heating and evaporating and concentrating the processing waste liquid of non-silver salt photosensitive materials under reduced pressure conditions, means for cooling and condensing the vapor generated thereby, and means for storing the condensed liquid. In processing equipment for processing waste liquid of photosensitive materials,
A processing apparatus for processing waste liquid of non-silver salt photosensitive materials, characterized in that the processing apparatus has a control means that automatically performs operations at the start and end of operation of the processing apparatus. 2. A method for processing waste liquid from processing non-silver salt photosensitive materials, comprising using the processing apparatus according to claim 1 and automatically performing operations from the start of operation to the end of operation of the processing apparatus. .