JP2002055416A - Method of processing waste photographic processing liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drastically reduce a cost for treating a processing liquid and to eliminate the need for an occupying space of a tank for storing the processing liquid for a specified period or the like. SOLUTION: This method consists of a storage process step A for storing the waste liquid 1 used for processing in a storage means 3, a distillation treating process step B for separating the waste liquid to steam 12 and insoluble materials 13 by a distilling means, a cooling process step C of guiding the evaporated steam 12 to a cooling means 20 and cooling the steam to form distilled water 21 by this cooling means, a diluting process step D of introducing the distilled water 21 and the cooling water 26 to the diluting means 40 and diluting the distilled water, an adsorption treating process step E for removing the dissolution ions 50, etc., included in the diluted diluting water 41 and a waste water managing process step F for housing the non-polluting water 60 obtained by the adsorption treating process step into a waste water managing means 62 having a water quality sensor 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a photographic film,
The present invention relates to a method for processing a photographic processing waste liquid suitable for processing a waste liquid that has been subjected to development and fixing processing of photographic paper.

[0002]

2. Description of the Related Art When a used film is subjected to processing such as development and printing in a photographic developing station, a developer and a fixing solution (hereinafter, also referred to as "processing solution") are generally used. . This processing solution cannot be reused and is stretched (D.
P. E) Every time the treatment is completed, it must be disposed of as a waste liquid.

[0003] By the way, when the treatment liquid is disposed of, offshore speculation is prohibited from the viewpoint of environmental conservation. Therefore,
At present, a large amount of processing liquid generated in each development site or the like is collected by a specialized trader for a fee, and is collectively processed.

Under the circumstances described above, at present, a photographic developing company pays for a processing solution and requests a professional company, and a system in which the processing solution must be stored in a tank in a developer for a certain period of time. We expect the emergence of a method or device that solves the above problem.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned demands of the prior art, the object of the first embodiment is to convert a processing solution generated in a developing station or a plate making station into harmless water on the spot. It can be treated and discharged into sewage. This significantly reduces the cost of processing the processing solution,
An occupied space such as a tank for storing the processing liquid for a certain period of time becomes unnecessary. Next, the purpose of the second embodiment is to provide an insoluble substance (slurry:
Silver oxide contained in the fluidized precipitate or colloidal substance). Next, an object of the third embodiment is that the fixing system and the developing solution can be alternately distilled by using the same hardware system used in the first embodiment.

[0006]

According to the present invention, there is provided a method for treating a photographic processing waste liquid, comprising: a storage step A for storing a processed waste liquid 1 used for photographic processing in a storage means 3;
To the distillation means 11, the distillation means B separates the water vapor 12 and the insoluble substance 13 by the distillation means, and the evaporated water vapor 12 is guided to the cooling means 20, and the distilled water 21 is converted to the distilled water 21 by the cooling means. A cooling step C, a diluting step D for guiding the distilled water 21 and the cooling water 26 to the diluting means 40 to dilute the distilled water, and a dissolved ion 50 contained in the diluted dilution water 41. An adsorption process E for removing the odor 51 via the adsorption device, and a drainage management process F for storing the harmless water 60 obtained by the adsorption process in a drainage management unit 62 having a water quality sensor 61. It is characterized by the following.

[0007] In the above configuration, a silver recovery step G for recovering silver oxide through a silver recovery apparatus 70 equipped with a silver recovery means 71 for recovering silver contained in the insoluble substance generated in the distillation processing step B. Is added.

Further, the method for treating a photographic processing waste liquid according to the present invention comprises:
A storing step A for storing the processed fixing waste liquid 1 used for the photographic processing in the first storing means 3 and a storing step A1 for storing the processed developing waste liquid 1A also used for the photographic processing in the second storing means 3A. Control means 80 having an electric control circuit
The stored fixing waste liquid 1 and developing waste liquid 1A are alternately guided to a distillation means 11 based on an electromagnetic valve 15 which is controlled at predetermined time intervals.
A distillation treatment step B for separating the vaporized water vapor 12 into the cooling means 20, and a cooling step C for forming distilled water 21 by the cooling means 20; Dilution step D for distilling distilled water leading to 26
And an adsorption treatment step E for removing dissolved ions 50 or odors 51 contained in the diluted dilution water 41 through the plurality of adsorption means 52 and 53, and a harmless harmless substance obtained by the adsorption treatment step. And a drainage management step F for storing the water 60 in a drainage management means 62 having a water quality sensor 61.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a method of treating a photographic processing waste liquid according to a first embodiment. FIG. 2 schematically shows a connection relationship between each hardware portion such as a detecting means, an electromagnetic valve, a pump, and a layer used in the first embodiment.

First, A is a storage step of storing the treated waste liquid 1 used for the photographic processing in a storage means (storage layer) 3 provided with a first water level sensor 2. Before the storage step A, a liquid receiving layer 4 that receives the treated waste liquid 1 in advance may be prepared, and the waste liquid 1 may be guided from the liquid receiving layer 4 to the storage layer 3. In this case, the liquid level sensor 5 may be provided also in the liquid receiving layer 4 so that the storage layer 3 and the liquid receiving layer 4 have an overflow-like relationship.

In the present embodiment, the treated waste liquid 1 means, for example, a fixing liquid used in a photo developing station. The fixer is also disposed of as a waste liquid together with a developer described later. Here, the used fixing solution 1 used for fixing a photographic film or photographic paper is directly or indirectly put into the storage layer 3. The first pipe 6 serving as a guide means for connecting the liquid receiving layer 4 and the storage layer 3 is provided with a first pump 7 for pumping the waste liquid 1 in the liquid receiving layer 4 to the lower storage layer 3. ing.

Next, B is directed to a distillation means (distillation layer) 11 provided with a second water level sensor 10 for guiding the stored waste liquid 1 to separate it into steam 12 and an insoluble substance 13 by the distillation means 11. This is a processing step. Second water level sensor 10
Is provided in consideration of the relationship of the liquid level of the distillation layer 11. That is, in this embodiment, the waste liquid 1 in the storage layer 3 flows into the distillation layer 11 in correlation with the predetermined liquid level of the distillation layer 11. For this purpose, an electromagnetic valve 15 for controlling the liquid feed is provided in the second pipe 14 as a guide means for connecting the storage layer 3 and the distillation layer 11. The second pipe 14 is provided with a second pump 16 for pumping the waste liquid 1 in the storage layer 3 to the lower distillation layer 11.

The distillation layer 11 has a heating means 17 such as a heater or dielectric heating. The heating means 17 heats and evaporates the waste liquid that has entered the distillation bed 11,
2 and an insoluble substance 13. The water vapor (distilled gas) 12 contains components of vaporized chemicals. Further, the insoluble substance 13 is discharged out of the distillation layer 11 by a discharging means (not shown) such as a pipe or a solenoid valve provided appropriately in the distillation layer 11.

Next, C is a cooling step in which the evaporated water vapor 12 is guided to a cooling means (cooling layer) 20 and is converted into distilled water 21 by the cooling means 20. FIG. 3 shows an example of the cooling means 20 used in the cooling step C. Therefore, the cooling means 20 will be described with reference to FIG. 3. Reference numeral 22 denotes a vertically long and thick tubular cooling pipe main body, for example, a glass tube having a slightly larger diameter or an electronic cooler is used. 23 is a tubular water vapor inlet provided at the upper end of the cooling pipe main body 22; 24 is a tubular distilled water outlet provided at the lower end of the cooling pipe main body 22; A spiral guide cooling thin tube provided in communication with the discharge portion 24;
Cooling water filled between the outer wall of the cooling pipe body 5 and the inner wall of the cooling pipe main body 22; 27 is a cold water suction part for introducing cooling water into the cooling pipe main body 22; Is a cold water discharge unit for discharging the cooling water 26 that has cooled the cooling water.

In the present embodiment, tap water is used as the cooling water 26. Therefore, reference numeral 30 is
A cold water guide pipe for guiding the tap water 26 into the cooling pipe main body 22.
1 and an electromagnetic valve 32 for controlling the chilled water supply are provided as appropriate. Reference numeral 34 denotes a third pipe serving as a guide unit for connecting the distillation unit 11 and the cooling unit 20.

Next, D is a dilution step in which the distilled water 21 and the cooled cooling water 26a are led to the diluting means (diluting layer) 40 to dilute the distilled water 21. This dilution step D
Thereby, the dilution water 41 in which the distilled water 21 and the cooled cooling water 26a are mixed is obtained. It is desirable to attach a level control means 42 for controlling the water level of the dilution water 41 to the dilution layer 40 as shown in FIG. In this case, the lower fourth pipe 43 connected to the dilution layer 40 is provided with a control valve 44 for controlling the feed of the dilution water 41 based on the control signal of the level control means 42.

Next, E is an adsorption process for removing dissolved ions 50 or odors 51 contained in the diluted water 41 through a plurality of adsorption means 52 and 53. In this embodiment, as shown in FIG. 4, the first adsorption means 52 is connected to the dilution means 40 via the fourth pipe 43. The fourth pipe 43 is provided with a fourth pump 54 for pumping the dilution water 41 in the dilution unit 40 to the first adsorption unit 52. Also, the second suction means 53
Is connected to the first suction means 52 via a fifth pipe 55.

Thus, the first adsorption means 52 has a function of absorbing the dissolved ions 50 contained in the diluted water 41, while the second adsorption means 53 has a function of absorbing the odor of the diluted water 41. Has the function of absorbing In addition, the order of the first suction unit 52 and the second suction unit may be interchanged,
It is desirable to provide a suitable control valve 56 also in the fifth pipe 55.

F is a drainage management step of storing the harmless water 60 obtained in the adsorption step E in a drainage management means (drainage management layer) 62 provided with a water quality sensor 61.

The water quality sensor 61 is a means for detecting contamination (for example, water color) of the harmless water 60, and is opposed to a channel-shaped support frame 63 incorporated in the drainage management layer 62 as shown in FIG. A light projecting portion 64 attached to each of the walls 63a and 63b, and a light receiving portion 65 for the light projecting portion 64
And

Then, in the final step, the harmless water 60 judged to be "OK" by the drainage management means 62 is discharged to the sewage.

[0022]

Next, a second embodiment and a third embodiment shown in FIGS. Since these embodiments are based on the main part of the first embodiment, in the description of each embodiment, the same parts as those of the first embodiment are denoted by the same or similar reference numerals, and are repeated. The description of the operation will be omitted.

FIGS. 6 and 7 show a second embodiment. The second embodiment is different from the first embodiment mainly in that:
Silver oxide is recovered through a silver recovery device 70 equipped with a silver recovery means 71 for recovering silver contained in the insoluble substance (slurry: fluid precipitate or colloidal substance) generated in the distillation processing step B. That is, a silver recovery step G is added.

In the second embodiment, however, as shown in FIG. 7, the insoluble substance storage layer 72 for storing the insoluble substance 13a containing no silver oxide and the insoluble substance pipe 73 connecting the distillation means 11 are provided with: A box-shaped silver recovery device 70 internally including a removable silver recovery means 71 is fixedly provided. In the present invention, a detailed description of the specific configuration of the silver recovery device 70 is omitted, but, for example, the box-shaped silver recovery device 70 is formed of a non-magnetic heat-resistant resin material, and the silver recovery device 70 is formed of a box body. And a lid. Then, the magnetic body 74 of the S pole and the N pole is opposed to the outer peripheral wall of the silver recovery device 70 to form a magnetic field in the silver recovery device 70. On the other hand, the silver collecting means 71 which is removably mounted in the silver collecting device 70 is formed of a multilayer or laminated net made of, for example, iron wire.

In the above configuration, when the waste liquid 1A is a fixing waste liquid, the insoluble substance 13 generated in the distillation treatment step B reacts with the oxygen contained in the water by the ionized silver contained in the fixing liquid to oxidize. It becomes silver and colloidal. When the colloidal insoluble substance 13 passes through the cylindrical silver recovery device 70, colloidal silver collects in the silver recovery means 71, which is an iron-based metal in a magnetic field. Then, by opening the cover of the silver collecting device 70 as appropriate and taking out the silver collecting means 71, it is possible to take out the colloidal silver.

In the second embodiment, the insoluble material 1 containing no silver oxide recovered in the insoluble material storage layer 72 is used.
3a is then subjected to a drying step H, and finally put into an incinerator 75. Here, one of the effects of the invention of the second embodiment is pointed out. For example, when an electromagnetic valve 76 is attached to an appropriate portion of the insoluble substance pipe 73 for automatic control, silver adheres to the valve seat of the electromagnetic valve 76. Can be prevented.

FIGS. 8 and 9 show a third embodiment. The third embodiment differs from the first embodiment mainly in that:
The second storage step A1 for storing the developing waste liquid 1A is added so that the hardware system used in the method of the first embodiment can be commonly used.
Accordingly, reference numeral 1 denotes a fixing waste liquid, and reference numeral A denotes a first storage step of storing the fixing waste liquid.

In the above construction, a system for storing the fixing waste liquid 1 and a system for storing the developing waste liquid 1A are provided in parallel, and the control means 80 having an electric control circuit controls the solenoid valve 15 as shown in FIG. Control. In this case, the control means 8
When the control by 0 is performed, for example, the valve is switched every hour, the distillation processing step B alternately distills the fixing waste liquid 1 and the developing waste liquid 1A based on the alternate operation. Note that reference numeral 3A
Is a second storage means (reservoir).

[0029]

As apparent from the above description, the present invention has the following effects. (1) The processing liquid generated in the developing station or the plate making station can be processed into harmless water on the spot, and the harmless water that is recognized as “OK” in the wastewater management process can be discharged to the sewage. Therefore, unlike the related art, the cost for processing the processing liquid is significantly reduced, and the space occupied by a tank or the like for storing the processing liquid for a certain period of time becomes unnecessary. (2) In the first embodiment, silver oxide contained in the insoluble substance generated in the distillation step can be extracted. In this case, there is an advantage that silver does not adhere to the valve seat of the solenoid valve provided in the lower pipe. (3) In the third embodiment, the fixing waste liquid and the developing waste liquid can be alternately distilled by using the hardware system used in the first embodiment in common. Therefore, it is economical.

[Brief description of the drawings]

1 to 9 are explanatory views showing first to third embodiments of the present invention.

FIG. 1 is a process chart of a first embodiment.

FIG. 2 is a schematic explanatory view showing a connection relationship of each means used in the first embodiment.

FIG. 3 is a schematic explanatory view showing a relationship between a cooling unit and a dilution unit.

FIG. 4 is a schematic explanatory view showing a relationship between a dilution unit and an adsorption unit.

FIG. 5 is a schematic explanatory view showing the relationship between the suction means and the discharge management means.

FIG. 6 is a process chart of the second embodiment.

FIG. 7 is a schematic explanatory diagram showing a connection relationship of each means used in the second embodiment.

FIG. 8 is a process chart of the third embodiment.

FIG. 9 is a schematic explanatory diagram showing a connection relationship of each means used in the third embodiment.

[Explanation of symbols]

A, A1: storage step, B: distillation step, C: cooling step, D: dilution step, E: adsorption step, F: wastewater management step, G: silver recovery step, 1, 1A: waste liquid, 3, 3A: storage means, 10: second water sensor, 11: distillation means, 12
... water vapor, 13 ... insoluble substance, 14 ... second pipe, 15 ...
Solenoid valve, 16: second pump, 17: heating means, 20: cooling means, 21: distilled water, 26: cooling water, 40: diluting means, 41: diluted water, 50: dissolved ions, 51: odor,
52, 53: adsorption means, 60: harmless water, 61: water quality sensor, 62: wastewater management means, 70: silver recovery device, 71
... Silver recovery means, 72 ... Insoluble substance storage layer, 73 ... Pipe for insoluble substance, 74 ... Magnetic substance, 75 ... Incinerator, 76 ... Solenoid valve.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/04 ZAB C02F 1/04 ZABC 1/28 1/28 A 1/48 1/48 A 9/00 502 9/00 502B 502H 502L 503 503G 504 504B 504E

Claims (4)

[Claims] 1. A storage step A for storing the treated waste liquid 1 used for photographic processing in a storage means 3, and the stored waste liquid 1 is guided to a distillation means 11, where the water vapor 12 and the insoluble substance 13 A distillation treatment step B for separating the vaporized water vapor 12 into the cooling means 20, and a cooling step C for forming distilled water 21 by the cooling means 20; 26, a diluting step D for diluting distilled water, and adsorbing means 52, 5 for dissolving dissolved ions 50 or odors 51 contained in the diluted diluted water 41.
3. A photographic processing waste liquid treatment comprising: an adsorption treatment step E for removing the harmless water 60 obtained through the adsorption treatment step through a wastewater management means 62 provided with a water quality sensor 61; Method. 2. The silver for recovering silver oxide through a silver recovery device 70 provided with a silver recovery means 71 for recovering silver contained in the insoluble substance generated in the distillation step B, according to claim 1. A method for treating a photographic processing waste liquid, wherein a recovery step G is added. 3. The silver collecting device 70 according to claim 2, wherein the silver collecting device 70 is provided with a magnetic body 74 for forming a magnetic field therein, while the silver collecting means 71 is formed in a net-like shape of an iron-based material. A method for treating waste photographic processing liquid. 4. A storing step A for storing the processed fixing waste liquid 1 used for the photographic processing in the first storing means 3, and storing the processed developing waste liquid 1A also used for the photographic processing in the second storing means 3A. The stored fixing waste liquid 1 and the developing waste liquid 1A are alternately guided to the distillation means 11 based on the storage step A1 to be performed and the solenoid valve 15 controlled at predetermined time intervals by the control means 80 having an electric control circuit. A distillation step B for separating the water vapor 12 and the insoluble substance 13 into water, a cooling step C for guiding the evaporated water vapor 12 to the cooling means 20 and forming the distilled water 21 with the cooling means, and a diluting means 40. To the distilled water 21 and the cooling water 26 to dilute the distilled water, and remove dissolved ions 50 or odors 51 contained in the diluted diluted water 41 through the adsorption means. Adsorption treatment A wastewater management step F in which the harmless water 60 obtained in the adsorption step is stored in a wastewater management means 62 having a water quality sensor 61.