Wastewater treatment system for a plate processing machine

Abstract

The utility model relates to a plate making machine sewage discharge technical field especially relates to a plate making machine wastewater treatment system, include: first -level processing mechanism, second -level processing mechanism, third -level processing mechanism, fourth -level processing mechanism and developing waste liquid processing mechanism, the import end of first -level processing mechanism is linked together with the discharge port of plate making machine ordinary sewage, the import end of second -level processing mechanism is linked together with the export end of first -level processing mechanism, the import end of third -level processing mechanism is linked together with the export end of second -level processing mechanism, the import end of fourth -level processing mechanism is linked together with the first export end of third -level processing mechanism, the first import end of developing waste liquid processing mechanism is linked together with the discharge port of plate making machine developing waste liquid. The utility model discloses through to the developing waste liquid of plate making machine and ordinary sewage separation carries out the treatment, can avoid high concentration pollutant to inhibit the activity of microorganism in ordinary sewage, can improve the processing efficiency and processing effect of plate making machine wastewater.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology for plate-forming machines, and in particular to a wastewater treatment system for plate-forming machines. Background Technology

[0002] Plate processing machines are core equipment in the printing plate-making process. They are mainly used to transform exposed printing plates (such as PS or CTP plates) into printable images through processes such as developing, washing, and drying. Their performance directly affects printing quality, production efficiency, and cost control. Direct discharge of wastewater from plate processing machines can cause water pollution (eutrophication (the decomposition of organic matter consumes dissolved oxygen, leading to the death of aquatic organisms such as fish), heavy metal accumulation (silver ions are transferred through the food chain, ultimately harming human health), soil pollution (alkaline wastewater seeps into the soil, damaging soil structure and inhibiting plant growth), and ecosystem disruption (microbial community imbalance affects the self-purification capacity of water bodies, leading to long-term ecosystem degradation). Therefore, we urgently need a wastewater treatment system for plate processing machines.

[0003] During the operation of a plate processor, developing wastewater and general wastewater are generated. Currently, developing wastewater and general wastewater are treated together in the wastewater treatment system. However, because developing wastewater contains high concentrations of organic matter (e.g., developers, reducing agents) and heavy metals (e.g., silver ions), while general wastewater is mainly composed of suspended solids and low concentrations of organic matter, mixing developing wastewater and general wastewater together will affect the treatment efficiency and effect of plate processor wastewater. At the same time, it will also increase treatment costs and is not conducive to resource recycling. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a wastewater treatment system for a plate developing machine. By improving the structure of the wastewater treatment system, the developing wastewater from the plate developing machine is treated separately from ordinary sewage, which can improve the treatment efficiency and effect of the wastewater from the plate developing machine. At the same time, it can also reduce the wastewater treatment cost of the plate developing machine and facilitate the recycling of resources.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A plate developing machine wastewater treatment system includes: a primary treatment unit, a secondary treatment unit, a tertiary treatment unit, a quaternary treatment unit, and a developing wastewater treatment unit. The inlet of the primary treatment unit is connected to the outlet of the plate developing machine's ordinary wastewater. The primary treatment unit is used to remove large suspended solids from the ordinary wastewater and to neutralize, flocculate, decolorize, and deodorize it. The inlet of the secondary treatment unit is connected to the outlet of the primary treatment unit. The secondary treatment unit is used to remove flocculated suspended solids and particulate matter from the ordinary wastewater. The inlet of the tertiary treatment unit is connected to the outlet of the secondary treatment unit. The tertiary treatment unit is used for the separation and treatment of ordinary wastewater. The inlet end of the quaternary treatment unit is connected to the first outlet end of the tertiary treatment unit. The quaternary treatment unit is used for water sterilization and filtration, and the filtered water is returned to the water supply port of the plate processor. The first inlet end of the developing waste liquid treatment unit is connected to the outlet of the developing waste liquid of the plate processor. The second inlet end of the developing waste liquid treatment unit is connected to the second outlet end of the tertiary treatment unit. The outlet end of the developing waste liquid treatment unit is connected to the inlet end of the quaternary treatment unit. The developing waste liquid treatment unit is used for the solidification treatment of developing waste liquid and concentrated water.

[0007] Therefore, ordinary wastewater enters the primary treatment unit for treatment, while developing wastewater enters the developing wastewater treatment unit for treatment. Compared to the existing treatment method of mixing developing wastewater and ordinary wastewater together, this method is simple in structure and easy to operate. It can treat developing wastewater from the plate developing machine separately from ordinary wastewater, avoiding the inhibition of microbial activity in ordinary wastewater by high-concentration pollutants. This improves the treatment efficiency and effect of plate developing machine wastewater, while reducing the consumption of chemicals and avoiding excessive use of chemicals due to dilution from mixed wastewater, thus reducing the cost of plate developing machine wastewater treatment. In addition, silver can be recovered from the developing wastewater through electrolysis or chemical precipitation, which is beneficial for resource recycling.

[0008] As a further improvement to the above technical solution: the primary treatment mechanism includes a filter return tank and a biological treatment tank. The inlet end of the filter return tank is connected to the outlet of the ordinary wastewater from the plate-making machine, the outlet end of the filter return tank is connected to the inlet end of the biological treatment tank, and the outlet end of the biological treatment tank is connected to the inlet end of the secondary treatment mechanism. The biological filter cotton in the filter return tank is used to remove large particulate suspended solids from the ordinary wastewater.

[0009] As a further improvement to the above technical solution: the biological treatment tank is connected to a chemical addition pipe, which is used to add chemicals to the biological treatment tank to neutralize, flocculate, decolorize, and deodorize the ordinary wastewater in the biological treatment tank. Thus, through the neutralization, flocculation, decolorization, and deodorization of ordinary wastewater, combined with the conventional coarse filtration of the secondary treatment unit and the fine filtration of the tertiary treatment unit, the clear and clean rinsing water is ensured.

[0010] As a further improvement to the above technical solution: the four-stage treatment mechanism includes a water storage tank, an ultraviolet sterilization chamber, and a filtration chamber. The water storage tank, the ultraviolet sterilization chamber, and the filtration chamber are sequentially connected. The first outlet of the three-stage treatment mechanism and the outlet of the developing waste liquid treatment mechanism are both connected to the inlet of the water storage tank. The outlet of the filtration chamber is connected to the water supply port of the plate processor. The ultraviolet sterilization chamber is used for water sterilization, and the filtration chamber is used for water filtration. Thus, the ultraviolet sterilization chamber can sterilize the water to remove microorganisms, ensuring that the water does not affect subsequent plate processing operations.

[0011] As a further improvement to the above technical solution: the developing waste liquid treatment mechanism includes: a waste liquid transfer tank and a curing processor. The waste liquid transfer tank is connected to the curing processor. The outlet of the developing waste liquid from the plate processor is connected to the waste liquid transfer tank. The second outlet end of the three-stage treatment mechanism is connected to the curing processor. The outlet end of the curing processor is connected to the water storage tank. The curing processor is used for the curing treatment of developing waste liquid and concentrated water.

[0012] As a further improvement to the above technical solution: the curing processor includes a scraped-film evaporator and a solid collection tank. The waste liquid transfer tank is connected to the inlet end of the scraped-film evaporator, the second outlet end of the three-stage treatment mechanism is connected to the scraped-film evaporator, the solid collection tank is connected to the solid outlet end of the scraped-film evaporator, and the water storage tank is connected to the liquid outlet end of the scraped-film evaporator. The scraped-film evaporator is used for the curing treatment of developing waste liquid and concentrated water, and the solid collection tank is used to collect the solids after the developing waste liquid and concentrated water have been cured. Thus, the developing waste liquid and concentrated water are concentrated and cured by electric heating. The concentrated solid waste is discharged into the solid collection tank by a scraper for subsequent solid waste cleaning. Furthermore, no chemical agents need to be added during the curing treatment of the developing waste liquid and concentrated water.

[0013] As a further improvement to the above technical solution: the inlet of the filter return water tank is connected to the outlet of the ordinary sewage from the plate making machine through a first sewage pipe, and a first pump is installed on the first sewage pipe.

[0014] As a further improvement to the above technical solution: the waste liquid transfer tank is connected to the discharge port of the developing waste liquid of the plate processor through a second drain pipe, and the second drain pipe is equipped with a second pump.

[0015] As a further improvement to the above technical solution: the liquid outlet of the scraped film evaporator is connected to the inlet of the water storage tank through a connecting pipe, and a third pump is installed on the connecting pipe.

[0016] As a further improvement to the above technical solution: the filter chamber is connected to the water supply port of the plate making machine through a return pipe, and a fourth pump is installed in the return pipe.

[0017] The beneficial effects of this utility model are as follows:

[0018] Ordinary wastewater is treated in the primary treatment unit, while developing wastewater is treated in the developing wastewater treatment unit. Compared to the existing method of treating developing wastewater and ordinary wastewater together, this method is simpler in structure and easier to operate. It can treat developing wastewater from the plate processor separately from ordinary wastewater, avoiding the inhibition of microbial activity in ordinary wastewater by high-concentration pollutants. This improves the treatment efficiency and effect of plate processor wastewater, while reducing the consumption of chemicals and avoiding excessive use of chemicals due to dilution from mixed wastewater, thus reducing the cost of plate processor wastewater treatment. In addition, silver can be recovered from the developing wastewater through electrolysis or chemical precipitation, which is beneficial for resource recycling.

[0019] This utility model also has the following advantages:

[0020] 1. This utility model neutralizes, flocculates, decolorizes, and deodorizes ordinary sewage, and combines this with conventional coarse filtration in a secondary treatment unit and fine filtration in a tertiary treatment unit to ensure the clarity and cleanliness of the printing plate washing water.

[0021] 2. This utility model can sterilize water through an ultraviolet sterilization chamber to remove microorganisms in the water and ensure that the water will not affect subsequent plate-making operations.

[0022] 3. The present invention uses electric heating to concentrate and solidify the developing waste liquid and concentrated water. After concentration, the solid waste is discharged into the solid collection tank by a scraper to facilitate subsequent cleaning of solid waste. In addition, no chemical agents need to be added during the solidification process of developing waste liquid and concentrated water. Attached Figure Description

[0023] Figure 1 This is a system block diagram of the wastewater treatment system for plate-making machines according to this utility model;

[0024] Figure 2 This is a system block diagram of the primary processing mechanism of this utility model;

[0025] Figure 3 This is a system block diagram of the four-stage processing mechanism of this utility model;

[0026] Figure 4 This is a system block diagram of the developer waste liquid treatment mechanism of this utility model.

[0027] Among them: 1. Primary processing unit;

[0028] 101. Filter return water tank; 102. Biological treatment tank; 103. Chemical dosing pipe;

[0029] 2. Plate-forming machine;

[0030] 3. Secondary processing unit;

[0031] 4. Three-level processing unit;

[0032] 5. Level 4 processing facility;

[0033] 501. Water storage tank; 502. Ultraviolet sterilization chamber; 503. Filtration chamber;

[0034] 6. Developing waste liquid treatment facility;

[0035] 601. Waste liquid transfer tank; 602. Solidification processor; 603. Scraped film evaporator; 604. Solid collection tank;

[0036] 7. First sewage pipe;

[0037] 701, First Pump;

[0038] 8. Second sewage pipe;

[0039] 801, Second Pump;

[0040] 9. Connecting pipe;

[0041] 901, Third Pump;

[0042] 10. Return pipe;

[0043] 11. Fourth pump. Detailed Implementation

[0044] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0045] like Figures 1 to 4The diagram shows the preferred embodiment of this utility model. The wastewater treatment system for the plate developing machine in this embodiment includes: a primary treatment unit 1, a secondary treatment unit 3, a tertiary treatment unit 4, a quaternary treatment unit 5, and a developing wastewater treatment unit 6. The inlet of the primary treatment unit 1 is connected to the outlet of the ordinary wastewater from the plate developing machine 2. The primary treatment unit 1 is used to remove large suspended solids from the ordinary wastewater and to neutralize, flocculate, decolorize, and deodorize it. The inlet of the secondary treatment unit 3 is connected to the outlet of the primary treatment unit 1. The secondary treatment unit 3 is used to remove flocculated suspended solids and particulate matter from the ordinary wastewater. The inlet of the tertiary treatment unit 4 is connected to the outlet of the primary treatment unit 1. The outlet end of the treatment unit 3 is connected to the tertiary treatment unit 4, which is used for the separation and treatment of ordinary sewage. The inlet end of the quaternary treatment unit 5 is connected to the first outlet end of the tertiary treatment unit 4. The quaternary treatment unit 5 is used for water sterilization and filtration, and the filtered water is returned to the water supply port of the plate processor 2. The first inlet end of the developing waste liquid treatment unit 6 is connected to the outlet of the developing waste liquid of the plate processor 2. The second inlet end of the developing waste liquid treatment unit 6 is connected to the second outlet end of the tertiary treatment unit 4. The outlet end of the developing waste liquid treatment unit 6 is connected to the inlet end of the quaternary treatment unit 5. The developing waste liquid treatment unit 6 is used for the solidification treatment of developing waste liquid and concentrated water. Therefore, ordinary wastewater enters the primary treatment unit 1 for treatment, while developing wastewater enters the developing wastewater treatment unit 6 for treatment. Compared with the existing treatment method of mixing developing wastewater and ordinary wastewater together, this method has a simple structure and is easy to operate. It can treat developing wastewater from the plate processor 2 separately from ordinary wastewater, avoiding the inhibition of microbial activity in ordinary wastewater by high-concentration pollutants. This improves the treatment efficiency and effect of the plate processor 2 wastewater, while reducing the consumption of chemicals and avoiding excessive use of chemicals due to dilution from mixed wastewater, thus reducing the treatment cost of plate processor 2 wastewater. In addition, silver can be recovered from the developing wastewater through electrolysis or chemical precipitation, which is beneficial for resource recycling.

[0046] In other words, because the developing wastewater contains high concentrations of organic matter and heavy metals, it needs to be treated by chemical precipitation + ion exchange or advanced oxidation (e.g., Fenton's reagent). Ordinary sewage, on the other hand, is mainly composed of suspended solids and low concentrations of organic matter, and is suitable for biological treatment (e.g., activated sludge process) or membrane filtration. Thus, separate treatment can avoid the high concentration of pollutants inhibiting the activity of microorganisms in ordinary sewage. In addition, directly treating developing wastewater can easily lead to overload or failure of the treatment equipment. At the same time, if the strong alkaline (pH>11) or acidic substances in the developing wastewater are mixed into ordinary sewage, they will disrupt the pH balance of the ordinary sewage biological treatment system, leading to the death of microorganisms. Therefore, separate treatment can ensure the stability of each treatment unit, extend the service life of the entire equipment, and thus improve the treatment efficiency and effect of the wastewater from the plate developing machine 2.

[0047] In other words, when the developing wastewater is treated separately, the reagents can be precisely added through pH adjustment and heavy metal precipitation, avoiding excessive use of reagents due to dilution from mixed wastewater. In addition, the developing wastewater and the water after ordinary wastewater treatment can be recycled back into the plate processor 2 for reuse, thereby reducing the wastewater treatment cost of the plate processor 2.

[0048] In this embodiment, the primary treatment unit 1 includes a filter return water tank 101 and a biological treatment tank 102. The inlet of the filter return water tank 101 is connected to the outlet of the ordinary wastewater from the plate-developing machine 2, and the outlet of the filter return water tank 101 is connected to the inlet of the biological treatment tank 102. The outlet of the biological treatment tank 102 is connected to the inlet of the secondary treatment unit 3. The biochemical filter cotton in the filter return water tank 101 is used to remove large suspended particles from the ordinary wastewater. The biological treatment tank 102 is connected to a chemical addition pipe 103, which is used to add chemicals to the biological treatment tank 102 to neutralize, flocculate, decolorize, and deodorize the ordinary wastewater in the biological treatment tank 102. Thus, through the neutralization, flocculation, decolorization, and deodorization of the ordinary wastewater, combined with the conventional coarse filtration of the secondary treatment unit 3 and the fine filtration of the tertiary treatment unit 4, the clear and clean plate-developing water is ensured.

[0049] In this embodiment, the four-stage processing mechanism 5 includes a water storage tank 501, an ultraviolet sterilization chamber 502, and a filtration chamber 503. The water storage tank 501, ultraviolet sterilization chamber 502, and filtration chamber 503 are sequentially connected. The first outlet of the three-stage processing mechanism 4 and the outlet of the developing waste liquid treatment mechanism 6 are both connected to the inlet of the water storage tank 501. The outlet of the filtration chamber 503 is connected to the water supply port of the plate processor 2. The ultraviolet sterilization chamber 502 is used for water sterilization, and the filtration chamber 503 is used for water filtration. Thus, the ultraviolet sterilization chamber 502 can sterilize the water to remove microorganisms, ensuring that the water does not affect subsequent plate processing operations.

[0050] In this embodiment, the developing waste liquid treatment mechanism 6 includes: a waste liquid transfer tank 601 and a curing processor 602. The waste liquid transfer tank 601 is connected to the curing processor 602. The outlet of the developing waste liquid from the plate processor 2 is connected to the waste liquid transfer tank 601. The second outlet of the three-stage treatment mechanism 4 is connected to the curing processor 602. The outlet of the curing processor 602 is connected to the water storage tank 501. The curing processor 602 is used for the curing treatment of developing waste liquid and concentrated water. The curing processor 602 includes: a scraping steamer... The evaporator 603 and solid collection tank 604 are connected. The waste liquid transfer tank 601 is connected to the inlet end of the scraped film evaporator 603. The second outlet end of the three-stage treatment mechanism 4 is connected to the scraped film evaporator 603. The solid collection tank 604 is connected to the solid outlet end of the scraped film evaporator 603. The water storage tank 501 is connected to the liquid outlet end of the scraped film evaporator 603. The scraped film evaporator 603 is used for the solidification treatment of developing waste liquid and concentrated water. The solid collection tank 604 is used to collect the solids after the developing waste liquid and concentrated water have been solidified. Thus, the developing waste liquid and concentrated water are concentrated and solidified by electric heating. The concentrated solid waste is discharged into the solid collection tank 604 by a scraper to facilitate subsequent solid waste cleaning. In addition, no chemical agents need to be added during the solidification treatment of developing waste liquid and concentrated water.

[0051] In this embodiment, the inlet of the filter return water tank 101 is connected to the outlet of the ordinary sewage of the plate making machine 2 through the first sewage pipe 7, and the first sewage pipe 7 is equipped with a first pump 701.

[0052] In this embodiment, the waste liquid transfer tank 601 is connected to the outlet of the developing waste liquid of the plate processor 2 through a second drain pipe 8, and the second drain pipe 8 is equipped with a second pump 801.

[0053] In this embodiment, the liquid outlet of the scraped film evaporator 603 is connected to the inlet of the water storage tank 501 via a connecting pipe 9, and a third pump 901 is installed on the connecting pipe 9.

[0054] In this embodiment, the filter chamber 503 is connected to the water supply port of the plate processor 2 via a return pipe 10, and the return pipe 10 is equipped with a fourth pump 11.

[0055] The wastewater treatment process of the plate processor 2 of this utility model is as follows: First, the first drain pipe 7 is connected to the ordinary sewage outlet of the plate processor 2, the second drain pipe 8 is connected to the developing waste liquid outlet of the plate processor 2, and the return pipe 10 is connected to the water supply port of the plate processor 2.

[0056] Finally, start the first pump 701, the second pump 801, the third pump 901, and the fourth pump 11;

[0057] Ordinary wastewater sequentially passes through a filter return tank 101, a biological treatment tank 102, a secondary treatment unit 3, a tertiary treatment unit 4, a storage tank 501, an ultraviolet sterilization chamber 502, and a filtration chamber 503. Large suspended solids in the ordinary wastewater are removed by the biological filter cotton inside the filter return tank 101. The ordinary wastewater is neutralized, flocculated, decolorized, and deodorized in the biological treatment tank 102. The secondary treatment unit 3 removes flocculated suspended solids and particulate matter (i.e., conventional coarse filtration) from the ordinary wastewater. The tertiary treatment unit 4 performs separation treatment (i.e., fine filtration). The separated water flows into the storage tank 501, and the separated concentrated water flows into the scraped membrane evaporator 603. The ultraviolet sterilization chamber 502 removes microorganisms from the water, and the filtration chamber 503 filters the water. Finally, the treated water is returned to the plate processor 2.

[0058] The developing wastewater and concentrated water are concentrated and solidified in the scraper evaporator 603. The solids after concentration and solidification are scraped off by a scraper and discharged into the solids collection tank 604. The water after concentration and solidification flows into the water storage tank 501 through the connecting pipe 9. Microorganisms in the water are removed by the ultraviolet sterilization chamber 502. The water is filtered by the filtration chamber 503. Finally, the treated water is returned to the plate processor 2.

[0059] In summary, this invention treats ordinary wastewater in the primary treatment unit 1 and developing wastewater in the developing wastewater treatment unit 6. Compared to existing methods that mix developing wastewater and ordinary wastewater, this method is simpler in structure and easier to operate. It separates the developing wastewater from the plate processor 2 from the ordinary wastewater, preventing high-concentration pollutants from inhibiting the activity of microorganisms in the ordinary wastewater. This improves the treatment efficiency and effect of the plate processor 2 wastewater, while reducing the consumption of chemicals and avoiding excessive use of chemicals due to dilution from mixed wastewater, thus lowering the treatment cost of the plate processor 2 wastewater. Furthermore, silver can be recovered from the developing wastewater through electrolysis or chemical precipitation, which is beneficial for resource recycling.

[0060] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A wastewater treatment system for a plate-making machine, characterized in that, include: The primary treatment unit (1) is connected to the outlet of the ordinary wastewater of the plate making machine (2) at its inlet end. The primary treatment unit (1) is used to remove large particulate suspended solids in the ordinary wastewater and to neutralize, flocculate, decolorize and deodorize the ordinary wastewater. The secondary treatment unit (3) is connected to the outlet of the primary treatment unit (1) at its inlet end. The secondary treatment unit (3) is used to remove flocculated suspended solids and particulate matter from ordinary sewage. The tertiary treatment unit (4) is connected to the outlet of the secondary treatment unit (3) at its inlet end. The tertiary treatment unit (4) is used for the separation and treatment of ordinary sewage. The fourth-level treatment mechanism (5) is connected to the first outlet of the third-level treatment mechanism (4). The fourth-level treatment mechanism (5) is used for water sterilization and filtration, and the filtered water is returned to the water supply port of the plate making machine (2). The developing waste liquid treatment mechanism (6) is connected to the outlet of the developing waste liquid of the plate processor (2) at its first inlet end, and to the second outlet end of the third-stage treatment mechanism (4) at its second inlet end. The outlet end of the developing waste liquid treatment mechanism (6) is connected to the inlet end of the fourth-stage treatment mechanism (5). The developing waste liquid treatment mechanism (6) is used for the solidification treatment of developing waste liquid and concentrated water.

2. The plate-making machine wastewater treatment system as described in claim 1, characterized in that: The primary processing unit (1) includes: The filter return water tank (101) and the biological treatment tank (102) are connected. The inlet end of the filter return water tank (101) is connected to the outlet of the ordinary sewage of the plate making machine (2). The outlet end of the filter return water tank (101) is connected to the inlet end of the biological treatment tank (102). The outlet end of the biological treatment tank (102) is connected to the inlet end of the secondary treatment unit (3). The biochemical filter cotton in the filter return water tank (101) is used to remove large particulate suspended solids in the ordinary sewage.

3. The plate-making machine wastewater treatment system as described in claim 2, characterized in that: The biochemical tank (102) is connected to a reagent addition pipe (103), which is used to add reagents to the biochemical tank (102) to neutralize, flocculate, decolorize and deodorize the ordinary sewage in the biochemical tank (102).

4. The plate-making machine wastewater treatment system as described in claim 1, characterized in that: The fourth-level processing unit (5) includes: The water storage tank (501), the ultraviolet sterilization chamber (502), and the filter chamber (503) are connected in sequence. The first outlet end of the three-stage treatment mechanism (4) and the outlet end of the developing waste liquid treatment mechanism (6) are both connected to the inlet end of the water storage tank (501). The outlet end of the filter chamber (503) is connected to the water supply port of the plate processor (2). The ultraviolet sterilization chamber (502) is used for water sterilization treatment, and the filter chamber (503) is used for water filtration treatment.

5. The plate-forming machine wastewater treatment system as described in claim 4, characterized in that: The developer waste liquid treatment unit (6) includes: The waste liquid transfer tank (601) and the curing processor (602) are connected. The outlet of the developing waste liquid of the plate processor (2) is connected to the waste liquid transfer tank (601). The second outlet of the three-stage treatment mechanism (4) is connected to the curing processor (602). The outlet of the curing processor (602) is connected to the water storage tank (501). The curing processor (602) is used for the curing treatment of developing waste liquid and concentrated water.

6. The plate-making machine wastewater treatment system as described in claim 5, characterized in that: The curing processor (602) includes: The scraped film evaporator (603) and solid collection tank (604) are provided. The waste liquid transfer tank (601) is connected to the inlet end of the scraped film evaporator (603). The second outlet end of the three-stage treatment mechanism (4) is connected to the scraped film evaporator (603). The solid collection tank (604) is connected to the solid outlet end of the scraped film evaporator (603). The water storage tank (501) is connected to the liquid outlet end of the scraped film evaporator (603). The scraped film evaporator (603) is used for the solidification treatment of developing waste liquid and concentrated water. The solid collection tank (604) is used to collect the solids after the solidification treatment of developing waste liquid and concentrated water.

7. The plate-making machine wastewater treatment system as described in claim 2, characterized in that: The inlet of the filter return water tank (101) is connected to the outlet of the ordinary sewage of the plate making machine (2) through a first sewage pipe (7), and the first sewage pipe (7) is equipped with a first pump (701).

8. The plate-making machine wastewater treatment system as described in claim 5, characterized in that: The waste liquid transfer tank (601) is connected to the outlet of the developing waste liquid of the plate processor (2) through a second drain pipe (8), and the second drain pipe (8) is equipped with a second pump (801).

9. The plate-making machine wastewater treatment system as described in claim 6, characterized in that: The liquid outlet of the scraped film evaporator (603) is connected to the inlet of the water storage tank (501) via a connecting pipe (9), and a third pump (901) is installed on the connecting pipe (9).

10. The plate-making machine wastewater treatment system as described in claim 4, characterized in that: The filter chamber (503) is connected to the water supply port of the plate making machine (2) through a return pipe (10), and the return pipe (10) is equipped with a fourth pump (11).

Images