Printing plate roller cleaning waste liquid recovery system

Abstract

The printing plate roller cleaning waste liquid recovery system comprises a layering section, a feeding pipe, a primary filtering structure, a demulsification structure, a driving motor, a grease suction pipe, a conveying pipe, a distillation bin, a liquefaction pipe and a collection kettle, the feeding pipe is fixedly installed on the outer side of the top of the layering section, and the primary filtering structure is fixedly installed in the feeding pipe; the demulsification structure is rotationally mounted in the layering section and is connected with an output shaft of a driving motor mounted at the top of the layering section; the grease suction pipe is positioned at the upper half part of the layering section; and the liquefaction pipe is connected between the distillation bin and the collection kettle. By arranging the layering interval, the demulsification structure, the grease pumping pipe and the liquefying pipe, the problems that an existing printing plate roller cleaning waste liquid recovery system is low in oil-water separation efficiency, grease recovery after separation is not pure, the technological process is discrete, and the automation degree is low are solved.

Description

Technical Field

[0001] This invention relates to the field of printing plate roller cleaning devices, specifically a printing plate roller cleaning waste liquid recovery system. Background Technology

[0002] In the printing industry, especially in production processes using flexographic or gravure printing rollers, regular roller cleaning is an essential maintenance step. This process generates a large amount of complex mixed wastewater containing ink, resin, mineral oil, animal and vegetable oils, and volatile organic cleaning solvents (such as ethanol, ethyl acetate, and hydrocarbons). This type of wastewater has a complex composition, poor chemical stability, and extremely high COD (chemical oxygen demand). If discharged directly without effective treatment, it will cause serious pollution to the aquatic environment and also means a direct waste of valuable oils and solvents. However, existing printing roller cleaning wastewater recovery systems still suffer from low oil-water separation efficiency, impure oil recovery after separation, fragmented process flow, and low degree of automation.

[0003] Therefore, it is essential to invent a waste liquid recycling system for printing roller cleaning. Summary of the Invention

[0004] The purpose of this invention is to provide a waste liquid recovery system for printing roller cleaning, in order to solve the problems that existing waste liquid recovery systems still have, such as low oil-water separation efficiency, impure oil recovery after separation, discrete process flow, and low degree of automation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: comprising a stratification zone, a feed pipe, a primary filtration structure, a demulsification structure, a drive motor, an oil extraction pipe, a conveying pipe, a distillation chamber, a liquefaction pipe, and a collection vessel. The feed pipe is fixedly installed on the outer side of the top of the stratification zone, and the primary filtration structure is fixedly installed inside the feed pipe. The demulsification structure is rotatably installed inside the stratification zone and connected to the output shaft of the drive motor installed at the top of the stratification zone. The oil extraction pipe is located in the upper half of the stratification zone. The liquefaction pipe connects the distillation chamber and the collection vessel. One end of the conveying pipe is fixedly installed at the bottom of the layered section, and the other end of the conveying pipe is fixedly installed at the top of the distillation chamber. A conveying pump body is installed inside the conveying pipe.

[0006] The layered section includes an oil section, a connecting chamber, a water-ink section, and an observation neck. The connecting chamber is installed below the oil section and above the water-ink section. An observation neck is fixedly installed between the two sets of connecting chambers.

[0007] The demulsifying structure includes a rotating shaft, a sliding sleeve, a folding drive push rod, a folding drive arm, and a demulsifying stirring blade. The rotating shaft is rotatably installed inside the stratification zone and connected to the output shaft of a drive motor installed at the top of the stratification zone. The sliding sleeve is slidably installed on the surface of the rotating shaft, and the folding drive push rod is fixedly installed between the rotating shaft and the sliding sleeve by a bracket. The folding drive arm is hinged between the rotating shaft and the sliding sleeve, and the demulsifying stirring blade is hinged to the outside of the folding drive arm.

[0008] The grease extraction tube includes a sliding mounting port, an oil extraction tube, an external delivery tube, a connecting frame, and an adjusting push rod. The sliding mounting port is fixedly installed at the top of the layered section, and the oil extraction tube is slidably installed inside the sliding mounting port. The external delivery tube is fixedly installed at the top of the oil extraction tube, and the connecting frame is fixedly installed on the outer side of the portion of the oil extraction tube located outside the layered section. The adjusting push rod is fixedly installed between the outer wall of the layered section and the connecting frame via a bracket.

[0009] The liquefaction pipe includes a distillation delivery pipe, a liquefaction cooling sleeve, a cooling water inlet, and a cooling water outlet. The distillation delivery pipe is connected between the distillation chamber and the collection vessel. The liquefaction cooling sleeve is fixedly installed on the outside of the distillation delivery pipe. The cooling water inlet and the cooling water outlet are respectively fixedly installed at both ends of the liquefaction cooling sleeve.

[0010] The entire layered section, except for the observation neck, is supported by stainless steel, and is equipped with a sealed top plate and a sealed bottom plate at its top and bottom. The entire layered section is funnel-shaped, and the length of the grease section is shorter than that of the water-ink section, and the volume of the grease section is smaller than that of the water-ink section. The observation neck is a set of transparent tempered glass tubes, and the oil-water separation surface can be clearly seen from the observation neck. The oil-water separation surface inside the observation neck can be raised by injecting water into the layered interval, and lowered by draining the liquid in the water-ink interval through the delivery pipe.

[0011] The demulsifying structure is divided into several units, which are connected end to end to form a stirring structure driven by a drive motor. The sliding sleeve is made of stainless steel and can slide back and forth on the surface of the rotating shaft by the drive of the folding drive rod. The back and forth sliding of the sliding sleeve can drive the folding drive arm to open and close, so that the demulsifying stirring blades connected to it can extend outward or retract inward. The folding drive push rod uses several sets of small electric push rods, with a waterproof outer shell. The folding drive push rod is powered by a battery; the power supply battery of the drive push rod is located inside the space inside the rotating shaft.

[0012] The demulsifying agitator blades are made of several long strip steel metal plates, and the demulsifying agitator blades can be replaced with metal plates of different widths or with toothed structures according to the concentration of the waste liquid.

[0013] The sliding mounting port inside the grease extraction tube is a ring-shaped plastic opening, and several metal balls are arranged in a ring on the inner wall of the sliding mounting port. This sliding mounting port allows the extraction tube to slide inside. The extraction tube is a stainless steel metal tube, and the delivery tube is a flexible rubber tube. A negative pressure pump is installed at one end of the delivery tube. The extraction tube can generate suction through the pump at one end of the delivery tube, and the opening at the top of the extraction tube narrows inward. It can also move vertically by adjusting the push rod. The extraction tube can always stay at the oil-water separation surface inside the observation neck through its reciprocating movement.

[0014] The liquefaction pipe is a single pipe connecting the distillation chamber and the collection vessel. The distillation delivery pipe is made of copper, with a spiral copper section in the middle, located inside the liquefaction cooling sleeve. The liquefaction cooling sleeve is made of a set of steel pipes with a diameter three times larger than the distillation delivery pipe, and both ends of the liquefaction cooling sleeve are sealed to the outer wall of the distillation delivery pipe by metal plates. An annular space is formed between the distillation delivery pipe and the liquefaction cooling sleeve, and the cooling water inlet and outlet can continuously circulate cooling water within this annular space. A circulation pump is installed at one end of the cooling water inlet, which draws external cooling water into the interior of the liquefied cooling sleeve and finally outputs it out through the cooling water outlet. The flow direction of the cooling water inside the liquefaction cooling sleeve is opposite to the flow direction of the distilled gas and liquid inside the distillation delivery pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The layered design of this invention clearly divides the internal space into an upper oil-water zone and a lower water-water zone, connected by a connecting chamber with a transparent observation neck in the middle. This design not only provides ample and distinct settling space for oil-water separation, improving separation efficiency, but also allows operators to directly and clearly monitor the real-time position of the oil-water interface through the observation neck. The smaller diameter observation neck design makes the interface clearer and the position change more sensitive. This not only facilitates observation of the liquid level but also makes the extraction action of the oil extraction tube more precise. This provides a direct basis for accurately controlling the suction position of the oil extraction tube and subsequent process parameters, greatly improving the controllability, separation accuracy, and operational convenience of the entire recovery system.

[0016] 2. The demulsification structure of this invention significantly improves demulsification efficiency and adaptability through a deformable stirring design. Specifically, the rotating shaft driven by the drive motor can rotate the entire structure, while the sliding sleeve installed on it can slide back and forth under the drive of the folding drive push rod, thereby pulling the folding drive arm hinged to it to unfold or retract, ultimately allowing the stirring radius of the demulsification stirring blade to be dynamically adjusted. This design can not only unfold the demulsification stirring blade to increase shear force and enhance the demulsification effect when treating high-viscosity or high-concentration waste liquids, but also retract the demulsification stirring blade when treating low-concentration waste liquids or when cleaning and maintenance are required, reducing resistance and interference. At the same time, the demulsification stirring blade itself can be replaced with different specifications, further enhancing the flexibility and processing efficiency of the demulsification structure in response to different working conditions, realizing intelligent, adjustable, and efficient demulsification operation.

[0017] 3. The oil extraction tube of this invention, through the adjustment of the push rod driving the connecting frame, allows for precise control of the vertical position of the extraction tube within the sliding mounting port. This ensures that the suction port is aligned with and follows the oil-water interface displayed in the observation neck in real time. The smaller diameter of the observation neck makes the interface indication extremely clear, further improving positioning accuracy. Simultaneously, the constricted design at the top of the extraction tube, working in conjunction with the negative pressure pump connected to the external delivery tube, achieves stable and controllable extraction. This entire mechanism avoids the accidental extraction of lower-layer water-ink liquid or residual surface oil during the extraction process, greatly optimizing the separation effect and resource recovery rate.

[0018] 4. The liquefaction tube configuration of this invention allows the high-temperature vaporized solvent from the distillation chamber to enter the heat transfer core composed of a spiral distillation delivery tube. A liquefaction cooling sleeve surrounding the core continuously supplies cooling water through a cooling water inlet. The water flows counter-currently to the vapor flow within the annular space formed by the distillation delivery tube and the liquefaction cooling sleeve. This counter-current heat exchange maximizes the temperature difference and heat exchange area, resulting in a rapid and thorough condensation process. The condensed liquid solvent is efficiently collected in a collection vessel via pipelines, while the heated cooling water is discharged from the cooling water outlet. This design not only accelerates the phase change process and increases the processing capacity per unit time but also reduces cooling energy consumption by optimizing heat transfer, achieving efficient and energy-saving continuous liquefaction recovery. Attached Figure Description

[0019] Figure 1 This is a front structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the layered interval structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the demulsification structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the grease extraction tube of the present invention.

[0023] Figure 5 This is a schematic diagram of the liquefaction tube of the present invention.

[0024] In the picture: Layered section 1, feed pipe 2, primary filter structure 3, demulsification structure 4, drive motor 5, grease extraction pipe 6, conveying pipe 7, distillation chamber 8, liquefaction pipe 9, collection vessel 10, grease zone 11, connecting chamber 12, water-ink zone 13, observation neck 14, rotating shaft 41, sliding sleeve 42, folding drive push rod 43, folding drive arm 44, demulsification stirring blade 45, sliding mounting port 61, oil extraction pipe 62, external delivery pipe 63, connecting frame 64, adjusting push rod 65, distillation conveying pipe 91, liquefaction cooling sleeve 92, cooling water inlet 93 and cooling water outlet 94. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] As attached Figures 1-5 As shown: This invention provides a waste liquid recovery system for printing roller cleaning, comprising a layered section 1, a feed pipe 2, a primary filter structure 3, a demulsification structure 4, a drive motor 5, an grease extraction pipe 6, a conveying pipe 7, a distillation chamber 8, a liquefaction pipe 9, and a collection vessel 10. The feed pipe 2 is fixedly installed on the outer side of the top of the layered section 1, and the primary filter structure 3 is fixedly installed inside the feed pipe 2. The demulsification structure 4 is rotatably installed inside the layered section 1 and connected to the output shaft of the drive motor 5 installed at the top of the layered section 1. The grease extraction pipe 6 is located in the upper half of the layered section 1. The liquefaction pipe 9 connects the distillation chamber 8 and the collection vessel 10. One end of the conveying pipe 7 is fixedly installed at the bottom of the layered section 1, and the other end of the conveying pipe 7 is fixedly installed at the top of the distillation chamber 8. A conveying pump body is installed inside the conveying pipe 7.

[0027] The layered section 1 includes an oil section 11, a connecting chamber 12, a water-ink section 13, and an observation neck 14. The connecting chamber 12 is installed below the oil section 11 and above the water-ink section 13. The observation neck 14 is fixedly installed between the two sets of connecting chambers 12.

[0028] The demulsifying structure 4 includes a rotating shaft 41, a sliding sleeve 42, a folding drive push rod 43, a folding drive arm 44, and a demulsifying stirring blade 45. The rotating shaft 41 is rotatably installed inside the layered section 1 and connected to the output shaft of the drive motor 5 installed at the top of the layered section 1. The sliding sleeve 42 is slidably installed on the surface of the rotating shaft 41, and the folding drive push rod 43 is fixedly installed between the rotating shaft 41 and the sliding sleeve 42 by a bracket. The folding drive arm 44 is hinged between the rotating shaft 41 and the sliding sleeve 42. The demulsifying stirring blade 45 is hinged to the outside of the folding drive arm 44.

[0029] The grease extraction tube 6 includes a sliding mounting port 61, an oil extraction tube 62, an external delivery tube 63, a connecting frame 64, and an adjusting push rod 65. The sliding mounting port 61 is fixedly installed at the top of the layered section 1, and the oil extraction tube 62 is slidably installed inside the sliding mounting port 61. The external delivery tube 63 is fixedly installed at the top of the oil extraction tube 62, and the connecting frame 64 is fixedly installed on the outer side of the portion of the oil extraction tube 62 located outside the layered section 1. The adjusting push rod 65 is fixedly installed between the outer wall of the layered section 1 and the connecting frame 64 via a bracket.

[0030] The liquefaction pipe 9 includes a distillation delivery pipe 91, a liquefaction cooling sleeve 92, a cooling water inlet 93, and a cooling water outlet 94. The distillation delivery pipe 91 is connected between the distillation chamber 8 and the collection vessel 10. The liquefaction cooling sleeve 92 is fixedly installed on the outside of the distillation delivery pipe 91. The cooling water inlet 93 and the cooling water outlet 94 are respectively fixedly installed at both ends of the liquefaction cooling sleeve 92.

[0031] Except for the observation neck 14, the entire layered section 1 is supported by stainless steel, and a sealed top plate and a sealed bottom plate are provided at its top and bottom. The entire layered section 1 is funnel-shaped, and the length of the grease section 11 is less than that of the water-ink section 13, and the volume of the grease section 11 is less than that of the water-ink section 13. The observation neck 14 is a set of transparent tempered glass tubes, and the oil-water separation surface can be clearly seen from the observation neck 14. The oil-water separation surface inside the observation neck 14 can be raised by injecting water into the layered interval 1, and lowered by discharging the liquid in the ink-water interval 13 through the delivery pipe 7.

[0032] The demulsifying structure 4 is divided into several units and connected end to end to form a stirring structure driven by a drive motor 5. The sliding sleeve 42 is a stainless steel metal sleeve and can slide back and forth on the surface of the rotating shaft 41 by the drive of the folding drive push rod 43. The back and forth sliding of the sliding sleeve 42 can drive the folding drive arm 44 to open and close, so that the demulsifying stirring blade 45 connected to it can extend outward or retract inward. The folding drive push rod 43 uses several sets of small electric push rods, and its outer side is provided with a waterproof shell. The folding drive push rod 43 is powered by a battery. The power supply battery of the drive push rod 43 is located inside the space inside the rotating shaft 41.

[0033] The demulsifying stirring blade 45 is made of several long strip steel metal plates, and the demulsifying stirring blade 45 can be replaced with metal plates of different widths or with toothed structures according to the concentration of the waste liquid.

[0034] The sliding mounting port 61 inside the grease extraction tube 6 is an annular plastic opening, and several metal steel balls are arranged in annular array on the inner wall of the sliding mounting port 61. The sliding mounting port 61 allows the oil extraction tube 62 to slide inside it. The oil extraction tube 62 is a stainless steel metal tube, and the external delivery tube 63 is a flexible rubber tube. A negative pressure pump is installed at one end of the external delivery tube 63. The oil extraction tube 62 can generate suction through the pump at one end of the external delivery tube 63, and the opening at the top of the oil extraction tube 62 narrows inward and can move vertically by adjusting the push rod 65. The oil extraction tube 62 can always stay at the oil-water separation surface inside the observation neck 14 through its reciprocating movement.

[0035] The liquefaction pipe 9 is a single pipe connecting the distillation chamber 8 and the collection vessel 10. The distillation delivery pipe 91 is a copper metal pipe, with a spiral copper metal pipe in the middle. This spiral pipe is located inside the liquefaction cooling sleeve 92. The liquefaction cooling sleeve 92 is a set of steel metal pipes with a diameter three times larger than that of the distillation delivery pipe 91. Both ends of the liquefaction cooling sleeve 92 are sealed to the outer wall of the distillation delivery pipe 91 by metal plates. An annular space is formed between the distillation delivery pipe 91 and the liquefaction cooling sleeve 92, and the cooling water inlet 93 and the cooling water outlet 94 can continuously circulate cooling water within this annular space. A circulation pump is installed at one end of the cooling water inlet 93, which draws external cooling water into the interior of the liquefied cooling sleeve 92, and finally outputs it to the outside through the cooling water outlet 94. The flow direction of the cooling water inside the liquefaction cooling sleeve 92 is opposite to the flow direction of the distilled gas and liquid inside the distillation delivery pipe 91.

[0036] The drive motor 5 uses a set of explosion-proof variable frequency speed control motors to handle printing waste liquid that may generate volatile organic gases. The power range is 0.75 kW ~ 2.2 kW, and the speed range is adjustable within 50 ~ 300 rpm. The motor housing protection level should not be lower than IP55 to resist possible water vapor and corrosive gases on site. The folding drive push rod 43 uses a set of small explosion-proof electric push rods with a protection level of IP65 or higher to adapt to working conditions that directly contact liquids. The adjustment push rod 65 uses a set of explosion-proof electric push rods. Although it is installed outside the layered section 1, it is close to the area where leakage may occur, so an explosion-proof push rod with a protection level of IP65 is selected. The conveying pump inside the conveying pipe 7 uses a set of explosion-proof magnetic drive centrifugal pumps. Its internal flow-through components need to be corrosion-resistant, so stainless steel 304 material is used.

[0037] The overall benefits of this printing roller cleaning waste liquid recovery system are reflected in its integrated, intelligent, and high-efficiency design. Through the coordinated operation of its core components, it achieves full-process optimization from waste liquid treatment to resource recovery, as specifically demonstrated below: The separation stage is highly efficient and controllable: the funnel-shaped structure of the stratified zone 1 and the clear division between the oil zone 11 and the water zone 13 provide an ideal physical settling space for oil-water separation, improving initial separation efficiency. The transparent observation neck 14 enables visualization of the separation process; its small diameter design makes the oil-water interface extremely clear, providing a direct and reliable basis for subsequent precise operations. The innovative design of the demulsification structure 4 is its intelligent core. Driven by the drive motor 5, the rotating shaft 41 is driven, and the sliding sleeve 42 is controlled by the folding drive push rod 43, thereby dynamically adjusting the extension angle and stirring radius of the folding drive arm 44 and the demulsification stirring blade 45. This allows the system to actively adapt to waste liquids of different concentrations and viscosities, enhancing shear demulsification force when needed and reducing resistance during maintenance or light loads, significantly improving demulsification effect and operational adaptability.

[0038] 2. Precise and Energy-Saving Recovery Stage: The grease extraction tube 6 achieves precise recovery. By adjusting the push rod 65 to drive the connecting frame 64, the vertical position of the extraction tube 62 in the sliding mounting port 61 can be precisely controlled, allowing its suction port to track and observe the oil-water interface displayed in the neck 14 in real time. Combined with the constriction design at the top of the extraction tube 62 and the negative pressure extraction of the external delivery tube 63, it ensures that only the upper layer of pure grease is extracted, greatly improving the purity and yield of grease recovery. The liquefaction tube 9 embodies the high efficiency and energy saving of the process. The spiral design of the distillation delivery tube 91 increases the heat exchange area, and the external liquefaction cooling sleeve 92 achieves counter-current cooling water circulation through the cooling water inlet 93 and cooling water outlet 94, which is opposite to the steam flow inside the tube, forming a highly efficient counter-current heat exchange. This design greatly enhances the condensation effect, accelerates the solvent recovery speed, and reduces cooling energy consumption by optimizing heat exchange.

[0039] 3. System Integration and Automation Advantages: From the pre-treatment via the primary filtration structure 3 in the feed pipe 2, to the separation in the stratified zone 1, then to the deep treatment in the distillation chamber 8 and the condensation and recovery via the liquefaction pipe 9, and finally to the storage in the collection vessel 10, the system process is complete and tightly integrated. The conveying pipe 7 and its internal pump body ensure the automatic transfer of materials between key stages. The entire system, through the organic combination of mechanical and automatic control, reduces manual intervention, achieves continuous and stable automated operation, and improves processing capacity and operational safety.

[0040] In summary, this equipment offers significant overall benefits. It is not merely a simple stacking of components, but rather an organically coordinated intelligent recycling system. It effectively addresses pain points in the treatment of printing roller cleaning wastewater, such as difficulties in oil-water separation, unstable demulsification effects, incomplete resource recovery, and high energy consumption. While improving processing efficiency and recycling quality, it reduces operating costs, demonstrating significant environmental and economic benefits.

[0041] Example First, connect and start the entire recycling system. Connect the waste liquid collection pipeline to the feed pipe 2, so that the waste liquid first passes through its internal primary filtration structure 3 to filter out large particulate impurities.

[0042] The waste liquid after initial filtration enters the stratification zone 1. The drive motor 5 is started to rotate the rotating shaft 41 of the demulsification structure 4, and the position of the sliding sleeve 42 is adjusted by the folding drive push rod 43, so that the folding drive arm 44 drives the demulsification stirring blade 45 to extend or retract, performing adaptive demulsification stirring. Then it is left to stand, allowing the oil and water to separate naturally in the oil zone 11 and the water-ink zone 13, and the interface is observed through the observation neck 14.

[0043] Based on the clear interface displayed on the observation neck 14, operate the adjustment push rod 65 to drive the connecting frame 64, and finely adjust the height of the oil suction pipe 62 in the sliding mounting port 61 so that its suction port is accurately positioned in the oil layer. Then start the negative pressure pump connected to the external delivery pipe 63 to extract the pure grease.

[0044] Turn on the pump in the delivery pipe 7 to deliver the mixture in the lower layer of the water-ink section 13 to the distillation chamber 8 for heating and distillation, so that the solvent vaporizes and separates.

[0045] The high-temperature solvent vapor generated during distillation enters the distillation delivery pipe 91 of the liquefaction pipe 9. At the same time, cooling water enters the liquefaction cooling sleeve 92 from the cooling water inlet 93, flows countercurrently through the outer wall of the distillation delivery pipe 91 for efficient heat exchange, and the vapor is condensed into liquid, eventually flowing into the collection vessel 10.

[0046] In summary, this system achieves a complete automated process from waste liquid filtration, demulsification and separation, precise oil extraction, to solvent distillation and recovery. Regular maintenance of the primary filter structure 3 and cleaning of residues in the distillation chamber 8 can ensure the continuous and stable operation of the system.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste liquid recycling system for printing roller cleaning, comprising a layered section (1), a feed pipe (2), a primary filter structure (3), a demulsification structure (4), a drive motor (5), an grease extraction pipe (6), a conveying pipe (7), a distillation chamber (8), a liquefaction pipe (9), and a collection vessel (10), wherein the feed pipe (2) is fixedly installed on the outer side of the top of the layered section (1), the primary filter structure (3) is fixedly installed inside the feed pipe (2); the demulsification structure (4) is rotatably installed inside the layered section (1) and connected to the output shaft of the drive motor (5) installed at the top of the layered section (1); the grease extraction pipe (6) is located in the upper half of the layered section (1); the liquefaction pipe (9) is connected between the distillation chamber (8) and the collection vessel (10); One end of the conveying pipe (7) is fixedly installed at the bottom of the layered section (1), and the other end of the conveying pipe (7) is fixedly installed at the top of the distillation chamber (8). A conveying pump body is installed inside the conveying pipe (7).

2. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The layered section (1) includes an oil section (11), a connecting chamber (12), a water-ink section (13), and an observation neck (14). The connecting chamber (12) is installed below the oil section (11) and above the water-ink section (13). An observation neck (14) is fixedly installed between the two sets of connecting chambers (12).

3. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The demulsifying structure (4) includes a rotating shaft (41), a sliding sleeve (42), a folding drive push rod (43), a folding drive arm (44), and a demulsifying stirring blade (45). The rotating shaft (41) is rotatably installed inside the layered section (1) and connected to the output shaft of the drive motor (5) installed at the top of the layered section (1). The sliding sleeve (42) is slidably installed on the surface of the rotating shaft (41), and the folding drive push rod (43) is fixedly installed between the rotating shaft (41) and the sliding sleeve (42) by a bracket. The folding drive arm (44) is hinged between the rotating shaft (41) and the sliding sleeve (42). The demulsifying stirring blade (45) is hinged to the outside of the folding drive arm (44).

4. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The grease extraction tube (6) includes a sliding mounting port (61), an oil extraction tube (62), an external delivery tube (63), a connecting frame (64), and an adjusting push rod (65). The sliding mounting port (61) is fixedly installed at the top of the layered section (1), and the oil extraction tube (62) is slidably installed inside the sliding mounting port (61). The external delivery tube (63) is fixedly installed at the top of the oil extraction tube (62), and the connecting frame (64) is fixedly installed on the outside of the portion of the oil extraction tube (62) located outside the layered section (1). The adjusting push rod (65) is fixedly installed between the outer wall of the layered section (1) and the connecting frame (64) by a bracket.

5. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The liquefaction pipe (9) includes a distillation delivery pipe (91), a liquefaction cooling sleeve (92), a cooling water inlet (93), and a cooling water outlet (94). The distillation delivery pipe (91) is connected between the distillation chamber (8) and the collection vessel (10). The liquefaction cooling sleeve (92) is fixedly installed on the outside of the distillation delivery pipe (91). The cooling water inlet (93) and the cooling water outlet (94) are respectively fixedly installed at both ends of the liquefaction cooling sleeve (92).

6. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The entire layered section (1), except for the observation neck (14), is supported by stainless steel, and a sealed top plate and a sealed bottom plate are provided at its top and bottom; the entire layered section (1) is funnel-shaped, and the length of the grease section (11) is less than that of the water-ink section (13), and the volume of the grease section (11) is less than that of the water-ink section (13); the observation neck (14) is a set of transparent tempered glass tubes, and the oil-water separation surface can be clearly seen from the observation neck (14); The oil-water separation surface inside the observation neck (14) can be raised by injecting water into the layered interval (1) and lowered by draining the liquid in the water-ink interval (13) through the delivery pipe (7).

7. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The demulsifying structure (4) is divided into several units and connected end to end to form a stirring structure driven by a drive motor (5); the sliding sleeve (42) is a stainless steel metal sleeve and can slide back and forth on the surface of the rotating shaft (41) by the drive of the folding drive push rod (43); the back and forth sliding of the sliding sleeve (42) can drive the folding drive arm (44) to open and close, so that the demulsifying stirring blade (45) connected to it can extend outward or retract inward; The folding drive push rod (43) uses several sets of small electric push rods, and a waterproof shell is provided on its outer side. The folding drive push rod (43) is powered by a storage battery. The power supply battery of the drive push rod (43) is located inside the space inside the rotating shaft (41). The demulsifying stirring blade (45) is made of several long strip steel metal plates, and the demulsifying stirring blade (45) can be replaced with metal plates of different widths or with toothed structures according to the concentration of the waste liquid.

8. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The sliding mounting port (61) inside the grease extraction tube (6) is an annular plastic port, and the inner wall of the sliding mounting port (61) is arranged with several metal steel balls in an annular array. The sliding mounting port (61) allows the oil extraction tube (62) to slide inside it. The oil extraction tube (62) is a stainless steel metal tube, and the external delivery tube (63) is a flexible rubber tube. A negative pressure pump is installed at one end of the external delivery tube (63). The oil extraction tube (62) can generate suction through the pump at one end of the external delivery tube (63), and the opening at the top of the oil extraction tube (62) narrows inward. It can move vertically by adjusting the push rod (65). The oil extraction tube (62) can always stay at the oil-water separation surface inside the observation neck (14) through its own reciprocating movement.

9. The waste liquid recovery system for printing plate roller cleaning as described in claim 1, characterized in that: The liquefaction pipe (9) is a pipe that connects the distillation chamber (8) and the collection vessel (10); the distillation delivery pipe (91) is a copper metal pipe, and the middle part of the distillation delivery pipe (91) is a spiral copper metal pipe, and the spiral pipe in the middle of the distillation delivery pipe (91) is located inside the liquefaction cooling sleeve (92); the liquefaction cooling sleeve (92) is a set of steel metal pipes with a diameter three times larger than that of the distillation delivery pipe (91), and the two ends of the liquefaction cooling sleeve (92) are sealed to the outer wall of the distillation delivery pipe (91) by metal plates; the distillation delivery pipe (91) and the liquefaction cooling sleeve (92) form an annular space, and the cooling water inlet (93) and the cooling water outlet (94) can continuously circulate cooling water inside this annular space; A circulation pump is provided at one end of the cooling water inlet (93) to draw external cooling water into the interior of the liquefied cooling sleeve (92) and finally output it to the outside through the cooling water outlet (94); The flow direction of the cooling water inside the liquefaction cooling sleeve (92) is opposite to the flow direction of the distilled gas and liquid inside the distillation delivery pipe (91).

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