A device for recycling ink washing waste liquid in printing.

Abstract

This utility model discloses a waste ink washing liquid recycling device for printing, including a support frame on which primary, secondary, and tertiary filter tubes are fixedly installed. The primary filter tube uses a pre-screening filter to filter large particulate impurities, the secondary filter tube uses activated carbon to adsorb pigments and organic pollutants, and the tertiary filter tube uses a microporous membrane to finely filter small particles. The secondary filter tube has a three-way structure for easy replacement of activated carbon, and the adsorption status can be observed through an observation cover. Components such as connecting rods, sealing plugs, and support plates work together to achieve a good seal, while springs, limiting plates, and limiting rods facilitate the installation and fixation of components. This device solves the problems of incomplete filtration, inconvenient activated carbon maintenance, poor sealing, and cumbersome installation and fixation in traditional recycling devices, improving the efficiency and quality of waste ink washing liquid recycling and achieving environmental protection and resource recycling.

Description

Technical Field

[0001] This application relates to the field of ink waste liquid recycling technology, specifically to a device for recycling ink washing waste liquid used in printing. Background Technology

[0002] In the printing industry, the treatment and recycling of ink washing wastewater is crucial. On the one hand, ink washing wastewater contains a large amount of ink components, paper fibers, dust particles, and other impurities. Direct discharge not only causes serious environmental pollution but also wastes a significant amount of recyclable resources. On the other hand, with increasingly stringent environmental protection requirements and a growing awareness of resource conservation, the effective recycling of ink washing wastewater has become an inevitable trend. However, existing ink washing wastewater recycling devices for printing have many problems. Many traditional recycling devices have poor filtration effects, failing to effectively remove various impurities from the wastewater, resulting in substandard purity of the recycled liquid, making it difficult to reuse in printing production or other fields. Simultaneously, in the activated carbon adsorption stage, the maintenance and replacement of activated carbon are complex, increasing the workload of operators and affecting the operating efficiency of the recycling device. Furthermore, some recycling devices have poor sealing performance, easily leading to wastewater leakage, which not only wastes resources but may also damage the surrounding environment and equipment. Moreover, unreasonable installation and fixing methods for device components make equipment maintenance and repair inconvenient, increasing downtime and maintenance costs.

[0003] Therefore, it is of great significance to develop an ink washing waste liquid recycling device that can efficiently filter ink washing waste liquid, is easy to maintain with activated carbon, has good sealing performance, and is convenient to install and fix. Summary of the Invention

[0004] To address the aforementioned technical problems, this application solves the issues in the prior art where various impurities in ink washing wastewater cannot be effectively removed, resulting in low purity of the recovered liquid, and the complex process of replacing and maintaining activated carbon.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a waste ink washing liquid recycling device for printing, comprising a support frame, on which a primary filter tube, an upper secondary filter tube, a lower secondary filter tube, and a tertiary filter tube are fixedly installed. An observation cover is installed on both the upper and lower secondary filter tubes. Multiple primary screening screens are fixedly installed on the primary filter tube, the primary screening screens being metal or polymer material filter screens with a pore size of 1 to 10 mm. A guide bucket and a microporous filter membrane are fixedly installed on the tertiary filter tube, the microporous filter membrane being selected with a pore size of 0.1 to 1 micrometer. Supporting filter screens, ring plates, and connecting rods are provided on both the upper and lower secondary filter tubes. The supporting filter screens are fixedly connected to the ring plates. Multiple sets of supporting filter screens and ring plates are provided on the connecting rods, which are slidably connected to the upper and lower secondary filter tubes. Activated carbon for adsorbing pigments in the waste ink washing liquid is placed on the supporting filter screens.

[0006] Preferably, the upper and lower secondary filter tubes have a three-way structure, which are respectively the inlet, outlet, and replacement port.

[0007] Preferably, the support filter and the ring plate are provided with grooves for mounting the connecting rod.

[0008] Preferably, a cover plate is fixedly mounted on the connecting rod, a main shaft is fixedly mounted on the cover plate, and multiple sealing plugs and support plates are fixedly mounted on the main shaft.

[0009] Preferably, the sealing plug and the support plate are arranged alternately, with the sealing plug serving as support and the support plate serving as sealing.

[0010] Preferably, a limiting plate is slidably provided on the support plate, and two limiting parts are symmetrically provided on the limiting plate. The limiting parts are arc-shaped rod-shaped structures.

[0011] Preferably, two limiting rods are fixedly installed on the upper secondary filter tube and the lower secondary filter tube. The two limiting rods are circumferentially distributed and have an arc-shaped structure.

[0012] Preferably, a spring is sleeved on the main shaft, and the two ends of the spring are fixedly connected to the limiting plate and the main shaft respectively. A gripping plate is fixedly installed on the limiting plate.

[0013] The technical solution provided in this application has the following advantages compared with the prior art:

[0014] 1. The primary filter tube of this application is equipped with a pre-screen filter with a pore size of 1-10 mm, which can effectively intercept larger solid impurities such as paper fibers, paper scraps, large dust particles and metal shavings in ink washing waste liquid, achieve preliminary solid-liquid separation, and reduce the burden of subsequent filtration.

[0015] 2. The upper and lower secondary filter tubes of this application are densely packed with activated carbon, which adsorbs the waste liquid after the initial screening twice, effectively removing pigments and some organic pollutants. By extending the flow time of the waste liquid in the tubes, the adsorption effect is significantly improved, and the purity of the recovered liquid is enhanced.

[0016] 3. The microporous filter membrane of the three-stage filter tube of this application has a pore size of 0.1-1 micrometer, which can filter out residual pigments and resin fine particles, small molecular aggregates and microorganisms and other tiny particles and colloidal substances, ensuring that the final discharged liquid is sufficiently pure and meets the recycling standards.

[0017] 4. The upper and lower two-stage filter tubes of this application are equipped with observation covers to facilitate staff to observe the adsorption effect of activated carbon and the flow rate of waste liquid in real time, and to determine in a timely manner whether activated carbon needs to be replaced, so as to ensure the continuity and stability of the filtration effect.

[0018] 5. The secondary filter tube of this application adopts a three-way structure with a dedicated replacement port. The support filter screen and ring plate are installed through a connecting rod. When replacing, simply pull out the connecting rod to move the support filter screen and ring plate, which facilitates disassembly and maintenance and improves work efficiency.

[0019] 6. The cover plate on the connecting rod of this application fixes the main shaft, and the sealing plug on the main shaft is in close contact with the inner wall of the secondary filter tube to achieve effective sealing of the replacement port and prevent ink waste liquid leakage. The support plate supports and limits the sealing plug to ensure the stability of the sealing plug and avoid displacement that would lead to sealing failure.

[0020] 7. In this application, the sealing plug and the support plate are staggered. By controlling the gap between the two, the deformation of the sealing plug is limited, which not only ensures the sealing effect but also extends the service life of the sealing plug and reduces the cost and workload caused by frequent replacement of sealing components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 This is a cross-sectional view of this application;

[0023] Figure 3 for Figure 2 Enlarged view of the local structure at point A;

[0024] Figure 4 for Figure 2 Enlarged view of the local structure at point B;

[0025] Figure 5 This is a schematic diagram of the structure of the secondary filter tube in this application;

[0026] Figure 6 This is a schematic diagram of the connecting rod in this application;

[0027] Figure 7 for Figure 6 Enlarged view of the local structure at point C;

[0028] Figure 8 This is a schematic diagram of the structure supporting the filter screen in this application;

[0029] In the diagram: 101-Support frame; 102-First-stage filter tube; 103-Upper second-stage filter tube; 104-Observation cover; 105-Lower second-stage filter tube; 106-Third-stage filter tube; 107-Primary sieve screen; 108-Guide hopper; 109-Microporous filter membrane; 110-Support filter screen; 111-Ring plate; 112-Connecting rod; 113-Cover plate; 114-Main shaft; 115-Sealing plug; 116-Support plate; 117-Spring; 118-Holding plate; 119-Limiting plate; 120-Limiting rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] like Figures 1 to 8 As shown, a waste ink recovery device for printing includes a support frame 101. A primary filter tube 102, an upper secondary filter tube 103, a lower secondary filter tube 105, and a tertiary filter tube 106 are fixedly installed on the support frame 101. An observation cover 104 is installed on both the upper secondary filter tube 103 and the lower secondary filter tube 105. Multiple primary screening screens 107 are fixedly installed on the primary filter tube 102. The primary screening screens 107 are made of metal or polymer material with a pore size of 1 to 10 mm. The tertiary filter tube 106 is fixedly installed with... The guide hopper 108 and the microporous filter membrane 109 are selected. The microporous filter membrane 109 has a pore size of 0.1 to 1 micrometer. The upper secondary filter tube 103 and the lower secondary filter tube 105 are equipped with a support filter screen 110, a ring plate 111 and a connecting rod 112. The support filter screen 110 is fixedly connected to the ring plate 111. The connecting rod 112 is equipped with multiple sets of support filter screens 110 and ring plates 111. The connecting rod 112 is slidably connected to the upper secondary filter tube 103 and the lower secondary filter tube 105. Activated carbon for adsorbing pigments in ink washing waste liquid is placed on the support filter screen 110.

[0033] Specifically, it serves as the main supporting structure of the entire recycling device, providing an installation foundation for other components and ensuring the stability of each component during operation; it is a robust metal frame.

[0034] Multiple primary screening screens 107, made of metal or polymer materials with pore sizes of 1 to 10 mm, are fixedly installed on the primary filter tube 102. This part constitutes the primary filtration unit, mainly used to filter larger solid impurities in ink washing wastewater, such as paper fibers, paper scraps, larger dust particles, and metal shavings. When the ink washing wastewater enters the recovery device, it first passes through the primary screening screens 107. Impurities larger than the pore size are intercepted, while substances smaller than the pore size pass through the screen with the liquid, achieving preliminary solid-liquid separation. For example, in practical applications, if metal screens are used, stainless steel can be selected, as it has good corrosion resistance and mechanical strength, and can work stably for a long time.

[0035] The microporous filter membrane 109 primarily filters out tiny particles and colloidal substances, such as residual pigments and resin particles, small molecular aggregates not adsorbed by activated carbon, and some microorganisms. These substances typically range in size from 0.1 to 1 micrometer. Only substances smaller than the pore size of the filter membrane can pass through, while particles and colloidal substances larger than the pore size are intercepted by the microporous filter membrane 109.

[0036] In use, the ink waste liquid is fed into the upper end of the primary filter tube 102 via an external conveying mechanism. Then, under gravity, it flows downwards, undergoing preliminary filtration through multiple primary screening screens 107 within the primary filter tube 102 to intercept larger impurities. The pre-filtered liquid then enters the upper secondary filter tube 103, where activated carbon placed between multiple sets of supporting screens 110 and ring plates 111 adsorbs pigments (from the ink pigments and dyes) and some organic pollutants, such as small-molecule organic additives and residual ink components. After passing through the upper secondary filter tube 103, the ink waste liquid enters the lower secondary filter tube 105, where it is again adsorbed by activated carbon. Finally, it enters the tertiary filter tube 106, where it is guided by the guide bucket 108 onto the microporous filter membrane 109. The micropores of the microporous filter membrane 109 then perform finer filtration, ultimately discharging sufficiently pure liquid.

[0037] The activated carbon is densely arranged in the upper secondary filter tube 103 and the lower secondary filter tube 105, thereby reducing the flow rate of the liquid and increasing the flow time in the upper secondary filter tube 103 and the lower secondary filter tube 105. By increasing the adsorption time of the activated carbon, the final adsorption effect is improved.

[0038] Both the upper secondary filter tube 103 and the lower secondary filter tube 105 are fixedly equipped with observation covers 104. The observation covers 104 are used to observe the activated carbon in the support filter screen 110 and the ring plate 111 installed inside, to observe its adsorption effect and the flow rate of waste liquid, so that the staff can determine whether the activated carbon needs to be replaced.

[0039] like Figure 2 As shown, the upper secondary filter tube 103 and the lower secondary filter tube 105 have a three-way structure, namely the inlet, the outlet, and the replacement port. Specifically, the inlet is used for the liquid produced in the previous process to flow in, the outlet is used for the liquid produced in this process to flow out, and the replacement port is used for replacing and maintaining the activated carbon in this process.

[0040] like Figure 8 As shown, the support filter 110 and the ring plate 111 are provided with grooves for installing the connecting rod 112.

[0041] Specifically, a crossbar is installed at the end of the connecting rod 112 away from the main shaft 114. This crossbar is used to support multiple sets of ring plates 111 and support filter screens 110. When replacing them, the connecting rod 112 is pulled out, and the crossbar can be used to push the multiple sets of support filter screens 110 and ring plates 111 to move. The grooves of the support filter screens 110 and ring plates 111 prevent the connecting rod 112 from rotating on the support filter screens 110 and ring plates 111, and only allows for directional sliding. This ensures that the connecting rod 112, support filter screens 110 and ring plates 111 are in close contact with the inner wall of the upper secondary filter tube 103 or the lower secondary filter tube 105. After removal, by disassembling the crossbar on the connecting rod 112, the restriction of the crossbar on the multiple sets of support filters 110 and ring plates 111 is released. The operator can control the support filters 110 and ring plates 111 to move on the connecting rod 112 in a direction away from the main shaft 114, thereby maintaining the support filters 110 and ring plates 111 or replacing the activated carbon on them.

[0042] like Figure 4 and Figure 7 As shown, a cover plate 113 is fixedly installed on the connecting rod 112, a main shaft 114 is fixedly installed on the cover plate 113, and a plurality of sealing plugs 115 and a support plate 116 are fixedly installed on the main shaft 114.

[0043] Specifically, the replacement port is sealed by the tight contact between the sealing plug 115 and the inner wall of the upper secondary filter tube 103 or the lower secondary filter tube 105, thereby preventing ink waste liquid from being discharged from this channel. The support plate 116 supports and limits the multiple sealing plugs 115 in the upper secondary filter tube 103 or the lower secondary filter tube 105 to prevent the sealing plugs 115 from shifting and losing their sealing effect.

[0044] like Figure 6 and Figure 7 As shown, the sealing plug 115 and the support plate 116 are arranged alternately, with the sealing plug 115 used for support and the support plate 116 used for sealing.

[0045] Specifically, the sealing plugs 115 and support plates 116 are staggered to ensure stable support for each sealing plug 115. The gap between the sealing plug 115 and the support plate 116 limits the deformation of the sealing plug 115, thereby improving its sealing effect. The sealing plug 115 is made of a flexible sealing material, such as rubber, and its size is slightly larger than the replacement port. When the sealing plug 115 is installed into the replacement port, the opening of the replacement port pushes the outer edge of the sealing plug 115, causing it to tilt upwards. This deformation of the outer edge of the sealing plug 115 achieves a seal. As the movement of the sealing plug 115 continues, this deformation will continue to increase due to friction until the outer edge of the sealing plug 115 is deformed to its maximum extent. Maintaining this state for a long time will greatly reduce the service life of the sealing plug 115. Therefore, it is necessary to limit the degree of deformation of the sealing plug 115. By controlling the gap between the support plate 116 and the sealing plug 115, the sealing plug 115 is blocked. This gap is the space where the sealing plug 115 can deform, thereby limiting the degree of deformation of the sealing plug 115, ensuring the sealing effect while ensuring service life.

[0046] like Figure 7 As shown, a limiting plate 119 is slidably provided on the support plate 116, and two limiting parts are symmetrically provided on the limiting plate 119. The limiting parts are arc-shaped rod structures.

[0047] like Figure 1 As shown, two limiting rods 120 are fixedly installed on the upper secondary filter tube 103 and the lower secondary filter tube 105. The two limiting rods 120 are circumferentially distributed and have an arc-shaped structure, which cooperates with the limiting part on the limiting plate 119.

[0048] like Figure 5 and Figure 7 As shown, a spring 117 is sleeved on the main shaft 114. The two ends of the spring 117 are fixedly connected to the limiting plate 119 and the main shaft 114, respectively. A gripping plate 118 is fixedly installed on the limiting plate 119.

[0049] Specifically, the limiting portions at both ends of the limiting plate 119 are provided with two arc-shaped extended rods, and the limiting rod 120 is connected to the replacement port of the upper secondary filter tube 103 and the lower secondary filter tube 105 through a connecting block. The connecting block is only connected to one end of the limiting rod 120, which is also an arc-shaped extended rod. The other end is not provided with a connecting block. Because the two limiting rods 120 are circumferentially set, the position of their connecting blocks is symmetrical about the center.

[0050] When installing the new support filter 110 and ring plate 111 into the upper secondary filter tube 103 or lower secondary filter tube 105, align the end of the connecting rod 112 away from the main shaft 114 with the replacement port, and then manually control the holding plate 118. Push the limiting plate 119 through the holding plate 118, and then compress the spring 117 on the main shaft 114 through the limiting plate 119. One part of the spring 117 is fixed to the main shaft 114, so the main shaft 114 is moved by the spring 117. The main shaft 114 pushes the connecting rod 112 to slide on the inner wall of the upper secondary filter tube 103 or lower secondary filter tube 105 and enter the predetermined position.

[0051] When the limiting plate 119 moves to the connecting block between the limiting rod 120 and the opening of the replacement port, that is, when the limiting plate 119 and the connecting block are on the same plane and the limiting plate 119 is located in the space between the limiting rod 120 and the replacement port, the holding plate 118 and the limiting plate 119 are rotated 90 degrees. This causes the two limiting parts on the limiting plate 119 to insert into the space between the limiting rod 120 and the replacement port, stopping rotation upon contact with the connecting block. Then, the holding plate 118 is released, and the spring force of the spring 117 pushes the limiting plate 119, maintaining a large frictional force between the limiting plate 119 and the limiting rod 120, thus fixing the relative position of the limiting plate 119 and the holding plate 118 after installation. For replacement, the control is reversed.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wash-up waste recovery device for printing comprising a support frame (101) characterised in that: The support frame (101) is fixedly installed with a primary filter tube (102), an upper secondary filter tube (103), a lower secondary filter tube (105), and a tertiary filter tube (106). An observation cover (104) is installed on both the upper secondary filter tube (103) and the lower secondary filter tube (105). Multiple primary screening screens (107) are fixedly installed on the primary filter tube (102). The primary screening screens (107) are made of metal or polymer materials with a pore size of 1 to 10 mm. A guide bucket (108) and a microporous filter membrane (109) are fixedly installed on the tertiary filter tube (106). The microporous filter membrane (109) has a pore size of 0.1 to 1 micrometer. The upper secondary filter tube (103) and the lower secondary filter tube (105) are equipped with a support filter screen (110), a ring plate (111) and a connecting rod (112). The support filter screen (110) is fixedly connected to the ring plate (111). The connecting rod (112) is equipped with multiple sets of support filter screens (110) and ring plates (111). The connecting rod (112) is slidably connected to the upper secondary filter tube (103) and the lower secondary filter tube (105). Activated carbon for adsorbing pigments in ink washing waste liquid is placed on the support filter screen (110).

2. A wash-up waste fluid recovery unit for printing according to claim 1 characterised in that: The upper secondary filter tube (103) and the lower secondary filter tube (105) have a three-way structure, which are the inlet, outlet and replacement port, respectively.

3. A wash-up waste fluid recovery apparatus for printing according to claim 2, wherein: The support filter (110) and the ring plate (111) are provided with grooves for installing the connecting rod (112).

4. A wash-up waste fluid recovery apparatus for printing according to claim 3, wherein: A cover plate (113) is fixedly installed on the connecting rod (112), a main shaft (114) is fixedly installed on the cover plate (113), and a plurality of sealing plugs (115) and a support plate (116) are fixedly installed on the main shaft (114).

5. A wash-up waste fluid recovery apparatus for printing according to claim 4, wherein: The sealing plug (115) and the support plate (116) are arranged alternately, with the sealing plug (115) used for support and the support plate (116) used for sealing.

6. A wash-up waste fluid recovery apparatus for printing according to claim 5, wherein: A limiting plate (119) is slidably provided on the support plate (116), and two limiting parts are symmetrically provided on the limiting plate (119). The limiting parts are arc-shaped rod structures.

7. A wash-up waste fluid recovery apparatus for printing according to claim 6, wherein: Two limiting rods (120) are fixedly installed on the upper secondary filter tube (103) and the lower secondary filter tube (105). The two limiting rods (120) are distributed in a circle and have an arc-shaped structure.

8. A waste ink recovery device for printing according to claim 7, characterized in that: A spring (117) is sleeved on the main shaft (114). The two ends of the spring (117) are fixedly connected to the limiting plate (119) and the main shaft (114) respectively. A gripping plate (118) is fixedly installed on the limiting plate (119).

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