A printing solvent harmless recovery system

Abstract

The application relates to a printing solvent harmless recovery system and belongs to the field of printing waste liquid recovery. The system comprises a treatment box and an air float plate arranged at the bottom of the treatment box, a plurality of air outlets are formed in the air float plate, the treatment box is a cylindrical box body, a rotating shaft is rotationally arranged in the treatment box, a filter screen plate is arranged on the rotating shaft, a driving mechanism is arranged on the treatment box, the driving mechanism is connected with the rotating shaft and is used for driving the rotating shaft to rotate, a brush plate and a lifting mechanism are arranged on the filter screen plate, bristles on the brush plate abut against the filter screen plate, the lifting mechanism is connected with the brush plate and is used for driving the brush plate to move in the vertical direction, an arc-shaped slag collecting plate is connected to the top of the filter screen plate, and the opening direction of the slag collecting plate faces the rotating direction of the filter screen plate. The application has the effect of improving the treatment effect of flocculation and small particle suspended matters in the printing waste liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing waste liquid recovery, and particularly relates to a printing solvent harmless recovery system. BACKGROUND

[0002] Water-based ink is widely used in the printing of food and toy packaging due to its high safety. In the printing process of food packaging bags, a large amount of ink wastewater is generated, which contains a large amount of harmful ingredients and causes great environmental pollution and high treatment cost.

[0003] The existing patent with the application publication number CN110776075A discloses a printing waste liquid harmless centralized recovery and treatment system, which specifically discloses a treatment box, an air floating plate capable of reciprocating up and down along the vertical direction arranged in the treatment box, a driving motor arranged on the upper side of the treatment box, and a stirring and residue pushing component arranged on the output shaft of the driving motor. The stirring and residue pushing assembly stirs the printing waste liquid to accelerate the reaction speed of the printing waste liquid with the flocculant and the pH regulator, and the generated flocculating material is floated under the action of the air floating plate, and then the flocculating material or fine particles are pushed out by the stirring and residue pushing assembly.

[0004] According to the related technology in the above, the bubbles generated by the air floating plate can only drive part of the flocculating material and fine particles to float, and a large amount of flocculating material and fine particles are suspended in the printing waste liquid, so that the treatment effect of the flocculating material and fine particle suspensions in the printing waste liquid treatment process is poor. SUMMARY

[0005] In order to improve the treatment effect of the flocculating material and fine particle suspensions in the printing waste liquid, the present application provides a printing solvent harmless recovery system.

[0006] The printing solvent harmless recovery system provided by the present application adopts the following technical scheme:

[0007] A printing solvent harmless recovery system, comprising a treatment box and an air floating plate arranged at the bottom of the treatment box, a plurality of air outlets are formed in the air floating plate, the treatment box is a cylindrical box body, a rotating shaft is arranged in the treatment box, a filter screen plate is arranged on the rotating shaft, a driving mechanism is arranged on the treatment box, the driving mechanism is connected with the rotating shaft and is used to drive the rotating shaft to rotate, a brush plate and a lifting mechanism are arranged on the filter screen plate, the bristles on the brush plate abut against the filter screen plate, the lifting mechanism is connected with the brush plate and is used to drive the brush plate to move along the vertical direction, an arc-shaped residue collecting plate is connected to the top of the filter screen plate, and the opening direction of the residue collecting plate faces the rotating direction of the filter screen plate.

[0008] By adopting the above technical scheme, the bubbles discharged by the air floating plate drive part of the flocculating substance and the fine particles to float upwards, and the driving mechanism drives the rotating shaft to rotate, thereby driving the filter screen plate to rotate, the filter screen plate allows the wastewater to pass through, but the flocculating substance and the fine suspended particles in the printing waste liquid are attached and accumulated on one side of the filter screen plate in the rotating direction, the lifting mechanism drives the brush plate to move upwards, the brush plate brushes the deposits on the filter screen plate upwards into the slag collecting plate, thereby more comprehensively cleaning the flocculating substance and the fine suspended particles in the printing waste liquid, and the treatment effect of the flocculating substance and the fine suspended particles in the printing waste liquid is improved.

[0009] Optionally, the driving mechanism comprises a driving motor, the top of the treatment box is provided with a support, the driving motor is arranged on the support, and an output shaft of the driving motor extends vertically downward and is fixedly connected with the rotating shaft in the same axis.

[0010] By adopting the above technical scheme, the driving motor is started, and the driving motor drives the rotating shaft to rotate, thereby achieving the effect of conveniently driving the filter screen plate to rotate.

[0011] Optionally, the lifting mechanism comprises guide rails and a moving piece, two guide rails are vertically and oppositely arranged on one side of the filter screen plate in the rotating direction, the brush plate is slidably arranged on the guide rails, and the moving piece is connected with the brush plate and is used for driving the brush plate to move along the guide rails.

[0012] By adopting the above technical scheme, the moving piece drives the brush plate to move along the guide rails, and the brush plate brushes the flocculating substance and the fine particles attached to the filter screen plate during the movement, thereby brushing the flocculating substance and the fine particles upwards into the slag collecting plate, and the flocculating substance and the fine particles on the filter screen plate are conveniently cleaned.

[0013] Optionally, the moving piece comprises a first arc-shaped plate, a second arc-shaped plate, a sliding plate and a baffle, the baffle has two half-circular plate bodies, the two baffle plates are slidably arranged on the two guide rails respectively, the first arc-shaped plate and the second arc-shaped plate are connected and arranged between the two baffle plates, the first arc-shaped plate is away from the filter screen plate, and the second arc-shaped plate is close to the filter screen plate, the sliding plate is also an arc-shaped plate, both ends of the sliding plate are provided with sliding rods, arc-shaped sliding holes are formed in the baffle plates for the sliding rods to pass through, and the sliding plate is slidably arranged between the two baffle plates; when one end of the sliding plate abuts against the first arc-shaped plate and the other end of the sliding plate overlaps the second arc-shaped plate, a hollow half-cylindrical closed space is formed between the first arc-shaped plate, the second arc-shaped plate, the sliding plate and the two baffle plates, the baffle is connected with the brush plate, the baffle is provided with a retaining piece, the retaining piece makes the sliding plate always have a tendency to move towards the first arc-shaped plate, and the rotating shaft is further provided with a poking piece for driving the sliding plate to move away from the first arc-shaped plate.

[0014] By adopting the above technical scheme, since the gas floating plate for continuously discharging gas is arranged at the bottom of the treatment box, when the sliding plate slides to one end abutting against the first arc-shaped plate and the other end overlapping the second arc-shaped plate, the gas is accumulated in the closed space formed between the first arc-shaped plate, the second arc-shaped plate, the sliding plate and the two baffle plates, so that the floating force of the gas is applied to the moving piece, when the floating force is greater than the gravity of the moving piece and the brush plate, the moving piece moves upward along the guide rail, and then drives the brush plate to move upward; when the brush plate moves to the top of the liquid surface, the driving piece drives the sliding plate to move away from the first arc-shaped plate, a gap is formed between the sliding plate and the first arc-shaped plate, the accumulated gas in the closed space is discharged, and the moving piece and the brush plate move downward under the action of gravity; when the moving piece moves downward to be separated from the driving piece, the sliding plate moves again to abut against the first arc-shaped plate under the action of the retaining piece, the closed space is formed again and the air is accumulated; so that the moving piece moves periodically along the guide rail, and the effect of driving the brush plate to reciprocatingly brush the filter screen plate is realized.

[0015] Optionally, the retaining piece comprises a tension spring, one end of the tension spring is connected with the sliding rod, and the other end of the tension spring is connected with the side of the baffle plate opposite to the first arc-shaped plate.

[0016] By adopting the above technical scheme, the tension spring provides a pulling force for the sliding plate, so that the sliding plate always has a tendency to move towards the first arc-shaped plate.

[0017] Optionally, the driving piece comprises a driving rod and a pneumatic cylinder, the driving rod is rotationally arranged on the rotating shaft and located above the filter screen plate, the lower end of the driving rod extends away from the rotating shaft, the pneumatic cylinder is hingedly arranged on the rotating shaft and located at the upper end of the driving rod, and the piston rod of the pneumatic cylinder is hingedly connected with the upper end of the driving rod.

[0018] By adopting the above technical scheme, when the moving piece moves upward along the guide rail and the sliding rod moves to the position between the rotating shaft and the driving rod, the pneumatic cylinder is started, the piston rod of the pneumatic cylinder extends, drives the lower end of the driving rod to rotate towards the rotating shaft, and drives the sliding rod to move, so that the sliding plate moves away from the first arc-shaped plate, a gap is left between the sliding plate and the first arc-shaped plate, and the effect of facilitating the movement of the sliding plate away from the first arc-shaped plate is achieved.

[0019] Optionally, the slag collecting plate is provided with a scraper and a cleaning piece, the cleaning piece is connected with the scraper and is used to drive the scraper to move along the slag collecting plate.

[0020] By adopting the above technical scheme, the cleaning piece drives the scraper to move away from the rotating shaft along the slag collecting plate, so that the flocculation and fine particles collected in the slag collecting plate are scraped out of the treatment box, and the effect of facilitating the cleaning of the flocculation and fine particles in the slag collecting plate is achieved.

[0021] Optionally, the cleaning member comprises a waterproof motor, a lead screw and a guide rod, the lead screw and the guide rod are arranged on the slag collecting plate, the scraper is threadedly sleeved on the lead screw, the guide rod penetrates through the scraper, and the waterproof motor is arranged on the slag collecting plate and is fixedly connected with the lead screw in a coaxial line.

[0022] By adopting the above technical scheme, the waterproof motor is started, the waterproof motor drives the lead screw to rotate, and then drives the scraper to move along the length direction of the lead screw, so that the effect of facilitating the movement of the scraper is achieved.

[0023] Optionally, the slag collecting plate and the scraper are both made of a mesh plate.

[0024] By adopting the above technical scheme, the slag collecting plate and the scraper are both made of a mesh plate, so that the resistance of the waste liquid to the slag collecting plate and the scraper during operation is reduced while the flocculation and the fine particles are scraped.

[0025] Optionally, a collecting box is arranged outside the treatment box.

[0026] By adopting the above technical scheme, the collecting box collects the flocculation and the fine particles scraped to the outside of the slag collecting plate.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The air bubbles discharged by the air floatation plate drive part of the flocculation and the fine particles to float up, and at the same time, the driving mechanism drives the rotating shaft to rotate, thereby driving the filter screen plate to rotate. The filter screen plate allows the wastewater to pass through, but the flocculation and the fine suspended particles in the printing waste liquid are attached and accumulated on one side of the filter screen plate in the rotating direction. The lifting mechanism drives the brush plate to move upward, and the brush plate brushes the deposits on the filter screen plate upward to the slag collecting plate, so that the flocculation and the fine suspended particles in the printing waste liquid are more comprehensively cleaned, and the treatment effect of the flocculation and the fine suspended particles in the printing waste liquid is improved.

[0029] 2. Since the treatment box is provided with the air floatation plate which continuously discharges gas, when the sliding plate slides to one end and abuts against the first arc-shaped plate and the other end overlaps the second arc-shaped plate, the gas is accumulated in the closed space formed by the first arc-shaped plate, the second arc-shaped plate, the sliding plate and the two baffles, so that the moving piece is subjected to the buoyancy of the gas. When the buoyancy is greater than the weight of the moving piece and the brush plate, the moving piece moves upward along the guide rail, thereby driving the brush plate to move upward. During the floating process, the brush plate brushes the filter screen plate and brushes the flocculation and the fine particles accumulated on the filter screen plate into the slag collecting plate.

[0030] 3. When the brush plate moves to the top of the liquid surface, the pusher drives the sliding plate to move away from the first arc-shaped plate, a gap appears between the sliding plate and the first arc-shaped plate, the accumulated gas in the sealed space is discharged, and the moving part and the brush plate move downward under the action of gravity; when the moving part moves downward to disengage from the pusher, the sliding plate is driven by the retainer to move again to abut against the first arc-shaped plate, and the sealed space is formed again to accumulate the air discharged by the air float plate; so that the moving part moves periodically along the guide rail, thereby realizing the effect of driving the brush plate to reciprocate to brush the filter screen plate. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the embodiment of the application.

[0032] Figure 2 is a sectional view for showing the internal structure of the processing box in the embodiment of the application.

[0033] Figure 3 is a structural schematic diagram of the lifting mechanism in the embodiment of the application.

[0034] Figure 4 is a structural schematic diagram of the moving part in the embodiment of the application.

[0035] Figure 5 is a schematic diagram of the slag collecting plate structure in the embodiment of the application.

[0036] BRIEF DESCRIPTION OF DRAWINGS:

[0037] 1, processing box; 11, air float plate; 12, rotating shaft; 13, filter screen plate; 14, brush plate; 15, collection box; 2, driving mechanism; 21, driving motor; 22, support; 3, lifting mechanism; 31, guide rail; 32, moving part; 321, first arc-shaped plate; 322, second arc-shaped plate; 323, sliding plate; 3231, sliding rod; 324, baffle; 3241, sliding hole; 3242, guide block; 3243, connecting plate; 4, slag collecting plate; 41, scraper; 42, cleaning part; 421, waterproof motor; 422, lead screw; 423, guide rod; 5, retainer; 51, tension spring; 6, pusher; 61, push rod; 62, air cylinder; 63, mounting rod. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying drawings Figures 1-5 The application will be further described in detail.

[0039] The embodiment of the application discloses a printing solvent harmless recovery system, which refers to Figure 1 and Figure 2The printing solvent harmless recovery system comprises a hollow cylindrical treatment box 1 with an open upper end and an air float plate 11 installed at the bottom of the treatment box 1, wherein a plurality of air outlet holes are formed in the air float plate 11, and the air float plate 11 is connected with an external air supply device. A rotating shaft 12 is rotatably installed in the treatment box 1 and coincides with the axis of the treatment box 1, one side of the rotating shaft 12 is provided with a filter screen plate 13, the filter screen plate 13 is a rectangular screen plate, the upper end of the filter screen plate 13 is flush with the opening of the treatment box 1, the hole diameter of the filter screen plate 13 is smaller than that of the flocculation and fine particles in the printing solvent, and the flocculation and fine particles cannot pass through while allowing water to pass through. A driving mechanism 2 is installed on the treatment box 1, the driving mechanism 2 is connected with the rotating shaft 12 and is used to drive the rotating shaft 12 to rotate. A brush plate 14 and a lifting mechanism 3 are installed on the filter screen plate 13, the brush plate 14 is located on the side of the filter screen plate 13 facing the rotating direction, the brush plate 14 is a horizontally arranged rectangular plate body, the bristles of the brush plate 14 extend towards the filter screen plate 13 and abut against the filter screen plate 13. The lifting mechanism 3 is connected with the brush plate 14 and is used to drive the brush plate 14 to move in the vertical direction. An arc-shaped slag collecting plate 4 is connected and installed at the top of the filter screen plate 13, the opening direction of the slag collecting plate 4 faces the rotating direction of the filter screen plate 13, and the end of the slag collecting plate 4 away from the rotating shaft 12 extends out of the treatment box 1.

[0040] When the printing waste liquid is treated, the printing waste liquid is input into the treatment box 1, and a flocculating agent and a pH adjusting agent are added into the treatment box 1, the air float plate 11 continuously discharges air bubbles at the bottom of the treatment box 1, the air bubbles float and drive part of the flocculation and fine suspended particles to float, but part of the flocculation and fine suspended particles are still suspended in the waste liquid. At this time, the driving mechanism 2 is used to drive the rotating shaft 12 to rotate, the rotating shaft 12 drives the filter screen plate 13 to rotate, the filter screen plate 13 allows the waste water to pass through, but the flocculation and fine suspended particles in the printing waste liquid are attached and accumulated on the side of the filter screen plate 13 in the rotating direction. The lifting mechanism 3 is used to drive the brush plate 14 to move upwards, the brush plate 14 brushes the deposits on the filter screen plate 13 upwards into the slag collecting plate 4, and then the accumulated material on the slag collecting plate 4 is scraped along the slag collecting plate 4 to the outside of the treatment box 1. Thus, the flocculation and fine suspended particles in the printing waste liquid are more comprehensively cleaned, and the treatment effect of the flocculation and fine suspended particles in the printing waste liquid is improved. At the same time, the waste liquid is fully stirred during the rotation of the filter screen plate 13, so that the flocculating agent and the pH adjusting agent fully react with the printing waste liquid, and the waste liquid treatment effect is improved.

[0041] Reference Figure 1 and Figure 2The driving mechanism 2 comprises a driving motor 21, a support 22 is installed on the processing box 1 and located at the top of the processing box 1, the support 22 is a C-shaped plate body, the driving motor 21 is fixedly installed on the support 22 and located directly above the rotating shaft 12, and the output shaft of the driving motor 21 extends vertically downward and is fixedly connected with the rotating shaft 12 in the same axis line. When the driving motor 21 is started, the rotating shaft 12 is driven to rotate, thereby facilitating the rotation of the filter screen plate 13.

[0042] With reference to Figure 2 and Figure 3 The lifting mechanism 3 comprises guide rails 31 and a moving piece 32, two guide rails 31 are vertically installed on the side of the filter screen plate 13 facing the rotating direction, the lower ends of the two guide rails 31 are connected to the filter screen plate 13 through connecting rods, the two guide rails 31 are both cylindrical pole bodies and vertically extend upward, and a reinforcing rod is connected to the top ends of the two guide rails 31. The brush plate 14 is slidingly installed on the guide rails 31, and the moving piece 32 is connected with the brush plate 14 and used to drive the brush plate 14 to move along the length direction of the guide rails 31.

[0043] With reference to Figure 3 and Figure 4 The moving piece 32 comprises first arc-shaped plates 321, second arc-shaped plates 322, sliding plates 323 and baffle plates 324, the baffle plates 324 are semicircular plate bodies, there are two baffle plates 324 and the two baffle plates 324 are slidingly connected with the two guide rails 31 respectively, guide blocks 3242 are fixedly connected to one side of the baffle plates 324, the guide blocks 3242 are slidingly sleeved on the guide rails 31, and the two baffle plates 324 are opposite to each other and the diameters of the baffle plates 324 are parallel to the ground. The first arc-shaped plates 321 and the second arc-shaped plates 322 are connected and installed between the two baffle plates 324, the first arc-shaped plates 321 are away from the filter screen plate 13, the outer walls of the first arc-shaped plates 321 are flush with the edges of the baffle plates 324, the second arc-shaped plates 322 are close to the filter screen plate 13, the outer diameters of the second arc-shaped plates 322 are the same as the inner diameters of the first arc-shaped plates 321, the sliding plates 323 are also arc-shaped plates and the arc degrees of the sliding plates 323 are the same as the arc degrees of the first arc-shaped plates 321, the sliding plates 323 are located outside the second arc-shaped plates 322 and the sliding plates 323 and the first arc-shaped plates 321 are located on the same circumference. The two ends of the sliding plates 323 are both fixedly connected with cylindrical sliding rods 3231, the diameters of the sliding rods 3231 are smaller than the thicknesses of the sliding plates 323, arc-shaped sliding holes 3241 are formed in the baffle plates 324 for the sliding rods 3231 to pass through, and the sliding plates 323 are slidingly installed between the two baffle plates 324 through the sliding rods 3231. Sliding grooves (not shown in the figure) matched with the sliding plates 323 are also formed in the opposite sides of the two baffle plates 324, so that the sliding plates 323 can only slide in the circumferential direction. When the sliding plates 323 slide to one end abutting against the first arc-shaped plates 321 and the other end overlapping with the second arc-shaped plates 322 (for example, the position shown in FIG. 6), the brush plate 14 is located at the position of the filter screen plate 13, and when the sliding plates 323 slide to the other end abutting against the first arc-shaped plates 321 and the other end overlapping with the second arc-shaped plates 322 (for example, the position shown in FIG. 7), the brush plate 14 is located at the position of the filter screen plate 13. Figure 4In the shown state, the first arc-shaped plate 321, the second arc-shaped plate 322, the sliding plate 323 and the two baffle plates 324 form a downwardly open hollow semi-cylindrical closed space. A connecting plate 3243 is vertically fixedly installed on the guide block 3242, and the brush plate 14 is fixedly installed on the top end of the connecting plate 3243, with the height of the brush plate 14 being higher than the highest end of the baffle plate 324. The baffle plate 324 is further provided with a retaining member 5 for enabling the sliding plate 323 to always have a tendency to move towards the first arc-shaped plate 321, and the retaining member 5 is in combination with Figure 2 The rotating shaft 12 is further provided with a poking member 6 for driving the sliding plate 323 to move away from the first arc-shaped plate 321.

[0044] Since the air float plate 11 is installed at the bottom of the treatment tank 1 for continuously discharging air, when the sliding plate 323 slides to one end abutting against the first arc-shaped plate 321 and the other end abutting against the second arc-shaped plate 322, the closed space formed by the first arc-shaped plate 321, the second arc-shaped plate 322, the sliding plate 323 and the two baffle plates 324 will accumulate the air discharged by the air float plate 11. The air accumulated in the moving member 32 causes the moving member 32 to be subjected to an upward floating force, and the air in the moving member 32 gradually increases, and the floating force acting on the moving member 32 continuously increases. When the floating force is greater than the weight of the moving member 32 and the brush plate 14 and the frictional resistance acting on the brush plate 14, the moving member 32 floats upwards along the guide rail 31, thereby driving the brush plate 14 to move upwards. The brush plate 14 moves to brush the flocculation and fine particles accumulated on the filter screen plate 13 upwards, and when the moving member 32 floats to the top of the liquid surface, the flocculation and fine particles are brushed into the slag collecting plate 4. At this time, the poking member 6 is used to drive the sliding plate 323 to move away from the first arc-shaped plate 321, and a gap is formed between the sliding plate 323 and the first arc-shaped plate 321, and the air accumulated in the closed space of the moving member 32 is discharged from the top, and the moving member 32 and the brush plate 14 sink downwards under the action of gravity. When the moving member 32 moves downwards to be separated from the poking member 6, the sliding plate 323 is driven by the retaining member 5 to move again to abut against the first arc-shaped plate 321, and the closed space is formed again. However, since there is no air in the closed space at this time, the air is slowly accumulated in the closed space, and at this time, the moving member 32 continues to sink to the bottom until the air accumulated in the closed space can provide sufficient floating force to drive the moving member 32 and the brush plate 14 to float upwards. Thus, the moving member 32 is periodically moved along the length direction of the guide rail 31, thereby driving the brush plate 14 to continuously and reciprocally brush the flocculation and fine particles on the filter screen plate 13 upwards into the slag collecting plate 4.

[0045] It is particularly noted that when the moving part 32 sinks with the brush plate 14, the moving part 32 will quickly sink to the bottom of the treatment tank 1 because there is not enough air in the sealed space to provide buoyancy, and during this period, there is not much flocculation and fine suspended particles accumulated on the filter screen plate 13, so the brush plate 14 will not brush much flocculation and fine suspended particles into the waste liquid when it moves downward. When the moving part 32 floats up, it needs to wait for a period of time for enough air to accumulate in the sealed space before it can float up. During this period, the filter screen plate 13 continues to rotate and collect flocculation and fine suspended particles in the waste liquid, so that the brush plate 14 can brush a large amount of accumulated material on the filter screen plate 13 upward each time it floats up.

[0046] With reference to Figure 3 , the retaining part 5 includes a tension spring 51, the sliding rods 3231 at both ends of the sliding plate 323 extend out of the baffle 324, one end of the tension spring 51 is fixedly connected with the sliding rod 3231, and the other end is connected with the baffle 324 on the side of the first arc-shaped plate 321, the tension spring 51 is always in a stretched state, so that the tension spring 51 always has a pulling force on the sliding rod 3231, so that the sliding plate 323 always has a tendency to move towards the first arc-shaped plate 321, and then the sliding plate 323 abuts against the first arc-shaped plate 321. In other embodiments, the retaining part 5 can also be a rubber strip.

[0047] With reference to Figure 2 and Figure 5 , the pushing part 6 includes a pushing rod 61 and an air cylinder 62, an installation rod 63 is installed on the rotating shaft 12 and above the guide rail 31, the installation rod 63 extends perpendicular to the plane of the filter screen plate 13 and in the direction of rotation of the filter screen plate 13. The pushing rod 61 is rotatably installed at the end of the installation rod 63, the lower end of the pushing rod 61 extends away from the rotating shaft 12, the cylinder body of the air cylinder 62 is hingedly installed on the installation rod 63, and the piston rod end of the air cylinder 62 is hingedly connected with the upper end of the pushing rod 61 above the installation rod 63. The length of the pushing rod 61 above the installation rod 63 is less than the length of the pushing rod 61 below the installation rod 63.

[0048] When the moving part 32 floats along the guide rail 31 and the sliding rod 3231 moves between the rotating shaft 12 and the pushing rod 61, the air cylinder 62 is started, the piston rod of the air cylinder 62 extends and drives the pushing rod 61 to rotate, the lower end of the pushing rod 61 rotates towards the rotating shaft 12, the pushing rod 61 pushes the sliding rod 3231 to move towards rotation, and then drives the sliding plate 323 to move away from the first arc-shaped plate 321, so that a gap is formed between the sliding plate 323 and the first arc-shaped plate 321, and the air in the sealed space of the moving part 32 is discharged from the gap.

[0049] With reference to Figure 2 and Figure 5The slag collecting plate 4 is provided with a scraper 41 and a cleaning member 42. The cleaning member 42 is connected with the scraper 41 and is used to drive the scraper 41 to move along the length direction of the slag collecting plate 4, so as to scrape the flocculation and fine particles accumulated on the slag collecting plate 4. The slag collecting plate 4 and the scraper 41 are both made of a mesh plate, which allows water to pass through while blocking the flocculation and fine particles, so as to collect the flocculation and fine particles while reducing the resistance received by the slag collecting plate 4 and the scraper 41, and avoiding pushing the waste water out of the treatment box 1. The cleaning member 42 includes a waterproof motor 421, a lead screw 422 and a guide rod 423. Two mounting seats are fixedly installed at the top of the two ends of the slag collecting plate 4. The lead screw 422 and the guide rod 423 are both horizontally installed between the two mounting seats. The lead screw 422 is rotationally arranged, and the guide rod 423 is fixedly arranged. The edge of the scraper 41 is attached to the inner wall of the slag collecting plate 4. One end of the scraper 41 is threadedly sleeved on the lead screw 422, and the guide rod 423 is slidably arranged through the scraper 41. The waterproof motor 421 is fixedly installed on one of the mounting seats, and the output shaft of the waterproof motor 421 is coaxially and fixedly connected with the lead screw 422.

[0050] The waterproof motor 421 is started, and the output shaft of the waterproof motor 421 drives the lead screw 422 to rotate, so as to drive the scraper 41 to move along the length direction of the slag collecting plate 4. When the scraper 41 moves, the flocculation and fine particles accumulated on the slag collecting plate 4 are scraped off, and the flocculation and fine particles are scraped out of the treatment box 1.

[0051] Referring to Figure 1 and Figure 2 A collection box 15 for collecting the flocculation and fine particles is further installed outside the treatment box 1. The flocculation and fine particles scraped off from the scraper 41 fall into the collection box 15 for storage and centralized treatment.

[0052] The implementation principle of the printing solvent harmless recovery system is as follows. When the printing waste liquid is treated, the printing waste liquid is input into the treatment box 1, and a flocculating agent and a pH adjusting agent are added into the treatment box 1. The air floating plate 11 continuously discharges air bubbles at the bottom of the treatment box 1. The air bubbles float upwards and drive part of the flocculation and fine particles to float upwards, but part of the flocculation and fine particles are still suspended in the waste liquid. At this time, the filter screen plate 13 is driven to rotate. The filter screen plate 13 allows the waste water to pass through, and the flocculation and fine particles in the printing waste liquid are attached and accumulated on one side of the filter screen plate 13 in the rotating direction of the filter screen plate 13. The air generated by the air floating plate 11 is continuously accumulated in the closed space of the moving member 32. The buoyancy force component received by the moving member 32 increases to drive the brush plate 14 to move upwards. The brush plate 14 brushes the deposits on the filter screen plate 13 upwards into the slag collecting plate 4. The accumulated material on the slag collecting plate 4 is scraped off by the scraper 41 to the outside of the treatment box 1.

[0053] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made in the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A harmless recycling system for printing solvents, comprising a processing tank (1) and an air flotation plate (11) disposed at the bottom of the processing tank (1), wherein the air flotation plate (11) is provided with a plurality of air outlet holes, characterized in that: The processing box (1) is a cylindrical box. A rotating shaft (12) is rotatably arranged inside the processing box (1). A filter screen plate (13) is arranged on the rotating shaft (12). A driving mechanism (2) is arranged on the processing box (1). The driving mechanism (2) is connected to the rotating shaft (12) and is used to drive the rotating shaft (12) to rotate. A brush plate (14) and a lifting mechanism (3) are arranged on the filter screen plate (13). The bristles on the brush plate (14) abut against the filter screen plate (13). The lifting mechanism (3) is connected to the brush plate (14) and is used to drive the brush plate (14) to move in the vertical direction. An arc-shaped slag collection plate (4) is connected to the top of the filter screen plate (13). The opening direction of the slag collection plate (4) faces the rotation direction of the filter screen plate (13). The lifting mechanism (3) includes a guide rail (31) and a moving part (32). The filter plate (13) has two guide rails (31) vertically facing each other on the side facing the rotation direction. The brush plate (14) is slidably mounted on the guide rail (31). The moving part (32) is connected to the brush plate (14) and is used to drive the brush plate (14) to move along the guide rail (31). The movable component (32) includes a first arc-shaped plate (321), a second arc-shaped plate (322), a sliding plate (323), and a baffle (324). The baffle (324) consists of two semi-circular plates, each slidably mounted on two guide rails (31). The first arc-shaped plate (321) and the second arc-shaped plate (322) are connected between the two baffles (324). The first arc-shaped plate (321) is away from the filter plate (13), and the second arc-shaped plate (322) is close to the filter plate (13). The sliding plate (323) is also an arc-shaped plate, with sliding rods (3231) at both ends. The baffle (324) has arc-shaped sliding holes (3241) for the sliding rods (3231) to pass through. 23) The sliding plate (3231) is slidably disposed between two baffles (324); when the sliding plate (323) slides to the point where one end abuts against the first arc plate (321) and the other end overlaps with the second arc plate (322), a closed space in the shape of a hollow semi-cylindrical shape with the opening facing downward is formed between the first arc plate (321), the second arc plate (322), the sliding plate (323) and the two baffles (324); the baffle (324) is connected to the brush plate (14); a retaining member (5) is provided on the baffle (324), and the retaining member (5) makes the sliding plate (323) always have a tendency to move toward the first arc plate (321); the rotating shaft (12) is also provided with a toggle member (6) for driving the sliding plate (323) to move away from the first arc plate (321); The actuating component (6) includes a lever (61) and a cylinder (62). The lever (61) is rotatably mounted on the rotating shaft (12) and located above the filter plate (13). The lower end of the lever (61) extends away from the rotating shaft (12). The cylinder (62) is hinged on the rotating shaft (12) and located at the upper end of the lever (61). The piston rod end of the cylinder (62) is hinged to the upper end of the lever (61).

2. The printing solvent harmless recovery system according to claim 1, characterized in that: The drive mechanism (2) includes a drive motor (21), and a bracket (22) is provided on the top of the processing box (1). The drive motor (21) is mounted on the bracket (22), and the output shaft of the drive motor (21) extends vertically downward and is fixedly connected to the rotating shaft (12) on the same axis.

3. The printing solvent harmless recovery system according to claim 1, characterized in that: The retainer (5) includes a tension spring (51), one end of which is connected to the sliding rod (3231) and the other end is connected to the side of the baffle (324) opposite to the first arc plate (321).

4. The printing solvent harmless recovery system according to claim 1, characterized in that: The slag collection plate (4) is provided with a scraper (41) and a cleaning component (42). The cleaning component (42) is connected to the scraper (41) and is used to drive the scraper (41) to move along the slag collection plate (4).

5. The printing solvent harmless recovery system according to claim 4, characterized in that: The cleaning component (42) includes a waterproof motor (421), a lead screw (422), and a guide rod (423). The lead screw (422) and the guide rod (423) are both mounted on the slag collection plate (4). The scraper (41) is threaded onto the lead screw (422), and the guide rod (423) passes through the scraper (41). The waterproof motor (421) is mounted on the slag collection plate (4), and the output shaft of the waterproof motor (421) is coaxially and fixedly connected to the lead screw (422).

6. The printing solvent harmless recovery system according to claim 5, characterized in that: Both the slag collection plate (4) and the scraper (41) are made of mesh.

7. The printing solvent harmless recovery system according to claim 1, characterized in that: A collection box (15) is provided outside the processing box (1).

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