Wastewater treatment device for carton printing production

Abstract

The present invention relates to the technical field of ink wastewater treatment, specifically a wastewater treatment device for carton printing production, the treatment device includes a dispensing tank group, a metering pump group, a water tank, a temporary storage tank, a delivery pump, and a flocculation tank. The dispensing tank group, the metering pump group, the water tank, and the flocculation tank are connected in sequence through pipelines, and the temporary storage tank is also connected to the flocculation tank through a pipeline. A delivery pump is arranged between the flocculation tank and the water tank, and a delivery pump is also arranged between the flocculation tank and the temporary storage tank. Two outflow positions are also arranged on the flocculation tank to continuously output water and flocculated ink respectively. The stirring assembly includes a main shaft, an upper sleeve, a middle sleeve, an airfoil blade, a bottom sleeve, and an axial flow blade. The upper end of the main shaft is connected to a motor, and an upper sleeve and a middle sleeve are slidably arranged on the main shaft. The upper sleeve and the middle sleeve are circumferentially driven with the main shaft, and the airfoil blades are radially arranged on the outer surface of the middle sleeve, and the surface shape of the airfoil blades rotates under an upward force. A group of axial flow blades are arranged above and below the airfoil blades.

Description

Technical Field

[0001] The invention relates to the technical field of ink wastewater treatment, and specifically to a wastewater treatment device for carton printing production. Background Art

[0002] Cartons are widely used in the packaging industry, especially with the continuous development of express delivery and logistics. Goods need to be marked with information on the outer packaging cartons, and most cartons need to be printed. A large amount of wastewater is generated during the working process of the printing machine, which contains a large amount of ink and cannot be discharged directly, so it needs to be treated.

[0003] In the prior art, ink wastewater is generally treated by adding chemicals for flocculation and then standing for stratification. A large number of tanks are used, and different processes are generally not treated continuously. After staying in one process for a period of time, the wastewater in that stage is fully treated and then all emptied before the subsequent wastewater is introduced and a new cycle of treatment begins. This is inefficient. In addition, during the standing separation of the oily component and the water component, if the mixing degree of the agent and the surrounding medium is increased by stirring, the oil and water components are affected by physical agitation and cannot maintain efficient separation. If there is no stirring, the mixing reaction degree of the agent and the wastewater is affected. The flocculation process often consumes a lot of time in the stirring and standing stages, affecting the overall treatment progress. Summary of the invention

[0004] The object of the present invention is to provide a wastewater treatment device for carton printing production to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A wastewater treatment device for carton printing production, the treatment device comprises a dispensing tank group, a metering pump group, a water tank, a temporary storage tank, a delivery pump, and a flocculation tank. The dispensing tank group, the metering pump group, the water tank, and the flocculation tank are connected in sequence through pipelines, the temporary storage tank is also connected to the flocculation tank through a pipeline, a delivery pump is arranged between the flocculation tank and the water tank, and a delivery pump is also arranged between the flocculation tank and the temporary storage tank. Two outflow positions are also arranged on the flocculation tank to continuously output water and flocculated ink respectively.

[0007] Wastewater generated during the printing process continuously flows into the temporary storage tank, and the delivery pump continuously inputs it into the flocculation tank at a set flow rate. Water mixed with flocculants delivered from another route is also added to the flocculation tank. The dispensing tank group adjusts the dosing ratio, and the metering pump group adds it to the water tank at a precise flow rate. After the flocculant is mixed in the water tank, it is continuously added to the flocculation tank through the delivery pump for mixing and flocculation. The oily component in the ink wastewater is separated from the water component, and the flocculation tank output port continuously outputs the clean water component and the oily component to complete the core treatment. The subsequent treatment only requires standing or heating, etc., waiting for the trace water in the oily component to evaporate.

[0008] The flocculation tank includes a tank body, a motor, a stirring assembly, an outlet, and an oil suction port. The motor is arranged on the top of the tank body, and the stirring assembly is arranged downward from the motor. The stirring assembly is located in the tank body, the outlet is arranged at the bottom of the tank body, and the oil suction port with an extension pipe is arranged on the top of the tank body. The stirring assembly includes at least one component suspended at the oil-water stratification position.

[0009] The mixed materials in the tank body begin to stratify. The stirring component stirs the liquid material to promote the combination of the original wastewater components and the flocculant to produce oily floccules. The stirring range of the upper parts of the stirring component needs to be limited to the two layers after stratification. A certain boundary is set at the stratification position to promote significant stratification of the two layers of liquid. Clean water flows out of the outlet at the bottom of the tank body, and the oil suction port sucks away the upper oily substances. At the same time, the tank body continuously enters new water to be treated, achieving flow balance.

[0010] The stirring assembly includes a main shaft, an upper sleeve, a middle sleeve, airfoil blades, a bottom sleeve, and axial flow blades. The upper end of the main shaft is connected to a motor. The upper sleeve and the middle sleeve are slidably arranged on the main shaft. The upper sleeve, the middle sleeve and the main shaft are in circular transmission. The airfoil blades are radially arranged on the outer surface of the middle sleeve. The surface shape of the airfoil blades rotates under an upward force. The bottom sleeve is fixedly arranged at the bottom end of the main shaft. A group of axial flow blades are arranged between the bottom sleeve and the middle sleeve, and a group of axial flow blades are also arranged between the upper sleeve and the middle sleeve.

[0011] The main shaft obtains the rotation speed from the motor. The upper sleeve, middle sleeve, airfoil blades, bottom sleeve and axial flow blades arranged on the main shaft rotate together. During the rotation, the airfoil blades are subjected to an upward force. There is a certain difference in the density of oil and water. The buoyancy difference caused by the density difference alone is small, and it is not easy for the airfoil blades to accurately float and stay at the oil-water boundary. The airfoil blades have a specific lift shape. During the rotation process, they are also subjected to the lift generated by the pressure difference between the upper and lower surfaces of the fluid. The airfoil blades are subjected to the combined force of the liquid buoyancy and the lift, which is balanced with the gravity. , hovering at the oil-water boundary. According to the airfoil shape and forward speed, even a small difference in oil-water density can produce a large lift difference, allowing the airfoil blades to quickly float to the upper part of the water layer and unable to rise further into the oil layer. Therefore, the plane where the airfoil blades are located is a clear oil-water interface. Afterwards, two groups of axial flow blades respectively arranged above and below the airfoil blades exert force for liquid circulation within the local range of the two layers of liquid, allowing the water in the oil layer to quickly sink to the interface and enter the water layer, allowing the oily components in the water layer to quickly float up and enter the oil layer.

[0012] The stirring assembly also includes a plurality of connecting rods, one end of each connecting rod is hinged at the root of the axial flow blade, and the other end of the connecting rod is hinged to one of the upper sleeve, the middle sleeve, and the bottom sleeve. The hinge axes at both ends of the connecting rod are perpendicular to the main shaft axis, and the material density of the upper sleeve is less than the density of the oily component produced by flocculation.

[0013] The axial flow blades are installed at the end of the connecting rod, and circular motion is transmitted through the connecting rod. When the connecting rod is driven, the axial position of the main shaft can be adjusted. When the oily components in the wastewater to be treated increase, the position of the oil-water boundary layer changes. Although the airfoil blades can adjust their own height positions accordingly, if the height position of the axial flow blades is not adjusted, local fluid disturbances that are very strong away from the boundary layer are likely to occur, affecting the stability of the boundary layer. The present application adds a connecting rod structure, and the upper sleeve stays at the upper liquid surface of the oil layer through buoyancy, the middle sleeve stays at the oil-water boundary layer position, and the bottom sleeve is fixed at the bottom of the main shaft. The lengths of the connecting rods set between the sleeves are equal, and the connecting rods adaptively rotate to adjust the height position of the axial flow blades. During the adjustment process, since the lengths of the connecting rods are equal, the axial flow blades in the oil layer will change in height to the middle height of the oil layer, and the axial flow blades in the water layer will be adjusted to the middle position of the water layer, and the surrounding liquid will be circulated and pumped at the new position.

[0014] The axial flow blade is arranged at an end of the connecting rod away from the main shaft.

[0015] When the upper sleeve and the middle sleeve are close to each other, the axial flow blades in the oil layer are adjusted to rotate at a radial position far from the main shaft, that is, the axial flow blades are set to a radius farther from the main shaft through a connecting rod to pump the surrounding liquid. The airfoil blades can first fully cover the position of the larger radius, and the airfoil blades have a larger rotational linear velocity at the larger radius, and the lift difference in the two media is larger. Therefore, the airfoil blades are closer to the ideal plane of the oil-water boundary layer at the larger radius. The medium pumped by the axial flow blades at the larger radius will be blocked by the airfoil blades, reducing the amount of disturbance passing through the boundary layer. If the axial flow blades are set close to the main shaft, the airfoil blades cannot first cover the small radius position range where the middle sleeve is located, and the airfoil blades have a small linear velocity at this location, and the combined force of lift and buoyancy cannot balance the gravity. Therefore, there is a certain offset between the airfoil blades and the oil-water boundary layer plane at the small radius position, and the axial flow blades may be close to the interface.

[0016] The axial flow blades located between the upper shaft sleeve and the middle shaft sleeve are blown in a direction from top to bottom, and the axial flow blades located between the middle shaft sleeve and the bottom shaft sleeve are blown in a direction from bottom to top.

[0017] The setting angle of the axial flow blade during operation determines the circulation direction of the surrounding liquid. When setting the direction in this application, the liquid is allowed to "hit" the direction of the airfoil blade, allowing the water component in the oil layer to move to the interface faster, and vice versa.

[0018] A keyway is arranged on the surface of the main shaft, and the keyway axially extends to the bottom end of the main shaft. Inward protrusions engaging with the keyway are arranged on the inner surfaces of the upper shaft sleeve, the middle shaft sleeve and the bottom shaft sleeve respectively.

[0019] The keyway is driven without affecting the axial sliding of the upper sleeve and the middle sleeve. During assembly, all components on the main shaft are installed from the bottom to the top, and the bottom of the main shaft is fixed with nuts and other components.

[0020] A jacket layer is also provided on the outer surface of the tank body, and cooling water is passed into the jacket layer.

[0021] High-concentration ink wastewater generates heat during the flocculation reaction. If it is not removed in time, it will affect the working conditions of the flocculation tank to treat subsequent wastewater.

[0022] A flow sensor is arranged on the pipeline from the temporary storage tank to the delivery pump, and a regulating valve is arranged on the pipelines of the outlet and the oil suction port. The flow sensor is connected with the metering pump group and the regulating valve signal.

[0023] Adjust the treatment flow rate and adjust the balance between the amount of wastewater entering and leaving the flocculation tank, the amount of flocculant added, and the product outflow rate within the upper limit of the flow rate.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention realizes flow balance at the flocculation tank by continuously adjusting the amount of reagent added and mixing it with the wastewater to be treated, and continuously treats the wastewater without step-by-step treatment and controlling the shutdown cooperation of the machine. The stirring assembly arranged in the flocculation tank can promote flocculation flow in a local range without affecting the oil-water boundary. The airfoil blades increase the vertical force caused by density with the help of the lift structure, and accurately stay at the oil-water interface, providing a basis for adjusting the position of the axial flow blades. After the upper and middle sleeves of the axial flow blades accurately stay at the upper and lower liquid levels of the oil layer, the height is adjusted to the two middle heights of the oil layer and the water layer, while trying not to disturb the oil-water interface, promoting the circulation of surrounding components and promoting further oil-water separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0027] Figure 2 The cross-sectional structure of the flocculation tank of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 The cross-sectional structure of the flocculation tank of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 4 It is a structural schematic diagram of the stirring assembly of the present invention;

[0030] Figure 5 yes Figure 4A partial enlarged view in FIG.

[0031] Figure 6 It is a schematic diagram of the force on the airfoil blade of the present invention at the oil-water interface;

[0032] In the figure: 1, dispensing tank group; 2, metering pump group; 3, water tank; 4, temporary storage tank; 5, delivery pump; 6, flocculation tank; 61, tank body; 62, jacket layer; 63, motor; 64, stirring assembly; 641, main shaft; 6411, keyway; 642, upper sleeve; 643, middle sleeve; 644, airfoil blade; 645, bottom sleeve; 646, axial flow blade; 647, connecting rod; 65, outlet; 66, oil suction port. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides a technical solution:

[0035] A wastewater treatment device for carton printing production, the treatment device comprises a dispensing tank group 1, a metering pump group 2, a water tank 3, a temporary storage tank 4, a delivery pump 5, and a flocculation tank 6. The dispensing tank group 1, the metering pump group 2, the water tank 3, and the flocculation tank 6 are connected in sequence through pipelines, the temporary storage tank 4 is also connected to the flocculation tank 6 through a pipeline, a delivery pump 5 is arranged between the flocculation tank 6 and the water tank 3, a delivery pump 5 is also arranged between the flocculation tank 6 and the temporary storage tank 4, and two outflow positions are arranged on the flocculation tank 6 to continuously output water and flocculated ink respectively.

[0036] like Figure 1 As shown, the wastewater generated during the printing process continuously flows into the temporary storage tank 4, and the delivery pump 5 continuously inputs it into the flocculation tank 6 at a set flow rate. Water mixed with flocculant delivered from another route is also added to the flocculation tank 6, and the drug dispensing tank group 1 adjusts the dosing ratio. The metering pump group 2 adds it to the water tank 3 at a precise flow rate. After the flocculant is mixed in the water tank 3, it is continuously added to the flocculation tank 6 through the delivery pump for mixing and flocculation. The oily component in the ink wastewater is separated from the water component, and the output port of the flocculation tank 6 continuously outputs the clean water component and the oily component to complete the core treatment. The subsequent treatment only needs to be allowed to stand or heat, etc., waiting for the trace water in the oily component to evaporate.

[0037] The flocculation tank 6 includes a tank body 61, a motor 63, a stirring assembly 64, an outlet 65, and an oil suction port 66. The motor 63 is arranged on the top of the tank body 61, and the stirring assembly 64 is arranged downward from the motor 63. The stirring assembly 64 is located in the tank body 61. The outlet 65 is arranged at the bottom of the tank body 61, and the oil suction port 66 with an extension pipe is arranged on the top of the tank body 61. The stirring assembly 64 includes at least one component suspended at the oil-water stratification position.

[0038] like Figure 2 , 3 As shown, the mixed materials in the tank body 61 begin to stratify, and the stirring component 64 stirs the liquid material to promote the combination of the original wastewater components and the flocculant and produce oily floccules. The stirring range of the upper part of the stirring component 64 needs to be limited to the two-layer area after stratification. A certain boundary is set at the stratification position to promote significant stratification of the two layers of liquid. The outlet 65 at the bottom of the tank body 61 flows out clean water, and the oil suction port 66 sucks away the upper oily substances. At the same time, the tank body 61 continuously enters a new water body to be treated, and the flow rate is balanced.

[0039] The stirring assembly 64 includes a main shaft 641, an upper sleeve 642, a middle sleeve 643, an airfoil blade 644, a bottom sleeve 645, and an axial flow blade 646. The upper end of the main shaft 641 is connected to the motor 63. The upper sleeve 642 and the middle sleeve 643 are slidably arranged on the main shaft 641. The upper sleeve 642, the middle sleeve 643 and the main shaft 641 are in circular transmission. The airfoil blade 644 is radially arranged on the outer surface of the middle sleeve 643. The surface shape of the airfoil blade 644 rotates under the upward force. The bottom sleeve 645 is fixedly arranged at the bottom end of the main shaft 641. A group of axial flow blades 646 are arranged between the bottom sleeve 645 and the middle sleeve 643. A group of axial flow blades 646 are also arranged between the upper sleeve 642 and the middle sleeve 643.

[0040] like Figure 2 , 4 As shown, the main shaft 641 obtains the rotation speed from the motor 63, and the upper sleeve 642, the middle sleeve 643, the airfoil blade 644, the bottom sleeve 645, and the axial flow blade 646 arranged on the main shaft 641 rotate together. During the rotation process, the airfoil blade 644 is subjected to an upward force. There is a certain difference in density between oil and water. The buoyancy difference caused by the density difference alone is small, and it is not easy for the airfoil blade 644 to accurately float and stay at the oil-water boundary position. The airfoil blade 644 has a specific lift shape, and during the rotation process, it is also subjected to the lift generated by the pressure difference of the upper and lower surface fluids, as shown in FIG. Figure 6As shown, the airfoil blade 644 is subjected to the combined force F of the liquid buoyancy and the lift, which is balanced with the gravity G, and hovers at the oil-water boundary. According to the airfoil shape and the forward speed, even a small difference in oil-water density can produce a large lift difference, allowing the airfoil blade 644 to quickly float to the upper part of the water layer and unable to rise further into the oil layer. Therefore, the plane where the airfoil blade 644 is located is a clear oil-water interface. Afterwards, the two groups of axial flow blades respectively arranged above and below the airfoil blade 644 apply force for liquid circulation within the local range of the two layers of liquid, allowing the water in the oil layer to quickly sink to the interface and enter the water layer, and allowing the oily components in the water layer to quickly float up and enter the oil layer.

[0041] The stirring assembly 64 also includes a plurality of connecting rods 647, one end of each connecting rod 647 is hinged to the root of the axial flow blade 646, and the other end of the connecting rod 647 is hinged to one of the upper sleeve 642, the middle sleeve 643, and the bottom sleeve 645. The hinge axes at both ends of the connecting rod 647 are perpendicular to the axis of the main shaft 641, and the material density of the upper sleeve 642 is less than the density of the oily component produced by flocculation.

[0042] like Figures 2~5 As shown, the axial flow blade 646 is installed at the end of the connecting rod 647, and the circular motion is transmitted through the connecting rod 647. When the connecting rod 647 is driven, the axial position of the main shaft 641 can be adjusted. When the oily components in the wastewater to be treated increase, the position of the oil-water boundary layer changes. Although the airfoil blade 644 can adjust its own height position accordingly, if the height position of the axial flow blade 646 is not adjusted, it is easy to cause a strong local fluid disturbance away from the boundary layer, affecting the stability of the boundary layer. The present application adds a connecting rod 647 structure, and the upper sleeve 642 It stays at the upper liquid surface of the oil layer through buoyancy, the middle sleeve 643 stays at the oil-water boundary layer, the bottom sleeve 645 is fixed at the bottom of the main shaft 641, and the connecting rods 647 arranged between the sleeves are of equal length. The connecting rods 647 adaptively rotate to adjust the height position of the axial flow blades 646. During the adjustment process, since the connecting rods 647 are of equal length, the axial flow blades 646 in the oil layer will change in height to the middle height of the oil layer, and the axial flow blades 646 in the water layer will be adjusted to the middle position of the water layer, and the surrounding liquid will be circulated and pumped at the new position.

[0043] The axial flow blade 646 is disposed at an end of the connecting rod 647 away from the main shaft 641 .

[0044] like Figure 2 , 3As shown in Figure 4, when the upper sleeve 642 and the middle sleeve 643 are close to each other, the axial flow blades 646 in the oil layer are adjusted to a radial position farther from the main shaft 641 for rotation, that is, the axial flow blades 646 are set to a radius farther from the main shaft 641 through the connecting rod 647 to pump the surrounding liquid, and the airfoil blades 644 can first fully cover the position of the larger radius, and the airfoil blades 644 have a larger rotational linear velocity at the larger radius, and the lift difference between the two media is larger. Therefore, the airfoil blades 644 are closer to the ideal plane of the oil-water boundary layer at the larger radius, and the medium pumped by the axial flow blades 646 at the larger radius will be blocked by the airfoil blades 644, reducing the disturbance amount passing through the boundary layer. If the axial flow blade 646 is set close to the main shaft 641, the airfoil blade 644 cannot cover the small radius position range where the middle shaft sleeve 643 is located, and the linear velocity of the airfoil blade 644 at this position is relatively small, and the combined force of lift and buoyancy cannot balance the gravity. Therefore, there is a certain offset between the airfoil blade 644 and the oil-water boundary layer plane at the small radius position, and the axial flow blade 646 may be close to the boundary surface.

[0045] The axial flow blades 646 located between the upper shaft sleeve 642 and the middle shaft sleeve 643 are blown in a direction from top to bottom, and the axial flow blades 646 located between the middle shaft sleeve 643 and the bottom shaft sleeve 645 are blown in a direction from bottom to top.

[0046] like Figure 2 , 3 As shown, the setting angle of the axial flow blade 646 during operation determines the circulation direction of the surrounding liquid. The present application sets the direction so that the liquid "collides" with the airfoil blade 644, allowing the water component in the oil layer to move to the interface faster, and vice versa.

[0047] A keyway 6411 is arranged on the surface of the main shaft 641 , and the keyway 6411 axially extends to the bottom end of the main shaft 641 . Inward protrusions engaging with the keyway 6411 are arranged on the inner surfaces of the upper sleeve 642 , the middle sleeve 643 , and the bottom sleeve 645 , respectively.

[0048] like Figure 4 , 5 As shown, the keyway 6411 transmits without affecting the axial sliding of the upper sleeve 642 and the middle sleeve 643. During assembly, all components on the main shaft 641 are installed from the bottom to the top, and the bottom of the main shaft 641 is fixed with the bottom sleeve 645 by nuts and other components.

[0049] A jacket layer 62 is also provided on the outer surface of the tank body 61 , and cooling water is passed into the jacket layer 62 .

[0050] The high-concentration ink wastewater generates heat during the flocculation reaction. If it is not removed in time, it will affect the working conditions of the flocculation tank 6 for treating the subsequent wastewater.

[0051] A flow sensor is arranged on the pipeline from the temporary storage tank 4 to the delivery pump 5, and a regulating valve is arranged on the pipelines of the outlet 65 and the oil suction port 66. The flow sensor is connected with the metering pump group 2 and the regulating valve signal.

[0052] The processing flow is adjusted to balance the wastewater volume in and out of the flocculation tank 6, the amount of flocculant added, and the product outflow within the upper flow limit.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wastewater treatment device for carton printing production, characterized in that: The treatment device comprises a dispensing tank group (1), a metering pump group (2), a water tank (3), a temporary storage tank (4), a delivery pump (5), and a flocculation tank (6); the dispensing tank group (1), the metering pump group (2), the water tank (3), and the flocculation tank (6) are connected in sequence through pipelines; the temporary storage tank (4) is also connected to the flocculation tank (6) through a pipeline; a delivery pump (5) is arranged between the flocculation tank (6) and the water tank (3); a delivery pump (5) is also arranged between the flocculation tank (6) and the temporary storage tank (4); and two outflow positions are arranged on the flocculation tank (6) to respectively continuously output water and flocculated ink; The flocculation tank (6) comprises a tank body (61), a motor (63), a stirring assembly (64), an outlet (65), and an oil suction port (66); the motor (63) is arranged on the top of the tank body (61); the stirring assembly (64) is arranged downward from the motor (63); the stirring assembly (64) is located inside the tank body (61); the outlet (65) is arranged on the bottom of the tank body (61); the oil suction port (66) with an extension pipe is arranged on the top of the tank body (61); the stirring assembly (64) comprises at least one component suspended at the oil-water stratification position; The stirring assembly (64) comprises a main shaft (641), an upper shaft sleeve (642), a middle shaft sleeve (643), an airfoil blade (644), a bottom shaft sleeve (645), and an axial flow blade (646). The upper end of the main shaft (641) is connected to the motor (63). The upper shaft sleeve (642) and the middle shaft sleeve (643) are slidably arranged on the main shaft (641). The upper shaft sleeve (642), the middle shaft sleeve (643) and the main shaft (641) are in circular transmission. The airfoil blade (64 4) The airfoil blades (644) are radially arranged on the outer surface of the middle sleeve (643), have a lift shape, and are also subjected to lift generated by the pressure difference of the fluid on the upper and lower surfaces during rotation. The bottom sleeve (645) is fixedly arranged at the bottom end of the main shaft (641), a group of axial flow blades (646) are arranged between the bottom sleeve (645) and the middle sleeve (643), and a group of axial flow blades (646) are also arranged between the upper sleeve (642) and the middle sleeve (643); The stirring assembly (64) further comprises a plurality of connecting rods (647), one end of each connecting rod (647) being hinged to the root of the axial flow blade (646), and the other end of the connecting rod (647) being hinged to one of the upper shaft sleeve (642), the middle shaft sleeve (643), and the bottom shaft sleeve (645), the hinge axes at both ends of the connecting rod (647) being perpendicular to the axis of the main shaft (641), and the material density of the upper shaft sleeve (642) being less than the density of the oily component produced by flocculation.

2. A wastewater treatment device for carton printing production according to claim 1, characterized in that: The axial flow blade (646) is arranged at an end of the connecting rod (647) away from the main shaft (641).

3. A wastewater treatment device for carton printing production according to claim 2, characterized in that: The axial flow blades (646) located between the upper shaft sleeve (642) and the middle shaft sleeve (643) are blown in a direction from top to bottom, and the axial flow blades (646) located between the middle shaft sleeve (643) and the bottom shaft sleeve (645) are blown in a direction from bottom to top.

4. A wastewater treatment device for carton printing production according to claim 1, characterized in that: A keyway (6411) is provided on the surface of the main shaft (641), and the keyway (6411) extends axially to the bottom end of the main shaft (641). Inward protrusions engaging with the keyway (6411) are respectively provided on the inner surfaces of the upper shaft sleeve (642), the middle shaft sleeve (643), and the bottom shaft sleeve (645).

5. The wastewater treatment device for carton printing production according to claim 1 is characterized by: The outer surface of the tank body (61) is further provided with a jacket layer (62), and cooling water is passed into the jacket layer (62).

6. A wastewater treatment device for carton printing production according to claim 1, characterized in that: A flow sensor is provided on the pipeline from the temporary storage tank (4) to the delivery pump (5), and a regulating valve is provided on the pipelines of the outlet (65) and the oil suction port (66). The flow sensor is connected to the metering pump group (2) and the regulating valve signal.

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