Aluminum foil wastewater resourceful treatment system and method

Abstract

The invention discloses an aluminum foil wastewater resourceful treatment system and method, and belongs to the field of wastewater treatment.The aluminum foil wastewater resourceful treatment system comprises a wastewater collecting pool, pretreatment equipment, an ultrafiltration system, a nanofiltration system, a neutralization reaction pool, a filter, a washer, a dryer and a calcining furnace which are sequentially arranged in the treatment direction; a produced water outlet of the nanofiltration system is communicated with the recycling pool, the pretreatment equipment comprises a box body, a stirring assembly, an air pump, a first hose, a dosing pump and a second hose, the stirring end of the stirring assembly is located in the box body, the air outlet end of the air pump is fixedly communicated with the first hose, and the air outlet end of the first hose is located in the box body; the medicine outlet end of the medicine adding pump is fixedly communicated with a second hose, the medicine outlet end of the second hose is located in the box body, and the medicine inlet end of the medicine adding pump is communicated with an external medicine source. Resourceful treatment of the aluminum foil wastewater is achieved, hydrochloric acid and metal aluminum are recycled, and the quality of effluent can meet the environmental protection requirement.

Description

Technical Field

[0001] The invention belongs to the field of wastewater treatment, and in particular relates to a system and method for resource treatment of aluminum foil wastewater. Background Art

[0002] Aluminum foil has been widely used in many fields such as food packaging, electronics, medicine, and construction due to its excellent barrier properties, thermal conductivity, flexibility, and recyclability. With the growing demand for aluminum foil in various industries, the scale of aluminum foil production is expanding. However, the production process of aluminum foil will generate a large amount of wastewater. If it is not effectively treated and recycled, it will not only cause serious environmental pollution, but also lead to a huge waste of resources.

[0003] The composition of aluminum foil wastewater is complex, and the main pollutants include hydrochloric acid, metallic aluminum (in the form of aluminum ions), suspended solids, grease and other organic impurities. The presence of these pollutants makes aluminum foil wastewater highly acidic and has a high chemical oxygen demand (COD). If it is directly discharged, it will cause serious harm to the water ecological environment, soil and groundwater.

[0004] In the traditional aluminum foil wastewater treatment method, the hydrochloric acid and aluminum metal resources in the wastewater are not effectively recycled, resulting in a waste of resources. In addition, traditional treatment methods often fail to completely remove organic impurities in the wastewater, resulting in the effluent quality being unable to meet increasingly stringent environmental protection requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a system and method for resource recovery treatment of aluminum foil wastewater to overcome at least one of the above-mentioned defects in the prior art.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The aluminum foil wastewater resource treatment system provided by the present invention comprises a wastewater collection pool, a pretreatment device, an ultrafiltration system, a nanofiltration system, a neutralization reaction pool, a filter, a scrubber, a dryer, and a calcining furnace which are sequentially arranged along a treatment direction; a water production outlet of the nanofiltration system is connected to a recovery pool; the pretreatment device comprises a box body, a stirring component, an air pump, a first hose, a dosing pump, and a second hose; an air pump, a stirring component, and a dosing pump are sequentially fixed on the top of the box body from left to right; a stirring end of the stirring component is located inside the box body; an air outlet end of the air pump is fixedly connected to the first hose; the air outlet end of the first hose is located inside the box body; a drug outlet end of the dosing pump is fixedly connected to the second hose; the drug outlet end of the second hose is located inside the box body; and a drug inlet end of the dosing pump is connected to an external drug source.

[0008] Preferably, it also includes a first slide rail, a first slider, a first vertical tube, a first hollow annular seat, a second vertical tube, and a second hollow annular seat, the left and right side walls of the upper part of the box body are fixed with the first slide rail, the inner side of the first slide rail is slidably connected with the first slider, the inner side of the first slider is fixed with the first vertical tube, the bottom end of the first vertical tube is fixedly connected with the first hollow annular seat, the top end of the first vertical tube located on the left side is fixedly connected with the bottom end of the first hose, the top end of the first vertical tube located on the right side is fixedly connected with the bottom end of the second hose, the left and right sides of the bottom wall of the first hollow annular seat are fixedly connected with the second vertical tube, the bottom end of the second vertical tube is fixedly connected with the second hollow annular seat, the inner and outer side walls of the first hollow annular seat have a plurality of first through holes connected with its inner cavity, and the inner and outer side walls of the second hollow annular seat have a plurality of second through holes connected with its inner cavity.

[0009] Preferably, the stirring assembly includes a motor, a stirring shaft, and a first stirring blade. The motor is fixed to the top of the box, the stirring shaft is fixed to the bottom of the motor, and the stirring shaft extends to the inside of the box and is fixed with the first stirring blade.

[0010] Preferably, it also includes a sealing box, a first bearing seat, a first bevel gear, a second bearing seat, a second bevel gear, a rotating shaft, and a cam. The sealing box is fixed to the rear side wall of the box body, the first bearing seat is fixed to the top wall of the sealing box, the stirring shaft passes through the top wall of the sealing box and the first bearing seat, and the first bevel gear is fixed in the sealing box, the second bearing seats are fixed to the left and right side walls of the sealing box, the second bevel gear is fixed to the inner end of the rotating shaft, the second bevel gear is meshed with the first bevel gear, the outer end of the rotating shaft passes through the second bearing seat and the side wall of the sealing box, and extends to the outside of the sealing box where a cam is fixed, the cam contacts the bottom wall of the first hollow annular seat, and the stirring shaft and the sealing box, as well as the rotating shaft and the sealing box are sealed.

[0011] Preferably, two stirring plates are fixed to the inner side wall of the cam, and the two stirring plates are respectively located on two opposite sides of the rotating shaft.

[0012] Preferably, it also includes a rotating table, a connecting rod, and a second stirring blade. The rotating table is fixed between the two left and right second vertical tubes. The rotating table has two rotating ends, each rotating end is hinged with a connecting rod, the bottom end of the stirring shaft passes through the bottom wall of the sealed box and extends to the bottom of the box body, the left and right sides of the bottom end of the stirring shaft are hinged with second stirring blades, and the outer end of the second stirring blade is hinged to the bottom end of the connecting rod.

[0013] Preferably, the rotating platform comprises an annular slide rail and two second sliders, the bottom of the annular slide rail is slidably connected to the two second sliders, and the top end of the connecting rod is hinged to the second sliders.

[0014] Preferably, the inner side wall of the first hollow annular seat is located outside the first stirring blade, and the inner side wall of the second hollow annular seat is located outside the second stirring blade.

[0015] Preferably, the plurality of first through holes are distributed at equal intervals along the circumference of the first hollow annular seat, and the plurality of second through holes are distributed at equal intervals along the circumference of the second hollow annular seat.

[0016] The present invention also provides a resource-based treatment method for aluminum foil wastewater, which adopts the above-mentioned aluminum foil wastewater resource-based treatment system for treatment, and comprises the following steps: sending the aluminum foil wastewater into a wastewater collection tank, after being homogenized and weighed in the wastewater collection tank, sending the wastewater into a pretreatment device for pretreatment, sending the pretreated supernatant into an ultrafiltration system for ultrafiltration treatment, sending the produced water obtained by the ultrafiltration treatment into a nanofiltration system for nanofiltration treatment, sending the produced water obtained by the nanofiltration treatment into a recovery tank to recover hydrochloric acid, sending the concentrated water obtained by the nanofiltration treatment into an electric neutralization reaction tank, adding alkali solution into the neutralization reaction tank for neutralization treatment to generate aluminum hydroxide precipitate, filtering, washing and drying the generated aluminum hydroxide precipitate, and then placing it into a calcining furnace for calcination to obtain metallic aluminum.

[0017] The beneficial effects of the present invention are:

[0018] 1. Realize resource treatment of aluminum foil wastewater, recycle hydrochloric acid and metallic aluminum, and the effluent quality can meet environmental protection requirements.

[0019] 2. Stirring and mixing are performed through the stirring component, and air can be sent into the box through the first hose by the air pump, which can increase the dissolved oxygen content in the water body, help maintain the hydrolysis and polymerization reactions of the coagulant, generate more and more stable active coagulant components, and thus improve the coagulation effect.

[0020] 3. On the one hand, the coagulant can be sent into the first hollow annular seat and the second hollow annular seat through the second hose by the dosing pump, and sprayed out through the first through hole and the second through hole for dispersing and dosing operations, so as to ensure that the coagulant can be quickly and evenly dispersed in the wastewater in the box. On the other hand, the air can be sent into the first hollow annular seat and the second hollow annular seat through the first hose by the air pump, and sprayed out through the first through hole and the second through hole to form bubbles in the water. The rising movement of the bubbles drives the flow of the surrounding water body, which can expand the scope of the stirring effect. For areas where the stirring effect of the stirring component is weak, the movement of the bubbles can promote the full mixing of the water body and the coagulant in these areas, ensure the uniformity of the water quality in the entire box, and create conditions for efficient coagulation reaction. When the bubbles rise in the water body, they will drive the surrounding suspended particles to move together, increasing the chance of collision between particles. This helps the formation and growth of flocs, so that small flocs gradually aggregate into larger and denser flocs, thereby improving the sedimentation performance of the flocs.

[0021] 4. Through the first hollow annular seat and the second hollow annular seat which are arranged in an upper and lower distribution, air and medicine are distributed from different positions, so that the air and medicine are dispersed more comprehensively and evenly, and the effect is better.

[0022] 5. The drug distribution and air distribution can be carried out simultaneously or separately. When carried out simultaneously, the drug will be mixed with the airflow in the first hollow annular seat and the second hollow annular seat before being sprayed out together, which not only improves the coagulation efficiency, but also enhances the coagulation effect and reduces the coagulation treatment time.

[0023] 6. The gas and drug distribution positions can be changed so that the gas and drugs enter the water body at different heights and positions, avoiding the problem of excessive concentration in a fixed area or insufficient distribution in a local area, promoting the uniform distribution of drugs and gas on the entire cross-section of the box, and increasing their contact area and contact efficiency with the water body. Conditions conducive to the formation of flocs can be created in different areas and heights.

[0024] 7. The up-and-down reciprocating motion of the first hollow annular seat and the second hollow annular seat will generate additional water flow disturbance in the water body, which will be superimposed on the water flow generated by the stirring component to form a more complex flow field.

[0025] 8. The rotation of the first stirring blade will cause the water to rotate in a plane, while the rotation of the stirring plate will cause the water to flow in a direction perpendicular to it. The combination of the two will form a complex three-dimensional flow field in the coagulation tank.

[0026] 9. The second stirring blade can rotate and swing at the same time. The rotation of the second stirring blade can make the coagulant disperse evenly in the horizontal direction, while the reciprocating swing up and down can push the agent to fully contact with the water in the vertical direction. The reciprocating swing of the second stirring blade up and down can produce complex water flow movement, prompting the formation of tiny eddies and turbulent areas in the water body, thereby accelerating the formation of flocs. And it can make the flocs constantly subjected to forces in different directions during the formation process, so that the internal structure of the flocs is more compact and stable.

[0027] 10. No additional driving force is required. Through the ingenious design linkage of the structure of the present application, only one motor is needed as the driving source to achieve the change of the air distribution and medicine distribution position during the stirring operation, forming a complex three-dimensional flow field and driving the second stirring blade to rotate and swing.

[0028] 11. The relative position relationship of the first hollow annular seat, the second hollow annular seat, the first stirring blade, and the second stirring blade, combined with the setting of the first through hole and the second through hole, can be purged to prevent flocs and impurities from adhering to and accumulating on the surface of the first stirring blade and the second stirring blade, keep it clean, and ensure normal operation. In addition, the air distribution and drug distribution positions are closer to the mainstream field area generated by the first stirring blade and the second stirring blade, and the air and drug are quickly dispersed to various parts of the water body, greatly improving the efficiency and uniformity of air distribution and drug distribution.

[0029] 12. Through the arrangement of the first through hole and the second through hole, the distribution of air and medicine is more uniform. The uniform distribution of air and medicine and the good mixing effect make the formed flocs more uniform and dense, and the sedimentation performance is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a system block diagram of the present invention.

[0031] Figure 2 It is a schematic diagram of the main structure of the pretreatment equipment of the present invention (first state).

[0032] Figure 3 It is a partial structural schematic diagram of the present invention.

[0033] Figure 4 It is a schematic cross-sectional structural diagram of the first vertical pipe, the first hollow annular seat, the second vertical pipe, and the second hollow annular seat of the present invention.

[0034] Figure 5 It is a side structural schematic diagram of the rotating shaft, cam, and stirring plate of the present invention.

[0035] Figure 6 It is a schematic diagram of the matching structure of the rotating table, the connecting rod, the second stirring blade, and the stirring shaft of the present invention.

[0036] Figure 7 It is a schematic diagram of the main structure of the pretreatment equipment of the present invention (second state).

[0037] The markings in the accompanying drawings are: 100-wastewater collection tank, 200-pretreatment equipment, 300-ultrafiltration system, 400-nanofiltration system, 500-recovery tank, 600-neutralization reaction tank, 700-filter, 800-scrubber, 900-dryer, 1000-calcining furnace, 1-box, 2-air pump, 3-stirring assembly, 4-first hose, 5-dosing pump, 6-second hose, 7-first slide rail, 8-first slider, 9-first vertical pipe, 10-first hollow ring shaped seat, 11-second vertical tube, 12-second hollow annular seat, 13-first through hole, 14-second through hole, 31-motor, 32-stirring shaft, 33-first stirring blade, 15-sealing box, 16-first bearing seat, 17-first bevel gear, 18-second bearing seat, 19-second bevel gear, 20-rotating shaft, 21-cam, 22-stirring plate, 23-rotating table, 24-connecting rod, 25-second stirring blade, 231-annular slide rail, 232-second slider. DETAILED DESCRIPTION

[0038] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0039] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] like Figures 1 to 7As shown, the aluminum foil wastewater resource treatment system provided in this embodiment includes a wastewater collection tank 100, a pretreatment device 200, an ultrafiltration system 300, a nanofiltration system 400, a neutralization reaction tank 600, a filter 700, a scrubber 800, a dryer 900, and a calcining furnace 1000 arranged in sequence along the treatment direction, the water output outlet of the nanofiltration system 400 is connected to the recovery tank 500, the pretreatment device 200 includes a box 1, a stirring component 3, an air pump 2, a first hose 4, a dosing pump 5, and a second hose 6, the top of the box 1 is fixed with the air pump 2, the stirring component 3, and the dosing pump 5 from left to right, the stirring end of the stirring component 3 is located inside the box 1, the air outlet end of the air pump 2 is fixedly connected to the first hose 4, the air outlet end of the first hose 4 is located inside the box 1, the drug outlet end of the dosing pump 5 is fixedly connected to the second hose 6, the drug outlet end of the second hose 6 is located inside the box 1, and the drug inlet end of the dosing pump 5 is connected to an external drug source.

[0041] This embodiment also provides a method for recycling aluminum foil wastewater, which uses the above-mentioned aluminum foil wastewater recycling treatment system for treatment, and includes the following steps:

[0042] Aluminum foil wastewater (mainly containing 1% HCL and 6% aluminum chloride) is sent to the wastewater collection pool 100. After being homogenized and equalized in the wastewater collection pool 100 for a period of time, it is sent to the pretreatment equipment 200, and a coagulant is added for pretreatment, so that the colloids, fine suspended matter and other impurities in the wastewater are condensed into larger particles for precipitation and removal. The pretreated supernatant is sent to the ultrafiltration system 300 for ultrafiltration treatment. Since the pretreatment is carried out before the ultrafiltration treatment, most of the colloids, fine suspended matter and other impurities are removed, and the number of impurities entering the ultrafiltration system 300 is reduced, thereby reducing the risk of ultrafiltration membrane contamination, extending the service life of the ultrafiltration membrane, and reducing the frequency of membrane cleaning and replacement. After pretreatment, most of the suspended and partially soluble pollutants in the wastewater are removed, and then enter the ultrafiltration system 300 for further filtration, so that the ultrafiltration system 300 can effectively intercept the remaining suspended matter, colloids, macromolecular organic matter, etc., thereby ensuring the water quality of ultrafiltration water. The produced water obtained by ultrafiltration treatment is sent to the nanofiltration system 400 for nanofiltration treatment. Under the driving force of the pressure difference, the divalent and multivalent ions in the wastewater are intercepted, so that the main thing that passes through the nanofiltration membrane is hydrochloric acid, thereby achieving the separation and purification of hydrochloric acid. The produced water obtained by nanofiltration treatment is sent to the recovery tank 500 to recover the hydrochloric acid for reuse in the workshop. Since the divalent and multivalent ions are all intercepted to the concentrated water side of the nanofiltration system 400, the concentrated water is mainly a concentrated solution of aluminum chloride. The small molecular organic matter in the wastewater is removed by the nanofiltration system 400, and the organic impurities in the wastewater are completely removed in cooperation with the ultrafiltration system 300. The concentrated water obtained by nanofiltration treatment is sent to the electric neutralization reaction tank 600, and sodium hydroxide solution is added to the neutralization reaction tank 600 for neutralization treatment to generate aluminum hydroxide precipitate. After filtering, washing and drying the generated aluminum hydroxide precipitate, it is placed in the calcining furnace 1000 for calcination to obtain metallic aluminum. In this way, the resource treatment of aluminum foil wastewater is achieved, hydrochloric acid and metallic aluminum are recovered, and the effluent quality can meet environmental protection requirements.

[0043] The stirring and mixing is performed by the stirring assembly 3, and air can be introduced into the box 1 through the air pump 2 via the first hose 4, which can increase the dissolved oxygen content in the water body, help maintain the hydrolysis and polymerization reactions of the coagulant, generate more and more stable active coagulant components, and thus improve the coagulation effect.

[0044] Wherein, it also includes a first slide rail 7, a first slider 8, a first vertical tube 9, a first hollow annular seat 10, a second vertical tube 11, and a second hollow annular seat 12. The left and right side walls of the upper inner part of the box body 1 are fixed with the first slide rail 7, the inner side of the first slide rail 7 is slidably connected with the first slider 8, the inner side of the first slider 8 is fixed with the first vertical tube 9, the bottom end of the first vertical tube 9 is fixedly connected with the first hollow annular seat 10, the top of the first vertical tube 9 on the left side is fixedly connected with the bottom end of the first hose 4, the top of the first vertical tube 9 on the right side is fixedly connected with the bottom end of the second hose 6, the left and right sides of the bottom wall of the first hollow annular seat 10 are fixedly connected with the second vertical tube 11, the bottom end of the second vertical tube 11 is fixedly connected with the second hollow annular seat 12, the inner and outer side walls of the first hollow annular seat 10 are provided with a plurality of first through holes 13 connected with the inner cavity thereof, and the inner and outer side walls of the second hollow annular seat 12 are provided with a plurality of second through holes 14 connected with the inner cavity thereof.

[0045] On the one hand, the coagulant can be sent into the first hollow annular seat 10 and the second hollow annular seat 12 through the second hose 6 by the dosing pump 5, and sprayed out through the first through hole 13 and the second through hole 14 for dispersing and dosing operations, so as to ensure that the coagulant can be quickly and evenly dispersed in the wastewater in the box 1. On the other hand, air can be sent into the first hollow annular seat 10 and the second hollow annular seat 12 through the first hose 4 by the air pump 2, and sprayed out through the first through hole 13 and the second through hole 14 to form bubbles in the water. The rising movement of the bubbles drives the flow of the surrounding water body, which can expand the scope of the stirring effect. For areas where the stirring effect of the stirring component 3 is weak, the movement of the bubbles can promote the full mixing of the water body and the coagulant in these areas, ensure the uniformity of the water quality in the entire box 1, and create conditions for efficient coagulation reaction. When the bubbles rise in the water body, they will drive the surrounding suspended particles to move together, increasing the chance of collision between particles. This helps the formation and growth of flocs, so that small flocs gradually aggregate into larger and denser flocs, thereby improving the sedimentation performance of the flocs. And by distributing the first hollow annular seat 10 and the second hollow annular seat 12 in an upper and lower distribution, air and medicine are distributed from different positions, so that the air and medicine are dispersed more comprehensively and evenly, and the effect is better. Medicine distribution and air distribution can be carried out simultaneously or separately. When carried out simultaneously, the medicine will be mixed with the airflow in the first hollow annular seat 10 and the second hollow annular seat 12 before being sprayed out together, which not only improves the coagulation efficiency, but also enhances the coagulation effect and reduces the coagulation treatment time.

[0046] The stirring assembly 3 includes a motor 31, a stirring shaft 32, and a first stirring blade 33. The motor 31 is fixed to the top of the box 1, the stirring shaft 32 is fixed to the bottom of the motor 31, and the stirring shaft 32 extends to the inside of the box 1 and is fixed with the first stirring blade 33. The motor 31 rotates, driving the stirring shaft 32 to rotate, so that the first stirring blade 33 rotates. The rotating first stirring blade is combined with the air distribution and drug distribution of the first hollow annular seat 10 and the second hollow annular seat 12, which effectively improves the coagulation efficiency and coagulation effect.

[0047] Wherein, it also includes a sealing box 15, a first bearing seat 16, a first bevel gear 17, a second bearing seat 18, a second bevel gear 19, a rotating shaft 20, and a cam 21. The sealing box 15 is fixed to the rear side wall of the box body 1, and the first bearing seat 16 is fixed to the top wall of the sealing box 15. The stirring shaft 32 passes through the top wall of the sealing box 15 and the first bearing seat 16, and the first bevel gear 17 is fixed in the sealing box 15. The second bearing seat 18 is fixed to the left and right side walls of the sealing box 15. The second bevel gear 19 is fixed to the inner end of the rotating shaft 20, and the second bevel gear 19 is meshed with the first bevel gear 17. The outer end of the rotating shaft 20 passes through the second bearing seat 18 and the side wall of the sealing box 15, and extends to the outside of the sealing box 15 where a cam 21 is fixed, and the cam 21 contacts the bottom wall of the first hollow annular seat 10. The stirring shaft 32 and the sealing box 15, as well as the rotating shaft 20 and the sealing box 15 are sealed.

[0048] The stirring shaft 32 rotates, driving the first bevel gear 17 to rotate, causing the second bevel gear 19 to rotate, driving the rotating shaft 20 to rotate, causing the cam 21 to rotate. During the rotation process, the cam 21 pushes the first hollow annular seat 10 to move up and down, causing the second hollow annular seat 12 to move up and down together, changing the gas distribution and drug distribution positions, so that the gas and the drug enter the water body at different heights and positions, avoiding the problem of excessive concentration in a fixed area or insufficient distribution in a local area, promoting the uniform distribution of the drug and gas on the cross section of the entire box 1, and improving their contact area and contact efficiency with the water body. The first hollow annular seat 10 and the second hollow annular seat 12 reciprocate up and down, which will generate additional water flow disturbances in the water body, which will overlap with the water flow generated by the stirring component 3 to form a more complex flow field. This complex flow field can increase the turbulence of the water body, make the mixing between the various parts of the water body more complete, promote the rapid and uniform mixing of the drug, gas and sewage, and strengthen the coagulation reaction. The stirring effect of the stirring component 3 may have certain limitations, and the stirring effect may be weak in some areas. The up and down movement of the first hollow annular seat 10 and the second hollow annular seat 12 can make up for this deficiency, expand the scope of air distribution and medicine distribution to the area where the stirring component 3 has a weaker effect, so that the water in the entire box 1 can be fully stirred and mixed, and the overall treatment effect can be improved. By changing the position of air distribution and medicine distribution, conditions conducive to the formation of flocs can be created in different areas and heights. The above-mentioned advantages in various aspects can accelerate the coagulation reaction speed, improve the formation and precipitation effect of flocs, thereby shortening the time of the entire coagulation process, improving the treatment efficiency, and treating more sewage per unit time, reducing the treatment cost. In addition, no additional driving force is required. Through the ingenious design linkage of the structure of the present application, only one motor 31 is needed as the driving source to realize the change of the air distribution and medicine distribution position while performing the stirring operation. The first slider 8 and the first slide rail 7 are set to ensure the stability of the lifting process of the first hollow annular seat 10 and the second hollow annular seat 12.

[0049] Among them, two stirring plates 22 are fixed on the inner side wall of the cam 21, and the two stirring plates 22 are respectively located on opposite sides of the rotating shaft 20. When the cam 21 rotates, the two stirring plates 22 are driven to rotate. The rotation of the first stirring blade 33 will cause the water body to generate a rotating flow in a plane; and the rotation of the stirring plate 22 will cause the water body to flow in a direction perpendicular to it. The combination of the two will form a complex three-dimensional flow field in the coagulation tank. This complex flow field can break the laminar flow state that may exist in the water body, so that the various parts of the water body will produce a stronger mixing, promote the full contact between the coagulant and the sewage, and improve the uniformity and efficiency of the mixing. Stirring in different directions will cause the suspended particles in the water to be acted upon by forces in different directions, increasing the collision frequency between the particles. More collision opportunities are conducive to the formation and growth of flocs, so that small flocs gradually aggregate into larger and denser flocs, thereby improving the flocculation effect.

[0050] The rotary table 23, a connecting rod 24, and a second stirring blade 25 are also included. The rotary table 23 is fixed between the left and right second vertical tubes 11. The rotary table 23 has two rotating ends, each of which is hinged with a connecting rod 24. The bottom end of the stirring shaft 32 passes through the bottom wall of the sealed box 15 and extends to the bottom of the box body 1. The left and right sides of the bottom end of the stirring shaft 32 are hinged with the second stirring blade 25. The outer end of the second stirring blade 25 is hinged with the bottom end of the connecting rod 24. The rotary table 23 includes an annular slide rail 231 and two second sliders 232. The bottom of the annular slide rail 231 is slidably connected to the two second sliders 232. The top end of the connecting rod 24 is hinged to the second slider 232.

[0051] In the initial state, the proximal end of the cam 21 contacts the bottom wall of the first hollow annular seat 10, the first stirring blade 33 is located above the first hollow annular seat 10, the stirring plate 22 is located below the first hollow annular seat 10, and the second stirring blade 25 is tilted downward, with one part located in the second hollow annular seat 12 and the other part located below the first hollow annular seat 10. In this way, stirring and mixing operations can be performed at different positions in the housing 1, and stirring and mixing are more comprehensive. During the stirring operation, the stirring shaft 32 drives the first stirring blade 33 and the second stirring blade 25 to rotate, and the first hollow annular seat 10 and its upper structure are pushed up and down by driving the cam 21, and the stirring plate 22 rotates following the cam 21. At the same time, due to the up and down movement of the second vertical pipe 11, the rotating table 23 is driven to move up and down, and the second stirring blade 25 is driven to swing back and forth up and down through the connecting rod 24. The rotation of the second stirring blade 25 can make the coagulant evenly dispersed in the horizontal direction, and the up and down reciprocating swing can push the agent to fully contact with the water body in the vertical direction. This breaks the concentration gradient that may exist in the vertical plane of the water body, allowing the coagulant to diffuse quickly and evenly throughout the water body, avoiding the phenomenon of excessively high or low local concentrations of the agent, and ensuring that the sewage and the coagulant can be fully mixed in the entire box 1, creating good conditions for the subsequent coagulation reaction. The second stirring blade 25 that swings back and forth up and down can produce complex water flow movements, prompting the formation of tiny eddies and turbulent areas in the water body. These tiny changes in water flow increase the frequency of collisions between particles, allowing the coagulant molecules to more fully contact and collide with the suspended particles in the water, thereby accelerating the formation of flocs. The stirring method of reciprocating up and down can cause the flocs to be continuously subjected to forces in different directions during the formation process, thereby making the internal structure of the flocs more compact and stable.

[0052] Among them, the inner side wall of the first hollow annular seat 10 is located on the outer side of the first stirring blade 33, and the inner side wall of the second hollow annular seat 12 is located on the outer side of the second stirring blade 25. Combined with the setting of the first through hole 13 and the second through hole 14, the first stirring blade 33 and the second stirring blade 25 can be purged, which can prevent flocs and impurities from adhering to and accumulating on the surface of the first stirring blade 33 and the second stirring blade 25, keep it clean, and ensure normal operation. And make the air distribution and medicine distribution position closer to the mainstream field area generated by the first stirring blade 33 and the second stirring blade 25, the air and medicine are quickly dispersed to various parts of the water body, greatly improving the efficiency and uniformity of air distribution and medicine distribution.

[0053] Among them, a plurality of first through holes 13 are evenly spaced along the circumference of the first hollow annular seat 10, and a plurality of second through holes 14 are evenly spaced along the circumference of the second hollow annular seat 12. The arrangement of the first through holes 13 and the second through holes 14 makes the air distribution and the medicine distribution more uniform, and the uniform air distribution, the medicine distribution and the good mixing effect make the formed flocs more uniform and dense, and the sedimentation performance is better.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Aluminum foil wastewater resource treatment system, characterized by: It includes a wastewater collection tank, a pretreatment device, an ultrafiltration system, a nanofiltration system, a neutralization reaction tank, a filter, a scrubber, a dryer, and a calcining furnace which are sequentially arranged along the treatment direction; The water output outlet of the nanofiltration system is connected to the recovery tank; The pretreatment equipment includes a box, a stirring assembly, an air pump, a first hose, a dosing pump, and a second hose; An air pump, a stirring assembly, and a dosing pump are fixed on the top of the box from left to right in sequence; The stirring end of the stirring assembly is located inside the box; The air outlet end of the air pump is fixedly connected to a first hose, and the air outlet end of the first hose is located inside the box; The drug outlet end of the drug dosing pump is fixedly connected to a second hose, the drug outlet end of the second hose is located inside the box, and the drug inlet end of the drug dosing pump is connected to an external drug source.

2. The aluminum foil wastewater resource treatment system according to claim 1 is characterized by: It also includes a first slide rail, a first slider, a first vertical tube, a first hollow annular seat, a second vertical tube, and a second hollow annular seat; The left and right side walls of the upper part of the box body are both fixed with first slide rails, and the inner side of the first slide rail is slidably connected with a first sliding block; A first vertical pipe is fixed to the inner side of the first sliding block, and a first hollow annular seat is fixedly connected to the bottom end of the first vertical pipe. The top end of the first vertical pipe on the left side is fixedly connected to the bottom end of the first hose, and the top end of the first vertical pipe on the right side is fixedly connected to the bottom end of the second hose. The left and right sides of the bottom wall of the first hollow annular seat are both fixedly connected with a second vertical pipe, and the bottom end of the second vertical pipe is fixedly connected with a second hollow annular seat; The inner and outer side walls of the first hollow annular seat both have a plurality of first through holes communicating with the inner cavity thereof; The inner and outer side walls of the second hollow annular seat both have a plurality of second through holes communicating with the inner cavity thereof.

3. The aluminum foil wastewater resource treatment system according to claim 2 is characterized by: The stirring assembly includes a motor, a stirring shaft, and a first stirring blade; A motor is fixed on the top of the box body, a stirring shaft is fixed on the bottom end of the motor, and a first stirring blade is fixed on the stirring shaft extending to the interior of the box body.

4. The aluminum foil wastewater resource treatment system according to claim 3 is characterized by: It also includes a sealing box, a first bearing seat, a first bevel gear, a second bearing seat, a second bevel gear, a rotating shaft, and a cam; A sealing box is fixed to the rear side wall of the box body; A first bearing seat is fixed on the top wall of the sealing box, the stirring shaft passes through the top wall of the sealing box and the first bearing seat, and a first bevel gear is fixed in the sealing box; The left and right side walls of the sealing box are both fixed with second bearing seats, the inner end of the rotating shaft is fixed with a second bevel gear, the second bevel gear is meshed with the first bevel gear, and the outer end of the rotating shaft passes through the second bearing seat and the side wall of the sealing box, and extends to the outside of the sealing box where a cam is fixed; The cam contacts the bottom wall of the first hollow annular seat; The stirring shaft and the sealing box, as well as the rotating shaft and the sealing box are all sealed.

5. The aluminum foil wastewater resource treatment system according to claim 4 is characterized by: Two stirring plates are fixed to the inner side wall of the cam; The two stirring plates are respectively located on two opposite sides of the rotating shaft.

6. The aluminum foil wastewater resource treatment system according to claim 5 is characterized by: Also includes a rotating table, a connecting rod, and a second stirring blade; The rotating platform is fixed between the left and right second vertical pipes; The rotating platform has two rotating ends, each of which is hinged with a connecting rod; The bottom end of the stirring shaft passes through the bottom wall of the sealing box and extends to the bottom of the box body; The left and right sides of the bottom end of the stirring shaft are both hinged with second stirring blades, and the outer ends of the second stirring blades are hinged with the bottom end of the connecting rod.

7. The aluminum foil wastewater resource treatment system according to claim 6 is characterized by: The rotating platform includes an annular slide rail and two second slide blocks; The bottom of the annular slide rail is slidably connected to two second slide blocks; The top end of the connecting rod is hinged to the second sliding block.

8. The aluminum foil wastewater resource treatment system according to claim 6 is characterized by: The inner side wall of the first hollow annular seat is located outside the first stirring blade; The inner side wall of the second hollow annular seat is located outside the second stirring blade.

9. The aluminum foil wastewater resource treatment system according to claim 2 is characterized by: A plurality of the first through holes are distributed equidistantly along the circumference of the first hollow annular seat; A plurality of the second through holes are distributed at equal intervals along the circumference of the second hollow annular seat.

10. A method for recycling aluminum foil wastewater, characterized in that: The aluminum foil wastewater resource treatment system according to any one of claims 1 to 9 is used for treatment, comprising the following steps: The aluminum foil wastewater is sent to the wastewater collection pool, and after being homogenized and weighed in the wastewater collection pool, it is sent to the pretreatment equipment for pretreatment. The supernatant after pretreatment is sent to the ultrafiltration system for ultrafiltration treatment, and the produced water obtained by the ultrafiltration treatment is sent to the nanofiltration system for nanofiltration treatment. The produced water obtained by the nanofiltration treatment is sent to the recovery pool to recover hydrochloric acid, and the concentrated water obtained by the nanofiltration treatment is sent to the electric neutralization reaction pool, and alkali solution is added to the neutralization reaction pool for neutralization treatment to generate aluminum hydroxide precipitate. After filtering, washing and drying the generated aluminum hydroxide precipitate, it is placed in a calcining furnace for calcination to obtain metallic aluminum.

Images