Electric flocculation and ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero discharge device

Abstract

The invention discloses an electric flocculation and ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device, and relates to the technical field of papermaking wastewater treatment, the electric flocculation and ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device comprises a reaction box, an anode plate and a cathode plate which are arranged in the reaction box, a partition plate is fixedly connected in the reaction box, a water inlet pipe is fixedly connected to one side of the reaction box, and the electric flocculation and ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device further comprises an electrolysis mechanism, the electrolysis mechanism comprises a supporting strip fixed in the reaction box and a fixing strip located below the supporting strip, water in the reaction box is disturbed and guided by deflecting the anode plate and the cathode plate, the flow velocity balance of water flow is promoted, meanwhile, the water flow impacts the side wall of the reaction box to disturb the water flow close to the periphery of the side wall of the reaction box, and the water flow rate is increased. The purpose of balancing the flow velocity of water flow close to the side wall of the reaction box and the flow velocity of water flow in the middle of the reaction box is achieved, and the difference of the flow velocity of water flow in all positions in the reaction box is reduced, so that anode plates at different positions in the reaction box are uniformly consumed, an electric field is kept uniform, and suspended particles in water are uniformly condensed.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking wastewater treatment, and in particular to an electric flocculation ultrasonic assisted membrane dialysis integrated papermaking wastewater zero discharge device. Background Art

[0002] The papermaking industry is an industry that causes heavy environmental pollution. Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. In particular, the wastewater pollution generated by pulping is the most serious. The wastewater pollution problem has increasingly become a bottleneck restricting the development of papermaking enterprises. Therefore, it is crucial for the development of my country's papermaking enterprises to establish a new water resource utilization model, explore effective wastewater treatment and reuse comprehensive treatment technologies, and achieve zero discharge of papermaking wastewater.

[0003] At present, electrocoagulation and curtain-type MBR membranes are commonly used in the papermaking industry to treat sewage. Electrocoagulation is an electrochemical water treatment technology. Its core principle is based on electrolysis reaction. When electric current passes through an aqueous solution containing electrolytes, the metal ions produced by the anode and the hydroxide ions produced by the cathode will react in the water to form metal hydroxide precipitates, which adsorb pollutants such as colloids, suspended matter and heavy metal ions in the water to form flocs, thereby separating pollutants from water to achieve water purification. The curtain-type MBR membrane is mainly composed of membrane fibers and membrane component frames, which can filter sewage with high precision to achieve water purification.

[0004] In the process of purifying water by electrocoagulation, electrochemical corrosion will occur on the electrode plates during the electrocoagulation process, causing the anode metal to continuously dissolve. In the reaction box, there is friction between the wastewater and the box wall. The wastewater flow rate close to the box wall will be significantly lower than that in the middle of the reaction box. In addition, the uneven wastewater flow rate will cause different wastewater supply speeds on the anode metal surface at different positions, thereby causing differences in the reaction rates of the anode metal at different positions, resulting in uneven consumption of the anode metal, affecting the uniformity of the electric field inside the reaction box, making the coagulation effect of suspended particles in the water uneven, and reducing the overall electrocoagulation effect. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the uneven wastewater flow rate in the reaction box leads to different anode metal consumption rates at different positions, resulting in uneven electric field and reducing the electrocoagulation effect, and to propose an electrocoagulation ultrasonic assisted membrane dialysis integrated papermaking wastewater zero discharge device.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: an integrated papermaking wastewater zero-discharge device for electro-flocculation and ultrasonic-assisted membrane dialysis: comprising a reaction box and an anode plate and a cathode plate arranged inside the reaction box, a partition is fixedly connected inside the reaction box, and a water inlet pipe is fixedly connected to one side of the reaction box, and also includes:

[0007] An electrolysis mechanism, the electrolysis mechanism comprising a support bar fixed inside the reaction box and a fixing bar located below the support bar, a mounting frame being slidably connected to the support bar, a lower mounting plate being fixedly connected to the fixing bar, an upper mounting plate being slidably connected to the mounting frame, adjustment components being provided on both the upper mounting plate and the lower mounting plate, and a hydraulic rod fixed to a rack being fixedly mounted on the lower mounting plate;

[0008] The adjustment assembly includes a plurality of mounting sleeves rotatably connected to the upper mounting plate and the lower mounting plate, a gear 1 is fixedly connected to the rotating shaft of the mounting sleeve, a rack meshing with the gear 1 is slidably connected inside the upper mounting plate and the lower mounting plate, and the anode plate and the cathode plate are respectively fixed to the mounting sleeves and arranged alternately;

[0009] The extension and retraction of the hydraulic rod causes the rack to move and drive the gear to rotate, so that the mounting sleeve drives the anode plate and the cathode plate to deflect, disturbing the water flow and changing the direction of the water flow during the electrocoagulation process, so that the water flows toward the side wall of the reaction box.

[0010] As a further description of the above-mentioned electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: the interiors of the upper mounting plate and the lower mounting plate are both rotatably connected to a half gear meshing with a rack, and a swing plate is fixedly connected to the half gear.

[0011] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: it also includes a dispersion unit, which includes a suspension rope rotatably connected to the swing plate, and the bottom end of the suspension rope is fixedly connected to the upper counterweight.

[0012] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: the bottom of the upper counterweight is fixedly connected with a folded cloth, and the bottom of the folded cloth is fixedly connected with a lower counterweight.

[0013] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: a Roots blower is installed on the outside of the reaction box, an aeration pipe connected to the Roots blower is fixedly laid on the bottom of the reaction box, and an ultrasonic generator is installed on the inner wall of the reaction box.

[0014] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero discharge device: the interior of the reaction box is fixedly connected to a frame, the interior of the frame is equipped with a curtain-type MBR membrane located above the aeration pipe, the frame is fixedly connected to a water pipe connected to the curtain-type MBR membrane, and the outside of the reaction box is installed with a water pump connected to the water pipe.

[0015] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: it also includes a driving component, the driving component includes a reset spring fixed on the inner wall of the reaction box, one end of the reset spring is fixedly connected to a water baffle, one end of the water baffle is rotatably connected to a guide plate, and a tension spring is fixedly connected between the water baffle and the guide plate.

[0016] As a further description of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: the driving assembly also includes two rotating rods rotatably connected to the inside of the reaction box, a transmission belt is connected between the two rotating rods, and an impeller and a cam are fixedly connected to the rotating rod.

[0017] As a further description of the above-mentioned electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: a sleeve is fixedly connected to the inner wall of the upper mounting plate, and a torsion spring is provided between the sleeve and the half gear.

[0018] As a further description of the above-mentioned electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device: a spring a is provided between the mounting frame and the upper mounting plate, and a top rod is fixedly connected to the mounting frame.

[0019] In summary, due to the adoption of the above-mentioned technology of electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device, the beneficial effects of the present invention are:

[0020] By deflecting the anode plate and the cathode plate to disturb and guide the water inside the reaction box, the water flow is promoted to balance the flow velocity, and the water flow impacts the side wall of the reaction box, disturbing the water flow near the side wall of the reaction box, so as to achieve the purpose of balancing the flow velocity of the water flow near the side wall of the reaction box with the water flow in the middle of the reaction box, reducing the difference in the flow velocity of the water flow at various locations inside the reaction box, so that the anode plates located at different positions inside the reaction box are evenly consumed, the electric field is kept uniform, which is conducive to uniform agglomeration of suspended particles in the water and improving the electric flocculation effect;

[0021] By overlapping and staggering the electrode plates on the upper mounting plate and the lower mounting plate, the effective reaction area of ​​the electrode plates in a unit space is increased, and the efficiency of generating flocculants is improved, thereby accelerating the treatment speed of pollutants in the water and improving the water purification rate. At the same time, the electric field distribution can be made more uniform and dense, so that the electrochemical reaction can be carried out more evenly, avoiding the situation where the local reaction is too strong or too weak, making the treatment of pollutants in the water more thorough and efficient. In addition, the staggering of the electrode plates can block large-sized pollutants and prolong the time for pollutants to pass through the gaps between the electrode plates, so that the pollutants are adsorbed and wrapped by the flocs generated by the electro-flocculation, improving the electro-flocculation effect, and through aeration, the large-sized pollutants are floated and discharged, realizing the pre-treatment of impurities, reducing the filtration burden of the curtain MBR membrane, and prolonging the service life of the curtain MBR membrane;

[0022] Multiple groups of equidistantly arranged electrode plates can guide the water flow, so that the water flow forms a reasonable flow state before entering the curtain-type MBR membrane, which is conducive to evenly distributing the water flow and avoiding the situation where the local flow rate is too high or too low. When the water flow is combined with the curtain-type MBR membrane, the reasonable water flow distribution can ensure uniform pressure on the membrane surface, reduce the risk of damage to the membrane fibers, and improve the overall filtration performance of the membrane;

[0023] The cam and the return spring make the water baffle vibrate, so that the wastewater input into the reaction box from the water inlet pipe can be pushed to the middle of the reaction box, further improving the uniformity of water flow in various places inside the reaction box, facilitating the separation of impurities in the wastewater through electric flocculation, and facilitating the uniform consumption of the anode plates;

[0024] The positions of the anode plate and the cathode plate on the upper mounting plate can be adjusted so that the two sets of electrode plates can rub against each other when overlapping and staggered, thereby removing the adhesive attached to the electrode plates, achieving the effect of cleaning the surface of the electrode plates, preventing the electrode plates from being adhered by impurities and causing electrolysis to be unable to occur, ensuring the electric field balance between the electrode plates, and improving the electrocoagulation effect. In addition, the closer to the water inlet pipe, the faster the water flow rate, and the electrode plate closest to the water inlet pipe consumes the fastest. The electrode plate on the upper mounting plate can be alternated with the electrode plate on the lower mounting plate to share the loss of the electrode plate close to the water inlet pipe, thereby extending the time for replacing the electrode plate;

[0025] The swinging of the swinging plate close to the water surface can evenly disperse the floating impurities, promote the uniform thickness of the floating impurity layer at various places on the water surface, and scrape the impurities more thoroughly through the scraper, and reduce the discharge of water when scraping the impurities, thereby improving the efficiency of wastewater purification and recovery;

[0026] The swinging blades near the aeration pipes can disperse the bubbles output from the aeration pipes, improve the uniformity of aeration, and make the bubbles fully dispersed. During the floating process, the impurities condensed in various places inside the reaction box are brought up, thereby improving the separation effect of impurities. In addition, the swinging blades can also stir the activated sludge settled at the bottom of the reaction box, so that the microorganisms are dispersed in the reaction box to cooperate with the curtain MBR membrane to purify the water and avoid the generation of dead sludge.

[0027] During the swinging process, the swinging piece lifts the upper counterweight through the hanging rope to disturb the floc particles deposited at the bottom of the reaction box, so as to prevent the sticky substances produced by microorganisms from causing the floc particles to adhere to each other and become difficult to discharge. At the same time, the upper counterweight can squeeze the folded cloth to squeeze out the water in the folded cloth, and the disturbance effect is further improved by the squeezed water flow. In addition, the upper counterweight can also give the swinging piece a downward pulling force, so as to facilitate the re-engagement of the swinging piece and the rack after the disengagement.

[0028] The swing of the swinging piece and the deflection of the electrode plate can also stir the water inside the reaction box, so that the metal hydroxide generated in the water is evenly distributed, the uniformity of flocculation is improved, and impurities are prevented from being blocked between the electrode sheets after condensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An overall schematic diagram provided according to an embodiment of the present invention is shown;

[0030] Figure 2 It shows a schematic diagram of the interior of a reaction box provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a tension spring provided according to an embodiment of the present invention is shown;

[0032] Figure 4 A schematic diagram of a folded cloth provided according to an embodiment of the present invention is shown;

[0033] Figure 5 A cross-sectional schematic diagram of a lower mounting plate provided in an embodiment of the present invention is shown;

[0034] Figure 6 A schematic diagram of a sleeve provided according to an embodiment of the present invention is shown;

[0035] Figure 7 A schematic diagram of a torsion spring provided according to an embodiment of the present invention is shown.

[0036] Legend:

[0037] 10. Reaction box; 11. Partition plate; 12. Anode plate; 13. Cathode plate; 14. Roots blower; 15. Aeration pipe; 16. Water inlet pipe;

[0038] 20. Driving assembly; 21. Rotating rod; 22. Impeller; 23. Cam; 24. Water baffle; 25. Return spring; 26. Guide plate; 27. Tension spring; 28. Transmission belt;

[0039] 30. electrolysis mechanism; 31. support bar; 32. fixing bar; 33. mounting frame; 34. spring a; 35. ejector rod; 36a. upper mounting plate; 36b. lower mounting plate; 37. adjustment assembly; 371. mounting sleeve; 372. gear 1; 373. rack; 374. half gear; 375. swing plate; 38. sleeve; 39. torsion spring; 310. hydraulic rod;

[0040] 40. Dispersed unit; 41. Suspension rope; 42. Upper counterweight; 43. Folding cloth; 44. Lower counterweight;

[0041] 50. Water pump; 51. Water pipe; 52. Frame; 53. Curtain-type MBR membrane; 54. Ultrasonic generator. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0043] like Figure 1-Figure 7 As shown, the electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device provided by the present invention includes a reaction box 10 and an anode plate 12 and a cathode plate 13 arranged inside the reaction box 10. The interior of the reaction box 10 is fixedly connected with a partition 11, and the interior of the reaction box 10 is divided into a purification chamber and an impurity collection chamber by the partition 11. The impurities separated in the purification chamber will float on the water surface, and the impurities floating on the water surface are scraped into the impurity collection chamber by an external scraper. One side of the reaction box 10 is fixedly connected with a water inlet pipe 16, and also includes:

[0044] The electrolysis mechanism 30 includes a support bar 31 fixed on the inner wall of the reaction box 10 and a fixing bar 32 located below the support bar 31. The fixing bar 32 is fixed between the inner walls of the reaction box 10 on both sides. A mounting frame 33 is slidably connected to the support bar 31. A lower mounting plate 36b is fixedly connected to the fixing bar 32 by bolts. An upper mounting plate 36a is slidably connected to the mounting frame 33. An adjustment assembly 37 is provided on both the upper mounting plate 36a and the lower mounting plate 36b. A hydraulic rod 310 fixed to a rack 373 is fixedly installed on the lower mounting plate 36b.

[0045] The adjustment assembly 37 includes a plurality of groups of mounting sleeves 371 rotatably connected to the upper mounting plate 36a and the lower mounting plate 36b, each group of mounting sleeves 371 is arranged in a straight line with equal distances, a gear 1 372 is fixedly connected to the rotating shaft of each mounting sleeve 371, a rack 373 meshing with the gear 1 372 is slidably connected inside the upper mounting plate 36a and the lower mounting plate 36b, and the anode plate 12 and the cathode plate 13 are respectively fixed to the mounting sleeves 371 and arranged in a staggered manner;

[0046] The hydraulic rod 310 is extended and retracted to move the rack 373 and drive the gear 372 to rotate, so that the mounting sleeve 371 drives the anode plate 12 and the cathode plate 13 to deflect, disturbing the water flow and changing the direction of the water flow during the electrocoagulation process, so that the water flows toward the side wall of the reaction box 10, thereby improving the uniformity of the water flow rate at various locations inside the reaction box 10.

[0047] Reference Figure 5 The upper mounting plate 36a and the lower mounting plate 36b are both rotatably connected with half gears 374 meshing with the racks 373. Each group of half gears 374 are equidistantly arranged in a straight line and staggered with the anode plate 12 and the cathode plate 13. A swinging piece 375 is fixedly connected to the half gear 374. The reciprocating movement of the rack 373 drives the gear 1 372 to rotate, and at the same time drives the half gear 374 to reciprocate, so that the swinging piece 375 swings back and forth. The swinging of the swinging piece 375 close to the water surface can evenly disperse the floating floc impurities, and make the thickness of the impurity layer floating on the surface of the water body consistent, which is convenient for scraping and separating impurities. The swinging of the swinging piece 375 close to the bottom of the reaction box 10 can disperse the activated sludge deposited at the bottom of the reaction box 10, so that the microorganisms in the activated sludge are dispersed in the water, the organic matter in the water is decomposed, and the purification efficiency of impurities is improved.

[0048] Reference Figure 2 and Figure 4 , and also includes a dispersion unit 40, which includes a suspension rope 41 rotatably connected to the swing plate 375, and the bottom end of the suspension rope 41 is fixedly connected to the upper counterweight 42. Under the gravity of the upper counterweight 42, there is always a deflection force tending to the vertical between the swing plate 375 and the half gear 374. After the half gear 374 rotates and disengages from the rack 373, this deflection force can make the rack 373 re-engage with the half gear 374 when resetting, thereby driving the half gear 374 to rotate and reset, and there will be no situation where the half gear 374 cannot transmit after disengaging from the rack 373.

[0049] The bottom of the upper counterweight 42 is fixedly connected with a folding cloth 43, and the bottom of the folding cloth 43 is fixedly connected with a lower counterweight 44. The lower counterweight 44 contacts the bottom of the inner wall of the reaction box 10. When the upper counterweight 42 is pulled up by the hanging rope 41, the upper counterweight 42 drives the folding cloth 43 to move upward, and the folding cloth 43 moves upward to pull the folding cloth 43 and the lower counterweight 44 upward. At this time, the gravity of the lower counterweight 44 stretches the folding cloth 43 and generates negative pressure inside the folding cloth 43, so that the reaction box 10 is The water inside the reaction box 10 enters the interior of the folded cloth 43 through the holes in the folded cloth 43. When the lifting rope 41 no longer pulls up the upper counterweight 42, the lower counterweight 44 contacts the bottom of the reaction box 10 again. At this time, the pressure of the upper counterweight 42 compresses the folded cloth 43, so that the water inside the folded cloth 43 is squeezed out through the holes, thereby disturbing the water around the folded cloth 43, dispersing the activated sludge and deposited impurities on the bottom of the water, and preventing the impurities from being deposited for too long and sticking to each other and solidifying, making them difficult to discharge.

[0050] Reference Figure 1 and Figure 2 A Roots blower 14 is installed outside the reaction box 10, and an aeration pipe 15 connected to the Roots blower 14 is fixedly laid at the bottom of the reaction box 10. The wastewater in the reaction box 10 can be aerated through the Roots blower 14 and the aeration pipe 15, and the impurities generated by the electrocoagulation are lifted upward by the bubbles, so that the impurities can float and be scraped out and separated. The swing of the swing piece 375 at the bottom of the reaction box 10 can also disperse the aeration bubbles, making the aeration more uniform, so that the bubbles can fully lift the impurities during the floating process. The inner wall of the reaction box 10 is installed with an ultrasonic generator 5 4. The sludge flocs and mud spots attached to the anode plate 12, the cathode plate 13 and the curtain MBR membrane 53 are cleaned by ultrasonic vibration to ensure the normal operation of the equipment. The ultrasonic low-frequency vibration can generate eddy and turbulent effects, which can better penetrate and impact the dirt and impurities on the surface of the curtain MBR membrane 53, thereby more thoroughly cleaning the surface of the curtain MBR membrane 53, making the curtain MBR membrane 53 less likely to be blocked, ensuring the permeability of the curtain MBR membrane 53, and keeping the curtain MBR membrane 53 in good working condition for a long time, thereby increasing the life of the MBR membrane and reducing the treatment cost of papermaking wastewater.

[0051] A frame 52 is fixedly connected to the interior of the reaction box 10, and a curtain-type MBR membrane 53 located above the aeration pipe 15 is installed inside the frame 52. A water pipe 51 connected to the curtain-type MBR membrane 53 is fixedly connected to the frame 52. A water pump 50 connected to the water pipe 51 is installed outside the reaction box 10. The curtain-type MBR membrane 53 removes suspended solids in the water by filtering.

[0052] Reference Figure 2 and Figure 3, also includes a driving component 20, the driving component 20 includes a reset spring 25 fixed on the inner wall of the reaction box 10, one end of the reset spring 25 is fixedly connected to a water baffle 24, one end of the water baffle 24 is rotatably connected to a guide plate 26, one end of the guide plate 26 is in contact with the inner wall of the reaction box 10, to prevent water from flowing out of the water inlet pipe 16 and directly entering between the water baffle 24 and the inner wall of the reaction box 10, a tension spring 27 is fixedly connected between the water baffle 24 and the guide plate 26, and the tension of the tension spring 27 can ensure that when the position of the water baffle 24 changes, the guide plate 26 is always in close contact with the inner wall of the reaction box 10, and the water output from the water inlet pipe 16 can be guided by the guide plate 26 to enter between the anode plate 12 and the cathode plate 13 for electrocoagulation treatment, and the vibration of the water baffle 24 can make the water at the edge of the reaction box 10 flow toward the middle, thereby promoting the uniform flow of water everywhere.

[0053] Reference Figure 2 The driving assembly 20 also includes two rotating rods 21 rotatably connected to the inside of the reaction box 10, and a transmission belt 28 is connected between the two rotating rods 21. The rotating rod 21 is fixedly connected with an impeller 22 and a cam 23. The impeller 22 can drive the cam 23 to push the water baffle 24 with the help of the thrust of the water flow, and under the action of the transmission belt 28, the cams 23 on both sides can rotate synchronously in the same direction, so that the water baffles 24 on both sides move synchronously in the same direction to push the water on both sides of the reaction box 10 to the middle in turn. At the same time, the movement of the water baffle 24 will drive the upper mounting plate 36a to move, so that the anode plate 12 and the cathode plate 13 swing in the water, further improving the uniformity of water flow and making it easier for the generated metal hydroxide to fully absorb pollutants such as colloidal substances, suspended matter and heavy metal ions in the water to form flocs, thereby improving the water purification effect.

[0054] Reference Figure 6 and Figure 7 A sleeve 38 is fixedly connected to the inner wall of the upper mounting plate 36a, and a torsion spring 39 is provided between the sleeve 38 and the half gear 374. The elastic force of the torsion spring 39 provides a force for the swinging piece 375 and the half gear 374 on the upper mounting plate 36a to tend to the vertical, so as to prevent the half gear 374 from being unable to mesh with the rack 373 and reset after the half gear 374 and the rack 373 are disengaged. The half gear 374 can limit the deflection amplitude of the swinging piece 375, thereby preventing the rack 373 from moving too much and causing the swinging piece 375 to collide with the upper mounting plate 36a or the lower mounting plate 36b.

[0055] Reference Figure 6 A spring a34 is provided between the mounting frame 33 and the upper mounting plate 36a, and a push rod 35 is fixedly connected to the mounting frame 33. When the two water baffles 24 move synchronously with the help of hydraulic force through the impeller 22 and the cam 23, the upper mounting plate 36a can be driven to move, so that the push rod 35 pushes the swing plate 375, thereby driving the swing plate 375 and the electrode plate to deflect.

[0056] After ultrafine filtration, papermaking wastewater is treated with electro-flocculation, and then clean water is extracted through a water pump 50, a water pipe 51, a frame 52, a curtain-type MBR membrane 53 and an ultrasonic generator 54, so that the electro-flocculation and ultrasonic-assisted membrane dialysis are integrated to purify the papermaking wastewater. The felt cloth and the blanket are cleaned with purified clean water, which reduces the external water required for the paper machine, thereby achieving zero discharge of papermaking wastewater.

[0057] Working principle: After water is delivered to the interior of the reaction box 10 through the water inlet pipe 16, the water flows between the anode plate 12 and the cathode plate 13 under the guidance of the guide plate 26 and the water baffle 24. The metal ions generated by the anode plate 12 and the hydroxide ions generated by the cathode plate 13 react in the water to generate metal hydroxide precipitation, which adsorbs pollutants such as colloids, suspended matter and heavy metal ions in the water to form flocs. The flocs are driven to float upward by aeration in the water through the Roots blower 14 and the aeration pipe 15, and then the flocs are scraped out by the external scraper to achieve preliminary purification of the water quality. The water after preliminary purification flows to the periphery of the curtain MBR membrane 53, and the water is filtered by the water pump 50, the water delivery pipe 51, the frame 52 and the curtain MBR membrane 53 to achieve secondary purification of the water;

[0058] The water flow drives the impeller 22 to rotate, so that the rotating rod 21 and the cam 23 rotate to drive the two water baffles 24 to move synchronously in the same direction. The movement of the water baffle 24 drives the upper mounting plate 36a to move, so that the push rod 35 pushes the swing piece 375 on the upper mounting plate 36a. The swing piece 375 deflects and drives the half gear 374 to deflect, so that the rack 373 slides in the upper mounting plate 36a, thereby driving the gear 1 372 and the mounting sleeve 371 to deflect, so that the anode plate 12 and the cathode plate 13 reciprocate and deflect, thereby guiding the direction of the water flow.

[0059] The hydraulic rod 310 is controlled to extend and retract to drive the rack 373 to slide in the lower mounting plate 36b, and the electrode plate and the swing plate 375 are driven to deflect respectively through the gear 1 372 and the half gear 374. The swing plate 375 below the lower mounting plate 36b is deflected to lift the upper counterweight 42 through the suspension rope 41, driving the folding cloth 43 and the lower counterweight 44 to move upward. At this time, the gravity of the lower counterweight 44 stretches the folding cloth 43, so that water is sucked into the folding cloth 43. After the swing plate 375 is reset, the lower counterweight 44 contacts the bottom of the inner wall of the reaction box 10, and the upper counterweight 42 presses the folding cloth 43 downward to squeeze out the water in the folding cloth 43, and the surrounding impurities are disturbed by the water flow to prevent the impurities from solidifying.

[0060] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can, within the technical scope disclosed by the present invention, make equivalent replacements or changes to the integrated papermaking wastewater zero-discharge device for electro-flocculation and ultrasonic-assisted membrane dialysis and its inventive concept according to the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated papermaking wastewater zero-discharge device for electro-flocculation and ultrasonic-assisted membrane dialysis, comprising a reaction box (10) and an anode plate (12) and a cathode plate (13) arranged inside the reaction box (10), wherein a partition (11) is fixedly connected inside the reaction box (10), and a water inlet pipe (16) is fixedly connected to one side of the reaction box (10), characterized in that: Also includes: An electrolysis mechanism (30), the electrolysis mechanism (30) comprising a support bar (31) fixed inside a reaction box (10) and a fixing bar (32) located below the support bar (31), a mounting frame (33) being slidably connected to the support bar (31), a lower mounting plate (36b) being fixedly connected to the fixing bar (32), an upper mounting plate (36a) being slidably connected to the mounting frame (33), an adjustment assembly (37) being provided on both the upper mounting plate (36a) and the lower mounting plate (36b), and a hydraulic rod (310) fixed to a rack (373) being fixedly mounted on the lower mounting plate (36b); The adjustment assembly (37) comprises a plurality of mounting sleeves (371) rotatably connected to an upper mounting plate (36a) and a lower mounting plate (36b); a gear 1 (372) is fixedly connected to a rotating shaft of the mounting sleeve (371); a rack (373) meshing with the gear 1 (372) is slidably connected inside the upper mounting plate (36a) and the lower mounting plate (36b); the anode plate (12) and the cathode plate (13) are respectively fixed to the mounting sleeves (371) and arranged in a staggered manner; The hydraulic rod (310) is extended and retracted to move the rack (373) and drive the gear 1 (372) to rotate, so that the mounting sleeve (371) drives the anode plate (12) and the cathode plate (13) to deflect, disturbing the water flow and changing the direction of the water flow during the electrocoagulation process, so that the water flows toward the side wall of the reaction box (10).

2. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 1, characterized in that: The interiors of the upper mounting plate (36a) and the lower mounting plate (36b) are both rotatably connected with a half gear (374) meshing with the rack (373), and a swing plate (375) is fixedly connected to the half gear (374).

3. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 2, characterized in that: It also includes a dispersion unit (40), wherein the dispersion unit (40) includes a suspension rope (41) rotatably connected to the swing plate (375), and the bottom end of the suspension rope (41) is fixedly connected to an upper counterweight (42).

4. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 3, characterized in that: The bottom of the upper counterweight (42) is fixedly connected to a folded cloth (43), and the bottom of the folded cloth (43) is fixedly connected to a lower counterweight (44).

5. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 1, characterized in that: A Roots blower (14) is installed outside the reaction box (10), an aeration pipe (15) connected to the Roots blower (14) is fixedly laid at the bottom of the reaction box (10), and an ultrasonic generator (54) is installed on the inner wall of the reaction box (10).

6. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 5, characterized in that: The reaction box (10) is fixedly connected to a frame (52) inside, and a curtain-type MBR membrane (53) located above the aeration pipe (15) is installed inside the frame (52). A water pipe (51) connected to the curtain-type MBR membrane (53) is fixedly connected to the frame (52), and a water pump (50) connected to the water pipe (51) is installed outside the reaction box (10).

7. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 1, characterized in that: The invention also comprises a driving assembly (20), wherein the driving assembly (20) comprises a return spring (25) fixed on the inner wall of the reaction box (10), one end of the return spring (25) is fixedly connected to a water baffle plate (24), one end of the water baffle plate (24) is rotatably connected to a guide plate (26), and a tension spring (27) is fixedly connected between the water baffle plate (24) and the guide plate (26).

8. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 7, characterized in that: The driving assembly (20) further comprises two rotating rods (21) rotatably connected to the interior of the reaction box (10), a transmission belt (28) being transmission-connected between the two rotating rods (21), and an impeller (22) and a cam (23) being fixedly connected to the rotating rods (21).

9. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 1, characterized in that: A sleeve (38) is fixedly connected to the inner wall of the upper mounting plate (36a), and a torsion spring (39) is provided between the sleeve (38) and the half gear (374).

10. The electro-flocculation ultrasonic-assisted membrane dialysis integrated papermaking wastewater zero-discharge device according to claim 9, characterized in that: A spring a (34) is provided between the mounting frame (33) and the upper mounting plate (36a), and a push rod (35) is fixedly connected to the mounting frame (33).

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