A solid-liquid separation device for recycling lead paste of waste lead-acid batteries

Abstract

The invention relates to the technical field of solid-liquid separation, in particular to a solid-liquid separation device for recovering lead paste of waste lead-acid batteries, comprising a flotation tank, and a water inlet component arranged at one side of the flotation tank, a bubble output component arranged at the bottom of the flotation tank, a bubble rising component arranged inside the flotation tank, a scum cleaning component arranged inside the flotation tank, and a bubble recovery component arranged inside the flotation tank; the invention can utilize a slow water flow to drive the bubbles to rotate, so that the bubble surface uniformly adsorbs particles, improves the adsorption effect of a single bubble on particles, increases the contact probability of each bubble with particles, improves the solid-liquid separation efficiency of wastewater, and solves the technical problem that bubbles do not rotate during the floating process, resulting in poor adsorption effect of bubbles on particles and affecting the solid-liquid separation efficiency of wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of solid-liquid separation, and in particular to solid-liquid separation equipment for recycling lead paste of waste lead-acid batteries. Background Art

[0002] Lead-acid batteries are batteries whose electrodes are mainly made of lead and its oxides, and whose electrolyte is sulfuric acid solution. Recycling used lead-acid batteries not only reduces damage to the environment, but also produces wastewater that is neutralized and purified to make degradable water without causing pollution. The recycling steps of used lead-acid batteries: The recycling plant disassembles the batteries and breaks them into pieces. The broken batteries enter the pool. The heavier metals and lead will sink to the bottom, and the lighter plastic fragments will float on the water. The plastic fragments in the pool are cleaned and dried and collected for reuse. The remaining electrolyte lead and metals are refined and purified. The press squeezes the water in the lead-acid solution through the screen in the press, collects the lead paste on the press, and uses chemical deacidification to neutralize the filtered water, and allows the pollutants to settle at the bottom of the sedimentation tank, so that the wastewater meets the discharge standards. The deacidified wastewater needs to be treated by solid-liquid separation, and the flotation treatment technology is more effective.

[0003] Patent document CN2004100436411 discloses a flotation solid-liquid separation device for water treatment, which includes a flotation tank and a water outlet pipe at the bottom of the flotation tank, and also includes a plurality of vertical plates perpendicular to the bottom plane of the flotation tank and with equal spacing, an inclined plate inclined to the bottom plane of the flotation tank, and a water collecting plate parallel to the bottom plane of the flotation tank. The inclined plate is arranged between the vertical plate located above it and the water collecting plate located below it, and water holes are evenly distributed on the surface of the water collecting plate. The water collecting plate is located above the water outlet pipe and cuts off the flotation tank in the horizontal direction, so that the entire horizontal cross section of the flotation tank is fully utilized.

[0004] However, during actual use, the inventors found that when the bubbles in the flotation tank float upward, more particles are adsorbed on the top of the bubbles, and fewer particles are adsorbed on the bottom of the bubbles. The bubbles do not rotate, resulting in poor adsorption effect of the bubbles on the particles, affecting the solid-liquid separation efficiency of the wastewater. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art. By setting up a solid-liquid separation device for recycling lead paste of waste lead-acid batteries, the invention can utilize a slow water flow to drive the bubbles to rotate, so that the bubble surface evenly adsorbs particulate matter, thereby improving the adsorption effect of a single bubble on the particulate matter, increasing the contact probability of each bubble with the particulate matter, and improving the solid-liquid separation efficiency of the wastewater, thereby solving the technical problem that the bubbles do not rotate during the floating process, resulting in poor adsorption effect of the bubbles on the particulate matter and affecting the solid-liquid separation efficiency of the wastewater.

[0006] In view of the above technical problems, the technical solutions adopted are as follows:

[0007] A solid-liquid separation device for recycling lead paste of waste lead-acid batteries, comprising an air flotation tank, and a water inlet component arranged on one side of the air flotation tank, a bubble production component arranged at the bottom of the air flotation tank, a bubble rising component arranged inside the air flotation tank, a scum cleaning component arranged inside the air flotation tank, and a bubble recovery component arranged inside the air flotation tank;

[0008] The bubble rising assembly includes a filling block arranged inside the flotation tank, a plurality of rows of rising channels opened inside the filling block and used for orderly floating of bubbles, a plurality of rows of water storage channels arranged inside the filling block and located on both sides of the rising channels, a waste discharge unit arranged inside the water storage channel and used for slowly discharging water and particles into the rising channel to drive the bubbles to rotate by water flow, and a lifting unit arranged inside the water storage channel and used for sending particles in the water to the waste discharge unit;

[0009] The water inlet component passes a fixed amount of waste water into each water storage channel, and the bubbles discharged by the bubble production component enter each rising channel in an orderly manner. During the process of the bubbles rising in the rising channel, the waste discharge unit slowly discharges water and particulate matter into the rising channel. The water flow in two directions drives the bubbles to rotate, so that the bubble surface evenly adsorbs particulate matter. The bubbles that adsorb particulate matter are discharged through the scum cleaning component, and the bubbles that do not adsorb particulate matter are returned to the flotation tank through the bubble recovery component to continue to adsorb particulate matter.

[0010] Preferably, the waste discharge unit includes two groups of semicircular cavities which are staggered up and down and arranged on the two inner walls opposite to each other of the water storage channel, a waste discharge hole which is arranged on the inner wall of the semicircular cavity and connected to the ascending channel, a first rotating shaft which passes through and rotatably arranged in the semicircular cavity, and several groups of paddles which are arranged on the first rotating shaft and slideably cooperate with the inner wall of the semicircular cavity, and the two first rotating shafts rotate synchronously in opposite directions through the transmission method of pulleys and belts.

[0011] Preferably, the lifting unit includes a filter plate that is lifted and lowered inside the water storage channel and used to intercept particulate matter in the water, a accommodating cavity provided on the inner wall of the water storage channel, a second rotating shaft that passes through and rotates inside the accommodating cavity, an eccentric wheel provided on the second rotating shaft, an annular limiting groove provided on the outer wall of the eccentric wheel, a limiting block that is slidably provided on the annular limiting groove, a rotating rod that passes through and rotates inside the water channel, a hanging rope that is provided on the limiting block and one end of which passes around the rotating rod to be tied to the filter plate, several groups of separating rods provided inside the water storage channel, and several groups of ejectors provided on the separating rods and used to clean the filter holes of the filter plate, and the second rotating shaft rotates synchronously with the first rotating shaft through a pulley and a belt transmission method.

[0012] Preferably, the bubble generating assembly comprises a bubble generating unit arranged at the bottom of the flotation tank and a guiding unit arranged at the lower end of the filling block and used for guiding the bubbles into the ascending channel.

[0013] Preferably, the bubble generating unit comprises two groups of shear chambers arranged at the bottom of the flotation tank, a diffusion cover arranged at the upper end of the shear chamber, a third rotating shaft rotatably arranged at the bottom of the shear chamber and one end of which passes through the bottom of the flotation tank, an impeller arranged at the upper end of the third rotating shaft and located inside the shear chamber, a first air inlet pipe arranged at the bottom of the flotation tank and connected to the inside of the shear chamber, a first one-way valve arranged on the first air inlet pipe, and a stepper motor arranged at the bottom of the flotation tank and used to drive one of the third rotating shafts, and the two third rotating shafts rotate synchronously through a transmission method of a pulley and a belt.

[0014] Preferably, the guide unit includes a partition arranged at the lower end of the filling block, a plurality of rows of guide ports arranged on the partition and corresponding to the lower port of the ascending channel, a plurality of rows of wedge bars arranged on the partition and respectively located on both sides of the guide ports, a water receiving trough opened on the top of the wedge bar and penetrating upward through the partition to receive water out of the lower port of the water storage channel, a transfer chamber opened inside the wedge bar, a plurality of groups of first turbulence holes evenly opened on the lower slope of the wedge bar and connected to the interior of the transfer chamber, and a first pump body arranged on the top of the transfer chamber and used to pump water in the water receiving trough into the transfer chamber.

[0015] Preferably, the water inlet assembly includes a water distribution pipe arranged on the top of the filling block and used to drain the wastewater to the upper ports of each water storage channel, a barrel filter arranged on one side of the flotation tank and used to pre-treat the wastewater, a water inlet pipe arranged at the water outlet of the barrel filter and one end of which is connected to the water distribution pipe, and a second pump body arranged at the water inlet end of the barrel filter.

[0016] Preferably, the bubble recovery assembly includes a sieve plate arranged inside the flotation tank and used for bubbles that have not absorbed particulate matter to rise and pass through, an inclined plate arranged inside the flotation tank, a sealing cover arranged on the top of the flotation tank, a third pump body arranged on the sealing cover and used to inject water into the flotation tank, several groups of second turbulence holes evenly opened on the top of the inclined plate and used to prevent bubbles from rising vertically, a reflux channel opened on the side wall of the flotation tank and located at the bottom of the inclined plate and close to the sealing cover, a microporous ceramic diffuser plate arranged on the inner wall of the flotation tank and located close to the reflux channel, a second air inlet pipe arranged on the side wall of the flotation tank and connected to the microporous ceramic diffuser plate, several groups of reflux tubes respectively arranged on the water distribution pipe and connected to the reflux channel, several groups of bubble discharge holes arranged on the top of the reflux tube, several groups of reflux pipes arranged at the bottom of the reflux tube and connected to the water distribution pipe, and a second one-way valve arranged on the reflux pipe.

[0017] Preferably, the slag cleaning assembly includes two groups of sprockets arranged on the inner wall of the flotation tank through a fourth rotating shaft, a chain arranged between the two sprockets, several groups of push plates arranged on the chain and in contact with the bottom of the screen plate, a receiving plate arranged on the push plate, a slag collecting box arranged on the outer wall of the flotation tank, several groups of bubble breaking thorns arranged inside the slag collecting box, a fifth rotating shaft rotatably arranged inside the slag collecting box, a spoiler arranged on the fifth rotating shaft, a flow block arranged inside the slag collecting box, a water outlet pipe opened on the side wall of the flotation tank, and a slag discharge door hingedly arranged at the bottom of the slag collecting box.

[0018] Preferably, the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft work together through a transmission method of a bevel gear set and a belt and a pulley, and the speed of each rotating shaft is adjusted by a reduction belt.

[0019] Beneficial effects of the present invention:

[0020] (1) The present invention cooperates with the bubble rising component and the bubble output component. On the one hand, the slow water flow can be used to drive the bubbles to rotate, ensuring that the circumferential surface of the bubbles can contact the particles during the floating process, so that the bubble surface evenly adsorbs the particles, thereby improving the adsorption effect of a single bubble on the particles. On the other hand, in the process of driving the bubbles to rotate by the slow water flow, the wastewater containing particles can be gradually discharged into the rising channel, and even the particles can be sent to the bubble surface. The bubbles float up in an orderly manner in the narrow rising channel, increasing the contact probability of each bubble with the particles, improving the adsorption effect of all bubbles on the particles, and thus improving the solid-liquid separation efficiency of the wastewater.

[0021] (2) The present invention cooperates with the bubble production component and the bubble rising component. On the one hand, the bubbles can be directed to each rising channel to ensure that the bubbles float up in an orderly manner in the rising channel, so that a single bubble can be subjected to rotation processing to ensure that more bubbles can adsorb particles. On the other hand, when the bubble enters the rising channel, the bubble can be driven to rotate to ensure that the circumferential surface of the bubble can contact the particles in the rising channel, so that the bubble surface evenly adsorbs the particles.

[0022] (3) The present invention cooperates with the bubble recovery component and the water storage channel. On the one hand, it can replenish clean water into the water storage channel to avoid the difficulty in discharging particulate matter due to the low liquid level in the water storage channel, thereby ensuring that the water storage channel can completely discharge particulate matter and that the water storage channel can continuously transport clean water into the wedge strip to ensure that the guide unit can continuously guide the bubbles to enter the ascending channel in an orderly manner. On the other hand, it can screen and collect bubbles that do not absorb particulate matter, and recycle and utilize bubbles to absorb particulate matter that sinks from the bottom of the screen plate, so that the particulate matter that sinks from the bottom of the screen plate can rise again, thereby preventing the particulate matter from sinking into the ascending channel, thereby facilitating the discharge of particulate matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 The present invention is a structural schematic diagram of a solid-liquid separation device for recycling lead paste of waste lead-acid batteries.

[0025] Figure 2 for Figure 1 Schematic diagram of the structure from an upward perspective.

[0026] Figure 3 Schematic diagram of the internal structure of the flotation tank.

[0027] Figure 4 for Figure 3 The structural front view.

[0028] Figure 5 This is a schematic diagram of the structure of the bubble production component.

[0029] Figure 6 A schematic diagram of the structure of the guide unit.

[0030] Figure 7 Schematic diagram of the structure of the bubble generating unit.

[0031] Figure 8Schematic diagram of the transmission working for the guide unit.

[0032] Fig. 9 A schematic diagram of the structure of the scum cleaning component.

[0033] Fig.10 for Fig. 9 The structural front view.

[0034] Fig.11 This is a schematic diagram of the structure inside the slag collection box.

[0035] Fig.12 This is a schematic diagram of the water distribution pipe structure.

[0036] Fig.13 It is a schematic diagram of the structure of the reflux cylinder.

[0037] Fig.14 Schematic diagram of the structure inside the reflux cylinder.

[0038] Fig.15 Schematic diagram of the structure of the bubble rising component.

[0039] Fig.16 Schematic diagram of the structure inside the filling block.

[0040] Fig.17 Schematic diagram of the transmission working for the waste discharge unit.

[0041] Fig.18 Schematic diagram of the transmission working for the lifting unit.

[0042] Fig.19 It is a structural diagram of embodiment 2. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0044] Embodiment 1

[0045] like Figure 1-Figure 18 As shown, a solid-liquid separation device for recycling lead paste of waste lead-acid batteries comprises an air flotation tank 1, and a water inlet component 2 arranged at one side of the air flotation tank 1, a bubble production component 3 arranged at the bottom of the air flotation tank 1, a bubble rising component 4 arranged inside the air flotation tank 1, a scum cleaning component 5 arranged inside the air flotation tank 1, and a bubble recovery component 6 arranged inside the air flotation tank 1;

[0046] The bubble rising component 4 includes a filling block 41 disposed inside the flotation tank 1, a plurality of rows of rising channels 42 which are arranged in the filling block 41 and are used for orderly floating of bubbles, a plurality of rows of water storage channels 43 which are arranged in the filling block 41 and are respectively located on both sides of the rising channel 42, a waste discharge unit 44 which is arranged in the water storage channel 43 and is used for slowly discharging water and particles into the rising channel 42 to drive the bubbles to rotate by water flow, and a lifting unit 45 which is arranged in the water storage channel 43 and is used for sending particles in the water to the waste discharge unit 44;

[0047] The water inlet component 2 passes a certain amount of waste water into each water storage channel 43, and the bubbles discharged by the bubble production component 3 enter each rising channel 42 in an orderly manner. During the rising process of the bubbles in the rising channel 42, the waste discharge unit 44 slowly discharges water and particulate matter into the rising channel 42. The water flow in two directions drives the bubbles to rotate, so that the bubble surface evenly adsorbs particulate matter. The bubbles that adsorb particulate matter are discharged through the scum cleaning component 5, and the bubbles that do not adsorb particulate matter are returned to the inside of the flotation tank 1 through the bubble recovery component 6 to continue to adsorb particulate matter.

[0048] It should be noted that the solid-liquid separation device of the present invention can process a fixed amount of wastewater at a time, that is, after injecting a fixed amount of wastewater into the flotation tank 1, the injection is stopped, and new wastewater is injected again after the solid-liquid separation work is completed.

[0049] It is worth mentioning that in the recycling process of waste lead-acid batteries, after filtering out the lead paste, the filtered water is neutralized by chemical deacidification, and the pollutants are allowed to settle at the bottom of the sedimentation tank so that the wastewater meets the discharge standards; pollutants precipitate slowly on their own, and flotation can remove pollutants quickly, achieving the effect of solid-liquid separation.

[0050] In this embodiment, by cooperating with the bubble rising component 4 and the bubble producing component 3, on the one hand, the bubble can be driven to rotate by slow water flow, ensuring that the circumferential surface of the bubble can contact the particulate matter during the floating process, so that the bubble surface evenly adsorbs the particulate matter, thereby improving the adsorption effect of a single bubble on the particulate matter; on the other hand, in the process of driving the bubble to rotate by slow water flow, the wastewater containing the particulate matter can be gradually discharged into the rising channel 42, and even the particulate matter can be sent to the bubble surface, and the bubbles float up in an orderly manner in the narrow rising channel 42, thereby increasing the contact probability of each bubble with the particulate matter, improving the adsorption effect of all bubbles on the particulate matter, and thus improving the solid-liquid separation efficiency of the wastewater.

[0051] In detail, the wastewater is first coarsely filtered through the barrel filter 22 to filter out large volumes of suspended solids in the wastewater. The wastewater after quantitative coarse filtration flows into the flotation tank 1 from the water inlet pipe 23, and then flows into each water storage channel 43 through the water distribution pipe 21. The wastewater in the water storage channel 43 is then filtered for the second time through the filter screen plate 451 to intercept particulate matter in the wastewater. The clean water after the second filtration fills the entire flotation tank 1, and the water inlet pipe 23 stops injecting wastewater. Then, a large number of bubbles produced by the bubble production component 3 enter each ascending channel 42 in an orderly manner. The waste discharge unit 44 slowly discharges the particulate matter intercepted inside the water storage channel 43 into the ascending channel 42 along with the wastewater, and drives the bubbles to rotate, so that the bubble surface evenly adsorbs the particulate matter. When the bubble floats to the screening plate 61, the unadsorbed particles The bubbles of the adsorbed particles can rise and pass through the sieve holes of the sieve plate 61 due to their small volume, while the bubbles of the adsorbed particles stay at the bottom of the sieve plate 61 and burst due to their large volume. The scum cleaning component 5 cleans the particles gathered at the bottom of the sieve plate 61 in time, and the bubble recovery component 6 recovers the bubbles of the unadsorbed particles above the sieve plate 61 and drains them into the reflux tube 68 above the filling block 41, and additional bubbles are added. The bubbles in the reflux tube 68 float up again to adsorb the particles sinking from the bottom of the sieve plate 61, and the clean water in the reflux tube 68 flows into each water storage channel 43 through the water distribution pipe 21, replenishing water into the water storage channel 43 until all the particles in the water storage channel 43 are discharged. Finally, the clean water in the flotation tank 1 is completely discharged from the outlet pipe 59 for next use.

[0052] Further, if Figure 1-Figure 4 As shown, the water inlet assembly 2 includes a water distribution pipe 21 arranged on the top of the filling block 41 and used to drain the wastewater to the upper ports of each water storage channel 43, a barrel filter 22 arranged on one side of the flotation tank 1 and used to pre-treat the wastewater, a water inlet pipe 23 arranged at the water outlet end of the barrel filter 22 and one end of which is connected to the water distribution pipe 21, and a second pump body 24 arranged at the water inlet end of the barrel filter 22.

[0053] It should be noted that the structure and function of the barrel filter 22 are both prior art and will not be described in detail.

[0054] In this embodiment, the water inlet assembly 2 is provided to firstly perform coarse filtration on the wastewater to filter out large volumes of suspended solids in the wastewater, and then drain a certain amount of wastewater into each water storage channel 43 on the filling block 41 to fill the entire flotation tank 1.

[0055] In detail, the second pump body 24 first sucks the wastewater into the barrel filter 22, and the wastewater is first coarsely filtered through the barrel filter 22 to filter out large volumes of suspended matter in the wastewater. The wastewater after quantitative coarse filtration flows into the flotation tank 1 from the water inlet pipe 23, and then flows into each water storage channel 43 through the water distribution pipe 21. The wastewater in the water storage channel 43 is then filtered for the second time through the filter screen plate 451 to intercept particulate matter in the wastewater. The clean water after the second filtration flows from the lower port of the water storage channel 43 to the water receiving trough 324, the wedge bar 323, the first turbulent hole 326, the guide port 322, the rising channel 42, the screening plate 61, and the sealing cover 63 in sequence until the entire flotation tank 1 is filled.

[0056] Further, if Figure 2-Figure 8 and Fig.16 As shown, the bubble generating assembly 3 includes a bubble generating unit 31 disposed at the bottom of the flotation tank 1 and a guiding unit 32 disposed at the lower end of the filling block 41 and used for guiding the bubbles into the ascending channel 42;

[0057] The bubble generating unit 31 includes two groups of shear chambers 311 arranged at the bottom of the flotation pool 1, a diffusion cover 312 arranged at the upper end of the shear chamber 311, a third rotating shaft 313 rotatably arranged at the bottom of the shear chamber 311 and one end of which passes through the bottom of the flotation pool 1, an impeller 314 arranged at the upper end of the third rotating shaft 313 and located inside the shear chamber 311, a first air inlet pipe 315 arranged at the bottom of the flotation pool 1 and connected to the inside of the shear chamber 311, a first one-way valve arranged on the first air inlet pipe 315, and a stepping motor 316 arranged at the bottom of the flotation pool 1 and used to drive the third rotating shaft 313, and the two third rotating shafts 313 rotate synchronously through the transmission mode of pulleys and belts;

[0058] The guide unit 32 includes a partition 321 arranged at the lower end of the filling block 41, a plurality of guide ports 322 arranged in a row on the partition 321 and corresponding to the lower port of the ascending channel 42, a plurality of wedge bars 323 arranged in a row on the partition 321 and respectively located on both sides of the guide port 322, a water receiving trough 324 opened at the top of the wedge bar 323 and penetrating upward through the partition 321 to receive water out of the lower port of the water storage channel 43, a transfer chamber 325 opened inside the wedge bar 323, a plurality of groups of first turbulence holes 326 evenly opened on the lower slope of the wedge bar 323 and connected to the interior of the transfer chamber 325, and a first pump body 327 arranged at the top of the transfer chamber 325 and used to pump water in the water receiving trough 324 into the transfer chamber 325.

[0059] In this embodiment, by cooperating with the bubble producing component 3 and the bubble rising component 4, on the one hand, the bubbles can be drained into each rising channel 42 to ensure that the bubbles float up in an orderly manner in the rising channel 42, so that a single bubble can be rotated to ensure that more bubbles can be adsorbed on particulate matter; on the other hand, when the bubble enters the rising channel 42, the bubble can be driven to rotate to ensure that the circumferential surface of the bubble in the rising channel 42 can contact the particulate matter, so that the bubble surface evenly adsorbs the particulate matter.

[0060] In detail, after the wastewater fills the entire flotation tank 1, first, air is charged into the shear chamber 311 from the first air inlet pipe 315, and the stepper motor 316 drives the impeller 314 to rotate at a high speed through the third rotating shaft 313 to shear the air to generate bubbles, and the bubbles rise and diffuse from the diffusion cover 312; then, the clean water filtered in the water storage channel 43 flows from the lower port into the water receiving groove 324 on the top of the wedge bar 323, and the first pump body 327 then sucks the clean water in the water receiving groove 324 into the transfer chamber 325. Due to the high pressure, the clean water in the transfer chamber 325 slowly flows out from the first turbulent hole 326, and the water flow out of the first turbulent hole 326 drives the bubbles to rotate, and guides the bubbles to rise from the guide port 322 into the rising channel 42.

[0061] Further, if Figure 15-17 As shown, the waste discharge unit 44 includes two groups of semicircular cavities 441 which are staggered up and down and arranged on the two inner walls opposite to each other of the water storage channel 43, a waste discharge hole 442 which is arranged on the inner wall of the semicircular cavity 441 and is connected to the rising channel 42, a first rotating shaft 443 which passes through and rotatably arranged in the semicircular cavity 441, and a plurality of groups of paddles 444 which are arranged on the first rotating shaft 443 and slidably cooperate with the inner wall of the semicircular cavity 441, and the two first rotating shafts 443 rotate synchronously in opposite directions through the transmission method of pulleys and belts.

[0062] In this embodiment, by providing a waste discharge unit 44, the particles intercepted in the water storage channel 43 can be intermittently and slowly discharged into the rising channel 42, so as to facilitate the adsorption of bubbles in the rising channel 42. At the same time, a slow water flow can be generated to drive the bubbles in the rising channel 42 to self-rotate, so that the bubbles have more area to adsorb particles.

[0063] In detail, the first rotating shaft 443 drives the paddle 444 to rotate slowly, so that the wastewater in the water storage channel 43 carries the particulate matter and flows into the rising channel 42 from the waste discharge hole 442. The two slow water flows simultaneously impact the bottom and top of the bubbles in different directions to drive the bubbles to rotate, so that the bubbles can better adsorb the particulate matter in the rising channel 42.

[0064] Further, if Figure 16-18As shown, the lifting unit 45 includes a filter plate 451 which is lifted and arranged inside the water storage channel 43 and is used to intercept particulate matter in the water, a accommodating chamber opened on the inner wall of the water storage channel 43, a second rotating shaft 452 which is penetrated and rotatably arranged inside the accommodating chamber, an eccentric wheel 453 arranged on the second rotating shaft 452, an annular limiting groove arranged on the outer wall of the eccentric wheel 453, a limiting block slidably arranged on the annular limiting groove, a rotating rod 454 which is penetrated and rotatably arranged inside the water channel, a hanging rope 455 which is arranged on the limiting block and one end of which passes around the rotating rod 454 to be tied to the filter plate 451, several groups of separating rods 456 arranged inside the water storage channel 43 and several groups of ejectors 457 arranged on the separating rods 456 and used to clean the filter holes of the filter plate 451, and the second rotating shaft 452 rotates synchronously with the first rotating shaft 443 through a pulley and a belt transmission method.

[0065] It should be noted that, during the process of the water inlet assembly 2 injecting waste water into the water storage channel 43, the filter holes of the filter plate 451 are separated from the ejector pin 457, and the filter holes of the filter plate 451 are unobstructed, ensuring that the filter plate 451 has a filtering function.

[0066] It is worth mentioning that the filter holes of the filter plate 451 are normally open. After the ejector pin 457 is inserted into the filter holes of the filter plate 451 for cleaning, it will be quickly pulled out without affecting the filtering function of the filter plate 451.

[0067] In this embodiment, by providing a lifting unit 45, on the one hand, the particulate matter intercepted in the water storage channel 43 can be sent to the position of the paddle 444, so as to facilitate the rapid discharge of the particulate matter in the water storage channel 43 and improve the solid-liquid separation efficiency of the wastewater. On the other hand, the filter plate 451 can also be self-cleaned to avoid clogging of the filter plate 451, thereby facilitating the reuse of the filter plate 451 and improving the service life of the filter plate 451.

[0068] In detail, the second rotating shaft 452 drives the eccentric wheel 453 to rotate, and the eccentric wheel 453 rises through the filter plate 451. The filter plate 451 sends the particulate matter to the position of the paddle 444. Then, the filter plate 451 drops due to its own gravity, so that the ejector pin 457 is inserted into the filter hole of the filter plate 451 for cleaning, thereby avoiding clogging of the filter plate 451.

[0069] Further, if Figure 4 , Fig.10 and Figure 12-Figure 14As shown, the bubble recovery assembly 6 includes a sieve plate 61 arranged inside the flotation tank 1 and used for bubbles that have not absorbed particulate matter to rise and pass through, an inclined plate 62 arranged inside the flotation tank 1, a sealing cover 63 arranged on the top of the flotation tank 1, a third pump body arranged on the sealing cover 63 and used to inject water into the flotation tank 1, a plurality of groups of second turbulence holes 64 evenly opened on the top of the inclined plate 62 and used to prevent bubbles from rising vertically, and a reflux pump 65 opened on the side wall of the flotation tank 1 and located at the bottom of the inclined plate 62 and close to the sealing cover 63. channel 65, a microporous ceramic diffuser plate 66 arranged on the inner wall of the floating pool and located near the reflux channel 65, a second air inlet pipe 67 arranged on the side wall of the flotation pool 1 and connected to the microporous ceramic diffuser plate 66, several groups of reflux tubes 68 respectively arranged on the water distribution pipe 21 and connected to the reflux channel 65, several groups of bubble discharge holes 69 arranged on the top of the reflux tube 68, several groups of reflux pipes 691 arranged at the bottom of the reflux tube 68 and connected to the water distribution pipe 21, and a second one-way valve arranged on the reflux pipe 691.

[0070] It should be noted that the bubbles of non-adsorbed particles can rise through the sieve holes of the sieve plate 61, while the bubbles of adsorbed particles cannot pass through the sieve holes of the sieve plate 61 and burst. The bubbles of adsorbed particles will not block the sieve holes of the sieve plate 61, ensuring that a small number of bubbles of non-adsorbed particles can pass through the sieve holes of the sieve plate 61.

[0071] It should also be noted that the structure and function of the microporous ceramic diffuser plate 66 are existing technologies and will not be elaborated on. Since the number of bubbles recovered without adsorbed particulate matter is small, the microporous ceramic diffuser plate 66 serves to supplement the number of bubbles to ensure that there are enough bubbles that can flow back to adsorb the particulate matter that sinks from the bottom of the sieve plate 61.

[0072] It should also be noted that the clean water in the water storage channel 43 is continuously discharged into the wedge strip 323, and the liquid level in the water storage channel 43 will gradually decrease. Therefore, it is necessary to add clean water to the water storage channel 43 until all the particles are discharged from the water storage channel 43. Therefore, the reflux channel 65, the reflux tube 68, and the reflux pipe 691 are used to drain the clean water on the top of the flotation tank 1 into the water storage channel 43 to ensure that the water storage channel 43 is full of water.

[0073] It is worth mentioning that the third pump body draws the existing clean water outside into the flotation tank 1, and forms a slow water flow through the second turbulent hole 64, which impacts the bubbles downward to prevent the bubbles from rising and contacting the inclined plate 62 and bursting. The bubbles have a tendency to rise all the time, and the slow water flow guides the bubbles to flow along the lower position of the inclined plate 62 to the reflux channel 65, reducing the bubble bursting rate.

[0074] It is also worth mentioning that while the third pump body is pumping the existing clean water outside into the flotation tank 1, the outlet pipe 59 is constantly discharging the clean water in the flotation tank 1, and the water flow speeds of the two are the same, ensuring that the flotation tank 1 is full of water.

[0075] In this embodiment, through the cooperation of the bubble recovery component 6 and the water storage channel 43, on the one hand, clean water can be added to the water storage channel 43 to avoid the liquid level in the water storage channel 43 being too low to make it difficult to discharge particulate matter, thereby ensuring that the water storage channel 43 can completely discharge particulate matter, and also ensuring that the water storage channel 43 can continuously transport clean water into the wedge bar 323 to ensure that the guide unit 32 can continuously guide the bubbles to enter the rising channel 42 in an orderly manner; on the other hand, bubbles that do not absorb particulate matter can be screened and collected, and the bubbles can be recycled to absorb the particulate matter that has sunk from the bottom of the screen plate 61, so that the particulate matter that has sunk from the bottom of the screen plate 61 can rise again, thereby preventing the particulate matter from sinking into the rising channel 42, thereby facilitating the discharge of particulate matter.

[0076] In detail, when the bubbles floating up from the inside of the rising channel 42 reach the bottom of the sieve plate 61, the bubbles that have not absorbed the particles can continue to rise through the sieve holes of the sieve plate 61, while the bubbles that have absorbed the particles cannot pass through the sieve holes of the sieve plate 61 and burst. The third pump body draws the existing clean water outside into the flotation tank 1, so that the second turbulent holes 64 of the inclined plate 62 form a slow water flow obliquely downward, guiding the bubbles to flow to the reflux channel 65 along the lower position of the inclined plate 62. At the same time, the microporous ceramic diffuser plate 66 replenishes the number of bubbles, and the bubbles flow into the reflux tube 68 from the reflux channel 65 along with the clean water. The bubbles in the reflux tube 68 are discharged from the bubble discharge holes 69 and float up to absorb the particles sinking from the bottom of the sieve plate 61, so as to prevent the particles from sinking into the rising channel 42 or on the filling block 41. At the same time, the clean water in the reflux tube 68 flows downward from the reflux pipe 691 into the water distribution pipe 21, and then replenishes the clean water into each water storage channel 43.

[0077] Further, if Figure 4 and Figure 9-11 As shown, the slag cleaning assembly 5 includes two groups of sprockets arranged on the inner wall of the flotation tank 1 through a fourth rotating shaft, a chain 51 arranged between the two sprockets, several groups of push plates 52 arranged on the chain 51 and in contact with the bottom of the screening plate 61, a receiving plate 53 arranged on the push plate 52, a slag collecting box 54 arranged on the outer wall of the flotation tank 1, several groups of bubble breaking spikes 55 arranged inside the slag collecting box 54, a fifth rotating shaft 56 rotatably arranged inside the slag collecting box 54, a spoiler 57 arranged on the fifth rotating shaft 56, a flow blocking block 58 arranged inside the slag collecting box 54, and a water outlet pipe 59 opened on the side wall of the flotation tank 1.

[0078] It should be noted that the first rotating shaft 443, the second rotating shaft 452, the third rotating shaft 313, the fourth rotating shaft and the fifth rotating shaft 56 work together through a transmission method of a bevel gear set and a belt and a pulley, and the speed of each rotating shaft is adjusted by a reduction belt.

[0079] It is worth mentioning that the speed at which the clean water is discharged from the water outlet pipe 59 is equal to the speed at which the third pump body in the bubble recovery assembly 6 injects external clean water into the flotation tank 1, ensuring that the inside of the flotation tank 1 is full of water.

[0080] In this embodiment, the scum cleaning assembly 5 is provided to facilitate automatic collection of particles at the bottom of the screening plate 61 .

[0081] In detail, the bubbles that adsorb the particles cannot break through the sieve holes of the screening plate 61 to release the particles. At the same time, the chain 51 drives the push plate 52 and the receiving plate 53 to catch the particles and send them to the slag collecting box 54. The bubble-breaking thorns 55 pierce the bubbles entering the slag collecting box 54 to ensure that all the particles in the slag collecting box 54 sink. At the same time, the fifth shaft 56 drives the spoiler 57 to rotate. The water flow formed by the spoiler 57 blows the sinking particles to the side of the slag collecting box 54 to prevent the push plate 52 and the receiving plate 53 from taking out the particles in the slag collecting box 54 again.

[0082] Embodiment 2

[0083] like Fig.19 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0084] Further, if Fig.19 As shown, a slag discharge door 541 is hingedly provided at the bottom of the slag collecting box 54 , and a handle 542 is provided on the slag discharge door 541 .

[0085] In this embodiment, the slag discharge door 541 is provided to facilitate the removal of the particles collected in the slag collecting box 54 .

[0086] Working process:

[0087] First, the wastewater is coarsely filtered through the barrel filter 22 to filter out large volumes of suspended solids in the wastewater. The wastewater after quantitative coarse filtration flows into the flotation tank 1 from the water inlet pipe 23, and then flows into each water storage channel 43 through the water distribution pipe 21. The wastewater in the water storage channel 43 is then filtered for the second time through the filter screen plate 451 to intercept particulate matter in the wastewater. The clean water after the second filtration fills the entire flotation tank 1, and the water inlet pipe 23 stops injecting wastewater. Then, a large number of bubbles produced by the bubble production component 3 enter each ascending channel 42 in an orderly manner. The waste discharge unit 44 slowly discharges the particulate matter intercepted inside the water storage channel 43 into the ascending channel 42 along with the wastewater, and drives the bubbles to rotate, so that the bubble surface evenly adsorbs the particulate matter. When the bubble floats to the screening plate 61, the unadsorbed particulate matter The bubbles can rise and pass through the sieve holes of the sieve plate 61 due to their small volume, while the bubbles that adsorb particles stay at the bottom of the sieve plate 61 and burst due to their large volume. The scum cleaning component 5 cleans up the particles gathered at the bottom of the sieve plate 61 in time, and the bubble recovery component 6 recovers the bubbles that do not adsorb particles above the sieve plate 61 and drains them into the reflux cylinder 68 above the filling block 41, and additional bubbles are added. The bubbles in the reflux cylinder 68 float up again to adsorb the particles that sink from the bottom of the sieve plate 61, and the clean water in the reflux cylinder 68 flows into each water storage channel 43 through the water distribution pipe 21, replenishing water into the water storage channel 43 until all the particles in the water storage channel 43 are discharged. Finally, the clean water in the flotation tank 1 is completely discharged from the outlet pipe 59 for next use.

[0088] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0089] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0090] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A solid-liquid separation device for recycling lead paste of waste lead-acid batteries, characterized in that: It includes an air flotation tank, a water inlet assembly arranged on one side of the air flotation tank, a bubble production assembly arranged at the bottom of the air flotation tank, a bubble rising assembly arranged inside the air flotation tank, a scum cleaning assembly arranged inside the air flotation tank, and a bubble recovery assembly arranged inside the air flotation tank; The bubble rising assembly includes a filling block arranged inside the flotation tank, a plurality of rows of rising channels opened inside the filling block and used for orderly floating of bubbles, a plurality of rows of water storage channels arranged inside the filling block and located on both sides of the rising channels, a waste discharge unit arranged inside the water storage channel and used for slowly discharging water and particles into the rising channel to drive the bubbles to rotate by water flow, and a lifting unit arranged inside the water storage channel and used for sending particles in the water to the waste discharge unit; The water inlet component passes a fixed amount of waste water into each water storage channel, and the bubbles discharged by the bubble production component enter each ascending channel in an orderly manner. During the process of the bubbles rising in the ascending channel, the waste discharge unit slowly discharges water and particles into the ascending channel. The water flow in two directions drives the bubbles to rotate, so that the bubble surface evenly adsorbs particles. The bubbles adsorbing particles are discharged through the scum cleaning component, and the bubbles that do not adsorb particles flow back to the flotation tank through the bubble recovery component to continue to adsorb particles. The waste discharge unit comprises two groups of semicircular cavities arranged at two inner side walls of the water storage channel at staggered positions, respectively, a waste discharge hole arranged on the inner wall of the semicircular cavities and connected to the ascending channel, a first rotating shaft that penetrates and rotates in the semicircular cavities, and a plurality of groups of paddles arranged on the first rotating shaft and slidably matched with the inner wall of the semicircular cavities, and the two first rotating shafts rotate synchronously in opposite directions through a transmission method of a pulley and a belt; The lifting unit includes a filter plate that is lifted and arranged inside the water storage channel and is used to intercept particulate matter in the water, a accommodating cavity opened on the inner wall of the water storage channel, a second rotating shaft that passes through and rotates inside the accommodating cavity, an eccentric wheel arranged on the second rotating shaft, an annular limiting groove arranged on the outer wall of the eccentric wheel, a limiting block slidably arranged on the annular limiting groove, a rotating rod that passes through and rotates inside the water channel, a hanging rope that is arranged on the limiting block and one end of which passes around the rotating rod to be tied to the filter plate, several groups of separating rods arranged inside the water storage channel, and several groups of ejectors arranged on the separating rods and used to clean the filter holes of the filter plate. The second rotating shaft rotates synchronously with the first rotating shaft through a pulley and a belt transmission method.

2. A solid-liquid separation device for recycling lead paste of waste lead-acid batteries according to claim 1, characterized in that: The bubble generating assembly comprises a bubble generating unit arranged at the bottom of the air flotation tank and a guiding unit arranged at the lower end of the filling block and used for guiding the bubbles into the ascending channel.

3. A solid-liquid separation device for recovering lead paste of waste lead-acid batteries according to claim 2, characterized in that: The bubble generating unit comprises two groups of shear chambers arranged at the bottom of the flotation pool, a diffusion cover arranged at the upper end of the shear chamber, a third rotating shaft rotatably arranged at the bottom of the shear chamber and one end of which passes through the bottom of the flotation pool, an impeller arranged at the upper end of the third rotating shaft and located inside the shear chamber, a first air inlet pipe arranged at the bottom of the flotation pool and connected to the inside of the shear chamber, a first one-way valve arranged on the first air inlet pipe, and a stepper motor arranged at the bottom of the flotation pool and used to drive one of the third rotating shafts. The two third rotating shafts rotate synchronously through a transmission method of a pulley and a belt.

4. A solid-liquid separation device for recycling lead paste of waste lead-acid batteries according to claim 3, characterized in that: The guide unit includes a partition plate arranged at the lower end of the filling block, a plurality of guide ports arranged in rows on the partition plate and corresponding to the lower port of the ascending channel, a plurality of wedge bars arranged in rows on the partition plate and respectively located on both sides of the guide ports, a water receiving trough opened on the top of the wedge bar and penetrating upward through the partition plate to receive water outflowing from the lower port of the water storage channel, a transfer chamber opened inside the wedge bar, a plurality of groups of first turbulence holes evenly opened on the lower inclined surface of the wedge bar and connected to the interior of the transfer chamber, and a first pump body arranged on the top of the transfer chamber and used to pump water in the water receiving trough into the transfer chamber.

5. A solid-liquid separation device for recovering lead paste of waste lead-acid batteries according to claim 4, characterized in that: The water inlet assembly includes a water distribution pipe arranged on the top of the filling block and used to drain wastewater to the upper ports of each water storage channel, a barrel filter arranged on one side of the flotation tank and used to pre-treat wastewater, a water inlet pipe arranged at the water outlet of the barrel filter and one end of which is connected to the water distribution pipe, and a second pump body arranged at the water inlet end of the barrel filter.

6. A solid-liquid separation device for recovering lead paste of waste lead-acid batteries according to claim 5, characterized in that: The bubble recovery component includes a sieve plate arranged inside the flotation tank and used for bubbles that have not absorbed particulate matter to rise and pass through, an inclined plate arranged inside the flotation tank, a sealing cover arranged on the top of the flotation tank, a third pump body arranged on the sealing cover and used to inject water into the flotation tank, a plurality of groups of second turbulence holes evenly opened on the top of the inclined plate and used to prevent bubbles from vertically rising, a reflux channel opened on the side wall of the flotation tank and located at the bottom of the inclined plate and close to the sealing cover, a microporous ceramic diffuser plate arranged on the inner side wall of the flotation tank and located close to the reflux channel, a second air inlet pipe arranged on the side wall of the flotation tank and connected to the microporous ceramic diffuser plate, a plurality of groups of reflux tubes respectively arranged on the water distribution pipe and connected to the reflux channel, a plurality of groups of bubble discharge holes arranged on the top of the reflux tube, a plurality of groups of reflux tubes arranged at the bottom of the reflux tube and connected to the water distribution pipe, and a second one-way valve arranged on the reflux tube.

7. A solid-liquid separation device for recovering lead paste of waste lead-acid batteries according to claim 6, characterized in that: The slag cleaning assembly includes two groups of sprockets arranged on the inner wall of the flotation tank through a fourth rotating shaft, a chain arranged between the two sprockets, several groups of push plates arranged on the chains and in contact with the bottom of the screening plate, a receiving plate arranged on the push plates, a slag collecting box arranged on the outer wall of the flotation tank, several groups of bubble breaking thorns arranged inside the slag collecting box, a fifth rotating shaft rotatably arranged inside the slag collecting box, a spoiler arranged on the fifth rotating shaft, a flow block arranged inside the slag collecting box, a water outlet pipe opened on the side wall of the flotation tank, and a slag discharge door hingedly arranged at the bottom of the slag collecting box.

8. The solid-liquid separation equipment for recovering lead paste of waste lead-acid batteries according to claim 7, characterized in that: The first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft work together through a transmission method of a bevel gear set, a belt and a pulley.

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