A defoaming device for a concentrator

Abstract

This invention relates to the field of defoaming devices, and more particularly to a defoaming device for a thickener, comprising: a thickener for containing and settling slurry; a water spray assembly disposed in the upper central region of the thickener for spraying liquid onto the liquid surface inside the thickener to disperse foam on the liquid surface; and two defoaming cylinders, each disposed on the same side of the thickener, with the height of the defoaming cylinders corresponding to the surface position of the liquid inside the thickener, for physically intercepting foam diffusing from the central region to the edge region. The water spray assembly initially disperses most of the foam on the surface of the thickener, and the defoaming cylinders on both sides physically intercept the foam diffusing outwards. Simultaneously, the supernatant is sprayed downwards from the nozzle for targeted hydraulic defoaming, forming a multi-action mechanism of "dispersion-interception-elimination," effectively suppressing foam accumulation.

Description

Technical Field

[0001] This invention relates to the field of defoaming devices, and more particularly to a defoaming device for a concentrator. Background Technology

[0002] Thickeners are widely used solid-liquid separation devices in wet mineral processing. After the flotation pulp enters the thickener, a foam layer often forms on the surface of the supernatant due to residual reagents and pulp flow disturbance. If the foam layer is too thick, it will occupy the space of the clarification zone, affecting the settling efficiency, and some foam with attached mineral particles may be lost with the overflow, resulting in resource loss.

[0003] Currently, common methods for defoaming thickeners include adding defoaming agents and high-pressure water spraying. Adding defoaming agents is costly and may affect subsequent operations, so water spraying is more widely used. For example, Chinese patent CN222901360U discloses a thickener defoaming device that uses a pressurized pump to deliver water to nozzles at the ends of the main and branch pipes for high-pressure water spraying to defoam. This method has a certain effect on dispersing foam in the central area of ​​the thickener, but it lacks further interception and treatment methods for foam that diffuses outwards after being dispersed. The foam may migrate to the vicinity of the overflow tank, affecting the overflow water quality.

[0004] In addition, some existing technologies also use the method of setting bubble-blocking rings or mechanical bubble-breaking components inside the thickener. However, bubble-blocking rings mainly play a passive blocking role and are difficult to effectively remove foam that has accumulated near the bubble-blocking rings. Mechanical bubble-breaking structures are relatively complex and have a limited range of action. Summary of the Invention

[0005] In order to overcome the shortcomings of existing defoaming devices for thickeners, where the foam dispersed by spraying alone tends to spread and migrate outwards, and the lack of effective interception means may lead to foam entering the overflow tank and affecting the overflow water quality, this invention provides a defoaming device for thickeners.

[0006] The technical solution is as follows: A defoaming device for a concentrator, comprising: A thickener is used to hold and settle mineral slurry; A water spray assembly is located in the upper central area inside the thickener and is used to spray liquid onto the liquid surface inside the thickener to disperse the foam on the liquid surface in all directions. Two defoaming cylinders are respectively installed in the same area inside the thickener, and the height of the defoaming cylinders corresponds to the surface position of the liquid inside the thickener, for physically intercepting the foam that diffuses from the central area to the edge area; A nozzle is disposed above the defoaming cylinder, and the nozzle is equipped with a nozzle for spraying liquid onto the foam intercepted by the defoaming cylinder to disperse and eliminate it; A power unit, mounted on the defoaming cylinder, is used to transport the supernatant from the thickener to the nozzle.

[0007] More preferably, the water spray assembly includes: A liquid pump is installed on the thickener, and its inlet end is used to draw the supernatant from the thickener. A delivery pipe is installed above the thickener and connected to the outlet end of the liquid pump. Multiple spray valves are spaced apart on the delivery pipe and are used to spray liquid onto the liquid surface below.

[0008] More preferably, the defoaming cylinder is elongated and extends along the radial direction of the thickener, and the length direction of the nozzle is consistent with the length direction of the defoaming cylinder.

[0009] More preferably, it also includes a feed buffer assembly, which is disposed at the feed inlet of the thickener to reduce the flow rate and impact force of the slurry when it enters the thickener. The feed buffer assembly includes a feed cylinder and a feed pipe. The feed cylinder is disposed in the upper central region inside the thickener. The feed pipe is connected to the feed cylinder and extends outward from the top of the thickener to introduce the slurry. The bottom outlet end of the feed cylinder is lower than the liquid level inside the thickener. The interior of the feed cylinder forms an upper chamber, a middle chamber and a lower chamber that are connected in sequence. The slurry flows through each of the chambers in sequence before entering the thickener.

[0010] More preferably, a slanted wheel is rotatably arranged in the upper chamber of the feed cylinder. The slanted wheel is composed of multiple circumferentially arranged slanted plates, and adjacent slanted plates form independent liquid chambers. A first liquid outlet plate is provided between the upper chamber and the middle chamber. The first liquid outlet plate has a through hole for connecting the upper chamber and the middle chamber. A pusher frame is rotatably arranged in the middle chamber. The pusher frame passes through the first liquid outlet plate and is fixedly connected to the slanted wheel, and rotates synchronously with it to push the slurry downward. A second liquid outlet plate is provided between the middle chamber and the lower chamber. The second liquid outlet plate also has a through hole, and the through hole is staggered in the circumferential position from the through hole on the first liquid outlet plate.

[0011] More preferably, the power assembly includes an impeller, a rotating rod, and a swing assembly. The impeller is rotatably disposed in the feed pipe of the thickener and is driven to rotate by the slurry flow. The rotating rod is rotatably mounted between the two defoaming cylinders and connected to the impeller. The swing assembly is connected between the rotating rod and the nozzle and is used to drive the nozzle to swing back and forth around its axis.

[0012] More preferably, the oscillating component includes: A support shell is fixedly mounted on the defoaming cylinder; A drive disc is mounted on the rotating rod, and the drive disc has an elliptical structure. The lifting frame is slidably disposed within the support shell. The lifting frame has an inner cavity, and the drive disk is located in the inner cavity of the lifting frame and forms a rolling contact with the inner wall of the lifting frame. The lifting frame can perform reciprocating lifting motion under the push of the drive disk. A lever is positioned between the nozzle and the lifting frame. One end of the lever is fixedly connected to the nozzle. A horizontal groove is provided on the lifting frame. The other end of the lever is inserted into the horizontal groove and can slide therein. This lever is used to convert the lifting motion of the lifting frame into the reciprocating oscillation of the nozzle.

[0013] More preferably, the feed buffer assembly further includes a diversion plate disposed at the outlet end of the feed cylinder. The top surface of the diversion plate has a conical inclined structure for diverting the slurry in a circumferential direction. Multiple guide grooves are spaced apart on the top surface of the diversion plate in a circumferential direction.

[0014] More preferably, it also includes a stirring assembly, which is disposed inside the thickener and is used to scrape off solid material adhering to its bottom inner wall. The stirring assembly includes a reducer, a rotating shaft, and a stirring paddle. The reducer is mounted on top of the thickener, and the rotating shaft is connected to the output end of the reducer. The thickener has an inverted conical bucket structure at the bottom, and the bottom of the inverted conical bucket has an underflow port. The stirring paddle is fixedly connected to the outside of the rotating shaft. The stirring paddle has a triangular structure, and its outer wall is attached to the inner wall of the inverted conical bucket of the thickener.

[0015] More preferably, the stirring assembly further includes a flow control block, which is assembled at the bottom end of the rotating shaft. The flow control block has a pointed cone structure that is wider at the top and narrower at the bottom. Its outer wall forms a gap rotational fit with the inner wall of the bottom of the inverted conical bucket of the thickener, which is used to control the discharge flow rate of the underflow outlet.

[0016] The beneficial effects are as follows: 1. The water spray component initially disperses most of the foam on the surface of the thickener, and then the defoaming cylinders on both sides physically intercept the foam that spreads to the periphery. At the same time, the supernatant is sprayed downwards by the spray pipe for targeted hydraulic defoaming, forming a multi-action mechanism of "dispersion-interception-elimination", which effectively inhibits foam accumulation.

[0017] 2. The slurry is buffered step by step through the upper, middle and lower chambers of the feed cylinder. Combined with the conical guide and circumferential diversion of the diversion plate, the jet impact force when the slurry enters the thickener is significantly reduced. This reduces the amount of foam caused by violent disturbance of the slurry from the source and provides stable feeding conditions for subsequent sedimentation and separation.

[0018] 3. The swing assembly, through the cooperation of the drive plate and the lifting frame, converts the rotational motion of the rotating rod into the reciprocating swing of the nozzle, so that the spray angle of the nozzle continuously changes, effectively expanding the coverage area of ​​the supernatant spray, avoiding the defoaming blind spots caused by the fixed spraying method, and improving the comprehensiveness of the defoaming operation.

[0019] 4. The stirring paddle in the mixing assembly rotates against the inner wall of the inverted conical hopper, which can scrape off the attached solids and destroy the stable floc structure, improving the flowability of the underflow; at the same time, the flow control block and the underflow port form a gap fit, which can help adjust the discharge flow rate, ensuring that the underflow slurry is discharged at a uniform and stable rate, avoiding blockage. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the support frame, defoaming cylinder, and liquid pump of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the liquid pump, delivery pipe, and spray valve pipe.

[0023] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the feed cylinder, feed pipe, and defoaming cylinder.

[0024] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the inclined wheel, the first liquid outlet plate, and the diversion plate.

[0025] Figure 6 This is a three-dimensional structural diagram of the components of the present invention, including the liquid outlet plate, the push frame, and the second liquid outlet plate.

[0026] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, such as the speed reducer, rotating shaft, and stirring paddle.

[0027] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, such as the rotating rod, impeller, and support shell.

[0028] Figure 9 This is a three-dimensional structural diagram of the nozzle, impeller, and lifting frame of the present invention.

[0029] Figure 10 This is a three-dimensional structural diagram of the lifting frame, drive plate, and cross groove of the present invention.

[0030] Figure 11 This is a three-dimensional structural diagram of the liquid storage cylinder, reciprocating screw, and piston block of the present invention.

[0031] Figure 12This is a three-dimensional structural diagram of the drive disc, transverse groove, and lever components of the present invention.

[0032] The above-mentioned figures include the following reference numerals: 1_thickener, 101_support platform, 102_overflow trough, 103_drain valve pipe, 104_support frame, 105_defoaming cylinder, 106_one-way outlet pipe, 107_spray nozzle, 108_controller, 201_liquid pump, 202_transfer pipe, 203_spray valve pipe, 301_feed cylinder, 302_feed pipe, 303_slanted wheel, 304_first outlet plate, 305_push Frame, 306_Second outlet plate, 307_Diverter plate, 401_Outer shell, 402_Rotor, 403_Impeller, 404_Reservoir, 405_Reciprocating screw, 406_Piston block, 407_One-way inlet pipe, 408_Air hole, 501_Reducer, 502_Rotor shaft, 503_Agitator, 504_Flow control block, 601_Support shell, 602_Lifting frame, 603_Drive plate, 604_Horizontal groove, 605_Lever. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example: A defoaming device for a concentrator, such as... Figures 1-12As shown, the system includes a thickener 1, a support platform 101, an overflow trough 102, a drain valve pipe 103, a support frame 104, a defoaming cylinder 105, a one-way outlet pipe 106, a spray pipe 107, a controller 108, a water spray assembly, a feed buffer assembly, and a power assembly. The thickener 1 is a barrel-shaped structure with an open top and an inverted conical hopper at the bottom. After the flotation slurry enters the thickener 1, the denser solid particles in the slurry settle under gravity in the inverted conical hopper area at the bottom of the thickener 1. The bottom of the inverted conical hopper is provided with a bottom flow outlet for discharging the concentrated bottom flow solid material. An overflow trough 10 is fixedly installed circumferentially on the upper side of the thickener 1. 2. The height of the overflow tank 102 is lower than the top edge of the thickener 1 so that the supernatant overflows into the overflow tank 102 first. A drain valve pipe 103 is connected to and communicates with the upper right side wall of the thickener 1, corresponding to the position of the inner cavity of the overflow tank 102, for discharging the supernatant in the overflow tank 102. A valve is installed on the drain valve pipe 103 to control its opening and closing. A support platform 101 is horizontally mounted on the thickener 1 by bolts. A controller 108 is mounted on the right side of the inside of the support platform 101 by bolts. Support frames 104 are fixedly connected to the front and rear sides of the right side of the support platform 101, and the support frames 104 are correspondingly set in the upper right side area of ​​the inner cavity of the thickener 1. In each support frame 104, a defoaming cylinder 105 is fixedly connected to its bottom. The height of the defoaming cylinder 105 corresponds to the surface of the supernatant in the thickener 1. A one-way outlet pipe 106 is fixedly connected through the top outer side of the defoaming cylinder 105. A spray pipe 107 is rotatably connected to the upper end of the one-way outlet pipe 106. The inner end of the spray pipe 107 is rotatably connected to the inner end of the corresponding defoaming cylinder 105. Multiple nozzles are spaced along the length of the bottom of the spray pipe 107. The one-way outlet pipe 106 is a one-way flow structure, allowing only the supernatant to enter the spray pipe 107 through the one-way outlet pipe 106 and preventing backflow of liquid. The defoaming cylinder 105 is equipped with... A power unit is provided to pump the supernatant into the one-way outlet pipe 106. When the foam in the supernatant in the thickener 1 flows to the area where the defoaming cylinder 105 is located, the defoaming cylinder 105 intercepts the foam. At the same time, the supernatant is sprayed downward through the nozzle 107 to act on the surface of the supernatant to disperse and eliminate the surface foam. A water spraying component is provided at the bottom of the support platform 101 to continuously spray liquid downward along the left and right direction to achieve the initial elimination of most of the foam on the surface of the thickener 1. When the foam flows outward, it is intercepted by the defoaming cylinder 105 and further defoamed. A feed buffer component is provided at the middle position of the bottom of the support platform 101.

[0035] like Figure 2 and Figure 3As shown, the water spray assembly includes a pump 201, a delivery pipe 202, and a spray valve pipe 203. A delivery pipe 202 is horizontally fixedly connected to the front and rear sides of the bottom of the support platform 101. Multiple spray valve pipes 203 are equidistantly connected to the bottom of the two delivery pipes 202 along their length direction. Each spray valve pipe 203 is equipped with a switch valve for independently controlling the opening and closing of the corresponding spray valve pipe 203. The pump 201 is bolted to the front and rear sides of the bottom of the support platform 101 at the positions corresponding to each delivery pipe 202. The inlet end of the pump 201 extends into the inner cavity of the thickener 1 and is located below the supernatant liquid level. The outlet end of the pump 201 is connected to and communicates with the corresponding delivery pipe 202. The two pumps 201 are arranged on the left and right sides respectively, and do not interfere with each other during pumping operations. The pump 201 is electrically connected to the controller 108.

[0036] like Figures 2-6 As shown, the feed buffer assembly includes a feed cylinder 301, a feed pipe 302, a swashplate 303, a first liquid outlet plate 304, a pusher frame 305, and a second liquid outlet plate 306. The feed cylinder 301 is fixedly connected to the bottom center of the support platform 101. The bottom height of the feed cylinder 301 is lower than the liquid surface area of ​​the supernatant in the thickener 1. The inner cavity of the feed cylinder 301 is divided into an upper chamber, a middle chamber, and a lower chamber. The swashplate 303 is rotatably mounted in the upper chamber. The swashplate 303 consists of multiple circumferentially arranged... The thickener is composed of inclined plates, with adjacent inclined plates forming independent liquid chambers. A feed pipe 302 is connected to the right side wall of the feed cylinder 301. The left end of the feed pipe 302 communicates with the upper chamber of the feed cylinder 301. The feed pipe 302 extends outward from the right side of the top surface of the thickener 1 to introduce the flotation slurry. A first outlet plate 304 is fixedly connected to the upper chamber below the inclined wheel 303. A through hole is provided on the first outlet plate 304 corresponding to the position of an independent liquid chamber to connect to the feed cylinder 301. The upper chamber and middle chamber of the feed cylinder 301 are connected to a pusher frame 305 rotatably. The pusher frame 305 consists of multiple push rods distributed circumferentially. The pusher frame 305 passes through the first liquid outlet plate 304 and is fixedly connected to the inclined wheel 303 to achieve synchronous rotation of the two. A second liquid outlet plate 306 is fixedly connected inside the feed cylinder 301 below the pusher frame 305. The second liquid outlet plate 306 also has a through hole, and this through hole is connected to the first liquid outlet plate 304. The through holes on 04 are staggered in the circumferential position. The lower chamber of the feed cylinder 301 has an open bottom structure. The slurry is directly discharged into the thickener 1 through the lower chamber. The slurry flows through the upper chamber, middle chamber and lower chamber in sequence, which effectively reduces the injection pressure of the slurry and avoids excessive foaming due to direct and rapid discharge. At the same time, the bottom height of the feed cylinder 301 is lower than the liquid surface area of ​​the supernatant in the thickener 1, which can prevent the discharged slurry from overflowing directly and provide sufficient settling time for the slurry.

[0037] like Figure 4 , Figure 5 and Figures 7-11 As shown, the power assembly includes a housing 401, a rotating rod 402, an impeller 403, a liquid storage tank 404, a reciprocating screw 405, a piston block 406, and a one-way inlet pipe 407. The housing 401 is connected and communicates with the body of the feed pipe 302. The rotating rod 402 is rotatably connected to the housing 401 in a front-to-back direction. The impeller 403 is fixedly connected to the middle of the rotating rod 402 at a position corresponding to the inner cavity of the housing 401. The front and rear ends of the rotating rod 402 rotatably penetrate the corresponding sides. Inside each defoaming cylinder 105, a liquid storage cylinder 404 is fixedly connected along its length. A reciprocating screw 405 is rotatably connected along the length of each liquid storage cylinder 404. The two ends of a rotating rod 402 extend into the corresponding liquid storage cylinder 404 and are fixedly connected to the corresponding reciprocating screw 405. A piston block 406 is threaded onto each reciprocating screw 405. A clearance-sealed sliding fit is formed between the outer wall of the piston block 406 and the inner wall of the liquid storage cylinder 404, allowing for... The piston block 406 pushes the supernatant in the storage cylinder 404. Each defoaming cylinder 105 has a one-way inlet pipe 407 connected to its bottom corresponding to the one-way outlet pipe 106. The wall of the one-way inlet pipe 407 penetrates the defoaming cylinder 105 and communicates with the inner cavity of the thickener 1. The one-way inlet pipe 407 has a one-way flow structure, allowing only the supernatant in the thickener 1 to enter the storage cylinder 404 through the one-way inlet pipe 407, and preventing backflow of liquid. A filter screen is installed at the bottom port of the inlet pipe 407 to prevent foam in the supernatant from entering the one-way inlet pipe 407. The area inside the storage cylinder 404 corresponding to the one-way outlet pipe 106 is the liquid chamber, that is, the area outside the piston block 406. The area inside the storage cylinder 404 away from the one-way outlet pipe 106 is the balance chamber, that is, the area inside the piston block 406. An air hole 408 is opened on the inner side of the top of the storage cylinder 404 corresponding to the position of the balance chamber to balance the air pressure in the balance chamber.

[0038] like Figures 3-6 As shown, the feed buffer assembly also includes a diversion plate 307. The diversion plate 307 is fixedly connected to the bottom of the feed cylinder 301 at a position where there is a working gap between it and the lower chamber. The top surface of the diversion plate 307 is a conical inclined structure, and multiple guide grooves are opened at intervals along the circumference of the top surface of the diversion plate 307. The slurry discharged downward through the lower chamber of the feed cylinder 301 falls onto the surface of the diversion plate 307, and is then diverted along the conical inclined surface and guide grooves of the diversion plate 307 before being discharged into the inner cavity of the thickener 1, so as to further mitigate the impact force when the slurry is discharged. The guide grooves play a role in guiding and diverting the slurry.

[0039] When this device is put into use, the flotation slurry is injected into the upper chamber of the feed cylinder 301 through the feed pipe 302. The flow of the slurry drives the swash plate 303 to rotate, causing the slurry to enter each independent liquid chamber of the swash plate 303 one by one. The swash plate 303 rotates under the push of the slurry, and the slurry in the independent liquid chamber corresponding to the through hole on the first liquid outlet plate 304 enters the middle chamber of the feed cylinder 301, so that the slurry in each independent liquid chamber is discharged into the middle chamber in sequence. The pusher frame 305 moves with the swash plate 303. As the machine rotates, the slurry, propelled circumferentially by the pusher 305, flows through the through-hole of the second outlet plate 306 into the lower chamber, eventually falling onto the surface of the distribution plate 307. It then flows evenly circumferentially along its conical slope and guide groove, slowly discharging into the inner cavity of the thickener 1. During this process, the slurry flows sequentially through the upper chamber, middle chamber, and lower chamber, and is buffered by the distribution plate 307, effectively reducing the injection pressure and preventing excessive foaming caused by direct and rapid discharge of the slurry.

[0040] When the slurry enters the thickener 1, the denser solid particles gradually settle under gravity in the inverted conical hopper area at the bottom of the thickener 1, forming a high-concentration underflow slurry that is discharged through the underflow port. The underflow port is connected to an external collection mechanism, and the opening and closing and flow rate of the underflow port are controlled by an external underflow pump to ensure that the lower layer of solid mud is continuously and uniformly discharged during the operation. The liquid in the upper layer is relatively clear, forming overflow water that gradually overflows into the circumferentially set overflow trough 102. At the same time, the bottom of the feed cylinder 301 is lower than the liquid surface area of ​​the supernatant in the thickener 1, which can effectively prevent the newly injected slurry from overflowing directly and provide sufficient settling time for the slurry. As the overflow water level rises, the external hose is connected to the drain valve pipe 103, and the valve of the drain valve pipe 103 is opened to accurately discharge the supernatant into a designated collection container or to the next process.

[0041] Before the device is put into operation, the switch valves of each spray valve pipe 203 are opened in advance. After the device is started, the water spray assembly is started through the controller 108, and the two pumps 201 start working, pumping the supernatant in the thickener 1 to the corresponding delivery pipes 202, and then continuously spraying liquid onto the surface of the supernatant in the left and right directions through each spray valve pipe 203, thereby achieving the initial dispersal and elimination of most of the foam on the surface of the thickener 1. When the dispersed foam flows outward, it is intercepted by the defoaming cylinders 105 on both sides for subsequent targeted defoaming treatment. At the same time as the water spray assembly is working, the power assembly is started synchronously. During the process of the slurry being injected into the feed cylinder 301 through the feed pipe 302, some of the slurry simultaneously enters the outer shell 401 connected to and communicating with the feed pipe 302, pushing the impeller 403 inside to rotate. The impeller 403 drives the rotating rod 402 to rotate. The two ends drive the reciprocating screws 405 in the corresponding liquid storage cylinders 404 to rotate, thereby driving the piston block 406 threadedly connected to the reciprocating screws 405 to reciprocate along the inner cavity of the liquid storage cylinder 404. When the piston block 406 moves away from the one-way liquid outlet pipe 106, the supernatant in the thickener 1 is drawn into the liquid cavity of the liquid storage cylinder 404 through the one-way liquid inlet pipe 407. When the piston block 406 moves closer to the one-way liquid outlet pipe 106, the supernatant in the liquid cavity of the liquid storage cylinder 404 is pushed into the nozzle 107 through the one-way liquid outlet pipe 106. The multiple nozzles at the bottom of the nozzle 107 then spray the supernatant downwards. At the same time, the balance chamber draws in or discharges air through the air hole 408 to maintain the pressure balance in the chamber. This cycle repeats, and the nozzle 107 continuously sprays liquid onto the surface of the supernatant, working in conjunction with the defoaming cylinder 105 to continuously intercept and eliminate foam on the surface of the supernatant.

[0042] Throughout the defoaming process, the defoaming cylinder 105 is fixed to the upper right side of the thickener 1 via the support frame 104. Its height corresponds to the surface of the supernatant. When the foam flows to the area where the defoaming cylinder 105 is located, it is first physically intercepted by the cylinder structure of the defoaming cylinder 105. At the same time, the supernatant sprayed downward from both sides of the defoaming cylinder 105 by the nozzle 107 continuously impacts the surface of the supernatant, further dispersing and eliminating the accumulated foam. The one-way flow structure of the one-way outlet pipe 106 and the one-way inlet pipe 407 ensures directional liquid delivery and avoids backflow interference. In addition, the supernatant in the overflow tank 102 is stably discharged through the drain valve pipe 103, maintaining a stable liquid level in the thickener 1 and providing a good liquid surface environment for the defoaming operation.

[0043] like Figure 8 , Figure 9 , Figure 10 and Figure 12As shown, it also includes a swing assembly mounted on the defoaming cylinder 105. The swing assembly includes a support shell 601, a lifting frame 602, a drive disc 603, and a lever 605. The two defoaming cylinders 105 are connected to the support shell 601 on the side closest to each other by screws. The rotating rod 402 rotates through the support shell 601. The drive disc 603 is fixedly connected to the rotating rod 402 at the position corresponding to the inner cavity of the two support shells 601. The drive disc 603 has an elliptical structure with a protruding part and a flat part. Each support shell 601 has A lifting frame 602 is vertically slidably connected. The lifting frame 602 has a square inner cavity. The inner wall of the lifting frame 602 forms a rolling contact with the outer peripheral wall of the drive disc 603. The upper end of the lifting frame 602 vertically slides through the top of the support shell 601 and extends to the outside. A transverse groove 604 is provided on the upper side of the lifting frame 602. A lever 605 is fixedly connected to the inner end of the spray pipe 107 on both defoaming cylinders 105. The lower end of the lever 605 is movably engaged with the transverse groove 604 on the corresponding side of the lifting frame 602.

[0044] When the rotating rod 402 in the power assembly is driven by the impeller 403 to rotate continuously, the rotating rod 402 synchronously drives the two drive discs 603 to rotate in the inner cavity of their respective support shells 601. Since the drive disc 603 has an elliptical structure, its outer peripheral wall always maintains rolling contact with the inner wall of the lifting frame 602. As the drive disc 603 rotates, the radial dimension of its outer contour changes periodically. When the protrusion gradually contacts and pushes the upper inner wall of the lifting frame 602, the flat part rotates to the lower inner wall of the lifting frame 602, causing the lifting frame 602 to be pushed upward and slide vertically upward along the support shell 601. When the protrusion rotates towards the lower inner wall of the lifting frame 602, and the flat part rotates to contact the upper inner wall of the lifting frame 602, the lifting frame 602 falls downward under the action of gravity. This process repeats. For each rotation of the rotating rod 402, the drive disc 603 drives the lifting frame 602 to complete one complete up-and-down movement. During the reciprocating motion, the horizontal groove 604 of the lifting frame 602 and the lever 605 form a movable locking engagement. When the lifting frame 602 moves up and down, the horizontal groove 604 moves up and down synchronously with it, and applies a horizontal component force to the lever 605 through the groove wall, forcing the lever 605 to slide in the horizontal groove 604 and drive the nozzle 107 to swing back and forth in the left and right directions around the connecting axis of the defoaming cylinder 105 and the one-way liquid outlet pipe 106. The nozzle 107 then drives the multiple nozzles set at its bottom to swing synchronously, changing the original vertical downward spray of the supernatant into a dynamic spray direction of alternating left and right. This swinging process is completely synchronized with the rotation rhythm of the rotating rod 402, thereby ensuring that while the nozzle 107 continuously sprays defoaming liquid, its spray coverage area changes continuously in the horizontal direction, effectively expanding the defoaming area, avoiding the defoaming dead angle caused by a fixed spray angle, and significantly improving the effect of dispersing and eliminating foam on the surface of the supernatant.

[0045] like Figures 3-7As shown, it also includes a stirring assembly installed inside the thickener 1. The stirring assembly includes a reducer 501, a rotating shaft 502, a stirring paddle 503, and a flow control block 504. The reducer 501 is bolted to the center of the support platform 101. The reducer 501 is electrically connected to the controller 108. The rotating shaft 502 is fixedly connected to the output end of the reducer 501. The reducer 501 is a multi-stage planetary gear reducer. Its internal two-stage planetary gear mechanism reduces the high-speed rotation of the motor step by step, ultimately obtaining ultra-high torque and extremely low speed at the output end. The rotating shaft 502 rotates vertically through the support platform 101 and continues to rotate downwards through the feed cylinder 301, the slant wheel 303, and the first liquid outlet plate 3. 04. The push frame 305, the second liquid outlet plate 306, and the diverter plate 307 are independent of each other and do not interfere with the rotation of the inclined wheel 303 and the push frame 305. The bottom end of the rotating shaft 502 extends to the lowest point of the thickener 1. An agitator 503 is fixedly connected to the outside of the rotating shaft 502. The agitator 503 has a triangular structure and its outer wall is attached to the inner wall of the inverted conical hopper of the thickener 1 to scrape off the solid material adhering to the inner wall. A flow control block 504 is assembled at the bottom end of the rotating shaft 502. The flow control block 504 has a pointed cone structure that is wider at the top and narrower at the bottom. Its outer wall forms a gap rotational fit with the inner wall of the bottom of the inverted conical hopper of the thickener 1 to control the discharge flow rate of the bottom outlet and not to obstruct the normal passage of solid material.

[0046] During the operation of the thickener 1, the operating controller 108 synchronously starts the reducer 501. The reducer 501 reduces the high-speed input step by step through its internal planetary gear mechanism, outputting ultra-high torque and extremely low speed to the rotating shaft 502, thereby driving the rotating shaft 502 to rotate at a low speed. The stirring paddle 503 rotates synchronously with the rotating shaft 502. During the rotation, it continuously scrapes off the solid particles adhering to the inner wall of the inverted conical hopper, preventing the material from accumulating and caking. At the same time, the mechanical shearing force generated by the rotation of the stirring paddle 503 can effectively break down the overly stable floc structure and release the flocs. The internally encapsulated moisture improves the rheological properties of the underflow slurry, prevents blockage, and provides auxiliary conditions for the smooth flow of high-concentration underflow slurry to the bottom, facilitating its stable discharge through the underflow outlet. At the same time, the flow control block 504 rotates together with the rotating shaft 502. Utilizing the precise gap between its top-wide and bottom-narrow pointed cone shape and the inner wall of the inverted cone-shaped hopper bottom, the flow rate of the slurry at the underflow outlet is dynamically controlled, ensuring that the underflow is discharged at a uniform and stable rate. Furthermore, the rotational motion of the flow control block 504 itself helps solid particles pass through smoothly without causing additional obstruction to the discharge.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A defoaming device for a concentrator, characterized in that, include: Thickener (1), used to contain and settle slurry; The water spray assembly is located in the upper central area inside the thickener (1) and is used to spray liquid onto the liquid surface inside the thickener (1) to disperse the foam on the liquid surface in all directions. Two defoaming cylinders (105) are respectively set in the same area inside the thickener (1), and the setting height of the defoaming cylinders (105) corresponds to the surface position of the liquid surface inside the thickener (1), which are used to physically intercept the foam that diffuses from the central area to the edge area. A nozzle (107) is disposed above the defoaming cylinder (105). The nozzle (107) is provided with a nozzle for spraying liquid onto the foam intercepted by the defoaming cylinder (105) to disperse and eliminate it. A power unit, located on the defoaming cylinder (105), is used to transport the supernatant in the thickener (1) to the nozzle (107).

2. A defoaming device for a concentrator according to claim 1, characterized in that, The water spray assembly includes: A liquid pump (201) is installed on the thickener (1), and its inlet end is used to draw the supernatant in the thickener (1); The delivery pipe (202) is located above the thickener (1) and connected to the outlet end of the liquid pump (201); Multiple spray valves (203) are spaced apart on the delivery pipe (202) and are used to spray liquid onto the liquid surface below.

3. A defoaming device for a concentrator according to claim 2, characterized in that, The defoaming cylinder (105) is elongated and extends in the radial direction of the thickener (1). The length direction of the nozzle (107) is consistent with the length direction of the defoaming cylinder (105).

4. A defoaming device for a concentrator according to claim 3, characterized in that, It also includes a feed buffer assembly, which is located at the feed inlet of the thickener (1) to reduce the flow rate and impact force of the slurry when it enters the thickener (1). The feed buffer assembly includes a feed cylinder (301) and a feed pipe (302). The feed cylinder (301) is located in the upper central area inside the thickener (1). The feed pipe (302) is connected to the feed cylinder (301) and extends outward to the top of the thickener (1) to introduce the slurry. The bottom outlet end of the feed cylinder (301) is lower than the liquid level inside the thickener (1). The interior of the feed cylinder (301) forms an upper chamber, a middle chamber and a lower chamber that are connected in sequence. The slurry flows through each of the chambers in sequence and then enters the thickener (1).

5. A defoaming device for a concentrator according to claim 4, characterized in that, The upper chamber of the feed cylinder (301) is rotatably equipped with a slanted wheel (303), which is composed of multiple slanted plates arranged circumferentially. Adjacent slanted plates form independent liquid chambers. A first liquid outlet plate (304) is provided between the upper chamber and the middle chamber. The first liquid outlet plate (304) has a through hole for connecting the upper chamber and the middle chamber. A pusher frame (305) is rotatably equipped in the middle chamber. The pusher frame (305) passes through the first liquid outlet plate (304) and is fixedly connected to the slanted wheel (303), and rotates synchronously with it to push the slurry downward. A second liquid outlet plate (306) is provided between the middle chamber and the lower chamber. The second liquid outlet plate (306) also has a through hole, and the through hole is staggered in the circumferential position from the through hole on the first liquid outlet plate (304).

6. A defoaming device for a concentrator according to claim 5, characterized in that, The power assembly includes an impeller (403), a rotating rod (402), and a swing assembly. The impeller (403) is rotatably disposed in the feed pipe (302) of the thickener (1) and is driven to rotate by the slurry flow. The rotating rod (402) is rotatably mounted between the two defoaming cylinders (105) and connected to the impeller (403). The swing assembly is connected between the rotating rod (402) and the nozzle (107) and is used to drive the nozzle (107) to swing back and forth around its axis.

7. A defoaming device for a concentrator according to claim 6, characterized in that, The swing component includes: A support shell (601) is fixedly mounted on the defoaming cylinder (105); A drive disk (603) is disposed on the rotating rod (402), and the drive disk (603) has an elliptical structure; The lifting frame (602) is slidably disposed within the support shell (601). The lifting frame (602) has an inner cavity. The drive disk (603) is located in the inner cavity of the lifting frame (602) and forms a rolling contact with the inner wall of the lifting frame (602). The lifting frame (602) can reciprocate lifting motion under the push of the drive disk (603). A lever (605) is disposed between the nozzle (107) and the lifting frame (602). One end of the lever (605) is fixedly connected to the nozzle (107). A transverse groove (604) is provided on the lifting frame (602). The other end of the lever (605) is inserted into the transverse groove (604) and can slide therein. It is used to convert the lifting motion of the lifting frame (602) into the reciprocating swing of the nozzle (107).

8. The defoaming device for a concentrator according to claim 7, characterized in that, The feed buffer assembly also includes a diversion plate (307) disposed at the outlet end of the feed cylinder (301). The top surface of the diversion plate (307) is a conical inclined structure, which is used to divert the slurry in the circumferential direction. Multiple guide grooves are opened at intervals along the circumferential direction on the top surface of the diversion plate (307).

9. A defoaming device for a concentrator according to claim 8, characterized in that, It also includes a stirring assembly, which is located inside the thickener (1) and is used to scrape off the solid material attached to the bottom inner wall. The stirring assembly includes a reducer (501), a rotating shaft (502) and a stirring paddle (503). The reducer (501) is mounted above the thickener (1), and the rotating shaft (502) is connected to the output end of the reducer (501). The thickener (1) has an inverted cone-shaped bucket structure at the bottom. The bottom of the inverted cone-shaped bucket has a bottom outlet. The stirring paddle (503) is fixedly connected to the outside of the rotating shaft (502). The stirring paddle (503) has a triangular structure and its outer wall is attached to the inner wall of the inverted cone-shaped bucket of the thickener (1).

10. A defoaming device for a concentrator according to claim 9, characterized in that, The stirring assembly also includes a flow control block (504), which is mounted on the bottom end of the rotating shaft (502). The flow control block (504) has a pointed cone structure that is wider at the top and narrower at the bottom. Its outer wall forms a gap rotational fit with the inner wall of the bottom of the inverted cone-shaped bucket of the thickener (1) to control the discharge flow rate of the underflow port.

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