An immersion foam separation, capture and elimination device

Abstract

This invention discloses an immersion-type foam separation, collection, and elimination device. A foam collection component floats on the surface of a thickening tank, separating and collecting foam from the tank surface to a foam breaking component. The foam breaking component breaks the collected foam into small pieces and sends them into the foam separation and elimination component. A water-retaining ring in the foam separation and elimination component fluctuates according to the water level in the suction ring, reducing the amount of water entering the component. Simultaneously, a drainage component ensures that the water level in the suction ring is always lower than the water level in the thickening tank. Water carrying foam flows into the foam separation and elimination component, with most of the liquid leaking into the suction ring from the first hole of the foam collecting hopper. The foam is separated by the second hole of the foam collecting hopper and enters a defoaming tank. In the defoaming tank, the foam is defoamed and reduced to slurry, flowing to the outlet of the defoaming tank, where it is then sucked away by the drainage component and discharged back into the thickening tank along with the water. This invention has the advantages of low cost and applicability to large-size thickeners for large-scale elimination of three-phase foam.

Description

Technical Field

[0001] This invention relates to the field of foam elimination technology, and more particularly to an immersion foam separation, collection and elimination device. Background Technology

[0002] Mineral processing plants commonly use thickeners to concentrate flotation concentrates and tailings. The ultra-stable froth generated during flotation accumulates on the thickener for extended periods, failing to settle effectively. This froth layer contains a large amount of concentrate; if not effectively recovered, it will result in significant concentrate loss through overflow.

[0003] Currently, common defoaming methods used in thickeners at mineral processing plants include spray defoaming, chemical defoaming, and high-pressure water defoaming. Spray defoaming uses water to dilute the foam while eliminating it through the gravity of droplets or water flow. Its disadvantages include high water consumption, poor effectiveness against viscous foam, and reduced thickener efficiency due to the large amount of water added. Chemical defoaming involves spraying chemicals onto the thickener to alter foam tension, causing it to break down. Its disadvantages include high cost and the potential adverse effects of newly added chemicals on upstream and downstream production operations. High-pressure water defoaming uses high-pressure water from atomizing nozzles to impact and dilute the foam, causing it to break. Its disadvantages include weak impact force from high-pressure atomized water on the foam, resulting in low defoaming efficiency.

[0004] Some mineral flotation systems use defoaming tanks. The collected foam is first fed into the defoaming tank, and then the foam is sucked in by vacuuming through an inverted chamber. The defoaming is achieved through a combination of measures such as creating negative pressure with an air extraction system, stirring, and spraying. After defoaming, the material is conveyed to a thickener. This type of defoaming tank is suitable for handling foamed materials after the flotation process in mineral processing plants. However, during the feeding process, foaming may occur again due to impact and the addition of frothers and collectors in the mineral processing stage. Therefore, it cannot be used to solve the problem of foam accumulation on the thickener.

[0005] To address the technical problem of foam accumulation, Chinese Patent Publication No. CN 118949490 B discloses a foam collection and elimination device. This device includes a foam collection mechanism and a foam elimination mechanism. The foam collection mechanism transports the collected foam to the foam elimination mechanism for elimination. The foam collection mechanism is mounted on the foam elimination mechanism. The foam-digging bucket includes a rotating shaft, a bucket body, a protective cylinder, and multiple foam-digging units located within the bucket body. When the foam-digging units of the foam collection mechanism rotate relative to the rotating shaft, the first scraper of the foam-digging unit cuts the foam. Simultaneously, the foam enters the foam receiving cavity and is transported to the foam outlet under the rotation of the foam-digging unit. From the foam outlet, it enters the foam inlet channel of the foam elimination mechanism for defoaming. This device is only suitable for thickeners with small diameters. For large-diameter thickeners, this defoaming device can only collect and eliminate nearby ultra-stable foam, and cannot remove large areas of ultra-stable foam on the pool surface, resulting in a limited foam elimination area. Chinese patent document publication number CN118925297B discloses a foam elimination equipment and system, which adopts the foam collection and elimination device disclosed in CN 118949490 B. It sets up a circumferential track and an R-axis track on the thickening tank. Theoretically, it can achieve large-area foam cleaning. However, in application, the applicant found that when applied to large-size thickeners (diameter greater than 40m), the required track is very long. The production cost of straight tracks with a track span of more than 20m and no intermediate support is high. Many existing materials do not meet the strength requirements for stable operation, which limits the large-scale promotion. Based on this, the present invention provides equipment that is suitable for large-size thickeners and can stably eliminate foam over a large area. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a low-cost, submersible foam separation, collection and elimination equipment suitable for large-size thickeners to eliminate three-phase foam over a wide range.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An immersion foam separation, collection, and elimination device includes a foam separation and elimination component, a foam collection component, a foam breaking component, and a drainage component. The foam collection component scrapes foam to the foam breaking component for breaking. The broken foam enters the foam separation and elimination component for foam and water separation. The separated water is discharged by the drainage component. The foam collection component floats on the surface of the thickening tank. The foam breaking component includes multiple rotatable bubble grids. The foam separation and elimination component is located within the area enclosed by the multiple bubble grids.

[0009] The foam separation and elimination component includes a water-absorbing ring, a water-blocking ring, a foam-collecting hopper, and a defoaming barrel. The water-absorbing ring is sleeved on the outer peripheral wall of the defoaming barrel and has an opening at its upper part. The inner cavity of the water-absorbing ring is connected to a drainage component. The water-blocking ring is located at the opening above the water-absorbing ring and can float up and down relative to the water-absorbing ring. The upper and lower parts of the defoaming barrel are respectively provided with a feed inlet and a discharge outlet. One end of the foam-collecting hopper is connected to the inner wall of the water-blocking ring, and the other end extends into the defoaming barrel. The foam-collecting hopper has multiple first holes for water to pass through at one end near the water-blocking ring. The first holes are located outside the defoaming barrel and communicate with the inner cavity of the water-absorbing ring. The foam-collecting hopper has a second hole for foam to pass through at the upper inner side of the defoaming barrel. The second hole is connected to the defoaming barrel.

[0010] As a further improvement to the above technical solution:

[0011] The defoaming tank includes a tank body and a dispersion disc located inside the tank body. The dispersion disc is rotatable relative to the tank body and is used to eliminate foam inside the tank body. The inlet and outlet are located on the tank body.

[0012] The dispersion disc is horizontally positioned between the inlet and outlet, and a channel is provided between the dispersion disc and the inner wall of the barrel to facilitate the movement of foam from top to bottom.

[0013] The upper surface of the dispersion disk is provided with protrusions; the protrusions are spiral or arc-shaped.

[0014] The protrusion extends from the center of the dispersion disk towards the circumference. The height of the protrusion near the center of the dispersion disk is L1, and the height of the protrusion near the circumference of the dispersion disk is L2, satisfying L2≥L1.

[0015] The foam separation and elimination component further includes a first driving assembly, which includes a first rotating shaft and a first driving member. The first rotating shaft is connected to a dispersion disk, and the first driving member is used to drive the first rotating shaft to rotate.

[0016] The foam breaking assembly includes a rotating foam scraper, a foam scraper support, and a foam scraper drive. The rotating foam scraper is supported on the foam scraper support. The rotating foam scraper includes a second rotating shaft and a grid located on the second rotating shaft. The foam scraper drive is used to drive the second rotating shaft to rotate, so as to drive the grid to break the foam.

[0017] The drainage component includes a submersible pump, a venturi tube, a first connecting pipe, and a second connecting pipe. The inlet end of the submersible pump is connected to the inner cavity of the suction ring through the first connecting pipe. The branch suction inlet end of the venturi tube is connected to the outlet of the defoaming tank. The inlet end of the venturi tube is connected to the outlet end of the submersible pump through the second connecting pipe. The outlet end of the venturi tube is connected to the outside.

[0018] The foam collection component includes a second drive unit, a float, a foam scraper, a second transmission unit, a rotating arm, and a rotation drive. The foam scraper is slidably mounted on the float, which floats on the surface of the thickening tank. The rotation drive unit drives the rotating arm to rotate, thereby causing the float to rotate around the center of the rotation drive unit to collect foam. The second drive unit drives the foam scraper to slide on the float via the second transmission unit, thereby scraping foam that is far from the foam breaking component to the foam breaking component for breaking.

[0019] The floating block is composed of multiple unit blocks connected together. Each unit block includes a support frame and a foam material block, which is connected to the support frame.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention discloses an immersion-type foam separation, collection, and elimination device. The foam collection component floats on the surface of the thickening tank, separating and collecting the foam from the surface and bringing it to a foam breaking component. This eliminates the need for a linear track to move the foam separation and elimination component, resulting in low production costs. It is suitable for eliminating foam in large-sized thickening tanks. The foam breaking component breaks the collected foam into small pieces and feeds them into the foam separation and elimination component. The water-retaining ring of the foam separation and elimination component fluctuates according to the water level in the suction ring, controlling the amount of water entering the component. This ensures efficient foam entry into the defoaming tank while significantly reducing the amount of water entering. Simultaneously, the drainage component ensures that the liquid level in the suction ring remains lower than the liquid level in the thickening tank. The water flow carries the foam around the suction ring to the foam collection bucket due to the liquid level difference. When the water carrying the foam flows into the foam separation and elimination component, most of the liquid will leak into the suction ring from the first hole of the foam collection bucket due to the superior fluidity of the liquid compared to the foam. The foam will be separated by the second hole of the foam collection bucket and enter the defoaming tank. The first and second holes of the foam collection bucket separate the liquid and the foam. The foam is defoamed in the defoaming tank and reduced to slurry, which flows to the outlet of the defoaming tank and is then sucked away by the drainage component and discharged back to the thickening tank along with the water. This invention collects the foam through a mechanical device and drives it into the foam separation and elimination component with water flow, thus completing the separation of foam and liquid through the difference in fluidity between the foam and the liquid. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0024] Figure 3 yes Figure 1 A structural schematic diagram from another perspective at point A in the middle.

[0025] Figure 4 This is a schematic diagram of the foam separation and elimination component.

[0026] Figure 5 This is the front view of the foam separation and elimination component.

[0027] Figure 6 yes Figure 5 A cross-sectional view along the BB line.

[0028] Figure 7 This is a schematic diagram of the exploded structure of a foam crushing component (partial parts).

[0029] Figure 8 This is a schematic diagram of the water absorption ring.

[0030] Figure 9 This is a structural diagram of the defoaming tank.

[0031] Figure 10 This is a top view of the dispersion disk.

[0032] Figure 11 This is a schematic diagram of the bubble collection chamber.

[0033] Figure 12 This is a schematic diagram of the foam trapping component.

[0034] Figure 13 This is a structural schematic diagram of the foam trapping component (from another perspective).

[0035] Figure 14 This is a structural diagram of the foam separation and elimination component and the drainage component.

[0036] Figure 15 This is a structural diagram of the foam separation and elimination component and the drainage component.

[0037] Figure 16 This is a schematic diagram of the foam trapping component (with some floats removed).

[0038] Figure 17 yes Figure 16 A magnified view of a section at point C.

[0039] Figure 18 This is a structural diagram of the foam trapping component (with some floats removed, another view).

[0040] Figure 19 yes Figure 18 A magnified view of a section at point D.

[0041] Figure 20 This is a schematic diagram of the connection structure between the rotating arm and the rotating table (with some parts removed).

[0042] Figure 21 This is a schematic diagram of the clamping structure on the frame.

[0043] The labels in the diagram represent:

[0044] 1. Thickening tank; 2. Walking frame; 3. Foam collection component; 31. Second drive component; 32. Float; 321. Support frame; 322. Foaming material block; 33. Foam scraper; 34. Second transmission component; 35. Rotating arm; 4. Foam breaking component; 41. Rotating foam scraper; 411. Second rotating shaft; 412. Fence; 42. Foam scraper support component; 43. Foam scraper drive component; 44. Foam scraper transmission component; 5. Foam separation and elimination component; 51. Water absorption ring; 52. Water barrier ring; 5 3. Bubble collecting hopper; 531. First hole; 532. Second hole; 54. Defoaming tank; 541. Tank body; 5411. Feed inlet; 5412. Discharge outlet; 542. Dispersion disc; 5421. Protrusion; 55. First drive assembly; 551. First rotating shaft; 552. First drive component; 6. Drainage component; 61. Submersible pump; 62. Venturi tube; 63. First connecting pipe; 64. Second connecting pipe; 7. Frame; 71. Rotary table; 72. Main frame; 73. Clamping component. Detailed Implementation

[0045] The present invention will be further described in detail below. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Example 1

[0050] like Figures 1 to 19 As shown, the immersion foam separation, collection, and elimination equipment of this embodiment includes a foam separation and elimination component 5, a foam collection component 3, a foam breaking component 4, and a drainage component 6. The foam collection component 3 floats on the surface of the thickening tank 1 and scrapes the foam to the foam breaking component 4 for breaking. The broken foam enters the foam separation and elimination component 5 for foam and water separation. The separated water is discharged by the drainage component 6. The foam breaking component 4 includes multiple rotatable bubble grids. The foam separation and elimination component 5 is located within the area enclosed by the multiple bubble grids. The foam separation and elimination component 5 includes a water-absorbing ring 51, a water-blocking ring 52, a foam collecting bucket 53, and a defoaming bucket 54. The water-absorbing ring 51 is sleeved on the outer peripheral wall of the defoaming bucket 54. The upper part of 51 has an opening, and the inner cavity of the water-absorbing ring 51 is connected to the drainage component 6; the water-blocking ring 52 is located at the opening above the water-absorbing ring 51 and can float up and down relative to the water-absorbing ring 51; the upper and lower parts of the defoaming tank 54 are respectively provided with a feed inlet 5411 and a discharge outlet 5412; one end of the bubble collecting bucket 53 is connected to the inner wall of the water-blocking ring 52, and the other end extends into the defoaming tank 54; the bubble collecting bucket 53 has multiple first holes 531 for water to pass through at one end near the water-blocking ring 52; the first holes 531 are located on the outside of the defoaming tank 54 and are connected to the inner cavity of the water-absorbing ring 51; the bubble collecting bucket 53 has a second hole 532 for foam to pass through at the upper inner side of the defoaming tank 54; the second hole 532 is connected to the defoaming tank 54.

[0051] The immersion foam separation, collection, and elimination equipment of the present invention has a foam collection component 3 floating on the surface of the thickening tank 1, separating and collecting the foam on the tank surface to the area around the foam breaking component 4. It eliminates the need for a linear track to move the foam separation and elimination component 5, resulting in low production costs and suitability for foam elimination in large-size thickening tanks. The foam breaking component 4 breaks the collected foam into small pieces and feeds them into the foam separation and elimination component 5. The water-retaining ring 52 of the foam separation and elimination component 5 fluctuates according to the water level in the water-absorbing ring 51, reducing the amount of water entering the foam separation and elimination component 5, preventing the defoaming tank 54 from becoming completely filled with water. Simultaneously, it ensures that the liquid level in the water-absorbing ring 51 remains lower than the liquid level in the thickening tank 1. This level difference causes the foam around the water-absorbing ring 51 to be carried by the water flow to the foam collection bucket 53. The water flow carrying the foam (such as...) Figure 6As indicated by the arrow (cloud-shaped, representing foam), when the foam flows in, the foam separation and elimination component 5 separates the liquid from the foam. Since the liquid has better fluidity than the foam, most of the liquid leaks from the first hole 531 of the foam collecting hopper 53 into the water absorption ring 51. The foam is separated by the second hole 532 of the foam collecting hopper 53 and enters the defoaming tank 54. The first hole 531 and the second hole 532 of the foam collecting hopper 53 separate the liquid and the foam. The foam is defoamed in the defoaming tank 54 and reduced to slurry, which flows to the outlet 5412 of the defoaming tank 54. It is then sucked away by the drainage component 6 and discharged back to the thickening tank 1 along with the water. In this invention, after collecting the foam with a mechanical device, the foam is driven by water flow to enter the foam separation and elimination component 5. The foam and liquid are separated by the difference in fluidity between the foam and the liquid. The defoaming tank 54 captures the foam layer, and the water absorption ring 51 collects the slurry layer, separating the foam layer and the slurry layer. Defoaming is performed on the foam layer.

[0052] like Figure 2 and Figure 3 As shown, in this invention, the submersible foam separation, collection, and elimination equipment also includes a frame 7. The foam separation and elimination component 5, the foam collection component 3, the foam breaking component 4, and the drainage component 6 are all connected to the frame 7, which is fixed to the traveling frame 2 of the thickening tank 1. The frame 7 serves two purposes: firstly, it provides connection and positioning for each component; secondly, it prevents the water-retaining ring 52 from floating off the water-absorbing ring 51, acting as a limiting baffle for the water-retaining ring 52.

[0053] like Figure 6 As shown, in this embodiment, the thickness of the water-blocking ring 52 is greater than the distance between the upper edge of the water-absorbing ring 51 and the frame 7, satisfying the following: the lowest depth h1 of the inner cavity of the water-absorbing ring 51 > the thickness h2 of the water-blocking ring 52 > the distance h3 between the frame 7 and the upper edge of the water-absorbing ring 51. That is, when the equipment of the present invention is first placed in the thickening tank 1 and has not yet been turned on, the upper surface of the water-blocking ring 52 is held up by the frame 7, so that the lower surface of the float 32 is still below the upper edge of the water-absorbing ring 51. After the equipment is turned on, the pump suction flow rate Q1 will be greater than the inflow flow rate Q2, causing the water level of the water-absorbing ring 51 to drop.

[0054] In this embodiment, the discharge port 5412 is a cone-shaped bottom outlet.

[0055] In this embodiment, the upper edge of the water-absorbing ring 51 is 3-8 cm below the liquid surface of the thickening tank 1, and the position of the upper surface of the water-blocking ring 52 is determined by the liquid level inside the water-absorbing ring 51, which is the liquid level height of the water-absorbing ring 51 plus the thickness of the water-blocking ring 52.

[0056] like Figure 6 , Figure 11 As shown, in this embodiment, the first hole 531 is an elongated hole, which is spaced along the outer circumference of the bubble collecting bucket 53. The inner and outer edges of the first hole 531 are located above the water absorption ring 51, rather than above the defoaming bucket 54, so that the liquid enters the water absorption ring 51 instead of the defoaming bucket 54.

[0057] like Figure 6 and Figure 7 As shown, the defoaming tank 54 includes a tank body 541 and a dispersion disc 542 located inside the tank body 541. The dispersion disc 542 is rotatable relative to the tank body 541 and is used to eliminate foam inside the tank body 541. The inlet 5411 and the outlet 5412 are provided on the tank body 541. The foam is accelerated by the rotating dispersion disc 542 and impacts the inner wall of the defoaming tank 54 under the action of centrifugal force, destroying the ultra-stable foam structure. At the same time, the rotating dispersion disc 542 will create a negative pressure environment inside the defoaming tank 54 (negative pressure is formed by stirring). With the help of the drainage component 6, the gas inside the ultra-stable foam is discharged. The ultra-stable foam is reduced to slurry and flows to the outlet 5412 of the defoaming tank 54, and is discharged to the thickening tank 1 through the drainage component 6.

[0058] In this embodiment, the dispersion disc 542 is horizontally positioned between the inlet 5411 and the outlet 5412, and a channel is provided between the dispersion disc 542 and the inner wall of the barrel 541 to facilitate the movement of foam from top to bottom (e.g., Figure 6 As shown in the figure (channel labels are not shown), the foam falls onto the dispersion disk 542. The dispersion disk 542 rotates, causing the foam to move centrifugally and impact the inner wall of the barrel 541, thus achieving the purpose of defoaming. The defoamed slurry flows downward from the channel.

[0059] like Figure 7 and Figure 10 As shown, the upper surface of the dispersion disk 542 is provided with protrusions 5421; the protrusions 5421 increase the contact area between the foam and the dispersion disk 542, which can drive more foam movement. In this embodiment, the protrusions 5421 are involute, spiral, or arc-shaped, and are arranged from the center to the circumference, forming a guiding effect on the foam, which facilitates the foam to move outward in a circular motion under the action of centrifugal force.

[0060] The protrusion 5421 extends from the center of the dispersion disk 542 towards the circumference. The height of the protrusion 5421 near the center of the dispersion disk 542 is L1, and the height of the protrusion 5421 near the circumference of the dispersion disk 542 is L2, satisfying L2≥L1. In this embodiment, L2=L1. In other embodiments, L2>L1, which better facilitates the centrifugal impact of foam onto the inner wall of the defoaming tank 54 body 541.

[0061] like Figure 4 , Figure 5 , Figure 6 As shown, the foam separation and elimination component 5 further includes a first drive assembly 55, which includes a first rotating shaft 551 and a first drive member 552. The first rotating shaft 551 is connected to the dispersing disk 542, and the first drive member 552 is used to drive the first rotating shaft 551 to rotate. In this embodiment, the first drive member 552 is a motor.

[0062] The absorbent ring 51 is connected to the frame 7. The outer circumference of the absorbent ring 51 has a flange, and the lower part of the frame 7 has a locking component 73 that mates with the flange (e.g., ...). Figure 21 As shown), this engages the water-absorbing ring 51 with the frame 7.

[0063] like Figure 12 , Figure 13 As shown, the foam breaking assembly 4 includes a rotating foam scraper 41, a foam scraper support 42, and a foam scraper drive 43. The rotating foam scraper 41 is supported on the foam scraper support 42. The rotating foam scraper 41 includes a second rotating shaft 411 and a grid 412 located on the second rotating shaft 411. The foam scraper drive 43 is used to drive the second rotating shaft 411 to rotate so that the grid 412 can break the foam.

[0064] The foam breaking assembly 4's scraper grid support 42 is mounted on the frame 7, surrounding the water suction ring 51 of the foam separation and elimination component 5. Due to the high viscosity and density of ultra-stable foam, it sometimes forms floating lumps on the water surface, resembling icebergs. These lumps, upon approaching the water suction ring 51, cannot be carried by the water flow into the bubble collection hopper 53 and instead obstruct the material from entering. The foam breaking assembly 4 is driven by the scraper grid drive 43 (motor) to rotate the second rotating shaft 411 around its perimeter, breaking up large pieces of ultra-stable foam. Simultaneously, it scoops up the ultra-stable foam around the water suction ring 51 and collects it into the water suction ring 51 and the bubble collection hopper 53.

[0065] like Figure 12 and Figure 13 As shown, in this embodiment, the foam breaking assembly 4 further includes a foam grid transmission component 44, which is located on the foam scraping grid support component 42. The foam scraping grid drive component 43 drives the second rotating shaft 411 to rotate through the foam grid transmission component 44. The foam grid transmission component 44 is a belt drive system. The belt drive system includes a belt and transmission gears, with transmission gears located at both ends of the belt. One transmission gear is connected to the second rotating shaft 411, and the other transmission gear is connected to the output end of the foam scraping grid drive component 43.

[0066] like Figure 14 and Figure 15As shown, the drainage component 6 includes a submersible pump 61, a venturi tube 62, a first connecting pipe 63, and a second connecting pipe 64. The inlet end of the submersible pump 61 is connected to the inner cavity of the suction ring 51 through the first connecting pipe 63. The branch suction inlet end of the venturi tube 62 is connected to the outlet 5412 of the defoaming tank 54. The inlet end of the venturi tube 62 is connected to the outlet end of the submersible pump 61 through the second connecting pipe 64. The outlet end of the venturi tube 62 is connected to the outside. The drainage component 6 draws away the liquid in the suction ring 51. The discharge pressure of the venturi tube 62 and the submersible pump 61 is converted into negative pressure suction at the outlet 5412 of the defoaming tank 54, drawing out the slurry that has been degassed from the defoaming tank 54 and discharging it back into the thickening tank 1, accelerating the sedimentation of the concentrate in the ultra-stable foam. In this embodiment, the Venturi tube 62 cannot be replaced by an ordinary three-way pipe. The Venturi tube 62 uses the discharge water pressure of the submersible pump 61 to extract the material in the defoaming tank 54. The part of the Venturi tube 62 that is far from the branch is the main inlet, the branch is the suction inlet, and the part that is close to the branch is the outlet.

[0067] In this embodiment, the submersible pump 61 is vertical.

[0068] like Figures 16 to 18 As shown, the foam collection component 3 includes a second drive component 31, a float 32, a foam scraper 33, a second transmission component 34, and a rotating arm 35. The foam scraper 33 slides on the float 32, which floats on the surface of the thickener 1. The rotating arm 35 rotates around the rotating platform 71 on the frame 7, causing the float 32 to rotate around the central axis of the rotating platform 71 to perform a low-speed fan-shaped sweeping motion, facilitating the collection of foam over a large area. The second drive component 31 drives the foam scraper 33 to slide on the float 32 via the second transmission component 34, thereby scraping foam far from the foam breaking component 4 to the foam breaking component 4 for breaking. The main function of the foam collection component 3 is to collect the ultra-stable foam far from the foam separation and elimination component 5 on the surface of the thickener 1 around the water absorption ring 51. The foam collecting component 3 of the present invention has a rotating table 71 that is an electric rotating table, which can drive the float 32 to rotate at low speed on the surface of the thickening tank 1 to collect foam over a large area. The second driving component 31 drives the foam scraper 33 to reciprocate to efficiently collect foam. The second driving component 31 and the electric rotating table work together to greatly improve the foam collecting efficiency and remove foam from the surface of the thickening tank 1 over a large area.

[0069] One end of the rotating arm 35 is fixedly connected to the rotating table 71 (e.g.) Figure 20 As shown), the other end is connected to the float 32 (as shown). Figure 16 and Figure 18 As shown, when the rotating platform 71 rotates, it drives the rotating arm 35 to rotate, thereby changing the position of the float 32 on the thickening tank 1, so as to capture foam from other parts of the thickening tank 1.

[0070] The float 32 and the bubble scraper 33 float on the surface of the thickening tank 1. The length of the float 32 is related to the diameter of the thickening tank 1. The larger the diameter of the thickening tank 1, the longer the float 32 is, so as to meet the needs of foam capture in various areas of the thickening tank 1.

[0071] In this embodiment, as Figure 20 As shown, the frame 7 includes a main frame 72, which is horizontally arranged. A rotating table 71 is mounted on the main frame 72. The main frame 72 has mounting holes for the first rotating shaft 551 to pass through. The first driving component 552 is located above the main frame 72, and the water absorption ring 51, water baffle ring 52, bubble collecting bucket 53, and defoaming bucket 54 are located below the main frame 72. In this embodiment, the float 32 is composed of multiple unit blocks connected together. Each unit block includes a support frame 321 and a foaming material block 322, which is connected to the support frame 321. The foaming material block 322 is an organic foaming material, and the support frame 321 is a metal frame. Adjacent unit blocks are connected by the support frame 321. The modular unit blocks can be assembled into different lengths to adapt to thickening tanks 1 of different diameters. In this embodiment, the main body of the float 32 is made of organic foam material and floats on the surface of the pool by buoyancy. It can be adapted to thickeners of different sizes by splicing multiple unit blocks. Since it floats on the water surface by buoyancy, the distributed buoyancy support of the water surface on the float 32 means that there is no need to worry about the structural strength problem of excessive stress caused by the excessive length of the float 32 connection for large-sized thickeners.

[0072] like Figure 16 , Figure 17 and Figure 18 As shown, the second driving component 31 and the second transmission component 34 include a friction reciprocating wire winch and a pulley assembly. The second driving component 31 is a winch, and the second transmission component 34 includes a drum, a pulley assembly, and a wire rope. The drum is used to position one end of the wire rope. The wire rope is reversed through the pulley assembly. Pulleys are provided at both ends of the float 32 along its length. One pulley is located near the rotating arm 35, and the other pulley is located away from the rotating arm 35. The wire rope is looped between the pulleys. The bubble scraper 33 is connected to the wire rope. When the winch drives the drum to roll, the wire rope also moves. As a result, the bubble scraper 33 on the wire rope moves along the length of the float 32. The bubble scraper 33 achieves reciprocating motion on the float 32 through the second driving component 31 and the second transmission component 34 on the rotating arm 35, capturing the distant foam to the vicinity of the foam separation and elimination component 5.

[0073] In this embodiment, the float 32 has a sliding hole along its length. The wire rope is closed, with one side located outside the float 32 and the other side located inside the sliding hole. A pulley is positioned near the sliding hole to provide support for the wire rope. The bubble scraper 33 is connected to the wire rope located outside the float 32.

[0074] Example 2

[0075] Based on Embodiment 1, the grid 412 of the rotating bubble scraper 41 is made of stainless steel with a hydrophobic surface, which reduces the adhesion of foam to the grid 412 surface and improves the crushing efficiency. The spacing between adjacent grids 412 is 10-15mm. This spacing design can effectively crush larger foam clusters without causing excessive dispersion of small foams.

[0076] Example 3

[0077] Based on Example 1, the submersible pump 61 is a centrifugal water pump with a flow rate of 5-10 m³ / h and a head of 10-15 m, which can meet the drainage requirements of the device. The venturi tube 62 has a throat diameter of 15 mm, an inlet diameter of 30 mm, and an outlet diameter of 25 mm, satisfying the condition that throat diameter < outlet diameter < inlet diameter. This size design can generate sufficient negative pressure to effectively draw water from the defoaming tank 54.

[0078] Example 4

[0079] Based on Embodiment 1, the float 32 consists of 6-8 unit blocks, each with a length of 300-500mm, a width of 150-200mm, and a height of 100-150mm. The support frame 321 is made of 316 stainless steel with a wall thickness of 2-3mm, and the foam material block 322 is made of closed-cell polyethylene foam with a density of 30-50kg / m³. This design gives the float 32 sufficient buoyancy and stability, enabling it to operate stably on the water surface.

[0080] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. An immersion foam separation, collection, and elimination device, comprising a foam separation and elimination component (5), a foam collection component (3), a foam breaking component (4), and a drainage component (6), wherein the foam collection component (3) scrapes foam to the foam breaking component (4) for breaking, the broken foam enters the foam separation and elimination component (5) for foam and water separation, and the separated water is discharged by the drainage component (6), characterized in that: The foam collecting component (3) floats on the surface of the thickening tank (1), the foam breaking component (4) includes multiple rotatable foam grids, and the foam separation and elimination component (5) is located within the area enclosed by the multiple foam grids. The foam separation and elimination component (5) includes a water-absorbing ring (51), a water-blocking ring (52), a foam collecting bucket (53), and a defoaming bucket (54). The water-absorbing ring (51) is fitted onto the outer peripheral wall of the defoaming bucket (54), and the upper part of the water-absorbing ring (51) has an opening. The inner cavity of the water-absorbing ring (51) is connected to the drainage component (6). The water-blocking ring (52) is located at the opening above the water-absorbing ring (51) and can float up and down according to the water level inside the water-absorbing ring (51). The water-blocking ring (52) is a ring that surrounds the inner side of the outer wall of the water-absorbing ring (51), and the water-blocking ring (52) is inserted into the opening. The defoaming bucket (54) is... The upper and lower parts are respectively provided with a feed inlet (5411) and a discharge outlet (5412). One end of the bubble collecting bucket (53) is connected to the inner wall of the water baffle ring (52), and the other end extends into the defoaming bucket (54). The bubble collecting bucket (53) has multiple first holes (531) for water supply at one end near the water baffle ring (52). The first holes (531) are located outside the defoaming bucket (54) and communicate with the inner cavity of the water absorption ring (51). The bubble collecting bucket (53) has a second hole (532) for foam to pass through at the upper inner side of the defoaming bucket (54). The second hole (532) is connected to the defoaming bucket (54). The submersible foam separation, collection and elimination equipment also includes a frame (7), foam separation and elimination components (5), foam collection components (3), foam breaking components (4), and drainage components (6) are all connected to the frame (7), and the frame (7) is fixed to the walking frame (2) of the thickening tank (1); The foam collection component (3) includes a second drive (31), a float (32), a foam scraper (33), a second transmission component (34), and a rotating arm (35). The foam scraper (33) is slidably mounted on the float (32), which floats on the surface of the thickening tank (1). The rotating arm (35) rotates around the rotating platform (71) on the frame (7) to drive the float (32) to rotate around the rotation center axis of the rotating platform (71) to collect foam. The second drive (31) drives the foam scraper (33) to slide on the float (32) through the second transmission component (34) to scrape the foam away from the foam breaking component (4) to the foam breaking component (4) for breaking. The floating block (32) is composed of multiple unit blocks connected together. The unit block includes a support frame (321) and a foam material block (322), and the foam material block (322) is connected to the support frame (321).

2. The immersion foam separation, collection, and elimination equipment according to claim 1, characterized in that: The defoaming tank (54) includes a tank body (541) and a dispersion disc (542) located inside the tank body (541). The dispersion disc (542) is rotatable relative to the tank body (541) and is used to eliminate foam in the tank body (541). The inlet (5411) and outlet (5412) are provided on the tank body (541).

3. The immersion foam separation, collection, and elimination equipment according to claim 2, characterized in that: The dispersion plate (542) is horizontally positioned between the inlet (5411) and the outlet (5412), and a channel is provided between the dispersion plate (542) and the inner wall of the barrel (541) to facilitate the movement of foam from top to bottom.

4. The immersion foam separation, collection, and elimination equipment according to claim 3, characterized in that: The upper surface of the dispersion disk (542) is provided with protrusions (5421).

5. The immersion foam separation, collection, and elimination equipment according to claim 4, characterized in that: The protrusion (5421) extends from the middle of the dispersion disk (542) towards the circumference. The height of the protrusion (5421) near the middle of the dispersion disk (542) is L1, and the height of the protrusion (5421) near the circumference of the dispersion disk (542) is L2, satisfying L2≥L1.

6. The immersion foam separation, collection, and elimination equipment according to any one of claims 2 to 5, characterized in that: The foam separation and elimination component (5) further includes a first driving assembly (55), which includes a first rotating shaft (551) and a first driving member (552). The first rotating shaft (551) is connected to a dispersing disk (542), and the first driving member (552) is used to drive the first rotating shaft (551) to rotate.

7. The immersion foam separation, collection, and elimination equipment according to any one of claims 2 to 5, characterized in that: The foam breaking assembly (4) includes a rotating foam scraper (41), a foam scraper support (42), and a foam scraper drive (43). The rotating foam scraper (41) is supported on the foam scraper support (42). The rotating foam scraper (41) includes a second rotating shaft (411) and a fence (412) located on the second rotating shaft (411). The foam scraper drive (43) is used to drive the second rotating shaft (411) to rotate so as to drive the fence (412) to break the foam.

8. The immersion foam separation, collection, and elimination equipment according to any one of claims 1 to 5, characterized in that: The drainage component (6) includes a submersible pump (61), a venturi tube (62), a first connecting pipe (63), and a second connecting pipe (64). The inlet end of the submersible pump (61) is connected to the inner cavity of the suction ring (51) through the first connecting pipe (63). The branch suction inlet end of the venturi tube (62) is connected to the outlet (5412) of the defoaming tank (54). The inlet end of the venturi tube (62) is connected to the outlet end of the submersible pump (61) through the second connecting pipe (64). The outlet end of the venturi tube (62) is connected to the outside.

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