Immersed foam separating, trapping and eliminating equipment

Abstract

The invention discloses immersed foam separating, trapping and eliminating equipment which is characterized in that a foam trapping component floats on the liquid level of a thickening pool to separate foam on the pool surface and collect the foam to the periphery of a foam crushing component, and the foam crushing component crushes the collected foam into small blocks and feeds the small blocks into a foam separating and eliminating component; a water retaining ring in the foam separation and elimination component floats up and down according to the water level in a water absorption ring, so that the water inflow in the foam separation and elimination component can be reduced, and meanwhile, a water drainage component can enable the liquid level in the water absorption ring to be always lower than the liquid level of the thickening pool; most liquid leaks into the water absorption ring from the first hole of the foam collecting hopper, foam is separated out by the second hole of the foam collecting hopper and enters the defoaming barrel, the foam is defoamed in the defoaming barrel and reduced into ore pulp, the ore pulp flows to the discharge port of the defoaming barrel, and then the ore pulp is sucked away by the drainage component and discharged back to the thickening pool together with water. The method has the advantages of being low in cost and suitable for eliminating the three-phase foam in a large range by the large-size thickener.

Description

Technical Field

[0001] The present invention relates to the technical field of foam elimination, and particularly to an immersion foam separation, collection and elimination device. Background Art

[0002] In concentrators, thickeners are commonly used to concentrate flotation concentrates and tailings. The super-stable foam generated during flotation will accumulate on the thickener for a long time and cannot settle effectively. A large amount of concentrate is contained in the foam layer, and if it cannot be effectively recovered, a large amount of concentrate will be lost with the overflow water.

[0003] Currently, the common defoaming methods for thickeners in concentrators include spray defoaming, chemical agent defoaming, and high-pressure water defoaming. Spray defoaming uses water to dilute the foam and utilizes the gravity of liquid droplets or water flow to eliminate the foam. Its disadvantages are that it consumes a large amount of water resources, has poor effects on viscous foam, and the addition of a large amount of clear water also reduces the working efficiency of the thickener; Chemical agent defoaming is to spray chemicals on the thickener to change the surface tension of the foam to make the foam break by itself. The disadvantage is that the cost is relatively high and the newly added chemicals may have an adverse impact on the upstream and downstream production operations; High-pressure water defoaming is to use high-pressure water sprayed by atomizing nozzles to impact and dilute the foam to make it break. The disadvantage is that the impact of the high-pressure atomized water on the foam is not strong and the defoaming efficiency is not high.

[0004] There are some existing defoaming barrels for mineral flotation. First, the collected foam is input into the defoaming barrel. After the foam is inhaled through an inverted chamber by vacuum pumping, negative pressure, stirring, spraying and other measures are taken together through an air extraction system for defoaming. After defoaming, the material is transported to the thickener. Such defoaming barrels are suitable for the treatment of foam materials after the flotation process in concentrators, and will foam again due to impact and frothers and collectors added in the beneficiation process during the feeding process, and cannot be used to solve the problem of foam accumulation on the thickener.

[0005] To solve the technical problem of foam accumulation, Chinese Patent Document Publication No. CN 118949490 B discloses a foam trapping and eliminating device. The device includes a foam trapping mechanism and a foam eliminating mechanism. The foam trapping mechanism transports the trapped foam to the foam eliminating mechanism for elimination. The foam trapping mechanism is arranged on the foam eliminating mechanism. The foam scooping bucket includes a rotating shaft, a bucket body, a protective cylinder, and a plurality of foam scooping units located inside the bucket body. When the foam scooping units of the foam trapping mechanism rotate relative to the rotating shaft, the first scraper of the foam scooping unit cuts the foam. At the same time, the foam enters the foam accommodating cavity and is transported to the foam outlet under the drive of the rotation of the foam scooping unit, and enters the foam inlet channel of the foam eliminating mechanism through the foam outlet for defoaming. This device is only applicable to thickeners with a relatively small diameter. For large-sized thickeners, this defoaming device can only collect and eliminate the super-stable foam near it, and cannot remove the super-stable foam over a large area on the pool surface, and the foam elimination area is limited. Chinese Patent Document Publication No. CN118925297B discloses a foam eliminating equipment and system, which adopts the foam trapping and eliminating device disclosed in CN 118949490 B, and a circumferential track and an R-axis direction track are erected on the thickener. Theoretically, it can achieve the cleaning of a large area of foam. However, in the application, the applicant found that when applied to large-sized thickeners (with a diameter greater than 40 m), the track to be erected is relatively long, the track span is more than 20 m and the straight track without support in the middle has a high production cost, and the strength of many existing materials cannot meet the requirements of stable operation, so the large-scale promotion is limited. Based on this, the present invention provides an equipment that is applicable to large-sized thickeners and can stably defoam over a large area. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an immersion type foam separation, trapping and eliminating equipment with low cost and applicable to large-sized thickeners for large-scale elimination of three-phase foam.

[0007] To solve the above technical problem, the present invention adopts the following technical solutions: An immersion type foam separation, trapping and eliminating equipment, including a foam separation and elimination component, a foam trapping component, a foam crushing component, and a drainage component. The foam trapping component scrapes the foam to the foam crushing component for crushing. The crushed foam enters the foam separation and elimination component for foam and water separation, and the separated water is discharged by the drainage component. The foam trapping component floats on the liquid surface of the thickener. The foam crushing component includes a plurality of rotatable bubble grids. The foam separation and elimination component is located within the area surrounded by the plurality of bubble grids; The foam separation and elimination component includes a water absorption ring, a water blocking ring, a foam collecting hopper, and a defoaming barrel. The water absorption ring is sleeved on the outer peripheral wall of the defoaming barrel, and an opening is provided at the upper part of the water absorption ring. The inner cavity of the water absorption ring is communicated with the drainage component. The water blocking ring is located at the opening above the water absorption ring and can float up and down relative to the water absorption ring. The upper and lower parts of the defoaming barrel are respectively provided with a feed port and a discharge port. 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. A plurality of first holes for water to pass through are provided at one end of the foam collecting hopper close to the water blocking ring. The first holes are located outside the defoaming barrel and are communicated with the inner cavity of the water absorption ring. A second hole for foam to pass through is provided above the defoaming barrel inside the foam collecting hopper. The second hole is communicated with the defoaming barrel.

[0008] As a further improvement of the above technical solution: The defoaming barrel includes a barrel body and a dispersion plate located inside the barrel body. The dispersion plate is rotatable relative to the barrel body and is used to eliminate the foam in the barrel body. The feed port and the discharge port are arranged on the barrel body.

[0009] The dispersion plate is horizontally arranged between the feed port and the discharge port. A channel is provided between the dispersion plate and the inner wall of the barrel body to facilitate the downward movement of the foam.

[0010] The upper surface of the dispersion plate is provided with protrusions; the protrusions are spiral or arc-shaped.

[0011] The protrusions extend from the middle of the dispersion plate towards the circumferential part. The height of the protrusions on the side close to the middle of the dispersion plate is L1, and the height of the protrusions on the side close to the circumference of the dispersion plate is L2, satisfying L2≥L1.

[0012] The foam separation and elimination component further includes a first driving assembly. The first driving assembly includes a first rotating shaft and a first driving member. The first rotating shaft is connected to the dispersion plate, and the first driving member is used to drive the first rotating shaft to rotate.

[0013] The foam crushing component includes a rotating foam scraping grid, a foam scraping grid support member, and a foam scraping grid driving member. The rotating foam grid is supported on the foam scraping grid support member. The rotating foam scraping grid includes a second rotating shaft and a fence located on the second rotating shaft. The foam scraping grid driving member is used to drive the second rotating shaft to rotate to drive the fence to crush the foam.

[0014] The drainage component includes a submerged pump, a Venturi tube, a first connecting pipe, and a second connecting pipe. The inlet end of the submerged pump is communicated with the inner cavity of the water absorption ring through the first connecting pipe. The branch suction inlet end of the Venturi tube is connected to the discharge port of the defoaming barrel. The inlet end of the Venturi tube is connected to the outlet end of the submerged pump through the second connecting pipe. The outlet end of the Venturi tube is communicated with the outside.

[0015] The foam trapping component includes a second driving member, a floating block, a foam scraping plate, a second transmission member, a rotating arm and a rotating drive. The foam scraping plate is slidably arranged on the floating block. The floating block floats on the surface of the thickening tank liquid. The rotating drive is used to drive the rotating arm to rotate, so as to drive the floating block floating on the water surface to rotate around the center of the rotating drive to collect foam. The second driving member drives the foam scraping plate to slide on the floating block through the second transmission member, so as to scrape the foam far away from the foam crushing component to the foam crushing component for crushing.

[0016] The floating block is formed by connecting a plurality of unit blocks. Each unit block includes a support skeleton and a foaming material block, and the foaming material block is connected to the support skeleton.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: An immersion type foam separation and trapping elimination equipment of the present invention. The foam trapping component floats on the surface of the thickening tank liquid, separates and collects the foam on the tank surface around the foam crushing component, and there is no need to install a linear track to move the foam separation and elimination component, with low production cost, suitable for eliminating foam in large-size thickening tanks. The foam crushing component crushes the collected foam into small pieces and sends them into the foam separation and elimination component. The water blocking ring of the foam separation and elimination component can float up and down according to the water level in the water absorption ring to control the water inflow in the foam separation and elimination component, so as to keep the defoaming bucket with high-efficiency foam entry while greatly reducing the water inflow. At the same time, the drainage component can make the liquid level in the water absorption ring always lower than the liquid level of the thickening tank, and the foam around the water absorption ring is brought to the foam collecting hopper by the water flow due to the liquid level difference; when the water flow with foam flows into the foam separation and elimination component, since the fluidity of the liquid is better than that of the foam, most of the liquid will leak into the water absorption ring through the first hole of the foam collecting hopper, and the foam is separated by the second hole of the foam collecting hopper and enters the defoaming bucket. The first hole and the second hole of the foam collecting hopper separate the liquid and the foam. The foam is defoamed in the defoaming bucket, the foam is reduced to pulp and flows to the discharge port of the defoaming bucket, and then is sucked away by the drainage component and discharged back to the thickening tank together with water. The present invention collects foam through a mechanical device and drives the foam into the foam separation and elimination component by water flow, and completes the separation of foam and liquid through the difference in fluidity between foam and liquid. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention.

[0019] Figure 2 is Figure 1 the partial enlarged view at A in

[0020] Figure 3 is Figure 1 the structural schematic diagram of another view angle at A in

[0021] Figure 4 is the structural schematic diagram of the foam separation and elimination component.

[0022] Figure 5 It is the front view of the foam separation and elimination component.

[0023] Figure 6 It is Figure 5 the sectional view taken along line B-B in

[0024] Figure 7 the schematic exploded view (partial parts) of the foam crushing assembly.

[0025] Figure 8 It is the schematic structural view of the water absorption ring.

[0026] Figure 9 It is the schematic structural view of the defoaming barrel.

[0027] Figure 10 It is the top view of the dispersion disc.

[0028] Figure 11 It is the schematic structural view of the foam collecting hopper.

[0029] Figure 12 It is the schematic structural view of the foam trapping component.

[0030] Figure 13 It is the schematic structural view of the foam trapping component (from another perspective).

[0031] Figure 14 It is the schematic structural view of the foam separation and elimination component and the drainage component.

[0032] Figure 15 It is the schematic structural view of the foam separation and elimination component and the drainage component.

[0033] Figure 16 It is the schematic structural view of the foam trapping component (with some floating blocks removed).

[0034] Figure 17 It is Figure 16 the enlarged partial view at C in

[0035] Figure 18 It is the schematic structural view of the foam trapping component (with some floating blocks removed, from another perspective).

[0036] Figure 19 It is Figure 18 the enlarged partial view at D in

[0037] Figure 20 It is the schematic connection structure view of the rotating arm and the rotating table (with some parts removed).

[0038] Figure 21 It is the schematic structural view of the engaging part on the frame.

[0039] Each label in the figure represents: 1. Thickening tank; 2. Traveling frame; 3. Foam trapping component; 31. Second driving member; 32. Floating block; 321. Support skeleton; 322. Foaming material block; 33. Foam scraping plate; 34. Second transmission member; 35. Rotating arm; 4. Foam crushing assembly; 41. Rotating foam scraping grid; 411. Second rotating shaft; 412. Fence; 42. Foam scraping grid support member; 43. Foam scraping grid driving member; 44. Foam grid transmission member; 5. Foam separation and elimination component; 51. Water absorption ring; 52. Water retaining ring; 53. Foam collecting hopper; 531. First hole; 532. Second hole; 54. Defoaming barrel; 541. Barrel body; 5411. Feed port; 5412. Discharge port; 542. Dispersion plate; 5421. Protrusion; 55. First driving assembly; 551. First rotating shaft; 552. First driving member; 6. Drainage component; 61. Submersible pump; 62. Venturi tube; 63. First connecting pipe; 64. Second connecting pipe; 7. Frame; 71. Rotating table; 72. Frame main board; 73. Engaging member. Detailed implementation mode

[0040] 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.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0043] In the present invention, unless otherwise clearly specified and defined, the terms "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1 As Figures 1 to 19 shown, the immersion foam separation, trapping and elimination equipment of this embodiment includes a foam separation and elimination component 5, a foam trapping component 3, a foam crushing assembly 4, and a drainage component 6. The foam trapping component 3 floats on the liquid surface of the thickener 1 and sweeps the foam to the foam crushing assembly 4 for crushing. The crushed 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. The foam crushing assembly 4 includes a plurality of rotatable bubble grids. The foam separation and elimination component 5 is located within the area surrounded by the plurality of bubble grids; the foam separation and elimination component 5 includes a water absorption ring 51, a water blocking ring 52, a bubble collection hopper 53, and a defoaming barrel 54. The water absorption ring 51 is sleeved on the outer peripheral wall of the defoaming barrel 54, and an opening is provided at the upper part of the water absorption ring 51. The inner cavity of the water absorption ring 51 is communicated with the drainage component 6; the water blocking ring 52 is located at the opening above the water absorption ring 51 and can float up and down relative to the water absorption ring 51; a feed port 5411 and a discharge port 5412 are respectively provided at the upper and lower parts of the defoaming barrel 54. One end of the bubble collection hopper 53 is connected to the inner wall of the water blocking ring 52, and the other end extends into the defoaming barrel 54. A plurality of first holes 531 for water to pass through are provided at one end of the bubble collection hopper 53 close to the water blocking ring 52. The first holes 531 are located outside the defoaming barrel 54 and are communicated with the inner cavity of the water absorption ring 51. A second hole 532 for foam to pass through is provided above the defoaming barrel 54 inside the bubble collection hopper 53. The second hole 532 is communicated with the defoaming barrel 54.

[0045] For the immersion foam separation, trapping and elimination equipment of the present invention, the foam trapping component 3 floats on the liquid surface of the thickener 1, separates and collects the foam on the pool surface around the foam crushing assembly 4. There is no need to install a linear track to move the foam separation and elimination component 5, and the production cost is low. It is suitable for eliminating foam in large-sized thickeners. The foam crushing assembly 4 crushes the collected foam into small pieces and sends them into the foam separation and elimination component 5. The water blocking ring 52 of the foam separation and elimination component 5 floats up and down according to the water level in the water absorption ring 51, which can reduce the water inflow into the foam separation and elimination component 5, so that the defoaming barrel 54 will not be filled with water, and at the same time, it can make the liquid level in the water absorption ring 51 always lower than the liquid level of the thickener 1. Due to the liquid level difference, the foam around the water absorption ring 51 is brought to the bubble collection hopper 53 by the water flow; the water flow with foam (such as Figure 6As shown by the arrows, the cloud-shaped ones are foams) flow into the foam separation and elimination component 5, since the fluidity of liquid is better than that of foam, most of the liquid will leak into the water absorption ring 51 from the first hole 531 of the bubble collecting bucket 53, and the foam will be separated by the second hole 532 of the bubble collecting bucket 53 and enter the defoaming barrel 54. The first hole 531 and the second hole 532 of the bubble collecting bucket 53 separate the liquid and the foam, and the foam is defoamed in the defoaming barrel 54. The foam is reduced to ore pulp and flows to the discharge port 5412 of the defoaming barrel 54, and then is sucked away by the drainage component 6 and discharged back to the thickening pool 1 together with the water. The present invention collects the foam through a mechanical device and then drives the foam to enter the foam separation and elimination component 5 with water flow, and completes the separation of foam and liquid through the difference in fluidity between foam and liquid. The defoaming barrel 54 captures the foam layer, and the water absorption ring 51 collects the slurry layer, separates the foam layer and the slurry layer, and defoams the foam layer.

[0046] like Figure 2 and Figure 3 As shown, in the present invention, the submerged foam separation, capture and elimination equipment further includes a frame 7, and the foam separation and elimination component 5, the foam capture component 3, the foam crushing component 4, and the drainage component 6 are all connected to the frame 7, and the frame 7 is fixed to the traveling frame 2 of the thickening tank 1. On the one hand, the frame 7 provides connection and positioning for each component, and on the other hand, the frame 7 can prevent the water retaining ring 52 from floating out of the water absorption ring 51, and acts as a limiting baffle for the water retaining ring 52.

[0047] like Figure 6 As shown, in this embodiment, the thickness of the water retaining ring 52 is greater than the distance between the upper edge of the water absorption ring 51 and the frame 7, satisfying: the lowest depth h1 of the inner cavity of the water absorption ring 51> the thickness h2 of the water retaining ring 52> the distance h3 between the frame 7 and the upper edge of the water absorption ring 51, that is, when the equipment of the present invention is just placed in the thickening tank 1 and has not yet been turned on, the upper surface of the water retaining ring 52 is supported by the frame 7, so that the lower surface of the floating block 32 is still below the upper edge of the water absorption ring 51, and after the equipment is turned on, the pump suction flow Q1 will be greater than the inflow flow Q2, causing the water level of the water absorption ring 51 to drop.

[0048] In this embodiment, the discharge port 5412 is a cone-bottomed outlet.

[0049] In this embodiment, the upper edge of the water absorption ring 51 is 3-8 cm below the liquid surface of the thickening tank 1, and the upper surface position of the water retaining ring 52 is determined by the liquid level in the water absorption ring 51, which is the liquid level height of the water absorption ring 51 plus the thickness of the water retaining ring 52.

[0050] like Figure 6 , Figure 11 As shown, in this embodiment, the first hole 531 is a long hole, which is arranged at intervals along the outer circumference of the bubble collecting bucket 53, and the inner edge and outer edge of the first hole 531 are both located above the water absorption ring 51, rather than above the defoaming barrel 54, so that the liquid enters the water absorption ring 51 instead of the defoaming barrel 54.

[0051] As Figure 6 and Figure 7 shown, the defoaming barrel 54 includes a barrel body 541 and a dispersion disc 542 located inside the barrel body 541. The dispersion disc 542 is rotatable relative to the barrel body 541 and is used to eliminate the foam in the barrel body 541. The feed inlet 5411 and the discharge outlet 5412 are provided on the barrel body 541. The foam is driven and accelerated by the rotating dispersion disc 542 and then impacts the inner wall of the defoaming barrel 54 under the action of centrifugal force, destroying the structure of the super-stable foam. At the same time, the rotating dispersion disc 542 will create a negative pressure environment (stirring to form a negative pressure) in the defoaming barrel 54. Under the combined action of the drainage component 6, the gas in the super-stable foam is discharged, and the super-stable foam is reduced to pulp and flows to the discharge outlet 5412 of the defoaming barrel 54, and is discharged to the thickening tank 1 through the drainage component 6.

[0052] In this embodiment, the dispersion disc 542 is horizontally arranged between the feed inlet 5411 and the discharge outlet 5412. A channel (as shown in Figure 6 , the channel number is not shown in the figure) for the foam to move downward from top to bottom is provided between the dispersion disc 542 and the inner wall of the barrel body 541. The foam falls onto the dispersion disc 542, and the dispersion disc 542 rotates, driving the foam to move centrifugally and impact the inner wall of the barrel body 541 to achieve the purpose of defoaming. The defoamed pulp flows downward through the channel.

[0053] As Figure 7 and Figure 10 shown, the upper surface of the dispersion disc 542 is provided with protrusions 5421; the protrusions 5421 increase the contact area between the foam and the dispersion disc 542 and can drive more foam to move. In this embodiment, the protrusions 5421 are in the shape of involute, spiral or arc, and are arranged in a divergent manner from the middle to the circumference, forming a guiding effect on the foam and facilitating the foam to move outward in the circumferential direction under the action of centrifugal force.

[0054] The protrusions 5421 extend from the middle of the dispersion disc 542 towards the circumferential part. The height of the protrusions 5421 on the side close to the middle of the dispersion disc 542 is L1, and the height of the protrusions 5421 on the side close to the circumference of the dispersion disc 542 is L2, satisfying L2≥L1. In this embodiment, L2 = L1. In other embodiments, L2 > L1, which can better facilitate the foam to impact the inner wall of the barrel body 541 of the defoaming barrel 54 centrifugally.

[0055] As Figure 4 , Figure 5 , Figure 6 shown, the foam separation and elimination component 5 further includes a first driving assembly 55. The first driving assembly 55 includes a first rotating shaft 551 and a first driving member 552. The first rotating shaft 551 is connected to the dispersion disc 542, and the first driving member 552 is used to drive the first rotating shaft 551 to rotate. In this embodiment, the first driving member 552 is a motor.

[0056] The water absorption ring 51 is connected to the frame 7. A flange is provided on the outer circumference of the water absorption ring 51, and a clamping member 73 (such as Figure 21 shown) is provided at the lower part of the frame 7, whereby the water absorption ring 51 is clamped to the frame 7.

[0057] Such as Figure 12 , Figure 13 shown, the foam crushing assembly 4 includes a rotating foam scraping grid 41, a foam scraping grid support 42, and a foam scraping grid driving member 43. The rotating foam scraping grid 41 is supported on the foam scraping grid support 42. The rotating foam scraping grid 41 includes a second rotating shaft 411 and a fence 412 located on the second rotating shaft 411. The foam scraping grid driving member 43 is used to drive the second rotating shaft 411 to rotate, so as to drive the fence 412 to crush the foam.

[0058] The foam scraping grid support 42 of the foam crushing assembly 4 is installed on the frame 7 and surrounds the water absorption ring 51 of the foam separation and elimination component 5. Due to the high viscosity and density of the super-stable foam, sometimes floating blocks like icebergs will form on the water surface. After approaching the water absorption ring 51, they cannot be carried by the water flow into the foam collecting hopper 53, but will instead block the entry of materials. The foam crushing assembly 4 drives the second rotating shafts 411 around to rotate through the foam scraping grid driving member 43 (motor), breaks up large pieces of super-stable foam, and at the same time fishes the super-stable foam around the water absorption ring 51 into the water absorption ring 51 and the foam collecting hopper 53.

[0059] Such as Figure 12 and Figure 13 shown, in this embodiment, the foam crushing assembly 4 further includes a foam grid transmission member 44. The foam grid transmission member 44 is located on the foam scraping grid support 42. The foam scraping grid driving member 43 drives the second rotating shaft 411 to rotate through the foam grid transmission member 44. The foam grid transmission member 44 is a belt transmission system. The belt transmission system includes a belt and transmission gears. The transmission gears are located at both ends of the belt. One of the transmission gears is connected to the second rotating shaft 411, and the other transmission gear is connected to the output end of the foam scraping grid driving member 43.

[0060] Such as Figure 14 and Figure 15As shown in the figure, the drainage component 6 includes a submerged pump 61, a Venturi tube 62, a first connecting pipe 63 and a second connecting pipe 64. The inlet end of the submerged pump 61 is connected to the inner cavity of the water suction ring 51 through the first connecting pipe 63. The branch suction inlet end of the Venturi tube 62 is connected to the discharge port 5412 of the defoaming barrel 54. The inlet end of the Venturi tube 62 is connected to the outlet end of the submerged 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 pumps away the liquid in the water suction ring 51, and converts the discharge pressure through the Venturi tube 62 and the submerged pump 61 into negative pressure suction at the discharge port 5412 of the defoaming barrel 54, and pumps out the pulp with the air exhausted in the defoaming barrel 54 and discharges it back into the thickener 1, accelerating the settlement of the concentrate in the super-stable foam. In this embodiment, an ordinary three-way pipe cannot be used to replace the Venturi tube 62. The Venturi tube 62 draws out the materials in the defoaming barrel 54 by means of the discharge water pressure of the submerged pump 61. The main inlet of the Venturi tube 62 is far from the branch, the branch is the suction inlet, and the outlet is close to the branch.

[0061] In this embodiment, the submerged pump 61 is vertical.

[0062] As Figures 16 to 18 shown in the figure, the foam trapping component 3 includes a second driving member 31, a floating block 32, a foam scraping plate 33, a second transmission member 34, and a rotating arm 35. The foam scraping plate 33 is slidably arranged on the floating block 32. The floating block 32 floats on the liquid surface of the thickener 1. The rotating arm 35 rotates around the rotating table 71 on the frame 7 to drive the floating block 32 to rotate around the central axis of the rotating table 71 and perform a low-speed fan-shaped sweep, facilitating the collection of foam over a large range. The second driving member 31 drives the foam scraping plate 33 to slide on the floating block 32 through the second transmission member 34 to scrape the foam far from the foam crushing component 4 to the foam crushing component 4 for crushing. The main function of the foam trapping component 3 is to trap the super-stable foam on the liquid surface of the thickener 1 far from the foam separation and elimination component 5 around the water suction ring 51. In the foam trapping component 3 of the present invention, the rotating table 71 is an electric rotating table, which can drive the floating block 32 to rotate slowly on the water surface of the thickener 1 to collect the foam on the pool surface over a large range. The second driving member 31 drives the foam scraping plate 33 to reciprocate to efficiently collect the foam. The second driving member 31 and the electric rotating table cooperate with each other to greatly improve the foam trapping efficiency and remove the foam on the pool surface of the thickener 1 over a large range.

[0063] One end of the rotating arm 35 is fixedly connected to the rotating table 71 (as Figure 20 shown in the figure), and the other end is connected to the floating block 32 (as Figure 16 and Figure 18 shown in the figure). When the rotating table 71 rotates, it drives the rotating arm 35 to rotate, so that the position of the floating block 32 on the thickener 1 changes, and thus the foam in other parts of the thickener 1 can be trapped.

[0064] The floating block 32 and the foam scraping plate 33 float on the liquid surface of the thickening tank 1. The length of the floating block 32 is associated with the diameter dimension of the thickening tank 1. The larger the diameter of the thickening tank 1, the longer the floating block 32, so as to meet the requirements of foam trapping in various areas of the thickening tank 1.

[0065] In this embodiment, as Figure 20 shown, the frame 7 includes a frame main board 72, the frame main board 72 is horizontally arranged, the rotating table 71 is arranged on the frame main board 72, and an installation hole for the first rotating shaft 551 to pass through is opened on the frame main board 72. The first driving member 552 is located above the frame main board 72, and the water absorption ring 51, the water blocking ring 52, the bubble collecting hopper 53, and the defoaming barrel 54 are located below the frame main board 72. In this embodiment, the floating block 32 is formed by connecting multiple unit blocks. The unit block includes a support skeleton 321 and a foaming material block 322, and the foaming material block 322 is connected to the support skeleton 321. The foaming material block 322 is an organic foaming material, and the support skeleton 321 is a metal skeleton. Adjacent unit blocks are connected through the support skeleton 321. The modular unit blocks can be spliced into different lengths to adapt to thickening tanks 1 with different diameters. In this embodiment, the main body of the floating block 32 is made of an organic foaming material and floats on the pool surface by buoyancy. By splicing multiple unit blocks, it can adapt to thickening machines of different sizes. And because it floats on the water surface by buoyancy, the distributed buoyancy support of the water surface on the floating block 32 makes this structure not worry about the structural strength problem of excessive force caused by the too long connection of the floating block 32 of a large-size thickening machine.

[0066] As Figure 16 、 Figure 17 and Figure 18 shown, the second driving member 31 and the second transmission member 34 include a friction type reciprocating wire rope hoist and a pulley assembly. The second driving member 31 is a hoist. The second transmission member 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 floating block 32 in the length direction. One pulley is arranged near the rotating arm 35, and the other pulley is arranged on the side away from the rotating arm 35. The wire rope is sleeved between the pulleys. The foam scraping plate 33 is connected to the wire rope. When the hoist drives the drum to roll, the wire rope will also move. Thus, the foam scraping plate 33 on the wire rope moves along the length direction of the floating block 32. The foam scraping plate 33 realizes reciprocating movement on the floating block 32 through the second driving member 31 and the second transmission member 34 on the rotating arm 35, and traps the foam at the distal end to near the foam separation and elimination component 5.

[0067] In this embodiment, a sliding hole is opened in the floating block 32 along the length direction. The wire rope is in a closed shape, one side is located outside the floating block 32, and the other side is located in the sliding hole. The pulley is arranged near the sliding hole to provide support for the wire rope. The foam scraping plate 33 is connected to the wire rope located outside the floating block 32.

[0068] Embodiment 2 On the basis of Embodiment 1, the fence 412 of the rotary foam scraping grid 41 is made of stainless steel, and the surface has hydrophobicity, which can reduce the adhesion of foam on the surface of the fence 412 and improve the crushing efficiency. The distance between adjacent fences 412 is 10-15 mm. Such a distance design can effectively break large foam clusters without over-dispersing small foams.

[0069] Embodiment 3 On the basis of Embodiment 1, the submerged 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 throat diameter of the Venturi tube 62 is 15 mm, the inlet diameter is 30 mm, and the outlet diameter is 25 mm, satisfying: throat diameter < outlet diameter < inlet diameter. Such a size design can generate sufficient negative pressure to effectively suck the water in the defoaming bucket 54.

[0070] Embodiment 4 On the basis of Embodiment 1, the number of unit blocks of the floating block 32 is 6-8, and the length of each unit block is 300-500 mm, the width is 150-200 mm, and the height is 100-150 mm. The support skeleton 321 is made of 316 stainless steel material with a wall thickness of 2-3 mm, and the foaming material block 322 is made of closed-cell polyethylene foam material with a density of 30-50 kg / m³. Such a design makes the floating block 32 have sufficient buoyancy and stability and can work stably on the water surface.

[0071] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. An immersion foam separation, trapping and elimination equipment, comprising a foam separation and elimination component (5), a foam trapping component (3), a foam crushing assembly (4), and a drainage component (6). The foam trapping component (3) scrapes the foam to the foam crushing assembly (4) for crushing, and the crushed foam enters the foam separation and elimination component (5) for separating foam and water, and the separated water is discharged by the drainage component (6). It is characterized in that: The foam trapping component (3) floats on the liquid surface of the thickening tank (1). The foam crushing assembly (4) includes a plurality of rotatable bubble grids. The foam separation and elimination component (5) is located within the area surrounded by the plurality of bubble grids; The foam separation and elimination component (5) includes a water absorption ring (51), a water retaining ring (52), a bubble collecting hopper (53), and a defoaming barrel (54). The water absorption ring (51) is sleeved on the outer peripheral wall of the defoaming barrel (54), and an opening is provided at the upper part of the water absorption ring (51). The inner cavity of the water absorption ring (51) is communicated with the drainage component (6). The water retaining ring (52) is located at the opening above the water absorption ring (51) and can float up and down relative to the water absorption ring (51). The upper and lower parts of the defoaming barrel (54) are respectively provided with a feed port (5411) and a discharge port (5412). One end of the bubble collecting hopper (53) is connected to the inner wall of the water retaining ring (52), and the other end extends into the defoaming barrel (54). A plurality of first holes (531) for water to pass through are opened at one end of the bubble collecting hopper (53) close to the water retaining ring (52). The first holes (531) are located outside the defoaming barrel (54) and are communicated with the inner cavity of the water absorption ring (51). A second hole (532) for foam to pass through is opened above the defoaming barrel (54) inside the bubble collecting hopper (53). The second hole (532) is communicated with the defoaming barrel (54).

2. The immersion foam separation, capture and elimination equipment according to claim 1, characterized in that: The defoaming barrel (54) includes a barrel body (541) and a dispersion plate (542) located inside the barrel body (541). The dispersion plate (542) is rotatable relative to the barrel body (541) and is used for eliminating the foam in the barrel body (541). The feed port (5411) and the discharge port (5412) are arranged on the barrel body (541).

3. The immersion foam separation, capture and elimination equipment according to claim 2, characterized in that: The dispersion plate (542) is horizontally arranged between the feed port (5411) and the discharge port (5412). A channel for the foam to move downward from top to bottom is provided between the dispersion plate (542) and the inner wall of the barrel body (541).

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

5. The immersed foam separation, trapping and elimination equipment according to claim 4, characterized in that: The protrusions (5421) extend from the middle of the dispersion plate (542) towards the circumferential part. The height of the protrusions (5421) on the side close to the middle of the dispersion plate (542) is L1, and the height of the protrusions (5421) on the side close to the circumference of the dispersion plate (542) is L2, satisfying L2≥L1.

6. The immersion foam separation, capture 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). The first driving assembly (55) includes a first rotating shaft (551) and a first driving member (552). The first rotating shaft (551) is connected to the dispersion disc (542), and the first driving member (552) is used to drive the first rotating shaft (551) to rotate.

7. The immersion foam separation, capture and elimination equipment according to any one of claims 2 to 5, characterized in that: The foam crushing component (4) includes a rotating foam scraping grid (41), a foam scraping grid support (42), and a foam scraping grid driving member (43). The rotating foam scraping grid (41) is supported on the foam scraping grid support (42). The rotating foam scraping grid (41) includes a second rotating shaft (411) and a fence (412) located on the second rotating shaft (411). The foam scraping grid driving member (43) is used to drive the second rotating shaft (411) to rotate, so as to drive the fence (412) to crush the foam.

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

9. The immersion foam separation, capture and elimination equipment according to any one of claims 1 to 5, characterized in that: The foam trapping component (3) includes a second driving member (31), a floating block (32), a foam scraping plate (33), a second transmission member (34), and a rotating arm (35). The foam scraping plate (33) is slidably arranged on the floating block (32). The floating block (32) floats on the liquid surface of the thickening tank (1). The rotating arm (35) rotates around the rotating table (71) on the machine frame (7) to drive the floating block (32) to rotate around the rotation center axis of the rotating table (71) to collect foam. The second driving member (31) drives the foam scraping plate (33) to slide on the floating block (32) through the second transmission member (34), so as to scrape the foam far away from the foam crushing component (4) to the foam crushing component (4) for crushing.

10. The immersion foam separation and capture elimination equipment according to claim 9, characterized in that: The floating block (32) is formed by connecting a plurality of unit blocks. The unit block includes a support skeleton (321) and a foaming material block (322). The foaming material block (322) is connected to the support skeleton (321).

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