A combined defoaming device for ultra-stable flotation concentrate froth

Abstract

The present application belongs to mineral processing flotation, disclose a kind of super stable flotation clean coal foam combination defoaming device, including support, defoaming cylinder is provided on support, defoaming mechanism is provided in defoaming cylinder;Defoaming mechanism includes the drive assembly of being arranged at the top of defoaming cylinder, the output end of drive assembly is connected with the stirring assembly of being inserted into defoaming cylinder;Stirring assembly is provided with defoaming assembly, defoaming assembly is connected with drive assembly;Defoaming assembly includes the lifting block of being slidably arranged on stirring assembly, lifting block is connected with drive assembly;Lifting block is fixed with several equidistantly arranged defoaming rake, defoaming rake is provided with several cutters, cutter is communicated with defoaming rake inner cavity.The present application is compact in structure, uses the way of physical defoaming and chemical defoaming to defoam super stable foam generated in raw coal cleaning process, and the efficiency of defoaming is high, the effect of defoaming is good, reduce the damage of foam to equipment, improve the efficiency and effect of coal washing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mineral processing flotation, and particularly relates to a combined defoaming device for super-stable flotation clean coal foam. BACKGROUND

[0002] At present, in the process of raw coal flotation, a large amount of flotation reagents capable of changing the surface properties of raw coal and improving the stability of flotation bubbles is needed to improve the flotation efficiency of clean coal; however, excessive flotation reagents lead to the emergence of super-stable flotation foam, which brings great challenges to the safe production of enterprises and the clean and efficient utilization of coal. Some stable flotation foam will float on the sedimentation tank, which will cause the sedimentation efficiency of the sedimentation tank to decrease year by year; some stable flotation foam will enter the pipeline with the ore pulp or circulating water and cause pipeline blockage, thereby causing serious production safety problems; some stable flotation foam will enter the filter press, and the stable foam structure will hinder the loss of water and reduce the dehydration efficiency; therefore, eliminating such stable flotation foam has important practical significance for realizing the efficient utilization of coal and minerals.

[0003] To deal with such situations, coal preparation plants mainly use physical defoaming methods, such as pressurized water to flush these stable flotation foam in order to break them, but these methods have low defoaming efficiency, high energy consumption, incomplete defoaming and other disadvantages. Many unbroken foams will gather together again, and manual salvage is necessary in some cases, but this method has high labor intensity, and the salvaged clean coal cannot be effectively treated. Sometimes, enterprises can only reduce the addition of flotation reagents or stop production to deal with such problems, but the current treatment methods greatly reduce the production efficiency and coal recovery rate of enterprises, which is not conducive to the clean and efficient utilization of coal.

[0004] Therefore, the application designs a combined defoaming device for super-stable flotation clean coal foam to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the application provides a combined defoaming device for super-stable flotation clean coal foam.

[0006] To achieve the above purpose, the application provides a combined defoaming device for super-stable flotation clean coal foam, which comprises a support, a defoaming cylinder is arranged on the support, and a defoaming mechanism is arranged in the defoaming cylinder.

[0007] The defoaming mechanism comprises a driving assembly arranged at the top end of the defoaming cylinder, and a stirring assembly extending into the defoaming cylinder is drivingly connected to the output end of the driving assembly; a defoaming assembly is arranged on the stirring assembly, and the defoaming assembly is drivingly connected to the driving assembly.

[0008] The defoaming assembly comprises a lifting block slidingly arranged on the stirring assembly, and the lifting block is in transmission connection with the driving assembly; a plurality of equidistantly arranged defoaming rakes are fixedly connected to the lifting block, and a plurality of cutters are arranged on the defoaming rakes and in communication with the inner cavities of the defoaming rakes.

[0009] Preferably, the defoaming rakes comprise defoaming rods fixedly connected to the lifting block, the defoaming rods are located above the water surface of the defoaming cylinder, and the bottom ends of the defoaming rods are provided with a plurality of rake teeth.

[0010] Preferably, a first cavity for distributing defoaming agent is arranged in the lifting block, the first cavity is in communication with an equipment for containing defoaming agent outside through an extension pipe, the first cavity is in communication with a second cavity arranged in the inner cavity of the defoaming rod, and the cutters are in communication with the second cavity.

[0011] Preferably, the stirring assembly comprises a stirring shaft in transmission connection with the driving assembly, a lifting screw is rotationally connected in the stirring shaft, a plurality of lifting rings slidingly arranged in the inner cavity of the stirring shaft are threadedly connected to the lifting screw, and the outer wall of the lifting ring protrudes out of the stirring shaft and is in transmission connection with the inner ring of the lifting block.

[0012] Preferably, the top end of the lifting screw is in transmission connection with a first gear, the first gear is in meshing transmission with a second gear rotationally connected to the stirring shaft, the second gear protrudes out of the stirring shaft and is in meshing transmission with a third gear, and the third gear is in transmission connection with the driving assembly.

[0013] Preferably, the driving assembly comprises a driving motor, the output end of the driving motor is in transmission connection with the top end of the stirring shaft through an output shaft, a fifth gear is slidingly arranged on the output shaft, the fifth gear is in transmission connection with a fourth gear, and the fourth gear is in transmission connection with the third gear.

[0014] Preferably, a ring-shaped first guide groove is arranged at the top end of the fifth gear, a plurality of extension rods are fixedly connected to the bottom end of a mounting plate for mounting the driving motor, the movable ends of the extension rods downwardly and fixedly connected with first guide blocks, the first guide blocks protrude out of the first guide groove and are in sliding connection with the first guide groove.

[0015] Preferably, a walking channel is arranged at the top end of the defoaming cylinder, a feeding pipe is mounted on the walking channel, the mounting plate is fixedly mounted at the top end of the feeding pipe, the output shaft extends into the feeding pipe, and the bottom end of the feeding pipe penetrates through the walking channel and extends into the defoaming cylinder.

[0016] Preferably, the defoaming cylinder comprises a conical cylinder arranged on the support, a cylindrical cylinder is fixedly connected to the top end of the conical cylinder, and the lifting range of the lifting block does not exceed the cylindrical cylinder.

[0017] Preferably, the stirring shaft is fixed with a plurality of stirring rods in the area of the conical cylinder, and the stirring rods are fixed with stirring teeth at the end away from the stirring shaft.

[0018] Compared with the prior art, the application has the following advantages and technical effects: the application discloses a combined defoaming device for super-stable flotation clean coal foam, a support is used for fixing the whole device on a workshop to ensure the stability of operation; during operation, water that needs to be defoamed is introduced into the defoaming cylinder, and defoaming is performed by the defoaming mechanism in the defoaming cylinder; during use, the driving assembly drives the stirring assembly in the defoaming cylinder to rotate, the liquid in the defoaming cylinder is stirred, the light foam is lifted to the water surface, the foam is prevented from sinking to the bottom of the water, and the quality of separation and defoaming is improved; the lifting block of the defoaming assembly slides on the stirring assembly and can drive the defoaming rake to be maintained on the water surface to be adjusted flexibly, meanwhile, the stirring assembly drives the defoaming rake to rotate, the foam on the water surface is physically stirred and broken, and physical defoaming is realized; meanwhile, the cutter on the defoaming rake is in communication with the inner cavity of the defoaming rake and can spray the defoaming agent, the surface of the raw coal is modified, the separation and breaking of the foam are accelerated, meanwhile, the defoaming agent of the cutter is high-pressure selected and sprayed, the foam can be physically sheared and cut, the stirring and shearing effects are achieved, the breaking is accelerated, and finally, the super-stable flotation clean coal foam is defoamed under the dual effects of physical stirring and chemical modification.

[0019] The application has the advantages of compact structure, high defoaming efficiency, good defoaming effect, reduced damage of the foam to the equipment, and improved washing efficiency and effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and are incorporated herein for explanation by way of the non-limiting examples. In the drawings:

[0021] Figure 1 It is a shaft view of the combined defoaming device for super-stable flotation clean coal foam.

[0022] Figure 2 It is a structural schematic view of the combined defoaming device for super-stable flotation clean coal foam.

[0023] Figure 3 It is a partial enlarged view of A in the application. Figure 2

[0024] Figure 4 It is a partial enlarged view of B in the application. Figure 2

[0025] Figure 5 It is a structural schematic view of the driving assembly.​​

[0026] Figure 6 For the present invention Figure 5 A local enlarged view of C in the present invention;

[0027] Figure 7 For the present invention cutter structure schematic diagram;

[0028] In the figure: 1, support; 2, defoaming cylinder; 3, lifting block; 4, defoaming rake; 5, cutter; 6, defoaming rod; 7, rake teeth; 8, first cavity; 9, telescopic pipe; 10, second cavity; 11, stirring shaft; 12, lifting cavity; 13, lifting screw; 14, lifting ring; 15, connecting rod; 16, lifting groove; 17, first gear; 18, second gear; 19, third gear; 20, transmission groove; 21, transmission rod; 22, drive motor; 23, output shaft; 24, fourth gear; 25, fifth gear; 26, first guide groove; 27, telescopic rod; 28, first guide block; 29, second guide groove; 30, second guide block; 31, walking channel; 32, feed pipe; 33, mounting plate; 34, feed pipe; 35, conical cylinder; 36, cylindrical cylinder; 37, stirring rod; 38, stirring teeth; 39, first scraper; 40, discharge port; 41, body; 42, liquid inlet pipe; 43, liquid outlet pipe; 44, cutting pipe; 45, injection hole; 46, support plate; 47, control valve; 48, second scraper; 49, railing; 50, stabilizing plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] Referring to Figures 1-7 The present embodiment provides a combined defoaming device for super-stable flotation clean coal foam, which comprises a support 1, a defoaming cylinder 2 is arranged on the support 1, and a defoaming mechanism is arranged in the defoaming cylinder 2.

[0032] The defoaming mechanism comprises a driving assembly arranged at the top end of the defoaming cylinder 2, and a stirring assembly extending into the defoaming cylinder 2 is drivingly connected to the output end of the driving assembly; a defoaming assembly is arranged on the stirring assembly, and the defoaming assembly is drivingly connected with the driving assembly.

[0033] The defoaming assembly comprises a lifting block 3 slidingly arranged on the stirring assembly, and the lifting block 3 is in transmission connection with the driving assembly; a plurality of defoaming rakes 4 are fixedly connected to the lifting block 3 and are arranged at equal intervals; and a plurality of cutters 5 are arranged on the defoaming rakes 4 and are in communication with the inner cavities of the defoaming rakes 4.

[0034] The application discloses a combined defoaming device for super-stable flotation clean coal foam, and the bracket 1 is used for fixing the whole device on a workshop to ensure the stability of operation; during operation, water needing to be defoamed is introduced into the defoaming cylinder 2, and defoaming is performed by the defoaming mechanism in the defoaming cylinder 2; during use, the driving assembly drives the stirring assembly in the defoaming cylinder 2 to rotate, and the liquid in the defoaming cylinder 2 is stirred, so that the light foam is lifted to the water surface, the foam is prevented from sinking to the bottom of the water, and the quality of separation and defoaming is improved; the lifting block 3 of the defoaming assembly slides on the stirring assembly and can drive the defoaming rake 4 to be maintained on the water surface and be adjusted flexibly, meanwhile, the stirring assembly drives the defoaming rake 4 to rotate, the foam on the water surface is physically stirred and broken, and physical defoaming is realized; meanwhile, the cutters 5 on the defoaming rake 4 are in communication with the inner cavities of the defoaming rake 4, can spray defoaming agents, modify the surface of raw coal, accelerate the separation and breaking of the foam, the defoaming agents of the cutters 5 are high-pressure selected and sprayed, can physically shear and cut the foam, play the role of stirring and shearing, accelerate the breaking, and finally the super-stable flotation clean coal foam is defoamed under the dual action of physical stirring and chemical modification. The application has the advantages of compact structure, high defoaming efficiency and good defoaming effect, can reduce the damage of the foam to the equipment, and can improve the efficiency and effect of coal washing.

[0035] Further optimization scheme, the defoaming rake 4 includes a defoaming rod 6 fixedly connected to the lifting block 3, the defoaming rod 6 is located on the water surface of the defoaming cylinder 2, and a plurality of rake teeth 7 are arranged at the bottom end of the defoaming rod 6. The defoaming rake 4 is composed of the defoaming rod 6 fixedly connected with the plurality of rake teeth 7, during use, the stirring assembly drives the defoaming rod 6 to rotate through the lifting block 3, and then the rake teeth 7 stir and physically break the foam on the water surface, thereby reducing the foam; meanwhile, the lifting block 3 can drive the defoaming rod 6 to ascend and descend, so that the defoaming rod 6 can be adjusted to the water surface regardless of the position of the liquid surface in the defoaming cylinder 2, and the foam on the water surface can be eliminated.

[0036] Further, the edges of the rake teeth 7 in the embodiment can be designed to be sharp to improve the breaking effect on the foam.

[0037] Further, the rake teeth 7 in the embodiment can be arranged to be inclined, and the specific inclination angle and inclination direction can be selected according to actual conditions.

[0038] Further optimization scheme, the first cavity 8 for distributing defoaming agent is arranged in the lifting block 3, the first cavity 8 is communicated with the equipment containing defoaming agent outside through the telescopic pipe 9, the first cavity 8 is communicated with the second cavity 10 arranged in the inner cavity of the defoaming rod 6, and the cutter 5 is communicated with the second cavity 10.The defoaming agent is pumped into the first cavity 8 through the telescopic pipe 27, is evenly distributed into the second cavity 10 in the defoaming rod 6, and finally enters the cutter 5 from the second cavity 10, is sprayed out through the cutter 5, the high-speed defoaming agent water flow can not only physically impact the foam to play a defoaming role, simultaneously, the defoaming agent enters water, and coal particles can be hydrophilic, so that the ultra-stable flotation clean coal foam is destabilized, the generation of foam is reduced from the original, a chemical defoaming effect is played, and finally the ultra-stable flotation clean coal foam is defoamed under the dual action of physical stirring and chemical modification;The telescopic pipe 9 is arranged, so that the lifting block 3 can be stably connected during lifting, and the rotation of the stirring assembly is not affected.

[0039] Further, the defoaming agent of the embodiment is preferably 3.0mM surfactant sodium dodecyl sulfate solution.

[0040] Further, the cutter 5 of the embodiment includes a body 41 mounted on the defoaming rod 6, the body 41 is communicated with the second cavity 10 through the liquid inlet pipe 42, the defoaming agent enters the body 41 from the liquid inlet pipe 42, enters the liquid outlet pipe 43 rotatingly connected to the body 41 after the control valve 47, and is finally sprayed out from the cutting pipe 44 on the side wall of the liquid outlet pipe 43, so that the properties of the raw coal surface can be handled.

[0041] Further, the cutting pipe 44 of the embodiment is provided with a plurality of spray holes 45 in the side wall, the recoil force generated by the high-speed spraying defoaming agent makes the liquid outlet pipe 43 rotate on the body 41, so that the defoaming agent forms a high-speed rotating liquid column, plays a stirring and shearing role on the flotation clean coal foam, speeds up the rupture, and also can increase the uniformity of defoaming agent spraying.

[0042] Further optimization scheme, the stirring assembly includes stirring shaft 11 which is in transmission connection with the driving assembly, lifting screw 13 which is rotatably connected in the stirring shaft 11, a plurality of lifting rings 14 which are threadedly connected on the lifting screw 13 and are slidably arranged in the inner cavity of the stirring shaft 11, and the outer wall of the lifting ring 14 extends out of the stirring shaft 11 and is in transmission connection with the inner ring of the lifting block 3. The stirring shaft 11 is rotated under the driving of the driving assembly, thereby driving the defoaming rake 4 to rotate and realizing physical defoaming; meanwhile, the lifting cavity 12 is formed in the stirring shaft 11, the lifting screw 13 is rotatably arranged in the lifting cavity 12 and is in transmission connection with the driving assembly, when the lifting block 3 needs to be lifted, the driving assembly drives the lifting screw 13 to rotate in the lifting cavity 12, thereby making the lifting ring 14 which is threadedly connected on the lifting screw 13 move in the lifting cavity 12, the connecting rod 15 of the outer wall of the lifting ring 14 passes through the lifting groove 16 on the stirring shaft 11 and is fixedly connected with the inner wall of the lifting block 3, thereby driving the lifting block 3 to lift and adjusting the position of the defoaming rake 4.

[0043] Further optimization scheme, the top end of the lifting screw 13 is in transmission connection with the first gear 17, the first gear 17 is in meshing transmission with the second gear 18 which is rotatably connected on the stirring shaft 11, the second gear 18 extends out of the stirring shaft 11 and is in meshing transmission with the third gear 19, and the third gear 19 is in transmission connection with the driving assembly; the driving assembly includes the driving motor 22, the output end of the driving motor 22 is in transmission connection with the top end of the stirring shaft 11 through the output shaft 23, the fifth gear 25 is slidably arranged on the output shaft 23, the fifth gear 25 is in transmission connection with the fourth gear 24, and the fourth gear 24 is in transmission connection with the third gear 19. The driving motor 22 drives the rotating shaft to rotate, serving as the power for physical defoaming; meanwhile, the output shaft 23 of the driving motor 22 drives the fifth gear 25 to rotate, thereby driving the fourth gear 24 which is in meshing transmission therewith to rotate, the fourth gear 24 drives the third gear 19 to rotate through the transmission rod 21, and finally drives the lifting screw 13 to rotate through the meshing arranged second gear 18 and first gear 17, thereby providing power for the lifting of the lifting block 3.

[0044] Further, the transmission groove 20 is formed in the stirring shaft 11, the second gear 18 is rotatably arranged in the transmission groove 20, thereby realizing the fixation of the second gear 18; the edge of the second gear 18 extends out of both sides of the transmission groove 20, thereby facilitating transmission.

[0045] Further, the side wall of the stirring shaft 11 is fixedly connected with the support plate 46, and the bottom end of the transmission shaft is rotatably connected on the support plate 46, thereby serving as the support position of the transmission shaft.

[0046] Further, the side wall of the stirring shaft 11 is fixedly connected with the stabilizing plate 50, and the transmission shaft passes through the stabilizing plate 50, thereby being used for stabilizing the transmission shaft.

[0047] Further, the bottom end of the mounting plate 33 is provided with a second guide groove 29 arranged in a ring shape, and a second guide block 30 is slidably arranged in the second guide groove 29. The top end of the transmission rod 21 is rotatably connected to the second guide block 30, so that the two ends of the transmission rod 21 are fixed. At the same time, when the stirring shaft 11 drives the transmission shaft to revolve, the second guide groove coincides with the revolving track of the transmission shaft.

[0048] Further optimization scheme, the top end of the fifth gear 25 is provided with a first guide groove 26 arranged in a ring shape. The bottom end of the mounting plate 33 is fixedly connected with a plurality of telescopic rods 27. The movable end of each telescopic rod 27 is downwardly fixedly connected with a first guide block 28. The first guide block 28 extends out of the first guide groove 26 and is slidably connected with the first guide groove 26. The plurality of telescopic rods 27 are equidistantly arranged at the bottom end of the mounting plate 33. The telescopic end of each telescopic rod 27 is connected with the first guide groove 26 through the first guide block 28, which does not affect the transmission of the fifth gear 25. The fifth gear 25 can also be driven to ascend and descend through the telescopic rod 27. When the fifth gear 25 ascends and descends, the fifth gear 25 can be engaged with and separated from the fourth gear 24. The fifth gear 25 can provide power for the ascending and descending of the lifting block 3 when it is necessary to adjust.

[0049] Further, the fifth gear 25 of the embodiment is assembled with the output shaft 23 through a prismatic inner hole. At this time, the output shaft 23 is arranged in a matching prismatic shape within the ascending and descending range of the fifth gear 25. When the output shaft 23 drives the fifth gear 25 to ascend and descend, the output shaft 23 synchronously drives the fifth gear 25 to rotate.

[0050] Further, the inner hole of the fifth gear 25 of the embodiment can also be provided with a protruding lug. The lug is matched with a groove arranged longitudinally on the output shaft 23. The lug is clamped into the groove and is slidably connected. The lug can ensure that the output shaft 23 drives the fifth gear 25 to rotate without slipping, and does not limit the ascending and descending of the fifth gear 25.

[0051] Further optimization scheme, the top end of the mounting plate 33 is provided with a second guide groove 29 arranged in a ring shape, and a second guide block 30 is slidably arranged in the second guide groove 29. The top end of the transmission rod 21 is rotatably connected to the second guide block 30, so that the two ends of the transmission rod 21 are fixed. At the same time, when the stirring shaft 11 drives the transmission shaft to revolve, the second guide groove coincides with the revolving track of the transmission shaft.

[0052] Further, the two sides of the walking channel 31 are provided with railings 49 to improve safety.

[0053] Further optimization scheme, the defoaming cylinder 2 includes the tapered cylinder 35 arranged on the support 1, the top end of the tapered cylinder 35 is fixedly connected with the cylindrical cylinder 36, the lifting range of the lifting block 3 does not exceed the cylindrical cylinder 36. The tapered cylinder 35 is inverted conical, the tip is downward and is provided with a discharge port 40 for discharging the treated coal water; and during treatment, the top end liquid level of the coal water needs to be higher than the tapered cylinder 35 and enter the cylindrical cylinder 36, the lifting block 3 can be lifted in the range of the cylindrical cylinder 36, thereby ensuring that the cutter 5 can enter the foam.

[0054] Further, the defoaming rod 6 is fixedly connected with the first scraper 39 away from the stirring shaft 11, the first scraper 39 slides with the inner wall of the cylindrical cylinder 36, so that the defoaming rod 6 can scrape and wash the inner wall of the cylindrical cylinder 36 when rotating, and the foam adhered to the inner wall is scraped off, improving the efficiency and quality of defoaming.

[0055] Further optimization scheme, the stirring shaft 11 is fixedly connected with a plurality of stirring rods 37 in the region of the tapered cylinder 35, and the stirring rod 37 is fixedly connected with the stirring teeth 38 away from the stirring shaft 11. In the embodiment, a plurality of stirring rods 37 are arranged on the stirring shaft 11, driving the stirring teeth 38 to stir the coal water in the tapered cylinder 35, accelerating the mixing of the defoaming agent and the coal water, so that the surface of the raw coal reacts with the defoaming agent, and the stirring also accelerates the separation of the raw coal and the foam on the surface, improving the efficiency of defoaming.

[0056] Further, the bottom end of the stirring shaft 11 of the embodiment is fixedly connected with a plurality of second scrapers 48 arranged at equal intervals, the outer wall of the second scraper 48 is in sliding contact with the bottom end side wall of the tapered cylinder 35, thereby cleaning the inner wall of the tapered cylinder 35, avoiding accumulation when discharging the material from the discharge port 40, and also avoiding blockage of solid materials at the discharge port, improving the smoothness of discharge.

[0057] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0058] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A combined defoaming device for ultra-stable flotation concentrate froth, characterized in that: The utility model provides a kind of antifoam device, including support (1), antifoam cylinder (2) is provided on the support (1), antifoam mechanism is provided in the antifoam cylinder (2); The antifoam mechanism includes drive assembly provided at the top of the antifoam cylinder (2), the output end of the drive assembly is drivingly connected with stirring assembly extending into the antifoam cylinder (2);The stirring assembly is provided with an antifoam assembly, and the antifoam assembly is drivingly connected with the drive assembly; The antifoam assembly includes a lifting block (3) slidingly disposed on the stirring assembly, and the lifting block (3) is drivingly connected with the drive assembly;A plurality of equally spaced antifoam harrows (4) are fixedly connected to the lifting block (3), and a plurality of cutters (5) are provided on the antifoam harrows (4), and the cutters (5) are in communication with the inner cavities of the antifoam harrows (4); The antifoam harrow (4) includes an antifoam rod (6) fixedly connected to the lifting block (3), and the antifoam rod (6) is located above the water surface of the antifoam cylinder (2), and a plurality of harrow teeth (7) are provided at the bottom end of the antifoam rod (6); The stirring assembly includes a stirring shaft (11) drivingly connected with the drive assembly, a lifting screw (13) rotatably connected in the stirring shaft (11), a plurality of lifting rings (14) threadedly connected to the lifting screw (13) and slidingly disposed in the inner cavity of the stirring shaft (11), and the outer wall of the lifting ring (14) extends out of the stirring shaft (11) and is drivingly connected with the inner ring of the lifting block (3); The top end of the lifting screw (13) is drivingly connected with a first gear (17), the first gear (17) is in meshing transmission with a second gear (18) rotatably connected to the stirring shaft (11), the second gear (18) extends out of the stirring shaft (11) and is in meshing transmission with a third gear (19), and the third gear (19) is drivingly connected with the drive assembly; The drive assembly includes a drive motor (22), the output end of the drive motor (22) is drivingly connected with the top end of the stirring shaft (11) through an output shaft (23), a fifth gear (25) is slidingly disposed on the output shaft (23), the fifth gear (25) is drivingly connected with a fourth gear (24), and the fourth gear (24) is drivingly connected with the third gear (19); A first guide groove (26) is formed at the top end of the fifth gear (25), a plurality of telescopic rods (27) are fixedly connected to the bottom end of the mounting plate (33) for mounting the drive motor (22), the movable ends of the telescopic rods (27) downwardly and are fixedly connected with first guide blocks (28), the first guide blocks (28) extend out of the first guide groove (26) and are slidingly connected with the first guide groove (26).

2. The combined defoaming device of ultra-stable flotation clean coal froth according to claim 1, characterized in that: A first cavity (8) for distributing antifoam agent is formed in the lifting block (3), the first cavity (8) is in communication with an equipment outside for containing antifoam agent through a telescopic tube (9), the first cavity (8) is in communication with a second cavity (10) formed in the inner cavity of the antifoam rod (6), and the cutters (5) are in communication with the second cavity (10).

3. The combination defoaming device for ultra-stable flotation concentrate froth of claim 1, wherein: The top end of the defoaming cylinder (2) is provided with a walking channel (31), a feeding pipe (32) is installed on the walking channel (31), the mounting plate (33) is fixedly installed at the top end of the feeding pipe (32), the output shaft (23) extends into the feeding pipe (32), and the bottom end of the feeding pipe (32) penetrates through the walking channel (31) and extends into the defoaming cylinder (2).

4. The combination defoaming device for ultra-stable flotation concentrate froth of claim 1, wherein: The defoaming cylinder (2) comprises a conical cylinder (35) arranged on the support (1), the top end of the conical cylinder (35) is fixedly connected with a cylindrical cylinder (36), and the lifting range of the lifting block (3) does not exceed the cylindrical cylinder (36).

5. The combined defoaming device of the ultra-stable flotation concentrate froth according to claim 4, characterized in that: The stirring shaft (11) is fixedly connected with a plurality of stirring rods (37) in the region of the conical cylinder (35), and the stirring rod (37) is fixedly connected with a stirring tooth (38) at the end away from the stirring shaft (11).

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