Device for eliminating fat coal secondary foam

Abstract

The invention discloses a device for eliminating fat coal secondary foam, and relates to the technical field of devices for eliminating fat coal secondary foam, the device for eliminating fat coal secondary foam comprises a defoaming sedimentation main frame body, and a deposition discharge mechanism is fixedly installed on the defoaming sedimentation main frame body; a plurality of defoaming devices are fixedly mounted at the upper end of the defoaming sedimentation main frame body; according to the device, negative pressure foam suction is adopted, the foam suction seat can actively capture deep sticky foam, and the foam is prevented from being accumulated in the defoaming sedimentation hopper; the composite blade structure of the defoaming impeller can effectively tear a stable liquid film of fat coal secondary foam, solves the problems of repeated generation and incomplete breaking of foam in traditional spraying defoaming and simple stirring defoaming, and realizes thorough breaking of high-viscosity fat coal secondary foam.

Description

Technical Field

[0001] This invention specifically relates to the technical field of devices for eliminating secondary foam in coking coal, and more specifically to a device for eliminating secondary foam in coking coal. Background Technology

[0002] In the process of washing and processing coking coal, a large amount of secondary foam is easily generated during the flotation stage. This type of foam is characterized by high viscosity, high stability, and difficulty in natural breakage. If it cannot be eliminated in a timely and effective manner, it will seriously affect the normal operation of the coal washing system. Currently, traditional defoaming methods mostly use spray defoaming, mechanical stirring defoaming, or chemical defoaming, all of which have obvious limitations in practical applications. Spray defoaming only acts on the surface of the foam and is ineffective in breaking down secondary foam in deep and high-viscosity coking coal, and the foam is prone to repeated generation. Conventional mechanical defoaming devices have a simple structure and lack a targeted integrated structure for foam absorption and breaking, resulting in incomplete foam treatment. Foam can easily accumulate and overflow inside the equipment, causing coal slurry loss and a dirty working environment. Although chemical defoaming is faster, it increases production costs, and residual chemicals may affect coal quality and subsequent water recycling, which does not meet the requirements of energy-saving and environmentally friendly production.

[0003] Meanwhile, existing defoaming equipment generally suffers from poor solid-liquid separation and inefficient sediment discharge. Coal froth contains a large amount of coal slime particles; after defoaming, these fine particles easily settle at the bottom of the equipment. Traditional flat-bottom or simple conical-bottom structures easily create dead zones for slime accumulation, leading to internal blockages, reduced effective volume, and a continuous decline in defoaming efficiency over long-term operation. While some equipment has discharge structures, they are mostly direct discharge types, unable to achieve continuous and stable transport, requiring shutdown for cleaning and affecting production line continuity. Furthermore, most defoaming devices lack modular and array-style layout designs; the processing capacity of a single defoamer is limited, making it difficult to adapt to large-scale coal flotation production lines. Installation and maintenance are inconvenient, overall structural stability is insufficient, and overflow clean water collection is disordered, failing to achieve effective clean water reuse and compliant discharge. Summary of the Invention

[0004] The purpose of this invention is to provide a device for eliminating secondary foam in coking coal. By installing multiple defoamers with the defoaming sedimentation main frame and then installing the sedimentation discharge mechanism with the defoaming sedimentation main frame, the device for eliminating secondary foam in coking coal is improved in terms of defoaming efficiency, slag discharge smoothness, structural stability, and environmental and economic efficiency, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A device for eliminating secondary foam in coking coal, comprising: The defoaming sedimentation main frame is equipped with a sedimentation discharge mechanism; multiple defoamers are fixedly installed at the upper end of the defoaming sedimentation main frame. The defoamer includes a defoaming drive motor, the lower end of which is connected to the upper end of the connecting seat via a flange that fits into the connecting seat, and the connecting seat has an internal cavity. The lower end of the connecting seat is fixedly connected to the upper surface of the defoaming shell, and a bearing is installed at the center of the upper end of the defoaming shell. The defoaming shell has a defoaming chamber inside, and the lower end of the defoaming shell is fixedly connected to the upper end of a fixed connecting rod arranged in a ring array. The lower end of the fixed connecting rod arranged in a ring array is fixedly connected to the lower end of the bubble suction seat, and the bubble suction seat has a bubble suction port.

[0006] As a further technical solution of the present invention, the lower end of the defoaming drive motor is connected to the transmission shaft, and the lower end of the transmission shaft is connected to the defoaming impeller through a bearing provided at the center of the upper end of the defoaming shell. The defoaming impeller is located in the defoaming cavity provided inside the defoaming shell. The lower end of the defoaming impeller is correspondingly provided with the suction port provided on the suction seat. A one-way exhaust valve is installed at the top of the defoaming shell, and the exhaust direction of the one-way exhaust valve is from the inside to the outside.

[0007] As a further technical solution of the present invention, the lower surface of the connecting flange provided at the upper end of the connecting seat is fixedly connected to the annular mounting seat provided on the defoamer mounting frame 1, and the mounting seat is located in the middle of the defoamer mounting frame 1; the defoamer mounting frame 1 is arranged in a rectangular array, and both ends of the defoamer mounting frame 1 are fixedly connected to the inner sides of both ends of the top mounting frame.

[0008] As a further technical solution of the present invention, the defoamer mounting brackets arranged in a rectangular array are arranged in sequence with defoamer mounting brackets two and three; the defoamer mounting brackets two and three are also provided with annular mounting seats, and the upper surface of the annular mounting seats on the defoamer mounting brackets two and three is fixedly connected to the lower surface of the connecting flange provided at the upper end of the connecting seat.

[0009] As a further technical solution of the present invention, the annular mounting seats provided on the defoamer mounting bracket 2 and the defoamer mounting bracket 3 are respectively located on the left side of the middle and the right side of the middle; the two ends of the defoamer mounting bracket 2 and the defoamer mounting bracket 3 are fixedly connected to the inner sides of the two ends of the top mounting frame, and the top mounting frame is fixedly installed on the upper end of the defoaming settling hopper.

[0010] As a further technical solution of the present invention, the upper front side of the defoaming settling hopper is provided with an overflow guide plate, and the lower end of the defoaming settling hopper is conical; the defoaming settling hopper is fixedly installed inside the main support mounting frame; the front right side of the main support mounting frame is provided with a maintenance ladder.

[0011] As a further technical solution of the present invention, the lower end of the defoaming settling hopper is fixedly connected to the bottom spiral conveying mechanism, a spiral drive motor is fixedly installed at the rear end of the bottom spiral conveying mechanism, and a sealed connection channel is fixedly installed at the front end of the bottom spiral conveying mechanism, with the left side of the sealed connection channel fixedly connected to the lower end of the inclined spiral conveying mechanism.

[0012] As a further technical solution of the present invention, a spiral drive motor and a discharge pipe are fixedly installed on the upper end of the inclined spiral conveying mechanism; a connecting plate is provided on the upper end of the inclined spiral conveying mechanism, and the other end of the connecting plate is connected to the left side of the upper end of the defoaming sedimentation hopper.

[0013] As a further technical solution of the present invention, a screen is fixedly installed on the inner wall of the defoaming settling hopper and the outer side of the defoamer.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the device adopts negative pressure bubble suction, and the bubble suction seat can actively capture deep viscous foam to avoid foam accumulation in the defoaming settling hopper; the composite blade structure of the defoaming impeller can effectively tear the stable liquid film of secondary foam in coking coal, solving the problems of repeated foam generation and incomplete foam removal in traditional spray defoaming and simple stirring defoaming, and achieving complete removal of secondary foam in high-viscosity coking coal. 2. This invention achieves matrix installation of multiple defoamers through differentiated layouts of defoamer mounting bracket 1, defoamer mounting bracket 2, and defoamer mounting bracket 3, so that the defoaming area can fully cover the entire liquid surface of the defoaming settling hopper; at the same time, the number of defoamers can be flexibly started and stopped according to the amount of foam generated in actual production, so as to achieve precise matching between processing capacity and production load, and adapt to coking coal washing production lines of different scales. 3. The conical bottom design of the defoaming settling hopper in this invention allows sediment to naturally converge under gravity, avoiding the dead corners of sludge accumulation in traditional flat-bottom structures; the linkage design of the bottom spiral conveying mechanism and the inclined spiral conveying mechanism realizes continuous horizontal conveying and vertical lifting of sediment, replacing the traditional intermittent slag discharge method and significantly improving the continuity of the production line. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 In this invention Figure 1 Top view.

[0017] Figure 3 In this invention Figure 2 The left view.

[0018] Figure 4 In this invention Figure 2 Top view.

[0019] Figure 5 In this invention Figure 2 A partial breakdown diagram.

[0020] Figure 6 In this invention Figure 5 A schematic diagram of the split structure.

[0021] Figure 7 In this invention Figure 6 A partial sectional view.

[0022] In the diagram: 1-Defoaming sedimentation main frame, 2-Sedimentation discharge mechanism, 3-Defoamer; 11-Main support mounting frame, 12-Defoaming settling hopper, 13-Top mounting frame, 14-Defoamer mounting frame one, 15-Defoamer mounting frame two, 16-Defoamer mounting frame three, 17-Overflow guide plate, 18-Maintenance ladder, 19-Screen; 21-Bottom spiral conveying mechanism, 22-Spiral drive motor one, 23-Sealed connection channel, 24-Inclined spiral conveying mechanism, 25-Spiral drive motor two, 26-Discharge pipe, 27-Connecting plate; 31-Defoaming drive motor, 32-Connecting seat, 33-Defoaming shell, 34-Drive shaft, 35-Defoaming impeller, 36-Fixed connecting rod, 37-Foam suction seat, 38-One-way exhaust valve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-7 In this embodiment of the invention, a device for eliminating secondary foam in coking coal includes a defoaming sedimentation main frame 1, on which a sedimentation discharge mechanism 2 is fixedly installed; and multiple defoamers 3 are fixedly installed at the upper end of the defoaming sedimentation main frame 1. The defoamer 3 includes a defoaming drive motor 31, the lower end of which is connected to the upper end of the connecting flange of the connecting seat 32, and the connecting seat 32 has a cavity inside. The lower end of the connecting seat 32 is fixedly connected to the upper surface of the defoaming shell 33, and a bearing is installed at the center of the upper end of the defoaming shell 33. The defoaming shell 33 has a defoaming cavity inside, and the lower end of the defoaming shell 33 is fixedly connected to the upper end of the fixed connecting rods 36 arranged in a ring array. The lower end of the fixed connecting rods 36 arranged in a ring array is fixedly connected to the lower end of the bubble suction seat 37, and the bubble suction seat 37 has a bubble suction port. The lower end of the defoaming drive motor 31 is connected to the transmission shaft 34. The lower end of the transmission shaft 34 is connected to the defoaming impeller 35 through a bearing located at the center of the upper end of the defoaming housing 33. The defoaming impeller 35 is located inside the defoaming chamber of the defoaming housing 33. The lower end of the defoaming impeller 35 is correspondingly arranged with the suction port on the suction seat 37. A one-way exhaust valve 38 is installed at the top of the defoaming housing 33, and the exhaust direction of the one-way exhaust valve 38 is from the inside to the outside.

[0025] By adopting the above technical solution, the device uses negative pressure bubble suction. The bubble suction seat 37 can actively capture deep viscous foam and prevent foam from accumulating in the defoaming settling hopper 12. The composite blade structure of the defoaming impeller 35 can effectively tear the stable liquid film of secondary foam in coking coal, solving the problems of repeated foam generation and incomplete foam removal in traditional spray defoaming and simple stirring defoaming, and achieving complete removal of secondary foam in high-viscosity coking coal. Furthermore, the one-way exhaust valve 38 is used to maintain the negative pressure of the defoamer 3 during operation, because to maintain a stable negative pressure, there must be both air intake and exhaust at the same time, and the exhaust volume must be greater than the air intake volume.

[0026] In this embodiment, the lower surface of the connecting flange provided at the upper end of the connecting seat 32 is fixedly connected to the annular mounting seat provided on the defoamer mounting bracket 14, and the mounting seat is located in the middle of the defoamer mounting bracket 14; the defoamer mounting bracket 14 is arranged in a rectangular array, and both ends of the defoamer mounting bracket 14 are fixedly connected to the inner sides of both ends of the top mounting frame 13. Defoamer mounting bracket 14 arranged in a rectangular array is provided with defoamer mounting bracket 2 15 and defoamer mounting bracket 3 16 in sequence; defoamer mounting bracket 2 15 and defoamer mounting bracket 3 16 are also provided with annular mounting seats, and the upper surface of the annular mounting seats on defoamer mounting bracket 2 15 and defoamer mounting bracket 3 16 is fixedly connected to the lower surface of the connecting flange provided at the upper end of the connecting seat 32. The annular mounting seats on the defoamer mounting bracket 2 15 and the defoamer mounting bracket 3 16 are respectively located on the left and right sides of the middle part; the two ends of the defoamer mounting bracket 2 15 and the defoamer mounting bracket 3 16 are fixedly connected to the inner sides of the two ends of the top mounting frame 13, and the top mounting frame 13 is fixedly installed on the upper end of the defoaming settling hopper 12. The defoaming settling hopper 12 is provided with an overflow guide plate 17 on the upper front side, and the lower end of the defoaming settling hopper 12 is tapered; the defoaming settling hopper 12 is fixedly installed inside the main support mounting frame 11; the main support mounting frame 11 is provided with a maintenance ladder 18 on the front right side.

[0027] By adopting the above technical solution, through the differentiated layout of defoamer mounting bracket 14, defoamer mounting bracket 25, and defoamer mounting bracket 36, a matrix installation of multiple defoamers 3 can be achieved, and the defoaming area can fully cover the entire liquid surface of the defoaming settling hopper 12. At the same time, the number of defoamers 3 can be flexibly started and stopped according to the amount of foam generated in actual production, so as to achieve precise matching between processing capacity and production load and adapt to coal washing production lines of different scales.

[0028] In this embodiment, the lower end of the defoaming settling hopper 12 is fixedly connected to the bottom spiral conveying mechanism 21. A spiral drive motor 22 is fixedly installed at the rear end of the bottom spiral conveying mechanism 21, and a sealed connection channel 23 is fixedly installed at the front end of the bottom spiral conveying mechanism 21. The left side of the sealed connection channel 23 is fixedly connected to the lower end of the inclined spiral conveying mechanism 24. The inclined spiral conveying mechanism 24 is fixedly installed with a spiral drive motor 25 and a discharge pipe 26 at its upper end; the inclined spiral conveying mechanism 24 is provided with a connecting plate 27 at its upper end, and the other end of the connecting plate 27 is connected to the upper left side of the defoaming sedimentation hopper 12.

[0029] By adopting the above technical solutions, the conical bottom design of the defoaming settling hopper 12 allows the sediment to naturally converge under the action of gravity, avoiding the dead corners of mud accumulation in the traditional flat-bottom structure; the linkage design of the bottom spiral conveying mechanism 21 and the inclined spiral conveying mechanism 24 realizes the continuous operation of horizontal conveying and vertical lifting of sediment, replacing the traditional intermittent slag discharge method and significantly improving the continuity of the production line.

[0030] By adopting the above technical solution, a screen 19 is fixedly installed on the inner wall of the defoaming settling hopper 12 and the outer side of the defoamer 3; By adopting the above technical solution, the screen 19 set on the outside of the defoamer 3 can drive the surrounding water to move towards the defoamer 3 during the negative pressure generated by the operation of the defoamer 3. At the same time, a part of the foam slurry can undergo initial defoaming treatment when passing through the screen 19.

[0031] The working principle of this invention is as follows: After the secondary foam slurry of coking coal enters the defoaming settling hopper 12, the defoamers 3 arranged in an array on the defoamer mounting frame 14, the defoamer mounting frame 25, and the defoamer mounting frame 36 start synchronously; the defoaming drive motor 31 drives the defoaming impeller 35 to rotate at high speed through the transmission shaft 34, forming a negative pressure at the foam suction seat 37, and actively sucking the foam into the defoaming chamber inside the defoaming shell 33; During this process, the screen 19 set outside the defoamer 3 can drive the surrounding water flow towards the defoamer 3 when the defoamer 3 is working and generating negative pressure. While moving, some foam slurry can undergo initial defoaming treatment when passing through the screen 19. The high-speed rotating defoaming impeller 35 performs strong shearing, impact and breakage on the foam, causing the foam to break down quickly and achieving separation of slurry and gas; After defoaming, the mixture is allowed to settle in the defoaming settling hopper 12. Solid particles such as coal slime settle to the conical bottom of the hopper 12 under gravity, forming clear water on top. This clear water overflows in an orderly manner through the overflow guide plate 17 and can be recycled back to the coal washing system. The coal slime that settles to the bottom of the defoaming settling hopper 12 enters the bottom screw conveyor 21 and is conveyed forward by the screw drive motor 22. It then enters the inclined screw conveyor 24 through the sealed connection channel 23. The screw drive motor 25 drives the inclined screw conveyor 24 to lift the sediment and discharge it stably through the discharge pipe 26, achieving continuous slag discharge. The main support mounting frame 11 provides stable support for the defoaming and settling main frame 1 and all internal components. The top mounting frame 13 ensures the structural strength of the defoamer mounting frame. The maintenance ladder 18 facilitates personnel to perform daily maintenance and repair on the equipment. The device uses negative pressure bubble suction. The bubble suction seat 37 can actively capture deep viscous foam and prevent foam from accumulating in the defoaming settling hopper 12. The composite blade structure of the defoaming impeller 35 can effectively tear the stable liquid film of secondary foam in coking coal, solving the problems of repeated foam generation and incomplete foam removal in traditional spray defoaming and simple stirring defoaming, and achieving complete removal of secondary foam in high-viscosity coking coal. Through the differentiated layout of defoamer mounting bracket 14, defoamer mounting bracket 25, and defoamer mounting bracket 36, a matrix installation of multiple defoamers 3 can be achieved, and the defoaming area can fully cover the entire liquid surface of the defoaming settling hopper 12. At the same time, the number of defoamers 3 can be flexibly started and stopped according to the amount of foam generated in actual production, so as to achieve precise matching between processing capacity and production load and adapt to different scales of coal washing and beneficiation production lines. The conical bottom design of the defoaming settling hopper 12 allows sediments to naturally converge under gravity, avoiding the dead corners of sludge accumulation in traditional flat-bottom structures. The linkage design of the bottom spiral conveying mechanism 21 and the inclined spiral conveying mechanism 24 enables continuous horizontal conveying and vertical lifting of sediments, replacing the traditional intermittent slag discharge method and significantly improving the continuity of the production line.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for eliminating secondary foam in coking coal, characterized in that: include The defoaming sedimentation main frame (1) is fixedly installed with a sedimentation discharge mechanism (2); multiple defoamers (3) are fixedly installed at the upper end of the defoaming sedimentation main frame (1). The defoamer (3) includes a defoaming drive motor (31), the lower end of which is connected to the flange of the upper end of the connecting seat (32), and the connecting seat (32) has a cavity inside; the lower end of the connecting seat (32) is fixedly connected to the upper surface of the defoaming shell (33), and a bearing is installed at the center of the upper end of the defoaming shell (33); the defoaming shell (33) has a defoaming cavity inside, and the lower end of the defoaming shell (33) is fixedly connected to the upper end of the fixed connecting rod (36) arranged in a ring array, and the lower end of the fixed connecting rod (36) arranged in a ring array is fixedly connected to the lower end of the bubble suction seat (37), and the bubble suction seat (37) has a bubble suction port.

2. The apparatus for eliminating secondary foam in coking coal according to claim 1, characterized in that: The lower end of the defoaming drive motor (31) is connected to the transmission shaft (34). The lower end of the transmission shaft (34) is connected to the defoaming impeller (35) through a bearing located at the center of the upper end of the defoaming housing (33). The defoaming impeller (35) is located in the defoaming chamber inside the defoaming housing (33). The lower end of the defoaming impeller (35) is correspondingly set with the suction port on the suction seat (37). A one-way exhaust valve (38) is installed at the top of the defoaming housing (33), and the exhaust direction of the one-way exhaust valve (38) is from the inside to the outside.

3. The apparatus for eliminating secondary foam in coking coal according to claim 1, characterized in that: The lower surface of the connecting flange at the upper end of the connecting seat (32) is fixedly connected to the annular mounting seat on the defoamer mounting frame (14), and the mounting seat is located in the middle of the defoamer mounting frame (14); the defoamer mounting frame (14) is arranged in a rectangular array, and both ends of the defoamer mounting frame (14) are fixedly connected to the inner sides of both ends of the top mounting frame (13).

4. The apparatus for eliminating secondary foam in coking coal according to claim 3, characterized in that: Defoamer mounting bracket one (14) arranged in a rectangular array is provided with defoamer mounting bracket two (15) and defoamer mounting bracket three (16) in sequence; defoamer mounting bracket two (15) and defoamer mounting bracket three (16) are also provided with annular mounting seats, and the upper surface of the annular mounting seats provided on defoamer mounting bracket two (15) and defoamer mounting bracket three (16) is fixedly connected to the lower surface of the connecting flange provided at the upper end of the connecting seat (32).

5. The apparatus for eliminating secondary foam in coking coal according to claim 4, characterized in that: The annular mounting seats on the defoamer mounting bracket two (15) and the defoamer mounting bracket three (16) are respectively located on the left side of the middle and the right side of the middle; the two ends of the defoamer mounting bracket two (15) and the defoamer mounting bracket three (16) are fixedly connected to the inner sides of the two ends of the top mounting frame (13), and the top mounting frame (13) is fixedly installed on the upper end of the defoaming settling hopper (12).

6. The apparatus for eliminating secondary foam in coking coal according to claim 5, characterized in that: The defoaming settling hopper (12) is provided with an overflow guide plate (17) on the front side of its upper end, and the lower end of the defoaming settling hopper (12) is set in a conical shape; the defoaming settling hopper (12) is fixedly installed inside the main support mounting frame (11); the main support mounting frame (11) is provided with a maintenance ladder (18) on the right side of its front end.

7. The apparatus for eliminating secondary foam in coking coal according to claim 6, characterized in that: The lower end of the defoaming settling hopper (12) is fixedly connected to the bottom spiral conveying mechanism (21). A spiral drive motor (22) is fixedly installed at the rear end of the bottom spiral conveying mechanism (21), and a sealed connection channel (23) is fixedly installed at the front end of the bottom spiral conveying mechanism (21). The left side of the sealed connection channel (23) is fixedly connected to the lower end of the inclined spiral conveying mechanism (24).

8. The apparatus for eliminating secondary foam in coking coal according to claim 7, characterized in that: The inclined spiral conveying mechanism (24) is fixedly installed with a spiral drive motor (25) and a discharge pipe (26) at its upper end; the inclined spiral conveying mechanism (24) is provided with a connecting plate (27) at its upper end, and the other end of the connecting plate (27) is connected to the upper left side of the defoaming sedimentation hopper (12).

9. The apparatus for eliminating secondary foam in coking coal according to claim 8, characterized in that: A screen (19) is fixedly installed on the inner wall of the defoaming settling hopper (12) and the outer side of the defoamer (3).

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