Defoaming device for coal mine preparation
By designing a defoaming device with scrapers and spray pipes on the scavenging machine, the problems of poor foam flowability and water waste were solved, achieving efficient coal recovery and energy conservation.
Patent Information
- Application Number
- CN202511956250.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-04-10
AI Technical Summary
Existing coal separators have poor foam flowability and are prone to clogging when processing residual coal particles. Furthermore, the foam treatment method is crude, resulting in low efficiency of water resource recycling and the loss of some coal resources.
Design a defoaming device, including a scraper and a spray pipe. The scraper removes foam and directs it into the spray pipe for defoaming. Combined with a separation mechanism for pressure filtration, it forms an internal circulation, reducing fresh water consumption and wastewater discharge.
It achieves continuous and stable foam scraping, improves coal recovery rate, reduces water consumption and treatment costs, reduces the load on subsequent water treatment systems, and extends the life of the equipment.
Smart Images
Figure CN121820067A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of coal mine separation, in particular to a defoaming device for coal mine preparation. BACKGROUND
[0002] In the field of coal mining and processing, flotation is one of the key processes for separating clean coal. The flotation machine makes coal particles selectively adhere to gas bubbles through the physical and chemical action of reagents, so that clean coal and gangue are separated. After the main flotation process, in order to maximize the recovery of coal resources, the coal-cement compound containing residual coal particles is usually sent to the flotation scavenger 100 for secondary separation to extract the remaining combustible material and achieve the goal of "eating dry and squeezing dry".
[0003] Since the scavenger handles the residual material after the main flotation, the separation accuracy requirement is relatively low. In this process, in order to enhance the coal particle capture effect, excessive addition of a foaming agent is often required, which leads to the formation of a large amount of foam on the liquid surface of the scavenger. These foams have high viscosity, poor stability, and contain a certain proportion of fine coal particles. At present, most scavengers still rely on natural overflow or simple scraper to discharge the foam, which has the problems of poor foam flowability, easy clogging, and difficulty in continuous and stable discharge.
[0004] In addition, the existing scavenger foam treatment method is relatively extensive. After the foam is discharged, it is usually directly introduced into the coal slurry water system, which not only increases the load of the subsequent equipment, causes low water resource recycling efficiency, but also causes part of the recoverable coal resources to be lost with the water body. SUMMARY
[0005] The purpose of the present application is to provide a defoaming device for coal mine preparation to solve the problems raised in the background.
[0006] To achieve the above purpose, the present application provides the following technical scheme: a defoaming device for coal mine preparation, comprising a flotation scavenger, further comprising:
[0007] A processing mechanism is arranged on the flotation scavenger, the processing mechanism comprises an annular carrier fixedly connected to the flotation scavenger, a baffle is fixedly connected to the inner wall of the annular carrier, a gas cylinder is fixedly connected to the surface of the annular carrier, and a fixed block is fixedly connected to the output end of the gas cylinder.
[0008] A defoaming piece is arranged on the annular carrier, the defoaming piece comprises a rotating drum rotatably connected to the annular carrier, a limiting rod is slidably connected to the inside of the rotating drum, a scraper for scraping the floating foam on the surface of the annular carrier is fixedly connected to the surface of the limiting rod, a spray pipe is fixedly connected to the surface of the scraper, a plurality of jet holes are obliquely arranged on the surface of the spray pipe, the floating foam scraped by the scraper is defoamed in the working state, and the end of the limiting rod is fixedly connected to the fixed block.
[0009] A driving member is arranged on the annular carrier;
[0010] A separating mechanism is arranged on the annular carrier and used for filtering the foam treated by the spray pipe.
[0011] The scraper is sleeved with a rubber strip on one side, and the scraper is not in contact with the baffle in the initial state and is in contact with the baffle through the rubber strip on the surface of the scraper in the working state.
[0012] The driving member comprises a motor one fixedly connected to the annular carrier, and the output end of the motor one is fixedly connected with a rotating cylinder, and the surface of the rotating cylinder is engaged with a synchronous belt.
[0013] The surface of the rotating cylinder is engaged with the synchronous belt, and the cross section of the scraper is inclined V-shaped from the connection position between the scraper and the rotating cylinder.
[0014] The separating mechanism comprises a storage cylinder fixedly connected to the annular carrier, a water pump fixedly connected to the surface of the storage cylinder, a pressing rod slidably connected to the inside of the storage cylinder, a rack structure arranged on the surface of the pressing rod, a small gear rotatably connected to the side of the storage cylinder close to the rack structure, a motor two fixedly connected to the surface of the storage cylinder and used for driving the small gear, a circular ring fixedly connected to the end of the pressing rod close to the barycenter of the earth, a detachable filter screen sleeved in the circular ring, and a rubber ring sleeved outside the circular ring and used for sealing.
[0015] The output end of the motor two is fixedly connected with the shaft of the small gear, and the surface of the small gear is engaged with the rack structure on the surface of the pressing rod.
[0016] The water pump is provided with a water inlet and a water outlet, the water inlet is connected with a pipeline one, and the water outlet is connected with a water outlet pipe.
[0017] The other end of the pipeline one penetrates through the storage cylinder and extends to a higher position in the internal cavity of the storage cylinder, the other end of the water outlet pipe is fixedly connected with the spray pipe, and the interiors of the two are connected.
[0018] When the scraper runs to the maximum stroke, the scraper forms an inclined sector cavity with the baffle, the sector cavity is taken as a starting horizontal line, and the height of the side close to the annular carrier is higher than the side far away from the shaft center of the annular carrier.
[0019] Compared with the prior art, the beneficial effects of the present application are:
[0020] 1. Through the setting of the processing mechanism, the scraper continuously scrapes the bubbles in the flotation scavenging machine in the way of "eating dry and squeezing dry", and after the scraper reaches the upper limit of storage, it is combined into a discharge slot towards the baffle, which can maximize the recovery of fine coal remaining after main stream flotation, realizes the process of scraping bubbles, conveying and defoaming without affecting the work of the flotation scavenging machine, and guarantees the continuity and stability of production.
[0021] 2. By adjusting the speed of the scraper and the amount of water spraying, the clean liquid generated by pressure filtration is used for spraying treatment, which reduces the consumption of new water and the discharge of waste water, realizes energy saving and clean production, and reduces the cost of water treatment;
[0022] Further, through the cooperation of the processing mechanism and the separation mechanism, after preliminary pressure filtration dewatering, higher concentration feed is provided for the subsequent concentration and filtration system, the load of the entire subsequent water treatment system is reduced, and the electrical elements are away from the corrosion of the foam, prolonging the service life of the defoaming. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a whole perspective schematic diagram of the device of the application;
[0024] Figure 2 It is a cross-sectional perspective schematic diagram of the flotation scavenging machine of the application;
[0025] Figure 3 It is a first cross-sectional perspective schematic diagram of the processing mechanism of the application;
[0026] Figure 4 It is a first cross-sectional perspective schematic diagram of the processing mechanism of the application;
[0027] Figure 5 It is a second cross-sectional perspective schematic diagram of the processing mechanism of the application;
[0028] Figure 6 It is a cross-sectional perspective schematic diagram of the separation mechanism of the application.
[0029] In the figure: 100, flotation scavenging machine; 200, processing mechanism; 201, annular carrier; 202, baffle; 203, air cylinder; 210, rotating drum; 211, limiting rod; 212, scraper; 213, spraying pipe; 214, rubber strip; 220, motor one; 221, rotating drum; 222, synchronous belt; 300, separation mechanism; 301, storage drum; 302, water pump; 303, pressing rod; 304, small tooth; 305, circular ring; 306, filter screen; 307, rubber ring; 308, water outlet pipe. DETAILED DESCRIPTION
[0030] Clearly, the described embodiments are merely a 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 of ordinary skill in the art without creative efforts are within the protection scope of the present application.
[0031] The embodiment of the present application discloses a defoaming device for coal mine preparation, which comprises a flotation cleaning machine 100 and further comprises:
[0032] The processing mechanism 200 is arranged on the flotation cleaning machine 100, and the processing mechanism 200 comprises an annular carrier 201 fixedly connected to the flotation cleaning machine 100, a baffle 202 fixedly connected to the inner wall of the annular carrier 201, a gas cylinder 203 fixedly connected to the surface of the annular carrier 201, and a fixed block fixedly connected to the output end of the gas cylinder 203.
[0033] The defoaming piece is arranged on the annular carrier 201, and the defoaming piece comprises a rotating drum 210 rotatably connected to the annular carrier 201, a limiting rod 211 slidably connected to the inside of the rotating drum 210, a scraper 212 fixedly connected to the surface of the limiting rod 211 and used for scraping off the floating scum on the surface of the annular carrier 201, and a spray pipe 213 fixedly connected to the surface of the scraper 212 and obliquely provided with a plurality of jet holes.
[0034] The driving piece is arranged on the annular carrier 201.
[0035] The separating mechanism 300 is arranged on the annular carrier 201 and used for pressure filtration of the foam after the defoaming treatment by the spray pipe 213.
[0036] The working principle and beneficial effects of the embodiment are as follows:
[0037] Firstly, refer to 2- Figure 4 The flotation cleaning machine 100 is prior art, which is internally provided with a stirring device for making the medicament injected into the flotation cleaning machine 100 to foam. The above is prior art.
[0038] Secondly, when the foam height in the flotation cleaning machine 100 is too high, the driving piece on the annular carrier 201 starts to work, drives the scraper 212 to make circular motion in the flotation cleaning machine 100, and scrapes the foam while rotating. The foam is scraped and stored on the scraper 212 at the same time, and the scraper 212 moves towards the baffle 202 at an oblique angle. While scraping the foam, the scraper 212 also stores the foam at the oblique angle. With the scraping of the scraper 212, the foam is gradually pushed to the direction away from the shaft center of the flotation cleaning machine 100, refer toFigure 4 When the scraper 212 is about to contact the baffle 202, the scraper 212 is lifted by the jacking effect of the air cylinder 203, the air cylinder 203 drives the limiting rod 211 to lift inside the rotating drum 210, the height of the baffle 202 is higher than the maximum height of the foam, after the scraper 212 is lifted, it continues to rotate through the driving part, until the scraper 212 contacts the baffle 202, the scraper 212 stops rotating, then the spray pipe 213 starts to work, the spray pipe 213 is connected to a water source, after the water flow enters from the inside of the spray pipe 213, it is discharged through a plurality of jet holes, and the foam is defoamed. At the same time, since the scraper 212 has collected the foam to its carrying position, the foam will flow along the inclined angle of the scraper 212 to the inside of the separation mechanism 300 after being defoamed, and be subjected to pressure filtration treatment.
[0039] In use, referring to Figure 3 The limiting rod 211 is cylindrical, and has a protruding limiting surface, so that when the rotating drum 210 rotates, the limiting rod 211 rotates, and the limiting rod 211 can only move up and down inside the rotating drum 210, that is, when the rotating drum 210 rotates, the limiting rod 211 rotates, and the limiting rod 211 can also move up and down linearly in cooperation with the air cylinder 203.
[0040] It should be noted that in the operation of the flotation scavenging machine 100, the scraper 212 slowly and continuously scrapes the foam in the main process, maintains the stability of the separation interface, and reduces the disturbance to the stirring device inside the flotation scavenging machine 100, that is, the scraper 212 does not contact the water surface, the baffle 202 is higher than the maximum height of the foam, and when the foam is scraped to a position outside the main separation area, the spray defoaming is started, and the height is higher than the height of the foam. This working area is relatively isolated from the main separation area, so the violent defoaming action will not affect most of the foam being separated in the flotation scavenging machine 100, thereby minimizing the disturbance of the recovery operation to the flotation process, ensuring high recovery rate while ensuring the quality of the clean coal product. At the same time, since the spray pipe 213 only starts to work after the scraper 212 contacts the baffle 202, the water consumption for defoaming is greatly saved, and the filtrate generated by the separation mechanism 300 is used for defoaming of the foam, forming an internal small circulation, reducing the consumption of fresh water and the discharge amount of waste water. The height of the foam determines whether the driving part is triggered to work, and a liquid level sensor or a visual recognition system can be added to realize more accurate start-stop control of the driving part. When defoaming the inside of the flotation scavenging machine 100, the rotation speed of the scraper 212 can be determined according to the speed of foam generation, for example, the scraper 212 is accelerated when the foam is generated quickly, and the scraper 212 is slowed down when the foam is less to save energy.
[0041] In a further embodiment, a rubber strip 214 is sleeved on one side of the scraper 212, the scraper 212 is not in contact with the baffle 202 in the initial state, and in the working state, the rubber strip 214 on the surface of the scraper 212 abuts against the baffle 202.
[0042] The driving member comprises a motor 220 fixedly connected to the annular carrier 201, and a rotating cylinder 221 fixedly connected to an output end of the motor 220, and a synchronous belt 222 engaged with a surface of the rotating cylinder 221.
[0043] The surface of the rotating cylinder 210 is engaged with the synchronous belt 222, and a cross section of the scraper 212 is in a tilted V shape from a position where the scraper 212 is connected to the rotating cylinder 210.
[0044] The working principle of the embodiment is as follows: first, referring to FIG. 2, Figure 4 When the motor 220 works, the rotating cylinder 221 is driven to rotate, and the synchronous belt 222 on the surface of the rotating cylinder 221 drives the rotating cylinder 210 to rotate on the surface of the annular carrier 201. The rotating cylinder 210 is limited on the annular carrier 201, so that it can only rotate on the annular carrier 201. When the scraper 212 completes the bubble scraping action, the rotating cylinder 221 stops rotating, the cylinder 203 drives the limiting rod 211 to lift, and then the rotating cylinder 221 rotates again, drives the synchronous belt 222 to work, and the limiting rod 211 drives the scraper 212 to move towards the baffle 202.
[0045] During use, the rubber strip 214 can be replaced when it reaches the service life. The rubber strip 214 not only prolongs the service life of the baffle 202 and the scraper 212, but also plays a sealing role. The scraper 212 rotates for the first time to scrape the bubble, and is at the best height for continuous bubble scraping, while minimizing the environmental disturbance to the flotation cleaning machine 100. When the cylinder 203 lifts for the second time, the scraper 212 is separated from the liquid surface and completely separated from the foam layer, so that subsequent actions will not drag or disturb them. The scraper 212 in a tilted V shape effectively guides the water and coal mixture after the foam is removed, ensuring that the coal slurry after the bubble is removed is completely sent to the inside of the separation mechanism 300, and will not leak back to the flotation.
[0046] In a further embodiment, the separation mechanism 300 comprises a storage cylinder 301 fixedly connected to the annular carrier 201, a water pump 302 fixedly connected to a surface of the storage cylinder 301, a pressure rod 303 slidably connected to the inside of the storage cylinder 301, a rack structure provided on a surface of the pressure rod 303, a small gear 304 rotatably connected to a side of the storage cylinder 301 close to the rack structure, a motor two fixedly connected to the surface of the storage cylinder 301 for driving the small gear 304, a circular ring 305 fixedly connected to the pressure rod 303 close to a gravity center of the earth, a detachable filter screen 306 sleeved in the circular ring 305, and a rubber ring 307 sleeved outside the circular ring 305 for sealing.
[0047] The output end of the second motor is fixedly connected with the axis of the pinion 304, and the surface of the pinion 304 is engaged with the rack structure on the surface of the pressure rod 303.
[0048] The water pump 302 is provided with an inlet and an outlet, the inlet is connected with the pipeline I, and the outlet is connected with the water outlet pipe 308.
[0049] The other end of the pipeline I penetrates through the storage cylinder 301 and extends to a higher position in the internal chamber of the storage cylinder 301, the other end of the water outlet pipe 308 is fixedly connected with the spray pipe 213, and the interiors of the two are connected.
[0050] When the scraper 212 runs to the maximum stroke, an inclined sector chamber is formed with the baffle 202, and the height of the sector chamber close to one side of the annular carrier 201 is higher than the height of the sector chamber far away from the axis of the annular carrier 201.
[0051] The working principle of the embodiment is as follows: first refer to 4- Figure 6 The water pump 302 is fixed on the surface of the storage cylinder 301, when the baffle 202 and the scraper 212 are combined and the foam elimination is guided to the inside of the storage cylinder 301 by the spray pipe 213, the second motor starts to work, the second motor drives the pinion 304 to rotate in the inside of the storage cylinder 301, the lifting of the pressure rod 303 is controlled, the mixed liquid sent into the inside of the storage cylinder 301 is subjected to pressure filtration treatment, when the pressure rod 303 descends, the circular ring 305 starts to descend, the rubber ring 307 moves linearly in the inside of the storage cylinder 301, the cinder is filtered by the filter screen 306 at this time, the filter screen 306 separates the cinder and the water towards the direction of the gravity center of the ground, the upper half chamber of the storage cylinder 301 descends at this time, the water body gradually becomes clean, after the filter screen 306 reaches the maximum stroke, the water in the upper half of the storage cylinder 301 is pumped out through the pipeline I of the inlet after a period of standing, then the water is pumped into the inside of the water outlet pipe 308 by the water pump 302, then the water outlet pipe 308 sprays the water into the inside of the spray pipe 213, when the pollution or the concentration of the additive in the inside of the flotation and sweeping separator 100 is too high, the pipeline I of the outlet is connected with a clean water source, and the water is not pumped out from the inside of the storage cylinder 301.
[0052] It should be noted that the storage cylinder 301 near the center of gravity direction needs to be installed for the valve or switch for taking out the coal slime after pressure filtration, the rubber ring 307 and the filter screen 306 can be replaced in time when damaged, the pressure rod 303 is pressed for mechanical pressure filtration, most of the free water in the coal slime is quickly removed, after pressure filtration, "stand for a period of time", avoid the fine particles that the filter screen 306 fails to filter affecting the cleanliness of the water body, reduce the risk of backwater blockage, maximize the reduction of fresh water consumption and external wastewater discharge, the trace amount of residual reagent that may be contained in the recycled water is compatible with the system itself in composition and temperature, recycling helps to maintain the chemical stability of the flotation environment, avoid the introduction of external water, such as temperature, hardness difference caused by fluctuations, at the same time, it can also select the standby path, that is, access to clean water source from the outside, when pressure filtration, the valve or switch needs to be closed, after the treatment is completed, open the valve to discharge the coal slime, then close the valve for the next round of treatment.
[0053] The content not described in detail in the description belongs to the prior art known to those skilled in the art, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A defoaming device for coal mine preparation, comprising a flotation scavenger (100), characterized in that, Also include: Processing mechanism (200) is arranged on the flotation cleaning machine (100), the processing mechanism (200) includes annular carrier (201) fixedly connected on the flotation cleaning machine (100), the inner wall of the annular carrier (201) is fixedly connected with the baffle (202), the surface of the annular carrier (201) is fixedly connected with the air cylinder (203), the output end of the air cylinder (203) is fixedly connected with the fixed block; Defoaming part, arranged on the annular carrier (201), the defoaming part includes a rotating drum (210) rotatably connected to the annular carrier (201), the rotating drum (210) is slidably connected with a limiting rod (211) inside, the surface of the limiting rod (211) is fixedly connected with a scraper (212) for scraping the floating matter on the surface of the annular carrier (201), the surface of the scraper (212) is fixedly connected with a spray pipe (213), a plurality of jet holes are obliquely arranged on the surface of the spray pipe (213), and the floating matter scraped by the scraper (212) is defoamed in the working state, and the end of the limiting rod (211) is fixedly connected with the fixed block; Driving part, arranged on the annular carrier (201); Separation mechanism (300), arranged on the annular carrier (201), for filtering the foam after defoaming treatment by the spray pipe (213).
2. The defoaming device for coal mine preparation of claim 1, characterized in that: The side of the scraper (212) is sleeved with a rubber strip (214), and the scraper (212) is not in contact with the baffle (202) in the initial state, and is in contact with the baffle (202) in the working state through the rubber strip (214) on the surface thereof.
3. The defoaming device for coal mine preparation of claim 2, characterized in that: The driving part includes a motor one (220) fixedly connected to the annular carrier (201), and the output end of the motor one (220) is fixedly connected with a rotating cylinder (221), and the surface of the rotating cylinder (221) is engaged with a synchronous belt (222).
4. The defoaming device for coal mine preparation of claim 3, characterized in that: The surface of the rotating drum (210) is engaged with the synchronous belt (222), and the cross section of the scraper (212) is inclined V-shaped from the connection between the scraper (212) and the rotating drum (210).
5. The defoaming device for coal mine preparation of claim 4, characterized in that: The separation mechanism (300) includes a storage cylinder (301) fixedly connected to the annular carrier (201), a water pump (302) fixedly connected to the surface of the storage cylinder (301), a pressure rod (303) slidably connected in the storage cylinder (301), a rack structure arranged on the surface of the pressure rod (303), a pinion (304) rotatably connected to the inner side of the rack structure in the storage cylinder (301), a motor two fixedly connected to the surface of the storage cylinder (301) and used for driving the pinion (304), a circular ring (305) fixedly connected to the end of the pressure rod (303) close to the gravity center of the earth, a detachable filter screen (306) sleeved in the inner ring of the circular ring (305), and a rubber ring (307) sleeved on the outer ring of the circular ring (305) and used for sealing.
6. The defoaming device for coal mine preparation of claim 5, wherein: The output end of the motor two is fixedly connected with the shaft center of the pinion (304), and the surface of the pinion (304) is engaged with the rack structure on the surface of the pressure rod (303).
7. The defoaming device for coal mine preparation of claim 6, wherein: The water pump (302) is provided with an inlet and an outlet, the inlet is connected with a pipeline I, and the outlet is connected with a water outlet pipe (308).
8. The defoaming device for coal mine preparation of claim 7, wherein: The other end of the pipeline I penetrates through the storage cylinder (301) and extends to a higher position of the internal chamber thereof, the other end of the water outlet pipe (308) is fixedly connected with the spray pipe (213), and the interiors of the two are connected in communication.
9. The defoaming device for coal mine preparation of claim 8, characterized in that: When the scraper (212) runs to the maximum stroke, an inclined sector chamber is formed between the scraper (212) and the baffle (202), and the height of the sector chamber close to one side of the annular carrier (201) is higher than that far away from the axis of the annular carrier (201).