Grading overflow device for center transmission thickener

Abstract

The utility model discloses a grading overflow device for a central transmission thickener, which comprises a tank body shell, the upper part of the tank body shell is a cylinder, the lower part of the tank body shell is a cone, the bottom of the tank body shell is provided with a feed opening, and the left side of the tank body shell is horizontally provided with a feed pipe in a penetrating manner; the right end of the feeding pipe is connected and provided with a central feeding cylinder, a cross beam is horizontally arranged above the tank body shell, a driving structure is arranged above the cross beam, the bottom of the central feeding cylinder is provided with a rake frame, the rake frame is located in a lower cone space in the tank body shell, and scraping discs are arranged on the left side and the right side above the tank body shell; a baffle is arranged on the outer side of the scraping disc, an outer overflow weir is arranged on the outer side of the tank body shell, and a plurality of filter screens are arranged in the outer overflow weir. According to the graded overflow device for the central transmission thickener, water flows in high and low flow directions are formed through the surrounding type outer overflow weir and are filtered through the graded filter screen, so that water pollution in solid-liquid separation is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of central transmission thickeners, in particular to a grading overflow device for central transmission thickeners. Background Art

[0002] Thickeners are widely used in mineral processing plants. They are mainly used in processes that require solid-liquid separation, such as leachate concentration and wastewater treatment. With the help of a slowly running rake installed in the thickener, the slurry enters the thickener through the central vertical cylinder. The guide plate at the outlet end of the feed vertical cylinder guides the slurry from the feed vertical cylinder to the surroundings, so that the slurry spreads to the surroundings and enters the pre-formed mud layer. Together with the flocculant that comes in with the material, the mud layer is formed and precipitated to the bottom of the thickener. The liquid rises through the mud layer, and the mud layer acts as a filter, preventing fine particles from rising. The slurry moves in the mud layer, causing the particles to contact the flocculant and continue to flocculate. Based on the gravity sedimentation effect, the slurry containing solid weight is concentrated into a thickened underflow slurry through gravity sedimentation, so that the thickened underflow slurry is discharged from the underflow port at the bottom of the thickener. Most of the clean water separated from the slurry overflows naturally from the overflow weir of the thickener. However, there are still certain problems when using the existing central transmission thickener:

[0003] For example, a central transmission high-efficiency thickener with publication number CN204337846U has the following technical solution: it includes a chassis, a liquid inlet pipe is provided on the chassis, a flow stabilizer is located in the chassis, a water outlet weir plate is provided on the flow stabilizer, the surface of the water outlet weir plate is curved toothed, the water outlet weir plate is connected to the inner side wall of the chassis through a rubber plate, a liquid outlet is provided on the side wall of the flow stabilizer, the liquid outlet is located below the water outlet weir plate, a central shaft is installed with a bearing at the bottom of the chassis, a transmission mechanism is connected to the central shaft, a mud trough scraper is provided on the bottom of the central shaft, the bottom of the chassis is conical, a mud scraper frame is connected to the central shaft, a plurality of parallel bars are connected to the mud scraper frame, a liquid outlet is provided on the side wall of the chassis, the liquid outlet is located below the liquid inlet, the liquid outlet is located above the rubber plate, and a mud discharge port is provided at the bottom of the chassis. However, the overflow mechanism of the existing central transmission high-efficiency thickener is prone to foaming and turbidity, and the clarity of the water at the top cannot be guaranteed.

[0004] In view of this, we conducted in-depth research on the above issues, which led to the present case.

[0005] In view of the above problems, an innovative design was carried out based on the original center-drive thickener. Utility Model Content

[0006] The utility model aims to provide a grading overflow device for a central transmission thickener, so as to solve the problems in the above background technology that the overflow mechanism is prone to foaming and the water is not clear enough.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A grading overflow device for a central transmission thickener comprises a tank shell, the upper part of the tank shell is cylindrical, and the lower part of the tank shell is conical, a feed port is arranged at the bottom of the tank shell, a feeding pipe is horizontally penetrated through the left side of the tank shell, and a central feeding barrel is connected and installed at the right end of the feeding pipe, a cross beam is horizontally arranged above the tank shell, and a driving structure is arranged above the cross beam, a rake frame is arranged at the bottom of the central feeding barrel, and the rake frame is located in the conical space below the tank shell, scrapers are arranged on the left and right sides above the tank shell, and a baffle is arranged on the outer side of the scraper, an external overflow weir is arranged on the outer side of the tank shell, and a plurality of filter screens are arranged inside the external overflow weir.

[0009] Preferably, a driving motor is fixedly installed above the cross beam, and a first rotating shaft is connected to the output shaft below the driving motor, and the bottom end of the first rotating shaft is fixedly connected to the rake rod to form a rotating structure.

[0010] By adopting the above technical solution, the drive motor is started and its output shaft drives the first rotating shaft to rotate, thereby driving the rake rod below to rotate, so as to provide mechanical power for the rotation of the rake frame.

[0011] Preferably, a rake frame is fixedly installed at the bottom of the rake rod, and a plurality of scraper plates are fixedly installed on the rake frame close to the inside of the trough shell, and the rake frame drives the scraper plates to form a rotating structure.

[0012] By adopting the above technical solution, when the rake rod rotates, the rake frame is also driven to rotate, thereby driving the scraper plate to rotate in the cone part inside the trough shell to scrape off the residue, effectively separating the solid and liquid, and transferring the dry mud to the discharge port below.

[0013] Preferably, a transmission belt is horizontally connected and installed on both sides of the first rotating shaft, and a second rotating shaft is connected and installed on the outer side of the transmission belt, the upper end of the second rotating shaft is connected to the bottom surface of the beam by a bearing, and a scraper is fixedly installed on the bottom end of the second rotating shaft to form a rotating structure.

[0014] By adopting the above technical solution, when the first rotating shaft rotates, it drives the two left and right second rotating shafts to rotate simultaneously through the left and right transmission belts, and then the scraper connected to the bottom end rotates to scrape off the foam produced on the surface and prevent the foam from polluting and overflowing water.

[0015] Preferably, a plurality of overflow holes are provided on the inner edges of the outer shell of the tank body, and baffles are provided inside the overflow holes, and the baffles have the function of blocking the flow of foam.

[0016] By adopting the above technical solution, the baffle can block the foam scraped off by the scraper to prevent the foam from flowing into the overflow hole, and the top water can flow out through the overflow hole to facilitate the recovery of solid-liquid water.

[0017] Preferably, an outer overflow weir is arranged on the outer side edge of the upper part of the tank shell, and the outer overflow weir is coiled on the outer side of the tank shell, and an overflow groove is opened between the outer overflow weir and the tank shell.

[0018] By adopting the above technical solution, the surrounding overflow weir makes it easier for water to flow from high to low, effectively filtering during classification to ensure that the water will not be contaminated.

[0019] Preferably, a plurality of filter screens are arranged at intervals inside the overflow trough, and the left and right sides of the filter screens are connected between the inner side of the outer overflow weir and the outer side of the trough body shell, and the filter screens filter the water flow.

[0020] By adopting the above technical scheme, the overflow water flows from high to low through the overflow trough, and is blocked by the filter net for graded filtration, which effectively prevents water pollution and facilitates the recovery and reuse of solid and liquid components of water.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the grading overflow device for the central transmission thickener is

[0022] 1. A scraper disc for scraping off foam is provided, a transmission belt is horizontally connected and installed on both sides of the first rotating shaft, and a second rotating shaft is connected and installed on the outer side of the transmission belt, the upper end of the second rotating shaft is connected to the bottom surface of the beam by a bearing, and a scraper disc is fixedly installed on the bottom end of the second rotating shaft to form a rotating structure, when the first rotating shaft rotates, it drives the left and right second rotating shafts to rotate at the same time through the left and right transmission belts, and then the scraper disc connected to the bottom end rotates to facilitate scraping off the foam produced on the surface, so as to prevent the foam from polluting and overflowing water;

[0023] 2. A coiled external overflow weir is provided, and an external overflow weir is provided on the outer edge above the tank shell, and the external overflow weir is coiled on the outside of the tank shell, and an overflow trough is opened between the external overflow weir and the tank shell, and a plurality of filter screens are arranged at intervals inside the overflow trough, and the left and right sides of the filter screens are connected between the inner side of the external overflow weir and the outer side of the tank shell, and the filter screens filter the water flow, and the outer overflow weir is surrounded to facilitate the water flow direction to flow from high to low, and the overflow water flow tends to flow from high to low through the overflow trough, and is blocked by the filter screen for graded filtration, which effectively prevents water pollution and facilitates the recovery and reuse of solid and liquid components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the front structure of the scraper of the utility model;

[0026] Figure 3 This is a schematic diagram of the top view of the external overflow weir structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the front structure of the external overflow weir of the utility model;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the external overflow weir of the utility model.

[0029] In the figure: 1. tank shell; 2. discharge port; 3. feeding pipe; 4. central feeding cylinder; 5. crossbeam; 6. driving motor; 7. first rotating shaft; 8. rake rod; 9. rake frame; 901. scraper; 10. transmission belt; 11. second rotating shaft; 12. scraper; 13. baffle; 14. external overflow weir; 15. overflow trough; 16. overflow hole; 17. filter screen. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-5 , the utility model provides a technical solution:

[0032] A grading overflow device for a central transmission thickener comprises a tank shell 1, which is cylindrical on the top and conical on the bottom, a discharge port 2 is arranged at the bottom of the tank shell 1, a feeding pipe 3 is horizontally penetrated through the left side of the tank shell 1, and a central feeding barrel 4 is connected and installed at the right end of the feeding pipe 3, a crossbeam 5 is horizontally arranged above the tank shell 1, and a driving structure is arranged above the crossbeam 5, a rake frame 9 is arranged at the bottom of the central feeding barrel 4, and the rake frame 9 is located in the conical space below the tank shell 1, scrapers 12 are arranged on the left and right sides above the tank shell 1, and baffles 13 are arranged on the outside of the scraper 12, an external overflow weir 14 is arranged on the outside of the tank shell 1, and a plurality of filter screens 17 are arranged inside the external overflow weir 14.

[0033] A driving motor 6 is fixedly installed above the crossbeam 5, and a first rotating shaft 7 is connected and installed on the output shaft below the driving motor 6, and a rake rod 8 is fixedly connected to the bottom end of the first rotating shaft 7 to form a rotating structure. A rake frame 9 is fixedly installed at the bottom of the rake rod 8, and a plurality of scraper plates 901 are fixedly installed on the rake frame 9 near the inside of the tank shell 1, and the rake frame 9 drives the scraper plates 901 to form a rotating structure. When the driving motor 6 is started, its output shaft drives the first rotating shaft 7 to rotate, and then drives the rake rod 8 below to rotate, so as to provide mechanical power for the rotation of the rake frame 9. When the rake rod 8 rotates, it also drives the rake frame 9 to rotate, and then drives the scraper plates 901 to rotate in the cone part inside the tank shell 1 to scrape off the residue, effectively separate the solid and liquid, and transfer the dry mud to the discharge port 2 below.

[0034] The first rotating shaft 7 is horizontally connected with a transmission belt 10 on both sides, and the second rotating shaft 11 is connected to the outside of the transmission belt 10. The upper end of the second rotating shaft 11 is connected to the bottom surface of the beam 5 by a bearing, and the bottom end of the second rotating shaft 11 is fixedly installed with a scraper 12 to form a rotating structure. The inner edge of the upper part of the tank shell 1 is provided with a plurality of overflow holes 16, and the inner side of the overflow hole 16 is provided with a baffle 13, and the baffle 13 has the function of blocking the flow of foam. When the first rotating shaft 7 rotates, it drives the left and right second rotating shafts 11 to rotate at the same time through the left and right transmission belts 10, and then the scraper 12 connected to the bottom end rotates to facilitate scraping the foam produced on the surface and prevent the foam from polluting the overflowing water. The baffle 13 can block the foam scraped by the scraper 12 to prevent the foam from flowing into the overflow hole 16, and the top water can flow out through the overflow hole 16 to facilitate the recovery of solid and liquid water.

[0035] An external overflow weir 14 is arranged on the outer edge above the tank shell 1, and the external overflow weir 14 is coiled outside the tank shell 1, and an overflow trough 15 is provided between the external overflow weir 14 and the tank shell 1. A plurality of filter screens 17 are arranged at intervals inside the overflow trough 15, and both sides of the filter screen 17 are connected between the inner side of the external overflow weir 14 and the outer side of the tank shell 1, and the filter screen 17 plays a filtering role on the water flow. The outer overflow weir 14 is surrounded so that the water can flow from high to low, and the filtering treatment during classification is effectively performed to ensure that the water will not be polluted. The overflow water flows from high to low through the overflow trough 15, and is blocked by the filter screen 17 for graded filtration, which effectively prevents water pollution and facilitates the recycling and reuse of solid and liquid components.

[0036] Working principle:

[0037] When the utility model is in use, the feeding pipe 3 transports the ore mud to the central feeding barrel 4, the driving motor 6 is started and its output shaft drives the first rotating shaft 7 to rotate, thereby driving the rake rod 8 below to rotate, and at the same time driving the rake frame 9 to rotate, thereby driving the scraper plate 901 to rotate in the cone part inside the tank shell 1 to scrape off the residue, effectively separate the solid and liquid, and transmit the dry mud to the discharge port 2 below. When the first rotating shaft 7 rotates, it drives the left and right second rotating shafts 11 to rotate through the left and right transmission belts 10 at the same time, and then the scraper plate 12 connected to the bottom rotates to facilitate scraping off the foam produced on the surface. The baffle plate 13 can block the foam scraped by the scraper plate 12 to prevent the foam from flowing into the overflow hole 16. The water flowing out of the overflow hole 16 flows from the overflow weir 14 through the overflow trough 15 with a flow trend from high to low, and is blocked to a certain extent by the filter screen 17 for graded filtration.

[0038] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A classification overflow device for a central transmission thickener, comprising a tank housing (1), characterized in that: The upper part of the tank shell (1) is cylindrical, and the lower part of the tank shell (1) is conical, and a feed port (2) is arranged at the bottom of the tank shell (1), a feed pipe (3) is arranged horizontally through the left side of the tank shell (1), and a central feed barrel (4) is connected and installed at the right end of the feed pipe (3), a cross beam (5) is arranged horizontally above the tank shell (1), and a driving structure is arranged above the cross beam (5), a rake frame (9) is arranged at the bottom of the central feed barrel (4), and the rake frame (9) is located in the conical space below the tank shell (1), scrapers (12) are arranged on the left and right sides of the upper part of the tank shell (1), and a baffle (13) is arranged on the outer side of the scraper (12), an external overflow weir (14) is arranged on the outer side of the tank shell (1), and a plurality of filter screens (17) are arranged inside the external overflow weir (14).

2. A classification overflow device for a central transmission thickener according to claim 1, characterized in that: A driving motor (6) is fixedly installed above the crossbeam (5), and a first rotating shaft (7) is connected and installed on the output shaft below the driving motor (6), and the bottom end of the first rotating shaft (7) is fixedly connected to a rake rod (8) to form a rotating structure.

3. A classification overflow device for a central transmission thickener according to claim 2, characterized in that: A rake frame (9) is fixedly installed at the bottom of the rake rod (8), and a plurality of scraper plates (901) are fixedly installed on the rake frame (9) close to the inside of the tank shell (1), and the rake frame (9) drives the scraper plates (901) to form a rotating structure.

4. A classification overflow device for a central transmission thickener according to claim 2, characterized in that: The left and right sides of the first rotating shaft (7) are horizontally connected with a transmission belt (10), and the outer side of the transmission belt (10) is connected with a second rotating shaft (11), the upper end of the second rotating shaft (11) is connected to the bottom surface of the beam (5) by a bearing, and the bottom end of the second rotating shaft (11) is fixedly installed with a scraper (12) to form a rotating structure.

5. The classifying overflow device for a central transmission thickener according to claim 1, characterized in that: The inner edge of the upper portion of the tank shell (1) is provided with a plurality of overflow holes (16), and baffles (13) are provided inside the overflow holes (16), and the baffles (13) have the function of blocking the flow of foam.

6. A classification overflow device for a central transmission thickener according to claim 5, characterized in that: An external overflow weir (14) is arranged on the outer edge of the upper part of the tank shell (1), and the external overflow weir (14) is coiled outside the tank shell (1), and an overflow groove (15) is provided between the external overflow weir (14) and the tank shell (1).

7. A classifying overflow device for a central transmission thickener according to claim 6, characterized in that: A plurality of filter screens (17) are arranged at intervals inside the overflow trough (15), and the left and right sides of the filter screens (17) are connected between the inner side of the outer overflow weir (14) and the outer side of the trough body shell (1), and the filter screens (17) play a filtering role on the water flow.

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