Medium drainage device
By designing a bracket, a feed buffer distributor and a double-layer screen body for the de-mediation device, the problem of uneven material distribution in the heavy medium shallow trough and the heavy medium cyclone in the pre-de-mediation link is solved, efficient screening and reduced medium consumption are achieved, the screening requirements of different suspension slurries are met, and the production management level of the coal preparation plant is improved.
Patent Information
- Application Number
- CN202422815726.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-18
AI Technical Summary
The existing heavy medium shallow trough and heavy medium cyclone have problems such as uneven material distribution, material accumulation on the screen, and material channeling in the pre-demediation link, resulting in high medium consumption. In addition, the traditional fixed screen has low processing capacity per unit area and occupies a large area. When the screen gap is enlarged, the repeated circulation of coarse coal particles increases the system circulation load.
A de-intermediation device was designed, which included a bracket, a feed buffer distributor, a feed body, a de-intermediation box, and first and second screen bodies. After the mixed suspension slurry was evenly distributed through the feed buffer distributor, large coal pieces were initially separated and entered the first screen body for screening. Fine-grained materials entered the second screen body for further screening. A water replenishment unit and a rotating screen barrel were set to improve screening efficiency and accuracy.
It realizes the effective separation and pretreatment of mixed suspension, improves the screening accuracy and efficiency, reduces the medium consumption, and has a compact structure and small footprint, which can adapt to the screening needs of different suspension slurries.
Smart Images
Figure CN223475211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mineral sorting equipment technology, and in particular to a desliming device. Background Art
[0002] Currently, heavy medium processes are widely used in domestic coal preparation plants. Among them, heavy medium shallow troughs and heavy medium cyclones are widely used in the coal preparation industry due to their high processing capacity and wide adaptability. However, medium consumption, as a significant production cost of coal preparation plants, not only directly affects the economic benefits of enterprises but is also an important indicator for measuring their production management level and equipment performance. According to statistics, although coal preparation plants of similar size have similar expenditures in equipment maintenance, electricity consumption, and water consumption, there are significant differences in the medium consumption per ton of coal. This is mainly related to the effectiveness of medium removal in the pre-demediation stage.
[0003] Traditional pre-desmudging equipment, such as arc screens, typically uses a central or two-point feeding method, which suffers from uneven material distribution, material accumulation on the screen, and material leakage, resulting in poor pre-desmudging performance in the merging section. To improve pre-desmudging efficiency, fixed screens have gradually replaced traditional arc screens in recent years. However, fixed screens also have some problems, such as low processing capacity per unit area. To improve desmudging efficiency, methods such as increasing the desmudging contact area and widening the screen openings are commonly used. However, this introduces new problems: increasing the desmudging contact area leads to a larger equipment footprint, resulting in space constraints; simultaneously, widening the screen openings causes coarse coal particles to repeatedly circulate within the system, increasing the system's circulating load. Summary of the Invention
[0004] To address the above problems, this application provides a desliming device, which includes a support frame, a feed buffer distributor mounted on the support frame, a feed body positioned above the feed buffer distributor, a desliming box mounted on one side of the feed buffer distributor, a pre-screen chute mounted on the other side of the desliming box, a converging chute positioned at the bottom of the desliming box, a first screen and a second screen inside the desliming box, the discharge port of the feed buffer distributor connected to the feed end of the first screen, and the discharge ends of the first and second screens connected to the pre-screen chute.
[0005] In one embodiment, the feed end of the first screen body and the second screen body is higher than the discharge end, and the inclination angle is 5° to 50°.
[0006] In one embodiment, the first screen body and the second screen body are flat screen plates. The screen plates can adopt one or more screen slot forms such as perforated screen plates, grid screens, bar screens or slotted screens. The screen plates are fixed in the screen frame by snap fasteners.
[0007] In one embodiment, the first screen body and the second screen body are cylindrical screen barrels, and the first screen body and the second screen body are rotatably installed in the desizing box.
[0008] In one embodiment, the diameter of the feed pipe of the feed body is in the range of DN100 to DN500.
[0009] In one embodiment, the desliming chamber is provided with a water replenishment unit, which adopts a linear water replenishment structure, the water replenishment pressure is controlled at 0.1 to 0.3 MPa, and the nozzle adopts a duckbill structure.
[0010] In one embodiment, the feed buffer feeder's feed box adopts a buffer overflow structure.
[0011] The beneficial effects of this utility model are as follows:
[0012] This application discloses a desliming device, which includes a support frame, a feed buffer distributor mounted on the support frame, a feed body positioned above the feed buffer distributor, a desliming box positioned on one side of the feed buffer distributor, a pre-screen chute and a media converging chute mounted on the desliming box, a first screen and a second screen inside the desliming box, the discharge port of the feed buffer distributor being connected to the feed end of the first screen, and the discharge ends of the first and second screens being connected to the pre-screen chute. The mixed suspension slurry is introduced into the feed buffer distributor through the feed body. When the mixed suspension slurry flows through the first screen, the lump coal larger than the screen opening is intercepted and diverted to the subsequent processing stage through the pre-screen chute. The fine coal, coal slurry, water, and media smaller than the screen opening pass through the screen and fall onto the second screen. The first screen achieves the initial separation of large coal pieces, reduces the burden on the second screen, and improves the overall screening efficiency. On the second screen, the mixed suspension slurry continues to flow. Most of the coal slurry water and media pass through the screen opening into the combined medium chute for subsequent recovery and processing. The coarse coal and coal slurry water remain on the second screen and do not pass through the screen opening. The second screen achieves further screening of the mixed suspension slurry, improving the screening accuracy and efficiency. The device integrates the entire process from the introduction of the mixed suspension slurry, the buffer cloth, the screening of the double-layer screen, and the treatment. It achieves effective separation and pretreatment of the mixed suspension. The device has a compact structure and a small footprint. The double-layer screen enables the classification and screening of the mixed suspension slurry, improving the accuracy and efficiency of screening. Attached Figure Description
[0013] Figure 1 This is a sectional view of the utility model.
[0014] Figure 2 This is the left view of the present invention;
[0015] Explanation of symbols in the diagram:
[0016] 1. Bracket;
[0017] 2. Feed buffer distributor;
[0018] 3. Feed body;
[0019] 4. Demediation box; 41. Pre-screen chute; 42. Combined media chute;
[0020] 5. First sieve body;
[0021] 6. Second sieve body;
[0022] 7. Water replenishment unit. DETAILED DESCRIPTION
[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0024] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0025] like Figure 1 , 2 As shown, a desliming device is provided, including a support 1, a feed buffer distributor 2 on the support 1, a feed body 3 above the feed buffer distributor 2, a desliming box 4 on one side of the feed buffer distributor 2, a pre-screen chute 41 on the other side of the desliming box 4, a converging chute 42 at the bottom of the desliming box 4, a first screen body 5 and a second screen body 6 inside the desliming box 4, the discharge port of the feed buffer distributor 2 is connected to the feed end of the first screen body 5, and the discharge ends of the first screen body 5 and the second screen body 6 are connected to the pre-screen chute 41.
[0026] Specifically, the mixed suspension slurry (containing coal, coal slime, water and heavy media) is introduced into the feed buffer distributor 2 through the feed body 3. The feed buffer distributor 2 buffers the mixed suspension slurry, slows down its falling speed, and makes the mixed suspension slurry evenly distributed on the first screen body 5. The setting of the buffer distributor 2 avoids the mixed suspension slurry directly impacting the screen body, extends the service life of the screen body, and at the same time, the uniform distribution improves the screening efficiency. When the mixed suspension slurry flows through the first screen body 5, lumps of coal larger than the screen openings are intercepted and diverted to subsequent processing stages via the pre-screen chute 41. Fine coal, coal slurry, water, and media smaller than the screen openings pass through the screen and fall onto the second screen body 6. The first screen body 5 achieves preliminary separation of large lumps of coal, reducing the burden on the second screen body 6 and improving overall screening efficiency. On the second screen body 6, the mixed suspension slurry continues to flow. Most of the coal slurry and media pass through the screen openings into the combined medium chute 42 for subsequent recovery and processing. Coarse coal particles and coal slurry remain on the second screen body 6, not passing through the screen openings. The second screen body 6 achieves further screening of the mixed suspension slurry, improving screening accuracy and efficiency. The lumps of coal intercepted by the first screen body 5 and the unscreened coarse coal particles and coal slurry on the second screen body 6 are mixed and diverted to the subsequent desliming device via the pre-screen chute 41 for further desliming treatment. The device integrates the entire process from the introduction of the mixed suspension slurry, the buffer cloth, the screening of the double-layer screen, and the treatment. It achieves effective separation and pretreatment of the mixed suspension. The device has a compact structure and a small footprint. The double-layer screen enables the classification and screening of the mixed suspension slurry, improving the accuracy and efficiency of screening.
[0027] like Figure 1 As shown, the feed end of the first screen body 5 and the second screen body 6 is higher than the discharge end, with an inclination angle of 5° to 50°.
[0028] Specifically, the inclination angles of the first screen body 5 and the second screen body 6 facilitate the flow of the mixed suspension slurry on the screen surface. When the mixed suspension slurry is subjected to gravity, it flows downward along the inclination angle of the screen surface, thus passing through the screen openings for screening. Different mixed suspension slurries have different physical properties and screening requirements. By adjusting the inclination angle of the screen bodies, the screening needs of different mixed suspension slurries can be adapted, the residence time of the mixed suspension slurry on the screen surface can be controlled, and better screening results can be achieved.
[0029] like Figure 1 As shown, the first screen body 5 and the second screen body 6 are flat screen plates. The screen plates can adopt one or more of the following screen slot forms: perforated screen plate, grid screen, bar screen or slotted screen. The screen plates are fixed in the screen frame by a snap fastener.
[0030] Specifically, the screen plate adopts one or more specifications of 610mm×610mm, 610mm×305mm, and 305mm×305mm. Both the first screen body 5 and the second screen body 6 are designed as flat screen plates. The screen plate can adopt various screen slot forms, including but not limited to perforated screen plates, grid screens, bar screens, and slotted screens. The selection of these screen slot forms depends on the characteristics of the mixed suspension slurry and the screening requirements. The screen plate is fixed inside the screen frame by a snap-fit mechanism, which not only ensures the stability and reliability of the screen plate but also facilitates its replacement and maintenance. When the screen plate is worn or needs replacement, the operator can easily remove the screen plate from the screen frame using the snap-fit mechanism and install a new screen plate, thereby ensuring the continuous operation of the equipment and the screening effect.
[0031] like Figure 1 As shown, the first screen body 5 and the second screen body 6 are cylindrical screen barrels, and the first screen body 5 and the second screen body 6 are rotatably installed in the desizing box 4.
[0032] Specifically, in the desizing chamber 4, the first screen body 5 and the second screen body 6 are rotatably mounted, allowing the screen barrel to rotate during the screening process, thereby further promoting the uniform distribution and screening of the mixed suspension slurry. Through rotation, the mixed suspension slurry continuously tumbles and collides within the screen barrel, which helps to separate fine particles and media from the mixed suspension slurry.
[0033] like Figure 1 As shown, the diameter of the feed pipe of the feed body 3 ranges from DN100 to DN500.
[0034] Specifically, the pipe diameter range of DN100 to DN500 can accommodate mixed suspension slurries with different flow rates and particle sizes, which helps to optimize the flow and distribution of the mixed suspension slurry, reduce the risk of clogging and material accumulation, and thus improve screening efficiency and equipment stability.
[0035] like Figure 1 As shown, the desliming chamber 4 is equipped with a water replenishment unit 7. The water replenishment unit adopts a linear water replenishment structure, the water replenishment pressure is controlled at 0.1 to 0.3 MPa, and the nozzle adopts a duckbill structure.
[0036] Specifically, a water replenishment unit is cleverly designed on the desliming chamber 4 to achieve uniform water replenishment to the screen surface, maintaining a good screening environment and desliming effect. The water replenishment unit adopts a linear water replenishment structure, which can evenly distribute the water flow along the length of the screen surface, ensuring that each screening area receives an appropriate amount of water. The duckbill-shaped nozzle design makes the sprayed water flow more concentrated and powerful, which can more effectively wash away the media and fine particles on the screen surface, thereby improving the desliming effect and reducing media residue.
[0037] like Figure 1 ,2 As shown, the feeding buffer feeder 2 has a feeding box body with a buffer overflow structure.
[0038] Specifically, after the mixed slurry enters the distribution box, the medium with high specific gravity and large particle size and the coal particles are pre-settled in the buffer tank to form a buffer layer, which realizes the buffering effect of the mixed suspension slurry, reduces the impact of the mixed suspension slurry on the distribution box, weakens the initial velocity of the mixed suspension slurry entering the screen, appropriately prolongs the residence time of the mixed suspension slurry, and improves the desliming effect. As the mixed suspension slurry accumulates, when a certain pressure or height is reached, the excess mixed suspension slurry will flow out through the overflow port, thereby realizing the continuous and uniform distribution of the mixed suspension slurry.
[0039] This application discloses a desliming device, which includes a support 1, a feed buffer distributor 2 on the support 1, a feed body 3 above the feed buffer distributor 2, a desliming box 4 on one side of the feed buffer distributor 2, a pre-screen chute 41 and a converging chute 42 on the desliming box 4, a first screen body 5 and a second screen body 6 inside the desliming box 4, the discharge port of the feed buffer distributor 2 is connected to the feed end of the first screen body 5, and the discharge ends of the first screen body 5 and the second screen body 6 are connected to the pre-screen chute 41. The mixed suspension slurry is introduced into the feed buffer distributor 2 through the feed body 3. When the mixed suspension slurry flows through the first screen body 5, the lump coal larger than the screen opening is intercepted and guided to the subsequent processing stage through the pre-screen chute 41. The fine coal, coal slurry, water and medium smaller than the screen opening pass through the screen and fall onto the second screen body 6. The setting of the first screen body 5 realizes the initial separation of large coal pieces, reduces the burden on the second screen body 6, and improves the overall screening efficiency. On the second screen body 6, the mixed suspension slurry continues to flow. Most of the coal slurry water and medium pass through the screen opening into the combined medium chute 42 for subsequent recovery and treatment. The coarse coal and coal slurry water remain on the second screen body 6 and do not pass through the screen opening. The setting of the second screen body 6 realizes further screening of the mixed suspension slurry and improves the screening accuracy and efficiency. The device integrates the entire process from the introduction of the mixed suspension slurry, the buffer cloth, the screening of the double-layer screen, and the treatment. It achieves effective separation and pretreatment of the mixed suspension. The device has a compact structure and a small footprint. The double-layer screen enables the classification and screening of the mixed suspension slurry, improving the accuracy and efficiency of screening.
[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A desliming device, comprising a support (1), a feed buffer distributor (2) mounted on the support (1), a feed body (3) above the feed buffer distributor (2), a desliming box (4) on one side of the feed buffer distributor (2), a pre-screening chute (41) on the other side of the desliming box (4), and a media-collecting chute (42) at the bottom of the desliming box (4), characterized in that, The desizing box (4) is equipped with a first screen body (5) and a second screen body (6). The discharge port of the feed buffer distributor (2) is connected to the feed end of the first screen body (5). The discharge ends of the first screen body (5) and the second screen body (6) are connected to the pre-screen chute (41).
2. The desiccant removal device according to claim 1, characterized in that, The feed end of the first screen body (5) and the second screen body (6) are higher than the discharge end, with an inclination angle of 5° to 50°.
3. The desiccant removal device according to claim 2, characterized in that, The first screen body (5) and the second screen body (6) are flat screen plates. The screen plates can be one or more of the following screen slot forms: perforated screen plate, grid screen, bar screen or slotted screen. The screen plates are fixed in the screen frame by a snap fastener.
4. The desliming device according to claim 2, characterized in that, The first sieve body (5) and the second sieve body (6) are cylindrical sieve barrels, and the first sieve body (5) and the second sieve body (6) are rotatably installed in the desizing box (4).
5. The desiccant removal device according to claim 1, characterized in that, The feed pipe diameter of the feed body (3) is in the range of DN100~DN500.
6. The desiccant removal device according to claim 1, characterized in that, The desliming chamber (4) is equipped with a water replenishment unit (7). The water replenishment unit adopts a linear water replenishment structure, and the water replenishment pressure is controlled at 0.1 to 0.3 MPa. The nozzle adopts a duckbill structure.
7. The desiccant removal device according to claim 1, characterized in that, The feeding buffer feeder (2) adopts a buffer overflow structure for its feed box.