Vertical centrifuge with reduced particle adhesion to inner wall of upper housing

Abstract

The utility model discloses a vertical centrifuge that reduces the particle adhesion of the inner wall of upper shell, which comprises a centrifuge body, a scraper is installed in the inner part of the upper shell, a sieve basket is installed on the outer side of the sieve frame between the upper shell and the scraper, the side wall of the sieve basket is provided with uniformly distributed filter holes, the aperture is 0.1-1mm, and it is used for intercepting solid particles with a particle size greater than 0.1mm. The sieve basket is arranged between the scraper and the upper shell on the centrifuge body, so that the scraper rotates under the driving of the output shaft of the differential mechanism, and then the solid-liquid in the coal slime is separated, the fine solid coal slime is intercepted in the inner part of the sieve basket and slides along the sieve basket wall to the bottom of the sieve frame and is discharged, and the liquid enters the upper shell through the filter holes on the sieve basket and is collected. After the sieve basket is added, the particle adhesion amount of the inner wall of the upper shell is reduced by 90%, so that manual cleaning is not needed during shutdown.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically to a vertical centrifuge that reduces particle adhesion to the inner wall of the upper shell. Background Technology

[0002] Existing coal centrifuges are mainly used for solid-liquid separation of coal slime. However, the liquid discharge port of the centrifuge mainly outputs a mixture of solid and liquid. Large solid particles are separated into solid and liquid under the action of the scraper, and there are still many fine solid particles in the separated liquid. These fine solid particles will adhere to the inner wall of the upper shell of the centrifuge, thereby increasing the thickness of the upper shell, reducing the volume of the upper shell cavity, and weakening the centrifugation effect.

[0003] In existing vertical coal centrifuges, the solid layer adhering to the inner wall of the upper shell during production can only be removed manually. This manual removal requires stopping the machine, affecting the centrifuge's solid-liquid separation efficiency for coal slime. Furthermore, the manual cleaning process is cumbersome. Actual measurements show that without a screen basket, the particle adhesion thickness on the inner wall of the upper shell can reach 1-5 mm, resulting in a reduction of at least 2% in the effective volume. At the same time, the liquid discharge pipe is directly installed vertically at the bottom of the shell, causing the separated liquid to accumulate at the bottom of the cavity, which in turn affects the centrifuge's solid-liquid separation efficiency for coal slime. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a vertical centrifuge that reduces particle adhesion to the inner wall of the upper shell, in order to solve the technical problems of existing coal vertical centrifuges, where fine solid particles adhere to the inner wall of the upper shell during the production process, which can only be removed manually. Manual cleaning requires stopping the machine, affecting the centrifuge's solid-liquid separation efficiency for coal slime. In addition, the manual cleaning process is cumbersome, and no screen basket is installed to intercept fine solids. At the same time, the liquid discharge pipe is directly installed vertically at the bottom of the shell, causing the separated liquid to accumulate at the bottom of the cavity, thus affecting the centrifuge's solid-liquid separation efficiency for coal slime.

[0005] According to the technical solution provided in the embodiments of this application, a vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell includes a centrifuge body, and a scraper is installed inside the upper shell. A sieve basket is installed on the outside of the sieve frame between the upper housing and the scraper. The side wall of the sieve basket is provided with uniformly distributed filter holes with a diameter of 0.1-1mm, which are used to intercept solid particles with a diameter greater than 0.1mm. Two liquid discharge pipes are tangentially connected to the lower housing and rotate in the same direction as the scraper, so that the centrifuged liquid is quickly discharged along the tangential liquid discharge pipes.

[0006] Furthermore, the scraper abuts against the screen frame, the center of the rear end of the scraper is fixedly connected to the output shaft of the differential, and the rear end of the screen frame is spaced on the output shaft so that the screen frame and the scraper rotate synchronously.

[0007] Furthermore, the scraper is inclined to the screen frame at an angle of 15°-30°.

[0008] Furthermore, a partition is installed inside the lower housing, and the partition is connected to the discharge port of the screen frame.

[0009] Furthermore, the bottom of the upper housing is connected to the lower housing by fixing bolts.

[0010] Furthermore, the sieve basket has a cylindrical structure, and the diameter of the sieve basket is larger than that of the sieve frame but smaller than that of the upper shell.

[0011] Furthermore, a protective plate is installed on the outside of the motor mounted at the rear end of the differential for the safety protection of the motor.

[0012] In summary, the beneficial effects of this application are as follows: 1. By setting a screen basket between the scraper on the centrifuge body and the upper shell, the scraper rotates at a high speed driven by the output shaft of the differential, thereby separating the solid and liquid in the coal slurry. The fine solid coal slurry is intercepted inside the screen basket and slides down the screen basket wall to the bottom of the screen frame for discharge, while the liquid enters the upper shell for collection through the filter holes on the screen basket. After installing the screen basket, the amount of particles adhering to the inner wall of the upper shell is reduced by 90%, so that there is no need to stop the machine for manual cleaning. Second, by setting two tangentially connected liquid discharge pipes on the upper part of the lower shell and making the direction of the two liquid discharge pipes consistent with the rotation direction of the scraper, the separated liquid can be quickly discharged along the liquid discharge pipes, increasing the liquid discharge speed by 30% and avoiding liquid accumulation in the liquid discharge pipes, thereby improving the solid-liquid separation efficiency of the centrifuge for coal slime. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the centrifuge body in this utility model; Figure 2 This is a schematic diagram of the unfolded structure of the neutral centrifuge body of this utility model.

[0014] The following components are labeled in the diagram: centrifuge body 1, upper shell 11, lower shell 12, scraper 13, sieve frame 14, sieve basket 15, liquid discharge pipe 16, solid discharge port 17, baffle 18, motor 19, protective plate 110, differential gear 120. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] A vertical centrifuge that reduces particle adhesion to the inner wall of the upper casing, its structure is as follows: Figure 1 and Figure 2 As shown, the centrifuge includes a centrifuge body 1, with a scraper 13 installed inside the upper housing 11. The center of the scraper 13 is fixedly mounted on the output shaft of the differential 120, so that the motor 19 drives the pulley to rotate, thereby driving the differential 120 connected to the pulley to rotate. The scraper 13 rotates at 8-12 rpm, and the speed ratio of the differential 120 is 1:1, so that the rotation of the scraper 13 mounted on the output shaft of the differential 120 and the screen basket 15 mounted on the outside of the screen frame 14 rotate synchronously, and the coal slurry input from the feed cylinder is separated into solid and liquid during the rotation.

[0018] like Figure 2 As shown, the screen basket 15 is installed between the upper shell 11 and the screen frame 14. It is bolted to the bottom of the screen frame 14 so that the centrifugal force generated by the scraper 13 during rotation can separate the solid particles and liquid in the coal slime. Larger solid particles are intercepted by the synchronously rotating screen frame 14, while smaller solid particles are intercepted by the screen basket 15. During the rotation of the scraper 13, the solid particles attached to the screen frame 14 are removed so that the particles move along the inclined screen frame 14 into the lower shell 12 and are discharged from the solid discharge port 17 at the bottom of the lower shell 12.

[0019] like Figure 2As shown, the sieve basket 15 is installed inside the upper shell 11, with a diameter smaller than that of the upper shell 11. The sieve basket 15 is made of stainless steel and has a pore density of 50-100 pores / cm², allowing the centrifuged liquid to pass through the pores on the sieve basket 15. The pore diameter of the pores is 0.1-1mm, thereby intercepting solid particles larger than 0.1mm. The separated liquid rotates into the upper shell 11, and a liquid discharge pipe 16 is tangentially connected to the lower shell 12 installed at the bottom of the upper shell 11 for discharge. The installation direction of the liquid discharge pipe 16 is consistent with the rotation direction of the scraper 13, so that the centrifuged liquid is quickly discharged along the tangentially connected liquid discharge pipe 16, preventing liquid from accumulating at the bottom of the shell and thus affecting the separation efficiency and separation quality of the centrifuge.

[0020] like Figure 2 As shown, the scraper 13 abuts against the sieve frame 14. The conical structure of the sieve frame 14 intercepts larger solid particles during centrifugation. A sieve basket 15 is fixed to the outside of the sieve frame 14. The scraper 13 and the sieve frame 14 are set at an inclination angle of 15°-30°, so that the scraper 13 and the sieve frame 14 slide the fine solid particles attached to the sieve basket 15 along the wall of the sieve basket 15 and discharge them along the bottom of the inclined sieve frame 14 during the rotation process.

[0021] like Figure 2 As shown, the upper shell 11 is installed outside the sieve basket 15 and has a larger diameter than the sieve basket 15, so that the liquid filtered by the sieve basket 15 is blocked by the upper shell 11 and collected on the baffle 18 of the lower shell 12 connected to the bottom of the upper shell 11, so that the liquid is discharged from the liquid discharge pipe 16 tangentially connected to the lower shell 12, while the separated solid particles are discharged from the solid discharge port 17 on the lower shell 12.

[0022] The working principle of this utility model of a vertical centrifuge that reduces particle adhesion to the inner wall of the upper shell is as follows: In the process of separating the solid-liquid mixture of coal slime in a centrifuge, traditional centrifuges do not have a screen basket 15 between the scraper and the shell, so that fine solids adhere to the upper shell 11 under centrifugal force, causing solid particles to accumulate and reduce the centrifugal space inside the upper shell 11, thus affecting the solid-liquid separation efficiency of the centrifuge for coal slime. By setting a screen basket 15 between the scraper 13 on the centrifuge body 11 and the upper shell 11, the scraper 13 rotates rapidly under the drive of the output shaft of the differential gear 120, thereby separating the solid and liquid in the coal slime. Large solid coal slime particles are intercepted by the screen frame 14 and directly enter the lower shell 12, while small-diameter solid coal slime particles are intercepted inside the screen basket 15 and slide along the wall of the screen basket 15 to the bottom during centrifugation, and are discharged from the bottom of the screen frame 14 into the lower shell 12. The liquid enters the lower shell 12 for collection through the filter holes on the screen basket 15, thereby improving the separation efficiency and quality of the centrifuge for coal slime; at the same time, in the lower shell 12 Two liquid discharge pipes 16 are tangentially connected to the baffle 18, and the direction of the two liquid discharge pipes 16 is consistent with the rotation direction of the scraper 13, so that the separated liquid can be discharged quickly along the liquid discharge pipes 16. By installing a screen basket 15 in the upper shell 11 of the vertical centrifuge, the amount of particles adhering to the inner wall of the upper shell 11 during centrifugal separation is reduced by 90%, so that manual cleaning is not required. At the same time, tangential liquid discharge pipes 16 are set on the lower shell 12, so that the discharge speed of the separated liquid is increased by 30%, and the liquid is prevented from accumulating at the bottom of the lower shell 12, thereby improving the solid-liquid separation efficiency of the centrifuge for coal slime.

[0023] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and solutions employed. Furthermore, the scope of the utility model involved in this application is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell, comprising a centrifuge body (1), wherein a scraper (13) is installed inside the upper shell (11), characterized in that: A sieve basket (15) is installed on the outside of a sieve frame (14) between the upper housing (11) and the scraper (13). The side wall of the sieve basket (15) is provided with uniformly distributed filter holes with a diameter of 0.1-1 mm, which are used to intercept solid particles with a diameter greater than 0.1 mm. Two liquid discharge pipes (16) are tangentially connected to the lower housing (12) and rotate in the same direction as the scraper (13) so that the centrifuged liquid is quickly discharged along the tangential liquid discharge pipes (16).

2. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 1, characterized in that: The scraper (13) abuts against the screen frame (14), the center of the rear end of the scraper (13) is fixedly connected to the output shaft of the differential (120), and the rear end of the screen frame (14) is spaced on the output shaft so that the screen frame (14) and the scraper (13) rotate synchronously.

3. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 1, characterized in that: The scraper (13) and the sieve frame (14) are arranged at an angle of 15° to 30°.

4. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 1, characterized in that: The lower housing (12) is equipped with a partition, which is connected to the discharge port of the screen frame (14).

5. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 1, characterized in that: The bottom of the upper housing (11) is connected to the lower housing (12) by fixing bolts.

6. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 1, characterized in that: The sieve basket (15) has a cylindrical structure, and the diameter of the sieve basket (15) is larger than that of the sieve frame (14) and smaller than that of the upper shell (11).

7. A vertical centrifuge for reducing particle adhesion on the inner wall of the upper shell according to claim 2, characterized in that: A protective plate (110) is installed on the outside of the motor (19) mounted at the rear end of the differential (120) for the safety protection of the motor (19).

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