Vertical centrifugal machine

Abstract

The utility model relates to a vertical centrifugal machine which comprises a cylindrical shell, a coaxial main shaft is arranged in the shell, a coaxial rotatable feeding pipe is arranged at the top of the shell, and a discharging opening is formed in the bottom of the shell. A plurality of straight flow guide grooves are arrayed on the outer wall of the inner rotary drum at equal intervals in the circumferential direction, and the straight flow guide grooves extend to the bottom of the inner rotary drum from the top of the inner rotary drum; the outer side of the inner drum is sleeved with the conical outer drum, the side wall of the outer drum is of a filter screen structure, the diameter of the discharging port is larger than that of the bottom face of the outer drum, the bottom end of the feeding pipe is fixedly connected with the outer edge of the top end of the outer drum, and the inner side wall of the outer drum is attached to the outer side wall of the inner drum; and the outer rotary drum and the inner rotary drum synchronously rotate with the main shaft. According to the centrifugal machine, continuous operation can be achieved, downward component force is provided for materials in the centrifugal process by means of the inclination of the side wall of the conical rotary drum, so that the materials continuously move downwards in the centrifugal process, and continuous feeding and discharging are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a vertical centrifuge. Background Art

[0002] The sodium nitrite product contains chloride ions and sodium nitrate components. Both of these soluble salts are very soluble in water and are brought into the product through the water carried by the product. The principle is to use a primary centrifuge to spin dry the slurry from the thickener. After spinning, the crystals will have a small amount of water carried and sodium nitrate and chloride ions dissolved in the water. The crystals fall into the washing tank, and then soft water is added to the washing tank to wash and dilute the small amount of chloride ions and sodium nitrate carried by the crystals. The washed slurry is then sent to a secondary centrifuge for drying. The sodium nitrate and chloride ion content in the product will be reduced, and the purity of the sodium nitrite will be improved, so as to prepare high-quality sodium nitrite.

[0003] Since vertical centrifuges have higher dehydration efficiency than horizontal centrifuges, vertical centrifuges are mostly used in the above process. However, vertical centrifuges in the prior art cannot operate continuously. For example, a full-process automatic vertical centrifuge disclosed in the utility model patent with application number 202223229019.2 needs to take out the centrifuge cylinder after centrifugation, and then take out the filter cake obtained by centrifugation. Therefore, the machine needs to be stopped during the processing, and the production efficiency is low. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned technology, the utility model provides a vertical centrifuge, comprising a cylindrical shell, a coaxial main shaft is arranged in the shell, a coaxial rotatable feed pipe is arranged on the top of the shell, and a discharge port is arranged at the bottom of the shell; a conical inner drum is sleeved on the outside of the main shaft, and a plurality of straight flow guide grooves are arranged in a circumferentially equidistant array on the outer wall of the inner drum, and the straight flow guide grooves extend from the top of the inner drum to the bottom of the inner drum; a conical outer drum is sleeved on the outside of the inner drum, the side wall of the outer drum is a filter structure, the diameter of the discharge port is larger than the diameter of the bottom surface of the outer drum, the bottom end of the feed pipe is fixedly connected to the outer edge of the top of the outer drum, and the inner side wall of the outer drum is in contact with the outer side wall of the inner drum; the outer drum and the inner drum both rotate synchronously with the main shaft.

[0005] Wherein, a conical skirt is sleeved on the outer side of the outer drum, the top of the inner wall of the skirt is adjacent to the bottom of the outer wall of the outer drum; the bottom of the outer wall of the skirt is fixedly connected to the inner wall of the discharge port.

[0006] Wherein, a scraper is arranged on the inner side wall of the skirt plate, and the scraper is adjacent to the bottom end of the outer drum.

[0007] Wherein, a spray pipe is arranged inside the shell, the water outlet of the spray pipe faces the outer side wall of the outer drum, and the spray pipe is located outside the outer drum.

[0008] Wherein, the bottom of the inner drum and the outer drum are fixedly connected to the main shaft through a plurality of connecting rods.

[0009] Among them, a plurality of curved flow grooves are arranged in an equidistant array on the outer wall of the inner drum, and the plurality of curved flow guide grooves are arranged alternately with the plurality of straight flow guide grooves, and the curved flow guide grooves extend from the top of the inner drum to the bottom of the inner drum.

[0010] Wherein, a coaxial circular cover plate is arranged in the feed pipe, a plurality of feeding holes are arranged at equal intervals on the outer edge circumference of the cover plate, and the bottom surface of the cover plate is connected to the top of the outer drum.

[0011] The beneficial effects of the utility model are as follows: the vertical centrifuge provided by the utility model can operate continuously, and utilizes the slope of the side wall of the conical drum to provide a downward force to the material during the centrifugal process, so that the material continues to move downward during the centrifugal process, thereby realizing continuous feeding and discharging;

[0012] In addition, by switching different diversion channels, the time for the material to pass through the diversion channel can be controlled, thereby changing the dehydration rate according to production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 It is a schematic diagram of the inner drum of the utility model;

[0016] Figure 3 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 4 The internal structure of the utility model is shown in FIG. Figure 3 .

[0018] Description of Reference Numerals

[0019] 1. Shell, 11. Feed pipe, 12. Discharge port, 13. Drain port, 14. Spray pipe, 2. Outer drum, 21. Connecting rod, 3. Cover plate, 31. Feeding hole, 4. Inner drum, 41. Straight guide groove, 42. Curved guide groove, 5. Skirt plate, 6. Main shaft, 7. Drive wheel, 8. Scraper. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0021] like Figures 1 to 4 As shown, a vertical centrifuge provided by an embodiment includes

[0022] A cylindrical housing 1 is provided with a coaxial main shaft 6 inside the housing 1, a transmission wheel 7 is provided at the bottom of the main shaft 6, an additional transmission wheel 7 is provided outside the housing 1, the additional transmission wheel 7 is driven by a motor, belts are provided outside the two transmission wheels 7 for transmission, a coaxial rotatable feed pipe 11 is provided on the top of the housing 1, that is, a bearing is provided outside the feed pipe 11 to be rotatably connected to the housing 1, and a discharge port 12 is provided at the bottom of the housing 1;

[0023] A conical inner drum 4 is sleeved on the outer side of the main shaft 6, and a plurality of straight flow guide grooves 41 are arranged in an equidistant array on the outer wall of the inner drum 4, and the straight flow guide grooves 41 extend from the top of the inner drum 4 to the bottom of the inner drum 4;

[0024] The conical outer drum 2 is sleeved on the outer side of the inner drum 4, the side wall of the outer drum 2 is a filter structure, the diameter of the discharge port 12 is larger than the bottom diameter of the outer drum 2, the bottom end of the feed pipe 11 is fixedly connected to the outer edge of the top of the outer drum 2, and the inner wall of the outer drum 2 is in contact with the outer wall of the inner drum 4;

[0025] The bottom of the inner drum 4 and the outer drum 2 are fixedly connected to the main shaft 6 through multiple connecting rods 21, so that the outer drum 2 and the inner drum 4 rotate synchronously with the main shaft 6, the inner diameter of the top opening of the inner drum 4 is equivalent to the diameter of the main shaft 6, and the top end faces of the two drums are flush with the top end face of the main shaft 6, and the bottom faces of the two drums are flush.

[0026] When in use, it is driven by an external motor and transmitted through two transmission wheels 7 to drive the main shaft 6 to rotate, discharge the material from the feed pipe 11, and the water-containing material enters the straight guide groove 41. Due to the centrifugal force provided by the rotation of the two drums, the liquid in the water-containing material is thrown out and enters between the outer drum 2 and the shell 1 and is discharged from the drain port 13. The solid in the water-containing material is intercepted by the outer drum 2. Due to the horizontal outward centrifugal force and the inclined side wall of the outer drum 2, the solid is separated downward. Therefore, during the centrifugal process, the solid component continues to move downward until it falls from the bottom of the straight guide groove 41 and is discharged from the discharge port 12, thereby realizing continuous centrifugal dehydration operation.

[0027] Furthermore, a conical skirt plate 5 is sleeved on the outer side of the outer drum 2, and the top of the inner side wall of the skirt plate 5 is adjacent to the bottom of the outer side wall of the outer drum bottom 2;

[0028] The bottom of the outer wall of the skirt plate 5 is fixedly connected to the inner wall of the discharge port 12. The skirt plate 5 can guide the solid components when they fall out from the bottom of the straight guide groove 41 to prevent the filtered solid components from being thrown away due to centrifugal force.

[0029] Furthermore, a scraper 8 is disposed on the inner wall of the skirt plate 5 , and the scraper 8 is adjacent to the bottom end of the outer drum 2 , so as to prevent the filtered solid components from adhering to the bottom of the straight guide groove 41 .

[0030] Furthermore, a spray pipe 14 is provided inside the shell 1, and a water outlet (not shown) of the spray pipe 14 faces the outer wall of the outer drum 2. The spray pipe 14 is located outside the outer drum 2. During maintenance, the filter structure of the outer drum 2 is backwashed and cleaned through the spray pipe 14.

[0031] Furthermore, a plurality of curved flow grooves 42 are arranged in an equidistant array on the outer wall of the inner drum 4 . The plurality of curved flow grooves 42 are alternately arranged with the plurality of straight flow grooves 41 . The curved flow grooves 42 extend from the top of the inner drum 4 to the bottom of the inner drum 4 .

[0032] A coaxial circular cover plate 3 is arranged in the feed pipe 11, and a plurality of discharge holes 31 are equidistantly arranged on the outer circumference of the cover plate 3. The number of the straight guide grooves 41, the curved guide grooves 42 and the discharge holes 31 are consistent. The bottom surface of the cover plate 3 is connected to the top of the outer rotating drum 2. The connection method is that a plurality of screw holes are arranged on the middle circumference of the cover plate 3, and a plurality of screw holes are arranged on the top circumference of the main shaft 6. After the cover plate 3 is rotated, it is fixedly connected to the top surface of the main shaft 6 through the screw holes, and then fixedly connected to the top surface of the outer rotating drum 2.

[0033] When in use, by adjusting the position of the discharge hole 31 on the cover plate 6, the water-containing material passes through the discharge hole 31 and selectively enters the straight guide groove 41 or the curved guide groove 42. When it is necessary to reduce the water content of the filtered solid components, the curved guide groove 42 is used for centrifugal dehydration. Since the curved guide groove 42 is less likely to allow water-containing materials to pass through than the straight guide groove 41, the centrifugal time of the material can be extended and the water content of the filtrate can be reduced.

[0034] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of 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.

Claims

1. A vertical centrifuge, characterized in that: include A cylindrical shell, wherein a coaxial main shaft is arranged inside the shell, a coaxial rotatable feed pipe is arranged on the top of the shell, and a discharge port is arranged on the bottom of the shell; A conical inner drum sleeved on the outer side of the main shaft, wherein a plurality of straight flow guide grooves are arranged in an equidistant array on the outer wall of the inner drum, and the straight flow guide grooves extend from the top of the inner drum to the bottom of the inner drum; A conical outer drum is sleeved on the outer side of the inner drum, the side wall of the outer drum is a filter structure, the diameter of the discharge port is larger than the diameter of the bottom surface of the outer drum, the bottom end of the feed pipe is fixedly connected to the outer edge of the top of the outer drum, and the inner side wall of the outer drum is in contact with the outer side wall of the inner drum; The outer drum and the inner drum both rotate synchronously with the main shaft.

2. A vertical centrifuge according to claim 1, characterized in that: A conical skirt plate is sleeved on the outer side of the outer drum, and the top of the inner side wall of the skirt plate is adjacent to the bottom of the outer side wall of the outer drum; The bottom of the outer side wall of the skirt plate is fixedly connected to the inner side wall of the discharge port.

3. A vertical centrifuge according to claim 2, characterized in that: A scraper is arranged on the inner side wall of the skirt plate, and the scraper is adjacent to the bottom end of the outer drum.

4. A vertical centrifuge according to claim 1, characterized in that: A spray pipe is arranged inside the shell, a water outlet of the spray pipe faces the outer side wall of the outer drum, and the spray pipe is located outside the outer drum.

5. A vertical centrifuge according to claim 4, characterized in that: The bottom of the inner drum and the outer drum are fixedly connected to the main shaft through a plurality of connecting rods.

6. A vertical centrifuge according to any one of claims 1 to 5, characterized in that: The outer wall of the inner drum is provided with a plurality of curved guide grooves arranged in an equidistant array on the circumference, the plurality of curved guide grooves are arranged alternately with the plurality of straight guide grooves, and the curved guide grooves extend from the top of the inner drum to the bottom of the inner drum.

7. A vertical centrifuge according to claim 6, characterized in that: A coaxial circular cover plate is arranged in the feeding pipe, a plurality of feeding holes are arranged at equal intervals on the outer edge circumference of the cover plate, and the bottom surface of the cover plate is connected to the top of the outer drum.

Images