Multistage separation centrifugal machine
By designing multi-stage rotary drums in the centrifuge, each rotary drum is driven independently and run at different speeds, the problem of material loss when the existing centrifuge is increased in processing speed is solved, and efficient and low-loss material separation effect is achieved, and economic benefits are improved.
Patent Information
- Application Number
- CN202421947477.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-12
AI Technical Summary
While increasing the material processing rate, it is difficult to avoid material loss, especially when the material particle size distribution is wide, increasing the drum speed will lead to small-particle material loss, and reducing the drum speed will affect the processing rate.
A multi-stage separation centrifuge is designed, including multiple rotary drums, each rotary drum driven by an independent drive device, allowing each rotary drum to operate at different speeds. The inner drum rotates at a high speed to generate large centrifugal force, so large-particle materials are preferred to intercept large-particle materials. After the liquid phase and small-particle materials pass through the inner drum, they come into contact with the outer drum with lower rotation speed, achieving comprehensive separation.
Through the multi-stage drum design, the efficiency of the centrifugal process is improved, material loss is reduced, and the use of water is reduced by multiple use of water washing liquid, and economic benefits are improved. The problems of low efficiency of traditional single drum centrifuges are overcome, easy to leak materials and waste detergents during cleaning are overcome.
Smart Images
Figure CN223027533U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solid-liquid separation equipment, and more specifically, to a multi-stage separation centrifuge. Background Art
[0002] A centrifuge is a device that uses the principle of centrifugal separation to separate solids from liquids. The centrifuge has a cylinder that rotates at high speed around its own axis, called a drum, which is usually driven by an electric motor. The drum is connected to the filter cover support sleeve, and the filter cover support sleeve is provided with a main shaft. The motor transmits power to the main shaft, and then drives the filter cover support sleeve and the drum to rotate synchronously through the main shaft.
[0003] The inner wall of the drum is equipped with a filter bag. During the centrifugation process, the drum performs a fixed rotational motion, and the material and the filter bag on the inner wall of the drum are in conflict, so that the solid phase and the liquid phase are separated quickly. The particle size distribution of the centrifuged material is relatively wide. If the rotation speed of the drum is increased in order to improve the centrifugal efficiency, the smaller particle size part of the material will be separated from the drum along with the liquid phase, resulting in material loss. In order to avoid material loss, the rotation speed of the drum needs to be reduced, which requires a relatively long time for solid-liquid separation, which will inevitably affect the material processing rate.
[0004] Therefore, how to reduce material loss while ensuring the material processing rate has become a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content
[0005] In view of this, an object of the present invention is to provide a multi-stage separation centrifuge to reduce material loss while ensuring material processing rate.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A multi-stage separation centrifuge, comprising:
[0008] Shell assembly;
[0009] A drum assembly is arranged inside the shell assembly, the drum assembly comprises at least two drums, the drums are arranged in sequence, there is an interlayer space between any two adjacent drums, and filter holes are opened on the drums;
[0010] The driving assembly includes a driving device which is driven in one-to-one correspondence with each of the rotating drums.
[0011] Optionally, in the above-mentioned multi-stage separation centrifuge, in any two adjacent drums, the pore size of the filter holes of the drum located in the inner layer is larger than the pore size of the filter holes of the drum located in the outer layer; and / or,
[0012] Among any two adjacent ones of the said drums, the arrangement density of the filter holes of the drum located in the inner layer is greater than that of the filter holes of the drum located in the outer layer.
[0013] Optionally, in the above-mentioned multi-stage separation centrifuge, the axes of all the said drums are the same; and / or,
[0014] The diameter ratio of any two adjacent ones of the said drums is 1:(1.2 - 1.4).
[0015] Optionally, in the above-mentioned multi-stage separation centrifuge, a filter cover support sleeve is connected to each of the said drums, the filter cover support sleeve is coaxially arranged with the corresponding drum and is located inside the drum;
[0016] The filter cover support sleeve is connected to a main shaft, and the driving device is in transmission connection with the main shaft of the filter cover support sleeve.
[0017] Optionally, in the above-mentioned multi-stage separation centrifuge, the filter cover support sleeves corresponding to all the said drums are coaxially and nested with each other;
[0018] The main shafts of all the filter cover support sleeves are coaxially and nested with each other.
[0019] Optionally, in the above-mentioned multi-stage separation centrifuge, filter cloths are laid on the inner walls of all the said drums, and the filter cloth of each drum is supported by the filter cover support sleeve corresponding to the drum.
[0020] Optionally, in the above-mentioned multi-stage separation centrifuge, the housing assembly includes:
[0021] A bottom plate;
[0022] An outer shell, arranged on the bottom plate, and the drum assembly is arranged in the space surrounded by the outer shell and the bottom plate.
[0023] Optionally, in the above-mentioned multi-stage separation centrifuge, the outer shell includes an outer shell body and a detachable outer shell cover arranged on the top of the outer shell body. A water adding pipe and a feeding pipe are arranged on the outer shell cover. The water adding pipe is used for adding water into the innermost drum, and the feeding pipe is used for adding materials into the innermost drum.
[0024] Optionally, in the above-mentioned multi-stage separation centrifuge, a scraper assembly is further included, and the scraper assembly includes:
[0025] A telescopic control device, arranged on the outer shell cover, and the telescopic output end of the telescopic control device extends into the innermost drum;
[0026] A scraper, fixed to the telescopic output end of the telescopic control device, for scraping the materials on the inner wall of the innermost drum flat.
[0027] Optionally, in the above-mentioned multi-stage separation centrifuge, shock absorbers are provided at the bottom of the bottom plate.
[0028] The multi-stage separation centrifuge provided by the present utility model is different from the centrifuge in the prior art in that a plurality of drums are provided, and each drum is driven by a different driving device, so that the rotation speed of each drum can be controlled according to requirements, and each drum can operate at different rotation speeds. When the particle size distribution in the material to be separated is relatively wide, the rotation speed of the inner drum can be increased to generate a larger centrifugal force, so as to preferentially intercept large-particle materials. Small-particle materials and liquid phase pass through the inner drum and then contact the outer drum with a lower rotation speed, intercepting all particles with different particle sizes. In this way, the multi-stage design improves the efficiency of the entire centrifugation process, reduces the usage amount of washing liquid, and improves economic benefits. In short, the multi-stage centrifugation design can overcome the problems of low efficiency, easy material leakage, and waste of detergent during the cleaning process of traditional single-drum centrifuges, and has high application value. Description of the Drawings
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0030] Figure 1 It is a schematic structural diagram of the multi-stage separation centrifuge disclosed in the embodiment of the present utility model.
[0031] The meanings of the various reference numerals in the drawings are as follows:
[0032] 101 - bottom plate; 102 - outer shell; 103 - inner drum; 104 - outer drum; 105 - filter cover support sleeve; 106 - scraper assembly; 107 - water supply pipe; 108 - inner driving device; 109 - outer driving device; 110 - belt pulley; 111 - shock absorber; 112 - feeding pipe. Specific Embodiments
[0033] The core of the present utility model is to provide a multi-stage separation centrifuge to reduce material loss on the premise of ensuring the material processing rate.
[0034] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the utility model content described in the claims in any way. Moreover, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the utility model described in the claims. It should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. Without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0035] As Figure 1 shown, an embodiment of the present utility model discloses a multi-stage separation centrifuge, which includes a housing assembly, a drum assembly, and a drive assembly. Among them, the housing assembly is used to provide an installation basis for other components of the multi-stage separation centrifuge, and at the same time can also provide a protection function for the drum assembly.
[0036] The drum assembly is arranged inside the housing assembly. The drum assembly includes at least two drums, and the drums are arranged in a nested manner in sequence. There is an interlayer space between any two adjacent drums, and the interlayer space can accommodate small particle materials centrifuged out by the inner drum. The drum is provided with filter holes so that under the action of centrifugal force, the liquid phase in the material to be centrifuged can pass through the filter holes, while the solid phase cannot pass through the filter holes, thereby realizing the separation of the liquid phase and the solid phase. It should be noted that the number of drums can be selected according to the material to be centrifuged. If the particle size of the material is relatively uniform, a smaller number of drums can be selected. Correspondingly, if the particle size range of the material is relatively wide, a larger number of drums can be selected.
[0037] The drive assembly includes drive devices that are in one-to-one correspondence with each drum. Since each drum is driven by an independent drive device, the rotation speed of each drum can be controlled according to requirements. The type of the drive device is not limited. For example, it can be any device that can output rotational motion such as a motor or a motor.
[0038] The multi-stage separation centrifuge provided by the present utility model is different from the centrifuge in the prior art in that a plurality of drums are provided, and each drum is driven by a different drive device, so that the rotation speed of each drum can be controlled according to requirements, and each drum can operate at different rotation speeds. When the particle size distribution in the material to be separated is relatively wide, the rotation speed of the inner drum can be controlled to generate a larger centrifugal force to intercept the large particle materials preferentially, that is, to realize the separation of large particle materials and small particle materials more quickly.
[0039] The small particle materials and the liquid phase pass through the inner drum and then pass through the outer drum with a lower rotation speed to realize the separation of the small particle materials and the liquid phase, which can not only prevent the small particle materials from being centrifuged out of the drum, but also ensure that particles of different particle sizes are all intercepted, reducing the loss of materials.
[0040] In addition, when cleaning the material, since the water washing liquid after cleaning the innermost drum can enter the next-level drum under the action of centrifugal force and clean the material in the next-level drum, the water washing liquid can be reused multiple times, reducing the usage amount of the water washing liquid.
[0041] In summary, the multi-stage separation centrifuge disclosed in this embodiment has a multi-stage drum design that improves the efficiency of the entire centrifugation process, reduces the usage amount of the water washing liquid, and improves economic benefits. In short, the multi-stage centrifugation design can overcome problems such as low efficiency, easy material leakage, and large consumption of detergents during the cleaning process of traditional single-drum centrifuges, and has high application value.
[0042] Taking the drum with two layers as an example, the drum located inside is the inner drum 103, and the drum located outside is the outer drum 104. The driving device for driving the inner drum 103 to rotate is the inner driving device 108, and the driving device for driving the outer drum 104 to rotate is the outer driving device 109.
[0043] The outer drum 104 is sleeved outside the inner drum 103 and has a certain distance from the inner drum 103 to ensure a sandwich space with a corresponding width. The material to be centrifuged can be dissolved outside the centrifuge, and the dissolved solid-liquid mixture is poured into the inner drum 103. The inner driving device 108 drives the inner drum 103 to rotate at a first speed, and the outer driving device 109 drives the outer drum 104 to rotate at a second speed. The first speed is greater than the second speed. For example, the first speed can be 1000 rpm to 2500 rpm, and the second speed can be 200 rpm to 800 rpm.
[0044] Since the rotation speed of the inner drum 103 is relatively high, the material to be centrifuged in the inner drum 103 is subjected to a relatively large centrifugal force of the inner drum 103, and the separation of large-particle materials in the material to be centrifuged can be quickly completed, that is, the large-particle materials are intercepted in the inner drum 103, and the liquid phase and small-particle materials pass through the inner drum 103 and enter the sandwich space between the inner drum 103 and the outer drum 104, which can also be understood as entering the outer drum 104.
[0045] Since the rotation speed of the outer drum 104 is relatively low, the material to be centrifuged in the outer drum 104 is subjected to a relatively small centrifugal force of the outer drum 104. On the premise of being able to achieve the separation of the liquid phase and the solid phase, due to the relatively small centrifugal force, small-particle materials can be prevented from being centrifuged out of the outer drum 104, so the loss of materials can be reduced. Although the rotation speed of the outer drum 104 is relatively low, since most of the large-particle materials have been quickly separated by the inner drum 103, the material in the outer drum 104 is only a small part, so it will not have a significant impact on the entire centrifugation time of the material due to the relatively low rotation speed of the outer drum 104.
[0046] Those skilled in the art can understand that the materials need to be cleaned inside the drum. The cleaning agent can be water. When cleaning, water can be sprayed into the inner drum 103. Since the drum has multiple layers (such as the inner drum 103 and the outer drum 104), the water for cleaning is inside the inner drum 103. After cleaning the materials inside the inner drum 103, under the action of the centrifugal force of the inner drum 103, it can enter the outer drum 104 to clean the materials inside the outer drum 104, improving the utilization rate of water.
[0047] It should be noted that although the multi-stage separation centrifuge disclosed in this embodiment has multiple drums, in actual use, only the innermost drum can also be used, that is, the other drums can remain stationary. For example, when the particle sizes of the materials to be centrifuged are relatively uniform, only the innermost drum can be turned on, that is, the single-drum mode is selected to avoid waste of resources.
[0048] In addition, the foregoing is only for the convenience of understanding the solution, and taking the example of only having two drums (the inner drum 103 and the outer drum 104) for introduction. In addition, several mutually nested intermediate drums (not shown in the figure) can also be provided between the inner drum 103 and the outer drum 104 according to requirements. That is, for the multi-stage separation centrifuge disclosed in this embodiment, its multi-stage drums can be two-stage, three-stage, four-stage, etc., and the specific number of drum stages can be selected according to actual needs.
[0049] In a specific embodiment of the present utility model, among any two adjacent drums, the aperture of the filter holes of the drum located inside is larger than the aperture of the filter holes of the drum located outside. Still taking the two drums as an example, the aperture of the filter holes of the inner drum 103 is larger than the aperture of the filter holes of the outer drum 104. In this embodiment, the aperture of the filter holes of the inner drum 103 is designed to be larger, and with a larger rotational speed, it can facilitate the rapid separation of large-particle materials and small-particle materials. The aperture of the filter holes of the outer drum 104 is designed to be smaller, and with a smaller rotational speed, it can prevent small-particle materials from being centrifuged out of the outer drum 104.
[0050] Among any two adjacent drums, the arrangement density of the filter holes of the drum located inside is greater than the arrangement density of the filter holes of the drum located outside. The arrangement density of the filter holes refers to the number of filter holes per unit area. In the same area, the more the number of filter holes, the greater the arrangement density of the filter holes; on the contrary, in the same area, the fewer the number of filter holes, the smaller the arrangement density of the filter holes.
[0051] Taking a two-layer rotating drum as an example, the arrangement density of the filter holes of the inner rotating drum 103 is greater than that of the outer rotating drum 104. In this embodiment, the arrangement density of the filter holes of the inner rotating drum 103 is designed to be relatively large, and combined with a relatively high rotational speed, it is convenient to quickly separate large-particle materials from small-particle materials. The arrangement density of the filter holes of the outer rotating drum 104 is designed to be relatively small, and combined with a relatively low rotational speed, it can prevent small-particle materials from being centrifuged out of the outer rotating drum 104.
[0052] In a specific embodiment of the present utility model, the axes of each rotating drum are the same, that is, each rotating drum is coaxially arranged to ensure that the width of the interlayer space between adjacent rotating drums is equal at any position in the circumferential direction. Such a setting can avoid the problem that the thickness of the material intercepted on the inner wall of the rotating drum due to centrifugal force is uneven due to different widths of the interlayer space at different positions. That is, it can avoid the problem that the material thickness is thinner in the narrower area and thicker in the wider area in the interlayer space. Subsequently, it can avoid the problem of the center of gravity shifting due to uneven material thickness.
[0053] The diameter ratio of any two adjacent rotating drums can be designed as 1:(1.2 - 1.4), that is, the width of the interlayer space is maintained at 0.1 - 0.2 times the diameter of the rotating drum (the inner rotating drum of the two adjacent rotating drums). It should be noted that the diameter ratio of any two adjacent rotating drums can also be designed as other proportional relationships according to requirements, and is not limited to 1:(1.2 - 1.4) in the above embodiment.
[0054] Each rotating drum is connected with a filter cover support sleeve 105. The filter cover support sleeve 105 is coaxially arranged with the corresponding rotating drum and is located inside the rotating drum. The rotating drum is rigidly connected to the corresponding filter cover support sleeve 105. For example, it can be designed as an integral structure, or can be fixedly connected by fasteners, or can also be connected by welding, as long as it can ensure that the rotating drum and the filter cover support sleeve 105 corresponding to this rotating drum rotate synchronously.
[0055] The filter cover support sleeve 105 is connected with a main shaft, and the driving device is in transmission connection with the main shaft of the filter cover support sleeve 105. Specifically, a belt pulley 110 can be arranged on the main shaft, and the driving device can be a driving motor. A belt pulley is also arranged on the output shaft of the driving motor, and the driving connection between the driving device and the main shaft is realized by using a transmission belt, that is, the belt drive method.
[0056] The filter cover support sleeves 105 corresponding to each rotary drum are coaxially arranged and nested with each other, that is, the filter cover support sleeves 105 corresponding to each rotary drum are nested in a similar way to the nesting of each rotary drum, and also adopt a nested connection with each other. It should be noted that although the filter cover support sleeves 105 are nested with each other, a gap should be set between them so that each filter cover support sleeve 105 can rotate independently. Similarly, the main shafts of the filter cover support sleeves 105 are coaxially arranged and nested with each other. That is, except for the innermost main shaft, the other main shafts are all tubular structures to ensure that they can be nested with each other. To prevent friction between the main shafts due to contact, bearings can be arranged between two adjacent main shafts for support.
[0057] The bottom of the filter cover support sleeve 105 of the outer rotary drum 104 is not closed, so that the filter cover support sleeve 105 of the inner rotary drum 103 can extend into its interior from the bottom of the filter cover support sleeve 105 of the outer rotary drum 104 to achieve coaxial nested connection. Since the bottom of the filter cover support sleeve 105 of the inner rotary drum 103 does not need to nest other filter cover support sleeves 105, a closed structure can be adopted.
[0058] It should be noted that filter cloths are laid on the inner walls of each rotary drum, and the filter cloth of each rotary drum is supported by the filter cover support sleeve 105 corresponding to the rotary drum. The inner rotary drum has the highest speed and can be paired with a filter cloth with a lower mesh number to intercept large-particle materials first. Subsequently, the rotational speeds of the middle layer and the outermost layer of the rotary drums decrease in turn, and the mesh numbers of the filter cloths can be increased accordingly to intercept particles of different particle sizes of the materials. In addition, the fixing method of the filter cloth in the rotary drum can be the same as that in the prior art, and will not be elaborated herein.
[0059] In a specific embodiment of the present utility model, the housing assembly may include a bottom plate 101 and an outer housing 102. Among them, the outer housing 102 is arranged on the bottom plate 101, and the rotary drum assembly is arranged in the space surrounded by the outer housing 102 and the bottom plate 101. The bottom plate 101 is used to provide support for the rotary drum and the driving device, and the outer housing 102 is used to cover the outside of the rotary drum assembly so that the centrifuged liquid phase is confined inside the outer housing 102 to avoid polluting the surrounding environment. The separated liquid phase can be drained away through a drain pipe installed on the bottom plate 101, and the drain pipe needs to be connected outside the outermost rotary drum. To facilitate the timely drainage of the liquid phase, a corresponding water collecting structure can be arranged on the bottom plate 101. Under the action of the water collecting structure, the separated liquid phase is converged to a position connected to the drain pipe and finally drained away through the drain pipe.
[0060] Furthermore, the outer housing 102 includes an outer housing body and a detachable outer housing cover arranged on the top of the outer housing body. A water adding pipe 107 and a feeding pipe 112 are arranged on the outer housing cover. The water adding pipe 107 is used to add water (i.e., washing liquid) into the innermost rotary drum to clean the materials in the rotary drum. The feeding pipe 112 is used to add materials into the innermost rotary drum.
[0061] The outer shell cover can be switched between open and closed states. During the centrifugation process, the outer shell cover needs to be in the closed state to prevent the material from being thrown out of the centrifuge under the action of centrifugal force. After the centrifugation work is completed, the outer shell cover needs to be opened, and the filter cloth together with the solid phase material intercepted by the filter cloth is lifted and transferred outside the multi-stage separation centrifuge. Outside the multi-stage separation centrifuge, the solid phase material is scraped off the filter cloth to obtain the separated solid phase material.
[0062] When adding materials into the innermost drum through the feeding pipe 112, affected by other factors such as the material addition speed, it is inevitable that the thickness distribution of the materials on the inner wall of the innermost drum is uneven. Whether along the axial direction or the circumferential direction of the drum, there may be uneven thickness.
[0063] Based on the above problems, in a specific embodiment of the present utility model, the multi-stage separation centrifuge may further include a scraper assembly 106. The scraper assembly 106 includes a telescopic control device and a scraper. Among them, the telescopic control device is arranged on the outer shell cover, and the telescopic output end of the telescopic control device extends into the innermost drum. It should be noted that the telescopic control device can be any driving device that can output linear motion, such as a linear motor, a cylinder, a hydraulic cylinder, etc.
[0064] The scraper is fixed to the telescopic output end of the telescopic control device, and the telescopic control device can drive the scraper to reciprocate along the axial direction of the drum. During the reciprocating movement of the scraper along the axial direction of the drum, it can scrape the materials on the inner wall of the innermost drum flat, so that the thickness of the materials on the inner wall of the drum remains uniform both in the axial direction and the circumferential direction of the drum, avoiding the problem of center of gravity deviation caused by uneven thickness distribution, and then avoiding the shaking caused by the center of gravity deviation when the drum rotates.
[0065] Those skilled in the art can understand that the distance between the scraper and the inner wall of the drum determines the thickness of the materials on the inner wall of the drum. Therefore, the distance between the scraper and the inner wall of the drum needs to be set according to actual needs when installing the scraper assembly 106. In addition, when a filter cloth is provided on the inner wall of the drum, the scraper is used to scrape the materials on the filter cloth on the inner wall of the innermost drum flat.
[0066] During the operation of the multi-stage separation centrifuge, vibration will inevitably occur. If the vibration is too large, it will cause the entire multi-stage separation centrifuge to shake, ultimately affecting the service life of the multi-stage separation centrifuge. Based on this, in this embodiment, shock absorbers 111 are provided at the bottom of the bottom plate 101 to prevent the bottom plate 101 from directly contacting the ground rigidly, resulting in unnecessary vibration and preventing equipment damage.
[0067] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. A method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of other identical elements in the process, method, product, or device that includes the element.
[0068] In the description of this application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.
[0069] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.
[0070] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A multi-stage separation centrifuge, characterized in that: include: Shell assembly; A drum assembly is arranged inside the shell assembly, the drum assembly comprises at least two drums, the drums are arranged in sequence, there is an interlayer space between any two adjacent drums, and filter holes are opened on the drums; The driving assembly includes a driving device which is driven in one-to-one correspondence with each of the rotating drums.
2. The multi-stage separation centrifuge according to claim 1, characterized in that: In any two adjacent drums, the pore size of the filter holes of the drum located in the inner layer is larger than the pore size of the filter holes of the drum located in the outer layer; and / or, In any two adjacent drums, the arrangement density of the filter holes of the drum located in the inner layer is greater than the arrangement density of the filter holes of the drum located in the outer layer.
3. The multi-stage separation centrifuge according to claim 1, characterized in that: The axes of the rotating drums are the same; and / or, The diameter ratio of any two adjacent drums is 1:(1.2-1.4).
4. The multi-stage separation centrifuge according to claim 1, characterized in that: Each of the rotary drums is connected to a filter cover support sleeve (105), and the filter cover support sleeve (105) is coaxially arranged with the corresponding rotary drum and is located inside the rotary drum; The filter cover support sleeve (105) is connected to a main shaft, and the driving device is in driving connection with the main shaft of the filter cover support sleeve (105).
5. The multi-stage separation centrifuge according to claim 4, characterized in that: The filter cover support sleeves (105) corresponding to the respective rotary drums are coaxially and mutually nested; The main axes of the filter cover support sleeves (105) are coaxial and mutually nested.
6. The multi-stage separation centrifuge according to claim 4, characterized in that: The inner wall of each of the rotary drums is paved with filter cloth, and the filter cloth of each of the rotary drums is supported by the filter cover support sleeve (105) corresponding to the rotary drum.
7. The multi-stage separation centrifuge according to any one of claims 1 to 6, characterized in that: The housing assembly comprises: Bottom plate (101); The outer shell (102) is arranged on the bottom plate (101), and the rotating drum assembly is arranged in a space enclosed by the outer shell (102) and the bottom plate (101).
8. The multi-stage separation centrifuge according to claim 7, characterized in that: The outer shell (102) comprises an outer shell body and a detachable outer shell cover arranged on the top of the outer shell body, and the outer shell cover is provided with a water adding pipe (107) and a material adding pipe (112), wherein the water adding pipe (107) is used to add water to the innermost layer of the rotating drum, and the material adding pipe (112) is used to add materials to the innermost layer of the rotating drum.
9. The multi-stage separation centrifuge according to claim 8, characterized in that: Also included is a scraper assembly (106), the scraper assembly (106) comprising: A telescopic control device is arranged on the outer shell cover, and a telescopic output end of the telescopic control device extends into the innermost drum; The scraper is fixed to the telescopic output end of the telescopic control device and is used for scraping the material on the inner wall of the innermost layer of the drum.
10. The multi-stage separation centrifuge according to claim 7, characterized in that: A vibration damper (111) is provided at the bottom of the base plate (101).