CN209917415U

CN209917415U - Filter equipment suitable for sewage treatment

Info

Publication number: CN209917415U
Application number: CN201920231895.8U
Authority: CN
Inventors: 牟平
Original assignee: Sichuan Zhilvyuan Environmental Protection Technology Co Ltd
Current assignee: Sichuan Zhilvyuan Environmental Protection Technology Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-01-10
Anticipated expiration: 2029-02-20

Abstract

A filtering device suitable for sewage treatment relates to the field of sewage treatment equipment. Comprises a tank body, a first classifying screen cylinder and a second classifying screen cylinder. One end of the tank body is provided with a first opening, and one end of the tank body, which is far away from the first opening, is provided with a drain pipe. The first sub-sieve section of thick bamboo is rotationally located in the jar body, and the second sub-sieve section of thick bamboo is rotationally located in the first sub-sieve section of thick bamboo. One end of the first screening drum close to the first opening is provided with a second opening, and one end of the second screening drum close to the first opening is provided with a third opening. The first screening drum and the second screening drum are driven by a driving motor and rotate in opposite directions. The sieve mesh has all been seted up to the lateral wall of the two of first branch sieve section of thick bamboo and second branch sieve section of thick bamboo, and the sieve mesh aperture of first branch sieve section of thick bamboo is less than the sieve mesh aperture of second branch sieve section of thick bamboo. It can realize the primary separation of sewage, accomplishes the categorised collection of solid rubbish and sewage to improve the conveying efficiency of categorizing, improved the treatment effeciency in the sewage collection stage greatly.

Description

Filter equipment suitable for sewage treatment

Technical Field

The utility model relates to a sewage treatment device field particularly, relates to a filter equipment suitable for sewage treatment.

Background

In the sewage treatment work, scenic spot sewage and rural sewage generally have the characteristics of large quantity and dispersion, and the workload is particularly large for sewage collection. In the actual treatment process, the collection efficiency and the treatment period of scenic spot sewage and rural sewage are also longer.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a filtering device which can realize the primary separation of sewage and finish the classified collection of solid garbage and sewage, thereby improving the classified transportation efficiency and greatly improving the treatment efficiency in the sewage collection stage; the device is convenient to use, is suitable for collecting and treating dispersed sewage such as scenic area sewage, rural sewage and the like, is convenient to operate, and is convenient to clean and maintain.

The embodiment of the utility model is realized like this:

a filtration device suitable for sewage treatment, comprising: base, stand, jar body, first minute sieve section of thick bamboo and second minute sieve section of thick bamboo. The stand is located the base, and the jar body rotationally connects in the stand and by servo motor drive, and the axis of rotation axis heart of the jar body is perpendicular to its central axis setting.

One end of the tank body is provided with a first opening for communicating the inner cavity of the tank body with the outside, and one end of the tank body, which is far away from the first opening, is provided with a drain pipe communicated with the inner cavity of the tank body. The inner chamber of jar body is rotationally located to first minute sieve section of thick bamboo, and the inner chamber of first minute sieve section of thick bamboo is rotationally located to second minute sieve section of thick bamboo. The first classifying screen cylinder, the second classifying screen cylinder and the tank body are coaxially arranged, and the rotating axis lines of the first classifying screen cylinder and the second classifying screen cylinder are coincided with the central axis of the tank body. One end of the first screening drum close to the first opening is provided with a second opening for communicating the inner cavity of the first screening drum with the outside, and one end of the second screening drum close to the first opening is provided with a third opening for communicating the inner cavity of the second screening drum with the outside.

The first screening drum and the second screening drum are driven by a driving motor and rotate in opposite directions. The sieve mesh has all been seted up to the lateral wall of the two of first branch sieve section of thick bamboo and second branch sieve section of thick bamboo, and the sieve mesh aperture of first branch sieve section of thick bamboo is less than the sieve mesh aperture of second branch sieve section of thick bamboo.

Further, the filter device also comprises a driving shaft, and the driving shaft is arranged along the central axis of the tank body. The driving shaft penetrates through the end parts, far away from the first opening, of the tank body and the first screening drum and is connected with the end part, far away from the first opening, of the second screening drum. The driving shaft is in transmission connection with the first sieving barrel through a planetary gear, and the driving shaft is in transmission connection with a driving motor.

Furthermore, the driving shaft is provided with an outer gear ring, the driving shaft is also matched with a shaft sleeve, the shaft sleeve is provided with an inner gear ring, the planetary gear is positioned between the outer gear ring and the shaft sleeve and is simultaneously meshed with the outer gear ring and the shaft sleeve, and the first classifying screen cylinder is fixedly connected with the shaft sleeve. The drive shaft still cooperates and has reinforced beam, and reinforced beam all connects in the inner wall of the jar body along the radial setting of the jar body and its both ends, and reinforced beam is located one side of keeping away from first open-ended of a first branch sieve section of thick bamboo, and the drive shaft runs through reinforced beam and rotationally cooperates in reinforced beam. The rotating shafts of the planetary gears are connected to the reinforcing beam.

Further, driving motor locates the outer wall of the jar body and is located the top of the jar body, is connected by synchronous belt drive between driving motor and the drive shaft.

Furthermore, the inner wall of one end of the tank body, which is far away from the first opening, is spherical, and the circle center of the corresponding spherical surface is positioned on one side of the tank body, which is close to the first opening.

Furthermore, the inner wall of one end of the first sieving barrel, which is far away from the first opening, is spherical and is provided with a sieving hole, and the circle center of the corresponding spherical surface is positioned at one side of the first sieving barrel, which is close to the first opening.

Furthermore, the inner wall of one end of the second screen cylinder, which is far away from the first opening, is spherical and is provided with screen holes, and the circle center of the corresponding spherical surface is positioned on one side of the spherical surface, which is close to the first opening.

Furthermore, first opening, second opening and third opening all are circular, and the diameter of first opening equals with the internal diameter of jar body, and the diameter of second opening equals with the internal diameter of first minute sieve section of thick bamboo, and the diameter of third opening equals with the internal diameter of second minute sieve section of thick bamboo.

Further, the first opening has a closing plate for closing the opening, the closing plate being arranged perpendicular to the central axis of the can body. The second sub-sieve cylinder penetrates through the sealing plate and is rotatably matched with the sealing plate. The closing plate has been seted up the slag hole, and the slag hole is located the bottom of closing plate and is formed along radial sunken by the edge of closing plate to with second opening and outside intercommunication. The slag discharge hole is in a fan ring shape, and the corresponding central angle degree is 90-110 degrees.

Furthermore, a plurality of rollers are arranged on the inner wall of the tank body, the rollers are uniformly arranged along the circumferential direction of the tank body at intervals, and the rotating axis of each roller is parallel to the central axis of the tank body. The outer wall of the first screening drum is attached to the roller.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a filter equipment utilizes the servo motor drive jar body to rotate when carrying out sewage treatment, makes the one end at the first opening place of the jar body be higher than it and keeps away from first open-ended one end. At this time, sewage is injected into the second sieving cylinder through the third opening, and the first sieving cylinder and the second sieving cylinder are driven by the driving motor. After the sewage enters the second screening drum, the sewage is screened by the second screening drum, solid garbage with larger volume is filtered out by the second screening drum, and liquid and solid garbage with smaller volume enter the first screening drum. Because the less solid rubbish of volume often adsorbs liquid more easily, when it got into first minute sieve section of thick bamboo, because the rotation opposite direction of first minute sieve section of thick bamboo and second minute sieve section of thick bamboo, had certain striking effect between the less solid rubbish of volume and the first minute sieve section of thick bamboo, helped the liquid in the small solid rubbish of volume to be extruded to make solid-liquid separation more abundant.

After screening through a first branch sieve section of thick bamboo and a second branch sieve section of thick bamboo, solid rubbish is sieved out, and the liquid phase then gets into the jar body and finally discharges through the drain pipe, can directly communicate the continuous collection in order to realize sewage with the sewage collection vehicle with the drain pipe, and avoid sewage unrestrained.

When a certain amount of solid garbage is accumulated in the first screening drum and the second screening drum, the continuous sewage feeding into the second screening drum is stopped, the servo motor is utilized to drive the tank body to rotate, one end of the tank body where the first opening is located is lower than the other end of the tank body, at the moment, the driving motor is utilized to continuously drive the first screening drum and the second screening drum to rotate, and the solid garbage in the first screening drum and the second screening drum is promoted to fall out from the second opening and the third opening through the first opening. The garbage truck can be directly parked at the first opening or the solid garbage collection box can be placed at the first opening so as to realize the continuous collection of the solid garbage.

Generally, the embodiment of the utility model provides a filter equipment can realize the primary separation of sewage, accomplishes the categorised collection of solid waste and sewage to improve and classify transportation efficiency, improved the treatment effeciency in the sewage collection stage greatly. The device is convenient to use, is suitable for collecting and treating dispersed sewage such as scenic area sewage, rural sewage and the like, is convenient to operate, and is convenient to clean and maintain.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a filtering apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view showing the internal structure of the filter device of FIG. 1;

FIG. 3 is a schematic view of the filter apparatus of FIG. 1 from another perspective;

FIG. 4 is a schematic view of another operating condition of the filter apparatus of FIG. 1;

fig. 5 is a schematic view of the engagement between the drive shaft and the sleeve of the filter device of fig. 1.

Icon: a filter device 1000; a base 100; a column 110; a can body 200; a first opening 210; a drain pipe 220; a first classifying drum 300; a second opening 310; a second classifying drum 400; a third opening 410; a servo motor 510; a drive motor 520; a drive shaft 530; an outer ring gear 531; a shaft sleeve 540; an inner gear ring 541; a reinforcing beam 550; a closing plate 560; a slag discharge hole 561; a roller 570; and a planetary gear 580.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 to 3, the present embodiment provides a filtering apparatus 1000 suitable for sewage treatment. The filter device 1000 includes: base 100, upright 110, tank 200, first sifting cylinder 300 and second sifting cylinder 400.

The upright post 110 is arranged on the base 100, the tank 200 is rotatably connected to the upright post 110 and driven by the servo motor 510, and the rotation axis of the tank 200 is horizontally arranged and perpendicular to the central axis thereof. One end of the can 200 has a first opening 210 for communicating the inner cavity thereof with the outside, and one end of the can 200, which is away from the first opening 210, has a drain pipe 220 communicating with the inner cavity thereof.

The first sifting cylinder 300 is rotatably disposed in the inner cavity of the tank 200, and the second sifting cylinder 400 is rotatably disposed in the inner cavity of the first sifting cylinder 300. The first screening drum 300, the second screening drum 400 and the tank body 200 are coaxially arranged, and the rotation axes of the first screening drum 300 and the second screening drum 400 are coincided with the central axis of the tank body 200. The end of the first sieving drum 300 near the first opening 210 has a second opening 310 for communicating its inner cavity with the outside, and the end of the second sieving drum 400 near the first opening 210 has a third opening 410 for communicating its inner cavity with the outside.

The first and

second sifter cylinders

300 and 400 are driven by the driving motor 520 and rotate in opposite directions. Both the side walls of the first sieving barrel 300 and the second sieving barrel 400 are provided with sieve holes, and the sieve hole diameter of the first sieving barrel 300 is smaller than that of the second sieving barrel 400.

When sewage treatment is performed, the servo motor 510 is used to drive the tank 200 to rotate, so that the end of the tank 200 where the first opening 210 is located is higher than the end far away from the first opening 210, as shown in fig. 1. At this time, the sewage is injected into the second sieve drum 400 through the third opening 410, and the first sieve drum 300 and the second sieve drum 400 are driven by the driving motor 520. After entering the second screen drum 400, the sewage is screened by the second screen drum 400, solid garbage with larger volume is filtered out by the second screen drum 400, and liquid and solid garbage with smaller volume enter the first screen drum 300. Because the less solid waste of volume often adsorbs liquid more easily, when it got into first branch sieve section of thick bamboo 300, because the rotation direction of first branch sieve section of thick bamboo 300 and second branch sieve section of thick bamboo 400 is opposite, had certain striking effect between the less solid waste of volume and the first branch sieve section of thick bamboo 300, helped the liquid in the small solid waste of volume to be extruded to make solid-liquid separation more abundant.

After being sieved by the first sieving barrel 300 and the second sieving barrel 400, the solid garbage is sieved out, while the liquid phase enters the tank body 200 and is finally discharged through the drain pipe 220, so that the drain pipe 220 can be directly communicated with a sewage collecting vehicle to realize continuous collection of sewage, and the sewage is prevented from being spilled.

When a certain amount of solid waste is accumulated in the first sieving drum 300 and the second sieving drum 400, the continuous introduction of the sewage into the second sieving drum 400 is stopped, and the servo motor 510 is used to drive the tank 200 to rotate, so that the end of the first opening 210 of the tank 200 is lower than the other end, as shown in fig. 4. At this time, the solid garbage in the first and second sieve drums 300 and 400 is promoted to fall out from the second and

third openings

310 and 410 through the first opening 210 by continuously driving the first and second sieve drums 300 and 400 to rotate by the driving motor 520. A garbage truck may be directly parked or a solid garbage collection bin may be placed at the first opening 210 to enable continuous collection of solid garbage.

Generally, the filtering device 1000 can realize the primary separation of sewage and complete the classified collection of solid garbage and sewage, thereby improving the classification and transportation efficiency and greatly improving the treatment efficiency in the sewage collection stage. The device is convenient to use, is suitable for collecting and treating dispersed sewage such as scenic area sewage, rural sewage and the like, is convenient to operate, and is convenient to clean and maintain.

In this embodiment, the tank 200, the first sifting cylinder 300 and the second sifting cylinder 400 are all cylindrical. The inner wall of the end of the tank 200 far from the first opening 210 is spherical, and the center of the corresponding spherical surface is located at the side close to the first opening 210. The end of the first sieving drum 300 away from the second opening 310 is conical. The end of the second sifting cylinder 400 far from the third opening 410 is hemispherical. By the design, the solid garbage can be discharged more conveniently.

The drain pipe 220 is located at the junction of the spherical wall and the cylindrical side wall of the tank 200 at the end far away from the first opening 210. The inner wall of the first sieving barrel 300 far away from the first opening 210 is spherical and is provided with a sieve hole, and the center of the corresponding spherical surface is located at one side close to the first opening 210. The inner wall of the second sifting cylinder 400 at the end far away from the first opening 210 is spherical and is provided with sifting holes, and the circle center of the corresponding spherical surface is located at the side close to the first opening 210. The filtering effect of design to solid rubbish is also better like this, can also prevent that jar body 200, first branch sieve section of thick bamboo 300 and second branch sieve section of thick bamboo 400 from producing ponding when the branch sieve sewage.

Further, the filter device 1000 further includes a driving shaft 530, and the driving shaft 530 is disposed along a central axis of the can 200. The driving shaft 530 penetrates through an end of both the tank 200 and the first sieving drum 300 away from the first opening 210 and is connected with an end of the second sieving drum 400 away from the first opening 210. The driving shaft 530 is in transmission connection with the first sieving drum 300 through a planetary gear 580, and the driving shaft 530 is in transmission connection with the driving motor 520. With this design, the driving shaft 530 can provide a supporting force for the first and second sieving

drums

300 and 400 on the one hand, and can improve the rotational stability of both the first and second sieving

drums

300 and 400. On the other hand, due to the speed reduction effect of the planetary gear 580, the rotation speed of the first sieving drum 300 is lower than that of the second sieving drum 400, so that the impact effect between the solid garbage with small volume entering the first sieving drum 300 and the first sieving drum 300 can be further improved, and the filtering capability of the sewage can be further improved.

Specifically, referring to fig. 2 and 5, the driving shaft 530 has an outer gear ring 531, the driving shaft 530 further has a shaft sleeve 540, the shaft sleeve 540 has an inner gear ring 541, the planetary gear 580 is located between the outer gear ring 531 and the shaft sleeve 540 and is engaged with the outer gear ring 531 and the shaft sleeve 540 at the same time, and the first classifying screen 300 is fixedly connected with the shaft sleeve 540. The driving shaft 530 is further engaged with a reinforcing beam 550, the reinforcing beam 550 is disposed along a radial direction of the tank 200 and both ends of the reinforcing beam 550 are connected to the inner wall of the tank 200, the reinforcing beam 550 is disposed on a side of the first sieving cylinder 300 away from the first opening 210, and the driving shaft 530 penetrates the reinforcing beam 550 and is rotatably engaged with the reinforcing beam 550. Each set of planet gears 580 comprises one gear, and the rotational shafts of the planet gears 580 are connected to the reinforcing beam 550.

Through the design, the operation stability of the driving shaft 530 is further improved, the speed reduction of the planetary gear 580 is not too obvious, and the influence on the screening effect due to the too low speed of the first screening cylinder 300 is avoided.

In this embodiment, the driving motor 520 is disposed on the outer wall of the tank 200 and located on the top of the tank 200, and the driving motor 520 and the driving shaft 530 are connected by a synchronous belt.

The first opening 210, the second opening 310 and the third opening 410 are all circular, the diameter of the first opening 210 is equal to the inner diameter of the tank body 200, the diameter of the second opening 310 is equal to the inner diameter of the first sieving drum 300, and the diameter of the third opening 410 is equal to the inner diameter of the second sieving drum 400.

The first opening 210 has a closing plate 560 for closing the opening, and the closing plate 560 is disposed perpendicular to the central axis of the can 200. The second sifter cylinder 400 extends through the cover plate 560 and is rotatably coupled to the cover plate 560. The sealing plate 560 is opened with a slag discharge hole 561, and the slag discharge hole 561 is located at the bottom of the sealing plate 560 and is formed by radially recessing the edge of the sealing plate 560 to communicate the second opening 310 with the outside. The slag discharge holes 561 are fan-shaped and the corresponding central angle is 90-110 degrees. In the present embodiment, the central angle of the slag discharge hole 561 corresponds to 100 °.

Through the above design, the sealing plate 560 not only can play a stabilizing role in the second screening drum 400, but also reserves a sufficient space (slag discharge hole 561) for the discharge of solid garbage, and can also avoid sewage splashing in the process of screening sewage.

The inner wall of the can body 200 is provided with a plurality of rollers 570, the rollers 570 are uniformly arranged along the circumferential direction of the can body 200 at intervals, and the rotation axis line of the rollers 570 is parallel to the central axis line of the can body 200. The outer wall of the first sieving cylinder 300 is attached to the roller 570. Through this design, gyro wheel 570 can play the stabilizing action to first minute screen section of thick bamboo 300 to make the rotation of first minute screen section of thick bamboo 300 more smooth and easy.

Through a series of improvements, the stability of the first screening drum 300 and the second screening drum 400 is obviously improved, and the use stability is guaranteed.

In conclusion, the filtering device 1000 can realize the primary separation of sewage and complete the classified collection of solid garbage and sewage, thereby improving the classified transportation efficiency and greatly improving the treatment efficiency in the sewage collection stage. The device is convenient to use, is suitable for collecting and treating dispersed sewage such as scenic area sewage, rural sewage and the like, is convenient to operate, and is convenient to clean and maintain.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter device suitable for sewage treatment, comprising: the device comprises a base, a stand column, a tank body, a first classifying screen cylinder and a second classifying screen cylinder;

the upright post is arranged on the base, the tank body is rotatably connected to the upright post and driven by a servo motor, and the rotating axis of the tank body is perpendicular to the central axis of the tank body;

one end of the tank body is provided with a first opening for communicating the inner cavity of the tank body with the outside, and one end of the tank body, which is far away from the first opening, is provided with a drain pipe communicated with the inner cavity of the tank body; the first classifying screen drum is rotatably arranged in the inner cavity of the tank body, and the second classifying screen drum is rotatably arranged in the inner cavity of the first classifying screen drum; the first screening cylinder, the second screening cylinder and the tank body are coaxially arranged, and the rotating shaft axes of the first screening cylinder and the second screening cylinder are coincided with the central axis of the tank body; one end of the first screening drum, which is close to the first opening, is provided with a second opening for communicating the inner cavity of the first screening drum with the outside, and one end of the second screening drum, which is close to the first opening, is provided with a third opening for communicating the inner cavity of the second screening drum with the outside;

the first screening drum and the second screening drum are driven by a driving motor and have opposite rotating directions; the sieve mesh has all been seted up to the lateral wall of first branch sieve section of thick bamboo with the second branch sieve section of thick bamboo both, just the sieve mesh aperture of first branch sieve section of thick bamboo is less than the sieve mesh aperture of second branch sieve section of thick bamboo.

2. The filtration apparatus of claim 1, further comprising a drive shaft disposed along a central axis of the tank; the driving shaft penetrates through the end parts, far away from the first opening, of the tank body and the first screening drum and is connected with the end part, far away from the first opening, of the second screening drum; the driving shaft is in transmission connection with the first sieving drum through a planetary gear, and the driving shaft is in transmission connection with the driving motor.

3. The filter device according to claim 2, wherein the drive shaft has an outer gear ring, the drive shaft further engages with a bushing, the bushing has an inner gear ring, the planetary gear is located between the outer gear ring and the bushing and simultaneously engages with the outer gear ring and the bushing, and the first classifying screen cylinder is fixedly connected with the bushing; the driving shaft is also matched with a reinforcing beam, the reinforcing beam is arranged along the radial direction of the tank body, two ends of the reinforcing beam are connected to the inner wall of the tank body, the reinforcing beam is positioned on one side, away from the first opening, of the first sieving barrel, and the driving shaft penetrates through the reinforcing beam and is rotatably matched with the reinforcing beam; the rotating shaft of the planetary gear is connected to the reinforcing beam.

4. The filtering device as claimed in claim 2, wherein the driving motor is disposed on the outer wall of the tank body and on the top of the tank body, and the driving motor and the driving shaft are connected by a synchronous belt.

5. The filtering device as claimed in claim 1, wherein an inner wall of an end of the tank body away from the first opening is spherical, and a center of the corresponding spherical surface is located at a side of the tank body close to the first opening.

6. The filtering device as claimed in claim 1, wherein an inner wall of an end of the first sieving cylinder away from the first opening is spherical and is provided with the sieving hole, and a center of the corresponding spherical surface is located on a side of the spherical surface close to the first opening.

7. The filtering device as claimed in claim 1, wherein the inner wall of the second screen cylinder at an end thereof away from the first opening is spherical and is provided with the screen hole, and the center of the corresponding spherical surface is located at a side thereof close to the first opening.

8. The filtration device of claim 1, wherein the first opening, the second opening, and the third opening are circular, the first opening having a diameter equal to an inner diameter of the tank, the second opening having a diameter equal to an inner diameter of the first sifter cylinder, and the third opening having a diameter equal to an inner diameter of the second sifter cylinder.

9. The filter apparatus of claim 8, wherein the first opening has a sealing plate for closing the first opening, the sealing plate being disposed perpendicular to a central axis of the canister; the second sieving cylinder penetrates through the sealing plate and is rotatably matched with the sealing plate; the sealing plate is provided with a slag discharge hole, and the slag discharge hole is positioned at the bottom of the sealing plate and is formed by radially sinking the edge of the sealing plate so as to communicate the second opening with the outside; the slag discharge holes are in a fan ring shape, and the corresponding central angle degree is 90-110 degrees.

10. The filtering device as claimed in claim 8, wherein the inner wall of the tank body is provided with a plurality of rollers, the rollers are uniformly arranged at intervals along the circumferential direction of the tank body, and the rotating axes of the rollers are parallel to the central axis of the tank body; the outer wall of the first screening drum is attached to the roller.