CN220968353U - Filtering and impurity removing device for fine carbon nine raw materials - Google Patents

Abstract

The utility model relates to the field of carbon nine raw material impurity removal devices, in particular to a fine carbon nine raw material filtering impurity removal device, which solves the technical problems: the fine carbon nine raw materials are large in viscosity and poor in fluidity, the common physical filtration impurity removal efficiency is low, and a large amount of raw material residues are wasted, so that the technical scheme is as follows: the utility model relates to a filtering impurity-removing device for fine carbon nine raw materials, which comprises a filtering tank, a supporting ring fixedly connected to the outer wall of the filtering tank, a carbon nine raw material conveying pipe, a supporting mechanism, a pressure pumping mechanism, an intermediate layer module, an equipment cooling mechanism, a filtering component and a raw material cooling mechanism.

Description

Filtering and impurity removing device for fine carbon nine raw materials

Technical Field

The utility model relates to the field of carbon nine raw material impurity removing devices, in particular to a fine carbon nine raw material filtering impurity removing device.

Background

The fine carbon nine raw material is mostly prepared in the form of aromatic hydrocarbon, is colorless liquid at normal temperature, has certain viscosity, is an important organic chemical raw material, is often used as a gasoline additive and an industrial solvent, has higher industrial application value, is a semi-finished product subjected to further deep processing, such as carbon nine petroleum resin and the like, and needs to filter and remove a small amount of insoluble impurities contained in the fine carbon nine raw material before the deep processing, or can be subjected to chemical combination reaction with the carbon nine raw material in the processing process to generate toxic and harmful gas or other compounds affecting the quality of the carbon nine product

At present, a filtering and impurity removing device for the carbon nine raw materials generally introduces materials into a filter screen or a filter cylinder with a fine pore structure through feeding equipment of the carbon nine raw materials, and simple physical filtration is carried out through the fluidity and trafficability of carbon nine liquid, but the fine carbon nine raw materials have certain viscosity, the fluidity of the fine carbon nine raw materials is poor due to the viscosity of the materials, the speed of the fine carbon nine raw materials passing through the filter cylinder or the filter screen is low, in addition, the condition of hanging the filter screen exists in the impurity removing process, and a large amount of carbon nine raw materials remain on the filter cylinder or the filter screen to waste raw materials.

Therefore, aiming at the situation that the fine carbon nine raw materials have lower impurity removing efficiency by using common physical filtration due to the viscosity and poor fluidity of the fine carbon nine raw materials, and a great amount of raw materials remain on a filtering structure and waste of materials occurs, the filtering impurity removing device capable of accelerating fine carbon nine filtration and reducing the residual waste of filtering materials can be designed.

Disclosure of utility model

In order to solve the problems that the fine carbon nine raw materials are large in viscosity and poor in fluidity, the common physical filtration and impurity removal efficiency is low, and a large amount of raw materials are left to waste.

The technical scheme of the utility model is as follows: a filtering and impurity removing device for fine carbon nine raw materials comprises a filtering tank, a supporting ring fixedly connected to the outer wall of the filtering tank, a carbon nine raw material conveying pipe, a supporting mechanism, a pressure pumping mechanism, an intermediate layer module, an equipment cooling mechanism, a filtering component and a raw material cooling mechanism; the carbon nine raw material conveying pipe is connected between the top of the filter tank and the carbon nine raw material storage equipment, the support mechanism is sleeved on the outer side of the filter tank, the pressure pumping mechanism is arranged on the carbon nine raw material conveying pipe to carry out secondary pressurization on feeding of the carbon nine raw material, an intermediate layer module is arranged in the filter tank, the equipment cooling mechanism for cooling the pressure pumping mechanism in an air-cooling mode is arranged at the upper end of the support mechanism, the filter assembly is arranged in the intermediate layer module, and the raw material cooling mechanism for cooling the carbon nine raw material in an air-cooling mode is arranged at the bottom of the filter tank.

Preferably, the pressure pumping mechanism can pressurize the filtering conveying path of the carbon nine raw materials, the flow speed and the trafficability of the pressure pumping mechanism are improved, the filtering efficiency is further improved, the filtering assembly carries out centrifugal swing type filtering on the carbon nine raw materials, the carbon nine raw materials which are adhered and remained on the filtering assembly can be thrown out when the filtering effect is improved, the waste of the raw materials is reduced, the equipment cooling mechanism can cool the pressure pumping mechanism in an air cooling manner, the operating pressure of the equipment is relieved, the raw material cooling mechanism cools the filtered carbon nine raw materials, and toxic and harmful gas generated by discharging at the belt temperature due to the heat transfer effect of the equipment operation is avoided.

Preferably, the supporting mechanism comprises a retaining ring, a supporting table and a bracket; the retaining ring is semicircular and provided with two groups, the retaining rings are connected and arranged on the retaining ring through bolt anchoring, a supporting table is fixedly connected to the retaining ring on one side, a support is arranged at the upper end of the supporting table, the supporting mechanism is used as a supporting platform of the pressure pumping mechanism and the equipment cooling mechanism, the operation stability of the pressure pumping mechanism and the equipment cooling mechanism is guaranteed, and the retaining ring and the filtering tank are assembled and assembled through the retaining ring and the filtering tank, so that the retaining ring can be freely assembled and disassembled, and the use is flexible.

Preferably, the pressure pumping mechanism is an inert gas booster pump, a pumping pipe of the pressure pumping mechanism is communicated with the carbon nine raw material conveying pipe, a support top end structure is matched with the pressure pumping mechanism and is supported below the pressure pumping mechanism, the pressure pumping mechanism continuously pumps inert gas into the carbon nine raw material conveying pipe, continuous conveying of the carbon nine raw material is accelerated in a secondary pressurizing mode, the trafficability of the carbon nine raw material during filtering is enhanced, and the inert gas is in contact with the carbon nine raw material and does not undergo chemical reaction, so that the carbon nine raw material filtering device is safer to use.

Preferably, the middle layer module comprises a sliding cylinder, a discharge hole and a balance frame; the sliding charging barrel is of a cylindrical structure with a funnel-shaped inner wall, an insulating layer and a sound insulation layer are arranged between the outer wall of the sliding charging barrel and the inner wall of the filtering tank, a discharge hole communicated with the bottom of the filtering tank is formed in the lower end of the sliding charging barrel, a balancing stand penetrating through the sliding charging barrel is fixedly arranged on the inner wall of the filtering tank, carbon nine raw materials thrown outwards through the filtering assembly are knocked on the funnel-shaped inner wall of the sliding charging barrel under the action of centrifugal force, and the carbon nine raw materials continue to flow downwards along the inner wall to be discharged, so that the adhesion and the material loss condition of the carbon nine raw materials to the filtering assembly are reduced.

Preferably, the equipment cooling mechanism comprises a first fan, a fan housing and a fan nozzle; the fan is installed in the saddle upper end, installs the fan housing between fan and the support, installs on the support with the fan housing intercommunication and upwards bloies the tuyere, fan is last to the casing of pressure pumping mechanism through the tuyere and bloies, reduces the operating temperature of pressure pumping mechanism, makes its operation safer, also reduces the possibility that pressure pumping mechanism will heat transfer for nine raw materials of carbon simultaneously.

Preferably, the filter assembly comprises a filter cylinder, a sliding table, a driving motor, a shaft sleeve and a shaft head sleeve cover; the filter cylinder is of a metal net cylinder structure with compact holes on the side wall, a sliding table with the top surface being of an upward bulge structure is fixedly arranged at the lower end of the filter cylinder, a driving motor is installed at the lower end of the balance frame, a transmission shaft of the driving motor penetrates through the balance frame and is fixedly connected with the sliding table, a shaft sleeve is installed on the inner wall of the top end of the filter cylinder, a shaft head cover which is rotationally connected in the shaft sleeve is installed at the upper end of the filter cylinder, the shaft head cover is communicated with a carbon nine raw material conveying pipe, the driving motor drives the filter cylinder to rotate at a high speed, one part of carbon nine raw materials entering the filter cylinder directly leaks out of the meshes of the filter cylinder through the action of gravity, the other part of the carbon nine raw materials are discharged outwards from the filter cylinder through centrifugal force in a swing accelerating mode, and the shaft head cover at the top is rotationally connected with the shaft sleeve through the top when the filter cylinder rotates, and the stability of the top of the filter cylinder is improved.

Preferably, the raw material cooling mechanism comprises a second fan, an air ring, an air pipe and an air outlet; the second fan is installed on the lateral wall of the bottom end of the filtering tank, the air ring is of a hollow structure and is fixedly connected to the lower end of the sliding cylinder, an air pipe penetrating through the lateral wall of the filtering tank and connected with the outer wall of the air ring is installed on the second fan, a plurality of air outlets are distributed on the inner wall of the air ring, the second fan blows air into the air ring through the air pipe, the air is blown out of the nine carbon raw materials exhausted from the discharge port evenly through the air outlets, the surface temperature of the raw materials is reduced, and the situation that the raw materials leave the filtering tank with temperature is avoided.

The utility model has the beneficial effects that:

1. The filtering conveying path of the carbon nine raw materials can be pressurized through the pressure pumping mechanism arranged on the filtering tank, the flow speed and the trafficability of the filtering conveying path are improved, the filtering efficiency is further improved, the rotatable filtering assembly is matched, the carbon nine raw materials can be centrifugally and whipped for filtering, the carbon nine raw materials which are adhered and remained on the filtering assembly can be thrown out while the filtering effect is improved, the waste of the raw materials is reduced, the pressure pumping mechanism and the filtered carbon nine raw materials can be cooled through the equipment cooling mechanism and the raw material cooling mechanism, the operation pressure of the equipment is relieved, and meanwhile, the carbon nine raw materials are prevented from generating toxic and harmful gas due to the heat transfer effect of the equipment operation and the discharge with temperature;

2. The insulating layer and the sound insulation layer between the middle layer module and the filter tank can effectively prevent the carbon nine raw materials from being influenced by the ambient temperature in the filtering process, prevent the carbon nine raw materials from being heated to generate toxic and harmful gas or from causing poor fluidity due to the influence of low temperature, and simultaneously reduce the outward diffusion of noise when internal equipment is operated.

Drawings

FIG. 1 shows a schematic diagram of a first perspective construction of a fine carbon nine raw material filtering and impurity removing device according to the present utility model;

FIG. 2 shows a second perspective view of a fine carbon nine raw material filtering and impurity removing device according to the present utility model;

FIG. 3 shows a schematic view of a first perspective construction of the interior of a filter tank of the fine carbon nine-material filtering and impurity removing device of the present utility model;

FIG. 4 shows a schematic perspective view of a supporting mechanism of a filtering and impurity removing device and a cooling mechanism of equipment for fine carbon nine raw materials according to the utility model;

FIG. 5 shows a schematic perspective view of a filter assembly of the fine carbon nine raw material filtering and impurity removing device according to the present utility model;

FIG. 6 shows a schematic view of a second perspective construction of the interior of the filter tank of the fine carbon nine-material filtering and impurity removing device of the present utility model.

Reference numerals illustrate: 1. a filter tank; 2. a backing ring; 3. a carbon nine raw material conveying pipe; 4. a support mechanism; 5. a pressure pumping mechanism; 6. an intermediate layer module; 7. a device cooling mechanism; 8. a filter assembly; 9. a raw material cooling mechanism; 401. a clasp ring; 402. a support; 403. a bracket; 601. a sliding cylinder; 602. a discharge port; 603. a balancing stand; 701. a first fan; 702. a fan housing; 703. a tuyere; 801. a filter cartridge; 802. a sliding table; 803. a driving motor; 804. a shaft sleeve; 805. a shaft head cover; 901. a second fan; 902. a wind ring; 903. an air duct; 904. and an air outlet.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Referring to fig. 1-3, the present utility model provides an embodiment: the fine carbon nine raw material filtering and impurity removing device comprises a filtering tank 1, a supporting ring 2 fixedly connected to the outer wall of the filtering tank 1, a carbon nine raw material conveying pipe 3, a supporting mechanism 4, a pressure pumping mechanism 5, an intermediate layer module 6, an equipment cooling mechanism 7, a filtering component 8 and a raw material cooling mechanism 9; the carbon nine raw material conveying pipe 3 is connected between the top of the filter tank 1 and the carbon nine raw material storage equipment, the support mechanism 4 is sleeved on the outer side of the filter tank 1, the pressure pumping mechanism 5 is arranged on the carbon nine raw material conveying pipe 3 to carry out secondary pressurization on feeding of the carbon nine raw material, the middle layer module 6 is arranged in the filter tank 1, the equipment cooling mechanism 7 for cooling the pressure pumping mechanism 5 in an air manner is arranged at the upper end of the support mechanism 4, the filter assembly 8 is arranged in the middle layer module 6, the raw material cooling mechanism 9 for cooling the carbon nine raw material in an air manner is arranged at the bottom of the filter tank 1, the pressure pumping mechanism 5 can pressurize a filter conveying path of the carbon nine raw material, the flow speed and the trafficability of the filter assembly are improved, the filter assembly 8 can carry out centrifugal throwing filtration on the carbon nine raw material, the filter assembly 8 can be used for throwing away the carbon nine raw material adhered on the filter assembly 8 while the filter effect is improved, the equipment cooling mechanism 7 can cool the pressure pumping mechanism 5 in an air manner, the running pressure of the equipment is relieved, the raw material cooling mechanism 9 is cooled down the filtered carbon nine raw material, and the carbon nine raw material is also prevented from being subjected to toxic and harmful gas generation due to the running of the equipment.

Referring to fig. 1 and 4, in the present embodiment, the supporting mechanism 4 includes a buckle 401, a stand 402, and a bracket 403; the retaining rings 401 are semicircular and are provided with two groups, the retaining rings 401 are connected and arranged on the supporting ring 2 through bolt anchoring, a supporting table 402 is fixedly connected to the retaining ring 401 on one side, a support 403 is arranged at the upper end of the supporting table 402, the pressure pumping mechanism 5 is an inert gas booster pump, a pumping pipe of the pressure pumping mechanism 5 is communicated with the carbon nine raw material conveying pipe 3, the top end structure of the support 403 is matched with the pressure pumping mechanism 5 and is supported below the pressure pumping mechanism 5, and the equipment cooling mechanism 7 comprises a first fan 701, a fan housing 702 and a wind nozzle 703; the fan 701 is arranged at the upper end of the supporting platform 402, the fan housing 702 is arranged between the fan 701 and the bracket 403, the fan nozzle 703 which is communicated with the fan housing 702 and blows upwards is arranged on the bracket 403, the supporting mechanism 4 is used as a supporting platform of the pressure pumping mechanism 5 and the equipment cooling mechanism 7, guarantees the operation stability of the pressure pumping mechanism 5 and the equipment cooling mechanism 7, and can be freely assembled and disassembled through the combined assembly structure of the retaining ring 401 and the filter tank 1, the fan housing is flexible in use, the pressure pumping mechanism 5 continuously pumps inert gas into the carbon nine raw material conveying pipe 3, the continuous conveying of the carbon nine raw material is accelerated in a secondary pressurizing mode, the passing property of the carbon nine raw material during filtering is enhanced, the inert gas is not in contact with the carbon nine raw material, the fan housing is safer in use, the fan housing of the fan 701 continuously blows to the pressure pumping mechanism 5 through the fan nozzle 703, the operation temperature of the pressure pumping mechanism 5 is reduced, the operation of the fan housing is safer, and the possibility of transmitting heat to the carbon nine raw material by the pressure pumping mechanism 5 is reduced.

Referring to fig. 3-6, in the present embodiment, the middle layer module 6 includes a slide cylinder 601, a discharge port 602, and a balance frame 603; the sliding material cylinder 601 is of a cylindrical structure with a funnel-shaped inner wall, an insulation layer and a sound insulation layer are arranged between the outer wall of the sliding material cylinder 601 and the inner wall of the filtering tank 1, a discharge hole 602 communicated with the bottom of the filtering tank 1 is arranged at the lower end of the sliding material cylinder 601, a balance frame 603 penetrating through the sliding material cylinder 601 is fixedly arranged on the inner wall of the filtering tank 1, and the filtering component 8 comprises a filter cylinder 801, a sliding table 802, a driving motor 803, a shaft sleeve 804 and a shaft head sleeve cover 805; the filter cartridge 801 is of a metal net drum structure with compact holes on the side wall, a sliding table 802 with an upward bulge structure on the top surface is fixedly arranged at the lower end of the filter cartridge 801, a driving motor 803 is arranged at the lower end of a balance frame 603, a transmission shaft of the driving motor 803 penetrates through the balance frame 603 and is fixedly connected with the sliding table 802, a shaft sleeve 804 is arranged on the inner wall of the top end of the filter tank 1, a shaft head sleeve cover 805 which is rotatably connected in the shaft sleeve 804 is arranged at the upper end of the filter cartridge 801, the shaft head sleeve cover 805 is communicated with a carbon nine raw material conveying pipe 3, and the raw material cooling mechanism 9 comprises a second fan 901, a wind ring 902, a wind pipe 903 and an air outlet 904; the second fan 901 is arranged on the side wall of the bottom end of the filter tank 1, the air ring 902 is of a hollow structure and is fixedly connected to the lower end of the sliding material cylinder 601, the second fan 901 is provided with an air pipe 903 penetrating through the side wall of the filter tank 1 and connected with the outer wall of the air ring 902, a circle of air outlets 904 are arranged on the inner wall of the air ring 902, carbon nine raw materials thrown outwards through the filter assembly 8 are hit on the funnel-shaped inner wall of the sliding material cylinder 601 under the action of centrifugal force and continuously flow downwards along the inner wall to be discharged, adhesion of the carbon nine raw materials to the filter assembly 8 and mass loss of materials are reduced, the driving motor 803 drives the filter drum 801 to rotate at a high speed, one part of carbon nine raw materials entering the filter drum 801 directly leaks out of meshes of the filter drum 801 through the action of gravity, the other part of the carbon nine raw materials are accelerated to be discharged outwards from the filter drum 801 through centrifugal force, the shaft head cover 805 and the shaft sleeve 804 are rotationally connected with the shaft sleeve 804 at the top during rotation, the second fan 901 blows air into the air ring 902 through the air pipe 903, the circle of air outlets 904 uniformly to discharge the carbon nine raw materials from the discharge port 602, and the surface temperature of the carbon nine raw materials discharged from the discharge port 602 is reduced, and the surface temperature of the filter drum 1 is avoided.

During operation, fine carbon nine raw materials are conveyed to one end of the filter tank 1 through the carbon nine raw material conveying pipe 3, inert gas is continuously pumped into the carbon nine raw material conveying pipe 3 by the pressure pumping mechanism 5 in the conveying process, the continuous conveying capacity of the carbon nine raw materials is accelerated in a secondary pressurizing mode, the pressure pumping mechanism 5 is operated, meanwhile, the first fan 701 continuously blows air to the shell of the pressure pumping mechanism 5 through the air nozzle 703, and the operating temperature of the pressure pumping mechanism 5 is reduced;

Then, fine carbon nine raw materials enter the filter cartridge 801, and in a state that the filter cartridge 801 is driven by the driving motor 803 to rotate at a high speed, one part of the carbon nine raw materials directly leaks out of meshes of the filter cartridge 801 under the action of gravity, and the other part of the carbon nine raw materials are accelerated to be discharged from the inside of the filter cartridge 801 outwards through centrifugal force swing;

Immediately after that, all the carbon nine raw materials discharged from the filter cartridge 801 continuously flow downwards through the funnel-shaped inner wall of the sliding material cylinder 601, and finally are discharged from the discharge port 602, and at the moment of discharging, the second fan 901 blows air into the air ring 902 through the air pipe 903, and the air is uniformly blown to the discharged carbon nine raw materials by the air outlet 904, so that the surface temperature of the raw materials is reduced.

Through the above-mentioned step, can pressurize the filtration conveying path of nine raw materials of carbon through setting up the pressure pumping mechanism 5 on filtering jar 1, promote its velocity of flow and trafficability characteristic, further promote filtration efficiency, cooperation rotatable filter module 8 can carry out centrifugal whipping to nine raw materials of carbon and filter, when promoting the filter effect, can throw away nine raw materials of carbon that the adhesion remained on filter module 8, reduce the waste of raw materials, in order to solve meticulous nine raw materials of fine carbon viscidity big, mobility is poor, ordinary physical filtration impurity removal efficiency is lower, and can cause a large amount of raw materials to remain extravagant problem.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims (7)

1. The filtering and impurity removing device for the fine carbon nine raw materials comprises a filtering tank (1) and a supporting ring (2) fixedly connected to the outer wall of the filtering tank (1); the method is characterized in that: the device also comprises a carbon nine raw material conveying pipe (3), a supporting mechanism (4), a pressure pumping mechanism (5), an intermediate layer module (6), an equipment cooling mechanism (7), a filtering component (8) and a raw material cooling mechanism (9); the utility model provides a nine raw materials conveyer pipe of carbon (3) are connected between filtering jar (1) top and nine raw materials storage facilities of carbon, supporting mechanism (4) have been cup jointed in filtering jar (1) outside, install pressure pumping mechanism (5) on nine raw materials conveyer pipe of carbon (3) and carry out the secondary pressurization to the pay-off of nine raw materials of carbon, be provided with intermediate level module (6) in filtering jar (1), equipment cooling mechanism (7) to pressure pumping mechanism (5) forced air cooling are installed to supporting mechanism (4) upper end, be provided with filter component (8) in intermediate level module (6), raw materials cooling mechanism (9) to nine raw materials forced air cooling of carbon are installed to filtering jar (1) bottom.

2. The fine carbon nine raw material filtering and impurity removing device according to claim 1, wherein: the supporting mechanism (4) comprises a retaining ring (401), a supporting table (402) and a bracket (403); the retaining rings (401) are semicircular and are provided with two groups, the retaining rings (401) are connected through bolt anchors and are arranged on the supporting rings (2), a supporting table (402) is fixedly connected to one side of the retaining ring (401), and a bracket (403) is arranged at the upper end of the supporting table (402).

3. The fine carbon nine raw material filtering and impurity removing device according to claim 2, wherein: the pressure pumping mechanism (5) is an inert gas booster pump, a pump air pipe of the pressure pumping mechanism (5) is communicated with the carbon nine raw material conveying pipe (3), and a top end structure of the bracket (403) is matched with the pressure pumping mechanism (5) and is supported below the pressure pumping mechanism (5).

4. The fine carbon nine raw material filtering and impurity removing device according to claim 1, wherein: the middle layer module (6) comprises a sliding cylinder (601), a discharge hole (602) and a balancing frame (603); the sliding material cylinder (601) is of a cylindrical structure with a funnel-shaped inner wall, an insulation layer and an acoustic insulation layer are arranged between the outer wall of the sliding material cylinder (601) and the inner wall of the filtering tank (1), a discharge hole (602) communicated with the bottom of the filtering tank (1) is formed in the lower end of the sliding material cylinder (601), and a balancing frame (603) penetrating through the sliding material cylinder (601) is fixedly arranged on the inner wall of the filtering tank (1).

5. The fine carbon nine raw material filtering and impurity removing device according to claim 2, wherein: the equipment cooling mechanism (7) comprises a first fan (701), a fan housing (702) and a tuyere (703); a first fan (701) is arranged at the upper end of the supporting table (402), a fan housing (702) is arranged between the first fan (701) and the bracket (403), and a fan nozzle (703) communicated with the fan housing (702) and blowing upwards is arranged on the bracket (403).

6. The fine carbon nine raw material filtering and impurity removing device according to claim 4, wherein: the filter assembly (8) comprises a filter cylinder (801), a sliding table (802), a driving motor (803), a shaft sleeve (804) and a shaft head sleeve cover (805); the filter cartridge (801) is of a metal net drum structure with compact holes on the side wall, a sliding table (802) with a top surface of an upward bulge structure is fixedly arranged at the lower end of the filter cartridge (801), a driving motor (803) is arranged at the lower end of the balancing frame (603), a transmission shaft of the driving motor (803) penetrates through the balancing frame (603) and is fixedly connected with the sliding table (802), a shaft sleeve (804) is arranged on the inner wall of the top end of the filter tank (1), a shaft head sleeve cover (805) which is rotatably connected in the shaft sleeve (804) is arranged at the upper end of the filter cartridge (801), and the shaft head sleeve cover (805) is communicated with the carbon nine raw material conveying pipe (3).

7. The fine carbon nine raw material filtering and impurity removing device according to claim 4, wherein: the raw material cooling mechanism (9) comprises a second fan (901), an air ring (902), an air pipe (903) and an air outlet (904); the second fan (901) is arranged on the side wall of the bottom end of the filtering tank (1), the air ring (902) is of a hollow structure and is fixedly connected to the lower end of the sliding cylinder (601), an air pipe (903) penetrating through the side wall of the filtering tank (1) and connected with the outer wall of the air ring (902) is arranged on the second fan (901), and a plurality of air outlets (904) are distributed on the inner wall of the air ring (902).