CN110538512A - Filtration apparatus for aqueous dispersion of solid particles and filtration method thereof - Google Patents

Abstract

the invention relates to a filtering device and a filtering method for solid particle aqueous dispersion, the device comprises a tank body, a filtering unit and an oscillating unit, wherein the tank body comprises a top cover, a bottom cover and a side wall positioned between the bottom cover and the top cover, the tank body is provided with a feeding pipe, a discharging pipe, an air compressor, a pressure gauge and a liquid level meter, the filtering unit and the oscillating unit are positioned in the tank body, the oscillating unit is positioned below the filtering unit, a guide plate is arranged in the tank body between the filtering unit and the oscillating unit, and the guide plate is used for guiding the aqueous dispersion filtered out from the filtering unit into the oscillating unit. The filtering equipment breaks the large-particle aqueous dispersion by adopting stirring and grinding modes, and then removes impurities in the solid-particle aqueous dispersion by adopting filter ring filtering and oscillation filtering. The invention has the advantages of simple structure, simple and convenient operation, continuous production, high filtering efficiency, easy cleaning and the like.

Description

Filtration apparatus for aqueous dispersion of solid particles and filtration method thereof

Technical Field

The invention relates to filtering equipment, in particular to filtering equipment and a filtering method for solid particle aqueous dispersion, which are particularly suitable for filtering large particulate matters in the solid particle aqueous dispersion.

Background

in the production process of aqueous dispersions of solid particles such as aqueous color pastes, coal water slurries and the like, the production is usually carried out according to the procedures of feeding, dispersing, grinding, detecting, packaging and the like, impurities in raw materials, insufficiently dispersed raw materials and other large-particle substances can enter semi-finished products and finished products through various channels, and in order to further remove the large-particle substances and improve the fluidity of the aqueous dispersions, the products are usually required to be filtered in the production process. Generally, when the requirement on the filtering quality of the aqueous dispersion is not high, single-layer or multi-layer filter cloth can be selected for filtering, but under the condition of more large-particle substances, the filter cloth is easy to block by the filtering mode, the filter cloth needs to be frequently cleaned or replaced, the problems of poor filtering effect, large workload and the like are caused, and the filtering quality and efficiency are seriously influenced. How to filter the aqueous dispersion slurry by simple equipment and remove large-particle substances on a filter material in time is an important link in the production process of the aqueous dispersion slurry.

chinese patent with application number CN201810019026.9 discloses an efficient slurry raw material filtering device, which is characterized in that the motor drives the cam to rotate through the cooperation between the rotating shaft, the stirring blade, the motor, the cam and the filter plate, so that the support plate moves upwards, the elastic device extends, the stirring blade can stir the raw material, more raw materials can be placed at one time by the filtering device, and the possibility of raw material blockage is reduced. Although the device is not easy to block and has large treatment capacity, the device is inconvenient to clean and needs to be manually cleaned after being shut down. Chinese patent with application number cn201820681162.x discloses a water paint residue filter device, first filter screen and second filter screen are two and become about "V" type interval setting in the device, and the one end of two filter screens is passed through the spring and is connected with the backup pad, the other end passes staving lateral wall and fixedly connected with branch, the cylinder drives the swing of branch, this water paint residue filter device can drive first filter screen and the continuous oscillation swing of second filter screen, the solid particle of swing out is shaken and is collected in the filter residue box, filter residue box bottom surface is the filter screen, also can filter solid particle. The device can collect the filter residue, but the filter residue box is inside the device, needs regularly to take out the collection, otherwise can produce the filter residue box and block up, influences filtration efficiency. The filtration efficiency of the filtration equipment disclosed by the prior art is difficult to meet the requirement of industrial production.

Korean patent publication No. KR101622368 describes a water treatment apparatus having filtering and backwashing functions which can effectively clean the filtering apparatus without disassembling the filter housing, and german patent publication No. DE3905113 describes a method of cleaning the surface of the filter by using compressed air supplied through a slidable spray bar, and the filtering apparatus described in these two patents, although having an automatic cleaning function, tends to be difficult to continue to work because of high cleaning frequency and is complicated to perform and put a great pressure on maintenance of the apparatus in filtering an aqueous dispersion having a high content of large particles such as color paste, coal water slurry, etc. although the filtering apparatus disclosed in these two patents has an automatic cleaning function.

Disclosure of Invention

in order to overcome the defects, the invention provides the filtering equipment for the solid particle aqueous dispersion, which further crushes the large particle aqueous dispersion by adopting a stirring and grinding mode, removes impurities in the solid particle aqueous dispersion by adopting filter ring filtering and oscillation filtering, and has the advantages of simple structure, high automation degree, difficult blockage generation and high filtering efficiency.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a filtering device for solid particle aqueous dispersion comprises a tank body, a filtering unit and an oscillating unit, wherein the tank body comprises a top cover, a bottom cover and a side wall positioned between the bottom cover and the top cover, the tank body is provided with a feeding pipe and a discharging pipe, the filtering unit and the oscillating unit are positioned in the tank body, the oscillating unit is positioned below the filtering unit, a guide plate is arranged in the tank body between the filtering unit and the oscillating unit, and the guide plate is used for guiding the aqueous dispersion filtered out from the filtering unit into the oscillating unit;

The filter unit comprises a stirring shaft, blades, a filter ring and a solid plate, the filter ring is fixedly arranged in the tank body, the stirring shaft is positioned in the filter ring, the upper end of the stirring shaft is connected with an output shaft of a motor I in a positioning manner and is driven by the motor I to rotate, the lower end of the stirring shaft is fixedly provided with a plurality of blades, the included angle between each blade and the horizontal plane is an acute angle, a plurality of scraping blades are arranged below each blade along the length direction of the blade, the solid plate is fixedly arranged in the tank body below the filter ring, the lower end of the filter ring is tightly attached to the upper surface of the solid plate, an aqueous dispersion enters the filter ring through a feeding pipe and falls on the solid plate, and the scraping blades are used for grinding slurry;

the vibration unit comprises a vibration box, a second filter screen is arranged in the vibration box, the vibration box is divided into an upper layer and a lower layer by the second filter screen, two ends of the vibration box are connected with elastic elements, the lower end of the vibration box is connected with a second motor, the vibration box rotates and vibrates in the tank body under the combined action of the second motor and the elastic elements, and the filtered water-based dispersion is discharged out of the tank body from the vibration box through a discharge pipe.

preferably, the bottom cover and the side walls are integrally formed, and the top cover is detachably connected to the side walls.

Preferably, the filter ring comprises a first filter screen and a locking ring, the first filter screen is of a hollow cylinder structure with an upper opening and a lower opening, the upper end of the first filter screen is fixedly connected with the locking ring, the locking ring is provided with a plurality of round holes, the locking ring is detachably fixed on the top cover, the diameter of the mesh holes on the first filter screen is 1-5 mm, and the diameter of the first filter screen is smaller than the inner diameter of the tank body.

preferably, the (mixing) shaft is along the vertical setting of jar body central axis direction, the projected length of paddle on the horizontal plane is slightly less than the diameter of first filter screen, the contained angle of paddle and horizontal plane is for being less than or equal to 30, the doctor-bar sets up along whole paddle lower extreme length direction, and the part links to each other between the adjacent doctor-bar, is equipped with the clearance between the cutting edge of this doctor-bar and is equipped with a plurality of through-hole on the doctor-bar.

preferably, the solid plate includes that face and one end are connected a plurality of bracing pieces that set up at an interval each other on the face, and this bracing piece other end is fixed in the lateral wall of the jar body, the face is the regular cone form, and the contained angle of the generating line of this cone and horizontal plane equals the contained angle of paddle and horizontal plane.

preferably, the guide plate is obliquely arranged in the tank body between the filtering unit and the oscillating unit, the upper end of the guide plate is fixed on the side wall of the tank body, and the lower end of the guide plate is a free end and is positioned right above the oscillating box.

Preferably, the external diameter of vibration case is less than the internal diameter of the jar body, the second filter screen is wire mesh, and the external diameter of this second filter screen is the same with the internal diameter of vibration case, and the second filter screen is fixed in inside the vibration case through the buckle, the diameter of mesh is 0.1 ~ 1mm on the second filter screen, the bottom of vibration case is equipped with two at least gyro wheels, and this gyro wheel is arranged in jar body bottom cover and can be rolled wantonly on the bottom.

Preferably, the elastic element comprises a spring, a spring seat and an adjusting knob, the spring is arranged in the tank body, one end of the spring is connected with the inner side of the spring seat, the other end of the spring is connected with the outer side of the oscillating box, the spring seat is arranged outside the side wall of the tank body, and the adjusting knob is fixed on the outer side of the spring seat.

Preferably, be equipped with air compressor machine, pressure gauge and level gauge on the jar body, inlet pipe, motor one, pressure gauge and level gauge are arranged in on the top cap of the jar body, are equipped with the feeding control valve on this inlet pipe, the gas outlet of air compressor machine is connected in the jar internally, the discharging pipe passes the bottom of the jar body and communicates in the surge tank, be equipped with the ejection of compact control valve on the discharging pipe, motor two locates on the bottom of the jar body, feeding control valve, ejection of compact control valve, air compressor machine, pressure gauge, level gauge, motor one, adjust knob and motor two all are connected to PLC control system.

The present invention also provides a filtration method using a filtration apparatus for an aqueous dispersion of solid particles, comprising the steps of:

s1: the PLC control system is used for setting technological parameters of a feeding control valve, a discharging control valve, an air compressor, a pressure gauge, a liquid level meter, a first motor, an adjusting knob of an elastic element and a second motor;

S2: controlling the feeding flow of the solid particle aqueous dispersion through a feeding control valve, entering the tank body through a feeding pipe, and falling onto a solid plate; stirring the solid particle aqueous dispersion by a blade and grinding by a scraping blade, wherein large particles are smashed and then pass through a filtering ring, residual large particles cannot pass through the filtering ring, the residual large particles are left on a solid plate for continuous stirring and grinding, and impurities are blocked by the filtering ring; an air compressor is used for producing high pressure to ensure that the filter ring is not easy to block, a pressure gauge is used for monitoring the pressure in the tank body to prevent the pressure from being overhigh, a liquid level meter is used for monitoring the liquid level in the tank body and synchronously controlling the feeding flow, and thus the first filtering is completed;

S3: the solid particle aqueous dispersion passes through the filter ring, then enters the oscillation box through the guide plate, and the oscillation box rotationally oscillates on the horizontal plane under the combined action of the motor II and the elastic element, so that the solid particle aqueous dispersion is further refined; the solid particle aqueous dispersion passes through a second filter screen in the oscillation box to remove smaller impurities; finally obtaining a solid particle aqueous dispersion product which does not contain large particles and has uniform particle size, and controlling discharging through a discharging control valve;

S4: when the PLC control system detects that the discharging flow rate of the solid particle aqueous dispersion is less than the set flow rate of the discharging control valve, controlling the feeding control valve to stop feeding, and opening the tank for cleaning after discharging is finished;

S5: and taking down the top cover, then taking out the filter ring for cleaning, or replacing the first filter screen on the filter ring, and continuously filtering after the installation is finished.

the invention has the beneficial effects that: the filtering equipment breaks large-particle aqueous dispersion by adopting stirring and grinding modes, large particles and impurities cannot pass through the filtering ring, the solid-particle aqueous dispersion is further refined and removed with smaller impurities by adopting oscillation filtering after passing through the filtering ring, and the equipment is easy to disassemble and clean and is not easy to block, convenient to clean and high in automation degree compared with the traditional filtering equipment; the filtering method adopts a multiple filtering mode, and continuous and efficient filtering is carried out by combining the application of certain pressure and the rotation to generate vortex; the technical scheme has the advantages of simple structure, simple and convenient operation, continuous production, high filtering efficiency, easy cleaning and the like, and is suitable for filtering aqueous dispersions of solid particles such as aqueous color paste, coal water slurry and the like.

Drawings

FIG. 1 is a schematic diagram of the construction of the filtration apparatus of the present invention;

FIG. 2 is a top view of a blade according to an embodiment of the present invention;

FIG. 3 is a top view of a solid plate according to an embodiment of the present invention;

FIG. 4 is a schematic view of a wiper blade according to an embodiment of the present invention;

FIG. 5 is a schematic view of a filter cartridge according to an embodiment of the present invention;

FIG. 6 is a schematic view of a single resilient element of the filtration apparatus of the present invention;

in the figure: 1, a tank body; 2, top cover; 3, feeding a pipe; 4 a feed control valve; 5 discharging a pipe; 6 a discharge control valve; 7, an air compressor; 8 a pressure gauge; 9 a liquid level meter; 10, a first motor; 11, a stirring shaft; 12 paddles; 12-1, scraping; 12-2 through holes; 13, filtering a ring; 13-1 a first screen; 13-2, locking ring; 13-3 circular holes; 14 a solid plate; 14-1, plate surface; 14-2 support rods; 15 a baffle; 16 oscillating box; 17 a second screen; 18 an elastic element; 18-1 spring; 18-2 spring seats; 18-3 adjusting knob; 19 a roller; and 20, a second motor.

Detailed Description

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

This embodiment describes a filtering apparatus for solid particle aqueous dispersion in detail, and the specific structure is shown in fig. 1: the filtering equipment for the solid particle aqueous dispersion comprises a tank body 1, a filtering unit and an oscillating unit, wherein the tank body comprises a top cover 2, a bottom cover and a side wall positioned between the bottom cover and the top cover, the tank body 1 is provided with a feeding pipe 3, a discharging pipe 5, an air compressor 7, a pressure gauge 8 and a liquid level meter 9, the filtering unit and the oscillating unit are positioned in the tank body, the oscillating unit is positioned below the filtering unit, a guide plate 15 is arranged in the tank body between the filtering unit and the oscillating unit, and the guide plate is used for guiding the aqueous dispersion filtered out from the filtering unit into the oscillating unit;

Wherein, the filtering unit comprises a stirring shaft 11, blades 12, a filtering ring 13 and a solid plate 14, the filtering ring 13 is fixedly arranged in the tank body 1, the stirring shaft 11 is positioned in the filtering ring, the stirring shaft 11 is vertically arranged along the central axis direction of the tank body, the upper end of the stirring shaft 11 is connected with the output shaft of the motor I10 in a positioning manner and driven by the motor to rotate, the lower end of the stirring shaft is fixedly provided with a plurality of blades 12, the included angle between each blade and the horizontal plane is an acute angle, more preferably, the included angle between each blade and the horizontal plane is not more than 30 degrees, the length of the projection of each blade 12 on the horizontal plane is slightly smaller than the diameter of the first filtering screen 13-1, as shown in figure 2, 3 blades are arranged in the embodiment, the solid plate 14 is fixedly arranged in the tank body below the filtering ring, the lower end of the filtering ring 13 is tightly attached to the upper surface of the solid plate 14, the water, as shown in fig. 4, a plurality of scraping blades 12-1 are arranged below the paddle along the length direction thereof, and the scraping blades are used for grinding the slurry on the solid plate 14, specifically, the scraping blades 12-1 are arranged along the length direction of the lower end of the whole paddle, and the adjacent scraping blades are partially connected, a gap is arranged between the blades of the scraping blades, and a plurality of through holes 12-2 are arranged on the scraping blades, in this embodiment, the scraping blades are trapezoidal, and 2 through holes are arranged on a single scraping blade.

as shown in fig. 3, the solid plate 14 includes a plate surface 14-1 and a plurality of support rods 14-2, one end of each support rod is connected to the plate surface and is arranged at an interval, the other end of each support rod is fixed to the side wall of the tank body, the plate surface 14-1 is in a right cone shape, an included angle between a generatrix of the cone and a horizontal plane is equal to an included angle between the paddle 12 and the horizontal plane, in this embodiment, the included angle between the generatrix of the cone and the horizontal plane and the included angle between the paddle and the horizontal plane are both 15 °, and 4 support rods.

As shown in fig. 5, the filter ring 13 includes a first filter screen 13-1 and a locking ring 13-2, the first filter screen 13-1 is a hollow cylinder structure with an upper opening and a lower opening, and the upper end of the first filter screen is fixedly connected with the locking ring, the locking ring 13-2 is provided with a plurality of circular holes 13-3, in this embodiment, the locking ring is provided with 4 circular holes, the locking ring is detachably fixed to the top cover 2, the diameter of the mesh holes on the first filter screen is 1-5 mm, specifically, the diameter of the mesh holes on the first filter screen is 3mm, and the diameter of the first filter screen is smaller than the inner diameter of the tank body 1.

In this embodiment, the baffle 15 is obliquely disposed in the tank between the filter unit and the oscillation unit, the upper end of the baffle 15 is fixed to the sidewall of the tank, the lower end is a free end and is located right above the oscillation box 16, and when the aqueous dispersion is thrown off the filter ring, the aqueous dispersion falls into the baffle 15 through the gap between the support rods 14-2, because the baffle is oblique, the aqueous dispersion directly slides from the baffle into the oscillation box 16.

The oscillating unit comprises an oscillating box 16, a second filter screen 17 is arranged in the oscillating box, the oscillating box is divided into an upper layer and a lower layer by the second filter screen, two ends of the oscillating box are symmetrically connected with elastic elements 18, the lower end of the oscillating box 16 is connected with a second motor 20, the oscillating box rotates and oscillates in the tank body under the combined action of the second motor 20 and the elastic elements 18, and the filtered water-based dispersion is discharged out of the tank body from the oscillating box through a discharge pipe 5. The external diameter of vibration case 16 is less than the internal diameter of jar body 1, second filter screen 17 is wire mesh, and the external diameter of this second filter screen is the same with the internal diameter of vibration case, and inside the second filter screen was fixed in the vibration case through the buckle, the diameter of mesh is 0.1 ~ 1mm on the second filter screen, the bottom of vibration case 16 is equipped with two at least gyro wheels 19, and this gyro wheel is arranged jar body end cover in and can be rolled wantonly on the bottom, and in this embodiment, the diameter of mesh is 0.5mm on the second filter screen to set up two gyro wheels 19 and four elastic element 18.

As shown in fig. 6, the elastic element 18 includes a spring 18-1, a spring seat 18-2 and an adjusting knob 18-3, the spring is disposed in the tank body, one end of the spring is connected to the inner side of the spring seat, the other end of the spring is connected to the outer side of the oscillation box 16, the spring seat is disposed outside the side wall of the box body, and the adjusting knob is fixed to the outer side of the spring seat.

in this embodiment, the bottom and the lateral wall are integrated into one piece, top cap 2 detachably connects to the lateral wall, and this top cap 2 connects to the lateral wall through locking device, and the top cap can be taken off from the lateral wall after loosening locking device, is convenient for take out jar internal filter ring 13 and washs, or changes first filter screen 13-1 on the filter ring. The feed pipe 3, the first motor 10, the pressure gauge 8 and the liquid level meter 9 are arranged on the top cover of the tank body, the feeding pipe is provided with a feeding control valve 4, the air outlet of the air compressor 7 is connected in the tank body, the discharge pipe 5 passes through the bottom cover of the tank body and is communicated with the oscillation box 16, a discharge control valve 6 is arranged on the discharge pipe, the second motor 20 is arranged on the bottom cover of the tank body, the feeding control valve 4, the discharging control valve 6, the air compressor 7, the pressure gauge 8, the liquid level meter 9, the first motor 10, the adjusting knob 18-3 and the second motor 20 are all connected to a PLC control system, this PLC control system mainly used each electric component's in this filtration equipment start-up close, each electric component carries out the operation according to the setting parameter, various data information's processing etc. PLC control system in this application is the common control system in numerical control field, no longer gives unnecessary details in this application. The PLC control system can enable the process parameters to be set more accurately and conveniently, monitors the pressure and the liquid level inside the equipment in real time, and properly adjusts corresponding parameters to keep stable filtration.

The filtering process of the invention comprises the following steps: the method comprises the following steps:

S1: the PLC control system is used for setting technological parameters of a feeding control valve 4, a discharging control valve 6, an air compressor 7, a pressure gauge 8, a liquid level meter 9, a first motor 10, an adjusting knob 18-3 of an elastic element and a second motor 20;

S2: the solid particle aqueous dispersion controls the feeding flow through a feeding control valve 4, enters the tank body through a feeding pipe 3 and falls onto a solid plate 14; stirring the solid particle aqueous dispersion by a blade 12 and grinding by a scraping blade 12-1, wherein large particles are broken and then pass through a filtering ring 13, the residual large particles cannot pass through the filtering ring and are left on a solid plate for continuous stirring and grinding, and impurities are blocked by the filtering ring; an air compressor 7 is used for manufacturing high pressure to ensure that a filter ring is not easy to block, a pressure gauge 8 is used for monitoring the pressure in the tank body to prevent the pressure from being too high, a liquid level meter 9 is used for monitoring the liquid level in the tank body and synchronously controlling the feeding flow, and thus the first filtering is completed;

s3: the solid particle aqueous dispersion passes through the filter ring 13 and then downwards enters the oscillation box 16 through the guide plate 15, and the oscillation box rotationally oscillates on the horizontal plane under the combined action of the second motor 20 and the elastic element 18, so that the solid particle aqueous dispersion is further refined; the solid particle aqueous dispersion passes through a second screen 17 in the oscillation box to remove smaller impurities; finally obtaining a solid particle aqueous dispersion product which does not contain large particles and has uniform particle size, and controlling discharging through a discharging control valve;

S4: when the PLC control system detects that the discharging flow rate of the solid particle aqueous dispersion is less than the set flow rate of the discharging control valve, controlling the feeding control valve to stop feeding, and opening the tank for cleaning after discharging is finished;

s5: and (3) taking down the top cover, then taking out the filter ring 13 for cleaning, or replacing the first filter screen 13-1 on the filter ring, and continuing to filter after the installation is finished.

It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. an apparatus for filtering an aqueous dispersion of solid particles, characterized by: the device comprises a tank body (1), a filtering unit and an oscillating unit, wherein the tank body comprises a top cover (2), a bottom cover and a side wall positioned between the bottom cover and the top cover, the tank body (1) is provided with a feeding pipe (3) and a discharging pipe (5), the filtering unit and the oscillating unit are positioned in the tank body, the oscillating unit is positioned below the filtering unit, a guide plate (15) is arranged in the tank body between the filtering unit and the oscillating unit, and the guide plate is used for guiding aqueous dispersion filtered out from the filtering unit into the oscillating unit;

The filter unit comprises a stirring shaft (11), blades (12), a filter ring (13) and a solid plate (14), the filter ring (13) is fixedly arranged in the tank body (1), the stirring shaft (11) is positioned in the filter ring, the upper end of the stirring shaft is connected with an output shaft of a motor I (10) in a positioning mode and driven by the motor to rotate, the lower end of the stirring shaft is fixedly provided with the blades (12), the included angle between each blade and the horizontal plane is an acute angle, a plurality of scraping blades (12-1) are arranged below each blade along the length direction of each blade, the solid plate (14) is fixedly arranged in the tank body below the filter ring, and the lower end of the filter ring (13) is tightly attached to the upper surface of the solid plate (14);

the vibration unit comprises a vibration box (16), a second filter screen (17) is arranged in the vibration box, the vibration box is divided into an upper layer and a lower layer by the second filter screen, two ends of the vibration box are connected with elastic elements (18), the lower end of the vibration box (16) is connected with a second motor (20), and the vibration box performs rotary vibration in the tank under the combined action of the second motor (20) and the elastic elements (18).

2. the apparatus for filtering an aqueous dispersion of solid particles according to claim 1, wherein: the bottom cover and the side wall are integrally formed, and the top cover (2) is detachably connected to the side wall.

3. The apparatus for filtering an aqueous dispersion of solid particles according to claim 2, wherein: the filter ring (13) comprises a first filter screen (13-1) and a locking ring (13-2), the first filter screen (13-1) is of a hollow cylinder structure with an upper opening and a lower opening, the upper end of the first filter screen is fixedly connected with the locking ring, a plurality of round holes (13-3) are formed in the locking ring (13-2), the locking ring is detachably fixed on the top cover (2), the diameter of a mesh hole in the first filter screen is 1-5 mm, and the diameter of the first filter screen is smaller than the inner diameter of the tank body (1).

4. the apparatus for filtering an aqueous dispersion of solid particles according to claim 3, wherein: the stirring shaft (11) is vertically arranged along the direction of the central axis of the tank body, the length of the projection of the paddle (12) on the horizontal plane is slightly smaller than the diameter of the first filter screen (13-1), the included angle between the paddle and the horizontal plane is not more than 30 degrees, the scraping blades (12-1) are arranged along the length direction of the lower end of the whole paddle, the adjacent scraping blades are partially connected, a gap is arranged between the cutting edges of the scraping blades, and a plurality of through holes (12-2) are formed in the scraping blades.

5. The apparatus for filtering an aqueous dispersion of solid particles according to claim 1, wherein: the solid plate (14) comprises a plate surface (14-1) and a plurality of supporting rods (14-2) with one ends connected to the plate surface and arranged at intervals, the other ends of the supporting rods are fixed to the side wall of the tank body, the plate surface (14-1) is in a right cone shape, and the included angle between the generatrix of the cone and the horizontal plane is equal to the included angle between the paddle (12) and the horizontal plane.

6. The apparatus for filtering an aqueous dispersion of solid particles according to claim 1, wherein: the guide plate (15) is obliquely arranged in the tank body between the filtering unit and the oscillating unit, the upper end of the guide plate (15) is fixed on the side wall of the tank body, and the lower end of the guide plate is a free end and is positioned right above the oscillating box (16).

7. the apparatus for filtering an aqueous dispersion of solid particles according to claim 1, wherein: the external diameter of surge tank (16) is less than the internal diameter of the jar body (1), second filter screen (17) are wire mesh, and the external diameter of this second filter screen is the same with the internal diameter of surge tank, and inside the second filter screen was fixed in the surge tank through the buckle, the diameter of mesh is 0.1 ~ 1mm on the second filter screen, the bottom of surge tank (16) is equipped with two at least gyro wheels (19), and this gyro wheel is arranged in jar body bottom and is covered and can be rolled wantonly on the bottom.

8. The apparatus for filtering an aqueous dispersion of solid particles according to claim 7, wherein: the elastic element (18) comprises a spring (18-1), a spring seat (18-2) and an adjusting knob (18-3), the spring is arranged in the tank body, one end of the spring is connected with the inner side of the spring seat, the other end of the spring is connected with the outer side of the oscillating box (16), the spring seat is arranged outside the side wall of the box body, and the adjusting knob is fixed on the outer side of the spring seat.

9. The apparatus for filtering an aqueous dispersion of solid particles according to claim 1, wherein: be equipped with air compressor machine (7), pressure gauge (8) and level gauge (9) on jar body (1), inlet pipe (3), motor (10), pressure gauge (8) and level gauge (9) are arranged in on the top cap of jar body, are equipped with feeding control valve (4) on this inlet pipe, the gas outlet of air compressor machine (7) is connected in jar internally, discharging pipe (5) are passed the bottom of jar body and are communicated in surge tank (16), be equipped with ejection of compact control valve (6) on the discharging pipe, motor two (20) are located on the bottom cap of the jar body, feeding control valve (4), ejection of compact control valve (6), air compressor machine (7), pressure gauge (8), level gauge (9), motor (10), adjust knob (18-3) and motor two (20) all are connected to PLC control system.

10. A filtration method using the filtration apparatus for an aqueous solid particle dispersion according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

S1: the PLC control system is used for setting technological parameters of a feeding control valve, a discharging control valve, an air compressor, a pressure gauge, a liquid level meter, a first motor, an adjusting knob of an elastic element and a second motor;

S2: controlling the feeding flow of the solid particle aqueous dispersion through a feeding control valve, entering the tank body through a feeding pipe, and falling onto a solid plate; stirring the solid particle aqueous dispersion by a blade and grinding by a scraping blade, wherein large particles are smashed and then pass through a filtering ring, residual large particles cannot pass through the filtering ring, the residual large particles are left on a solid plate for continuous stirring and grinding, and impurities are blocked by the filtering ring; an air compressor is used for producing high pressure to ensure that the filter ring is not easy to block, a pressure gauge is used for monitoring the pressure in the tank body to prevent the pressure from being overhigh, a liquid level meter is used for monitoring the liquid level in the tank body and synchronously controlling the feeding flow, and thus the first filtering is completed;

s3: the solid particle aqueous dispersion passes through the filter ring, then enters the oscillation box through the guide plate, and the oscillation box rotationally oscillates on the horizontal plane under the combined action of the motor II and the elastic element, so that the solid particle aqueous dispersion is further refined; the solid particle aqueous dispersion passes through a second filter screen in the oscillation box to remove smaller impurities; finally obtaining a solid particle aqueous dispersion product which does not contain large particles and has uniform particle size, and controlling discharging through a discharging control valve;

s4: when the PLC control system detects that the discharging flow rate of the solid particle aqueous dispersion is less than the set flow rate of the discharging control valve, controlling the feeding control valve to stop feeding, and opening the tank for cleaning after discharging is finished;

S5: and taking down the top cover, then taking out the filter ring for cleaning, or replacing the first filter screen on the filter ring, and continuously filtering after the installation is finished.