CN111701940B - Spiral conveying type filter material cleaning and screening device - Google Patents

Abstract

A spiral conveying type filter material cleaning and screening device. The main aim at provides a device that washs and sieves the filter material that oil field sewage filter tank used in order to realize the reuse of filter material. The method is characterized in that: the filter material cleaning device comprises a cleaning unit, a rinsing unit, a drying unit and a screening unit, wherein the cleaning unit is used for mixing and stirring filter materials with washing liquid in the spiral conveying process; the rinsing unit is used for mixing and stirring the filter material with clean water in the spiral conveying process so as to achieve the purpose of washing away residual detergent on the filter material; the drying unit is used for heating and drying the filter material in the spiral conveying process so as to be beneficial to smooth screening of the next procedure; the drying unit is used for heating and drying the filter material in the spiral conveying process so as to be beneficial to smooth screening of the next procedure.

Description

Spiral conveying type filter material cleaning and screening device

Technical Field

The invention relates to a mechanical device for cleaning and screening filtering sand used by an oilfield sewage filtering tank to realize recycling.

Background

In the field of oil fields and other engineering fields needing filtering, various filtering tanks are widely applied as common equipment for advanced sewage treatment. Various sand materials laid in layers are main filtering materials of the filtering tank, and after the filtering sand materials are used for a certain time, the filtering performance is reduced and even blocked to lose the filtering performance due to the adhesion and pollution of impurities such as sump oil, sludge and the like. If the used filtering sand material is directly discarded, the environment is polluted, and the cost for replacing the filtering sand material is high. Therefore, the used filtering sand can be recycled if being cleaned and screened.

At present, the cleaning and screening treatment modes of the filtering sand used by the filtering tank have defects. The sand material is filtered in the manual cleaning and screening outside the filtering tank, although the treatment effect is better, the labor intensity is high, and the treatment efficiency is low. Filtration jar online cleaning techniques such as bubble type, although low in labor strength, nevertheless need reform transform the filtration jar to online cleaning effect is not good in filtering the jar, and each layer sand material of meeting confusion moreover causes the filtration effect to reduce when filtering the jar and reusing.

Disclosure of Invention

In order to solve the technical problems mentioned in the background technology, the invention develops a cleaning and screening mechanical device with higher automation degree, which not only can effectively realize the cleaning and screening functions of the filtering sand outside the filtering tank, but also can reduce the labor intensity of workers and has high treatment efficiency.

The technical scheme adopted by the invention for solving the technical problems is as follows: the whole device consists of four process units, namely a cleaning unit, a rinsing unit, a drying unit and a screening unit, and four continuous treatment processes of cleaning, rinsing, drying and screening of the filtered sand are respectively completed.

The cleaning unit includes: the device comprises a first speed reducing motor, a first lower shaft seat, a first feed hopper, a first main cylinder, a first spiral rotor, a first liquid inlet pipe, a first upper shaft seat, a first discharge port, a first short support and a first liquid discharge pipe; the cleaning unit is used for mixing and stirring the filter material and the cleaning solution in the spiral conveying process so as to achieve the purpose of cleaning oil stains adhered to the filter material;

the first main cylinder body is a long cylinder which is obliquely arranged, flanges are arranged at two ends of the first main cylinder body, and the first main cylinder body is connected with the first upper shaft seat and the first lower shaft seat through bolts; an upper opening of the side face of the lower end of the first main cylinder is welded with the first feed hopper, a lower opening of the screen mesh is welded with the first liquid discharge pipe, and a first short support is welded near the first liquid discharge pipe; an upper opening of the side face of the upper end of the first main cylinder is welded with the first liquid inlet pipe, and a lower opening of the side face of the upper end of the first main cylinder is welded with the first discharge hole;

the first spiral rotor is arranged in the first main cylinder body and is a spiral plate welded on a long shaft, the outer diameter of the spiral plate is in small clearance fit with the inner wall of the first main cylinder body, and the lower end of the long shaft is provided with a boss and a key groove and is connected with the first speed reducing motor, so that the forward conveying of materials is realized in a rotating mode, and the stirring and mixing functions are realized;

the first upper shaft base is arranged at the upper end of the first main cylinder body through a bolt, consists of a first flange base and a first upper shaft sleeve and is used for supporting the upper end of the first spiral rotor;

the first lower shaft seat is mounted at the lower end of the first main cylinder through a bolt, is used for supporting the lower end of the first spiral rotor and is used for mounting the first speed reduction motor; the first lower shaft seat consists of a first short cylinder seat, a first sealing gasket, a first lower shaft sleeve and a first sealing ring, wherein the first sealing gasket is used for sealing the first short cylinder seat and the lower end of the first main cylinder, and the first sealing ring is used for sealing the first lower shaft sleeve and the lower end of the first spiral rotor;

the first speed reducing motor is an explosion-proof speed reducing motor, is arranged on the first lower shaft seat at the lower end of the first main cylinder and is used for driving the first spiral rotor to rotate at a low speed;

the first short support is a cylindrical seat, the upper end of the first short support is welded on the side face of the lower end of the first main cylinder, and the lower end of the first short support is fixed on a foundation through foundation bolts and used for supporting the first main cylinder;

the materials in the cleaning unit move according to the following flow: washing liquid is injected into the first main cylinder body through the first liquid inlet pipe, flows downwards in an inclined mode, is mixed and stirred with filter materials, and then washed waste liquid is discharged into a waste liquid pool through the first liquid discharge pipe; the filter material is loaded into the first main cylinder body through the first feed hopper, conveyed obliquely upwards through the first spiral rotor and mixed and stirred with the washing liquid, and the washed filter material enters the second feed inlet of the rinsing unit through the first discharge outlet;

the rinsing unit includes: the second speed reducing motor, a second lower shaft seat, a second feeding hole, a second main cylinder, a second spiral rotor, a second liquid inlet pipe, a second upper shaft seat, a second discharging hole, a second short support and a second liquid discharging pipe; the rinsing unit is used for mixing and stirring the filter material with clean water in the spiral conveying process so as to achieve the purpose of washing away residual detergent on the filter material;

the second main cylinder body is an obliquely-installed long cylinder, flanges are arranged at two ends of the second main cylinder body, and the second main cylinder body is connected with the second shaft base through bolts; a large opening is formed in the upper portion of the side face of the lower end of the second main cylinder body and welded with the second feeding hole, a small opening of a screen is formed in the lower portion of the side face of the lower end of the second main cylinder body and welded with the second liquid discharge pipe, and a second short support is welded nearby the second liquid discharge pipe; a small opening is formed in the upper portion of the side face of the upper end of the second main cylinder body and is welded with the second liquid inlet pipe, and a large opening is formed in the lower portion of the side face of the upper end of the second main cylinder body and is welded with the second discharge hole;

the structure of the second spiral rotor is the same as that of the first spiral rotor; the structure of the second upper shaft seat is the same as that of the first upper shaft seat; the structure of the second lower shaft seat is the same as that of the first lower shaft seat; the type of the second speed reduction motor is the same as that of the first speed reduction motor; the structure of the second short support is the same as that of the first short support;

the materials in the rinsing unit move according to the following flow: clear water is injected into the second main cylinder body through the second liquid inlet pipe, flows downwards in an inclined mode, is mixed and stirred with the filter material, and then is discharged into a waste liquid pool through the second liquid discharge pipe; the filter material enters the second main cylinder body from the second feeding hole, is conveyed obliquely upwards through the second spiral rotor and is mixed and stirred with clear water, and the rinsed filter material enters the third feeding hole of the drying unit from the second discharging hole;

the drying unit includes: the third speed reducing motor, a third lower shaft seat, a third feeding port, a third main cylinder, a third spiral rotor, an axial flow fan, a third upper shaft seat, a third discharging port, a third short support and a heating and insulating layer; the drying unit is used for heating and drying the filter material in the spiral conveying process so as to facilitate the purpose of smooth screening of the next process;

the third main cylinder body is an obliquely-installed long cylinder, flanges are arranged at two ends of the third main cylinder body, and the third main cylinder body is connected with the third shaft base through bolts; a large opening is formed above the side face of the lower end of the third main cylinder and is welded with the third feeding port, and a third short support is welded below the side face of the lower end of the third main cylinder; a large screen opening is formed above the side surface of the upper end of the third main cylinder and connected with the axial flow fan, and a large opening is formed below the side surface of the upper end of the third main cylinder and welded with the third discharge hole;

the structure of the third screw rotor is the same as that of the first screw rotor; the structure of the third upper shaft seat is the same as that of the first upper shaft seat; the structure of the third lower shaft seat is the same as that of the first lower shaft seat; the type of the third speed reduction motor is the same as that of the first speed reduction motor; the third short support is the same as the first short support in structure; the heating and insulating layer consists of an electric heating belt and an insulating layer, wraps the outer wall of the middle part of the third main cylinder body, and is used for heating and drying the filter material in the third main cylinder body; the axial flow fan is arranged above the side surface of the upper end of the third main cylinder and used for pumping out moisture generated during drying of the filter material and accelerating the drying process;

the materials in the drying unit move according to the following flow: the filter material enters the third main cylinder from the third feeding hole at the lower part, is conveyed towards the upper part obliquely through the third spiral rotor, and enters the fourth feeding hole of the screening unit from the third discharging hole at the upper part after being heated and dried;

the sieving unit includes: the fourth speed reducing motor, a fourth lower shaft seat, a fourth feeding hole, a fourth main cylinder, a fourth spiral rotor, a fourth discharging pipe, a fourth upper shaft seat, a high support, a fourth short support, a receiving groove and a material collecting plate; the screening unit is used for screening and separating the filter materials according to the size of particles in the spiral conveying process;

the fourth main cylinder is a screen cylinder which is obliquely arranged, two end faces of the fourth main cylinder are flanges, and the fourth main cylinder is connected with the fourth shaft seat through a bolt; a large opening is formed in the upper portion of the side face of the lower end of the fourth main cylinder body and is welded with the fourth feeding hole, and a fourth short support is welded below the large opening; an opening below the side face of the upper end of the fourth main cylinder is welded with the fourth discharge pipe; a plurality of groups of small holes are sequentially processed on the lower semi-cylinder wall in the middle of the fourth main cylinder body from bottom to top according to the size from small to large to form a screen structure, and the screen structure is matched with the material collecting plates on the outer side in a grouping manner to realize the function of screening sand materials in groups according to the size;

the structure of the fourth screw rotor is the same as that of the first screw rotor; the structure of the fourth upper shaft seat is the same as that of the first upper shaft seat; the structure of the fourth lower shaft seat is the same as that of the first lower shaft seat; the type of the fourth speed reduction motor is the same as that of the first speed reduction motor; the structure of the fourth short support is the same as that of the first short support;

the material collecting plates are a plurality of plates with edges at two sides, are welded at the boundary of two groups of screen holes on the lower side surface of the fourth main cylinder body and are used for collecting filter materials with the same size and preventing the filter materials from being mixed together during screening; the fourth discharge pipe is a short and thick pipe, is welded below the side face of the upper end of the fourth main cylinder body and is used for discharging the coarsest material; the material receiving grooves are rectangular grooves with a plurality of belt wheels at the lower parts, are placed below the fourth main cylinder body and are used for collecting filter materials with different sizes in a classified mode; the high support is a high cylindrical seat, the upper end of the high support is welded on the side face of the upper end of the fourth main cylinder, and the lower end of the high support is fixed on a foundation through foundation bolts and used for supporting the screening unit;

the materials in the screening unit move according to the following flow: the filter material by the fourth feed inlet gets into in the fourth main barrel, through fourth screw rotor is carried to the top that inclines, process during each group's screen hole of the middle part downside of fourth main barrel, spill according to from little to big in proper order fourth main barrel, quilt the board that gathers materials collects and corresponds connect in the silo, the maximum size filter material that does not filtered is followed the fourth discharging pipe is gone out, falls to corresponding connect in the silo.

The invention has the following beneficial effects: the device integrates four procedures of cleaning, rinsing, drying and screening, and the sand material cleaning and screening treatment effect is good; the device has an automatic continuous processing flow, low labor intensity, large sand material processing capacity and high production efficiency; the four process units arranged in the device are relatively independent, can be installed in a straight shape or a zigzag shape, and are flexible in layout mode.

Description of the drawings:

FIG. 1 is a front view of a layout of four units of the whole set of apparatus in a straight line;

FIG. 2 is a perspective view of a zigzag layout of four units of the whole device;

FIG. 3 is a front view of the cleaning unit of the apparatus;

FIG. 4 is a front view of a first main cylinder component of the wash unit;

FIG. 5 is a front view of a first screw rotor of the wash unit;

FIG. 6 is a front view of a first lower spindle base of the wash unit;

FIG. 7 is a front view of a first upper spindle seat of the wash unit;

FIG. 8 is a front view of the rinse unit of the apparatus;

FIG. 9 is a front view of the drying unit of the apparatus;

figure 10 is a front view of the screening unit of the device;

figure 11 is a front view of a fourth main cylinder part of the screening unit;

figure 12 is a cross-sectional view of the fourth main cylinder of the screening unit in connection with the aggregate plate;

figure 13 is a front view of the receiving chute of the screening unit.

In the figure: 1. a cleaning unit: 101. first gear motor, 102, first axle seat: 10201. first short cylinder seat, 10202, first sealed pad, 10203, first axle sleeve down, 10204, first sealing washer, 103, first feeder hopper, 104, first main cylinder, 105, first screw rotor, 106, first feed liquor pipe, 107, first axle bed of going up: 10701. the device comprises a first flange seat 10702, a first upper shaft sleeve 108, a first discharge hole 109, a first short support seat 1010 and a first liquid discharge pipe; 2. a rinsing unit: 201. a second speed reducing motor 202, a second lower shaft seat 203, a second feeding hole 204, a second main cylinder 205, a second screw rotor 206, a second liquid inlet pipe 207, a second upper shaft seat 208, a second discharging hole 209, a second short support, 2010 and a second liquid discharging pipe; 3. a drying unit: 301. a third speed reducing motor 302, a third lower shaft seat 303, a third feeding port 304, a third main cylinder 305, a third screw rotor 306, an axial flow fan 307, a third upper shaft seat 308, a third discharging port 309, a third short support 3010 and a heating insulation layer; 4. a screening unit: 401. a fourth speed reducing motor, 402, a fourth lower shaft seat, 403, a fourth feed inlet, 404, a fourth main cylinder, 405, a fourth spiral rotor, 406, a fourth discharge pipe, 407, a fourth upper shaft seat, 408, a high support, 409, a fourth short support, 4010, a material receiving groove, 4011 and a material collecting plate.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings in which:

the whole device consists of four process units, namely a cleaning unit, a rinsing unit, a drying unit and a screening unit, and four continuous treatment processes of cleaning, rinsing, drying and screening of the filtered sand are respectively completed.

The cleaning unit comprises: the device comprises a first speed reducing motor, a first lower shaft seat, a first feed hopper, a first main cylinder, a first spiral rotor, a first liquid inlet pipe, a first upper shaft seat, a first discharge port, a first short support and a first liquid discharge pipe; the device is used for mixing and stirring the filtering sand material and the washing liquid in the spiral conveying process so as to achieve the purpose of washing off the oil stains adhered to the filtering sand material.

The first main cylinder body is an obliquely-installed long cylinder, flanges are arranged at two ends of the first main cylinder body, and the first main cylinder body is connected with the first shaft base through bolts; an upper opening of the side face of the lower end of the first main cylinder is welded with the first feed hopper, a lower opening of the screen is welded with the first liquid discharge pipe, and a first short support is welded nearby the first liquid discharge pipe; the upper part of the side face of the upper end of the first main cylinder body is provided with a small opening which is welded with the first liquid inlet pipe, and the lower part of the side face of the upper end of the first main cylinder body is provided with a large opening which is welded with the first discharge hole.

The first spiral rotor is arranged in the first main cylinder body and is a long shaft welded spiral plate, the outer diameter of the spiral plate is in small clearance fit with the inner wall of the first main cylinder body, a boss and a key groove are arranged at the lower end of the long shaft and are connected with the first speed reducing motor, forward conveying of materials is achieved in a rotating mode, and the stirring and mixing functions are achieved.

The first upper shaft base is installed at the upper end of the first main cylinder body through a bolt, is composed of a first flange base and a first upper shaft sleeve and is used for supporting the upper end of the first spiral rotor.

The first lower shaft seat is mounted at the lower end of the first main cylinder through a bolt, is used for supporting the lower end of the first spiral rotor and is used for mounting the first speed reduction motor; the first lower shaft seat is composed of a first short cylinder seat, a first sealing gasket, a first lower shaft sleeve and a first sealing ring, wherein the first sealing gasket is used for sealing the first short cylinder seat and the lower end of the first main cylinder, and the first sealing ring is used for sealing the first lower shaft sleeve and the lower end of the first spiral rotor.

The first speed reducing motor is an explosion-proof speed reducing motor, is arranged on the first lower shaft seat at the lower end of the first main cylinder and is used for driving the first spiral rotor to rotate at a low speed.

The first short support is a cylindrical seat, the upper end of the first short support is welded to the side face of the lower end of the first main cylinder, and the lower end of the first short support is fixed to the foundation through foundation bolts and used for supporting the first main cylinder.

The process flow of the cleaning unit is as follows: washing liquid is injected into the first main cylinder body from the first liquid inlet pipe at the upper part, flows downwards in an inclined mode, is mixed and stirred with the filtering sand material, and then washed waste liquid is discharged into a waste liquid pool through the first liquid discharge pipe at the lower part; the filtering sand material is loaded into the first main barrel body through the first feed hopper at the lower part, is conveyed obliquely upwards through the first spiral rotor and is mixed and stirred with washing liquid, and the washed filtering sand material enters the second feed inlet of the rinsing unit through the first discharge port at the upper part.

The rinsing unit comprises: the second speed reducing motor, a second lower shaft seat, a second feeding hole, a second main cylinder, a second spiral rotor, a second liquid inlet pipe, a second upper shaft seat, a second discharging hole, a second short support and a second liquid discharging pipe; the washing agent is used for mixing and stirring the filtering sand material and clean water in the spiral conveying process so as to achieve the purpose of washing away the residual washing agent on the filtering sand material.

The second main cylinder body is an obliquely-installed long cylinder, flanges are arranged at two ends of the second main cylinder body, and the second main cylinder body is connected with the second shaft base through bolts; a large opening is formed in the upper portion of the side face of the lower end of the second main cylinder body and welded with the second feeding hole, a small opening of a screen is formed in the lower portion of the side face of the lower end of the second main cylinder body and welded with the second liquid discharge pipe, and a second short support is welded nearby the second liquid discharge pipe; the upper side of the side face of the upper end of the second main cylinder body is provided with a small opening which is welded with the second liquid inlet pipe, and the lower side of the side face of the upper end of the second main cylinder body is provided with a large opening which is welded with the second discharge hole.

The second helical rotor is identical in structure and use to the first helical rotor.

The structure and the purpose of the second upper shaft seat are the same as those of the first upper shaft seat.

The structure and the purpose of the second lower shaft seat are the same as those of the first lower shaft seat.

The second reduction motor is the same type and purpose as the first reduction motor.

The second short support is the same in structure and purpose as the first short support.

The rinsing unit comprises the following process flows: clear water is injected into the second main cylinder body through the second liquid inlet pipe at the upper part, flows downwards in an inclined manner, is mixed and stirred with the filtering sand material, and then the rinsed waste liquid is discharged into a waste liquid pool through the second liquid outlet pipe at the lower part; the filtering sand material is fed into the second main barrel through the second feed inlet at the lower part, is conveyed obliquely upwards through the second spiral rotor and is mixed and stirred with clear water, and the filtering sand material after rinsing is fed into the third feed inlet of the drying unit through the second discharge outlet at the upper part.

The drying unit comprises: the third speed reducing motor, a third lower shaft seat, a third feeding port, a third main cylinder, a third spiral rotor, an axial flow fan, a third upper shaft seat, a third discharging port, a third short support and a heating and insulating layer; the heating and drying device is used for heating and drying the filtered sand material in the spiral conveying process so as to facilitate the smooth screening of the next procedure.

The third main cylinder body is an obliquely-installed long cylinder, flanges are arranged at two ends of the third main cylinder body, and the third main cylinder body is connected with the third shaft base through bolts; a large opening is formed in the upper portion of the side face of the lower end of the third main cylinder body and welded with the third feeding port, and a third short support is welded to the lower portion of the side face of the lower end of the third main cylinder body; and a screen mesh large opening is formed in the upper part of the side surface of the upper end of the third main cylinder body and is connected with the axial flow fan, and a large opening is formed in the lower part of the side surface of the upper end of the third main cylinder body and is welded with the third discharge port.

The third screw rotor is the same in structure and use as the first screw rotor.

The structure and the purpose of the third upper shaft seat are the same as those of the first upper shaft seat.

The structure and the purpose of the third lower shaft seat are the same as those of the first lower shaft seat.

The third reduction motor is the same type and purpose as the first reduction motor.

The third short support is the same in structure and purpose as the first short support.

The heating and heat-insulating layer is composed of an electric heating belt and a heat-insulating layer, wraps the outer wall of most of the middle barrel body of the third main barrel body and is used for heating and drying the filtering sand material in the third main barrel body.

And the axial flow fan is arranged above the side surface of the upper end of the third main cylinder and used for pumping out moisture generated during drying of the filtered sand material and accelerating the drying process.

The process flow of the drying unit is as follows: the filtering sand material is fed into the third main barrel through the third feed inlet at the lower part, is conveyed obliquely upwards through the third screw rotor, and is fed into the fourth feed inlet of the screening unit through the third discharge outlet at the upper part after being heated and dried.

The screening unit composition includes: the fourth speed reducing motor, a fourth lower shaft seat, a fourth feeding hole, a fourth main cylinder, a fourth spiral rotor, a fourth discharging pipe, a fourth upper shaft seat, a high support, a fourth short support, a receiving groove and a collecting plate; the screening device is used for screening and separating sand materials according to the size of particles in the spiral conveying process.

The fourth main cylinder is a screen cylinder which is obliquely arranged, two end faces of the fourth main cylinder are flanges, and the fourth main cylinder is connected with the fourth shaft seat through a bolt; a large opening is formed in the upper portion of the side face of the lower end of the fourth main cylinder body and is welded with the fourth feeding hole, and a fourth short support is welded below the large opening; an opening below the side face of the upper end of the fourth main cylinder is welded with the fourth discharge pipe; and a plurality of groups of small holes are sequentially processed on the middle lower semi-cylinder wall of the fourth main cylinder body from bottom to top from small to large to form a screen structure, and the screen structure is matched with the material collecting plates on the outer side in a grouping manner to realize the function of screening sand materials in groups of different sizes.

The fourth screw rotor is the same in structure and use as the first screw rotor.

The structure and the purpose of the fourth upper shaft seat are the same as those of the first upper shaft seat.

The structure and the purpose of the fourth lower shaft seat are the same as those of the first lower shaft seat.

The type and purpose of the fourth gear motor are the same as those of the first gear motor.

The structure and purpose of the fourth short support are the same as those of the first short support.

The flitch that gathers materials is the board that the edge was taken to the polylith both sides, welds in the boundary department of two sets of sieve mesh holes of the downside of fourth main cylinder body for collect the filtration sand material that the size is the same, mix together when preventing to sieve.

The fourth discharging pipe is a short thick pipe and is welded below the side face of the upper end of the fourth main cylinder body and used for discharging coarsest filtered sand.

The material receiving groove is a plurality of rectangular grooves with belt wheels at the lower part, is placed below the fourth main cylinder body and is used for collecting filtering sand materials with different sizes in a classified mode.

The high support is a higher cylindrical seat, the upper end of the high support is welded to the side face of the upper end of the fourth main cylinder, and the lower end of the high support is fixed to the foundation through foundation bolts and used for supporting the screening unit.

The process flow of the screening unit is as follows: filter sand material by the lower part the fourth feed inlet gets into in the fourth main cylinder body, through fourth screw rotor syncline top is carried, process during each group's screen hole of the middle part downside of fourth main cylinder body, spill according to from little to big in proper order fourth main cylinder body, quilt the board that gathers materials collects and corresponds in connecing the silo, the maximum dimension that does not filtered filters sand material and follows the fourth discharging pipe is gone out, falls to corresponding connect in the silo.

Four process unit structures of the whole device are relatively independent, and two installation layout modes can be realized: one is to arrange and install according to a straight line shape to shorten the occupied space in the width direction; the other is to arrange and mount the components in a zigzag manner to reduce the floor space in the longitudinal direction.

Claims (1)

1. The utility model provides a screening plant is washd to spiral delivery formula filter material, includes cleaning unit, rinsing unit, stoving unit and screening unit, its characterized in that:

the cleaning unit includes: the device comprises a first speed reducing motor, a first lower shaft seat, a first feed hopper, a first main cylinder, a first spiral rotor, a first liquid inlet pipe, a first upper shaft seat, a first discharge port, a first short support and a first liquid discharge pipe; the cleaning unit is used for mixing and stirring the filter material and the cleaning solution in the spiral conveying process so as to achieve the purpose of cleaning oil stains adhered to the filter material;

the first main cylinder body is a long cylinder which is obliquely arranged, flanges are arranged at two ends of the first main cylinder body, and the first main cylinder body is connected with the first upper shaft seat and the first lower shaft seat through bolts; an upper opening of the side face of the lower end of the first main cylinder is welded with the first feed hopper, a lower opening of the screen mesh is welded with the first liquid discharge pipe, and a first short support is welded near the first liquid discharge pipe; an upper opening of the side face of the upper end of the first main cylinder is welded with the first liquid inlet pipe, and a lower opening of the side face of the upper end of the first main cylinder is welded with the first discharge hole;

the first spiral rotor is arranged in the first main cylinder body and is a spiral plate welded on a long shaft, the outer diameter of the spiral plate is in small clearance fit with the inner wall of the first main cylinder body, and the lower end of the long shaft is provided with a boss and a key groove and is connected with the first speed reducing motor, so that the forward conveying of materials is realized in a rotating mode, and the stirring and mixing functions are realized;

the first upper shaft base is arranged at the upper end of the first main cylinder body through a bolt, consists of a first flange base and a first upper shaft sleeve and is used for supporting the upper end of the first spiral rotor;

the first lower shaft seat is mounted at the lower end of the first main cylinder through a bolt, is used for supporting the lower end of the first spiral rotor and is used for mounting the first speed reduction motor; the first lower shaft seat consists of a first short cylinder seat, a first sealing gasket, a first lower shaft sleeve and a first sealing ring, wherein the first sealing gasket is used for sealing the first short cylinder seat and the lower end of the first main cylinder, and the first sealing ring is used for sealing the first lower shaft sleeve and the lower end of the first spiral rotor;

the first speed reducing motor is an explosion-proof speed reducing motor, is arranged on the first lower shaft seat at the lower end of the first main cylinder and is used for driving the first spiral rotor to rotate at a low speed;

the first short support is a cylindrical seat, the upper end of the first short support is welded on the side face of the lower end of the first main cylinder, and the lower end of the first short support is fixed on a foundation through foundation bolts and used for supporting the first main cylinder;

the materials in the cleaning unit move according to the following flow: washing liquid is injected into the first main cylinder body through the first liquid inlet pipe, flows downwards in an inclined mode, is mixed and stirred with filter materials, and then washed waste liquid is discharged into a waste liquid pool through the first liquid discharge pipe; the filter material is loaded into the first main cylinder body through the first feed hopper, conveyed obliquely upwards through the first spiral rotor and mixed and stirred with the washing liquid, and the washed filter material enters the second feed inlet of the rinsing unit through the first discharge outlet;

the rinsing unit includes: the second speed reducing motor, a second lower shaft seat, a second feeding hole, a second main cylinder, a second spiral rotor, a second liquid inlet pipe, a second upper shaft seat, a second discharging hole, a second short support and a second liquid discharging pipe; the rinsing unit is used for mixing and stirring the filter material with clean water in the spiral conveying process so as to achieve the purpose of washing away residual detergent on the filter material;

the second main cylinder body is a long cylinder which is obliquely arranged, flanges are arranged at two ends of the second main cylinder body, and the second main cylinder body is connected with a second upper shaft seat and a second lower shaft seat through bolts; a large opening is formed in the upper portion of the side face of the lower end of the second main cylinder body and welded with the second feeding hole, a small opening of a screen is formed in the lower portion of the side face of the lower end of the second main cylinder body and welded with the second liquid discharge pipe, and a second short support is welded nearby the second liquid discharge pipe; a small opening is formed in the upper portion of the side face of the upper end of the second main cylinder body and is welded with the second liquid inlet pipe, and a large opening is formed in the lower portion of the side face of the upper end of the second main cylinder body and is welded with the second discharge hole;

the structure of the second spiral rotor is the same as that of the first spiral rotor; the structure of the second upper shaft seat is the same as that of the first upper shaft seat; the structure of the second lower shaft seat is the same as that of the first lower shaft seat; the type of the second speed reduction motor is the same as that of the first speed reduction motor; the structure of the second short support is the same as that of the first short support;

the materials in the rinsing unit move according to the following flow: clear water is injected into the second main cylinder body through the second liquid inlet pipe, flows downwards in an inclined mode, is mixed and stirred with the filter material, and then is discharged into a waste liquid pool through the second liquid discharge pipe; the filter material enters the second main cylinder body from the second feeding hole, is conveyed obliquely upwards through the second spiral rotor and is mixed and stirred with clear water, and the rinsed filter material enters the third feeding hole of the drying unit from the second discharging hole;

the drying unit includes: the third speed reducing motor, a third lower shaft seat, a third feeding port, a third main cylinder, a third spiral rotor, an axial flow fan, a third upper shaft seat, a third discharging port, a third short support and a heating and insulating layer; the drying unit is used for heating and drying the filter material in the spiral conveying process so as to facilitate the purpose of smooth screening of the next process;

the third main cylinder body is a long cylinder which is obliquely arranged, flanges are arranged at two ends of the third main cylinder body, and the third main cylinder body is connected with a third upper shaft seat and a third lower shaft seat through bolts; a large opening is formed above the side face of the lower end of the third main cylinder and is welded with the third feeding port, and a third short support is welded below the side face of the lower end of the third main cylinder; a large screen opening is formed above the side surface of the upper end of the third main cylinder and connected with the axial flow fan, and a large opening is formed below the side surface of the upper end of the third main cylinder and welded with the third discharge hole;

the structure of the third screw rotor is the same as that of the first screw rotor; the structure of the third upper shaft seat is the same as that of the first upper shaft seat; the structure of the third lower shaft seat is the same as that of the first lower shaft seat; the type of the third speed reduction motor is the same as that of the first speed reduction motor; the third short support is the same as the first short support in structure; the heating and insulating layer consists of an electric heating belt and an insulating layer, wraps the outer wall of the middle part of the third main cylinder body, and is used for heating and drying the filter material in the third main cylinder body; the axial flow fan is arranged above the side surface of the upper end of the third main cylinder and used for pumping out moisture generated during drying of the filter material and accelerating the drying process;

the materials in the drying unit move according to the following flow: the filter material enters the third main cylinder from the third feeding hole at the lower part, is conveyed towards the upper part obliquely through the third spiral rotor, and enters the fourth feeding hole of the screening unit from the third discharging hole at the upper part after being heated and dried;

the sieving unit includes: the fourth speed reducing motor, a fourth lower shaft seat, a fourth feeding hole, a fourth main cylinder, a fourth spiral rotor, a fourth discharging pipe, a fourth upper shaft seat, a high support, a fourth short support, a receiving groove and a material collecting plate; the screening unit is used for screening and separating the filter materials according to the size of particles in the spiral conveying process;

the fourth main cylinder is a screen cylinder which is obliquely arranged, two end faces of the fourth main cylinder are flanges, and the fourth main cylinder is connected with a fourth upper shaft seat and a fourth lower shaft seat through bolts; a large opening is formed in the upper portion of the side face of the lower end of the fourth main cylinder body and is welded with the fourth feeding hole, and a fourth short support is welded below the large opening; an opening below the side face of the upper end of the fourth main cylinder is welded with the fourth discharge pipe; a plurality of groups of small holes are sequentially processed on the lower semi-cylinder wall in the middle of the fourth main cylinder body from bottom to top according to the size from small to large to form a screen structure, and the screen structure is matched with the material collecting plates on the outer side in a grouping manner to realize the function of screening sand materials in groups according to the size;

the structure of the fourth screw rotor is the same as that of the first screw rotor; the structure of the fourth upper shaft seat is the same as that of the first upper shaft seat; the structure of the fourth lower shaft seat is the same as that of the first lower shaft seat; the type of the fourth speed reduction motor is the same as that of the first speed reduction motor; the structure of the fourth short support is the same as that of the first short support;

the material collecting plates are a plurality of plates with edges at two sides, are welded at the boundary of two groups of screen holes on the lower side surface of the fourth main cylinder body and are used for collecting filter materials with the same size and preventing the filter materials from being mixed together during screening; the fourth discharge pipe is a short and thick pipe, is welded below the side face of the upper end of the fourth main cylinder body and is used for discharging the coarsest material; the material receiving grooves are rectangular grooves with a plurality of belt wheels at the lower parts, are placed below the fourth main cylinder body and are used for collecting filter materials with different sizes in a classified mode; the high support is a high cylindrical seat, the upper end of the high support is welded on the side face of the upper end of the fourth main cylinder, and the lower end of the high support is fixed on a foundation through foundation bolts and used for supporting the screening unit;

the materials in the screening unit move according to the following flow: the filter material by the fourth feed inlet gets into in the fourth main barrel, through fourth screw rotor is carried to the top that inclines, process during each group's screen hole of the middle part downside of fourth main barrel, spill according to from little to big in proper order fourth main barrel, quilt the board that gathers materials collects and corresponds connect in the silo, the maximum size filter material that does not filtered is followed the fourth discharging pipe is gone out, falls to corresponding connect in the silo.

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