Fine sand washing and separating device with anti-disturbance function

Abstract

The fine sand washing and separating device with the anti-disturbance function comprises a conical separator and a fluidization cavity connecting piece, the conical separator comprises a conical shell and an anti-disturbance stirring piece, an annular water outlet weir plate is arranged on the top of the shell, a water inlet pipe is tangentially connected to the outer edge face of the shell, and a water outlet pipe is arranged on the outer edge face of the shell. And the anti-disturbance stirring piece is hoisted at the top of the conical separator and extends into the fluidization cavity connecting piece arranged at the bottom of the shell. According to the fine sand washing and separating device with the anti-disturbance function, the water outlet weir plate is arranged at the top of the shell, water flow with fine sand removed is subjected to backflow and guiding out, stirring is conducted through the anti-disturbance stirring part in the middle of the shell to form vortex, and the phenomenon that internal sand and stones are deposited and hardened is avoided; and mutual friction among sand grains can promote effective separation of organic impurities adhered to the surface from the non-polar particles.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and more specifically to a fine sand washing and sand separation device with an anti-disturbance function. Background Art

[0002] High concentration of inorganic sand particles is one of the prominent characteristics of urban sewage in my country. Sand particles with a particle size >75 microns are usually deposited at the bottom of pipes or sewage treatment structures, requiring human intervention for treatment.

[0003] Sewage treatment plants usually use grit chambers and sand-water separators to remove sand from sewage. The sand deposited in the pipes is collected and transported by mechanical suction and then disposed of as a resource through sand washing and separation devices.

[0004] The above-mentioned sand-water separation device and sand washing and sand separation device are mainly designed for sand particles with a diameter of >200 microns and a relative specific gravity of 2.65. Lack of attention is paid to the removal effect of sand particles with a particle size of <200 microns, resulting in serious loss of fine sand with a diameter of 75-200 microns during the sand washing and sand separation process, which cannot be effectively separated, resulting in fine sand accumulation in subsequent structures or pipelines and equipment being worn by fine sand.

[0005] A sand washing and sand separation device is disclosed in Chinese patent applications CN219051646, CN219898510, and CN209155197, which mainly includes a conical separation structure, a spiral conveying structure, and a fluidized stirring structure. However, 1. The feed part and the water outlet part of the conical separation part are both located at the top of the conical separation structure, and short-circuit is easily generated during the feeding process, resulting in the feed failing to enter the lower half of the separation structure to complete effective separation, thereby reducing the separation efficiency; 2. The device mainly stirs the sand deposited at the bottom of the conical separation structure to form a fluidized bed friction effect. In this process, the sand is inevitably re-suspended by the flushing and stirring of the fluidized stirring structure, and then re-suspended from the bottom of the separation structure into the middle and upper part, and then may be entrained by the short-circuit in the feed into the water outlet, or lost from the slag discharge pipe in the middle, thereby reducing the separation efficiency.

[0006] Therefore, the main purpose of the present invention is to optimize the flow pattern of the water flow inside the conical separation structure to avoid short-circuiting and to improve the internal components of the separation structure to prevent the sand particles from being re-suspension during the fluidized stirring process. Summary of the invention

[0007] The present invention provides a fine sand washing and separation device with an anti-disturbance function, in order to optimize the water flow state inside the sand washing and separation equipment to avoid short-flow, improve the internal components of the sand washing and separation equipment to prevent the sand particles from being re-suspension during the fluidized stirring process, thereby achieving the interception and separation effect for 75-200 micron fine sand.

[0008] According to one aspect of the present invention, there is provided a fine sand washing and sand separation device with an anti-disturbance function, comprising a conical separator and a fluidizing chamber connector, the conical separator comprising a conical shell and an anti-disturbance agitator, an annular water outlet weir plate is installed on the top of the shell, the outer edge surface of the shell is tangentially connected to the water inlet pipe, the anti-disturbance agitator is hoisted on the top of the conical separator and extends into the fluidizing chamber connector installed on the bottom of the shell.

[0009] Preferably, based on the above scheme, the shell includes a cylindrical connecting portion and a conical cone portion, the connecting portion is connected to the fluidizing chamber connecting piece through the cone portion, the water inlet pipe is tangentially connected to the outer edge surface of the connecting portion; the water outlet weir plate is installed on the connecting portion.

[0010] Preferably, based on the above scheme, the water outlet weir plate includes an outer plate, an inner plate and a bottom plate, the outer plate is connected to the inner plate through the bottom plate to form a water outlet weir, the height of the outer plate is greater than the height of the inner plate, and the connection between the inner plate and the bottom plate extends downward to form a conical inward-turned anti-shortflow plate.

[0011] Preferably, based on the above scheme, the anti-disturbance stirring element includes a mounting frame, an anti-disturbance barrel and a stirring shaft, the mounting frame is mounted on the top of the conical separator, the anti-disturbance barrel is mounted on the mounting frame, and the stirring shaft driven by a stirring motor is mounted on the mounting frame, the stirring shaft is passed through the anti-disturbance barrel and extends into the fluidization chamber connector, the bottom of the anti-disturbance barrel extends outward to form a conical anti-disturbance cone cover, and the diameter of the inward-turned anti-short flow plate is smaller than the diameter of the inner enclosure plate.

[0012] The fluidizing chamber connector is provided with a cylindrical shaped cavity, and an annular fluidizing pipe is coaxially arranged in the cylindrical shaped cavity, and a booster nozzle is arranged on the annular fluidizing pipe. Preferably, based on the above scheme, a plurality of stirring paddles are arranged on the stirring shaft in the fluidizing chamber connecting piece, the stirring paddles are arranged at intervals, and each of the stirring paddles includes at least 5 arc-shaped stirring blades, and the stirring blades are evenly spaced on the stirring shaft.

[0013] Preferably, based on the above solution, a pressure balancing port is provided on the anti-disturbance barrel close to the motor side.

[0014] Preferably, based on the above scheme, it further comprises a U-shaped spiral sand lifting auger, and the spiral sand lifting auger is connected with the sand outlet of the conical separator through the fluidizing chamber connector.

[0015] Preferably, based on the above scheme, the spiral sand lifting auger is arranged in an inclined shape, and a flushing pipe is arranged in the spiral sand lifting auger.

[0016] The present invention provides a fine sand washing and sand separation device with an anti-disturbance function. A water outlet weir plate is installed on the top of the shell to realize the backflow and discharge of the water flow after the fine sand is removed, and the anti-disturbance stirring piece in the middle of the shell is used to stir and form a vortex to avoid the internal sand and gravel deposition and agglomeration. At the same time, during the stirring process, the mutual friction between the sand particles can promote the effective separation of organic impurities adhered to the surface and the non-polar particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 It is a structural schematic diagram of a fine sand washing and sand separation device with an anti-disturbance function of the present invention; Figure 2 A three-dimensional diagram of a fine sand washing and sand separation device with an anti-disturbance function according to the present invention; Figure 3 Another perspective view of the fine sand washing and sand separation device with anti-disturbance function of the present invention; Figure 4 It is a cross-sectional view of the fine sand washing and sand separation device with anti-disturbance function of the present invention; Figure 5 A three-dimensional diagram of the anti-disturbance stirring member of the present invention; Description of Figure Numbers: Conical separator 1, shell 11, connecting part 112, cone part 113, anti-disturbance stirring member 12, mounting frame 121, anti-disturbance barrel 122, stirring shaft 123, anti-disturbance cone cover 124, stirring paddle 125, stirring blade 126, pressure balance port 127, stirring motor 128, water outlet weir plate 13, outer plate 131, inner plate 132, bottom plate 133, water outlet 134, water inlet pipe 14, inverted anti-short flow plate 15, slag discharge pipe 16; Fluidizing chamber connector 2, special-shaped chamber 21, annular fluidizing pipe 22, boosting nozzle 23; Spiral sand lifting auger 3, flushing pipe 31, sand discharge port 32, motor 33, emptying pipe 34; Overflow area 100, sand washing area 200, sand discharge area 300. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0020] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0021] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0022] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0025] See also Figure 1 , and combined with Figure 2 and Figure 3 As shown, a fine sand washing and sand separation device with an anti-disturbance function of the present invention comprises a conical separator 1 and a fluidizing chamber connector 2. The conical separator 1 comprises a conical shell 11 and an anti-disturbance stirring member 12. An annular water outlet weir plate 13 is installed on the top of the shell 11. The outer edge surface of the shell 11 is tangentially connected to the water inlet pipe 14. The anti-disturbance stirring member 12 is hoisted on the top of the conical separator 1 and extends into the fluidizing chamber connector 2 installed on the bottom of the shell 11.

[0026] During operation, the sand-water mixture to be treated is introduced tangentially through the water inlet pipe 14 and rotated at high speed on the inner edge surface of the shell 11. Under the action of inertia and gravity, the sand and gravel in the mixture will settle to the bottom, and the water will gather in the middle. After the water flows over the outlet weir plate 13, it is discharged. The sand and gravel deposited at the bottom can be prevented from forming a plate at the bottom and blocking the outlet under the action of the anti-disturbance stirring element 12 in the middle, and are introduced into the fluidizing chamber connector 2 and discharged outward.

[0027] Among them, the shell 11 of the present invention includes a cylindrical connecting portion 112 and a conical cone portion 113, the connecting portion 112 is connected to the fluidization chamber connecting piece 2 through the cone portion 113, and the water inlet pipe 14 is tangentially connected to the outer edge surface of the connecting portion 112; the water outlet weir plate 13 is installed on the connecting portion 112; specifically, the water outlet weir plate 13 of the present invention includes an outer plate 131, an inner enclosure plate 132 and a bottom plate 133, the outer plate 131 is connected to the inner enclosure plate 132 through the bottom plate 133 to form a water outlet weir, and a water outlet 134 is designed on the bottom plate 133 of the water outlet weir, the height of the outer plate 131 is greater than the height of the inner enclosure plate 132, and is provided on the outer plate 131; the connection between the inner enclosure plate 132 and the bottom plate 133 extends downward to form a conical inward-turned anti-short flow plate 15, and the diameter of the inward-turned anti-short flow plate 15 is smaller than the diameter of the inner enclosure plate 132. For specific structure, please refer to Figure 3 and Figure 4 shown.

[0028] It should be noted that the anti-disturbance stirring element 12 of the present invention includes a mounting frame 121, an anti-disturbance barrel 122 and a stirring shaft 123. The mounting frame 121 is mounted on the top of the conical separator 1, the anti-disturbance barrel 122 is mounted on the mounting frame 121, and the stirring shaft 123 is mounted on the mounting frame 121. The stirring shaft 123 is passed through the anti-disturbance barrel 122 and extends into the fluidizing chamber connector 2. The bottom of the anti-disturbance barrel 122 extends outward to form a conical anti-disturbance cone cover 124.

[0029] In this way, the outer edge surface of the anti-disturbance barrel 122 of the present invention, the inner enclosure 132, and the inward-turned anti-short flow plate 15 are arranged to form an overflow area 100; the outer edge surface of the anti-disturbance barrel 122 of the present invention, the inner edge surface of the cone portion 113, and the anti-disturbance cone cover 124 form a sand washing area 200; and the interior of the fluidizing chamber connector 2 forms a sand discharge area 300.

[0030] When the sand-water mixture is tangentially introduced into the connecting portion 112 through the water inlet pipe 14, the incoming water has a certain flow velocity and forms a vortex at the top of the cone portion 113. The annular weir at the top of the cone portion 113 is the only continuous drainage channel for the equipment. Therefore, two radially separated inner and outer areas are established inside the cone portion 113. In the area away from the central axis, water flows spirally downward along the inner wall of the cone portion 113. Due to the gradual reduction in the diameter of the cone portion 113, this part of the water flow is forced to converge to the bottom, and changes its flow direction when it hits the anti-disturbance cone cover 124, and becomes a rotation upward in the axial direction (i.e., the outer side spirals downward, and the inner side rotates upward).

[0031] In the above process, under the obstruction of the inward-turned anti-short flow plate 15 and the action of gravity, a spiral downward water flow will be formed along the inner wall of the cone portion 113. In the sand washing area 200, the sand particles settle to the inner wall of the cone portion 113 under the action of gravity and centrifugal force, and migrate and gather to the bottom of the cone portion 113 under the action of inertia and gravity. By adjusting the diameter and height of the cone portion 113, the sedimentation efficiency of fine sand particles can be changed in a targeted manner, thereby improving the removal efficiency of fine sand with a diameter of 75-200 microns.

[0032] Since the water inlet pipe 14 is located at the top of the cone portion 113, the axial distance between the water inlet pipe 14 and the cone cover 124 is longer than that of the top water outlet weir, and the top water outlet weir is the only continuous outflow channel, in order to prevent the upward water flow of the inner circle from disturbing the water flow near the water inlet, resulting in part of the incoming water being unable to produce a spiral downward initial flow state, and being disturbed by the radial upward water flow of the inner circle, and directly discharged from the annular water outlet weir with the upward water flow of the inner circle, the present invention designs the inward-turned anti-short flow plate 15 to have a conical structure, the diameter of the inward-turned anti-short flow plate 15 is smaller than the diameter of the inner enclosure 132, and the bottom of the inward-turned anti-short flow plate 15 extends to the boundary between the inner and outer circles of the cone portion 113 to ensure its effect.

[0033] When the water flows downward in the spiral to the bottom area of ​​the cone 113, it changes its flow direction to spiral upward under the action of the anti-disturbance cone cover 124, and flows upward around the anti-disturbance barrel 122, enters the overflow area 100 on the upper part of the inverted anti-short flow plate 15, and finally enters the drainage trough through the outlet weir plate 13 and is discharged from the drainage pipe. In this process, since the water flow maintains a spiral upward flow state, the sedimentation effect of 75-200 micron fine sand under the action of gravity is enhanced, which is conducive to the interception and sedimentation of fine sand.

[0034] The sand particles settled to the bottom of the cone portion 113 will be further gathered to the center of the cone tank under the driving force of the ring stirring generated by the stirring shaft 123, until they enter the columnar special-shaped cavity 21 of the fluidizing cavity connector 2 and accumulate in this cavity.

[0035] It should be noted that, in the present invention, a plurality of stirring paddles 125 are arranged on the stirring shaft 123 in the fluidizing chamber connector 2, the stirring paddles 125 are arranged at intervals, and each stirring paddle 125 includes at least 5 arc-shaped stirring blades 126, and the stirring blades 126 are evenly spaced on the stirring shaft 123; and in order to prevent the sand particles in the fluidizing chamber connector 2 from agglomerating and causing blockage therein, the present invention is provided with a columnar special-shaped cavity 21 in the fluidizing chamber connector 2, and an annular fluidizing pipe 22 and a booster nozzle 23 are provided in the columnar special-shaped cavity 21.

[0036] During use, since stirring shafts 123 are provided at different heights in the columnar cavity 21, as the height of the sand particles accumulated in the cavity increases, the continuous stirring of the stirring paddle will drive the sand particles to produce a flow effect, thereby preventing the sand particles from compacting and silting. During the stirring process, the mutual friction between the sand particles can promote the effective separation of organic impurities adhered to the surface from the non-polar particles.

[0037] The annular fluidizing tube 22 and the booster nozzle 23 are coaxially arranged with the columnar irregular cavity 21. The annular fluidizing tube 22 operates intermittently, and high-pressure water is sprayed into the columnar irregular cavity 21 through multiple booster nozzles 23. The direction of the water sprayed by the booster nozzle 23 is opposite to the direction of rotation of the stirring shaft 123, which will generate hydraulic disturbance, promote the re-suspension of organic impurities and fine particles eluted in the cavity, and re-enter the cone portion 113 upward from the fluidizing cavity connector 2.

[0038] At this time, due to the shielding effect of the anti-disturbance cone cover 124, most of the re-suspended organic impurities and fine particles will enter the sand discharge area 300 inside the anti-disturbance barrel 122, instead of entering the sand washing area 200 surrounded by the cone portion 113 and the inward-turned anti-short flow plate 15, thereby preventing this part of organic matter and fine sand from entering the overflow area 100 between the anti-short flow weir plate and the annular outlet weir and escaping.

[0039] Since the sand discharge area 300 formed by the columnar special-shaped cavity 21 and the anti-disturbance barrel 122 has external energy such as flushing and stirring to drive the fluid flow, and the sand washing area 200 formed by the non-conical part 113 and the inward-turned anti-short flow plate 15 is completely driven by the gravitational potential energy of the incoming material, there is a liquid level difference between the sand washing area 200 and the sand discharge area 300 during operation.

[0040] In order to balance the difference in liquid levels between the two areas, a pressure balance port 127 is provided near the top stirring motor 128 of the anti-disturbance barrel 122 to connect the fluids of the sand washing area 200 and the sand discharge area 300.

[0041] Preferably, the present invention also provides a slag discharge pipe 16 in the cone portion 113 which realizes automatic intermittent opening and closing control through an electric ball valve, which is opened with a delay after the annular fluidizing pipe 22 flushes the sand in the columnar special-shaped cavity 21, and is closed after running for a fixed time.

[0042] The slag discharge pipe 16 is connected to the sand discharge area 300 enclosed by the anti-disturbance barrel 122 to ensure the discharge of the re-suspended organic matter after flushing. The re-suspended fine sand is settled through the delayed start of the slag discharge pipe 16 and re-enters the columnar special-shaped cavity 21 to avoid escape.

[0043] Furthermore, the number of the tangentially arranged feed pipes of the present invention is greater than or equal to 1. When the number is greater than 1, the positions of the feed pipes are axisymmetric along the central axis of the cone portion 113 to improve the processing efficiency.

[0044] Please continue reading Figure 5 As shown, a plurality of stirring paddles 125 are provided on the stirring shaft 123 in the fluidizing chamber connector 2 of the present invention. The stirring paddles 125 are arranged at intervals, and each stirring paddle 125 includes at least 5 arc-shaped stirring blades 126. The stirring blades 126 are evenly spaced on the stirring shaft 123, and the outer circumferential surface diameters of each group of stirring paddles are different, and they are arranged in high and low patterns to ensure that they are adapted to the corresponding anti-disturbance barrel 122 and the inner edge surface of the columnar special-shaped cavity 21, thereby improving the stirring effect.

[0045] The present invention also includes a U-shaped spiral sand lifting auger 3, which is connected to the sand outlet of the conical separator 1 through the fluidizing chamber connector 2. The spiral sand lifting auger 3 is arranged in an inclined shape and is driven by a motor 33 to rotate the screw conveying shaft inside it, so as to lift the sand and discharge it through the sand discharge port 32. Preferably, an emptying pipe 34 is also provided on the spiral sand lifting auger 3.

[0046] When in use, the washed fine sand particles are discharged to the outside of the equipment through the sand discharge port through the continuous operation of the spiral sand lifting auger 3. The organic matter content of the discharged fine sand is significantly reduced, which is conducive to resource recycling.

[0047] Furthermore, the present invention also installs a flushing pipe 31 on the inner wall of the spiral sand lifting auger 3 for intermittent flushing to reduce the solid content of the fluid inside the spiral, thereby improving the separation efficiency, and the solid is discharged through the drain pipe 34.

[0048] The present invention provides a fine sand washing and sand separation device with an anti-disturbance function, in which a water outlet weir plate 13 is installed on the top of a shell 11 to realize the backflow and discharge of the water flow after the fine sand is removed, and stirs the water flow through an anti-disturbance stirring element 12 in the middle of the shell 11 to form a vortex to avoid the internal sand and gravel deposition and formation. At the same time, during the stirring process, the mutual friction between the sand particles can promote the effective separation of organic impurities adhered to the surface and the non-polar particles.

[0049] Finally, the method of the present application is only a preferred implementation scheme and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fine sand washing and sand separation device with anti-disturbance function, characterized in that: It includes a conical separator and a fluidizing chamber connector. The conical separator includes a conical shell and an anti-disturbance stirring piece. A ring-shaped water outlet weir is installed on the top of the shell. The outer edge surface of the shell is tangentially connected to the water inlet pipe. The anti-disturbance stirring piece is hoisted on the top of the conical separator and extends into the fluidizing chamber connector installed on the bottom of the shell.

2. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 1, characterized in that: The shell includes a cylindrical connecting portion and a conical cone portion, the connecting portion is connected to the fluidizing chamber connecting piece through the cone portion, the water inlet pipe is tangentially connected to the outer edge surface of the connecting portion; the water outlet weir plate is installed on the connecting portion.

3. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 2, characterized in that: The water outlet weir plate includes an outer plate, an inner plate and a bottom plate. The outer plate is connected to the inner plate through the bottom plate to form a water outlet weir. The height of the outer plate is greater than the height of the inner plate. The connection between the inner plate and the bottom plate extends downward to form a conical inward-turned short-flow prevention plate, and the diameter of the inward-turned short-flow prevention plate is smaller than the diameter of the inner plate.

4. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 1, characterized in that: A columnar special-shaped cavity is arranged in the fluidizing cavity connecting piece, and an annular fluidizing pipe is coaxially arranged in the columnar special-shaped cavity, and a boosting nozzle is arranged on the annular fluidizing pipe.

5. The fine sand washing and sand separation device with anti-disturbance function as claimed in claim 1, characterized in that: The anti-disturbance stirring element includes a mounting frame, an anti-disturbance barrel and a stirring shaft driven by a stirring motor. The mounting frame is mounted on the top of the conical separator, the anti-disturbance barrel is mounted on the mounting frame, and the stirring shaft is mounted on the mounting frame. The stirring shaft passes through the anti-disturbance barrel and extends into the fluidizing chamber connector. The bottom of the anti-disturbance barrel extends outward to form a conical anti-disturbance cone cover.

6. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 5, characterized in that: A plurality of stirring paddles are arranged on the stirring shaft in the fluidizing chamber connector. The stirring paddles are arranged at intervals, and each stirring paddle includes at least 5 arc-shaped stirring blades. The stirring blades are evenly arranged at intervals on the stirring shaft.

7. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 5, characterized in that: A pressure balancing port is arranged on the anti-disturbance barrel close to one side of the stirring motor.

8. The fine sand washing and sand separation device with anti-disturbance function as claimed in claim 1, characterized in that: It also includes a U-shaped spiral sand lifting auger, which is connected to the sand outlet of the conical separator through the fluidizing chamber connector.

9. A fine sand washing and sand separation device with anti-disturbance function as claimed in claim 8, characterized in that: The spiral sand lifting auger is arranged in an inclined shape, and a flushing pipe is arranged inside the spiral sand lifting auger.

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