Chemical waste residue filtering treatment device

Abstract

The invention discloses a chemical waste residue filtering treatment device in the technical field of chemical waste residue filtering, which comprises supporting legs, a device body arranged on the supporting legs, a feeding hole formed in the device body, a filtering assembly arranged on the device body and communicated with the feeding hole, and a screening assembly arranged in the device body, through cooperation of the filtering assembly and the screening assembly, waste residues fed into the feeding opening are subjected to sufficient solid-liquid separation, meanwhile, the dry waste residues are kept in a dispersed state, chemical waste in the filtering cavity is scattered through the turning fan blades and turned up and down at the same time, the waste is kept in a loose state all the time, and liquid conveniently flows downwards; the waste materials are heated while being turned by the turning fan blades through the electric heating block, the solid-liquid separation efficiency is improved, it is ensured that the waste residues are loose solids after solid-liquid separation, and the dried waste residues are conveniently screened and collected through the screening part.

Description

Technical Field

[0001] The invention relates to the technical field of chemical waste residue filtering, and in particular to a chemical waste residue filtering and processing device. Background Art

[0002] In the process of chemical production, the generation of waste residues is inevitable. These waste residues often contain a large amount of solid particles and liquid components. Traditional chemical waste residue treatment methods, such as simple precipitation and filtration, often have the problem of incomplete solid-liquid separation, which makes it difficult to effectively separate the solid particles and liquid components in the waste residues, forming large lumps, which are difficult to carry out the next step of treatment. Summary of the invention

[0003] In view of the problem in the prior art that solid particles and liquid components in the waste residue are difficult to be effectively separated, forming large agglomerates, which makes it difficult to carry out the next step of treatment, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a chemical waste slag filtering and processing device, the purpose of which is to: completely separate the solid and liquid of the chemical waste slag and facilitate screening processing.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a chemical waste residue filtering and processing device, characterized in that it comprises a supporting foot, a device body arranged on the supporting foot, a feeding port arranged on the device body, a filtering component arranged on the device body and connected to the feeding port, and a screening component arranged in the device body, through the cooperation of the filtering component and the screening component, the waste residue put into the feeding port is fully separated into solid and liquid, and the dry waste residue is kept in a dispersed state; The filter assembly includes a first protective shell disposed on the device body, a filter cavity disposed in the first protective shell, a power member disposed in the filter cavity, and a linkage member disposed at the output end of the power member; The filter assembly further includes a filter plate disposed at the bottom of the filter cavity, a guide plate disposed below the filter plate, a suction member disposed on the filter cavity, and a liquid storage cavity opened in the device body and communicating with the suction member and the guide plate; The power member includes a first motor disposed in a first protective shell, an input pulley disposed at an output end of the first motor, an output pulley rotatably disposed on an inner wall of the first protective shell, and a first belt disposed between the input pulley and the output pulley to achieve a transmission connection between the input pulley and the output pulley, and the output pulley is movably connected to a linkage member; The linkage part includes a spline shaft, a screw rod arranged at the lower end of the spline shaft, and a flap fan blade arranged at the end of the screw rod; the spline shaft, the screw rod, and the flap fan blade are locked and connected in sequence, the output pulley is sleeved on the spline shaft, a slot hole consistent with the end face profile of the spline shaft is arranged at the center of the output pulley, and the top end of the spline shaft passes through the center slot hole of the output pulley and the top plate of the first protective shell in sequence; the outside of the screw rod is sleeved with an adaptive screw rod nut, and the screw rod nut is fixedly connected to the filter chamber; an electric heating block is arranged in the flap fan blade, and the electric heating block is electrically connected to an external power supply.

[0006] As a preferred solution of the chemical waste slag filtering and treatment device described in the present invention, the suction member includes an absorption tube arranged on one side of the filter chamber, the absorption tube connects the filter chamber and the liquid storage chamber, a bracket arranged in the absorption tube, and an air intake fan arranged on the bracket.

[0007] As a preferred solution of the chemical waste slag filtering and treatment device described in the present invention, the screening assembly includes a second protective shell arranged on the device body, a pulling member arranged in the second protective shell, a screening member arranged in the device body, and a collection cavity arranged on the device body and connected to the screening member.

[0008] As a preferred solution of the chemical waste slag filtering and treating device described in the present invention, the pulling member includes a second motor arranged in the second protective shell, a threaded sleeve arranged on the inner wall of the second protective shell, a second belt arranged at the output end of the second motor and the threaded sleeve, a stud arranged in the threaded sleeve and threadedly matched with the threaded sleeve, a limiting shaft arranged on the second protective shell, a pulling frame slidably arranged on the filter plate, the pulling frame is fixedly connected to the stud and the stud, and a cleaning shaft arranged on the outer wall of the pulling frame and matched with the filter plate.

[0009] As a preferred solution of the chemical waste slag filtering and treatment device described in the present invention, the screening element includes a screening cavity opened in the device body, a screening plate arranged in the screening cavity, a collision block arranged below the screening plate, a movable spring arranged between the screening plate and the collision block, and limit plugs arranged on both sides below the screening plate, and the limit plugs are movably connected to the collision block.

[0010] As a preferred solution of the chemical waste slag filtering and treatment device described in the present invention, the sieve plates are arranged obliquely in the sieve chamber, and multiple groups are arranged in the vertical direction, and the aperture of the upper sieve chamber is larger than the aperture of the lower sieve chamber.

[0011] The beneficial effects of the present invention are as follows: waste material put into the filter chamber is filtered by the filter plate, and at the same time, the chemical waste in the filter chamber is broken up and flipped up and down in coordination with the flipping fan blades, so that the waste material is always kept in a loose state, which facilitates the downward flow of liquid; the waste material is heated while the flipping fan blades are flipping the waste material by the electric heating block, thereby improving the solid-liquid separation efficiency and ensuring that the waste residue is a loose solid after solid-liquid separation; the dry waste residue can be conveniently screened and collected by the screening element. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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. Among them: Figure 1 It is a schematic diagram of the overall structure of the chemical waste slag filtering and processing device of the present invention.

[0013] Figure 2 It is a schematic diagram of the back structure of the chemical waste slag filtering and processing device of the present invention.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the first protective shell of the chemical waste slag filtering and processing device of the present invention.

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the filter chamber of the chemical waste slag filtering and processing device of the present invention.

[0016] Figure 5 The present invention is a schematic diagram of the connection structure between the screw nut and the screw of the chemical waste slag filtering and processing device.

[0017] Figure 6 It is a schematic diagram of the cross-sectional structure of the screw nut of the chemical waste slag filtering and processing device of the present invention.

[0018] Figure 7 It is a schematic diagram of the cross-sectional structure of the flapping fan blades of the chemical waste slag filtering and processing device of the present invention.

[0019] Figure 8 It is a schematic structural diagram of the suction component of the chemical waste slag filtering and processing device of the present invention.

[0020] Fig. 9 It is a schematic diagram of the cross-sectional structure of the second protective shell of the chemical waste slag filtering and processing device of the present invention.

[0021] Fig.10 For the present invention Fig. 9 A magnified view of the structure in the middle.

[0022] Fig.11It is a structural schematic diagram of the material pulling frame of the chemical waste slag filtering and processing device of the present invention.

[0023] Fig.12 For the present invention Fig. 9 Enlarged view of the structure at point B in the middle.

[0024] Reference numerals: 100, support foot; 200, device body; 300, feed port; 400, filter assembly; 401, first protective shell; 402, filter chamber; 403, power member; 403a, first motor; 403b, input pulley; 403c, first belt; 403d, output pulley; 404, linkage member; 404a, spline shaft; 404b, screw rod; 404c, screw rod nut; 404e, flip fan blade; 404f, electric heating block; 405, filter plate; 406, guide plate; 407, suction member; 407 a, absorption tube; 407b, bracket; 407c, suction fan; 408, liquid storage chamber; 500, screening component; 501, second protective shell; 502, pulling member; 502a, second motor; 502b, threaded sleeve; 502c, second belt; 502d, stud; 502e, limit shaft; 502f, pulling frame; 502g, cleaning shaft; 503, screening member; 503a, screening chamber; 503b, screening plate; 503c, collision block; 503d, movable spring; 503e, limit plug plate; 504, collecting chamber. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a chemical waste residue filtering and processing device, the device includes a support leg 100 for supporting the device, a device body 200 arranged on the support leg 100, which is a frame for the entire device, a feeding port 300 arranged on the device body 200, which is an inlet for adding waste materials, and a cover can be provided on the feeding port 300 to prevent waste residue from flying out when the device is operating, a filtering component 400 arranged on the device body 200 and connected to the feeding port 300, which is used for solid-liquid separation of the waste materials, and a screening component 500 arranged in the device body 200, which is used for screening and collecting the waste residue after being processed by the feeding port 300. Through the cooperation of the filtering component 400 and the screening component 500, the waste residue put into the feeding port 300 is fully separated from the solid and liquid, and the dry waste residue is kept in a dispersed state.

[0030] Among them, the filter component 400 includes a first protective shell 401 arranged on the device body 200, which is used to protect the power part 403 and prevent debris from entering and causing problems in the operation of the power part 403. The first protective shell 401 is provided with heat dissipation holes for heat dissipation of the power part 403, a filter cavity 402 arranged in the first protective shell 401, which is used for solid-liquid separation of waste materials, a power part 403 arranged in the filter cavity 402, which is used to generate power for the linkage part 404 to operate, and a linkage part 404 arranged at the output end of the power part 403, which is used to turn over and heat the waste materials to promote solid-liquid separation.

[0031] Among them, the filter assembly 400 also includes a filter plate 405 arranged at the bottom of the filter chamber 402, for discharging the filtered liquid through the filter plate 405, a guide plate 406 arranged below the filter plate 405, a suction piece 407 arranged on the filter chamber 402 for guiding the discharged liquid, for collecting small droplets generated by heating the waste, and a liquid storage chamber 408 opened in the device body 200 and connected to the suction piece 407 and the guide plate 406, for collecting the discharged waste liquid. A drain valve is arranged at the lower part of the liquid storage chamber 408, which can be connected to a drainage pipe.

[0032] Furthermore, the screening assembly 500 includes a second protective shell 501 arranged on the device body 200, which is used to protect the operation of the pulling member 502, a pulling member 502 arranged in the second protective shell 501, which is used to transfer the waste in the filter chamber 402 to the screening member 503 and clean the filter holes on the filter plate 405, a screening member 503 arranged in the device body 200, which is used to screen and collect waste residues, and a collection chamber 504 arranged on the device body 200 and connected to the screening member 503, which is used to collect waste residues.

[0033] During use, when the staff puts the waste material into the filter chamber 402 from the feed port 300, the power member 403 drives the linkage member 404 to move, heats and turns the waste residue, and the waste liquid flows out from the filter plate 405 and flows into the liquid storage chamber 408 through the guide plate 406. At this time, the heated and gasified waste liquid enters the liquid storage chamber 408 through the suction member 407; When the solid-liquid separation of the waste residue is completed, the power part 403 drives the linkage part 404 to move to the top. At this time, the pulling part 502 pulls the waste residue in the filter chamber 402 into the screening part 503, and cleans the filter holes of the filter plate 405. At this time, the waste residue is screened according to the diameter through the screening part 503 and enters the corresponding collection chamber 504, waiting for the staff to come and transport it.

[0034] Example 2, reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the waste residue is thoroughly separated from the solid and liquid and the waste residue is kept in a loose state.

[0035] Compared with Example 1, further, the power member 403 includes a first motor 403a arranged in the first protective shell 401, which is used to generate power, an input pulley 403b arranged at the output end of the first motor 403a, an output pulley 403d rotatably arranged on the inner wall of the first protective shell 401, and a first belt 403c arranged between the input pulley 403b and the output pulley 403d to realize a transmission connection between the input pulley 403b and the output pulley 403d, and the output pulley 403d is movably connected to the linkage member 404; wherein, the first motor 403a is started, and power is input to the input pulley 403b through the output end, and the power is further transmitted to the output pulley 403d through the first belt 403c, and the output pulley 403d is connected to the linkage member 404 as the final output unit of the power member 403, so as to drive the linkage member 404 to move.

[0036] The linkage 404 includes a spline shaft 404a, a screw rod 404b disposed at the lower end of the spline shaft 404a, and a flap blade 404e disposed at the end of the screw rod 404b. The spline shaft 404a, the screw rod 404b, and the flap blade 404e are sequentially locked and connected, the output pulley 403d is sleeved on the spline shaft 404a, and a slot hole consistent with the end face profile of the spline shaft 404a is disposed at the center of the output pulley 403d, and the top end of the spline shaft 404a sequentially penetrates the central slot hole of the output pulley 403d and the top plate of the first protective shell 401; further, the outer portion of the screw rod 404b is sleeved with an adapted screw nut 404c, and the screw nut 404c is fixedly connected to the filter chamber 402. With such arrangement, the power of the power member 403 is outputted by the output pulley 403d and then transmitted to the spline shaft 404a, the screw rod 404b, and the flipping blade 404e. The spline shaft 404a, the screw rod 404b, and the flipping blade 404e rotate synchronously with the output pulley 403d, and through the cooperation of the screw rod 404b and the screw nut 404c, the spline shaft 404a, the screw rod 404b, and the flipping blade 404e can move up and down during the rotation process, thereby comprehensively flipping the waste. Further explanation, the cooperation of the screw rod 404b and the screw nut 404c is the prior art, that is, through the rotation of one side, it can synchronously perform linear motion relative to the other side, and the trajectory of the linear motion is the axial direction of the screw rod 404b. Furthermore, an electric heating block 404f is provided in the flapping blade 404e, and the electric heating block 404f is electrically connected to an external power source for heating the waste material and promoting solid-liquid separation of the waste residue.

[0037] Among them, the suction member 407 includes an absorption tube 407a arranged on one side of the filter chamber 402, the absorption tube 407a connects the filter chamber 402 and the liquid storage chamber 408, and is used for the evaporated waste liquid to enter the liquid storage chamber 408, a bracket 407b arranged in the absorption tube 407a, and is used to support the suction fan 407c, and the suction fan 407c is arranged on the bracket 407b. The suction member 407 is electrically connected to an external power supply for collecting evaporated waste liquid.

[0038] During use, when the staff puts the waste material into the filter chamber 402 from the feeding port 300, a part of the waste liquid is affected by gravity and flows downward through the filter plate 405 to be discharged. At this time, the first motor 403a starts, driving the flipping fan blade 404e to rotate and move up and down, and comprehensively flipping the waste residue. At the same time, the electric heating block 404f is used to heat the flipped waste material to further promote the solid-liquid separation of the waste residue. At this time, a part of the waste liquid is heated by the electric heating block 404f and vaporized into a steam state. At this time, the bracket 407b attracts the vaporized waste liquid and enters the liquid storage chamber 408 through the absorption tube 407a. When the solid-liquid separation operation is completed, the flipping fan blade 404e is raised to the top by the first motor 403a, waiting for the pulling member 502 to perform the next operation.

[0039] The remaining structures are the same as those of Example 1.

[0040] Example 3, reference Figure 1 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that the loose waste residue is screened and collected.

[0041] Compared with Example 2, further, the pulling member 502 includes a second motor 502a disposed in the second protective shell 501, which is used to generate power and rotate the threaded sleeve 502b disposed on the inner wall of the second protective shell 501, a second belt 502c disposed at the output end of the second motor 502a and on the threaded sleeve 502b, which is used for transmission, and the threaded sleeve 502b is driven to rotate by the rotation of the second motor 502a, and a stud 502d disposed in the threaded sleeve 502b and threadedly matched with the threaded sleeve 502b, which is used for the threaded sleeve 502b to rotate and drive the stud 502d to move forward and backward. , a limiting shaft 502e is arranged on the second protective shell 501, which is used for limiting and sliding the pulling frame 502f arranged on the filter plate 405, which is used to cooperate with the stud 502d to pull the waste residue in the filter chamber 402 into the screening element 503, the pulling frame 502f and the stud 502d and the stud 502d are fixedly connected, and a cleaning shaft 502g is arranged on the outer wall of the pulling frame 502f and cooperates with the filter plate 405, which is used to pull the pulling frame 502f, and the cleaning shaft 502g cooperates with the filter plate 405 to rotate, so as to clean the filter holes on the filter plate 405, so as to facilitate the next filtering operation.

[0042] Among them, the screening element 503 includes a screening chamber 503a opened in the device body 200, a screening plate 503b arranged in the screening chamber 503a, a collision block 503c arranged below the screening plate 503b for screening waste residues, a movable spring 503d used to abut against the screening plate 503b and arranged between the screening plate 503b and the collision block 503c, used to drive the screening plate 503b to move up and down when the screening plate 503b is subjected to pressure, and limiting plug plates 503e arranged on both sides below the screening plate 503b, used to limit the moving direction of the screening plate 503b so that the screening plate 503b can only move up and down, and the limiting plug plates 503e are movably connected with the collision block 503c.

[0043] Among them, the screening plate 503b is set obliquely in the screening chamber 503a, and the waste residue is moved by gravity without staying on the screening plate 503b. In addition, multiple groups are arranged in the vertical direction. The aperture of the upper screening chamber 503a is larger than the aperture of the lower screening chamber 503a, which is convenient for screening waste residue particles of different diameters.

[0044] During use, when the solid-liquid separation operation is completed, the second motor 502a is started, driving the threaded sleeve 502b to rotate, and driving the pulling frame 502f to move into the screening chamber 503a through the stud 502d. At this time, as the pulling frame 502f moves, the cleaning shaft 502g rotates to clean the filter plate 405. When the waste residue enters the screening chamber 503a, the waste residue falls onto the screening plate 503b. Under the action of gravity, large particles of waste residue roll into the collecting chamber 504. At this time, the screening plate 503b is impacted by the falling waste residue, and moves up and down through the movable spring 503d to accelerate the rolling of large particles of waste residue. At this time, small particles of waste residue pass through the screening plate 503b and enter the screening plate 503b of the next layer for the next screening.

[0045] The remaining structure is the same as that of Example 2.

[0046] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0047] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A chemical waste residue filtering and processing device, characterized in that: The device comprises a supporting foot, a device body disposed on the supporting foot, a feeding port disposed on the device body, a filtering component disposed on the device body and communicating with the feeding port, and a screening component disposed in the device body; The filter assembly includes a first protective shell disposed on the device body, a filter cavity disposed in the first protective shell, a power member disposed in the filter cavity, and a linkage member disposed at the output end of the power member; The filter assembly further includes a filter plate disposed at the bottom of the filter cavity, a guide plate disposed below the filter plate, a suction member disposed on the filter cavity, and a liquid storage cavity opened in the device body and communicating with the suction member and the guide plate; The power member includes a first motor disposed in a first protective shell, an input pulley disposed at an output end of the first motor, an output pulley rotatably disposed on an inner wall of the first protective shell, and a first belt disposed between the input pulley and the output pulley to achieve a transmission connection between the input pulley and the output pulley, and the output pulley is movably connected to a linkage member; The linkage part includes a spline shaft, a screw rod arranged at the lower end of the spline shaft, and a flap fan blade arranged at the end of the screw rod; the spline shaft, the screw rod, and the flap fan blade are locked and connected in sequence, the output pulley is sleeved on the spline shaft, a slot hole consistent with the end face profile of the spline shaft is arranged at the center of the output pulley, and the top end of the spline shaft passes through the center slot hole of the output pulley and the top plate of the first protective shell in sequence; the outside of the screw rod is sleeved with an adaptive screw rod nut, and the screw rod nut is fixedly connected to the filter chamber; an electric heating block is arranged in the flap fan blade, and the electric heating block is electrically connected to an external power supply.

2. The chemical waste slag filtering and processing device according to claim 1 is characterized in that: The suction member comprises an absorption tube arranged at one side of the filter cavity, the absorption tube communicates with the filter cavity and the liquid storage cavity, a bracket arranged in the absorption tube, and an air suction fan arranged on the bracket.

3. The chemical waste slag filtering and processing device according to claim 2 is characterized in that: The screening assembly includes a second protective shell arranged on the device body, a pulling member arranged in the second protective shell, a screening member arranged in the device body, and a collection cavity arranged on the device body and connected with the screening member.

4. The chemical waste residue filtering and processing device according to claim 3 is characterized in that: The pulling member includes a second motor arranged in the second protective shell, a threaded sleeve arranged on the inner wall of the second protective shell, a second belt arranged at the output end of the second motor and the threaded sleeve, a stud arranged in the threaded sleeve and threadedly matched with the threaded sleeve, a limiting shaft arranged on the second protective shell, a pulling frame slidably arranged on the filter plate, the pulling frame is fixedly connected to the stud and the stud, and a cleaning shaft arranged on the outer wall of the pulling frame and matched with the filter plate.

5. The chemical waste residue filtering and processing device according to claim 4 is characterized in that: The screening element includes a screening cavity opened in the device body, a screening plate arranged in the screening cavity, a collision block arranged below the screening plate, a movable spring arranged between the screening plate and the collision block, and limiting plug plates arranged on both sides below the screening plate, and the limiting plug plates are movably connected to the collision block.

6. The chemical waste residue filtering and processing device according to claim 5 is characterized in that: The screening plates are arranged obliquely in the screening chamber, and multiple groups are arranged in the vertical direction. The aperture of the upper screening chamber is larger than the aperture of the lower screening chamber.

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