Chain plate type dry-wet separation system and method

Abstract

The invention relates to the technical field of dry-wet separation devices, and discloses a chain plate type dry-wet separation system which is characterized in that a feeding device comprises a chain plate group, two driving gears and driving equipment for driving the two driving gears; the two driving gears are oppositely arranged and are respectively a feeding end gear and a discharging end gear; the chain plate group is arranged on the peripheral surfaces of the two driving gears in a linkage and sleeving manner; the chain plate group comprises a plurality of chain plates which are nested side by side, and the chain plates are vertically arranged; the extrusion device is located above the feeding device and is in clearance fit with the chain plate set moving to the position below the extrusion device. The discharging device comprises a roller brush group; the roller brush set is located beside the discharging end gear and is in clearance fit with the chain plate set moving to the discharging end gear. The feeding device is located above the feeding end gear. The system is high in structure integration degree, through side-by-side nesting and vertical design of the chain plates and function combination of the chain plates, the rigidity of the chain plates is improved, the system is suitable for more dry-wet separation working conditions of materials with ultralow water content, and the dry-wet separation working procedure is optimized by means of changes of the distance between the chain plates.

Description

Technical Field

[0001] The present invention relates to the technical field of dry-wet separation devices, and in particular to a chain plate type dry-wet separation system and method. Background Art

[0002] At present, there are two main types of mainstream dry-wet material separation equipment: spiral stacking machine and belt conveyor. These two types of equipment have their own advantages and disadvantages in practical applications, and there are also some significant problems that limit the application effect under specific working conditions.

[0003] The dry-wet separation equipment in the form of a screw stack usually uses a dynamic and static ring extrusion method for dry-wet separation. The specific operation is to put the material into a working container, and through the relative movement of the dynamic and static rings, the material is squeezed to discharge the moisture from the wet material. This equipment has been widely used in many industries, especially in the fields of sludge treatment and ore processing. However, the actual use of the screw stack has the following problems: the extrusion force is limited. In order to prevent the material from being too dry and causing the discharge port to be blocked, the extrusion force of the screw stack is usually not set too large, which makes the screw stack unsuitable for working conditions that require ultra-low moisture content. When processing materials with high moisture content, the separation effect of the screw stack may not be ideal and cannot meet the needs of certain specific applications. In addition, the dynamic and static rings of the screw stack are prone to wear during long-term operation and need to be replaced or repaired regularly, which not only increases the maintenance cost of the equipment, but may also cause production interruptions and affect production efficiency.

[0004] Belt conveyor-type dry-wet separation equipment Belt conveyor-type dry-wet separation equipment usually uses a belt conveyor to convey materials, and uses an extrusion device to discharge excess water from the materials. This type of equipment is widely used in sewage treatment, agricultural waste treatment and other fields. However, the belt conveyor also has the following problems during actual use: During the dry-wet separation process, material residues tend to stick to the belt, causing contamination of the belt surface, which not only affects the normal operation of the equipment, but may also reduce the separation effect. In order to keep the belt clean, a large amount of water or other solvents are needed to rinse it after the dry-wet separation work is completed, which not only consumes a lot of water resources, but also increases the maintenance cost of the equipment and the environmental burden. Especially in areas with tight water resources, this cleaning method is particularly unreasonable. Summary of the invention

[0005] The present invention aims to provide a chain-plate dry-wet separation system, which solves the problems of two mainstream material dry-wet separation equipment at the same time. It is not affected by the extrusion force, can be applied to ultra-low moisture content conditions, and does not need to use water or other solvents to wash the equipment, thus saving resources.

[0006] The basic scheme provided by the present invention is: a chain plate type dry-wet separation system, comprising a feeding device, an extrusion device, a feeding device and a discharging device;

[0007] The feeding device comprises a chain plate group, two driving gears and a driving device for driving the two driving gears; the two driving gears are arranged opposite to each other, and are a feeding end gear and a discharging end gear respectively; the chain plate group is sleeved on the outer peripheral surfaces of the two driving gears in a linkage manner, and the chain plate group comprises a plurality of chain plates arranged in a side-by-side nested manner, and the chain plates are arranged vertically to form an annular conveyor belt with a variable gap between the chain plates;

[0008] The extrusion device is located above the feeding device and is clearance-matched with the chain plate group moved below it;

[0009] The discharging device comprises a roller brush group and a discharging conveyor belt; the roller brush group is located beside the discharging end gear and is clearance-matched with the chain plate group moved to the discharging end gear; the discharging conveyor belt is located below the feeding device and extends from the discharging end gear to the direction of the roller brush group;

[0010] The feeding device is located above the feeding device and above the feeding end gear, and does not interfere with the extrusion device.

[0011] Based on a chain plate type dry-wet separation system, a chain plate type dry-wet separation method is also provided, the method comprising the following steps:

[0012] S100, system preparation, determine the operating parameters of each device as required; under the action of the driving device, the chain plate group moves in a circular motion outside the two driving gears, and the circular motion path includes the upper ring straight section, the discharge end gear arc section, the lower ring straight section and the feed end gear arc section; when the chain plate moves to the upper ring straight section and the lower ring straight section, the small end faces of several chain plates are arranged side by side to form a plane, and a micro gap is formed between the chain plates. When the chain plate moves to the discharge end gear arc section and the feed end gear arc section, the chain plate gap increases under the action of the tooth spacing of the driving gear; the roller brush group is started, and its brush extends into the chain plate gap that moves to the discharge end gear arc section; the extrusion device is aligned with the chain plate plane that moves to the upper ring straight section;

[0013] S200, dry-wet separation, the wet material is sent to the chain plate plane moving to the upper ring straight section through the feeding device, and the extrusion device rolls and dehydrates the wet material in this section to form dry material, wherein the water is filtered out through the micro gap between the chain plates in this section to be discharged into the water guide groove, and the dry material will continue to be gradually sent by the chain plate to the arc section of the gear at the discharge end;

[0014] S300, dry material discharge, when the chain plate moves to the arc section of the gear at the discharge end, the gap between the chain plates increases, and the dry material falls out of the material. The roller brush group cleans the dry material in the gap between the chain plates in this section and discharges the material, and the dry material is sent out from the discharge belt;

[0015] S400, the chain plate group continues to move through the lower ring straight section, the feed end gear arc section to the upper ring straight section, and turns to S200 and repeats until the dry and wet separation of all materials is completed.

[0016] The working principle and advantages of the present invention are as follows: compared with the prior art, this solution realizes the integration of equipment structure and the compounding of functions through innovative chain plate design and application, simplifies the overall structure of the dry-wet separation device, optimizes the dry-wet separation process, and significantly improves the efficiency and effect of dry-wet separation. The extrusion force that the chain plate group can withstand is several times greater than that of the common screw stacking machines on the market, which is very suitable for the dry-wet separation conditions of materials with ultra-low moisture content.

[0017] Completely different from the existing chain plate usage, this solution uses the side-by-side nesting and vertical design of the chain plates, so that the chain plate group maintains the basic function of the conveyor belt. Under the action of the tooth spacing and nesting design of the driving gear, the chain plate gap can be changed as the chain plate group moves during the feeding and discharging stages. The chain plate group also has the composite functions of filter cloth and waterless discharging. The side-by-side arrangement of the chain plate group and the micro-gap formed during the feeding stage ensure that the plane formed by the chain plates is more compact, which is conducive to efficient feeding and avoids leakage. At the same time, the compact plane plus the vertical design of the chain plates make the entire chain plate group more rigid. High, no need to consider the moisture content of the material at the discharge port to prevent the situation of failure to discharge, the extrusion pressure that can be withstood can be greater, which can make the moisture content of the material lower after treatment; on the other hand, the water is filtered through the micro gap during the extrusion dehydration process, playing the role of the filter cloth in the belt-type dry-wet separator, the device does not need to use additional filter cloth, nor does it need to clean the filter cloth, reducing the equipment maintenance process and saving costs; the gap of the chain plate group becomes larger during the discharge stage, and cooperates with the roller brush, which is conducive to improving the discharge rate, and does not require water or liquid for flushing, saving water resources. In addition, compared with the spiral extrusion of the spiral stacking machine, the composite nested chain plates of this device have no obvious mechanical wear, saving a lot of maintenance costs, and the device has a long service life.

[0018] In summary, this solution has high structural integration and high chain plate group rigidity, which is particularly suitable for ultra-low moisture content conditions, reduces equipment maintenance costs, saves water resources, and has broad application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a chain plate type dry-wet separation system provided by an embodiment of the present invention;

[0020] Figure 2 A front view of a chain plate type dry-wet separation system provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of a single chain plate provided in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a connection method of four chain plates provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a nested layout of chain plates provided in an embodiment of the present invention;

[0024] Figure 6 A partial schematic diagram of a chain plate assembly during operation provided by an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a driving gear provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following is a further detailed description through specific implementation methods:

[0027] The marks in the drawings of the specification include: feed belt 1, pressure cylinder 2, chain plate 3, chain plate connecting bolt 31, small boss 32, drive motor 4, drive gear 5, feed end gear 51, discharge end gear 52, roller brush 6, water guide trough 7, discharge belt 8, support wheel 9.

[0028] The embodiment is basically as shown in the attached Figure 1 and Figure 2 Shown: A chain plate type dry-wet separation system includes a feeding device, an extrusion device, a feeding device and a discharging device.

[0029] The feeding device includes a chain plate group, two driving gears 5 and a driving device for driving the two driving gears; the two driving gears 5 are arranged opposite to each other, namely a feed end gear 51 and a discharge end gear 52; the driving device is a motor 4, and in this embodiment, it is arranged at the feed end gear 51, which is beneficial to the layout of the device. Under the action of the driving motor 4, the driving gear 5 rotates.

[0030] The chain plate group is linked and sleeved on the outer peripheral surfaces of the two driving gears to form an arc-connected rectangular conveyor belt.

[0031] Specifically, the chain plate group includes a plurality of chain plates 3 arranged in a side-by-side manner. Figure 3 (a) and (b) are composed of two types of chain plates, and a plurality of chain plates 3 are connected by a plurality of chain plate connecting bolts 31. The four chain plates are connected in the following manner: Figure 4 As shown, the side-by-side nesting method is as follows Figure 5 As shown, the entire chain plate group is formed, and a ring conveyor belt with a spacing filter cloth function is formed; by being nested side by side, the chain plate group and the inner side of the two driving gears 5 are formed with a plurality of protrusions with spacing, which are used to be sleeved with the driving gear 5. The size of the chain plate is determined by theoretical calculation according to the specific working conditions, and the spacing of the driving wheel gear is related to the size of the chain plate, which is also obtained through calculation and demonstration, and can be applied as long as it meets the requirements of this solution.

[0032] The chain plate 3 is arranged vertically, and its length extends along the length direction of the driving gear 5. The small end faces of the chain plate 3 are closely arranged side by side to form a conveyor belt plane. When the chain plate 3 is away from the driving gear 5, a micro gap is formed between the chain plates 3. The micro gap is generally 0.4-0.6mm, preferably 0.5mm, to ensure the tightness of the plane and normal water filtration. When the chain plate 3 moves to the driving gear 5, the gap between the chain plate 3 increases under the action of the tooth spacing of the driving gear 5, which is conducive to efficient discharge.

[0033] The top of the chain plate 3 is processed with a small lateral boss 32, such as Figure 6 The small square shape shown is the small boss 32 located at the left and right edges of the top of the chain plate, which ensures that the chain plates 3 are parallel to each other and the flatness of the running plane when running in a straight section.

[0034] like Figure 7 As shown, the driving gear 5 has a multi-stage structure, which is adapted to the protrusion of the chain plate group. Specifically, the multiple teeth on the driving gear 5 are adapted and arranged according to the position and length of the chain plate connecting bolt 31, ensuring that the teeth can accurately push the connection of the chain plate 3, and the chain plate 3 can be ensured to run smoothly when the equipment is running. The arrangement of each section of teeth needs to be determined in combination with specific working conditions.

[0035] The feeding device also includes a support wheel 9, which is located between the two driving gears 5 and on the inner side of the chain plate group, and is used to support the chain plate group to ensure that the chain plate 3 will not be crushed by the pressing cylinder 2 during the transmission process; the length of the support wheel 9 extends along the length direction of the driving gear 5, and the length is not less than the chain plate 3, so as to achieve the purpose of effective support; in this embodiment, three support wheels 9 are provided, which can provide efficient support for the chain plate group of conventional length, and at the same time help to improve the stiffness of the chain plate group, so that the device can adapt to more ultra-low moisture content conditions.

[0036] The extrusion device is located above the feeding device and is clearance-matched with the chain plate group moved below the extrusion device.

[0037] Specifically, the extrusion device includes a pressing cylinder 2, which is controlled by a corresponding control system to press and dehydrate the material downward, and the specific force of the extrusion device is determined by the working conditions. Since the rigidity of the chain plate group of this solution is improved, compared with the existing equipment, the extrusion force of the pressing cylinder 2 in this system can be 1-10 MPa, which can be greater than the 0.1-0.3 MPa of the common screw stacking machine on the market. Based on this, a material with an ultra-low moisture content of 10-40% can be obtained.

[0038] The discharging device comprises a roller brush assembly and a discharging belt 8 , and also comprises a water guide trough 7 .

[0039] Specifically, Figure 2As shown, the roller brush group is located next to the discharge end gear 52, and is gap-matched with the chain plate group moved to the discharge end gear 52; in this embodiment, the roller brush group includes a plurality of roller brushes 6 arranged along the length direction of the discharge end drive gear 5. In this embodiment, there are 3 roller brushes, ensuring that the entire length of the chain plate 3 can be covered to achieve an efficient cleaning effect; the plurality of roller brushes 6 are arranged perpendicular to the discharge end drive gear 5 with an axis, and the bristles on the roller brush 6 are also evenly arranged along the axis of the roller brush 6 to improve the cleaning effect.

[0040] The discharge belt 8 is located below the feeding device, extending from the discharge end gear 52 toward the roller brush group, and the feed port of the discharge belt 8 exceeds the discharge end gear 52 to ensure that when the gap between the chain plate 3 and the discharge end gear 52 becomes larger, the discharge material can be efficiently collected to prevent dry materials from falling outside the discharge belt 8.

[0041] The water guide groove 7 has an inclination angle of 1-5°, preferably 1.5°, and is located below the feeding device, wherein the height of one end of the water guide groove 7 on the side of the driving gear 5 at the discharge end is greater than the height of the other end on the side of the driving gear 5 at the feed end, which helps to quickly discharge excess water, and the water guide groove 7 is located at one end on the side of the driving gear 5 at the discharge end, which is actually located on the front side of the arc section (away from the direction of the roller brush group). After extrusion, the dry material is transmitted by the chain plate group and will fall into the discharge belt 8. Because the water guide groove 7 is located on the front side of the arc section, a large amount of material will not fall from the chain plate from here into the water guide groove, ensuring that the material falls into the discharge belt 8.

[0042] The feeding device is located above the feeding device and above the feeding end gear, and has no interference with the extrusion device.

[0043] Specifically, the feeding device can be a feeding belt 1, such as Figure 2 As shown, the discharge port of the feed belt 1 is aligned with the first three chain plates 3 located in the straight section of the upper ring to ensure that the material is effectively delivered to the chain plates 3 and to prevent the material from falling directly from the larger gap between the chain plates in the arc section of the feed end gear 51.

[0044] Based on the above-mentioned chain plate type dry-wet separation system, a chain plate type dry-wet separation method is provided, comprising the following steps:

[0045] S100, system preparation, determine the parameters of each device as required; under the action of the driving device, the chain plate group moves in a circular motion on the outside of the two driving gears (such as Figure 2 The direction indicated by the arrow) runs smoothly;

[0046] The path of the circular movement includes the upper ring straight section, the discharge end gear arc section, the lower ring straight section and the feed end gear arc section; when the chain plate moves to the upper ring straight section and the lower ring straight section, the small end faces of several chain plates are arranged side by side to form a plane, and a micro gap is formed between the chain plates. When the chain plate moves to the discharge end gear arc section and the feed end gear arc section, the chain plate gap increases under the action of the tooth spacing of the driving gear, and the gap changes smoothly and normally during the process;

[0047] The roller brush group is started, and its bristles can extend into the gap between the chain plates that move to the arc section of the gear at the discharge end, and fit with the surface of the chain plate 3;

[0048] The extrusion device is aligned and moved to the chain plate plane of the upper ring straight section; the extrusion force is set by the corresponding control system of the pressing cylinder. The extrusion force of multiple pressing cylinders is conventionally set to the same, and can also be set to different according to different working conditions and material moisture content. For example, along the feeding direction, the extrusion force of the pressing cylinder is gradually reduced, and the moisture content of the material is gradually reduced under the extrusion of the front pressing cylinder. The extrusion force of the rear pressing cylinder can be appropriately reduced, which can meet the moisture content requirements of the dry material while reducing the energy consumption of the system.

[0049] In this embodiment, the wet material is straw fragments soaked in biogas slurry with a moisture content of about 70%. The working conditions are set as follows: the outer diameter of the driving wheel is 45 mm, the driving gear speed is 8 s / r, the roller brush speed is set to 500 r / min, and the pressing force of the pressing cylinder is set to 1 MPa.

[0050] S200, dry-wet separation, the wet material is sent to the chain plate plane that moves to the upper ring straight section through the feeding device, and starts to move to the discharge end. The extrusion device crushes and dehydrates the material in this section, and the material is squeezed and spread on the plane. The chain plates are densely arranged to form a plane, which will not cause a large amount of material to fall from the gap. At the same time, water is filtered out through the micro gaps between the chain plates in this section to the water guide trough for discharge to form dry material, and the dry-wet separation of the material is completed in the upper ring straight section. The chain plate here plays the role of the belt and filter cloth in the traditional belt filter press as a component; among them, after filtering the water, the upper ring straight section will pass through the lower ring straight section and then to the water guide trough. The chain plate of the lower ring straight section will not affect the feeding because the material to be separated itself is highly water-containing.

[0051] S300, dry material discharge, the dry material will continue to be gradually sent to the arc section of the discharging end gear by the chain plate. When the chain plate moves to the arc section of the discharging end gear, the gap between the chain plates increases, and the dry material on the plane of the chain plate 3 falls and is discharged to the discharging belt 8. The inside of the chain plate 3 is cleaned by the roller brush 6, and some material residues that fall into the gap between the chain plates 3 are cleaned and enter the discharging belt 8.

[0052] In this embodiment, under the current setting conditions, the moisture content of the dry material can reach 25%, which improves the performance of lower moisture content of the dry material compared with the existing equipment.

[0053] S400, the chain plate group continues to move through the lower ring straight section, the feed end gear arc section to the upper ring straight section, and turns to S200 and repeats until the dry and wet separation of all materials is completed.

[0054] The chain plate type dry-wet separation system and method provided in this embodiment proposes a completely different way of using the existing chain plates, with a high degree of device structure integration and multiple functions, and optimizes the dry-wet separation process. Through the side-by-side nesting and vertical design of the chain plates, under the action of the tooth spacing of the driving gear, the gap between the chain plates changes with the movement of the chain plates from feeding to discharging; the micro-gap in the feeding stage, on the one hand, ensures that the plane formed by the chain plates is more compact, which is conducive to efficient feeding and avoiding leakage, and at the same time, the compact plane plus the vertical design of the chain plates make the entire chain plate group more rigid and can withstand greater extrusion pressure, without considering the water content of the material at the discharge port to prevent the situation where the material cannot be discharged, so that the moisture content of the material after treatment is lower, which is suitable for ultra-low moisture content conditions; on the other hand, the micro-gap plays the role of filter cloth in the belt-type dry-wet separator, reducing the use of filter cloth, and at the same time, it is not necessary to use a large amount of liquid to wash the material residue to clean the filter cloth, reducing the equipment maintenance process and saving costs; the gap in the discharging stage becomes larger, and cooperates with the roller brush, which is conducive to improving the discharge rate, and does not require water or liquid for washing, saving water resources. In addition, compared with the spiral extrusion of the spiral stacking machine, the chain plates connected in series in this device have no obvious mechanical wear, saving a lot of maintenance costs, and are suitable for promotion and use in dry-wet separation processing.

[0055] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A chain plate type dry-wet separation system, characterized in that: It includes a feeding device, an extrusion device, a feeding device and a discharging device; The feeding device comprises a chain plate group, two driving gears and a driving device for driving the two driving gears; the two driving gears are arranged opposite to each other, and are a feeding end gear and a discharging end gear respectively; the chain plate group is sleeved on the outer peripheral surfaces of the two driving gears in a linkage manner, and the chain plate group comprises a plurality of chain plates arranged in a side-by-side nested manner, and the chain plates are arranged vertically to form an annular conveyor belt with a variable gap between the chain plates; The extrusion device is located above the feeding device and is clearance-matched with the chain plate group moved below it; The discharging device comprises a roller brush group and a discharging conveyor belt; the roller brush group is located beside the discharging end gear and is clearance-matched with the chain plate group moved to the discharging end gear; the discharging conveyor belt is located below the feeding device and extends from the discharging end gear to the direction of the roller brush group; The feeding device is located above the feeding device and above the feeding end gear, and does not interfere with the extrusion device.

2. A chain plate type dry-wet separation system according to claim 1, characterized in that: The feeding device also includes a supporting wheel, which is located between the two driving gears and inside the chain plate group.

3. A chain plate type dry-wet separation system according to claim 1, characterized in that: The inner sides of the chain plate set and the two driving gear sleeves are provided with a plurality of protrusions.

4. A chain plate type dry-wet separation system according to claim 3, characterized in that: The driving gear has a multi-section structure and is adapted to a plurality of protrusions of the chain plate set.

5. The chain plate type dry-wet separation system according to claim 1, characterized in that: The roller brush set comprises a plurality of roller brushes arranged along the length direction of the driving gear at the discharge end.

6. A chain plate type dry-wet separation system according to claim 5, characterized in that: The plurality of roller brushes are arranged perpendicularly to the drive gear at the discharge end with the axis thereof.

7. The chain plate type dry-wet separation system according to claim 1, characterized in that: The discharging device also includes a water guide groove with an inclined angle, which is located below the feeding device, wherein the height of one end of the water guide groove on the driving gear side of the discharging end is greater than the height of the other end on the driving gear side of the feeding end.

8. A chain plate type dry-wet separation method, characterized in that: Utilize the chain plate type dry-wet separation system described in claims 1-7; the method comprises the following steps: S100, system preparation, determine the operating parameters of each device as required; under the action of the driving device, the chain plate group moves in a circular motion outside the two driving gears, and the circular motion path includes the upper ring straight section, the discharge end gear arc section, the lower ring straight section and the feed end gear arc section; when the chain plate moves to the upper ring straight section and the lower ring straight section, the small end faces of several chain plates are arranged side by side to form a plane, and a micro gap is formed between the chain plates. When the chain plate moves to the discharge end gear arc section and the feed end gear arc section, the chain plate gap increases under the action of the tooth spacing of the driving gear; the roller brush group is started, and its brush extends into the chain plate gap that moves to the discharge end gear arc section; the extrusion device is aligned with the chain plate plane that moves to the upper ring straight section; S200, dry-wet separation, the wet material is sent to the chain plate plane moving to the upper ring straight section through the feeding device, and the extrusion device rolls and dehydrates the wet material in this section to form dry material, wherein the water is filtered out through the micro gap between the chain plates in this section to be discharged into the water guide groove, and the dry material will continue to be gradually sent by the chain plate to the arc section of the gear at the discharge end; S300, dry material discharge, when the chain plate moves to the arc section of the gear at the discharge end, the gap between the chain plates increases, and the dry material falls out and is discharged. At the same time, the roller brush group cleans the dry material in the gap between the chain plates in this section and discharges the dry material, and the dry material is sent out from the discharge belt; S400, the chain plate group continues to move through the lower ring straight section, the feed end gear arc section to the upper ring straight section, and turns to S200 and repeats until the dry and wet separation of all materials is completed.

9. A chain plate type dry-wet separation method according to claim 8, characterized in that: In S200, the discharge port of the feeding device is aligned with and moves to the first three chain plates on the upper ring straight section close to the discharge end gear side.

10. A chain plate type dry-wet separation method according to claim 8, characterized in that: In S200, the moisture content of the dry material after extrusion is 10-40%; and the extrusion pressure of the extrusion device is 1-10 MPa.

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