Dredged soil dewatering and drying equipment

Abstract

The utility model relates to the technical field of dredged soil treatment equipment, in particular to dredged soil dewatering and drying equipment, which comprises a base, a drying device and a feed hopper, and further comprises a screening device arranged below the feed hopper, comprising a screening box, a supporting frame installed in the screening box through an elastic supporting piece, a vibration motor arranged at the bottom of the supporting frame, a screen and a water filtering plate, wherein the screen and the water filtering plate are vertically distributed on the supporting frame. And the extrusion dewatering device is arranged below the screening device and comprises an extrusion cylinder fixed to the base, a water filtering cylinder concentrically arranged in the extrusion cylinder, an extrusion screw rotationally installed in the water filtering cylinder and a first driving motor for driving the extrusion screw, and the end of the water filtering cylinder is connected with the drying device. The screen and the water filtering plate in the screening device are distributed up and down, so that water can be quickly discharged through the screen and the water filtering plate while the dredged soil is preliminarily screened, preliminary dehydration is realized, and the water content of the dredged soil entering a subsequent extrusion dehydration device is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of dredged soil treatment equipment, and in particular to a dredged soil dewatering and drying equipment. Background Technology

[0002] Water conservancy projects and river dredging generate a large amount of dredged soil. Currently, the secondary use of dredged soil is mostly concentrated in reclamation projects. Dredged soil usually contains a large amount of water and silt. If it is directly piled up without proper treatment, it will occupy a large amount of land resources and easily cause environmental pollution, such as soil pollution and water pollution.

[0003] Traditional methods for treating dredged soil mainly include natural drying and simple mechanical dewatering followed by direct stockpiling or landfilling. While simple mechanical dewatering followed by landfilling or stockpiling can reduce the volume of dredged soil to some extent, the dewatering effect is limited, and the dredged soil still contains a high moisture content. After landfilling, it may generate secondary pollution such as leachate, posing a potential threat to the surrounding environment.

[0004] For example, Chinese utility model patent CN217483165U discloses a sludge drying device for sludge treatment equipment. The sludge drying device is equipped with a sludge drying mechanism. A powerful motor drives the transmission shaft to rotate, the transmission shaft drives the spiral shaft to rotate, and the spiral shaft drives the sludge to rotate and move. A hot air blower blows hot air, and the air outlet conducts the hot air from the hot air blower into the drying cylinder, so that the sludge can be heated evenly. However, because the sludge contains a lot of moisture, the drying time is long and the drying efficiency is low. Utility Model Content

[0005] The purpose of this invention is to provide a dewatering and drying device for dredged soil to solve the problems mentioned in the background art.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: a dredged soil dewatering and drying device, comprising a base, a drying device, and a feeding hopper, and further comprising:

[0007] The screening device, located below the feed hopper, includes a screening box, a support frame installed in the screening box by an elastic support member, a vibrating motor located at the bottom of the support frame, and a screen and a filter plate distributed vertically on the support frame.

[0008] The extrusion dewatering device is located below the screening device and includes an extrusion cylinder fixed on the base, a filter cylinder concentrically arranged inside the extrusion cylinder, an extrusion screw rotatably installed inside the filter cylinder, and a first drive motor for driving the extrusion screw. The end of the filter cylinder is connected to the drying device.

[0009] Preferably, the screen and filter plate are both inclined inside the screening box, and the outlet of the feed hopper is located at the higher end of the feed hopper.

[0010] Preferably, the upper surface of the filter plate is provided with raised baffles, which extend horizontally and are spaced apart from top to bottom on the filter plate.

[0011] Preferably, the surface of the filter plate is provided with a first filter cloth, which covers the filter plate and the baffle.

[0012] Preferably, a pair of extrusion assemblies are provided at the lower end of the filter plate. The extrusion assembly includes a bracket fixed on both sides of the filter plate and a pair of pressure rollers mounted on the bracket. The two pressure rollers are respectively arranged on the upper and lower sides of the upper surface of the filter plate, and the surface of the pressure rollers is covered with a second filter cloth.

[0013] Preferably, the end of the water filter cylinder facing the drying device is provided with an end plate, and the end plate is provided with through holes, which connect the water filter cylinder and the drying device.

[0014] Preferably, the drying device includes a drying cylinder, rotating supports at both ends of the drying cylinder, a second drive motor for driving the drying cylinder to rotate, a hot air pipe inside the drying cylinder, and a hot air blower connected to the end of the hot air pipe.

[0015] Preferably, the inner wall of the drying cylinder is provided with a spiral guide plate, and multiple lifting plates are arranged axially within the spiral guide groove formed by the guide plate.

[0016] Preferably, the surface of the lifting plate forms an angle of 30-60° with the rotation axis of the drying cylinder.

[0017] The beneficial effects of this utility model are:

[0018] The screen and filter plate in this utility model screening device are arranged vertically, which can allow water to quickly pass through the screen and filter plate and be discharged while the dredged soil is initially screened, thus achieving preliminary dehydration and reducing the moisture content of the dredged soil entering the subsequent squeezing and dehydration device.

[0019] The drying device is connected to the extrusion dewatering device, which can directly dry the dredged soil after extrusion dewatering, reducing the risk of moisture re-wetting in the intermediate process, ensuring that the dredged soil is dried in time, and improving drying efficiency and quality. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the screening device in an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a schematic diagram of the internal structure of the extrusion dehydration device in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the drying device in an embodiment of this utility model;

[0025] In the diagram: 1-Base, 2-Feed hopper, 3-Screening device, 301-Screening box, 302-Support frame, 303-Elastic support component, 304-Vibration motor, 305-Screen, 306-Filter plate, 307-First discharge port, 308-Second discharge port, 309-First drain port, 310-Bracket, 311-Pressure roller, 312-First filter cloth, 313-Baffle bar, 314-Second filter cloth, 4-Extrusion dewatering device 401-Extrusion cylinder, 402-Filter cylinder, 403-Extrusion screw, 404-First drive motor, 405-End plate, 406-Through hole, 407-Second drain outlet, 5-Drying device, 501-Drying cylinder, 502-Rotating support, 503-Second drive motor, 504-Gear and gear ring, 505-Hot air pipe, 506-Hot air blower, 507-Ventilation hole, 508-Guide plate, 509-Lifting plate. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model. Example

[0028] like Figure 1 As shown, a dredged soil dewatering and drying device includes a base 1, a feed hopper 2, a screening device 3, a compression dewatering device 4, and a drying device 5. The screening device 3 is located below the feed hopper 2, the compression dewatering device 4 is located below the screening device 3, and the drying device 5 is located at the tail end of the compression dewatering device 4.

[0029] like Figure 2As shown, the screening device 3 includes a screening box 301, a support frame 302 installed in the screening box 301 by an elastic support member 303, a vibration motor 304 installed at the bottom of the support frame 302, and a screen 305 and a filter plate 306 distributed vertically on the support frame 302. The elastic support member 303 uses multiple springs, which are distributed at the bottom of the support frame 302.

[0030] Both the screen 305 and the filter plate 306 are inclinedly arranged inside the screening box 301, and the outlet of the feed hopper 2 is located at the higher end of the feed hopper 2. The screening box 301 has a first discharge port 307 and a first discharge port 308 respectively, located at the lower ends of the screen 305 and the filter plate 306. A first drain port 309 is located at the bottom of the screening box 301. The mesh size of the screen 305 is larger than that of the filter plate 306, and the screen 305 is used to screen out stones from the dredged soil.

[0031] like Figure 3 As shown, the upper surface of the filter plate 306 is provided with raised baffles 313. The baffles 313 extend horizontally and are spaced out from top to bottom on the filter plate 306. The height of the baffles 313 is 1-2 mm, which slows down the dredged soil's descent. A first filter cloth 312 is provided on the surface of the filter plate 306, covering the filter plate 306 and the baffles 313. Under the vibration of the vibrating motor 304, the dredged soil falling onto the screen 305 is screened and falls onto the filter plate 306. The dredged soil slides down the filter plate 306, allowing some water to permeate through the first filter cloth 312 and the filter plate 306. When passing the baffles 313, the sliding speed slows down and there is a brief pause to facilitate further water penetration. With the vibration of the filter plate 306, the dredged soil slides further down past the baffles 313.

[0032] A pair of extrusion assemblies are provided at the lower end of the filter plate 306. The extrusion assembly includes supports 310 fixed on both sides of the filter plate 306 and a pair of pressure rollers 311 mounted on the supports 310. The two pressure rollers 311 are respectively located on the upper and lower sides of the upper surface of the filter plate 306, and the surface of the pressure rollers 311 is covered with a second filter cloth 314. Both pressure rollers 311 are powered rollers. The dredged soil is squeezed out by the extrusion action of the two pressure rollers 311, thereby reducing the water content of the dredged soil.

[0033] like Figure 4As shown, the extrusion dewatering device 4 includes an extrusion cylinder 401 fixed on the base 1, a filter cylinder 402 concentrically arranged inside the extrusion cylinder 401, an extrusion screw 403 rotatably installed inside the filter cylinder 402, and a first drive motor 404 driving the extrusion screw 403. The end of the filter cylinder 402 is connected to the drying device 5. The feed inlet at the end of the filter cylinder 402 is located below the second discharge port 308. The surface of the filter cylinder 402 is provided with tiny filter holes. Under the extrusion action of the extrusion screw 403, the water in the dredged soil is further squeezed out and collected into the extrusion cylinder 401. A second drain port 407 is provided at the bottom of the extrusion cylinder 401.

[0034] The filter cylinder 402 is provided with an end plate 405 facing the drying device 5. The end plate 405 has through holes 406, which connect the filter cylinder 402 and the drying device 5. With the squeezing action of the extrusion screw 403, the dredged soil passes through the through holes 406 and enters the drying device 5 in a long strip shape.

[0035] like Figure 5 As shown, the drying device 5 includes a drying cylinder 501, rotating supports 502 disposed at both ends of the drying cylinder 501, a second drive motor 503 for driving the drying cylinder 501 to rotate, a hot air pipe 505 disposed inside the drying cylinder 501, and a hot air blower 506 connected to the end of the hot air pipe 505.

[0036] The second drive motor 503 and the drying cylinder 501 are driven by gears and a gear ring 504. That is, a gear ring is installed on the outer wall of the drying cylinder 501, and a gear is installed on the output shaft of the second drive motor 503.

[0037] The front end of the drying cylinder 501 is rotatably connected to the extrusion cylinder 401 and is connected to the water filter cylinder 402 through the through hole 406. The rear end of the drying cylinder 501 is equipped with a fixed end cover, which can rotate relative to the drying cylinder 501. The hot air pipe 505 is fixed on the end cover.

[0038] The portion of the hot air duct 505 located in the drying cylinder 501 is provided with a ventilation hole 507. The ventilation hole 507 is located on the lower pipe wall of the hot air duct 505 to prevent dredged soil from entering the hot air duct 505.

[0039] The inner wall of the drying cylinder 501 is provided with a spiral guide plate 508, and multiple lifting plates 509 are arranged axially within the spiral guide groove formed by the guide plate 508. The surface of the lifting plate 509 forms an angle α with the rotation axis of the drying cylinder 501, with the angle α being 30-60°. This causes the dredged soil to continuously tumble and disperse during the drying process, increasing the contact area with hot air and accelerating moisture evaporation.

Claims

1. A dewatering and drying device for dredged soil, comprising a base (1), a drying device (5), and a feed hopper (2), characterized in that, Also includes: The screening device (3) is located below the feed hopper (2) and includes a screening box (301), a support frame (302) installed in the screening box (301) by an elastic support member (303), a vibration motor (304) located at the bottom of the support frame (302), and a screen (305) and a filter plate (306) distributed vertically on the support frame (302). The extrusion dehydration device (4) is located below the screening device (3) and includes an extrusion cylinder (401) fixed on the base (1), a filter cylinder (402) concentrically arranged in the extrusion cylinder (401), an extrusion screw (403) rotatably installed in the filter cylinder (402), and a first drive motor (404) driving the extrusion screw (403). The end of the filter cylinder (402) is connected to the drying device (5).

2. A dewatering and drying apparatus for dredged soil according to claim 1, characterized in that: The screen (305) and the filter plate (306) are both inclinedly arranged in the screening box (301), and the outlet of the feed hopper (2) is located at the higher end of the feed hopper (2).

3. A dewatering and drying apparatus for dredged soil according to claim 2, characterized in that: The upper surface of the filter plate (306) is provided with raised baffles (313), which extend horizontally and are distributed at intervals from top to bottom on the filter plate (306).

4. A dewatering and drying apparatus for dredged soil according to claim 3, characterized in that: The surface of the filter plate (306) is provided with a first filter cloth (312), which covers the filter plate (306) and the baffle (313).

5. A dewatering and drying apparatus for dredged soil according to claim 4, characterized in that: A pair of extrusion assemblies are provided at the lower end of the filter plate (306). The extrusion assembly includes a bracket (310) fixed on both sides of the filter plate (306) and a pair of pressure rollers (311) mounted on the bracket (310). The two pressure rollers (311) are respectively located on the upper and lower sides of the upper plate surface of the filter plate (306). The surface of the pressure rollers (311) is covered with a second filter cloth (314).

6. A dewatering and drying apparatus for dredged soil according to claim 1, characterized in that: The filter cylinder (402) has an end plate (405) at one end facing the drying device (5). The end plate (405) has through holes (406) distributed on it, and the through holes (406) connect the filter cylinder (402) and the drying device (5).

7. A dewatering and drying apparatus for dredged soil according to claim 6, characterized in that: The drying device (5) includes a drying cylinder (501), rotating supports (502) at both ends of the drying cylinder (501), a second drive motor (503) for driving the drying cylinder (501) to rotate, a hot air pipe (505) inside the drying cylinder (501), and a hot air blower (506) connected to the end of the hot air pipe (505).

8. A dewatering and drying apparatus for dredged soil according to claim 7, characterized in that: The inner wall of the drying cylinder (501) is provided with a spiral guide plate (508), and multiple lifting plates (509) are arranged axially in the spiral guide groove formed by the guide plate (508).

9. A dewatering and drying apparatus for dredged soil according to claim 8, characterized in that: The surface of the lifting plate (509) forms an angle of 30-60° with the rotation axis of the drying cylinder (501).

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