River sludge dewatering device and system thereof

Abstract

The utility model provides a river sludge dewatering device and system, and the river sludge dewatering device comprises a rack; the dewatering box is arranged on the rack, at least the lower surface of the dewatering box is provided with a plurality of drainage holes, the outer side face of one end of the dewatering box is provided with a feeding port, and the other end of the dewatering box is an open end; the filter pressing module can extrude the sludge in the dewatering box to the other end of the dewatering box and dewater the sludge; and the discharging module can open and / or close the open end of the dewatering box. According to the river sludge dewatering device, the filter pressing module can extrude and dewater the sludge in the dewatering box towards the other end of the dewatering box, then the open end of the dewatering box is opened, the filter pressing module pushes the dewatered sludge out of the dewatering box to complete one-time river sludge dewatering, and then the sludge dewatering process is repeated; and the river sludge is continuously dehydrated.

Description

Technical Field

[0001] This application relates to the fields of environmental engineering and municipal engineering, and in particular to a river silt dewatering device and system thereof. Background Technology

[0002] With the promulgation of the national "Ten Measures for Water Pollution Prevention and Control", my country generates a large amount of dredged silt every year. Due to the high water content, low permeability, and rich organic matter and pollutants in river silt, if it is not effectively treated, this silt will occupy a large amount of land resources, become new waste, and cause "secondary pollution".

[0003] Currently, the common approach both domestically and internationally for the treatment and disposal of river dredging sludge is to solidify it for resource utilization. However, river dredging sludge has a high water content, and direct solidification would consume a large amount of solidifying agent, resulting in high disposal costs that are difficult to bear in engineering projects.

[0004] Currently, there is no dewatering device that can facilitate continuous treatment of river silt. Utility Model Content

[0005] To address the problems in the prior art, this application provides a river silt dewatering device and a river silt dewatering system. The technical solution of this application is as follows:

[0006] A river silt dewatering device, comprising:

[0007] frame;

[0008] A dehydration tank is mounted on the frame. At least the lower surface of the dehydration tank is provided with a plurality of drainage holes. One end of the dehydration tank has a feed inlet on its outer side, and the other end is an open end.

[0009] A filter press module, which can squeeze and dehydrate the sludge in the dewatering tank to the other end of the dewatering tank;

[0010] A discharge module, which is capable of opening and / or closing the opening end of the dehydration tank.

[0011] Furthermore, the upper surface of the dehydration tank is also provided with multiple drainage holes.

[0012] Furthermore, the inner cavity of the dewatering tank is cylindrical; the filter press module includes a first filter press assembly; the first filter press assembly includes: a screw, the screw including a core rod and helical blades disposed on the outer surface of the core rod, the screw being disposed inside the dewatering tank and extending from one end of the dewatering tank to the other end; a first motion unit, the first motion unit being capable of driving the screw to rotate around an axis to squeeze and dewater the sludge in the dewatering tank toward the other end of the dewatering tank.

[0013] Furthermore, the filter press module further includes a second filter press assembly; the second filter press assembly includes: an annular pusher plate, which is disposed perpendicularly to the screw inside the dehydration tank and located at one end of the dehydration tank, the outer side of the annular pusher plate matches the inner cavity of the dehydration tank, and the inner diameter of the annular pusher plate is greater than or equal to the outer diameter of the screw; and a second motion unit, which is capable of pushing the annular pusher plate from one end of the dehydration tank to the other end.

[0014] Further, the screw is a variable diameter screw; the screw includes: a first screw section, located at the end of the screw near the feed inlet, the length of the first screw section being greater than or equal to the stroke of the annular pusher plate, and the outer diameter of the first screw section being less than or equal to the inner diameter of the annular pusher plate; and a second screw section, located at the other end of the screw, and the outer diameter of the second screw section being less than or equal to the inner diameter of the dehydration tank; wherein, the outer diameter of the first screw section is smaller than the outer diameter of the second screw section.

[0015] Furthermore, the discharge module includes: a cover plate; and a third motion unit, which can drive the cover plate to seal or open the opening of the dehydration tank.

[0016] Furthermore, the river silt dewatering device also includes a drug delivery module, which includes a drug storage container, a drug delivery tube, and a fourth motion unit, wherein the fourth motion unit is capable of delivering the flocculant stored in the drug storage container into the dewatering tank via the drug delivery tube.

[0017] Furthermore, the screw and the dewatering tank are made of conductive metal materials; the river silt dewatering device also includes an electroosmosis module, wherein the anode of the electroosmosis module is electrically connected to the screw, and the cathode is electrically connected to the dewatering tank.

[0018] Furthermore, the outer thickness of the helical blade is 80% to 100% of the inner thickness; and / or, the surface of the helical blade is plated with titanium, or the helical blade is made of titanium metal.

[0019] This application also provides a river silt dewatering system, comprising: the river silt dewatering device described in any of the above claims; and a conveyor belt disposed below the open end of the dewatering tank.

[0020] With the river silt dewatering device provided in this application, after river silt is pumped into the dewatering tank through the inlet, the filter press module can squeeze and dewater the silt in the dewatering tank to the other end of the dewatering tank. After dewatering, the discharge module opens the opening of the dewatering tank, so that the filter press module pushes the dewatered silt out of the dewatering tank to complete one round of river silt dewatering. Then the discharge module closes the opening and repeats the above silt dewatering process to continuously dewater the river silt. In particular, when a drug delivery module and an electroosmosis module are also provided, the dewatering effect can be further improved.

[0021] The above description is merely an overview of the technical solution of this application. In order to make the technical means of this application clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other objects, features and advantages of this application more obvious and understandable, the following is an example of a specific implementation of this application. Attached Figure Description

[0022] Figure 1 : A side view of the river silt dewatering device in the embodiments of this application from a first perspective;

[0023] Figure 2 : A side view of the river silt dewatering device in the embodiments of this application;

[0024] Figure 3 : A front view cross-sectional structural diagram of the river silt dewatering device in the embodiments of this application;

[0025] Figure 4 : A schematic diagram of the screw structure in the embodiments of this application;

[0026] Figure 5 : A schematic diagram of the structure of the annular pusher plate in the embodiments of this application;

[0027] Figure 6 : A schematic diagram of the control module connection in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Rack;

[0030] 210. Drain hole; 220. Feed inlet; 230. Open end; 240. Top cover;

[0031] 211. Screw; 211-1. Core rod; 211-2. Helical blade; 212. First motion unit; 221. Annular push plate; 222. Second motion unit;

[0032] 410. Cover plate; 420. Third motion unit. Detailed Implementation

[0033] The following embodiments of this application are only used to illustrate specific implementation methods of this application, and these embodiments should not be construed as limitations on this application. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this application shall be considered equivalent substitutions and fall within the protection scope of this application.

[0034] Those skilled in the art should understand that, in the disclosure of this application, the terms "first," "second," "third," "fourth," "fifth," etc., are only used to distinguish different structures and do not limit the number of specific structures, connection relationships, etc.; in addition, the orientation or positional relationship indicated by "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0035] This embodiment provides a river silt dewatering device, such as... Figures 1-5 As shown, it includes:

[0036] 100 racks;

[0037] A dehydration tank is mounted on the frame 100. At least the lower surface of the dehydration tank 100 is provided with a plurality of drain holes 210. One end of the dehydration tank 100 (e.g., Figure 3 The outer side of the right end is provided with a feed inlet 220, and the other end (such as...) Figure 3 The left end) is the open end 230;

[0038] A filter press module, which can squeeze and dehydrate the sludge in the dewatering tank to the other end of the dewatering tank;

[0039] A discharge module, which is capable of opening and / or closing the opening end of the dehydration tank.

[0040] This embodiment provides a river silt dewatering device. When river silt is pumped into the dewatering tank through the inlet 220, the filter press module squeezes and dewaters the silt towards the other end of the tank. After dewatering, the discharge module opens the opening of the dewatering tank, allowing the filter press module to push the dewatered silt out, completing one cycle of river silt dewatering. The discharge module then closes the opening, repeating the dewatering process continuously.

[0041] Preferably, the upper surface of the dehydration tank is also provided with multiple drainage holes 210, which makes it easier to drain water from the entire side of the dehydration tank.

[0042] Preferably, the inner surface of the dewatering tank is covered with filter cloth to prevent river silt from being discharged from the drain hole 210.

[0043] More preferably, the dehydration tank is provided with a top cover 240 to facilitate the laying / replacement of filter cloth on the inner surface of the dehydration tank, and to facilitate replacement when the screw 211 is worn.

[0044] Based on the above embodiments, such as Figures 1-5 As shown, the inner cavity of the dehydration tank is cylindrical; the filter press module includes a first filter press assembly;

[0045] The first filter press assembly includes:

[0046] The screw 211 includes a core rod 211-1 and a helical blade 211-2 disposed on the outer surface of the core rod 211-1. The screw 211 is disposed inside the dehydration tank and extends from one end of the dehydration tank to the other end.

[0047] The first motion unit 212 can drive the screw 211 to rotate around the axis to squeeze and dehydrate the sludge in the dehydration tank to the other end of the dehydration tank.

[0048] That is, this embodiment provides a specific scheme for a filter press module, which drives the screw 211 to rotate through the first motion unit 212 (in this embodiment, it is a motor, preferably a geared motor) to move, stir, and squeeze the river silt located between the spiral blades 211-2 and the core rod 211-1 to the other end of the dewatering tank to achieve dewatering; after dewatering is completed, the opening end of the dewatering tank is opened through the discharge module, and the screw continues to rotate to push the dewatered silt out from the opening end of the dewatering tank.

[0049] Based on the previous embodiment, such as Figures 1-5 As shown, the filter press module further includes a second filter press assembly; the second filter press assembly includes:

[0050] An annular pusher plate 221 is disposed perpendicularly to the screw 211 inside the dehydration tank and located at one end of the dehydration tank. The outer side of the annular pusher plate 221 matches the inner cavity of the dehydration tank, and the inner diameter of the annular pusher plate 221 is greater than or equal to the outer diameter of the screw 211.

[0051] The second motion unit 222 is capable of pushing the annular pusher plate 221 from one end of the dehydration tank to the other end.

[0052] In the previous embodiment, the screw 211 exerted limited pressure on the river silt. This embodiment further provides a filter press module that also includes a second filter press assembly. When the dewatering tank is full of river silt, the screw 211 rotates, and simultaneously the second motion unit 222 (e.g., an electric actuator or cylinder; in this embodiment, an electric actuator is used to simplify the equipment and facilitate on-site deployment) pushes the annular push plate 221 to move towards the other end of the dewatering tank (it only needs to move a short distance, enough to compact the river silt for dewatering and drainage), thereby improving the dewatering efficiency and effect of the river silt.

[0053] Additionally, when the filter press module further includes a second filter press assembly, one end of the dewatering tank (e.g.) Figure 3 The right end can also be left unsealed, with the annular pusher plate 221 acting as a barrier to block river silt. Simultaneously, it prevents a small amount of silt from leaking through the gap between the screw 211 and the annular pusher plate 221, which could affect the return of the annular pusher plate 221 after prolonged operation. Figure 3 (Right end movement).

[0054] Based on the above embodiments, such as Figure 4 As shown, the screw is a variable diameter screw;

[0055] The screw 211 includes:

[0056] The first screw section is located at the end of the screw closest to the feed inlet. The length of the first screw section is greater than or equal to the travel of the annular push plate, and the outer diameter of the first screw section is less than or equal to the inner diameter of the annular push plate (preferably, the outer side of the first screw section matches the inner opening of the annular push plate, that is, the outer diameter of the first screw section is equal to the inner diameter of the annular push plate and they do not interfere with each other during relative movement).

[0057] The second screw section is located at the other end of the screw, and the outer diameter of the second screw section is less than or equal to the inner diameter of the dehydration tank (preferably, the outer side of the second screw section is matched with the inner cavity of the dehydration tank, that is, the outer diameter of the second screw section is equal to the inner diameter of the dehydration tank and they do not interfere with each other during relative movement).

[0058] The outer diameter of the first screw segment is smaller than the outer diameter of the second screw segment.

[0059] The solution in this embodiment further optimizes the structure of the screw 211 by specially setting a first section of the screw, thereby creating a larger space between the first section of the screw and the dewatering tank, which facilitates the movement of the annular push plate 221 with a smaller stroke, resulting in more efficient and effective dewatering of river silt.

[0060] Based on the above embodiments, such as Figures 1-3 As shown, the material discharge module includes:

[0061] Cover plate 410;

[0062] The third motion unit 420 (e.g., an electric actuator or cylinder; in this embodiment, an electric actuator is used to simplify the equipment and facilitate on-site installation) can drive the cover plate 410 to seal or open the opening end 230 of the dehydration tank.

[0063] This embodiment provides a specific solution for the material feeding module.

[0064] Based on the above embodiments, the river silt dewatering device further includes:

[0065] The drug delivery module (not shown in the figure) includes a drug storage container, a drug delivery tube, and a fourth motion unit (a pump in this embodiment). The fourth motion unit delivers the flocculant stored in the drug storage container into the dehydration tank via the drug delivery tube. The flocculant input into the dehydration tank by the drug delivery module is stirred by a screw and comes into full contact with the river silt, thereby achieving flocculation and dehydration.

[0066] Regarding the number and location of the dosing tube outlets in the dehydration tank, those skilled in the art can make appropriate settings according to the specific circumstances.

[0067] That is, the river silt dewatering device in this embodiment can further achieve flocculation dewatering to increase dewatering efficiency and effect.

[0068] Based on the above embodiments, the screw and the dehydration tank are made of conductive metal materials;

[0069] The river silt dewatering device also includes an electroosmosis module (not shown in the figure), wherein the anode of the electroosmosis module is electrically connected to the screw, and the cathode is electrically connected to the dewatering tank.

[0070] It should be noted that since the voltage required for electroosmotic dehydration is generally greater than 36V, it may pose a risk of electric shock to the human body. Therefore, during electroosmotic dehydration, operators are strictly prohibited from touching the frame 100 and the dehydration tank; or, the outer surface of the frame 100 and the dehydration tank, or the entire machine, which may be touched, should be covered with insulating materials such as polymer materials to prevent electric shock accidents.

[0071] In this embodiment, the voltage for electroosmotic dehydration is 50V. When used in conjunction with the above-mentioned filter press module (including the first filter press component and the second filter press component) and drug delivery module, it can dehydrate river silt to a water content of less than 40%, or even less than 30%.

[0072] The river silt dewatering device in this embodiment can further achieve electroosmotic dewatering to increase dewatering efficiency and effectiveness.

[0073] Regarding electroosmotic dehydration, which is an existing solution, this application will not elaborate further. Those skilled in the art will know that the anode and cathode of existing electroosmotic dehydration equipment can be connected to the screw 211 and the dehydration tank respectively to perform electroosmotic dehydration.

[0074] Currently, regarding screw designs, the force on the inner side (closer to the core rod) of the helical blade is generally much greater than that on the outer side (away from the core rod). Therefore, in order to ensure the life of the screw, the thickness of the outer side (away from the core rod) of the helical blade is generally much smaller than the thickness of the inner side (closer to the core rod).

[0075] However, the inventors of this application discovered that during electroosmotic dehydration, the outer side of the spiral blades would wear down and thin more quickly. When using ordinary spiral blades, the outer diameter of the screw would decrease rapidly, which would increase the gap between the outer side of the screw and the inner cavity of the dehydration tank, seriously affecting the screw's stirring and squeezing effect on the river silt, thus affecting the dehydration efficiency and effect.

[0076] Therefore, preferably, the thickness of the outer side (the side away from the core rod 211-1) of the spiral blade 211-2 is 80% to 100% of the thickness of the inner side (the side closer to the core rod 211-1). This minimizes the impact of electroosmotic dehydration on the outer diameter of the screw, allowing the device to operate for a longer period.

[0077] Furthermore, the inventors discovered that after plating the surface of the helical blades with titanium, even during prolonged electroosmotic dehydration, the loss of metallic titanium is minimal, and the dehydration effect is excellent. Therefore, titanium plating can be used to reduce losses in helical blades, or pure metallic titanium can be used to manufacture the helical blades.

[0078] like Figure 6 As shown, the river silt dewatering device of this application can further include a control module (which can use existing microcontrollers, PLCs, or other control schemes) to be electrically connected to the above modules (such as the control valves of the motors, electric actuators / cylinders, pumps, etc.) to realize the automated control of the river silt dewatering device of this application. Regarding the control module's control of the motors, electric actuators, cylinders, control valves, pumps, etc., existing commonly used technical solutions can be adopted, and will not be elaborated upon in this application.

[0079] This application also provides a river silt dewatering system, comprising one or more (e.g., two, three, four, or five or more) of the aforementioned river silt dewatering devices; and,

[0080] A conveyor belt is disposed below the open end of the dehydration tank.

[0081] Therefore, multiple river silt dewatering devices of this application can be conveniently arranged beside the river. River silt is pumped to the river silt dewatering device by a pump or the like for dewatering. The dewatered river silt is pushed onto a conveyor belt and transported to a truck or the like for subsequent solidification to prepare building materials or fillers.

[0082] Although the embodiments of this application have been described above, this application is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, based on the guidance of this specification and without departing from the scope of protection of the claims of this application, can make many other forms, all of which are within the scope of protection claimed in this application.

Claims

1. A device for dewatering river silt, characterized in that, include: frame; A dehydration tank is mounted on the frame. At least the lower surface of the dehydration tank is provided with a plurality of drainage holes. One end of the dehydration tank has a feed inlet on its outer side, and the other end is an open end. A filter press module, which can squeeze and dehydrate the sludge in the dewatering tank to the other end of the dewatering tank; A discharge module, which is capable of opening and / or closing the opening end of the dehydration tank.

2. The river silt dewatering device as described in claim 1, characterized in that, The upper surface of the dehydration tank is also provided with multiple drainage holes.

3. The river silt dewatering device as described in claim 1, characterized in that, The inner cavity of the dehydration tank is cylindrical; The pressure filtration module includes a first pressure filtration component; The first filter press assembly includes: A screw, comprising a core rod and helical blades disposed on the outer surface of the core rod, the screw being disposed inside the dehydration tank and extending from one end of the dehydration tank to the other end; The first motion unit can drive the screw to rotate around the axis to squeeze and dehydrate the sludge in the dewatering tank to the other end of the dewatering tank.

4. The river silt dewatering device as described in claim 3, characterized in that, The filter press module also includes a second filter press assembly; The second filter press assembly includes: An annular pusher plate is disposed perpendicularly to the screw inside the dehydration tank and located at one end of the dehydration tank. The outer side of the annular pusher plate matches the inner cavity of the dehydration tank, and the inner diameter of the annular pusher plate is greater than or equal to the outer diameter of the screw. The second motion unit is capable of pushing the annular pusher plate from one end of the dehydration tank to the other end.

5. The river silt dewatering device as described in claim 4, characterized in that, The screw is a variable diameter screw; The screw includes: The first screw section is located at the end of the screw closest to the feed inlet. The length of the first screw section is greater than or equal to the stroke of the annular pusher plate, and the outer diameter of the first screw section is less than or equal to the inner diameter of the annular pusher plate. The second screw section is located at the other end of the screw, and the outer diameter of the second screw section is less than or equal to the inner diameter of the dehydration tank; The outer diameter of the first screw segment is smaller than the outer diameter of the second screw segment.

6. The river silt dewatering device as described in claim 1, characterized in that, The material discharge module includes: Cover plate; The third motion unit is capable of driving the cover plate to seal or open the opening of the dehydration tank.

7. The river silt dewatering device as described in claim 3, characterized in that, The river silt dewatering device also includes: The drug delivery module includes a drug storage container, a drug delivery tube, and a fourth motion unit, wherein the fourth motion unit is capable of delivering the flocculant stored in the drug storage container into the dehydration tank via the drug delivery tube.

8. The river silt dewatering device as described in claim 3, characterized in that, The screw and the dehydration tank are made of conductive metal materials; The river silt dewatering device also includes an electroosmosis module, wherein the anode of the electroosmosis module is electrically connected to the screw, and the cathode is electrically connected to the dewatering tank.

9. The river silt dewatering device as described in claim 8, characterized in that, The outer thickness of the helical blade is 80% to 100% of the inner thickness; and / or, The surface of the helical blade is plated with titanium, or the helical blade is made of titanium metal.

10. A river silt dewatering system, characterized in that, include: One or more river silt dewatering devices according to any one of claims 1 to 9; and a conveyor belt, which is disposed below the open end of the dehydration tank.

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