Intercepting and filtering device for sewage draining exit for port sewage treatment

Abstract

The invention discloses a port sewage treatment sewage draining exit intercepting and filtering device, and relates to the technical field of sewage filtering treatment, the port sewage treatment sewage draining exit intercepting and filtering device comprises a front end flow guide rotating part, a self-driven scattering and conveying assembly and a first-stage intercepting part, the front end flow guide rotating part is linked with the self-driven scattering and conveying assembly, and the first-stage intercepting part is linked with the self-driven scattering and conveying assembly; the self-driven scattering and conveying assembly comprises a spiral conveying structure and an auxiliary transmission structure, the auxiliary transmission structure is matched with a mounting groove of an external fixing structure and assists the spiral conveying structure to continuously rotate, sludge in sewage can be scattered when the spiral conveying structure rotates, the sewage and sundries meeting the particle size are conveyed to the first-stage intercepting part, and the second-stage intercepting part is used for intercepting the sewage. Impurities which do not accord with the particle size are separated and intercepted by the first-stage intercepting piece.

Description

Technical Field

[0001] This invention relates to the field of wastewater filtration and treatment technology, and in particular to a port wastewater treatment outlet interception and filtration device. Background Technology

[0002] As a hub for water and land transportation, ports discharge wastewater with complex compositions, containing large amounts of ship sewage, cargo residue sludge, floating debris (such as plastic bags and branches), and suspended particles. Direct discharge of such wastewater would severely pollute nearshore waters. Currently, the filtration devices for port sewage outlets have the following core pain points: 1. Most filtration devices use fixed filter screens, which are prone to sludge adhering to the surface of the screens and causing blockages, requiring regular shutdown for cleaning; although some devices have added stirring structures, they rely on motor drives, and port sewage outlets often lack stable power supply conditions, making them impractical. 2. Ports are affected by the ebb and flow of tides, and backflow of sewage outlets is prone to occur (seawater backflows when the tide rises and sewage discharge pressure fluctuates). Existing anti-backflow structures are mostly one-way valves, but one-way valves are easily blocked by debris and fail, causing backflow sewage to carry unfiltered impurities back into the sewage system, causing secondary pollution. 3. Most filter devices consist of stacked filter screens with fixed pore sizes, which cannot accurately intercept impurities of different particle sizes. Furthermore, the filter impurities are integrated with the device body, requiring complete disassembly for cleaning, which is cumbersome and affects the normal sewage discharge operations of the port.

[0003] Therefore, a port sewage treatment outlet interception and filtration device can be used to address the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose a port sewage treatment discharge outlet interception and filtration device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A port sewage treatment outlet interception and filtration device includes a primary filtration unit arranged sequentially along the sewage flow direction, a mechanical anti-backflow unit, and a secondary filtration unit. Storage chambers are detachably connected to the lower parts of both the primary and secondary filtration units. Both the primary and secondary filtration units operate self-driven by the sewage flow. The primary filtration unit includes a front-end flow guide rotating component, a self-driven dispersing and conveying assembly, and a primary interceptor component. The front-end flow guide rotating component is driven to rotate by the flow of sewage and is linked with the self-driven dispersing and conveying assembly. The self-driven dispersing and conveying assembly includes a spiral conveying structure and an auxiliary transmission structure. The auxiliary transmission structure is adapted to the mounting groove of the external fixed structure and is used to assist the spiral conveying structure in continuous rotation.

[0006] Furthermore, the mechanical anti-backflow unit includes a fixed frame, at least two fixed anti-backflow components and one movable anti-backflow component, and the structure of the secondary filtration unit is adapted to the primary filtration unit.

[0007] Furthermore, the two fixed anti-backflow components are symmetrically fixed inside the fixed frame, and the movable anti-backflow component slides with the fixed frame through a sliding connection structure. When the sewage flows forward, it pushes the movable anti-backflow component to move towards the front end of the fixed anti-backflow component to form a flow channel. When the sewage flows backward, it pushes the movable anti-backflow component to move towards the rear end of the fixed anti-backflow component and forms a sealing fit with the fixed anti-backflow component to block the backflow. When the spiral conveying structure rotates, it breaks up solid impurities in the sewage and conveys the sewage and impurities that meet the interception particle size to the first-level interceptor. Impurities that do not meet the interception particle size are intercepted by the first-level interceptor and fall into the corresponding storage cavity. The structure of the secondary filter unit is adapted to the primary filter unit, and the secondary interceptor of the secondary filter unit has a smaller interception aperture than the primary interceptor. It is used to intercept small impurities that were not intercepted by the primary filter unit, and the intercepted small impurities fall into the corresponding storage cavity.

[0008] Furthermore, the front-end flow guide rotating component is one of a sloping impeller, an impeller, or a propeller, and the angle of the front-end flow guide rotating component facing the water is 25°-45°, ensuring that it can be driven to rotate when the sewage flow velocity is ≥0.3m / s, and the rotation speed is 5-20r / min.

[0009] Furthermore, the auxiliary transmission structure is one or a combination of a roller belt, a guide slider, or a rolling bearing, and the fit clearance between the auxiliary transmission structure and the mounting groove is 0.1-0.3mm to ensure that the radial runout of the screw conveyor structure during rotation is ≤0.5mm.

[0010] Furthermore, the primary interceptor and the secondary interceptor are one of a filter screen, a grid, or a perforated plate, the primary interceptor has an interception aperture of 8-20mm, and the secondary interceptor has an interception aperture of 2-8mm.

[0011] Furthermore, the sliding connection structure is one of a sliding rod, a sliding guide rail, or a sliding groove. The sliding stroke of the movable anti-reverse water component along the sliding connection structure is 10-50mm. The mating surface of the movable anti-reverse water component and the fixed anti-reverse water component is provided with an elastic sealing layer. The sealing layer material is silicone or nitrile rubber to ensure that the sealing pressure after mating is greater than 0.2MPa.

[0012] Furthermore, the storage cavity is connected to the corresponding primary and secondary filter units in one of the following ways: snap-fit ​​connection, threaded connection, or flange connection. The volume of the storage cavity is 5-20L, and a transparent observation window is provided on the outside of the storage cavity to facilitate observation of the amount of debris accumulation.

[0013] Compared with the prior art, the advantages of this invention are: 1. This invention utilizes a front-end guide rotating component, a self-driven dispersing and conveying assembly, and a primary interceptor. The front-end guide rotating component is linked with the self-driven dispersing and conveying assembly. The self-driven dispersing and conveying assembly includes a spiral conveying structure and an auxiliary transmission structure. The auxiliary transmission structure is adapted to the mounting groove of the external fixed structure to assist the continuous rotation of the spiral conveying structure. When the spiral conveying structure rotates, it can disperse the sludge in the sewage and convey the sewage and impurities of the appropriate particle size to the primary interceptor. Impurities that do not meet the particle size are intercepted by the primary interceptor. By combining "water flow driven inclined plane paddle - spiral conveying - roller belt assistance", sludge dispersing and impurity conveying can be achieved without an external motor.

[0014] 2. This invention utilizes a fixed frame, at least two fixed anti-backflow components, and one movable anti-backflow component. The fixed anti-backflow components are symmetrically fixed inside the fixed frame, while the movable anti-backflow component slides with the fixed frame via a sliding connection structure. When sewage flows forward, the movable anti-backflow component moves along the sliding connection structure towards the front end of the fixed anti-backflow component, forming a sewage flow channel. When sewage flows backward, the movable anti-backflow component moves along the sliding connection structure towards the rear end of the fixed anti-backflow component, forming a sealed fit with the fixed anti-backflow component to block the backflow of sewage. The stepped fit structure of "fixed anti-backflow component + movable anti-backflow component" improves the success rate of preventing backflow and eliminates the risk of debris clogging.

[0015] 3. The secondary interceptor of the present invention has a smaller interception aperture than the primary interceptor, and is used to intercept small debris that was not intercepted by the primary filter unit. The storage cavity is connected to the lower part of the primary filter unit and the secondary filter unit respectively, and is used to collect the intercepted debris. The storage cavity and the corresponding filter unit are detachably connected, which facilitates regular cleaning. Attached Figure Description

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a port sewage treatment outlet interception and filtration device proposed in this invention; Figure 2 This is a schematic diagram of the external structure of the present invention; Figure 3 This is a schematic diagram of the mechanical anti-reverse flow unit of the present invention; Figure 4This is a schematic diagram of the fixed anti-reverse flow component, the movable anti-reverse flow component, and the sliding connection structure of the present invention. Figure 5 For the present invention Figure 2 Axonometric structural schematic diagram; Figure 6 This is a schematic diagram of the structure of the secondary filtration unit of the present invention; Figure 7 This is a schematic diagram of the internal structure of the secondary filtration unit of the present invention; Figure 8 This is a schematic diagram of the first-level interceptor structure of the present invention.

[0017] In the diagram: 1. Primary filtration unit; 12. Storage chamber; 2. Secondary filtration unit; 21. Front-end guide rotating component; 22. Spiral conveyor structure; 23. Primary interceptor component; 24. Self-driven dispersing and conveying assembly; 25. Auxiliary transmission structure; 26. Mounting groove; 3. Mechanical anti-backflow unit; 31. Fixed frame; 32. Fixed anti-backflow component; 33. Movable anti-backflow component; 34. Sliding connection structure. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1-8 A port sewage treatment outlet interception and filtration device includes a primary filtration unit 1, a mechanical anti-backflow unit 3, and a secondary filtration unit 2 arranged sequentially along the sewage flow direction. Storage chambers 12 are detachably connected to the lower parts of the primary filtration unit 1 and the secondary filtration unit 2. Both the primary filtration unit 1 and the secondary filtration unit 2 are self-driven by the sewage flow. The primary filtration unit 1 includes a front-end flow guide rotating component 21, a self-driven dispersing and conveying assembly 24, and a primary interceptor 23. The front-end flow guide rotating component 21 is driven to rotate by the flow of sewage and is linked with the self-driven dispersing and conveying assembly 24. The self-driven dispersing and conveying assembly 24 includes a spiral conveying structure 22 and an auxiliary transmission structure 25. The auxiliary transmission structure 25 is adapted to the mounting groove 26 of the external fixed structure and is used to assist the spiral conveying structure 22 to rotate continuously. When the spiral conveying structure 22 rotates, it can disperse solid impurities in the sewage and convey the sewage and impurities that meet the interception particle size to the primary interceptor 23. Impurities that do not meet the interception particle size are intercepted by the primary interceptor 23 and fall into the corresponding storage chamber 12. The mechanical anti-backflow unit 3 includes a fixed frame 31, at least two fixed anti-backflow components 32 and a movable anti-backflow component 33. The structure of the secondary filter unit 2 is adapted to the primary filter unit 1.

[0020] The fixed anti-backflow component 32 is symmetrically fixed inside the fixed frame 31. The movable anti-backflow component 33 slides with the fixed frame 31 through the sliding connection structure 34. When the sewage flows forward, the movable anti-backflow component 33 is pushed to move towards the front end of the fixed anti-backflow component 32 to form a flow channel. When the sewage flows backward, the movable anti-backflow component 33 is pushed to move towards the rear end of the fixed anti-backflow component 32 and forms a sealing fit with the fixed anti-backflow component 32 to block the backflow. The structure of the secondary filter unit 2 is adapted to the primary filter unit 1, and the interception aperture of the secondary interceptor of the secondary filter unit 2 is smaller than that of the primary interceptor 23. It is used to intercept small impurities that were not intercepted by the primary filter unit 1, and the intercepted small impurities fall into the corresponding storage cavity 12.

[0021] Specifically, port sewage enters the primary filtration unit 1 through the sewage outlet. When the sewage flows, it impacts the front guide rotating component 21 (inclined paddle), causing the front guide rotating component 21 to rotate around its own axis. The front guide rotating component 21 is linked to the self-driven spiral conveying structure 22 of the dispersing and conveying assembly 24 through a transmission structure (such as gears or belts). At the same time, the auxiliary transmission structure 25 (roller belt) around the spiral conveying structure 22 rolls along the mounting groove 26 of the external fixed structure, assisting the spiral conveying structure 22 to rotate continuously and stably. Wastewater and fine debris (particle size ≤15mm) filtered through the first stage flow into the mechanical anti-backflow unit 3. The impact force of the positive water flow pushes the movable anti-backflow component 33 to move towards the front end along the sliding connection structure 34 (sliding rod). The movable anti-backflow component 33 forms a gap (flow width 20-50mm) with the fixed anti-backflow components 32 on both sides. The wastewater continues to flow forward along the gap to the secondary filtration unit 2. When the tides rise and fall in the port cause backflow, the impact force of the backflowing sewage pushes the movable anti-backflow component 33 to move towards the rear end along the sliding rod until the two sides of the movable anti-backflow component 33 are tightly fitted with the inner mating surface of the fixed anti-backflow component 32 (fitting gap ≤ 0.5mm), forming a sealed blocking structure, completely blocking the backflowing sewage from flowing back into the primary filter unit 1; the small amount of backflowing sewage that is not completely blocked (if any) is automatically guided to the front inlet of the secondary filter unit 2 due to the pressure difference generated by the sealed blockage, avoiding secondary pollution; Wastewater from the mechanical anti-backflow unit 3 flows into the secondary filtration unit 2. The rotating parts of the secondary filtration unit 2 are driven to rotate by the water flow, which in turn drives the internal spiral conveying structure 22 (rotation speed 8-20 r / min) to further break up the fine sludge in the wastewater (particle size ≤ 5 mm) and convey the wastewater and debris with a particle size ≤ the aperture of the secondary interceptor (e.g., 2-5 mm) forward, passing through the secondary interceptor at the rear end. Fine debris with a particle size > the aperture of the secondary interceptor (e.g., sand, fine fibers) is intercepted by the secondary interceptor and falls into the corresponding storage chamber 12 below. When the debris in the two storage chambers 12 accumulates to 80% of the volume (judged by the observation window), the valve at the front end of the drain outlet is closed, and the storage chamber 12 is disassembled from below the corresponding primary filtration unit 1 and secondary filtration unit 2 along the snap-fit ​​structure. After emptying the debris, it is reinstalled. The entire cleaning process takes ≤ 10 minutes and does not require disassembling the primary filtration unit 1 and the secondary filtration unit 2.

[0022] Specifically, the front-end guide rotating component 21 (inclined paddle) is mounted on the inlet end of the primary filter unit 1 via bearings, and its rotating shaft is connected to the input end of the screw conveyor structure 22 via gear transmission (module 2, transmission ratio 1:2). Four polyurethane roller belts are evenly installed around the outer periphery of the screw conveyor structure 22. The roller belts are embedded in the mounting groove 26 (groove width 22mm) of the external fixing structure to ensure that there is no radial offset when the screw conveyor structure 22 rotates. The primary interceptor 23 (grid) is connected to the output end of the screw conveyor structure 22 via a flange. The corresponding storage chamber 12 is connected below the grid via a snap fastener. A guide plate (slope 15°) is provided at the connection between the grid and the storage chamber 12 to facilitate the falling of debris. Two fixed anti-backflow components 32 are symmetrically welded to the inside of the fixed frame 31. The inner mating surface of the fixed anti-backflow component 32 is processed into a stepped shape (step height 2mm) and a 1mm thick silicone sealing layer is pasted on it. The movable anti-reverse water component 33 is fitted with a sliding rod on both sides by a sliding sleeve (inner diameter 10.2mm). The two ends of the sliding rod are welded to the fixed frame 31. The edge of the movable anti-reverse water component 33 is processed into a protrusion that matches the stepped mating surface of the fixed anti-reverse water component 32 to ensure a seal when mated. The two ends of the fixed frame 31 are connected to the output end of the primary filter unit 1 and the input end of the secondary filter unit 2 through flanges to form a sewage flow channel. The structure of the secondary filter unit 2 is the same as that of the primary filter unit 1. The difference is that the pitch of the spiral conveying structure 22 is smaller (60mm), the secondary interceptor is a nylon filter screen with a 5mm aperture, and the snap-fit ​​position of the storage cavity 12 corresponding to the secondary filter unit 2 is symmetrical to that of the storage cavity 12 corresponding to the primary filter unit 1, which facilitates unified cleaning operation.

[0023] A specific embodiment of the present invention includes the following steps: S1: Sewage self-driven primary filtration. The flow of sewage drives the front guide rotating component 21 of the primary filtration unit 1 to rotate, and the linked spiral conveying structure 22 breaks up impurities and conveys them to the primary interceptor 23 to achieve preliminary interception. S2: Mechanical anti-backflow linkage, the forward water flow pushes the movable anti-backflow component 33 to form a flow channel, and the reverse water flow pushes the movable anti-backflow component 33 to seal and fit with the fixed anti-backflow component 32, blocking the backflow; S3: Self-driven secondary filtration of sewage. After the sewage passes through the anti-backflow stage, it drives the front guide rotating component 21 of the secondary filtration unit 2 to rotate, which in turn drives its spiral conveying structure 22 to further break up impurities and transport them to the secondary interceptor to achieve fine interception. S4: Clean debris regularly. Remove the storage chamber 12 from below the corresponding filter unit, empty the debris, and reinstall to complete the cleaning.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A port sewage treatment outlet interception and filtration device, comprising a primary filtration unit (1) arranged sequentially along the sewage flow direction, characterized in that, It also includes a mechanical anti-backflow unit (3) and a secondary filtration unit (2). Storage chambers (12) are detachably connected to the lower parts of the primary filtration unit (1) and the secondary filtration unit (2). Both the primary filtration unit (1) and the secondary filtration unit (2) operate self-driven through sewage flow. The primary filtration unit (1) includes a front-end flow guide rotating component (21), a self-driven dispersing and conveying assembly (24), and a primary interceptor (23). The front-end flow guide rotating component (21) is driven to rotate by the flow of sewage and is linked with the self-driven dispersing and conveying assembly (24). The self-driven dispersing and conveying assembly (24) includes a spiral conveying structure (22) and an auxiliary transmission structure (25). The auxiliary transmission structure (25) is adapted to the mounting groove (26) of the external fixed structure and is used to assist the spiral conveying structure (22) in continuous rotation.

2. The port sewage treatment outlet interception and filtration device according to claim 1, characterized in that, The mechanical anti-backflow unit (3) includes a fixed frame (31), at least two fixed anti-backflow components (32) and a movable anti-backflow component (33). The structure of the secondary filter unit (2) is adapted to the primary filter unit (1).

3. The port sewage treatment outlet interception and filtration device according to claim 2, characterized in that, Two fixed anti-backflow components (32) are symmetrically fixed inside the fixed frame (31). The movable anti-backflow component (33) is slidably connected to the fixed frame (31) through a sliding connection structure (34). When the sewage flows forward, the movable anti-backflow component (33) is pushed to move towards the front end of the fixed anti-backflow component (32) to form a flow channel. When the sewage flows backward, the movable anti-backflow component (33) is pushed to move towards the rear end of the fixed anti-backflow component (32) and forms a sealed fit with the fixed anti-backflow component (32) to block the backflow. When the spiral conveying structure (22) rotates, it disperses solid impurities in the sewage and conveys the sewage and impurities that meet the interception particle size to the first-level interceptor (23). Impurities that do not meet the interception particle size are intercepted by the first-level interceptor (23) and fall into the corresponding storage chamber (12). The structure of the secondary filter unit (2) is adapted to the primary filter unit (1), and the secondary interceptor aperture of the secondary filter unit (2) is smaller than that of the primary interceptor (23), which is used to intercept small impurities that were not intercepted by the primary filter unit (1), and the intercepted small impurities fall into the corresponding storage cavity (12).

4. The port sewage treatment outlet interception and filtration device according to claim 1, characterized in that, The front-end guide rotating component (21) is one of a sloped impeller, an impeller or a propeller. The angle of the front-end guide rotating component (21) facing the water is 25°-45°. It can be driven to rotate when the sewage flow velocity is ≥0.3m / s. The rotation speed is 5-20r / min.

5. The port sewage treatment outlet interception and filtration device according to claim 1, characterized in that, The auxiliary transmission structure (25) is one or a combination of roller belt, guide slider or rolling bearing. The fit clearance between the auxiliary transmission structure (25) and the mounting groove (26) is 0.1-0.3mm to ensure that the radial runout of the screw conveyor structure (22) is ≤0.5mm when it rotates.

6. The port sewage treatment outlet interception and filtration device according to claim 3, characterized in that, The primary interceptor (23) and the secondary interceptor are one of a filter screen, a grid, or a perforated plate. The interception aperture of the primary interceptor (23) is 8-20 mm, and the interception aperture of the secondary interceptor is 2-8 mm.

7. The port sewage treatment outlet interception and filtration device according to claim 3, characterized in that, The sliding connection structure (34) is one of a sliding rod, a sliding guide rail or a sliding groove. The sliding stroke of the movable anti-reverse water component (33) along the sliding connection structure (34) is 10-50mm. The mating surface of the movable anti-reverse water component (33) and the fixed anti-reverse water component (32) is provided with an elastic sealing layer. The sealing layer material is silicone or nitrile rubber to ensure that the sealing pressure after mating is greater than 0.2MPa.

8. The port sewage treatment outlet interception and filtration device according to claim 1, characterized in that, The storage cavity (12) is connected to the corresponding primary filter unit (1) and secondary filter unit (2) by a snap-fit ​​connection, a threaded connection or a flange connection. The volume of the storage cavity (12) is 5-20L, and a transparent observation window is provided on the outside of the storage cavity (12) to facilitate observation of the amount of debris accumulation.

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