A plate-and-frame filter backwash backflow energy dissipation device for a ship
The three-stage energy dissipation system solves the problem of mud splashing during the backflushing process of plate and frame filter press, and realizes the safe return of mud in the confined space of the ship. It is suitable for marine plate and frame filter press backflushing return energy dissipation devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中交(苏州)城市开发建设有限公司
- Filing Date
- 2025-04-09
- Publication Date
- 2026-06-05
AI Technical Summary
During the backflushing process of existing plate and frame filter presses, the slurry is prone to splashing when it flows back to the slurry tank or regulating tank, which restricts the working space on the ship and affects construction safety.
A three-stage energy dissipation system is adopted, including the elastic deformation of the cross-ship expansion hose, the eddy current dissipation of the energy dissipation variable diameter pipe, and the two-stage energy dissipation mechanism in the square energy dissipation box. The kinetic energy of the mud is eliminated through multi-stage flow channel diversion and collision, thereby reducing the flow velocity.
It effectively eliminates the splashing phenomenon during mud recirculation, adapts to the operational needs of confined spaces on ships, and ensures safe mud recirculation.
Smart Images
Figure CN224325263U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sludge treatment devices, and in particular to a marine plate and frame filter press backflushing and recirculation energy dissipation device. Background Technology
[0002] Marine plate and frame filter presses are solid-liquid separation devices used in ships. They consist of alternating filter plates, filter frames, and filter cloths, and achieve efficient dewatering by pressurizing and filtering mixtures of bilge wastewater, oil sludge, and other contaminated materials. With a compact structure and strong corrosion resistance, they are suitable for confined ship cabin environments and can treat oily sludge, engine room wastewater, etc., meeting international maritime environmental emission requirements. They are characterized by simple operation, low filter cake moisture content, and low maintenance costs, making them a key device for ship wastewater treatment and environmental compliance.
[0003] Research revealed that most existing plate and frame filter presses rely solely on high-pressure air backflushing for internal sludge discharge. However, this approach suffers from drawbacks due to inadequate pipeline design and mismatch between the high-pressure airflow and the sludge. This leads to significant mud splashing when the sludge is returned to the mud pit or regulating tank. The limited working space on board exacerbates the problem, making effective on-site construction impossible. Therefore, a marine plate and frame filter press backflushing and energy dissipation device is proposed to address these issues. Utility Model Content
[0004] The purpose of this utility model is to provide a marine plate and frame filter press backflushing and recirculation energy dissipation device in order to solve the problems mentioned in the background art. This device has the advantage of effectively reducing the kinetic energy of the slurry before it is blown back into the flocculation tank during the backflushing process of the plate and frame filter press, thus solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a marine plate and frame filter press backflushing and recirculation energy dissipation device, comprising: a plate and frame filter press, wherein a high-pressure air charging pipe is connected to the liquid inlet flange of the plate and frame filter press, the other end of the high-pressure air charging pipe is fixedly connected to the air outlet pipe of a high-pressure air tank, an air tank venting pipe is provided above the high-pressure air tank, an electrically controlled purge valve is provided on the outside of the high-pressure air charging pipe near the high-pressure air tank, an air compressor is provided on the side of the high-pressure air tank, a ship-crossing expansion hose is connected to the liquid outlet flange of the plate and frame filter press, an energy dissipation reducer is fixedly connected to the other end of the ship-crossing expansion hose, and a square energy dissipation box is fixedly connected to the other end of the energy dissipation reducer.
[0006] The square energy dissipation box includes a first energy dissipation mechanism and a second energy dissipation mechanism.
[0007] As a further embodiment of this utility model: the first energy dissipation mechanism includes a first housing, a main pipe is provided inside the first housing, and several sets of annular return pipes are intermittently arranged on both sides of the main pipe.
[0008] As a further embodiment of this utility model: the second energy dissipation mechanism includes a second housing, an energy dissipation cavity is provided on the inner side of the second housing, three sets of prismatic diversion columns are fixedly connected to the inner side of the energy dissipation cavity near the liquid inlet end of the second energy dissipation mechanism, and multiple sets of square energy dissipation columns are fixedly connected to the inner side of the energy dissipation cavity.
[0009] As a further improvement of this utility model: the air outlet of the air compressor is connected to the inside of the high-pressure air tank via a hose.
[0010] As a further embodiment of this utility model: the liquid inlet end of the first energy dissipation mechanism is fixedly connected to the liquid inlet end of the square energy dissipation box, the liquid outlet end of the first energy dissipation mechanism is fixedly connected to the liquid inlet end of the second energy dissipation mechanism, the liquid outlet end of the second energy dissipation mechanism is fixedly connected to the liquid outlet end of the square energy dissipation box, and the liquid outlet end of the square energy dissipation box is connected to the inlet of the mud flocculation tank.
[0011] As a further improvement of this utility model, the two ends of the main pipe are connected to the liquid inlet and liquid outlet of the first energy dissipation mechanism.
[0012] As a further improvement of this utility model, the two ends of the energy dissipation chamber are connected to the liquid inlet and liquid outlet of the second energy dissipation mechanism.
[0013] As a further improvement of this utility model: the square energy dissipation columns are arranged in multiple rows, and each group of square energy dissipation columns is staggered from the square energy dissipation columns in the adjacent rows.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] The present invention utilizes the elastic deformation energy absorption of the expansion hose across the ship, the eddy current dissipation of the energy dissipation variable diameter pipe, and the synergistic effect of the two-stage energy dissipation mechanism in the square energy dissipation box to form a three-stage energy dissipation system, which effectively reduces the mud flow velocity to a safe range and eliminates the splashing problem when the mud flows back to the flocculation tank, making it particularly suitable for the needs of operations in confined spaces on ships. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;
[0018] Figure 3 This is a schematic diagram of the internal structure of the square energy dissipation box in this utility model;
[0019] Figure 4 This is a schematic diagram of the inner structure of the first energy dissipation mechanism in this utility model;
[0020] Figure 5 This is a schematic diagram of the inner structure of the second energy dissipation mechanism in this utility model;
[0021] Figure 6 This is a schematic diagram of the process structure of this utility model.
[0022] In the diagram: 1. Plate and frame filter press; 2. High-pressure air charging pipe; 3. High-pressure air tank; 4. Air tank venting pipe; 5. Electrically controlled purge valve; 6. Air compressor; 7. Cross-ship expansion hose; 8. Energy dissipation reducer; 9. Square energy dissipation box; 91. First energy dissipation mechanism; 911. First shell; 912. Main through pipe; 913. Annular return pipe; 92. Second energy dissipation mechanism; 921. Second shell; 922. Energy dissipation chamber; 923. Prism-shaped diverter column; 924. Square energy dissipation column. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.
[0025] Reference Figures 1 to 6In this embodiment of the present invention, a marine plate and frame filter press backflushing and reflux energy dissipation device includes: a plate and frame filter press 1, a high-pressure air charging pipe 2 connected to the liquid inlet flange of the plate and frame filter press 1, an air outlet pipe of a high-pressure air tank 3 fixedly connected to the other end of the high-pressure air charging pipe 2, an air tank venting pipe 4 provided above the high-pressure air tank 3, an electrically controlled purge valve 5 provided on the outside of the high-pressure air charging pipe 2 near the high-pressure air tank 3, an air compressor 6 provided on the side of the high-pressure air tank 3, an air outlet of the air compressor 6 connected to the inside of the high-pressure air tank 3 via a hose, a ship-crossing expansion hose 7 connected to the liquid outlet flange of the plate and frame filter press 1, an energy dissipation reducer pipe 8 fixedly connected to the other end of the ship-crossing expansion hose 7, and a square energy dissipation box 9 fixedly connected to the other end of the energy dissipation reducer pipe 8.
[0026] The square energy dissipation box 9 includes a first energy dissipation mechanism 91 and a second energy dissipation mechanism 92. The liquid inlet end of the first energy dissipation mechanism 91 is fixedly connected to the liquid inlet end of the square energy dissipation box 9. The liquid outlet end of the first energy dissipation mechanism 91 is fixedly connected to the liquid inlet end of the second energy dissipation mechanism 92. The liquid outlet end of the square energy dissipation box 9 is fixedly connected to the liquid outlet end of the square energy dissipation box 9. The liquid outlet end of the square energy dissipation box 9 is connected to the inlet of the mud flocculation tank.
[0027] The air compressor 6 continuously supplies pressure to the high-pressure air tank 3, and the electrically controlled purging valve 5 is opened. High-pressure air is injected into the plate and frame filter press 1 through the high-pressure air filling pipe 2 to form a backflush airflow. This airflow pushes the remaining unfiltered slurry into the cross-ship expansion hose 7, the energy dissipation reducer pipe 8, and the square energy dissipation box 9 in sequence, and finally returns to the flocculation tank. The cross-ship expansion hose 7 absorbs the impact kinetic energy through the elastic deformation of the pipe wall. The energy dissipation reducer pipe 8 generates vortex energy dissipation through the sudden change of pipe diameter. The two-stage energy dissipation mechanism set in the square energy dissipation box 9 achieves kinetic energy attenuation through multi-stage flow channel diversion and collision. The triple energy dissipation structure works together to significantly reduce the outlet slurry flow velocity and effectively eliminate splashing. The backflush pressure is controlled by the interlock between the air tank volume and the purging time, which ensures that the slurry is completely returned and avoids overpressure damage to the filter plates.
[0028] The first energy dissipation mechanism 91 includes a first housing 911, and a main pipe 912 is provided inside the first housing 911. The two ends of the main pipe 912 are connected to the liquid inlet and liquid outlet of the first energy dissipation mechanism 91. Several sets of annular return pipes 913 are intermittently arranged on both sides of the main pipe 912, so as to re-impact the slurry in the main pipe 912 in the opposite direction after some of the slurry diverted by the annular return pipes 913 is diverted, thereby reducing the kinetic energy of the slurry flowing out of the main pipe 912.
[0029] When the high-pressure mud enters the main pipe 912, some of the mud forms a branch flow through the annular return pipe 913. After the branch flow is bent at 180° in the annular return pipe 913, it forms a reverse jet that impacts the main stream in the main pipe 912 at a 45° angle. The kinetic energy vector of the reverse jet and the main stream is superimposed to form momentum cancellation.
[0030] The second energy dissipation mechanism 92 includes a second housing 921. An energy dissipation cavity 922 is provided inside the second housing 921. The two ends of the energy dissipation cavity 922 are connected to the liquid inlet and liquid outlet of the second energy dissipation mechanism 92. Three sets of rhomboid diversion columns 923 are fixedly connected to the inside of the energy dissipation cavity 922 near the liquid inlet of the second energy dissipation mechanism 922. Multiple sets of square energy dissipation columns 924 are fixedly connected to the inside of the energy dissipation cavity 922. Multiple rows of square energy dissipation columns 924 are arranged. Each set of square energy dissipation columns 924 is staggered from the adjacent row of square energy dissipation columns 924 to improve the energy dissipation effect.
[0031] The mud that has undergone primary energy dissipation first impacts the wedge end face of the prismatic diversion column 923. The three sets of prismatic columns are arranged in a triangular pattern to divide the fluid into six branches. Each branch immediately enters the matrix energy dissipation zone composed of square energy dissipation columns 924. The fluid impacts each other between the columns and undergoes alternating expansion-contraction flow. Finally, it flows out of the square energy dissipation box 9 with lower kinetic energy.
[0032] The working principle of this utility model is as follows: First, in the preparation stage, after the air compressor 6 is started, it continuously fills the high-pressure air tank 3 with compressed air. When the pressure of the air tank reaches the set value, the air supply is stopped. At this time, the air tank drain pipe 4 is kept closed to ensure that the pressure in the air tank is stable.
[0033] When the plate and frame filter press 1 completes the filtration and needs to open the plate to unload the sludge, the electrically controlled purge valve 5 automatically opens, and the compressed air stored in the high-pressure air tank 3 is quickly injected into the plate and frame filter press 1 through the high-pressure air filling pipe 2 to form a high-pressure back-blowing airflow. This airflow pushes out the unfiltered sludge remaining in the plate and frame in the reverse direction and enters the cross-ship expansion hose 7 along the liquid outlet end.
[0034] At this point, the first energy dissipation stage begins. When the mud and high-pressure air mix and flow through the ship expansion hose 7, the hose expands radially due to internal pressure. It absorbs the kinetic energy of the fluid impact through the elastic deformation of the pipe wall. Then the fluid enters the energy dissipation reducer pipe 8. This pipe section forms a local vortex through a step-like change in diameter, which further dissipates the fluid kinetic energy.
[0035] After passing through section 8 of the energy dissipation reducer, the fluid enters the second energy dissipation stage. After entering the main pipe 912 of the first energy dissipation mechanism 91 from the energy dissipation reducer 8, some of the mud continuously flows through multiple sets of annular return pipes 913. The diverted mud is bent at 180° to form a reverse jet, which impacts the mainstream in the main pipe 912 at an inclined angle, and the flow velocity is reduced by momentum vector cancellation.
[0036] The slurry that has undergone primary energy dissipation enters the energy dissipation chamber 922 of the second energy dissipation mechanism 92. It is first divided into multiple streams by three sets of rhomboid diversion columns 923. Then, it forms repeated turbulent flow between the staggered square energy dissipation columns 924. Due to the frequent changes in flow direction, collisions and turbulence, the kinetic energy of the fluid is continuously consumed.
[0037] After passing through the two-stage energy dissipation process of the ship expansion hose 7, energy dissipation reducer 8, and square energy dissipation box 9, the slurry flows smoothly into the slurry flocculation tank from the outlet of the square energy dissipation box 9 at a low flow rate. Because the kinetic energy has been greatly reduced, splashing of slurry in the tank is avoided.
[0038] After the electrically controlled purge valve 5 is closed, the gas tank vent pipe 4 is opened to release the residual air pressure, and the air compressor 6 automatically replenishes air according to the pressure monitoring results to reserve energy for the next backflushing operation.
[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A marine plate and frame filter press backflushing and recirculation energy dissipation device, characterized in that, include: A plate and frame filter press (1) is provided with a high-pressure air charging pipe (2) connected to the inlet flange of the plate and frame filter press (1). The other end of the high-pressure air charging pipe (2) is fixedly connected to the outlet pipe of the high-pressure air tank (3). An air tank venting pipe (4) is provided above the high-pressure air tank (3). An electrically controlled purge valve (5) is provided on the outside of the high-pressure air tank (3) near the high-pressure air charging pipe (2). An air compressor (6) is provided on the side of the high-pressure air tank (3). A cross-ship expansion hose (7) is connected to the outlet flange of the plate and frame filter press (1). An energy dissipation reducer (8) is fixedly connected to the other end of the cross-ship expansion hose (7). A square energy dissipation box (9) is fixedly connected to the other end of the energy dissipation reducer (8). The square energy dissipation box (9) includes a first energy dissipation mechanism (91) and a second energy dissipation mechanism (92).
2. The marine plate and frame filter press backflushing and energy dissipation device according to claim 1, characterized in that, The first energy dissipation mechanism (91) includes a first housing (911), a main pipe (912) is provided on the inner side of the first housing (911), and several sets of annular return pipes (913) are intermittently arranged on both sides of the main pipe (912).
3. The marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 1, characterized in that, The second energy dissipation mechanism (92) includes a second housing (921), an energy dissipation chamber (922) is provided inside the second housing (921), three sets of rhomboid diversion columns (923) are fixedly connected to the inner side of the energy dissipation chamber (922) near the liquid inlet end of the second energy dissipation mechanism (92), and multiple sets of square energy dissipation columns (924) are fixedly connected to the inner side of the energy dissipation chamber (922).
4. The marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 1, characterized in that, The air outlet of the air compressor (6) is connected to the inside of the high-pressure air tank (3) via a hose.
5. The marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 1, characterized in that, The liquid inlet of the first energy dissipation mechanism (91) is fixedly connected to the liquid inlet of the square energy dissipation box (9), the liquid outlet of the first energy dissipation mechanism (91) is fixedly connected to the liquid inlet of the second energy dissipation mechanism (92), the liquid outlet of the second energy dissipation mechanism (92) is fixedly connected to the liquid outlet of the square energy dissipation box (9), and the liquid outlet of the square energy dissipation box (9) is connected to the inlet of the mud flocculation tank.
6. The marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 2, characterized in that, The two ends of the main pipe (912) are connected to the liquid inlet and liquid outlet of the first energy dissipation mechanism (91).
7. A marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 3, characterized in that, The two ends of the energy dissipation chamber (922) are connected to the liquid inlet and liquid outlet of the second energy dissipation mechanism (92).
8. A marine plate and frame filter press backflushing and recirculation energy dissipation device according to claim 3, characterized in that, The square energy dissipation columns (924) are arranged in multiple rows, and each group of square energy dissipation columns (924) is staggered from the square energy dissipation columns (924) in the adjacent row.