A ship sediment filtration system and method

Abstract

The application discloses a ship sediment filtering system, which comprises a sea gate, a filtering device and a water pump, the sea gate comprises an input port and an output port, the input port is provided with a coarse filter grid, the inner bottom of the sea gate is provided with an inclined sedimentation plate which is inclined to the input port, the inner top of the sea gate is provided with a downwardly extending spoiler, the input end of the filtering device is connected with the output port, the input end of the filtering device is provided with a first water inlet valve, the filtering device is provided with a filter layer, the input end of the filtering device is communicated with the output end of the filtering device through the filter layer, the output end of the filtering device is provided with a first water outlet valve, the input end of the water pump is connected with the output end of the filtering device, and the output end of the water pump is connected with a ship water equipment. The application can filter the sediment in turbid seawater, deliver clean seawater to the ship water equipment, thereby guaranteeing the equipment reliability, and has high filtering efficiency. The application also provides a ship sediment filtering method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of ship equipment, and particularly relates to a ship sediment filtering system and method. BACKGROUND

[0002] The sea chest of a ship is a key component in the ship structure for connecting the outside seawater with the ship internal system, which is usually located at the bilge of the two sides of the ship body and is responsible for sucking in seawater for use by multiple systems on the ship, such as cooling systems, ballast systems, fire fighting systems, etc. However, the seawater sucked in by the ship in the near sea is relatively turbid, and a large amount of sediment in the turbid water in the near sea has a great impact on the ship equipment. Although the traditional physical and chemical treatment methods have certain effects, they have problems of low treatment efficiency and high cost, which can easily affect the normal operation of the ship and even cause safety accidents of the ship. Therefore, it is urgent to improve the sediment content in the seawater sucked in by the ship to ensure the equipment reliability. Thus, in order to avoid the shortcomings in the prior art, it is necessary to improve the prior art. SUMMARY

[0003] The purpose of the present application is to provide a ship sediment filtering system which can filter the sediment in turbid seawater and deliver clean seawater to the ship water equipment for use, thereby ensuring the equipment reliability and having high filtering efficiency. The present application also provides a ship sediment filtering method.

[0004] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] A ship sediment filtering system, comprising a sea chest, a filtering device and a water pump, wherein the sea chest comprises an input port and an output port, the input port is provided with a coarse filter grid, the inner bottom of the sea chest is provided with an inclined sedimentation plate extending obliquely to the input port, and the inner top of the sea chest is provided with a downwardly extending spoiler; the filtering device comprises a container and a filter layer, the filter layer is arranged in the container and separates the cavity of the container into a water inlet cavity on one side of the input end and a water outlet cavity on one side of the output end; the input end of the filtering device is connected with the output port, the input end of the water pump is connected with the output end of the filtering device, and the output end of the water pump is connected with the ship water equipment.

[0006] As a preferred scheme of the above ship sediment filtering system, a first sediment discharge hole is formed in the bottom of the sea chest.

[0007] As a preferred scheme of the above ship sediment filtering system, the filter layer comprises a hydrophobic filter layer, a ceramic filter layer and a nano filter layer.

[0008] The hydrophobic filter layer is provided with two, and the two hydrophobic filter layers are respectively arranged on one side of the filter layer close to the water inlet cavity and one side of the filter layer close to the water outlet cavity.

[0009] The ceramic filter layer and the nanometer filter layer are both provided with a plurality of, the ceramic filter layer and the nanometer filter layer are arranged alternately in the inside of the filter layer, wherein two ceramic filter layers are respectively adjacent to two hydrophobic filter layers.

[0010] As a preferred scheme of the ship sediment filtration system, the input end of the filter device is provided with a first water inlet valve, and the output end of the filter device is provided with a first water outlet valve.

[0011] As a preferred scheme of the ship sediment filtration system, the lower end of the container is provided with a sediment discharge chamber, and the sediment discharge chamber is communicated with the lower end of the filter layer.

[0012] As a preferred scheme of the ship sediment filtration system, the input end of the filter device is provided with a backwashing water outlet valve connected in parallel with the first water inlet valve, and the water outlet end of the backwashing water outlet valve is connected with the water inlet end of the first water inlet valve.

[0013] As a preferred scheme of the ship sediment filtration system, the upper end of the container is provided with a backwashing water chamber, and the backwashing water chamber is communicated with the upper end of the filter layer.

[0014] As a preferred scheme of the ship sediment filtration system, the output end of the filter device is provided with a backwashing water inlet valve connected in parallel with the first water outlet valve, and the water inlet end of the backwashing water inlet valve is connected with the water inlet end of the first water outlet valve.

[0015] As a preferred scheme of the ship sediment filtration system, a plurality of inclined sedimentation plates are arranged at intervals on the inner bottom of the sea gate.

[0016] The application also provides a filtration method based on the ship sediment filtration system, which includes a filtration mode and a backwashing mode.

[0017] The filtration mode includes the following steps:

[0018] Step 1.1, opening the sea gate to make seawater flow into the sea gate through the input port;

[0019] Step 1.2, continuously flowing seawater until the inside of the sea gate is filled, and closing the sea gate;

[0020] Step 1.3, opening the water pump to provide power to make the water in the sea gate pass through the filter device and then be transported to the ship water equipment after filtration;

[0021] The backwashing mode includes the following steps:

[0022] Step 2.1, opening the backwashing water inlet valve, closing the first water outlet valve, and transporting the filtered clean water to the backwashing water chamber.

[0023] Step 2.2, backwashing water cavity into the filter layer to flush the silt in the filter layer to the silt discharge cavity;

[0024] Step 2.3, open the backwashing water outlet valve, open the first water inlet valve, and the upper clear liquid in the silt discharge cavity is extracted from the backwashing water outlet valve and reenters the first water inlet valve for filtration.

[0025] Compared with the prior art, the ship silt filtration system provided by the present application has the beneficial effects that:

[0026] The present application can filter silt in turbid seawater and deliver clean seawater to ship water equipment, thereby ensuring equipment reliability. After the sea gate is opened, seawater flows into the input port, and a coarse filter grid is arranged at the input port to coarsely filter the incoming seawater and filter out large-particle solid silt to avoid clogging the sea gate. The inclined sedimentation plate can block silt, and the seawater inside the sea gate needs to have a liquid level higher than the inclined sedimentation plate to flow over the inclined sedimentation plate to the output port. Since the density of silt is greater than that of water, the silt blocked by the inclined sedimentation plate will naturally sink to the inner bottom of the sea gate, thereby reducing the silt contained in the seawater flowing over the inclined sedimentation plate to the output port. The inclined setting of the inclined sedimentation plate toward the input port can prevent silt from flowing upward with the incoming water flow. During the upward flow of seawater mixed with silt after entering the sea gate, the inclined setting of the inclined sedimentation plate toward the input port can block the silt, and the silt cannot continue to rise upward after hitting the inclined sedimentation plate, thereby causing the silt to settle. The inner top of the sea gate is provided with a downward extending spoiler, and the seawater flow is relatively turbulent when flowing into the sea gate. The seawater mixed with silt will flow into the inner top of the sea gate, and the downward extending spoiler can block the seawater mixed with silt, thereby having a deceleration effect on the incoming seawater. After the seawater is decelerated or stationary, the silt will naturally settle downward, avoiding the silt directly flowing to the output port with the turbulent seawater. The input end of the filter device is connected with the output port. After the first water inlet valve is opened, the seawater filtered of silt by the sea gate flows from the output port to the filter device, so that the seawater is filtered by the filter layer. After the first water outlet valve is opened, the seawater filtered by the filter layer flows out from the output end of the filter device. The seawater entering the ship is filtered by the sea gate and the filter device, with high filtration efficiency. The water pump delivers the clean seawater filtered by the filter device to the ship water equipment. The use of filtered clean seawater can reduce the failure probability of the ship water equipment and avoid clogging of the ship water equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0028] Fig. 1 is a schematic view of the filter device of the present application;

[0029] Fig. 2 is a schematic view of the submarine gate of the present application;

[0030] Fig. 3 is a schematic view of the ship sediment filtration system of the present application.

[0031] Markings in the figure:

[0032] 100, submarine gate; 110, coarse filter grid; 120, inclined sedimentation plate; 130, spoiler; 140, first sand discharge hole; 200, filtration device; 210, filter layer; 211, hydrophobic filter layer; 212, ceramic filter layer; 213, nano filter layer; 220, first water inlet valve; 230, first water outlet valve; 240, backwashing water inlet valve; 250, backwashing water outlet valve; 260, second sand discharge hole; 270, sand discharge cavity; 280, backwashing water cavity; 290, container; 300, water pump; 400, ship water equipment. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application, which does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0037] Please refer to Figs. 1-3 together, the ship sediment filtration system provided by the embodiments of the present application will be described.

[0038] like Figs. 1-3 As shown, the present invention includes a seagate 100, a filter device 200, and a water pump 300. The seagate 100 includes an inlet and an outlet. The inlet is provided with a coarse filter screen 110. The bottom inner part of the seagate 100 is provided with an inclined sedimentation plate 120 extending towards the inlet. The top inner part of the seagate 100 is provided with a downwardly extending baffle plate 130. The filter device 200 includes a container 290 and a filter layer 210. The filter layer 210 is disposed inside the container 290 and divides the cavity of the container 290 into an inlet chamber located on the inlet side and an outlet chamber located on the outlet side. The inlet of the filter device 200 is connected to the outlet. The inlet of the water pump 300 is connected to the outlet of the filter device 200. The outlet of the water pump 300 is connected to the ship's water supply equipment 400.

[0039] When seawater flows in through the seabed gate 100, the inclined sedimentation plate 120, which is tilted towards the inlet, can block the seawater. This causes the seawater to impact the inclined sedimentation plate 120 and slow down its flow. As a result, the sediment is less likely to cross the inclined sedimentation plate 120 with the seawater. The seawater can only cross the inclined sedimentation plate 120 and flow to the outlet when the liquid level is higher than the inclined sedimentation plate 120. The sediment will sink due to sedimentation and cannot cross the inclined sedimentation plate 120 with the high liquid level of the seawater to flow to the outlet. If the inclined sedimentation plate 120 is not tilted towards the inlet, the flow rate of the seawater will be greater, and the sediment will be washed up with the seawater entering the seabed gate 100 and will be washed to the outlet with the seawater before it has settled.

[0040] For example, the bottom of the seabed gate 100 is provided with a first row of sand holes 140. The sediment deposited in the seabed gate 100 will be at the bottom and can be discharged through the first row of sand holes 140, so as to avoid accumulation inside the seabed gate 100 and blockage that is difficult to clean.

[0041] For example, the filter layer 210 includes a hydrophobic filter layer 211, a ceramic filter layer 212, and a nano filter layer 213;

[0042] Two hydrophobic filter layers 211 are provided, and the two hydrophobic filter layers 211 are respectively disposed on the side of the filter layer 210 near the water inlet chamber and the side of the filter layer 210 near the water outlet chamber.

[0043] Multiple ceramic filter layers 212 and multiple nano filter layers 213 are provided. The ceramic filter layers 212 and multiple nano filter layers 213 are alternately arranged inside the filter layer 210. Two of the ceramic filter layers 212 are respectively close to two of the hydrophobic filter layers 211. The multi-layer structure is formed by the spaced arrangement, which has a better filtration effect on the mud and sand in the seawater.

[0044] For example, the hydrophobic filter layer 211 uses super-hydrophobic polymer material, the ceramic filter layer 212 uses porous ceramic, and the nano filter layer 213 uses nano-composite porous material. The super-hydrophobic polymer material has extremely high repellency to water, which enables the super-hydrophobic material to effectively repel water molecules during the filtration process while allowing other substances to pass through, thereby achieving oil-water separation or other types of filtration process. The porous ceramic has high porosity, which provides a large number of channels for fluid to pass through the material, thereby achieving high-efficiency filtration. The nano-composite porous material has extremely high specific surface area, which increases the surface area in contact with the fluid and improves the filtration efficiency.

[0045] For example, the input end of the filter device 200 is provided with a first water inlet valve 220, and the output end of the filter device 200 is provided with a first water outlet valve 230.

[0046] For example, the lower end of the container 290 is provided with a sand discharge chamber 270, which is in communication with the lower end of the filter layer 210. The lower end of the container 290 is provided with a second sand discharge hole 260, and the filter layer 210 is in communication with the sand discharge chamber 270 through the second sand discharge hole 260. The sand filtered out in the filter device 200 will sink downward. Since the second sand discharge hole 260 is in communication with the sand discharge chamber 270, the sand will sink downward to the second sand discharge hole 260, be discharged to the sand discharge chamber 270 through the second sand discharge hole 260, and be conveniently cleaned.

[0047] For example, the input end of the filter device 200 is provided with a backwashing water outlet valve 250 in parallel with the first water inlet valve 220. The water outlet end of the backwashing water outlet valve 250 is connected to the water inlet end of the first water inlet valve 220. In this way, after backwashing, the supernatant in the upper layer of the air discharge chamber can re-enter the filter device 200 for filtration through the backwashing water outlet valve 250 and the first water inlet valve 220.

[0048] For example, the input end of the filter device 200 is provided with a backwashing water outlet valve 250, and the output end of the filter device 200 is provided with a backwashing water inlet valve 240. Both the backwashing water outlet valve 250 and the backwashing water inlet valve 240 are one-way valves. During backwashing, the first water inlet valve 220 and the first water outlet valve 230 are closed, and the backwashing water inlet valve 240 and the backwashing water outlet valve 250 are opened. The water pump 300 provides power to make water enter the filter device 200 from the backwashing water inlet valve 240, thereby cleaning the filter device 200. The cleaned water is discharged from the backwashing water outlet valve 250, thereby realizing the backwashing function of the filter device 200.

[0049] Exemplarily, the upper end of the container 290 is provided with a backwashing water cavity 280, which is communicated with the upper end of the filter layer 210, so that water in the backwashing water cavity 280 can enter the filter layer 210 for backwashing.

[0050] Exemplarily, the output end of the filter device 200 is provided with a backwashing water inlet valve 240 in parallel with the first water outlet valve 230, and the water inlet end of the backwashing water inlet valve 240 is connected with the water inlet end of the first water outlet valve 230, so that after the first water outlet valve is closed and the backwashing water inlet valve 240 is opened, the filtered water can be used to backwash the filter device 200 to clean the filter device 200.

[0051] Exemplarily, the upper end of the filter device 200 is provided with a backwashing water cavity 280, the backwashing water inlet valve 240 is communicated with the backwashing water cavity 280, and the backwashing water outlet valve 250 is communicated with the sand discharging cavity 270. The backwashing water cavity 280 is arranged at the upper end of the filter device 200 and communicated with the backwashing water inlet valve 240, so that after water enters the backwashing water inlet valve 240, it first passes through the backwashing water cavity 280 at the upper end of the filter device 200, so that the water can wash the filter device 200 from top to bottom, and the washing is more thorough and cleaner.

[0052] Exemplarily, a plurality of inclined sedimentation plates 120 are arranged at intervals in the inner bottom of the sea gate 100. The seawater in the sea gate 100 flows to the second inclined sedimentation plate 120 only when the liquid level is higher than the first inclined sedimentation plate 120, flows to the next sedimentation plate only when the liquid level between the first inclined sedimentation plate 120 and the second inclined sedimentation plate 120 is higher than the second sedimentation plate, and so on. In this way, the mud is subjected to multiple sedimentation and filtration, so that the seawater entering the output port contains less mud, the filter device 200 is facilitated to filter, and the filter device 200 is prevented from being blocked.

[0053] The application also provides a filtering method based on the ship mud filtering system, characterized by comprising a filtering mode and a backwashing mode.

[0054] The filtering mode comprises the following steps.

[0055] Step 1.1, opening the sea gate 100 to let seawater flow into the inside of the sea gate 100 through the input port;

[0056] Step 1.2, continuously inputting seawater until the inside of the sea gate 100 is filled, and closing the sea gate 100;

[0057] Step 1.3, opening the water pump 300 to provide power to let the water in the inside of the sea gate 100 pass through the filter device 200 for filtration and then be transported to the ship water equipment 400.

[0058] The backwashing mode comprises the following steps:

[0059] Step 2.1, opening the backwashing water inlet valve 240, closing the first water outlet valve 230, and conveying the filtered clean water to the backwashing water cavity 280;

[0060] Step 2.2, the backwashing water cavity 280 enters the filter layer 210 to wash the silt in the filter layer 210 to the silt cavity 270;

[0061] Step 2.3, opening the backwashing water outlet valve 250, opening the first water inlet valve 220, and pumping the upper clear liquid in the silt cavity 270 from the backwashing water outlet valve 250 to re-enter the first water inlet valve 220 for filtration.

[0062] The seawater entering from the sea chest 100 is filtered by the inclined sedimentation plate 120 and the spoiler plate 130 in the sea chest 100, then filtered in the filter device 200, and finally the filtered seawater is conveyed to the ship water equipment 400 by the water pump 300.

[0063] Compared with the prior art, the ship silt filtering system provided by the embodiment of the present application has the beneficial effects that:

[0064] The present application can filter the silt in turbid seawater, and deliver clean seawater to the ship water equipment 400, so as to ensure the reliability of the equipment. After the seafloor door 100 is opened, seawater flows into the input port, and a coarse filter grid 110 is arranged at the input port to coarsely filter the incoming seawater and filter out large-particle solid silt to avoid clogging the seafloor door 100. The inclined sedimentation plate 120 can block the silt, and the water level inside the seafloor door 100 needs to be higher than the inclined sedimentation plate 120 to flow over the inclined sedimentation plate 120 to the output port. Since the density of silt is greater than that of water, the silt will naturally sink to the bottom of the seafloor door 100 after being blocked by the inclined sedimentation plate 120, thereby reducing the silt contained in the seawater flowing over the inclined sedimentation plate 120 to the output port. The inclined sedimentation plate 120 is inclined to the input port to prevent the silt from flowing upward with the incoming water flow. During the upward flow of the seawater mixed with silt after entering the seafloor door 100, the inclined sedimentation plate 120 is inclined to the input port to block the silt, so that the silt cannot continue to rise upward and thus deposits. The inner top of the seafloor door 100 is provided with a downward extending spoiler 130. The seawater flows rapidly when flowing into the seafloor door 100, and the seawater mixed with silt will flow onto the inner top of the seafloor door 100 after flowing in. The downward extending spoiler 130 can block the seawater mixed with silt, thereby having a deceleration effect on the incoming seawater. After the seawater is decelerated or stationary, the silt will naturally deposit downward, avoiding the silt flowing directly to the output port with the turbulent seawater. The input end of the filter device 200 is connected with the output port. After the first water inlet valve 220 is opened, the seawater filtered of silt by the seafloor door 100 flows from the output port to the filter device 200, so that the seawater passes through the filter layer 210 for filtering. After the first water outlet valve 230 is opened, the seawater filtered by the filter layer 210 flows out of the output end of the filter device 200. The seawater entering the ship is filtered by the seafloor door 100 and the filter device 200, with high filtering efficiency. The clean seawater filtered by the filter device 200 is delivered to the ship water equipment 400 by the water pump 300. Using the filtered clean seawater can reduce the failure probability of the ship water equipment 400 and avoid clogging of the ship water equipment 400.

[0065] The above only describes the preferred embodiments of the present application. It should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered within the protection scope of the present application.

Claims

1. A ship silt filtration system, characterized in that, The utility model relates to a ship's water supply system, which comprises a submarine gate, a filter device, and a water pump. The submarine gate comprises an input port and an output port, the input port is provided with a coarse filter grid, the inner bottom of the submarine gate is provided with an inclined sedimentation plate extending obliquely to the input port, and the inner top of the submarine gate is provided with a downwardly extending spoiler. The filter device comprises a container and a filter layer, the filter layer is arranged in the container and separates the cavity of the container into a water inlet cavity on one side of the input end and a water outlet cavity on one side of the output end. The input end of the filter device is connected with the output port, the filter layer comprises a hydrophobic filter layer, a ceramic filter layer, and a nano filter layer, the hydrophobic filter layer is provided with two, the two hydrophobic filter layers are arranged on one side of the filter layer close to the water inlet cavity and one side of the filter layer close to the water outlet cavity respectively, the ceramic filter layer and the nano filter layer are each provided with a plurality of, the ceramic filter layer and the nano filter layer are alternately arranged in the interior of the filter layer, two ceramic filter layers are respectively close to two hydrophobic filter layers, the input end of the filter device is provided with a first water inlet valve, and the output end of the filter device is provided with a first water outlet valve. The input end of the water pump is connected with the output end of the filter device, and the output end of the water pump is connected with a ship water equipment.

2. The ship silt filtration system of claim 1, wherein, The bottom of the submarine gate is provided with a first sand discharge hole.

3. The ship silt filtration system of claim 1, wherein, The lower end of the container is provided with a sand discharge cavity, and the sand discharge cavity is communicated with the lower end of the filter layer.

4. The ship silt filtration system of claim 3, wherein, The input end of the filter device is provided with a backwashing water outlet valve connected with the first water inlet valve in parallel, and the water outlet end of the backwashing water outlet valve is connected with the water inlet end of the first water inlet valve.

5. The ship silt filtration system of claim 1, wherein, The upper end of the container is provided with a backwashing water cavity, and the backwashing water cavity is communicated with the upper end of the filter layer.

6. The ship silt filtration system of claim 5, wherein, The output end of the filter device is provided with a backwashing water inlet valve connected with the first water outlet valve in parallel, and the water inlet end of the backwashing water inlet valve is connected with the water inlet end of the first water outlet valve.

7. The ship silt filtration system of claim 1, wherein, A plurality of inclined sedimentation plates are arranged at intervals on the inner bottom of the submarine gate.

8. A filtration method based on the ship sediment filtration system according to any one of claims 1 to 7, characterized in that, The system comprises a filter mode and a backwashing mode. The filter mode comprises the following steps: Step 1.1, opening the submarine gate to let seawater flow into the submarine gate through the input port; Step 1.2, continuously inputting seawater until the inside of the submarine gate is filled, and closing the submarine gate; Step 1.3, opening the water pump to provide power to let the water in the inside of the submarine gate be filtered through the filter device and then delivered to the ship water equipment; The backwashing mode comprises the following steps: Step 2.1, opening the backwashing water inlet valve, closing the first water outlet valve, delivering the filtered clean water to the backwashing water cavity; Step 2.2, the backwashing water cavity enters the filter layer to flush the silt in the filter layer to the sand discharge cavity; Step 2.3, opening the backwashing water outlet valve, opening the first water inlet valve, and pumping the upper clear liquid in the sand discharge cavity out of the backwashing water outlet valve to re-enter the first water inlet valve for filtration.

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