bilge water separator

Abstract

The application discloses a bilge water separator and relates to the technical field of ship environmental protection equipment. The separator comprises a hollow box body, a box cover and a viewing port with a sliding cover are arranged at the top of the box body, a water inlet pipe is arranged at the right side of the box body, a water outlet pipe is arranged at the left side of the box body, and the water inlet pipe is higher; an impurity filtering assembly and an oil scraping assembly are arranged in the box body, a lower baffle and an upper baffle are arranged at the bottom of the box body to form an S-shaped water flow channel, and an ultrasonic generator is arranged between the lower baffle and the two sides of the lower baffle; and an oil collecting bucket and an oil outlet pipe are arranged at the front side of the oil scraping assembly. The application has the beneficial effects of convenient impurity filtering, complete oil-water separation and intuitive monitoring, and is suitable for ship bilge water treatment.

Description

Technical Field

[0001] This application relates to the field of marine environmental protection equipment technology, and in particular to a bilge water separator. Background Technology

[0002] During ship operation, bilge water containing pollutants such as fuel oil, lubricating oil, rust, and silt accumulates in the bilge. If discharged directly without treatment, it will cause serious damage to the marine ecosystem. Therefore, the International Maritime Organization (IMO) and various countries have formulated strict regulations requiring that bilge water be treated to have an oil concentration of ≤15ppm before it can be discharged. Existing bilge water separators have several shortcomings in practical applications: First, they have poor impurity filtration. Most use fixed filter screens, which are prone to clogging, requiring frequent shutdowns for cleaning. Furthermore, the filter screens are inconvenient to install and remove, resulting in low maintenance efficiency. Second, oil-water separation is incomplete. Traditional separators rely on gravity separation or simple oil scraping structures, making it difficult to effectively separate fine emulsified oil droplets, leading to excessive oil concentration in the treated effluent. Third, equipment operation and monitoring are inconvenient. The lack of an intuitive internal observation structure makes it impossible to monitor the separation status in real time, and the water flow is prone to turbulence during separation, further affecting the separation effect. Fourth, demulsification efficiency is low. Some equipment lacks a targeted demulsification device, making it difficult for emulsified oil to separate into layers, significantly increasing the difficulty of subsequent separation. Utility Model Content

[0003] This utility model addresses the aforementioned problems in the existing technology by providing a bilge water separator.

[0004] The objective of this utility model is mainly achieved through the following solution: A bilge water separator includes a hollow internal chamber with a lid on top and an observation port on one side of the lid, fitted with a sliding cover. An inlet pipe is located on the side of the chamber near the observation port, and an outlet pipe is located on the side away from the observation port. The inlet pipe is higher than the outlet pipe. An impurity filter assembly is installed below the outlet of the inlet pipe inside the chamber. An oil skimmer assembly is installed at the top of the chamber, and multiple lower baffles are located at the bottom of the chamber between the inlet and outlet pipes. An upper channel for water flow is provided between the lower baffles and the oil skimmer assembly. An upper baffle is located on the side of the lower baffles facing the inlet pipe, with its top connected to the oil skimmer assembly. A lower channel for water flow is provided between the lower baffle and the bottom of the chamber, and the upper and lower channels are interconnected. An upper baffle is also located on the side of the oil skimmer facing the outlet pipe. Ultrasonic generators are installed at the bottom of the chamber between adjacent lower baffles and between the lower baffles on both sides and the inner wall of the chamber.

[0005] Preferably, the impurity filtration assembly includes a filter frame and two left and right limiting plates. The upper left and right sides of the filter frame are provided with extension portions. The filter frame overlaps with the two limiting plates through the extension portions. The side walls and bottom of the filter frame are provided with several filter holes. The upper front and rear sides of the filter frame are also provided with handles. The outlet of the water inlet pipe extends into the filter frame.

[0006] Preferably, the oil scraping assembly includes a mounting plate that is inclined from back to front. The rear side of the mounting plate is connected to the rear side of the housing. A rotating roller is rotatably connected to the lower surface of the mounting plate through two bearings on the left and right sides. Driven gears are fixedly sleeved at both ends of the rotating roller. A drive motor is fixedly installed on both the left and right sides of the upper surface of the mounting plate. A drive gear is fixedly sleeved at the output end of the drive motor. The drive gear meshes with the corresponding driven gear.

[0007] Preferably, the sidewall of the rotating roller is provided with a plurality of adsorption plates for adsorbing oil stains on the water surface along its length direction. The upper part of the adsorption plate passes through the upper surface of the mounting plate through a notch on the mounting plate. Scrapers are fixedly installed on both the left and right sides of the notch. The scrapers are located at the front of the adsorption plate, and the sidewall of the scraper abuts against the sidewall of the adsorption plate.

[0008] Preferably, the front side of the mounting plate is also provided with an inclined oil collection hopper, and both the left and right sides of the oil collection hopper are provided with baffles to prevent oil from flowing out from the side. The front side of the oil collection hopper is connected to the front side of the box body, and the front side of the box body is provided with an oil outlet pipe that communicates with the upper part of the oil collection hopper.

[0009] Preferably, the adsorption plate is made of glass fiber reinforced polypropylene.

[0010] Preferably, the observation port is provided with slide rails on both the front and rear sides, and the bottom of the sliding cover is provided with a slide groove that cooperates with the slide rails, so that the sliding cover can move left and right along the slide rails.

[0011] In summary, compared with the prior art, the present invention has the following beneficial technical effects: (1) This utility model adopts a filter frame that can be quickly disassembled and assembled. The extension is attached to the limiting plate and is equipped with a handle. Operators can disassemble and clean the filter frame without tools, avoiding the downtime caused by frequent clogging of traditional fixed filter screens and improving maintenance efficiency. In addition, the water inlet and outlet of the water pipe extend into the filter frame to ensure that all water is filtered, thus improving the filtration effect. (2) The adsorption plate in this utility model is made of glass fiber reinforced polypropylene material, which has strong oleophilicity and fast oil film adhesion speed. At the same time, the rotating roller drives the adsorption plate to rotate continuously, and the scraper scrapes off the oil film, resulting in high oil scraping efficiency. In addition, the lower partition and the upper partition form an "S" shaped water flow channel, which prolongs the residence time of the water flow in the tank. Furthermore, the ultrasonic generator destroys the oil-water emulsion structure, causing small oil droplets to quickly aggregate into large oil droplets and float to the surface, so that the oil concentration of the treated effluent meets or is lower than the discharge standard. (3) The observation port on the box cover of this utility model is combined with a sliding cover, so that the operator can open the observation port at any time to check the separation status inside the box, and keep track of the accumulation of impurities and the oil-water separation status in a timely manner, so as to avoid the problem of excessive maintenance or untimely maintenance due to the inability to monitor directly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a schematic diagram of the installation of the oil scraping component in this utility model; Figure 5 This is a schematic diagram of the oil scraping component in this utility model; Figure 6 This is a side view of the oil scraping component in this utility model; Figure 7 This is a schematic diagram of the structure of the impurity filtration component in this utility model; Figure 8 yes Figure 1 Enlarged view of point A in the middle; Figure 9 yes Figure 5 Enlarged view of point B in the middle.

[0013] Reference numerals in the attached diagram: 1-Box body; 2-Box cover; 3-Observation port; 4-Sliding cover; 5-Water inlet pipe; 6-Water outlet pipe; 7-Lower partition; 8-Upper channel; 9-Upper partition; 10-Lower channel; 11-Ultrasonic generator; 12-Filter frame; 13-Limiting plate; 14-Extension; 15-Handle; 16-Mounting plate; 17-Rotating roller; 18-Driven gear; 19-Drive motor; 20-Drive gear; 21-Adsorption plate; 22-Notch; 23-Scraper; 24-Oil collection hopper; 25-Baffle; 26-Oil outlet pipe; 27-Slide rail; 28-Slide groove. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0015] Example 1: like Figure 1 , 2 As shown in Figure 3, this utility model discloses a technical solution: a bilge water separator, including a hollow box 1. The top of the box 1 is fixed with a box cover 2 by bolts. An observation port 3 is opened on the right side of the box cover 2. A sliding cover 4 is installed at the observation port 3 and can slide left and right along the box cover 2. A water inlet pipe 5 communicating with the interior is provided on the right side wall of the box 1, and a water outlet pipe 6 communicating with the interior is provided on the left side wall of the box 1. The height of the water inlet pipe 5 is higher than the height of the water outlet pipe 6, and the water flow is achieved naturally by utilizing the height difference.

[0016] Inside the tank 1, below the outlet of the inlet pipe 5, an impurity filter assembly is installed to initially filter large particulate impurities in the bilge water. At the top of the tank 1, an oil skimmer assembly is installed to efficiently adsorb and remove oil from the water surface. Multiple lower baffles 7 are located at the bottom of the tank 1 between the inlet pipe 5 and the outlet pipe 6. An upper channel 8 for water supply is provided between the lower baffles 7 and the oil skimmer assembly. An upper baffle 9 is located on the side of the lower baffles 7 facing the inlet pipe 5. The top of the upper baffle 9 is connected to the oil skimmer assembly, and a lower channel 10 for water supply is provided between the lower part of the upper baffle 9 and the bottom of the tank 1. The upper channel 8 and the lower channel 10 are interconnected, forming an "S"-shaped water flow channel to extend the water residence time. An upper baffle 9 is also located on the left side of the oil skimmer assembly. In this embodiment, two lower baffles 7 are bolted to the bottom of the tank 1, and three upper baffles 9 are bolted to the oil skimmer assembly.

[0017] An ultrasonic generator 11 is installed at the bottom of the box 1 between the two lower partitions 7 and between the lower partitions 7 and the inner wall of the box 1. The ultrasonic generator 11 is used to break the oil-water emulsion structure by ultrasonic vibration, thereby improving the oil-water separation efficiency. The ultrasonic generator 11 is existing technology and can be purchased from the market. Its specific structure and principle will not be described here.

[0018] Example 2: like Figure 3 , 7As shown, this utility model discloses another technical solution, a bilge water separator, which differs from embodiment 1 in that the impurity filtration assembly includes a filter frame 12 and two longitudinally arranged limiting plates 13. The front and rear ends of the limiting plates 13 are respectively connected to the front and rear sides of the tank 1. The upper left and right sides of the filter frame 12 are integrally provided with extension parts 14 extending outward. The filter frame 12 overlaps with the two limiting plates 13 through the extension parts 14, realizing the quick assembly and disassembly of the filter frame 12. The side walls and bottom of the filter frame 12 are provided with several filter holes (pore diameter 50-100 mesh), which can effectively intercept large particle impurities. The upper front and rear sides of the filter frame 12 are also welded or bolted with handles 15, which are convenient for operators to grab and disassemble. The outlet of the water inlet pipe 5 extends into the filter frame 12 to ensure that all incoming water is filtered before entering the tank 1.

[0019] Example 3: like Figure 4 , 5 As shown in Figure 6, this utility model discloses another technical solution, a bilge water separator, which differs from embodiment 1 in that the oil skimming assembly includes a mounting plate 16 inclined from back to front at an angle of 15-20°. The rear side of the mounting plate 16 is bolted to the rear side of the inner side of the housing 1. A rotating roller 17 is rotatably connected to the lower surface of the mounting plate 16 via two left and right bearings. Driven gears 18 are fixedly sleeved at both ends of the rotating roller 17. A drive motor 19 is fixedly mounted on the left and right sides of the upper surface of the mounting plate 16 via a motor mount. A drive gear 20 is fixedly sleeved at the output end of the drive motor 19. The drive gear 20 meshes with the corresponding driven gear 18, and the rotating roller 17 is driven to rotate stably through gear transmission.

[0020] Specifically, multiple circular adsorption plates 21 for adsorbing oil stains on the water surface are fixedly installed on the side wall of the rotating roller 17 along its length. The upper part of the adsorption plate 21 passes through the upper surface of the mounting plate 16 through the notch 22 on the mounting plate 16, such as... Figure 9 As shown, scrapers 23 are bolted to both sides of the notch 22. The scrapers 23 are made of rubber and are located at the front of the adsorption plate 21. The sidewall of the scraper 23 abuts against the sidewall of the adsorption plate 21, with a contact pressure of 0.5-1 N / cm², ensuring that the oil film on the adsorption plate 21 is completely scraped off. Figure 6 For example, the rotating roller 17 and the adsorption plate 21 are driven to rotate counterclockwise by gear transmission. When the oil film rotates counterclockwise in the same way, it will be scraped off by the scraper 23.

[0021] Specifically, the front side of the mounting plate 16 is also fixed with an inclined oil collection hopper 24 by bolts, with an inclination angle of 20-25°. Both sides of the oil collection hopper 24 are welded with baffles 25 to prevent oil from flowing out from the side, with a height of 5-8cm. The front side of the oil collection hopper 24 is connected to the front side of the box 1. The front side of the box 1 is provided with an oil outlet pipe 26 that communicates with the upper part of the oil collection hopper 24. The scraped oil flows into the oil outlet pipe 26 along the oil collection hopper 24, realizing the centralized collection and discharge of oil.

[0022] Specifically, the adsorption plate 21 is made of glass fiber reinforced polypropylene. This material has an oleophilic contact angle of 25-30°, which allows for fast oil film adhesion and prevents it from falling off. It is also resistant to seawater and fuel corrosion, has high mechanical strength, and is suitable for long-term underwater operations.

[0023] Example 4: like Figure 1 , 8 As shown, this utility model discloses another technical solution, a bilge water separator, which differs from embodiment 1 in that the front and rear sides of the observation port 3 are bolted with transverse slide rails 27, the slide rails 27 are T-shaped, and the bottom of the sliding cover 4 is provided with a T-shaped slide groove 28 that cooperates with the slide rails 27. The sliding cover 4 can move left and right along the slide rails 27. The operator can open the observation port 3 by sliding the sliding cover 4 to observe the accumulation of impurities, oil-water separation and working status of the oil scraping component in the tank 1 in real time, which is convenient for timely maintenance.

[0024] The working process of this application: 1. The bilge water flows into the filter frame 12 through the inlet pipe 5. The filter holes of the filter frame 12 intercept large particles of impurities (such as silt and rust) in the water. The filtered water flows into the right side area inside the tank 1. The operator can open the observation port 3 by sliding the cover 4 to check the accumulation of impurities in the filter frame 12 regularly. When there are many impurities, the filter frame 12 can be removed from the limit plate 13 by the handle 15 for cleaning. After cleaning, it can be reattached to the limit plate 13. 2. The filtered water gradually accumulates in the right-side area of ​​the tank 1. When the water level rises to the height of the lower channel 10, the water flows through the lower channel 10 into the area between the lower partitions 7, and then slowly flows to the left along the "S"-shaped channel (lower channel 10 → upper channel 8). During this process, the ultrasonic generator 11 is activated, generating 30kHz ultrasonic vibrations, which disrupt the oil-water emulsion structure in the water, causing small oil droplets to aggregate into large oil droplets and gradually float to the surface. As the water gradually flows to the left, most of the oil on the surface remains in the right-side area, thus gradually reducing the oil content in the water flowing to the left. 3. The drive motor 19 starts and drives the rotating roller 17 to rotate at a speed of 15 r / min through the meshing of the drive gear 20 and the driven gear 18. The adsorption plate 21 on the rotating roller 17 rotates with it. When the adsorption plate 21 rotates to the water, its surface quickly adsorbs the oil on the water surface (because the PP-GF20 material has strong oleophilicity). Then the adsorption plate 21, carrying the oil film, rotates through the notch 22 to the top of the mounting plate 16. At this time, the scraper 23 contacts the side wall of the adsorption plate 21 and completely scrapes off the oil film on the adsorption plate 21. The scraped oil falls into the oil collection hopper 24 and flows into the oil outlet pipe 26 along the inclined surface of the oil collection hopper 24, realizing the centralized collection and discharge of oil. 4. After oil-water separation, the water continues to flow to the left along the "S"-shaped channel and is eventually discharged from tank 1 through outlet pipe 6. Before discharge, if it is necessary to further ensure the quality of the discharged water, an oil concentration sensor (such as model CY-100, with a detection accuracy of ≤5ppm) can be installed on outlet pipe 6. When the oil concentration in the discharged water exceeds 10ppm, the sensor sends a signal to the ship control system, suspends drainage, and starts the ultrasonic generator 11 to enhance demulsification. After the oil concentration drops below the standard, drainage is resumed, achieving dual protection.

[0025] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bilge water separator, comprising an internally hollow housing (1), characterized in that: The top of the box (1) is provided with a box cover (2), and an observation port (3) is provided on one side of the box cover (2). A sliding cover (4) is installed at the observation port (3). A water inlet pipe (5) is provided on the side of the box (1) near the observation port (3), and a water outlet pipe (6) is provided on the side of the box (1) away from the observation port (3). The height of the water inlet pipe (5) is higher than the height of the water outlet pipe (6). An impurity filter assembly is installed inside the box (1) below the outlet of the water inlet pipe (5). An oil scraping assembly is installed at the top of the box (1), and multiple lower partitions are provided at the bottom of the box (1) between the water inlet pipe (5) and the water outlet pipe (6). (7) An upper channel (8) for water supply is provided between the lower partition (7) and the oil scraping assembly. An upper partition (9) is provided on the side of the lower partition (7) facing the water inlet pipe (5). The top of the upper partition (9) is connected to the oil scraping assembly. A lower channel (10) for water supply is provided between the lower part of the upper partition (9) and the bottom of the box (1). The upper channel (8) and the lower channel (10) are connected. An upper partition (9) is also provided on the side of the oil scraping assembly facing the water outlet pipe (6). An ultrasonic generator (11) installed at the bottom of the box (1) is provided between adjacent lower partitions (7) and between the lower partitions (7) on both sides and the inner wall of the box (1).

2. The bilge water separator according to claim 1, characterized in that: The impurity filtration assembly includes a filter frame (12) and two left and right limiting plates (13). The upper left and right sides of the filter frame (12) are provided with extensions (14). The filter frame (12) overlaps with the two limiting plates (13) through the extensions (14). The side walls and bottom of the filter frame (12) are provided with several filter holes. The upper front and rear sides of the filter frame (12) are also provided with handles (15). The outlet of the water inlet pipe (5) extends into the filter frame (12).

3. The bilge water separator according to claim 1, characterized in that: The oil scraping assembly includes a mounting plate (16) inclined from back to front. The rear side of the mounting plate (16) is connected to the rear side of the housing (1). The lower surface of the mounting plate (16) is rotatably connected to a rotating roller (17) through two left and right bearings. Both ends of the rotating roller (17) are fixedly fitted with driven gears (18). The upper surface of the mounting plate (16) is fixedly mounted with a drive motor (19) on both the left and right sides. The output end of the drive motor (19) is fixedly fitted with a drive gear (20). The drive gear (20) meshes with the corresponding driven gear (18).

4. The bilge water separator according to claim 3, characterized in that: The sidewall of the rotating roller (17) is provided with a plurality of adsorption plates (21) for adsorbing oil stains on the water surface along its length direction. The upper part of the adsorption plate (21) passes through the upper surface of the mounting plate (16) through the notch (22) on the mounting plate (16). Scrapers (23) are fixedly installed on both the left and right sides of the notch (22). The scraper (23) is located in front of the adsorption plate (21), and the sidewall of the scraper (23) abuts against the sidewall of the adsorption plate (21).

5. The bilge water separator according to claim 4, characterized in that: The front side of the mounting plate (16) is also provided with an inclined oil collection hopper (24). Both sides of the oil collection hopper (24) are provided with baffles (25) to prevent oil from flowing out from the side. The front side of the oil collection hopper (24) is connected to the front side of the box (1). The front side of the box (1) is provided with an oil outlet pipe (26) that communicates with the upper part of the oil collection hopper (24).

6. The bilge water separator according to claim 5, characterized in that: The adsorption plate (21) is made of glass fiber reinforced polypropylene.

7. The bilge water separator according to claim 1, characterized in that: The observation port (3) is provided with slide rails (27) on both the front and rear sides, and the bottom of the sliding cover (4) is provided with a slide groove (28) that cooperates with the slide rails (27). The sliding cover (4) can move left and right along the slide rails (27).

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