Tank bottom oily water treatment system

Abstract

The invention relates to the technical field of bilge water treatment, and discloses a bilge oily water treatment system which comprises a bilge water tank, a clarification cabinet, a sewage pump, an oil-water separation device, a first sewage pipe, a second sewage pipe and a third sewage pipe, and the first sewage pipe and the second sewage pipe are connected with the clarification cabinet; the third sewage pipe is connected to the bilge water tank and the first sewage pipe, the sewage pump is installed on the first sewage pipe, the first sewage pipe is connected with a sewage branch pipe used for being connected with the bilge water tank, and the clarification cabinet and the bilge water tank are connected with a clear water pipeline. The clarifying cabinet is provided with a filter screen, an oil removal belt and a driving motor, the filter screen is arranged on the lower side of an outlet of the sewage pipe, the driving motor is in transmission connection with the oil removal belt, and the oil removal belt is provided with an immersion section located below the liquid level of oily water; and a fourth sewage pipe and a purified water pipeline are connected between the oil-water separation device and the bilge water tank. The advantages of rapid oil removal of the clarification cabinet and deep separation of the oil-water separation device are fully combined, so that the operation cost of water treatment on the ship is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bilge water treatment, and particularly to a bilge oil sewage treatment system. Background Art

[0002] As the tonnage of ships increases, the amount of bilge oil sewage generated by engine room equipment is increasing. If the bilge oil sewage is not treated in time, it will not only cause corrosion to the hull structure, and the mechanical and electrical equipment may be damaged by moisture or immersion, but also affect the normal operation of the crew's turbine equipment, and the work of the crew to clean the bilge water daily is heavy.

[0003] Among them, the oily bilge water on the ship mainly includes: First, the oil and water leaked due to poor sealing of the main engine, auxiliary engine, various equipment, valve accessories and pipeline joints; Second, the lubricating oil leaked during the normal operation of the turbine and auxiliary engine equipment; Third, the condensed water discharged from the air compressor and air bottle, and the discharged water from the steam distribution station and steam pipeline; Fourth, the flushing wastewater used to clean the equipment parts such as oil filters, centrifugal separators, and fuel supply units; Fifth, the oily sewage discharged from pipelines such as water tanks and oil tanks to the bottom pit of the engine room and the front and rear sewage wells. After various types of bilge oil sewage are combined together, the composition is complex. Usually, a bilge water tank is configured on the ship to store the bilge oil sewage, and an oil-water separator is used to separate the oil and water in the bilge water tank.

[0004] As the storage time of the bilge oil sewage in the bilge water tank becomes longer, the bilge oil sewage is prone to emulsification, and it is difficult to separate the emulsified oil. In addition, if the oil-water separator is used frequently to shorten the storage time, the consumption of the filter element is large, and the water treatment cost is high. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the storage time of the oil sewage in the bilge water tank is long, the bilge oil sewage is prone to emulsification, and it is difficult to separate the emulsified oil; and if the oil-water separator is used frequently to shorten the storage time, the consumption of the filter element is large, and the water treatment cost is high.

[0006] In order to solve the above technical problems, the present invention provides a technical solution for a bilge oil sewage treatment system:

[0007] The bilge oil sewage treatment system includes a bilge water tank, a clarification tank, a sewage pump, an oil-water separation device, a first sewage pipe, a second sewage pipe and a third sewage pipe. The first sewage pipe and the second sewage pipe are respectively connected to the clarification tank. The first sewage pipe is used to collect the oil sewage in the sewage well, the bottom void space and the isolation void space, and the second sewage pipe is used to collect the oil sewage generated by the ship's equipment;

[0008] The third sewage pipe is connected between the bilge tank and the first sewage pipe. The sewage pump is installed on the first sewage pipe. A branch interface is provided on the first sewage pipe between the sewage pump and the clarification tank. A sewage branch pipe is connected between the branch interface and the bilge tank, and a clean water pipeline is connected between the clarification tank and the bilge tank;

[0009] The clarification tank is provided with a filter screen, an oil removal belt and a driving motor. The filter screen is correspondingly arranged below the outlets of the first sewage pipe and the second sewage pipe. The driving motor is installed on the upper part of the clarification tank. The driving motor is in transmission connection with the oil removal belt, and the oil removal belt has an immersion section located below the oil sewage liquid level;

[0010] The oil-water separation device is provided with a water inlet and a water outlet. A fourth sewage pipe is connected between the water inlet and the bilge tank. A clean water pipeline is connected between the water outlet and the bilge tank for circulating the purified water after separating the oil and grease back to the bilge tank.

[0011] Further, the oil removal belt is a stainless steel ring belt. Scraping blades and oil collecting tanks are installed on the outer side of the oil removal belt. The oil collecting tanks are arranged above the immersion section. The scraping blades are arranged above the oil collecting tanks and are in scraping cooperation with the oil removal belt. The oil collecting tanks are used for collecting the oil and grease adhered to the oil removal belt.

[0012] Further, a liquid level sensor is also installed on the upper part of the clarification tank. The liquid level sensor is electrically connected to the sewage pump. The liquid level sensor is used for detecting the liquid level in the clarification tank to send a pump stop signal to the sewage pump when the liquid level reaches a set height.

[0013] Further, the clarification tank is also provided with an oil and grease pipe. One end of the oil and grease pipe is respectively connected to the upper surface of the filter screen and the oil collecting tank. The other end of the oil and grease pipe is provided with an oil residue tank.

[0014] Further, it also includes a rear sewage well. A fifth sewage pipe is also connected between the rear sewage well and the first sewage pipe. The fifth sewage pipe is arranged in parallel with the third sewage pipe.

[0015] Further, it also includes a front sewage well, an isolation empty tank, a sewage well under the main engine base and a double-bottom empty tank. The front sewage well, the isolation empty tank, the sewage well under the main engine base and the double-bottom empty tank are respectively connected to the first sewage pipe.

[0016] Further, the first sewage pipe is also provided with a reserved branch for collecting the bilge water from the empty tank in the cargo hold area.

[0017] Furthermore, the bilge water tank is also connected to a sixth sewage pipe, and the sixth sewage pipe is used to be connected to the main engine chemical cleaning system.

[0018] Furthermore, a first valve is installed on the first sewage pipe near the clarification tank, and a second valve is installed on the sewage branch pipe near the branch interface.

[0019] Furthermore, the second sewage pipes are provided in plurality, and the plurality of the second sewage pipes are respectively used to be connected to the high-temperature / low-temperature fresh water expansion tank, the overflow port of the engine room sewage treatment device, the discharge port of the ash and rainwater collection cabinet, and the discharge port of the incinerator system.

[0020] Compared with the prior art, the bilge oily sewage treatment system of the present invention has the following beneficial effects: the bilge oily sewage treatment system adopts the design form of a bilge water tank, a clarifier, a sewage pump, an oil-water separation device, a first sewage pipe, a second sewage pipe and a third sewage pipe. The first sewage pipe and the second sewage pipe are respectively connected to the clarifier. The first sewage pipe collects oily sewage from sewage wells, bottom empty tanks and isolation empty tanks. Such sewage usually contains more solid impurities. The second sewage pipe collects oily sewage generated by equipment on board, and the oil pollution concentration is relatively high. Multi-source sewage is classified and collected through dual pipelines to avoid mixing of sewage of different properties, which increases the difficulty of treatment and improves the efficiency of subsequent treatment. The third sewage pipe connects the bilge water tank with the first sewage pipe, and can return the sewage temporarily stored in the bilge water tank to the treatment process, shortening the storage time of oily sewage in the bilge water tank and effectively alleviating the emulsification of oily sewage.

[0021] Among them, a sewage branch pipe is connected between the branch interface on the first sewage pipe and the bilge water tank, which can dynamically adjust the flow entering the clarification cabinet according to the amount of sewage to prevent the treatment system from overloading. When the water level in the clarification cabinet is high, part of the sewage is directly diverted to the bilge water tank for storage through the sewage branch pipe, which can balance the system treatment pressure in time. In addition, the clarification cabinet is provided with a filter, an oil removal belt and a drive motor. The filter is arranged at the lower side of the outlet of the first sewage pipe and the second sewage pipe, which can intercept impurities such as mud, rust, etc. in the sewage. The drive motor is connected to the oil removal belt by transmission, and the immersion section of the oil removal belt is placed below the liquid surface of the oily sewage. By using the difference in adhesion between the dirty oil and water, the oil removal belt can effectively absorb the floating oil part in the sewage. The drive motor drives the oil removal belt to rotate in a cycle, thereby achieving the purpose of continuous oil separation and collection, and the oil removal efficiency is higher than that of gravity separation.

[0022] In addition, a clear water pipeline is connected between the clarification tank and the bilge water tank, which can return the preliminarily filtered low oil content sewage to the bilge water tank, meeting the subsequent flushing water demand and reducing the treatment pressure of deep oil removal. A fourth sewage pipe is connected between the water inlet of the oil-water separation device and the bilge water tank. The oil sewage can be deeply treated by the oil-water separation device to ensure that the oil content of the stored water in the bilge water tank meets the discharge standard and water use requirements. A purified water pipeline is connected between the water outlet of the oil-water separation device and the bilge water tank, realizing the closed-loop utilization of the ship's water resources. It is the collaborative treatment of the clarification tank and the oil-water separation device that fully combines the advantages of rapid oil removal of the clarification tank and deep separation of the oil-water separation device, reducing the consumption of filter elements in the oil-water separation device, thereby reducing the operation cost of ship water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall schematic diagram of the bilge oil sewage treatment system in an embodiment of the present invention;

[0024] Figure 2 is the partial schematic diagram of the bilge oil sewage treatment system in an embodiment of the present invention;

[0025] Figure 3 is the internal structure schematic diagram of the clarification tank in an embodiment of the present invention;

[0026] Figure 4 is the front view schematic diagram of the oil removal belt and the oil collection tank in an embodiment of the present invention;

[0027] Figure 5 is the side view schematic diagram of the oil removal belt and the oil collection tank in an embodiment of the present invention;

[0028] In the figure: 1. Bilge water tank; 11. First sewage pipe; 111. Sub-interface; 112. Sewage branch pipe; 113. Clear water pipeline; 114. Reserved branch; 115. First valve; 116. Second valve; 12. Second sewage pipe; 13. Third sewage pipe; 14. Fourth sewage pipe; 15. Fifth sewage pipe; 16. Sixth sewage pipe; 2. Clarification tank; 20. Partition board; 21. Filter screen; 22. Oil removal belt; 220. Immersion section; 23. Driving motor; 24. Oil scraping blade; 25. Oil collection tank; 26. Liquid level sensor; 27. Oil pollution pipe; 271. Oil discharge pipe; 272. Overflow pipe; 273. Sewage discharge pipe; 28. Oil residue tank; 3. Sewage pump; 4. Oil-water separation device; 41. Water inlet; 42. Water outlet; 43. Purified water pipeline; 51. Rear sewage well; 52. Front sewage well; 53. Isolation empty tank; 54. Sewage well under the main engine base; 55. Double-bottom empty tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. in the present invention is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As Figures 1 to 5 shown, an oily bilge water treatment system according to an embodiment of the present invention includes a bilge water tank 1, a clarifying tank 2, a sewage pump 3, an oil-water separation device 4, a first sewage pipe 11, a second sewage pipe 12, and a third sewage pipe 13. The first sewage pipe 11 and the second sewage pipe 12 are respectively connected to the clarifying tank 2. The first sewage pipe 11 is used to collect the oily sewage from the sewage well, the bottom void space, and the isolation void space 53. The second sewage pipe 12 is used to collect the oily sewage generated by the ship's equipment. The third sewage pipe 13 is connected between the bilge water tank 1 and the first sewage pipe 11. The sewage pump 3 is installed on the first sewage pipe 11. A branch interface 111 is provided between the first sewage pipe 11 where it is located between the sewage pump 3 and the clarifying tank 2. A sewage branch pipe 112 is connected between the branch interface 111 and the bilge water tank 1, and a clear water pipeline 113 is connected between the clarifying tank 2 and the bilge water tank 1.

[0034] The clarification cabinet 2 is provided with a filter screen 21, an oil removal belt 22 and a driving motor 23. The filter screen 21 is arranged at the lower side of the outlet of the first sewage pipe 11 and the second sewage pipe 12 respectively. The driving motor 23 is installed on the upper part of the clarification cabinet 2. The driving motor 23 is transmission-connected to the oil removal belt 22, and the oil removal belt 22 has an immersion section 220 located below the liquid surface of the oily sewage. The oil-water separation device 4 is provided with a water inlet 41 and a drain 42. A fourth sewage pipe 14 is connected between the water inlet 41 and the bilge water tank 1. A clean water pipeline 43 is connected between the drain 42 and the bilge water tank 1, which is used to circulate the clean water after the oil pollution is separated to the bilge water tank 1.

[0035] The bilge oily sewage treatment system adopts the design form of bilge water tank 1, clarification cabinet 2, sewage pump 3, oil-water separation device 4, first sewage pipe 11, second sewage pipe 12 and third sewage pipe 13. The first sewage pipe 11 and the second sewage pipe 12 are connected to the clarification cabinet 2 respectively. The first sewage pipe 11 collects oily sewage from sewage well, bottom empty tank and isolation empty tank 53. Such sewage usually contains more solid impurities. The second sewage pipe 12 collects oily sewage generated by equipment on board, and the oil pollution concentration is relatively high. Through dual pipelines, multi-source sewage is classified and collected to avoid mixing of sewage of different properties, which increases the difficulty of treatment and improves the efficiency of subsequent treatment. The third sewage pipe 13 connects the bilge water tank 1 with the first sewage pipe 11, and can return the sewage temporarily stored in the bilge water tank 1 to the treatment process, shortening the storage time of oily sewage in the bilge water tank 1 and effectively alleviating the emulsification of oily sewage.

[0036] Among them, a sewage branch pipe 112 is connected between the branch interface 111 on the first sewage pipe 11 and the bilge tank 1, and the flow rate entering the clarification cabinet 2 can be dynamically adjusted according to the amount of sewage to prevent the treatment system from being overloaded. When the water level in the clarification cabinet 2 is high, part of the sewage is directly diverted to the bilge tank 1 for storage through the sewage branch pipe 112, which can balance the system treatment pressure in time. In addition, the clarification cabinet 2 is provided with a filter 21, an oil removal belt 22 and a drive motor 23. The filter 21 is arranged at the lower side of the outlet of the first sewage pipe 11 and the second sewage pipe 12, and can intercept impurities such as mud, rust, etc. in the sewage. The drive motor 23 is connected to the oil removal belt 22 in a transmission manner, and the immersion section 220 of the oil removal belt 22 is placed below the liquid surface of the oily sewage. By using the difference in adhesion between the dirty oil and water, the oil removal belt 22 can effectively absorb the floating oil part in the sewage. The drive motor 23 drives the oil removal belt 22 to rotate in a cycle, thereby achieving the purpose of continuous oil separation and collection, and the oil removal efficiency is higher than that of gravity separation.

[0037] In addition, a clean water pipeline 113 is connected between the clarification tank 2 and the bilge water tank 1, and the preliminarily filtered low oil content sewage can be refluxed to the bilge water tank 1, which can meet the subsequent flushing water demand and reduce the treatment pressure of deep oil removal. A fourth sewage pipe 14 is connected between the water inlet 41 of the oil-water separation device 4 and the bilge water tank 1. The oil-water separation device 4 can deeply treat the oily sewage to ensure that the oil content of the stored water in the bilge water tank 1 meets the discharge standard and water use requirements. A clean water pipeline 43 is connected between the drain outlet 42 of the oil-water separation device 4 and the bilge water tank 1, realizing the closed-loop utilization of the ship's water resources. It is the collaborative treatment of the clarification tank 2 and the oil-water separation device 4 that fully combines the advantages of rapid oil removal of the clarification tank 2 and deep separation of the oil-water separation device 4, reduces the consumption of the filter element in the oil-water separation device 4, and thus reduces the operation cost of ship water treatment.

[0038] In this embodiment, the oil removal belt 22 is a stainless steel ring belt, and an oil scraping blade 24 and an oil collecting tank 25 are installed on the outer side of the oil removal belt 22. As Figures 3 to 5 shown, the oil collecting tank 25 is arranged on the upper side of the immersion section 220, the oil scraping blade 24 is arranged on the upper side of the oil collecting tank 25 and is in scraping cooperation with the oil removal belt 22, and the oil collecting tank 25 is used to collect the oil adhered to the oil removal belt 22. During the cyclic rotation of the oil removal belt 22, the oil removal belt 22 can adhere to the oil and move along with it. After passing through the oil scraping blade 24, the adhered oil is scraped off and flows into the oil collecting tank 25, achieving the purpose of continuous and efficient adhesion and separation of oil. Moreover, a liquid level sensor 26 is also installed on the upper part of the clarification tank 2. The liquid level sensor 26 is electrically connected to the sewage pump 3. The liquid level sensor 26 is used to detect the liquid level in the clarification tank 2, and send a pump stop signal to the sewage pump 3 when the liquid level reaches the set height, preventing the overload of the sewage input volume and ensuring the preliminary decontamination effect.

[0039] As a further preferred solution, the clarification tank 2 is also provided with an oil pipe 27. One end of the oil pipe 27 is respectively connected to the upper surface of the filter net 21 and the oil collecting tank 25, and the other end of the oil pipe 27 is provided with an oil residue tank 28. Through the oil pipe 27, the oil impurities intercepted by the filter net 21 and the oil in the oil collecting tank 25 can be diverted to the oil residue tank 28. A partition plate 20, an oil drain pipe 271, an overflow pipe 272 and a sewage drain pipe 273 are also arranged inside the clarification tank 2. The partition plate 20 divides the interior into a first cavity where the filter net 21 is located and a second cavity where the oil removal belt 22 is located, reducing the influence of the water inlet impact on the fluctuation of the oil surface and ensuring that the oil removal belt 22 can stably adhere to the oil.

[0040] It should be noted that the inlet of the drain pipe 271 is arranged upward and higher than the water surface of the oily sewage, so that the floating oil on the upper layer of the water surface can flow into the oil residue tank 28 through the drain pipe 271. The outlet height of the overflow pipe 272 is the set maximum liquid level. When the oily sewage in the clarifying tank 2 reaches the set maximum liquid level, the overflow pipe 272 can directly discharge the oily sewage therein. The inlet of the sewage discharge pipe 273 is close to the bottom wall of the clarifying tank 2, and a sewage discharge valve is also installed on the sewage discharge pipe 273 to smoothly discharge the internal sludge when there is a large accumulation of bottom sludge at the bottom to ensure the preliminary water treatment effect.

[0041] In this embodiment, the bottom oil sewage treatment system further includes a rear sewage well 51. A fifth sewage pipe 15 is also connected between the rear sewage well 51 and the first sewage pipe 11, and the fifth sewage pipe 15 is arranged in parallel with the third sewage pipe 13. In addition, the bottom oil sewage treatment system further includes a front sewage well 52, an isolation empty tank 53, a sewage well under the main engine base 54, and a double-bottom empty tank 55. The front sewage well 52, the isolation empty tank 53, the sewage well under the main engine base 54, and the double-bottom empty tank 55 are respectively connected to the first sewage pipe 11, thereby expanding the collection and treatment range of the bottom oil sewage.

[0042] Among them, the first sewage pipe 11 is also provided with a reserved branch 114, and the reserved branch 114 is used to collect the bilge water from the empty tank in the cargo hold area. The bilge water tank 1 is also connected with a sixth sewage pipe 16, and the sixth sewage pipe 16 is used to connect with the main engine chemical cleaning system, and the sewage after the main engine cleaning operation can be collected into the bilge water tank 1.

[0043] A first valve 115 is installed on the first sewage pipe 11 close to the clarifying tank 2, and a second valve 116 is installed on the sewage branch pipe 112 close to the sub-interface 111. The sewage branch pipe 112 serves as a standby pipeline. When the input amount of oily sewage to the clarifying tank 2 suddenly increases or the clarifying tank 2 fails, the first valve 115 is closed and the second valve 116 is opened, so that the oily sewage directly flows back to the bilge water tank 1, ensuring the operation reliability of the entire bottom oil sewage treatment system. In addition, there are multiple second sewage pipes 12, and the multiple second sewage pipes 12 are respectively used to connect with the high-temperature / low-temperature fresh water expansion tank, the overflow port of the engine room sewage treatment device, the discharge port of the soot and rainwater collection tank, and the discharge port of the incinerator system.

[0044] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. An oily bilge water treatment system, characterized in that, It includes a bilge tank, a clarifier, a sewage pump, an oil-water separator, a first sewage pipe, a second sewage pipe and a third sewage pipe. The first sewage pipe and the second sewage pipe are respectively connected to the clarifier. The first sewage pipe is used to collect the oily sewage from the bilge well, the bottom void space and the isolation void space, and the second sewage pipe is used to collect the oily sewage generated by the ship's equipment. The third sewage pipe is connected between the bilge tank and the first sewage pipe. The sewage pump is installed on the first sewage pipe. A branch interface is provided between the sewage pump and the clarifier on the first sewage pipe. A sewage branch pipe is connected between the branch interface and the bilge tank, and a clear water pipeline is connected between the clarifier and the bilge tank. The clarifier is provided with a filter screen, an oil removal belt and a driving motor. The filter screen is correspondingly arranged below the outlets of the first sewage pipe and the second sewage pipe. The driving motor is installed on the upper part of the clarifier. The driving motor is in transmission connection with the oil removal belt, and the oil removal belt has an immersion section located below the liquid level of the oily sewage. The oil-water separator is provided with an inlet and a drain outlet. A fourth sewage pipe is connected between the inlet and the bilge tank, and a clean water pipeline is connected between the drain outlet and the bilge tank for circulating the purified water after separating the oil and grease back into the bilge tank.

2. The bilge water treatment system according to claim 1, characterized in that, The oil removal belt is a stainless steel ring belt. A scraping blade and an oil collecting tank are installed on the outer side of the oil removal belt. The oil collecting tank is arranged above the immersion section. The scraping blade is arranged above the oil collecting tank and is in scraping cooperation with the oil removal belt. The oil collecting tank is used to collect the oil and grease adhered to the oil removal belt.

3. The bilge water treatment system according to claim 2, wherein A liquid level sensor is also installed on the upper part of the clarifier. The liquid level sensor is electrically connected to the sewage pump. The liquid level sensor is used to detect the liquid level in the clarifier to send a pump stop signal to the sewage pump when the liquid level reaches the set height.

4. The bilge water treatment system according to claim 3, characterized in that, The clarifier is also provided with an oil and grease pipe. One end of the oil and grease pipe is respectively connected to the upper surface of the filter screen and the oil collecting tank, and the other end of the oil and grease pipe is provided with an oil residue tank.

5. The bilge water treatment system according to any one of claims 1 to 4, characterized in that, It also includes a rear sewage well. A fifth sewage pipe is also connected between the rear sewage well and the first sewage pipe. The fifth sewage pipe is arranged in parallel with the third sewage pipe.

6. The bilge water treatment system according to any one of claims 1 to 4, characterized in that, It also includes a front sewage well, an isolation void space, a sewage well under the main engine base and a double bottom void space. The front sewage well, the isolation void space, the sewage well under the main engine base and the double bottom void space are respectively connected to the first sewage pipe.

7. The bilge water treatment system according to claim 6, characterized in that, The first sewage pipe is also provided with a reserved branch for collecting the bilge water from the void space in the cargo hold area.

8. The bilge water treatment system according to any one of claims 1 to 4, characterized in that, The bilge tank is also connected with a sixth sewage pipe for connecting with the main engine chemical cleaning system.

9. The bilge water treatment system according to any one of claims 1 to 4, characterized in that, A first valve is installed on the first sewage pipe near the clarifier, and a second valve is installed on the sewage branch pipe near the branch interface.

10. The bilge water treatment system according to any one of claims 1 to 4, characterized in that, There are multiple second sewage pipes. The multiple second sewage pipes are respectively used to connect with the high-temperature / low-temperature fresh water expansion tank, the overflow port of the engine room sewage treatment device, the drain port of the soot and rainwater collection tank, and the drain port of the incinerator system.

Images