Bilge water system, bilge water discharging method and ship

Abstract

The invention provides a bilge water system, a bilge water discharging method and a ship, and the aim of smoothly pumping out bilge water is achieved by optimizing a water pipeline system at the bilge of an existing ship. A collecting cabin is arranged in the bilge water system and used for collecting bilge sewage, and the bilge sewage is divided into a cabin entering pipeline, an outboard discharging pipeline and a shore discharging pipeline after being pumped out through a main pipe. The terminal of the cabin entering pipeline is communicated with the collecting cabin and is used for storing cabin bottom sewage; the terminal of the outboard discharging pipeline is communicated to the outside of a ship board and is used for discharging bilge sewage to a navigation sea area; and the terminal of the bank discharging pipeline communicates with the port and is used for discharging the bilge sewage to the port sewage receiving equipment, and by adopting the technical scheme provided by the invention, the bilge water can be smoothly discharged in different areas, so that smooth operation of a bilge water system and safe navigation of a ship are ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of shipbuilding, and in particular relates to a bilge water system, a bilge water discharge method and a ship. Background Art

[0002] Dual-fuel container ships are usually large in size, can accommodate a large number of containers, and have a strong carrying capacity. In the application scenario of dual-fuel container ships transporting flammable, explosive, toxic and other dangerous goods, if the dangerous goods are leaking, it will cause extremely serious safety accidents. Therefore, it is essential to equip the ship's water pipeline with a dedicated international maritime dangerous goods pump (abbreviated as "IMDG pump"), which is also an important ship protection system.

[0003] However, dual-fuel container ships equipped with IMDG pumps still have the problem that bilge water cannot be discharged in time or completely, which will also pose a great safety hazard in the long run. Therefore, it is necessary to design or optimize the bilge water piping system to further improve the ship's bilge water discharge capacity and ensure the safety of ship navigation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present application is to provide a bilge water system, a bilge water discharge method and a ship, so as to better solve the above-mentioned technical problems encountered in the existing bilge water discharge process.

[0005] In a first aspect, the present application provides a bilge water system, which is arranged at the bottom of a bow cargo hold, a stern cargo hold and an engine room, wherein a collecting tank is arranged in the bilge water system to collect bilge sewage, and further comprises:

[0006] The main pipe has one end connected to the sewage well and the other end divided into three routes, namely, an inlet pipeline, an overboard pipeline and a shore pipeline; the terminal of the inlet pipeline is connected to the collecting tank to store bilge sewage; the terminal of the overboard pipeline is connected to the outside of the ship's side to discharge the bilge sewage to the navigation sea area; the terminal of the shore pipeline is connected to the port to discharge the bilge sewage to the port sewage receiving equipment.

[0007] In an optional embodiment, the bilge water system further comprises:

[0008] a discharge pipeline, one end of which is connected to the collecting tank and the other end of which is connected to the overboard discharge pipeline, for discharging the bilge sewage in the collecting tank to the navigation sea area;

[0009] The collecting tank shore discharge branch pipe has one end connected to the collecting tank and the other end connected to the main pipe, and is connected to the shore discharge pipeline through the main pipe, so as to discharge the bilge sewage to the port sewage receiving equipment.

[0010] In an optional embodiment, the bilge water system further comprises:

[0011] A plurality of suction branch pipes have one end connected to a plurality of sewage wells respectively and the other end connected to the main pipe for conveying bilge sewage in the plurality of sewage wells to the main pipe; a first plate check valve and a first electric butterfly valve are sequentially arranged on the suction branch pipe along the fluid conveying direction.

[0012] In an optional embodiment, an IMDG pump and an automatic vent valve are sequentially arranged on the main pipe along the fluid conveying direction, and the IMDG pump and the automatic vent valve are both located after the connection point between the collection tank shore discharge branch pipe and the main pipe, and before the connection points between the tank inlet pipeline, the discharge pipeline, the shore discharge pipeline, the outboard discharge pipeline and the main pipe respectively.

[0013] In an optional implementation manner, the automatic vent valve includes a valve body, a valve stem, a float and a valve cap;

[0014] When gas accumulates in the automatic vent valve, the liquid level in the automatic vent valve drops, and the buoy drops, driving the valve stem to drop. At this time, the exhaust hole of the valve stem opens, and the gas in the bilge water pipe is discharged from the exhaust hole of the valve stem;

[0015] When the gas in the bilge water pipe is discharged, the liquid level of the automatic vent valve rises, the rise of the float drives the valve stem to become horizontal, and the exhaust hole of the valve stem is closed.

[0016] In an optional embodiment, the bilge water system includes a bow water system and a stern water system, which are used to treat bilge water in the bow cargo hold and the stern cargo hold, respectively.

[0017] In an optional embodiment, the bilge water system also includes a cabin water system, which is arranged between the bow water system and the stern water system to isolate the bow water system and the stern water system to form a bow water system and a stern water system that both operate independently.

[0018] In a second aspect, the present application provides a bilge water discharge method, using the bilge water system described in the above technical solution, the bilge water discharge method comprises:

[0019] When the ship sails to sea areas where it cannot discharge into the sea, the bilge sewage is transported to the main pipe and then transported to the collection tank through the cabin inlet pipeline to store the bilge sewage;

[0020] When the ship sails to the sea where it can be discharged, the bilge sewage is transported to the main pipe and discharged to the navigation sea through the overboard pipe;

[0021] When the ship sails to the port, the bilge sewage is transported to the main pipe and discharged to the port sewage receiving equipment through the shore discharge pipeline.

[0022] In an optional embodiment, the bilge water discharge method further comprises:

[0023] When the ship sails to the sea where it can be discharged, the bilge sewage stored in the collection tank is discharged to the navigation sea through the discharge pipe and the overboard pipe;

[0024] When the ship sails to the port, the bilge sewage stored in the collection tank is discharged to the port sewage receiving equipment through the collection tank shore discharge branch pipe and the shore discharge pipeline.

[0025] In the third aspect, the present application provides a ship, comprising an engine room and a bow cargo hold and a stern cargo hold located at both ends of the engine room, the bow cargo hold and / or the stern cargo hold comprising a plurality of cargo holds, and the height difference between the sewage well of at least one of the cargo holds and the height of the IMDG pump is greater than 30 meters, and the bilge water system as described in the above technical solution is arranged at the bottom of the cargo hold.

[0026] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0027] The technical solution provided by the present application achieves the purpose of smoothly pumping out bilge water by optimizing the existing water pipe system of the bilge of the ship. A collecting tank is set in the bilge water system to collect bilge sewage. After the bilge sewage is pumped out through the main pipe, it is divided into an inlet pipe, an overboard pipe and a shore pipe; the terminal of the inlet pipe is connected to the collecting tank to store bilge sewage; the terminal of the overboard pipe is connected to the outside of the ship's side to discharge bilge sewage to the navigation sea area; the terminal of the shore pipe is connected to the port to discharge bilge sewage to the port sewage receiving equipment. The technical solution provided by the present application can realize the smooth discharge of bilge water in different areas to ensure the smooth operation of the bilge water system and the safe navigation of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a schematic diagram of the arrangement of different compartments inside the ship;

[0029] Figure 2 Shown is a schematic diagram of the piping connections for the bilge water system;

[0030] Figures 3-4 Shown is a schematic diagram of the operating principle of the automatic vent valve.

[0031] Description of reference numerals:

[0032] 101, bow IMDG pump; 102, bow test valve; 103, automatic vent valve; 104, bow collection tank; 105, bow suction port; 106, first bow plate check valve; 107, first bow electric butterfly valve; 108, second bow plate check valve; 109, second bow electric butterfly valve; 110, first bow stop check valve; 111, first bow stop valve; 112, second bow stop check valve; 113, first bow shore valve; 114, second bow shore valve; 115, bow side valve; 116, third bow plate check valve; 117, third bow electric butterfly valve; 118, second bow stop valve; 119, bow sewage well;

[0033] 120, bow collecting tank suction port; 121, bow suction port branch pipe; 122, bow main pipe; 123, bow tank inlet pipeline; 124, bow overboard discharge pipeline; 125, bow shore discharge pipeline; 126, bow discharge pipeline; 127, bow collecting tank shore discharge branch pipe;

[0034] 201, stern IMDG pump; 202, stern test valve; 204, stern collection tank; 205, stern suction port; 206, first stern plate check valve; 207, first stern electric butterfly valve; 208, second stern plate check valve; 209, second stern electric butterfly valve; 210, first stern stop check valve; 211, first stern stop valve; 212, second stern stop check valve; 213, first stern shore valve; 214, second stern shore valve; 215, stern side valve; 216, third stern plate check valve; 217, third stern electric butterfly valve; 218, second stern stop valve; 219, stern sewage well;

[0035] 220, stern collecting tank suction port; 221, stern suction port branch pipe; 222, stern main pipe; 223, stern tank inlet pipeline; 224, stern overboard discharge pipeline; 225, stern shore discharge pipeline; 226, stern discharge pipeline; 227, stern collecting tank shore discharge branch pipe;

[0036] 301, first isolation valve; 302, first blind flange; 303, second isolation valve; 304, second blind flange; 310, cabin main pipe;

[0037] 1031. Valve body; 1032. Valve stem; 1033. Float; 1034. Valve bonnet. DETAILED DESCRIPTION

[0038] In the prior art, such as Figure 1As shown, taking a ship model with 10 cargo holds as an example, the whole ship is equipped with multiple IMDG pumps: one is configured at the bow of the ship, responsible for pumping holds 1-9, and one is configured at the stern, responsible only for pumping hold 10. There is an engine room isolation between the bow and stern cargo holds, and the engine room area has an independent bilge water system. When dangerous goods are loaded in the cargo hold area, the isolation valve in the engine room area must be kept closed. Bilge water is generated during navigation. In sea areas where it cannot be discharged, the bow IMDG pump (driven by compressed air) pumps the bilge water of the cargo hold area (holds 1-9) from the sewage well into the dangerous goods bilge water collection tank, and then discharges the bilge water overboard or to the shore in areas or ports where it can be discharged. The same is true for hold 10 of the stern cargo hold.

[0039] When the bow IMDG pump was pumping cargo holds 1-9, it was found that the bilge water in the sewage well of cargo hold 9 could not be smoothly transported to the dangerous goods bilge water collection tank at the bow. After analysis, the outlet pipeline is at the highest position, and the height of the pipeline from the IMDG pump is 30.3m, and the head loss is 0.303MPa; the total length of the pipeline from the bow IMDG pump to the sewage well of cabin 9 is 110m, the pipe diameter is DN80, and there are 23 90-degree elbows, 2 DN80 stop valves, and the maximum resistance is calculated to be 0.06572Mpa, and the total resistance is 0.369MPa. The flow rate of the selected IMDG pump is 25m3 / h, and the discharge pressure is 0.4MPa. Although the resistance loss is less than the discharge pressure of the pump, there is not enough margin. If air accumulates in the inlet pipeline, the self-priming capacity will decrease, and if air accumulates in the outlet pipeline, the outlet pressure will decrease, resulting in the pump capacity not being fully utilized and the bilge water being unable to be pumped out smoothly. Abnormalities and waste in the operation process cannot be discovered and resolved in time.

[0040] Therefore, the present application provides a bilge water system, a bilge water discharge method and a ship, which well solves various practical technical problems encountered in the bilge water discharge process. The following describes the implementation of the present application through specific examples, and those skilled in the art can easily understand other advantages and principles of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0041] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this patent, so they have no substantial technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by this patent, should still fall within the scope of the technical content disclosed by this patent. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this patent. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of this patent without substantial change in the technical content.

[0042] Embodiment 1:

[0043] See also Figures 1 to 4 This embodiment provides a bilge water system, which is arranged at the bottom of the bow cargo hold, the stern cargo hold and the engine room. The bilge water system is provided with a collecting tank for collecting bilge sewage. The bilge water system includes a bow water system and a stern water system, which are used to treat the bilge sewage in the bow cargo hold and the stern cargo hold respectively. The bow water system at the bottom of the bow cargo hold is described in detail below.

[0044] The bow water system includes a bow main pipe 122, the starting end of which is connected to the bow sewage well 119, and the other end is divided into three routes, namely a bow inlet pipeline 123, a bow overboard discharge pipeline 124 and a bow shore discharge pipeline 125; the terminal of the bow inlet pipeline 123 is connected to the bow collecting tank 104 for storing bow bilge sewage; the terminal of the bow overboard discharge pipeline 124 is connected to the outside of the ship's side for discharging bow bilge sewage to the navigation sea area; the terminal of the bow shore discharge pipeline 125 is connected to the port for discharging bow bilge sewage to the port sewage receiving equipment. Furthermore, a first bow stop check valve 110 is provided on the bow inlet pipeline 123, which has both the functions of a stop valve and a check valve, and can completely block the flow of sewage in the bow inlet pipeline 123 to prevent backflow. Furthermore, a shore discharge valve is also provided at the terminal of the bow shore discharge pipeline 125, including a first bow shore discharge valve 113 and a second bow shore discharge valve 114, so as to achieve efficient discharge of sewage at the port shore. Furthermore, a bow outboard discharge valve 115 is also provided at the terminal of the bow outboard discharge pipeline 124 to control the flow of sewage discharged to the outboard.

[0045] In an optional embodiment, the bow bilge water system further includes a bow discharge pipeline 126 and a bow collection tank shore discharge branch pipe 127. The starting end of the bow discharge pipeline 126 is connected to the bow collection tank 104, and the other end is connected to the bow overboard discharge pipeline 124, so as to discharge the bilge sewage in the bow collection tank 104 to the navigation sea area; the starting end of the bow collection tank shore discharge branch pipe 127 is connected to the bow collection tank 104, and the other end is connected to the bow main pipe 122, and is connected to the bow shore discharge pipeline 125 through the bow main pipe 122, so as to discharge the bow bilge sewage to the port sewage receiving equipment. Furthermore, a third bow plate check valve 116 is provided on the pipeline before the bow discharge pipeline 126 and the bow collection tank bank discharge branch pipe 127 branch to prevent sewage from being diverted back to the bow collection tank 104. A second bow stop valve 118 is also provided on the bow discharge pipeline 126. A third bow electric butterfly valve 117 is also provided on the bow collection tank bank discharge branch pipe 127.

[0046] In an optional embodiment, the bow collecting tank 104 has a bow suction port 105 to facilitate the pipeline to smoothly draw water from the collecting tank. The bow bilge water system also includes a plurality of bow suction branch pipes 121. For a ship with 9 cargo holds, there are 9 bow sewage wells 119, and 9 bow suction branch pipes 121 are correspondingly arranged to extract the accumulated sewage in each sewage well. The starting end of each bow suction branch pipe 121 is correspondingly connected to a plurality of bow sewage wells 119, and the other end is connected to the bow main pipe 122 to transport the bilge sewage in the plurality of sewage wells to the bow main pipe 122. Furthermore, a first bow plate check valve 106 and a first bow electric butterfly valve 107 are sequentially arranged on each bow suction branch pipe 121 along the fluid conveying direction. When sewage is normally pumped and transported, the first bow plate check valve 106 is opened. When sewage flows in the reverse direction, the first bow plate check valve 106 is closed to ensure that sewage does not flow back to the sewage well after pumping, protect the pipeline system and related equipment from damage by the backflow fluid, and improve drainage efficiency. The first bow electric butterfly valve 107 can adjust the opening and closing degree of the valve as needed, so as to accurately control the sewage flow of the bow suction branch pipe 121. Furthermore, a second bow plate check valve 108 and a second bow electric butterfly valve 109 are arranged in the front section of the bow main pipe 122 near the bow suction branch pipe 121 to control and accurately adjust the flow of the bow main pipe 122 and the flow direction of sewage.

[0047] In an optional embodiment, the bow main pipe 122 is provided with a bow IMDG pump 101 and an automatic vent valve 103 in sequence along the fluid conveying direction, and the bow IMDG pump 101 and the automatic vent valve 103 are both located after the connection point between the bow collection tank shore discharge branch pipe 127 and the bow main pipe 122, and before the connection points between the bow tank inlet pipeline 123, the bow discharge pipeline 126, the bow shore discharge pipeline 125, the bow outboard discharge pipeline 124 and the bow main pipe 122. The automatic vent valve 103 can remove the air in the pipeline, reduce the resistance of the system, and enable the bow bilge water to be discharged smoothly. Further, the installation position of the automatic vent valve 103 is about 1m high from the bow IMDG pump 101. Furthermore, a bow test valve 102 and a first bow stop valve 111 are arranged between the bow IMDG pump 101 and the automatic vent valve 103 along the sewage conveying direction. The bow test valve 102 is externally connected to a pressure testing device to monitor the pressure data in the pipeline in real time.

[0048] In the above embodiment, the automatic vent valve 103 includes a valve body 1031, a valve stem 1032, a float 1033 and a valve cap 1034; when gas gathers inside the valve, the liquid level in the valve body 1031 drops, and the float 1033 drops, driving the valve stem 1032 to drop, at which time the exhaust hole of the valve stem 1032 opens, and the gas in the bilge water pipe is discharged from the exhaust hole of the valve stem 1032; when the gas in the bilge water pipe is discharged, the liquid level in the valve body 1031 rises, and the float 1033 rises, driving the valve stem 1032 to become horizontal, and the exhaust hole of the valve stem 1032 is closed.

[0049] Embodiment 2:

[0050] See also Figure 1 to Figure 2 This embodiment also provides a bilge water system, which is arranged at the bottom of the bow cargo hold, the stern cargo hold and the engine room. The bilge water system is provided with a collecting tank for collecting bilge sewage. The bilge water system includes a bow water system and a stern water system, which are used to treat the bilge sewage in the bow cargo hold and the stern cargo hold respectively. The stern water system at the bottom of the stern cargo hold is described in detail below.

[0051] The stern water system includes a stern main pipe 222, the starting end of which is connected to the stern sewage well 219, and the other end is divided into three routes, namely a stern inlet pipe 223, a stern overboard pipe 224 and a stern shore discharge pipe 225; the terminal of the stern inlet pipe 223 is connected to the stern collecting tank 204 for storing stern bilge sewage; the terminal of the stern overboard pipe 224 is connected to the outside of the ship's side for discharging the stern bilge sewage to the navigation sea area; the terminal of the stern shore discharge pipe 225 is connected to the port for discharging the stern bilge sewage to the port sewage receiving equipment. Furthermore, a first stern stop check valve 210 is provided on the stern inlet pipeline 223, which has both the functions of a stop valve and a check valve, and can completely block the flow of sewage in the stern inlet pipeline 223 to prevent backflow. Furthermore, a shore discharge valve is also provided at the terminal of the stern shore discharge pipeline 225, including a stern first shore discharge valve 213 and a stern second shore discharge valve 214, so as to achieve efficient discharge of sewage at the port shore. Furthermore, a stern overboard discharge valve 215 is also provided at the terminal of the stern overboard discharge pipeline 224 to control the flow of sewage discharged overboard.

[0052] In an optional embodiment, the stern bilge water system further includes a stern discharge pipeline 226 and a stern collection tank shore discharge branch pipe 227. The starting end of the stern discharge pipeline 226 is connected to the stern collection tank 204, and the other end is connected to the stern discharge overboard pipeline 224, so as to discharge the bilge sewage in the stern collection tank 204 to the navigation sea area; the starting end of the stern collection tank shore discharge branch pipe 227 is connected to the stern collection tank 204, and the other end is connected to the stern main pipe 222, and is connected to the stern shore discharge pipeline 225 through the stern main pipe 222, so as to discharge the stern bilge sewage to the port sewage receiving equipment. Furthermore, a third stern plate check valve 216 is provided on the pipeline before the stern discharge pipeline 226 and the stern collection tank bank discharge branch pipe 227 branch to prevent sewage from being diverted back to the stern collection tank 204. A second stern stop valve 218 is also provided on the stern discharge pipeline 226. A third stern electric butterfly valve 217 is also provided on the stern collection tank bank discharge branch pipe 227.

[0053] In an optional embodiment, the stern collecting tank 204 has a stern suction port 205 to facilitate the pipeline to smoothly draw water from the collecting tank. The stern bilge water system also includes a plurality of stern suction port branches 221. For the stern of a ship with one cargo hold, there is a bow sewage well 119, and a corresponding bow suction port branch 121 is set. It can be understood that for the stern of a ship with several cargo holds, several sewage wells and suction port branches are set to extract the accumulated sewage in each sewage well respectively. The starting end of each stern suction port branch 221 is connected to several stern sewage wells 219, and the other end is connected to the stern main pipe 222, so as to transport the bilge sewage in several sewage wells to the stern main pipe 222. Furthermore, a first stern plate check valve 206 and a first stern electric butterfly valve 207 are sequentially arranged on each stern suction branch pipe 221 along the fluid conveying direction. When the sewage is normally extracted and conveyed, the first stern plate check valve 206 is opened, and when the sewage flows in the reverse direction, the first stern plate check valve 206 is closed to ensure that the sewage will not flow back to the sewage well after pumping, protect the pipeline system and related equipment from damage by the backflow fluid, and improve the drainage efficiency. The first stern electric butterfly valve 207 can adjust the opening and closing degree of the valve as needed, so as to accurately control the sewage flow of the stern suction branch pipe 221. Furthermore, a second stern plate check valve 208 and a second stern electric butterfly valve 209 are arranged in the front section of the stern main pipe 222 near the stern suction branch pipe 221 to control and accurately adjust the flow of the stern main pipe 222 and the sewage flow direction.

[0054] In an optional embodiment, the stern main pipe 222 is provided with a stern IMDG pump 201, which is located after the connection point between the stern collection tank shore discharge branch pipe 227 and the stern main pipe 222, and before the connection points between the stern tank inlet pipeline 223, the stern discharge pipeline 226, the stern shore discharge pipeline 225, the stern outboard discharge pipeline 224 and the stern main pipe 222. Further, a stern test valve 202 and a first stern stop valve 211 are also provided at the stern IMDG pump 201 along the sewage conveying direction, and the stern test valve 202 is externally connected to a pressure test device to monitor the pressure data in the pipeline in real time.

[0055] In an optional embodiment, the bilge water system also includes a cabin water system, which is arranged between the bow water system and the stern water system to isolate the bow water system and the stern water system, so as to form a bow water system, a cabin water system and a stern water system that are all independently operated. Further, the bow main pipe 122 and the stern main pipe 222 are connected through a cabin main pipe 310, and the cabin main pipe 310 is also connected to a number of sewage wells at the bottom of the cabin to extract and discharge sewage from the bottom of the cabin. A first isolation valve 301 and a first blind flange 302 are arranged at the connection between the cabin main pipe 310 and the bow main pipe 122, and a second isolation valve 303 and a second blind flange 304 are arranged at the connection between the cabin main pipe 310 and the stern main pipe 222 to isolate the bow water system and the stern water system respectively.

[0056] Embodiment three:

[0057] See also Figures 1 to 4 This embodiment provides a bilge water discharge method, using the bilge water system provided in the first embodiment and the second embodiment, the bilge water discharge method includes:

[0058] When the ship sails to the sea area where it cannot discharge into the sea, the bilge sewage is transported to the main pipe, and then transported to the collection tank through the cabin intake pipeline to store the bilge sewage; when the ship sails to the sea area where it can discharge into the sea, the bilge sewage is transported to the main pipe, and then discharged to the navigation sea area through the overboard pipe; when the ship sails to the port, the bilge sewage is transported to the main pipe, and then discharged to the port sewage receiving equipment through the shore discharge pipeline.

[0059] When the ship sails to an area where it can discharge into the sea, the bilge sewage stored in the collecting tank is discharged to the navigation area through the discharge pipe and the overboard pipe; when the ship sails to the port, the bilge sewage stored in the collecting tank is discharged to the port sewage receiving equipment through the collecting tank shore discharge branch pipe and the shore discharge pipeline.

[0060] The bilge water discharge method provided in this embodiment is described in detail below in conjunction with the bow water system and the stern water system.

[0061] In an optional implementation, the suction pipe from the sewage well on the port side of cargo hold 9 to the bow collection tank 104 for dangerous goods is relatively long. Taking this branch pipe as an example, the extraction method of the bilge water pipeline system of the bow cargo hold is described: the bow IMDG pump 101 sucks bilge water from the bow sewage well 119 and flows into the bow main pipe 122 through the bow suction port 105, the first bow plate check valve 106, and the first bow electric butterfly valve 107. At this time, the electric butterfly valves of other branches are all closed. The water enters the inlet of the bow IMDG pump 101 through the second bow plate check valve 108 and the second bow electric butterfly valve 109 on the bow main pipe 122. The outlet of the bow IMDG pump 101 has two destinations after passing through the first bow stop valve 111: in the sea area where discharge is not allowed, it enters the bow collection tank 104 for dangerous goods through the first bow stop check valve 110 and the bow inlet pipeline 123; in the sea area where discharge is allowed, it is discharged to the overboard through the second bow stop check valve 112, the bow overboard pipeline 124, and the bow overboard valve 115. When arriving at the port, the bow IMDG pump 101 sucks the bottom water from the bow collecting tank 104 of dangerous goods through the bow collecting tank suction port 120, the third bow plate check valve 116, and the third bow electric butterfly valve 117 to reach the inlet of the bow IMDG pump 101, and the outlet of the bow IMDG pump 101 is discharged to the shore receiving facilities through the first bow stop valve 111, the second bow stop check valve 112, the bow shore discharge pipeline 125, the first bow shore discharge valve 113 and / or the second bow shore discharge valve 114. In addition, in the sea area where discharge is possible, the bilge water of the bow collecting tank 104 of dangerous goods is discharged overboard through the bow collecting tank suction port 120, the third bow plate check valve 116, the second bow stop valve 118, the bow discharge pipeline 126, the bow overboard discharge pipeline 124 and the bow overboard discharge valve 115.

[0062] Furthermore, since the bow pipeline is long, the outlet pipeline resistance is large, and there is also air accumulation in the pipeline, the capacity of the bow IMDG pump 101 is insufficient to pump the bilge water into the bow collecting tank 104. However, the outlet of the bow IMDG pump 101 is equipped with an automatic air vent valve 103. The accumulated air in the bilge water pipeline will accumulate at the outlet of the bow IMDG pump 101 through the automatic air vent valve 103 at the outlet of the first bow stop valve 111. The buoy in the automatic air vent valve 103 Under the action of the gas, 1033 drives the valve stem 1032 to move downward, and the exhaust hole of the valve stem 1032 opens to discharge the gas out of the pipeline, but the bilge water liquid is still in the pipeline without overflowing; the gas in the pipeline is released, the outlet pipeline resistance is reduced, and the bilge water is finally discharged to the bow collecting tank 104; when there is no gas in the pipeline, the bilge water pipeline liquid pushes the float 1033 to move upward, driving the valve stem 1032 to close the exhaust hole, and the exhaust ends at this time.

[0063] In an optional implementation, taking the branch pipeline from the sewage well on the port side of the cargo hold 10 to the stern collection tank 204 for dangerous goods as an example, the method of extracting the bilge water pipeline system of the stern cargo hold is described: the stern IMDG pump 201 sucks bilge water from the stern sewage well 219, and the stern suction branch pipe 221 composed of the stern suction port 205, the first stern plate check valve 206, and the first stern electric butterfly valve 207 converges to the stern main pipe 222, at which time the electric butterfly valves of other branch pipes are all closed. The water enters the inlet of the stern IMDG pump 201 through the second stern plate check valve 208 and the second stern electric butterfly valve 209 on the stern main pipe 222. The outlet of the stern IMDG pump 201 has two destinations after passing through the first stern stop valve 211: in the sea area where discharge is not allowed, it enters the stern collection tank 204 for dangerous goods through the first stern stop check valve 210 and the stern inlet pipe 223; in the sea area where discharge is allowed, it is discharged to the overboard through the second stern stop check valve 212, the stern overboard pipe 224, and the stern overboard valve 215. When arriving at the port, the stern IMDG pump 201 sucks the bilge water from the stern collecting tank 204 of dangerous goods through the stern collecting tank suction port 220, the third stern plate check valve 216, and the third stern electric butterfly valve 217 to reach the inlet of the stern IMDG pump 201, and the outlet of the stern IMDG pump 201 is discharged to the shore receiving facilities through the first stern stop valve 211, the second stern stop check valve 212, the stern shore discharge pipeline 225, the stern first shore discharge valve 213 and / or the stern second shore discharge valve 214. In addition, in the sea area where discharge is possible, the bilge water of the stern collecting tank 204 of dangerous goods is discharged overboard through the stern collecting tank suction port 220, the third stern plate check valve 216, the second stern stop valve 218, the stern discharge pipeline 226, the stern overboard discharge pipeline 224 and the stern overboard discharge valve 215.

[0064] Embodiment 4:

[0065] The present embodiment provides a ship, which may be, for example, a dual-fuel ship, comprising an engine room and a bow cargo hold and a stern cargo hold located at both ends of the engine room, wherein the bow cargo hold and / or the stern cargo hold comprises a plurality of cargo holds, and the height difference between the sewage well of at least one cargo hold and the height of the IMDG pump is greater than 30 meters, and the bottom of the cargo hold is provided with a bilge water system as provided in Embodiment 1 and Embodiment 2.

[0066] In summary, the bilge water system, bilge water discharge method and ship provided by the present application solve many safety problems encountered in the existing bilge sewage discharge process, ensuring the smooth operation of the bilge water system and the safe navigation of the ship. Therefore, the present application effectively overcomes various shortcomings in the existing technology and has a high industrial utilization value.

[0067] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A bilge water system, arranged at the bottom of the bow cargo hold, the stern cargo hold and the engine room, characterized in that: The bilge water system is provided with a collecting tank for collecting bilge sewage, and further comprises: The main pipe has one end connected to the sewage well and the other end divided into three routes, namely, an inlet pipeline, an overboard pipeline and a shore pipeline; the terminal of the inlet pipeline is connected to the collecting tank to store bilge sewage; the terminal of the overboard pipeline is connected to the outside of the ship's side to discharge the bilge sewage to the navigation sea area; the terminal of the shore pipeline is connected to the port to discharge the bilge sewage to the port sewage receiving equipment.

2. The bilge water system according to claim 1, characterized in that: Also includes: a discharge pipeline, one end of which is connected to the collecting tank and the other end of which is connected to the overboard discharge pipeline, for discharging the bilge sewage in the collecting tank to the navigation sea area; The collecting tank shore discharge branch pipe has one end connected to the collecting tank and the other end connected to the main pipe, and is connected to the shore discharge pipeline through the main pipe, so as to discharge the bilge sewage to the port sewage receiving equipment.

3. The bilge water system according to claim 1, characterized in that: Also includes: A plurality of suction branch pipes have one end connected to a plurality of sewage wells respectively and the other end connected to the main pipe for conveying bilge sewage in the plurality of sewage wells to the main pipe; a first plate check valve and a first electric butterfly valve are sequentially arranged on the suction branch pipe along the fluid conveying direction.

4. The bilge water system according to claim 2, characterized in that: The main pipe is provided with an IMDG pump and an automatic vent valve in sequence along the fluid conveying direction, and the IMDG pump and the automatic vent valve are both located after the connection point between the collection tank shore discharge branch pipe and the main pipe, and before the connection points between the tank inlet pipeline, the discharge pipeline, the shore discharge pipeline, the outboard discharge pipeline and the main pipe respectively.

5. The bilge water system according to claim 4, characterized in that The automatic vent valve comprises a valve body, a valve stem, a float and a valve cap; When gas accumulates in the automatic vent valve, the liquid level in the automatic vent valve drops, and the buoy drops, driving the valve stem to drop. At this time, the exhaust hole of the valve stem opens, and the gas in the bilge water pipe is discharged from the exhaust hole of the valve stem; When the gas in the bilge water pipe is discharged, the liquid level of the automatic vent valve rises, the rise of the float drives the valve stem to become horizontal, and the exhaust hole of the valve stem is closed.

6. The bilge water system according to claim 1, characterized in that It includes a bow water system and a stern water system, which are used to treat bilge sewage in the bow cargo hold and the stern cargo hold respectively.

7. The bilge water system according to claim 6, characterized in that It also includes a cabin water system, which is arranged between the bow water system and the stern water system to isolate the bow water system and the stern water system to form the bow water system and the stern water system which both operate independently.

8. A method for discharging bilge water, characterized in that: Using the bilge water system as claimed in any one of claims 1 to 9, the bilge water discharge method comprises: When the ship sails to sea areas where it cannot discharge into the sea, the bilge sewage is transported to the main pipe and then transported to the collection tank through the cabin inlet pipeline to store the bilge sewage; When the ship sails to the sea where it can be discharged, the bilge sewage is transported to the main pipe and discharged to the navigation sea through the overboard pipe; When the ship sails to the port, the bilge sewage is transported to the main pipe and discharged to the port sewage receiving equipment through the shore discharge pipeline.

9. The bilge water discharge method according to claim 8, characterized in that: Bilge water removal methods also include: When the ship sails to the sea where it can be discharged, the bilge sewage stored in the collection tank is discharged to the navigation sea through the discharge pipe and the overboard pipe; When the ship sails to the port, the bilge sewage stored in the collection tank is discharged to the port sewage receiving equipment through the collection tank shore discharge branch pipe and the shore discharge pipeline.

10. A ship, characterized in that: It includes an engine room and a bow cargo hold and a stern cargo hold located at both ends of the engine room, the bow cargo hold and / or the stern cargo hold include several cargo holds, and the height difference between the sewage well of at least one of the cargo holds and the height of the IMDG pump is greater than 30 meters, and the bilge water system as described in any one of claims 1 to 7 is arranged at the bottom of the cargo hold.

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