Efficient sewage discharge system for ship goods easy to liquefy

Abstract

The invention discloses an efficient sewage discharge system for ship goods easy to liquefy, and relates to the technical field of ship transportation, the efficient sewage discharge system is mounted in a cargo hold, and a first sewage collection place and a second sewage collection place which are oppositely arranged are arranged in the cargo hold; a first filter plate and a second filter plate are respectively arranged on the outer sides of the first sewage collection place and the second sewage collection place, a pipe tunnel is arranged below the cargo hold, and a first sewage well and a second sewage well are arranged in the pipe tunnel and are respectively communicated with the first sewage collection place and the second sewage collection place; the first sewage well and the second sewage well are respectively communicated with a first sewage main pipe and a second sewage main pipe which are positioned in the pipe tunnel and are used for respectively discharging sewage. Through the structural design of a sewage collection place and the layout of double rows of filter screens, the contact area of a cargo drainage structure is obviously increased on the premise of not reducing the capacity of a cargo hold; and meanwhile, a front and back partitioned pipeline system is adopted, and the multi-path drainage guarantee effect is achieved through valve linkage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship transportation, in particular to a high-efficiency sewage discharge system for liquefiable cargo of a ship. BACKGROUND

[0002] With the continuous upgrading of global shipping industry's requirements for safe transportation of high-risk cargoes, the International Maritime Solid Bulk Cargo Code (IMSBC Code) has become increasingly stringent in regulating the transportation of liquefiable cargoes (such as iron ore concentrate and high-water-content metal ore, etc.). Due to the high water content and complex rheological properties of liquefiable cargoes, if the water is not discharged in time during the ship voyage, the cargo may be liquefied, resulting in loss of ship stability and even capsizing accidents. The traditional drainage system mostly adopts a design of a bottom flat filter screen combined with a centralized drainage pipeline, but has problems such as small contact area between the cargo and the drainage structure, single drainage path, etc., and is difficult to meet the dual requirements of drainage efficiency and safety for large bulk carriers.

[0003] In the prior art, the optimization research on the drainage system for liquefiable cargoes mostly focuses on the improvement of filter screen materials or local structure adjustment. For example, some schemes increase the filter screen aperture to improve the drainage speed, but this may easily cause fine particle blockage; some other schemes use a bottom slope design to accelerate water flow collection, but at the expense of effective cargo hold volume; in addition, the current drainage system generally lacks redundancy design, and once the main drainage pipeline is blocked or fails, it will directly threaten the safety of the ship. At present, there is still no overall solution for efficient and safe drainage of liquefiable cargoes in the industry, especially in terms of taking into account the cargo hold utilization rate and the redundancy drainage capacity, there is a significant technical gap. SUMMARY

[0004] The purpose of the present application is to provide a high-efficiency sewage discharge system for liquefiable cargo of a ship, which significantly increases the contact area between the cargo and the drainage structure without reducing the cargo hold volume through the structure design of the sewage collection place and the layout of the double drainage filter screens; at the same time, a front and rear partition pipeline system is adopted to realize multi-path drainage protection through valve linkage; this design fills the gap in the prior art in terms of drainage efficiency and system safety, and provides reliable technical support for the safe transportation of liquefiable cargo of a ship.

[0005] The above technical purpose of the present application is achieved by the following technical scheme: A high-efficiency sewage discharge system for liquefiable cargo of a ship is installed in a cargo hold, and a first sewage collection place and a second sewage collection place are oppositely arranged in the cargo hold; a first filter plate and a second filter plate are respectively arranged outside the first sewage collection place and the second sewage collection place; a pipe tunnel is arranged below the cargo hold, and a first sewage well and a second sewage well are arranged in the pipe tunnel and are respectively communicated with the first sewage collection place and the second sewage collection place; the first sewage well and the second sewage well are respectively communicated with a first sewage main pipe and a second sewage main pipe located in the pipe tunnel, and sewage is discharged therefrom.

[0006] Further, the cargo hold comprises a bottom pier separating two adjacent cargo holds, and the bottom pier comprises a first sewage collection site and a second sewage collection site respectively arranged in the two adjacent cargo holds.

[0007] Further, the first filter plate and the second filter plate are perpendicular to the bottom of the cargo hold.

[0008] Further, the first sewage collection site and the second sewage collection site are provided with an extension steel plate extending outward to the outside of the corresponding first filter plate or second filter plate.

[0009] Further, the first sewage well and the second sewage well are provided with a sewage pump, the first sewage collection site and the second sewage collection site are respectively provided with a first sewage branch pipe and a second sewage branch pipe, the output end of the sewage pump is connected to the first sewage branch pipe or the second sewage branch pipe, and the other end of the first sewage branch pipe or the second sewage branch pipe is communicated with the corresponding first sewage main pipe and second sewage main pipe.

[0010] Further, the first sewage branch pipe is provided with a first one-way valve and a second remote control butterfly valve, and the second sewage branch pipe is provided with a second one-way valve and a third remote control butterfly valve.

[0011] Further, the first sewage main pipe and the second sewage main pipe are connected through a pipeline, and a first remote control butterfly valve is arranged on the pipeline.

[0012] Further, the second sewage branch pipe in the same cargo hold is located in front of the first sewage branch pipe, and the caliber of the second sewage branch pipe is 0.7 times the caliber of the first sewage branch pipe.

[0013] Further, the first filter plate comprises a filter plate piece and a filter screen inside the filter plate piece.

[0014] Further, the first filter plate and / or the second filter plate are provided with a plurality of up-and-down distributed.

[0015] In summary, the present application has the following beneficial effects: Through the sewage collection site structure design and the double-row filter screen layout, the contact area of the cargo drainage structure is significantly increased without reducing the cargo hold capacity, and the sewage drainage efficiency is improved; compared with only providing a sewage discharge pipeline at the tail, the present application sets sewage collection sites and sewage discharge related pipelines at the front and rear of the cargo hold, so that the cargo hold sewage discharge is more efficient and safe; the innovative pipeline system is adopted in the front and rear partition, and a calculation method of the sewage branch pipe caliber is provided, and multiple path drainage is realized through valve linkage. The design fills the gap in the drainage efficiency and system safety of the prior art, and provides reliable technical support for the safe transportation of liquefiable cargo of the ship.

[0016] The cargo hold sewage collection area is designed to utilize the cargo hold floor pier, with two rows of filter plates installed for collecting cargo hold sewage. The installation of filter screens is optional depending on the size of the cargo. Each sewage collection area is equipped with a sewage well. All cargo holds share a set of sewage pipelines at the front sewage wells and another set of sewage pipelines at the rear sewage wells. The two sets of sewage pipelines are connected by valves and serve as backups for each other. This invention increases the contact area between the cargo and the sewage collection area through the structural design of the cargo hold sewage collection area and the design of the filter plate components, thereby improving the efficiency of sewage collection and discharge. The two sets of sewage discharge pipelines at the front and rear of the cargo hold enhance the reliability of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency wastewater discharge system for easily liquefied cargo on ships according to the present invention; Figure 2 This is a schematic diagram of the structure of the first filter plate in a high-efficiency wastewater discharge system for easily liquefied cargoes on ships according to the present invention.

[0018] In the diagram, 1. Cargo hold; 2. First sewage collection point; 3. First filter plate; 31. Base; 32. Filter screen; 33. Filter plate component; 4. Second sewage collection point; 5. Second filter plate; 6. Pipe tunnel; 7. First remote-controlled butterfly valve; 8. First check valve; 9. Second remote-controlled butterfly valve; 10. First sewage branch pipe; 11. First sewage well; 12. First sewage main pipe; 13. Second sewage main pipe; 14. Second sewage well; 15. Second sewage branch pipe; 16. Third remote-controlled butterfly valve; 17. Second check valve. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0020] An efficient wastewater discharge system for easily liquefied cargoes on ships, such as Figure 1 As shown, a first sewage collection point 2 and a second sewage collection point 4 are installed in the cargo hold 1, which are arranged opposite to each other (the second sewage collection point 4 in the same cargo hold 1 is located in front of the first sewage collection point 2). In this embodiment, the cargo hold 1 includes a bottom block, which is separated between two adjacent cargo holds 1. The bottom block includes a first sewage collection point 2 and a second sewage collection point 4 fixed to its bottom, arranged opposite to each other, and located in the two adjacent cargo holds 1 respectively. The first sewage collection point 2 and the second sewage collection point 4 are innovative designs of the ship's bottom block, which are two structures at the front and rear of the bottom block, thus improving the sewage collection capacity.

[0021] like Figure 1As shown in the drawings, the first sewage collection place 2 and the second sewage collection place 4 are respectively provided with a first filter plate 3 and a second filter plate 5 outside, wherein the first filter plate 3 and the second filter plate 5 are perpendicular to the bottom of the cargo hold 1, the first filter plate 3 and the second filter plate 5 are both provided with a plurality of (two in this embodiment) upper and lower distributed edges, and the distance between the upper and lower distributed edges is not less than 100mm, so as to meet the convenience of arrangement, welding and maintenance, and increase the contact area of the cargo and the first sewage collection place 2 and the second sewage collection place 4; As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the first sewage collection place 2 and the second sewage collection place 4 are respectively provided with a first filter plate 3 and a second filter plate 5 outside, wherein the first filter plate 3 and the second filter plate 5 are perpendicular to the bottom of the cargo hold 1, the first filter plate 3 and the second filter plate 5 are both provided with a plurality of (two in this embodiment) upper and lower distributed edges, and the distance between the upper and lower distributed edges is not less than 100mm, so as to meet the convenience of arrangement, welding and maintenance, and increase the contact area of the cargo and the first sewage collection place 2 and the second sewage collection place 4;

[0022] As shown in the drawings, Figure 1 As shown in the drawings, the first sewage collection place 2 and the second sewage collection place 4 are respectively provided with a first filter plate 3 and a second filter plate 5 outside, wherein the first filter plate 3 and the second filter plate 5 are perpendicular to the bottom of the cargo hold 1, the first filter plate 3 and the second filter plate 5 are both provided with a plurality of (two in this embodiment) upper and lower distributed edges, and the distance between the upper and lower distributed edges is not less than 100mm, so as to meet the convenience of arrangement, welding and maintenance, and increase the contact area of the cargo and the first sewage collection place 2 and the second sewage collection place 4; Specifically, the first sewage well 11 and the second sewage well 14 are both fixed with a sewage pump, the first sewage collection place 2 and the second sewage collection place 4 are respectively provided with a first sewage branch pipe 10 and a second sewage branch pipe 15 (the diameter of the second sewage branch pipe 15 is 0.7 times the diameter of the first sewage branch pipe 10, which refers to the requirement of the classification society on the diameter of the sewage pipeline of the long cargo hold 1), the output end of the sewage pump is connected to the corresponding first sewage branch pipe 10 or second sewage branch pipe 15, and the other end of the first sewage branch pipe 10 or second sewage branch pipe 15 is communicated with the corresponding first sewage main pipe 12 and second sewage main pipe 13, so that the sewage in the sewage well is connected to the sewage main pipe through the sewage branch pipe according to the specification requirement, and the sewage in the front and rear sewage wells is discharged through different pipelines.

[0023] As shown in the drawings, Figure 1As shown, the first sewage branch pipe 10 is connected with the first one-way valve 8 and the second remote control butterfly valve 9 (in the first sewage collecting place 2), the second sewage branch pipe 15 is connected with the second one-way valve 17 and the third remote control butterfly valve 16 (in the second sewage collecting place 4), realizing one-way flow and opening and closing control of sewage to the corresponding sewage main pipe direction; The first sewage main pipe 12 and the second sewage main pipe 13 are connected through a pipeline, and the first remote control butterfly valve 7 is arranged on the pipeline, so that when a sewage main pipe is damaged, the sewage can still be normally discharged through the other sewage main pipe.

[0024] The above is only the preferred embodiment of the present application, and is not used to limit the present application. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and the modification or equivalent replacement should also be considered to fall within the protection scope of the technical scheme of the present application.

Claims

1. A high efficiency sewage discharge system for a ship carrying liquefiable cargo, characterised in that: The first and second sewage collecting spaces are oppositely arranged in the cargo hold, and the first and second filter plates are respectively arranged outside the first and second sewage collecting spaces.

2. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1, characterised in that: The cargo hold comprises a bottom pier which is arranged between two adjacent cargo holds and comprises the first and second sewage collecting spaces arranged oppositely and respectively located in the two adjacent cargo holds.

3. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1, characterized in that: The first and second filter plates are perpendicular to the bottom of the cargo hold.

4. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 3 wherein: The first and second sewage collecting spaces are provided with an extension steel plate extending outwardly to the outside of the corresponding first or second filter plate.

5. A high efficiency sewage discharge system for a ship carrying liquefiable cargo as claimed in claim 1 wherein: The first and second sewage pumps are arranged in the first and second sewage wells, and the first and second sewage branch pipes are respectively arranged in the first and second sewage collecting spaces.

6. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 5 wherein: The first and second sewage branch pipes are respectively provided with a first one-way valve and a second remote control butterfly valve, and the second sewage branch pipe is provided with a second one-way valve and a third remote control butterfly valve.

7. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1 or 5, characterized in that: The first and second sewage branch pipes are connected by a pipeline, and the pipeline is provided with a first remote control butterfly valve.

8. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1 wherein: The second sewage branch pipe is located in front of the first sewage branch pipe in the same cargo hold, and the caliber of the second sewage branch pipe is 0.7 times the caliber of the first sewage branch pipe.

9. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1 or 8, characterised in that: The first filter plate comprises a filter plate member and a filter screen arranged inside the filter plate member.

10. A high efficiency sewage discharge system for a ship carrying liquefiable cargo according to claim 1 or 8, characterised in that: The first and / or second filter plate is provided with a plurality of upper and lower distribution filter plates.

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