Closed fresh water ballast water system

Abstract

The utility model discloses a closed fresh water ballast water system which comprises a central ballast water tank group, a left ballast water tank group and a right ballast water tank group which are connected through circulating pipelines, a stop valve group, a first ballast pump and a second ballast pump are arranged on the circulating pipeline, a water injection port and a water drainage port are formed in the circulating pipeline, a water injection valve V1 is arranged on the water injection port, and a water drainage valve V13 is arranged on the water drainage port; the center water ballast space set is arranged in the middle of the ship body, the left water ballast space set is arranged on the left portion of the ship body, and the right water ballast space set is arranged on the right portion of the ship body. According to the utility model, the closed ballast tank groups are connected through the circulating pipeline and are matched with each other, so that ballast water can be pumped and drained into the central ballast water tank group to be efficiently and quickly adjusted when the gravity center of the ship is adjusted; and fresh water is used as ballast water, so that cross-sea-area propagation of harmful organisms, fungi and pathogens in a new sea area during drainage can be effectively prevented.

Description

A closed freshwater ballast water system Technical Field

[0001] This utility model belongs to the field of ship ballast water technology, specifically a closed freshwater ballast water system. Background Technology

[0002] Ballast water tanks are compartments used by ships to adjust the ship's center of gravity, buoyancy, and stability during navigation and cargo loading / unloading. After ballast water is injected into the ballast water tanks, ballast water is drawn in or discharged from the tanks by ballast pumps to adjust the changes in the ship's draft caused by navigation or cargo loading / unloading in a timely manner, so as to avoid problems that may affect the ship's stability during navigation and cargo loading / unloading.

[0003] Currently, conventional ballast tanks are generally located on both sides of the ship's hull. Ballast water is injected into the corresponding tanks as needed using ballast pumps to adjust the ship's stability. However, when adjusting the ship's center of gravity is required, the distribution of cargo must be changed, for example, by swapping the volumes of light and heavy cargo vertically. But this method requires a lot of manpower and resources, is cumbersome and time-consuming, and has low adjustment efficiency. Moreover, the ship's original ballast water is basically seawater from the origin, which carries various biological and fungal substances. If the ship's fuel load and domestic water consumption change during the voyage, or if cargo is loaded or unloaded at the destination, these substances can cause problems. When the draft difference between the port and starboard sides of a ship changes, ballast water needs to be pumped out or injected to adjust the ship's center of gravity. This causes biological and fungal substances in the seawater at the point of origin to be discharged with the ballast water, leading to the cross-oceanic spread of harmful organisms, fungi, and pathogens, resulting in cross-polluting of the marine environment. The invasion of these alien species will harm the local marine ecosystem and has been listed by the International Environment Facility (CEF) as one of the four major marine hazards. Furthermore, using seawater as ballast water will also accelerate the corrosion of the ballast tank system due to its high conductivity and sulfate content, reducing its service life and increasing maintenance costs. Summary of the Invention

[0004] This invention employs a closed ballast tank assembly connected by a circulation pipeline. The central ballast water tank assembly works in conjunction with the left and right ballast water tank assemblies. When the ship needs to adjust its center of gravity, the ballast water from the left and right ballast water tank assemblies can be pumped into the central ballast water tank assembly, enabling efficient and rapid adjustment of the ship's center of gravity. This method is convenient, time-saving, and labor-saving, greatly improving adjustment efficiency. Furthermore, by using fresh water as ballast water, it effectively prevents the cross-oceanic spread of harmful organisms, bacteria, and pathogens to new sea areas when using seawater as ballast water, avoiding the problem of invasive species harming the local marine ecosystem in the transit or target port areas.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A closed-loop freshwater ballast system includes a central ballast water tank group, a left ballast water tank group, and a right ballast water tank group, which are connected to the right ballast water tank group via a circulation pipeline. A shut-off valve group, a first ballast pump, and a second ballast pump are installed on the circulation pipeline. The circulation pipeline also has an inlet and an outlet, with an inlet valve installed at the inlet. V1 A drain valve is installed on the drain outlet. V13 The central ballast water tank assembly is located in the middle of the hull, the left ballast water tank assembly is located on the left side of the hull, and the right ballast water tank assembly is located on the right side of the hull.

[0007] Furthermore, a seawater main pipe is provided on the circulation pipeline, and a shut-off valve is installed on the seawater main pipe. V15 , gate valve V16 And blind plates.

[0008] Furthermore, the central ballast water tank group consists of several ballast water tanks located at the bow, midships, and stern of the ship's center.

[0009] Furthermore, the left ballast water tank group consists of several ballast water tanks located on the left side of the ship's mid-section, at the bow, midships, and stern.

[0010] Furthermore, the right ballast water tank group consists of several ballast water tanks located on the right side of the ship's mid-section, at the bow, midships, and stern.

[0011] Furthermore, the gate valve assembly consists of a gate valve. V2 , gate valve V3 , gate valve V4 , gate valve V5 , gate valve V6 , gate valve V7 , gate valve V8 , gate valve V10 , gate valve V11 , gate valve V12 , gate valve V14 composition.

[0012] Furthermore, the circulation pipeline is connected to a water supply valve. V17 Connect to the domestic water supply system.

[0013] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0014] This invention employs a closed-loop ballast water system. Based on the ship's adjustment needs, a first ballast pump adds and pumps ballast water between the central ballast water tank group and the port and starboard ballast water tank groups. This allows for easy and convenient adjustment of the ship's center of gravity and stability. Furthermore, the use of fresh water as ballast water avoids the direct exchange with external seawater that could lead to biological invasion, thus effectively constructing a dual biosafety barrier and achieving zero risk of biological invasion and zero pollution discharge. It also significantly reduces the corrosion rate of the ballast tanks, effectively extending their service life and reducing maintenance costs. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the process of this utility model.

[0016] In the diagram: 1. Water injection valve V1 2. Central ballast water tank assembly; 3. Drain valve V13 4. Left ballast water tank assembly; 5. Water supply valve V17 6. Shut-off valve V11 7. Right ballast water tank assembly; 8. Shut-off valve V12 9. Gate valve V10 10. Gate valve V14 11. Gate valve V3 12. Gate valve V4 13. Gate valve V5 14. Gate valve V6 15. Gate valve V8 16. Gate valve V2 17. First ballast pump; 18. Shut-off valve V16 19. Second ballast pump; 20. Shut-off valve V7 21. Blind flange; 22. Gate valve V15。 Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] In the structure shown in Figure 1, the closed-loop freshwater ballast system provided by this invention includes a central ballast water tank group 2, a left ballast water tank group 4, and a right ballast water tank group 7. The central ballast water tank group 2, the left ballast water tank group 4, and the right ballast water tank group 7 are connected by a circulation pipeline. A shut-off valve group, a first ballast pump 17, and a second ballast pump 19 are installed on the circulation pipeline. A water inlet and a water outlet are provided on the circulation pipeline, and a water inlet valve is provided on the water inlet. V1 1. A drain valve is installed on the drain outlet. V13 3. Fresh water is injected into each ballast tank group through the water inlet by the first ballast pump 17. Ballast water can then be added or pumped between the ballast tank groups through the shut-off valve group and the circulation pipeline. The second ballast pump 19 serves as a standby pump. The central ballast water tank group 2 is located in the middle of the hull, the left ballast water tank group 4 is located on the left side of the hull, and the right ballast water tank group 7 is located on the right side of the hull. According to the need to adjust the ship's draft difference, the ship's center of gravity can be adjusted by injecting ballast water into the central ballast water tank group 2, and the ship's stability can be maintained by injecting ballast water into the left ballast water tank group 4 or the right ballast water tank group 7.

[0019] The circulation pipeline is equipped with a main seawater pipe, and a shut-off valve is installed on the main seawater pipe. V15 22. Gate valve V16 18 and blind flange 21: Under normal circumstances, the seawater main is sealed through blind flange 21. In an emergency, seawater can be injected into the corresponding ballast tank group by opening blind flange 21 to ensure the stability of the ship in an emergency.

[0020] The central ballast water tank group 2 consists of several ballast water tanks located at the bow, midship, and stern of the ship, so that the ballast water tanks of the central ballast water tank group 2 are evenly distributed in the middle of the ship.

[0021] The left ballast water tank group 4 consists of several ballast water tanks located on the left side of the ship's longitudinal section, at the bow, midships, and stern, so that the ballast water tanks of the left ballast water tank group 4 are evenly distributed in the middle of the ship.

[0022] The right ballast water tank group 7 consists of several ballast water tanks located on the right side of the ship's mid-section, at the bow, midships, and stern, so that the ballast water tanks of the right ballast water tank group 7 are evenly distributed in the middle of the ship.

[0023] The gate valve assembly consists of a gate valve V2 16. Gate valve V3 11. Gate valve V4 12. Gate valve V5 13. Gate valve V6 14. Gate valve V7 20. Gate valve V8 15. Gate valve V10 9. Shut-off valveV11 6. Shut-off valve V12 8. Gate valve V14 It consists of 10 components; the first ballast pump 17 can pump or inject ballast water into the corresponding ballast tank group through the corresponding shut-off valve according to the adjustment needs of the ship, thereby achieving the purpose of maintaining the stability of the ship and adjusting the center of gravity of the ship.

[0024] The circulation pipeline is connected to a water supply valve. V17 5. Connect to the domestic water system. When domestic water is needed, it can be supplied through the circulation pipeline and the shut-off valve. V17 5. Domestic water injection device.

[0025] The working principle of this utility model:

[0026] In the initial state, fresh water is pumped as ballast water through the first ballast pump and then through the shut-off valve. V1 1. Gate valve V2 16. Gate valve V14 10. Inject into left ballast water tank group 4; via shut-off valve V1 1. Gate valve V7 20. Gate valve V8 15. Inject into right ballast water tank group 7; via shut-off valve V1 1. Gate valve V7 20. Gate valve V11 6. Inject the central ballast water tank group 2, and keep some compartments of the left ballast water tank group 4, right ballast water tank group 7, and central ballast water tank group 2 empty and some compartments full.

[0027] When a ship has a difference in draft between its port and starboard sides, some ballast water needs to be pumped from the port ballast water tank group 4 and injected into the starboard ballast water tank group 7, or vice versa, as follows:

[0028] When the ship's port draft is greater than its starboard draft, the first ballast pump 17 starts working, pumping part of the ballast water in the port ballast tank 4 through the shut-off valve. V14 10. Gate valve V3 11. Gate valve V4 12. Gate valve V10 9. Shut-off valve V8 15. Pump out and inject water into the right ballast water tank assembly;

[0029] When the ship's draft on the starboard side is greater than that on the port side, the first ballast pump starts working, pumping a portion of the ballast water from the starboard ballast tank group through the shut-off valve. V8 15. Gate valve V6 14. Gate valve V5 13. Gate valve V12 8. Gate valve V14 10 pumps were injected into the left ballast water tank assembly.

[0030] When it is necessary to adjust the ship's ballast water center of gravity, the first ballast pump starts working, pumping a portion of the ballast water from the port ballast water tank through the shut-off valve. V14 10. Gate valve V3 11. Gate valve V4 12. Gate valve V10 9. Shut-off valve V11 6. Pump water into the central ballast water tank assembly, and pump a portion of the ballast water from the right ballast water tank assembly through the shut-off valve. V8 15. Gate valve V6 14. Gate valve V5 13. Gate valve V10 9. Shut-off valve V11 6. The water is pumped out and injected into the central ballast tank assembly to adjust the ship's center of gravity.

[0031] When domestic water is needed, the first ballast pump operates, pumping ballast water from each ballast tank group through the water supply valve. V17 5. Inject domestic water into the system to provide domestic water for the ship.

[0032] In emergency situations where the ship has poor stability and lacks loading water, the blind flange can be opened, and seawater can be pumped into each ballast tank group through the seawater main pipe via the first ballast pump to deal with the emergency.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that various modifications and refinements can be made without departing from the spirit or essential characteristics of the invention, and these modifications and refinements should also be considered within the scope of protection of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description; thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A closed-loop freshwater ballast water system, characterized in that: It includes a central ballast water tank group (2), a left ballast water tank group (4), and a right ballast water tank group (7). The central ballast water tank group (2), the left ballast water tank group (4), and the right ballast water tank group (7) are connected by a circulation pipeline. A stop valve group, a first ballast pump (17), and a second ballast pump (19) are installed on the circulation pipeline. A water inlet and a water outlet are provided on the circulation pipeline, and a water inlet valve is provided on the water inlet. V1 (1) A drain valve is installed on the drain outlet. V13 (3); The central ballast water tank group 2 is located in the middle of the hull, the left ballast water tank group (4) is located in the left part of the hull, and the right ballast water tank group 7 is located in the right part of the hull.

2. The closed-loop freshwater ballast water system according to claim 1, characterized in that: The circulation pipeline is equipped with a main seawater pipe, and a shut-off valve is installed on the main seawater pipe. V15 (21) Gate valve V16 (18) and blind plate.

3. The closed-loop freshwater ballast water system according to claim 1, characterized in that: The central ballast water tank group (2) consists of several ballast water tanks located at the bow, midship, and stern of the ship's center.

4. The closed-loop freshwater ballast water system according to claim 1, characterized in that: The left ballast water tank group (4) consists of several ballast water tanks located on the left side of the ship's mid-section, at the bow, midships, and stern.

5. The closed fresh water ballast water system of claim 1, wherein: The right ballast water tank group (7) consists of several ballast water tanks located on the right side of the ship's mid-longitudinal section, at the bow, midships, and stern.

6. The closed-loop freshwater ballast water system according to claim 1, characterized in that: The gate valve assembly consists of a gate valve V2 (16) Gate valve V3 (11) Gate valve V4 (12) Gate valve V5 (13) Gate valve V6 (14) Gate valve V7 (20) Gate valve V8 (15) Gate valve V10 (9) Gate valve V11 (6) Gate valve V12 (8) Composition.

7. The closed-loop freshwater ballast water system according to claim 1, characterized in that: The circulation pipeline is connected to a water supply valve. V17 (5) Connect to the domestic water supply system.

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