A method for filling, distributing and cleaning a double-ended passenger ship fresh water system and double-ended passenger ship fresh water tanks

Abstract

The application provides a double-head passenger ship fresh water system and a method for filling, allocating and cleaning a double-head passenger ship fresh water tank. In the system, two filling stations of the first bow and the second bow are connected with four independent fresh water tanks by pipelines. When the first bow of the double-head passenger ship is berthed, three fresh water tanks need to be filled with fresh water, and the other fresh water tank needs to be cleaned. First, the four fresh water tanks are filled with water at the same time, one fresh water tank is filled with medicine at the same time, the corresponding filling pipeline is cleaned, and the fresh water tank is cleaned. After cleaning, the drainage pipeline of the cleaned fresh water tank is opened, and the fresh water pump is started to drain the sea. It can be seen that while one fresh water tank is cleaned, the other three fresh water tanks can be continuously filled with fresh water, and the filling of fresh water and the cleaning of the fresh water tank are simultaneously realized. After the filling of fresh water and the cleaning of the fresh water tank are completed, the fresh water pump can be started immediately to drain the water, which greatly improves the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ship fresh water system, and particularly relates to a double-head passenger ship fresh water system and a method for filling, allocating and cleaning a double-head passenger ship fresh water tank. BACKGROUND

[0002] At present, basically only single work such as filling or allocating of the fresh water tank of the ship is carried out, and there is no design for simultaneously carrying out filling, allocating and cleaning and sea discharge of the fresh water tank arranged in front and back. The conventional filling or cleaning or allocating of the fresh water tank of the passenger ship cannot meet the rapid filling while not hindering the cleaning and allocating of the fresh water tank.

[0003] Therefore, the current system design makes the time of the ship docking at the shore long, and affects the cycle of the ship operation. SUMMARY

[0004] The purpose of the present application is to provide a double-head passenger ship fresh water system and a method for filling, allocating and cleaning a double-head passenger ship fresh water tank, which can simultaneously carry out the work such as filling, allocating, cleaning and sea discharge of the fresh water tank of the ship.

[0005] The first aspect of the present application provides a double-head passenger ship fresh water system, comprising a first bow and a second bow located at two ends of a ship body, and characterized in that:

[0006] The first bow comprises a first fresh water tank, a second fresh water tank, a first filling station and a first fresh water delivery pump;

[0007] The water outlet end of the first filling station is connected with a first total filling pipeline; the water inlet of the first fresh water tank is connected with a first filling pipeline, the water inlet of the second fresh water tank is connected with a second filling pipeline, and the first filling pipeline and the second filling pipeline are both connected on the first total filling pipeline;

[0008] The water discharge outlet of the first fresh water tank is connected with a first water discharge pipeline, the water discharge outlet of the second fresh water tank is connected with a second water discharge pipeline, and the first water discharge pipeline and the second water discharge pipeline are both connected on a first total water discharge pipeline, a first stop valve is arranged on the first total water discharge pipeline, and the water inlet end and the water outlet end of the first fresh water delivery pump are both connected on the first total water discharge pipeline and on the front and back sides of the first stop valve;

[0009] The second bow comprises a third fresh water tank, a fourth fresh water tank, a second filling station and a second fresh water delivery pump;

[0010] The water outlet end of the second filling station is connected with a second total filling pipeline; the water inlet of the third fresh water tank is connected with a third filling pipeline, the water inlet of the fourth fresh water tank is connected with a fourth filling pipeline, and the third filling pipeline and the fourth filling pipeline are both connected on the second total filling pipeline;

[0011] The third water tank is connected with a third drainage pipeline, the fourth water tank is connected with a fourth drainage pipeline, the third drainage pipeline and the fourth drainage pipeline are connected with the second total drainage pipeline, the second total drainage pipeline is provided with a second stop valve, the water inlet end and the water outlet end of the second water delivery pump are connected with the second total drainage pipeline and are located on the front and back sides of the second stop valve; the first total filling pipeline is communicated with the second total filling pipeline;

[0012] The first water tank, the second water tank, the third water tank and the fourth water tank are connected with the dosing equipment.

[0013] Optionally, the ends of the first total drainage pipeline and the second total drainage pipeline are connected and communicated with each other;

[0014] The end of the first total filling pipeline is connected with the first total drainage pipeline and is connected with the output side of the first water delivery pump;

[0015] The end of the second total filling pipeline is connected with the second total drainage pipeline and is connected with the output side of the second water delivery pump.

[0016] Optionally, the ends of the first total filling pipeline and the second total filling pipeline are provided with electric butterfly valves.

[0017] Optionally, the water inlet side of the first water delivery pump is provided with a third stop valve, and the water outlet side of the first water delivery pump is provided with a first stop check valve;

[0018] The water inlet side of the second water delivery pump is provided with a fourth stop valve, and the water outlet side of the second water delivery pump is provided with a second stop check valve.

[0019] Optionally, the ends of the first total drainage pipeline and the second total drainage pipeline are each separately provided with an electric butterfly valve, a sea drainage pipeline is led out on the pipeline between the two electric butterfly valves, and an electric butterfly valve and a sea drainage check valve are arranged on the sea drainage pipeline.

[0020] Optionally, the first water tank, the second water tank, the third water tank and the fourth water tank are each provided with a high-level alarm and a low-level alarm.

[0021] Optionally, the water inlet end of the first total filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the left side and the right side of the first ship bow;

[0022] And / or, the water inlet end of the second total filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the left side and the right side of the second ship bow.

[0023] Optionally, a third stop check valve is arranged on the first drainage pipeline; a fourth stop check valve is arranged on the second drainage pipeline; a fifth stop check valve is arranged on the third drainage pipeline; and a sixth stop check valve is arranged on the fourth drainage pipeline.

[0024] Optionally, each of the first filling pipeline, the second filling pipeline, the third filling pipeline and the fourth filling pipeline is provided with an electric butterfly valve.

[0025] The second aspect of the present application provides a method for filling, distributing and cleaning fresh water tanks of a double-headed passenger ship, wherein the double-headed passenger ship comprises the double-headed passenger ship of any one of the first aspect of the present application, and the method comprises:

[0026] When the first bow end of the double-headed passenger ship is at a port, the first filling station is enabled to fill the first fresh water tank and the second fresh water tank with fresh water through the first total filling pipeline, the first filling pipeline and the second filling pipeline; then the first total filling pipeline is used to supply water to the second total filling pipeline, and the second total filling pipeline is used to fill the third fresh water tank and the fourth fresh water tank with fresh water through the third filling pipeline and the fourth filling pipeline, respectively.

[0027] Alternatively, when the first bow end of the double-headed passenger ship is at a port, the first fresh water tank, the third fresh water tank and the fourth fresh water tank need to be filled with fresh water, and the second fresh water tank needs to be cleaned: the four fresh water tanks are filled with water at the same time, the second fresh water tank is filled with medicine at the same time, the second filling pipeline is closed after the medicine is filled, the second fresh water tank is cleaned, the second drainage pipeline and the first total drainage pipeline are opened after the cleaning, and the first fresh water delivery pump is started to drain to the sea.

[0028] The present application has the following beneficial effects:

[0029] The two filling stations are connected to the four fresh water tanks through pipelines, and the four fresh water tanks are independent of each other. When the first bow end of the double-headed passenger ship is at a port, the first fresh water tank, the third fresh water tank and the fourth fresh water tank need to be filled with fresh water, and the second fresh water tank needs to be cleaned: the four fresh water tanks are filled with water at the same time, the second fresh water tank is filled with medicine at the same time, the second filling pipeline is closed after the medicine is filled, the second fresh water tank is cleaned, the second drainage pipeline and the first total drainage pipeline are opened after the cleaning, and the first fresh water delivery pump is started to drain to the sea. As can be seen, the second fresh water tank can be cleaned after being filled with fresh water for a period of time, and the other three fresh water tanks can be continuously filled with fresh water while the cleaning is being performed, so that the filling of fresh water and the cleaning of the fresh water tank can be performed at the same time. After the filling of fresh water and the cleaning of the fresh water tank are completed, the fresh water pump can be started immediately to drain water, which greatly improves the work efficiency compared to separately performing the filling of fresh water, the cleaning of the fresh water tank and the draining of the water after cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A structure diagram of a double-headed passenger ship fresh water system according to an embodiment of the present application is shown.

[0031] In the figure: 1, chlorination equipment; 2, dosing hose; 31, first fresh water delivery pump; 32, second fresh water delivery pump; 4, electric butterfly valve; 51, first stop valve; 52, second stop valve; 53, third stop valve; 54, fourth stop valve; 55, fifth stop valve; 56, sixth stop valve; 57, seventh stop valve; 58, eighth stop valve; 61, first stop check valve; 62, second stop check valve; 63, third stop check valve; 64, fourth stop check valve; 65, fifth stop check valve; 66, sixth stop check valve; 7, sea drain check valve; 8, high-level alarm; 9, low-level alarm; 10, shore connection; 11, quick coupling; 121, first drain line; 122, second drain line; 123, third drain line; 124, fourth drain line; 131, first fresh water tank; 132, second fresh water tank; 133, third fresh water tank; 134, fourth fresh water tank; 141, first main filling line; 142, second main filling line; 151, first filling line; 152, second filling line; 153, third filling line; 154, fourth filling line; 161, first filling station; 162, second filling station. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] In the embodiment, the double-head passenger ship has a driving cabin in both directions, i.e. two bows. Two fresh water tanks are arranged in the first bow, and two fresh water tanks are arranged in the second bow. Each fresh water tank is provided with a low-level liquid level alarm and a high-level liquid level alarm. The low-level alarm functions to protect the delivery pump. When the liquid level of the fresh water tank approaches the low level (set value), the low-level alarm outputs a signal to the delivery pump, and the delivery pump stops working automatically after receiving the signal. The high-level alarm functions to fill the fresh water tank. When the liquid level of the fresh water tank approaches the high level (set value), the high-level alarm outputs a signal to stop the filling work on the shore, or to deliver a signal to the delivery pump, and the delivery pump stops working automatically after receiving the signal.

[0034] Referring to Figure 1 The embodiment provides a double-head passenger ship fresh water system, which comprises a first bow and a second bow located at two ends of a ship body, and is characterized in that:

[0035] The first ship bow comprises a first fresh water tank 131, a second fresh water tank 132, a first filling station 161 and a first fresh water delivery pump 31; the filling station is provided with pipelines, electric butterfly valves (convenient for crew operation) and a shore connection 10 connected with a wharf; the water outlet end of the first filling station 161 is connected with a first total filling pipeline 141; the water inlet of the first fresh water tank 131 is connected with a first filling pipeline 151, the water inlet of the second fresh water tank 132 is connected with a second filling pipeline 152, and the first filling pipeline 151 and the second filling pipeline 152 are both connected on the first total filling pipeline 141; the water inlets of the first fresh water tank 131 and the second fresh water tank 132, i.e. the first filling pipeline 151 and the second filling pipeline 152, are provided with electric butterfly valves 4, specifically remote control butterfly valves, which are convenient for crew to fill fresh water in the fresh water tank when the ship is docked and convenient for operation when cleaning.

[0036] The water outlet of the first fresh water tank 131 is connected with a first drainage pipeline 121, the water outlet of the second fresh water tank 132 is connected with a second drainage pipeline 122, the first drainage pipeline 121 and the second drainage pipeline 122 are both connected on a first total drainage pipeline, a first stop valve 51 is arranged on the first total drainage pipeline, and the water inlet end and the water outlet end of the first fresh water delivery pump 31 are both connected on the first total drainage pipeline and on the front and back sides of the first stop valve 51; specifically, the first drainage pipeline 121 and the second drainage pipeline 122 of the first fresh water tank 131 and the second fresh water tank 132 are provided with suction ports with filter screens and stop check valves, the filter screens prevent sundries from entering the pipelines, and the stop check valves prevent water in the pipelines from flowing back into the fresh water tank.

[0037] The second ship bow comprises a third fresh water tank 133, a fourth fresh water tank 134, a second filling station 162 and a second fresh water delivery pump 32; the filling station is provided with pipelines, electric butterfly valves (convenient for crew operation) and a shore connection 10 connected with a wharf; the water outlet end of the second filling station 162 is connected with a second total filling pipeline 142; the water inlet of the third fresh water tank 133 is connected with a third filling pipeline 153, the water inlet of the fourth fresh water tank 134 is connected with a fourth filling pipeline 154, and the third filling pipeline 153 and the fourth filling pipeline 154 are both connected on the second total filling pipeline 142; the water inlets of the third fresh water tank 133 and the fourth fresh water tank 134, i.e. the third filling pipeline 153 and the fourth filling pipeline 154, are provided with electric butterfly valves 4, specifically remote control butterfly valves, which are convenient for crew to fill fresh water in the fresh water tank when the ship is docked and convenient for operation when cleaning.

[0038] The third water draining pipe 123 is connected with the water draining port of the third fresh water tank 133, and the fourth water draining pipe 124 is connected with the water draining port of the fourth fresh water tank 134, both of which are connected with the second total water draining pipe, and the second total water draining pipe is provided with a second stop valve 52, and both the water inlet end and the water outlet end of the second fresh water conveying pump 32 are connected with the second total water draining pipe and are arranged on the front and back sides of the second stop valve 52; the first total filling pipe 141 is communicated with the second total filling pipe 142; specifically, the third water draining pipe 123 and the fourth water draining pipe 124 of the third fresh water tank 133 and the fourth fresh water tank 134 are provided with suction ports with filter screens and stop check valves, the filter screens prevent sundries from entering the pipes, and the stop check valves prevent water in the pipes from flowing back into the fresh water tanks.

[0039] The first fresh water tank 131, the second fresh water tank 132, the third fresh water tank 133 and the fourth fresh water tank 134 are all connected with the dosing equipment; specifically, the chlorine adding equipment 1 is arranged on the first bow and the second bow respectively, and under normal circumstances, the chlorine adding equipment 1 is not communicated with the fresh water tanks. When the fresh water tanks need to be cleaned by adding chlorine, the dosing hose 2 is connected with the chlorine adding pipe through the quick connector 11, the valve is opened, and the chlorine adding equipment 1 is started to add chlorine to the fresh water tanks; specifically, the fifth stop valve 55 is opened to add chlorine to the first fresh water tank 131, the sixth stop valve 56 is opened to add chlorine to the second fresh water tank 132, the seventh stop valve 57 is opened to add chlorine to the third fresh water tank 133, and the eighth stop valve 58 is opened to add chlorine to the fourth fresh water tank 134. It can be seen that the chlorine adding special pipe is arranged on the top of the fresh water tanks, which is used for cleaning the fresh water tanks, and the fresh water and the chlorine are added at the same time without affecting each other.

[0040] Further, the ends of the first total water draining pipe and the second total water draining pipe are butted and communicated with each other;

[0041] The end of the first total filling pipe 141 is connected with the first total water draining pipe and the output side of the first fresh water conveying pump 31;

[0042] The end of the second total filling pipe 142 is connected with the second total water draining pipe and the output side of the second fresh water conveying pump 32.

[0043] Further, the ends of the first total filling pipe 141 and the second total filling pipe 142 are provided with electric butterfly valves 4.

[0044] Further, the water inlet side of the first fresh water conveying pump 31 is provided with a third stop valve 53, and the water outlet side of the first fresh water conveying pump 31 is provided with a first stop check valve 61;

[0045] The water inlet side of the second fresh water conveying pump 32 is provided with a fourth stop valve 54, and the water outlet side of the second fresh water conveying pump 32 is provided with a second stop check valve 62.

[0046] Further, the end of the first and second total drainage pipelines is respectively provided with an electric butterfly valve 4, and a drainage pipeline is led out between the two electric butterfly valves 4, and the drainage pipeline is provided with an electric butterfly valve 4 and a drainage check valve 7, and the drainage check valve 7 is close to the ship body outer plate.

[0047] Further, the first, second, third and fourth fresh water tanks 131, 132, 133 and 134 are respectively provided with a high-level alarm 8 and a low-level alarm 9.

[0048] Further, the water inlet end of the first total filling pipeline 141 is provided with two parallel water inlet branches, and the two water inlet branches are respectively located at the left and right sides of the first ship bow, and each water inlet branch is provided with an electric butterfly valve 4.

[0049] And / or, the water inlet end of the second total filling pipeline 142 is provided with two parallel water inlet branches, and the two water inlet branches are respectively located at the left and right sides of the second ship bow, and each water inlet branch is provided with an electric butterfly valve 4.

[0050] Further, the first drainage pipeline 121 is provided with a third stop check valve 63, the second drainage pipeline 122 is provided with a fourth stop check valve 64, the third drainage pipeline 123 is provided with a fifth stop check valve 65, and the fourth drainage pipeline 124 is provided with a sixth stop check valve 66.

[0051] Further, the first, second, third and fourth filling pipelines 151, 152, 153 and 154 are respectively provided with an electric butterfly valve 4.

[0052] The method for filling, adjusting and cleaning the fresh water tank of the double-headed passenger ship of the embodiment includes:

[0053] When the first ship bow of the double-headed passenger ship is docked, the first filling station 161 is started to fill the first and second fresh water tanks 131 and 132 with fresh water through the first total filling pipeline 141 and the first and second filling pipelines 151 and 152; then the second total filling pipeline 142 is supplied with water through the first total filling pipeline 141, and then the third and fourth fresh water tanks 133 and 134 are filled with fresh water through the second total filling pipeline 142 and the third and fourth filling pipelines 153 and 154, respectively.

[0054] Similarly, when the second bow of the double-headed passenger ship is berthed, the second filling station 162 is activated to fill the third fresh water tank 133 and the fourth fresh water tank 134 with fresh water through the second main filling pipeline 142, the third filling pipeline 153 and the fourth filling pipeline 154; then the second main filling pipeline 142 supplies water to the first main filling pipeline 141, and then the first main filling pipeline 141 supplies water to the first filling pipeline 151 and the second filling pipeline 152 to fill the first fresh water tank 131 and the second fresh water tank 132 with fresh water, respectively.

[0055] When the first bow of the double-headed passenger ship is berthed, the first fresh water tank 131, the third fresh water tank 133 and the fourth fresh water tank 134 need to be filled with fresh water, and the second fresh water tank 132 needs to be cleaned: first, the four fresh water tanks are filled with water at the same time, the second fresh water tank 132 is filled with medicine at the same time, after the medicine is filled, the second filling pipeline 152 is closed, the second fresh water tank 132 is cleaned, after the cleaning, the second drainage pipeline 122 and the first main drainage pipeline are opened, and the first fresh water delivery pump 31 is started to empty the sea. Similarly, through the two fresh water delivery pumps, the fresh water in the four fresh water tanks can be arbitrarily adjusted, emptied or filled.

[0056] In this embodiment, the first fresh water delivery pump 31 is arranged near the fresh water tank of the first bow, and the second fresh water delivery pump 32 is arranged near the fresh water tank of the second bow, and the two delivery pumps are used for fresh water adjustment between the four fresh water tanks and fresh water tank cleaning and sea discharge.

[0057] In summary, the present application creatively solves the problem of quickly filling, adjusting and cleaning the fresh water tank of the double-headed passenger ship in a short berthing period. The time for filling, adjusting and cleaning the fresh water tank of the ship during berthing is shortened, the operation efficiency of the ship is improved, and the operation cost is reduced. The fresh water pipeline system of the ship is fully utilized to meet the needs of ship operation; the problem of fresh water filling, adjustment and cleaning in a very short berthing time is effectively solved; two fresh water delivery pumps are provided to more efficiently adjust the fresh water tank, clean the fresh water tank and discharge the sea; it should be noted that the present application can be applied to all passenger ships or other ships to meet the needs of filling, adjusting and cleaning the fresh water tank.

[0058] The above is the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A double-headed passenger ship fresh water system comprising a first bow and a second bow located at two ends of a ship body, characterized in that: the first bow comprises a first fresh water tank, a second fresh water tank, a first filling station and a first fresh water delivery pump; a water outlet end of the first filling station is connected with a first total filling pipeline; a water inlet of the first fresh water tank is connected with a first filling pipeline, a water inlet of the second fresh water tank is connected with a second filling pipeline, and the first filling pipeline and the second filling pipeline are both connected on the first total filling pipeline; a water outlet of the first fresh water tank is connected with a first drainage pipeline, a water outlet of the second fresh water tank is connected with a second drainage pipeline, and the first drainage pipeline and the second drainage pipeline are both connected on a first total drainage pipeline, a first stop valve is arranged on the first total drainage pipeline, and a water inlet end and a water outlet end of the first fresh water delivery pump are both connected on the first total drainage pipeline and on the front and back sides of the first stop valve; the second bow comprises a third fresh water tank, a fourth fresh water tank, a second filling station and a second fresh water delivery pump; a water outlet end of the second filling station is connected with a second total filling pipeline; a water inlet of the third fresh water tank is connected with a third filling pipeline, a water inlet of the fourth fresh water tank is connected with a fourth filling pipeline, and the third filling pipeline and the fourth filling pipeline are both connected on the second total filling pipeline; a water outlet of the third fresh water tank is connected with a third drainage pipeline, a water outlet of the fourth fresh water tank is connected with a fourth drainage pipeline, and the third drainage pipeline and the fourth drainage pipeline are both connected on a second total drainage pipeline, a second stop valve is arranged on the second total drainage pipeline, and a water inlet end and a water outlet end of the second fresh water delivery pump are both connected on the second total drainage pipeline and on the front and back sides of the second stop valve; the first total filling pipeline and the second total filling pipeline are in communication; the first fresh water tank, the second fresh water tank, the third fresh water tank and the fourth fresh water tank are all connected with a dosing device; the first total drainage pipeline and the second total drainage pipeline are butt-jointed and in communication with each other; a terminal end of the first total filling pipeline is connected on the first total drainage pipeline and on the output side of the first fresh water delivery pump; a terminal end of the second total filling pipeline is connected on the second total drainage pipeline and on the output side of the second fresh water delivery pump; an electric butterfly valve is arranged on each of the first filling pipeline, the second filling pipeline, the third filling pipeline and the fourth filling pipeline. 2.The double-headed passenger ship fresh water system according to claim 1, characterized in that: terminal ends of the first total filling pipeline and the second total filling pipeline are provided with electric butterfly valves. 3.The double-headed passenger ship fresh water system according to claim 1 or 2, characterized in that: a third stop valve is arranged on the water inlet side of the first fresh water delivery pump, and a first stop check valve is arranged on the water outlet side of the first fresh water delivery pump; a fourth stop valve is arranged on the water inlet side of the second fresh water delivery pump, and a second stop check valve is arranged on the water outlet side of the second fresh water delivery pump. 4.The double-headed passenger ship fresh water system according to claim 1 or 2, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The end of the first and second total drainage pipelines is respectively provided with an electric butterfly valve, and a drainage pipeline is led out on the pipeline between the two electric butterfly valves, and the electric butterfly valve and a sea drainage check valve are arranged on the drainage pipeline.

5. The double-headed passenger ship fresh water system according to any one of claims 1-2, characterized in that: High and low level alarms are arranged on the first, second, third and fourth fresh water tanks.

6. The double-headed passenger ship fresh water system according to any one of claims 1-2, characterized in that: The water inlet end of the first total filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the left and right sides of the first bow; And / or, the water inlet end of the second total filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the left and right sides of the second bow.

7. The double-headed passenger ship fresh water system according to any one of claims 1-2, characterized in that: A third stop check valve is arranged on the first drainage pipeline, a fourth stop check valve is arranged on the second drainage pipeline, a fifth stop check valve is arranged on the third drainage pipeline, and a sixth stop check valve is arranged on the fourth drainage pipeline.

8. A method for filling, transferring and cleaning the fresh water tank of a double-ended passenger ship, characterized in that: The double-headed passenger ship comprises the double-headed passenger ship fresh water system according to any one of claims 1-7, and the method comprises: When the first bow of the double-headed passenger ship is docked, the first filling station is enabled to fill the first and second fresh water tanks through the first total filling pipeline and the first and second filling pipelines, and then water is supplied to the second total filling pipeline through the first total filling pipeline, and then the third and fourth fresh water tanks are filled with water through the second total filling pipeline. Or, when the first bow of the double-headed passenger ship is docked, the first, third and fourth fresh water tanks need to be filled with water, and the second fresh water tank needs to be cleaned: the four fresh water tanks are filled with water at the same time, the second fresh water tank is filled with chemicals at the same time, the second filling pipeline is closed after the chemicals are added, the second fresh water tank is cleaned, and after cleaning, the second drainage pipeline and the first total drainage pipeline are opened, and the first fresh water delivery pump is started to be emptied and discharged to the sea.

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