Methanol gas permeation system for a marine vessel

Abstract

The present application relates to the technical field of ship venting pipeline arrangement, and discloses a methanol venting system for a ship, comprising a first venting pipeline, a second venting pipeline, a third venting pipeline, a fourth venting pipeline and a fifth venting pipeline; the system is split into the first venting pipeline, the second venting pipeline, the third venting pipeline, the fourth venting pipeline and the fifth venting pipeline, so that the characteristics of different structures in the ship are utilized to complete the venting function, and the space occupation of the open deck surface can be reduced under the premise of ensuring safety, the work of the crew is avoided from being affected, and the anti-collision facilities arranged outside the pipeline are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship venting pipeline arrangement, and particularly relates to a methanol venting system for a ship. BACKGROUND

[0002] At present, methanol fuel is widely applied to ships because it meets the concept of low carbon and environmental protection. However, as a low-flash-point volatile and toxic fuel, the methanol fuel needs to reduce its influence on the ship and personnel as much as possible when used on the ship. The existing methanol venting mode mainly communicates the methanol fuel tank with the outside of the ship body through a pipeline, and the pipeline is mainly arranged at an open deck surface, for example, a passageway on the deck surface or a hatch coaming transverse frame, so that the methanol fuel can be directly diluted in the air when leakage occurs.

[0003] However, such an arrangement mode can occupy the width of the main deck surface passageway, making it inconvenient for the crew to walk, and even causing the passageway width of some ships to not meet the regulatory requirement of not less than 600 mm. In addition, anti-collision facilities need to be arranged outside the pipeline, increasing the shipbuilding cost. SUMMARY

[0004] The present application aims to provide a methanol venting system for a ship, which can reduce the space occupation of the open deck surface, avoid the influence on the work of the crew, and avoid the arrangement of anti-collision facilities outside the pipeline under the premise of ensuring safety.

[0005] To achieve the above objectives, the present invention provides a methanol venting system for ships. The ship includes a superstructure, a methanol tank, a fuel preparation passage, a cargo hold, a side compartment, and an isolation compartment. The superstructure, the side compartment, the cargo hold, and the methanol tank are arranged sequentially along a first direction. The fuel preparation passage is located on one side of the side compartment in a second direction. The methanol tank includes a methanol fuel tank and a fuel preparation compartment arranged sequentially along the second direction, with the side of the fuel preparation compartment facing away from the methanol fuel tank connected to the fuel preparation passage. The isolation compartment is located between the methanol tank and the cargo hold and includes: a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe, and a fifth vent pipe. The first vent pipe is connected at one end to the top of the methanol fuel tank and at the other end to the isolation compartment; the second vent pipe is connected at one end to the other end of the first vent pipe and at the other end passes through the fuel preparation compartment to the fuel preparation passage; the third vent pipe is located in the fuel preparation passage and is connected at one end to the other end of the second vent pipe, and at the other end extends toward the side compartment; the fourth vent pipe is connected at one end to the other end of the third vent pipe and at the other end extends into the side compartment and toward the superstructure; the fifth vent pipe is connected at one end to the other end of the fourth vent pipe and at the other end passes through the superstructure to the outside of the ship.

[0006] Optionally, the side of the methanol fuel tank facing the fuel preparation room protrudes from the side of the isolation chamber facing the fuel preparation room, and the portion of the methanol fuel tank protruding from the isolation chamber is a protrusion. One end of the first vent pipe is connected to the top of the protrusion, and the other end extends along the first direction.

[0007] Optionally, it also includes a methanol concentration detection device, which is located in the fuel preparation channel and is used to detect the methanol concentration in the fuel preparation channel.

[0008] Optionally, the side-mounted empty compartment includes multiple compartments arranged sequentially along the second direction, and any two adjacent compartments are connected by a doorway. The other end of the fourth ventilation duct passes through multiple compartments and multiple doorways in sequence and is connected to the fifth ventilation duct.

[0009] Optionally, it also includes an oxygen concentration detection device, which is provided in multiple of the chambers and is used to detect the oxygen concentration in the chamber.

[0010] Optionally, the system also includes a fan, which is provided in each of the multiple chambers, and the fan is used to discharge methanol from the chamber.

[0011] Optionally, the fourth gas-permeable pipeline is a single-walled pipeline.

[0012] Optionally, the fourth gas-permeable pipeline extends upward along the second direction.

[0013] Compared with the prior art, the methanol gas-permeable system for a ship has the beneficial effects that: by splitting the system into a first gas-permeable pipeline, a second gas-permeable pipeline, a third gas-permeable pipeline, a fourth gas-permeable pipeline and a fifth gas-permeable pipeline, the characteristics of different structures in the ship are utilized to complete the gas-permeable function, specifically, by arranging the first gas-permeable pipeline and the second gas-permeable pipeline in the methanol tank and arranging the third gas-permeable pipeline in the fuel preparation passage, the ventilation capacity and the methanol detection capacity of the methanol fuel tank, the fuel preparation room and the fuel preparation passage are utilized to ensure that the gas-phase methanol generated from the methanol fuel tank can be safely transported to the side empty tank, so that the harm caused by methanol leakage is minimized, by arranging the fourth gas-permeable pipeline in the side empty tank, the space in the side empty tank is utilized to avoid that the fourth gas-permeable pipeline occupies the space of the open deck, thereby avoiding the influence on the work of workers, and since the side empty tank is not stacked with goods, the fourth gas-permeable pipeline does not need to worry about being damaged by the goods, and does not need to be provided with anti-collision facilities outside the pipeline, and finally the fifth gas-permeable pipeline is communicated with the outside of the ship to complete the gas-permeable function. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the arrangement of the methanol gas-permeable system for a ship according to the embodiment of the present application;

[0015] Figure 2 is a schematic diagram of the arrangement of the methanol gas-permeable system for a ship according to the embodiment of the present application; Figure 1 is an enlarged view of A of the methanol gas-permeable system for a ship according to the embodiment of the present application;

[0016] Figure 3 is a schematic diagram of the arrangement of the methanol gas-permeable system for a ship according to the embodiment of the present application when the first gas-permeable pipeline does not pass through the isolation empty tank;

[0017] Figure 4 is a schematic diagram of the arrangement of the methanol gas-permeable system for a ship according to the embodiment of the present application; Figure 3 is an enlarged view of B of the methanol gas-permeable system for a ship according to the embodiment of the present application.

[0018] In the drawings, 1 is a ship; 11 is a superstructure; 12 is a methanol tank; 121 is a methanol fuel tank; 122 is a fuel preparation room; 13 is a fuel preparation passage; 14 is a cargo tank; 15 is a side empty tank; 151 is a tank body; 16 is an isolation empty tank; 2 is a first gas-permeable pipeline; 3 is a second gas-permeable pipeline; 4 is a third gas-permeable pipeline; 5 is a fourth gas-permeable pipeline; 6 is a fifth gas-permeable pipeline; 7 is a methanol concentration detection device; 8 is an oxygen concentration detection device; 9 is a fan; X is a first direction; Y is a second direction. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] like Figure 1 and Figure 2 As shown in the embodiment of the present invention, a methanol venting system for a ship 1 is provided. The ship 1 includes a superstructure 11, a methanol tank 12, a fuel preparation passage 13, a cargo hold 14, a side empty compartment 15, and an isolation empty compartment 16. The superstructure 11, the side empty compartment 15, the cargo hold 14, and the methanol tank 12 are arranged sequentially along a first direction X. The fuel preparation passage 13 is located on one side of the side empty compartment 15 in a second direction Y. The methanol tank 12 includes a methanol fuel tank 121 and a fuel preparation compartment 122 arranged sequentially along the second direction Y. The side of the fuel preparation compartment 122 facing away from the methanol fuel tank 121 is connected to the fuel preparation passage 13. The isolation empty compartment 16 is located between the methanol tank 12 and the cargo hold 14 and includes: a first venting pipe 2, a second venting pipe 3, and a third venting pipe 4. The first vent 2 is connected at one end to the top of the methanol fuel tank 121 and at the other end to the isolation compartment 16; the second vent 3 is connected at one end to the other end of the first vent 2 and at the other end passes through the fuel preparation compartment 122 to the fuel preparation passage 13; the third vent 4 is located in the fuel preparation passage 13 and is connected at one end to the other end of the second vent 3 and at the other end to the side compartment 15; the fourth vent 5 is connected at one end to the other end of the third vent 4 and at the other end to the side compartment 15 and to the superstructure 11; the fifth vent 6 is connected at one end to the other end of the fourth vent 5 and at the other end passes through the superstructure 11 to the outside of the ship 1.

[0023] Based on the above scheme, by splitting the system into the first ventilation pipeline 2, the second ventilation pipeline 3, the third ventilation pipeline 4, the fourth ventilation pipeline 5 and the fifth ventilation pipeline 6, the characteristics of different structures in the ship 1 are utilized to complete the ventilation function. Specifically, by arranging the first ventilation pipeline 2 and the second ventilation pipeline 3 in the methanol cabin 12 and arranging the third ventilation pipeline 4 in the fuel preparation passage 13, the ventilation capacity and the methanol detection capacity of the methanol fuel cabin 121, the fuel preparation room 122 and the fuel preparation passage 13 are utilized to ensure that the methanol gas generated from the methanol fuel cabin 121 can be safely transported to the side empty cabin 15, so that the harm caused by methanol leakage is minimized. By arranging the fourth ventilation pipeline 5 in the side empty cabin 15, the fourth ventilation pipeline 5 is prevented from occupying space on the open deck surface. Since there are few workers in the side empty cabin 15, the work of the workers is also prevented from being affected. Moreover, since there is no cargo accumulation in the side empty cabin 15, the fourth ventilation pipeline 5 does not need to worry about being damaged by the cargo, and there is no need to arrange anti-collision facilities outside the pipeline. Finally, the fifth ventilation pipeline 6 is connected with the outside of the ship 1 to complete the ventilation function.

[0024] As shown in Figure 3 and Figure 4 , in order to facilitate construction and maintenance, the side of the methanol fuel cabin 121 facing the fuel preparation room 122 protrudes from the side of the isolation empty cabin 16 facing the fuel preparation room 122, and the part of the methanol fuel cabin 121 protruding from the isolation empty cabin 16 is a protruding part. One end of the first ventilation pipeline 2 is connected with the top of the protruding part, and the other end extends along the first direction X. In this way, when the second ventilation pipeline 3 is connected with the first ventilation pipeline 2, it does not need to pass through the isolation empty cabin 16, which can reduce the number of steel pipe cabin pieces, thereby facilitating construction and maintenance.

[0025] As shown in Figure 2 , in order to facilitate detection of the methanol leakage of the third ventilation pipeline 4, a methanol concentration detection device 7 is further included. The methanol concentration detection device 7 is arranged in the fuel preparation passage 13 and is used to detect the methanol concentration in the fuel preparation passage 13.

[0026] As shown in Figure 2 , in order to reduce the amount of construction, the side empty cabin 15 includes a plurality of cabin bodies 151 arranged in sequence along the second direction Y, and any two adjacent cabin bodies 151 are connected and communicated through a door opening. The other end of the fourth ventilation pipeline 5 sequentially passes through the plurality of cabin bodies 151 and the plurality of door openings and is connected with the fifth ventilation pipeline 6. Since the cabin body 151 does not have a requirement on the passage width, the fourth ventilation pipeline 5 can pass through the door opening without additional hole opening except for passing through the watertight wall structure, thereby reducing the amount of construction.

[0027] As shown in Figure 2As shown, to ensure the safety of the fourth vent pipe, an oxygen concentration detection device 8 is also included. Each of the multiple compartments 151 is equipped with an oxygen concentration detection device 8. The oxygen concentration detection device 8 is used to detect the oxygen concentration in the compartment 151. Since the compartment 151 is naturally ventilated through its own vent pipe, methanol gas leaking from the fourth vent pipe is more likely to accumulate in the compartment 151. Furthermore, since crew members generally do not go into the compartment 151, even if there is a leak, it will not affect the crew members. Therefore, by simply installing the oxygen concentration detection device 8 in the compartment 151, the leakage of the fourth vent pipe can be quickly detected, and thus, rapid maintenance can be carried out.

[0028] like Figure 2 As shown, in order to further ensure the safety of the fourth vent pipe, a fan 9 is also included. Fans 9 are installed in multiple compartments 151. The fans 9 are used to discharge methanol from the compartments 151. When the oxygen concentration detection device 8 issues an alarm for low oxygen concentration, the crew can close the inlet and outlet valves of the methanol compartment 12 and use the fans 9 to force ventilation of the compartment 151 to dilute the gaseous methanol in the compartment 151 to the outside.

[0029] Optionally, to reduce costs, the fourth vent pipe 5 is a single-walled pipe. Since the fourth vent pipe 5 is located in the side air compartment 15, there is no need to worry about the risk of methanol leakage. Therefore, the fourth vent pipe 5 is set as a single-walled pipe to reduce shipbuilding costs and facilitate construction.

[0030] In some embodiments, the first ventilator 2, the second ventilator 3, and the third ventilator 4 are all single-walled pipes.

[0031] like Figure 1 As shown, in order to avoid the accumulation of liquid methanol in the fourth vent pipe, the fourth vent pipe 5 extends upward at an angle along the second direction Y.

[0032] In summary, the methanol gas permeation system for the ship 1 provided by the embodiment of the present application splits the system into the first permeation pipeline 2, the second permeation pipeline 3, the third permeation pipeline 4, the fourth permeation pipeline 5 and the fifth permeation pipeline 6 to utilize the characteristics of different structures in the ship 1 to complete the gas permeation function. Specifically, the first permeation pipeline 2 and the second permeation pipeline 3 are arranged in the methanol cabin 12, and the third permeation pipeline 4 is arranged in the fuel preparation passage 13 to utilize the ventilation capacity and the methanol detection capacity of the methanol fuel cabin 121, the fuel preparation room 122 and the fuel preparation passage 13 to ensure that the methanol gas generated from the methanol fuel cabin 121 can be safely transported to the side empty cabin 15, so that the harm caused by methanol leakage is minimized. The fourth permeation pipeline 5 is arranged in the side empty cabin 15 to avoid the space occupation of the fourth permeation pipeline 5 on the open deck surface and avoid the influence on the work of workers. Since the side empty cabin 15 is not stacked with goods, the fourth permeation pipeline 5 also does not need to worry about being damaged by the goods, and does not need to be provided with anti-collision facilities outside the pipeline. Finally, the fifth permeation pipeline 6 is communicated with the outside of the ship 1 to complete the gas permeation function.

[0033] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A methanol gas permeation system for a ship, the ship comprising a superstructure, a methanol cabin, a fuel preparation passage, a cargo cabin, a side empty cabin and an isolation empty cabin, the superstructure, the side empty cabin, the cargo cabin and the methanol cabin being arranged in sequence along a first direction, the fuel preparation passage being arranged on one side of the side empty cabin in a second direction, the methanol cabin comprising a methanol fuel cabin and a fuel preparation room arranged in sequence along the second direction, and one side of the fuel preparation room facing away from the methanol fuel cabin being connected with the fuel preparation passage, the isolation empty cabin being arranged between the methanol cabin and the cargo cabin, characterized in that, The application relates to a methanol fuel tank for a ship, which comprises: a first air pipe, a second air pipe, a third air pipe, a fourth air pipe and a fifth air pipe; one end of the first air pipe is connected to the top of the methanol fuel tank, and the other end of the first air pipe extends into the isolated empty cabin; one end of the second air pipe is connected to the other end of the first air pipe, and the other end of the second air pipe extends into the fuel preparation channel through the fuel preparation room; the third air pipe is located in the fuel preparation channel, one end of the third air pipe is connected to the other end of the second air pipe, and the other end of the third air pipe extends towards the side empty cabin; one end of the fourth air pipe is connected to the other end of the third air pipe, the other end of the fourth air pipe extends into the side empty cabin and extends towards the superstructure; one end of the fifth air pipe is connected to the other end of the fourth air pipe, and the other end of the fifth air pipe extends to the outside of the ship through the superstructure; a methanol concentration detection device is arranged in the fuel preparation channel and used for detecting the methanol concentration in the fuel preparation channel; the side empty cabin comprises a plurality of cabin bodies arranged in the second direction in sequence, any two adjacent cabin bodies are connected and communicated through a door hole, and the other end of the fourth air pipe sequentially extends through a plurality of the cabin bodies and a plurality of the door holes and is connected to the fifth air pipe; an oxygen concentration detection device is arranged in each of the plurality of cabin bodies, and the oxygen concentration detection device is used for detecting the oxygen concentration in the cabin body; a fan is arranged in each of the plurality of cabin bodies, and the fan is used for discharging the methanol in the cabin body.

2. The methanol gas permeation system for a marine vessel according to claim 1, characterized by, The side of the methanol fuel tank towards the fuel preparation room protrudes from the side of the isolated empty cabin towards the fuel preparation room, and the part of the methanol fuel tank protruding from the isolated empty cabin is a protruding part, one end of the first air pipe is connected to the top of the protruding part, and the other end of the first air pipe extends in the first direction.

3. The methanol gas permeation system for a marine vessel according to claim 1, characterized by, The fourth air pipe is a single-wall pipe.

4. A methanol gas permeation system for a marine vessel according to any one of claims 1-3, characterized in that, The fourth air pipe extends upwards in the second direction. The fourth air pipe extends upwards in the second direction.

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