Ventilation system for double-material place of ship

Abstract

The invention belongs to the technical field of ship manufacturing, and discloses a ventilation system for a double-material place of a ship. The ship double-material place ventilation system comprises a gas fuel place, an air supply pipeline, an exhaust pipeline and a first heat exchanger. The gas fuel position is provided with a first air inlet and a first air outlet, the air supply pipeline is communicated with the first air inlet, and the exhaust pipeline is communicated with the first air outlet. The first heat exchanger is located on the air supply pipeline and connected with the ship non-freezing liquid system, and non-freezing liquid in the ship non-freezing liquid system exchanges heat with air in the air supply pipeline. According to the ventilation system for the double-material place of the ship, the problem that the temperature of the gas fuel place is reduced under the conditions that the ventilation frequency is large and the ventilation quantity is large is effectively solved; and the air in the air supply pipeline is heated by using the waste heat of the non-freezing liquid in the ship non-freezing liquid system, so that the cost can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a ventilation system for a ship's dual-fuel compartment. Background Art

[0002] The ship's dual-fuel combustion compartments refer to the ship's fuel tank connection compartment (TCR) and the fuel preparation room (FGHR). With the continuous emergence of new dual-fuel (LNG, methanol, NH3, etc.) ships, the ventilation layout requirements for the ship's gas fuel compartments are more stringent. For example, the relevant specifications of each classification society, IGF, and the relevant specifications for IMO gas fuel ships all put forward the minimum air change rate requirement of 30 times per hour for negative pressure ventilation and air change in gas fuel compartments such as fuel tank connection compartments and fuel preparation rooms.

[0003] For ships sailing in the conventional unlimited navigation area, the ventilation requirements for gas fuel compartments are generally easy to meet and do not consume a large amount of heat energy. However, for dual-fuel tankers sailing in polar regions, due to the external low temperature environment generally reaching about -40°C, while the normal operating environment requirements for the equipment and pipeline valves in the gas fuel compartment generally reach about 5°C, a huge ventilation volume will lead to a large consumption of heat energy and reduce the temperature of the gas combustion area. That is, there is a problem that too many ventilation times and too large a ventilation volume will reduce the temperature of the combustion area.

[0004] Therefore, it is urgent to propose a ventilation system for a ship's dual-fuel compartment to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a ventilation system for a ship's dual-fuel compartment, which effectively solves the problem of reducing the temperature of the gas fuel compartment in the case of many ventilation times and a large ventilation volume, and is particularly suitable for dual-fuel ships sailing in polar regions; and uses the waste heat of the antifreeze in the ship's antifreeze system to heat the air in the air supply pipeline, which can save costs.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A ventilation system for a ship's dual-fuel compartment, comprising:

[0008] A gas fuel compartment, which is provided with a first air inlet and a first air outlet;

[0009] An air supply pipeline, which is communicated with the first air inlet;

[0010] An exhaust pipeline, which is communicated with the first air outlet;

[0011] The first heat exchanger is located on the air supply pipeline. The first heat exchanger is connected to the ship's antifreeze system, and the antifreeze in the ship's antifreeze system exchanges heat with the air in the air supply pipeline.

[0012] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, the ventilation system of the ship's double-purpose compartment further includes a second heat exchanger. The second heat exchanger is located in both the air supply pipeline and the exhaust pipeline. The air in the air supply pipeline exchanges heat with the air in the exhaust pipeline in the second heat exchanger and then flows through the first heat exchanger.

[0013] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, the ventilation system of the ship's double-purpose compartment further includes an exhaust fan. The exhaust fan is located on the exhaust pipeline and between the second heat exchanger and the first air outlet.

[0014] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, there are two exhaust fans. One of the exhaust fans operates as a working unit, and the other exhaust fan serves as a spare unit.

[0015] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, an electric air damper is provided on the exhaust pipeline. The electric air damper is used to open or close the exhaust pipeline.

[0016] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, the electric air damper and the exhaust fan can be interlocked for control.

[0017] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, the ventilation system of the ship's double-purpose compartment further includes a supply fan. The supply fan is located on the air supply pipeline and between the first heat exchanger and the first air inlet.

[0018] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, the ventilation system of the ship's double-purpose compartment further includes a differential pressure sensor. The differential pressure sensor is located inside the gas fuel compartment and is used to detect the pressure difference inside and outside the gas fuel compartment.

[0019] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, an air supply grille is provided at the first air inlet, and an air outlet grille is provided at the first air outlet.

[0020] As an alternative technical solution for the ventilation system of the ship's double-purpose compartment, a second air inlet is provided at the initial end of the air supply pipeline, and a second air outlet is provided at the end of the exhaust pipeline. Anti-freezing louvers are provided at both the second air inlet and the second air outlet.

[0021] Advantages of the present invention:

[0022] The air supply pipeline of the ship double-fuel place ventilation system provided by the present invention is provided with a first heat exchanger, the first heat exchanger is connected to the ship's antifreeze system, the antifreeze in the ship's antifreeze system exchanges heat with the air in the air supply pipeline, so that the air in the air supply pipeline is heated by the first heat exchanger before entering the gas fuel place, and then enters the gas fuel place, which can avoid the air temperature entering the gas fuel place due to ventilation being too low to affect the temperature in the gas fuel place, and effectively solves the problem of reducing the temperature of the gas fuel place when the ventilation times are many and the ventilation volume is large; and the waste heat of the antifreeze in the ship's antifreeze system is used to heat the air in the air supply pipeline, which can save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The schematic diagram of the ventilation system for a double-material space of a ship provided by an embodiment of the present invention is shown in FIG.

[0024] In the figure:

[0025] 100. Gas fuel space; 200. First heat exchanger; 300. Second heat exchanger; 400. Exhaust fan; 500. Electric damper; 600. Supply fan; 700. Pressure difference sensor; 810. Supply air grille; 820. Outlet air grille; 900. Antifreeze shutter. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] The present invention provides a ventilation system for a dual-purpose compartment of a ship. This ventilation system for the dual-purpose compartment of the ship effectively solves the problem of reducing the temperature of the gas fuel compartment under the conditions of frequent ventilation and large ventilation volume, and is especially applicable to dual-fuel ships for polar navigation. Moreover, by using the waste heat of the antifreeze in the ship's antifreeze system to heat the air in the air supply pipeline, cost can be saved.

[0031] Specifically, as Figure 1 shown, this ventilation system for the dual-purpose compartment of the ship includes a gas fuel compartment 100, an air supply pipeline, an exhaust pipeline and a first heat exchanger 200. The gas fuel compartment 100 is provided with a first air inlet and a first air outlet. The air supply pipeline is communicated with the first air inlet, and the exhaust pipeline is communicated with the first air outlet. The first heat exchanger 200 is located on the air supply pipeline. The first heat exchanger 200 is connected to the ship's antifreeze system, and the antifreeze in the ship's antifreeze system exchanges heat with the air in the air supply pipeline.

[0032] Based on the above design, the first heat exchanger 200 is located on the air supply pipeline. The first heat exchanger 200 is connected to the ship's antifreeze system. The antifreeze in the ship's antifreeze system can flow through the first heat exchanger 200, enabling the antifreeze in the ship's antifreeze system to exchange heat with the air in the air supply pipeline. That is, the air in the air supply pipeline is heated by the first heat exchanger 200 before entering the gas fuel compartment 100, which can prevent the air temperature entering the gas fuel compartment 100 due to ventilation from being too low and affecting the temperature in the gas fuel compartment 100. It effectively solves the problem of reducing the temperature in the gas fuel compartment 100 in the case of a large number of ventilation times and a large ventilation volume, and is especially suitable for dual-fuel ships sailing in polar regions. Moreover, by using the waste heat of the antifreeze in the ship's antifreeze system to heat the air in the air supply pipeline, there is no need to separately set a flowing medium for the first heat exchanger 200, and the utilization of the waste heat of the antifreeze can save costs.

[0033] It should be noted that at an external low air temperature of about -40°C, the ship's dual-fuel compartment ventilation system can meet the requirement of the gas fuel compartment 100 for negative pressure ventilation and air change 30 times per hour, while the temperature in the gas fuel compartment 100 reaches about 5°C to meet the environmental control requirements and ensure the normal operation of the equipment and pipeline valves in the gas fuel compartment 100.

[0034] To further save energy and reduce consumption, the ship's dual-fuel compartment ventilation system further includes a second heat exchanger 300. The second heat exchanger 300 is located in both the air supply pipeline and the exhaust pipeline at the same time. The air in the air supply pipeline exchanges heat with the air in the exhaust pipeline in the second heat exchanger 300 and then flows through the first heat exchanger 200. The waste heat of the air discharged from the gas fuel compartment 100 is used to heat the fresh air entering the gas fuel compartment 100, and the air is heated before the first heat exchanger 200 to further increase the temperature of the fresh air entering the gas fuel compartment 100.

[0035] It should be noted that both the first heat exchanger 200 and the second heat exchanger 300 are sensible heat exchangers. The working principle and heat exchange principle of sensible heat exchangers are well-known existing technologies and will not be elaborated in detail here.

[0036] Furthermore, the ship's dual-fuel compartment ventilation system further includes an exhaust fan 400. The exhaust fan 400 is located on the exhaust pipeline and between the second heat exchanger 300 and the first air outlet. The exhaust fan 400 is used to discharge the air in the gas fuel compartment 100 to the outside. The working principle of the exhaust fan 400 is a well-known existing technology and will not be elaborated in detail here.

[0037] In this embodiment, there are two exhaust fans 400. One of the exhaust fans 400 works as a used part, and the other exhaust fan 400 is reserved as a spare part. The one-spare-one-used setting can meet the ventilation rate of 30 times per hour for the gas fuel area 100 required by the specification. Of course, the two exhaust fans 400 are connected in parallel, and switches are provided at both exhaust fans to meet the requirement of only enabling one exhaust fan 400.

[0038] In this embodiment, an electric air damper 500 is provided on the exhaust air pipeline. The electric air damper 500 is used to open or close the exhaust air pipeline to achieve the electric control of the ventilation system for the double-material area of the ship.

[0039] Furthermore, the electric air damper 500 and the exhaust fan 400 can be interlocked for control to improve the intelligence of the ventilation system for the double-material area of the ship.

[0040] Optionally, the ventilation system for the double-material area of the ship further includes a supply fan 600. The supply fan 600 is located on the supply air pipeline and between the first heat exchanger 200 and the first air inlet, and is used to send the outdoor air heated by the first heat exchanger 200 into the gas fuel area 100 to accelerate the ventilation effect. Similarly, the working principle of the supply fan 600 is also a very mature existing technology, and will not be elaborated in detail here.

[0041] Furthermore, the ventilation system for the double-material area of the ship further includes a differential pressure sensor 700. The differential pressure sensor 700 is located inside the gas fuel area 100 and is used to detect the internal and external pressure difference of the gas fuel area 100. According to the internal and external pressure difference of the gas fuel area 100, the air volume of the supply fan 600 is controlled by frequency conversion to ensure that the gas fuel area 100 is in a negative pressure state.

[0042] Optionally, a supply air grille 810 is provided at the first air inlet to evenly send the air (outdoor air) in the supply air pipeline to the gas fuel area 100; an air outlet grille 820 is provided at the first air outlet to evenly discharge the air in the gas fuel area 100 to the exhaust air pipeline (outdoor). Similarly, the working principle of the differential pressure sensor 700 is also a very mature existing technology, and will not be elaborated in detail here.

[0043] In this embodiment, the first air inlet includes a plurality of inlets arranged at intervals. Exemplarily, the inlets can be two, three, four or six, etc. A plurality of supply air grilles 810 are respectively located at the corresponding inlets; the first air outlet includes a plurality of outlets arranged at intervals. Exemplarily, the outlets can be two, three, four or six, etc. A plurality of air outlet grilles 820 are respectively located at the corresponding outlets.

[0044] Optionally, a second air inlet is provided at the initial end of the air supply duct, and a second air outlet is provided at the end of the exhaust duct. Antifreeze shutters 900 are provided at the second air inlet and the second air outlet, and the antifreeze shutters 900 have an electric heating antifreeze function.

[0045] It should also be noted that the air circulation direction in the ventilation system of the double-material space of the ship (partial arrow direction in the figure) is that the external air enters the air supply duct from the antifreeze shutter 900 of the second air inlet, flows through the second heat exchanger 300, the first heat exchanger 200 and the air supply fan 600 in the air supply duct in sequence, and enters the gas fuel space 100 through the air supply grille 810 at the first air inlet; the air entering the gas fuel space 100 is blown out of the gas fuel space 100 through the air outlet grille 820 at the first outlet and enters the exhaust duct, and after flowing through the exhaust fan 400 and the second heat exchanger 300 in the exhaust duct in sequence, it is discharged to the external environment through the antifreeze shutter 900 at the first air outlet.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A double-space ventilation system for ships, characterized in that: include: A gas fuel location (100), wherein the gas fuel location (100) is provided with a first air inlet and a first air outlet; an air supply pipeline, the air supply pipeline being in communication with the first air inlet; an exhaust duct, the exhaust duct being in communication with the first air outlet; A first heat exchanger (200), wherein the first heat exchanger (200) is located on the air supply pipeline, the first heat exchanger (200) is connected to a ship antifreeze system, and the antifreeze in the ship antifreeze system exchanges heat with the air in the air supply pipeline.

2. The ship double-material space ventilation system according to claim 1, characterized in that: The ship dual-material space ventilation system further comprises a second heat exchanger (300), the second heat exchanger (300) being located in both the air supply pipeline and the exhaust pipeline, and the air in the air supply pipeline and the air in the exhaust pipeline are heat-exchanged in the second heat exchanger (300) and then flow through the first heat exchanger (200).

3. The ship double-material space ventilation system according to claim 2, characterized in that: The ship dual-material space ventilation system further comprises an exhaust fan (400), wherein the exhaust fan (400) is located on the exhaust duct and between the second heat exchanger (300) and the first air outlet.

4. The ship double-material space ventilation system according to claim 3, characterized in that: Two exhaust fans (400) are provided, one of which is used as a working part and the other is used as a spare part.

5. The ship double-material space ventilation system according to claim 3, characterized in that: The exhaust duct is provided with an electric damper (500), and the electric damper (500) is used to open or close the exhaust duct.

6. The ship double-material space ventilation system according to claim 5, characterized in that: The electric damper (500) and the exhaust fan (400) can be controlled in a chain manner.

7. The ship double-material space ventilation system according to claim 1, characterized in that: The ship dual-material space ventilation system further comprises an air blower (600), wherein the air blower (600) is located on the air supply pipeline and between the first heat exchanger (200) and the first air inlet.

8. The ship double-material space ventilation system according to claim 7, characterized in that: The ship dual-fuel space ventilation system further comprises a pressure difference sensor (700), wherein the pressure difference sensor (700) is located in the gas fuel space (100) and is used to detect the pressure difference between the inside and outside of the gas fuel space (100).

9. The ship double-material space ventilation system according to claim 1, characterized in that: An air supply grille (810) is provided at the first air inlet, and an air outlet grille (820) is provided at the first air outlet.

10. The ship double-material space ventilation system according to claim 1, characterized in that: A second air inlet is provided at the initial end of the air supply duct, and a second air outlet is provided at the end of the air exhaust duct. Antifreeze shutters (900) are provided at the second air inlet and the second air outlet.

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