Ship waste heat recovery ventilation system and ship

Abstract

The present application belongs to the technical field of ship ventilation, and discloses a ship waste heat recovery ventilation system and a ship. The ship waste heat recovery ventilation system comprises a fresh air system and a waste heat recovery system. The fresh air system is used for introducing fresh air from the external environment into the ship cabin. The waste heat recovery system comprises a waste gas air heater and a waste gas boiler. The waste gas air heater is internally provided with a heating flow channel and a heat exchange flow channel. The air inlet end of the heating flow channel is in communication with the flue gas outlet of the waste gas boiler. The air outlet end of the heating flow channel is in communication with the external environment. The air inlet end of the heat exchange flow channel is in communication with the inside of the ship cabin. The air outlet end of the heat exchange flow channel is selectively in communication with the fresh air system or the external environment. The waste heat generated by the combustion of waste gas is used by the waste gas air heater to heat the air in the heat exchange flow channel. The heated air is circulated to the inside of the ship cabin through the fresh air system to achieve the effect of cyclic heating. The system has high energy utilization rate and does not need to consume additional energy, thereby reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of marine ventilation technology, and more particularly to a marine waste heat recovery ventilation system and a ship. Background Technology

[0002] In polar regions, the ambient air temperature is generally low during winter (e.g., -40℃), while various mechanical equipment in the engine room of a ship needs to be in a suitable ambient temperature to work properly. Generally, the normal operating temperature of mechanical equipment is required to be above 5℃.

[0003] To ensure the normal operation of mechanical equipment in the engine room under extremely low external temperatures in polar regions, steam / hot oil / electric heaters are usually installed on the main ventilation ducts to heat the extremely low-temperature air entering the cabin from the outside environment, thereby maintaining the temperature inside the engine room at 5°C or above.

[0004] However, installing steam / hot oil / electric heaters or other equipment on the ventilation ducts as a heating source for engine room ventilation requires additional energy supply to function properly. This significantly increases the ship's energy consumption when regulating the temperature inside the engine room, leading to increased ship operating costs. Summary of the Invention

[0005] The purpose of this invention is to provide a ship waste heat recovery ventilation system and a ship that consumes less energy and has low ship operating costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, a ship waste heat recovery ventilation system is provided, the ship waste heat recovery ventilation system comprising:

[0008] A fresh air system is used to introduce fresh air from the outside environment into the cabin.

[0009] The waste heat recovery system includes an exhaust gas air heater and an exhaust gas boiler. The exhaust gas air heater has independent heating channels and heat exchange channels. The air inlet of the heating channel is connected to the flue gas outlet of the exhaust gas boiler, and the air outlet of the heating channel is connected to the external environment. The air inlet of the heat exchange channel is connected to the interior of the ship's cabin, and the air outlet of the heat exchange channel can be selectively connected to the fresh air system or to the external environment.

[0010] Optionally, the waste heat recovery system further includes a ventilation chamber, a circulating damper, and ventilation louvers. The air outlet of the heat exchange channel is connected to the ventilation chamber. The circulating damper is used to control the connection between the ventilation chamber and the fresh air system, and the ventilation louvers are used to control the connection between the ventilation chamber and the external environment.

[0011] Optionally, the waste heat recovery system further includes an exhaust pipe. The waste gas air heater includes a heater body, a first docking flange, and a second docking flange. The heating channel and the heat exchange channel are both located within the heater body. The first docking flange is located at the air inlet end of the heating channel and is connected to the flue gas outlet of the waste gas boiler. The second docking flange is located at the air outlet end of the heating channel and is connected to the exhaust pipe. The exhaust pipe is used to connect the external environment and the air outlet end of the heating channel.

[0012] Optionally, the heater body is provided with a plurality of spaced-apart heat exchange channels.

[0013] Optionally, the waste heat recovery system further includes a flexible duct, one end of which is connected to the ventilation chamber, and the other end of which is connected to the outlet of the heat exchange channel.

[0014] Optionally, the ship's waste heat recovery ventilation system includes multiple independent fresh air systems, and the outlet of the heat exchange channel can be selectively connected to the external environment or the adjacent fresh air system.

[0015] Optionally, the fresh air system includes fresh air louvers, a nacelle fan, a nacelle air supply duct, and exhaust louvers. The fresh air louvers and the exhaust louvers are both installed on the hull and are used to connect the interior of the nacelle with the external environment. The nacelle fan is located at the entrance of the nacelle air supply duct and is used to introduce fresh air entering through the fresh air louvers into the nacelle air supply duct. The nacelle air supply duct is used to introduce the fresh air into the interior of the nacelle.

[0016] Optionally, the fresh air system may also include multiple independently controlled fresh air louvers.

[0017] Optionally, the fresh air system may also include multiple independently controlled exhaust louvers.

[0018] On the other hand, a vessel is provided that includes a waste heat recovery ventilation system as described in any of the preceding claims.

[0019] The beneficial effects of this invention are:

[0020] This invention provides a waste heat recovery ventilation system for ships. By setting up an exhaust air heater with independent heating and heat exchange channels, and connecting the heating channel to the flue gas outlet of the exhaust boiler, the exhaust air heater can maximize the use of the waste heat generated by the combustion exhaust gas to heat the air in the heat exchange channel connected to the ship's interior. The heated air is then returned to the ship's interior through a fresh air system to achieve a circulating heating effect. Furthermore, there is no need to install additional energy-consuming air heating devices (such as steam / hot oil / electric heaters), thus achieving high energy utilization efficiency and reducing energy consumption by eliminating the need for additional energy consumption.

[0021] The present invention also provides a ship that, by applying the above-mentioned ship waste heat recovery ventilation system, has lower energy consumption, thereby effectively reducing the cost of ship operation. Attached Figure Description

[0022] Figure 1 This is a front view of the ship waste heat recovery ventilation system provided by the present invention;

[0023] Figure 2 This is a side view of the ship waste heat recovery ventilation system provided by the present invention;

[0024] Figure 3 This is a front view of the exhaust air heater in the ship waste heat recovery ventilation system provided by the present invention;

[0025] Figure 4 This is a side view of the exhaust air heater in the ship waste heat recovery ventilation system provided by the present invention;

[0026] Figure 5 This is a diagram of the airflow path under normal conditions in the ship waste heat recovery ventilation system provided by the present invention;

[0027] Figure 6 This is a diagram showing the airflow path in the heated state of the ship waste heat recovery ventilation system provided by the present invention.

[0028] In the picture:

[0029] 1. Fresh air system; 11. Fresh air louvers; 12. Cabin fan; 13. Cabin air supply duct; 14. Exhaust louvers;

[0030] 2. Waste heat recovery system; 21. Waste gas air heater; 211. Heating channel; 212. Heat exchange channel; 213. First docking flange; 214. Second docking flange; 215. Heater body; 22. Flexible air duct; 23. Ventilation chamber; 24. Circulating air damper; 25. Ventilation louver; 26. Waste gas boiler; 27. Exhaust pipe. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0035] In polar regions, the ambient air temperature is generally low during winter (e.g., -40℃), while various mechanical equipment in the engine room of a ship needs to be in a suitable ambient temperature to work properly. Generally, the normal operating temperature of mechanical equipment is required to be above 5℃.

[0036] To ensure the normal operation of mechanical equipment in the engine room under extremely low external temperatures in polar regions, steam / hot oil / electric heaters are usually installed on the main ventilation ducts to heat the extremely low-temperature air entering the cabin from the outside environment, thereby maintaining the temperature inside the engine room at 5°C or above.

[0037] However, installing steam / hot oil / electric heaters or other equipment on the ventilation ducts as a heating source for engine room ventilation requires additional energy supply to function properly. This significantly increases the ship's energy consumption when regulating the temperature inside the engine room, leading to increased ship operating costs.

[0038] Therefore, in order to reduce energy consumption during ship operation and lower the cost of ship operation, this embodiment provides a ship waste heat recovery ventilation system.

[0039] like Figures 1 to 6 As shown, the ship's waste heat recovery ventilation system includes a fresh air system 1 and a waste heat recovery system 2. The fresh air system 1 is used to introduce fresh air from the outside environment into the cabin. The waste heat recovery system 2 includes an exhaust air heater 21 and an exhaust boiler 26. The exhaust air heater 21 is provided with an independent heating channel 211 and a heat exchange channel 212. The air inlet of the heating channel 211 is connected to the flue gas outlet of the exhaust boiler 26, and the air outlet of the heating channel 211 is connected to the outside environment. The air inlet of the heat exchange channel 212 is connected to the cabin interior, and the air outlet of the heat exchange channel 212 can be selectively connected to the fresh air system 1 or to the outside environment.

[0040] By configuring an exhaust air heater 21 with independent heating channels 211 and heat exchange channels 212, and connecting the heating channel 211 to the flue gas outlet of the exhaust boiler 26, the exhaust air heater 21 maximizes the use of waste heat generated from combustion exhaust gas to heat the air in the heat exchange channel 212, which is connected to the interior of the ship's cabin. The heated air is then returned to the cabin via the fresh air system 1 to achieve a circulating heating effect. This eliminates the need for additional energy-consuming air heating devices (such as steam / hot oil / electric heaters), resulting in high energy efficiency and reduced energy consumption. This ship waste heat recovery ventilation system can be used on various types of ships; in this embodiment, it is primarily applied to polar vessels.

[0041] Optionally, the waste heat recovery system 2 also includes a ventilation chamber 23, a circulating damper 24, and ventilation louvers 25. The air outlet of the heat exchange channel 212 is connected to the ventilation chamber 23. The circulating damper 24 is used to control the connection and disconnection between the ventilation chamber 23 and the fresh air system 1. The ventilation louvers 25 are used to control the connection and disconnection between the ventilation chamber 23 and the external environment.

[0042] By setting a circulating air damper 24 and an air louver 25 on the air exchange chamber 23, the flow direction of the heated gas in the heat exchange channel 212 is controlled, so as to achieve selective connection between the outlet of the heat exchange channel 212 and the external environment or the fresh air system 1.

[0043] In this embodiment, when heating is required inside the cabin, the ventilation louvers 25 are closed and the recirculation damper 24 is opened. This allows some of the engine room return air to be heated in the exhaust air heater 21, then enters the fresh air system 1 through the ventilation chamber 23 and the recirculation damper 24. The fresh air system 1 then supplies the air to various air supply points inside the engine room, thus achieving recirculation heating inside the engine room. When heating is not required inside the cabin, the ventilation louvers 25 are opened and the recirculation damper 24 is closed, allowing the heated air to be directly discharged into the outside environment.

[0044] Optionally, the waste heat recovery system 2 further includes an exhaust pipe 27. The waste gas air heater 21 includes a heater body 215, a first connecting flange 213, and a second connecting flange 214. The heating channel 211 and the heat exchange channel 212 are both located within the heater body 215. The first connecting flange 213 is located at the inlet end of the heating channel 211 and is connected to the flue gas outlet of the waste gas boiler 26. The second connecting flange 214 is located at the outlet end of the heating channel 211 and is connected to the exhaust pipe 27. The exhaust pipe 27 connects the external environment to the outlet end of the heating channel 211. By providing the first connecting flange 213 on the waste gas air heater 21, it is convenient to connect the heating channel 211 to the flue gas outlet of the waste gas boiler 26. By providing the second connecting flange 214 on the waste gas air heater 21, it is convenient to connect the heating channel 211 to the exhaust pipe 27.

[0045] Optionally, the heater body 215 is provided with a plurality of spaced-apart heat exchange channels 212. By providing a plurality of spaced-apart heat exchange channels 212 in the heater body 215, the contact area between the air flowing in the heat exchange channels 212 and the heating channels 211 is increased, thereby improving heating efficiency and heating effect. The number, size and shape of the heat exchange channels 212 can be designed according to the actual environment. In this embodiment, the heater body 215 is provided with six elongated heat exchange channels 212.

[0046] Optionally, the waste heat recovery system 2 also includes a flexible duct 22, one end of which is connected to the ventilation chamber 23, and the other end of which is connected to the outlet of the heat exchange channel 212. Connecting the ventilation chamber 23 and the outlet of the heat exchange channel 212 via the flexible duct 22 allows for bending and adjustment of the duct, facilitating the connection between the outlet of the heat exchange channel 212 and the ventilation chamber 23, and reducing the difficulty of the connection.

[0047] Optionally, the ship's waste heat recovery ventilation system includes multiple independent fresh air systems 1, and the outlet of the heat exchange channel 212 can be selectively connected to the external environment or an adjacent fresh air system 1. By setting up multiple independent fresh air systems 1, the air requirements for combustion and cooling inside the ship's cabin are guaranteed. The capacity and number of fresh air systems 1 can be calculated and determined according to the actual needs of the ship in tropical and winter operating conditions.

[0048] Specifically, the fresh air system 1 includes fresh air louvers 11, engine room fan 12, engine room air supply duct 13, and exhaust louvers 14. Both the fresh air louvers 11 and the exhaust louvers 14 are installed on the hull and are used to connect the interior of the cabin with the external environment. The engine room fan 12 is installed at the entrance of the engine room air supply duct 13 and is used to introduce the fresh air entering through the fresh air louvers 11 into the engine room air supply duct 13. The engine room air supply duct 13 is used to introduce fresh air into the interior of the cabin.

[0049] Optionally, the fresh air system 1 also includes multiple independently controlled fresh air louvers 11. By setting multiple independently controlled fresh air louvers 11, the airflow balance between the cabin interior and the external environment can be achieved by controlling the number of fresh air louvers 11 that are opened or closed.

[0050] The number and size of the aforementioned fresh air louvers 11 are determined based on the airflow distribution and should be adjusted accordingly based on actual ventilation and heat balance calculations. Referring to this embodiment, the fresh air system 1 connected to the outlet of the heat exchange channel 212 is equipped with two fresh air louvers 11. When the outside temperature is suitable, both fresh air louvers 11 are open. When the outside temperature is extremely low and heating of the cabin interior is required, one fresh air louver 11 is open while the other is closed, resulting in 50% of the airflow in the fresh air system 1 coming from the outside environment, and the remaining 50% coming from the engine room return air heated by the exhaust air heater 21.

[0051] Optionally, the fresh air system 1 also includes multiple independently controlled exhaust louvers 14. By setting multiple independently controlled exhaust louvers 14, the airflow balance between the cabin interior and the external environment can be achieved by controlling the number of exhaust louvers 14 that are opened or closed.

[0052] In this embodiment, a ship is also provided, which includes the aforementioned ship waste heat recovery ventilation system. By applying the aforementioned ship waste heat recovery ventilation system, the ship has lower energy consumption, thereby effectively reducing the cost of ship operation.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A shipboard waste heat recovery ventilation system, characterized in that, The ship's waste heat recovery ventilation system includes: Fresh air system (1), the fresh air system (1) is used to introduce fresh air from the outside environment into the cabin; Waste heat recovery system (2), the waste heat recovery system (2) includes waste gas air heater (21) and waste gas boiler (26), the waste gas air heater (21) is provided with independent heating flow channel (211) and heat exchange flow channel (212), the air inlet end of the heating flow channel (211) is connected to the flue gas outlet of the waste gas boiler (26), the air outlet end of the heating flow channel (211) is connected to the external environment, the air inlet end of the heat exchange flow channel (212) is connected to the interior of the cabin, and the air outlet end of the heat exchange flow channel (212) can be selectively connected to the fresh air system (1) or to the external environment; The waste heat recovery system (2) also includes a ventilation chamber (23), a circulating damper (24), and ventilation louvers (25). The outlet end of the heat exchange channel (212) is connected to the ventilation chamber (23). The circulating damper (24) is used to control the connection and disconnection between the ventilation chamber (23) and the fresh air system (1). The ventilation louvers (25) are used to control the connection and disconnection between the ventilation chamber (23) and the external environment.

2. The ship waste heat recovery ventilation system according to claim 1, characterized in that, The waste heat recovery system (2) also includes an exhaust pipe (27). The waste gas air heater (21) includes a heater body (215), a first docking flange (213), and a second docking flange (214). The heating channel (211) and the heat exchange channel (212) are both located inside the heater body (215). The first docking flange (213) is located at the air inlet of the heating channel (211) and is connected to the flue gas outlet of the waste gas boiler (26). The second docking flange (214) is located at the air outlet of the heating channel (211) and is connected to the exhaust pipe (27). The exhaust pipe (27) is used to connect the external environment and the air outlet of the heating channel (211).

3. The ship waste heat recovery ventilation system according to claim 2, characterized in that, The heater body (215) is provided with a plurality of spaced heat exchange channels (212).

4. The ship waste heat recovery ventilation system according to claim 1, characterized in that, The waste heat recovery system (2) also includes a flexible duct (22), one end of which is connected to the ventilation chamber (23), and the other end of which is connected to the outlet of the heat exchange channel (212).

5. The ship waste heat recovery ventilation system according to claim 1, characterized in that, The ship's waste heat recovery ventilation system includes multiple independent fresh air systems (1), and the outlet of the heat exchange channel (212) can be selectively connected to the external environment or the fresh air system (1) adjacent to it.

6. The ship waste heat recovery ventilation system according to claim 1, characterized in that, The fresh air system (1) includes a fresh air louver (11), an engine room fan (12), an engine room air supply duct (13), and an exhaust louver (14). The fresh air louver (11) and the exhaust louver (14) are both located on the hull and are used to connect the interior of the cabin with the external environment. The engine room fan (12) is located at the entrance of the engine room air supply duct (13) and is used to introduce the fresh air entering through the fresh air louver (11) into the engine room air supply duct (13). The engine room air supply duct (13) is used to introduce the fresh air into the interior of the cabin.

7. The ship waste heat recovery ventilation system according to claim 6, characterized in that, The fresh air system (1) also includes multiple independently controlled fresh air louvers (11).

8. The ship waste heat recovery ventilation system according to claim 6, characterized in that, The fresh air system (1) also includes multiple independently controlled exhaust louvers (14).

9. A ship, characterized in that, The vessel includes a waste heat recovery ventilation system as described in any one of claims 1-8.

Images