Ship ventilation mast system using ammonia fuel
By designing a breathable mast system for ammonia fuel ships, using spray absorption and detection to control ammonia concentration, the ammonia emission problem is solved, and the safety monitoring and capture of ammonia fuel ship breathable system is achieved, ensuring environmental and personnel safety .
Patent Information
- Application Number
- CN202420180837.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-01-24
AI Technical Summary
Ammonia fuel engines and ammonia fuel supply systems are difficult to avoid ammonia exhausted into the atmosphere when they are breathable, resulting in environmental and personnel safety threats. The existing breathable mast system cannot effectively capture and monitor ammonia.
A marine breathable mast system consisting of a breathable mast body, an internal spray assembly, a test piece, an external spray assembly and a nitrogen purge assembly were designed to control ammonia concentration through spray absorption and detection to ensure that ammonia is not discharged into the atmosphere. , and prevent the aqueous ammonia solution from freezing under low temperature environment.
It effectively reduces the concentration of ammonia discharged into the atmosphere, ensures the safety of personnel and environment, ensures the safe and reliable breathable system of ammonia-fueled ships, prevents ammonia and air from mixing freely, and avoids the risk of explosion.
Smart Images
Figure CN222361061U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ship power fuel processing, in particular to a ship ventilation mast system using ammonia fuel. Background Art
[0002] The development of ammonia fuel engines and ammonia fuel supply systems has attracted much attention in the shipbuilding and shipping industries. However, due to the toxicity of ammonia, ammonia should be avoided from being discharged into the atmosphere when ammonia fuel engines and ammonia fuel supply systems need to be vented, which poses new challenges to the design of ammonia fuel ship venting systems.
[0003] At present, for other low-carbon fuel ships, such as LNG, LPG, etc., the function of their ventilation masts is only to introduce the ventilation of various systems of the ship into the ventilation mast installed on the deck and extend it to a certain height, and then discharge it into the atmosphere; and the ventilation mast system that includes centralized capture of ammonia in the ventilation of each ammonia fuel system and simultaneously realizes normal ventilation of other gases has not yet been applied.
[0004] In order to optimize the ship design and comprehensively monitor and capture the ammonia permeability of the entire ship to prevent ammonia from being discharged into the air and protect personnel and the environment, the present application provides a ship ventilation mast system using ammonia fuel, providing a good solution for the application of ammonia fuel ships. Utility Model Content
[0005] The utility model aims to provide a ship ventilation mast system using ammonia fuel, which can effectively prevent ammonia from being discharged into the atmosphere.
[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is to provide a ship ventilation mast system using ammonia fuel, including a ventilation mast body, an internal spray assembly, a first detection member, a ventilation cap, an external spray assembly and a second detection member. The ventilation mast body is sealed at the bottom and open at the top. An air inlet for ammonia gas to enter is provided near the bottom side, and the air inlet is provided with a control valve; the internal spray assembly is provided near the open position inside the ventilation mast body, including an internal spray pipeline, and a plurality of internal nozzles are provided on the internal spray pipeline; the first detection member is used to detect the concentration of ammonia gas, and is provided on the ventilation mast body The inner side wall is located above the internal spray assembly; the air cap covers the open end of the air mast body, and the air cap is provided with a receiving port, and ammonia flows from the air mast body through the air cap and then flows out from the top; the external spray assembly is arranged above the receiving port, including an external spray pipeline, and the external spray pipeline is provided with a plurality of external nozzles, and the water dropped by the external nozzles is received by the receiving port, and the receiving port is communicated with the air mast body; the second detection component is arranged above the external spray assembly, and is used to detect the concentration of ammonia, and the second detection component is electrically connected to the control valve through a connecting line.
[0007] Furthermore, a drain port is provided at the bottom of the air-permeable mast body, and a drain valve is provided at the drain port.
[0008] Furthermore, a liquid level switch is provided on one side of the bottom of the air-permeable mast body, and the liquid level switch is electrically connected to the drain valve.
[0009] Furthermore, a heater and a temperature sensor are provided at the bottom of the air-permeable mast body. The temperature sensor feeds back the detected temperature to the controller, and the controller controls the heater to heat according to the temperature feedback.
[0010] Furthermore, it also includes a nitrogen purge component, which includes a nitrogen gas source and an air pump, one end of the air pump is connected to the air inlet, and the other end is connected to the nitrogen gas source.
[0011] Furthermore, the breathable cap includes a cap body and a cover plate, the bottom of the cap body is provided with a mounting opening, the top of the breathable mast body passes through the mounting opening and protrudes from the bottom of the body, the cover plate is provided on the top of the cap body, the cover plate is opposite to the opening of the breathable mast body and a space is left between the two, and the receiving interface is formed between the cover plate and the side wall of the body.
[0012] Furthermore, the cover plate is fixed to the side wall of the body via connecting ribs.
[0013] Furthermore, the air-permeable mast body is a closed structure from bottom to top.
[0014] Furthermore, a first heating element is provided on the internal spray pipeline, and a second heating element is provided on the external spray pipeline.
[0015] Furthermore, both the first detection element and the second detection element are ammonia sensors.
[0016] The beneficial effects of the utility model are:
[0017] 1. The control valve is opened, and ammonia enters the air-permeable mast body from the air inlet. Most of the ammonia is absorbed by the water sprayed by the internal spray assembly. After the internal spray assembly sprays and absorbs, the residual ammonia concentration in the gas is controlled below the set value A. It is checked by the first detection component and discharged from the air-permeable mast body. Then the external spray assembly sprays water to spray and absorb the ammonia fuel in the exhaust gas again to ensure that the final ammonia concentration discharged into the atmosphere is lower than the set value B. It is checked by the second detection component. The second detection component is electrically connected and associated with the control valve. When the ammonia concentration is higher than the set value B, the control valve automatically closes and seals the air inlet, stopping the ventilation of the ammonia fuel.
[0018] 2. A drain port is provided at the bottom of the vent mast body, and a drain valve is provided at the drain port. A liquid level switch is provided on one side of the bottom of the vent mast body, and the liquid level switch is electrically connected to the drain valve. When the liquid accumulation at the bottom of the vent mast exceeds the set value, the liquid level switch alarms and opens the drain valve to discharge and collect the ammonia solution at the bottom of the vent mast body.
[0019] 3. The temperature sensor promptly detects abnormal temperature changes such as liquid ammonia leaking into the vent mast, and is set to alarm when low temperature is detected. The heater is arranged at the bottom of the vent mast to prevent the solution from freezing in a low temperature environment, and the ammonia aqueous solution cannot be discharged and collected through the drain valve.
[0020] 4. The ship's ventilation mast system also includes a nitrogen purge component, which includes a nitrogen gas source and an air pump. One end of the air pump is connected to the air inlet, and the other end is connected to the nitrogen gas source. It has a nitrogen purge function to prevent ammonia fuel from mixing freely with air to form explosive gas; when personnel need to enter the ventilation mast for maintenance, they should first purge with nitrogen and then purge with air to ensure the safety of the personnel entering.
[0021] 5. A first heating element is provided on the internal spray pipeline, and a second heating element is provided on the external spray pipeline to prevent the water spray pipeline from freezing in a low temperature environment and being unable to spray water to absorb ammonia fuel. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A structural diagram of a ship ventilation mast system using ammonia fuel provided in an embodiment of the utility model.
[0024] Description of reference numerals:
[0025] 100. Ventilation mast body; 101. Internal nozzle; 102. First detection component; 103. External nozzle; 104. Second heating component; 105. Second detection component; 106. Connecting line; 107. External spray pipeline; 108. First heating component; 109. Internal spray pipeline; 110. Control valve; 111. Heater; 112. Drain valve; 113. Temperature sensor; 114. Liquid level switch; 115. Nitrogen gas source; 116. Air pump; 117. Cap body; 118. Cover plate; 119. Socket. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0030] Reference Figure 1The marine ventilating mast system using ammonia fuel provided by the embodiment of the utility model comprises a ventilating mast body 100, an internal spray assembly, a first detection member 102, a ventilating cap, an external spray assembly and a second detection member 105. The ventilating mast body 100 is sealed at the bottom and open at the top. An air inlet for ammonia gas to enter is provided near the bottom side, and a control valve 110 is provided at the air inlet. The internal spray assembly is provided near the open position inside the ventilating mast body 100, and comprises an internal spray pipeline 109, and a plurality of internal spray heads 101 are provided on the internal spray pipeline 109. The first detection member 102 is used to detect the concentration of ammonia gas and is provided inside the ventilating mast body 100. the side wall and is located above the internal spray assembly; the air cap covers the open end of the air-permeable mast body 100, and the air cap is provided with a receiving port 119, and ammonia flows from the air-permeable mast body 100 through the air cap and then flows out from the top; the external spray assembly is arranged above the receiving port 119, including an external spray pipeline 107, and the external spray pipeline 107 is provided with a plurality of external nozzles 103, and the water dropped by the external nozzles 103 is received by the receiving port 119, and the receiving port 119 is communicated with the air-permeable mast body 100; the second detection component 105 is arranged above the external spray assembly, and is used to detect the concentration of ammonia, and the second detection component 105 is electrically connected to the control valve 110 through the connecting line 106.
[0031] The control valve 110 is opened, and ammonia enters the air-permeable mast body 100 from the air inlet, and most of the ammonia is absorbed by the water sprayed by the internal spray assembly. After the internal spray assembly sprays and absorbs, the residual ammonia concentration in the gas is controlled below the set value A, and is checked by the first detection component 102 and discharged from the air-permeable mast body 100. When the first detection component 102 shows that the concentration exceeds the standard, it is necessary to increase the internal water injection flow or reduce the ammonia fuel permeation flow. Subsequently, the external spray assembly sprays water to spray and absorb the ammonia fuel in the exhaust gas again to ensure that the final ammonia concentration discharged into the atmosphere is lower than the set value B, which is checked by the second detection component 105. The second detection component 105 is electrically connected and associated with the control valve 110. When the ammonia concentration is higher than the set value B, the control valve 110 automatically closes and seals the air inlet, and stops the permeation of the ammonia fuel. Set value A = 300PPM, set value B = 150PPM. Among them. The first detection component 102 and the second detection component 105 both use ammonia sensors.
[0032] Furthermore, a drain port is provided at the bottom of the vent mast body 100, and a drain valve 112 is provided at the drain port. A liquid level switch 114 is provided on one side of the bottom of the vent mast body 100, and the liquid level switch 114 is electrically connected to the drain valve 112. When the liquid accumulation at the lower part of the vent mast exceeds the set value, the liquid level switch 114 alarms, and the drain valve 112 is opened to discharge and collect the ammonia solution at the bottom of the vent mast body 100.
[0033] Furthermore, a heater 111 and a temperature sensor 113 are provided at the bottom of the vent mast body 100. The temperature sensor 113 feeds back the detected temperature to the controller, and the controller controls the heater 111 to heat according to the temperature feedback. The temperature sensor 113 promptly detects abnormal temperature changes such as liquid ammonia leaking into the vent mast, and is set to alarm when a low temperature is detected. The heater 111 is arranged at the bottom of the vent mast body 100 to prevent the solution from freezing in a low temperature environment, and the ammonia aqueous solution cannot be discharged and collected through the drain valve 112.
[0034] Furthermore, the ship's ventilation mast system also includes a nitrogen purge assembly, which includes a nitrogen gas source 115 and an air pump 116, one end of the air pump 116 is connected to the air inlet, and the other end is connected to the nitrogen gas source 115. The nitrogen purge function prevents ammonia fuel from mixing freely with air to form explosive gas; when personnel need to enter the ventilation mast body 100 for maintenance, nitrogen purge is used first, and then air purge is used to ensure the safety of the personnel entering.
[0035] Furthermore, the breathable cap includes a cap body 117 and a cover plate 118. A mounting port is provided at the bottom of the cap body 117. The top of the breathable mast body 100 passes through the mounting port and protrudes from the bottom of the body. The cover plate 118 is provided at the top of the cap body 117. The cover plate 118 is opposite to the opening of the breathable mast body 100 with a space therebetween. A receiving interface 119 is formed between the cover plate 118 and the side wall of the body.
[0036] Specifically, the air-permeable mast body 100 is a closed structure from bottom to top. In this embodiment, the outer contour of the air-permeable mast body 100 is in the shape of a large cylinder at the bottom and a small cylinder at the top. The two are connected in transition, and the open end of the small cylindrical portion is plugged into the installation port. At this time, the bottom of the cap body 117 is clamped at the transition point. At this time, the bottom of the cap body 117 is sealed to prevent subsequent water leakage. The cover plate 118 is fixed to the side wall of the body through connecting ribs. At this time, the ammonia in the air-permeable mast body 100 passes through the position of the cover plate 118 after passing through the internal spray assembly, and then overflows from the gap between the cover plate 118 and the open end of the air-permeable mast body 100 and flows through the receiving interface 119, and finally the external spray assembly is sprayed. The sprayed aqueous solution is deposited at the bottom of the cap body 117. When the height of the aqueous solution is higher than the open top of the ventilating mast body 100, it flows from the gap between the cover plate 118 and the open part of the ventilating mast body 100 to the bottom of the ventilating mast body 100 for collection. At this time, part of the aqueous solution remains at the bottom of the cover plate 118, which can further adsorb ammonia.
[0037] Furthermore, a first heating element 108 is provided on the internal spray pipeline 109, and a second heating element 104 is provided on the external spray pipeline 107. This prevents the water spray pipeline from freezing in a low temperature environment, so that water cannot be sprayed to absorb ammonia fuel.
[0038] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A ship ventilation mast system using ammonia fuel, characterized in that: include: The air-permeable mast body (100) is sealed at the bottom and open at the top, and an air inlet for ammonia gas to enter is provided near one side of the bottom, and the air inlet is provided with a control valve (110); An internal spray assembly is arranged near an open position inside the air-permeable mast body (100), and comprises an internal spray pipeline (109), on which a plurality of internal spray heads (101) are arranged; A first detection element (102), used for detecting the concentration of ammonia, is disposed on the side wall inside the air-permeable mast body (100) and is located above the internal spray assembly; A vent cap is covered on the open end of the vent mast body (100), the vent cap is provided with a receiving port (119), and ammonia flows from the vent mast body (100) through the vent cap and then flows out from the top; An external spray assembly is arranged above the receiving port (119), comprising an external spray pipeline (107), wherein a plurality of external spray heads (103) are arranged on the external spray pipeline (107), and water dropped by the external spray heads (103) is received by the receiving port (119), and the receiving port (119) is connected to the air-permeable mast body (100); The second detection component (105) is arranged above the external spray assembly and is used to detect the concentration of ammonia. The second detection component (105) is electrically connected to the control valve (110) via a connecting line (106).
2. The marine ventilating mast system using ammonia fuel as claimed in claim 1, characterized in that: A liquid drain port is provided at the bottom of the air-permeable mast body (100), and a liquid drain valve (112) is provided at the liquid drain port.
3. The marine ventilation mast system using ammonia fuel as claimed in claim 2, characterized in that: A liquid level switch (114) is provided on one side of the bottom of the air-permeable mast body (100), and the liquid level switch (114) is electrically connected to the liquid drain valve (112).
4. The marine ventilating mast system using ammonia fuel as claimed in claim 1, characterized in that: A heater (111) and a temperature sensor (113) are provided at the bottom of the air-permeable mast body (100). The temperature sensor (113) feeds back the detected temperature to a controller, and the controller controls the heater (111) to heat according to the temperature feedback.
5. The ship ventilation mast system using ammonia fuel as claimed in claim 1, characterized in that: It also includes a nitrogen purge assembly, which includes a nitrogen gas source (115) and an air pump (116). One end of the air pump (116) is connected to the gas inlet, and the other end is connected to the nitrogen gas source (115).
6. The marine ventilating mast system using ammonia fuel as claimed in claim 1, characterized in that: The breathable cap comprises a cap body (117) and a cover plate (118), the bottom of the cap body (117) is provided with a mounting opening, the top of the breathable mast body (100) passes through the mounting opening and is protruded from the bottom of the body, the cover plate (118) is arranged on the top of the cap body (117), the cover plate (118) is directly opposite to the opening of the breathable mast body (100) and a space is left between the two, and the receiving interface (119) is formed between the cover plate (118) and the side wall of the body.
7. The marine ventilating mast system using ammonia fuel as claimed in claim 6, characterized in that: The cover plate (118) is fixed to the side wall of the body via connecting ribs.
8. The marine ventilating mast system using ammonia fuel as claimed in claim 6, characterized in that: The air-permeable mast body (100) is a closed structure from the bottom to the top.
9. The marine ventilating mast system using ammonia fuel as claimed in claim 1, characterized in that: The internal spray pipeline (109) is provided with a first heating element (108), and the external spray pipeline (107) is provided with a second heating element (104).
10. The marine ventilating mast system using ammonia fuel as claimed in claim 1, characterized in that: The first detection element (102) and the second detection element (105) are both ammonia sensors.