Leaked ammonia fuel collecting and treating device

Abstract

The invention discloses a leaked ammonia fuel collecting and treating device. The device comprises a main container used for collecting and treating leaked liquid; the main container is arranged between a liquid tank bottom plate and a ship body inner bottom plate and communicated with a leakage channel at the bottom of the liquid tank bottom plate. A leaked liquid collecting area is arranged at the bottom in the main container, and a water absorbing assembly used for absorbing gas, a gas guiding assembly used for guiding the gas in leaked liquid into the water absorbing assembly and a solid absorbing assembly used for absorbing the gas which is not absorbed by the water absorbing assembly are arranged above the leaked liquid collecting area. The device has good heat preservation and automation performance, leakproofness and safety, and leaked liquid ammonia can be fully treated and absorbed after being heated and gasified by the heating device. The detachable design facilitates maintenance and replacement.

Description

Technical Field

[0001] The invention relates to a leakage collection and treatment device for ammonia fuel, belonging to the technical field of marine cryogenic liquid tanks. Background Art

[0002] Ammonia (NH3) is a nitrogen-hydrogen compound. The products of complete combustion are nitrogen and water, which is beneficial to environmental protection and the mitigation of the "greenhouse effect". Ammonia liquefies at normal pressure and -33°C and is usually transported by sea in the form of liquid ammonia. However, ammonia is volatile at room temperature. Ammonia has moderate toxicity and corrosiveness, and is easily explosive when mixed with air and exposed to open flames. If it leaks during transportation and effective measures are not taken in time, serious consequences are likely to occur.

[0003] According to IGC requirements, Type B independent cargo tanks need to be equipped with partial secondary barriers to prevent low-temperature leaked liquid from directly contacting the main hull and causing low-temperature brittle damage, and the partial secondary barriers can accommodate or handle at least 15 days of leakage. Generally, several leakage collection and treatment devices are arranged at the bottom of the tank as partial secondary barriers to meet the requirements of the regulations.

[0004] Chinese patent CN112278613A discloses a cryogenic liquid cargo leakage protection device for an independent liquid tank, comprising a liquid collecting part fixed on the side of the liquid tank and a liquid holding part fixed on the side of the hull, wherein the liquid collecting part and the liquid holding part are spaced apart and arranged correspondingly up and down; the liquid collecting part is provided with a liquid outlet, and the liquid holding part is provided with a liquid inlet, and the liquid outlet and the liquid inlet are arranged correspondingly up and down. In the above leakage protection device, on the one hand, the liquid collecting panel and the liquid holding panel are not covered by insulation, which increases the scope of cold leakage on the surface of the cryogenic liquid tank; on the other hand, there is a large gap near the liquid outlet and the liquid inlet, and volatile substances such as ammonia are easily diffused to the outside to cause harm; in addition, the structure of the liquid holding part is welded and fixed to the side of the hull, which is not conducive to the disassembly and maintenance of the device. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an ammonia fuel leakage collection and treatment device to solve or improve the insulation problem, the tightness and safety problem, and the disassembly and maintenance problem.

[0006] In order to solve the above technical problems, the present invention provides an ammonia fuel leakage collection and treatment device, which includes a main container for collecting and treating leaked liquid; the main container is arranged between the bottom plate of the liquid tank and the inner bottom plate of the hull, and is connected to the leakage channel at the bottom of the bottom plate of the liquid tank; a leakage liquid collection area is provided at the bottom of the main container, and a water absorption component for absorbing gas, a gas guide component for introducing gas in the leaked liquid into the water absorption component, and a solid adsorption component for absorbing gas not absorbed by the water absorption component are provided above the leakage liquid collection area.

[0007] Preferably, a liquid tank insulation is provided at the bottom of the liquid tank bottom plate, and the leakage channel is provided between the liquid tank bottom plate and the liquid tank insulation and passes through the liquid tank insulation, and is connected with the leakage liquid collection area of ​​the main container through a guide pipe, and the guide pipe is fixed by a guide pipe joint.

[0008] More preferably, the water absorption component includes a sink bottom plate located above the leaked liquid collection area, the sink bottom plate is provided with a hollow, the edge of the hollow is provided with a sink enclosure, and the guide pipe is penetrated in the sink enclosure.

[0009] Furthermore, the water tank enclosure is provided with a cavity surrounded by at least one partition, and the cavity is filled with anti-backflow liquid. The air guide component includes an air guide pipe and a gas diaphragm arranged between the water tank enclosure and the air guide pipe. One end of the air guide pipe is passed under the gas diaphragm, and the other end is arranged in the anti-backflow liquid.

[0010] Furthermore, the anti-backflow liquid is made of carbon tetrachloride; and the material of the gas diaphragm is chloroprene rubber.

[0011] More preferably, the solid adsorption component is arranged above the main container, and includes a solid adsorbent arranged in a mesh container, the outer wall of the mesh container is provided with a hook, and the inner wall of the main container is provided with a hanging groove matching the hook.

[0012] Furthermore, the solid adsorbent is activated carbon.

[0013] Preferably, a heating assembly is provided at the bottom of the main container, which includes a temperature sensor and a plurality of heating tubes.

[0014] Preferably, the main container is a cavity structure composed of a main container bottom plate, a main container side wall, and a main container cover plate. A side wall panel parallel to the main container cover plate is provided on the top of the main container side wall, and the side wall panel is connected to the main container cover plate through cover plate bolts; a water injection pipe is passed through the main container side wall.

[0015] Preferably, the main container is fixed to the inner bottom plate of the hull through a laminated wood assembly and a bracket assembly; the laminated wood assembly includes laminated wood, which is arranged between the main container support plate and the leg upper pad, the main container support plate is connected to the outer wall of the main container, and an upper limit plate is provided below the main container support plate, and a lower limit plate is provided above the leg upper pad; the bracket assembly includes a leg panel, a leg, and a leg lower pad from top to bottom, the leg panel is connected to the leg upper pad through the leg upper pad bolts, and the leg lower pad is connected to the inner bottom plate of the hull through the leg lower pad bolts.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The collection and treatment device has good insulation and automation performance. The water injection pipe and heating pipe are automatically controlled by the temperature sensor to maintain the water volume in the water tank and the temperature of the container.

[0018] (2) The collection and treatment device has good airtightness and safety, and the leaked liquid ammonia can be fully processed and absorbed after being heated and vaporized by the heating device.

[0019] (3) Multiple components of the collection and processing device are designed to be detachable, which is convenient for maintenance and replacement.

[0020] (4) The collecting device is simple in structure and easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of a leakage collection and treatment device for ammonia fuel provided by the present invention;

[0022] Figure 2 A top view of the main container cover;

[0023] Figure 3 is a top view of the side wall panel;

[0024] Figure 4 A top view of the main container support plate;

[0025] Figure 5 It is a top view of the pad on the leg;

[0026] Figure 6 It is a top view of the leg panel;

[0027] Figure 7 It is a top view of the sink bottom plate;

[0028] Figure 8 A bottom view of the main container bottom plate;

[0029] Fig. 9 Schematic diagram of the gas diaphragm. DETAILED DESCRIPTION

[0030] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0031] Example

[0032] like Figure 1-9 As shown, a leakage collection and treatment device for ammonia fuel provided by the present invention comprises a main container for collecting and treating leaked liquid; the main container is arranged between the liquid tank bottom plate 1 and the hull inner bottom plate 15, and is connected with the leakage channel 2 at the bottom of the liquid tank bottom plate 1 (the leakage channel 2 allows the leaked liquid (liquid ammonia) to flow freely); a leakage liquid collection area is arranged at the bottom of the main container, and a water absorption component for absorbing gas, a gas guide component for guiding the gas in the leaked liquid into the water absorption component, and a solid absorption component for absorbing the gas not absorbed by the water absorption component are arranged above the leakage liquid collection area.

[0033] A liquid tank insulation 3 is provided at the bottom of the liquid tank bottom plate 1, and the leakage channel 2 is provided between the liquid tank bottom plate 1 and the liquid tank insulation 3 and passes through the liquid tank insulation 3, and is connected with the leakage liquid collection area of ​​the main container through the guide pipe 5, and the guide pipe 5 is fixed by the guide pipe joint 4.

[0034] The water absorption component includes a water tank bottom plate 101 located above the leaked liquid collection area. The water tank bottom plate 101 is provided with a hollow, and a water tank enclosure 102 is provided at the edge of the hollow. The guide pipe 5 is inserted into the water tank enclosure 102.

[0035] The water tank enclosure 102 is provided with a cavity surrounded by at least one partition 103, and the cavity is filled with an anti-backflow liquid 105. The gas guide assembly includes a gas guide pipe 92 and a gas diaphragm 91 provided between the water tank enclosure 102 and the flow guide pipe 5. One end of the gas guide pipe 92 is passed through the bottom of the gas diaphragm 91, and the other end is provided in the anti-backflow liquid 105. The anti-backflow liquid 105 is made of carbon tetrachloride; the material of the gas diaphragm 91 is chloroprene rubber.

[0036] The solid adsorption assembly is arranged at the top of the main container, and includes a solid adsorbent 113 arranged in a mesh container 112. The outer wall of the mesh container 112 is provided with a hook, and the inner wall of the main container is provided with a hanging groove 111 that matches the hook. The solid adsorbent is activated carbon.

[0037] A heating assembly is provided at the bottom of the main container, which includes a temperature sensor 71 and a plurality of heating tubes 72 .

[0038] The main container is a cavity structure composed of a main container bottom plate 65, a main container side wall 63, and a main container cover plate 61. A side wall panel 64 parallel to the main container cover plate 61 is provided on the top of the main container side wall 63. The side wall panel 64 is connected to the main container cover plate 61 through a cover plate bolt 62. The main container side wall 63 and the main container bottom plate 65 are connected by welding, and the water tank bottom plate 101 and the main container side wall 63 are also connected by welding. A water injection pipe 8 is penetrated through the main container side wall 63. A certain gap is left at the connection between the guide pipe 5 and the main container cover plate 61, the water absorption component and the solid adsorption component, so that the guide pipe 5 can just freely pass through and extend to the bottom of the main container.

[0039] The main container is fixed to the inner bottom plate 15 of the hull through a laminated wood assembly and a bracket assembly; the laminated wood assembly includes laminated wood 131, which is arranged between the main container support plate 12 and the leg upper pad 143, the main container support plate 12 is connected to the outer wall of the main container by welding, and an upper limit plate 132 is arranged below the main container support plate 12, and a lower limit plate 133 is arranged above the leg upper pad 143; the bracket assembly includes a leg panel 142, a leg 141, and a leg lower pad 145 from top to bottom, and there are eight legs 141 in total. The legs 141 located at the four top corners can be made of equilateral angle steel, and the legs 141 located at the four middle positions can be made of flat steel. The leg panel 142 is connected to the leg upper pad 143 through the leg upper pad bolt 144, and the leg lower pad 145 is connected to the inner bottom plate 15 of the hull through the leg lower pad bolt 146. The remaining components of the bracket assembly are connected by welding.

[0040] The main container support plate 12, the main container and its internal steel components are all made of low temperature resistant steel. The bracket assembly is less affected by low temperature and can be made of ordinary marine steel.

[0041] The leaked low-temperature liquid (liquid ammonia) drips onto the bottom plate 65 of the main container through the flow guide pipe 5. After the temperature sensor 71 captures the low-temperature signal, it automatically controls the water injection pipe 8 to start injecting water into the water tank in the water absorption component to a certain amount. At the same time, the heating pipe 72 starts to heat up, so that the bottom plate 65 of the main container is maintained at a certain temperature (such as 5°C), so that the dripping liquid ammonia volatilizes into ammonia gas (NH3). The ammonia gas diffuses upward to the gas guide component, is injected into the anti-backflow liquid 105 (such as carbon tetrachloride) through the gas guide pipe 92, and then enters the water 104 and is absorbed by the water 104. A small amount of ammonia gas that is not absorbed continues to diffuse upward to the solid adsorption component and is fully absorbed by the solid adsorbent 113 (such as activated carbon).

Claims

1. A leakage collection and treatment device for ammonia fuel, characterized in that: Includes primary containers for collecting and disposing of leaked liquids; The main container is arranged between the liquid tank bottom plate (1) and the hull inner bottom plate (15), and is communicated with the leakage channel (2) at the bottom of the liquid tank bottom plate (1); a leakage liquid collection area is arranged at the bottom of the main container, and a water absorption component for absorbing gas, a gas guide component for guiding gas in the leaking liquid into the water absorption component, and a solid absorption component for absorbing gas not absorbed by the water absorption component are arranged above the leakage liquid collection area.

2. The leakage collection and treatment device of ammonia fuel according to claim 1, characterized in that: A liquid tank insulation (3) is provided at the bottom of the liquid tank bottom plate (1); the leakage channel (2) is provided between the liquid tank bottom plate (1) and the liquid tank insulation (3) and passes through the liquid tank insulation (3) to be connected to the leakage liquid collection area of ​​the main container through a flow guide pipe (5); the flow guide pipe (5) is fixed by a flow guide pipe joint (4).

3. The leakage collection and treatment device of ammonia fuel according to claim 2, characterized in that: The water absorption assembly comprises a water tank bottom plate (101) located above the leaked liquid collection area, the water tank bottom plate (101) is provided with a hollow, the edge of the hollow is provided with a water tank enclosure (102), and the guide pipe (5) is inserted into the water tank enclosure (102).

4. The leakage collection and treatment device of ammonia fuel according to claim 3, characterized in that: The water tank enclosure (102) is provided with a cavity surrounded by at least one partition (103), and the cavity is filled with an anti-backflow liquid (105). The air guide component comprises an air guide pipe (92) and a gas diaphragm (91) arranged between the water tank enclosure (102) and the flow guide pipe (5), one end of the air guide pipe (92) is passed through the bottom of the gas diaphragm (91), and the other end is arranged in the anti-backflow liquid (105).

5. The leakage collection and treatment device of ammonia fuel according to claim 4, characterized in that: The anti-backflow liquid (105) is made of carbon tetrachloride; the material of the gas diaphragm (91) is chloroprene rubber.

6. The leakage collection and treatment device of ammonia fuel according to claim 2, characterized in that: The solid adsorption component is arranged at the top of the main container, and comprises a solid adsorbent (113) arranged in a mesh container (112). The outer wall of the mesh container (112) is provided with a hook, and the inner wall of the main container is provided with a hanging groove (111) matched with the hook.

7. The leakage collection and treatment device of ammonia fuel according to claim 6, characterized in that: The solid adsorbent is activated carbon.

8. The leakage collection and treatment device of ammonia fuel according to claim 1, characterized in that: A heating component is provided at the bottom of the main container, which comprises a temperature sensor (71) and a plurality of heating tubes (72).

9. The leakage collection and treatment device of ammonia fuel according to claim 1, characterized in that: The main container is a cavity structure consisting of a main container bottom plate (65), a main container side wall (63), and a main container cover plate (61); a side wall panel (64) parallel to the main container cover plate (61) is provided on the top of the main container side wall (63); the side wall panel (64) is connected to the main container cover plate (61) via cover plate bolts (62); and a water injection pipe (8) is passed through the main container side wall (63).

10. The leakage collection and treatment device of ammonia fuel according to claim 1, characterized in that: The main container is fixed to the hull bottom plate (15) through a laminated wood assembly and a bracket assembly; the laminated wood assembly comprises laminated wood (131), the laminated wood (131) is arranged between the main container support plate (12) and the leg upper pad (143), the main container support plate (12) is connected to the outer wall of the main container, and an upper limit plate (132) is arranged below the main container support plate (12), and a lower limit plate (133) is arranged above the leg upper pad (143); the bracket assembly comprises a leg panel (142), a leg (141), and a leg lower pad (145) from top to bottom, the leg panel (142) is connected to the leg upper pad (143) through a leg upper pad bolt (144), and the leg lower pad (145) is connected to the hull bottom plate (15) through a leg lower pad bolt (146).

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