A leak collection and treatment device for ammonia fuel

Abstract

The application discloses a kind of ammonia fuel leak collection and processing device, it includes to collect and process leaked liquid main container;Main container is located between liquid tank bottom plate and ship inner bottom plate, and is communicated with the leakage passage of the bottom of liquid tank bottom plate;The inner bottom of main container is provided with a leaked liquid collection area, and a water absorption assembly for absorbing gas is provided above the leaked liquid collection area, a gas guide assembly for guiding the gas in the leaked liquid into the water absorption assembly, and a solid adsorption assembly for adsorbing the gas not absorbed by the water absorption assembly.The application has good heat preservation and automation performance, as well as airtightness and safety, and the 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 application relates to an ammonia fuel leakage collection and treatment device and belongs to the technical field of a marine low-temperature liquid tank. BACKGROUND

[0002] Ammonia (NH3) is a nitrogen hydrogen compound, and the products obtained by complete combustion are nitrogen and water, which is beneficial to environmental protection and mitigation of the greenhouse effect. Ammonia is liquefied at normal pressure and -33 DEG C, and is usually transported at sea in the form of liquid ammonia. Ammonia is volatile at room temperature, and ammonia gas has moderate toxicity and corrosivity, and is easy to explode when mixed with air and exposed to fire. In the transportation process, once leakage occurs and effective measures are not taken in time, serious consequences are easy to occur.

[0003] According to the requirements of IGC, a B-type independent liquid cargo tank needs to be provided with partial secondary barriers to prevent low-temperature leaked liquid from directly contacting the main hull to cause low-temperature brittle failure, and the partial secondary barriers can accommodate or treat at least 15 days of leakage amount of leaked cargo. Generally, a plurality of leakage collection and treatment devices are arranged at the bottom of the liquid tank as the partial secondary barriers to meet the requirements of the specification.

[0004] Chinese patent CN112278613A discloses a low-temperature liquid cargo leakage protection device of an independent liquid tank, which comprises a liquid collecting part fixed on the side of the liquid tank and a liquid containing part fixed on the side of the hull, and the liquid collecting part and the liquid containing part are arranged in correspondence with each other in space. The liquid collecting part is provided with a liquid outlet, and the liquid containing part is provided with a liquid inlet, and the liquid outlet and the liquid inlet are arranged in correspondence with each other. In the above-mentioned leakage protection device, on the one hand, the liquid collecting panel and the liquid containing panel are not covered by insulation, which increases the range of low-temperature liquid tank surface leakage; on the other hand, there is a large gap near the liquid outlet and the liquid inlet, and volatile substances such as ammonia gas are easy to diffuse to the outside to cause harm; in addition, the liquid containing part is connected by welding and is fixed on the side of the hull, which is not conducive to the disassembly and maintenance of the device. SUMMARY

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

[0006] In order to solve the above technical problems, the present application provides an ammonia fuel leakage collection and treatment device, which comprises a main container for collecting and treating leaked liquid; the main container is arranged between the liquid tank bottom plate and the inner bottom plate of the hull, and is in communication with the leakage passage at the bottom of the liquid tank bottom plate; a leaked liquid collection area is arranged at the bottom of the main container, a water absorption assembly for absorbing gas is arranged above the leaked liquid collection area, a gas guiding assembly for guiding the gas in the leaked liquid into the water absorption assembly is arranged above the water absorption assembly, and a solid adsorption assembly for adsorbing the gas not absorbed by the water absorption assembly is arranged above the water absorption assembly.

[0007] Preferably, the bottom of the tank bottom plate is provided with a tank insulation, the leakage passage is arranged between the tank bottom plate and the tank insulation and communicates with the leakage liquid collecting area of the main container through the flow guide pipe fixed by the flow guide pipe joint.

[0008] More preferably, the water absorption assembly comprises a water tank bottom plate arranged above the leakage liquid collecting area, the water tank bottom plate is provided with a hollowed-out portion, the edge of the hollowed-out portion is provided with a water tank baffle, and the flow guide pipe is arranged in the water tank baffle.

[0009] Further, the water tank baffle is provided with a cavity surrounded by at least one partition plate, the cavity is filled with anti-backflow liquid, and the gas guide assembly comprises a gas guide pipe and a gas separation membrane arranged between the water tank baffle and the flow guide pipe, one end of the gas guide pipe is arranged below the gas separation membrane, and the other end is arranged in the anti-backflow liquid.

[0010] Further, the anti-backflow liquid is carbon tetrachloride, and the material of the gas separation membrane is neoprene.

[0011] More preferably, the solid adsorption assembly is arranged above the main container and comprises solid adsorbents 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 hook groove matched with the hook.

[0012] Further, the solid adsorbents are activated carbon.

[0013] Preferably, the bottom of the main container is provided with a heating assembly comprising a temperature sensor and a plurality of heating pipes.

[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, the top of the main container side wall is provided with a side wall panel parallel to the main container cover plate, the side wall panel is connected with the main container cover plate through a cover plate bolt, and the main container side wall is provided with a water injection pipe.

[0015] Preferably, the main container is fixed to the inner bottom plate of the ship body through a laminated wood assembly and a support assembly, the laminated wood assembly comprises laminated wood arranged between a main container support plate and a support leg upper pad, the main container support plate is connected with the outer wall of the main container, and the lower portion of the main container support plate is provided with an upper limiting plate, and the upper portion of the support leg upper pad is provided with a lower limiting plate; the support assembly comprises a support leg panel, a support leg and a support leg lower pad from top to bottom, the support leg panel is connected with the support leg upper pad through a support leg upper pad bolt, and the support leg lower pad is connected with the inner bottom plate of the ship body through a support leg lower pad bolt.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] (1) The heat preservation and automation performance of the collection and treatment device is good, the water injection pipe and the heating pipe are automatically controlled by the temperature sensor to maintain the water quantity of the water tank and the temperature of the container.

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

[0019] (3) Many components of the collection and processing device are designed to be detachable, making maintenance and replacement convenient.

[0020] (4) The collection device is simple in structure and easy to manufacture. Attached Figure Description

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

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

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

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

[0025] Figure 5 This is a top view of the pad on the outrigger;

[0026] Figure 6 This is a top view of the outrigger panel;

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

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

[0029] Figure 9 This is a schematic diagram of a gas diaphragm. Detailed Implementation

[0030] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0031] Example

[0032] like Figures 1-9 As shown, this invention provides a device for collecting and treating leaked ammonia fuel, which includes a main container for collecting and treating leaked liquid; the main container is located between the bottom plate 1 of the liquid tank and the bottom plate 15 of the ship's interior, and is connected to a leak channel 2 at the bottom of the bottom plate 1 of the liquid tank (the leak channel 2 allows the leaked liquid (liquid ammonia) to flow freely); a leaked liquid collection area is provided at the bottom of the main container, and a water absorption component for absorbing gas, a gas guiding component for introducing gas in the leaked liquid into the water absorption component, and a solid adsorption component for adsorbing gas that has not been absorbed by the water absorption component are provided above the leaked liquid collection area.

[0033] The bottom of the tank bottom plate 1 is provided with a tank insulation 3, and the leakage passage 2 is arranged between the tank bottom plate 1 and the tank insulation 3 and communicates with the leakage liquid collecting area of the main container through the flow guide pipe 5 after passing through the tank insulation 3, and the flow guide pipe 5 is fixed through the flow guide pipe joint 4.

[0034] The water absorption assembly includes a water tank bottom plate 101 arranged above the leakage liquid collecting area, and the water tank bottom plate 101 is provided with a hollow portion, and the edge of the hollow portion is provided with a water tank surrounding plate 102, and the flow guide pipe 5 is arranged in the water tank surrounding plate 102.

[0035] The water tank surrounding plate 102 is provided with a cavity surrounded by at least one baffle 103, and the cavity is filled with anti-backflow liquid 105, and the gas guide assembly includes a gas guide pipe 92 and a gas separation membrane 91 arranged between the water tank surrounding plate 102 and the flow guide pipe 5, one end of the gas guide pipe 92 is arranged below the gas separation membrane 91, and the other end is arranged in the anti-backflow liquid 105. The anti-backflow liquid 105 is carbon tetrachloride; and the material of the gas separation membrane 91 is neoprene.

[0036] The solid adsorption assembly is arranged above the main container, and includes a solid adsorbent 113 arranged in a mesh container 112, and 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 hook groove 111 matched with the hook. The solid adsorbent is activated carbon.

[0037] The bottom of the main container is provided with a heating assembly, which includes a temperature sensor 71 and a plurality of heating pipes 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, and the top of the main container side wall 63 is provided with a side wall panel 64 parallel to the main container cover plate 61, and the side wall panel 64 is connected with the main container cover plate 61 through cover plate bolts 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. The main container side wall 63 is provided with a water injection pipe 8. The connection parts of the flow guide pipe 5, the main container cover plate 61, the water absorption assembly and the solid adsorption assembly are all left with a certain gap, so that the flow guide pipe 5 can just pass through freely and extend to the bottom of the main container.

[0039] The main container is fixed on the inner bottom plate 15 of the ship body through a laminated wood assembly and a support assembly; the laminated wood assembly comprises laminated wood 131 arranged between the main container support plate 12 and the upper leg pad 143, the main container support plate 12 is connected with the outer wall of the main container through welding, and the lower portion of the main container support plate 12 is provided with an upper limiting plate 132, and the upper portion of the upper leg pad 143 is provided with a lower limiting plate 133; the support assembly comprises, from top to bottom, a leg panel 142, a leg 141 and a lower leg pad 145, the leg 141 comprises eight legs, the legs 141 at the four top corners can be made of equal angle steel, and the legs 141 at the four middle positions can be made of flat steel. The leg panel 142 is connected with the upper leg pad 143 through upper leg pad bolts 144, and the lower leg pad 145 is connected with the inner bottom plate 15 of the ship body through lower leg pad bolts 146. The remaining components of the support assembly are connected through welding.

[0040] The main container support plate 12, the main container and the internal steel components thereof are made of low-temperature-resistant steel. The support assembly is less affected by low temperature, and ordinary ship steel can be selected.

[0041] The leaked low-temperature liquid (liquid ammonia) drops onto the main container bottom plate 65 through the flow guide pipe 5, after the temperature sensor 71 captures the low-temperature signal, the water injection pipe 8 automatically starts to inject water into the water tank in the water absorption assembly to a certain amount, and the heating pipe 72 starts to heat, so that the main container bottom plate 65 is kept at a certain temperature (such as 5℃), so that the dropped liquid ammonia is volatilized into ammonia gas (NH3). The ammonia gas diffuses upward to the gas guide assembly, 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 assembly and is fully absorbed by the solid adsorbent 113 (such as activated carbon).

Claims

1. A device for collecting and treating leaked ammonia fuel, characterized in that, The system includes a main container for collecting and treating leaked liquid; the main container is located between the bottom plate (1) of the liquid tank and the bottom plate (15) of the ship's interior, and is connected to the leakage channel (2) at the bottom of the bottom plate (1); a leaked liquid collection area is provided at the bottom of the main container, and a water absorption component for absorbing gas, a gas guiding component for guiding gas in the leaked liquid into the water absorption component, and a solid adsorption component for adsorbing gas not absorbed by the water absorption component are provided above the leaked liquid collection area; the water absorption component includes a water tank bottom plate (101) located above the leaked liquid collection area, the water tank bottom plate (101) has a hollow, the edge of the hollow is provided with a water tank enclosure plate (102), and a guide pipe (5) passes through the water tank enclosure plate (102); the water tank enclosure plate (102) is provided with a cavity formed by at least one partition plate (103), the cavity is filled with anti-backflow liquid (105), and the gas guiding component includes a gas guiding pipe (92) and a gas guiding component located on the water tank enclosure plate (102). A gas diaphragm (91) is connected to the guide tube (5). One end of the gas guide tube (92) passes under the gas diaphragm (91), and the other end is placed in the anti-backflow liquid (105). The solid adsorption assembly is located above the main container and includes a solid adsorbent (113) placed in a mesh container (112). The outer wall of the mesh container (112) is provided with hooks, and the inner wall of the main container is provided with a hanging groove (111) that cooperates with the hooks. The bottom of the main container is provided with a... The heating assembly includes a temperature sensor (71) and multiple heating tubes (72); 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). The top of the main container side wall (63) is provided with a side wall panel (64) parallel to the main container cover plate (61), and the side wall panel (64) is connected to the main container cover plate (61) by cover plate bolts (62); a water injection pipe (8) passes through the main container side wall (63). The leaked liquid ammonia drips onto the bottom plate (65) of the main container through the guide pipe (5). After the temperature sensor (71) detects 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. At the same time, the heating pipe (72) starts to heat up, keeping the bottom plate (65) of the main container at a constant temperature, so that the dripping liquid ammonia evaporates into ammonia gas. The ammonia gas diffuses upward to the gas guiding component, is injected into the anti-backflow liquid (105) through the gas guiding pipe (92), and then enters the water (104) and is absorbed by the water (104). A small amount of unabsorbed ammonia gas continues to diffuse upward to the solid adsorption component and is fully absorbed by the solid adsorbent (113).

2. The ammonia fuel leakage collection and treatment device as described in claim 1, characterized in that, The bottom of the liquid tank bottom plate (1) is provided with liquid tank insulation (3). The leakage channel (2) is located between the liquid tank bottom plate (1) and the liquid tank insulation (3) and passes through the liquid tank insulation (3). It is connected to the leakage liquid collection area of ​​the main container through the guide pipe (5). The guide pipe (5) is fixed through the guide pipe joint (4).

3. The ammonia fuel leakage collection and treatment device as described in claim 1, characterized in that, The anti-backflow liquid (105) is made of carbon tetrachloride; the gas diaphragm (91) is made of neoprene rubber.

4. The ammonia fuel leakage collection and treatment device as described in claim 1, characterized in that, The solid adsorbent is activated carbon.

5. The ammonia fuel leakage collection and treatment device as described in claim 1, characterized in that, The main container is fixed to the bottom plate (15) of the ship's interior by a laminated wood assembly and a support assembly. The laminated wood assembly includes laminated wood (131), which is located between the main container support plate (12) and the upper support plate (143) of the leg. The main container support plate (12) is connected to the outer wall of the main container, and an upper limiting plate (132) is provided below the main container support plate (12), and a lower limiting plate (133) is provided above the upper support plate (143). The support assembly includes, from top to bottom, a leg panel (142), a leg (141), and a lower support plate (145). The leg panel (142) is connected to the upper support plate (143) by a bolt (144) and the lower support plate (145) is connected to the bottom plate (15) of the ship's interior by a bolt (146).

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