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Nitrogen gas supply equipment for bulk carrier

A technology for supplying equipment and bulk carriers, which is applied to bulk cargo, fire rescue, etc., and can solve problems such as hydrogen explosions, ship accidents, and limited berthing ports, and achieve suppression of construction costs, fewer design changes and modifications, and suppression Effects of Construction Costs and Retrofit Costs

Inactive Publication Date: 2017-02-22
ASAHI SHIPPING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, Patent Document 1 does not describe how to supply nitrogen to a bulk carrier. Conventionally, when carrying highly dangerous cargo in the cargo holds of various ships, nitrogen is purged from facilities on land to the piping for nitrogen supply. For nitrogen gas, a tank filled with nitrogen gas is loaded in advance during the voyage, and nitrogen is replenished from the tank into the cargo hold, and nitrogen gas is replenished from a land-based facility or the tank is replaced during berthing.
[0005] Therefore, there are problems in ports that do not have facilities for supplying nitrogen gas, such as the inability to carry out loading operations, and limited number of ports for berthing.
[0007] As a background for establishing such rules, the following cases can be cited: in places where DRI(C) or DRI(B) easily reacts with moisture to generate hydrogen, when 4% or more of the total volume of hydrogen gas is accumulated in the cargo hold Cause hydrogen explosion; and, very easily become porous structure due to reaction of moisture and oxygen, leading to auto-oxidation reaction until spontaneous fire; ship accident in DRI transport in 2003 and mid-2004

Method used

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  • Nitrogen gas supply equipment for bulk carrier
  • Nitrogen gas supply equipment for bulk carrier
  • Nitrogen gas supply equipment for bulk carrier

Examples

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Embodiment 1

[0037] figure 1 It is a figure which shows the outline|summary of Embodiment 1 of this invention, and the bulk carrier 1 has several cargo holds 2 for loading bulk cargo. These several cargo holds 2 are arrange|positioned side by side with the bulkhead 3 interposed between them in the ship's length direction, and 2 - several cargo holds 2 are arrange|positioned with the bulkhead (not shown) in the ship width direction similarly.

[0038] A gas supply branch pipe 4 is provided on the upper part of each cargo compartment 2, and, although not shown in the figure, there is provided an input piping that can be connected to a loading and unloading piping on the land side, and a load that is discharged from the input piping is provided. input port.

[0039] And each gas supply branch pipe 4 is branched from the gas supply main pipe 5, and the carbon dioxide sent from the carbon dioxide supply equipment 6 or the nitrogen sent from the nitrogen generator 7 can be passed through the ga...

Embodiment 2

[0056] In Example 2, the nitrogen generator 7 using the so-called membrane separation method, such as the membrane unit 20 in Example 1, is replaced by one that absorbs nitrogen and oxygen in the air in a pressurized state, and utilizes the difference in the adsorption speed of the two. The nitrogen generator 23 of the so-called PSA system for separation is completely the same as that of the first embodiment in other configurations.

[0057] figure 2 It is a schematic diagram showing the structure of the nitrogen generating device 23 of Example 2, including: an air compressor 24, an air filter 25 (two in series), an activated carbon tank 26, a first valve 27, a second valve 28, a first Three valves 29, fourth valve 30, fifth valve 31, first adsorption tower 32, second adsorption tower 33, sixth valve 34, seventh valve 35, eighth valve 36, exhaust outlet pipe 37, muffler 38, The connecting pipe 39 , the product tank 40 , and the nitrogen gas outlet pipe 41 are connected to th...

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PUM

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Abstract

The present invention provides a nitrogen gas supply equipment for a bulk carrier with which it possible to: purge the interior of a cargo hold of a bulk carrier by nitrogen gas and safely transport ignitable cargo; purge the interior of the cargo hold by the nitrogen gas at a port that lacks a nitrogen gas supply facility; and replenish the nitrogen gas at sea or port without using a nitrogen gas tank. The nitrogen gas supply equipment for a bulk carrier according to the present invention is characterized in that a bulk carrier (1), provided with gas supply pipes (4, 5) for supplying carbon dioxide, is provided with a nitrogen gas generation device (7), a nitrogen gas supply pipe (13) for connecting the nitrogen gas generation device (7) and the gas supply main pipe (5), and a nitrogen gas control valve (14) for controlling the amount of nitrogen gas supplied from the nitrogen gas generation device (7) to the gas supply pipes (4, 5).

Description

technical field [0001] The present invention relates to a nitrogen gas supply device for a bulk carrier, which is used for purging nitrogen into the cargo hold in the International Maritime Solid Bulk Cargoes Code (International Maritime Solid Bulk Cargoes Code, hereinafter referred to as "IMSBC Code"), so that the bulk carrier It is capable of loading Direct Reduced Iron (hereinafter referred to as "DRI") and other chemically dangerous goods that may present dangerous conditions on board and other goods that require inert gas. Background technique [0002] Oil tankers and chemical tankers are obliged to have fire extinguishing equipment that uses fire extinguishing gases such as carbon dioxide or explosion-proof equipment that uses inert gases such as nitrogen. [0003] Also, even bulk carriers may be equipped with fire extinguishing equipment that uses fire extinguishing gases such as carbon dioxide, and Patent Document 1 (JP-A-2011-116159) describes that nitrogen gas can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B25/04
CPCB63B25/04A62C3/10
Inventor 荒平一也
Owner ASAHI SHIPPING
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