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The steam pipeline of lng ship and the operation method of lng ship

A technology for LNG ships and steam, applied in steam engine installations, used for bulk cargo, lighting and heating equipment, etc., can solve the problems of expensive light oil and deterioration of shipping accounting.

Active Publication Date: 2015-12-02
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in recent years, from the viewpoint of environmental protection, the IMO restrictions on sulfur in marine fuels (especially heavy oil) have been strengthened, and the use of heavy oil will be restricted in the near future, and light oil with low sulfur content is also more competitive. Expensive and therefore potentially aggravating shipping accounting considerably

Method used

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  • The steam pipeline of lng ship and the operation method of lng ship
  • The steam pipeline of lng ship and the operation method of lng ship
  • The steam pipeline of lng ship and the operation method of lng ship

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Experimental program
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no. 1 approach 〕

[0034] Below, refer to figure 1 as well as figure 2 , the steam pipeline of the LNG carrier according to the first embodiment of the present invention will be described.

[0035] The steam line (hereinafter, referred to as "steam line") 1 of the LNG carrier according to the present embodiment includes a main steam pipe (steam pipe for main engine) 2 and a bypass steam pipe (bypass steam pipe) 3 .

[0036] The main steam pipe 2 is a pipe that guides the steam generated in the boiler 11 to the steam turbine 12 (for the main engine), and guides the steam that has completed work in the steam turbine 12 to the main condenser 13 .

[0037] The steam turbine 12 includes a high-pressure turbine 32 and a low-pressure turbine 33 that rotate a propeller 31 in a forward direction, and a reverse turbine 34 that rotates the propeller 31 in a backward direction. When the propeller 31 is rotated in the forward direction, the steam generated in the boiler 11 passes through the high-pressure...

no. 2 approach 〕

[0050] refer to image 3 A steam line according to a second embodiment of the present invention will be described.

[0051] exist image 3 As indicated by oblique lines in , in the steam pipeline of this embodiment, the load of the steam turbine 12 is 0% to 50%, specifically, the full speed forward, half speed forward, slow forward, slowest forward, When navigating at the slowest speed, slow speed, half speed, and full speed, the excess steam volume (the steam volume passing through the side steam pipe 3) is set to the excess steam volume described in the first embodiment. It differs from the above-mentioned 1st Embodiment in that the steam quantity of a part is (approximately) half.

[0052] According to the steam pipeline of the present embodiment and the operation method of the LNG ship of the present embodiment, when there is a load increase request to increase the load of the steam turbine 12, the flow control valve 46 is operated in the closing direction, so that the b...

no. 3 approach 〕

[0056] refer to Figure 4 A steam line according to a third embodiment of the present invention will be described.

[0057] Such as Figure 4 As shown, the steam line 51 of this embodiment differs from the content of the above-mentioned embodiment in that it includes a steam pipe 52 for a generator in addition to the main steam pipe 2 and the bypass steam pipe 3 .

[0058] In addition, the same code|symbol is attached|subjected to the same member as the said embodiment, and description about the said member is abbreviate|omitted here.

[0059] The generator steam pipe 52 is the main steam pipe 2 located between the boiler 11 and the steam turbine 12 , more specifically, the main steam pipe 43 located on the upstream side of the branch point 45 where the third steam pipe 43 branches from the first steam pipe 41 . The middle of the steam pipe 2 communicates with the middle of the fourth steam pipe 44 , and the steam generated in the boiler 11 is directly introduced into the pi...

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Abstract

The invention provides a steam pipe line of an LNG ship which can perform special burning of the natural gas in a boiler at a manipulation area. Under the condition that a value of a load of a steam turbine for a host is less than a specified value, the boiler always generates steam the quantity of which is more than the quantity of steam required by the steam turbine for the host.

Description

technical field [0001] The present invention relates to a steam pipeline of an LNG ship (liquefied natural gas carrier), which will be generated in a boiler that uses the liquefied natural gas stored in the LNG tank mounted on the LNG ship or the evaporated steam naturally produced by the LNG tank as fuel. The steam is directed towards the main condenser. Background technique [0002] As a steam line of an LNG ship that guides steam generated in a boiler fueled by liquefied natural gas stored in an LNG tank mounted on an LNG ship or evaporated steam naturally generated from an LNG tank to the main condenser, there are known, for example, patent documents 1 the disclosed structure. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2003-227608 [0006] Summary of the invention [0007] The problem to be solved by the invention [0008] Here, in the LNG ship disclosed in Patent Document 1, since the distance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K11/02
CPCB63B25/16F17C3/04F23K5/00
Inventor 中村龙太西山太郎
Owner MITSUBISHI HEAVY IND LTD