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Method for the uninterrupted operation of a gas liquefaction system

A technology of operation method and equipment, applied in the field of gas liquefaction equipment, to achieve the effect of reducing the possibility

Inactive Publication Date: 2010-07-21
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage of this approach is that the LNG production process has now collapsed and lasted several hours until the involved coolant compressors are restarted and thermally stabilized

Method used

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  • Method for the uninterrupted operation of a gas liquefaction system
  • Method for the uninterrupted operation of a gas liquefaction system
  • Method for the uninterrupted operation of a gas liquefaction system

Examples

Experimental program
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Embodiment Construction

[0034] figure 1 An integrated scheme of the gas liquefaction plant 1 is shown, including an independent power plant 23 as the power generation part 2 , a power transmission part 3 for distributing electric energy, and a coolant compressor part 4 . The regulator 5 is connected to the power generation part 2 , the power transmission part 3 and the coolant compressor part 4 .

[0035]The power generation part 2 comprises three turbine units 6 , each having a turbine 10 and a generator 12 , which are connected via a shaft 11 . However, the power generation section 2 can also comprise fewer than three or more than three turbine sets 6 .

[0036] The turbine units 6 are each connected via a power transformer 13 to a power plant busbar 15 of the power transmission part 3 , which supplies electrical energy to the electric motors in the coolant compressor part 4 and / or other consumers 26 .

[0037] In the coolant compressor section 4 , the rotational speed variable motor 8 of the coo...

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Abstract

The invention relates to a method for the uninterrupted operation of a gas liquefaction system (1), wherein the operation is continuously monitored for at least those users of the refrigerant compressor component (4) which represent a two-digit percentage of the total load on the refrigerant compressor component (4). A total instantaneously available negative load reserve is calculated, and at least one predetermined turbine (10) is switched off when the load reserve reachable via a frequency regulation of the one or more refrigerant compressors (7) is lower than the energy demand of the largest of the refrigerant compressors (7) and either a refrigerant compressor (7) fails or a speed of frequency change (df / dt) for the power supply network for the gas liquefaction system (1) exceeds a preset threshold (121).

Description

technical field [0001] The invention relates to a method for uninterrupted operation of gas liquefaction equipment, especially natural gas liquefaction equipment. Background technique [0002] Natural gas liquefied by cooling is called liquefied natural gas (English liquefied natural gas, referred to as LNG). At atmospheric pressure, LNG is less than 1 / 600 stel of the volume of natural gas and is therefore particularly suitable for transportation and storage purposes; it cannot be used as a fuel in this aggregated state. [0003] A power plant connected upstream of a plant for the liquefaction of light hydrocarbons, such as natural gas, usually uses a gas-fired gas turbine and optionally a steam turbine, and generates the electrical energy required for the operation of the electric motor by means of an engaged generator. [0004] In a conventional natural gas liquefaction plant, the turbocompressor that circulates the coolant is driven by a directly coupled gas turbine. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02F01D15/00F04D25/04H02P9/00
CPCF25J1/0284F25J1/0298F25J2280/20F25J2230/22F04D25/04F25J1/0022F25J2240/80F25J2240/70F25J1/027F04D25/16
Inventor 雷纳·巴林安德烈亚斯·海涅曼弗里茨·克莱纳乌尔里克·汤姆希
Owner SIEMENS AG
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