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integral gear type compressor to a Single Mixed Refrigerant LNG plant.

IP.com Disclosure Number: IPCOM000245218D
Publication Date: 2016-Feb-18
Document File: 2 page(s) / 225K

Publishing Venue

The IP.com Prior Art Database

Abstract

The use of integral gear compression is particularly attractive for single mixed refrigerant plants since the process benefits greatly with the use of multiple intercoolers and these are easily accommodated using a single integral gear compressor.

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Compression System

This disclosure describes the application of an integral gear type compressor to a Single Mixed Refrigerant LNG plant.  

The use of integral gear compression is particularly attractive for single mixed refrigerant plants since the process benefits greatly with the use of multiple intercoolers and these are easily accommodated using a single integral gear compressor.  However, the concept would also be applicable to any other type of refrigeration system such as propane precooled mixed refrigerant, cascade, dual mixed refrigerant, gas phase refrigeration and any other process suitable for the liquefaction of natural gas.  It is not limited to any refrigerant or heat exchanger type or refrigerant compression system.  The integral gear compressor may be driven by any type of driver such as electric motors, industrial gas turbines, aero-derivative gas turbines, steam turbines, etc.

Figure 1 shows an integral gear compressor having an electric motor drive, two pinions driving four impellers, although multiple number of pinions and impellers could be considered. Natural gas feed enters the warm bundle of the liquefaction system to be cooled.  Typically the natural gas is further cooled and liquefied in a middle and cold bundle of the liquefaction system (not shown).  Low pressure gaseous mixed refrigerant typically containing components such as pentanes, butanes, propane, ethane or ethylene, methane, and nitrogen is sent to the compression system and compressed in impeller C1. It is then cooled using ambient...