초록 ▼

A seal gas pressure booster system for use with a gas compressor, particularly of the type used for boosting pressure in gas transmission, process or utility industries and which contains pressure about the shaft/casing interface with the use of dry gas seals. Seal supply gas is supplied from the di

A seal gas pressure booster system for use with a gas compressor, particularly of the type used for boosting pressure in gas transmission, process or utility industries and which contains pressure about the shaft/casing interface with the use of dry gas seals. Seal supply gas is supplied from the discharge side of the compressor. During normal operation, sufficient head across the compressor exists to supply the necessary flow of seal supply gas against the restrictions provided by the filters, interconnections and components in the seal gas supply system. During startup, or during modes of operation where sufficient head across the compressor does not exist, the pressure booster system increases the pressure of a stream of compressor discharge gas to provide the necessary pressure differential to supply the dry gas seal with a continuous flow of clean, filtered gas.

대표청구항 ▼

1. In combination, a turbomachine having a rotor therein, said rotor having a dry gas seal associated therewith, and a primary seal gas supply system adapted to supply a flow of seal gas to said dry gas seal when a sufficient pressure differential exists as to maintain that flow, said primary seal g

1. In combination, a turbomachine having a rotor therein, said rotor having a dry gas seal associated therewith, and a primary seal gas supply system adapted to supply a flow of seal gas to said dry gas seal when a sufficient pressure differential exists as to maintain that flow, said primary seal gas supply system having an upstream section adapted to be connected to a primary source of said gas and a downstream section connected to said dry gas seal, one-way valve between said upstream and downstream sections preventing a back flow of gas from the downstream section into said upstream section; and a seal gas pressure booster system including a booster compressor having a gas inlet line connected to said upstream section of the primary seal gas supply system and a gas outlet line connected to said downstream section of said primary seal gas supply system for boosting the pressure of the gas using said primary seal gas supply in said downstream section sufficiently to ensure a continuing flow of primary seal supply gas to said dry gas seal during periods when there is an insufficient seal gas pressure differential associated with said primary system as to maintain the desired flow of seal gas therein, means for producing a signal indicative of insufficient seal gas pressure differential, and means associated with said booster compressor for driving the latter to boost the gas pressure in said downstream section in response to said signal.