| 摘要 |
To avoid formation of condensate or freezing in the tandem gas seals (12, 13) of a gas compressor (1), such as for use in the compression of production of natural gas, when the compressor is temporarily stopped for maintenance or repair of the compressor or instrumentation, the settle out pressure (SOP) in the high pressure gas discharge line (7) from the compressor (1), arising from equalising the inlet and outlet gas pressures, is directed to cause gas to flow through a branch line (25) to the outboard gas seal (13), the gas being heated by an electrical heating coil (28) and its pressure being reduced in a controlled manner. In this way, the gas is prevented from entering its liquid-vapour phase, so that no condensate can form in the inboard and outboard gas seals (12, 13). <IMAGE> |
