Patent ID: 6116259
Filing Date: 2000-09-12
Classification: G05D,Y10T

Abstract:
A system for providing controllable vapor/liquid ratio in the output line of a pipeline having a junction therein having an input leg and at least one output leg, comprising:an essentially vapor phase only output leg branching from said pipeline;a vapor orifice in said essentially vapor phase only output leg of said junction and having pressure taps on either side of said orifice;means for measuring the pressure drop across said vapor orifice .DELTA.P.sub.v and P.sub.v, the pressure on the upstream side thereof;a second, essentially only liquid bypass leg having a smaller diameter than said essentially vapor phase only output leg and having a liquid sump input on the upstream end thereof located on the lower side of said pipeline and having a liquid orifice in said liquid bypass leg and having an output end thereof located in said essentially vapor phase only output leg downstream of said vapor orifice and means for measuring P.sub.L and .DELTA.P.sub.L the pressure at said liquid orifice and the pressure drop across said liquid orifice in said liquid bypass leg;an adjustable flow control valve in said liquid bypass leg downstream of said liquid orifice; andmeans for adjusting said liquid flow control valve in response to said .DELTA..sub.v, P.sub.v, .DELTA.P.sub.L and P.sub.L measurements to produce a desired vapor/liquid ratio in said pipeline output line.