Patent ID: 9562833
Date: 2017-02-07
CPC Classifications: G01N

Claim:
1. An apparatus for capturing a periodic gas sample following vaporizing and conditioning into a gas phase of a cryogenic liquid hydrocarbon source during transfer processing, comprising: at least a first and a second vaporized sample input lines each incorporating at least a first direct feed line, a second speed loop line, and a third accumulator feed line; each of the first direct feed lines of the first and second vaporized sample input lines being directly connected to a gas analyzer for on-line, real-time, periodic analysis of a non-composite gas sample; each of the speed loop lines being connected to a speed loop having a pressure regulator, at least one high pressure pump, a plurality of solenoid controlled valves for controlled filling of a plurality of non-composite sample cylinders for storage of fresh gas samples obtained at specified processing intervals, and a by-pass outlet to a boil-off-gas system; each of the accumulator lines including at least one solenoid controlled valve, said accumulator line for passing a gas sample of a select volume at select time intervals to a pressure regulator, a solenoid controlled valve, and a gas accumulator for receiving multiple periodic select volume gas samples to create a composite gas sample, and a valve controlled outlet from the gas accumulator, where said at least one high pressure pump maintains pressure sufficient in the gas accumulator to prevent dew point drop-out of the gas sample, and a plurality of sample grab cylinders for receiving composite samples from the gas accumulator upon completion of source processing.