Sample Conditioning System for Low Pressure Gas

摘要

A system and method for conditioning of very low pressure gas samples extracted from a source, heating the samples, boosting the pressure to a level appropriate for analysis, regulating the gas sample temperature and pressure to prevent dew-point dropout from Joules Thompson condensation, and passing the gas sample to an a remotely located analyzer or analyzer array where the electrical power for the pressurizing pump and heated regulator is provided by heat tracing.

主权项

1. A system for conditioning a gas sample from a low pressure gas source, comprising:
a cabinet with an enclosed interior, a sample gas input line at least partially disposed in the cabinet interior; a heated gas regulator and for thermally conditioning a sample gas at a low pressure to a temperature preventing dew point condensation; a control unit for the heated regulator; a metering pump for drawing the low pressure gas sample into the cabinet and boosting the low pressure sample gas to a pressure of between 10-45 psig, said pump including an electric motor which projects from the exterior of the cabinet; a first heated gas sample line for communicating the heated gas sample from the heated regulator to the pump and a second gas line for communicating the heated and pressurized gas from the pump to a gas analyzer remotely spaced from the cabinet through an insulated conduit; electric power providing heat tracing extending through the insulated conduit and into the cabinet; and a shielded electrical junction box with a heat tracing input fitting and shielded electrical conduits extending between said junction box to each of the heated gas regulator, the control unit, and the electric motor of the pump.