ECONOMICAL OPTIONS FOR RECOVERING NGL / LPG AT LNG RECEIVING TERMINALS Part 3

TRADITIONAL RE-GASIFICATION FACILITIES

Two processing schemes that have been used for traditional re-gasification facilities are shown in Figures 1 and 2 below. Neither scheme includes heavy hydrocarbon removal, so the entire LNG stream is vaporized and sent to the pipeline. The scheme in Figure 1 uses submerged combustion vaporizers (SCVs) to provide the heat for the vaporization step. Figure 2 shows a scheme using the LNG Smart® Air Vaporization system offered by Mustang Engineering. This second scheme uses ambient air to provide much of the process heat required for the vaporization step, allowing a significant reduction in plant fuel usage and plant emissions in warmer climates.

                There are several other LNG vaporization methods in addition to those shown below, but the basic plant arrangement is much the same for all of them. Nearly all of these vaporization processes can be integrated easily with Ortloff 's LFP designs for recovering NGL (the C2+ hydrocarbon fraction) and/or LPG (the C3+ hydrocarbon fraction) from the LNG stream being vaporized.