The main objective of blending LNG is to blend low value “Lean” LNG with high value “Rich” LNG to maximize the sale price and improve the quality of the lower specification product. This is achieved by ensuring that the final product is blended to a target BTU specification, at the lowest possible cost.
Annual payback is in the region of $7M - $17M based on a plant producing 3M tons a year.
It is desirable to optimize the energy value of the LNG, ensuring specifications to the various regional areas that exist around the world. Sensia JISKOOT’s LNG blender ensures that the blended LNG is within specification under all circumstances, whilst minimizing the commercial cost.
Feed forward and feedback analyzers are used to ensure our LNG blender meets the uncertainty requirements. The analyzer system provides maximum flexibility, redundancy and speed of response, with measurement of the blended product BTU being executed by a gas analyzer.
Conventional Gas Chromatographs (GC) are too slow for the blending of trim applications and could compromise the accuracy of the final blended product. To improve performance, fast response MicroGC’s are placed on the feed lines to the blender, providing feed forward control of the ratio demand.
Using our LNG blender, short term variance is within better than +/-1% of the target value.