SYSTEM FOR SYNGAS CLEAN-UP OF SEMI-VOLATILE ORGANIC COMPOUNDS

摘要

A system and method for processing unconditioned syngas first removes solids and semi-volatile organic compounds (SVOC), then removes volatile organic compounds (VOC), and then removes at least one sulfur containing compound from the syngas. Additional processing may be performed depending on such factors as the source of syngas being processed, the products, byproducts and intermediate products desired to be formed, captured or recycled and environmental considerations.

主权项

1. A system for removing solids and semi-volatile organic compounds (SVOC) from unconditioned syngas having steam contained therein, the unconditioned syngas having a first temperature above a SVOC condensation temperature, the system comprising:
a venturi scrubber (8100) configured to receive the unconditioned syngas, solvent and water and output an intermediate SVOC-depleted syngas containing steam together with a first mixture comprising SVOC, solids, solvent and water; a char scrubber (8125) configured to receive the intermediate SVOC-depleted syngas containing steam and the first mixture, and separately output: (i) a first depleted syngas stream which has a reduced amount of SVOC relative to the unconditioned gas stream, and (ii) a second mixture comprising SVOC, solids, solvent and water; a decanter (8275) configured to receive the second mixture and separate the water within the second mixture based upon immiscibility so that the SVOC, solids and solvent collect together to form a third mixture separate from the water within the decanter, the decanter further configured to separately output the water and the third mixture; and a vessel (8300) arranged to receive the third mixture, the vessel having at least one liquid phase candle filter and a vessel bottom provided with a drain port; wherein: the candle filter is capable of operating so that: (i) the solids agglomerate on a surface of the candle filter and form a filter cake, and (ii) the SVOC and solvent are removed through the candle filter, and the drain port is suitable for removing filter cake therethrough.