Application: The PRENFLO (PRessurized ENtrained-FLOw) direct quench (PDQ) is an optimized design of the proven PSG gasification process for all types of solid feedstock as petcoke, solid refinery residues, coal and biomass for chemical applications (ammonia,methanol, hydrogen, synfuel.)
Description: First, the feed dust is prepared in the feed preparation unit. Approximately 80% of the dust is smaller than 0.1 mm and has a water content of approximately 1 wt%–2 wt% in the case of hard coals, and approximately 8 wt%–10 wt% for lignite.
This feed dust is gasified in the PRENFLO gasifier using oxygen and steam as the gasification agent. The gasification temperature is higher than ash-melting temperature, which allows feedstocks containing ash to be removed as slag. The cooled-type gasifier is equipped with multiple, horizontally arranged burners.
The raw gas produced, which contains mainly carbon monoxide and hydrogen, is quenched with water in a direct quench in the gasifier vessel and then cleaned in a scrubber.
Licensor: Uhde GmbH