SYSTEM FOR QUENCHING AND SCRUBBING AND COOLING AND WASHING HOT PARTIAL OXIDATION GAS

摘要

A system for quenching and scrubbing hot partial oxidation gas and washing and cooling hot partial oxidation gas is disclosed. During the quenching and scrubbing phase, removal of particulate contaminants is facilitated by using a high pressure settler assembly in combination with a scrubbing tower (10). Preferably, the high pressure settler consists of a sump (18) internal to the scrubbing tower or a sump and quiet zone combination that is internal to the scrubbing tower. Use of the high pressure settler allows for increased settling rates and increased scrubbing efficiency. During the cooling and washing, a knockout drum (45) having an integral washing system is advantageously employed. Use of the knockout drum during the condensing and washing phase of gasification process facilitates removal of ammonia and water vapor from a partial oxidation gas containing water vapor and ammonia. The knockout drum (35) comprises a bottom section (46) and top section (50) with a transfer means (53) connecting the bottom section to the top section. The top section comprises a series of trays (55) capable of channeling water from the upper end of the top section to the lower end of the top section. The transfer means provides unidirectional flow of a fluid from the bottom section to the top section.