Abstract: A regenerative thermal oxidizer system (20) for use in processing a contaminated fluid. The system includes a combustion chamber (22), a contaminated fluid feed duct (39), and at least a first (24) and a second (26) regenerator chambers in fluid communication with the combustion chamber (22). A regenerator half-chamber (21) is provided in fluid and thermal communication with the combustion chamber (22). A first flow control element (44) is provided for controlling a flow of fluid from the system fluid feed duct (39) to the first regenerator chamber (24), and a second flow control element (46) is provided for controlling a flow of fluid from the system fluid feed duct (39) to the second regenerator chamber (26). An intermittent supply duct (60) connects the system fluid feed duct (39) to the regenerator half-chamber (21). A third flow control element (62) controls flow of system feed fluid through the intermittent supply duct (60).

Abstract: A rotary valve (10) and valve assembly for use in a regenerative oxidizer (12). The rotary valve (10) has a central shaft (32) with a longitudinal axis (L), and a plurality of gas flow plenums (60, 64, 68) extending along the shaft (32), at least a portion of each plenum extending around a portion of the shaft (32) in a spiral configuration. The rotary valve (10) is incorporated into a rotary valve assembly comprising an inner housing (72) enclosing the valve (10). The inner housing (72) is fixed with respect to the valve (10) so as to rotate in correspondence with the valve (10). A plurality of windows (80, 84, 86) is formed along the inner housing (72), at least one window of the plurality of windows (80, 84, 86) being in fluid communication with a corresponding one of the valve plenums (60, 64, 68).