| 摘要 |
A single rotary valve is designed to control feed, purge and exit flow in a multiple bed regenerative fume incinerator system thereby replacing the large number of valves heretofore used to operate such a system. The housing of the rotary valve has ports for connection to at least one feed conduit, to at least one exit conduit, to at least 3 regenerator bed conduits and includes an annular opening on the valve axis for a purge gas conduit. The purge gas conduit extends through the annular opening and connects to an interior cavity of the valve rotor which has a peripheral opening registrable individually with the regenerator bed ports. The valve rotor divides the interior chamber of the valve housing into a feed subchamber and an exit subchamber and includes a sealing plenum preventing leakage from the feed subchamber to the exit subchamber. In each of the flow control positions to which the valve rotor is rotatable, one regenerator bed port is connected to the peripheral opening in the valve rotor, half of the remaining regenerator bed ports are connected to the feed subchamber and the other half of the remaining regenerator ports are connected to the exit subchamber. In one embodiment, the valve rotor is tapered and may be adjusted axially to compensate for wear, to prevent rubbing or to increase clearance for some operating conditions.
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