Purge retention chamber incorporated into RTO inlet manifold

Details Purge retention chamber incorporated into RTO inlet manifold Purge retention chamber incorporated into RTO inlet manifold

1996-03-11

1998-03-24

Bhat, Nina

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422175, 422178, 422223, 432170, 432181, F01N 310

Patent

active

057309450

ABSTRACT:
A purge retention chamber is incorporated into an inlet manifold for a two heat exchanger RTO system. A bypass valve is mounted into the purge retention chamber adjacent a downstream end, and a purge face valve is mounted in the inlet manifold between upstream and downstream connection ends of the purge retention chamber. During normal operation, the bypass valve is closed and clean air fills the purge retention chamber. Dirty air to be cleaned passes through the purge face valve and moves to a heat exchanger in an inlet mode. When a purge mode begins, the purge face valve is closed and the purge bypass valve is opened. Now, clean purge gas moves into the inlet manifold and is delivered to a heat exchanger which is beginning to switch from an inlet mode to an outlet mode. The clean purge gas purges the heat exchanger. Once the purging is complete, the heat exchangers are switched between inlet and outlet modes. Preferably, after the inlet/outlet valve switch has occurred, the purge bypass and purge face valve switch back and the system returns to normal operation delivering dirty gas to be cleaned to the heat exchanger that is now in an inlet mode.

REFERENCES:
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PCT International Application, Publication Number WO 91/00477, Application No. PCT/SE90/00453, Filing Date: Jun. 25, 1990. Entitled: A Method and a Device in Gas Purifying Installations for Preventing Discharge of Unpurified Gas Upon Changes of the Gas-Flow Direction.

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