Plate Heat Exchangers for a Petrochemical Producer

Pre-heat personnel made several trips to this facility to discuss the replacement process, materials construction, and project timing as well as to obtain critical dimensions.

Pre-heat designed three special I-U flow pattern heat exchangers using cross-flow heat exchanger modules.

The clean air traveled through the I-pass of the exchanger, which was the inside of the membrane envelopes. The dirty air stream passed through the U-pass of the exchanger, which was on the outside of the membrane envelopes. This was done so that any liquids condensed out of the dirty air stream would collect in the drain pans at the bottom of the exchanger.

Also, the U-pass side of the exchanger could be cleaned, and any cleaning solution and particulate would exit the exchanger through the bottom drains located in the bottom shell of the exchangers. With this system, the exchangers could be cleaned in place, and the customer would not have to be concerned with the buildup of condensed liquid and particulate matter in the exchanger that could prematurely corrode the exchanger.