Tray DEAERATOR

FEATURES

The counter flow tray design provides removal of all dissolved oxygen in excess of .005 cc/liter from 5% to 100% of the deaerator capacity.

Multiple configurations are available from vertical single tank vessels, standard “tank car” vessels or separate dual parallel horizontal vessels.

Only stainless steel components come in contact with undeaerated water. Both the trays and tray boxes are constructed of stainless steel.

All vessels are ASME Code stamped as per Section VIII 50 psig design pressure unless specified otherwise.

Custom engineered packaged systems available to 600,000 lb/hr. Larger deaerators to 2,000,000 #/hr capacity available as unassembled components for field installation.

 

 

ADVANTAGES

Counter flow tray type deaerators are capable of accepting high percentages of condensate returns without adverse effects on performance. This is possible because the deaeration process does not require a flow of steam for scrubbing. All second stage scrubbing is done by the cascading process through the trays. The counter flow design provides maximum performance because the cleanest incoming steam contacts the water that requires final deaeration, stripping out the last traces of oxygen.

Performance is guaranteed at all loads from 5% to 100% of rating with sizes ranging from 20,000#/hr to 2,000,000 lbs/hr.

 

OPERATION

Makeup water and pumped condensate returns are pumped into the deaerator stainless steel header box. The undeaerated water then passes through several stainless steel spray nozzles which form thin conical sheets of water that contacts steam where it is heated. This heating effect partially releases the dissolved oxygen and other non-condensable from the water. The continuous vent valve then exhausts these released gases to atmosphere. The partially deaerated water then begins to cascade through the trays where additional heating and deaeration occurs.

Steam entering the deaerator flows upward through the stainless steel trays in a counter flow direction where it scrubs the remaining dissolved gases from the water in a final polishing action and heats to near the saturation temperature. High-temperature returns enter the deaerator directly and release flash steam which also flows upward through the deaerator trays supporting the deaeration as well. The deaerated water then drops into the storage section where it remains until needed by the boiler.