Disposal System – Boiler Feedwater Failure

A loss of boiler feedwater can result in a loss of process cooling in boiler feedwater preheaters and waste heat steam generators, causing multiple discharges to the disposal system. A prolonged failure can also result in the loss of steam supply.

Determination of Credibility

The potential for a loss of boiler feedwater can be determined in a manner similar to loss of cooling water. In addition to a loss of boiler feedwater supply pumps, a blockage or rupture of a single supply line could also result in the loss of boiler feedwater.

Determination of Impact on the Collection and Disposal System

Boiler feedwater is often preheated by cooling or condensing process fluids. Therefore, a loss of boiler feedwater may result in overpressure via a loss of process cooling. In addition, an extended loss of boiler feedwater can result in a loss of inventory in steam drums. Subsequent loss of boiler feedwater circulation to waste heat generators can also result in overpressure due to loss of process cooling. In addition, the steam supply may eventually be lost. The impact of a loss of steam is described above.


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