Block heat exchanger assembly operating method for combustion device, involves spraying condensate from neutralization and collection vessel and/or fresh water into hot flue gas at or immediately before entry into block

摘要

The method involves causing flue gas and condensate to flow in cocurrent. Condensate from a neutralization and collection vessel and/or fresh water is sprayed into hot flue gas at or immediately before entry into a graphite heat exchanger block, in an amount causing a flue gas stream to be saturated with water vapor. The condensate droplets are separated from the flue gas stream leaving the block using demister. An independent claim is also included for a block heat exchanger assembly comprising a heat exchanger block.