Energy recovery unit with flash steam and condensate heat exchangers

摘要

An energy recovery unit 10 has a condensate flash vessel 12 with a condensate inlet 50, condensate outlets 34,36 and a feed line 18 defining a fluid path through first and second heat exchangers 14,16 located within the vessel 12 that transfer heat from flash vapour and condensate respectively to fluid in the feed line. The unit 10 can be used to recover waste energy from condensate and flash steam and use it to pre-heat process water, such as boiler feed water. The feed line 18 can exit and re-enter the vessel 12, the heat exchangers 14,16 can have vertical fins, and a the vessel can have a flash steam outlet 42. The unit can be a self-contained module with ancillaries such as meters, gauges, isolation and bypass valves, and coupling flanges.