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ON TOP OF THE COST SAVINGS, YOU CAN PACK QUITE A PUNCH IN ENVIRONMENTAL BENEFITS TOO.
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)ODVKVWHDPUHFRYHU\ Flash steam can be harvested and re-used. This is formed when high pressure condensate is exposed to a large pressure drop, often created during the blowdown process. $ÀDVKYHVVHOLVMXVWRQHPHWKRGWKDWFDQEHXVHGWRUHFRYHU HQHUJ\E\VHSDUDWLQJÀDVKVWHDPIURPFRQGHQVDWH$V FRQGHQVDWHHQWHUVWKHÀDVKYHVVHOÀDVKVWHDPLVSURGXFHG and can be piped from the top of the vessel to the feedtank through the deaerator. :HFDQ¿WÀRDWWUDSVWRWKHRXWOHWRIWKHÀDVKYHVVHOZKHUH residual blowdown water will be drained. The water will still be hot at this point and is allowed to pass into the plated heat exchanger where it gives up its heat to the circulating cold make-up water. In other words, if we use the hot water from the ÀDVKYHVVHOKHDWHQHUJ\LVUHFRYHUHG 7KHXVHRIERWKDÀDVKYHVVHODQGSODWHGKHDWH[FKDQJHUSDFN will allow you to recover up to 80% of the energy from the UHMHFWHG7RWDO'LVVROYHG6ROLGV 7'6 ZDWHUZKLFKFDQDOVR result in fuel savings, a reduction in carbon dioxide emissions, and the elimination of unsightly plumes of steam. So, on top of the cost savings, you can pack quite a punch in environmental EHQH¿WVWRR
14
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9
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Atmospheric pressure
3
2
1
0
0
0.02
0.06
0.10 10%
0.14
0.18
0.2
kg Flash steam/kg condenste
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