Patent ID: 7841304
Filing Date: 2010-11-30
Classification: F01K,F22B

Abstract:
1. An apparatus for generating steam comprising: a steam drum having a heated water inlet, a drum water outlet and a steam outlet; a heated water conduit in communication with said heated water inlet; said heated water conduit for carrying heated liquid and vapor water to said heated water inlet; a drum water conduit in communication with said drum water outlet for carrying water from said steam drum; a first heat exchange inlet conduit in communication with the drum water conduit for carrying water from said drum water conduit; a first heat exchanger in communication with said first heat exchange inlet conduit for heating the water from said drum water conduit; a first hot petroleum process stream conduit in communication with said first heat exchanger for carrying a first hot petroleum process stream and indirectly transferring heat to the water in said first heat exchanger; a first heat exchange outlet conduit in communication with said first heat exchanger for carrying heated water from said first heat exchanger; said first heat exchange outlet conduit in communication with said heated water conduit for carrying heated water from said first heat exchange outlet conduit; a second heat exchange inlet conduit in communication with the drum water conduit for carrying water from said drum water conduit; a second heat exchanger in communication with said second heat exchange inlet conduit for heating the water from said drum water conduit; a second hot petroleum process stream conduit in communication with said second heat exchanger for carrying a second hot petroleum process stream and indirectly transferring heat to the water in said second heat exchanger; a second heat exchange outlet conduit in communication with said second heat exchanger for carrying heated water from said second heat exchanger; said second heat exchange outlet conduit in communication with said heated water conduit for carrying heated water from said second heat exchange outlet conduit; and a steam outlet conduit in communication with said steam outlet for carrying steam from said steam drum.