| 摘要 |
The present invention provides for a method of recovering energy from water produced during heavy oil recovery, comprising the steps of: p) providing a high pressure blowdown stream; q) flashing the high pressure blowdown stream to form low pressure waste energy stream and concentrated blowdown; r) vaporizing produced water with low pressure waste energy stream; s) preheating the produced water feed stream with concentrate blowdown stream; t) providing a fluid circulation circuit including a heated separator and a reboiler exchanger in fluid communication; u) passing preheated produced water feed stream into the heated separator; v) passing the waste energy into the reboiler for recovery of heat energy; w) vaporizing the produced water stream with the waste energy in the reboiler exchanger to generate a vapor fraction and a concentrate liquid contaminant fraction; x) circulating at least a portion of the concentrate liquid fraction through the reboiler exchanger and the heated separat or to maintain a ratio of mass of concentrate to vapor fraction of between 300 and 2 to result in a vapor fraction of about 1% by mass to less than 50% by mass exiting the reboiler exchanger to prevent fouling and scaling in the reboiler; y) condensing the vapor fraction with an external condensing means; and z) collecting condensed vapor fraction and waste energy stream substantially devoid of contaminants.
|
