The bio-oil stabilization system incorporates four process steps,
an extractor operated at 23 C and 3.5 MPa followed by three high
pressure separators operated at 3 MPa, 2 MPa, and 0.2 MPa. Extraction
is carried out in a counter-current liquid–liquid extraction column
with preheated and pressurized bio-oil entering at the top
and near critical propane solvent entering through the bottom at
a conservative solvent to feed ratio of five to one. The mixture then
flows to the first separator where the pressure is reduced and a
portion of the propane is removed. This is repeated through the
second and third separator. The pressure is stepped down through
the collectors to minimize energy requirements for solvent recycle.
Propane that is removed from the first extractor does not require as
much energy for recompression before it is recycled back into the
extractor, compared to propane that is recovered in the last separator.
The solvent is condensed to a liquid state by cooling, and any
non-condensable components are purged from the system. The
recycle stream is pressurized, reheated, and pumped back to the
extractor. Make up solvent is added back to the process to compensate
for solvent losses.
The bio-oil stabilization system incorporates four process steps,an extractor operated at 23 C and 3.5 MPa followed by three highpressure separators operated at 3 MPa, 2 MPa, and 0.2 MPa. Extractionis carried out in a counter-current liquid–liquid extraction columnwith preheated and pressurized bio-oil entering at the topand near critical propane solvent entering through the bottom ata conservative solvent to feed ratio of five to one. The mixture thenflows to the first separator where the pressure is reduced and aportion of the propane is removed. This is repeated through thesecond and third separator. The pressure is stepped down throughthe collectors to minimize energy requirements for solvent recycle.Propane that is removed from the first extractor does not require asmuch energy for recompression before it is recycled back into theextractor, compared to propane that is recovered in the last separator.The solvent is condensed to a liquid state by cooling, and anynon-condensable components are purged from the system. Therecycle stream is pressurized, reheated, and pumped back to theextractor. Make up solvent is added back to the process to compensatefor solvent losses.
การแปล กรุณารอสักครู่..
