Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange

Patent · Wed Jan 01 04:00:00 EST 1986

OSTI ID:865932

Lewis, Arthur E ^[1]; Braun, Robert L ^[2]; Mallon, Richard G ^[2]; Walton, Otis R ^[2]

---

1. Los Altos, CA
2. Livermore, CA

A cascading bed retorting process and apparatus in which cold raw crushed shale enters at the middle of a retort column into a mixer stage where it is rapidly mixed with hot recycled shale and thereby heated to pyrolysis temperature. The heated mixture then passes through a pyrolyzer stage where it resides for a sufficient time for complete pyrolysis to occur. The spent shale from the pyrolyzer is recirculated through a burner stage where the residual char is burned to heat the shale which then enters the mixer stage.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States Department (Washington, DC)
• Patent Number(s): US 4601811
• OSTI ID: 865932
• Country of Publication: United States
• Language: English

Related Subjects

/208/201/
apparatus
bed
bed retorting
burned
burner
cascading
cascading bed
char
cold
cold raw
column
complete
crushed
crushed shale
enters
exchange
flow
gravity-driven
heat
heat exchange
heated
heated mixture
hot
hot recycled
middle
mixed
mixer
mixer stage
mixture
occur
oil
oil shale
passes
process
pyrolysis
pyrolysis temperature
pyrolyzer
rapidly
rapidly mixed
raw
raw crushed
recirculated
recycled
recycled shale
resides
residual
residual char
retort
retort column
retorting
retorting process
shale
shale enters
shale retort
shale retorting
solid-solid
solids
solids flow
spent
spent shale
stage
sufficient
sufficient time
temperature
time