skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Inventors:
 [1];  [2];  [2];  [2]
  1. Los Altos, CA
  2. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865932
Patent Number(s):
4601811
Assignee:
United States of America as represented by United States Department (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; oil; shale; retorting; gravity-driven; solids; flow; solid-solid; heat; exchange; cascading; bed; apparatus; cold; raw; crushed; enters; middle; retort; column; mixer; stage; rapidly; mixed; hot; recycled; heated; pyrolysis; temperature; mixture; passes; pyrolyzer; resides; sufficient; time; complete; occur; spent; recirculated; burner; residual; char; burned; retorting process; pyrolysis temperature; shale retort; heat exchange; oil shale; sufficient time; spent shale; shale retorting; solids flow; bed retorting; residual char; mixer stage; rapidly mixed; retort column; shale enters; recycled shale; raw crushed; cold raw; heated mixture; hot recycled; cascading bed; crushed shale; /208/201/

Citation Formats

Lewis, Arthur E, Braun, Robert L, Mallon, Richard G, and Walton, Otis R. Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange. United States: N. p., 1986. Web.
Lewis, Arthur E, Braun, Robert L, Mallon, Richard G, & Walton, Otis R. Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange. United States.
Lewis, Arthur E, Braun, Robert L, Mallon, Richard G, and Walton, Otis R. Wed . "Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange". United States. https://www.osti.gov/servlets/purl/865932.
@article{osti_865932,
title = {Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange},
author = {Lewis, Arthur E and Braun, Robert L and Mallon, Richard G and Walton, Otis R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

Save / Share: