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

Title: Method and system including a double rotary kiln pyrolysis or gasification of waste material

Abstract

A method is described for destructively distilling an organic material in particulate form wherein the particulates are introduced through an inlet into one end of an inner rotating kiln ganged to and coaxial with an outer rotating kiln. The inner and outer kilns define a cylindrical annular space with the inlet being positioned in registry with the axis of rotation of the ganged kilns. During operation, the temperature of the wall of the inner rotary kiln at the inlet is not less than about 500 C to heat the particulate material to a temperature in the range of from about 200 C to about 900 C in a pyrolyzing atmosphere to reduce the particulate material as it moves from the one end toward the other end. The reduced particulates including char are transferred to the annular space between the inner and the outer rotating kilns near the other end of the inner rotating kiln and moved longitudinally in the annular space from near the other end toward the one end in the presence of oxygen to combust the char at an elevated temperature to produce a waste material including ash. Also, heat is provided which is transferred to the innermore » kiln. The waste material including ash leaves the outer rotating kiln near the one end and the pyrolysis vapor leaves through the particulate material inlet. 5 figs.« less

Inventors:
;
Issue Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
527776
Patent Number(s):
5,662,052
Application Number:
PAN: 8-557,656
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 320305; 092000; PA: EDB-97:125368; SN: 97001846777
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 2 Sep 1997
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 09 BIOMASS FUELS; ORGANIC WASTES; DESTRUCTIVE DISTILLATION; KILNS; OPERATION; DESIGN; ANNULAR SPACE; CHARS; PYROLYTIC GASES

Citation Formats

McIntosh, M.J., and Arzoumanidis, G.G. Method and system including a double rotary kiln pyrolysis or gasification of waste material. United States: N. p., 1997. Web.
McIntosh, M.J., & Arzoumanidis, G.G. Method and system including a double rotary kiln pyrolysis or gasification of waste material. United States.
McIntosh, M.J., and Arzoumanidis, G.G. Tue . "Method and system including a double rotary kiln pyrolysis or gasification of waste material". United States.
@article{osti_527776,
title = {Method and system including a double rotary kiln pyrolysis or gasification of waste material},
author = {McIntosh, M.J. and Arzoumanidis, G.G.},
abstractNote = {A method is described for destructively distilling an organic material in particulate form wherein the particulates are introduced through an inlet into one end of an inner rotating kiln ganged to and coaxial with an outer rotating kiln. The inner and outer kilns define a cylindrical annular space with the inlet being positioned in registry with the axis of rotation of the ganged kilns. During operation, the temperature of the wall of the inner rotary kiln at the inlet is not less than about 500 C to heat the particulate material to a temperature in the range of from about 200 C to about 900 C in a pyrolyzing atmosphere to reduce the particulate material as it moves from the one end toward the other end. The reduced particulates including char are transferred to the annular space between the inner and the outer rotating kilns near the other end of the inner rotating kiln and moved longitudinally in the annular space from near the other end toward the one end in the presence of oxygen to combust the char at an elevated temperature to produce a waste material including ash. Also, heat is provided which is transferred to the inner kiln. The waste material including ash leaves the outer rotating kiln near the one end and the pyrolysis vapor leaves through the particulate material inlet. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {9}
}