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Title: Cyclone oil shale retorting concept. [Use it all retorting process]

Abstract

A new concept for above-ground retorting of oil shale was disclosed by A.E. Harak in US Patent No. 4,340,463, dated July 20, 1982, and assigned to the US Department of Energy. This patent titled System for Utilizing Oil Shale Fines, describes a process wherein oil shale fines of one-half inch diameter and less are pyrolyzed in an entrained-flow reactor using hot gas from a cyclone combustor. Spent shale and supplemental fuel are burned at slagging conditions in this combustor. Because of fines utilization, the designation Use It All Retorting Process (UIARP) has been adopted. A preliminary process engineering design of the UIARP, analytical tests on six samples of raw oil shale, and a preliminary technical and economic evaluation of the process were performed. The results of these investigations are summarized in this report. The patent description is included. It was concluded that such changes as deleting air preheating in the slag quench and replacing the condenser with a quench-oil scrubber are recognized as being essential. The addition of an entrained flow raw shale preheater ahead of the cyclone retort is probably required, but final acceptance is felt to be contingent on some verification that adequate reaction time cannot be obtainedmore » with only the cyclone, or possibly some other twin-cyclone configuration. Sufficient raw shale preheating could probably be done more simply in another manner, perhaps in a screw conveyor shale transporting system. Results of the technical and economic evaluations of Jacobs Engineering indicate that further investigation of the UIARP is definitely worthwhile. The projected capital and operating costs are competitive with costs of other processes as long as electric power generation and sales are part of the processing facility.« less

Authors:
; ;
Publication Date:
Research Org.:
USDOE Laramie Project Office, WY
OSTI Identifier:
6861699
Alternate Identifier(s):
OSTI ID: 6861699; Legacy ID: DE84009281
Report Number(s):
DOE/METC-84-20
ON: DE84009281
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
04 OIL SHALES AND TAR SANDS; OIL SHALE FINES; RETORTING; OIL SHALES; CHEMICAL ANALYSIS; CYCLONE COMBUSTORS; ECONOMICS; FEASIBILITY STUDIES; SHALE OIL; WASTE PRODUCT UTILIZATION; BITUMINOUS MATERIALS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMBUSTORS; DECOMPOSITION; ENERGY SOURCES; FOSSIL FUELS; FUELS; MATERIALS; MINERAL OILS; OILS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS 040402* -- Oil Shales & Tar Sands-- Surface Methods

Citation Formats

Harak, A.E., Little, W.E., and Faulders, C.R.. Cyclone oil shale retorting concept. [Use it all retorting process]. United States: N. p., 1984. Web. doi:10.2172/6861699.
Harak, A.E., Little, W.E., & Faulders, C.R.. Cyclone oil shale retorting concept. [Use it all retorting process]. United States. doi:10.2172/6861699.
Harak, A.E., Little, W.E., and Faulders, C.R.. Sun . "Cyclone oil shale retorting concept. [Use it all retorting process]". United States. doi:10.2172/6861699. https://www.osti.gov/servlets/purl/6861699.
@article{osti_6861699,
title = {Cyclone oil shale retorting concept. [Use it all retorting process]},
author = {Harak, A.E. and Little, W.E. and Faulders, C.R.},
abstractNote = {A new concept for above-ground retorting of oil shale was disclosed by A.E. Harak in US Patent No. 4,340,463, dated July 20, 1982, and assigned to the US Department of Energy. This patent titled System for Utilizing Oil Shale Fines, describes a process wherein oil shale fines of one-half inch diameter and less are pyrolyzed in an entrained-flow reactor using hot gas from a cyclone combustor. Spent shale and supplemental fuel are burned at slagging conditions in this combustor. Because of fines utilization, the designation Use It All Retorting Process (UIARP) has been adopted. A preliminary process engineering design of the UIARP, analytical tests on six samples of raw oil shale, and a preliminary technical and economic evaluation of the process were performed. The results of these investigations are summarized in this report. The patent description is included. It was concluded that such changes as deleting air preheating in the slag quench and replacing the condenser with a quench-oil scrubber are recognized as being essential. The addition of an entrained flow raw shale preheater ahead of the cyclone retort is probably required, but final acceptance is felt to be contingent on some verification that adequate reaction time cannot be obtained with only the cyclone, or possibly some other twin-cyclone configuration. Sufficient raw shale preheating could probably be done more simply in another manner, perhaps in a screw conveyor shale transporting system. Results of the technical and economic evaluations of Jacobs Engineering indicate that further investigation of the UIARP is definitely worthwhile. The projected capital and operating costs are competitive with costs of other processes as long as electric power generation and sales are part of the processing facility.},
doi = {10.2172/6861699},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EST 1984},
month = {Sun Apr 01 00:00:00 EST 1984}
}

Technical Report:

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  • A system for utilizing oil shale fines, in which the fines, instead of being rejected as wastes, are crushed even finer and then are used in a cyclone retort is described. This patented process uses high combustion temperature that removes all of the organic material from the spent shale and converts it into an inert, granulated slag. The primary advantages of this retorting system over more conventional aboveground retorting processes are the ability to use finely divided oil shales as charge stock and the production of an essentially inert slag from the retorted shale. A series of calculations were mademore » to evaluate variations of the original concept. The original process design was based on a cyclone furnace temperature of 2800{degree}F and the use of hot combustion gases as the retorting medium. A recent study of retorted and burned oil shale properties showed that molten slag could be produced at temperatures lower than 2800{degree}F; therefore, additional calculations were made using a furnace temperature of 2300{degree}F. 11 refs., 6 figs., 11 tabs.« less
  • The present volume is the first of a series of three constituting the title study. It provides a brief but thorough description of six Oil Shale Retorting Processes, namely: Paraho, Tosco II, Oxidental Modified In-Situ, Rio Blanco, Union Oil, and Superior Oil. The processes are treated at Unit Operations level, including operations such as Mining, Crushing, Screening, Conveying, Hydrogenation (or Upgrading), Hydrogen Manufacturing Plant, Amine Treating, Low-Btu Gas Treating, Tail Gas Treating, Sulfur Recovery, Wastewater Treatment, Sour Waste Stripping, Refining, Spent Shale Disposal, etc. The present first volume of the study provides most process engineering information required in order formore » Control Requirements, at specific points of a given unit operations flowsheet, to be fully assessed. Flow sheets for unit operations presented in the present Volume I are only conceptual and qualitative. Some quantitative data on volumeric flow rates of specific flow streams are occasionally given. However, no systematic effort has been presently made to develop a numerical data base on process flow streams. This has been done in a much more systematic and thorough manner in another FMR study performed on behalf of DOE under title Source Terms for the Health and Environmental Effects Document (HEED) for Oil Shale - 1982. Additional original quantitative analysis has been performed by FMR towards developing material balances for specific oil shale feeds into specific retorting processes.« less
  • A detailed study of the geology of the Cowboy Canyon area near Bonanza, Utah was completed that showed the area would be well suited for an experimental program. Almost fifty feet of continuous oil shale, assaying about 30 gallons of oil per ton was found in the Mahogany Zone region. The oil shale strength, and the location and spacing of the joint system would allow mining and retort construction without unusual safety problems or excessive subsidence. The absence of aquifers in the immediate vicinity of the proposed experimental horizon eliminated a critical environmental concern. Detailed engineering studies were made thatmore » showed that the horizontal modified in situ retorting technology could be economically viable with only minor improvements resulting in some reduction in costs. Research conducted for the Laramie Center and by others in the preparations of vertical modified in situ retorts and horizontal retorts show that many improvements have been made in blasting techniques needed for retort preparation. The experimental program proposed in this report for the Cowboy Canyon site could be conducted with some revisions to the original planning documents to include the results of research conducted after the documents were originally completed.« less