Entrained pretreatment and coal transport

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Coal Process. Technol.; (United States)

OSTI ID:6477427

Saroff, L; Gromicko, F N; Johnson, G E; Strakey, J P; Haynes, W P

There are many means of treating caking coal to alleviate the agglomerating properties. Several gasification processes under development mildly oxidize the caking coals with air or oxygen. Other processes use pyrolysis, or gasification and hydrogenation at dilute concentrations of the fresh caking coal. The method used in the SYNTHANE process involves mild oxidation in a fluid bed reactor at the pressure of the gasifier. Pretreating the coal at system pressure retains the organics released as product and preheats the coal for gasification. Results of an experimental study are presented which show that the amount of oxygen that has to react with the caking coal to render the coal non-agglomerating is 0.65 SCF of O/sub 2/ reacted per pound of coal (maf) for Illinois No. 6 coal and 0.8 SCF of O/sub 2/ reacted per pound of coal (maf) for Pittsburgh coal. These values are close to accepted operating conditions in the fluid fed pretreaters of 1.0 SCF of O/sub 2/ per pound of coal. For coal transport, various literature correlations were checked against the measured results. The differences indicate that considerable research is required to obtain a more fundamental understanding of solid flow in the entrained state. The equation offered in this report for solid pressure drop as a function of gaseous flow and solid mass flux has been used to predict the pressure drop in the transport line of the 72 ton/day SYNTHANE pilot plant, within the errors of the measurements. 25 references.

• Research Organization: ERDA, Pittsburgh, PA
• OSTI ID: 6477427
• Journal Information: Coal Process. Technol.; (United States), Journal Name: Coal Process. Technol.; (United States) Vol. 3; ISSN CPRTD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
013000 -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AGGLOMERATION
BITUMINOUS COAL
BLACK COAL
CAKING POWER
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COAL PREPARATION
COMMINUTION
ENERGY SOURCES
ENTRAINMENT
FLUIDIZED BED
FOSSIL FUELS
FOULING
FUELS
GASIFICATION
MATERIALS
MATERIALS HANDLING
NATIONAL ORGANIZATIONS
OXIDATION
SYNTHANE PROCESS
THERMOCHEMICAL PROCESSES
TRANSPORT
US ERDA
US ORGANIZATIONS