Entrained pretreatment and coal transport

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

OSTI ID:6528126

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

One of the problems in gasification of caking coals is agglomeration of the coal in the processing equipment. Thus it is desirable to destroy the caking properties. 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. The SYNTHANE process has a pressurized fluid bed pretreater. A transport line is used to convey the coal to the pretreater. Pretreatment can occur in the transport line, if oxygen is available and the coal is heated. An experimental program for entrained pretreatment has been initiated and experimentation carried out to elucidate the effect of changing independent parameters such as coal feed rate, gas velocity and oxygen partial pressure, on the degree of pretreatment. The prime object of this paper is to report the results of these experiments. The secondary subject of this report, coal transport in pressurized lines, has been researched as an aid to the redesign of the transport system of the 72 ton/day SYNTHANE facility. A series of pressure drips were measured as a function of coal rate and superficial gas velocity to obtain information that could aid in the design of commercial units.

• Research Organization: Pittsburgh Energy Research Center
• OSTI ID: 6528126
• 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
CHEMICAL REACTIONS
COAL GASIFICATION
ENTRAINMENT
FLUIDIZED BED
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUNCTIONAL MODELS
GASIFICATION
OXIDATION
PNEUMATIC TRANSPORT
PRESSURE DROP
PROCESS DEVELOPMENT UNITS
SYNTHANE PROCESS
THERMOCHEMICAL PROCESSES
TRANSPORT