Report of a conference in Poelitz on paste heat exchange

Technical Report · Tue Oct 21 04:00:00 EST 1941

OSTI ID:6570512

Mueller,

This report related the experience of the I.G. Farbenindustrie laboratory at Ludwigshafen and the hydrogenation plant at Poelitz in heat exchange involving the coal paste. In that process, a part of the coal paste to be introduced into the hydrogenation ovens was diluted with recycled heavy oil to a certain concentration and then passed through heat exchangers to be preheated by exchange with the hot product (from the ovens) which needed to be cooled. According to the experiences of Ludwigshafen and Poelitz, operations went very well with this process as long as the concentration of solids in the coal paste was at most 40% to 42%. However, both installations had found that a higher concentration of solids led to disturbences in operations, such as worsened heat-transfer coefficients of the heat exchangers, increased pressure drops through the system, and even breakdowns in equipment due to corrosion. With at most 40% solids in the paste, the overall heat-transfer coefficient was about 300 Cal per m/sup 2/ per /sup 0/C per hour. In terms of savings involved by using coal paste heat exchange, Poelitz had estimated them at 450,000 to 500,000 Reichsmarks per chamber per year, under the estimate of 1 Pfg per 1000 calories for gas that would otherwise be used for preheating the entire coal paste. Experiences were too short to give a firm estimate on how much those savings would be reduced by extra repair work necessary on the system because of paste heat exchange.

• Research Organization: Hydrierwerke Scholven, A.G., Buer (Germany)
• OSTI ID: 6570512
• Report Number(s): TOM-11-343-344
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ABRASION
BERGIUS PROCESS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUEFACTION PLANTS
COAL PASTES
COST
EFFICIENCY
ENERGY SOURCES
ENERGY TRANSFER
EVALUATION
FLOW RATE
FLUIDS
FOSSIL FUELS
FUELS
GASES
GERMANY
HEAT TRANSFER
HEATING
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGENATION
INDUSTRIAL PLANTS
LIQUEFACTION
PHYSICAL PROPERTIES
PRESSURE DROP
QUANTITY RATIO
SYNTHETIC FUELS
TECHNOLOGY TRANSFER
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES