FURNACE CONTROL

The method and the appliance employ at least two parallel coiled pipes (2, 3, 4, 5); the material stream to be heated and/or to be evaporated flows via the coiled pipes in divided form. The temperature Ti of the material stream is measured at the end of each coiled pipe i (13, 14, 15, 16) and the me...

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Bibliographic Details
Main Authors J.F. BOS, J. OOSTERVINK, A. VAN DER HEIJDEN
Format Patent
LanguageEnglish
Published 24.01.1980
Subjects
BLASTING
CHEMISTRY
COMBUSTION APPARATUS
COMBUSTION PROCESSES
CRACKING HYDROCARBON OILS
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE
FUELS
FURNACES
HEATING
KILNS
LIGHTING
LUBRICANTS
MECHANICAL ENGINEERING
METALLURGY
MINERAL WAXES
OVENS
PEAT
PERFORMING OPERATIONS
PETROLEUM, GAS OR COKE INDUSTRIES
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION
RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES
REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS
REFORMING OF NAPHTHA
REGULATING OR CONTROLLING COMBUSTION
RETORTS
SEPARATION
TECHNICAL GASES CONTAINING CARBON MONOXIDE
TRANSPORTING
WEAPONS
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Summary:The method and the appliance employ at least two parallel coiled pipes (2, 3, 4, 5); the material stream to be heated and/or to be evaporated flows via the coiled pipes in divided form. The temperature Ti of the material stream is measured at the end of each coiled pipe i (13, 14, 15, 16) and the mean value is calculated (29), where n denotes the number of coiled pipes. Each of the temperature differences T-Ti (34, 33, 32, 31) is used to generate a signal which controls the material flow (17, 18, 19, 20) through the coiled pipes (2, 3, 4, 5) in question in such a way (25+9, 26+10, 27+11, 28+12), that the temperature difference T-Ti decreases. The highest temperature Timax of all the temperatures Ti is employed to calculate the difference Timax-Ts (30), where Ts denotes the temperature set point of the overall material stream leaving the oven. The calculated difference Timax-Ts (35) is used to generate a signal which controls (23) the generation of heat in the oven in such a way that said temperature difference decreases.
Bibliography:Application Number: AU19770027814