ALUMINA FORMADORA DE TUBO BIMETÁLICO PARA FORNOS DE PROCESSO DE REFINARIA E MÉTODO DE PRODUÇÃO E USO

• Main Authors: JAMES E. FEATHER, CHANGMIN CHUN, BRENDA ANNE RAICH, DAVID SAMUEL DEUTSCH, VANCE A. MCCRAY
• Format: Patent
• Language: Portuguese
• Published: 22.08.2017
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CRACKING HYDROCARBON OILS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINEERING ELEMENTS AND UNITS; FUELS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; JOINTS OR FITTINGS FOR PIPES; LIGHTING; LUBRICANTS; MACHINE TOOLS; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PIPES; 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; SOLDERING OR UNSOLDERING; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

ALUMINA FORMADORA DE TUBO BIMETÁLICO PARA FORNOS DE PROCESSO DE REFINARIA E MÉTODO DE PRODUÇÃO E USO. É provido um tubo bimetálico para transporte de estoques de provisão de hidrocarbonetos em fornos de processo de refinaria e, mais particularmente, em serpentinas radiantes de forno, incluindo: i) uma camada de tubo externa sendo formada de aços inoxidáveis, incluindo cromo na faixa de 15,0 a 26,0 % em peso com base no peso total de aço inoxidável, ii) uma camada de tubo interna sendo formada de uma liga em massa formadora de alumina, incluindo 5,0 a 10,0 % em peso de Al, 20,0 % em peso a 25 % em peso de Cr, menos do que 0,4 % em peso de Si, e pelo menos 35,0 % em peso de Fe, com o resto sendo Ni, em que a camada de tubo interna é formada por soldagem de pó de plasma da liga em massa formadora de alumina sobre a superfície interna da camada de tubo externa, e iii) uma camada de óxido formada na superfície da camada de tubo interna, em que a camada de óxido é substancialmente compreendida de alumina, óxido de cromo, sílica, mulita, espinélios, ou suas misturas. Também são providos métodos de produzir e utilizar o tubo bimetálico. Provided is a bimetallic tube for transport of hydrocarbon feedstocks in refinery process furnaces, and more particularly in furnace radiant coils, including: i) an outer tube layer being formed from stainless steels including chromium in the range of 15.0 to 26.0 wt.% based on the total weight of the stainless steel; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt.% of Al, 20.0 wt.% to 25.0 wt.% Cr, less than 0.4 wt.% Si, and at least 35.0 wt.% Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof. Also provided are methods of making and using the bimetallic tube.