Abstract:
Un aparato de intercambio de calor y proceso, particularmente un reformacion primaria de intercambio de calor con el gas reformado primario que está sometido a combustion parcial (y opcionalmente reformacion secundaria) y el gas parcialmente de combustion resultante que está utilizado como el medio de intercambio de calor para suministrar calor requerido para la reformacion primaria. El aparato incluye zonas de entrada de fluido de proceso (11) y de salida (14) separadas de la zona (13) de intercambio de calor a través de medios de límite tales como láminas de tubo (15, 16, 17) o tuberías colectoras (35). Una pluralidad de tubos (19) de intercambio de calor para un fluido de proceso, extendiéndose a través de la zona (13) de intercambio de calor desde uno de los medios de límite (15, 16) y acoplando deslizablemente en los otros medios de límite (17) con los tubos de sello (26) sujetados a los otros medios de límite (17). El interior de la parte interna del tubo de sello (26) y su tubo (19) de intercambio de calor asociado está proporcionado con una constriccion (31) de área transversal reducida formando una region de baja presion (32) corriente abajo de la constriccion, una region (33) de expansion de área transversal mayor que aquella de la constriccion (31) corriente abajo de la misma, y uno o más pasajes (34) a través de la pared de aquel tubo interno conectando la region baja presion al exterior del tubo interno. Los pasajes (34) están ubicados dentro de la region traslapante del tubo de sello (26) y el tubo (19) de intercambio de calor con el fin de proporcionar una trayectoria de flujo de fuga para el medio de intercambio de calor desde la zona de intercambio de calor, a través de la region traslapante y los pasajes, hacia la region de baja presion.
Abstract:
Reactor comprising a verically extending vessel (2) provided with a plurality of parallel tubes (8) adapted for being filled with catalyst material and substantially vertically extending between an upper tube plate (10) and a lower tube plate (9), means (12, 13) for circulating a heat transfer medium between the tube plates (9, 10) along the tubes (8), inlet means (3, 17, 18) above the tubes (8) for distributing liquid in the form of one or more sprays and gas over the plurality of tubes (8) and outlet means (4, 20) below the plurality of tubes (8) for removal of liquid and gas from the ' vessel (2), wherein the plurality of tubes (8) are arranged in rows such that the tubes of adjacent rows are staggered, and wherein the upper tube plate (10) is provided with holes (15), having a lower part in which the tubes (8) are closely fitted and having a substantially concentric upper part diverging in upward direction, the upper ends of adjacent holes having edges in common in such a manner that the upper end of the upper tube plate (10) is formed by edges (16) arranged in a hexagonal configuration. The invention further relates to a process for the preparation of hydrocarbons using such reactor.
Abstract:
In a multitube reactor gas and liquid are allowed to pass through reactor tubes (2) effluents are removed from the lower ends (9) of the reactor tubes (2), and heat-exchange fluid is passed along the outer surfaces of the reactor tubes (2). To obtain a uniform distribution of liquid to the upper ends (4) of the reactor tubes (2), the liquid is supplied to a plurality of adjacent trays (18) which are in fluid communication with the reactor tubes (2).
Abstract:
A multi-tubular fired reactor for endothermic catalytic reactions is described including a furnace whose firebox is divided into a series of zones, each of which has its own individually controllable burner system. At any given moment a majority of the tubes can be "on line" whilst a minority are in the course of reactivation. By sequentially switching the zones from "on line" status to reactivation and vice versa, a substantially constant product composition can be maintained in a common outlet product collection system to which all the tubes are connected.
Abstract:
The invention concerns a method and a reactor for carrying out endothermic, in particular catalytic, reactions. The reactor consists of one or more vertical catalysis tubes (1), each with a catalyser layer (6) having an annular cross-section and with an inlet at the top (2) for the product to be processed and a coaxially disposed cylindrical outlet line (3), leading from the bottom to the top, for the processed product. The catalysis tubes (1) are surrounded by cylindrical thermal jackets (7) also disposed coaxially, part of each jacket being housed in a heating chamber (8), made of refractory material, in which the combustion gases from the output lines (12) of an externally located adiabatic burner pass down from the top to the bottom over the outside surface of the thermal jacket (7), subsequently passing through external lines (9) into the top of the heating chamber (8) where they flow down through the interior of the thermal jacket, passing over the outside surface of the catalysis tubes (1) and thus exchanging heat, in parallel flow, both with the reaction products in the catalysis tubes (1) and with the hot combustion gases which have just entered the heating chambe (8).
Abstract:
The invention relates to a catalyst pipe for an endothermal catalytic reaction of a process medium, with an outer casing pipe (1) with its faces sealed by a first (2) and a second base (3). Inside the casing pipe there is an ascending tube device which is connected near the first base to an outwardly directed line (4) for the product resulting from the catalysis of the process medium. According to the invention, the ascending tube device takes the form of a plurality of tube bunches (10) ending in a manifold (13) connected to the outlet (4) for the product.