摘要:
An enclosure in which there circulates a moving bed of solid particles (for example a moving-bed catalytic reactor such as a reforming reactor), is delimited in the enclosure by at least one grill. In the enclosure a fluid passes through the bed in a direction different from that of the flow of the assembly of the particles and issues from the bed by way of at least one grill. Disposed in the thickness of said bed in an intermediate wall (grill) such as to distribute the thrust forces produced by the fluid on the particles in the zones of the bed which are delimited in that way. Jamming of the particles against the grill or grills is greatly reduced and the admissible fluid flow rate is then decreased.
摘要:
A chamber comprising a moving bed of solid particles, delimited by at least one screen with thickness e, circulating in a downward direction substantially parallel to the screen, the bed being traversed by at least one fluid flowing in the bed in a principal direction which is different to that of the ensemble of particles and leaving the bed by an outlet screen. In accordance with the invention, the chamber comprises at least one opening for introducing solid particles located above the bed and comprising at least one orifice for the flow of the particles, located at a distance of at least 0.6 e from the outlet screen. The chamber advantageously comprises at least two extraction openings, one extraction opening being located at a distance not more than 0.5 e from the outlet screen, and the other at a distance of at least 0.5 e from the outlet screen. The invention is applicable to catalytic reactors, in particular to catalytic reforming reactors.
摘要:
The invention provides an apparatus for carrying out chemical reactions, in the presence of at least one catalyst, in at least one reaction zone equipped with heat exchanger plates which make it possible to control the temperature of the zone. The apparatus mainly comprises a reactor, at least one central distributor manifold, a plurality of distributor manifolds, at least one central receiver manifold, a plurality of receiver manifolds and a plurality of continuous and elongate hollow plates, preferably substantially perpendicular. The hollow plates can contain adjacent channels having one of the following shapes: square, rectangular, triangular, sinusoidal.
摘要:
The invention relates to an apparatus for carrying out chemical reactions in the presence of at least one catalyst, in at least one reaction zone equipped with heat exchanger plates allowing the temperature of the zone to be controlled. The apparatus mainly comprises a reactor (1), at least one central distributing manifold (6.1a), a plurality of distributing manifolds (6.2a), at least one central receiving manifold (6.5a), a plurality of receiving manifolds (6.4a), a plurality of connecting manifolds (6.6a) and a plurality of hollow, continuous, elongate plates (6.3a), each divided into two hollow half panels (6.3, 1a and 6.3, 2a). The plates are preferably substantially parallelepipedic and may contain adjacent channels having one of the following forms: square, rectangular, triangular, or sinusoidal.
摘要:
An apparatus is provided for concentrating fine or broken particles to separate a particle stream into at least one stream which is concentrated in fine or broken particles and at least one stream with a reduced concentration of fine or broken particles. In addition to introduction and extraction structure, the apparatus includes at least two separator stages each comprising at least one funnel with an inclined or substantially vertical axis which opens upwardly, located beneath an inlet to collect the particles. The funnel is connected to at least one deflector which is directed downwardly to allow particles to flow under gravity and to form a bank of particles at the level of the funnel.
摘要:
Liquid and gas materials are reacted in the presence of a catalyst in a reactor of the dispersed bed type which comprises a plurality of superposed chambers through which the catalyst progressively drops, its rate of transfer from one chamber to another being controlled by injecting an auxiliary fluid into downcomers through which the catalyst is forced to pass.
摘要:
The invention relates to a process and to an apparatus for effecting chemical syntheses in gaseous phase, under pressure, in the presence of a solid catalyst, for instance for ammonia synthesis from hydrogen and nitrogen or for the synthesis of methanol or higher homolog alcohols from hydrogen and at least one carbon oxide.The reactor of substantially cylindrical shape contains a plurality of elongate compartments of parallelipiped shape, adjacent to each other, the adjacent walls of the compartments or the common walls of the adjacent compartments being gas-tight walls, said tight walls forming hollow plates wherein are provided channels for the flow of a fluid heat carrier flowing through said walls under a pressure substantially equal to the pressure to which are subjected the reaction gases.
摘要:
A process for converting liquid or semi-liquid hydrocarbon charges to lighter fractions comprises a first step (a) heating droplets jets of the charge introduced into a pyrolysis chamber by surrounding them with parallel jets of hot solid particles, of relatively large size, of a heat carrier material, not substantially in contact with the droplet jets, so as to maintain a temperature of 700.degree.-1600.degree. C., and introducing a gas so as to obtain a pressure from 1 to 150 bars. A second step involves (b) separating the gaseous fraction from the solid particles. Thereafter (c) at least a portion of the solid particles are heated and fed back to step (a). The gaseous fraction is (d) cooled by means of a cold gas so as to recover light hydrocarbons therefrom.
摘要:
The device repeatedly samples a selected amount of liquid mixture and separates at least one liquid phase from the mixture. The amount of the separated liquid phase is plotted versus the corresponding amount of the sampled mixture. At least some of the sample is recycled.
摘要:
A process for the synthesis of essentially linear saturated C.sub.5.sup.+ hydrocarbons from a gas phase comprising synthesis gas is described. The process comprises circulation of an inert liquid phase and said gas phase in a reaction zone, in which the reaction zone is provided with at least one means for introducing gas and liquid phases, and at least one means for extracting the hydrocarbon phase formed by the Fischer-Tropsch reaction, and characterized in that the reaction zone comprises at least one mixing means. Preferably, at least one mixing means is a static mixer. An apparatus for carrying out the described process is also described.