Institut Francais Du Pe'trole

Institute Francais Du Petrole

Yves Gougne

Eric Lenglet

Jean-Pierre Burzynski

Roland Huin

G&eacute;rard Courteheuse

Christian R Busson

Jacques Alagy

Paul Broutin

Jerome Weill

Gerard Courteheuse

A steam-cracking unit comprises at least one multitube quenching exchanger, equipped with a non-obstructive impact separator for preventing the erosion of the tubular input plate. The impact separator is at least 50% opaque when viewed from transfer pipe. It is arranged inside of an input cone in such a way that there is free passage of at least 40 mm between the periphery of the impact separator and the cone.

Steam cracking installation with means for protection against erosion

A steam-cracking process includes the injection, at at least one point upstream from a secondary quenching indirect exchanger (,), of particles with a mean size of between 0.02 and 4 mm, at a velocity speed in the exchanger of 20 to 180 m/s, in sufficient quantity to limit the rise in the output temperature of the effluents from the exchanger to a value that is less than 100&deg; C. per month. At least 70% by weight of the quantity of injected particles is introduced downstream from primary quenching exchangers (,) and upstream from the inlet to the secondary quenching exchanger. At intervals, decoking of the pyrolysis pipes and primary quenching exchangers is carried out in the presence of air.

Method and device for steam cracking comprising the injection of particles upstream of a secondary quenching exchanger

Steam cracking installation and method with single controlled injection

An oxidation reactor having elongated shape includes in combination, a mixing member including a pipe for feeding oxidizing gas and a pipe for feeding oxidizable charge; a reaction member, arranged subjacent the mixing member, and a discharge member associated with a discharge pipe for the products of the reaction. The reaction member includes a central zone which has a first lining and the reactor includes at least one peripheral zone which has a second lining, passages in the second lining being smaller than passages in the first lining so that the pressure loss in the second lining is greater than that of the first lining. The second lining forms a sleeve surround the first lining and this sleeve is formed of at least one refractory heat insulating material. The oxidation reactor is provided with an external sleeve steel jacket, a concrete wall and a steel element surrounding the mixing member arranged above the reaction member. The reaction member includes a series of single elements which form juxtaposed channels.

Method and reactor for oxidation with a pressure drop differential, and

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Givors, France

Yves Gougne