Piece of piping through which waste gas flows of a system of...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 55/07 (2006.01) F16L 39/00 (2006.01) F16L 55/24 (2006.01)

Patent

CA 2269714

A piece of piping (1) includes an outer pipe (3) and an inner pipe (2). The outer pipe (3) consists of a stable material impermeable to liquids. The inner pipe (2) that carries waste gas is made of a sintered material, preferably plastic, metal or ceramic, and is permeable to the liquid (9) as a function of a pressure difference between the space (8) between the pipes and the inner space (20), but is essentially impermeable to liquid when the pressure is equal. The space (8) between the inner pipe (2) and the outer pipe (3) is filled with the liquid (9). If a pressure is exerted on the liquid (9) in the cavity (8), the liquid (9) permeates through the three-dimensional system of pores of the inner pipe's wall, controlled by the pressure, and wets the inside of the inner pipe's wall evenly. If the pressure is increased still further, the liquid (9) begins to drip into the inner pipe (2). The system of pipes comprises at least one piece of piping through which waste gas flows. It prevents deposits and caking on the inside walls of the pipes by wetting these with liquid (9). A drop removal facility (23) with a drop collection space (24) prevents the liquid (9) flowing backwards by dripping down.

L'invention concerne un tuyau (1) comprenant un tube extérieur (3) et un tube intérieur (2). Le tube extérieur (3) est constitué d'un matériau stable imperméable aux liquides. Le tube intérieur (2), qui conduit l'effluent gazeux, est constitué d'un matériau fritté, de préférence de plastique, de métal ou de céramique, et est perméable au liquide (9) en fonction d'une différence de pression entre l'espace (8) compris entre lesdits tubes et l'espace intérieur (20), mais il est sensiblement imperméable au liquide lorsqu'il n'y a pas de différence de pression. L'espace (8) compris entre le tube intérieur (2) et le tube extérieur (3) est rempli de liquide (9). Si une pression est exercée sur le liquide (9) se trouvant dans l'espace (8), ledit liquide (9) passe à travers le système tridimensionnel de pores de la paroi du tube intérieur, de façon contrôlée par la pression, et mouille le côté intérieur de la paroi du tube intérieur uniformément. Si la pression est encore augmentée, le liquide (9) commence à goutter dans le tube intérieur (2). Le système de tuyaux comprend au moins un tuyau traversé par l'effluent gazeux. Il empêche les dépôts et l'agglomération de matière sur les parois intérieures des tuyaux en mouillant celles-ci avec du liquide (9). Un dispositif d'évacuation des gouttes (23) comprenant un espace collecteur de gouttes (24) empêche un reflux du liquide (9) par égouttement vers le bas.

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