A method of rebuilding a sootblowing system of a recovery...

F - Mech Eng,Light,Heat,Weapons – 28 – G

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Details

F28G 1/16 (2006.01) F23J 3/02 (2006.01) F28G 15/04 (2006.01)

Patent

CA 2667185

This invention relates to a method of rebuilding a sootblowing system of a recovery furnace, said sootblowing system including a plurality of sootblowers (1), and each sootblower (1) including a frame (10), a moveable carriage (14) supported by the frame (10), a motor (2) for moving the carriage (14), a lance tube (11) mounted on the carriage (14) to be insertable into and retractable from the recovery furnace (8), said lance tube (11) having at least one nozzle (12), and a steam feed tube (45, 35, 15) connected to the lance tube (11) for feeding sootblowing steam to be ejected through said at least one nozzle (12) into the recovery furnace, said steam feed tube (45, 35, 15) having a first valve (3) arranged to admit steam through said at least one nozzle (12) only when the carriage with the lance tube (11) is in an activated position, i.e. during retraction and introduction of the lance tube (11), wherein further providing means (4, 30) to arrange for controlled steam supply merely during a limited time period, e.g. merely during introduction.

Cette invention concerne un procédé de reconstruction d'un système de soufflage de suie d'une chaudière de récupération, ledit système de soufflage de suie comprenant une pluralité de souffleurs de suie (1), et chaque souffleur de suie (1) comprenant un cadre (10), un chariot mobile (14) supporté par le cadre (10), un moteur (2) pour déplacer le chariot (14), un tube de lance (11) monté sur le chariot (14) qui peut être introduit dans, et retiré de, la chaudière de récupération (8), ledit tube de lance (11) ayant au moins une buse (12) et un tube d'alimentation en vapeur (45, 35, 15) relié au tube de lance (11) pour une alimentation en vapeur de soufflage de suie afin qu'elle soit éjectée à travers ladite ou lesdites buses (12) dans la chaudière de récupération, ledit tube d'alimentation en vapeur (45, 35, 15) ayant une première soupape (3) agencée pour admettre la vapeur à travers ladite ou lesdites buses (12) seulement lorsque le chariot avec le tube de lance (11) est dans une position activée, à savoir pendant la rétraction et l'introduction du tube de lance (11). Le procédé comprend en outre des moyens (4, 30) pour obtenir une alimentation en vapeur commandée seulement pendant une période de temps limitée, par exemple seulement pendant l'introduction.

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