Abrégé

The present invention relates to a system and a method to reduce variations of the flow of soot blowing steam in a boiler (8) with a soot blowing system which comprises a plurality of soot blowers (1, 1) working with steam, which are operated in a sequence after each other, as well as control means for controlling the soot blowers and the ejection of steam through them (1, 1'), wherein a central, computerized control system (71) is arranged to control the start (3, 3') based on individual programmed values (11,13, 11 ', 13') for the individual soot blowers, or groups thereof, in such a way that the steam consumption (100) as far as possible is kept at a predetermined level at the exchange from a soot blower (1), or group, to the next soot blower (1'), or group,

Classes IPC  ?

• F23J 3/02 - Nettoyage des tubes de foyerNettoyage des carneaux ou cheminées
• F28G 15/04 - Dispositions pour l'alimentation ou l'entraînement, p. ex. par force motrice
• F28G 1/16 - Accessoires non rotatifs, p. ex. alternatifs utilisant des jets de fluide pour enlever les débris

Abrégé

The present invention relates to a method for measuring the conditions inside a power boiler wherein a sootblower is used as a measuring probe. The invention also relates to a system for measuring the conditions in a power boiler, comprising a control unit, at least one sensor and a measuring probe placed inside said furnace, wherein said probe is arranged on a soot blower.

Classes IPC  ?

• F27D 21/00 - Aménagement des dispositifs de surveillanceAménagement des dispositifs de sécurité
• F22B 37/38 - Détermination ou signalisation des conditions de marche dans les chaudières à vapeur, p. ex. enregistrant la direction ou le débit du courant d'eau dans les tubes
• F28G 1/16 - Accessoires non rotatifs, p. ex. alternatifs utilisant des jets de fluide pour enlever les débris
• F28G 3/16 - Accessoires rotatifs utilisant des jets de fluide pour enlever les débris

Abrégé

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.

Classes IPC  ?

• F28G 1/16 - Accessoires non rotatifs, p. ex. alternatifs utilisant des jets de fluide pour enlever les débris
• F23J 3/02 - Nettoyage des tubes de foyerNettoyage des carneaux ou cheminées
• F28G 15/04 - Dispositions pour l'alimentation ou l'entraînement, p. ex. par force motrice