Flue gas conditioning system for intermittently energized...

B - Operations – Transporting – 03 – C

Patent

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B03C 3/013 (2006.01) B03C 3/68 (2006.01)

Patent

CA 2189878

A system for preconditioning flue gas to be treated in an electrostatic precipitator having a set of electrostatic elements and a power supply, which supplies an intermittent power to the electrostatic elements, includes a source of a conditioning agent, and a current sensor and a voltage sensor for detecting the half-cycle current and voltage supplied to the electrostatic elements. The system also includes a power measuring circuit, responsive to the current sensor and to the voltage sensor, which develops an indication of the power supplied to the electrostatic elements and a controller, responsive to the power indication, which controls the amount of conditioning agent added to the flue gas in order to maintain the power at a substantially predetermined level.

L'invention concerne un système pour préconditionner les gaz de fumée dans un séparateur électrostatique comprenant un ensemble d'éléments électrostatiques et une alimentation électrique, qui fournit un courant intermittent aux éléments électrostatiques. Ce système comporte une source d'un agent de conditionnement, un capteur de courant et un capteur de tension pour détecter le courant de demi-période et la tension fournis aux éléments électrostatiques. Ce système comprend, également, un circuit de mesure du courant, agissant en réponse aux capteurs de courant et de tension, pour indiquer le courant fourni aux éléments électrostatiques. Il possède aussi un contrôleur, agissant en réponse à l'indication de puissance pour contrôler la quantité d'agent de conditionnement ajouté au gaz de fumée pour maintenir le courant à un niveau sensiblement prédéterminé.

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