METHOD AND ARRANGEMENT FOR REDUCING VARIATIONS IN SOOT BLOWING STEAM FLOW IN A BOILER

摘要

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,