PROCESS FOR CLEANING SUPERHEATERS AND OTHER HEAT-TRANSFERRING SURFACES IN RECOVERY BOILERS

摘要

The invention relates to a process for removing a heavy deposit, which is entirely or partially sintered, from superheaters and other heat-transferring surfaces in recovery boilers and other boilers by means of so-called soot blowing during operation which is amplified by thermal shedding. The process is characterized in that the pressure in the soot blower is at most 80 %, preferably 50 % , of the normal pressure (which is 20-25 bar), in that the cooling effect of the soot blowing medium is regulated by means of water injection and in that the blowing time is at least 1 minute for each pipe unit (screen).