Theoretical And Experimental Researches On Sootblowing Optimization Of Large Capacity Utility Boiler

The dissertation investigated Zouxian Power Plant of 330MW boiler andanalyzed the formation, characteristics, existence and harm of fouling andslagging on boiler. The advantage and disadvantage of sootblowing modes, suchas steam, shock wave and sound wave, were introduced. Furthermore, theirbenefits were quantitatively analyzed and compared. It reaches the conclusion thatthe synthesis benefit of steam mode is remarkable. Based on the on-line slaggingmonitoring system of heating surfaces in #2 boiler, experiments of influencingrule among furnace short blowing and fluctuation burden and sootblowing ofheating surface, and pollution level of fouling on the heating surface were carriedout. The income and cost of sootblowing on the heating surface of #2 boilers werecompletely analyzed. It was also emphasized that the reduce in the temperature ofexhaust smoke can lead to improve the efficiency of boiler while the increase inreheat steam temperature can make the efficiency of the whole plant increased.Based on the income and cost of sootblowing and principle of fuzzingmathematics, the optimum sootblowing model of the fuzzy comprehensiveassessment method was built and its example has been taken.