Research on corrosion of air preheater of biomass fueldirectly fired boiler

Abstract

Abstract: Abstract:The reasons of corrosion of the air preheater heat exchange tube bundle of a biomass fueldirectly fired boiler were analyzed, and it was determined that the air preheater's corrosion is caused by the low dewpoint acid corrosion and the alkali metal deposit corrosion. The air preheater heat exchange tubes had been replaced by enamel tubes. Then the air preheater operates in good condition for a long term, the hot air temperature is much higher than design value, and the enamel tubes do not corrode basically. The comprehensive service live of the enamel tube is much longer than the service live of original steel tube. The economic efficiency of the unit was improved.

Key words: Keywords:biomass, boiler, air preheater, heat exchange tube, corrosion, enamel tube

JIA Shaogang1, WANG Dingcai2, DING Heng2, GUO Junhai3. Research on corrosion of air preheater of biomass fueldirectly fired boiler[J]. Huadian Technology, 2014, 36(8): 70-72.

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Research on corrosion of air preheater of biomass fueldirectly fired boiler

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