Based on the technical scheme design of high temperature flue gas tubes of a 1021 t/h pulverized coal-fired utility boiler the author gives an analysis of the causes of the cited boiler tube failures during boiler operation,discusses the design philosophy of the modification scheme and proposes a new type of high temperature boiler flue gas tube construction.

Structure design of thermal insulation for high temperature furnace flue gas pipeline and its application

Then the high temperature gas-tube boiler which has a good efficiency of saving energy together with its low equipment investment was proposed,this new equipment has been successfully used in 120×104 t residue catalytic cracking unit in a refinery.

Chlorine in tantalum-niobium composite is determined through heating and distillation with high-temperature tubular furnace and silver chloride turbidimetry.