Research on the Mechanism and Preventive Measures of Heat Transfer and Coking in Boilers

Abstract

Boilers are one of the most important power supply sources in the chemical industry. The irreplaceable nature of its products requires boilers to maintain stable long-cycle operation during the production process. However, boiler failures occur from time to time and necessary measures need to be taken to reduce the chances of failure. Among these failures, metal corrosion and tube failures are particularly prominent. Due to the fact that the thermal calculation results do not match the actual; the coefficients in the design are not reasonably selected, and the hearth and boiler shape are not properly selected; the structural design of the superheater system and the arrangement of the heated surface are not reasonable; and the wall temperature calculation method is not perfect, which leads to the improper selection of materials and so on. These will make the fire-side heat exchange system produce wall temperature super-high, tube bundle burst and other failure phenomena. These phenomena cause a certain degree of hidden danger to the safe production of the boiler.