Abstract Given the failure and cracking of elbow superheater tube a quick-start boiler, macroscopic, chemical composition, metallographic, microhardness tests were carried out on failed samples, reasons analyzed. The results show that reason is material state pipe not good, stress condition complex, at high level, inner wall produces intergranular during operation, which leads to rupture.

In a fertilizer plant, the steam boiler is the most important component. In order to keep the plant operating in the effective mode, the boiler efficiency must be observed continuously by several operators. When the trend of the boiler efficiency is going down, they may adjust the controlling parameters of the boiler to increase its efficiency. Since manual operation usually leads to unexpected...

The aim of this study is to investigate the boiler tube failure mechanism using finite element analysis and experimental Analysis. numerical software used ANSYS steady-state thermal static structural analysis. independent variable for temperature from flue gas wall thickness tube. scope determine distribution, von mises stress, deformation safety factor by implemented design experiment. materia...

The purpose of this work is to develop a reasonably detailed dynamic model of a Lurgitype industrial methanol synthesis reactor so as to determine important simplifications, to identify application/operating model limits, and to preliminary check the feasibility for the Nonlinear Model Predictive Control (NMPC) methodology. To do so, a Partially Differential Equation (PDE) system is formulated ...

Over a decade, coal-based thermal power plants are upgraded to operate at supercritical pressure conditions due its high efficiency and low emissions. Water wall panels of typical boiler structured spirally in the lower furnace vertically placed upper furnace. The spiral tubes inclined 19 22 degrees which fluid behaves as horizontal tubes. design water plays key role designing boiler. present w...