Identification of damages zones of transfer line exchanger based on modeling

Abstract

Abstract The task was set to simulate a quenching and evaporation apparatus in a software package based on operational and technical documentation, considering the structural and operational characteristics, as well as modeling the thermo-force effect and identifying the most loaded zones of the structure. For research, the most common exploited design of the quenching-evaporation apparatus of the “pipe in pipe” type was chosen, consisting of a welded elbow, an external pipe 325x14 mm, an internal pipe 168x13 mm, conical eccentric transitions 300/100 mm and fittings. Materials of structural elements of the quenching and evaporation apparatus are steel 20 and steel 20X23H18. The apparatus is mounted on supports. Technologically, the quenching and evaporation apparatus is installed on the metalwork and at the outlet of the pyrolysis furnace and connected to the food coil. The authors conducted a thermo-power simulation of the quenching and evaporation apparatus considering operating conditions using the APM FEM system for solving engineering and research problems integrated into the COMPASS-3D computer-aided design system. It is proposed to use the calculation model and the obtained stress-strain state to identify the most loaded zones of the structural elements of the quenching and evaporation apparatus. It is proposed to use the results obtained in modeling the combined action of temperature loads and pressure to identify damage zones in structural elements. It is shown that in zones with the most dangerous stress-strain state, defects occur and localize in the form of thinning of the wall.