The Intensity Examination And Analysis Of Flow And Temperature Field For The Bayonet Heat Exchanger

In this thesis, conduct in-depth research on several key problems for the first waste heat recovery with an annual output of300000tons of synthetic ammonia device in the main heat exchanger design technology level.They are can be listed as follows.Firstly, the process design of the bayonet heat exchanger has been conducted according to the design conditions. We have determined the design parameters and complished the process calculation and checking by hand computation and HTRI software.Secondly, the fluid-induced vibration of the bundle of the bayonet heat exchanger has been conducted according to actual conditions, and the HTRI software has been used to recalculate and check. The results show that the bayonet heat exchanger under the design condition meets the standard.Thirdly, ANSYS software has been used to3D finite element analysis of the exchanger in different boundary conditions, and the stress intensity checking has been conducted according to the JB4732-1995(Steel pressure Vessels——Design by analysis).Finally, Fluent software has been used to establish fluid-solid coupled heat transfer model, compared comprehensively in the heat capacity and heat pipe stress for heat transfer under various working conditions.The design and check of first heat exchanger in the synthetic ammonia plant have been accomplished in this thesis, which are based on the studies of the key problems of the heat exchanger. These results could provide a strong theoretical basis for design and application of heat exchanger of similar bayonet type.