The thermal stress analysis of the inlet tube box utilizes the already-obtained temperature field for further stress analysis. The load was applied according to the process conditions and the model was solved to obtain the thermal expansion and maximum thermal stress of the model in all directions. The amount of x-direction expansion was not taken into account because the existence of expansion joints on the chiller barrel allowed for a certain amount of expansion, and the results showed that the expansion joint in the x-direction was completely absorbed. The lining chrome corundum is basically the same as the expansion of the shell, but the maximum thermal stress is far greater than the allowable stress of the material, which will lead to deformation of the shell and cracking of the liner. Based on the analysis of the temperature distribution and thermal stress analysis results obtained by thermal analysis, due to the excessive temperature difference between the inner and outer walls, the inner liner is in a high-temperature environment and thermal expansion occurs, but the shell material is in a relatively low temperature environment, and the thermal expansion amount is not significant. Big. This results in the lining material being constrained by the shell material during the thermal expansion process, and at the same time, due to the large thermal stress, the shell material is forced to expand to generate a great stress. This situation is absolutely not allowed in actual operation, so solutions must be proposed.
The inlet tube box and lining chrome corundum structure optimization The thermal stress in the high-temperature chiller liner is generally divided into mechanical thermal stress and temperature gradient stress. This article will optimize from these two aspects, in order to reduce the thermal stress generated during the operation of chrome corundum casting liner and shell. Optimization of Mechanical Thermal Stress Reduction In many high temperature equipment, in order to reduce the mechanical thermal stress on the refractory material and the expansion force of the shell, the expansion gap is usually reserved when the refractory material is poured, so that the refractory lining is in the expansion value. Reach each other when reaching the reserved expansion gap. The size of the expansion gap is very important, too small to achieve the effect of adjusting the stress; too large, it may make the inner liner structure unstable or make the high temperature medium penetrate into the inner liner. In view of the problem of excessive thermal stress in the tube box and the liner, the amount of expansion of the refractory material is taken into consideration in the casting of the alumina lining, so that the lining chrome corundum exists in a block form.
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