Research On Numerical Simulation And Structural Optimization To The Gun Body Of Sulfur Spray Gun

Sulfur spray gun is the key to the sulphuric acid process device,directly affecting the production and quality of sulfuric acid.Jacketed structure,which is commonly used for thermal insulation in a sulfur spray gun,is an important assurance for transportation and spraying of the liquid sulfur.According to the characteristics of the sulfur spray gun,we have a study of simulation optimization from two aspects of heat transfer effect and stress analysis of the spray gun's structures,which is based on the heat fluid-solid coupling theory,applying ANSYS numerical simulation technique.With the goal of the uniform temperature distribution of the entire gun,we optimized the structure of the insulation jacket of the Sulfur spray gun and have a heat transfer simulation of it.And we applied simulation analysis for the steam in and out from both sides single-jacketed structure and the steam in and out from the same side double-jacketed structure,based on the steam in and out from the same side single-jacketed structure which is commonly used.In the software environment of FLUENT,the inlet of the steam was based on saturated vapor and liquid sulfur mass flux,and the pressure outlet was adopted.Standard no-slip wall was applied in it,the k-omega turbulence model being adopted as well as the energy equation.The pressure and velocity coupling equation was used for solving,PISO algorithm being applied as well.With the simulating,the symmetry plane temperature distribution nephogram of the gun body fluid domain and the temperature distribution nephogram of the gun tube wall in three different jacketed structures could be found.Comparative analysis shows the thermal uniformity of the steam in and out from both sides single-jacketed structure is significantly better than the steam in and out from the same side single-jacketed structure.But the steam in and out from the same side double-jacketed structure is a kind of optimization of the spray gun which has a better thermal uniformity and satisfies the technological requirement of steam in and out from the same side simultaneously.Taking a certain type of the steam in and out from the same side double-jacketed structure for example,the stress analysis was carried out on the gun.In the ANSYS Workbench environment,with the gun body modeling and meshing,we respectively imported the role of fluid pressure load and temperature load into the solid region of the gun based on the uniflow solid coupling,then the stress,strain and displacement nephogram of the solid region could be obtained with the simulative calculation.Analysis shows that the stress distribution of the gun's surface is uniform.And its maximum stress is far lower than the allowable stress.Meanwhile,the overall deformation of the gun is small enough to meet the requirements of strength and stiffness.