RTO High Temperature Valve Structure Optimization And Parameterization Platform Development

Regenerative combustion furnaces(RTO)mainly deals with volatile organic compounds(VOCS)high temperature oxidative combustion reactions.In order to reduce the waste of energy,it is necessary to recycle the heat after exhaust gas treatment.Meanwhile,the high temperature valve,as a key component in the heat recovery system,plays a vital role in the control of RTO reaction waste heat.In addition,different specifications of RTO need to be equipped with high temperature valves of different calibers which can be achieved fast opening and closing in a high temperature environment of 800?.Thus,it is not only necessary to ensure that the high temperature valve has good characteristics,such as,good flow performance,small thermal deformation,strong impact resistance,and other characteristics,but also to improve the drawing efficiency of the high temperature valve.Given above,the research are as follows:(1)The fluent software was used to carry out finite element calculation for high temperature valve at different openings,the pressure cloud diagram,velocity cloud diagram,and track diagram of the high temperature valve at various angles,and the flow resistance characteristic curve of the high temperature valve and flow characteristic curve was calculated.The simulation results showed that there was a large vortex on the leeward surface of the valve plate when the high temperature valve was opened at a small angle,which increased the pressure loss,and thus increased the flow resistance coefficient and reduced the flow coefficient of the high temperature valve.Based on the above results,the structure of the high temperature valve was preliminarily improved,and the improved high temperature valve was simulated under the same boundary conditions.The results showed that the flow resistance coefficient of high temperature valve was reduced,the flow coefficient was increased,and the flow capacity was improved.(2)It is necessary to study the deformation of the high temperature valve under the temperature load since the valve works in the high temperature environment for a long time.In this study,the method of thermal-structure coupling was used to simulate the high temperature valve,and the deformation data under actual working conditions were measured on a test bench.We found that the simulation data were highly consistent with the experimental data,which proved the rationality of the simulation parameter settings.Moreover,and the deformation of the improved high-temperature valve under the same boundary conditions was simulated and calculated.The results demonstrated that the thermal deformation of the improved high temperature valve was obviously reduced and the blocking phenomenon of the high temperature valve under working conditions was basically eliminated.(3)In the case of emergency heat exchange,the valve plate needs to close quickly.The moment of closing the valve plate will have a great impact on the seat.Therefore,LS-DYNA software was used to conduct transient dynamic analysis of the valve plate closing process.The maximum stress and maximum velocity of the valve at the moment of collision of the high temperature valve at different initial angular velocities were calculated.The results showed that with the increase of the initial angular velocity,the maximum stress and the maximum velocity at the moment of collision gradually increased.Then multi-objective genetic algorithm was used to optimize the structure of the valve plate.The maximum stress of the optimized valve plate at the moment of collision was reduced by 20%and the weight was reduced by 5%compared with before optimization,the optimization effect is better.(4)The topological structure of high-temperature valves of different calibers were basically the same.Thus,solidworks is re-developed on the VS platform,and a database of all standard and non-standard parts was generated based on the parameter optimization results.The parameterized design software was written by using the data in the database,and the parameterized modeling of different series of high temperature valves with the same topology structure was realized,which reduced the design cycle of engineers and improved the production efficiency.