Abstract
The rotary regenerative thermal oxidizer of a high temperature valve (rto-HTV) is repeatedly opened and closed, which causes deformation of the valve page and leads to shortened durability. To prevent the drawback, analysis of impact stress at the moment of rapid collision between the valve page and valve seat is critical. The analysis is focused on optimization of the design variable based on the multi-objective algorithm under transient conditions. To perform transient dynamics, LS-DYNA software is applied for the dynamic analysis of valve page rapid collisions under different initial angular velocities ω. From the LS-DYNA output, the response surface methodology is combined with multi-objective optimization for determining the optimized design variables of the rto-HTV valve page. As a result, the valve page maximum stress (σpage)max is increased with the increase in ω, from (σpage)max = 134 MPa to (σpage)max = 175 MPa. The maximum velocity (vpage)max is increased with the increase in ω, from (vpage)max = 4472 mm/s to (vpage)max = 7475 mm/s. Based on (σpage)max and (vpage)max, the optimization results show that (σpage)max is reduced by 20% and the valve page mass Mpage is reduced by 5%. Moreover, (σpage)max of the optimized valve page is less than the yield strength of 316S at 800 °C. Therefore, the optimization of the valve page is satisfactory and effective for reducing the impact stress between the valve page and valve seat during collision.
Highlights
Regenerative thermal oxidizers (RTOs) effectively treat volatile organic compounds (VOCs) by high-temperature oxidative combustion reactions, which leads to a huge amount of heat in the process.1 On the other hand, these high-temperature valves of RTOs play a crucial role in the thermal control during VOC combustion reactions2 by controlling the direction, pressure, and flow rate of the fluid.3 Among the classification of the valves, the rotary RTO of a high-temperature valve has a relatively modest structure and works on a similar principle to the butterfly valve
Due to this prompt condition, the valve page of the rto-HTV withstands a large impact of load,6 which is transmitted to the valve page and valve seat in the form of waves
The present study reveals that the response surface methodology of Workbench is satisfactory for the optimization effect of valve page structure
Summary
Regenerative thermal oxidizers (RTOs) effectively treat volatile organic compounds (VOCs) by high-temperature oxidative combustion reactions, which leads to a huge amount of heat in the process. On the other hand, these high-temperature valves of RTOs play a crucial role in the thermal control during VOC combustion reactions by controlling the direction, pressure, and flow rate of the fluid. Among the classification of the valves, the rotary RTO of a high-temperature valve (rto-HTV) has a relatively modest structure and works on a similar principle to the butterfly valve. These high-temperature valves of RTOs play a crucial role in the thermal control during VOC combustion reactions by controlling the direction, pressure, and flow rate of the fluid.. In case the temperature inside the RTO surpasses 800 ○C, the emergency cooling system sends a command to the rto-HTV to immediately scitation.org/journal/adv shut the valve page. Due to this prompt condition, the valve page of the rto-HTV withstands a large impact of load, which is transmitted to the valve page and valve seat in the form of waves. In order to prevent the manufacture accidents caused by the impact deformation on the valve page and seat, the maximum stress and maximum velocity of the valve page’s moment of collision under different initial angles of the rto-HTV should be clarified for optimizing the structural parameters of the rto-HTV
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
