Simulation And Design Of Experimental Platform For Heat Transfer Of Granular Flow

There are many high-temperature granular wastes in the fields of metallurgy,chemical engineering,construction,and energy.Taking the metallurgical industry as an example,spherical particles are the main form of high-temperature slag.Its temperature is generally above 400 degrees centigrade,and it is rich in waste heat resources.The existing waste heat recovery technology tends to ignore the effects of radiation heat transfer when the particles are at high temperature,leading to a low recovery efficiency of waste heat,resulting in the waste of waste heat resources.It is of great significance to investigate radiative and conductive heat transfer of high-temperature granular flow for the goal of making full use of the waste heat resources in high-temperature particles.In order to investigate radiative and conductive heat transfer of high-temperature granular flow,this paper propose a set of experimental programs and designs an experimental device that integrates heating device,heat transfer device,and measuring device.This lays the foundation for the next step of experimental research on radiative and conductive heat transfer of high-temperature granular flow.Based on the structure of the resistance furnace,a heating device using a silicon carbon rod as a heating element was designed,and a thermal insulation layer of the heating device was designed and checked to ensure that the device has a good thermal insulation performance.Then,the thermal insulation layer and the heating process of the heating device was analyzed by ANSYS 17.0 workbench to ensure that the device can heat the experimental object to the experimental temperature,and has high reliability.Finally,the design drawings of the heating device were completed.Based on the structure of membrane water wall,a kind of heat exchange device with uniform wall surface temperature was designed.The operation status of the heat exchange device was simulated by Fluent to ensure that the reliability of the design was verified and the design met the requirements of the experiment.As for measuring equipment,the design uses thermocouples and radiant heat flow meters to measure the temperature and radiant heat flux variations of high-temperature granular flow,and preliminary arrangements are made according to the requirements of the experiment.Finally,the design drawings of the heat exchange device and the overall design drawings of the experimental device were completed.