Study on internal structure optimization of drying Chamber of Sludge drying equipment

¹ School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhaung, Hebei 050043, China
² School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei 056038, China.

^* Corresponding author: renxiaofen@stdu.edu.cn

Abstract

Aiming at the problem of uneven distribution of velocity field in the drying chamber of JKFF series low-temperature closed cycle sludge drying equipment, the influence of internal structure change of drying chamber on air distribution was studied by numerical simulation. Fluent software is used for simulation, through the analysis of three factors affecting the internal structure of the oven, such as the position of the blower, the spacing of the mesh belt layer and the size of the aperture of the nylon mesh belt. The results show that it is better to put the air blower inside the heat pump than to put the air blower outside the bottom of the oven. When the spacing between the second and third layers is 240mm, the overall air distribution in the drying room is the best; By comparing and analyzing 9 combined working conditions of mesh belt aperture size, it is concluded that when the aperture size of the first and second layer mesh belt is 2mm×2mm, and the aperture size of the third layer mesh belt is 1.5mm×1.5mm, the air distribution in the oven reaches the best state.