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- Title
Characteristic simulation and working parameter optimization of the aggregate dryer.
- Authors
Lin, Jiming; Bao, Ming; Li, Haozhen; Yang, Jianhong
- Abstract
The aggregate dryer is generally used in an asphalt mixing plant for road construction equipment and serves to heat the aggregates. In this work, the coupled method of Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) is used to study the gas-solid coupling of aggregate dryers to improve the heat exchange efficiency between flue gas and aggregate. The heating process of aggregates in an aggregate dryer is visualized by analyzing the particle discrete field and the fluid temperature field during drying. The motion process and distribution characteristics of aggregate particles are established for different outputs and rotational speeds, and the hot flue gas distribution and temperature characteristics of the aggregate dryer are also obtained. The results show that the rotational speed affects the distribution of the aggregate veiling zone and pressure, which in turn affects the stability of the flame. Reducing the rotational speed results in a more uniform distribution of the aggregate veiling zone and thus an increase in heat utilization. In addition, when the output of the aggregate dryer is 80 t/h and the rotation speed is 6.2 rpm, the aggregate discharge temperature is the highest and the thermal efficiency of the aggregate dryer is the best.
- Subjects
GAS distribution; FLUE gases; JOB descriptions; FLAME stability; ROAD construction
- Publication
Drying Technology, 2023, Vol 41, Issue 4, p590
- ISSN
0737-3937
- Publication type
Academic Journal
- DOI
10.1080/07373937.2022.2136685