Motion Simulation of Desulfurized Fly Ash in Dense Flow Absorber Based on Computational Fluid Dynamics

Abstract:

The motion track of desulfurized fly ash in flue gas was simulated by means of Fluent software. The abrasion and deposition of desulfurized fly ash to inner surface and other internals inside of dense flow absorber were studied. The results show that, under the simulated condition, the flue gas streamline is uniform inside of dense flow absorber which is installed with the equipment of baffle plates and four-layer delta wing plates. The desulfurized fly ash could be distributed uniformly and the pressure loss is approximately 340Pa. The abrasion rate of desulfurized fly ash to No.1 baffle plate is higher and the distribution is relatively concentrated, however, the abrasion rate of desulfurized fly ash to other layers of baffle plate and delta wing plate is lower and the distribution is relatively uniform. Besides, the abrasion rate of the dense flow absorber top and the A-convex surface is higher as well. Most desulfurized fly ash deposits on the bottom of ash hopper and some deposits on parts of baffle plates and delta wing plates. The deposition rate of B-convex surface is higher than that of A-convex surface. In reality, the highly corrosive parts inside of dense flow absorber should adopt wear-resistant materials. Meanwhile, water content of desulfurized fly ash should be controlled to avoid hardening of desulfurized fly ash which is deposited.

• Periodical: Advanced Materials Research (Volumes 694-697)
• Pages: 621-625
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.694-697.621
• Online since: May 2013
• Authors: Qian Jia, Cun Yi Song, Zhen Song Tong, Dong Hui Zhang, Kai Hua Chen, Xi Ning Lu, Yue Zhang
• Keywords: Computational Fluid Dynamics (CFD), Dense Flow Absorber, Desulfurized Fly Ash, Numerical Simulation, Sintering Gas

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