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- Title
Experimental and computational study on the anti-re-entrainment performance of an innovative demister with embedded drainage channels.
- Authors
Shi Bu; Yong Jia; Quan Yang; Zhengjun Yang; Meilian Yang
- Abstract
An innovative demister design with embedded drainage channels is proposed for the purpose of achieving higher anti-re-entrainment performance in multi-stage flash (MSF) desalination applications. Experimental work producing ultra fine droplets (≤50 µm) is carried out to systematically assess the influence of plate interval (22-30 mm) and inlet velocity upon pressure loss and separation efficiency. Numerical simulation employing turbulence SST k-ω model and Euler-Wall-Film model is conducted to study the flow field details in the demister passage. The results indicate that the critical inlet velocity can be improved to 8.5 m/s which yields excellent anti-re-entrainment ability and hence higher treating capacity of MSF. The embedded drainage channels act an essential role in resisting secondary droplets, suppressing shear force and enhancing liquid collection through integrated design and vortex generation. The new demister especially receives outstanding comprehensive performance at higher inlet velocities thanks to its stronger anti-re-entrainment ability. Despite the trade-off between overall separation efficiency and anti-re-entrainment, an overall better performance can be achieved with the new type if compared to the conventional designs. The superiority of the proposed innovative demisters with embedded drainage channels is also revealed by higher withstood maximum velocity, indicating potential to improve performance through optimization of the channels.
- Subjects
DRAINAGE; CRITICAL velocity; SHEARING force; PERFORMANCE theory; COMPUTER simulation
- Publication
Desalination & Water Treatment, 2023, Vol 316, p91
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.30154