Quantitative Investigation of Flocs Flotation Removal and Hydrocyclonic Separation for the Washing Water Treatment

• Published in: Applied Mechanics and Materials Vol. 333-335; pp. 1857 - 1861
• Main Authors: Ren, Xiao Jing, Li, Si Chen, Yang, Yi Yong, Tian, Shang Yun, Zhu, Li Min
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.01.2013
• Subjects: Separation Efficiency Testing; Gas-Flotation; Washing Water; Removal of Flocs
• ISBN: 3037857501; 9783037857502
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.333-335.1857

A new hydrocyclone and gas-flotation device was designed and tested for the treatment of the wash water containing the flocs. The device separates particles and removes flocs simultaneously. The gas-generator equipment can produce a large number of micro-bubbles, and the bubbles adhere to the impure flocs particles. This makes the density of the bubble-floc less than that of water, and their buoyancy enables particle separation and removal of suspended flocs. To achieve a high efficiency of flocs removal and particle separation, some of the factors that influence the separation efficiency (such as the gas-liquid pressure difference, gas-liquid ratio, underflow split ratio, water pressure, inlet flow rate, and the contact time of the gas and particles, bubble size, and number of bubbles) were investigated. The results showed that there is an optimum combination of multi-dimensional parameters; good particle separation and a high efficiency of flocs removal were achieved.