Humidity-control assists high-efficient coal fly ash removal by PTFE membrane

doi:10.1016/j.cjche.2021.05.017

Chinese Journal of Chemical Engineering ›› 2021, Vol. 40 ›› Issue (12): 88-95.DOI: 10.1016/j.cjche.2021.05.017

• Separation Science and Engineering • Previous Articles Next Articles

Humidity-control assists high-efficient coal fly ash removal by PTFE membrane

Dongyan Li¹, Xi Tang², Shasha Feng²

1. Chemical Engineering Department, Nanjing Polytechnic Institute, Nanjing 210048, China;
2. State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

Received:2021-04-09 Revised:2021-05-07 Online:2022-01-14 Published:2021-12-28
Contact: Dongyan Li,E-mail:ldy@njpi.edu.cn
Supported by:
This work is supported by the National Key Research and Development Project of China (2018YFE0203500), the High-end Research and Training Project for Specialty Leading Person of Jiangsu Higher Vocational Colleges (2020GRGDYX039), and the Qing Lan Project of Jiangsu Colleges.

Humidity-control assists high-efficient coal fly ash removal by PTFE membrane

Dongyan Li¹, Xi Tang², Shasha Feng²

1. Chemical Engineering Department, Nanjing Polytechnic Institute, Nanjing 210048, China;
2. State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

通讯作者: Dongyan Li,E-mail:ldy@njpi.edu.cn
基金资助:
This work is supported by the National Key Research and Development Project of China (2018YFE0203500), the High-end Research and Training Project for Specialty Leading Person of Jiangsu Higher Vocational Colleges (2020GRGDYX039), and the Qing Lan Project of Jiangsu Colleges.

Abstract

Abstract: In the present study, the effects of relative humidity on filtrating coal-fired fly ash with hydrophobic poly tetra fluoroethylene (PTFE) membranes were investigated. The intergranular force of particulate matter at different RH conditions was measured by analyzing the critical angle between particles. Effects of humidity (from 30% to 70%) on filtration pressure drop and membrane fouling conditions were characterized. It was found the membrane showed optimal filtration resistance of 530 Pa at RH of 60% and the gas permeance can be maintained at 1440 m³·m^-²·h^-1·kPa^-1. Moreover, to optimize the operation parameters for this filtration system, effects of fly ash concentration, diameter, membrane pore size, and gas velocities were systematically investigated.

Key words: Relative humidity, Collapse angle, Pressure drop, Poly tetra fluoroethylene (PTFE) membrane, Fly ash

摘要： In the present study, the effects of relative humidity on filtrating coal-fired fly ash with hydrophobic poly tetra fluoroethylene (PTFE) membranes were investigated. The intergranular force of particulate matter at different RH conditions was measured by analyzing the critical angle between particles. Effects of humidity (from 30% to 70%) on filtration pressure drop and membrane fouling conditions were characterized. It was found the membrane showed optimal filtration resistance of 530 Pa at RH of 60% and the gas permeance can be maintained at 1440 m³·m^-²·h^-1·kPa^-1. Moreover, to optimize the operation parameters for this filtration system, effects of fly ash concentration, diameter, membrane pore size, and gas velocities were systematically investigated.

关键词: Relative humidity, Collapse angle, Pressure drop, Poly tetra fluoroethylene (PTFE) membrane, Fly ash

Dongyan Li, Xi Tang, Shasha Feng. Humidity-control assists high-efficient coal fly ash removal by PTFE membrane[J]. Chinese Journal of Chemical Engineering, 2021, 40(12): 88-95.

Dongyan Li, Xi Tang, Shasha Feng. Humidity-control assists high-efficient coal fly ash removal by PTFE membrane[J]. 中国化学工程学报, 2021, 40(12): 88-95.

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Humidity-control assists high-efficient coal fly ash removal by PTFE membrane

Humidity-control assists high-efficient coal fly ash removal by PTFE membrane

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