Dataset underlying the research of: a submerged cylindrical object in a liquid-solid fluidised bed - measuring local voidage and profile using a hydraulic weighing technique

A new soft-sensor was developed to measure a hydraulics pressure gradient in a liquid-solid fluidised bed (LSF). LSF is frequently encountered in drinking water treatment processes, often to obtain a large liquid-solid interfacial surface area. A large surface area is crucial for optimal seeded crystallisation in full-scale softening reactors. Due to crystallisation, particles grow and migrate to a lower zone in the reactor which leads to a stratified bed. Larger particles adversely affect the surface area. To maintain optimal process conditions in the fluidised beds, information is needed about the distribution of particle size, local voidage and available surface area, over the reactor height. This data set contains 54 individual measurements of calciet pellets (0.8-0.9mm), (0.9-1.0mm) and a mixture (0.5-0.63mm+1.25-1.4mm) and 3 mm glass beads for various water flow rates.

本研究开发了一款新型软传感器（soft sensor），用于测量液固流化床（liquid-solid fluidised bed, LSF）内的水力压力梯度。液固流化床常应用于饮用水处理工艺中，旨在获取较大的液固界面表面积。较大的界面表面积对于大型工业化软化反应器中的优化接种结晶过程至关重要。随着结晶过程的进行，颗粒不断长大并向反应器下部区域迁移，最终形成分层流化床。粒径更大的颗粒会对界面表面积产生负面影响。为维持流化床内的最优工艺条件，需获取反应器沿高度方向的粒径分布、局部空隙率以及有效界面表面积相关数据。本数据集包含54组独立测量数据，测量对象为0.8~0.9mm、0.9~1.0mm的方解石颗粒（calciet pellets）、0.5~0.63mm与1.25~1.4mm的混合颗粒，以及3mm玻璃微珠，测量涵盖了不同的水流量工况。