Development of Analysis System of Rheology Characteristics for Slurry containing Fine Powders

本文研究了牛顿流体和含有微细悬浮液体的非牛顿流体的粘度和流动特性分析的新理论和测量设备。我们在前一年建立了测量理论，用正确的测量方法测量了一些非牛顿流体的流动特性。在这一年里，我们计划建立自动化测量的原理和方法，并且我们有另一个目的，使设计和制造小尺寸流变仪成为可能。设计制作了柱径10mm、柱高20cm的小型流变仪。新型流变仪的样品容量是上年生产的流变仪尺寸的1/8。研制了自动测量系统，将两个磁传感器测得的针端速度信息输入计算机，测量出剪切速度与剪应力之间的关系。实现了牛顿流体、拟塑性流体、膨胀流体、宾厄姆流体、非宾厄姆流体等不同流动特性的区分，并实现了流体种类的自动固定和流动特性图的制作。采用小尺寸流变仪测量了水煤浆的粘度和流动特性。本发明的流变仪能够准确测量水煤浆的流动特性。该流变仪可用于化工厂的质量控制。试验结果表明，该流变仪可以作为管道式粘度计安装在化工厂的生产设备管道中，实现粘度的连续测量。

We did a research to develop the new theory and the measurement equipment to analyze the viscosity and a flow characteristic of the Newtonian fluid and the non- Newtonian fluid that contains liquid of minute particle's being suspended. We established measurement theory in the previous year and we measured a characteristic of the flow of some non-Newtonian fluids with the correct measurement.In this year, we planed to establish the principle and way to automate measurements, and we had another purpose which makes it possible to design and manufacture the small size rheometer. The small size rheometer with 10-mm column diameter and 20-cm column height was designed and manufactured. The sample capacity of the new rheometer was 1/8 compared with the size of rheometer created in the previous year. The automatic measurement system was developed, which measures the relation between shear velocity and Shear stress by taking the information of terminal velocity of the needle obtained by the two magnetic sensors into a computer. Moreover, we made it possible to distinguish between the different flow characteristic, I.e. Newtonian fluid, pseudo-plastic fluid, dilatant fluid, Bingham fluid and non-Bingham fluid and to fix the kind of fluid automatically and to make the flow characteristic chart. The viscosity and flow characteristic of CWS (Coal and Water Slurry) was measured using the small size rheometer. The rheometer created here was possible to measure correctly the flow characteristic of CWS. The rheometer can be applied to the quality control of the chemical plant. Moreover, it was shown that the rheometer could be used as the in-line-type viscometer incorporated into the manufacturing equipment pipeline of the chemical plant to measure continuously the viscosity.