测量脱硫活化器内颗粒尺寸分布和颗粒数的PIV技术

颗粒尺寸分布及颗粒数是研究活化器脱硫效率的2个重要参数，本介绍了一种应用颗粒速度图像仪(PIV技术)测量脱硫活化器内颗粒尺寸分布和颗粒数的测量方法．为了提高测量的速度，采用Watersheld算法计算图像中每个颗粒的灰度域值，应用边缘增强滤波算于搜索每个颗粒图像的边缘，并用Freeman位的格式保存搜索结果．基于各个颗粒的Freeman位数据，可以计算出流场中颗粒的尺寸分布及颗粒数．最后给出了实际的测量数据及误差分析．研究结果表明PIV技术将是研究脱硫效率的一种重要的测试手段．

Measuring particle size distribution and total number in the activation chamber of desulfurization system by PIV

Application of particle image velocity (PIV) techniques for measuring particle size distribution and total number in an activation chamber of desulfurization system is introduced. Watersheld algorithm is used to choose the suitable initial gray level threshold which is used to change the gray level images taken by PIV to black and white ones, then every particle in an image is isolated totally. For every isolating particle, its contour is tracked by the edge enhancement filter function and kept by Freeman's chain code. Based on a set of particle's chin code, its size and size distribution are calculated and sorted. Finally, the experimental data of calcium particles and water drops, separately injected into the activation chamber, and the error analysis of data are given out.