| 摘要 |
A bubble measurement cell is provided for measuring size distribution of gas bubbles in a liquid. The bubble measurement cell is adapted for insertion in a flotation column having a transparent, vertically-oriented, bubble-viewing window. The bubble measurement cell includes an antechamber, for placement adjacent the window in the flotation column, the antechamber having a transparent rear face. The transparent bubble-viewing window and the transparent rear face allow light to enter in sufficient quantity to illuminate the bubbles enabling photographic imaging thereof. A forward, downwardly-pointing deflection wedge deflects upwardly-moving bubbles. A transparent viewing chamber is provided which is situated to the rear of the antechamber and which includes a rear face, a transparent front face spaced from the rear face, and a pair of inner, vertical lateral spacers. The transparent viewing chamber is bounded at its bottom by a pair of inner, transversely-running, wedges forming a narrow inlet, which leads to a region of the viewing chamber of larger cross-sectional area by being thicker and wider than the thickness and the width of the inlet. An outlet is provided at the upper end of the viewing chamber to permit the escape of gas bubbles. In use, a monolayer of bubbles is presented in the transparent viewing chamber for the taking of a photograph of the shadows of the bubbles. Such photograph can be subjected to photographic analysis to measure the size and the distribution of the bubbles. |
