Abstract:
Bubbling contact scrubbing is an important method for the separation and purification of gas-solid wet scrubbing. Dust-containing bubbles are the unit dust collectors of bubbling contact scrubbing, in-depth research on the operating characteristics of dust-containing bubbles will provide important theoretical support for the efficient removal of fine particles and the optimal design of bubbling scrubbers. Based on the volume of the fluid-discrete phase model (VOF-DPM) method, the rising process of the dust-containing single bubble and the parallel dust-containing double bubble in the initial static liquid and the effect on the particle removal efficiency are studied. Results show that smaller bubbles have complex deformations and irregular oscillations, with higher deformation strength; when the bubble size is greater than 12 mm, the shape change is suppressed, the rising bubble deformation has an enhanced effect on the removal of solid particles, and smaller size bubbles have a higher particle removal efficiency due to complex morphological changes. The removal efficiency of different size particles in different size bubbles is significantly different, and there is a suitable bubble size range for efficient removal. When the initial distance between parallel dust-bearing double bubbles is constant, their ascending process in the initial liquid state presents a "close-separate-close" cycle. The effect of the interaction in the process on particle removal is different within different size parallel double bubbles, the bubble interaction can enhance the particle removal within a certain size range. The 8—10 mm double bubble interaction strengthens the removal of 1 μm particles, while the 12—14 mm double bubble interaction weakens the removal of 1 μm particles.