1. Mainly used for high concentration of hydrogen peroxide bleaching of deinking pulp, groundwood pulp or other kinds of pulp. 2. Cone structure of tower reduce the possibility of stock bridging. 3. Special inner structure ensures pulp fall uniformly, which unifies pulp falling time and bleaching time. 4. At the bottom dilution function achieve high consistency bleaching, low consistency conveying. It makes the process of stock preparation simpler.