Regeneration of activated alumina is a kind of porous, high dispersion of solid materials, there is a lot of surface area, its micro porous surface has the catalytic effect of the required features, such as adsorption, surface activity, good thermal stability, etc., so it is widely used as a chemical reaction catalyst and catalyst carrier, in use should pay attention to below six points:
1. Extend the soaking time of the filter material in the acid solution, and neutralize the residual alkali solution of the filter material more thoroughly.
2. Extend the contact time between active alumina filter material and strong alkali regeneration solution, and increase the elution rate of fluorine.
3. Operate the defluoridation tank without adjusting the PH value of the water for a long time, which not only saturates the filter material in advance, but also affects the adsorption capacity after regeneration.
4. The adsorption capacity of the recycled filter material on fluorine decreased obviously.
5. The first regeneration of the filter material is complete.
6, adjust the inlet PH value within the specified range (6.5-7.0), not only can improve the water quality, but also extend the life of active alumina filter material, better play the function of the filter material fluorine.