Study of hydromechanical regeneration of Carbon NWC CC 12×40 activated carbon by passing through a hydraulic elevator

Summary

The results of studying the grain strength and recovering the sorption properties of Carbon NWC CC 12×40 activated carbon are presented. The possibility of high-rate washing of activated carbon filters was studied. The hydraulic parameters of air washing of carbon were specified in a large pilot filter model. It is recommended to carry out washings with a water feed rate of 10–15 l/(s·m²), and air – up to 15 l/(s·m²). Simultaneous feeding water and air is not permitted. Possible using hydromechanical regeneration of Carbon NWC CC 12×40 activated carbon by passing the pulp through the nozzle of a hydraulic elevator was demonstrated. After the hydraulic elevator the pulp flow returns to the filter, where water wash is simultaneously performed. Occasionally hydromechanical washing is recommended at intervals determined experimentally with the analysis of selected carbon samples. Carbon losses are about 5%. The size of the working carbon fractions is 2–3 mm. While using the developed hydromechanical regeneration method, the concentration of suspended solids in the source water should not exceed 5 mg/l, provided the parameters of wearing, grindability and sorption capacity of carbon are monitored.

Key words

hydrocyclone , sorption , efficiency of treatment , sand filter , Carbon NWC CC 12×40 activated carbon , hydraulic elevator , media grindability and wearing , hydromechanical regeneration of filter media