Application
- Wastewater treatment plants
FEATURES & BENEFITS
- Low operational costs
- Ease of maintenance
DESCRIPTION
The most common degrit system in South Africa is the vortex tank or chamber type, a circular continuous flow-through vortex grit settling chamber. This chamber is sized according to peak flow conditions. The chamber consists of an upper separation section where, because of reduced flow velocity in the tank, the grit will settle into a lower chamber. The settled grit in the lower chamber is then removed by an air lift pump, self-priming pump or submersible grit pump. The grit is further pumped into a grit classifier where washing and water separation is carried out.
The air lift pump, mounted above the grit chamber, uses periodically dedicated blower air, compressed air and wash water injection to move the grit slurry through the pipeline and into a grit classifier for further processing.
The Self-priming grit pumps, mounted above grit chamber, has a tungsten coated recessed impeller that operates periodically, extracting grit from the lower chamber. The pumped grit slurry is fed through the pipeline and into a grit classifier for further processing.
Submersible grit pumps, mounted in the lower grit chamber, have a submersible tungsten coated body and impeller which operates periodically, extracting grit from the lower chamber. The pumped grit slurry is fed through a flex pipeline to the top of chamber for easy removal of pump via lift divert, then fixed pipeline and into a grit classifier for further processing.
