Product Information
A vortex grit chamber desander is usually installed in the grit chamber and uses a hydraulic vortex to separate grit from organic matter. A vortex grit remover is typically a circular tank with a tangential inlet that creates a swirling flow. Grit gets thrown against the wall and settles, while organic matter gets carried out with the flow. The grit-water separator handles the grit-water mixture discharged from the bottom and dewaters the grit before it's hauled away. Used together, these three types of equipment effectively remove inorganic grit from wastewater and protect downstream equipment from wear.
Get a QuoteVortex Grit Chamber Desander | Grit-Water Separator | Vortex Grit Remover
Working Principle
Wastewater enters the vortex grit remover tangentially and forms a swirling flow. Denser grit is pushed toward the wall by centrifugal force and gravity, then slides down the sloped bottom into the grit collection pit. Lighter organic matter rises with the central flow and exits. The grit-water mixture in the pit is sent by a grit pump or air lift to the grit-water separator. Inside the separator, a spiral conveyor shaft moves the settled grit upward for dewatering and discharge, while water overflows back to the tank. The whole process runs continuously, with grit removal and organic separation happening at the same time.
Application Fields
1.Municipal wastewater plants: grit removal ahead of primary clarifiers to keep grit from wearing out pumps and pipes.
2.Industrial wastewater: removing inorganic particles and sediment from process wastewater.
3.Combined sewer systems: grit removal from intercepted wastewater during rain events.
4.Stormwater treatment: removing sand and suspended solids from stormwater.
FAQ
Q1: How fine a grit particle can a vortex grit chamber desander separate?
A: It generally separates particles above 0.2 mm and has some effect on fine grit in the 0.1–0.2 mm range, though efficiency drops. If the wastewater has a high proportion of fine grit, you can lower the inlet velocity or increase retention time. Even finer silt still needs downstream filtration.
Q2: Does the spiral shaft in a grit-water separator wear easily?
A: The spiral blades and the bottom of the trough are usually wear-treated—wear liners or high-manganese steel. Under normal conditions, service life is 3–5 years. If the grit has high quartz content and is very hard, wear will be faster, so check liner thickness regularly and replace as needed.
Q3: Does a vortex grit remover need aeration?
A: Some models don't—hydraulic vortex action alone separates the grit. Some aerated models introduce a small amount of air to strengthen the vortex and keep organics from settling. Whether to include aeration depends mainly on influent quality and grit removal requirements. Models without aeration are simpler and use less energy.