Cage Drive Thickener | ZCCG Center Drive Scraper | Sludge Thickener Scraper

Working Principle

The equipment is installed at the exact center of a circular tank. A motor and reducer drive the main shaft, rotating the suspended cage and scraper arms in a slow circular motion. The cage not only supports the heavy scraper arms but also features vertical pickets. As it rotates, these pickets break through the sludge blanket, releasing trapped gas and promoting compaction. The bottom scrapers push the sludge toward the central hopper, where it is discharged by hydrostatic pressure. The robust structure of this Cage Drive Thickener is built to withstand high torque, making it ideal for handling high-concentration sludge.

Application Fields

1.Municipal sludge thickeners: increasing waste activated sludge concentration to reduce the load on downstream dewatering equipment.
2.Water treatment high-density clarifiers: scraping and discharging high-concentration slurry from the bottom.
3.Steel and metallurgical wastewater: handling heavy mill scale at the bottom of large radial settling tanks.
4.Chemical and paper wastewater: thickening and scraping of physical-chemical sludge.

FAQ

Q1: Where is the drive unit of a cage drive center scraper installed?
A: The drive unit (motor and reducer) is mounted on the walkway platform or service bridge at the exact center of the circular tank. It sits on the center support to bear the weight of the entire cage and scraper arms while driving the main shaft.

Q2: What is the clearance between the bottom scraper blades and the tank floor?
A: There is usually a very small clearance (a few millimeters to over ten millimeters) between the scraper and the floor, or wear-resistant rubber strips are installed to hug the floor. This ensures effective sludge scraping without jamming the equipment if the tank floor is slightly uneven.

Q3: How deep of a settling tank is this Cage Drive Thickener suitable for?
A: Thanks to the truss support of the cage structure, it offers strong torsional strength. It is typically suitable for large settling or thickening tanks with depths of 4 to 6 meters, with the exact depth customized based on the tank drawings and shaft length.