Product Information
Designed primarily for bottom sludge removal in small to medium-sized circular clarifiers, this suspended center drive scraper features a drive unit mounted directly on the center walkway bridge. It drives the bottom scraper arms to rotate slowly through the main shaft, continuously pushing settled sludge into the central hopper. With a compact structure and moderate torque, it delivers stable sludge removal and is easy to install and maintain, making it an ideal companion for standard circular clarifiers.
Get a QuoteSuspended Center Drive Clarifier | ZCG Center Drive Scraper | Circular Clarifier Sludge Scraper
Working Principle
The main shaft is suspended from the center support directly above the tank. Once the motor and reducer start, they rotate the main shaft and the bottom scraper arms in a circular motion. The angled scraper blades push the sludge down the sloped tank floor into the central hopper, where it is discharged by hydrostatic pressure or a sludge valve. This Suspended Center Drive Clarifier often includes a scum baffle at the water surface to push floating scum toward the edge hopper while scraping the bottom.
Application Fields
1.Paper and pulp mills: continuous scraping of bottom sludge in pulp fiber settling tanks to reduce fiber loss.
2.Food and slaughterhouse wastewater: separating heavy meat scraps and sludge from the bottom of grease separation tanks.
3.Steel and metallurgical wastewater: scraping mill scale from rolling and continuous casting turbid water settling tanks.
4.Textile and dyeing plants: clearing high-color sludge from settling tanks after physical-chemical reactions.
FAQ
Q1: Is there a weight limit for the center support of a suspended structure?
A: Yes. Because the drive unit and main shaft are suspended at the center without bottom support, this Suspended Center Drive Clarifier is mainly used for small to medium-sized clarifiers (typically under 20 meters in diameter). For larger tanks or deeper sludge layers, a cage-supported model is usually selected.
Q2: Will the scraper arms damage the motor if they jam?
A: No. The equipment is equipped with a torque limiter or overload protection device. If the scraper hits a hard object or the bottom sludge becomes too thick and resistance spikes, the system will automatically cut power and alarm to prevent motor burnout or main shaft distortion.
Q3: Does the center support require frequent lubrication?
A: Yes. The center support usually houses a slewing bearing or sliding bearing with a grease nipple. Following standard maintenance, regularly (e.g., monthly or quarterly) applying lubricating grease will ensure smooth operation and extend the equipment's service life.