Chain clearer
A chain scraper (also known as a belt scraper ) is used in sewage treatment plants or large-scale industrial wastewater treatment plants to continuously transport soil and floating sludge from settling basins in wastewater treatment plants .
The systems, which are mostly designed as plastic chain scrapers today, run in rectangular settling basins.
The advantage of the plastic chain clearers compared to steel chain clearers lies primarily in the very light, also extremely durable plastic design of the chains and scraper bars. This makes the system more energy-saving, more efficient and less subject to wear than conventional scraper systems.
In addition to the conventional version with plastic conveyor chains and plastic clearing bars, there is also a version widespread in German-speaking countries in which only the conveyor chains and the sprockets and their bearings are made of extremely durable plastic. However, the clearing bars, the deflection axles and the drive shafts are made of stainless steel, which results in a significantly more robust design.
The stainless steel clearing bars are designed as tightly welded hollow bodies and are equipped with rollers. Due to the rolling friction, the overall frictional resistance of the system is considerably reduced compared to conventional systems with sliding shoes and additional energy savings can be realized. The advantages of these chain scrapers in a robust design with stainless steel components are particularly evident in extremely wide and at the same time very long clarifiers.
Components
Explanations
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Web links
- Video: Plastic chain clearer in action