Active heavy material separation
- Prevents damage due to foreign matter such as stones and metal parts
- Prevents blockages of pumps, gate valves and valves
- High throughput with low power requirements
- Sturdy and robust thanks to counter bearing
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DebrisCatcher - the reliable, active foreign matter separator
Foreign matter such as stones and metal parts repeatedly ends up in biogas plants, whether along with the solid biomass or in the fresh liquid manure. However, due to the required dimensions and the prevailing viscosity, there is often not enough room to reliably separate out the foreign matter using a passive foreign matter separator.
The DebrisCatcher is designed for cases precisely like this. It combines a gravity foreign matter separator with active foreign matter separation, offers maximum protection against foreign matter such as stones and metal parts, requires minimal space, and reliably and economically protects pumps and system components from damage and blockages that would otherwise occur.
Slow, laminar flow is created in the flow-optimized housing of the heavy material separator. These are optimal conditions for gravity-based separation of stones and metal parts. Heavy material that is too small and light to be separated in this manner ends up in the cutting screen along with the medium. It is retained there, picked up by the slow-rotating clearing units, and actively guided into the foreign matter separator.
Thanks to the non-contact design and low speed of the clearing units, the system has minimal power requirements. At throughput of up to 400 m3/h, the DebrisCatcher needs only 2 kW of drive power to protect downstream systems.
The housing is made of welded sheet steel and is hot-dip galvanized for high corrosion resistance, enabling maximum internal pressures of 4 bar. Applications under pressure, e.g. in high digesters or if supporting feeder pumps are used, can be realized without issue. At the same time, the combination of the non-contact functional principle and slow drive speed ensures minimized wear and a long lifetime.
How does the DebrisCatcher work?
The DebrisCatcher separates out foreign matter such as stones and metal parts using two methods, and combines a gravity separator with an active foreign matter separator. To start off with, the medium (e.g. organic suspension, liquid manure) flows into the side of the DebrisCatcher. In the main chamber, the cross section is significantly enlarged, which considerably reduces the flow speed. The design of the housing has been optimized using a flow simulation. Together, these two aspects result in a slow, laminar flow. In this way, the conditions in the DebrisCatcher are made ideal for the gravity-based separation of stones and metal parts.
Foreign matter which can’t be separated out like this by the foreign matter separator, e.g. because they are too small and light, or because the medium is too viscous, will move with the medium to the screen. Here it will be actively held back, until it is picked up by the slowly rotating, paddle-like, clearing units and will then be actively guided downwards into the container for foreign matter. As the clearing units rotate without touching the screen, there is minimal wear and this principle of operation is characterized by a long service life.
- Liquid manure
- Organic suspension