The universal 4-in-1 solid matter feeder for cost-effective digester feeding
The solid matter feeder PreMix for biogas applications

Mixing a variety of solids with a liquid and mashing it all to form a homogeneous organic suspension suitable for bacteria – that is the PreMix’s strength. This is why the solid matter feeder is just as suited for renewable resources as well as other input materials – whether that means pasty food waste, bulky crops or organic waste.

One decisive advantage of the solid matter feeder PreMix is its foreign matter separator and the preparation of the biomass, even before the integrated positive displacement pump: After the biomass has been fed to the solid matter feeder via a screw conveyor, the first step is to separate out the heavy material. Then, coarse particles are crushed and fibrous matter is cutted. Right from the start, this smart concept thus avoids damage from stones, metal parts and other heavy material and ensures that the biomass is properly prepared for the bacteria. One PreMix can supply several digesters. A drive power of 20 to 50 kW is sufficient (depending upon the model) for delivery rates from 20 to over 100 m³/h.

Due to its compact design, just a few square meters are enough to set up the PreMix – including space for service and maintenance work. This makes the installation and integration into new systems or the update of existing biogas plants easy, and operators can flexibly make use of the most varied biomass, without having to change the parameters for the solid matter feeder for every change. Combined with a Vogelsang Performance Cut Control (PCU), the solid matter feeder is ready to be automated.

Downloads

Features of the PreMix

The PreMix is distinguished by its unique concept: In a PreMix heavy material is separated out and material with long fibers is cut before entering the pump unit. This enables even difficult and demanding input materials to be reliably prepared, protecting the pump unit and significantly extending the service life.

The unique arrangement of the components and the direct connection between the RotaCut and the suction housing of the pump unit creates an extremely compact feeding system which is easy to integrate, even when retrofitting on existing plants. For four steps, you only need a few square meters, which includes space for service and maintenance.

Both for the progressive cavity pump in the CC series as well as for the RotaCut in the RCX series, all of the necessary service and maintenance work is easy to do on site, without having to disassemble the lines going to and from the units or any parts of the PreMix.

The housing parts are made of steel. The torsionally stiff design is the basis for the intensive preparation of the biomass in the smallest space. Hot dip galvanization protects the parts of the housing from corrosion.

Both the RotaCut RCX cutter as well as the progressive cavity pump in the CC series are driven by a sturdy helical shaft mounting geared motor with a high operating factor. This is mounted directly onto the drive shaft so an additional coupling is not needed.

A generously sized cardan shaft with two cardan joints ensures reliable transmission of the drive power in the CC series from the parallel shaft geared motor to the rotor. A sturdy sleeve – which doesn’t even have to be disassembled when changing the rotor – protects the shaft against solid and fibrous matter and against foreign matter in the medium.

Additional information:

Readjusting the blades in the RotaCut RCX with the ACCplus ensures that there is permanent, direct contact between the blades and the screen. It is only this contact which makes it possible to reliably chop down materials with long fibers. In addition to this, the ACCplus monitors the state of the blades online, shows it on an external display and in the control system during normal operation.

Options of the PreMix

The Debris Removal System (DRS) removes the separated heavy material during ongoing operation with no need to switch off or open the solid matter feeder or foreign matter separator. The system removes the heavy material with only minimal loss of medium (only around 15 l). In comparison to conventional solutions, the DRS reduces the work required by up to 80%.

Additional information:

The progressive cavity pump used in the CC series is optionally available with a two-stage geometry. This increases the permissible differential pressure, halving the pressure difference per stage, resulting in a longer service life, even with strongly abrasive media and/or high pressures.

On request, the Performance Control Unit (PCU) is available in a variant with a PROFINet connection.

The optional wide screen touch display offers an overview of all of the important information and settings, even outside of the central control. Built into the control cabinet door, all important details are easy to access and set via the intuitive menu.

Optionally, Vogelsang can also offer control hardware and software including the sensors from just one source.

All PCUs are equipped for access via remote maintenance. If access is activated and made possible, operators benefit from uncomplicated software updates and, when events call for it, we can quickly and easily support the customer.