바이오가스 / 농업
NEMO® BT immersible pump: Low material wear despite high loads
Do you want to pump abrasive beet pulp directly from foil earth basins? NETZSCH Pumps & Systems, the global specialist in complex fluid management, has the solution to keep material wear as low as possible despite high loads.
We will show you how you can benefit from the service-friendly NEMO® BT immersible pump and make your process more efficient.
Low-cost alternative: Pumps for pumping beet from foil soil basins
Beet, especially sugar beet or cultivated energy beet, is becoming increasingly popular as an energy source in biogas production. Storing the beet in silos or silage hoses is complicated and expensive. A comparatively simple and cost-effective alternative is the collection of beet pulp in foil earth basins. However, pumping beet pulp from earth basins poses unique challenges for pump systems. Special pumps are therefore necessary.
Reduce wear when pumping beet pulp
The biogas plant operator transports around ten cubic metres of finely chopped beet per hour to the fermenter. However, a stab-resistant oxidation layer forms when the beet pulp is stored in the earth basins. Therefore, the highly viscous substrate must be sucked in underneath this floating layer. Horizontally mounted pumps at the basin’s edge, on pontoons or floating platforms, cannot provide the necessary suction power. Another challenge is the high sand content of up to ten percent of the substrate, which has a highly abrasive effect. In combination with the low pH value of the slurry, this attacks the pump materials.
NEMO® BT immersible pump conveys beet pulp with minor wear
A NEMO® BT immersible pump was therefore installed in the system, which is otherwise also used for emptying tanks and pits of viscous to non-free-flowing media, such as crude oil. The NETZSCH developers installed a stator made of the highly resistant elastomer NEMOLAST® and a chrome-plated stainless steel rotor. In addition, it is sufficient to operate the pump at a moderate speed of 190 rpm, which reduces abrasion.
This way, material wear could be kept low despite the high load, and the first stator replacement was only necessary after about one year of continuous use. Thus, you optimise your process and save time and costs simultaneously due to the extended service intervals.