Trading and engineering company focusing on process pumps
In the spring of 2021, Copenhagen pump entered into a collaborative project to pump bio-fluid for a dry matter measurement of a complex liquid. For energy and metrological reasons, it made the most sense to increase the pressure on a representative partial flow and not the entire production flow.
The advantage of using an Allweiler progressive cavity pump is that the flow is constant regardless of pressure variation and depends solely on displacement and rotation speed.
At the same time, the pump can handle varying viscosity, solids and other fluid-related characteristics without compromising capacity. It is this characteristic that makes the progressive cavity pump particularly suitable for bypass pumping.
Dry matter measurement in complex liquids.
Complex fluids are liquids that are composed of more characteristics than a traditional Newtonian fluid. Household-based bio-waste from home green bags is reprocessed into a homogeneous liquid in special plants. In the process, the bio-waste is transformed into a valuable finished product, where the carbon compounds of the dry matter can be easily converted into bio-fuel or biogas. It is therefore of great interest to both the producer and the product buyer to be able to quickly and accurately determine the dry matter content. In the process, the waste is transformed into a complex liquid, i.e. a liquid containing, among other things, air, which gives rise to error measurement, as the dry matter meter sees air bubbles as dry matter.
With the Lisco/Valmet bypass-based dry matter measurement system (microwave-based meter) and a bypass pump from Allweiler, air bubbles are reduced so that they no longer disturb the measurement. At the same time, the measurement is done with a controlled low energy consumption. The accuracy of the measurement is with lab. test verified better than 1%.
In the you tube video below, application engineer Jens Poulsen from Lisco explains the system structure.
Project: Bypass Pumping
Fluid: Bio sludge
Capacity: 2-500 l/min
Pressure: 0-6 bar
Viscosity: Varying 100-1000 mPas
Solids content 10-22%.
