How does the technology work?
Both the Low Shear pump and the Coalescing pump are multistage centrifugal pumps with high hydraulic efficiency. The number of stages and the configuration of the individual stages are designed to control shear forces and to provide an optimal beneficial effect on the pumped media. The new pumps especially target produced water applications.
Are both pump types low shear?
Yes, both the Low Shear and the Coalescing Pump are low shear pump types. The added advantage of the Coalescing pump is the coalescing effect which requires a physically larger pump.
The pumps are mainly developed for produced water applications but will provide beneficial effects also when used on reject streams, slop water and drain water in petroleum process facilities.
What are the application areas for the pumps?
Is there a requirement for specific fluid composition to enable coalescence?
The droplet growth of the Coalescing pump is based on collisions between oil droplets. The coalescing effect is therefore proportional to the concentration of oil in water (at a given droplet size) and inversely proportional to droplet size (at a given oil concentration). The coalescing effect of the pump increases with increasing oil concentration and reducing oil droplet size. Generally this means that the pump works better the more difficult the water is. Salt and particle content also affects droplet coalescence. Normally, increasing salt and particle concentration increases droplet growth.
Are the pumps built in accordance with API 610?
Yes, the pumps comply with API 610 concerning material, service reliability and lifetime, seals, bearings etc. The Coalescing pump has some exceptions from API 610 connected to the hydraulic elements, but these are not influencing on service lifetime or reliability.
What is the difference between the Low Shear and the Coalescing pump?
The Low Shear pump is designed to control droplet breaking while the Coalescing Pump is designed to increase droplet size while pumping produced water. The Low Shear pump has a smaller footprint than the Coalescing pump. When designing Low Shear and Coalescing pumps optimally, information about oil type, oil concentration and expected oil droplet size in the pump inlet are all valuable information.