This large wastewater decanter centrifuge is tasked with continuously separating solid materials from liquids at a Canadian Pulp & Paper Mill.
Enormous quantities of water are used in the pulp and paper manufacturing process. For the process to be successful, fibres, such as pulp, wood, wood chips, and recycled paper must be suspended in water. In doing so, large amounts of wastewater is created. This wastewater must then be recovered so it can be reused in the future. Part of the wastewater recovery process involves using a Wastewater Decanter Centrifuge.
The Wastewater Decanter Centrifuge turns extremely slowly. The Bull Gear takes about 10 minutes for it to complete one full rotation, the pinion rotates at 2.95 RPM.
Due to the slow-speed nature of this asset, an ultrasound data collector with the ability to record large amounts of data, in the form of a long acquisition time is the best tool for the job.
When monitoring this asset, the SDT Ultrasound Solutions Partnered Ultrasound Services Team chooses to take readings with the #SDT340, as it is capable of taking 10 minute readings, which are necessary to capture one full rotation of this assets bull gear.
The 10 minute time waveform recording can be observed below in Figure 1.