As we all know, GN has been providing excellent decanter centrifuges for many years, now many global clients are using GN decanter centrifuges for their oil and gas solids control work. There are some other areas are using GN centrifuges, such as waste water treatment, mining/ core drilling fluids recovery.
GN has two types of decanter centrifuges: the first one is fix speed and the second one is variable speed. The fix speed type is rotating as 3200 rpm or 2800 rpm, you can change the speed by using different pulleys and belts. For clients are fully understand the solids they are going to separate, we recommend to use fix speed. Sometimes, changing another pulley and belt might be a little bit difficult for workers without good hands-on skills.
It is quite obvious that the variable speed decanter centrifuge is much more convenient than the fix speed. Whenever you need to change the speed, you can just set it on the VFD control panel. For clients have solids in different densities or sizes, VFD control decanter centrifuge are also highly recommended.
How to operate the VFD control panel? Today we’ll give you a brief idea on it.
Let’s take GNLW363 decanter centrifuge as an example. As GN control panel is designed for explosion proof, so it needs to be equipped with an air compressor and provide clean air with 0.2 MPa to 0.3 MPa. After around 20 minutes air feeding, the control cabinet switch is on with the pressure of 80 MPa to 800 MPa. When the auxiliary control cabinet is in the status of testing, the main control panel can be powered on even the door of the cabinet is open.
The rotating speed of the bowl (from 0 to 3200r/min) and the differential speed (from 0 to 45r/min) can be adjusted on the control panel. When you change the above two parameters, the corresponding speed of auxiliary motor and the actual rotating speed of the main motor can be changed automatically. According to our former experiences, the rotating speed of decanter centrifuge is recommend to set at the speed of 2800 rpm, while the differential speed is recommend to set at the speed of 35rpm, however, these two parameters are not always the same due to various drilling fluids that are treated.
