Dewatering unit is widely used together with high speed decanter centrifuge for dewatering treatment. They are used to remove the untra fine solids inside the liquid mixture.
As the decanter centrifuge is a physical separation equipment. It can only separate solids and solids by gravity with centrifugal force. The centrifuge cut point is 2 microns. If there are ultra fine solids inside the liquid which is less than 2 miscrons, centrifuge itself cannot remove it. In this situation, chemical dosing unit will be used.
GN Solids Control provide various types of chemical dosing unit for dewatering treatment. Clients should choose the suitable chemical dosing dewatering unit based on their job site situation and their project demands.
How to choose the right model Dewatering unit?
1) First, clients need to confirm do they need explosion proof, or non-explosion proof is accepted for safety areas.
2) Secondly, clients need to confirm what is the voltage and frequency they need, normally, there is 380V/50HZ, 460V/60HZ. Other voltage and HZ, like 415V, 480V are also normally used.
3) Thirdly, clients need to confirm what is the dosing capacity they need to use to suit for their centrifuge capacity.
4) And then, clients need to confirm will they use powder chemicals or liquid chemical, or both. As the design is different. Powder chemicals need to be protected from moisture. Containerized type chemical dosing unit is normally used for powder chemicals. In order to make the container suitable for operators, air conditioner is optional to equip for the container. Liquid chemical is relative easy. Skid mounted PE barrels are normally used liquid chemicals.
There are fixed speed control centrifuge, VFD centrifuge, and FHD centrifuge. VFD centrifuge is the most popular used together with chemical dosing unit to dewatering treatment. 14 inch decanter centrifuge, 18 inch decanter centrifuge and 22 inch decanter centrifuge are the most popular used for dewatering treatment. GN Solids Control is also capable to make baby size centrifuge 9 inch, and huge size centrifuge 30 inch.