THE CHALLENGE
A paper mill was struggling with maintaining 12% consistency while handling the paper pulp. The pump that was being used kept on breaking down repeatedly. Moreover, the pump was not able to ensure the required flow owing to the variation in the discharge pressure. All these factors critically hampered the entire production process.
EXISTING PROCESS
The paper mill was facing high electricity costs due to multiple centrifugal pumps transferring the medium-consistency pulp. The Centrifugal Pumps consist of an inducer at the suction end. These pumps use vacuum as the medium to transfer pulp containing a large volume of air. A pump with this kind of working cannot deal with the varying consistencies of the pulp, which ranges from 9%-12% bulk density.
This resulted in the variation of pressure drop in the pipeline and low efficiency of the pump.
ROTO’S SOLUTION
To resolve these problems, Roto’s Technical Team developed a Progressive Cavity Pump with a customized hopper and a special augur arrangement – Roto’s ‘Wide Throat’ Progressive Cavity Pump.
This pump was specially designed and built to handle the complicated task of handling medium consistency pulp – even to suspensions of 18% bulk density compared to 9%-12%. This pump is also capable of easily handling the entrapped air in the medium while eliminating the need to have an auxiliary vacuum system.
The exceptional feature of this pump, the variable-speed drive, facilitated the optimization of the flow rate. This pump has customized bridge beaker systems that can easily handle highly viscous and non-flowable media with entrapped gases.
DISTINCTIVE FEATURES & BENEFITS
- High efficiency & ease of operation
- Capability of handling variable consistencies – 6% to 18% bulk density during the process
- Variable pressure handling capability
- Customized hopper designs to suit the requirements of the application
- No auxiliary vacuum system required
- Capable of handling air present in the pulp
- Low maintenance cost and easy-to-maintain
- Available in a wide range of materials
