The customer runs an amine recycling plant. The amine sulfate delivered is processed in a rectification system. Caustic soda reacts with the sulfuric acid contained in the amine sulfate. The result is a sodium sulfate solution which is pumped into a storage tank. The Boerger Protect Rotary Lobe Pump is used in the neutralizing process by adding sulfuric acid. The Boerger Protect pumps the sodium sulfate solution from the storage tank back to this storage tank. In the meantime, sulfuric acid is mixed in on the suction side. A pH value can be measured using a meter attached to the pressure side. This procedure is repeated until the sodium sulfate solution indicates a pH value of 7.
The eccentric screw pump previously used kept having problems with the sealing. As the air quality control requirements are applicable here, the Boerger Protect Rotary Lobe Pump was selected. The barrier pressure was set to 8 bar in the thermosyphon tank. If the pressure drops below 5 bar, a pressure switch turns off the system. The medium pressure is restricted to a maximum of 3 bar by a pressure transducer. This ensures the minimum barrier pressure of 2 bar above feeding pressure.
|Boerger||Rotary Lobe Pump|
|Medium||Sodium sulfate solution, partially with sulfuric acid|
|Solids||Core sand with particle size up to 1mm|
|pH value||1 - 14|
|Temperature||60 - 100°C (140 - 212°F)|