Hybrid Centralization Configuration

Intended for large SWRO systems, hybrid centralization concept combines the best aspects of the three-center design and conventional train configurations including:

• Feed pumps of any capacity and quantity feed a common feed header
• Each train equipped with an HP-HEMI
• The HP-HEMI raises the feed pressure to the membrane requirement
• Membrane pressure and recovery are precisely controlled by the HP-HEMI regardless of variations in the common feed manifold
• Each train can operate at a different pressure and recovery as set by the plant operators for maximum production and/or minimum energy consumption or to accommodate various states of fouling or membrane characteristics
• Easy to add or remove trains from production to meet capacity or maintenance requirements without disturbing operating trains
• Each train is independently controlled; no centralized control required for train operation

Several main HP pumps

• Runs at constant speed (no VFD) and medium pressure
• Single stage for low cost/max efficiency

5-6 trains equipped with HP-HEMI

• Each train under independent control for optimal feed and brine flow pressures
• 200 kW motor and VFD on each train
• No feed throttling
• Dynamic addition and removal of trains
• Extremely simple and reliable control
• Each train operates at an independent pressure and recovery as required for optimal performance

Each membrane module can operate at independent pressure and recovery. Able to easily add/remove trains from service without disturbing operation of other trains. Usually displays the lowest specific energy consumption of any ERD. About 10,000 m³/day per train.

Below is a decription and illustration of the Hybrid Centralization Configuration for a 50,000 m³/day system.