High pressure exchanger for energy recovery in seawater RO plant
95% efficiency
1. Description of Rotor energy recovery coaxial boosting device
This pressure exchanger device has been widely applied in high TDS
seawater, waste water, landfill leachate RO treatment system. It
adopts "Rotor energy recovery coaxial boosting technique" to
realize energy recovery and pressure increase, it transfer the high
pressure energy from the concentrate flow from reverse osmosis
system to low pressure raw feed water, so the raw feed water
pressure has been increased to high pressure, then pressure boosted
by impeller pump to meet pressure requirement for seawater RO
plant, it reduce raw water flow to high pressure pump, hence save
energy consumption. This pressure exchanger device can help
significantly reduce operation cost of seawater desalination RO
plant, minizie the interconnecting piping, valves and instruments
requirement, simiplize the high pressure piping design for energy
recovery device, easily and space saving.
2.Key features
Designed for any size reverse osmosis desalination plant
98% efficiency
Scalable solution for our customers who need premium performance
energy recovery with a larger unit capacity
Lowest lifecycle cost of any energy recovery device on the market
3. Configuration: electric motor, impeller boosting pump, and rotor
pressure exchanger
3.1Rotor pressure exchanger:
The rotor pressure exchanger take advantage of positive
displacement theory: the low pressure raw water feed to pressure
exchanger from one end, the high pressure concentrate after reverse
osmosis feed to pressure exchanger from opposite end. The high
pressure energy is transfered from high pressurized concentrate
flow to low pressurized raw water flow inside the rotor chamber,
then the high pressurized raw water will be out by high pressure
concentrate flow, the concentrate flow pressure has been decreased
and out by raw water. The pressure exchange efficiency is 95% or
above, 1/3 higher then turbine machine.
3.2 Impeller boosting pump
It consists of pump body, diversion plate, rotor impeller, vane.
The boosting pump ensures continuous high pressure raw water output
after energy recovery device.
4. Applications
- Seawater RO plant, seawater desalination equipment, seawater
reverse osmosis system
- Oil drilling rig
- Landfilled leachate treatment
- Fire extinguisher (extinguishing) system spray
- Sepcial separation RO membrane system
- Other membrane system for highly TDS water treatment
6. Competitive advantage
This rotor energy recovery coaxial boosting device is made of anti
corrosion Super Duplex which provides unmatched durability in even
hardest working condition. The simplicity and modularity of this
design allows for optimum scalability, quick startup, and no
required maintenance. The PI series Pressure Exchanger device
captures hydraulic energy from the high pressure reject stream of
seawater reverse-osmosis processes and transfers this energy to low
pressure feed water with over 95% efficiency.
