Recently,we noticed sea water deslination in new way:Thermal deslination.However,most project still use RO membrane desalination.What is the difference between thermal desalination and membrane desalination?
Let's see it below :
Thermal desalination
(1) The temperature of the produced water is high, and it needs to be cooled by sea water
(2) The utilization rate of seawater is low (12%~20%)
(3) DC cooling water takes away part of the heat and leaves
(4) The amount of water produced in the system is closely related to the amount of steam
(5) Low salt content in hydration (5~10mg/L)
(6) The water quality requirements are low, and the pre-processing is simple
(7) The scale of the single machine is large, and the operation and maintenance amount is small.
Membrane desalination
1) The water production is greatly affected by the seawater temperature, the inlet water temperature decreases, and the water production decreases
2) The effluent seawater has a higher salt content
3) The total salt content (TDS) of the produced water is relatively high, about 350~600mg/L
4) Deboronation needs to be considered when producing water for drinking water
5) High water quality requirements and complex pretreatment
6) No need of steam, easy to start and stop
7) The equipment is small in scale, flexible in operation, and large in operation and maintenance
All in all ,the thermal method has a large amount of water intake, a high temperature of the produced water, and requires seawater for cooling, the quality of the product water is good, and the pretreatment is simple.
The pretreatment process of membrane technology is complex, the water production is greatly affected by temperature, the salt content of the produced water is high, the operation flexibility is large, and the operation and maintenance volume is large.
For more cooperation in sea water desalination,contact sara@water-ts.com
