What is desalination of water PPT?
Desalination is when you remove salt from groundwater or seawater to make fresh water for you to drink. When you desalinate you heat the water leaving the salt behind condensing fresh water from the vapour or stream which has been used for thousands of years. The filtered water then enters the reverse osmosis plant.
What is a seawater desalination system?
Desalination uses reverse osmosis technology to separate water molecules from seawater. Water from the ocean is forced through thousands of tightly-wrapped, semipermeable membranes under very high pressure. The membranes allow the smaller water molecules to pass through, leaving salt and other impurities behind.
What is desalination Slideshare?
Desalination •Desalination is the process of removing dissolved minerals from brackish or seawater to produce freshwater.
What are the different types of desalination?
Today there are two main types of desalination technologies – membrane (RO) and thermal (MED, MVC and MSF) desalination. Reverse Osmosis (RO) desalination uses the principle of osmosis to remove salt and other impurities, by transferring water through a series of semi-permeable membranes.
Why desalination of sea water is important?
Benefits of Seawater Desalination: Provides people with potable water (clean & fresh drinking water). Provides water to the agricultural industry. Water quality is safe (not dangerous or hazardous to any living thing). Uses tried-and-tested technology (the method is proven and effective).
What are the types of water desalination?
What is thermal desalination process?
Thermal desalination is a process that involves changing saline water into vapor. This vapor, or steam, is generally free of the salt, minerals, and other contaminants that were in the saline water. When condensed, this vapor forms a high-purity distilled water.
How can we improve the performance of a seawater intake system?
The water flow path between the inlet openings in the intake structure and the flow pipeline to shore should be streamlined to ensure water velocities increase gradually; Abrupt changes in flow cross-section areas should be avoided to minimize turbulence and consequent power loss;
What is a seawater intake&outfall system?
Seawater intake & outfall systems are used across the world, to draw in seawater and dispersion of brine, for desalination and power plants – producing potable water for drinking and as a source for cooling and steam to aid onshore processes. The following are the main items of seawater intake and outfall system:
How much power does a sea water pump use?
2.2 Pump Motor 3-Phase Asynchronous Motor Type: YZ-280M Voltage: 380/660 V Current: 167/96.4 A Frequency: 50 Hz Speed: 1485 rpm Power: 90 kW Sea Water pump has been in operation from August 2010 till date. This is amounts to 10 months of operation. The sea water pumping system runs under a number of abnormal conditions.
What problems occur in the operation of sea water pumps?
The following are some of the problems that occur in the operation of the sea water pumps. There is a lot of rubbish (plastic waste) in the sea water and it gathers at the inlet of the pump. This reduces the water that enters the pump inlet, making the pump motors current low.