Deema represents Edwards Ltd UK in India. Edwards is one of the leading companies in the world for Liquid Ring Vacuum Pumps , Hybrid LRVP Packages, Vacuum Compressors and Steam Ejectors. Edwards in part of Atlas Copco group.
LIQUID RING VACUUM PUMP
The liquid ring pump range includes both one and two stage machines enabling optimum efficiency for processes operating across the vacuum range. Pump capacities up to 40,000 m3/h are available in one stage and 7,500 m3/h in two stage models.
HOW IT WORKS
The pump impeller is mounted eccentrically to the axis of the pump casing, when the impeller is rotated at the appropriate speed and a supply of liquid is introduced into the pump chamber the liquid ring is created concentrically to the pump casing. As the impeller rotates a chamber is formed by the impeller blades and the inside of the liquid ring, as this chamber is open to the suction port gas is sucked into the pump. As the impeller continues to rotate the pumping chamber reduces in size because of the eccentricity the trapped gas is compressed, once the chamber reaches the outlet port the gas is discharged at an increased pressure along with some of the seal liquid which removes the heat of compression.
Wet process gases
Liquid ring pumps offer significant advantages when pumping wet gases and vapors and for applications requiring special materials of construction for corrosion resistance.
The volume of incoming wet gases is reduced by cooling and condensing, this reduces the volume enabling a smaller pump to be selected.
When pumping corrosive process gases or selected seal liquid is corrosive, pump materials of construction which are compatible can be selected. In addition to the standard options shown in the table below bespoke options combining different materials and special materials such as Hastelloy.
Standard LRP Package
Liquid ring vacuum pump performance is dependent upon the seal liquid properties; the seal liquid must be at a temperature which is low enough to enable the pump to operate at the desired suction pressure. To minimize
the amount of seal water required it is often desirable to recycle the seal water back into the liquid ring pump, to enable this either some of the water must be replaced with fresh cooled water (partial re-circulation) or it should all be cooled by a heat exchanger (total re-circulation).
liquid ring vacuum pumps are offered as standard packages in three basic configurations, for operation in once through, partial or total re-circulation mode. Additionally, pumps are available in a selection of pump materials.
Engineered To Order System
We have many years experience in the design, engineering, assembly and testing of bespoke liquid ring pump and hybrid vacuum systems for the process markets, with equipment supplied for various process applications, including production of; aromatics, LAB, styrene, BPA, PTA, biofuels, fertilizers, adhesives and many others, providing customized solutions to meet customer requirements.
Petrochemical Vacuum Distillation, Vapour Recovery
Power Generation Condenser air extraction, Deaeration, Water box priming, Ash handling, Filtration
Offshore
Seawater deaeration, MEG recovery, Drilling mud recovery
Chemical Distillation, Evaporation, Filtration, Polymerization, Deodorization, Polymerization
Pharmaceutical & Fine Chemical
Filter drying, Degassing, Crystallization, Conveying
