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High performance liquid distributors aim towards ideal liquid distribution, i.e. equal liquid rate per unit area of the packed bed surface. These distributors are available in a complete range to suit various column diameters, liquid rates and service conditions. Models, which can give turndown ratio upto 10:1, are available. Our design team selects the most suitable model for a given application.
The following types are available:
I.Orifice Riser Type
HUILONG Orifice Type Liquid Distributors are mainly suitable for low turn
down ratios. Three basic types are available Plate Type, Pan Type for smaller sized towers and Ladder Type.
For the Plate and Pan Type distributors, the gas flows through risers that are either round or rectangular in shape. The liquid collects on the deck and flows through the orifices to the packing. In Pan Type designs, the gas also flows through the annulus between the distributor and the vessel. By varying the size and number of orifices, the distributor can be made adaptable to a wide range of flow rates. For high
efficiency designs, HUILONG can provide drip tubes instead of orifices.
Ladder Type distributors are suitable for liquid feed under pressure, and where limited space is available for the distributor. These provide a high amount of free area for gas flow and uniform liquid distribution over the entire tower cross section.
All types are available in diverse materials metals, thermoplastics and FRP.
The basic distributor design can be modified for use as either Redistributors or Liquid Collectors. For Redistributors hats are incorporated on top of the risers, while with Liquid Collectors the orifices are not provided. Other variants include adding “anti
migration” bars at the bottom of the distributors that eliminate the need for separate bed limiters.
II.Weir Trough Type
HUILONG Weir Type Liquid Distributors effectively handle a wide variety of gases and liquids. They feature a series of closed end troughs that have slots through which the liquid is uniformly dispersed over the packed bed. Liquids feed evenly to one or more of the parting boxes, which in turn distribute the flow to the troughs. The parting boxes receive the liquids through sparger type feed pipes. The tower diameter and the liquid flow determine the number of parting boxes. Up to three parting boxes may be required depending upon tower size and flow rates. Mid
span supports are required for 120” and larger sizes. Typical turn down ratio for LDW’s is 4:1.
HUILONG LDW's are self cleaning, resistant to fouling, and are suitable for liquids with high solids content.
HUILONG offers other variations in the distributor design including:
• Distributors with high drip density for low liquid flows
• Rectangular slots with flow guides for precise liquid control
HUILONG Separation Products, Inc. manufactures a full line of tower internals, mist eliminators and other components critical to effective mass transfer and separation. For more details regarding these products, visit our website or consult with an HUILONG Separations representative.
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