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Tower AttachmentsTower attachments are permanent items of tower hardware welded to the vessel, generally by the vessel fabricator. There are internal and external attachments. Internal attachments including support rings, bolting and clamping bars, beam seats, clips and brackets, are provided to support and/or secure various tower internals by the vessel fabricator.
Top Installable (Removable)Trays are top installable, or top removable, if they are designed to be installed from the bottom up and removed from the top down, and the people doing most (but not necessarily all) of the installation or removal work are located above the tray being installed or removed. Bottom installed trays are normally used only for special situations, such as when traying is to proceed rapidly in both directions from tower manholes located at the top and bottom of the column, or in situations where trays are expected to sustain damage, and repair or replacement is more easily done from below.
Tray ManwayA manway permits workman passage through equipment partitions. A tray manway is a removable panel section in the fractionating tray which provides an opening through the deck allowing passage to adjacent sections within the column tray spacings for maintenance and inspection.
Cartridge TrayCartridge trays are widely used in columns too small for normal sectional tray installation and maintenance. This is generally considered to be 3 feet (0.91 m) in diameter or less. Packing is usually the preferred choice for these small diameter columns, but there are several reasons why trays would be advantageous. Examples include fouling systems, certain foaming systems, high pressure applications, and systems that require a large turndown.
Slot-and-Tap Design ConstructionHanbit Soltech Corporation can design without bolting at the panel-to-panel connection that can help to improve the tray uplift resistance. This design also gives a big advantage for the hardware reduction by eliminating the bolting requirement at the panel to panel joints, which results in saving the installation time at the job site.
Chimney TrayChimney trays are used for partial and total liquid draws. The number and arrangement of the vapor risers should be selected on the basis of providing proper vapor distribution at a reasonable cost. Risers may be round or rectangular. Rectangular risers are less expensive to fabricate. In trayed towers, the total riser area is typically 15 to 25% of the tower area. We can optimize riser heights to permit a larger volume of liquid on the deck.
Feed PipesHanbit Soltech Corporation also provides the feed pipe design for liquid-only, vapor-only and flashing feeds for both conventional and high-capacity trays. These Feed pipes provide a metered distribution pattern for maximum performance across the entire tray deck. With standard designs, the feed pipe attaches to the internal column flange and is supported by tower wall clips. Options include bayonet-style construction.
Dislogement Resistant TraysHanbit Soltech Corporation’s “D.R” trays are specially designed for applications where usual uplift surges exist so that mechanical failure is prevented. These trays are equipped with special heavy duty features that allow the individual tray is capable of withstanding pressure surges of up to 1 psi (700 kg/m2) and 2 psi (1400 kg/m2) or even 3 psi (2100 kg/m2) without permanent deformation or dislodgement of any components.
Floating Valve UnitsHanbit Soltech Corporation offers a variety of valves to meet customer requirements. The valve type commonly used for most applications is the MV2 valve. The MV2L valve has an "anti-pop" characteristic due to the twist leg construction. All valves are manufactured with or without anti-stick tabs. The anti-stick tabs offer reduced surface contact area which aids in preventing the valve from sticking to the deck when closed.
Other options :• Anti-spin orifice tabs to prevent tray deck valve orifice and valve leg erosion.
Various Tray Hydraulics
Blowing TrayTray floor visible, low delta P (low efficiency)
Tray partially activeMay Leak (some loss of efficiency)
Tray at 85% floodBeginning to Entrain (loss of efficiency)
Tray at 80% floodOptimum operation (peak of efficiency)
Tray at weep pointOccasional weeping (efficiency still satisfactory)
Tray at dump pointNo liquid flow over weir (poor efficiency)