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Perforated distribution baffles, also known as calming baffles, are installed downstream of the inlet device in horizontal two-phase and three-phase separators, spanning the entire liquid section. Their function is to dissipate inlet turbulence and ensure uniform liquid distribution across the vessel cross-section, creating stable interface conditions for liquid-liquid separation. Multiple baffles with open area as low as 21% are used depending on separation objectives, cross-sectional velocities, and spacing. Full-diameter configurations address vapor maldistribution where required.
Distribution baffles also serve as motion baffles on floating platforms where pitch and roll destabilize the interface and cause carryover. TrayTec supplies and installs perforated distribution baffles to your vessel specification.
Optimized NFA & hole size
Optimal liquid distribution
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Open area determines the degree of turbulence dissipation and flow restriction the baffle introduces to the liquid section. Lower open area, as low as 21%, provides greater turbulence dissipation and a more uniform liquid velocity profile downstream but increases the differential head across the baffle. Higher open area reduces head loss at the cost of less effective turbulence damping. The correct open area is determined by the inlet device type, cross-sectional liquid velocity, separation efficiency requirements, and available vessel length. When two baffles are used, open area is typically varied between them to achieve progressive turbulence reduction. Contact TrayTec with your vessel drawings and process conditions to confirm the correct open area specification.
Two baffles are specified when a single baffle cannot achieve the required interface stability within the available vessel length, or when the inlet turbulence is high enough that a single baffle with the required low open area would create an unacceptable pressure differential. Two baffles with progressively varying open area allow turbulence to be reduced in stages, maintaining acceptable hydraulic conditions while achieving the separation objective. The number of baffles and open area combination is determined by the cross-sectional velocity, separation criticality, and downstream coalescer or mist eliminator requirements. Contact TrayTec to confirm whether a single or dual baffle configuration is appropriate for your vessel.
Yes. Distribution baffles are commonly used as motion baffles in horizontal separators installed on floating production systems, FPSOs, and offshore platforms where pitch and roll cause liquid sloshing inside the vessel. The sloshing creates an unstable vapor-liquid interface, excessive liquid loading on the demisting device, and potential liquid carryover when the liquid level rises on one side of the vessel. The distribution baffle compartmentalizes the liquid section and limits the movement of liquid mass inside the vessel, stabilizing the interface under dynamic conditions. Contact TrayTec with your vessel geometry and platform motion data to confirm the correct baffle configuration for your offshore application.
