Delta Air Strippers are designed to remove volatile organic
chemicals and certain other substances from water.
A blower, ducted into the sump plenum provides air at a slight
positive pressure and forces it to flow upward against the downward trickling water. This
is a countercurrent forced draft design.
As the air passes over the water, spread over the packing surface
as a thin film, the molecules of contaminant cross the air/water interface and enter the
air stream. The air then exits the column either to atmosphere or to some means of vapor
phase remediation process.
Delta Vanguard Air Strippers possess known, predetermined
stripping performance and operational characteristics based upon field test data obtained
from independent sources.
Stripper shell. The shell material is a hand lay-up FRP
isophthalic polyester resin of sufficient thickness to withstand the specified operating
conditions, as well as external loads imposed from earthquake Zone 4 and 120 mile/hour
wind loading. Guy wiring is standard; free-standing design is available as an option. The
shells are designed using the ASME/ANSI RTP-1-1989 Rev. 1991 Standards as a guide.
Treated water collection sump is integral with lower part of the
shell, forming a one piece, seamless component. The sump is provided with outlet and other
required connections, and incorporates a blower duct for air supply to the stripper.
Access and inspection port is provided in the sump plenum.
Connections (outlet, inlet and others) are constructed of FRP and
are fully gasketed with neoprene gaskets. 3" and larger connection sizes are flanged
(150# flanges), smaller than 3" size connections are NPTF. All flanges up to and
including 4"are gussetted.
Water distribution system is constructed of Type 1 PVC. Uniform
water distribution is effected by a single full cone, non-clog PVC spray nozzle which
provides uniform water loading to the entire packing surface. The typical nozzle flow turn
- down ratio is 2/1. For flows up to 350 GPM the nozzle is threaded into the inlet header
with an NPTM thread and can be readily removed and replaced. Nozzles for flows greater
than 350 GPM are 6" 150# flange connections.
Packing. Delta-Pak
Mist eliminator is Delta AB mist eliminator, constructed of Type
1 PVC material, compounded with carbon black for UV resistance. The eliminator is designed
to minimize drift loss to lower than 0.02% of the water flow.
Depth: 12 in. Type: Crimped plate, impingement type
Blower S1 and S1.5 use a cast aluminum/bronze radial bladed
wheel. The unit is arrangement 4 and is directly driven by a 3450 RPM motor. S2 uses a
backwardly inclined centrifugal blower wheel. The unit is arrangement 10 and is belt
driven by a 3450 RPM TEFC motor. S3 through S5 uses an airfoil blade design for most
efficient and quiet operation. The unit is arrangement 10 and is belt driven with an 1800
RPM TEFC motor.
________Delta Cooling Towers, Inc.
