 |
Fractionation
Trays |
A
full line of fractionation trays:
ACS
Industries has been designing and manufacturing fractionation trays
and other column internals for well over a decade. In supplying
new designs and replacemnet trays, the ACS engineering department
combines data from FRI and our proprietary research and development.
extensive experience in the refining and process industries enables
ACS to replace most exiciting trays. regardless of original manufacturer
Sieve
Trays
are the most widely used mass transfer device due to their
simplicity, versatility, capacity, and cost-effectiveness.
ACS incorporates the latest sieve technology in accordance
with industry practices and FRI test. Our designs utilize
feautres such as sweptback wiers, sloped downconers, and multi-pass
and dual-flow arrengements to accomodate customer requirements. |
Valve
trays
designed and built by ACS Industries include anti-spin devices,
twisted leg construction to resist dislodging, and crimped
edges to prevent adherence to the tray deck. Options include
contoured hole edges for lower pressure drop and multiple
valve weights for uniform operations over wide flow ranges.
Rectangular, caged, and fixed valves can also be supplied. |
Bubble-cap
trays
have numerous applications in refineries and gas plants due
to effectiveness over a broad range of flow conditions and
low susceptibility to fouling by particulates and residues.
ACS Insutries provides standard and custom designs in numerous
materials, gauges, and styles to meet the most stringent process
and turndown requirements. |
High-capacity
Ripple trays,
Licensed from Stone & Webster Engineering Corporation,
can increase column capacity by 20% or more as compared to
conventional trays. With over 200 applications worldwide in
distallation, absorption, striping, and heat transfer, Ripple
trays are a proven mass transfer device capable of debottlenecking
existing operations or downsizing new tower designs. |
ACS
Tray Design Standards
1.
Vapor and liquid design loads <=80% of flood
2.
Foam derating factor for capacity and area:
No
foaming expected ............................ 1.0
Moderate
foaming expected .................. 0.85
Severe
foaming expected ..................... 0.70
3.
Valves fully open at 100% of design load
Mechanical
Standards
1.
Valve edge crimped to prevent adherence to deck
2.
Perforations or valves on triangular (staggered) pitch
3.
All structures sectionalized to pass easily through tower access
ports 36" in diameter
4.
Deflection of tray deck <= 1/4" under design load
5.
Maximum allowable uplift pressure: 20 to 140 psf
6.
Manways on installed trays are vertically aligned
7.
Manways are removable by one person above or below
8.
Width of tray support rings:
Diameters
up to 2' 6" ............................. ring width 1.5"
Larger
diameters up to 5' 6" ..................... ring width 2.0"
Larger
diameters up to 12' 6" ................... ring width 2.5"
Larger
diameters up to 19' 6" ................... ring width 3.0"
Larger
diameters up to 24' 6" ................... ring width 3.5"
Diameters
larger than 24' 6" ..................... ring width 4.5"
9.
Minimum 3/4" overlap of tray and support ring
10.
Spacing between bolt holes around tray edge: 4" to 7"
11.
Minimum 2" claming zone at outlet weir
12.
Trays can be installed and removed from above or below
13.Available
metal thicknesses: 14 gauge up to 3/8" plate
14.
Available metals: all types of carbon steel and stainless steel;
high-alloy; exotics
15.
Trays are designed to support total dead load plus 300 pounds concentrated
load
Fabrications
Standards
1.
Holes punched from top side deck
2.
Gasketing (listing tape on bubble-cap and chimney trays and between
dissimilar metals); fiberglass, 1/16" thick
3.
Fasteners provided include 5% spares
4.
Edges of deck sections are free of burrs
5.
All parts die-stamped with part numbers to aid assembly
6.
Dimensional tolerances
Outside
diameter of tray:
Diameters
8' or less .............................................................
+- 1/4"
Diameters
over 8" ................................................................
+- 1/2"
Height
of inlet and outlet weirs ..............................................
+- 1/16"
Departure
from level outlet weirs ............................................
+- 1/16"
Perforation
diameter .............................................................
+- 1/64"
Distance
between perforations ...............................................
+- 1/16
Departure
from ean of any tray supporting member .................. Camber
+- 1/16"
Clearance,
downcomer to tray florr .........................................
+- 1/8"
Tray
floor total departure from level in any direction:
Diameters
2' 6" to 4' .............................................................
+- 1/8"
Larger
diameters up to 7' ......................................................
+- 3/16"
Diameters
larger than 7"..........................................................
+- 1/4"
Available
Tray Features
Vapor
capacity enhancements for valve and sieve trays: anti-blowing baffles,
anti-jump baffles, vapor tunnels
Alternative
weirs: pciket-fence, sawtooth
Dual
valve weights to minimize weepage at turndown
Low-pressure-drop
holes for valve and sieve trays:
Contoured
top (downstream)
Contoured
bottom (upstream) as well as top
Other
internals provided by ACS for trayed and packed columns include
chimney trays of several types for feed blending and side
draws, often with provisions for flashing feed and other design
challenges |
ACS
fabricantes hardware suitable for most trays. We stock various
metals and sizes for 24 hour shipment. Our consigment contracts
are especially convenient: use what you need out of a shupment
and return the rest. |
Partial
List of ACS Tray Applications
| Absorber-deethanizer |
Bemethanizer |
Hydrocracker
plant |
| Amine
stripper |
Diesel
hydrotreater |
Hydrogen
absorber |
| Ammonia
scrubber |
Diesel
stripper |
Methanol
extractor |
| C3
Splitter |
Ethanol
plant |
Methanol
fractionator |
| C4
Splitter |
Ether
column |
Naphtha
splitter |
| Caustic
quench tower |
FCC
main fractionator |
Naphtha/water
wash |
| Caustic
tower |
Furfural
plant |
Raffinate
strpper |
| Coker
fractionator |
Gas
scrubber |
Resin
plant towers |
| Crude
tower |
HVGO
tower |
Vacuum
flash |
| Debutanizer
|
Hydrodesulfuization |
Washing
drum |
| Deethanizer |
Hydrodesulfurization
absorber |
Water
wash tower |
Process
engineering
The
ACS process engineering department utilizes its expensive experience
in the oil, gas, refining, and chemical industries to provide a
complete line of fractionation trays and tower internals. Our longstanding
commitment to reseacrh and development and our membership in industry
organizations such as FRI and NPRA have kept ACS in a leading position
in the field of mass-transfer and separations technology
Design
and manufacturing
Designers
and manufacturing engineers at ACS Industries meet the challenges
of demanding process applications by using the latest computer-aided
engineering and drafting tools. These systems are integrated with
computer controlled manufacturing equipment to produce zero defect
products. High levels of automation reduce set-up time and streamline
production, allowing quick response and short delivery times. ACS
quality assurance engineers ensure that work is completed in strict
accordance with customer's specifications
|
