10

1

2

9-18 Toronto, Edmonton, Saskatoon, Vancouver, Montreal

9

6

7

5

3

4

8

Column Internals

Liquid Distributors• Tower diameter• Pourpoint density• Geometric coverage• Turndown• Presence of solids• Pressure drop• Liquid pressure• Liquid condition• Entrainment• Type and size of packing• Feed inlets• Space to top of packing• Material selection

Packing Supports• Tower diameter• Pressure drop & capacity• Packing type and size• Combinations with collector/redistributors• Load limitations• Material selectionLiquid Collector/Redistributors• Same as for liquid distributors• Total and effective mixing• Gas redistributionGas Distributors• Column size

• Inlet nozzle design• Available pressure drop• Turndown• Space availability• Material selectionMist Eliminators• Efficiency/capacity• Presence of solids• Gas velocity and properties• Pressure drop• Liquid load• Mist size and properties

LIQUID DISTRIBUTORSTrough type distributors are generally used in towers with high liquid rates and/or fouling service. Liquid is introduced into the parting box which properly distributes the liquid into the troughs. Generally, one parting box is used for smaller towers while multiple parting boxes are used for larger diameters or high liquid rates. Trough distributors can be made in plastics, FRP or metals and ceramics. Orifice type distributors are made in various sizes and designs. Typically all sizes have round or rectangular chimneys with a flat floor sealed to the vessel support ring. These distributors can act as bed limiters by having antimigration bars/rods in the open areas. Orifice type distributors can be made in plastics, metals or ceramics.SUPPORT PLATES/GRIDSMultibeam support plates are composed of corrugated sheets perforated with slots/holes to separate gas and liquid flow paths maximizing total throughput. The slots/holes are laid out in a uniform pattern where the open area approaches or exceeds the cross-sectional area of the tower. The slots/holes sizes are such that the packing do not fall through them. The angle of corrugation, height and width of each beam varies with design and material used. Multibeam support plates are available in various metals, plastics and ceramics.MIST ELIMINATORSKnitted wire filament mist eliminators are available in various densities, filament sizes and surface areas to suit specific process conditions for maximum removal of mist and micron-size droplets. Mist eliminators can be made in various metals and plastics. Additionally, our random and structured packing can be used as mist eliminators. Chevron and plate type mist eliminators are suitable for high liquid load, dirty services and high capacities. They can be applied in horizontal flow or used in vertical upflow and they can be made in sections to be installed through a manway. Chevron mist eliminators can be made in plastics or metals.CUSTOM INTERNALSSpecial internals for liquid and gas distribution can also be provided. Fabco has experience in flashing feed, collector tray, and sparger designs.BED LIMITERS/HOLD DOWNBed limiters, or holddowns as they are also called, are used to limit the packing bed from moving and getting packing pieces entrained away from the bed. They are secured to the wall or loosely placed on the packing; they are made of rods and bars or in combination with screens or expanded metal, depending on the application. Bed limiters can be made in various metals and plastics.

COLLECTOR/REDISTRIBUTORSCollector redistributors are similar to the orifice liquid distributors with risers. Our model CR01 collector is composed of a flat perforated plate with round or rectangular chimneys. The risers or chimneys have caps to prevent liquid from bypassing. Redistributors are normally used when a long packed bed section has to be split up into smaller sections or when an intermediate feed is inserted in the column. Collector/redistributors can be made in various metals and plastics.

JP-7 - A CHEMICAL LIQUID FOR PREVENTING FOULING OF SCRUBBER PACKINGOne of the most common problems with air stripping and absorption towers is that over time they become fouled with solids, resulting in the loss of efficiency, capacity and increased pressure drop. Fabco has accumulated a wealth of knowledge in dealing with packing fouling problems while optimizing stripping and absorption efficiencies. The addition of JP-7 as a pretreatment will keep free iron, calcium, manganese and other minerals in suspension, preventing oxidation within the air stripping column, thus preventing a fouling problem. Typical dosages of JP-7 range from 1 to 3 gallons per million gallons of water. JP-7 is furnished in a stable, liquid form and is fed on a continual basis with a low maintenance chemical feed pump.

COLUMN INTERNALS

Fabco Plastics offers a wide variety of internals for a given function. The selection among different types of internals (i.e., liquid distributors) is made based on the characteristics of the application. Some internals operate better at high loads, some at low. Some exhibit better turndown than others. The following list summarizes the points to be considered in the selection of the proper internals.

10

2

1

www.fabcoplastics.com 9-19

9

6

7

5

3

4

8

Energy-Saving Hollow BallsYou can save money, conserve energy, and reduce air and noise pollution with Fabco hollow balls. They’re not only environmentally sound but they pay for themselves up to 6 times over per year. They just pour onto the surface and covering 91% in a single layer. Balls move out of the way for dipping and float back into position automatically. One layer reduces heat loss by 75% and evaporation by 87%; with two layers, reduction is 81% and 90% respectively. Hollow ball blankets are successfully used in many applications including anodizing, food processing, metal processing and finishing, sewage treatment, gas scrubbing, temperature retardation, and more.As well, Fabco Hollow Balls control fumes and smell, reduce evaporation and foul smell with 90%, reduce loss of valuable chemicals and fluids, save 70 – 75% energy on heated tanks, and reduce oxygen uptake.

Notes:• Other plastics are available on request.• Heat loss data available upon request.• Case quantities are 1000. • Smaller quantities available on request.

MOULDED HOLLOW BALLS Part No.

Approximate Diameter (inches)

Approximate Diameter (mm)

Weight(grams)

Balls per Pack

Quantity Needed per sq. ft.

PP 10 3/8 10 .2 1000 1076

PP 20 3/4 20 1.0 2000 270

PP 25 1 25 1.5 1000 172

PP 38 1 1/2 38 4.5 1000 74

PP 50 2 50 8.0 1000 43

PP 70 2 3/4 70 16.0 300 22

PP 100 4 100 30.0 100 10

PP 150 6 150 90.0 50 4.8

PRECISION GROUND SOLID BALLSDiameter Nylon Delrin Acrylic PP HDPE Teflon

1/8 NY125 DL125 - PP125 HDPE125 TEF125

5/32 NY156 DL156 - PP156 HDPE156 TEF156

3/16 NY187 DL187 - PP187 HDPE187 TEF187

1/4 NY250 DL250 ACR250 PP250 HDPE250 TEF250

5/16 NY312 DL312 - PP312 HDPE312 TEF312

3/8 NY375 DL375 ACR250 PP375 HDPE375 TEF375

1/2 NY500 DL500 ACR250 PP500 HDPE500 TEF500

9/16 NY562 DL562 - - - -

5/8 NY625 DL625 ACR625 PP625 HDPE625 TEF625

3/4 NY750 DL750 - PP750 HDPE750 TEF750

7/8 NY875 DL875 - - - -

1 NY1000 DL1000 ACR1000 PP1000 HDPE1000 TEF1000

ENERGY-SAVING HOLLOW BALLS

10

1

2

9-20 Toronto, Edmonton, Saskatoon, Vancouver, Montreal

9

6

7

5

3

4

8

The Fabco eliminator Type LTV 1500 is designed for vertical gas flow. It has been developed to give high efficiency mist elimination with low pressure drop. The multi-chamber profile causes the liquid droplets caught to be moved out of the gas stream such that they can drain back to the process without re-entrainment. We recommend operating conditions that consist of an inlet velocity of 4 m/s, and operating velocity of between 2.5 and 6 m/s. The LTV 1500 is available in Polypropylene, PVDF, and 304/316 Stainless Steel. Other materials like Polystyrene, Noryl, PVC, CPVC, PPO, and ABS are available upon request. The gas and the entrained liquid droplets are deflected by means of the vanes of the profile. The droplets impinge on the walls of the profiles by inertial forces. Ribs placed on the surface of the profile cause the captured liquid to flow down the sides where it can fall back into the process without re-entrainment.

LTV 1500 ELIMINATOR MODULES PART NO. MATERIAL MODULE WIDTH LTV1500 POLYPRO 12" or 24" LTV1520 PVC 12" or 24" LTV1530 CPVC 12" or 24" LTV1540 PVDF 12” or 24"

LTV2415 * ABS (BLACK) 12" or 24" LTV2415C ABS (CLEAR) 12" or 24" LTV1520C PVC (CLEAR) 12" or 24"

Notes:• LTV2415 ABS (Black) are Fire Retardant modules.

Features• High efficiency mist elimination

combined with very low pressure drop.

• Compact size finds wide application.

• Can be retrofitted to scrubbers and other process equipment.

• Available in a full range of corrosion resistant materials.

Applications• Downstream of gas

scrubbers, especially spray scrubbers and packed columns.

• Fitted also to acid coolers, evaporating coolers and evaporators.

Eliminator Type LTH 2000The Fabco Mist Eliminator, Type LTH 2000 is a profile eliminator for horizontal gas flow. It operates at high velocity and captures droplets down to approximately 10 micron diameter. An important aspect of this design is that it has a drain channel which positively prevents the captured liquid from being re-entrained into the gas stream. The sophisticated aerodynamic design of the profiles cause the elimination of liquid droplets by inertial forces. The profiles are designed with a main drain channel to capture the bulk of the captured liquid and a number of small drain channels to prevent reentrainment downstream of the venture like throat. By this combination of drain channels the captured liquid droplets are prevented from re-entering.

LTH 2100 BLADES PART NO. MATERIAL LTH2100 PVC LTH2400 PP.

Notes:• We supply modular packs of profiles for installation into existing housings, towers or vessels and complete units

with housing for pressure or vacuum operation• We recommend operating conditions that consist of an inlet face velocity of 2.5 - 6 m/s, and up to 12 m/s with

two stages or more for a single stage of eliminators.• Also available in ABS, PVDF, Carbon Steel, Galvanized Steel, or Stainless Steel (304, 316) upon request.

Features• Removal efficiency 99.9% of limit

drop size droplets and larger.• High face velocity which results in

com pact units.• Two profiles available, one with a

single drain channel, the other with three to suit different applications.

• Easy to clean.

Applications• Downstream of scrubbers,

especially spray scrubbers or towers.

• Process gas cleaning• Evaporators• Acids mists from electroplating

and electro-deposition plants.

Eliminator Type LTV 1500

ELIMINATORS