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Column Internals


There are various types of column internals The most common columns have internal packings designed in the form of EDV valve trays. 

All the column internals (trays, distributors etc.) are made of alloy-treated steel which provides their corossion resistance.

  Subsidiary Enterprise "BTS-ENGINEERING" performs project engineering and designing of column internals.

 

I. Liquid Distributor / Redistributor (LDT)

1.1 Trough Liquid Distributor (LDT-T)

Trough Distributor with Enhanced Baffle Plates (LDT-T01) A. Trough Distributor with Enhanced Baffle Plates (LDT-T01)
Orifices in the Sidewalls, One or two Sides. LDT-T01 can be used as a redistributor between beds (Model LDT-T01R), also can be used with a separate liquid collector.
Trough Distributor with Lateral Tubes (LDT-T02) B. Trough Distributor with Lateral Tubes (LDT-T02)
Orifices in the sidewalls, one or two sides LDT-T02 could be used as a redistributor between beds (Model LDT-T02R), also can be used with a separate liquid collector.
Trough Distributor with Base Orifices (LDT-T03) C. Trough Distributor with Base Orifices (LDT-T03)
LDT-T03 can be used as a redistributor between beds (Model LDT-T03R), also can be used with a separate liquid collector.
D. Trough Distributor with Drip Tubes and Tri-distribution System (LDT-T04) D. Trough Distributor with Drip Tubes and Tri-distribution System (LDT-T04)
Used for extremely low liquid flows. LDT-T04 can be used as a redistributor between beds (Model LDT-T04R), also can be used with a separate liquid collector.
Trough Distributor with Weirs (LDT-T05) E. Trough Distributor with Weirs (LDT-T05)
“V” notches or slots in the sidewalls, used for severely fouling systems. LDT-T05 can be used as a redistributor between beds (Model LDT-T05R), also can be used with a separate liquid collector.


1.2 Channel Distributor/Redistributor (LDT-C)

Channel Distributor with Base Orifices (LDT-C01) A. Channel Distributor with Base Orifices (LDT-C01)
Main trough and branch troughs are linked to provide uniform cross flow and lower column height.
Channel Redistributor with Base Orifices (LDT-C01R) A-1. Channel Redistributor with Base Orifices (LDT-C01R)
LDT-C01R can be used as redistributor without a liquid collector. A cap between branch troughs and wall wiper can collect and a redistribute liquid from above and also build vapour passages.
Channel Distributor with Lateral Tubes (LDT-C02) B. Channel Distributor with Lateral Tubes (LDT-C02)
LDT-C02 is one-stage distributor in which liquid is easily distributed through lateral tubes. The main trough and branch troughs are linked to provide uniform cross flow and lower column height.
Channel Redistributor with lateral tubes (LDT-C02R) B-1. Channel Redistributor with lateral tubes (LDT-C02R)
LDT-C02R can be used as redistributor without a liquid collector. A cap between branch troughs and wall wiper can collect and redistribute liquid from above and also build vapor passages. Liquid is distributed through lateral tubes.
Integral Channel Distributor with Base Orifices (LDT-C03) C. Integral Channel Distributor with Base Orifices (LDT-C03)
Main trough and branch troughs are linked to provide uniform cross flow. LDT-C03 can be used as a redistributor between beds (Model LDT-C03R), and usually works with a LCT-V type liquid collector in small columns.
Integral Channel Distributor with Lateral Tubes (LDT-C04) D. Integral Channel Distributor with Lateral Tubes (LDT-C04)
LDT-C04 can be used as a redistributor between beds (Model LDT-C04R), and usually works with a LCT-V type liquid collector in small columns.
 Channel Distributor with Weirs (LDT-C05) E. Channel Distributor with Weirs (LDT-C05)
“V” notches or slots in the sidewalls, used for severely fouling systems. LDT-C05 can be used as a redistributor between beds (Model LDT-C05R), also can be used with a separate liquid collector.

1.3 Deck Distributor/Redistributor (LDT-D)

Deck Distributor with Rectangular Risers (Bottom Orifices) (LDT-D01) A. Deck Distributor with Rectangular Risers (Bottom Orifices) (LDT-D01)
Orifices are located in the bottom plate with rectangular gas risers.
Deck Redistributor with Rectangular Risers (Base Orifices) (LDT-D01R) A-1. Deck Redistributor with Rectangular Risers (Base Orifices) (LDT-D01R)
LDT-D01R can be used as redistributor without a liquid collector. Caps are added to the gas risers in order to collect liquid.
Deck Distributor with Round Risers (Base Orifices) (LDT-D02) B. Deck Distributor with Round Risers (Base Orifices) (LDT-D02)
Orifices are located in the bottom plate with round gas risers.
Deck Redistributor with Round Risers (Base Orifices) (LDT-D02R) B-1. Deck Redistributor with Round Risers (Base Orifices) (LDT-D02R)
LDT-D02R can be used as redistributor without liquid collector. Caps are added to the gas risers in order to collect liquid.
Deck Distributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-D03) C. Deck Distributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-D03)
LDT-D03 is used when there is a large turn-down ratio. Orifices are located at the gas riser wall to match the drip tubes.
Deck Redistributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-D03R) C-1. Deck Redistributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-D03R)
LDT-D03R is used when there is a large turn-down ratio. It can be used as a redistributor without a liquid collector. Caps are added to the gas risers in order to collect liquid.
Deck Distributor with Round Risers (Side Orifices with Drip Tubes) (LDT-D04) D. Deck Distributor with Round Risers (Side Orifices with Drip Tubes) (LDT-D04)
Orifices are located at the drip tubes.
Deck Redistributor with Round Risers (Side Orifices with Drip Tubes ) (LDT-D04R) D-1. Deck Redistributor with Round Risers (Side Orifices with Drip Tubes ) (LDT-D04R)
LDT-D04R can be used as a redistributor without a liquid collector. Caps are added to gas risers in order to collect liquid.
Dispersed Phase Distributor with Rectangular Risers and Packing Support (LDT-D05) E. Dispersed Phase Distributor with Rectangular Risers and Packing Support (LDT-D05)
Orifices are located in the bottom plate that has rectangular continuous phase risers. LDT-D05 is usually used in an
extraction column.

1.4 Pan Distributor/Redistributor (LDT-P)

Pan Distributor with Round Risers (Base Orifices) (LDT-P01) A. Pan Distributor with Round Risers (Base Orifices) (LDT-P01)
Orifices are located in the bottom plate that has rectangular continuous phase risers. LDT-D05 is usually used in an
extraction column.
Pan Redistributor with Round Risers (Base Orifice ) (LDT-P01R) A-1. Pan Redistributor with Round Risers (Base Orifice ) (LDT-P01R)
LDT-P01R has capped gas risers, can work with liquid collector model LCT-W01.
Pan Distributor with Rectangular Risers (Base Orifices) (LDT-P02) B. Pan Distributor with Rectangular Risers (Base Orifices) (LDT-P02)
Orifices are located in the bottom of the pan, which has rectangular gas risers. To avoid leakage, a passage for liquid may be created in the gap between the gas risers and inner liner wall.
Pan Redistributor with Rectangular Risers (Base Orifices) (LDT-P02R) B-1. Pan Redistributor with Rectangular Risers (Base Orifices) (LDT-P02R)
LDT-P02R has capped gas risers and can with liquid collector model LCT-W01.
Pan Distributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P03) C. Pan Distributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P03)
Orifices are located at drip tubes. To avoid leakage, a passage for liquid can be created in the gap between the gas risers and inner liner wall.
Pan Redistributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P03R) C-1. Pan Redistributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P03R)
LDT-P03R has capped gas risers and can work with liquid collector model LCT-W01.
Pan Distributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-P04) D. Pan Distributor with Rectangular Risers (Side Orifices with Drip Tubes) (LDT-P04)
Orifices are located at the gas riser wall so that they match with the drip tubes. To avoid leakage, a passage for liquid can be created in the gap between the gas risers and inner liner wall.
Pan Redistributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P04R) D-1. Pan Redistributor with Round Risers (Side Orifices with Drip Tubes) (LDT-P04R)
LDT-P04R has caps on gas risers, is available to be worked with liquid collector Model LCTW01.
Pan Distributor with V-notched Risers (LDT-P05) E. Pan Distributor with V-notched Risers (LDT-P05)
LDT-P05 is used for highly fouling systems. Both l iquid and gas pass through risers with V-notched weirs.

1.5 Pipe Type Distributor (LDT-PP)

Lateral Pipe with Orifices (LDT-PP01) A. Lateral Pipe with Orifices (LDT-PP01)
LDT-PP01 is often used when the liquid feed is pressurized.
Spider Pipe with Orifices (LDT-PP02) B. Spider Pipe with Orifices (LDT-PP02)
LDT-PP02 is often used when the liquid feed is pressurized. There can be more branches with more orifices. LDT-PP02 is usually used for dispersed phase distribution in an extraction column.
Annular Pipe with Orifices (LDT-PP03) C. Annular Pipe with Orifices (LDT-PP03)
DT-PP03 is often used when the feed is pressurized. Orifices are located at the bottom of the annular pipes.
Tubular Distributor (LDT-PP04) D. Tubular Distributor (LDT-PP04)
Liquid is first fed to the tubular box and then distributed into branch pipes. The liquid passes through the orifices in the pipes.
Quadrate Pipe Distributor (LDT-PP05) E. Quadrate Pipe Distributor (LDT-PP05)
LDT-PP05 is usually used for extraction.

1.6 Spray Nozzle Distributor (LDT-S)

Spray Nozzle Distributor (LDT-S01) A. Spray Nozzle Distributor (LDT-S01)
LDT-S01 is a piping distributor with down pipes and spray nozzles.
Shower Pipe Distributor (LDT-S02) B. Shower Pipe Distributor (LDT-S02)
LDT-S02 is a piping distributor with one shower nozzle.

1.7 Wall Wiper Liquid Redistributor (LDT-W)

Wall Wiper Liquid Re-Distributor (LDT-W01R) A. Wall Wiper Liquid Re-Distributor (LDT-W01R)
LDT-W01R is used between beds as a redistributor in a smalldiameter packing column.

II. Liquid Collector (LCT)

2.1 Trough Liquid Collector (LCT-T)

Trough Liquid Collector (LCT-T) (LCT-T01) A. Trough Liquid Collector (LCT-T) (LCT-T01)
LCT-T is resistant to heat expansion and cooling contraction. It also reduces the need for on-site welding. It can be used for total or partial draw-off and/or to feed a liquid distributor below.
   

2.2 Chimney Tray Liquid Collector (LCT-C)

Chimney Tray Liquid Collector with Rectangular Riser (LCT-C01) A. Chimney Tray Liquid Collector with Rectangular Riser (LCT-C01)
Capped rectangular gas risers are used for gas distribution and liquid collection, and liquid is drawn out from a side sump.
Chimney Tray Liquid Collector with Rectangular Riser and Main Trough (LCT-C02) B. Chimney Tray Liquid Collector with Rectangular Riser and Main Trough (LCT-C02)
Capped rectangular gas risers are used for gas distribution and liquid collection, liquid is drawn out from a central trough.
Chimney Tray Liquid Collector with Round Riser (LCT-C03) C. Chimney Tray Liquid Collector with Round Riser (LCT-C03)
Capped round gas risers are used for gas distribution and liquid collection, and liquid is drawn out from a side sump.
Chimney Tray Liquid Collector with Round Riser and Main Trough (LCT-C04) D. Chimney Tray Liquid Collector with Round Riser and Main Trough (LCT-C04)
Capped round gas risers are used for gas distribution and liquid collection, and liquid is drawn out from a central trough.

2.3 Chevron Liquid Collector (LCT-V)

Chevron liquid collector with Annular Trough (LCT-V01) A . Chevron liquid collector with Annular Trough (LCT-V01)
Liquid is collected through inclined plates and flows into the annular channel, reducing pressure drop and the need for on-site welding. It can be used for total or partial liquid draw-off and/or to feed a liquid distributor below from a ring channel welded to the column wall.
Chevron Liquid Collector with Center Trough (LCT-V02) B. Chevron Liquid Collector with Center Trough (LCT-V02)
Liquid is collected through inclined plates and flows into the center trough. LCT-V02 reducing pressure drop and the need for on-site welding. Liquid total or patial draw-off and/or feed a liquid distributor below from a central trough
welded to the column wall.

2.4 Wall Wiper Liquid Collector (LCT-W)

Wall Wiper Liquid Collector (LCT-W01) A. Wall Wiper Liquid Collector (LCT-W01)
LCT-W01 collects liquid flow from the column wall.
   
       

III. Hold Down Grid (HD)

3.1 Hold Down Grid for Random Packing (HD-R)

Hold Down Grid for Radom Packing (Attached to the Column) (HD-R01) A. Hold Down Grid for Radom Packing (Attached to the Column) (HD-R01)
HD-R01 is a grid-type bed limiter fixed to the column wall.
Hold Down Grid for Random Packing Assembled with Liquid Distributor (HD-R02) B. Hold Down Grid for Random Packing Assembled with Liquid Distributor (HD-R02)
HD-R02 is a grid-type bed limiter assembled with a liquid distributor.
Hold Down Grid for Radom Packing for A Small Column (HD-R03) C. Hold Down Grid for Radom Packing for A Small Column (HD-R03)
HD-R03 is a grid-type bed limiter assembled with a liquid distributor or attached to the column.


3.2 Hold Down Grid for Structure Packing (HD-S)

Hold Down Grid Conjunct with Liquid Distributor or Attached to the Column (HD-S01) A. Hold Down Grid Conjunct with Liquid Distributor or Attached to the Column (HD-S01)
HD-S01 is grid type bed limiter conjunct with a liquid distributor or attached to the column.
Structured Packing Hold Down Grid with Liquid Distributor Support (HD-S02) B. Structured Packing Hold Down Grid with Liquid Distributor Support (HD-S02)
HD-S02 is a grid-type bed limiter that acts as a structural support and leveling device for the liquid distributor.
       

IV. Packing Support (PST)

4.1 Structured Packing Support (PST-S)

Grid Type Packing Support (PST-S01) A. Grid Type Packing Support (PST-S01)
PST-S01 is a grid-type support set on welded bars. It has a large open area (approximately 97% free area) for gas and liquid to pass through and do not significantly add any pressure drop.
Grid Type Packing Support for Small Column (PST-S02) B. Grid Type Packing Support for Small Column (PST-S02)
PST-S02 is grid type support placed upon vertical support ring in small size column. It has a large open area (approximately 97% free area) for gas and liquid to pass through, and it does not significantly add any pressure drop.

4.2 Random Packing Gas Injection Plate (PST-R)

Hump Type Packing Support (PST-R01) A. Hump Type Packing Support (PST-R01)
PST-R01 is hump-type support that allows gas and liquid to pass through its inclined walls. It has a large open area for gas and liquid to pass through, and
it does not significantly add any pressure drop. Additionally, it can prevent leakage of random packing.
Corrugated Plate Type Packing Support (PST-R02) B. Corrugated Plate Type Packing Support (PST-R02)
PST-R02 is hump-type support that allows gas and liquid to pass through its inclined corrugated plate. It has a large open area for gas and liquid to pass through, and it does not significantly add any pressure drop.
Subway Grating Type Support (PST-R03) C. Subway Grating Type Support (PST-R03)
PST-R03 is grid-type support that has a mesh cover to prevent leakage from random packing.
Grid type packing support (PST-R04) D. Grid type packing support (PST-R04)
PST-R04 is slotted-deck support that has a mesh cover to prevent leakage from random packing. It is used in small columns.




V. Feed/Flashing Feed Distributor (FDT)

5.1 Pipe Type Feed Inlet (FDT-P)

Liquid Only Feed Inlet (FDT-P01) A. Liquid Only Feed Inlet (FDT-P01)
FDT-P01 uses down pipes for better liquid distribution.
Flashing Feed Pipe (FDT-P02) B. Flashing Feed Pipe (FDT-P02)
FDT-P02 provides two-phase flow distribution. Bottom baffles separate the liquid and vapor.
Lateral Pipe Vapor Distributor (FDT-P03) C. Lateral Pipe Vapor Distributor (FDT-P03)
FDT-P03 introduces a vapor feed at the bottom of the tower or introduces a vapor to be mixed with the column vapor.
Pipe Vapor Distributor with Baffle (FDT-P04) D. Pipe Vapor Distributor with Baffle (FDT-P04)
FDT-P04 allows for proper distribution through the addition of top baffles to the tube. This directs vapor downwards.

5.2. Streamline Annular Vapor Feed Distributor (FDT-A)

Annular Vapor Feed Distributor with Tangential Feed (FDT-A01) A. Annular Vapor Feed Distributor with Tangential Feed (FDT-A01)
0.1% entrainment rate. Uniform gas distribution. Low pressure drop. Tangential feed. Also used for flashing feed distribution.
Streamline Annular Vapor Feed Distributor (FDT-A02) B. Streamline Annular Vapor Feed Distributor (FDT-A02)
0.1% entrainment rate. Uniform gas distribution. Low pressure drop. Radial feed. Also used for flashing feed distribution.

5.3. Flashing Feed Gallery (FDT-G)

Multilateral Gallery (FDT-G01) A. Multilateral Gallery (FDT-G01)
FDT-G01 comprises a feed device with a multilateral gallery. A two-phase flow passes through the feed device and pours into gallery, where the vapor or gas separate from the liquid.
Circular Gallery (FDT-G02) B. Circular Gallery (FDT-G02)
FDT-G02 is composed by a feed device with a circular gallery. Two-phase flow comes through feed device and pours into gallery where the vapor or gas separate from liquid.

5.4. Inlet Baffle/ Diffuser (FDT-B)

 Baffle Type Diffuser (FDT-B01) A. Baffle Type Diffuser (FDT-B01)
FDT-B01 uses a V-baffle to reduce the incoming flow. With its simple structure, it can effectively separate a two-phase feed.
Multi-Baffle Type Diffuser (FDT-B02) B. Multi-Baffle Type Diffuser (FDT-B02)
FDT-B02 uses a multi-baffle to reduce the incoming flow. It can effectively separate a two-phase feed and allows for more uniform distribution.

5.5. Vane Type Vapor Feed Distributor (FDT-V)

Vane Type Vapor Feed Distributor (FDT-V01) Vane Type Vapor Feed Distributor (FDT-V01)
Effectively decreases the momentum of the inlet feed stream. Prevents bulk liquid and solids from the entering gas flow. Prevents re-entrainment of previously collected liquid. Also used for flashing feed distribution.






VI. Demister (DEM)

6.1 Streamline Vane Type Demister (DEM-SV)

6.2 Mesh Type Demister (DEM-M)

Streamline Vane Type Demister (DEM-SV) With a special design and surface treatment, DEM-SV vanes have more specific area. Streamlined vanes change the
directions of vapor and liquid flows. Mist and gas can be better separation by centrifugation with low pressure drop.
Mesh Type Demister (DEM-M) Most efficient for mist elimination. Adapts to a clean system. Common (DEM-M01), highefficiency (DEM-M02), and highcapacity (DEM-M03) models are available for different operational needs.

6.3 Vane Type Demisters (DEM-V)

6.4 Structured Packing Type Demister (DEM-SP)

Vane Type Demisters (DEM-V) The best solution if the mist contains solid particulate, viscous or sticky liquid, or a large amount of liquid. Adapts to fouling or coking systems. Structured Packing Type Demister (DEM-SP) Highly efficient mist elimination, adapts to fouling and coking systems. Vertical flow only.

6.5 Cyclone Tube Demister (DEM-CP)

6.6 Swirling Tray-Type Demister(DEM-ST)

Cyclone Tube Demister (DEM-CP) Separates mist and gas by centrifugation through cyclone pipes set on the plate. Especially beneficial in highpressure and high gas capacity scenarios. Swirling Tray-Type Demister(DEM-ST) Separates mist and gas by centrifugation through swirling trays. Mainly applied in a fouling system where the mist contains solid particulates, viscous or sticky liquids, or a large amount of liquid.
© 2005- 2017 BTS. Development by Freesia 2008.