Specialized Column Internals & Tray Systems

 

Pingxiang DAIER supplies specialized column internals for distillation, absorption, stripping and other gas-liquid mass-transfer equipment. Our range includes guided float valve trays, bubble cap trays, fixed valve trays and packing support grids, with material, dimensions, segmentation, valve arrangement and support structure customized according to column diameter, process conditions and installation requirements. These internals are available for new column construction, revamp, retrofit and replacement projects.

 

Guided Float Valve Tray

Guided Float Valve Trays use movable valve elements with guide structures to control vapor flow through the tray deck and maintain stable vapor-liquid contact over a wide operating range. They are used in distillation, absorption, stripping and other mass-transfer columns where operating flexibility and hydraulic stability are important. Compared with simple perforated trays, guided valve designs can provide more controlled vapor release through the active tray area. Pingxiang DAIER can customize tray diameter, valve quantity, valve arrangement, downcomer configuration, segmentation, material and installation structure according to column drawings and process requirements. Guided float valve trays can be supplied for new equipment, column revamp and replacement projects.

Bubble Cap Tray

Bubble Cap Trays use risers and cap assemblies to direct vapor through slots into the liquid layer on the tray, creating controlled vapor-liquid contact inside the column. They are widely used in distillation, absorption and process applications where stable operation at varying vapor loads is required. Bubble cap tray systems can be designed with different cap diameters, riser heights, tray spacing, downcomer arrangements and segmented tray sections according to column geometry and operating conditions. Pingxiang DAIER supports custom fabrication based on customer drawings, existing tray samples or process requirements for new installations, retrofit work and replacement of existing column internals.

Specialized Column Internals for Tray & Packed Column Systems

 

Pingxiang DAIER supplies engineered column internals for vapor-liquid contacting, liquid distribution and tower revamp applications. The products below represent different internal functions rather than variations of the same component, covering tray operation, packed-bed irrigation and replacement requirements in chemical and process columns.

Guided Float Valve Tray

Guided Float Valve Trays are designed for columns where vapor load may vary during operation. The guided valve structure allows the valve element to respond to changing vapor flow while maintaining controlled vapor passage through the tray deck. This type of tray is commonly considered for process units requiring operating flexibility, stable vapor-liquid contacting and replacement of existing movable-valve tray systems.

Bubble Cap Tray Assembly

Bubble Cap Trays use risers and slotted caps to route vapor through the liquid retained on the tray. Their enclosed vapor path makes them suitable for applications where maintaining vapor-liquid contact at relatively low vapor rates is important. Pingxiang DAIER can support complete bubble cap tray assemblies as well as replacement sections for existing columns where original tray geometry needs to be reproduced.

Mist Eliminators for Gas-Liquid Separation

Pingxiang DAIER supplies vane-type and wire-mesh mist eliminators for scrubbers, absorption towers, process columns and gas-liquid separation equipment. Different shapes, segmentation methods, blade structures, mesh densities and materials can be customized according to tower dimensions, droplet size, gas velocity and operating conditions.

 

Rectangular Vane Mist Eliminator Modules

Rectangular vane mist eliminator modules are designed for scrubbers, ducts and process equipment requiring modular gas-liquid separation. The sectional construction makes transportation, installation and replacement easier, especially for large equipment or restricted access openings.

Chevron Vane Mist Eliminator

Chevron vane mist eliminators use shaped blade passages to capture entrained liquid droplets as the gas stream changes direction through the vane pack. Blade profile, spacing, depth and material can be selected according to gas velocity, droplet-loading conditions and pressure-drop requirements.

Segmented Vane Mist Eliminator

Segmented vane mist eliminators are manufactured in multiple sections for large-diameter towers and scrubbers. The segmented design allows the complete round assembly to be installed through tower manways while maintaining the required overall diameter and separation area.

Rectangular Wire Mesh Mist Eliminator

Rectangular wire mesh mist eliminators use knitted mesh pads to remove fine entrained droplets from gas streams. Mesh density, wire diameter, pad thickness, support frame and module dimensions can be customized for wet scrubbers, absorption systems and other gas-treatment equipment.

 Engineered Column Internals for Liquid Distribution & Tray Systems

Pingxiang DAIER supplies custom-engineered column internals for packed towers and tray columns, including liquid distributors and tray assemblies designed for uniform flow distribution, stable vapor-liquid contact, and reliable long-term operation. The products below represent different internal functions for absorption, distillation, stripping, and scrubbing applications.

Perforated Pipe Liquid Distributor

Perforated pipe liquid distributors use multiple drilled branch pipes to distribute liquid across the packed bed. The arrangement can be designed according to tower diameter, liquid flow rate and required irrigation density.

Flanged Pipe Liquid Distributor

Flanged pipe liquid distributors feature a central flanged inlet connected to multiple distribution branches, allowing convenient installation, removal and maintenance in packed towers.

Header Pipe Liquid Distributor

Header pipe liquid distributors use a central header to feed multiple lateral distribution pipes. Branch spacing, pipe diameter and discharge arrangement can be customized according to tower geometry and process conditions.

Trough-Type Liquid Distributor

Trough-type liquid distributors use multiple channels to distribute liquid across the tower cross-section. They are commonly used in larger packed towers where uniform liquid coverage and controlled distribution are important.

Packing Support, Valve Components & Liquid Collection Internals

Pingxiang DAIER supplies specialized column internals for packing support, tray operation and liquid collection in packed and tray columns. These components can be customized according to tower diameter, packing load, process conditions and replacement requirements.

Guided Elliptical Float Valve

Guided elliptical float valves are individual movable valve components used in valve trays to regulate vapor flow through the tray deck. The guided structure helps maintain controlled valve movement and stable vapor-liquid contacting under changing operating loads.

Hump Support Plate

Hump support plates are designed to support random packing beds while maintaining a large open area for gas and liquid flow. The raised hump structure provides mechanical strength and helps reduce hydraulic restriction beneath the packed bed.

Segmented Packing Support Grid

Segmented packing support grids provide load-bearing support for random or structured packing in large-diameter towers. The sectional design allows easier transportation and installation through tower manways while maintaining the required support area.

Chimney Tray / Liquid Collector Tray

Chimney trays collect liquid from the section above while allowing vapor to pass through vertical chimney risers. They are commonly used between packed beds for liquid collection, withdrawal and redistribution in process columns.

Corrosion-Resistant Plastic Column Internals

Pingxiang DAIER supplies PP and PTFE column internals for corrosive packed-tower and scrubber applications. Liquid distributors, packing support plates, hold-down grids and other plastic internals can be customized according to tower diameter, chemical medium, operating temperature and installation requirements.

PTFE Riser-Type Liquid Distributor

PTFE riser-type liquid distributors are designed for highly corrosive process environments where chemical resistance is critical. The riser arrangement distributes liquid across the tower cross-section, while outlet quantity, height and overall diameter can be customized according to liquid load and tower geometry.

PP Packing Hold-Down Grid

PP packing hold-down grids are installed above the packing bed to limit packing movement and maintain bed stability during operation. The grid structure provides open flow area while helping prevent packing displacement caused by gas velocity or process fluctuations.

PP Packing Support Plate

PP packing support plates are installed beneath random packing beds to carry the packing load while maintaining sufficient open area for gas and liquid flow. Plate diameter, bar spacing and support structure can be customized according to tower size and packing requirements.

PP Trough Liquid Distributor

PP trough liquid distributors use multiple distribution channels to deliver liquid evenly across the packed bed. They are commonly used in wet scrubbers and absorption towers handling corrosive media, with trough spacing and discharge arrangement customized according to tower diameter and liquid flow rate.

PP Wire Mesh Mist Eliminators for Corrosive Gas Service

Pingxiang DAIER supplies PP wire mesh mist eliminators for wet scrubbers, absorption towers and corrosive gas-treatment systems. Diameter, pad thickness, segmentation, mesh density and support structure can be customized according to tower dimensions, gas velocity and droplet-removal requirements.

Large-Diameter Segmented PP Mist Eliminator

Large-diameter PP mist eliminators are manufactured in multiple sections for easier transportation and installation through tower manways. The segmented construction is suitable for scrubbers and absorption towers where full-size one-piece installation is not practical.

Round PP Wire Mesh Mist Eliminator with Support Grid

Round PP wire mesh mist eliminators combine a knitted mesh pad with a rigid plastic support grid to capture entrained liquid droplets from gas streams. The support structure helps maintain pad shape and stability during operation.

Segmented PP Wire Mesh Demister Pad

Segmented PP demister pads provide fine-droplet separation while allowing flexible installation in large tower diameters. Segment size, mesh thickness, density and support arrangement can be produced according to tower drawings and operating conditions.

Ceramic Tower Internals

Ceramic tower internals are designed for packed columns operating in corrosive chemical environments where metallic components may not be suitable. DAIER supplies ceramic liquid distributors, hold-down grids and support grids for acid absorption, scrubbing and other demanding tower applications. Structures can be customized according to tower diameter, packing type, liquid load and installation requirements.

Ceramic Trough Distributor

Designed for corrosive packed-column service where ceramic tower internals are preferred. Parallel ceramic trough sections distribute liquid across the tower cross-section and help improve wetting uniformity over the packing bed. The overall diameter, trough quantity, spacing and sectional arrangement can be customized according to tower size, liquid load and installation requirements.

Ceramic Trough Liquid Distributor

A multi-channel ceramic distributor consisting of a central trough and multiple lateral distribution channels. Liquid is guided through arranged openings to provide controlled coverage across the packing surface while maintaining sufficient open area for gas flow. Trough width, discharge-point spacing, opening pattern and sectional construction can be engineered according to hydraulic and tower geometry requirements.

Ceramic Hold-Down Grid

Installed above the packed bed to help keep packing securely in position and reduce movement, lifting or displacement during operation. The open ceramic structure allows gas and liquid to pass through while providing mechanical restraint to the packing layer. Diameter, opening arrangement and sectional design can be customized according to tower diameter and packing type.

Ceramic Support Grid

Installed beneath the packed bed to support the weight of tower packing while maintaining adequate gas and liquid flow area. Ceramic construction offers strong resistance to corrosive media and is suitable for acid absorption, scrubbing and other aggressive process conditions. Grid dimensions, support spacing and sectional arrangement can be designed according to packing load and tower structure.

Column Internal Applications & Project Capabilities

From custom fabrication to tower installation, Pingxiang DAIER supports column internals for distillation, absorption, gas scrubbing and large-diameter process equipment.

Distillation Column Internals

Custom trays, packing supports, distributors and other internals for distillation and mass-transfer columns.

Custom Fabrication & Production

Drawing-based fabrication of stainless steel and plastic column internals for project-specific requirements.

Process Column & Tower Projects

Engineering support for new towers, revamp projects and replacement of existing column internals.

Packing Support Installation

Packing support grids and structural internals designed for packed towers, scrubbers and absorption systems.

Large-Diameter Segmented Internals

Segmented internals for large towers, designed for transportation, manway access and on-site assembly.

Column Internals FAQ – Selection, Installation & Procurement

1. What Types of Internals Are Used in a Packed Column?

Common packed column internals include liquid distributors, liquid redistributors, packing support plates, support grids, bed limiters, hold-down grids, and liquid collectors.

Each component serves a different purpose. Liquid distributors provide liquid coverage across the packing bed, while support grids carry packing loads and allow gas and liquid to pass through the column.

Proper selection and installation of tower internals are important for stable hydraulic performance and effective gas-liquid contact.

2. How Do I Select the Right Liquid Distributor for a Packed Tower?

Liquid distributor selection depends on column diameter, liquid flow rate, operating range, fluid properties, fouling tendency, and required distribution quality.

Common designs include trough-type, pan-type, and orifice-type liquid distributors.

A suitable distributor should provide adequate liquid coverage while minimizing unnecessary hydraulic restrictions.

For project selection, customers should provide the column dimensions, operating conditions, and available installation drawings.

3. When Is a Liquid Redistributor Required in a Packed Column?

A liquid redistributor may be required when a packed column contains multiple packing beds or when liquid maldistribution becomes significant over a long packed section.

Its function is to collect and redistribute liquid before it enters the next packing section.

Redistributor requirements depend on packing type, column diameter, bed height, liquid loading, and process conditions.

The need for a redistributor should be evaluated for each tower rather than determined by a fixed packing height alone.

4. What Is the Difference Between a Packing Support Grid and a Hold-Down Grid?

A packing support grid is installed below the packed bed to carry the weight of the packing and retained liquid while allowing gas and liquid to flow through.

A hold-down grid or bed limiter is generally installed above the packing bed to restrict packing movement during high gas velocities or operating disturbances.

These components perform different functions and are not directly interchangeable.

Their dimensions and structural arrangements should be matched to the packing type and vessel design.

5. What Causes Poor Liquid Distribution in a Packed Tower?

Poor liquid distribution may result from blocked distributor openings, incorrect installation, insufficient distribution points, uneven liquid flow, or unsuitable distributor geometry.

Liquid maldistribution can reduce effective gas-liquid contact and negatively affect separation performance.

Inspection should consider distributor condition, liquid flow rates, column leveling, and packing installation.

For replacement projects, existing drawings and operating information can help identify potential equipment-related problems.

6. Can Tower Internals Be Customized for Existing Columns?

Tower internals can be manufactured to specified dimensions and configurations for new installations or replacement projects, subject to technical and manufacturing confirmation.

Depending on the equipment design, components may be supplied in sectional arrangements to facilitate installation through existing manways.

Important information includes column internal diameter, manway dimensions, support ring locations, operating conditions, and existing equipment drawings.

For replacement projects, customers can provide photographs, dimensional sketches, or samples to support preliminary manufacturing discussions.

7. What Materials Are Available for Tower Internals?

Common material options for tower internals include stainless steel grades such as SS304 and SS316L, as well as compatible plastic materials for selected applications.

Material selection depends on operating temperature, pressure, chemical composition, corrosion conditions, and mechanical requirements.

Different tower internal components may require different materials depending on their structural and operating functions.

Final material specifications should be confirmed according to the equipment design and chemical service conditions.

8. What Information Is Needed for a Tower Internals Quotation?

For an initial quotation, please provide:

Required component: liquid distributor, redistributor, support grid, hold-down grid, or liquid collector

Material grade

Column internal diameter

Component dimensions and required quantity

Available technical drawings or photographs

Installation and support arrangements

Destination country and preferred shipping terms

For equipment requiring hydraulic or structural evaluation, additional process information may be necessary, including gas and liquid flow rates, operating temperature and pressure, fluid properties, and allowable pressure drop.

Pingxiang Daier Separation Tech Co., Ltd. (DAIER) supplies industrial tower internals for packed columns and chemical separation equipment. Contact us with your specifications to discuss manufacturing requirements and obtain a quotation.

Request a Column Internals Quote

 

Contact: Lizzy Chung

Company: Pingxiang Daier Separation Tech Co., Ltd.

Email: lizzy@pxdaier.com

Main Website: www.pxdaier.com

Manufacturing base in Pingxiang, international business support in Xiamen, and technical support in Taiwan.

 

Helpful RFQ Information:Tower / column diameter · Internal type required · Material · Quantity · Operating temperature · Operating pressure · Gas and liquid flow rates · Process medium · Existing drawing or dimensions · New project / replacement / revamp · Destination country or port

Drawings, site photos, existing internal dimensions and replacement specifications are welcome for technical review.

 

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