Reactor internals and wedge wire screens for the petrochemical industry
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Reactor Internals and solid/liquid filtration for the Refining & Petrochemical Industry

Wedge wire screens Trislot® manufactures reactor internals using wedge wire screens (V-wire screens). Such a screen consists of surface wires that are welded onto support profiles. The distance between the surface profiles is controlled very accurately, as it forms the continuous slot opening (aperture) through which the process liquid or gas flows and by which the media (catalyst or resin) is retained in its position. Strong Self-Supporting Construction In many applications the wedge wire screen is selfsupporting due to a strong weld at each surface wire to support profile intersection....

feedstock filtration axial flow internals radial flow internals Light Naphtha Gasoline Treating Crude Distillation Heavy Naphtha Light Naphtha Isomerization Kero/Jet Fuel Sweetening F Middle Distillate Desalted Crude Oil Catalytic Condensation C4 Isomerization Gasoline Treating Selective Hydrotreating Hydrocracking Lube Base Oils Lube Base Oil Upgrading Vacuum Distillation

Typical Applications in the refining and petrochemical process Trislot® has a wide range of wedge wire reactor internals available for your media retention and solid-liquid separation processes that have been used in many types of vessels and reactors. The wedge wire reactor internals are mainly used in two types of reactor processes. Axial flow (down or up) reactors, whereby the flow of the process liquid/gas through the catalyst is from top to bottom. Radial flow reactors, whereby the flow of the process liquid/gas through the catalyst is from outside to the centre of the reactor and vice...

Trislot® has been working with worldwide Process Licensors including the following: Shell Global Solutions (SGS) Thyssenkrupp Industrial Solutions AG Haldor Topsoe (HTAS) Sasol Snamprogretti Wedge wire advantages Needless to say that the maintenance cost and risk of defects need to be minimised in refining & petrochemical applications. Strong mechanical construction Wedge wire holds the advantages that have a larger return on invest- Non-clogging surface ment than any other filter medium: No maintenance or replacement costs

1 Axial Flow Reactor Internals These reactor internals are employed for their high ability to safely retain your expensive catalyst media from migration. Wedge wire screens allow the collection of process flow across the entire reactor/vessel diameter or length. Employing the advantages of wedge wire, Trislot® offers a wide range of reactor internals designed by our engineers to your specific requirements. All screen internals are designed to fit through the reactor manway and are commonly manufactured from Stainless Steel AISI 304 / 304L / 316L / 321 / 347 / 310. Inlet Distributors...

Axial Flow Reactor Internals (cont.) Trislot® has designed and manufactured axial flow reactor internals to many customers worldwide. Catalyst Support Grid with Support Beams Large Catalyst Support Grid (4000 mm dia.) with Beams and Anti-Buckling Combs 4 sets of Scale Trap Baskets Outlet Collectors Molecular Sieve Bed Support Grid for a horizontal vessel Scale Trap Baskets

2 Radial Flow Reactor Internals These reactor internals are employed for their high-volume flow capacity with minimal pressure drop. Normally arranged with two types of concentric-positioned screens, which create an annulus filled with either static or flowing catalyst media. Also employing the advantages of wedge wire, Trislot® offers a wide range of screen internals designed by our engineers to your specific requirements. All screen internals are designed to fit through the reactor manway and are commonly manufactured from Stainless Steel AISI 316L and 321/321H / Inconel. Cover Plates and...

Radial Flow Reactor Internals (cont.) Trislot® has designed and manufactured radial flow reactor internals to many customers worldwide. Scallops and Centrepipe in position Set of Scallop with perforated liners in AISI 321 Centrepipe (length 10m) in Inconel 600 Segment of Outer Screen Centrepipe for revamp in 4 sections Outer Screen mock-up assembly

3 Feedstock Filtration Wedge wire screen elements are employed in this filtration system to remove contaminants such as coke particles and scale rust from sour water, reactor feeds and hydrocracker feeds. These contaminants from process equipment and pipelines lead to fouling of the catalyst beds. Screen elements will require backwashing to remove the buildup of filter cake. Picture with the courtesy of Asco Filtration Filter cycle Candle filter During the filter cycle, the solids are deposited on the smooth surface. This ‘cake’ acts as an extra filter for finer particles. The fines that...

Technical Information The tables below list the most commonly used Trislot® surface and support profiles used in the refining and petrochemical industry. Trislot® surface profiles Figure Trislot® support profiles The open area, Fo, is expressed in % and can be calculated using this formula: Fo = s = slot width (mm) b = width of surface profile Example: Surface profile 22S : b = 1.8 mm and Slot width : s = 0.5 mm Fo = WIRE WIDTH WIRE HEIGHT RELIEF ANGLE WELD PENETRATION SCREEN HEIGHT Quality Assurance Documentation Drawing for Approval Design Calculations • Mechanical strength of screen...

Trislot® dedicated Sales team Trislot® Quality Assurance Agent for Italy Sergio Butti buttisergio1@gmail.com Agent for France Filtr’action info@filtraction.fr ISO 9001 Certified Trislot® focuses on Total Quality Management Nico Mercier Senior Project Engineer world wide Conclusion Trislot® offers an extensive range of screen retention and filtration solutions, making us an ideal partner. Glenn Vercruyce Central & South America, UK, Scandinavia, Portugal, The Netherlands & Germany gvc@trislot.be Christophe Caenepeel Turkey, Spain, Switzerland, Austria, Eastern Europe, Belgium, Luxembourg &...