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We design internal internals for gas/liquid / solid hybrid reactors (wedge wire screen type) in petrochemical applications.
Reactors used in the chemical, petrochemical, and refining industries have different flow directions. This flow may be radial (Radial Flow) or vertical downwards (Down Flow). YUANLV has gained extensive experience in constructing Radial Flow and Down Flow reactor internals.
The technical level of the hydrogenation process mainly depends on the performance of the catalyst, the performance of the catalyst depends on the advancement and rationality of the reactor Internals.
Unlike wedge wire screen filter products used in other industries, Johnson Screen Reactor Internals has strict requirements on raw materials, production processes, and error control.
Through years of R&D and upgrades, our reactor's internal components can fully realize the full potential of the reactor.
Radial flow reactor internals | Down flow reactor internals |
1) Center pipe 2) Scallops 3) Outer baskets | 2) Para-Xylene (PX) Grids 3) Outlet collectors 5) Nozzles 6) Candle Filter Elements |
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The center pipe is a central slotted screen in radial flow reactors. Its outer surface contacts the catalyst layer and is made as a slit screen of triangular wire. This device holds the packing and directs the flow toward the outlet. There are versions for flow going towards the center or outwards the center. The central pipe is installed in the reactor on support elements above the outlet fitting. The flow area of the outer surface of the pipe is calculated to ensure operation within the wide range of flow rates.
1. Large screen area, minimal hydraulic resistance
2. The usage of a slit screen stops catalyst leakage and excludes clogging of slots due to the usage of triangular wire
3. Strict control of verticality and straightness tolerances
Scallops form an outer slit screen in radial flow reactors. These devices are located along the inner vessel surface. Scallops are installed inside vertical reactors and distribute or collect the flow. Scallops hold the packing, collect, and direct the flow. The outer surface of the scallop contacts the catalyst. Depending on the project’s requirements, it can be made of V wedge wire or perforated metal. It can be used to move the flow towards the center or outwards the center. Expanding rings are used to mount the scallops in the radial direction during installation. The space between the scallops and the central pipe in the upper part is closed with a blind plate. The flow area of the scallops is calculated to ensure stable operation in a wide range of flow rates.
1. Large screen area, minimal hydraulic resistance
2. The usage of a slit screen stops catalyst leakage and excludes
3. clogging of slots due to the usage of triangular wire
4. Strict control of verticality, straightness and torsion tolerances
Support grids are devices for catalyst retention in the horizontal plane of the reactor vessel.
The support grid has a prefabricated structure consisting of segments and support beams. The segments are based on triangular v wire slit screens. They are installed on a support ring and connected by various fasteners. Cord or ceramic fiber gaskets are used to seal the gaps and ensure tightness. The design features of the grid are determined according to the given loads from the catalyst layer and the pressure drop.
1. Large screen area, minimal hydraulic resistance
2 .Rigid design withstands catalyst weight and pressure drop
3. The usage of a slit screen stops catalyst leakage and excludes clogging of slots due to the usage of triangular wire
4. Assembly control on a flat surface for checking gaps, flatness tolerances and dimensional deviations
A collector/distributor uses a header pipe or a hub to which several screen tubes are attached in order to enable excellent collection or distribution of a gas or a liquid within a medium without wall effects or channeling in order to maximize efficiency.
The outer basket is an outer slit screen in radial flow reactors. It is located along the inner vessel surface. They are usually installed inside vertical reactors and distribute or collect the flow. The outer surface of the basket contacts the catalyst and is usually made of triangular wire. It can be used to move the flow towards the center or outwards the center. Outer baskets consist of segments assembled by fasteners. The space between the baskets and the central pipe in the upper part is closed with a blind plate. The flow area of the baskets is calculated to ensure stable operation in a wide range of flow rates.
1. Adopt advanced wedge wire screen ring welding technology to make the structure stronger.
2. Special surface treatment technology can increase the service life of products by 30%.
3. Increase the loading of the active catalyst.
4. Simple installation and space-saving.
Refining – Catalytic reforming, hydrocracking, hydrotreating, molecular sieve, MTBE, sulfur removal, catalyst regeneration, HDS, alkylation, isomerization, hydrogen.
Petrochemical – Ammonia conversion, paraxylene, propane, PTA, styrene monomer dehydrogenation, gas dehydration, methanol, LAB, cumene, PSA, mercury removal, benzene absorption.
Natural Gas – Molecular sieves, activated and promoted alumina, activated carbon, silica gel, amine, glycol, sulfur plant, mercury removal, IGCC, coal gasification.
YUANLV designs and manufactures a variety of radial flow reactor internals including center pipes,scallops, outer baskets, nozzles and ventilation pipes,etc.
Our products have been used in Continuous Catalytic Reforming (CCR), Styrene Monomer (SM), Ammonia Conversion, Propane Dehydrogenation (PDH) and many others.
1.
"Our collaboration with their team has been a game-changer for our sulphur removal operations. The center pipe and scallops technical expertise and innovative solutions provided have significantly improved our efficiency and product quality. We truly value this partnership and look forward to continued success together."
— Michael Anderson, Operations Manager, Texas Refining Co.
2.
"The center pipe technical support we received from your team have exceeded our expectations. You are a trusted partner in our journey towards sustainability."
— Katrin Müller, Head of Process Optimization, Berlin Refining AG
3.
"Working with your company has been an outstanding experience. Your team's proactive approach and cutting-edge technologies have helped us achieve remarkable operational efficiency. This collaboration is a testament to scallops in the Catalytic reforming projects."
— Ahmed Al-Rashid, Senior Engineer, Gulf Petrochemicals Ltd.
