reactor internals - HMDS Process

HMDS PROCESS - PAGE 3

The strength of HMDS process is a team with over 30 years’ experience in the oil & gas sectors that have acquired unique expertise in working on catalytic reactors and distillation columns equipment of for major process licensors such as UOP, IFP, Shell, H.TOPSOE, EXXONMOBIL, Lurgi, UHDE etc. during their careers.

It is an experience enriched by the diversification of products realized.

REACTORINTERNALS

To offer this experience to industrial companies, Euroslot Pars approached and co-operates with the Euroslot Pars company specialized manufacturer of catalytic reactors internals-, columns internals and specialist in mechanical & hydraulic design of mass transfer equipment to create a force that can provide solutions tailored to industrial projects.

We offer our customers the best solutions that meet the requirements necessary for the proper functioning of their project.

The daily challenge of our team is to achieve the best performance products which precisely meet the needs of our customers.

Reactor Internals


Reactor Internals

The down flow reactors must have internal equipment with very high resistance to collapse or buckling and the wire screen precisely meet these constraints.

Due to its strength characteristics and its very long lifespan, profile wire is used as media support in fixed bed reactors for hydrocracking and desulfurizing.

Radial flow systems produce a smooth surface in contact with catalyst, a higher yield, less pressure drop across the bed and these advantages make it a high-performance piece of equipment that fits different high-temperature processes such as: Ammonia converters, Catalytic reforming, Hydrodesulphurizing units and so forth.

Euroslot Pars propose , a wide range of internals for media retention, which are used in different process because their very high mechanical resistance, large open area, precision and design flexibility which make it a high-performance piece of equipment which fits all applications in high or low temperature.

Euroslot Pars Internals are made from welded profile wires on supports designed according to data sheets provided by the customer. This assembly is an anti-clogging process because the profile wire shape allows only two contact points and a large open area.

REACTOR INTERNALS

Reactor Internals

The wedge wire internals are used principally for the two processes below :

DOWN FLOW REACTORS

RADIAL FLOW REACTORS

We offer a wide range of products for refinery and petrochemical units such as :

Reactor internals Inlet distributor Support grid Basket Liquid Distributor Tray Quench Mixing tray Beams Centerpipe Scallops SCS Basket®


Inlet DistributorIn up flow reactor, inlet nozzle is necessary for uniform diffusion of the fluid. The inlet nozzle can be attached to the inlet flange or sitting between the two flanges to be removable

According to reactor process and the flow dynamic, the inlet nozzle can have different design that are propose wedge wire screen, perforated sheet metal, corrugated sheet in order to give the best performance

Distributor TrayThe fluid dispensing system in an axial flow reactor which plays a key role in the performance of the catalyst. The uniformity of flow distribution creates optimum conditions of catalyst use to obtain high-purity products.

Down Flow Reactor Internals


Support GridThe support grid is a retention device for the catalyst in axial flow reactors. The support grid must be designed to withstand loads of vertical processes.

The support grid may have different designs which are proposed wedge wire screen reinforced by reinforcements or beams, according to process, in order to provide the best strength.



Quench and Mixing TrayThe multi-bed reactor process often requires a cooling phase between the beds and this could be done by the injection of liquid, which is thencollected and mixed, before being redistributed to the next bed. Different designs are proposed depending on the process specification.



Outlet CollectorThe outlet collector is a retention device for the catalyst by collecting the flow from the reactor towards the outlet vessel nozzle. Several forms are considered depending on the process conditions and fluid dynamics : cylindrical, conical or hemispherical.



CenterpipeThe Centerpipe is a cylindrical element placed in the radial flow reactor center to collect or distribute the flow.

This is a key device of the process; its design should be perfectly mastered mechanically and hydraulically. Euroslot Pars specializes in catalytic reactor internal of Centerpipe , mechanically incorporating finite element analysis results by evaluating the transfer of charges between the different parts and the professionally made operational units.

The Centerpipe in wedge wire screen is fabricated following a review procedure for all critical aspects of life, respect for the open area, slot size by calibration and overall dimensional control.

Radial Flow Reactor Internals


ScallopsScallops are modules fabricated of wedge wire screen or slotted plate, placed on the reactor wall vertically so that the filtration surface is toward the center of the reactor. It is a device to replace the outer baskets. Several forms are considered depending on process conditions and fluid dynamics.



The SCS Basket ® advantages :

Designed in sectors to pass through manholes Constitute a cylinder to create uniform catalyst bed High gas flow High mechanical strength Self-supporting envelope (bursting) No contact with the inside of the reactor No conflict with the reactor wall during thermal expansion Easy assembly and dismounting Bottom sectors can be dismounted easily during maintenance

SCS Basket ®

SCS Basket ® increases process performance and reduces operating and maintenance costs in refineries and petrochemical plants.

SCS Basket ® is a catalyst support for radial flow reactors and was designed to have a high mechanical strength and facilitate installation in the catalytic reactors.

SCS Basket ® replaces classic outer basket and scallops-, to improve the performance of catalytic reactors over the time.

SCS Basket ® is presented in form of longitudinal hollow conduits which are distributed on peripheral ring around a volume containing catalyst bed.


Thermal expansion

SCS Basket® is designed to have high mechanical strength under fast temperature variations. The gap between the front and back face of two adjacent elements allows differential thermal expansion.

Contact surface

The surface in contact with catalyst is made of Wedge Wire Profile having slots along the reactor axis. Therefore, the inside face of the SCS-Basket presents a smooth surface, which prevents catalyst damage.

Elements assembly

The special saw-tooth connection is secured by use of Allen bolt. For maximum security we use an Allen bolt, which is embedded in matter of vertical and horizontal bars so no disruptive element penetrates into the catalyst bed, so as to ensure a smooth surface of contact with the catalyst.


SCS Basket ®


HMDS PROCESS - PAGE 14 HMDS PROCESS - PAGE 13

Outer Basket ®



Ammonia Converter Internals

HMDS Process has developed and patented an ammonia converter «Opti-Converter» which is designed to increase the capacity of the production unit and reduce manufacturing costs.

The unique design of the Opti-converter internals allows it to improve temperature control through the catalyst beds. The outer shell of the catalyst is double wall scallop modules designed from Wedge Wire Screen and perforated sheet for uniform distribution of fluid over the entire height of the catalyst bed.

An inner basket adapted to withstand the stress applied by the catalyst in a high temperature medium and to lighten the weight to reduce the load on the catalyst bed supports. The basket is manufactured by the Wedge wire screen assembly associated with profiles in channels which uniformly channel the fluid upwards on the cooling system so that it can traverse the entire length of the exchanger to allow the optimization of the temperature in each bed.

Opti-Converter contains internals that are fully removable through the manhole, from the reactor head, in order to ease assembly and disassembly during maintenance.

Opti-Converter Basket ®

reactor internals - HMDS Process

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