• The 3D design of the feed diffuser ensures a perfect fit with the pressure vessel nozzle and inlet pipe flange interface.

• Design includes holding and handling features to facilitate easy installation in tight nozzle spaces.

• Welding procedures are designed to monitor weld strength and enhance operational durability.

Application: Gas sweetening, gas drying, sulphur removal, hydrotreating, hydrocracking, hydrogenation, etc.

Design based on your application

In a downflow system, the inlet nozzle doubles as a manway for inserting internals and loading catalysts. The connecting pipe typically has a smaller diameter with a 90° elbow, enabling easy assembly and disassembly. The pipe is welded to a custom reduction flange, and the feed diffuser can be attached either to this flange or placed in a groove between flanges.

The feed diffuser is designed using a combination of plates, screens, and perforated plates, based on the flow dynamics of the reactor's top head and process requirements. An impingement plate is positioned to face the incoming flow, diverting it through multiple channels. Its dimensions depend on the diameter of the inlet pipe and the nozzle height.

Design Parameters

Process parameters:

The reactor's internal length, number of channels, and impingement plate design are determined by process hydrodynamics, including flow rate, gas-liquid distribution, and allowable pressure drop.

Mechanical parameters:

Both static and dynamic loads are essential factors in determining the required reinforcement.

Axial Flow Reactor and Radial Flow Reactors

The performance of catalysts in axial flow reactors heavily depends on the flow distribution system's hydraulics. Uniform flow distribution, whether in upflow or downflow operation, ensures consistent transit time, efficient catalyst utilization, and minimized deactivation. Under optimal conditions, plug flow is maintained to achieve high-purity products.

A radial reactor is a type of reactor where the gas flow direction is perpendicular to the axial direction of the equipment. It is commonly used for gas-solid catalytic reactions, as well as for non-catalytic reactions. As the reaction gas flows through the particle bed in a radial reactor, the large cross-sectional flow area, low flow velocity, and short flow path contribute to its key characteristic: a minimal pressure drop.

We manufacture critical components such as center pipes, scallops, and outer baskets for radial flow reactor vessels. We strictly adhere to ASME code requirements for carbon content in materials designed for high-temperature operation, ensuring the reliable and efficient performance of radial flow reactors.