Reactor Inlet Velocity Equalizer for Catalyst Bed Protection
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Solution Overview
Problem
In reactor systems, the uneven distribution of vaporous reactants due to high velocity concentrations near bends in piping leads to hot spots and underutilization of catalyst, resulting in reduced productivity and premature catalyst aging.
Innovation Solution
A reactor inlet velocity equalizer is positioned within a cylindrical neck of the reactor, featuring a flange plate and longitudinally and transversely arranged vanes to minimize flow obstruction and balance velocities, ensuring even distribution across the catalyst bed without significant reactor size increase or productivity loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If baffles and vanes are used to create back pressure on the inlet stream, then reactant distribution is improved, but velocity loss and productivity are reduced
Solution Approach 1:
The equalizer changes the flow parameters by using a series of plates with varying openings to progressively reduce velocity disparities. The first plate has a smaller opening to reduce high velocities, while subsequent plates have progressively larger openings to maintain flow balance without excessive back pressure, thus improving distribution while preserving productivity.
2Stability of the object's composition
If an inert support bed with thick layer of inert material is provided, then mixing and back pressure are created to balance flow, but available reactor volume for catalyst is reduced
Solution Approach 1:
The invention extracts the flow-balancing function from the inert support bed and relocates it to the inlet neck equalizer. This removes the need for a thick layer of inert material, freeing up reactor volume for catalyst while maintaining the desired flow balance through the equalizer's plate structure.
3Stability of the object's composition
If the cylindrical neck has a smaller internal cross sectional dimension, then velocity equalization is achieved, but flow capacity is reduced
Solution Approach 1:
The equalizer segments the flow control function across multiple plates with progressively varying opening sizes. This segmentation allows the system to manage velocity equalization in stages, preventing excessive back pressure while maintaining overall flow capacity through the coordinated action of multiple plates rather than a single constricted opening.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The equalizer achieves balanced reactant distribution, optimizing catalyst usage and reactor productivity by reducing velocity disparities and minimizing back pressure, leading to longer catalyst run times and higher production efficiency.
Implementation Method 1
A reactor inlet velocity equalizer is positioned generally within the generally cylindrical neck which includes a flange equalizer plate near the top of the generally cylindrical neck of the reactor vessel and longitudinal vanes attached to the flange equalizer plate and extending toward the bottom of the generally cylindrical neck
Implementation Method 2
At least three sets of cross vanes are arranged to connect between the longitudinal vanes and extend generally transversely across the generally cylindrical neck. The equalizer further includes a top equalizer plate attached to a first set of the cross vanes to minimally obstruct flow of gaseous feedstock
Implementation Method 3
The reactor inlet velocity equalizer is arranged to interfere with high velocity gaseous flows more than it interferes with lower velocity flows such that flow that may otherwise be uneven across the neck is altered by the reactor inlet velocity equalizer to create more balanced velocities across the neck
Data Source
AI summary
The invention relates to distributing reactants more evenly across the interior space of a reactor vessel utilizing a distributor at the inlet end that initially directs the flow of reactants through a flange plate and a series of ring plates. The ring plates are physical spaced such that vapor along the wall of the inlet is mildly obstructed by the flange plate and the ring plates cause the vapor to alter course temper down any diverse velocities that may create hot spots within the catalyst bed.