Urea Reactor Light Phase Distributor Design
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Solution Overview
Problem
Traditional urea synthesis reactors face inefficiencies due to non-uniform distribution of reagents, particularly carbon dioxide, which limits reaction kinetics and results in unused reactor volume, as the vertical arrangement of distributors leads to poor contact between the light and heavy phases.
Innovation Solution
A urea synthesis reactor design featuring a light phase distributor with tubular elements and intake holes distributed transversely across the reactor's cross-section, and a heavy phase distributor oriented downwards to ensure uniform distribution of carbon dioxide and ammonia/ammonium carbamate, enhancing mixing and reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vertical distributors are used in traditional urea synthesis reactors, then the construction is simpler, but the distribution of reagents (especially carbon dioxide) becomes non-uniform, limiting reaction kinetics and leaving reactor volume unused
Solution Approach 1:
The light phase distributor is segmented into multiple tubular elements arranged radially across the reactor cross-section, each with intake holes distributed around its circumference. This segmentation allows carbon dioxide to be introduced at multiple locations simultaneously, achieving uniform distribution across the entire reactor cross-section and maximizing reaction kinetics throughout the volume.
Solution Approach 2:
The invention transitions from a vertical single-point injection approach to a radial multi-dimensional distribution system. The tubular elements extend radially outward from the central axis, with intake holes positioned at various angles and heights, creating a three-dimensional distribution pattern that uniformly disperses carbon dioxide throughout the reactor cross-section.
2Productivity
If reagents are fed through bottom distributors, then the feed system is established, but carbon dioxide forms a vertical column above the distributor, strongly limiting reaction kinetics
Solution Approach 1:
Instead of injecting carbon dioxide from the bottom upward through vertical distributors, the invention inverts the approach by introducing light phase through radially arranged tubular elements that extend horizontally across the reactor cross-section. This inversion transforms the vertical column formation into a radial distribution pattern, ensuring uniform carbon dioxide dispersion throughout the reactor volume.
Solution Approach 2:
The tubular elements are positioned at specific radial locations and angles to create locally optimized injection points. Each tubular element has intake holes positioned to target specific regions of the reactor, ensuring that carbon dioxide is distributed uniformly across the entire cross-section rather than concentrating in a vertical column above a single bottom distributor.
3Productivity
If the light phase is not uniformly distributed, then construction is simpler, but part of the reactor volume remains unused due to poor contact between phases
Solution Approach 1:
The distributor system is segmented into multiple tubular elements with intake holes distributed around each tube's circumference. This segmentation enables the light phase to be introduced at numerous locations across the reactor cross-section, ensuring uniform distribution and maximizing the utilization of the entire reactor volume for the synthesis reaction.
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
This design achieves better and more rapid mixing of reagents, leading to improved reaction efficiency and utilization of the reactor volume, with smaller carbon dioxide bubbles forming, thus increasing overall process efficiency.
Implementation Method 1
The at least one tubular element defines a plurality of spaced apart intake holes, wherein the light phase distributor is configured to distribute a light phase containing carbon dioxide to a plurality of intake points distributed transversely in the casing about the axis
Implementation Method 2
the tube portion extends downwards towards the dome-shaped bottom portion of the casing
Implementation Method 3
This design achieves better and more rapid mixing of reagents, leading to improved reaction efficiency and utilization of the reactor volume
Data Source
AI summary
A urea synthesis reactor is provided that comprises a casing extending along an axis and a first and a second inlet tube inserted through respective through openings of the casing and respectively connected, inside the casing, to a light phase distributor and to a heavy phase distributor configured to feed the reactor with a light phase containing carbon dioxide and a heavy phase containing ammonia, respectively; the light phase distributor comprises one or more tubular elements extending and/or distributed over the cross-section of the reactor and about the axis and provided with intake holes spaced apart from one another, so as to distribute said light phase in a plurality of intake points distributed transversely in the reactor and about the axis.