Desublimator Inlet Baffle Layout for Uniform Flow Distribution
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Solution Overview
Problem
Existing discontinuously operated desublimers suffer from non-uniform gas mixture flow distribution, leading to rapid pressure drops and the need for frequent regeneration, despite not reaching maximum loading capacity, especially in larger volumes.
Innovation Solution
Incorporation of a baffle in the gas inlet distributor space to uniformly distribute the gas mixture flow through the flow channels, with the baffle's geometric centroid positioned optimally relative to the inlet area to enhance uniformity and reduce pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no flow distribution device is used, then the device structure remains simple, but the gas mixture flow distribution through flow channels becomes non-uniform
Solution Approach 1:
A flow distribution device is introduced as an intermediary component between the gas mixture inlet and the flow channels. This device mediates the flow distribution by directing gas mixture flow into individual flow channels, ensuring uniform distribution without requiring complex internal structures within the flow channels themselves.
Solution Approach 2:
The flow distribution device segments the incoming gas mixture flow into separate streams that can be individually directed into each flow channel. This segmentation approach allows uniform distribution of gas mixture across multiple channels while maintaining structural simplicity of the overall system.
2Productivity
If flow distribution is non-uniform, then the desublimation process cannot be improved, but the pressure drop increases rapidly and regeneration frequency increases
Solution Approach 1:
The flow distribution device creates a flow distribution pattern that provides feedback-like uniformity across all flow channels. By ensuring each channel receives appropriate gas mixture flow, the system maintains consistent desublimation rates throughout, preventing premature pressure drop and extending regeneration intervals.
Solution Approach 2:
The invention changes the flow distribution parameters by introducing a dedicated flow distribution device that adjusts how gas mixture is distributed across channels. This parameter change ensures uniform flow velocity and pressure distribution, maximizing loading capacity before regeneration is needed.
3Manufacturing precision
If the baffle is positioned too close to the inlet, then flow distribution may be improved, but the free gas passage area is reduced and pressure drop increases
Solution Approach 1:
The flow distribution device performs partial flow distribution function - it directs gas mixture into flow channels but does not completely block the inlet region. This partial action maintains sufficient free gas passage area while achieving adequate flow distribution uniformity, avoiding excessive pressure drop.
Solution Approach 2:
The flow distribution device extends in the lateral dimension rather than blocking the flow path in the flow direction. By distributing flow across the width of the inlet rather than creating a longitudinal obstruction, the device achieves flow uniformity without significantly reducing the free gas passage area and pressure drop.
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 solution achieves more uniform desublimation across flow channel walls, reducing pressure drop and allowing longer regeneration intervals while increasing the desublimers' loading capacity.
Implementation Method 1
at least one first baffle disposed in the gas inlet distributor space for uniform distribution of the gas mixture flow through the flow channels
Implementation Method 2
the temperature of the flow channel walls is controllable such that, during a loading process, the at least one gas component to be desublimed is desublimed at the flow channel walls
Implementation Method 3
during a subsequent melting process, the at least one gas component desublimed in the loading process melts at the flow channel walls
Implementation Method 4
the pressure drop between the inlet and the outlet of the desublimer increases more quickly during the loading process
Data Source
AI summary
The invention relates to a discontinuously operated desublimator (1) for removing at least one gas component to be desublimated from a gas mixture flow, which desublimator comprises: a housing wall (7); an inlet (2) in the housing wall (7) for supplying the gas mixture flow into the desublimator (1); an outlet (6) in the housing wall (7) for discharging the treated gas mixture flow from the desublimator (1); a desublimation zone (4) with temperature-controllable flow channel walls, wherein the flow channel walls are temperature-controllable in such a way that during a loading process the at least one gas component to be desublimated is desublimated at the flow channel walls and that during a subsequent melting process the at least one gas component desublimated in the loading process melts at the flow channel walls; a gas entry distribution chamber (3), which is located between the inlet (2) and the desublimation zone (4); and a gas exit distribution chamber (5), which is located between the outlet (6) and the desublimation zone (4). According to the invention, a flow disruptor (8) is located in the gas entry distribution chamber (3) for uniformly distributing the gas mixture flow through the flow channels that result from the flow channel walls of the desublimation zone (4), the geometric centre of gravity of which flow disruption has a spacing (AT) from the geometric centre of gravity of the inlet surface (9) in the range of 0.2*D to 10.0*D, preferably in the range of 0.5*D to 3.0*D, wherein D corresponds to the equivalent diameter of a circle having the same area as the inlet surface (9) and the spacing (AT) is measured along the normal vector (nE) of the inlet surface (9). The invention also relates to a method for operating a desublimator (1) according to the invention.