Drift Preventing Plates for Liquid Column Absorption Towers
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Solution Overview
Problem
In liquid column absorption towers, increasing exhaust gas flow velocity leads to uneven liquid drop dispersion and channeling due to gas drift, which degrades absorbing performance, especially in larger systems.
Innovation Solution
The implementation of drift preventing plates at the liquid top portion and/or columnar liquid drop dispersing members above or below the spray header helps maintain even liquid drop dispersion and prevents channeling, ensuring improved gas-liquid contact efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow velocity of exhaust gas is increased to improve gas-side mass transfer resistance and absorbing performance, then the absorbing performance is improved, but liquid drops disperse unevenly and channeling is produced locally by gas drift
Solution Approach 1:
Drift preventing plates are introduced as intermediary structures between the gas flow and liquid drops. These plates intercept and redirect the gas drift that would otherwise cause uneven liquid drop dispersion and channeling, allowing high gas flow velocities to be maintained while preserving uniform liquid distribution and effective gas-liquid contact.
2Productivity
If the size of absorption tower is increased to handle larger gas volumes, then the processing capacity is increased, but channeling and uneven liquid drop dispersion occur more readily
Solution Approach 1:
The absorption tower is segmented into multiple sections by drift preventing plates arranged at different heights and positions. This segmentation divides the large tower into smaller flow zones, preventing gas drift from causing channeling across the entire tower cross-section. Each segment maintains better liquid drop dispersion control, ensuring reliable absorbing performance even in large-scale towers.
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 configuration enhances absorbing performance by maintaining uniform liquid drop dispersion and preventing channeling at higher gas flow velocities, thereby increasing the gas-liquid contact area and improving desulfurization efficiency.
Implementation Method 1
a liquid column is formed by spraying (injecting) the absorbing solution upward from a spray header
Implementation Method 2
The absorbing solution, which is injected from the spray header and sprayed upward, disperses in a top portion, and then falls
Implementation Method 3
The falling absorbing solution and sprayed-up absorbing solution collide with each other to form fine particles
Implementation Method 4
exhaust gas is effectively entangled with the blowup flow of absorbing solution in the vicinity of a nozzle, so that the absorbing solution and exhaust gas are effectively mixed with each other
Implementation Method 5
drift preventing plates are provided in a liquid top portion of a liquid column formed by the absorbing solution and/or at the installation position of the spray header
Implementation Method 6
a columnar liquid drop dispersing member is provided on the upper side and/or the lower side of the spray header
Implementation Method 7
exhaust gas introduced from a lower part of the absorption tower and the absorbing solution injected from the spray header are brought into gas-liquid contact with each other, by which desulfurization of exhaust gas is accomplished
Data Source
AI summary
A liquid column type exhaust gas treatment apparatus comprising a spray header (2) for injecting an absorbing solution upward in an absorption tower (1), wherein exhaust gas introduced from a lower part of the absorption tower (1) and the absorbing solution injected from the spray header (2) are brought into gas-liquid contact with each other, by which desulfurization of exhaust gas is accomplished, characterized in that drift preventing plates (5a and 5b) are provided in a liquid top portion of a liquid column (6) formed by the absorbing solution and/or at the installation position of the spray header (2).