Inline Dual Water Scrubber for Marine Gas Cleaning
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Solution Overview
Problem
Existing scrubber designs for marine vessels are space-demanding and inefficient in removing sulfur from flue gas, particularly when space is limited on ships, and they require large volumes of water, leading to challenges in meeting stringent sulfur emission standards.
Innovation Solution
An inline dual water scrubbing system with a vertical extended body, featuring separate scrubbing sections for two distinct scrubbing liquids that flow in opposite directions, allowing for efficient two-stage scrubbing with minimal space usage and the ability to operate with different liquid properties, utilizing natural buffering in seawater and chemical neutralization in fresh water systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional wet scrubber designs are used for sulfur removal, then sulfur removal efficiency is achieved, but space requirements increase significantly
Solution Approach 1:
The patent implements a nested configuration where the second scrubbing section is positioned inside or around the first scrubbing section, with the gas flow path passing through the inner section first and then the outer section. This nesting arrangement allows both scrubbing sections to occupy overlapping spatial volumes, significantly reducing the overall footprint of the scrubber while maintaining the two-stage scrubbing process for effective sulfur removal
Solution Approach 2:
The patent transitions from horizontal or dispersed scrubbing section arrangements to a vertical stacked configuration. By arranging scrubbing sections in the vertical dimension rather than spreading them horizontally, the system achieves high sulfur removal efficiency within a compact footprint, effectively trading horizontal space for vertical space utilization
2Manufacturing precision
If large volumes of water are used in scrubbing systems, then sulfur removal capacity is improved, but water management complexity and discharge volume increase
Solution Approach 1:
The patent applies different scrubbing liquids to different scrubbing sections based on local requirements. The first scrubbing section uses seawater for initial sulfur removal, while the second scrubbing section uses fresh water or gray water for final polishing. This localized approach optimizes water usage in each section, achieving high sulfur removal capacity while minimizing total water consumption and simplifying discharge management
Solution Approach 2:
The patent changes the chemical composition parameter of the scrubbing liquid between sections. By transitioning from seawater (with natural buffering capacity) in the first section to fresh water or gray water in the second section, the system optimizes the chemical neutralization process at different stages of sulfur removal, improving overall removal capacity while reducing total water volume requirements
3Device complexity
If single scrubbing liquid systems are used, then system simplicity is maintained, but flexibility in handling different operating conditions is reduced
Solution Approach 1:
The patent divides the scrubbing system into separate sections, each capable of using different scrubbing liquids independently. The first scrubbing section can use seawater while the second uses fresh water or gray water, allowing flexible adaptation to different operating conditions, port restrictions, and environmental requirements without increasing overall system complexity
Solution Approach 2:
The patent designs the scrubber to universally handle multiple types of scrubbing liquids (seawater, fresh water, gray water) within a single integrated system. Each scrubbing section is configured to accept different liquid types, enabling the system to adapt to various port restrictions, environmental conditions, and operational requirements while maintaining a unified structural design
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 system achieves efficient sulfur removal with reduced space requirements, flexibility in liquid handling, and lower alkali usage, meeting stringent sulfur emission standards while optimizing costs and environmental impact.
Implementation Method 1
To remove sulphur from the gas the main principle consists in letting the gas react with water to form sulphuric acid
Implementation Method 2
Sea water has a natural buffering capacity for this amount of sulphuric acid
Implementation Method 3
a liquid spray means for spraying the scrubbing liquid into the gas flow in a scrubbing step
Implementation Method 4
one or more liquid collectors arranged above the one or more first scrubbing liquid spray means, the liquid collector arranged for collecting one or more the second scrubbing liquid
Data Source
AI summary
A method for dual water scrubbing and an in-line dual water scrubber for gas cleaning onboard a vessel are disclosed. The in-line dual water scrubber includes a vertical extended body, a gas inlet, and a gas outlet. The gas inlet is underlying in the lower section of the extended body and the gas outlet is overlying in the upper section of the extended body. A first underlying scrubbing section, and a second scrubbing section in an upper section of the extended body are provided. One or more liquid collectors are arranged above one or more first scrubbing liquid sprayers. The liquid collector is arranged for collecting one or more second scrubbing liquid and for flow through of a vertical upwards flowing gas-flow from the inlet to the outlet.