Weir Trough Gas Inlet System for Wet Scrubber
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Solution Overview
Problem
Conventional gas inlet systems for wet gas scrubbers face issues with the buildup of suspended particles in the circulating scrubbing liquid, leading to non-uniform overflow, corrosion, and potential system failure due to external drains being costly, complex, and prone to operational disruptions.
Innovation Solution
A gas inlet system with a weir design that includes a weir duct and trough, where liquid is delivered through upper and lower trough outlets to continuously wet the interior surface of the scrubbing vessel, preventing particulate accumulation by internal drainage through the lower trough outlet and bypass, eliminating the need for external drains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external drains are used to remove suspended particles from the circulating scrubbing liquid, then particulate accumulation in the weir trough is reduced, but the system becomes more complex, costly, and prone to operational disruptions
Solution Approach 1:
The invention extracts and eliminates the external drain system from the gas inlet system, removing the complex external piping, valves, and associated components. Instead, it uses the existing weir trough geometry and internal liquid flow to achieve particulate removal, thereby simplifying the overall system while maintaining reliability
Solution Approach 2:
The weir trough is designed to be self-cleaning through its own internal liquid circulation and overflow mechanisms. The continuous liquid flow through the weir trough naturally suspends and removes particulates without requiring external drainage systems, making the system self-sufficient and more reliable
2Object-affected harmful factors
If the weir trough fills with liquid and overflows to form a protective film, then the interior surface is protected from corrosion and thermal damage, but suspended particles accumulate in the trough leading to non-uniform overflow
Solution Approach 1:
The invention implements periodic flushing action through the weir trough design, where liquid continuously circulates and periodically suspends accumulated particulates. This periodic disturbance prevents permanent settlement and maintains uniform overflow, ensuring consistent protective film formation while preserving corrosion protection
Solution Approach 2:
The invention changes the physical parameters of the liquid in the weir trough by maintaining continuous circulation and overflow. This keeps the liquid in a dynamic state with sufficient velocity to prevent particulate settlement, thereby maintaining both corrosion protection through the liquid film and uniformity of overflow
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 continuous wetting of the interior surface inhibits corrosion and effectively removes particulates, ensuring consistent operation and reducing the risk of system failure by integrating internal drainage within the gas inlet system, thus improving the reliability and efficiency of the scrubbing process.
Implementation Method 1
the upper region of the reverse jet scrubbing vessel is kept cool and cleaned by a continuously flowing liquid film produced by feeding a portion of the scrubbing liquid into the reverse jet scrubber by means of an overflow or leaping weir
Implementation Method 2
the acid gases are absorbed into the scrubbing liquid
Implementation Method 3
once absorbed, the acid gases react with a reagent, forming reaction by-products
Implementation Method 4
the gas stream must be adiabatically saturated or 'quenched'... liquid (e.g., the scrubbing liquid) is contacted with the incoming flue gas to adiabatically saturate, or 'quench,' the gas stream
Data Source
AI summary
A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.