Waste argon separation system and method capable of reducing emission of cryogenic waste argon
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Solution Overview
Problem
Existing cryogenic waste argon recovery systems result in significant argon emission and waste, failing to meet user concentration requirements and leading to inefficient utilization and potential safety hazards due to high hydrogen content.
Innovation Solution
A waste argon separation system utilizing a multi-tower adsorption process with controlled valve banks, pressure equalization, and inert gas buffering to filter and regenerate cryogenic waste argon efficiently, reducing emissions and improving recovery rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If waste argon gas is directly emitted into the atmosphere, then the system complexity is reduced, but argon is wasted and emission standards are not met
Solution Approach 1:
The waste argon treatment system is segmented into multiple functional modules: a multi-tower adsorption system with separate towers for different adsorption cycles, a dehydration unit, a regeneration system, and a controlled emission system. Each module performs a specific function, allowing the complex treatment process to be managed through modular components rather than a single integrated system.
Solution Approach 2:
The system recovers argon from waste gas streams through adsorption on molecular sieve beds, separating valuable argon from impurities. The adsorbed argon is then desorbed during regeneration cycles and collected for reuse, while only the depleted gas stream is emitted. This transforms the direct emission approach into a recovery-and-reuse system that meets emission standards while reducing argon loss.
2Manufacturing precision
If adsorption towers are used to filter waste argon, then argon purity is improved, but residual gas with high argon concentration is still emitted
Solution Approach 1:
The system employs continuous cyclic operation with multiple adsorption towers working in sequence. While one tower is in the adsorption phase capturing argon from waste gas, another tower undergoes regeneration and desorption. This continuous cycling ensures that argon recovery is ongoing without interruption, and the regeneration phase captures argon that would otherwise be lost in the residual gas stream.
Solution Approach 2:
The adsorption towers operate on periodic cycles of adsorption, regeneration, and cooling. Each tower alternates between capturing argon during the adsorption phase and releasing trapped impurities during regeneration. The periodic switching between phases, controlled by valve banks, ensures that when one tower is being regenerated, another is actively recovering argon, maximizing overall recovery efficiency.
3Productivity
If waste argon with high hydrogen content is processed, then argon recovery is improved, but safety hazards increase
Solution Approach 1:
The system introduces inert gas (nitrogen or argon) as an intermediary medium in the dehydration and regeneration processes. This inert atmosphere prevents the formation of explosive mixtures with hydrogen-containing waste argon during critical operations. The inert gas displaces oxygen and creates a non-flammable environment, allowing safe processing of hydrogen-rich streams while maintaining argon recovery efficiency.
Solution Approach 2:
The system incorporates safety cushioning measures including inert gas blanketing in all vessels and pipelines before introducing hydrogen-containing waste argon, pressure relief devices, and interlock systems that prevent operation under unsafe conditions. These preventive measures are built into the system design to cushion against potential safety hazards before they can manifest, allowing aggressive argon recovery from hydrogen-rich streams.
4Speed
If waste argon flows rapidly through adsorption packing, then processing speed is improved, but contact efficiency decreases and purity is reduced
Solution Approach 1:
The system dynamically adjusts gas flow rates through programmable logic controllers that monitor tower pressure, temperature, and cycle phase. During the adsorption phase, flow rates are optimized to maximize argon capture while preventing channeling. During regeneration, flow rates are adjusted to efficiently strip impurities. This dynamic control allows the system to maintain high processing speeds while ensuring adequate contact efficiency and product purity at each stage.
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 effectively reduces argon emissions, enhances recovery efficiency, prevents safety risks, and improves the purity of collected argon by ensuring thorough contact with adsorption packing layers and controlled regeneration.
Implementation Method 1
at least two adsorption towers, a top of each of the adsorption towers being provided with an argon-rich gas outlet... waste argon can be filtered in at least one tower while being regenerated in another tower... ensuring that gas can fully contact adsorption packing layers of adsorption towers
Implementation Method 2
at least one argon reflux component, including at least one pressure equalizing tank and first pressure equalizing channels... the first pressure equalizing valve is arranged on each of the first pressure equalizing channels
Implementation Method 3
inert gas buffering to filter and regenerate cryogenic waste argon efficiently... Dangerous accidents caused by excessive hydrogen can be effectively prevented when the cryogenic waste argon enters
Data Source
AI summary
The present application discloses a waste argon separation system capable of reducing emission of cryogenic waste argon. The waste argon separation system capable of reducing emission of cryogenic waste argon includes a valve bank, at least two adsorption towers, sewage discharge channels having at least the same number as the adsorption towers, a gas inlet component, and at least one argon reflux component. The valve bank includes a gas inlet valve, an analytic control valve, and at least two sewage discharge valves. The top of each of the adsorption towers is provided with an argon-rich gas outlet, and the argon-rich gas outlet at the top of each of the adsorption towers is connected to each other to form a regeneration channel. The argon-rich gas outlet at the top of each of the adsorption towers is further connected to an argon-rich gas outlet channel.