High Gravity Reactor Selective Desulfurization via Centrifugal Flow Control
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Solution Overview
Problem
Current desulfurization methods using high gravity reactors face challenges in achieving selective removal of hydrogen sulfide (H2S) while minimizing the co-absorption of carbon dioxide (CO2), leading to reduced selectivity and increased energy consumption.
Innovation Solution
The method involves a high gravity reactor with a packed bed, deflectors, and a feedback regulation control system that adjusts the rotational speed and deflector angle based on hydrogen sulfide concentration, optimizing the flow direction of gas and liquid phases to enhance mass transfer and reduce CO2 absorption, thereby improving H2S selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the absorbent is used to remove H2S from the gas stream, then the desulfurization efficiency is improved, but the co-absorption rate of CO2 increases
Solution Approach 1:
The packed bed is divided into multiple packing areas with annular grooves between them, creating distinct zones for different functions. The deflectors are segmented and annularly arranged in each groove, allowing different regions to handle different aspects of the separation process, thereby improving H2S removal while reducing CO2 co-absorption.
Solution Approach 2:
Different regions of the packed bed are given different functional qualities through the annular groove structure and deflector placement. The inner edge area of each packing area forms an end effect area with specific mass transfer characteristics, creating local zones optimized for selective H2S absorption while minimizing CO2 uptake.
2Manufacturing precision
If the circulating flow rate of the absorbent is increased to improve H2S removal, then the desulfurization efficiency is improved, but the energy required for regeneration increases
Solution Approach 1:
The invention extracts and removes CO2 from the absorption process by creating a selective separation zone through the annular groove structure. By taking out the CO2 absorption function from the overall process, the absorbent remains richer in H2S after regeneration, reducing the energy required for the regeneration cycle while maintaining high desulfurization efficiency.
3Productivity
If the contact time between gas and liquid is increased to improve mass transfer, then the absorption efficiency is improved, but the CO2 absorption increases
Solution Approach 1:
The deflectors are designed to dynamically adjust the liquid flow direction and create turbulent mixing patterns within the packed bed. This dynamic flow control enhances mass transfer efficiency for H2S while the short residence time in the end effect areas prevents excessive CO2 absorption, resolving the contradiction between contact time and selectivity.
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 approach significantly enhances the selectivity of hydrogen sulfide removal, reduces CO2 absorption, and conserves energy by optimizing the mass transfer coefficient and contact time within the reactor.
Implementation Method 1
enabling the desulfurizer to move along a direction from the inner packing area to the outer packing area under an action of centrifugal force
Implementation Method 2
This setup facilitates the transfer and absorption of hydrogen sulfide into the liquid phase
Implementation Method 3
enhancing the mass transfer of feed gas containing hydrogen sulfide
Data Source
AI summary
A selective desulfurization method implemented based on a high gravity reactor is provided, in the technical field of desulfurization separation. The selective desulfurization method includes the following steps: driving the packed bed to rotate through the driving device; introducing feed gas containing hydrogen sulfide into the reactor through the air inlet, and enabling the feed gas to enter the packed bed and move along a direction from a outer packing area of multiple areas to an inner packing area of the multiple of packing areas; introducing a desulfurizer into the packed bed through the liquid inlet, and enabling the desulfurizer to move along a direction from the inner packing area to the outer packing area under an action of centrifugal force. Deflectors can change the flow direction of the desulfurizer liquid after passing through the inner packing area.