H2S Stripper Stripping Gas for H2S NH3 Separation
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Solution Overview
Problem
Conventional two-column sour water stripping processes struggle to achieve efficient separation of hydrogen sulfide (H2S) and ammonia (NH3) in H2S strippers, leading to suboptimal purity and energy consumption.
Innovation Solution
The method involves using a stripping gas composed of carbon dioxide and an inert gas, such as Hydrogen, Helium, Neon, Argon, Krypton, Radon, diatomic nitrogen, methane, or ethane, introduced into the H2S stripper to enhance the separation of H2S and NH3 by lowering the partial pressure of H2S and providing a stripping action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional two-column sour water stripping process is used, then H2S and NH3 can be separated, but separation efficiency is insufficient and purity is suboptimal
Solution Approach 1:
The patent introduces a stripping gas composed of carbon dioxide and an inert gas into the H2S stripper, changing the physical and chemical parameters of the stripping environment. This parameter change enhances the mass transfer driving force and improves separation efficiency, achieving at least 5% improvement in separating H2S and NH3 while optimizing purity outcomes
2Productivity
If conventional stripping process is used, then separation is achieved, but energy consumption is high
Solution Approach 1:
The patent uses carbon dioxide and inert gas as intermediary substances in the stripping process. These intermediaries facilitate the separation of H2S and NH3 by providing a favorable gas phase environment for mass transfer, reducing the energy burden on heating and reflux systems while maintaining or improving separation performance
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 improves the separation of H2S and NH3 by at least five percent, reducing utility consumption and enhancing energy efficiency in the sour water stripping system.
Implementation Method 1
introducing a stripping gas consisting of carbon dioxide and a gas selected from Hydrogen, Helium, Neon, Argon, Krypton, Radon, diatomic nitrogen, methane and ethane to enhance the separation of H2S and NH3 by lowering the partial pressure of H2S
Implementation Method 2
introducing a stripping gas into the H2S stripper to enhance the separation of H2S and NH3 by lowering the partial pressure of H2S and providing a stripping action
Data Source
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AI summary
Systems and methods for enhanced separation of H2S and NH3 are provided. Specifically, the present invention includes a method for separating hydrogen sulfide and ammonia, which comprises: i) introducing a fluid mixture of the hydrogen sulfide and the ammonia into a hydrogen sulfide stripper; ii) introducing a stripping gas into the hydrogen sulfide stripper, wherein the stripping gas comprises at least one of a carbon dioxide and an inert gas; and iii) separating most of the hydrogen sulfide and the ammonia in the fluid mixture using the stripping gas in the hydrogen sulfide stripper, which forms a hydrogen sulfide stripper overheads stream and a hydrogen sulfide stripper bottoms stream.