Ejector Purification of Hydrogen Sulfide Gas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The Claus catalyst used in sulfur recovery is poisoned by unreacted lithium raw material present in hydrogen sulfide, leading to inefficiencies and corrosion issues in metal pipes.
Innovation Solution
A hydrogen sulfide purification method using an ejector with a cleaning liquid as a driving fluid to remove lithium raw material from a mixed gas containing unreacted hydrogen sulfide and lithium raw material, thereby preventing catalyst poisoning and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If finely powdered lithium raw material is used in the sulfurization reaction, then reaction efficiency is improved, but the lithium raw material is easily diffused into the unreacted H2S gas, causing Claus catalyst poisoning
Solution Approach 1:
The patent introduces a separation unit as an intermediary device between the sulfurization reaction unit and the Claus process unit. This separation unit removes lithium raw material and other impurities from the unreacted H2S gas before it enters the Claus process, thereby preventing catalyst poisoning while maintaining the use of finely powdered lithium raw material for high reaction efficiency
Solution Approach 2:
The patent extracts and removes the harmful lithium raw material from the unreacted H2S gas stream using a separation unit. This extraction process isolates the impurity (lithium raw material) from the useful component (H2S gas), allowing the purified gas to proceed to the Claus process without damaging the catalyst
2Productivity
If finely powdered lithium raw material is used, then reaction efficiency is improved, but corrosion of metal pipes occurs when moisture is present
Solution Approach 1:
The separation unit acts as an intermediary that removes not only lithium raw material but also moisture from the gas stream before it contacts metal piping in subsequent processes. This prevents the corrosive interaction between finely powdered lithium raw material, moisture, and metal pipes while preserving the benefits of using fine particles for reaction efficiency
Solution Approach 2:
The separation unit extracts and removes moisture along with lithium raw material from the process stream. By taking out the moisture component that enables corrosion, the system can safely handle finely powdered lithium raw material without the harmful corrosion effect on metal infrastructure
3Loss of substance
If unreacted H2S is subjected to sulfur recovery by the Claus process, then sulfur is recovered, but the lithium raw material in the unreacted H2S poisons the Claus catalyst
Solution Approach 1:
The patent applies preliminary action by performing separation and purification of the unreacted H2S gas before it enters the Claus process. The separation unit预先 removes lithium raw material and impurities, preparing the gas stream in advance to protect the Claus catalyst from poisoning while enabling successful sulfur recovery
Solution Approach 2:
The separation unit serves as an intermediary process between the sulfurization reaction and the Claus sulfur recovery process. It mediates by filtering out harmful substances from the H2S gas, allowing the Claus process to proceed reliably with protected catalyst activity
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 method effectively purifies hydrogen sulfide by removing lithium raw material, preventing catalyst poisoning and corrosion, and ensuring efficient sulfur recovery.
Implementation Method 1
removing a lithium raw material by using an ejector that utilizes a cleaning liquid as a driving fluid, from a mixed gas containing unreacted hydrogen sulfide and the lithium raw material
Data Source
AI summary
A hydrogen sulfide purification method includes removing a lithium raw material by using an ejector that utilizes a cleaning liquid as a driving fluid, from a mixed gas containing unreacted hydrogen sulfide and the lithium raw material which is generated in a process of producing lithium sulfide by a reaction of hydrogen sulfide and the lithium raw material.