Cyclone Separator for Lithium Sulfide Purification
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Solution Overview
Problem
The sulfurization reaction between lithium raw materials and hydrogen sulfide generates unreacted H2S, which, when subjected to sulfur recovery using the Claus process, poisons the Claus catalyst and causes corrosion of metal pipes due to the presence of finely powdered lithium raw materials.
Innovation Solution
A hydrogen sulfide purification method that utilizes a cyclone to remove lithium raw materials from the mixed gas containing unreacted hydrogen sulfide and lithium raw materials, 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 diffuses into unreacted H2S and poisons the Claus catalyst
Solution Approach 1:
The patent extracts and removes lithium raw material particles from the unreacted H2S gas stream using a cyclone separator before the gas enters the Claus process. This separation prevents the lithium particles from reaching and poisoning the Claus catalyst while maintaining the use of finely powdered lithium raw material for efficient sulfurization reaction.
Solution Approach 2:
The cyclone separator acts as an intermediary device between the sulfurization reaction system and the Claus sulfur recovery system. It mediates by capturing and removing lithium particles from the gas stream, preventing direct contact between the lithium raw material and the Claus catalyst, thus protecting the catalyst while allowing the process to continue.
2Productivity
If finely powdered lithium raw material is used, then reaction efficiency is improved, but corrosion of metal pipes occurs due to coexistence with moisture
Solution Approach 1:
The cyclone separator extracts and removes lithium raw material particles from the gas stream, preventing their coexistence with moisture in the downstream metal piping. This removal eliminates the source of corrosion while preserving the benefits of using finely powdered lithium raw material in the reaction zone.
3Loss of substance
If unreacted H2S is subjected to sulfur recovery by the Claus process, then sulfur is recovered, but the Claus catalyst is poisoned by lithium raw material
Solution Approach 1:
The patent applies preliminary action by removing lithium raw material particles from the unreacted H2S stream before it enters the Claus process. This pre-treatment step ensures that the Claus catalyst is not exposed to lithium particles that would cause poisoning, while still allowing sulfur recovery to proceed efficiently.
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 prevents the poisoning of Claus catalysts and corrosion of metal pipes during sulfur recovery, ensuring the efficient production of lithium sulfide while maintaining apparatus integrity.
Implementation Method 1
A hydrogen sulfide purification method that utilizes a cyclone to remove lithium raw materials from the mixed gas containing unreacted hydrogen sulfide and lithium raw materials
Data Source
AI summary
A hydrogen sulfide purification method includes removing a lithium raw material by using a cyclone, 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.