Separation Still Machine Operator Skill: Chemical Separation and Distillation Process Expert Knowledge Base

Opening: Starting with a "Runaway" Incident

Not long agoa friend of mine was on shift at a chemical plantIn the middle of the nightthe pressure in a separation distillation column suddenly surgedIn a paniche tweaked a few parametersbut instead of fixing the issuehe made things worseeventually causing liquid carryover from the column overheadresulting in a direct loss of several dozen kilograms of productLaterduring a debriefingan experienced operator pointed out that all he needed to remember was the golden rule: "First reduce the reflux flowthen reduce the heating load." After hearing thisI thought to myself—if only there had been a quick-reference "knowledge blueprint" at handthat mishap probably wouldn't have happened.

Just recentlywhile browsing GitHubI stumbled upon a project called domain-expertswhich surprisingly includes a skill specifically named separation-still-machine-operatorTranslating it literallythat's "Separation Distillation Column Operator Skill." This is practically tailor-made for situations like my friend's!

What Exactly Is This Skill?

Simply putit packages the core knowledge of an experienced separation distillation column operator—including distillation principlesequipment structuresoperating proceduresprocess parameter tuningsafety regulationsand common fault handling—into an AI agent skillYou can install it with a single command in the terminalrun it on theplatformor download a ZIP archive to use locally.

In essenceit's like having a portable "distillation consultant" by your sideAsk it "What should I do if the column bottom temperature is too high?" and it will give you a standard answerIt's not like my friendwho had to rely on guessing from the dashboard on the spot.

Core Knowledge Module Breakdown

Although I can't directly view all the content of the SKILL.md file (since the project was just recently made public)based on the directory structure and naming conventionsthis skill at least covers the following major knowledge blocks:

• Fundamentals of Distillation Thermodynamics: Such as relative volatilityequilibrium curvesminimum reflux ratio calculations—these are the theoretical foundations for understanding the separation process.
• Equipment Structure Diagrams: Including differences between packed columns and tray columnstypes of reboilers (thermosiphonkettle-type)and condenser arrangementsEach component has corresponding operating key points.
• Startup and Shutdown Procedures: From nitrogen purgingfeedingestablishing total refluxto gradual product withdrawaland to shutdown procedures like discharging and cleaning—each step has standard actions.
• Process Parameter Adjustment Strategies: For instancethe interrelationships among reflux ratioheating loadcolumn top pressureand feed temperatureParticularlysome mnemonic-style experiencesuch as "Control temperature by controlling pressure first; adjust purity by adjusting reflux first."
• Safety Emergency Handling: Including quick judgment and response steps for abnormal conditions like overpressure relieffloodingweepingand column bumping.
• Quality Analysis and Sampling: How to determine product puritywhen to adjust side drawetc.

This knowledge is organized into structured "skill blocks." When you run it onyou can ask questions in natural languageand the AI will retrieve the most relevant steps or data for youFor exampleif you ask "What could be the possible reasons for a sudden drop in overhead product purity?" the system will list possibilities such as changes in feed compositioninsufficient reflux ratiodamaged traysand provide the corresponding troubleshooting sequence.

Installation Experience and Initial Impressions

I followed the official command to install it:

npx skills add https://github.com/wonsukchoi/domain-experts --skill separation-still-machine-operator

The process went smoothly; npm automatically downloaded the dependenciesand it was completed in a few secondsThen I opened the skill inThe interface was very cleanwith a conversation input box on the left and a knowledge panel on the rightI started with a simple question: "What effect does the feed location have on separation performance?"

The skill gave a very detailed answernot only explaining that a feed position too high results in insufficient stripping section trays and too low results in insufficient rectification sectionbut it also included a flowchart for optimizing the feed locationHonestlyit was clearer than some chemical engineering textbooks I've read before.

Then I asked a slightly trickier question: "The column bottom temperature is normalbut the overhead temperature is persistently high—what is the cause?" The skill gave three possibilities: accumulation of non-condensable gasesinsufficient reflux flowor inadequate coolant amountIt also listed verification methods for each caseThis diagnostic-style response is particularly useful for field operators.

Noteworthy Details

While this skill is powerfulthere are a few points to keep in mind when using it:

• Firstit is a general knowledge basenot specific to any particular chemical unitIf your equipment has special features (such as multi-effect distillation or heat pumps)you may need to adjust according to the specific situation.
• Secondall operational recommendations must be subject to actual safety regulationsThe skill provides auxiliary reference and cannot completely replace on-site experience.
• Thirdis this skill currently in an English interface? Actuallyjudging from the repositorySKILL.md might be written in Englishbut theplatform supports Chinese conversationsso asking in Chinese can also yield Chinese answers (if the content has been translated)If the answer comes out in Englishyou can always ask for clarification by saying "Please explain in Chinese."

My Personal Usage Experience

This weekendI deliberately used a simulation software and operated it while keeping this skill openI found it extremely friendly for newcomers—for instancewhen I performed total reflux operation for the first timethe skill prompted me to slowly increase the temperature to prevent the reboiler from running drythen gradually increase the reflux flow until the overhead temperature stabilized before starting product withdrawalFollowing the entire procedureI basically didn't run into any issues.

Howeverthere was one time I stumbled: I asked "How to improve product purity?" The skill answered "Reduce the withdrawal rate and increase the reflux ratio." But in realityat that momentthe liquid level in my column bottom was lowand if I reduced withdrawal as suggestedthe bottom might have dried upThereforeno AI skill can be separated from on-site instrument data—this must always be kept in mind.

A Final Word

Separation distillation is extremely common in chemical productionpresent in almost every chemical plant