Distillation Column & Amine Unit Cleaning
Distillation columns and amine units are among the most process-critical assets in any refinery, gas processing plant, or petrochemical facility. When fouling takes hold — coke, polymer deposits, amine salts, iron sulfides, heavy hydrocarbons — the consequences are measurable: reduced separation efficiency, increased energy consumption, and serious safety hazards during turnarounds.
At Tanqeb, we combine advanced chemical technologies with mechanical expertise to clean and decontaminate these complex systems thoroughly, safely, and within your turnaround window.
The Challenge: Fouling in High-Stakes Equipment
Distillation Columns
Columns operating in crude, vacuum, FCC, and coker services accumulate:
- Coke and polymer deposits in high-temperature sections
- Iron sulfides and corrosion by-products
- Tray and packing fouling that disrupts vapor-liquid contact efficiency
- Bottoms sludge and heavy hydrocarbon accumulation
Amine Units
Gas sweetening units (H₂S and CO₂ removal) face a distinct and hazardous fouling profile:
- Heat stable amine salts (HSS) that progressively reduce solvent capacity
- Pyrophoric iron sulfide deposits that can self-ignite upon air exposure
- Hydrocarbon carryover and emulsified oils
- Foaming caused by amine degradation and contaminant accumulation
- Trapped hazardous gases including H₂S, benzene, and ammonia
Traditional aggressive acid cleaning generates additional problems — acid gas evolution, extensive neutralization requirements, and large volumes of heavy metal-laden disposal waste. Tanqeb’s approach avoids these pitfalls through engineered, deposit-specific cleaning strategies.
Our Process
Engineering & Planning
Every project begins with thorough technical preparation. Our engineers work directly with your operations and turnaround teams to:
- Review unit history, operating conditions, and known fouling patterns
- Analyze deposit samples to determine composition and cleaning approach
- Develop an optimized cleaning strategy for your specific unit configuration
- Define acceptance criteria and verification methods upfront
Matching the right technique to the right deposit type — chemical dissolution, mechanical cleaning, or a combination — is what separates effective cleaning from incomplete results.
Decontamination & Gas Freeing
Before any cleaning or personnel entry, the unit is rendered fully safe. Our decontamination programs:
- Neutralize and remove hazardous sulfides and volatile hydrocarbons
- Treat pyrophoric iron sulfides to prevent ignition upon air exposure
- Eliminate H₂S, benzene, and other trapped hazardous gases
- Confirm safe atmospheric conditions prior to any vessel opening or entry
Cleaning Execution
Based on deposit analysis and unit configuration, we deploy targeted cleaning techniques including:
- Custom-formulated cleaning solutions matched to specific deposit chemistry
- Controlled circulation through all unit components
- Continuous monitoring of cleaning progress and effectiveness
- Complete removal of dissolved and loosened deposits
Verification & Documentation
The job is not complete until results are confirmed. Our close-out process includes:
Deliverable | Description |
Visual Inspection | Internal inspection with full photographic documentation |
Atmospheric Testing | Final gas testing confirming absence of hazardous substances |
Close-Out Report | Comprehensive documentation of all work performed and waste disposal certificates |
Key Benefits
Benefit | Details |
Deposit-Specific Engineering | Cleaning chemistry and methods tailored to your exact fouling composition |
Pyrophoric Hazard Management | Iron sulfide treated and rendered inert before air exposure |
Turnaround Efficiency | Optimized execution that respects your schedule and minimizes downtime |
Full Decontamination | All hazardous gases eliminated before personnel entry |
Documented Results | Complete verification reporting for regulatory and operational records |
Safety as a Foundation
Every Tanqeb column cleaning project is executed under strict confined space and atmospheric safety protocols:
- Continuous atmospheric monitoring (H₂S, benzene, LEL) during all entries
- Dedicated confined space attendants at all times
- Full Lockout/Tagout verification before any work begins
- Comprehensive emergency response plans in place throughout execution
Industries We Serve
- Oil Refineries
- Natural Gas Processing Plants
- Petrochemical Facilities
- LNG and Gas Treatment Plants
The Tanqeb Commitment
Technical expertise, proven execution, and an unwavering commitment to safety — that is what Tanqeb brings to every distillation column and amine unit cleaning project. We engineer solutions around your equipment, your deposits, and your schedule, delivering results that restore performance and protect your people.
