Desalting Efficiency vs Water Consumption
Optimise wash-water chemistry and mixing controls under an asset management framework to achieve salt-removal targets without proportionally increasing wastewater generation.
CyberTRIZ analysis · OilIndustry contradiction C13-R025 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Business Context
Refinery desalters remove salts and contaminants from crude oil before atmospheric distillation, reducing corrosion and protecting downstream equipment. Higher desalting efficiency generally requires greater wash-water usage, increasing water consumption and wastewater treatment requirements.
The Contradiction
Improving desalting efficiency protects refinery equipment.
However, increased wash-water consumption raises operating costs and wastewater generation.
Why the Contradiction Exists
Efficient salt removal depends on sufficient water contact and mixing, but additional water creates downstream treatment requirements.
Operational Risks
Poor desalting accelerates corrosion, while excessive water usage increases treatment costs and utility demand.
Oil Industry TRIZ Analysis
Desalter performance should be optimized by balancing water quality, mixing intensity, chemical treatment, and process control instead of relying solely on increased water consumption.
Applicable TRIZ Principles
Principle 24 – Intermediary
Principle 23 – Feedback
Principle 15 – Dynamics
Decision Tree
If salt removal remains effective, optimize water usage.
If crude quality changes, adjust operating parameters before increasing wash water.
Operational Playbook
Monitor crude quality.
Measure salt removal.
Optimize wash-water rate.
Review chemical dosage.
Validate performance.
Improve operating conditions.
Verification Metrics
Salt removal efficiency, water consumption, corrosion rate, wastewater generation, and operating cost.