Oil in Water Analyzer Using UV Spectroscopy for Effluent Monitoring
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Solution Overview
Problem
The petroleum industry faces challenges in maximizing profitability and maintaining operational integrity due to oil carryover in effluent water streams from dewatering/desalting systems, necessitating continuous monitoring of oil concentration in these streams.
Innovation Solution
An oil in water analyzer is developed to measure hydrocarbon concentration in effluent streams using a valve system, extraction device, and spectroscopic cell, allowing for continuous process adjustments based on sample analysis, with embodiments involving the use of a water-immiscible solvent like toluene and pressurized gas to create a hydrocarbon/solvent mixture for evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If demulsifiers and electrostatic desalter are used to separate water from crude oil, then water removal efficiency is improved, but oil carryover in effluent water streams increases
Solution Approach 1:
The patent implements continuous monitoring of oil concentration in effluent water streams using UV spectroscopy. The system provides real-time feedback on oil carryover levels, enabling operators to adjust demulsifier dosage and electrostatic desalter parameters to optimize the balance between water removal efficiency and oil separation, thereby reducing harmful oil carryover while maintaining productivity.
Solution Approach 2:
The system continuously monitors and adjusts operational parameters such as demulsifier concentration, electrostatic field strength, and mixing intensity based on measured oil concentration in the effluent. By dynamically changing these parameters, the system optimizes the separation process to minimize oil carryover while maintaining effective water removal.
2Reliability
If continuous monitoring of oil concentration is implemented, then process control is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical sampling and analysis systems with a UV spectroscopic monitoring system. The UV detector continuously measures oil concentration in the effluent stream through optical absorption, eliminating the need for manual sampling, filtration, and laboratory analysis. This substitution of mechanical/chemical methods with optical detection simplifies the overall system while providing reliable continuous process control.
3Ease of manufacture
If manual sampling and analysis methods are used, then equipment cost is reduced, but measurement time and productivity are reduced
Solution Approach 1:
The patent implements continuous automated monitoring of oil concentration in effluent streams using UV spectroscopy. The system continuously draws samples, measures oil content, and provides real-time data without interruption, eliminating the discontinuous nature of manual sampling and laboratory analysis. This continuous operation dramatically increases measurement throughput and productivity while the automated nature reduces operational costs despite higher initial equipment investment.
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
Enables continuous monitoring and adjustment of dewatering/desalting operations to maintain optimal oil concentration limits, maximizing oil recovery and preventing sludge buildup, with the capability to measure 10 to 50,000 ppm of crude oil in water and automated operation for efficient data collection and system control.
Implementation Method 1
An extraction device is used for mixing a known volume of a solvent and the sample to produce a hydrocarbon/solvent mixture
Implementation Method 2
A second valve is used for transporting the hydrocarbon/solvent mixture to a spectroscopic cell where the concentration of hydrocarbons in the hydrocarbon/solvent mixture is evaluated
Data Source
AI summary
An oil in water analyzer for measuring the concentration of hydrocarbons in an effluent stream. The oil in water analyzer has a valve system for acquiring a sample from an effluent stream. An extraction device is used for mixing a known volume of a solvent and the sample to produce a hydrocarbon/solvent mixture. A second valve is used for transporting the hydrocarbon/solvent mixture to a spectroscopic cell. It is at the spectroscopic cell where the concentration of hydrocarbons in the hydrocarbon/solvent mixture is evaluated.