Continuous Gas Flow System for Sulfur Solubility Measurement
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Solution Overview
Problem
Current methods for predicting sulfur deposition in oil and gas production environments are inadequate due to the inability to accurately determine sulfur levels in gases as they enter facilities and during temperature or pressure changes, leading to challenges in managing sulfur deposition and associated issues like corrosion and blockages.
Innovation Solution
A continuous gas flow system that simulates actual gas line conditions, allowing for the collection and measurement of sulfur solubility at varying temperatures and pressures, including low levels, by charging the gas with sulfur and controlling temperature and pressure to precipitate and collect sulfur, enabling the development of a sulfur deposition prediction model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed system of fixed volume is used for sulfur determination, then the system can simulate oilfield gaseous environment, but it is incapable of providing accurate determination of sulfur in gas
Solution Approach 1:
The patent transforms the fixed-volume closed system into a dynamic flow system where gas continuously flows through the apparatus. This allows sulfur to be continuously removed from the gas stream while maintaining controlled temperature and pressure conditions, enabling accurate sulfur determination without the limitations of fixed-volume systems.
Solution Approach 2:
The patent introduces a sulfur saturation section where gas is pre-saturated with sulfur vapor at controlled temperature and pressure before entering the analysis section. This preliminary action ensures that the gas contains sufficient sulfur for accurate measurement while allowing the system to operate in a flow mode rather than fixed volume.
2Measurement precision
If a large volume vessel is used to collect sufficient sulfur for analysis, then accurate sulfur determination can be achieved, but the cost and complexity of the pressure vessel increases at a staggering rate
Solution Approach 1:
The patent extracts sulfur from the gas stream in a continuous flow process, removing sulfur continuously as the gas flows through the system. This eliminates the need for large-volume vessels to accumulate sufficient sulfur, as sulfur is concentrated and removed progressively along the flow path.
Solution Approach 2:
The patent uses temperature and pressure changes along the flow path to control sulfur condensation and collection. By progressively lowering temperature or pressure in different sections, sulfur is selectively condensed and collected in manageable quantities without requiring excessively large vessels.
3Quantity of substance
If gas is removed from a fixed volume vessel to meet analytical requirements, then sufficient sulfur can be collected for analysis, but the pressure inside the vessel decreases and sulfur saturation level drops
Solution Approach 1:
The patent establishes continuous gas flow through the system, allowing sulfur to be continuously removed and collected without interrupting the gas supply. This continuous action maintains constant pressure and temperature conditions, preventing the pressure drop that would occur in a fixed-volume system where gas is removed.
Solution Approach 2:
The flow system serves multiple functions simultaneously: it maintains controlled temperature and pressure conditions, continuously removes sulfur from the gas stream, and allows for accurate measurement without disrupting the gas saturation equilibrium. This multi-functionality resolves the contradiction between sulfur collection and pressure maintenance.
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
This system enables accurate and precise measurement of sulfur solubility, overcoming the limitations of closed-volume laboratory methods and providing data necessary for predicting sulfur deposition in oilfield gas operations, thus improving the management of sulfur-related issues.
Implementation Method 1
the gas is cooled in a second conduit at a test temperature lower than that of the first conduit so that sulfur in the gas precipitates
Implementation Method 2
The system includes a first conduit at an elevated temperature in which the gas is charged with sulfur
Data Source
Figure 1
AI summary
A method and a system for measuring the solubility of sulfur in a test gas, comprising flowing the test gas into a first conduit (112) that is packed with elemental sulfur and maintained at an elevated temperature, introducing the test gas containing elemental sulfur into a second conduit (116) that is maintained at a lower temperature lower, flowing the test gas into a third conduit (120) of which a portion (124) is maintained at a cold temperature sufficient to result in deposition of the elemental sulfur, and calculating the sulfur solubility based on the deposited amount of elemental sulfur.