Mini Distillation Flask for Continuous Online Petroleum Analysis
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Solution Overview
Problem
Conventional automatic distillation apparatuses for petroleum products are heavy, bulky, require large sample volumes, and have long analysis times, making them unsuitable for online analysis in industrial settings, while mini distillation devices face challenges in sample introduction and rinsing when adapted for continuous industrial use.
Innovation Solution
A method involving a small-volume analysis flask with a connecting tube at the base for sample introduction, gas injection to stabilize boiling, and solvent use for rinsing, along with a regeneration step to prevent scale buildup, allowing continuous online analysis of petroleum product samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional automatic distillation apparatuses are used, then reliable and reproducible results are obtained, but the devices are heavy and bulky
Solution Approach 1:
The apparatus is divided into separate functional modules: a heating module with a small-volume analysis flask (10-50 ml) and a separate detection module with sensors. This segmentation allows the heavy detection equipment to be isolated from the lightweight sampling module, enabling portable online analysis while maintaining reliability through modular design.
Solution Approach 2:
Traditional mechanical measurement systems (volumetric flasks, manual reading) are replaced with electronic sensors including temperature sensors, pressure sensors, and optical detectors. This substitution eliminates bulky mechanical components while maintaining measurement reliability through electronic data acquisition and processing.
2Measurement precision
If conventional distillation apparatuses are used, then accurate distillation parameters are measured, but the analysis time is long (not less than 45 min)
Solution Approach 1:
The system performs preliminary heating and stabilization of the sample before the actual distillation measurement begins. Temperature and pressure are pre-conditioned to optimal values, and the system reaches thermal equilibrium in advance, which shortens the overall analysis time while ensuring measurement precision from the start of data collection.
Solution Approach 2:
The distillation process is made continuous through automated sample introduction, continuous heating, and real-time data acquisition. Multiple samples can be processed in sequence without manual intervention between measurements, eliminating idle time and maintaining continuous useful action throughout the analysis process.
3Productivity
If mini distillation devices are used, then analysis time is reduced (about 10 minutes) and sample volume is reduced (5 to 15 ml), but sample introduction and rinsing become difficult for on-line analysis
Solution Approach 1:
The analysis flask is designed with multiple functions: it serves as both the heating vessel and the rinsing chamber. The same connecting pipe at the base is used for both sample introduction and solvent rinsing, eliminating the need for separate introduction mechanisms and simplifying the operation for online analysis applications.
Solution Approach 2:
The system performs self-rinsing by introducing solvent through the same connecting pipe used for sample introduction. The solvent automatically flushes the flask and condenser, and the system evacuates the rinsing liquid without manual intervention, making the device self-sufficient and easy to operate in online modes.
4Productivity
If successive on-line analysis of multiple samples is performed, then productivity is improved, but scale formation and obstruction issues arise
Solution Approach 1:
The system implements periodic rinsing cycles between sample analyses, where solvent is introduced through the base connecting pipe to flush away accumulating scale and deposits. This periodic maintenance action prevents obstruction of the narrow connecting pipe and heating element, allowing continuous high-productivity operation without interruption for cleaning.
Solution Approach 2:
A solvent intermediary is introduced through the connecting pipe to mediate between samples by dissolving and removing scale-forming residues. This solvent acts as a protective intermediary that prevents direct contact between accumulated deposits and the heating elements, preventing obstruction while allowing successive samples to be analyzed.
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 efficient, continuous analysis of multiple samples with reduced sample volume and analysis time, maintaining accuracy and reliability while preventing scale formation and obstruction issues.
Implementation Method 1
a heating element, in particular a heating resistor
Implementation Method 2
continuously injecting a low gas flow, in particular a flow of air or nitrogen in the connecting pipe so as to create within the sample being analyzed small bubbles likely to stabilize its boiling
Implementation Method 3
the distillation parameters of a liquid sample... the percentage of a sample evaporated according to the temperature during a distillation
Implementation Method 4
a condenser tube, a measuring test piece allowing the condensate to be collected
Data Source
Figure 1~2
AI summary
The method involves introducing a liquid sample (5) in a closed analysis flask (1) via a coupling stub (7). A heating coil (6) is controlled to bring the sample to boiling point and carry out an automatic successive in-line and continuous analysis of the sample. Another liquid sample is served as solvent in the flask to allow rinsing of residue after completion of the former sample analysis. The latter sample is evacuated from the flask via the stub by flask pressurization and gravity. A third liquid sample is introduced in the flask via the stub to carry out the analysis of third sample.