Thermal Analysis System Atmospheric Pressure Control
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Solution Overview
Problem
The existing thermal analysis systems face challenges in maintaining the heating unit of a thermogravimetric apparatus at atmospheric pressure during analysis, as the introduction of a carrier gas leads to pressurization, affecting physical and chemical reactions.
Innovation Solution
A thermal analysis system incorporating a supply tube, a split tube, and a vacuum tube, where the vacuum pump depressurizes the heating unit, allowing the sample gas to be analyzed at atmospheric pressure by diverting a portion of the sample gas through the split tube and venting it with a vacuum pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a carrier gas is supplied to the heating unit to enable sample gas analysis, then the sample gas can be transported to the analyzer, but the inside of the heating unit becomes pressurized, preventing analysis at atmospheric pressure
Solution Approach 1:
The gas flow path is segmented into multiple branches: a supply tube for transporting sample gas to the analyzer, a split tube for diverting excess gas, and a vacuum tube for pressure control. This segmentation allows the system to maintain atmospheric pressure in the heating unit while still enabling sample gas transport to the analyzer through the supply tube.
Solution Approach 2:
A vacuum pump acts as an intermediary device connected to the heating unit through the vacuum tube. It actively removes excess gas and maintains atmospheric pressure in the heating unit, serving as a mediator between the carrier gas supply and the pressure control requirement.
2Productivity
If the heating unit is pressurized with carrier gas, then sample gas can be supplied to the analyzer, but physical and chemical reactions of the sample are affected by pressure changes
Solution Approach 1:
The system segments the gas flow paths to separate the carrier gas supply function from the pressure control function. The supply tube delivers sample gas to the analyzer while the vacuum tube independently maintains atmospheric pressure in the heating unit, preventing pressure-induced changes in material properties and chemical reactions.
Solution Approach 2:
The system dynamically adjusts the pressure parameter in the heating unit by using the vacuum pump to maintain atmospheric pressure despite carrier gas supply. This parameter control ensures that physical and chemical reactions occur under stable atmospheric conditions, while the sample gas can still be transported to the analyzer for analysis.
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 configuration enables accurate analysis of the sample gas at atmospheric pressure within the heating unit, preventing pressure-induced changes that could alter material properties and chemical reactions.
Implementation Method 1
a vacuum pump in fluid communication with the split tube, the vacuum pump being configured to depressurize the inside of the heating unit
Data Source
AI summary
A thermal analysis system capable of analyzing a sample gas generated from a sample in a heating unit of a thermogravimetric apparatus in a state in which an inside of the heating unit is in atmospheric pressure. A supply tube connects the inside of the heating unit of the thermogravimetric apparatus and an analyzer to supply a sample gas generated from the sample heated in the heating unit to the analyzer. A split tube is branched from a flow path between the inside of the heating unit and the supply tube to cause a part of the sample gas flowing from the inside of the heating unit toward the supply tube to flow out. A vacuum pump is in fluid communication with the split tube to depressurize in the inside of the heating unit.