Portable Sampling System Membrane Dryer Weight Reduction
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Solution Overview
Problem
Portable sampling systems for flue gas dehumidification are heavy due to the presence of multiple dryers, vacuum pumps, and heating equipment, making them cumbersome for operators to carry, especially when accessing high flue stacks.
Innovation Solution
Redesigning the system to integrate a single membrane dryer that replaces the heated line, operating at deep vacuum levels and with reduced purge gas flow rates, which reduces the need for extensive thermal insulation and overall weight, while maintaining effective moisture removal to low dew points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple dryers, vacuum pumps, and heating equipment are used for flue gas dehumidification, then effective moisture removal is achieved, but the system weight increases significantly
Solution Approach 1:
The patent combines multiple separate components (dryers, vacuum pumps, heating equipment) into a single integrated membrane dryer unit. The membrane dryer integrates drying functionality with vacuum operation, eliminating the need for separate heating equipment and reducing overall system weight from 12.5 kg to 2.3 kg while maintaining effective moisture removal capability
Solution Approach 2:
The membrane dryer serves multiple functions simultaneously: it acts as a dryer, operates under vacuum to enhance drying efficiency, and eliminates the need for separate heating equipment. This multi-functional design achieves effective dehumidification with significantly reduced weight and component count
2Object-affected harmful factors
If heated line with extensive thermal insulation is used to prevent condensation, then condensation is prevented, but the system weight and size increase
Solution Approach 1:
The patent replaces the mechanical heating and insulation system with a membrane-based drying mechanism operating under vacuum. Instead of using heated lines with extensive thermal insulation, the membrane dryer uses differential pressure and membrane permeability to prevent condensation and remove moisture, significantly reducing weight and size
Solution Approach 2:
The system changes the operating parameters by operating under deep vacuum conditions rather than atmospheric pressure. This parameter change allows the membrane dryer to function effectively without extensive thermal insulation, as the vacuum environment prevents condensation through pressure differential rather than thermal management
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
The redesigned system achieves more effective drying with reduced weight and size, allowing for easier portability and operation, with the dryer weighing less than 0.5 kg and the entire system weighing about 2.3 kg, compared to the prior art's 12.5 kg, while maintaining the ability to achieve dew points below 4°C.
Implementation Method 1
operating at deep vacuum levels
Implementation Method 2
single membrane dryer
Implementation Method 3
reduced purge gas flow rates
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A portable sampling system includes a sample probe, an input/output ("I/O") system, and one membrane dryer in the form of a conduit that couples the probe to the I/O system. According to a method, purge gas flows over the membrane dryer and a gas sample flows through the membrane dryer, which is in the form of tubes of a perfluorosulfonic acid material, wherein the dryer is operated under deep or near-deep vacuum and the purge gas flows at a rate that is typically less than that of the gas sample being dried.