Rotating Barrier Gas Purification for Ion Mobility Spectrometers
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Solution Overview
Problem
Existing ion mobility spectrometers require frequent manual replacement of gas purification devices, leading to high maintenance costs and inefficiencies, as desiccants need periodic replacement and regeneration, disrupting continuous operation.
Innovation Solution
A continuously operable gas purification device with a rotating barrier that alternates desiccants between a baking and working cavity, allowing for continuous operation without manual replacement, using a heating unit to regenerate desiccants and a sealing mechanism to maintain precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single gas purification device with desiccant is used, then the device structure is simple, but the desiccant requires periodic replacement and continuous operation is precluded
Solution Approach 1:
The gas purification device is divided into two separate cavities: a working cavity containing a desiccant for gas drying and a baking cavity containing a desiccant for regeneration. This segmentation allows one desiccant to be working while the other is being regenerated, enabling continuous operation without manual intervention.
Solution Approach 2:
The system implements periodic switching between the working cavity and baking cavity through a rotating barrier mechanism. The barrier rotates to alternately connect the sample gas inlet to the working cavity and the dry gas inlet to the baking cavity, creating a periodic cycle of drying and regeneration that ensures continuous gas purification.
2Productivity
If two gas purification devices are used for turn-based desiccant replacement, then continuous operation is achieved, but manual replacement is still required and maintenance cost is high
Solution Approach 1:
The system performs self-service through automated switching between working and regeneration modes. The rotating barrier automatically directs sample gas to the working cavity and dry gas to the baking cavity at appropriate times, enabling the desiccant to regenerate itself without external manual intervention. This eliminates the need for operators to manually replace or switch between purification devices.
Solution Approach 2:
The system maintains continuous useful action by ensuring that while one desiccant is drying sample gas in the working cavity, the other is being regenerated in the baking cavity. The rotating barrier ensures seamless transition between cavities, preventing any interruption in the gas purification function and eliminating downtime associated with manual replacement.
3Ease of manufacture
If desiccant is not recycled, then the purification process is simple, but the amount of desiccant consumption is high and cost increases
Solution Approach 1:
Instead of discarding spent desiccant, the system recovers it by directing dry gas through the baking cavity where the used desiccant is regenerated through heating. This recovery process restores the desiccant's moisture-absorbing capability, allowing it to be reused in the working cavity multiple times, thereby reducing desiccant consumption and cost.
Solution Approach 2:
The system changes the temperature parameter of the desiccant during regeneration. By heating the desiccant in the baking cavity to a higher temperature, moisture is removed and the desiccant's absorption capacity is restored. This parameter change enables the desiccant to cycle between used and regenerated states without replacement.
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 gas purification during detection processes, reducing labor costs and desiccant usage, while maintaining high efficiency and precision through automated desiccant recycling and regeneration.
Implementation Method 1
a heating unit (70) correspondingly provided in the baking cavity (12)... the desiccant is circularly moved in the baking cavity and the working cavity by the rotating barrier
Implementation Method 2
the moisture and impurity in the gas are removed mainly by the desiccant in the gas purification device during a gas purifying process
Implementation Method 3
a rotating mechanism (40)... connected with the rotating barrier (20) for rotating the rotating barrier (20) at intervals
Data Source
Figure 1~2
AI summary
Disclosed is a continuously operable gas cleaning device in an ion mobility spectrometer, comprising a housing (10), a dry gas supply unit (30), a rotary baffle plate (20) and a rotary mechanism (40), wherein a cylindrical cavity (11) is provided in the housing (10), the rotary baffle plate (20) is arranged along the axial direction of the cylindrical cavity (11), and the cylindrical cavity (11) is divided into a baking cavity (12) and a working cavity (13); the housing (10) is provided with a dry gas inlet (15), a dry gas outlet (16), a sample gas inlet (17) and a sample gas outlet (18), wherein the dry gas inlet (15) and the dry gas outlet (16) are both in communication with the baking cavity (12), and the sample gas inlet (17) and the sample gas outlet (18) are both in communication with the working cavity (13); the dry gas supply unit (30) is connected to the dry gas inlet (15) and supplies dry gas to the dry gas inlet (15); a heating unit (70) is correspondingly provided in the baking cavity (12); and the rotary mechanism (40) is provided in the centre of the cylindrical cavity (11) and is connected to the rotary baffle plate (20) for driving the rotary baffle plate (20) to rotate at an interval.