Elemental Analysis Dust Filter Reverse-Flow Cleaning
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Solution Overview
Problem
Existing elemental analysis devices require frequent dust filter replacements, leading to increased maintenance time and labor, which affects measurement accuracy due to dust accumulation.
Innovation Solution
The device incorporates a cleaning gas supply mechanism that flushes dust from the dust filter in the opposite direction of the mixture gas flow, using a reverse flow path with a 3-way valve to maintain analysis accuracy and reduce filter maintenance frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dust filter is used to remove dust from the mixture gas, then measurement accuracy is improved, but the filter requires frequent replacement increasing maintenance time and labor
Solution Approach 1:
The patent applies reverse flow cleaning by supplying cleaning gas to the dust filter in the opposite direction from the mixture gas flow. This backward flow flushes accumulated dust off the filter, restoring its performance without requiring replacement. The cleaning gas supply mechanism creates a counter-flow that detaches dust from the filter surface and carries it away, effectively regenerating the filter in place.
Solution Approach 2:
The dust filter performs self-cleaning through the automatic reverse flow mechanism. The cleaning gas supply mechanism enables the filter to restore its own performance by flushing out accumulated dust periodically, without requiring manual intervention or replacement. This self-service capability reduces maintenance burden while maintaining measurement accuracy.
2Measurement precision
If a dust filter is used to remove dust from the mixture gas, then measurement accuracy is improved, but the frequency of filter replacement increases leading to higher maintenance labor
Solution Approach 1:
The patent applies reverse flow cleaning by supplying cleaning gas to the dust filter in the opposite direction from the mixture gas flow. This backward flow flushes accumulated dust off the filter, restoring its performance without requiring replacement. The cleaning gas supply mechanism creates a counter-flow that detaches dust from the filter surface and carries it away, effectively regenerating the filter in place.
Solution Approach 2:
The dust filter performs self-cleaning through the automatic reverse flow mechanism. The cleaning gas supply mechanism enables the filter to restore its own performance by flushing out accumulated dust periodically, without requiring manual intervention or replacement. This self-service capability reduces maintenance burden while maintaining measurement accuracy.
3Productivity
If cleaning gas is supplied to flush dust from the filter, then filter replacement frequency is reduced, but device complexity increases due to additional flow path switching mechanisms
Solution Approach 1:
The cleaning gas supply mechanism shares the same gas supply infrastructure as the carrier gas system, using a common gas source and flow control components. The flow path switching valve integrates multiple functions by directing either carrier gas or cleaning gas to the appropriate locations based on operational mode, reducing the need for completely separate systems and minimizing additional complexity.
Solution Approach 2:
The flow path switching valve acts as an intermediary that manages the alternating between normal analysis mode and cleaning mode. This single switching component coordinates the complex sequence of gas flow changes, directing cleaning gas to the dust filter in reverse flow while preventing contamination of the analysis path, thereby simplifying the control of multiple gas streams.
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 design reduces the frequency of dust filter replacements and maintains analysis accuracy by flushing dust back into the heating furnace, minimizing the need for manual intervention and ensuring consistent measurement performance.
Implementation Method 1
a cleaning gas supply mechanism that supplies cleaning gas to the dust filter in an opposite direction from a direction in which the mixture gas is flowing
Implementation Method 2
a heating furnace in which a test sample that is placed in a crucible is heated so that a sample gas is generated from the test sample
Implementation Method 3
Concentrations of various types of components contained in the filtered mixture gas are then measured by an analysis mechanism in the form of an NDIR (Non-Dispersive InfraRed) sensor or TCD (Thermal Conductivity Detector)
Implementation Method 4
Concentrations of various types of components contained in the filtered mixture gas are then measured by an analysis mechanism in the form of an NDIR (Non-Dispersive InfraRed) sensor or TCD (Thermal Conductivity Detector)
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
In order to provide an elemental analysis device that enables the dust filter replacement frequency to be reduced, and enables the time and labor required for maintenance performed by a user to also be reduced, there is provided an elemental analysis device that includes a heating furnace 3 in which a test sample that is placed in a crucible MP is heated so that a sample gas is generated from the test sample, an inflow path L1 through which a carrier gas is introduced into the heating furnace 3, an outflow path L2 through which a mixture gas made up of the carrier gas and the sample gas is led out from the heating furnace 3, a dust filter 4 that is provided on the outflow path L2, an analysis mechanism AM that is provided on the outflow path L2 on a downstream side from the dust filter 4, and that detects one or a plurality of predetermined components contained in the mixture gas, and a cleaning gas supply mechanism R that supplies cleaning gas to the dust filter 4 in an opposite direction from a direction in which the mixture gas is flowing.