Gas Sampling Probe with Central Purge for Dusty Flue Gas

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Solution Overview

Problem

Existing gas sampling apparatuses face challenges in efficiently monitoring flue gas content in extreme conditions due to solid particle adhesion, leading to deterioration and reduced efficiency, especially in high-temperature environments like cement kilns.

Innovation Solution

A gas sampling apparatus with a separate central purge system for cleaning and a sample system for extraction, utilizing a filter to remove solid particles and a central purge pipe for cleaning the tip, allowing efficient and continuous monitoring without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the gas sampling apparatus is placed in harsh environments with high dust loads, then the ability to monitor flue gas content is improved, but solid particles adhere to the equipment causing deterioration of sampling efficiency and increased maintenance time

Engineering Contradiction:

Improvesampling efficiencyVSAvoidmaintenance time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The gas sampling apparatus performs self-cleaning through an integrated purge system that automatically removes solid particle aggregates from housing surfaces using a gaseous medium, eliminating the need for manual cleaning and maintaining sampling efficiency continuously

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The purge system performs preliminary cleaning action by removing solid particle aggregates before they can block the housing opening or sample pipe openings, preventing deterioration of sampling efficiency before it occurs

Inventive Principle:

Principle #10Preliminary action

2Reliability

If manual cleaning is performed frequently to remove solid particle buildup, then sampling efficiency is maintained, but equipment lifespan is reduced due to frequent maintenance interventions

Engineering Contradiction:

Improvesampling efficiencyVSAvoidequipment lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The automated purge system enables the apparatus to clean itself without manual intervention, reducing the frequency of maintenance interventions and thereby extending equipment lifespan while maintaining continuous sampling efficiency

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual mechanical cleaning process is replaced by a pneumatic purge system that uses a gaseous medium to remove solid particles, eliminating the need for physical disassembly and manual cleaning operations that stress the equipment

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If the sample pipe and purge pipe are integrated into a single system, then device complexity is reduced, but the purge gas may interfere with the sampling process and cleaning effectiveness is compromised

Engineering Contradiction:

Improvesystem structureVSAvoidcleaning effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system is segmented into separate functional components: a sample pipe system for gas extraction and a central purge system with dedicated purge pipes for cleaning, allowing each system to operate independently without interference while maintaining overall system effectiveness

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The central purge system acts as an intermediary cleaning mechanism that operates independently from the sampling pathway, using separate purge pipes to deliver cleaning gas to housing surfaces without interfering with the sample gas extraction process

Inventive Principle:

Principle #24Intermediary (Mediator)

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 apparatus effectively cleans solid particle build-up on the housing surfaces, ensuring continuous and efficient gas sampling even in harsh conditions, with optimized pipe dimensions for both sampling and cleaning, reducing maintenance needs and improving operational efficiency.

Implementation Method 1

a central purge system configured to remove aggregates of solid particles deposited on one or more housing surfaces by means of a gaseous medium, such as air

Methodology Applied

Scientific EffectPneumatic cleaning: Jet Erosion

Implementation Method 2

filter means comprising at least one filter for filtering a plurality of solid particles from the gaseous sample

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS12625040B2Gas sampling apparatus for extraction of gaseous samples

Publication Date: 2026.05.12 FLO2R APS

AI summary

A gas sampling apparatus including a housing having a housing wall and a housing opening. The gas sampling apparatus includes a sample system for extracting the gaseous sample, including a sample pipe having an opening enclosed by the housing wall and in fluid communication with the gaseous environment and filter means including a filter for filtering solid particles from the gaseous sample. The filter is enclosed by the housing wall and arranged at the opening. The gas sampling apparatus includes a central purge system to remove aggregates of solid particles deposited on one or more housing surfaces by a gaseous medium, wherein the central purge system includes a purge pipe including an outlet opening directed towards the housing opening and enclosed by the housing wall, wherein the sample system is arranged externally to the central purge system so that the sample pipe is separate from the purge pipe.