Combustion Analyzer Condensation Elimination and Sensor Sealing
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Solution Overview
Problem
Conventional combustion analyzers face issues with hazardous condensate disposal and sensor element degradation due to exposure to oxygen and humidity changes, leading to rapid consumption or drying out of electrochemical sensors.
Innovation Solution
The combustion analyzer system incorporates a condensation elimination unit to separate condensable vapors from flue gas, directing dry gas to sensors and condensate back into the flue, and includes sealing mechanisms to protect electrochemical sensors from oxidation when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a water trap is used to collect condensed liquid from flue gas, then condensate can be collected for disposal, but the trap becomes susceptible to freeze-induced breakage and requires hazardous waste disposal procedures
Solution Approach 1:
The patent extracts the harmful condensate from the flue gas stream before it reaches the sensor and eliminates the need for a water trap by directing the separated condensate back into the flue for evaporation. This removes the problematic collection point that would otherwise require hazardous waste disposal and is vulnerable to freezing.
Solution Approach 2:
The patent converts the harmful condensate, which would otherwise require hazardous disposal, back into a beneficial substance by reintroducing it to the flue where it evaporates and returns to the gas stream, effectively eliminating waste disposal needs and freeze risks.
2Ease of operation
If electrochemical sensors are exposed to air with 21% oxygen when not in use, then sensors are readily available for immediate use, but reactive elements are rapidly consumed and electrolyte dries out or dilutes
Solution Approach 1:
The patent creates an inert or low-oxygen environment around the electrochemical sensors when not in use by maintaining the flue gas atmosphere (which has low free oxygen) rather than exposing sensors to ambient air with 21% oxygen. This dramatically slows the consumption of reactive elements and prevents electrolyte degradation while keeping sensors ready for use.
3Measurement precision
If flue gas with condensable vapors is directed to sensors, then complete flue gas analysis is achieved, but condensate accumulates creating hazardous waste and potential freeze damage
Solution Approach 1:
The patent segments the flue gas stream into two paths: one path allows complete flue gas analysis by exposing sensors to the full gas composition, while another path separates out the condensable vapors through condensation and redirects them back to the flue for evaporation, eliminating hazardous waste accumulation.
4Duration of action of moving object
If electrochemical sensors are protected from oxygen exposure when not in use, then sensor lifespan is extended, but sensors must be sealed or isolated requiring additional mechanisms
Solution Approach 1:
The patent merges the sensor protection function with the existing flue gas sampling system. By maintaining the low-oxygen flue gas atmosphere in the sampling line and sensor environment, the system simultaneously protects sensors from oxidation and maintains representative sampling conditions, eliminating the need for separate sealing mechanisms or inert gas supply systems.
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 solution prevents the accumulation of hazardous condensate and preserves sensor elements by maintaining a dry environment, reducing oxidation and humidity-related issues, thus extending sensor lifespan and ensuring safe disposal of condensate.
Implementation Method 1
The condensation elimination unit is operable to separate condensable vapors in the flue gas
Implementation Method 2
directed to a mister for dispersal
Data Source
AI summary
A combustion analyzer system includes an analyzer unit, a primary analysis probe and one or more remote probes. The analyzer unit includes a condensation removal unit and two or more electrochemical sensors to detect at least oxygen and carbon monoxide. The analyzer unit also includes a means for sealing or isolating the electrochemical sensor inputs to prevent oxidation of the reactive elements when the unit is not in use.