Heated Filter Unit for Salt Removal in Oxidizable Constituent Analysis
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Solution Overview
Problem
Existing apparatuses for determining oxidizable constituents in aqueous samples face issues with salt and metal oxide contamination, leading to clogging and aerosol formation, which complicates maintenance and reduces analysis accuracy.
Innovation Solution
A high temperature reactor system with a filter unit placed between the gas discharge and condensing unit, where the filter unit is thermally insulated and heated to maintain temperatures above 100°C, effectively removing salts and metal oxides before condensation occurs, preventing aerosol formation and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the gas mixture is cooled down for condensation, then water separation is achieved, but salts and metal oxides precipitate and cause clogging
Solution Approach 1:
The filter unit is placed before the condensing unit to remove salts and metal oxides from the gas mixture before condensation occurs. This preliminary filtration prevents the precipitation and clogging problems that would otherwise occur when the gas is cooled for water separation.
Solution Approach 2:
The system is divided into separate functional units: a filter unit for removing salts and metal oxides, and a condensing unit for water separation. This segmentation allows each unit to perform its specific function optimally without interfering with the other, preventing clogging in the condensing unit.
2Object-affected harmful factors
If filters are placed in cold regions for salt removal, then salt deposition is achieved, but filter maintenance becomes complex
Solution Approach 1:
The filter unit is positioned to receive hot gas directly from the high-temperature reactor, performing salt removal before the gas cools. This maintains salts in a more manageable state and simplifies filter maintenance compared to filtering cold precipitated salts.
Solution Approach 2:
The filter unit is heated to maintain temperatures above 100°C, changing the thermal parameter of the filtering process. This prevents condensation in the filter, keeps salts in a more removable state, and simplifies maintenance by preventing difficult-to-remove crystalline deposits.
3Object-affected harmful factors
If the filter unit is heated to prevent condensation, then aerosol formation is prevented, but energy consumption increases
Solution Approach 1:
The filter unit is heated before and during the filtering process to prevent condensation and aerosol formation. This preliminary heating action eliminates the need for additional heating downstream and prevents energy loss associated with removing condensed moisture later.
Solution Approach 2:
The heated filter unit acts as an intermediary between the high-temperature reactor and the condensing unit. It maintains the gas temperature above the dew point, preventing condensation and aerosol formation, while requiring less energy than cooling and re-heating the gas would require.
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 configuration ensures efficient removal of salts and metal oxides, preventing clogging and aerosol formation, while allowing for easy filter exchange and maintenance, thereby improving the accuracy and reliability of oxidizable constituent analysis.
Implementation Method 1
the gas discharge, the filter unit and optionally connecting elements arranged between gas discharge and filter unit are thermally insulated and/or equipped with heating elements in such a manner, that their temperature during operation of the apparatus is settable to more than 100° C.
Implementation Method 2
a condensing unit is placed in front of the analysis chamber for condensing water from the gas mixture
Implementation Method 3
a high temperature reactor for decomposing the liquid sample and forming a gaseous mixture, which contains at least the constituent as a gaseous oxide
Data Source
AI summary
An apparatus for determining the content of at least one oxidizable constituent of an aqueous, liquid sample, comprising a high temperature reactor for decomposing the liquid sample and forming a gaseous mixture, which contains at least the constituent as a gaseous oxide, wherein the high temperature reactor has a liquid inlet for delivery of the liquid sample and a gas inlet for delivery of a carrier gas, and is connected via a gas discharge with an analysis chamber, wherein a condensing unit is placed in front of the analysis chamber for condensing water from the gas mixture, wherein, during operation of the apparatus, a gas stream of the carrier gas with the gas mixture of the high temperature reactor passes via the gas discharge and the condensing unit into the analysis chamber, and wherein, between the gas discharge and the condensing unit, a heatable filter unit is interposed for removal of salts and/or metal oxides from the gas mixture, and the gas discharge, the filter unit and optionally connecting elements arranged between gas discharge and filter unit are thermally insulated and/or equipped with heating elements in such a manner that their temperature during operation of the apparatus is settable to more than 100° C.