Closed-Loop Mercury Flow Analysis With Cooling and Gas Separation
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Solution Overview
Problem
Conventional mercury analysis methods require complex sample pretreatment procedures, which can be time-consuming and prone to errors.
Innovation Solution
A flow analyzer and analysis method that involve continuous operations from sample pretreatment to analysis in a closed system, including a heating section for heat treatment, a cooling section for gas removal, and a gas-liquid separation section to prevent mercury volatilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional mercury analysis methods are used, then accurate mercury analysis can be achieved, but complex sample pretreatment procedures are required
Solution Approach 1:
The patent combines multiple separate operations (sample introduction, reagent mixing, heating, cooling, gas-liquid separation, and analysis) into a single integrated flow analysis system. The sample flows continuously through a tube system where reagents are added and reactions occur in-line, eliminating the need for separate pretreatment steps while maintaining analysis accuracy.
Solution Approach 2:
The flow analysis system enables continuous operation where samples are continuously introduced, reacted, and analyzed without interruption. The continuous flow through heated and cooled sections allows for sustained reaction conditions and efficient mercury analysis without the batch-wise pretreatment required by conventional methods.
2Device complexity
If flow analysis method is implemented without cooling section, then device complexity is reduced, but mercury volatilization occurs leading to analysis errors
Solution Approach 1:
The cooling section utilizes phase transition principles by cooling the sample to condense mercury vapor back into liquid form after the heating reaction. This prevents mercury loss through volatilization and ensures accurate analysis, while the condensed mercury can then be properly separated in the gas-liquid separation section.
3Productivity
If heating temperature is increased to improve reaction efficiency, then reaction speed increases, but mercury volatilization is enhanced
Solution Approach 1:
The cooling section is positioned immediately after the heating section to promptly cool the sample and condense mercury vapor before it can volatilize and escape. This preliminary cooling action prevents mercury loss while allowing the heating section to operate at high temperatures for efficient reaction.
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 accurate analysis of mercury without complex sample pretreatment, maintaining accuracy equivalent to conventional methods while preventing mercury volatilization.
Implementation Method 1
a heating section that carries out a heat treatment with respect to the sample to which the reagent has been added
Implementation Method 2
a cooling section that cools the sample which has been subjected to the heat treatment and which is transferred inside the tube
Implementation Method 3
a gas-liquid separation section that removes gas which is present in the tube after cooling
Data Source
AI summary
An object is to provide a flow analyzer which makes it possible to, without carrying out a complicated pretreatment, analyze mercury and analyze a sample containing mercury with accuracy equivalent to that of a conventional method. The object is attained by a flow analyzer including a sample introduction section (1), a reagent introduction section (3), and an analysis section (4), the flow analyzer further including: a heating section (5) that carries out a heat treatment with respect to a sample to which a reagent has been added; a cooling section (6) that cools the sample which has been subjected to the heat treatment and which is transferred inside a tube; and a gas-liquid separation section (7) that removes gas which is present in the tube after cooling.