Tomographic Scale Build-up Detection Using Irregular Electrode Arrays
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Solution Overview
Problem
Existing tomographic techniques for determining scale build-up in pipes, tanks, and vessels are hindered by scale deposits on electrodes, leading to erroneous conductivity measurements, which traditional compensation methods struggle to accurately account for.
Innovation Solution
Employing an irregular configuration of electrodes with uneven spacings and varying widths/lengths to assess scale build-up, allowing for more accurate determination of electrode-fluid interface conductivity and subsequent scale layer calculation, enabling closed-loop control through chemical injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If regular configuration of electrodes is used for tomographic measurement, then the system structure is simple and easy to manufacture, but scale build-up on electrodes causes erroneous measurements and reduces measurement precision
Solution Approach 1:
The patent applies asymmetry by using an irregular configuration of electrodes around the pipe circumference, where electrodes are positioned at non-uniform angular intervals. This asymmetric arrangement creates unique measurement paths that are less susceptible to scale build-up effects, allowing the system to distinguish between scale-related conductivity changes and actual fluid composition variations, thereby improving measurement precision without requiring complex additional hardware
2Reliability
If scale build-up occurs on electrodes, then the electrode-fluid interface conductivity decreases, but this leads to erroneous tomographic images and reduces reliability of the measurement system
Solution Approach 1:
The patent converts the harmful effect of scale build-up into a beneficial diagnostic tool. By using irregular electrode configurations and analyzing the specific patterns of conductivity changes across different electrode pairs, the system can distinguish between conductivity changes caused by scale (which follow predictable geometric patterns) and those caused by actual fluid composition changes. This allows the system to compensate for scale effects and maintain reliable tomographic imaging even in the presence of scale build-up
3Measurement precision
If traditional compensation methods are used for scale build-up, then some correction can be applied, but the measurement precision remains insufficient due to the complexity of scale effects
Solution Approach 1:
The patent applies segmentation by dividing the measurement system into multiple independent electrode pairs with irregular spacing. Each electrode pair provides an independent measurement path through the pipe, and by analyzing the collective data from multiple segmented measurement paths, the system can reconstruct scale build-up patterns with higher precision. This segmentation approach allows complex scale effects to be broken down into manageable components that can be individually assessed and compensated
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 approach provides a more precise assessment of scale build-up, improving the accuracy of fluid conductivity measurements and enabling effective control measures, thereby enhancing the reliability of tomographic imaging in industrial processes.
Implementation Method 1
the impedance between two adjacent electrodes varies with the conductivity of the fluid in the measurement volume
Implementation Method 2
Tomographic determination of scale build-up in pipes and other tanks, cells, vessels or containers using tomographic techniques
Data Source
AI summary
Apparatus is provided featuring a signal processor or processing module configured at least to: receive signaling containing information about the conductivity of a fluid contained, processed or flowing in a pipe, tank, cell or vessel having electrodes around the circumference of the pipe, tank, cell or vessel in an irregular configuration; and determine a scale build-up in the pipe, tank, cell or vessel using a tomographic processing technique, based at least partly on the signaling received. The signal processor module may be configured to provide corresponding signaling containing information about the scale build-up in the pipe, tank, cell or vessel using the tomographic processing technique, e.g., including where the corresponding signaling contains information about a chemical to be injected to control the scale build-up, including in a closed loop manner.