Hansen Solubility Parameter Method for Scale Removal
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Solution Overview
Problem
High concentrations of silica in geothermal water lead to significant scale precipitation in power generation plants, making it difficult to select optimal scale inhibitors due to varying metal compositions, and conventional methods using oxidizing or alkaline agents result in unexpected precipitates, poor cleaning, and harmful gas generation.
Innovation Solution
A method using Hansen solubility parameters to select a combination of penetrant, inducer, and remover chemical agents based on intrinsic physical property values, focusing on weakening adhesion forces at the scale interface, thereby optimizing scale removal without chemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional oxidizing agents or alkaline agents are used for scale removal, then scale can be removed through chemical reaction, but unexpected precipitates form, cleaning quality deteriorates, and harmful gases are generated
Solution Approach 1:
The invention changes the fundamental parameter of scale removal from chemical reaction-based to physical dissolution-based by using Hansen solubility parameters to select penetrants and removers that dissolve scale through solvation rather than chemical reaction, thereby eliminating harmful precipitates and gas generation while maintaining effective scale removal
Solution Approach 2:
The invention introduces Hansen solubility parameters as an intermediary selection criterion to match penetrants and removers with scale components based on their solubility characteristics, enabling optimal chemical agent selection that achieves scale removal without harmful side reactions
2Productivity
If scale removal is performed using chemical reactions with oxidizing or alkaline agents, then scale can be dissolved, but the method does not account for varying scale compositions across different power plants, making it difficult to select optimal agents
Solution Approach 1:
The invention transforms the scale removal approach from fixed chemical reaction methods to a flexible parameter-based selection system using Hansen solubility parameters, allowing adaptation to different scale compositions by selecting penetrants and removers whose HSP values match the specific scale characteristics of each power plant
Solution Approach 2:
The invention makes the scale removal process dynamic and adaptable by enabling selection of different penetrant and remover combinations based on the specific HSP characteristics of scale at different locations (surface scale, interface scale, bulk scale) and different power plant conditions
3Ease of manufacture
If chemical agents are selected without considering scale composition variations, then a standardized approach can be used, but cleaning quality deteriorates and unexpected precipitates form
Solution Approach 1:
The invention replaces standardized chemical agent selection with parameter-based selection using Hansen solubility parameters, where the HSP values of penetrants and removers are matched to the specific HSP characteristics of scale components, enabling both standardization through the HSP framework and precision through customized agent selection for each power plant's specific scale composition
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 allows for the selection of optimal chemical agents that reduce precipitate formation and improve cleaning efficiency, avoiding harmful gases and simplifying industrial waste disposal by targeting adhesion interfaces, thus extending machine cleaning periods and reducing risks.
Implementation Method 1
focusing on weakening the adhesion force at the scale adhesion interface
Implementation Method 2
selecting chemical agents for removing scale based on Hansen solubility parameters (HSP)
Data Source
AI summary
A method for selecting chemical agents for removing scale, the chemical agents being adapted for scale and its base material. A method for selecting chemical agents for removing scale, the method including steps of: obtaining coordinates A of an intrinsic physical property value based on a Hansen solubility parameter of an entire scale of interest; obtaining coordinates B of an intrinsic physical property value based on a Hansen solubility parameter of a surface on a base material side of the scale of interest; obtaining coordinates C of an intrinsic physical property value based on a Hansen solubility parameter of a base material of interest; selecting a penetrant having coordinates D of an intrinsic physical property value based on a Hansen solubility parameter based on an interaction radius Ra of the scale of interest with the coordinates A at the center; selecting a remover having coordinates E of an intrinsic physical property value based on a Hansen solubility parameter based on a positional relationship between the coordinates B and the coordinates C; and selecting an inducer having coordinates F of an intrinsic physical property value based on a Hansen solubility parameter based on a positional relationship between the coordinates D and the coordinates E.