Soil Remediation System Uniform Heating and Chemical Oxidation
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Solution Overview
Problem
Existing soil remediation technologies face challenges such as energy waste due to large temperature differences in the soil, poor treatment effects in low-temperature areas, and contamination rebound after remediation.
Innovation Solution
A soil remediation system and method that includes a heating unit and a pumping/injecting device to uniformly heat the soil and inject remediation agents, ensuring consistent treatment across the soil area and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If in-situ thermal desorption technology is used to heat contaminated soil to high temperature (>100°C) to volatilize contaminants, then remediation efficiency is improved and a wide range of contaminants are treated, but energy consumption increases extremely high and remediation costs become high
Solution Approach 1:
The patent changes the temperature parameter from high temperature (>100°C) to low temperature (40-60°C) thermal strengthening, combined with chemical oxidation agents, to achieve effective remediation without extreme heating
Solution Approach 2:
The patent combines thermal strengthening with chemical oxidation (composite remediation approach), using both heat and chemical agents working together to degrade contaminants, reducing reliance on high energy input
2Loss of time
If chemical oxidation technology is used to remove contaminants through oxidation characteristics of chemical oxidants, then remediation cycle is short and cost is low, but reaction is often slow and influencing radius is small due to soil heterogeneity, leading to contamination rebound and smearing effect
Solution Approach 1:
The patent raises the temperature parameter to optimal levels (40-60°C) to accelerate chemical oxidation reactions, solving the slow reaction rate problem while maintaining cost-effectiveness
Solution Approach 2:
The patent uses dynamic water injection and pressure control to enhance the distribution and penetration of oxidation agents throughout the soil matrix, expanding the influencing radius and ensuring comprehensive treatment
3Temperature
If simple continuous operation of chemical oxidation and soil heating is performed with heating device, then heating can be performed, but heating range is small and soil cannot be uniformly heated, causing energy waste and large temperature difference in soil, resulting in poor treatment effect in low-temperature areas
Solution Approach 1:
The patent segments the heating process into multiple zones using arrays of heating elements distributed throughout the treatment area, enabling simultaneous heating of multiple regions and improving uniformity
Solution Approach 2:
The patent implements continuous heating and water injection operations that maintain consistent temperature distribution throughout the soil, preventing energy waste from intermittent heating cycles
4Temperature
If heating is performed with large difference in soil temperature, then heating can be achieved, but energy waste is caused and lower-temperature part cannot achieve thermal strengthening assisted in-situ chemical oxidation remediation, resulting in significant differences in treatment effect of contaminants in different portions of soil
Solution Approach 1:
The patent creates equipotential temperature distribution throughout the soil by using distributed heating elements and thermal conduction enhancement techniques, ensuring uniform treatment conditions across all treatment zones
Solution Approach 2:
The patent employs temperature monitoring and feedback control systems to adjust heating intensity and water injection rates, maintaining optimal temperature distribution and preventing large temperature differences that would cause non-uniform treatment
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
The system achieves uniform heating and effective remediation of contaminants, reducing energy consumption by 30% compared to traditional methods, and preventing contamination rebound by ensuring thorough treatment.
Implementation Method 1
heating the soil to be remediated to a target temperature
Implementation Method 2
pumping underground water in the soil
Implementation Method 3
injecting a remediation agent into the soil
Implementation Method 4
thermal strengthening assisted in-situ chemical oxidation remediation
Data Source
AI summary
A soil remediation system and a soil remediation method. The soil remediation system comprises a heating unit (5) and a pumping/injecting device for pumping underground water in soil and injecting a remediation agent into the soil. The soil remediation method comprises the following treatments: heating soil to be remediated; pumping underground water; and injecting a remediation agent.