Rotary Drum Soil Remediation Reactor with Internal Thermal Medium Circulation
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Solution Overview
Problem
Current indirect thermal desorption technologies for soil remediation face limitations in heat transfer efficiency and contaminant removal rates due to single heating modes and high energy consumption, particularly when dealing with large contaminated sites and compact soil blocks, which restricts their ability to meet remediation requirements efficiently and economically.
Innovation Solution
A medium internal circulation enhanced thermal desorption reactor design featuring a rotary drum with internal pipe bundles, a material blocking sieve plate, and a thermal medium circulation system that facilitates heat transfer and contaminant volatilization, allowing for improved heat distribution and contaminant removal without increasing apparatus size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If indirect thermal desorption is used for soil remediation, then safety is improved and secondary contamination is reduced, but heat transfer efficiency deteriorates and treatment capacity is limited
Solution Approach 1:
The reactor is divided into multiple heating zones (direct heating zone with internal pipe bundles and indirect heating zone with outer shell) that operate simultaneously, allowing different heating modes to work in parallel to overcome the limitation of single-mode indirect heating
Solution Approach 2:
A thermal medium (ceramic beads or metal shot) is introduced as an intermediary carrier that absorbs heat from both direct and indirect sources, then circulates through the soil to enhance heat transfer efficiency and treatment capacity
2Productivity
If apparatus size is increased to improve treatment capacity, then productivity is improved, but mounting and transportation difficulty increases
Solution Approach 1:
The reactor adopts a modular skid-mounted design with configurable heating zones that can be adjusted based on treatment requirements, allowing the apparatus to maintain high capacity while preserving mobility and ease of deployment
Solution Approach 2:
The internal pipe bundles are nested within the rotary drum structure, and the thermal medium circulation system is integrated within the same apparatus footprint, maximizing treatment capacity without increasing external dimensions
3Reliability
If single indirect heating mode is used, then safety is improved, but heat transfer efficiency deteriorates and remediation period extends
Solution Approach 1:
The patent merges direct heating (through internal pipe bundles) and indirect heating (through outer shell) into a unified system that operates simultaneously, combining the speed of direct heating with the safety of indirect heating to shorten remediation time
Solution Approach 2:
The thermal medium circulation system continuously circulates heated medium through the soil, maintaining sustained high-temperature treatment conditions that accelerate contaminant removal and reduce remediation period
4Loss of energy
If thermal medium circulation is added to enhance heat transfer, then heat transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The thermal medium circulation system serves multiple functions simultaneously: heat transfer enhancement, soil aeration, and contaminant removal assistance, justifying the added complexity through multi-functionality that addresses multiple problems at once
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 enhanced reactor achieves a significant increase in treatment efficiency and contaminant removal rates, with up to 99% organic contaminant removal and reduced energy consumption, enabling effective remediation of medium and large contaminated sites within the same apparatus size.
Implementation Method 1
A medium internal circulation enhanced thermal desorption reactor design featuring a rotary drum with internal pipe bundles, a material blocking sieve plate, and a thermal medium circulation system that facilitates heat transfer
Implementation Method 2
By controlling the system temperature and the material dwell time, the organic contaminants are gasified and volatilized selectively, so that the organic contaminants are separated and removed from soil particles
Data Source
AI summary
A medium internal circulation enhanced thermal desorption soil remediation reactor and a method thereof, and belongs to the technical field of soil remediation. Internal circulation of a thermal medium is realized through a specially designed rotary drum structure, and a way for heating soil by utilizing oxidative decomposition of organic contaminants is provided, so that the treatment efficiency of an apparatus and the contaminant removal effect are improved significantly on the premise of not increasing the scale of the apparatus, and at the same time, the energy consumption of a system is reduced.