Depolymerization Liquid Generation Device Thermal Management
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Solution Overview
Problem
The existing depolymerization liquid generation devices face issues with thermal energy inefficiency and stable operation due to excessive cooling of depolymerization liquids and the risk of flow path closure caused by non-depolymerization liquids with insufficient decomposition, leading to increased viscosity and potential solidification.
Innovation Solution
A depolymerization liquid generation device is designed with a kneader, back pressure valve, heat exchange units, and a temperature controller to manage the temperature of the depolymerization liquid and supply water, using a switching valve to adjust heat medium flow paths, ensuring efficient heat exchange and maintaining temperatures above the melting point of non-depolymerization liquids during start-up to prevent solidification and reduce thermal energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the depolymerization liquid is excessively cooled, then the thermal energy at the time of concentration operation is increased, but the stable operation of the device is hindered due to flow path closure and increased viscosity
Solution Approach 1:
The system dynamically switches between different heat exchange paths based on operational requirements. The switching valve allows the heat medium to circulate through different paths (first path: through the first heat exchange unit only; second path: through both heat exchange units), enabling adaptive temperature control to prevent both excessive cooling and flow path closure
Solution Approach 2:
A heat medium acts as an intermediary between the temperature controller and the heat exchange units. The heat medium circulates through the first and second heat exchange units to transfer thermal energy, enabling precise temperature control of the depolymerization liquid without direct contact with the liquid itself
2Use of energy by stationary object
If the temperature of non-depolymerization liquid is not maintained above melting point, then energy consumption is reduced, but the liquid may solidify and close the flow path
Solution Approach 1:
During the start-up phase, the system preliminarily heats the flow path and maintains the temperature of non-depolymerization liquid above its melting point before full operation begins. This preliminary heating action prevents solidification and flow path closure before they can occur
Solution Approach 2:
The switching valve dynamically adjusts the heat medium circulation path based on operational phase. During start-up, the system uses the first heat exchange unit to maintain temperatures above the melting point of non-depolymerization liquid, preventing solidification while managing energy consumption
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 configuration reduces thermal energy usage, prevents flow path closure, and ensures stable operation by effectively heating and cooling the depolymerization liquid, thereby enhancing the efficiency and sustainability of the plastic recycling process.
Implementation Method 1
a first heat exchange unit provided in a flow path between the depolymerization liquid generation unit and the back pressure valve
Implementation Method 2
a second heat exchange unit provided in a supply path of the water supplied to the depolymerization liquid generation unit
Implementation Method 3
a temperature controller configured to adjust temperature of heat medium circulating through the first heat exchange unit and the second heat exchange unit
Data Source
AI summary
Depolymerization liquid generation device includes: depolymerization liquid generation unit configured to knead plastic and water under heating environment to generate depolymerization liquid; back pressure valve configured to adjust pressure of depolymerization liquid from depolymerization liquid generation unit; first heat exchange unit provided in flow path between depolymerization liquid generation unit and back pressure valve; second heat exchange unit provided in supply path of water supplied to depolymerization liquid generation unit; temperature controller configured to adjust temperature of heat medium circulating through first heat exchange unit and second heat exchange unit; and switching valve configured to switch between first flow path for circulating heat medium from temperature controller to temperature controller through first heat exchange unit and second flow path for circulating heat medium from temperature controller to temperature controller through first heat exchange unit and second heat exchange unit.