PV Module Heating Chamber for Low-Temperature EVA Removal
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Solution Overview
Problem
Current high-temperature heating treatments for recycling photovoltaic modules consume excessive energy and can produce harmful gases, while low-temperature methods may not fully remove EVA, leading to residue issues.
Innovation Solution
A heating treatment device with a horizontal partition, heating rod, and gas pump system that uses controlled hot air to melt and remove EVA at a lower temperature (220-240°C) without decomposition, employing movable splitting sheets with gas vents and flexible magnetic meshes to support silicon wafers and prevent falling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature heating treatment is used to remove EVA, then the EVA removal rate increases to 99% or above, but energy consumption increases and harmful gases are produced
Solution Approach 1:
The patent changes the temperature parameter from high-temperature (above EVA decomposition point) to low-temperature (below EVA decomposition point) heating, combined with controlled oxygen environment to achieve effective EVA removal without decomposition. This parameter change resolves the contradiction by operating in a different regime where both low energy consumption and high removal rate are achieved.
Solution Approach 2:
The patent creates an oxygen-controlled atmosphere within the heating chamber, limiting oxygen availability to prevent EVA decomposition while still allowing EVA to be removed through controlled heating. This atmospheric control enables effective EVA removal at lower temperatures without producing harmful decomposition gases, thus resolving the contradiction between removal efficiency and environmental harm.
2Reliability
If high-temperature heating treatment is used to remove EVA, then the EVA removal rate increases to 99% or above, but harmful gases are produced
Solution Approach 1:
The patent creates an oxygen-controlled atmosphere within the heating chamber, limiting oxygen availability to prevent EVA decomposition while still allowing EVA to be removed through controlled heating. This atmospheric control enables effective EVA removal at lower temperatures without producing harmful decomposition gases, thus resolving the contradiction between removal efficiency and environmental harm.
Solution Approach 2:
The patent changes the temperature parameter from high-temperature (above EVA decomposition point) to low-temperature (below EVA decomposition point) heating, combined with controlled oxygen environment to achieve effective EVA removal without decomposition. This parameter change resolves the contradiction by operating in a different regime where both low energy consumption and high removal rate are achieved.
3Ease of manufacture
If low-temperature heating treatment is used to soften EVA, then the process is simple and practical, but EVA cannot be removed thoroughly leaving residues
Solution Approach 1:
The patent changes the temperature parameter from low-temperature (EVA softening point) to controlled low-temperature (below EVA decomposition point but sufficient for removal), combined with oxygen limitation to enable complete EVA removal without simplification of the process. This resolves the contradiction by showing that controlled parameters can achieve both simplicity and completeness.
Solution Approach 2:
The patent creates an oxygen-controlled atmosphere within the heating chamber, limiting oxygen availability to prevent EVA decomposition while still allowing EVA to be removed through controlled heating. This atmospheric control enables effective EVA removal at lower temperatures without producing harmful decomposition gases, thus resolving the contradiction between removal efficiency and environmental harm.
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 effectively removes EVA at lower temperatures, saving energy and avoiding harmful gas production, while ensuring complete separation and environmental sustainability by preventing EVA decomposition and supporting silicon wafers during the process.
Implementation Method 1
A heating treatment device with a horizontal partition, heating rod, and gas pump system that uses controlled hot air to melt and remove EVA at a lower temperature (220-240°C) without decomposition
Implementation Method 2
A heating treatment device with a horizontal partition, heating rod, and gas pump system that uses controlled hot air to melt and remove EVA
Implementation Method 3
employing movable splitting sheets with gas vents and flexible magnetic meshes to support silicon wafers and prevent falling
Data Source
AI summary
A heating treatment device for photovoltaic module recycling includes a box, a heating rod and a gas pump. A horizontal partition is fixedly arranged inside the box, and the heating rod is located below the partition. The partition is provided with evenly distributed second through slots. An upper end of the partition is provided with evenly distributed shelf boards. The shelf boards are arranged vertically. One side of the shelf board is provided with a groove. The shelf board is further provided with a suction cup. An end surface at an opening of the suction cup is flush with an inner wall of the groove. The movable splitting sheets are arranged in the device. A lower end of the splitting sheet is provided with gas vents, and hot air is discharged through the gas vents. The temperature of the hot air is controlled at 220-240° C.