PV Panel Recycling Solution

With the widespread adoption of photovoltaic power generation technology and the continuous expansion of the industry's scale, early-deployed photovoltaic modules are gradually reaching the end of their service life. The recycling and processing of photovoltaic panels have become an issue that cannot be ignored. Efficient and environmentally friendly recycling equipment is a critical link in achieving a green closed-loop and resource recycling within the photovoltaic industry.

Photovoltaic panels primarily consist of glass, aluminum frames, silicon materials, plastic backsheets, and trace metals such as silver and copper. The core objective of recycling is to safely and effectively separate and recover these materials while maximizing resource value and preventing secondary environmental pollution from improper disposal. A comprehensive photovoltaic panel recycling production line typically involves the following key steps and corresponding equipment:

1. Pre-processing and Disassembly

The first high-quality step in recycling involves preliminary inspection and pre-treatment of waste PV modules. Manual or automated equipment first removes the junction box and cables from the modules. Subsequently, specialized equipment or tools separate the aluminum frame from the laminated core assembly. The aluminum frame, being a pure material, can be directly reused as recycled aluminum after simple processing, offering significant economic value. Equipment for this stage must be highly efficient and low-waste to ensure complete frame recovery.

2. Crushing and Sorting

The laminate assembly (comprising glass, EVA film, solar cells, and backsheet) after frame removal represents the core challenge of processing. This stage typically employs a combined multi-stage physical crushing and fine sorting process.

First, coarse crushing equipment reduces the laminate into smaller flake-like material. Subsequently, fine crushing further pulverizes the material to separate distinct layers (glass, silicon powder, plastic, metal).

The crushed material enters the core sorting stage. Utilizing a series of sorting equipment, materials are progressively separated based on physical properties (density, particle size, conductivity, magnetic properties, etc.):

- Air classification/ Air classification: Utilizes airflow to separate lightweight plastic backsheet fragments from heavier glass and metal particles.

- Vibrating screen classification: Grades materials by particle size, preparing them for subsequent separation.

- Electrostatic separation: Exploits differences in material conductivity. Under a high-voltage electric field, highly conductive metal particles (e.g., silver, copper) are efficiently separated from non-conductive silicon powder and glass particles.