Application of Membrane Filter Press in Silicon Mud Waste Treatment

With the rapid development of the new energy industry, companies with monocrystalline silicon rods, silicon wafers, and solar cells as the core are promoting the popularization of green energy, but they are also facing huge challenges in the treatment of silicon mud waste. The membrane filter press has a remarkable effect in treating silica mud waste. The application of the membrane filter press in silica mud waste treatment will be introduced below.

What is Silicon Mud Waste?

During the production process, silicon wafer cutting produces a large amount of waste mortar, which will produce a large amount of silicon mud waste during the recycling process. A large amount of silicon carbide and polyethylene glycol contained in the silicon mud waste still has recycling value; in addition, if the silicon mud waste is not centrally processed, it will cause serious pollution to the environment.

The industry usually extracts part of the polyethylene glycol by washing it with water and then disposes it in a simple and crude way such as by burying or discarding it. This not only causes a great waste of resources but also causes serious pollution to the environment. Therefore, a membrane filter press is needed to treat silicon mud waste.

Silica Mud Waste Treatment Process

Waste mortar pretreatment
Waste mortar is washed and centrifuged to extract polyethylene glycol and recover metal particles initially.

Dehydration with a diaphragm filter press
The remaining silicon mud waste is fed into the filter chamber through a feed pump, and the solid particles are trapped in the filter cloth by pressure. A filter cake is initially formed and the liquid is filtered and separated. The diaphragm is then expanded by air or hydraulic means for secondary pressing, exerting additional pressure on the filter cake. This further reduces the moisture content of the filter cake and improves the dehydration efficiency. After dehydration is completed, the filter plate is opened and the filter cake is discharged. The filter cloth is automatically or manually cleaned to ensure continuous and efficient operation of the equipment.

Resource recovery and utilization
The dehydrated silicon mud can enter the subsequent purification equipment to recover silicon carbide for abrasive or other industrial purposes. The filtrate may still contain a small amount of polyethylene glycol, which can be extracted by distillation. For solid waste that cannot be recycled, standardized treatment (such as incineration or environmentally friendly landfill) is carried out.

Technical Advantages of Membrane Filter Press

Efficient dehydration
The membrane filter press uses the secondary extrusion function of the membrane to significantly reduce the moisture content of silica mud, providing conditions for subsequent resource recovery. Dehydrated filter cake is easy to transport and store.

Resource recovery
Through the solid-liquid separation function of the diaphragm filter press, silicon carbide and residual polyethylene glycol are extracted.
Increase the solid recovery rate and reduce resource waste.

Environmentally friendly treatment
Achieve harmless treatment, prevent pollutants from being directly discharged into the environment, and comply with strict environmental regulations.

Automation and energy-saving
The membrane filter press has the characteristics of a high degree of automation and simple operation, which can greatly reduce the processing cost of enterprises.

Conclusion

The application of membrane filter press in silica mud waste treatment can not only significantly increase the resource recovery rate, but also help companies meet increasingly stringent environmental protection requirements. This equipment plays an important role in the new energy industry, and its promotion and application will provide reliable support for the industry to achieve a win-win situation of economic and environmental benefits.

Application of Membrane Filter Press in Silicon Mud Waste Treatment