Key points for technical selection of solvent recovery machines in the electronic product manufacturing industry
I. Key Points for Technology Selection
In light of the specific requirements of the electronics industry, special attention should be paid to the following during the selection process:
Recovery technology: Mainly uses distillation techniques (such as thin-film evaporation and short-path distillation), which have high purity and can effectively separate substances with different boiling points. For azeotropic mixtures or heat-sensitive solvents, vacuum distillation or molecular sieve adsorption and other combined technologies may be required.
Materials and Construction:
Material: The parts in contact with solvents must be made of high-grade stainless steel (such as 316L) or coated with Teflon to prevent metal ion contamination and ensure the "electronic grade" purity of the recovered solvents.
Sealing and explosion-proofing: Most electronic solvents are flammable and explosive. The equipment must comply with ATEX or the corresponding national explosion-proof standards and be equipped with an inert gas protection system (such as nitrogen coverage).
Automation and Intelligence:
It should be equipped with functions such as fully automatic operation, one-button operation, precise control of distillation temperature and pressure, and automatic slag discharge.
It can be integrated with online purity monitoring (such as a densitometer) and IoT functions to enable remote data monitoring and early warning.
Scale matching: Select a model with appropriate processing capacity (such as 10L/h, 50L/h, 200L/h) based on the average daily or monthly waste solvent generation volume, taking into account both economy and processing efficiency.
II. Challenges and Precautions Faced
Mixed solvent treatment: If the production line uses multiple immiscible or solvents with similar boiling points, the recovery and separation are difficult. It is necessary to collect them separately at the front end or use more complex separation equipment.
High-boiling-point impurities, such as the accumulation of resins and polymers, require an effective slag removal system and regular maintenance.
Initial investment: High-quality, explosion-proof, and highly automated recycling machines have a relatively high initial investment, and a detailed return on investment analysis is required.
Process adaptation: Close cooperation with equipment suppliers is required to optimize process parameters for specific solvent formulations to achieve the best recovery rate and purity.
