What Type of Evaporator Should the New Energy Lithium Battery Industry Use?

In the new energy lithium battery industry, choosing the right evaporator depends primarily on specific process requirements and application scenarios. The following are recommended evaporator types and their applicable scenarios for this industry:

1.Falling Film Evaporator

Suitable for:Solvent recovery and concentration processes in the production of lithium battery cathode materials (such as lithium iron phosphate and ternary materials).

Scenarios requiring the handling of heat-sensitive materials, such as the recovery of NMP (N-methylpyrrolidone) solvent.

Reason: Falling film evaporators achieve evaporation by forming a thin film of liquid along the heating tube wall, featuring short residence time and low temperature difference, effectively preventing the decomposition or deterioration of heat-sensitive materials.

2.Forced Circulation Evaporator

Suitable for:Concentration processes containing solid particles or high-viscosity materials, such as the preparation of lithium battery precursor materials.

High-salt wastewater treatment or electrolyte wastewater concentration.

Reason: Forced circulation evaporators achieve high-speed circulation of materials through pumps, effectively preventing scaling and clogging problems, and are suitable for handling high-concentration or high-viscosity liquids.

3.Multi-Effect Evaporator

Suitable for: Large-scale industrial production requiring energy conservation and emission reduction, such as the treatment of lithium-containing wastewater generated during lithium battery production.

For enterprises with high energy consumption requirements.

Reason: Multi-effect evaporators utilize multiple evaporation and condensation processes to reuse the thermal energy of steam, significantly reducing unit energy consumption, making them particularly suitable for large-scale continuous production.

4.Mechanical Vapor Recompression (MVR) Evaporator

Suitable for: Lithium battery production processes with high environmental and energy-saving requirements, such as electrolyte wastewater treatment or solvent recovery.

For long-term operation requiring stable performance.

Reason: MVR evaporators use a compressor to compress and heat secondary steam for reuse, significantly reducing external steam consumption, resulting in low operating costs and superior environmental performance.

5.Scraped Thin-Film Evaporator

Suitable for: Concentration of high-viscosity or easily crystallizing materials, such as the purification of additives in lithium battery electrolytes.

Scenery requiring rapid evaporation and prevention of material retention.

Reason: Scraped thin-film evaporators continuously refresh the liquid film using mechanical scrapers, ensuring uniform heating and rapid evaporation of the material, making them particularly suitable for processing liquids with complex properties.

Comprehensive Recommendations: For solvent recovery (e.g., NMP), falling film evaporators or MVR evaporators are preferred.

For wastewater treatment (e.g., lithium-containing wastewater), multi-effect evaporators or MVR evaporators are recommended.

For precursor material preparation or electrolyte wastewater treatment, forced circulation evaporators or scraped thin-film evaporators can be considered.

Based on actual needs and budget, considering equipment investment costs, operating expenses, and ease of maintenance, select the most suitable evaporator type.