New Energy

The centrifuges produced by the company are applied in the field of new energy

The Critical Role of Centrifuges in the New Energy Sector

Centrifugal separation technology is increasingly vital in the new energy industry, where it enables the efficient production, purification, and recycling of materials essential for sustainable energy solutions. Its applications span lithium-ion battery manufacturing, biofuel production, lithium extraction, and the hydrogen economy, contributing to improved efficiency, purity, and cost-effectiveness.

1. Lithium-Ion Battery Recycling and Production

The circular economy for lithium-ion batteries (LIBs) relies heavily on mechanical-hydrometallurgical processes, where centrifuges play a pivotal role.

• Application Scenario: Black Mass Processing
  • Process Description: After shredding and sieving spent batteries, the resulting material is a slurry known as "black mass," containing valuable metals (lithium, cobalt, nickel, manganese, graphite) and impurities. Hydrometallurgical recycling involves leaching this black mass with acids to dissolve the metals, followed by multiple separation steps.
  • Centrifuge Type Used: Decanter Centrifuge and Disc Stack Separator.
  • Detailed Technical Rationale:
    1. Solid-Liquid Separation after Leaching: The leached slurry contains undissolved solids (e.g., graphite, plastics, impurities) and a pregnant leach solution (PLS) containing the dissolved metal ions. A Decanter Centrifuge is ideally suited for this first separation step due to its ability to handle high solid loads and abrasive materials. It efficiently separates the solid residue from the PLS for further processing.
    2. Clarification and Purification: The PLS must be crystal-clear before the selective precipitation or solvent extraction of individual metals. A Hermetic Disc Stack Separator is used to remove fine, colloidal particles that the decanter cannot capture. This high-degree clarification is critical to prevent fouling and ensure the efficiency of downstream purification steps.
    3. Metal Salt Crystal Recovery: In the final stages, lithium carbonate (Li₂CO₃) or other metal hydroxides are precipitated as crystals. A Peeler Centrifuge is employed to separate these high-value crystals from the mother liquor, wash them thoroughly to remove impurities, and achieve a low-moisture cake ready for drying. This ensures the final product meets the strict purity standards for new battery cathode production.

2. Biofuels Production (Biodiesel and Bioethanol)

Centrifuges are fundamental to the economic viability of large-scale biofuel plants.

• Application Scenario: Transesterification and Fermentation Broth Processing
  • Process Description:
    • Biodiesel: The transesterification reaction of vegetable oils or animal fats produces biodiesel and glycerol. The primary separation of these two immiscible liquids is crucial.
    • Bioethanol: After fermentation, the "beer" contains ethanol, water, and solid yeast biomass.
  • Centrifuge Type Used: Disc Stack Separator (Self-Cleaning or Nozzle Type).
  • Detailed Technical Rationale:
    • Biodiesel-Glycerol Separation: A Disc Stack Separator performs continuous, high-throughput separation of biodiesel (light phase) from glycerol (heavy phase). It also simultaneously removes catalyst particles (e.g., potassium hydroxide) and soaps. This replaces slow, inefficient gravity separators, dramatically increasing plant capacity and yield.
    • Yeast Concentration in Bioethanol: After fermentation, centrifuges are used to concentrate the yeast biomass. This serves two purposes: 1) Recycling viable yeast back to the fermenter to increase fermentation efficiency, and 2) Dewatering spent yeast for use as animal feed (DDGS - Distillers Dried Grains with Solubles). The Nozzle-type Disc Stack Separator is perfect for this continuous biomass concentration.

3. Lithium Extraction from Brine (Direct Lithium Extraction - DLE)

DLE is an emerging, water-efficient alternative to traditional evaporation ponds.

• Application Scenario: Separation of Lithium-Loaded Adsorbent or Ion-Exchange Beads
  • Process Description: DLE processes pump lithium-rich brine through columns or contactors containing adsorbent materials or ion-exchange beads that selectively capture lithium ions. After loading, the beads are rinsed with a fresh solution (eluent) to release the concentrated lithium.
  • Centrifuge Type Used: Solid Bowl (Decanter) Centrifuge and Screen Scroll Centrifuge.
  • Detailed Technical Rationale: In certain DLE designs, the adsorbent beads are mixed with the brine in a slurry reactor. A Decanter Centrifuge or a specialized Screen Scroll Centrifuge is then used to continuously separate the small, dense beads from the brine. The centrifuge must provide gentle yet efficient separation to prevent bead attrition (breakdown), which is critical for the longevity and economics of the process. The clarified, lithium-depleted brine is discharged, while the lithium-loaded beads are conveyed for elution.

4. Hydrogen Economy (Fuel Cells)

• Application Scenario: Catalyst Recovery in Electrolyzer and Fuel Cell Manufacturing
  • Process Description: The production of catalysts for electrolyzers (to produce green hydrogen) and fuel cells often involves chemical processes where precious metals (e.g., platinum, iridium) are deposited on carbon supports. During manufacturing and recycling of catalyst slurries, efficient solid-liquid separation is needed.
  • Centrifuge Type Used: Tubular Bowl Centrifuge and Disc Stack Separator.
  • Detailed Technical Rationale: The catalyst particles are extremely fine and valuable. Tubular Bowl Centrifuges, capable of achieving very high G-forces (>15,000 Gs), are used in batch or semi-batch mode to separate these sub-micron particles from the liquid phase. This ensures maximum recovery of the expensive catalytic material and allows for efficient washing and solvent exchange.

Summary of Advantages over Conventional Methods

Conclusion

In the new energy sector, centrifuges are more than just separation devices; they are enablers of technological advancement and sustainability. They provide the precision, efficiency, and scalability required to process complex and often hazardous materials critical to batteries, biofuels, and hydrogen technologies. By ensuring high product purity, maximizing the recovery of valuable materials, and intensifying processes, centrifugal technology directly contributes to reducing the environmental impact and improving the economic feasibility of the global energy transition.