Welcome: Yiwu Weihao Machinery Equipment Company
As a leading manufacturer of high-efficiency evaporation and distillation equipment, Yiwu Weihao Machinery Equipment Company specializes in designing and manufacturing Cardanol Cashew Shell Oil Distillation Scraper Thin Film Evaporators—professional equipment dedicated to the extraction and purification of cardanol from cashew nut shell liquid (CNSL). Tailored for the high viscosity, thermal sensitivity, and easy polymerization characteristics of CNSL, this equipment adopts advanced scraper thin film technology to realize continuous, low-temperature, high-vacuum distillation, efficiently separating high-purity cardanol while avoiding thermal degradation and polymerization, making it the core equipment for modern cardanol production lines.
Cashew shell oil is a rich renewable agro-industrial byproduct, and cardanol, its main active component, is widely used in friction materials, coatings, resins, and surfactants. Our scraper thin film evaporator solves the bottlenecks of traditional batch distillation—low yield, dark color, and easy degradation—providing a reliable, efficient, and stable solution for industrial cardanol production.
The Cardanol Cashew Shell Oil Distillation Scraper Thin Film Evaporator achieves efficient cardanol separation through a scientific, continuous workflow, perfectly adapting to the properties of CNSL:
Feed Pretreatment: Crude cashew shell oil is filtered and preheated to remove solid impurities and reduce viscosity, ensuring smooth feeding and protecting the evaporation system.
Thin Film Formation: The pretreated CNSL is fed into the evaporator, where a high-speed rotating scraper system uniformly distributes the material into an ultra-thin, turbulent liquid film on the inner wall of the heating cylinder, maximizing heat transfer area and efficiency.
Low-Temperature High-Vacuum Distillation: Under high vacuum (up to 0.1–5 mbar) and controlled low temperature (150–220°C), the cardanol component with relatively low boiling point is rapidly vaporized, while high-boiling impurities and polymers remain in the liquid phase. The short residence time (only a few seconds) effectively prevents cardanol from thermal degradation and polymerization.
Vapor Separation & Condensation: The cardanol vapor rises to the top of the evaporator, is separated from entrained liquid droplets, and then condensed into high-purity liquid cardanol, which is collected as the finished product.
Residue Discharge: The high-viscosity residue (tar, polymers, and heavy impurities) is continuously discharged from the bottom of the evaporator, realizing continuous and stable operation of the entire system.
CNSL-Specific Design: Optimized for high viscosity, easy scaling, and thermal sensitivity of cashew shell oil; the scraper system continuously updates the liquid film, preventing coking and scaling on the heating surface, ensuring long-term stable operation.
Short Residence Time: Material stays in the heating zone for only 2–10 seconds, minimizing thermal history and effectively avoiding cardanol polymerization and degradation, greatly improving product color and stability.
High Yield & Purity: Continuous distillation under high vacuum increases cardanol yield from traditional 60% to 67–70%, with product purity reaching 95–99%, meeting industrial and high-end application standards.
High Heat Transfer Efficiency: The turbulent thin film formed by the scraper reduces thermal resistance, with total heat transfer coefficient 3–5 times higher than traditional evaporators, significantly improving distillation efficiency.
Corrosion-Resistant Structure: All wetted parts made of 316L stainless steel or Hastelloy, resistant to the corrosion of acidic and phenolic components in CNSL, extending equipment service life.
Fully Automatic Control: PLC + touch screen control system, real-time monitoring of vacuum degree, temperature, feed rate, and discharge, realizing unmanned operation and precise process control.
Customizable Configuration: Available in single-stage or multi-stage (with short-path molecular distillation) configurations; customize evaporation area (1–100 ㎡), scraper speed, and vacuum level according to daily cardanol output (500 kg–50 tons) and purity requirements.
Our Cardanol Cashew Shell Oil Distillation Scraper Thin Film Evaporators are widely used in the renewable chemical and biomass material industries, providing core equipment for cardanol extraction and purification, including but not limited to:
Cardanol Production Plants: Large-scale continuous extraction of high-purity cardanol from crude cashew shell oil, as raw material for friction materials, epoxy curing agents, and phenolic resins.
CNSL Refining Enterprises: Purification of technical-grade CNSL to produce high-value cardanol, improving product added value and market competitiveness.
Biomass Material R&D: Small and pilot-scale production of high-purity cardanol for new material research and development, such as bio-based polymers and green surfactants.
Chemical Waste Recycling: Treatment of cardanol-containing waste liquid, realizing resource recovery and reducing environmental pollution.
We provide one-stop solutions for Cardanol Cashew Shell Oil Distillation Scraper Thin Film Evaporators, from professional CNSL property analysis, process design, and custom manufacturing to on-site installation, commissioning, operator training, and long-term after-sales support. Our technical team has rich experience in high-viscosity and thermal-sensitive material distillation projects, and can tailor the most suitable evaporation system according to your raw material properties, output, and purity requirements, helping you reduce production costs and improve product quality.
Whether you need a small pilot evaporator for R&D or a large-scale industrial production line, we can provide reliable equipment and professional services to meet your cardanol production needs.
Contact us today to get a free CNSL distillation test, technical proposal, energy consumption calculation, and quotation for your Cardanol Cashew Shell Oil Distillation Scraper Thin Film Evaporator project.
