industrial evaporators

In the modern era of “Zero Liquid Discharge“ (ZLD) and high-purity chemical processing, the demand for efficient thermal separation has never been higher. As a premier Agitated Thin Film Dryer (ATFD) Manufacturer, RAJ Process delivers cutting-edge evaporation solutions engineered to handle the most complex, heat-sensitive, and high-viscosity fluids. Our systems are designed to maximize heat transfer, minimize residence time, and ensure that even the most difficult-to-handle slurries are converted into high-quality solids or concentrated liquids. 1. Understanding ATFD Technology: The Science of Thin Films An Agitated Thin Film Dryer (ATFD) is a vertical or horizontal thermal separation unit. Unlike traditional evaporators where the liquid sits in a vessel or flows through tubes, the ATFD uses mechanical agitation to create a highly turbulent, thin film of product against a heated jacketed wall. How the Process Works Feed Entry: The liquid or slurry enters the top of the cylindrical heating jacket. Thin Film Formation: A high-speed rotor with specialized blades spreads the liquid into a thin film (typically 0.5 to 2 mm thick) across the internal heated surface. Rapid Evaporation: Because the film is so thin, the heat transfer is near-instantaneous. Vapors travel upward through a mist eliminator. Solid Recovery: As the moisture evaporates, the material transitions from a liquid to a paste, and finally into a dry powder or flakes, which are discharged at the bottom. 2. Technical Specifications & Performance Chart Our ATFD units are custom-built to match the thermal sensitivity of your specific product. Below is the standard technical roadmap for our high-performance systems. 3. Specialized Rotor Blade Configurations The “heart“ of an ATFD is its rotor. Depending on whether your material is sticky, abrasive, or heat-sensitive, we offer four distinct blade configurations to optimize your yield: A. Fixed Blade Rotor Best For: Low to medium viscosity liquids. Mechanism: Maintains a precise, fixed clearance between the blade tip and the heated wall. It is ideal for continuous, high-speed evaporation of stable solutions. B. Cylindrical Wiper Rotor Best For: Highly viscous fluids and concentration tasks. Mechanism: Uses wipers to physically “wipe“ the film across the surface, preventing any stagnant “hot spots“ that could degrade the product. C. Spring-Loaded Rotor Best For: Products that tend to scale or form a hard crust on the walls. Mechanism: The blades are pushed against the wall by spring tension, ensuring the heating surface stays clean and heat transfer remains at 100% efficiency throughout the run. D. Centrifugal Blade Rotor Best For: Slurries with high solids content. Mechanism: Utilizes centrifugal force to press the blades outward. As the product thickens, the blades adapt to the changing resistance, making it the most versatile option for multi-product plants. 4. Key Advantages of Using ATFD Systems Zero Liquid Discharge (ZLD) Compliance In today’s regulatory environment, industrial plants are under pressure to eliminate wastewater. Our ATFDs act as the final stage of a ZLD plant, taking the “reject“ from Reverse Osmosis (RO) or Multi-Effect Evaporators (MEE) and turning it into dry, disposable salt or reusable solids. Minimal Residence Time Traditional evaporators can subject a product to heat for hours. In an ATFD, the residence time is measured in seconds. This is critical for pharmaceuticals, flavors, and enzymes that would otherwise lose their potency or change color if exposed to heat for too long. Single-Pass Operation Our technology allows for a “liquid-in, powder-out“ transition in a single pass. This eliminates the need for separate thickeners, centrifuges, or secondary dryers, significantly reducing your plant's footprint and capital expenditure. 5. Industrial Applications Across Sectors Pharmaceutical & Biotech Concentrating APIs: Gentle handling of active pharmaceutical ingredients. Solvent Recovery: Efficiently separating high-value solvents from waste streams. Herbal Extracts: Maintaining the bio-activity of natural extracts during concentration. Chemical & Petrochemical Dye & Pigment Concentration: Achieving high-purity colorants. Agrochemicals: Drying pesticides and fertilizers into stable powder forms. Resin Processing: Handling high-viscosity polymers without clogging. Food & Beverage Dairy Products: Concentrating whey and milk derivatives. Fruit Pulps: Reducing volume for transport while preserving nutritional integrity. Sweeteners: Processing sugar alcohols and corn syrup. 6. Engineering Excellence: Why RAJ Process? Choosing the right ATFD manufacturer is about more than just buying a machine; it’s about process reliability. We provide: Custom Simulation: We use thermal modeling to calculate the exact surface area required for your specific mass balance.

Evaporator / ATFD Solutions Raj Process is a market leader in manufacturing industrial evaporators, continuously innovating to deliver efficient and costeffective solutions. We are also one of the leading ATFD (Agitated Thin Film Dryer) manufacturers in India, offering advanced drying and evaporation systems for a wide range of applications. With decades of expertise, Raj Process designs and manufactures highquality, reliable, and customizable evaporator systems to meet the specific needs of our clients. Our commitment to innovation, reliability, and quality ensures exceptional results that consistently exceed customer expectations.

Raj Process is a leading manufacturer of forced circulation evaporators in India, offering advanced industrial systems designed to handle complex mixtures that conventional evaporators cannot efficiently process. Based in Pune, Raj Process is renowned for delivering highquality, reliable, and costeffective evaporation solutions tailored to diverse industrial needs. Forced Circulation Evaporator Manufacturers in India Forced circulation evaporators are engineered for the efficient concentration of viscous solutions and liquids prone to fouling. Unlike natural circulation systems, these evaporators use a pumping mechanism to continuously circulate the mixture, ensuring faster heat transfer, improved vaporliquid separation, and enhanced crystallization. This design makes them ideal for applications where scaling or crystallization tendencies are common. Raj Process systems are robust, efficient, and versatile, offering superior performance across industries. Our innovative engineering and customerfocused approach have firmly established us as one of the most trusted forced circulation evaporator manufacturers in India. Applications Liquids prone to fouling Highly viscous liquids Saline solutions (crystallization) Chemicals Food processing Effluent treatment Dyes Features of Raj Process Forced Circulation Evaporators High rate of heat transfer Positive circulation for consistent performance Reduced salting, scaling, and fouling issues Easy cleaning and maintenance Wide range of industrial applications

Leading Falling Film Evaporator Manufacturers in India: Raj Process As a premier falling film evaporator manufacturer in India, Raj Process provides state-of-the-art thermal separation technology. Falling film evaporators are specialized industrial devices designed for the efficient concentration of liquids, particularly those containing heat-sensitive components. How Does a Falling Film Evaporator Work? The system operates on a high-efficiency gravity principle. A thin film of liquid descends through the tubes, partially vaporizing as it absorbs heat from the external medium. This process ensures: Rapid Concentration: Achieves desired density in a single pass. Gentle Processing: Minimal thermal stress on the product. Energy Efficiency: Optimized for low temperature differences between the heating media and the boiling liquid. Why Choose Raj Process Equipment? What sets us apart as a leading falling film evaporator manufacturer in India is our commitment to product integrity. Our systems feature extremely short contact times—often just a few seconds—preventing the degradation of sensitive materials. Specialized Blade Configurations To handle varying liquid viscosities and fouling tendencies, we offer multiple rotor designs: Fixed Blade Rotor: Best for standard heat-transfer requirements. Cylindrical Wiper Rotor: Ideal for creating a highly turbulent film. Spring-Loaded Rotor: Maintains constant contact for high-fouling materials. Centrifugal Blade Rotor: Uses centrifugal force to ensure uniform film distribution. Advanced Egg Powder Solutions Beyond evaporation, Raj Process is a specialist in spray drying technology for egg products. While our plants can dry whole egg, yolk, and albumen in a single unit, we recommend dedicated lines for large-scale operations to ensure the highest hygiene standards and prevent cross-contamination. Industry Applications & Performance Our evaporators are versatile workhorses across multiple sectors. Below is a breakdown of common applications and why the falling film method is preferred. Application Chart: Industry Use Cases

In industries such as chemicals, food processing, pharmaceuticals, and wastewater treatment, evaporation plays a critical role in concentrating solutions, reducing waste volumes, and recovering valuable byproducts. Traditional evaporators, however, are often energyintensive and costly to operate — especially when handling large volumes of water or heatsensitive materials. Raj Process addresses these challenges with Mechanical Vapor Recompression (MVR) technology, a sustainable and highly efficient solution that drastically reduces energy consumption by recycling vapor generated during evaporation. This innovation represents a smart evolution in evaporator design, focusing on sustainability, efficiency, and longterm cost savings. How It Works The principle behind MVR technology is simple yet powerful: instead of discarding vapor created during boiling, the system reuses it. In an MVR evaporator, vapor is compressed using a mechanical compressor or fan, which raises its pressure and temperature. This “reenergized” vapor is then used as the heat source for continued evaporation. By recycling vapor repeatedly, MVR systems require up to 90% less external steam compared to conventional multieffect evaporators, resulting in significant savings in fuel, steam generation, and overall operating costs. Key Advantages Energy Efficiency: Reuses latent heat from vapor, drastically reducing energy consumption. Lower Operating Costs: Reduced steam and fuel requirements deliver fast ROI. Gentle on HeatSensitive Products: Operates at lower boiling temperatures under vacuum, ideal for dairy, fruit concentrates, enzymes, and pharmaceuticals. Compact Footprint: Smaller than traditional multieffect setups, saving space and simplifying integration. Scalable & Customizable: Suitable for both small batch operations and largescale continuous processing. Applications Across Industries Distilleries: Concentrating spentwash or thin stillage Dairy: Producing milk powder or whey concentrate Textile & Dye: Recovering and reusing process water Pharmaceuticals & Biotech: Concentrating active ingredients or intermediates Food & Beverages: Juice concentrates, tomato paste, flavor extracts Wastewater Treatment: Reducing highCOD industrial effluents Challenges & Considerations While MVR evaporators offer unmatched efficiency, the compressor is a critical component that requires careful selection, operation, and maintenance. Initial investment costs are higher than conventional systems, but longterm utility savings and sustainability benefits make them a costeffective choice for forwardthinking industries.