Lab Spray Dryer: Process, Working, Stages & Applications

 

Spray Dryer Operational Phases and Their Role in Process Optimization

Components of Spray Dryers and Their Functions

Different Phases of the Spray Drying Process and Their Role in the Moisture Removal Process

1. Pre-drying Feed Preparation Phase
2. Atomization – Choose the Right Type
3. Heating the Compound Droplets
4. Moisture Removal
5. Powder Separation
6. Final Product Collection
7. Recirculation of Undried Liquid (Advanced Systems)

Industrial Applications of Spray Dryers

Lab, Pilot, and Industrial Scale Spray Dryers by Achieve Chem

Features and Specifications of Our Lab, Pilot, and Industrial Spray Dryers 6

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FAQs

 

Spray drying is an efficient technique for converting liquids, solutions, slurries, suspensions, and emulsions into fine powders. Using atomization, the liquid compound is broken into small droplets, which facilitates drying and enables low-temperature drying. As a result, pilot-scale and lab spray dryers are widely used across multiple industries, including food, pharmaceutical, chemical, and biotechnology sectors.

 

In this blog, we will cover the operational phases, components, and applications of a lab and pilot spray dryer to provide you with critical insights for overall drying optimization.

 

 

Understanding spray dryer components allows you to modify the equipment to meet your requirements and optimize the drying process through system-level modularity.

 

Feed Pump System:

• Transfers liquid feed at a controlled flow rate.
• Ensures steady, uniform input to the system.
• Importance: Maintains process consistency and prevents fluctuations in final product quality.

 

Atomizer (Nozzle / Rotary Disc):

• Converts liquid into fine droplets
• Increases surface area for rapid drying
• Importance: Directly influences particle size, drying rate, and overall efficiency of moisture removal in spray drying.

 

Drying Chamber

• Provides space for hot air–droplet interaction
• Enables rapid moisture evaporation
• Importance: Core zone where heat and mass transfer occur, defining product characteristics.

 

Air Heating System

• Generates and controls the hot air supply
• Regulates inlet temperature
• Importance: Critical for achieving optimal drying without degrading heat-sensitive materials.

 

Air Distribution System

• Distributes hot air evenly within the chamber
• Prevents dead zones and uneven drying
• Importance: Ensures uniform drying and consistent particle formation.

 

Cyclone Separator/Bag Filter

• Separates fine powder from exhaust air
• Minimize product loss
• Importance: Enhances product recovery and improves process efficiency.

 

Exhaust Air System (Fan / Blower)

• Removes humid air from the chamber
• Maintains airflow and pressure balance
• Importance: Prevents moisture buildup and ensures continuous drying.

 

Product Collection System

• Collects dried particles efficiently
• Prevents contamination and degradation
• Importance: Preserves product quality and supports safe handling.

 

Control System (PLC / Automation Panel)

• Monitors temperature, pressure, and flow parameters
• Enables automation and precise adjustments
• Importance: Ensures process optimization, repeatability, and operational safety.

 

 

The spray drying process is completed in multiple phases, each with its own role. Only through the synchronization of each phase can optimal drying be achieved. The following sections explain the stages of spray drying process explained in simpler terms:

 

1. Pre-drying Feed Preparation Phase

Depending on the ingredients, the liquid feed/solution/emulsion is conditioned and prepared before being sent into the drying chamber.

• Role in Drying: Ensuring optimal atomization, helps in handling high-viscosity feed, concentrating feed, uniform mixing of all raw materials, and pre-treating heat-sensitive feed for protection.

 

2. Atomization – Choose the Right Type

In this phase, the liquid feed is passed through a nozzle at very high pressure, which turns it into tiny droplets.

• Role in Drying: The role of atomization in spray drying performance is crucial, as it increases the surface area of ​​the liquid feed to facilitate drying and enables low-temperature drying.
• ○ Types of Atomization:
  • Pressure Nozzle Atomization: Uses high pressure to form fine droplets.
  • Rotary (Centrifugal) Atomization: Spinning disc breaks liquid into droplets.
  • Two-Fluid Atomization: Compressed air assists droplet formation.

 

3. Heating the Compound Droplets

As soon as atomization begins, hot air (typically 200–300°C) is introduced into the drying chamber to heat the feed droplets and initiate drying.

• Role in Drying: This phase initiates drying and is crucial to achieving it in the shortest possible time.

 

4. Moisture Removal

The heating and atomization continue until the feed is fully processed and all moisture has been removed, yielding the final dry powder.

 

• Role in Drying: Core of the drying process and converts the liquid feed into dried powder using the perfect balance of atomization and heating.
• Note: The temperature and residence time must be adjusted for the compound to prevent thermal degradation.

 

5. Powder Separation

The dried powder is separated using specialized filters or cyclone separators to maximize yield and remove air.

 

• Role in Drying: Increases the product recovery rate and minimizes loss.

 

6. Final Product Collection

This is the final phase, in which the dried powder is collected and examined to ensure it meets all requirements, including moisture content, particle size, and output volume.

 

• Role in Drying: Ensures a closed-loop process to prevent external contamination and maintain high-purity standards.

 

7. Recirculation of Undried Liquid (Advanced Systems)

In modern spray dryers, there is an additional process, known as recirculation. Here, the undried material is collected and sent back to the spray drying chamber

 

Speak with our engineer for professional guidance on optimizing each spray-drying phase.

 

 

 

 

 

Achieve Chem designs and manufactures spray dryers for small to large-scale applications. Moreover, we facilitate the industrial spray drying process for powders with professional installation and maintenance support. With over 4,500 installations, we have helped manufacturers achieve accurate lab results, replicate them at the pilot scale, and fully scale up to commercial production.

 

Features and Specifications of Our Lab, Pilot, and Industrial Spray Dryers

 

 

 

Lab-scale Spray Dryer

 

• Choose a borosilicate glass drying chamber for real-time monitoring or a stainless steel one for higher durability.
• An LCD touchscreen for better control over the drying parameters.
• Superior temperature control for complete moisture removal without heat damage.
• Inlet and outlet temperature range: 30~150ºC.
• Two-fluid nozzle with customizable sizes to suit your requirements.

 

Pilot-scale Spray Dryer

 

• Precise and adjustable feed rate range: 50-5000mL/h.
• Temperature range of 40-350°C to handle a wide range of feeds.
• Highly durable 304 stainless steel is used for construction.
• High energy efficiency for better, more cost-efficient solutions.
• CE certifications, GMP-compliant design, and multiple quality certifications.

 

Industrial-scale Spray Dryer

 

• Adjustable inlet (30–300°C) and outlet (80–90°C) temperatures.
• Electrical heating source for precise temperature control.
• Capacity range: 10L/h, 15L/h, 20L/h, 50L/h, 100L/h.
• Modular design for full customization as per your production demands.

 

 

We have a streamlined procurement process, where all you need to do is explain your requirements, and we will provide you with the exact price quote. Moreover, our engineers will provide comprehensive assistance in choosing the right equipment.

 

Request a quoteorspeak with our engineersto learn more about our services.

 

 

Question 1. How are custom spray dryers manufactured at Achieve Chem?

Ans: We design and manufacture custom spray dryers in our ISO-certified facilities. Equipment is designed per your requirements, with you always in the manufacturing loop, so you are aware of developments.

 

Question 2. Why is spray drying used for heat-sensitive compounds?

Ans: Heat-sensitive compounds are dried with spray drying because:

 

Question 3. What is a pilot-scale spray dryer?

Ans: They are used for intermediate production before the transition from lab to commercial-scale manufacturing. A pilot-scale spray dryer helps you identify areas for improvement and verify whether lab-scale results can be replicated at larger feed volumes.

 

Question 4. What is the importance of following compliance regulations?

Ans: Here is why you need to comply with the strict regulations:

 

Question 5. Can I choose the atomization type for my spray dryer?

Ans: Yes, at Achieve Chem, you can customize spray dryers to answer your particular production challenges, which also include the atomization type. You can opt for centrifugal, two-fluid, or other atomization types.