Overview

Spary Dryer

A spray dryer is an industrial drying system used to convert a liquid feed into a dry powder in one continuous process. The feed can be a solution, suspension, slurry, or emulsion.

Spray drying technology is essential because it combines rapid drying, powder property control, product stability. It is a key technology for transforming liquid formulations into high-quality powders used in many modern manufacturing processes.

Core Advantages

Rapid Drying

Takes only seconds, preventing thermal degradation of the product.

Controllable Particle Properties

You can control particle size, bulk density, morphology by adjusting parameters such as feed concentration, atomization pressure, and air flow rate.

One-step Formation

Spray drying combines drying and powder formation in a single process. It can reduce the need for additional operations such as grinding, crystallization, or filtration.

5-300µm

Particle Size Range

<3%

Residual Moisture

≥95%

Product Yield Rate

Principle

Continuous atomization-evaporation-separation process converting liquid feed into free-flowing powder.

Working principle diagram

Schematic Diagram of Spray drying

01

Atomization

The liquid feed (which can be a solution, suspension, or emulsion) is pumped into the atomizer. The atomizer breaks the liquid into millions of microscopic droplets, drastically increasing its surface area.

02

Evaporation

Hot air contacts atomized droplets. Moisture evaporates almost instantly (usually within seconds). As the water or solvent evaporates, the droplet cools down, which protects heat-sensitive materials from heat damage.

03

Particle Formation

Dried particles settle to the cone base. Morphology and bulk density controlled by feed concentration, atomizer type, and air temperature profile.

04

Separation & Collection

The moisture-laden air, along with finer particles, is pulled into a cyclone separator or a bag filter, which separates the final powder from the exhaust air.

Atomization

Select the atomization mechanism that matches your feed properties, required particle morphology, and throughput.

Rotary Atomizer Spray Dryer

Rotary Atomizer Spray Dryer

High-speed rotating disc atomizes feed into fine droplets. Ideal for slurries, pastes, and heat-sensitive materials.

Pressure Nozzle Spray Dryer

Pressure Spray Dryer

High-pressure pump forces feed through a single-fluid nozzle. It produces coarser, denser particles.

Two Fluid Nozzle Spray Dryer

Two Fluid Nozzle Spray Dryer

It utilizes compressed gas and liquid feed to produce fine, uniform droplets for efficient spray drying.

Technology Comparison

Parameter ● Centrifugal ● Pressure ● Pneumatic
Atomization Method High-speed rotating disc High-pressure mechanical nozzle Compressed air + two-fluid nozzle
Formed Particle Size 20 - 250 μm

Medium, uniform spherical

 50 - 350 μm

Coarse, dense granules

 10 - 100 μm

Fine to ultra-fine powder
Production Scale Pilot to large-scale industrial (kg/h - t/h) Medium to large industrial (t/h) Lab / pilot scale (g/h - kg/h)
Feed Viscosity Wide range Low to medium viscosity Low to medium viscosity
Energy Consumption Moderate Relatively low atomization energy Higher due to Comp. air consumption

Capacity Range

Select the configuration that matches your throughput requirements and scale-up roadmap.

Lab Spray Dryer

0.5-5

L/h Evaporation Capacity

  • Feed rate: 0.1 - 5 L/h
  • Inlet temperature: up to 220 °C
  • Atomizer: Two-fluid nozzle & mini centrifugal
  • Recovery Rate: 50% - 80%
  • Investment: Low

Pilot Spray Dryer

5-20

L/h Evaporation Capacity

  • Feed rate: 5 - 30 L/h
  • Inlet temperature: up to 250 °C
  • Atomizer: All Types
  • Recovery Rate: 70% - 90%
  • Investment: Medium

Industrial Spray Dryer

20-2000+

L/h Evaporation Capacity

  • Feed rate: 30 - 2000+ L/h
  • Inlet temperature: up to 350 °C
  • Atomizer: Centrifugal & pressure nozzle
  • Recovery Rate: 90% - 98%
  • Investment: High
All capacity figures are indicative. Final specs determined by material testing & process analysis.
Request Material Test

Applications

Each industry demands distinct process parameters, material handling standards, and regulatory compliance. Our spray dryer configurations are engineered to match.

Pharma

Pharmaceutical Spray Dryer

Engineered for APIs, liposomes and solid dispersions. Fully GMP-compliant with CIP/SIP capability, 316L stainless steel contact parts, and validated control systems for FDA submissions.

GMP FDA CIP/SIP Learn More

Food Industry

Food Spray Dryer

High-throughput systems for dairy, infant formula, flavors, and food additives. Optimized for heat-sensitive nutrients, fat-containing feeds, and hygroscopic powders with superior solubility.

Food Grade HACCP Learn More

Ceramics

Ceramic Spray Dryer

Robust systems for alumina, zirconia, silicon carbide, and advanced technical ceramics. Wear-resistant lining options, high-temperature capability, and precise granule morphology control for pressing.

Ceramic Lining High Temp Learn More

Chemical Industry

Chemical Spray Dryer

Versatile configurations for detergents, catalysts, dyes, and specialty chemicals. ATEX-certified explosion-proof designs for flammable solvents, with corrosion-resistant alloy options.

ATEX Closed-Loop Learn More
Custom configurations available for all industry segments
Request a Process Consultation
Selection Guide

How to Choose the Right Spray Dryer? Work through these four steps to identify the spray dryer configuration.

Not sure where to start? We'll figure it out with you.

Send us your feed liquid data sheet and we'll run a feasibility assessment at no charge — no purchase commitment required.

Request a Feed Trial
01

Define Your Material Characteristics

Most Critical

The physical and chemical properties of your feed are the single most decisive input for spray dryer selection. Characterize these before evaluating any other parameter -- they determine atomizer type, drying atmosphere, chamber geometry, and safety system requirements.

Heat-Sensitive Materials

Choose a spray dryer with tightly controlled outlet temperature. Consider freeze spray drying if extreme heat sensitivity.

High-Viscosity, Sticky, or High-Solids Slurry

High-viscosity feeds risk nozzle clogging with pressure or two-fluid atomizers. Rotary (centrifugal) atomizers handle viscous feeds continuously without clogging.

Organic Solvent-Based Feeds or Explosive Dust Risk

Use a closed-loop spray dryer with inert gas circulation to eliminate oxygen. Equip with explosion-proof components and pressure relief vents. Include solvent recovery system to economically reclaim solvents.

02

Select Atomizer Type

Atomizer selection is the primary lever controlling outlet particle size distribution (PSD), morphology, and bulk density. Match atomizer type to your D50 specification and feed properties before sizing the chamber.

Rotary (Disc) Atomizer

D50: 20 - 250 µm

Two-Fluid Nozzle

D50: 5 - 80 µm

Pressure Nozzle

D50: 50 - 350 µm

Actual particle size is also affected by material concentration, viscosity, feed rate, and drying temperature. The ranges shown above are typical values for common equipment configurations and should be used as reference only.

03

Determine Evaporation Capacity

System size is defined by water evaporation capacity (kg/h), not feed volume. Specify your target evaporation rate and operating mode (batch or continuous). These inputs drive chamber diameter, heater sizing, downstream collection configuration, and automation level.

Lab Scale

0.5 - 5 L/h evaporation

Pilot Scale

5 - 20 L/h evaporation

Production Scale

20 - 500+ L/h evaporation

04

Specify Construction & Regulatory Compliance

Contact material selection and applicable regulations must be confirmed before detailed engineering begins. jetmillMFG equipment is designed to comply with the following standards based on your industry and application:

  • GMP
  • FDA 21 CFR
  • ATEX
  • CE
  • HACCP

FAQ

Answers to the most common technical and commercial questions from procurement managers and process engineers evaluating spray dryers.

Still have questions?

Our engineers are available for a 30-minute technical consultation.

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How to control final particle size?

You can adjust particle size by changing the atomizer type, feed concentration, feed rate, hot air distribution, and drying chamber geometry.

What heating sources are available for a spray dryer?
Common heating options include electric heating, steam heating, natural gas heating, and waste heat recovery systems etc. Choosing a heat source depends on energy costs, required temperatures, hygiene standards, site utility conditions, and safety regulations.
Does a spray dryer need a CIP system?
For food, dairy, pharmaceutical, biotech applications, a clean‑in‑place system makes a lot of sense. CIP cuts down manual cleaning time, improves hygiene, reduces the risk of cross‑contamination.
What is the typical lead time for a spray dryer?

Lead time depends on the equipment size and the level of customization. Rough estimates:

  • Lab‑scale dryer – around 4–8 weeks
  • Pilot‑scale dryer – around 8–14 weeks
  • Industrial‑scale dryer – around 3–8 months
What factors affect the price of a spray dryer?

The price is usually driven by:

  • Processing capacity and evaporation rate
  • Atomization method
  • Heating system setup
  • Level of automation
  • Optional add‑ons like CIP, heat recovery, or explosion‑proof design
  • Whether the scope includes installation, commissioning, training, and validation