Spray Dryer - Industrial Dryer Manufacturer & Drying Systems

Quick Spray Dryer Selection Factors

Evaluating these core parameters helps our engineers configure

the right drying system for your process.

Is your feed a solution, slurry or emulsion?

The physical state, viscosity, and pumpability of your raw material dictate the type of atomizer and feed pump required.

How much water must be evaporated?

Capacity is measured by water evaporation per hour (kg/h), not just feed rate. This determines the drying chamber dimensions and thermal load.

Which atomization method fits the feed?

Choose between high-speed centrifugal discs or high-pressure nozzles based on feed abrasiveness, desired particle size, and maintenance preferences.

What particle size and moisture are required?

Final moisture content, bulk density, and particle size distribution targets influence the operating temperatures and system configuration.

Which heat source is available?

Electricity, steam, natural gas, or thermal oil. The available utility directly impacts the design of the air heating system and operational costs.

How should the powder be recovered?

Depending on environmental standards and product value, recovery may involve single cyclones, secondary cyclones, bag filters, or wet scrubbers.

Send Your Material Data

JEXDRY Spray Dryer Product Series

Explore our core industrial spray drying platforms, configurable for

diverse liquid-to-powder applications.

LPG Series High-Speed Centrifugal Spray Dryer

• Centrifugal or rotary-disc atomization.
• Eight brochure-listed models.
• 3–1000 kg/h water evaporation range.
• Suitable for selected pumpable solutions, emulsions, suspensions and slurries.

View LPG Centrifugal
Spray Dryers

YPG Series Pressure Spray Dryer

• Pressure-nozzle atomization.
• Four nominal capacities.
• 12.5–100 kg/h evaporation range.
• 1.6–2.5 MPa working pressure.

View YPG Pressure
Spray Dryers

ZPG spray dryer for traditional Chinese medicine extract

ZPG Series Extract Spray Dryer

• Application-specific configuration for traditional Chinese medicine extracts.
• Selection depends on concentration, viscosity, stickiness and thermal behavior.

View ZPG Extract
Spray Dryers

Not Sure Which Series Fits Your Material?

Ask a Process Engineer

What Is a Spray Dryer?

A spray dryer is an industrial drying system that converts a pumpable liquid feed into powder by atomizing the feed into fine droplets, contacting the droplets with controlled hot air, evaporating moisture and separating the dried particles from the exhaust air.

Process Integration: Spray drying combines moisture evaporation and particle formation into a single, continuous step.
Feed Versatility: The feed may be a solution, suspension, slurry, emulsion or pumpable concentrate.
Evaluation Required: Product suitability depends on more than just pumpability. Feed solids, viscosity, thermal sensitivity, stickiness, abrasiveness and solvent properties must be rigorously evaluated.

Industrial spray dryer cross section showing atomization, drying and powder collection

How Does a Spray Dryer Work?

The continuous liquid-to-powder transformation occurs through

four critical stages within the drying system.

1

Atomization

What happens: Liquid feed is pumped to an atomizer (centrifugal disc or pressure nozzle) which breaks it into millions of fine droplets.

Why it matters: Small droplets usually dry faster due to massive surface area, but can increase the fine-powder load.

Risk: Large droplets may remain wet or reach the chamber wall before drying, causing deposits.

2

Spray-Air Contact

What happens: The droplet cloud meets controlled hot air introduced through an air distributor at the top of the chamber.

Why it matters: Proper air distribution affects droplet residence time and prevents them from immediately hitting the walls.

Risk: Poor mixing leads to uneven drying and severe chamber wall deposition.

3

Moisture Evaporation

What happens: Heat transfers rapidly to the droplets, evaporating the solvent and forming solid particles in seconds.

Why it matters: Outlet air conditions relate more closely to final drying status and powder moisture than inlet temperature alone.

Risk: Excessive heat damages sensitive products; insufficient heat leaves powder sticky.

4

Powder Separation

What happens: Exhaust air carries particles to separation units like cyclones and bag filters where powder is collected.

Why it matters: Cyclones and filters recover different powder fractions (coarse vs. fines), impacting overall yield.

Risk: Inadequate separation leads to product loss and emissions.

Read more about the spray drying process →

How a spray dryer atomizes liquid feed and separates dry powder

Main Components of a Spray Dryer System

Main components of an industrial spray drying system

Feed Pump

Function: Delivers liquid to the atomizer. Selection: Screw pumps for slurries, diaphragm pumps for high-pressure nozzles. Maintenance: Stator wear, seal integrity.

Atomizer

Function: Creates droplet cloud. Selection: Centrifugal vs pressure based on required particle size and feed viscosity. Maintenance: Bearings, disc/nozzle wear, vibration.

Air Heater

Function: Heats process air. Selection: Steam, electric, or gas based on site utilities and max inlet temp required. Maintenance: Element scaling, burner tuning.

Air Distributor

Function: Mixes hot air with spray. Selection: Design dictates flow pattern (co-current, counter-current). Maintenance: Cleaning to prevent charring.

Drying Chamber

Function: Provides residence time for evaporation. Selection: Diameter and straight-side height based on evaporation duty and trajectory. Maintenance: Wall inspection, CIP efficiency.

Cyclone Separator

Function: Primary powder recovery. Selection: Sized for specific air volume and particle cut-point. Maintenance: Airlock valve function, blockage clearing.

Bag Filter

Function: Captures remaining fines. Selection: Filter media compatibility with product and temperature. Maintenance: Bag replacement, pulse-jet cleaning system.

Request a Process Flow Diagram

What Types of Spray Dryers Are Available?

Equipment configurations vary by atomization method and process layout to

meet specific powder criteria.

By Atomization Method

Centrifugal / Rotary Atomizer Spray Dryer Uses a high-speed rotating disc. Highly flexible for varying feed rates and viscosities. (JEXDRY LPG Series)
Pressure Nozzle Spray Dryer Uses high-pressure pumps. Produces narrower particle size distribution and higher bulk density. (JEXDRY YPG Series)
Two-Fluid Nozzle Spray Dryer Uses compressed gas to atomize liquid. Common for lab scale or highly viscous pastes. (Optional configuration)

By Process Configuration

Single-Stage Spray Dryer Drying is completed entirely within the chamber. Standard for many chemical and food products.
Multi-Stage / Fluid-Bed Finishing Combines spray drying with an internal or external fluid bed for agglomeration or final cooling. (Industry reference/Optional)
Open vs. Closed-Cycle Standard open-cycle exhausts to atmosphere.
Important: Solvent-based or oxygen-sensitive feeds require a dedicated closed-cycle (nitrogen) and safety evaluation. A standard open-cycle dryer must not be assumed suitable.

Types of spray dryers by atomization method and process configuration

Centrifugal vs Pressure Nozzle Spray Dryer

There is no universally superior atomizer. Selection depends on feed properties,

powder targets, capacity and maintenance conditions.

Selection Factor	Centrifugal Atomizer (LPG)	Pressure Nozzle (YPG)
Atomization principle	High-speed rotating disc or wheel	Liquid is forced through a nozzle under pressure
Main control variables	Rotation speed, feed rate, disc design, feed properties	Pressure, nozzle geometry, feed rate, feed properties
Feed pressure	Does not normally rely on high liquid pressure	Requires a high-pressure pump system
Feed variation	Can offer flexibility for selected variable feeds	Requires stable, nozzle-compatible feed
Blockage risk	No narrow pressure-nozzle orifice	Nozzle can block if feed contains oversized particles or crystals
Maintenance focus	Bearings, vibration, balance and disc wear	Nozzle wear, blockage and high-pressure pump condition
Spray pattern	Radial spray from a rotating disc	Directed spray pattern from one or more nozzles

Compare LPG and YPG for Your Feed

Centrifugal atomizer versus pressure nozzle spray dryer comparison

Spray Dryer Specifications at a Glance

Series	Atomization	Available Models	Brochure Evaporation	Reference Data
LPG	Centrifugal	LPG-5 to LPG-1000	3–7 to 800–1000 kg/h	Inlet 130–300°C; outlet 70–90°C
YPG	Pressure nozzle	YPG-12.5 to YPG-100	12.5–100 kg/h	Working pressure 1.6–2.5 MPa
ZPG	Application-specific	Confirm current models	Project-specific	Designed for extract applications

Parameter Disclaimer: Water evaporation capacity is not finished powder output. Actual capacity depends on feed rate, solids content, viscosity, feed temperature, solvent load, target moisture and ambient conditions.

The listed inlet and outlet temperatures are brochure equipment ranges, not recommended settings for every material. Final dimensions, heating duty, fan capacity and system layout require project-specific calculations.

View Full Model Specifications

What Materials Can Be Spray Dried?

Spray drying is applied across industries requiring controlled

liquid-to-solid transformation.

Food and Beverage

Coffee, egg products, flavors, starch derivatives, maltodextrin, plant proteins, and nutritional ingredients.

Dairy Processing

Specialized systems for whole milk, skim milk, and whey powder processing requiring strict hygiene and solubility control.

Milk Powder Spray Dryer for Dairy Processing →

Pharmaceutical

Excipients, fermentation products, enzymes, and selected intermediates. (Hygiene and documentation subject to project review).

Chemical Industry

Dyes, pigments, inorganic salts, catalysts, polymer-related feeds, and selected chemical solutions.

Ceramics & Minerals

Ceramic slurries, metal oxides, mineral suspensions, and advanced-material precursors.

Botanical Extracts

Traditional Chinese medicine extracts and selected heat-sensitive concentrates prone to wall sticking.

Check Whether Your Material Can Be Spray Dried

When Is Spray Drying the Right Choice?

Suitable for Evaluation

• Feed is pumpable and atomizable.
• Dry powder is the required final form.
• Continuous, automated production is preferred.
• Final moisture control matters.
• Specific particle size or powder morphology is needed.
• Rapid liquid-to-powder processing prevents degradation.

Review Carefully

• Feed is extremely viscous or acts as a wet cake (consider Flash Dryer).
• Product becomes highly sticky within drying temperatures.
• Suspended solids settle too rapidly to pump.
• Feed is highly abrasive or corrosive.
• Feed contains organic solvent (requires closed-cycle).
• Feed is very dilute, creating excessive evaporation cost.

How Is Spray Dryer Capacity Calculated?

Spray dryer capacity should normally be evaluated by the amount of liquid that must be evaporated per hour, not only by liquid feed rate or finished powder output.

Mass Balance Formula:

P = F × S ÷ (1 − M)

E = F − P

F = liquid feed rate (kg/h)
S = dry-solids fraction of the feed (%)
M = final powder moisture fraction (%)
P = finished powder output (kg/h)
E = water evaporation load (kg/h)

Illustrative calculation only. Final equipment selection requires engineering verification based on thermal mass balance.

Get a Water Evaporation Calculation

Spray dryer water evaporation and finished powder output calculation

Common Spray Drying Problems & Responses

Process optimization requires matching equipment design to material behavior.

Chamber Wall Deposition

Cause: Droplets hit wall before drying, stickiness, or poor air distribution.

Response: May require adjusting atomizer trajectory, lowering feed rate, or adding air sweep systems.

Wet Powder

Cause: Insufficient thermal energy, high feed rate, or low outlet temperature.

Response: Can often be improved by increasing inlet temp or decreasing feed rate, subject to product testing.

Excessive Fines

Cause: Over-atomization, low feed viscosity, or brittle particles.

Response: Depending on the root cause, lower atomizer speed or pressure, or integrate fines-return.

Nozzle Blockage

Cause: Oversized suspended solids or crystallization in feed lines.

Response: Requires feed filtration review or switching to a centrifugal atomizer.

Low Powder Recovery

Cause: Inefficient cyclone separation or bag filter bypass.

Response: Requires an engineering review of exhaust air volume and cyclone cut-point.

Atomizer Vibration

Cause: Imbalanced disc due to wear or uneven feed distribution.

Response: Requires immediate cleaning, bearing check, and dynamic re-balancing.

Discuss Your Spray Drying Problem

How to Choose the Right Spray Dryer

1

Confirm pumpability

Ensure the feed can be reliably pumped to the atomizer.
2

Define feed properties

Document solids content, viscosity, and feed temperature.
3

Assess material risks

Evaluate heat sensitivity, stickiness, abrasiveness, and corrosion.
4

Set powder targets

Define final moisture, particle size, and bulk density.
5

Calculate evaporation duty

Determine water/solvent removal rate to size the chamber.
6

Compare atomization methods

Select centrifugal or pressure nozzle based on feed and powder goals.
7

Select heating and recovery

Match heat source to utilities and design cyclone/filter systems.
8

Confirm site details

Review material of construction, cleaning, safety, and installation space.

Required Data for Sizing

To receive an accurate proposal, please prepare:

• Product name & Feed type
• Feed rate (kg/h)
• Initial moisture / total solids
• Feed viscosity & temp
• Thermal sensitivity limit
• Solvent information
• Target powder output
• Target final moisture
• Target particle size
• Available heat source
• Installation height limit

Get a Spray Dryer Recommendation

Factors that determine industrial spray dryer price and project cost

What Determines Spray Dryer Price?

Industrial spray dryers are engineered systems. A meaningful quotation requires feed data and a defined supply scope.

• Water evaporation duty
• Atomization method
• Chamber dimensions
• Product-contact material
• Surface-finish requirement
• Heat source & Air filtration
• Powder recovery design
• Exhaust treatment
• Cleaning configuration
• Control and automation
• Solvent & dust-safety
• Installation & commissioning

Note: Two prices cannot be compared correctly unless evaporation basis, material, heat source, powder recovery and included auxiliaries are also identically compared.

Request a Configuration-Based Quote

Why Choose JEXDRY?

Engineering and manufacturing drying solutions since 1998.

Established 1998

Decades of manufacturing experience in industrial drying and powder processing equipment.

Complete Series

LPG, YPG and ZPG series offering centrifugal and pressure atomization options.

Data-Driven Sizing

Equipment selection strictly based on feed data, water evaporation duty, and thermal mass balance.

System Integration

Integration with related upstream preparation and downstream powder-processing equipment.

Trusted Production & Testing Facilities

In-house manufacturing ensuring strict quality control from raw materials to final assembly.

Advanced Manufacturing Facility

State-of-the-art fabrication of stainless steel drying chambers.

Material Testing Center

Pilot testing to guarantee optimal drying parameters before production.

In-House FAT & Assembly

Comprehensive Factory Acceptance Testing (FAT) prior to shipment.

Request Technical Information

Frequently Asked Questions

What is a spray dryer and how does it work?

A spray dryer is an industrial machine that rapidly transforms a liquid feed (solution, suspension, or emulsion) into a dry powder. It works by atomizing the liquid into fine droplets inside a drying chamber, where they immediately contact hot gas (usually air or nitrogen). The moisture evaporates almost instantly, leaving behind dry, uniform powder particles that are then collected.

What liquids and slurries can be spray dried?

Almost any pumpable liquid can be spray dried. This includes aqueous solutions, emulsions, suspensions, and slurries across various industries. Common applications range from food and dairy (milk, coffee), pharmaceuticals, and chemicals to advanced materials like ceramics, battery precursors, and polymers.

How is spray dryer capacity calculated?

Capacity is primarily determined by the water (or solvent) evaporation rate, measured in kg/h. This is calculated based on the heat balance: utilizing the inlet and outlet air temperatures, the specific heat of the drying gas, and the volume of air flowing through the system to determine how much moisture can be removed per hour.

Why is water evaporation different from powder output?

Water evaporation capacity refers to the amount of liquid the dryer removes per hour (kg/h). Powder output is the final mass of the dried product. Output depends entirely on the initial solid concentration of your feed. For example, a dryer evaporating 100 kg/h of water will produce more powder from a 50% solid feed than from a 20% solid feed.

How do I choose between a centrifugal atomizer and a pressure nozzle?

Centrifugal atomizers use a high-speed rotating disc, offering excellent flexibility for varying feed rates and handling viscous or slightly abrasive feeds without clogging. Pressure nozzles force liquid through a small orifice using high-pressure pumps, producing a narrower particle size distribution and higher bulk density, but they require a stable, clean feed to prevent blockage.

When is a two-fluid nozzle used?

Two-fluid (pneumatic) nozzles use compressed air or gas to atomize the liquid feed. They are typically used for highly viscous liquids that are difficult to pump at high pressures, in lab-scale or pilot-scale spray dryers, and for applications requiring extremely fine particle sizes.

What controls particle size and residual moisture?

Particle size is primarily controlled by the atomization method, atomizer speed (for centrifugal) or pump pressure (for nozzles), and the viscosity of the feed. Residual moisture is controlled by the outlet air temperature; maintaining a higher outlet temperature generally results in lower residual moisture in the final powder.

How do cyclone and bag-filter collection systems differ?

Cyclones use centrifugal force to separate larger, denser particles from the exhaust air, typically recovering 90-95% of the product without filter media. Bag filters use fabric sleeves to capture the remaining fine dust, ensuring near 100% recovery and clean exhaust. Most industrial systems employ a primary cyclone followed by a secondary bag filter.

Can a spray dryer process heat-sensitive materials?

Yes. Although the inlet air temperature is high, the rapid evaporation process cools the surrounding air, keeping the actual droplet temperature relatively low (close to the wet-bulb temperature). The residence time in the heat zone is also extremely short (seconds), preventing thermal degradation of heat-sensitive materials like proteins, enzymes, and flavors.

How can wall sticking and nozzle blockage be reduced?

Wall sticking can be mitigated by optimizing the atomizer trajectory, improving hot air distribution, utilizing air sweeps, or employing specialized chamber cooling jackets for thermoplastic materials. Nozzle blockage is prevented by proper in-line feed filtration, maintaining consistent feed viscosity, and selecting the correct nozzle orifice size.

Which heating source should I choose?

The ideal heating source depends on your local energy costs, product purity requirements, and available infrastructure. Options include electricity (clean and precise, but often expensive for large scales), steam (ideal and cost-effective if a boiler is already available), natural gas (direct or indirect fired, common for high capacity), and thermal oil.

When is spray drying not the right drying method?

Spray drying is unsuitable if the feed cannot be pumped or atomized (e.g., highly cohesive pastes or solid chunks). It is also not ideal if you require very large, dense granules (where fluid bed drying might be better) or if the material is extremely sticky and melts below normal drying temperatures without specialized cooling capabilities.

What information is required for an accurate quotation?

To provide a precise design and quote, our engineering team needs to know: the material name, initial moisture content (solid percentage), target final moisture, required evaporation capacity or powder output (kg/h), maximum allowable heating temperature, and your preferred or available heating source.

How are installation, commissioning and training arranged?

JEXDRY provides comprehensive global support. After in-house manufacturing and Factory Acceptance Testing (FAT), the system is shipped to your facility. Our experienced engineers can then travel to your site to supervise installation, conduct full commissioning, and provide hands-on training for your operators to ensure optimal system performance.

Tell Us What You Need to Convert into Powder

Submit your material data below. JEXDRY engineers will evaluate suitability, calculate evaporation load, and recommend an LPG, YPG, or application-specific configuration.

Email

zar@jexdry.com

Phone / WhatsApp

+86 137 7501 3369

Factory Address

Jiaoxi Industrial Zone, Zhenglu Town, Tianning District, Changzhou, Jiangsu Province, China

Name *

Business Email *

Product / Material *

Feed Rate (kg/h)

Feed Solids (%)

Target Final Moisture (%)

Additional Requirements (Viscosity, Heat Source, etc.)

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Industrial Spray Dryer Systems for Liquid-to-Powder Processing