Overview

Pressure Spray Dryer

A Pressure Spray Dryer uses a high-pressure pump to force liquid feed through a small nozzle, creating fine droplets that quickly contact hot air in the drying chamber.

This system has a simple structure, relatively low energy consumption, and is suitable for medium to large-scale production.

50-350μm

Particle Size Range

2-10MPa

Pump Pressure

<5%

Final Moisture

Pressure Spray Dryer

Principle

Designed for optimal particle uniformity and thermal efficiency.

Pressure Spray dryer diagram

Schematic Diagram of Pressure Spray Drying

01

Feed Preparation

The liquid feed (solution, slurry, or emulsion) is prepared by filtering and adjusting properties such as concentration and viscosity to ensure stable atomization.

02

High-Pressure Pumping

The high-pressure pump pressurizes the liquid feed to typically 2 to 20 MPa, providing the energy required for atomization without using compressed air.

03

Pressure Atomization

The pressurized liquid is forced through a specially designed nozzle, breaking it into a fine, uniform mist of micro-droplets.

04

Hot Air Contact

Preheated drying air is introduced into the drying chamber, often in a co-current or counter-current flow direction relative to the droplets.

05

Particle Formation

The hot air contacts the fine droplets, causing rapid and intense evaporation of moisture from their surfaces. The droplets are quickly dried into solid particles within seconds.

06

Separation & Collection

The dried powder particles settle at the chamber bottom or are carried to a cyclone for capture, while the exhaust air is cleaned and safely discharged into the atmosphere.

Core Component - Pressure Nozzle Atomizer
Pressure Nozzle Atomizer

Pressure Nozzle Atomizer

Droplet Size Range

Pressure Nozzle
Pressure (MPa) Droplet Size D50 (μm)
1.5 - 2.0 150 - 350
2.5 - 5.0 50 - 150
5.0 - 10.0 30 - 50
10.0 - 20.0 15 - 30

The table above provides reference data on size ranges for low-viscosity, Newtonian fluids.

Features

Key Technical Features

Particle Morphology

Moisture evaporation leads to the formation of solid or hollow spherical particles. This microspherical morphology results in the powder excellent flowability.

Narrow Distribution

Pressure spray drying typically produces relatively large particles, generally ranging from 100 to 300 microns. More importantly, it yields a narrow particle size distribution.

Wide Feed Range

It is most suitable for homogeneous solutions or suspensions with low-to-medium viscosity and moderate solid content (typically 10%-50%).

Energy Efficiency

Pressure atomization has higher energy conversion efficiency than centrifugal spray drying, leading to lower energy use in large-scale continuous production.

Simple Structure

Without high-speed mechanical parts, the pressure nozzle has minimal wear. Maintenance is simple and convenient.

Continuous Production

Pressure spray drying is optimized for industrial scale, continuous operation. It features high automation and large capacity.

Specification

YPG Series Data Sheet

Parameter YPG-50 YPG-100 YPG-150 YPG-200 YPG-300 YPG-500 YPG-1000

Evap. Capacity

 50 kg/h 100 kg/h 150 kg/h 200 kg/h 300 kg/h 500 kg/h 1000 kg/h

Chamber Diameter

 Ø1,600 mm Ø2,000 mm Ø2,400 mm Ø2,800 mm Ø3,200 mm Ø3,800 mm Ø4,600 mm

Pump Pressure

 2-10 MPa

Inlet Temp.

 140-350 °C

Final Moisture

 < 5%

Recovery Rate

 > 97%

Heat Source

 Elec. / Steam Elec. / Steam / Oil / Gas

* All specifications subject to change. Contact our engineering team for custom configurations and material-specific process parameters.

Download Full Technical Datasheet

Get the complete specifications, and performance data in one document. PDF · ~2MB

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Applications

Typical Drying Applications Across Multiple Industries.

Food & Additives

  • Whole Milk Powder
  • Instant Coffee
  • Maltodextrin
  • Soy Milk Powder
  • Chicken Essence

Chemicals

  • Laundry Powder
  • Surfactants
  • Dye Intermediates
  • Calcium Carbonate
  • Sulfates

Ceramics

  • Alumina
  • Zirconia
  • Silicon Nitride
  • Silicon Carbide
  • Tungsten Carbide

Agrochemical

  • Mancozeb WP
  • Imidacloprid WDG
  • Glyphosate WDG
  • Manganese Sulfate
  • Urea Phosphate

FAQ

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

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What is the difference between a pressure spray dryer and a rotary atomizer spray dryer?

Briefly, the difference is in two main respects:

  • Atomization – Pressure nozzle uses a high-pressure pump; rotary atomizer uses a high-speed spinning disc.
  • Particles – A pressure type makes large, flowable spheres; a rotary type makes fine, uniform powder.
What is the required feed solid content for a pressure spray dryer?
Typically 30%–60% for most common applications.
Will the nozzle get clogged?

Yes. Common causes include:

  • Oversized solid particles in the feed
  • Insufficient filtration of the feed
  • Excessively high viscosity of the feed
Does the feed material have viscosity requirements?
The feed viscosity should typically be < 300–500 cP.
Why are pressure spray dryers generally so large?

The process inherently requires a large dryer volume.

  • Height – Ensures sufficient drying time for droplet descent.
  • Diameter – Prevents spray cone from hitting the wall, allows uniform air distribution, and accommodates large evaporation loads.
What is the lead time?

Typically 12–16 weeks, depending on design complexity and customization requirements.