Liquid to powder / Process review
Centrifugal Spray Dryer
A centrifugal spray dryer turns a pumpable liquid or slurry into powder. Start with feed solids, viscosity and the required powder properties. The examples below show how to prepare project data. Dry granules and feed that cannot be atomized need a different process review.
Portfolio Demo · No equipment sales or live enquiries
Suitable Starting Point
Pumpable liquid or slurry that can form droplets. Feed must stay stable during pumping. Powder moisture, particle size and recovery need agreed targets and trials.
Not the First Choice
Dry granules, large wet lumps or feed that cannot be atomized. Unknown heat sensitivity, solvent content or dust risk requires review before selecting a process.
01 / Read the conditions
Sample Specifications
Sample specification data for website demonstration only. Do not use for equipment selection or purchasing.
Sample scenarios, not rated machine capacities. Values marked “Supplier to confirm” need project data and testing.
| Parameter | Unit | S-01 | S-02 | Basis / status |
|---|---|---|---|---|
| Feed type | — | Water-based liquid | Water-based liquid | Assumed |
| Feed rate | kg/h | 20 | 40 | Assumed |
| Feed solids | wt% of feed | 25 | 25 | Assumed |
| Powder moisture | wt%, wet basis | 5 | 5 | Assumed target |
| Powder output | kg/h | 5.26 | 10.53 | Calculated, losses ignored |
| Water evaporation | kg/h | 14.74 | 29.47 | Calculated, losses ignored |
| Atomization | Type | Centrifugal | Centrifugal | Illustrative process |
| Commercial model | — | No model assigned | No model assigned | Supplier to confirm |
| Inlet / outlet air temperature | °C | Process trial required | Process trial required | Supplier to confirm |
| Installed power / heat source | kW / type | Project-specific | Project-specific | Supplier to confirm |
| Overall dimensions | mm | Project-specific | Project-specific | Supplier to confirm |
Calculation: dry solids = feed rate × solids fraction. Powder = dry solids ÷ (1 − final moisture fraction). Evaporation = feed − powder. These examples retain all dry solids and ignore losses; actual collected powder will depend on the process.
02 / Prepare your project
Project Data Required
Use measured values where available. State the test temperature and moisture basis. Write “Unknown” for missing data.
- Feed composition
- Material, water or solvents, solids wt%, viscosity in mPa·s at a stated °C.
- Capacity and powder
- Feed kg/h or evaporation kg/h; final moisture and particle size target in µm.
- Process limits
- Heat sensitivity, sticking, recovery needs, cleaning method and dust information.
- Site conditions
- Heat source, power supply, available height and exhaust requirements.
RFQ workflow / Local demo
See How the RFQ Workflow Works
This is a local form demo. Use sample details only. Nothing is sent to a supplier or saved by this site.
Include the material, feed form, capacity with units, moisture in and out, temperature limit and available utilities. Write “Unknown” for values you do not have.
The demo checks required fields and text length. It does not select equipment or provide a price.
03 / Understand the process
Working Principle
- Prepare feed. Keep the liquid uniform and check pumpability.
- Form droplets. A rotating atomizer spreads feed into the chamber.
- Contact drying air. Heated air meets the droplets under controlled conditions.
- Evaporate water. Droplets lose moisture and form particles.
- Collect powder. Separate powder from the air stream and manage the exhaust.
Droplet size, air conditions and feed properties affect the result. A process trial establishes a usable operating window; this diagram does not predict powder yield.
Material Suitability
| Feed | Possible fit | Review first |
|---|---|---|
| Water-based solution | Powder formation | Solids, crystallization, heat sensitivity |
| Pumpable slurry | Droplet drying | Settling, viscosity, abrasion and blockage |
| Sticky or heat-sensitive feed | Trial required | Wall deposits, product damage and recovery |
| Solvent-containing feed | Specialist review required | Solvent properties, containment and safety design |
Dry crystals and wet granules may suit a fluid bed review. Solids that tumble in a batch may suit vacuum drying.
Define the Supply Scope
Agree a written equipment list and responsibility boundary before comparing quotations.
Core scope to confirm
Feed system, atomizer, drying chamber, powder collection and controls. Confirm materials of construction and access points.
Separately agreed
Heat generation, exhaust treatment, powder transfer, installation and commissioning support. Do not assume these are included.
Client site preparation
Utilities, foundations, building access and local approvals, unless the agreed contract assigns them elsewhere.
Utilities and Site Conditions
Share voltage, frequency, available heat source and utility limits. Confirm room height, maintenance access, lifting space and powder handling routes. The supplier needs these details to estimate demand and layout. Check exhaust discharge and waste handling with the site team.
Options to Review
Discuss contact materials, insulation, collection stages, cleaning access and control records. Cleaning-in-place, closed-loop operation or inert gas require a project-specific review. None is included by default, and this demo claims no certification or explosion protection.
Testing, FAT and Acceptance
Agree a representative feed sample, test duration and measurement method. Record feed rate, solids, powder moisture, particle size, recovery and wall deposits. Check cleaning access, controls and agreed interlocks during the factory acceptance test (FAT).
Set acceptance limits before testing. Separate workshop checks from site performance checks, which depend on installed utilities and actual feed. Request measured results with conditions; sample calculations alone cannot prove performance.
Spray Dryer Questions
Why does feed solids content matter?
It links feed rate to dry solids and water load. The same liquid feed rate can give different powder output when solids content changes.
Can a thick slurry be spray dried?
Possibly. Measure viscosity at the operating temperature and check settling. Pumping and atomization trials are needed before confirming fit.
Is feed rate the same as powder output?
No. Feed includes water. The sample table separates feed, powder and evaporation, with its assumptions shown below the values.
Is all powder recovered?
No fixed recovery is promised. Fine particles, wall deposits and collection design affect recovery. Agree a measurement method and target for the trial.
What about heat-sensitive materials?
Provide temperature limits and a way to measure product quality. Review air conditions and test the material before accepting a drying window.
What is needed for a useful quote?
Prepare the project data above, a scope boundary and available utilities. Use the local form to explore the workflow; it sends no enquiry.
Have Your Project Data Ready?
Try the local workflow with sample details.