A blueberry drying machine is industrial batch drying equipment that removes moisture from fresh blueberries while preserving color, anthocyanins, and flavor. The machine featured on this page is Shuliy’s heat pump drying room, a sealed box-type dryer that uses forced hot-air circulation and precise temperature control to process berries on stainless steel trays. Depending on the model, it handles 300 to 8,000 kg of fresh blueberries per batch, lowering moisture from over 80% to a stable 12–15%.
Compared with sun drying or basic electric ovens, this blueberry dryer solves the biggest problem in berry dehydration: the natural wax layer on blueberry skin. Without controlled temperature and humidity, the surface seals too fast, trapping moisture inside. Shuliy’s staged blueberry drying temperature curve — 45°C → 55°C → 60–65°C — dries the berries gently, prevents case hardening, and keeps the final product bright purple and export-ready.
Shuliy has manufactured food drying equipment for over 20 years and exports to 30+ countries. Every machine is backed by installation support, operator training, and a one-year warranty with lifetime technical assistance.
Drying room YouTube video
Technical Parameters of the Heat Pump Blueberry Drying Machine
| Model | Dimensions (mm) | Drying Crews | Trays | Capacity per Batch (kg) | Heat Source |
|---|---|---|---|---|---|
| SL-2 | 4000 × 1860 × 2500 | 2 | 48 | 300–600 | Heat pump / Electric / Coal / Hybrid |
| SL-4 | 6000 × 1860 × 2500 | 4 | 96 | 500–1000 | Heat pump / Electric / Coal / Hybrid |
| SL-6 | 7200 × 2300 × 2500 | 6 | 144 | 800–1500 | Heat pump / Electric / Coal / Hybrid |
| SL-8 | 8500 × 2300 × 2500 | 8 | 192 | 1000–2000 | Heat pump / Electric / Coal / Hybrid |
| SL-10 | 10000 × 2300 × 2500 | 10 | 240 | 1200–2500 | Heat pump / Electric / Coal / Hybrid |
| SL-12 | 8500 × 3300 × 2500 | 12 | 288 | 2500–4000 | Heat pump / Electric / Coal / Hybrid |
| SL-18 | 8500 × 5000 × 2500 | 18 | 432 | 4000–6500 | Heat pump / Electric / Coal / Hybrid |
| SL-24 | 12000 × 5000 × 2500 | 24 | 576 | 5000–8000 | Heat pump / Electric / Coal / Hybrid |
Voltage, tray size, trolley spacing, and control language can be customized for local standards.
Key Features of the Blueberry Drying Machine
Sealed Stainless Steel Chamber
The chamber and trays use 304 stainless steel. This protects berries from contamination, meets food-hygiene standards, and allows fast cleaning between batches.
Precise Blueberry Drying Temperature Control
A PLC controller manages temperature, humidity, and drying time automatically. The system follows the optimal curve for blueberries and stops or alarms when the target moisture is reached.
Forced Hot-Air Circulation
High-power circulating fans distribute heated air evenly across every tray layer. Top, middle, and bottom trays dry at the same rate.
Energy-Efficient Heat Pump
The air-source heat pump produces 3–6 kW of heat per 1 kW of electricity, cutting energy costs by 30–50% compared with pure electric heating.
Flexible Batch Size
Start with an SL-2 or SL-4 unit for small production, or choose SL-18/SL-24 for industrial-scale output up to 8 tons per batch.
Compact Footprint & Quick Installation
The box-type structure needs no complex civil works. Most models arrive pre-assembled and can be installed within one to two days.
Applications
This industrial blueberry dryer is suitable for:
- Fresh blueberries
- Blueberries, strawberries, raspberries, blackberries
- Cranberries, mulberries, and other small berries
- Sliced apples, pears, and peaches
- Medicinal herbs and flowers
One machine can process multiple products by changing the temperature and humidity curve.
Working Principle
- Loading: Pre-treated blueberries are spread in a single layer on stainless steel trays.
- Heating: The heat pump or other heat source warms air inside the sealed chamber.
- Circulation: Circulating fans push hot air through the trays, evaporating moisture from the berries.
- Dehumidification: A humidity-controlled exhaust fan removes moist air while fresh dry air enters.
- Cooling & Packaging: Once the target moisture is reached, berries cool inside the chamber before sorting and packing.
Blueberry Drying Temperature Curve
The correct blueberry drying temperature is the key to premium quality. Blueberries have a waxy skin that must be dried slowly at first.
| Stage | Temperature | Duration | Humidity | Purpose |
|---|---|---|---|---|
| Pre-drying | 45°C | 8 hours | 60–65% | Remove surface water without sealing the skin |
| Main drying | 55°C | 6 hours | 45–50% | Move internal moisture to the surface |
| Final drying | 60–65°C | 4 hours | ≤30% | Remove bound water, reach 12–15% moisture |
| Total | — | 18–20 hours | — | — |
The temperature must never exceed 68°C. Higher temperatures cause darkening, anthocyanin loss, and sugar caramelization.
Pre-Treatment Steps
- Sort and remove damaged or unripe berries.
- Wash gently.
- Pierce the wax skin — essential for even drying.
- Drain surface water thoroughly.
- Spread in a single layer on trays.
- Cool for 1–2 hours after drying, then pack.
Customer Pain Points & Solutions
| Pain Point | Shuliy Solution | Result |
|---|---|---|
| Blueberries darken during drying | Staged 45–65°C drying curve | Bright purple color, high anthocyanin retention |
| Uneven moisture inside berries | Forced circulation + single-layer trays | Consistent 12–15% final moisture |
| High electricity cost | Air-source heat pump | 30–50% energy savings |
| Weather-dependent production | Sealed indoor drying room | Year-round operation |
| Mold and spoilage | PLC humidity control | Longer shelf life |
Continuous Mesh Belt Dryer for Large-Scale Blueberry Production
For processors needing higher throughput, Shuliy also offers a continuous mesh belt dryer. This machine feeds and discharges automatically and handles 400 to 14,000 kg/h.
Belt Dryer Technical Parameters
| Model | Belt Width | Drying Length | Layers | Capacity (kg/h) | Total Power (kW) |
|---|---|---|---|---|---|
| SL-1.2-8 | 1.2 m | 8 m | 4 | 60–160 | 11.4 |
| SL-1.6-10 | 1.6 m | 10 m | 5 | 95–250 | 13.6 |
| SL-2-10 | 2 m | 10 m | 5 | 120–300 | 15.8 |
| SL-2-20 | 2 m | 20 m | 10 | 240–600 | 36.8 |
Continuous Dryer Temperature Zones
| Zone | Temperature | Function |
|---|---|---|
| Zone 1 | 45–50°C | Preheat and surface dehydration |
| Zone 2 | 60–65°C | Main dehydration |
| Zone 3 | 58–62°C | Deep drying |
| Zone 4 | 45–50°C | Cooling and moisture balance |
Total drying time is 3–4 hours. This option is best for mass-market products where speed matters more than premium color.
Case Example: Blueberry Drying Project
A food processing company in South America installed an SL-6 heat pump drying room for blueberry production. The customer previously lost 15–20% of harvest to rain and mold during sun drying.
After switching to Shuliy’s blueberry drying machine, the company achieved:
- Stable 12–15% final moisture
- Bright, uniform berry color
- 30% lower energy cost with heat pump operation
- All-weather production regardless of rain
The machine paid back its investment within the first processing season.
Why Choose Shuliy?
- 20+ years of drying equipment manufacturing experience
- Exported to 30+ countries
- ISO, CE, SGS, TUV certifications
- Food-grade 304 stainless steel construction
- Multiple heat sources: heat pump, electric, gas, coal, steam
- Custom voltage, tray size, and control language
- 1-year warranty and lifetime technical support
Frequently Asked Questions
Is the voltage customizable for my country?
Yes. We support 220V, 380V, 415V, and other standards.
What is the typical payback period?
Most customers recover the machine cost within 12–24 months through reduced spoilage and energy savings.
Can I dry other berries in the same machine?
Yes. The same drying room handles strawberries, raspberries, cranberries, and more by adjusting the temperature curve.
Do you provide installation support?
Yes. We supply manuals, videos, and online support. On-site engineer service is available.
What spare parts should I keep in stock?
Fan belts, heating elements, temperature sensors, and burner nozzles.
How is the heat pump more efficient than electric heating?
It transfers ambient heat into the chamber, producing 3–6 kW of heat per 1 kW of electricity.
Can I run a test before buying?
Yes. We can provide test drying records and videos from our facility.
Get a Quote for Your Blueberry Drying Machine
Whether you need a 300 kg heat pump drying room or an 8,000 kg industrial line, Shuliy can configure the right blueberry drying machine for your capacity, energy source, and quality target.
Contact us today for a free quotation and blueberry drying temperature curve design.
