Vacuum dryer SD-DW

spraydry aircontinuous

Product overview
The SD-DW Series dry-wind low-temperature spray dryer is designed for converting heat-sensitive and biological feeds into powder form, including bacteriophage microcapsules, proteins, enzymes, yeast, lactitol, mannitol, graphene-modified solutions, traditional medicine extracts and similar materials.

Working Principle
The feed solution is atomized into fine droplets and exposed to a controlled low-temperature dry-air (dry-wind) environment, enabling rapid solvent evaporation and powder formation while minimizing thermal impact on sensitive components.

COMPARATION
Dry method | Freeze Dryer | Dry Wind Spray Dryer
Drying mechanism | Vacuum sublimation | Dew point difference
Drying environment | Vacuum | Normal pressure
Drying temperature | < -20ºC | 35ºC-60ºC
Vacuum sublimation state | Solution state | Solution atomization state
Evaporation surface area | Small | Large
Drying efficiency | Poor, generally >24 hours | High, generally about 3 seconds
Powder state | Block | Powdered
Accumulation thickness | Required, generally cannot exceed 10mm; thicker layers increase drying time and reduce efficiency | None
Conjunctival phenomenon | Surface may develop crusts that hinder sublimation | No conjunctival phenomenon
Influence on materials | Long drying time can affect biological stability | Short drying time, relatively small impact on biological stability

Safety parameters

• Equipment noise at operator distance (<1 m) is below 75 dB during operation.
• Dangerous parts are marked with clear warning signs.
• Design complies with applicable equipment safety design specifications.

Dried sample (example)
Photographs and sample powders produced by the SD-DW Series demonstrate fine, free-flowing powders obtained from heat-sensitive feeds using the dry-wind spray drying method.

Basic parameters

• Feed rate: 50–2000 ml/h (model dependent).
• Product-contact materials: 316L stainless steel; non-product-contact structural parts: 304 stainless steel.
• Exterior can be wiped and disinfected with 75% ethanol and 0.2% chlorhexidine; resistant to common air disinfectants (chlorine-based disinfectants, formaldehyde, ozone, hydrogen peroxide, acetic acid).
• Process monitoring and records: time, pressure, temperature, flow, alarms and program runs — capable of online display and printing.
• Monitoring interface displays equipment status (preparation, operation, shutdown), process program, operational data (temperature, pressure, air volume), pipeline/valve status, feed pump status and atomizer open/close status.
• Feeding system: peristaltic pump (Lange) with Lange feed tubing supplied.
• Atomization/drying system: atomizer, air compressor, pressure regulating valve, drying tower, observation window, etc.
• Inlet temperature sensor range: 0–250ºC.
• Exhaust temperature sensor range: 0–150ºC.
• Product recovery: cyclone separation, collection vessel (316L stainless steel or glass), collection valve.
• Electrical control: PLC control (Xinjie) with Schneider auxiliary electrical components.
• Includes cyclone collector.
• Exhaust dust collection: high-temperature-resistant bag filter or suitable dust collector.
• Supporting equipment (if any): dew point meter (e.g. Michell), air compressor, cold-water circulation unit. Auxiliary equipment should be provided by purchaser when specified; installation site must provide civil water and electrical services.
• Design measures to prevent static electricity and minimize powder/dust escape to the environment.
• Discharge collection valve: clamp-type quick connection.

CONFIGURATION
Name | Brand / Material
Drying tower | SUS316L
Cyclone separation | SUS316L
Receiving barrel | SUS316L
Cyclone collector | SUS316L
Atomizer | U.S. spraying system
Air compressor | Taiwan Dolphin
Regulating valve | Fang Wei
Exhaust dust collector | Wan Chuang
Bag dust collector | Li Xiang
Temperature sensors (intake & exhaust) | Shanghai Jia Min
Power supply | Taiwan Mean Well
Electronic control auxiliary system | Schneider
Electric control system (PLC) | Xinjie
Connecting clamp | Gui Yong Brand
Relay | Schneider
Display screen | LG
Blower | Taiwan Dagang
Peristaltic pump | Lange
Peristaltic feed tubing | Lange
Heating core | Hongde
Dry air system (two-stage) | LABSPRAY™
Dew point meter (supporting) | Michell
Chilling water circulation unit | Comson
Exhaust dust collector system (model) | LABSPRAY™
Automatic dehumidification / switching / humidity detector / leakage protection / overvoltage stabilization / temperature curve memory functions | LABSPRAY™

Caractéristiques / spécifications techniques

• Series: SD-DW Series (dry-wind low-temperature spray dryer for heat-sensitive materials).
• Typical feed range: 50–2000 ml/h (adjustable by model/specification).
• Product-contact materials: 316L stainless steel; structural materials: 304 stainless steel.
• Recovery: cyclone collector plus optional collection barrel or cup (316L or glass).
• Sensors: inlet 0–250ºC, outlet 0–150ºC; process parameters logged and printable.
• Control: PLC-based control with Schneider auxiliary components and LG display; temperature curve memory function available.
• Atomization: high-quality U.S. atomizer and dedicated air compressor; atomizer and feed pump status visible on monitoring dashboard.
• Dust/exhaust handling: high-temperature-resistant bag filter or specified dust collector; exhaust dust collector and cyclone separation for product recovery.
• Anti-static and containment design to minimize dust escape and static risk.
• Disinfection compatibility: exterior resistant to common disinfectants and compatible with standard air disinfection methods.
• Auxiliary/supporting equipment: dew point meter, air compressor, cold water circulation unit (as required).
• Electrical protections: leakage protection, overvoltage stabilization, automatic switching and safety alarms.