Qiaofeng's low-temperature spray dryer (QFN-PWDW series spray dryer can achieve temperatures ranging from 35°C to 100°C) enables continuous low-temperature spray drying at 35°C, with high recovery rate and preservation of material activity. It can be customized into a high-low temperature integrated spray dryer (QFN-PWGD series, achieving temperatures ranging from 35°C to 220°C), both capable of spray drying. Typical materials: semaglutide, amino acids, peptides, proteases, camel milk, enzyme preparations, plant extracts, etc. Low-temperature equipment is specifically developed by our company for heat-sensitive materials, preserving the activity of original materials such as polymers, microorganisms, sugar-containing materials, etc. It can be customized according to user requirements into a high-low temperature integrated machine, suitable for both low-temperature and high-temperature experiments, serving as a multifunctional integrated device.

Experimental low-temperature spray dryer; 
1. Solve the problem of material moisture reabsorption
2. Sample processing capacity: 50ml/hour;
3. Inlet air temperature: 35-140°C (if QFN-GD series is selected, inlet air temperature: 35-220°C for wide-range drying);
4. Upgradable to a high-low temperature integrated spray dryer;

The low-temperature spray dryer is mainly suitable for universities, research institutes, and enterprises in food, pharmaceutical, chemical, and laboratory settings for producing微量颗粒 powders. It has broad applicability to solutions such as emulsions and suspensions, and is suitable for drying heat-sensitive materials like biological products, biological pesticides, and enzyme preparations. Since the sprayed material is only exposed to the drying air system when atomized into fine droplets, it is rapidly heated, preserving the active components of these materials without damage after drying. This spray dryer can achieve low-temperature atomization drying at room temperature and dual-purpose high-low temperature atomization drying.

● Adopts P.I.D temperature control system.
● Motor phase reversal and overload protection functions.
● Simple and compact structure, easy maintenance, extremely low failure rate.
● Entire unit made of stainless steel, elegant and generous appearance.
● Color LCD touch screen parameter display: inlet temperature / outlet temperature / peristaltic pump speed / air volume / needle frequency.
● Qiaofeng innovative drying air system enables low-temperature drying.
● Fully automatic control: one-key startup; after setting spray process parameters, the peristaltic pump starts automatically when the temperature reaches the preset value; the touch screen displays operation animation, and the process flow is clearly shown; for shutdown, simply press the stop button, and the machine shuts down safely and automatically.
● Manual control: if process parameters need to be adjusted during the experiment, it can be conveniently switched to manual mode for parameter setting.
● Equipped with a nozzle cleaner (needle); when the nozzle is blocked, it will be automatically cleared, and the needle frequency can be adjusted automatically.
● Shutdown protection function: when shutting down, simply press the stop button; the machine stops immediately except for the fan, ensuring that the heating part will not be damaged due to incorrect operation (forcibly turning off the fan).
● The spray, drying, and collection systems are made of stainless steel, ensuring the drying process is carried out in a pollution-free environment.
● Built-in imported oil-free air compressor; the particle size distribution of the powder is normal, with excellent flowability and very low noise, less than 60db.
● Two-fluid spray atomization structure; the entire unit is made of stainless steel, compact design, no auxiliary equipment required.
● The drying temperature control design adopts real-time PID constant temperature control technology, ensuring accurate temperature control across the entire temperature range, with heating control accuracy of ±1°C.
● Feed rate can be adjusted via the feed peristaltic pump, with a sample volume of up to 50ml.
● The dried finished powder has relatively uniform particle size, with over 95% of the powder within the same particle size range.
● For viscous materials, a nozzle cleaner (needle) is provided; when the nozzle is blocked, it will be automatically cleared, and the needle frequency can be adjusted automatically.

Cooling system technical parameters 
Designed with a microcomputer precision constant temperature control system
Carefully designed refrigeration system with high cooling efficiency, fast cooling, low noise, and low vibration; the compressor cascade refrigeration system and heat exchange system ensure reliable operation and rapid cooling of the instrument
Humanized design: foldable handles on both sides for easy movement; heavy-duty self-locking casters for convenient relocation.
The low-temperature tank adopts an integral foaming process, providing good thermal insulation and effectively reducing cold loss.
Professional circulation design ensures good horizontal and vertical uniformity of the liquid in the tank, with temperature fluctuation of ±0.05°C and display resolution of 0.1°C.
The inner tank and housing are made of high-quality stainless steel, combined with the dry air system to effectively reduce the dry air temperature.

Advantages of low-temperature spray dryer: 
Comparison with other types of drying equipment:

Note 1: Moisture evaporation rate is based on an inlet air temperature of 80°C.