On December 27, 2018, the stage of the Shanghai Jiaotong University speech seminar mentioned the Shanghai Qiaofeng cryogenic spray dryer:
1. Low temperature spray dryer technology and process
Low-temperature spray dryer (QFN-PWDW series spray dryer can achieve the range of 35 degrees to 100 degrees) can achieve continuous 35°C low-temperature spray dryer with high recovery rate and retain material activity. Can be customized into a high and low temperature integrated spray dryer (QFN-PWGD) series high and low temperature spray dryer can achieve the range of 35 degrees to 220 degrees), all can be spray dried. Typical materials: low-temperature equipment such as protease, camel milk, enzyme preparations, plant extracts, etc. are carefully manufactured by our company for heat-sensitive materials, which can maintain the activity of the original materials, such as polymers, microorganisms, sugar-containing materials, etc.) according to user requirements Customized high and low temperature integrated machine, which can be used in low temperature or high temperature test, and multi-purpose integrated equipment.
2. The principle of low temperature spray dryer:
1. Solve the problem of material resurgence
2. The minimum processing volume is 50ml/hour;
3. Inlet air temperature: 35-140°C (if QFN-GD series is selected, inlet air temperature: 35-220°C large section drying);
4. Can be upgraded to high and low temperature integrated spray dryer;
Low-temperature spray dryer and it is mainly suitable for universities, research institutes and food, medicine, chemical industry, enterprises, laboratories to produce micro-particle powder, has broad-spectrum applicability to solutions such as emulsions and suspensions, and is suitable for heat sensitivity Drying of substances such as biological products, biological pesticides, enzyme preparations, etc., because the sprayed materials are only exposed to the drying air system when sprayed into mist-like droplets, so they are only heated instantly, which can keep these active materials after drying. It still maintains its active ingredients from damage. This type of spray dryer can achieve both low-temperature atomization drying and high-low temperature atomization drying dual-purpose models for spray drying at room temperature.
3. Introduction to the device system of low-temperature spray dryer:
●Adopt P.I.D temperature control system.
●Motor reverse phase and overload protection function.
●Simple and compact structure, convenient maintenance and extremely low failure rate.
●The appearance of the whole machine is stainless steel, which is bright and generous.
●Color LCD touch screen parameter display: air inlet temperature / air outlet temperature / peristaltic pump speed / air volume / needle frequency.
●Qiao Feng's innovative drying air system can achieve low temperature drying
●Fully automatic control: One-button startup, after setting the spray process parameters, the temperature reaches the predetermined temperature, the peristaltic pump starts automatically, the operation animation is displayed on the touch screen, and the operation process is clearly displayed; just press the stop button when shutting down, and the machine will automatically and safely shut down .
●Manual control: If you need to adjust the process parameters during the experiment, you can easily switch to the manual state to set the parameters.
●Equipped with nozzle cleaner (through needle), when the nozzle is blocked, it will automatically clear, and the frequency of the needle can be automatically adjusted.
●Shutdown protection function: just press the stop button when shutting down, the machine will stop running immediately except for the fan, to ensure that the equipment will not burn out the heating part due to misoperation (forcibly turning off the fan).
●The spray, drying and collection system is made of high-quality stainless steel materials, so that the drying process can be carried out in a pollution-free environment.
●Built-in imported oil-free air compressor, the particle diameter of the powder is distributed normally, the fluidity is very good, the noise is very low, less than 60db.
●The atomization structure of the two-fluid spray, the whole machine is made of high-quality stainless steel, and the design is compact, without auxiliary equipment.
●The design of drying temperature control adopts real-time regulation PID constant temperature control technology to make the temperature control of the whole temperature zone accurate, and the heating temperature control accuracy is ±1℃.
●The feed volume can be adjusted by the feed peristaltic pump, and the minimum sample volume can reach 50ml.
●After drying, the finished dry powder has a relatively uniform particle size, and more than 95% of the dry powder is in the same particle size range.
●For viscous materials, there is a nozzle cleaner (through needle), when the nozzle is blocked, it will be automatically cleared, and the frequency of the needle can be automatically adjusted.
Four, cooling system technical parameters
1. The latest design microcomputer precision constant temperature control system
2. Well-designed and thoughtful refrigeration system, high refrigeration efficiency, fast cooling, low noise, low vibration, compressor cascade refrigeration system and heat exchange system to ensure reliable operation and rapid cooling of the instrument
3. Humanized design: Two-sided foldable handles are convenient for moving the instrument, and heavy-duty self-locking casters are used for easy movement.
4. The low-temperature tank adopts advanced overall foaming technology, which has good heat insulation performance and effectively reduces the loss of cold energy
5. The professional circulation design ensures the good horizontal and vertical uniformity of the liquid in the tank, the temperature fluctuation is ±0.05°C, and the display resolution is 0.1°C
6. The inner tank and box body are made of high-quality stainless steel materials combined with the dry air system to effectively reduce the dry air temperature
