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Intermittent drying system and method of multifunctional fluidized bed for freezing, spraying and pelleting

A freezing spray and drying system technology, applied in the direction of drying solid materials, drying solid materials without heating, drying, etc., can solve the problems of limited functions, high investment cost, inflexible operation, etc., to reduce quality degradation, mixed distribution Uniform, widely applicable effect

Active Publication Date: 2012-05-23
SHANDONG TIANLI DRYING TECH & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the equipment for spray freeze-drying technology is separated in space: that is, the spray freeze stage and the normal pressure freeze-dry stage are completed in different drying chambers, such as the spray freeze-drying in the patent CN200820129701.5 (integrated spray freeze-drying) The equipment is integrated, and the drying chamber is divided into a "frozen particle storage chamber" and a "freezing chamber". Although continuous operation can be realized, a certain amount of frozen particles must be kept in the frozen particle storage chamber first. The cost, efficiency and time Compared with segmented intermittent operation, there is no obvious advantage
And the separation in space makes it difficult to transfer the frozen spray powder, which has a destructive effect on the mechanical strength or temperature rise of the frozen particles
[0006] And although the current spray freezing technology, normal pressure freeze drying and vacuum low temperature drying equipment have freeze spray fluidized bed drying combination CN200810195187.X (method and device thereof using low temperature dew point gas spray drying to make powder), the functions are still limited and the operation Inflexible, the function is too single for pharmaceutical, biological, food R&D centers and laboratories, and the investment cost is high

Method used

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  • Intermittent drying system and method of multifunctional fluidized bed for freezing, spraying and pelleting
  • Intermittent drying system and method of multifunctional fluidized bed for freezing, spraying and pelleting
  • Intermittent drying system and method of multifunctional fluidized bed for freezing, spraying and pelleting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] First method of the present invention is:

[0058] 1) Turn on the vacuum pump 7 to form the vacuum environment of the closed-loop system, and the vacuum degree is 0.01MPa. Then turn on the heat pump evaporator 1, heat pump compressor 2, heat pump throttle valve 3, heat pump condenser 4, fan and wind direction reversing device 5, and the cold air enters from the top of the drying chamber 12, reducing the overall temperature in the system to -50°C to -60°C; (The temperature can also be -53°C or -55°C or -58°C)

[0059] 2) Turn on the metering pump 8, use the atomizer 13 to atomize the solution into fine mist droplets, and the freezing medium around the atomizer: -50°C to -60°C (the temperature can also be -52°C or -54°C or - 58°C) low-temperature air or inert gas or one or more combinations of the following solvents: ethanol, toluene, methanol, n-butanol, tert-butanol, etc.; flow down with the mist droplets, and quickly freeze the mist droplets into fine particles Solid...

Embodiment 2

[0065] Second drying method of the present invention is:

[0066] 1) Turn on the heat pump evaporator 1, heat pump compressor 2, heat pump throttle valve 3, heat pump condenser 4, fan and wind direction reversing device 5, the cold air enters from the top of the drying chamber 12, and the overall temperature in the system is reduced to -50 °C to -60°C (the temperature can also be -53°C or -55°C or -58°C);

[0067] 2) Turn on the metering pump 8, use the atomizer 13 to atomize the solution into fine mist droplets, and the freezing medium around the atomizer: -50°C to -60°C (the temperature can also be -52°C or -54°C or - 58°C) low-temperature air or inert gas or organic solution (for example) flows down with the mist droplets, and the mist droplets are quickly frozen into fine solid particles, and the solid particles settle in the fluidization cylinder 11;

[0068] 3) After the set time (depending on the amount of material to be processed), when the solid particles in the flui...

Embodiment 3

[0073] The third drying method of the present invention is:

[0074] 1) The material to be dried is put into the fluidized cylinder 11 through the hand hole of the drying chamber 12, and the vacuum pump 7 is turned on to form a vacuum environment of a closed-loop system, and the vacuum degree is 0.01MPa. Then open electric heater 6, heat pump evaporator 1, heat pump compressor 2, heat pump throttle valve 3, heat pump condenser 4 and blower fan and wind direction reversing device 5;

[0075] 2) The low-temperature hot air of 60°C to 80°C (the temperature can also be 65°C or 70°C or 75°C) enters from the bottom of the drying chamber 12. When the low-temperature hot air passes through the wet material, it will take out the moisture in the material. Increase;

[0076] 3) When the hot air passes through the heat pump evaporator 1, the air is cooled to 0°C, the humid air reaches saturation, and the moisture in it condenses out to achieve the purpose of dehumidification, and then en...

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Abstract

The invention discloses intermittent drying system and method of a multifunctional fluidized bed for freezing, spraying and pelleting, which has the advantages of flexible structure, variety methods, low use cost and the like. The structure is characterized by comprising a refrigeration system and a fluidized bed drying system for spraying and freezing in vacuum, wherein a vacuum spraying drying system is connected with a feeding system, the refrigeration system is connected with the feeding end of the vacuum spraying drying system, the other path of pipeline of the refrigeration pipeline is connected with a fluidized device of the vacuum spraying drying system through a pulse adjusting device to form a closed ring system, thereby flexible switch among different drying methods can be realized, and intermittent operation is carried out. The invention is mainly used for dewatering storage of products with high additional value, such as liquid foods, medicines, biological products and the like and development operation of new techniques of dewatering products such as liquid foods, medicines and biological products.

Description

technical field [0001] The invention relates to a freeze-spray granulation fluidized bed multifunctional intermittent drying system and method, which belongs to the technical field of process equipment and is mainly used for dehydration preservation of food, medicine, biological products, micro-nano powder and the like. technical background [0002] Spray freezing technology uses an atomization device to quickly freeze liquid raw materials into fine particles by a low-temperature freezing medium. Because the freezing time is usually a few seconds and the speed is fast, small-sized ice crystals are formed, which can reduce the impact on cells and other functions of biological products. The destruction of the structure can quickly form a stable solid-state structure, ensure the microscopic pore structure of the original product, and preserve the physical and chemical properties of the original product to the greatest extent. [0003] Atmospheric freeze-drying operates under no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B5/06
Inventor 李胜苏伟光李祥宇傅宪辉周孟崔峰
Owner SHANDONG TIANLI DRYING TECH & EQUIP
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