Spray freezing tower system

Abstract

The invention discloses a spray freezing tower system which comprises a spray tower, an atomization air pipe, an air curtain air pipe, an air blowing pipe, a material turnover box and a temperature control system, and the spray tower is provided with a freezing cavity. The spray tower comprises a heat exchange tube layer surrounding the freezing cavity and is used for circulating a heat exchange working medium to enable the freezing cavity to be at the freezing temperature, and atomized materials can be frozen. Materials are not in direct contact with a refrigerating medium and are prevented from being polluted. And a recyclable heat exchange working medium is adopted, so that the operation cost of the spray freezing tower system is greatly reduced. The air curtain can reduce the phenomenon that materials adhere to the wall in the freezing process, and the yield is increased. The whole system can realize automatic control through an integrated control system, has online cleaning and online sterilization functions, and can realize accurate temperature control of -100 DEG C to +100 DEG C. According to the spray cooling tower system, low-temperature freezing of materials can be achieved, high yield can be achieved, large-batch production of frozen and dried materials can be achieved in combination with a fluidized bed system, and the efficiency is far higher than that of a freezedryer.

Description

technical field [0001] The present disclosure relates to the technical field of spray freezing equipment, in particular to a large-scale production type spray freezing tower system. Background technique [0002] The spray freezing tower can atomize the material, and the atomized fine droplets freeze quickly at low temperature to form ice balls, which will not affect heat-sensitive substances. The pucks can form porous or nonporous microspheres after drying. The current spray freezing technology has the following problems: [0003] First, when the atomized liquid droplets are in direct contact with a cooling medium (such as liquid nitrogen, etc.), bumping will occur, resulting in changes in the morphology and performance of the microspheres, and the cooling medium will contaminate the material. [0004] Second, the material tends to stick to the tower wall during the pelletizing process, resulting in low yield and difficult cleaning of the spray freezing tower. [0005] Th...

AI Technical Summary

Problems solved by technology

[0003] First, when the atomized liquid droplets are in direct contact with the cooling medium (such as: liquid nitrogen, etc.), bumping will occur, resulting in changes in the shape and performance of the microspheres, and the cooling medium will contaminate the material

[0004] Second, the material tends to stick to the tower wall during the pelletizing process, resulting in low yield and difficult cleaning of the spray freezing tower

[0005] Third, the liquid droplets cannot be stored for a long time after being formed into balls, and the microspheres are easy to absorb water when in contact with the air, which makes the microspheres very easy to melt

And the ice ball is easy to melt during the transfer process, resulting in changes in shape

[0006] Fourth, the use of liquid nitrogen and other refrigerants has poor safety and poses certain safety hazards to operators

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