Equipment and method for carrying out spray freezing and drying on inert particles

Abstract

The invention relates to equipment for carrying out spray freezing and drying on inert particles, comprising a fluidizing system, an atomizing system, a freezing system and a heat exchange system, wherein the heat exchange system is connected to the fluidizing system by virtue of a gas pipeline. The invention also relates to a method for carrying out spray freezing and drying on the inert particles, comprising the following steps of: (1) adding an inert particle group; (2) introducing a refrigerant; (3) introducing low-temperature low-humidity fluidizing gas; (4) freezing and spray coating; (5) freezing and drying; and (6) separating powder. The equipment and process for carrying out spray freezing and drying on inert particles in the invention couple processes such as fluidizing, cold spray coating, drying and separating, thus atomizing, freezing, drying and separating can be completed in one equipment, enclosed action and continuous operation are realized, no pollution is produced to the environment, dried feed liquid foods and medicines can be dried into powder finished products in one step, and no secondary processing is required; and besides, the structure is simple, the operation is convenient, and the manufacturing cost of equipment is reduced.

Description

technical field [0001] The invention belongs to the technical field of drying, in particular to an inert particle spray freeze-drying equipment and method. Background technique [0002] At present, for the preparation of high value-added food and pharmaceuticals, in order not to destroy the active ingredients in them, to obtain products with high specific surface area, good porosity and stable performance, the preparation of spray freeze drying (Spray-Freeze Drying, SFD) is mainly used. method. The spray freeze-drying method is to atomize the liquid material, and produce frozen particles after contacting with a cold medium (such as liquid nitrogen, cold air flow, supercooled plate, etc.), and then dehydrate and dry it into a powder. Spray freeze-drying technology has the following advantages: (1) The low temperature process is suitable for the preparation of heat-sensitive materials; (2) The atomization process and freezing process can produce spherical particles of control...

AI Technical Summary

Problems solved by technology

This kind of normal pressure spray freezing fluidized bed drying method, although its normal pressure treatment process is relatively easy to operate, but it needs to deal with a large amount of gas, which increases the load on the condenser; moreover, the material needs to be transferred from the cold room to the fluidized bed, Process continuity is poor; in addition, for powders with small particle size (<60um), conventional fluidization is quite difficult

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