MODE OF DEFINITION OF ADMISSIBLE TEMPERATURE REGIMES OF DRYING DISPERSED THERMAL LABILITY PRODUCTS IN CONDITIONS OF STEPPED CHANGING OF THE TEMPERATURE OF THE DRYING AGENT Russian patent published in 2008 - IPC F26B3/00 

FIELD: the invention refers to the methods of definition of admissible temperature regimes of drying dispersed thermal lability products in the conditions of multi-stage changing of the temperature of the drying agent at the input into the apparatus and may be used for development of the technology of drying products in food and other fields of industry.

SUBSTANCE: the mode envisages drying of several samples of dispersed material, definition of maximal temperature and duration of heating of the product by an experimental way at conducting repeated tests, according to whose results they define duration of heating of the product, carrying out drying of each sample at constant temperature of the drying agent, drying of each following sample at more high temperature, definition at the same time of maximal duration of drying during which the qualitative indicators of the product remain in the limits of the standards, then building on the basis of the received data of charts of dependence of the logarithm of making the absolute temperature of the drying agent at maximal duration of processing of the product with this agent from opposite meaning of the absolute temperature of the drying agent in the shape of functional connection or in the shape of functional connection: where τ_max -maximal duration of processing the product with the drying agent at the temperature T_d during which its qualitative indicators remain in the limits of the corresponding standards: a, b, c, d-empirical coefficients for this product, and definition according to these charts of the field of admissible temperature regimes, new is that in the conditions when at each stage the product is processed with the drying agent at the given temperature installed for this stage the field of admissible temperature regimes is defined in such a manner that duration of the processing of the product at this stage at the given temperature be lower them maximally admissible duration of processing the product at this temperature, and the total duration of processing of the product on all stages must be defined from the conditions of functional connection: where Δτ_i -duration of processing of the product with the drying agent on i-stage at the temperature T_i; _{- maximal duration of processing of the product with the drying agent at temperature Ti which is defined from functional correction (1) or (2); τtot- total duration of processing of the product on all stages of the process.}

EFFECT: the mode allows define the field of admissible temperature regimes of dispersed thermal unstable material in conditions of multi-staged regime of drying and preserve the quality of the product in the limits installed with the corresponding standards.

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