| 摘要 |
FIELD: food industry.SUBSTANCE: one first performs the sections preliminary vacuum treatment using an ejector vacuum pump till residual pressure is equal to 610 Pa, then one cools the external surface of the profile drum acting as the desublimator with electric current supplied onto the groups of thermoelectric modules placed on the internal surface of the profile drum which creates the required temperature gradient for vapours movement to the desublimator surface; then one supplies heat energy to the product using heaters, as a result moisture evaporation takes place at a residual pressure lower than 610 Pa; part of the moisture evaporated from the product is removed from the chamber via the ejector vacuum pump, the other part is adsorbed by the desublimator surface represented by a nanomaterial layer; release of evaporated moisture molecules takes place after the desublimator turning due to the thermoelectric modules connection polarity changing. In the vacuum-and-sublimation drier using nanomaterials and thermoelectric modules, including a drying chamber consisting of sections equipped with a nipple with a locking valve installed with the possibility to connect to a vacuum pump, the vacuum pump, the desublimator placed between the sections and a heater. The drying chamber is made of two sealed sections connected to the vacuum pump and separated with a plate wherein a profile drum representing the desublimator is horizontally installed so that to enable rotation; a nanomaterial layer is applied onto the drum external surface while independent groups of thermoelectric modules are installed on the internal surface.EFFECT: evaporated moisture vapours capture effectiveness is enhanced; desublimation surface regeneration is ensured during the drier operation in a continuous mode; workload onto the vacuum pump is reduced due to depressurisation in the vacuum-and-sublimation chamber.2 cl, 1 dwg |
