Spray vacuum freeze crystal drying equipment

Abstract

This invention relates to a spray vacuum freeze-crystallization drying device. The main function of the drying system is to use a vacuum pump to create negative pressure inside the drying chamber and heat the chamber to a certain temperature. Liquid raw materials from a raw material container are sprayed into the drying chamber. Upon entering the drying chamber, the liquid raw materials' boiling point is lowered due to the vacuum environment, causing them to rapidly transform into freeze-crystallized substances. Combined with a drying air nozzle, hot air agitates the freeze-crystallized substances, creating a high-speed vortex that circulates within the drying chamber. Simultaneously, a heater further heats the freeze-crystallized substances, causing them to sublimate. This allows for rapid drying at the set temperature. This method not only avoids damaging the raw material's components and nutrients but also achieves a faster, more convenient, and better drying effect while effectively reducing costs, thus enhancing its overall practicality and usability.

Claims

1. A spray vacuum freeze-drying device, which mainly includes a drying system; wherein: The drying system mainly consists of a drying drum with a liquid nozzle at the top and a gas nozzle at the bottom. A raw material tank is connected to the liquid nozzle. A first valve connects the drying drum and the raw material tank. An electric heater is installed opposite the drying drum, with its inlet connected to a dryer. The heater is connected to both the gas nozzle and the top of the drying drum. A second valve connects the heater and the gas nozzle, and a third valve connects the heater and the top of the drying drum. At least one set of heaters is installed on the outside of the drying drum. A thermometer and a hygrometer are also installed opposite the drying drum to sense temperature. The temperature inside the drying drum and the humidity inside the drying drum are sensed by the hygrometer. A first collector is also connected to the upper end of the drying drum. A fourth valve is connected between the upper end of the drying drum and the first collector. The first collector is also connected to the bottom end of the drying drum. A fifth valve is connected between the bottom end of the drying drum and the first collector. A vacuum pump is connected to the rear end of the first collector. A condenser is connected between the vacuum pump and the first collector. The condenser is cooled by a chiller. A sixth valve is connected between the first collector and the condenser. A vacuum pump is also connected to the rear end of the first collector. A seventh valve is connected between the first collector and the vacuum pump.

2. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The vacuum pump evacuates the inside of the drying chamber to reduce the vacuum level inside the drying chamber to below -70 Pa.

3. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The liquid nozzle is a two-flow sprayer.

4. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The gas nozzle is a mechanical centrifugal disc.

5. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The raw material tank heats the liquid raw material it contains at a temperature of 35 to 45 degrees Celsius.

6. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The heater heats the inside of the drying drum at a temperature of 35 to 45 degrees Celsius.

7. The spray vacuum freeze-drying apparatus as described in claim 1 or 6, wherein, The heater is an infrared heater, which has a shell corresponding to the drying barrel. At least one infrared lamp is arranged inside the shell, and an outer cover is provided on the outside of the shell. The inner end face of the outer cover has a reflective surface, which can reflect the infrared rays emitted by the infrared lamp back to the drying barrel.

8. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, The first collector is a cyclone collection tower.

9. The spray vacuum freeze-drying apparatus as described in claim 8, wherein, The bottom of the first collector is connected to a first collection bucket via a first discharge valve, and a first vent valve is provided on the first collection bucket.

10. The spray vacuum freeze-drying apparatus as described in claim 1, wherein, A second collector is provided between the first collector and the sixth valve and the seventh valve. The second collector is a cyclone collection tower. The bottom of the second collector is connected to a second collection bucket via a second discharge valve, and a second vent valve is provided on the corresponding second collection bucket.

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