Drying device and method for vacuum pulsation cold-drying Chinese wolfberries

Abstract

The invention belongs to the technical field of fruit and vegetable processing, and particularly relates to a drying device and method for vacuum pulsation cold-drying fresh-keeping Chinese wolfberries. The drying device comprises a drying machine body, the interior of the drying machine body is divided into a refrigerating chamber and a drying chamber, and the refrigerating chamber and the dryingchamber are separated through a partition plate; and at least one cold trap is arranged in the refrigerating chamber, at least one plate layer is arranged in the drying chamber, and the drying chamber is in communication with an air source through a pipeline. The process comprises the steps of vacuum pulsation drying, vacuum cold drying and the like. The method and the device are mainly used fordrying the fresh Chinese wolfberries, so that the color, plumpness, wax layer integrity, nutritional ingredients, taste and other overall quality of the Chinese wolfberries are remarkably improved.

Description

technical field

[0001] The invention belongs to the technical field of fruit and vegetable processing, and in particular relates to a drying device and method for vacuum pulsation cold-drying wolfberry. Background technique

[0002] Lycium barbarum, a plant belonging to the Solanaceae family, is a medicinal and edible food, which has the effects of nourishing the liver and kidney, improving energy and improving eyesight. Dried wolfberry can greatly prolong its storage time, and the drying technology of wolfberry is very important for the medicinal and edible effects of dried wolfberry.

[0003] Natural drying is one of the common methods of drying wolfberry. The process is simple and the cost is low, but it is easily affected by the weather and the quality is different. In addition, common techniques for drying wolfberry include hot air drying, vacuum pulse drying, and freeze drying, but there are still many deficiencies. Atmospheric pressure hot air drying technology requ...

Examples

Embodiment 1

[0097] Example 1 A process for drying wolfberry with a vacuum pulsation cold-drying device, using the device of the present application, comprising the following steps:

[0098] (1) Preheating

[0099] Lycium barbarum fresh fruit is placed in the drying chamber 2, and the temperature of the plate layer 6 of the drying chamber 2 is set;

[0100] Wherein, the temperature of the plate layer 6 is 55°C.

[0101] (2) Vacuum pulsation

[0102] Open the partition plate 4, evacuate the water ring pump 8, evacuate the Roots pump 7, and cold trap 5, and set the range of pulsating vacuum;

[0103] When the lower limit of pulsating vacuum is reached, turn off the evacuation Roots pump 7 and the evacuation water ring pump 8 in sequence, turn on the maintenance water ring pump 10 and maintenance Roots pump 9, and set the maintenance time one;

[0104] Reach maintenance time one, open dehumidifier 14, heater two 15, intake valve 13 and carry out aeration;

[0105] When the upper limit o...

Embodiment 2

[0114] With embodiment 1, the difference is that,

[0115] In step (1), the temperature of the plate layer 6 is 50°C.

[0116] In step (2), the temperature of the cold trap 5 is-45°C; the maintenance time one is 15min, and the maintenance time two is 5min; the number of vacuum pulses is 20 times, and the gas used during aeration is clean nitrogen; The temperature is 45°C, and the relative humidity is ≤45%RH.

[0117]In step (3), vacuum freeze-drying is carried out in stages, and the vacuum degree of vacuum freeze-drying is 400 Pa; when drying, the temperature of the plate layer is 55° C., and the drying time is 5 hours.

Embodiment 3

[0119] With embodiment 1, the difference is that,

[0120] In step (1), the temperature of the plate layer 6 is 60°C.

[0121] In step (2), the temperature of the cold trap 5 is-25°C; the maintenance time one is 18min, and the maintenance time two is 8min; the number of vacuum pulses is 15 times, and the gas used during aeration is clean air; The temperature is 40°C, and the relative humidity is ≤45%RH.

[0122] In step (3), vacuum freeze-drying is carried out in stages, and the vacuum degree of vacuum freeze-drying is 50 Pa; when drying, the temperature of the plate layer is 55° C., and the drying time is 4 hours.

technical field

[0001] The invention belongs to the technical field of fruit and vegetable processing, and in particular relates to a drying device and method for vacuum pulsation cold-drying wolfberry. Background technique

[0002] Lycium barbarum, a plant belonging to the Solanaceae family, is a medicinal and edible food, which has the effects of nourishing the liver and kidney, improving energy and improving eyesight. Dried wolfberry can greatly prolong its storage time, and the drying technology of wolfberry is very important for the medicinal and edible effects of dried wolfberry.

[0003] Natural drying is one of the common methods of drying wolfberry. The process is simple and the cost is low, but it is easily affected by the weather and the quality is different. In addition, common techniques for drying wolfberry include hot air drying, vacuum pulse drying, and freeze drying, but there are still many deficiencies. Atmospheric pressure hot air drying technology requ...

Examples

Embodiment 1

[0097] Example 1 A process for drying wolfberry with a vacuum pulsation cold-drying device, using the device of the present application, comprising the following steps:

[0098] (1) Preheating

[0099] Lycium barbarum fresh fruit is placed in the drying chamber 2, and the temperature of the plate layer 6 of the drying chamber 2 is set;

[0100] Wherein, the temperature of the plate layer 6 is 55°C.

[0101] (2) Vacuum pulsation

[0102] Open the partition plate 4, evacuate the water ring pump 8, evacuate the Roots pump 7, and cold trap 5, and set the range of pulsating vacuum;

[0103] When the lower limit of pulsating vacuum is reached, turn off the evacuation Roots pump 7 and the evacuation water ring pump 8 in sequence, turn on the maintenance water ring pump 10 and maintenance Roots pump 9, and set the maintenance time one;

[0104] Reach maintenance time one, open dehumidifier 14, heater two 15, intake valve 13 and carry out aeration;

[0105] When the upper limit o...

Embodiment 2

[0114] With embodiment 1, the difference is that,

[0115] In step (1), the temperature of the plate layer 6 is 50°C.

[0116] In step (2), the temperature of the cold trap 5 is-45°C; the maintenance time one is 15min, and the maintenance time two is 5min; the number of vacuum pulses is 20 times, and the gas used during aeration is clean nitrogen; The temperature is 45°C, and the relative humidity is ≤45%RH.

[0117]In step (3), vacuum freeze-drying is carried out in stages, and the vacuum degree of vacuum freeze-drying is 400 Pa; when drying, the temperature of the plate layer is 55° C., and the drying time is 5 hours.

Embodiment 3

[0119] With embodiment 1, the difference is that,

[0120] In step (1), the temperature of the plate layer 6 is 60°C.

[0121] In step (2), the temperature of the cold trap 5 is-25°C; the maintenance time one is 18min, and the maintenance time two is 8min; the number of vacuum pulses is 15 times, and the gas used during aeration is clean air; The temperature is 40°C, and the relative humidity is ≤45%RH.

[0122] In step (3), vacuum freeze-drying is carried out in stages, and the vacuum degree of vacuum freeze-drying is 50 Pa; when drying, the temperature of the plate layer is 55° C., and the drying time is 4 hours.

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