Preparation method of wild jujube leaf tea

[0019] Example 1

[0020] A preparation method of jujube leaf tea includes the following steps:

[0021] (1) Collect fresh jujube leaves in March and April and freeze-dry to a water content of 15%. The freeze-drying is specifically a vacuum of 20Pa, a temperature of minus 40°C, and a time of 48h;

[0022] (2) The dried jujube leaves are put into the steam explosion equipment, and nitrogen is first introduced to make the pressure in the steam explosion equipment reach 0.4MPaMPa;

[0023] (3) Then quickly pass in saturated steam to make the pressure of the steam explosion equipment reach 1.2MPa and keep it for 300s;

[0024] (4) Instantly eject the steam explosion to obtain the jujube leaves and explosion fluid after explosion;

[0025] (5) Mix the blasting liquid and the wild jujube leaves uniformly, dry, and dry specifically in a vacuum zone of 20 Pa, a temperature of 40° C., and a time of 24 hours to obtain wild jujube leaf tea.

[0026] Example 2

[0027] A preparation method of jujube leaf tea includes the following steps:

[0028] (1) Collect fresh jujube leaves in March and April and freeze-dry to a water content of 18%. The freeze-drying is specifically a vacuum of 100Pa, a temperature of minus 45°C, and a time of 40h;

[0029] (2) The dried jujube leaves are put into the steam explosion equipment, and nitrogen is first introduced to make the pressure in the steam explosion equipment reach 0.5MPa;

[0030] (3) Then quickly pass in saturated steam to make the pressure of the steam explosion equipment reach 1.5MPa and keep it for 120s;

[0031] (4) Instantly eject the steam explosion to obtain the jujube leaves and explosion fluid after explosion;

[0032] (5) Mix the blasting liquid and the wild jujube leaves uniformly, dry, and dry specifically in a vacuum zone of 60 Pa, a temperature of 50° C., and a time of 20 hours to obtain wild jujube leaf tea.

[0033] Example 3

[0034] A preparation method of jujube leaf tea includes the following steps:

[0035] (1) Collect fresh wild jujube leaves in March and April and freeze-dry the fresh wild jujube leaves to a water content of 20%. The freeze-drying is specifically a vacuum degree of 60 Pa, a temperature of minus 50°C, and a time of 36 hours;

[0036] (2) The dried jujube leaves are put into the steam explosion equipment, and nitrogen is first introduced to make the pressure in the steam explosion equipment reach 0.6MPa;

[0037] (3) Then quickly pass in saturated steam to make the pressure of the steam explosion equipment reach 1.3MPa, and keep it for 200s;

[0038] (4) Instantly eject the steam explosion to obtain the jujube leaves and explosion fluid after explosion;

[0039] (5) Mix the blasting liquid and the wild jujube leaves evenly, dry, specifically in a vacuum zone of 100 Pa, a temperature of 60° C., and a time of 18 hours to obtain wild jujube leaf tea.