1 results about "Blanching" patented technology

The invention discloses an asparagus freeze-drying process and device. The asparagus freeze-drying process comprises the following steps: A, carrying out sorting and cleaning, i.e., selecting fresh asparagus of which the tail diameter is below 0.8 to 1cm, cleaning the fresh asparagus with water, and removing silt; B, cutting into sections, i.e., cutting the cleaned asparagus into sections with thecutting length of 10 to 15cm; C, removing green, i.e., blanching the cleaned asparagus in salt water containing 1% to 5% of salt, and after completing blanching, immediately cooling the blanched asparagus, wherein a blanching temperature is 95 to 100 DEG C, and time is 2 to 4 minutes; and D, placing on a tray, i.e., placing the asparagus subjected to green removal on the tray; Compared to the prior art, the quality guarantee period can be prolonged purely naturally under the condition of not adding any preservative, the requirement of people for the asparagus throughout the year is met, drying is uniform, and the product quality is good.