Technique and equipment for preparing tea beverage

Abstract

The invention relates to a method for preparing a tea drink and a device thereof. Raw materials of tea leaves after being immersed in liquor are made into rough materials, cooled, flocculated and settled; supernatant obtained is then screened to be prepared into the tea drink. The filtration procedures comprise: a primary filtration: the supernatant after the flocculation settlement is conveyed into a primary filtration device which is provided with a folded filter bag used for initial filtration; a secondary filtration: the supernatant obtained is then conveyed into a secondary filtration device which is internally provided with a folded filter element used for pre-filtration so as to obtain a primary clear liquor; a tertiary filtration: the primary clear liquor then enters into a tertiary filtration which is provided with a folded filter element; then fine filtration is carried out for the primary clear liquor so as to prepare the finish product of strong tea liquor. The strong tea liquor is then mixed with pure water with the volume 7-8 times of the tea liquor; additive is added to make the tea drink. The method has the advantages of low device cost, high production efficiency and low limitations for primary procedures as well as the advantages that the strong liquor can be re-filtered, with high yield and continuity for production; the filter element is liable to be treated with back flushing, with long service life and the finished product of the strong tea liquor can achieve 5-20 NTU in turbidity and the tea polyphenols content can be as much as 1,800.

Description

technical field [0001] The invention relates to a process and equipment for preparing tea beverage, in particular to a filtering process and equipment for preparing tea beverage. Background technique [0002] In the preparation process of tea beverages, since tea beverages are all brewed with water and tea leaves to make tea crude products, the crude products contain a large amount of tea dregs and need to be filtered to obtain canned tea beverages. The traditional preparation process includes adding tea leaves to water for soaking, cooling, flocculation and sedimentation, filtering tea dregs, and taking clear liquid to make tea beverage. [0003] In the filtration process of tea beverages, the coarse filtration process includes setting a plurality of filter leaves in the filter device, using diatomaceous earth as a filter aid, etc.; Used together, the tea dregs can be further removed through the adsorption and interception of the cardboard. [0004] In addition to the abo...

AI Technical Summary

Problems solved by technology

[0006] However, centrifugal filtration has the following disadvantages: (1) The investment cost and maintenance cost of the centrifugal device are high; (2) The production efficiency and output of the centrifugal device are low, and the processing capacity is generally 6 tons / hour. To increase the processing capacity, it is necessary to purchase a larger scale (3) Centrifugal separation mainly utilizes the different specific gravity of the tea liquid and residue in the crude product for centrifugal separation, and the impurities with the same specific gravity as the tea water cannot be removed; (4) The crude product contains some beneficial substances, which will be separated by centrifugal separation Beneficial substances and non-beneficial substances are removed together; (5) After centrifugal filtration, in order to ensure the turbidity of the supernatant, it is necessary to extract the supernatant according to the experience of the operator, resulting in a waste of strong tea liquid; or further filtration is required, complicate the process

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