CN102657271A

CN102657271A - Automatic multi-stage countercurrent extraction method of tea infusion

Info

Publication number: CN102657271A
Application number: CN2012101333116A
Authority: CN
Inventors: 潘丰; 于春海; 张相胜
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2012-09-12

Abstract

The invention discloses an automatic multi-stage countercurrent extraction method of tea infusion, belonging to the field of drink processing. The invention in particular relates to automatic drink processing production process control technology. The method is characterized in that a two-stage countercurrent extraction mode is adopted in the countercurrent extraction process of tea infusion to ensure softened water to be fully contacted with tea powder to obtain high-quality tea infusion. The method has the following beneficial effects: the time required by the tea infusion production process can be greatly shortened; the high-quality tea infusion can be obtained only through one cycle; the extraction efficiency is high; besides, the process parameters are easy to control, the equipment runs stably, less manpower is required in the whole process, the economic benefits are high and the method is beneficial to large-scale production.

Description

A kind of tea juice multi-stage countercurrent extraction method

Technical field

The invention belongs to the beverage processing field, more relate to beverage processing production process automatic control technology.

Background technology

Tealeaves is one of world-renowned three big beverages, and it quenches the thirst except having, also conveniently have very large effect in the prevention of disease clear refreshing, the diuresis; Extraction for tea juice; It is not only consuming time big that traditional method adopts general water seaoning or present widely used single-stage counter-flow extraction to send out method, and extraction efficiency is low, and the tea juice concentration of extraction is also lower; And also be mixed with the tea powder in the tea juice, tea juice inferior quality.

The invention discloses a kind of tea juice multi-stage countercurrent extraction method, a kind of quick, stable method is provided for producing high-quality tea juice.

Summary of the invention

Be the tea juice of volume production of high quality, the invention provides a kind of tea juice multi-stage countercurrent extraction method, the counter-flow extraction process of tea juice adopts the two-stage countercurrent extracting mode; Demineralized water and tea powder are fully contacted to obtain high-quality tea juice, and a circulation gets final product quickly discharging, has shortened the required time of tea juice production process greatly; Procedure parameter is easy to control, stable equipment operation, and the required manual work of whole process is few; Economic benefit is high, is beneficial to large-scale production.

The present invention also provides a cover counter-flow extraction automatic control system, and system's composition relates to PLC, related expanding module, touch-screen, associated actuator and detecting sensor etc., is mainly concerned with methods such as temperature control and sequential control.

Temperature control mainly is constant (the actual temp value is adjustable) that maintains the temperature at moment in two extractors of control.Temperature control system hardware comprises temperature sensor, temperature collect module, PLC, heater, magnetic valve and relevant device.

Rotating speed control: the fltting speed that mainly is a spiral propeller of control and No. two spiral propellers remains on setting value n ₁And n ₂Locate constant.

Sequential control mainly is boot sequence, start-up time of accomplishing several motors in the counter-flow extraction process, hold time etc., specifically is to decide according to the leaching process and the technological requirement of tea juice.

Description of drawings

Fig. 1 is the structure chart that tea juice multi-stage countercurrent extracts equipment automatically.

Fig. 2 is the flow chart of tea juice multi-stage countercurrent extraction method.

Numbering 1 is that spiral propeller, 2 is that extractor, 3 is that pulp digger, 4 is that No. two spiral propellers, 5 are that No. two extractors, 6 are No. two pulp diggers, the 7th among Fig. 1, and squeezer, the 8th transmits motor, the 9th, and transmitting passage, 10 and be tubing pump, 11 is No. two tubing pumps.

The specific embodiment

Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.

(1) one-level is extracted: at the demineralized water of 45～60 ℃ of water inlet end addings, the power of water inlet is provided by the tubing pump that is installed in water inlet end, when waterflow stabilization; Open spiral propeller No. one, tea powder (being got into by feed end) is flowed to a pulp digger end, form adverse current with demineralized water; Because propeller is a helical form, can be separated into many little spaces to extractor, has so just slowed down flow rate of water flow; Prolong the time of contact of demineralized water and tea powder, wherein, No. one extractor keeps water temperature T ₁Constant, No. one spiral propeller keeps fltting speed n ₁Constant.

(2) secondary extracts: form 90 ° knuckle between the pipeline of a pulp digger connection and No. two extractors; Can utilize the gravity of tea powder self to be easy to get into to participate in secondary in No. two extractors and extract, after the tea powder got into No. two extractors, No. two spiral propeller was opened automatically; Advance the tea powder to flow to a left side from right; Get into secondary and extract the stage, wherein, No. two extractor keeps water temperature T ₂Constant, No. two spiral propeller keeps fltting speed n ₂Constant.

(3) the fluid stage: after the secondary counter-flow extraction finished, tea juice flowed out via the fluid pipeline, and the tea powder is sent into squeezer through No. two pulp diggers, was discharged by discharge pipe through the squeezing back.

Claims

1. a tea juice multi-stage countercurrent extraction method is characterized in that, the counter-flow extraction process of tea juice adopts the two-stage countercurrent extracting mode, and demineralized water and tea powder are fully contacted to obtain high-quality tea juice, and a circulation gets final product quickly discharging.

2. tea juice multi-stage countercurrent extraction method according to claim 1; It is characterized in that: in the counter-flow extraction process of tea juice, will carry out constant control, the fltting speed of a spiral propeller and No. two spiral propellers is kept constant the temperature in extractor and No. two extractors.