CN1385085A - Preparation for granular tea - Google Patents

Abstract

The production process of granulated tea includes the following steps: adding 10-15% of water in semi-finished tea, fully stirring, standing still, pressing and controlling water content in the tea and making it be 12-20%, its pressure is 20-25 MPa, retaining pressure for 20-30 sec., drying and package to obtain the invented finished product. After having been demoulded said pressed tea can be baked at below 60-80 deg.c for 15-30 min., after it is dried, its water content is controlled below 6%. The granulated tea can be made into various forms of flat cylindrical form, ball form, square form and leaf form, etc. Said tea is easy to package and carry about, and can be stored for a long period.

Description

Preparation for granular tea

Technical field:

The present invention relates to a kind of preparation method of tea, especially a kind of preparation for granular tea.

Background technology:

Compressed tea be with various gross tea through sieve, cut, process such as selection by winnowing, become semi-finished product tea, pass through compression moulding again, become compressed tea.

The production history of compressed tea is long, and output is bigger Hunan, Yunnan, Hubei.Though the compressed tea producing region is many, designs and varieties are quite a few, its drawing method basically identical, just the mould difference of proportion of raw materials, Unit Weight, use.According to relevant material introduction, the compressed tea processing method in each producing region is as follows substantially:

1, compressed tea procedure in Yunnan is: raw material is assorted → screening → semi-finished product are assorted → claim tea → steaming tea → mold pressing → drying → packing.

When paying system, various tea are material rate and preparing in accordance with regulations, sieves out lid tea and end tea, by the semi-finished product pattern and after becoming the lid tea and lining tea two rafts of various compressed teas, fully and even, suppresses according to the lid tea and the lining tea ratio of various compressed teas again.Operations such as compacting also divides and claims tea, steaming tea, exerts pressure, drying.

Claim tea: according to the water content of paying tea making, become to sample tea standard water-content in conjunction with rate of processing loss, calculate various tea weight, take by weighing respectively then and cover tea and lining tea is poured in the mould, tea in falling earlier covers tea again, pays steaming then, paying the water content of steaming is about 15%, then is increased to 18～19% after steaming.98 ℃ of steam temperatures steamed about 5 seconds.Mold pressing is to adopt column to press the tea machine, this machine is main exerts pressure to tealeaves by the rotation eccentric wheel weight that rises and falls earlier, 10 kilograms of weight pressure, general each hammering 3～5 times, drying is carried out in the demoulding then, drying is to utilize steam heat conduction to distribute and improve the drying room temperature from pipeline, and generally drying by the fire temperature is about 40 ℃, dries by the fire 13～14 hours.Pack the warehouse-in as ready then.

2, compressed tea procedure in Hunan is: gross tea sub-sieve removal of impurities → assorted → title tea → steaming tea → precompressed → pressure brick → cool off → move back brick → repair brick → inspection brick.

Gross tea is determined composition of raw materials according to the processing sample before the system of paying, carry out assortedly then according to prescription, notes the non-teas foreign material of rejecting assorted before.

Steam the compression set type: claim that tea is to guarantee that the product Unit Weight meets standard; Steaming tea is to make the deliquescing of tea base, increases viscosity, and generally steaming the tea temperature is 102 ℃, and pressure is 6 kilograms of every square meters, steams for 3～4 seconds, steams the base water content and is controlled at 17～18%.Adorn casket then while hot, tea is taken off flat, cover pressing plate, be pushed into precompressed under the preformer, make the tea volume-diminished, so that load onto second brick tea, the tea casket that installs second brick tea is pushed under the big forcing press and presses, big press adopts friction wheel to rotate, and pressure is 28 tons, and this machine can be pressed 2 tiles at every turn.Steam through High Temperature Gas and high pressure after brick be pushed into cold and put and allow it fix on the track, in pressing mold, cooled off 2～2.5 hours, be transported to then and move back under the brick machine, unclamp screw, go out fragment of brick, moving back brick machine pressure is 3.5 tons.Withdraw from the brick input and repair in the brick machine,, make profile meet product requirement excessive tea equating, promptly change drying room over to after compacting is finished and carry out drying, brick and brick distance are 1 centimetre, and it is high that temperature is grasped formerly low back, the highest can not generally the baking about 8 days above 75 ℃, brick water content 13% is advisable.

3, Hubei compressed tea drawing method: claim tea → steaming tea → press → cool off → finalize the design → move back brick → drying → inspection brick.

Claim tea to pack into according to face, the end, each ratio of lining and steam in the tea wood bailing bucket, the wood bailing bucket that installs tea is sent to decatize in the food steamer successively that temperature is 100～102 ℃ in the cage, lasts 25 minutes.To put to preformer from the hot tea bailing bucket of releasing in the cage then, tea is pressed in the iron bucket mould, cover the trade mark lid, again iron bucket mould is delivered to press under the press fixing, iron bucket mould after typing pressed is delivered to and is pressed fixingly under the main press, and the iron bucket mould after typing pressed is pushed on the transfer matic, is supported by start and opens the iron hangers, remove the gauze cap wing by the electronic cap machine of getting again, move back the brick machine and then the brick bat in the iron bucket mould is gone out.Carry out drying after brick tea withdraws from, drying is to pass through steam pipe in drying room, and hot gas is diffused in the drying room from tube wall, and brick is edge-on, 1 centimetre of every brick distance, highly is 12～14 layers by 4 every layer, temperature takes earlier low back high, slowly rises to 70 ℃ from 30 ℃, dries by the fire 10～12 days.

Similar substantially from the compressed tea processing technology of above several provinces, its advantage is to make the best use of everything, because its major part all is to adopt old tea, designs and varieties are a lot of in addition, and weak point is that program is numerous and diverse, because volume is big, weight so drying time is long, and becomes tea because volume is big generally at 0.5～0.25 kilogram, tightly tie again, so be difficult for disperseing, brewing.

Summary of the invention:

The gross tea that the objective of the invention is to contain certain moisture is directly put into and is pressed in the tea machine mould, utilize hydraulic press pressurization typing, tightly tied, thin real particle tea, thick, loose to solve various traditional gross tea profiles, it is numerous and diverse to be easy to tide change, suction peculiar smell and compressed tea procedure, volume is big, the problem that difficult dispersion is drunk, make it to be convenient to pack, store, carry and brew, tightly tie owing to small volume structure simultaneously, greatly reduce on the surface that contacts with air, and extremely is helped keeping for a long time its color, prolongs storage period.

The technical solution used in the present invention is: semi-finished product tea is added the water of tea amount 10～15%, fully mixes thoroughly, put, compacting, the tea water content is controlled at 12～20%, pressure 20～25Mpa, 20～30 seconds of pressurize, drying, pack the particle tea product.Under 60～80 ℃ of temperature, dried by the fire 15～30 minutes after the pressed tea depanning, dried finished products tea water content is controlled at below 6%.The shape of particle tea can be oblate cylindricality, circle, different shape such as square, leaf.

At the beginning of the gross tea made through the long sub-sieve of trembling, the length of compass screen surface, thick tea are cut through roller cutter roller, and then multiple sieve, each of sifting out number tea is through selection by winnowing, remove tea wood, pornographic movie and foreign material, assorted then mixed heap, add 10～15% water (cold and hot all can) by former tea amount, mix thoroughly, placed about 20～30 minutes, make to begin compacting after the abundant moisture absorption deliquescing of its gross tea, it is 0.3～0.5 kilogram that pressed tea feeds intake at every turn, altogether 100.During compacting water content is dropped in the hydraulic pressure granule-forming machine nib at 12～20% semi-finished product tea, the primer fluid press, making forcing press movable pressing board band the cope match-plate pattern depression bar is pressed into and is a granulated in the pattern, operating pressure is 20～25Mpa, pressurize 20～30 seconds is pressed into the graininess of tight knot with tealeaves, and the demoulding oil cylinder promotes demoulding push pedal subsequently, the counterdie push rod is ejected graininess tealeaves, can pack after the drying.

Technology of the present invention is no matter on screening program or compaction procedure, all simplify very much, reasonable in design, the production efficiency height, constant product quality, small product size is little, is convenient to packing, carries and brew and drink, and production process workman is easy to grasp, and do not steaming tea or do not adding under the situation of any adhesive, the product appearance of making is tightly tied light, is keeping the flavour and the fragrance of former tea again simultaneously, and can prolong storage period.

The specific embodiment:

Gross tea processing at first is finishing appearance.Profile with a collection of gross tea has different forms, has pine to have tightly, has length that weak point is arranged, and having has greatly carefully, extremely irregular, so must make long and short, thick, thin tea mixed in together through different processing through screening, suitable to reach length, size is consistent, thereby meets the requirement of profile neat appearance

Before the system of paying bilayer on the gross tea trembled the screening sieve, compass screen surface is gone up after roller is cut again and is longly trembled multiple sieve, and winnowing machine is removed pornographic movie, tea dust on each number tea after sieving, semi-finished product tea and heap mix thoroughly.

This technology particle tea compaction procedure:

Semi-finished product tea → tidewater → mix thoroughly → put → adorn mould → press → depanning → drying → packing.

Through the screening semi-finished product tea and pile, mix thoroughly after, can tidewater, (hot water or cold water all can to add water 10～15% according to each batch tea actual weight, but the hot water better effects if), mix thoroughly tea is fully mixed with water, put 20～30 minutes (cold water) then, hot water got final product in 5～15 minutes, tea fully absorbs the moisture deliquescing, increases viscosity, is convenient to compacting.After the tealeaves deliquescing, in nib in time 0.3～0.5 kilogram of raw material input particle tea moulding of every mould, the primer fluid press drives the patrix depression bar and is pressed in the moulding in the mould, the cope match-plate pattern operating pressure is 20～25Mpa, after the pressurize 20～30 seconds, tealeaves is pressed into the graininess of tight knot, start the de-oiling cylinder then, promote stripper plate, following film push rod is ejected particle, the tea grain of depanning is thrown on the continuous dryer, need not start carrier bar, dried by the fire 15～30 minutes, temperature is grasped about 60～80 ℃, can pack the warehouse-in as ready after the drying.

, fried green gross tea blue or green through the baking of many employings half a year different stage have been cooked multiple batches of production trial-production, more than every batch of jin all up to a hundred, difference is little on the particle appearance that obtains, no matter be tender tea or old tea, the outward appearance that this explained hereafter goes out all reaches tight knot brightness effect, and has kept the fragrance and the flavour of former tea quality.During trial-production, be that tea is pressed into as one of big button-type, every 3 gram, one we place goods on trial sale trial product to the client just in time towards cuppa, obtain many clients' favorable comment, and selling price improves more than 50%.Send two tea to participate in Guangxi " osmanthus teacup " well-known tea comparation and assessment in 2002 in addition, obtain 2 new product Innovation Awards.Through nearly half a year of many trial-production with constantly grope, draw that different pressures proposes best pressing conditions simultaneously to the effect of particle tea outward appearance in different gross tea water content and the pressing process.

Optimum condition in the compressed granulate tea process

The project optimum condition

Tealeaves leaf temperature is more than 50 ℃ during pressure

Gross tea water content 12～20%

Every pressure time gross tea is thrown 0.3 kilogram of amount of leaf (3 gram/grain)

Operating pressure 20～25Mpa during pressure

Pressurize 30 seconds

That color and luster changes is grayish green～and blackish green

Aroma change delicate fragrance～ripe perfume (or spice)

Granulating rate 98%

Embodiment:

Take by weighing 150 kilograms of gross tea, the last long screening sieve of trembling, with each number tea through selection by winnowing, after semi-finished product tea, press the tea actual amount then, add 15 kg of water and mix thoroughly, place after 20 minutes, by every pressure time 0.3 kilogram mould in the granulating and forming that feeds intake into, the starting pressure machine drives the patrix depression bar and is pressed in the moulding in the mould then, as pressure is 20Mpa, and pressurize started demoulding oil jar and promotes stripper plate after 30 seconds, the counterdie push rod is ejected particle tea, this particle tea is that to be pressed into diameter be 26mm, the oblate cylindricality of high 10mm, every heavy 3 grams.The particle tea of moulding is put into dryer, does not start carrier bar, quiet baking 20 minutes, temperature is controlled at about 60 ℃.After drying goes out machine, pack warehouse-in.

Claims (3)

1, a kind of preparation for granular tea, with gross tea screening, selection by winnowing, and heap or assorted, make semi-finished product tea, it is characterized in that: the water that semi-finished product tea is added tea amount 10～15%, fully mix thoroughly, put, compacting, the tea water content is controlled at 12～20%, pressure 20～25Mpa, 20～30 seconds of pressurize, drying, pack the particle tea product.

2, preparation for granular tea according to claim 1 is characterized in that: under 60～80 ℃ of temperature, dried by the fire 15～30 minutes after the pressed tea depanning, dried finished products tea water content is controlled at below 6%.

3, preparation for granular tea according to claim 1 is characterized in that: the shape of particle tea can be oblate cylindricality, circle, different shape such as square, leaf.