CN1126035A - Technique for prepn. of super fine tea powder - Google Patents

Abstract

The process for preparing ultrafine tea powder includes steaming fresh tea leaves for killing enzyme activity and bacteria, wind cooling and dewatering, classifying, baking (parching), puffing, removing impurities and dust, crushing, and sieving using 300-mesh sieve. The obtained tea powder contains all active components of tea leaf, including chlorophyll (up to 0.38%) and trace elements.

Description

The preparation technology of super fine tea powder

The present invention relates to a kind of preparation technology of ultra micro granularity tea powder.

World nutrition educational circles points out " king that tea will become the 21 century beverage ".World Tea Production state has finished loose tea at people's fast pace life style---exploitation of bag tea---instant tea---liquid tea, the also production tea delivery powder that has.

The instant tea of producing both at home and abroad has Japanese oolong, Changsha black tea crystalline substance, Hainan black tea powder at present, and Japanese green dust tea, they all adopt dried tea lixiviate to be condensed into powder craft and make, need when drinking to brew with boiling water, the utilization rate of active components of tea is less than 40%, and protein, vitamin, chlorophyll, carrotene, trace element that especially wherein is insoluble to boiling water etc. all goes out of use.In addition, in leaching process, the marennin in the tealeaves is converted into theaflavin and congo red element, can only produce black tea and oolong tea, and its local flavor also changes greatly.Only about 100 orders, drink needs to reconstitute with boiling water SEN CHA end granularity, and inlet has the slag sense, all is crineous as food additives.Hainan black tea powder now is used for the mineral water companion.

Purpose of the present invention aims to provide a kind of technology that fresh and tender Tea Processing can be become 300 order tea powder, can effectively keep chlorophyll composition in the tealeaves by this processes tea powder.

The objective of the invention is to realize in the following manner, the preparation technology of super fine tea powder is: choose cleanliness earlier, sanitary index meets general tealeaves standard, marennin content is 0.4% ± 0.03%, caffeine content 4% ± 0.3%, the fresh tea passes of crude fiber content 15% ± 1%, kill enzyme through steam, after the sterilization, remove surperficial moisture content by the selection by winnowing heat radiation, stepping, baking (stir-fry) is done expanded, make water content to 3-4%, cooling is broken into sheet through the high speed airduct again, further removal of impurities, stalk is picked in dust removal, sweater is put into micronizer powder process, cross 300 mesh sieves, get product.

But with technology processing green tea of the present invention, black tea, black tea, white tea, jasmine tea and compressed tea fresh tea passes, tealeaves need only be done expanded through baking (stir-fry), make water content to 3-4%, be broken into sheet through the cooling of high speed airduct again, further removal of impurities, dust removal, pick stalk, sweater, put into micronizer powder process, cross 300 mesh sieves, get product.Adopt this technology can all keep former effective composition of each teas and local flavor.Make compressed tea can change always, greatly, deceive, thick exterior of commodity, it is more convenient to carry, drink; Make rich selenium tea, can improve about 5 times of human intaking amounts.The water leaching rate of selenium is 10-22% in the tealeaves, and can all be taken in by human body by the product selenium of this processes.

This technology through dewater expanded after, water content in the green tea is 3-4%, its chlorophyll content of bud green tealeaves of ad eundem is generally 0.42%, when being processed into green tea because of through rubbing technologies such as refining, chlorophyll content only is 0.22%, and is 0.38% by the super fine tea powder chlorophyll total amount of this explained hereafter, driedly sees still the bath back is wet and sees all have natural leaf green, but and the fresh-keeping nondiscolouring of long period oneself, adjusting function of human body, the antitumor action of green tea are strengthened.

Also the dried gross tea of black tea, oolong tea, black tea, white tea, jasmine tea and compressed tea can be made super fine tea powder with technology of the present invention.Earlier dried gross tea requires oolong tea, black tea, white tea, compressed tea moisture content 3-4%, jasmine tea moisture 7-8%.Dried gross tea only needs through the fragmentation of high speed airduct, removal of impurities dust removal, picks stalk, sweater, puts into the ultra micro machine and pulverizes, and crosses 300 mesh sieves, gets product.

The also reproducible slabbing of compressed tea ultra micro powder, thin block.This compressed tea presses fragment of brick tea than tradition with what the direct height of tealeaves was pressed into, seems attractive in appearance, small and exquisite, meticulous, carries, drinks conveniently.

This super fine tea powder can be warm towards cold punching, instant-drink, dashes with green tea especially and make the cold drink best results with pure water or mineral water.Drinking this tea powder and can reduce with the tea amount over halfly, is 1: 50 by the standard tea-water proportion of evaluating, and this tea powder is 1: 100, and by common people's standard for drinking, tea-water proportion is 3: 200, and this tea powder is 1: 200, and promptly every glass of tea consumption only gets final product about 1g.Utilize this tea powder to make canned tea water or iced tea need not soak by boiling water, can be directly with Chilled Drinking Water promptly towards immediate shipment, health fast, small investment, cost are low.

300 screen residues in this technology can get four kinds of byproducts successively after 200 orders, 140 mesh sieves, 60 mesh sieves.The middle-grade byproduct of 200 purposes can be used as seasoning, the blending of beverage, drink, blending flavor tea, fruity tea, milk tea, tea wine, medicinal herb tea etc.140 purpose byproducts can also be prepared anticarious tooth paste, chewing gum, bath hair articles for use, ice cream etc. with painted, anti-oxidant, the bactericidal agent of food.60 order byproducts can be used for food such as tea making bread, the refreshment heart; The above residue on sieve of 60 orders can be made senior tea in bag.

Tea quality supervision and inspection center of the Ministry of Agriculture is detected this tea powder sense organ, quality, and its every characteristics see Table 1, and index sees Table 2, table 1

Profile	The soup look	Fragrance	Flavour	At the bottom of the leaf
					The light color powder	Dark green, tea powder mixes in soup matter	Pure	Dense	Green paste

Annotating the tea water pouring ratio is 1: 50

Conclusion is: this green tea powder powder exquisiteness, color and luster green bright, belong to top grade in the homemade powder tea.Table 2

Moisture %	Tea polyacid %	Amino acid %	Caffeine %	Chlorophyll total amount %	Total ash %	Crude fibre %
							???5.8	???25.2	????1.8	????4.0	?????0.38	????6.1	???--

Test method standard is GB8304-87, GB8306-87, GB8312-87, GB8313-87, GB8314-87, and conclusion is that physical and chemical composition content is normal.

This tea powder detects sanitary index through above-mentioned test center, Sanitation and Antiepidemic Station, Wuhan City, and wherein BHC, DDT, copper, lead content all meet the requirements.

Technology of the present invention fast, simple, health, small investment, cost be low.The tea powder of producing can all keep former effective composition of tealeaves and local flavor, and cold punching heat is dashed, and instant-drink is drunk no slag sense, and tea dry and include nutritional labeling, trace element are almost all taken in by human body and utilized.

Claims (3)

1, the preparation technology of super fine tea powder, it is characterized in that choosing that cleanliness, sanitary index meet that general tealeaves standard, marennin content are 0.4% ± 0.03%, the fresh tea passes of caffeine content 4% ± 0.3%, crude fiber content 15% ± 1%, after steam kills enzyme, sterilization, remove surperficial moisture content by the selection by winnowing heat radiation, stepping, baking (stir-fry) is done expanded, make water content to 3-4%, cooling is broken into sheet through the high speed airduct again, stalk, sweater are picked in further removal of impurities, dust removal, put into micronizer powder process, cross 300 mesh sieves, get product.

2, preparation technology according to claim 1, it is characterized in that fresh tea passes can be green tea, black tea, black tea, white tea, jasmine tea and impacting tea, tealeaves need only be done expanded through baking (stir-fry), make water content to 3-4%, be broken into sheet through high speed airduct cooling again, further removal of impurities, dust removal, pick stalk, sweater, put into micronizer powder process, cross 300 mesh sieves, get product.

3, preparation technology according to claim 1 is characterized in that 300 screen residues can be successively cross 200 mesh sieves, 140 mesh sieves, 60 mesh sieves, with residue on sieve altogether four kinds of byproducts.