CN104970311A - Processing method of dried litchi chinensis - Google Patents
Processing method of dried litchi chinensis Download PDFInfo
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- CN104970311A CN104970311A CN201510318893.9A CN201510318893A CN104970311A CN 104970311 A CN104970311 A CN 104970311A CN 201510318893 A CN201510318893 A CN 201510318893A CN 104970311 A CN104970311 A CN 104970311A
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- litchi
- litchi pulp
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- litchi chinensis
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Abstract
The present invention belongs to the field of litchi chinensis processing and relates to a processing method of dried litchi chinensis, which comprises the following steps in sequence: selecting fresh litchi chinensis with thick flesh and small kernels, and cleaning, peeling, and removing the kernels of the litchi chinensis to obtain the litchi chinensis fruit pulp; soaking the litchi chinensis fruit pulp in an aqueous solution of 0.2% NaHSO3 , 0.1% citric acid, and 0.2% CaCl2 for 2-3 hours; blanching the hardened the litchi chinensis fruit pulp in a hot water at 90-100 DEG C for 2-3 min; then placing the litchi chinensis fruit pulp in a cold storage at -20 to 0 DEG, rapidly decreasing the water activity of the litchi chinensis fruit pulp to be less than 0.6 and the moisture content to be lower than 50% by using a dehumidifier; and finally putting the litchi chinensis fruit pulp in a drying oven, hot air drying at 50 DEG C for 8-10 hours with a hot air flow rate of 1-2 m/s until the moisture content is lower than 25%, and then cooling and packaging. The present invention provides a processing method of dried litchi chinensis with full appearances and good color, and the processing method has low processing costs.
Description
Technical field
The present invention relates to the manufacture field of lichee, particularly a kind of processing method of dried litchi.
Background technology
Lichee is the famous southern local product fruits of China, the tender succulence of meat, and aromatic flavour, is rich in the nutritional labeling of multiple needed by human, has nourishing and medical value, enjoys the good reputation of " south of the Five Ridges fruit king " and " really treasure ", deeply likes by domestic and international consumer.But lichee is gathered in the crops at torridity summer, preservation and freshness difficulty, brown stain with rot serious.Along with Yield of Litchi increases, by marketing fresh and process few restriction, post-harvest loss is up to 20%; Above, great waste is caused.
Chinese patent 200810219531.4 discloses the processing method of a kind of dried litchi, dried longan, it is that-40 ~ 5 DEG C of freezers are preserved that lichee or longan put into temperature after packing without spinning by antibacterial polypropylene spunbond method, by reducing freezer humidity, pericarp water activity is down to rapidly and is less than 0.6, pulp moisture slowly volatilizees, after 4 ~ May, lichee or longan pulp moisture are down to 25%, become dried litchi or dried longan.But this process long processing time, cost is high, and is not suitable for small lot and small enterprise, family's workshop processing, and lichee does not remove pericarp and fruit stone, and edible inconvenient and outward appearance quality is inconvenient to observe, and is unfavorable for sale.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned technical problem, provides a kind of processing method of dried litchi.By shaping to litchi pulp, it is full that oven dry obtains outward appearance, and the dried litchi that quality is excellent, is conducive to market sale.And easy to process, processing cost is low, is conducive to small enterprise and family's workshop processing.
Technical solution of the present invention is: a kind of processing method of dried litchi, comprises the following steps and carries out successively,
Step one, chooses fresh, that meat is thick, core is little lichee, and through cleaning, peeling off, stoning obtains litchi pulp;
Step 2, puts into 0.2%NaHSO by described litchi pulp
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2-3 hour, the litchi pulp of by the time sclerosis;
Step 3, puts into 90 DEG C-100 DEG C hot water blanching 2-3min by the litchi pulp hardened in step 2; Taking-up normal temperature drains;
Step 4, puts into the freezer of-20-0 DEG C by the litchi pulp in step 3, use dehumidifier to reduce rapidly litchi pulp water activity lower than 0.6, and litchi pulp moisture is reduced to 50%, recover normal temperature;
Step 5, puts into drying baker by the litchi pulp in step 4, adopts 50 DEG C, 1-2m/s hot-air seasoning 8-10 hour, obtains the litchi pulp of water content less than 25%, cooling, packaging.
Wherein, step 2 mainly to litchi pulp sclerosis, ensures the maintenance of drying course profile.
Step 3 mainly to litchi pulp blanching, blanching treatment can inactive enzyme active, prevent enzymatic browning; Stablize or improve color and luster; Reduce the pollutant in pulp and micro organism quantity.
Step 4 comprises the sizing to the initial stage of oven dry, and wherein prior art shows that litchi pulp water activity reduces rapidly lower than 0.6, can stop most of microbe growth, guaranteed quality quality.
Step 5 comprises dries further to litchi pulp, and obtains needing dried litchi quality.
Preferably, the litchi pulp hardened in step 3 puts into 95 DEG C, 1%NaCl hot water blanching 2min.
Preferably, the airing in the sun of the litchi pulp in step 5, obtains the litchi pulp that moisture is reduced to less than 25%, cooling, packaging.
Beneficial effect of the present invention is:
The invention provides a kind of full appearance, dried litchi of good quality is easy to process; And processing cost is low, meets the processing needs in small business and family workshop, be conducive to lichee processing sell, increase economic results in society.
Lichee jerky plumpness of the present invention is good, and shape is even, and sweet acid is suitable for, lichee fragrance foot.
Detailed description of the invention
The invention discloses a kind of processing method of dried litchi, comprise the following steps and carry out successively,
Step one, chooses fresh, that meat is thick, core is little lichee, and through cleaning, peeling off, stoning obtains litchi pulp;
Step 2, puts into 0.2%NaHSO by described litchi pulp
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2-3 hour, the litchi pulp of by the time sclerosis;
Step 3, puts into 90 DEG C-100 DEG C hot water blanching 2-3min by the litchi pulp hardened in step 2; Taking-up normal temperature drains;
Step 4, puts into the freezer of-20-0 DEG C by the litchi pulp in step 3, use dehumidifier to reduce rapidly litchi pulp water activity lower than 0.6, and litchi pulp moisture is reduced to 50%, recover normal temperature; Step 5, puts into drying baker by the litchi pulp in step 4, adopts 50 DEG C, 1-2m/s hot-air seasoning 8-10 hour, obtains the litchi pulp of water content less than 25%, cooling, packaging.
The present invention is directed to preservation and freshness difficulty, brown stain and the serious problems that rot, full by obtaining a kind of pulp to lichee processing, shape is even, smoother taste, the dried litchi of instant.Meet growing lichee processing, store needs; Meet market sale demand.
Be described below in conjunction with the invention process.
Embodiment 1, choose local ripe, fresh lichee 10Kg, litchi meat is thick, and core is little, is applicable to doing dried litchi, without filling process, also can be shaped after drying.After treatment, plumpness is good, and in " lantern meat " shape, sweet acid is suitable for, lichee fragrance foot.Clean lichee, peel off, stoning obtains litchi pulp, litchi pulp ensures complete, not damaged.To litchi pulp cure process, litchi pulp is put into 0.2%NaHSO
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2 hours; The litchi pulp of sclerosis can ensure saccharification immediately and keep shape in drying, and ensures that preserved fruit is processed smoothly.To sclerosis litchi pulp blanching treatment, the litchi pulp of sclerosis party is put into 95 DEG C of hot water blanching 3min; Taking-up normal temperature drains.Blanching treatment can inactive enzyme active, prevent enzymatic browning; Stablize or improve color and luster; Reduce the pollutant in pulp and micro organism quantity.Litchi pulp after blanching is put into the freezer of 0 DEG C, use dehumidifier litchi pulp water activity to be reduced lower than 0.6 rapidly, and litchi pulp moisture is reduced to 40%, recover normal temperature.Finally, half-dried litchi pulp is put into drying baker, adopt 50 DEG C, 1m/s hot-air seasoning 10 hours, obtain the litchi pulp of water content 25%, cooling, packaging.
Embodiment 2, choose local ripe, fresh lichee 10Kg, litchi meat is thick, and core is little, is applicable to doing dried litchi, without filling process, also can be shaped after drying.After treatment, plumpness is good, and in " lantern meat " shape, sweet acid is suitable for, lichee fragrance foot.Clean lichee, peel off, stoning obtains litchi pulp, litchi pulp ensures complete, not damaged.To litchi pulp cure process, litchi pulp is put into 0.2%NaHSO
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2 hours; The litchi pulp of sclerosis can ensure saccharification immediately and keep shape in drying, and ensures that preserved fruit is processed smoothly.To sclerosis litchi pulp blanching treatment, the litchi pulp of sclerosis party is put into 90 DEG C of hot water blanching 3min; Taking-up normal temperature drains.Blanching treatment can inactive enzyme active, prevent enzymatic browning; Stablize or improve color and luster; Reduce the pollutant in pulp and micro organism quantity.Litchi pulp after blanching is put into the freezer of-10 DEG C, use dehumidifier to reduce rapidly litchi pulp water activity lower than 0.6, and litchi pulp moisture is reduced to 35%, recover normal temperature.Finally, half-dried litchi pulp is put into drying baker, adopt 50 DEG C, 1.5m/s hot-air seasoning 8 hours, obtain the litchi pulp of water content 24%, cooling, packaging.
Embodiment 3, choose local ripe, fresh lichee 10Kg, litchi meat is thick, and core is little, is applicable to doing dried litchi, without filling process, also can be shaped after drying.After treatment, plumpness is good, and in " lantern meat " shape, sweet acid is suitable for, lichee fragrance foot.Clean lichee, peel off, stoning obtains litchi pulp, litchi pulp ensures complete, not damaged.To litchi pulp cure process, litchi pulp is put into 0.2%NaHSO
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2 hours; The litchi pulp of sclerosis can ensure saccharification immediately and keep shape in drying, and ensures that preserved fruit is processed smoothly.95 DEG C, 1%NaCl hot water blanching 2min are put into the litchi pulp of sclerosis; Taking-up normal temperature drains.Blanching treatment can inactive enzyme active, prevent enzymatic browning; Stablize or improve color and luster; Reduce the pollutant in pulp and micro organism quantity.Litchi pulp after blanching is put into the freezer of-15 DEG C, use dehumidifier to reduce rapidly litchi pulp water activity lower than 0.6, and litchi pulp moisture is reduced to 30%, recover normal temperature.Finally, by the airing in the sun of half-dried litchi pulp, obtain the litchi pulp that moisture is reduced to 20%, cooling, packaging.
The lichee preserved fruit processed above-described embodiment carries out profile and mouthfeel etc. and distinguishes.
As from the foregoing, obtain dried litchi plumpness by the present invention's processing good, can be " lantern meat " shape, sweet acid be suitable for, lichee fragrance foot.The invention provides a kind of full appearance, dried litchi of good quality is easy to process; And processing cost is low, meets the processing needs in small business and family workshop, be conducive to lichee processing sell, increase economic results in society.
Claims (3)
1. a processing method for dried litchi, is characterized in that: comprise the following steps and carry out successively,
Step one, chooses fresh, that meat is thick, core is little lichee, and through cleaning, peeling off, stoning obtains litchi pulp;
Step 2, puts into 0.2%NaHSO by described litchi pulp
3, 0.1% citric acid, 0.2%CaCl
2the aqueous solution in, soak 2-3 hour, the litchi pulp of by the time sclerosis;
Step 3, puts into 90 DEG C-100 DEG C hot water blanching 2-3min by the litchi pulp hardened in step 2; Taking-up normal temperature drains;
Step 4, puts into the freezer of-20-0 DEG C by the litchi pulp in step 3, use dehumidifier to reduce rapidly litchi pulp water activity lower than 0.6, and litchi pulp moisture is reduced to less than 50%, recover normal temperature;
Step 5, puts into drying baker by the litchi pulp in step 4, adopts 50 DEG C, 1-2m/s hot-air seasoning 8-10 hour, obtains the litchi pulp of water content less than 25%, cooling, packaging.
2. the processing method of a kind of dried litchi according to claim 1, is characterized in that: the litchi pulp hardened in step 3 puts into 95 DEG C, 1%NaCl hot water blanching 2min.
3. the processing method of a kind of dried litchi according to claim 1, is characterized in that: the airing in the sun of the litchi pulp in step 5, obtains the litchi pulp that moisture is reduced to less than 25%, cooling, packaging.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107822163A (en) * | 2017-09-29 | 2018-03-23 | 广西广投干制农业科技有限公司 | Nucleus product technique is stayed in a kind of longan peeling |
CN113453562A (en) * | 2019-02-26 | 2021-09-28 | 松下知识产权经营株式会社 | Method for drying food, refrigerator, storage, and method for producing dried food |
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CN1403004A (en) * | 2002-09-30 | 2003-03-19 | 华南农业大学 | Production process of dewatered litchi pulp |
CN101300999A (en) * | 2008-07-01 | 2008-11-12 | 茂名学院 | Method for processing dried lichee with elementary color |
CN101411355A (en) * | 2008-11-28 | 2009-04-22 | 华南理工大学 | Method for processing dried lichee and dried longan |
CN102342457A (en) * | 2011-09-28 | 2012-02-08 | 福建农林大学 | Processing method for drying litchi pulp and longan pulp |
CN102715469A (en) * | 2012-06-26 | 2012-10-10 | 广西名香园食品有限公司 | Dried litchi processing method |
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2015
- 2015-06-11 CN CN201510318893.9A patent/CN104970311A/en active Pending
Patent Citations (5)
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CN1403004A (en) * | 2002-09-30 | 2003-03-19 | 华南农业大学 | Production process of dewatered litchi pulp |
CN101300999A (en) * | 2008-07-01 | 2008-11-12 | 茂名学院 | Method for processing dried lichee with elementary color |
CN101411355A (en) * | 2008-11-28 | 2009-04-22 | 华南理工大学 | Method for processing dried lichee and dried longan |
CN102342457A (en) * | 2011-09-28 | 2012-02-08 | 福建农林大学 | Processing method for drying litchi pulp and longan pulp |
CN102715469A (en) * | 2012-06-26 | 2012-10-10 | 广西名香园食品有限公司 | Dried litchi processing method |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107822163A (en) * | 2017-09-29 | 2018-03-23 | 广西广投干制农业科技有限公司 | Nucleus product technique is stayed in a kind of longan peeling |
CN107822163B (en) * | 2017-09-29 | 2019-05-31 | 广西广投干制农业科技有限公司 | Nucleus product technique is stayed in a kind of longan peeling |
CN113453562A (en) * | 2019-02-26 | 2021-09-28 | 松下知识产权经营株式会社 | Method for drying food, refrigerator, storage, and method for producing dried food |
CN113453562B (en) * | 2019-02-26 | 2024-06-04 | 松下知识产权经营株式会社 | Method for drying food, refrigerator, storage, and method for producing dried food |
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Application publication date: 20151014 |