CN101911964A - Baking method of dried longans - Google Patents
Baking method of dried longans Download PDFInfo
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- CN101911964A CN101911964A CN2010102205188A CN201010220518A CN101911964A CN 101911964 A CN101911964 A CN 101911964A CN 2010102205188 A CN2010102205188 A CN 2010102205188A CN 201010220518 A CN201010220518 A CN 201010220518A CN 101911964 A CN101911964 A CN 101911964A
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- drying room
- longan
- heating
- baking method
- dried
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Abstract
The invention relates to a baking method of dried longans, relating to longans. The baking method comprises the following steps of: heating heat transfer oil and pressurizing; carrying out heat exchange on the heated and pressurized heat transfer oil under the actions of a radiator and an air shaft pressurization fan in an oil-gas exchange box, leading heated air to enter a drying room and baking the longans for the first time, then clearing up and classifying the longans, and then entering the drying room and baking for the second time so as to ensure that the water content of the dried longans is controlled to be 19.5-23 percent. Due to the adoption of the heating of the heat transfer oil, the pressurization by a booster pump and the introduction of the heat transfer oil into an oil-gas heat exchange box through a pipeline, diesel oil is prevented from directly contacting the longans, thereby reducing pollution; the heated air is recycled through the pipeline, thereby simplifying equipment, reducing energy consumption and improving baking efficiency; meanwhile, the heated temperature and the pressurized pressure are convenient to control. Because of selecting reasonable heated temperature and the pressurized pressure and setting reasonable track cycle processing line, heating temperature, heating time and process conditions, the invention can guarantee the product quality, save labor and time and improve the production efficiency and can be used for cycle operation.
Description
Technical field
The present invention relates to a kind of longan (longan), especially relate to a kind of baking method of dried longan.
Background technology
Longan is the treasure in the fruit, is subjected to liking of the common people deeply, and often edible longan has certain heart tonifying and tranquilizing, a function such as the beneficial spleen that nourishes blood.
Publication number provides a kind of manufacture method of clean dried longan for the application for a patent for invention of CN1306763, be that the graininess longan fruit that beta pruning is finished gives the step that completes that scald in water temperature 85～95 ℃ of rivers Celsius earlier, and after cooling step rapidly with high temperature longan fruit instantaneous temperature reduction, the rubbing down step is smooth with its shell rubbing down again, then with heat of steam baking longan fruit 20～30h Celsius 55～65 ℃, rolled stir after, continuous with steam continuation heat baking 20～30h Celsius 45～55 ℃, the finished product of being finished can grade with screening according to the weight grading mode.Get dried longan shell clean hygiene therefrom and be not with lime stone, and the fruit suppleness is good.
Do, the method for dried longan by a kind of low-temperature vacuum drying roasting lichee for the patent of invention of CN1320383 provides for notification number; selective maturation fresh lichee, longan fruit; after 105～120 ℃ of steams complete; in vacuum is under 0.08～0.099MPa negative pressure, 50～70 ℃ of conditions of temperature; after 8～24h baking, roasting becomes the pulp outward appearance to be dried, the dried longan of lichee golden yellow, translucent, the strong former fruit local flavor of protection.The low-temperature vacuum drying technology is adopted in this invention, the lichee that roasting is gone out is done, longan is golden yellow, translucent in the pulp profile, and keeps strong former fruit local flavor, is upgraded product, can satisfy the more and more higher consumption demand of people, promote the development of lichee, longan processing industry.
Notification number provides the roasting store method of a kind of semi-dried dried lichee, dried longan for the patent of invention of CN1385080, and the lichee of the fresh no disease and pest of selective maturation, longan fresh fruit be through cleaning, drain, and through S0
2Fumigation completes, and dries to water content 25%～70%, carries out Vacuum Package with vacuum cooking bag film or other container, seals preservation.This invention increases the product water content, keeps former fruit local flavor substantially, and mouthfeel is sharp and clear, and instant value is high, and market prospects are wide.And adopt sterilization to pack, and in the preservation process, there is not infested, mouldy risk, be more convenient for preserving transportation and sale.
Summary of the invention
The object of the present invention is to provide a kind of baking method of improved dried longan.
The present invention includes following steps:
1) with heat-conducting oil heating and pressurization;
2) will carry out heat exchange under the effect of radiator and air last item blower fan in the oil gas commuting case through the conduction oil of heating and pressurization, air enters drying room after heating, longan is carried out curing the first time;
3) will put in order and classification through the dried longan that cures for the first time, and enter drying room again and carry out curing the second time, and make the dried longan water content be controlled at 19.5%～23%, yellowish pink golden yellow---pale red, pack enters freezes storehouse or warehouse.
In step 1), described heating can adopt boiler to heat, and the temperature of heating can be 140～240 ℃; Described pressurization can be adopted the force (forcing) pump pressurization, imports the oil gas heat exchange case from pipeline again, and the pressure of pressurization can be 0.5～1.0MPa.
In step 2) in, described air enters drying room after heating, and preferably air enters drying room after being heated to 50～85 ℃; Described drying room, can be designed to track cycle processing line, described track cycle processing line can be made up of 8～16 layering handcarts, when the hot blast that is heated to 50～85 ℃ enters in the drying room, through 12～16h, longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification, again through 0.5～2h, longan on second handcart can take out arrangement, when taking out a handcart, behind drying room, advance next handcart, so cycle operation.
In step 3), the described drying room that enters again carries out curing the second time, preferably will through the dried longan that cures for the first time put in order and classification after 6～12h, enter drying room again and carry out secondary and cure; Described pack enters freezes storehouse or warehouse, be preferably in pack and enter and freeze behind storehouse or the warehouse mass dryness fraction of testing product regularly, described regular detection, but jede Woche detect once, in case rotten.
Because the present invention adopts boiler that conduction oil is heated, the pressurization of employing force (forcing) pump, import the oil gas heat exchange case from pipeline again, therefore can avoid diesel oil directly to contact with longan, reduce pollution, the air of heating recycles by pipeline, simplified equipment, reduced energy consumption, improved baking efficiency, the pressure of Jia Re temperature and pressurization control simultaneously is convenient.Owing to select reasonable heated temperature and moulding pressure for use, therefore can guarantee the quality of product.Owing to will in the oil gas commuting case, under the effect of radiator and air last item blower fan, carry out heat exchange through the conduction oil of heating and pressurization, air enters drying room after heating, longan is carried out curing the first time, and be provided with reasonable track cycle processing line, heating-up temperature and time, and process conditions, therefore not only can guarantee the quality of product, and can save manpower and time, enhance productivity, and can carry out cycle operation.Owing to adopt the secondary baking process, therefore be convenient to control the water content of dried longan, obviously improve product quality.
The specific embodiment
Following examples will the present invention is further illustrated.
Embodiment 1
1) adopt boiler that conduction oil is heated, the temperature of heating is 140～160 ℃; Adopt the force (forcing) pump pressurization again, and import the oil gas heat exchange case from pipeline, the pressure of pressurization is 0.8～0.9MPa.
2) will in the oil gas commuting case, under the effect of radiator and air last item blower fan, carry out heat exchange through the conduction oil of heating and pressurization, air enters drying room after being heated to 70～75 ℃, drying room can be designed to track cycle processing line, described track cycle processing line can be made up of 8～16 layering handcarts, when the hot blast that is heated to 70～75 ℃ enters in the drying room, through 14h, longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification, again through 0.5～2h, the longan on second handcart can take out arrangement, when taking out a handcart, behind drying room, advance next handcart, so cycle operation.
3) will through the dried longan that cures for the first time put in order and classification after 6～12h, entering drying room again carries out secondary and cures, make the dried longan water content be controlled at 19.5%～23%, yellowish pink golden yellow---pale red, pack enters and freezes storehouse or warehouse, pack enter freeze storehouse or warehouse after the regular mass dryness fraction of testing product, described regular detection, but jede Woche detects once, in case rotten.
Embodiment 2
Similar to Example 1, its difference is that the temperature that adopts boiler that conduction oil is heated is 170～180 ℃; Adopting the pressure of force (forcing) pump pressurization again is 0.9～1MPa.Air enters drying room after being heated to 65～70 ℃, through 13h, the longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification.
Embodiment 3
Similar to Example 1, its difference is that the temperature that adopts boiler that conduction oil is heated is 185～195 ℃; Adopting the pressure of force (forcing) pump pressurization again is 0.6～0.7MPa.Air enters drying room after being heated to 80～85 ℃, through 12h, the longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification.
Embodiment 4
Similar to Example 1, its difference is that the temperature that adopts boiler that conduction oil is heated is 200～210 ℃; Adopting the pressure of force (forcing) pump pressurization again is 0.7～0.8MPa.Air enters drying room after being heated to 50～60 ℃, through 16h, the longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification.
Embodiment 5
Similar to Example 1, its difference is that the temperature that adopts boiler that conduction oil is heated is 220～240 ℃; Adopting the pressure of force (forcing) pump pressurization again is 0.5～0.6MPa.Air enters drying room after being heated to 60～65 ℃, through 15h, the longan on first handcart can reach 5～8 one-tenth mass dryness fractions, can take out and carry out debranching arrangement and classification.
Claims (8)
1. the baking method of dried longan is characterized in that may further comprise the steps:
1) with heat-conducting oil heating and pressurization;
2) will carry out heat exchange under the effect of radiator and air last item blower fan in the oil gas commuting case through the conduction oil of heating and pressurization, air enters drying room after heating, longan is carried out curing the first time;
3) will put in order and classification through the dried longan that cures for the first time, and enter drying room again and carry out curing the second time, and make the dried longan water content be controlled at 19.5%～23%, yellowish pink golden yellow---pale red, pack enters freezes storehouse or warehouse.
2. the baking method of dried longan as claimed in claim 1 is characterized in that in step 1), and described heating is to adopt boiler to heat, and the temperature of heating is 140～240 ℃.
3. the baking method of dried longan as claimed in claim 1 is characterized in that in step 1), and described pressurization is to adopt the force (forcing) pump pressurization, imports the oil gas heat exchange case from pipeline again, and the pressure of pressurization is 0.5～1.0MPa.
4. the baking method of dried longan as claimed in claim 1 is characterized in that in step 2) in, described air enters drying room after heating, be that air enters drying room after being heated to 50～85 ℃.
5. as the baking method of claim 1 or 4 described dried longans, it is characterized in that in step 2) in, described drying room, be designed to track cycle processing line, described track cycle processing line is made up of 8～16 layering handcarts, when the hot blast that is heated to 50～85 ℃ enters in the drying room, through 12～16h, longan on first handcart reaches 5～8 one-tenth mass dryness fractions, takes out and carries out debranching arrangement and classification, again through 0.5～2h, longan on second handcart takes out arrangement, when taking out a handcart, behind drying room, advance next handcart, so cycle operation.
6. the baking method of dried longan as claimed in claim 1 is characterized in that in step 3), and the described drying room that enters again carries out curing the second time, be with put in order through the dried longan that cures for the first time and classification after 6～12h, enter drying room again and carry out secondary and cure.
7. the baking method of dried longan as claimed in claim 1 is characterized in that in step 3), and described pack enters freezes storehouse or warehouse, be pack enter freeze storehouse or warehouse after the regular mass dryness fraction of testing product.
8. the baking method of dried longan as claimed in claim 7 is characterized in that in step 3), and described regular detection is that jede Woche detects once, in case rotten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102205188A CN101911964B (en) | 2010-07-01 | 2010-07-01 | Baking method of dried longans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102205188A CN101911964B (en) | 2010-07-01 | 2010-07-01 | Baking method of dried longans |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101911964A true CN101911964A (en) | 2010-12-15 |
| CN101911964B CN101911964B (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102205188A Expired - Fee Related CN101911964B (en) | 2010-07-01 | 2010-07-01 | Baking method of dried longans |
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| Country | Link |
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| CN (1) | CN101911964B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075880A1 (en) * | 2010-12-09 | 2012-06-14 | 厦门亦坤果蔬专业合作社 | Method for making salty dried longan |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306763A (en) * | 2000-01-21 | 2001-08-08 | 林亮 | Production process of clean dried longan |
| CN2586948Y (en) * | 2002-11-20 | 2003-11-19 | 华南农业大学 | Heat and cold wind drying apparatus for farm and side line product |
| CN2735265Y (en) * | 2004-08-06 | 2005-10-19 | 龚日照 | Gas type hot-air drying furnace |
| CN201365509Y (en) * | 2008-12-26 | 2009-12-23 | 湖南唐人神肉制品有限公司 | Drying house for automatically controlling dehydration and drying of food |
-
2010
- 2010-07-01 CN CN2010102205188A patent/CN101911964B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306763A (en) * | 2000-01-21 | 2001-08-08 | 林亮 | Production process of clean dried longan |
| CN2586948Y (en) * | 2002-11-20 | 2003-11-19 | 华南农业大学 | Heat and cold wind drying apparatus for farm and side line product |
| CN2735265Y (en) * | 2004-08-06 | 2005-10-19 | 龚日照 | Gas type hot-air drying furnace |
| CN201365509Y (en) * | 2008-12-26 | 2009-12-23 | 湖南唐人神肉制品有限公司 | Drying house for automatically controlling dehydration and drying of food |
Non-Patent Citations (3)
| Title |
|---|
| 《农业工程学报》 19920630 傅坤仁 桂元干的工厂化生产 107-113 1-8 第8卷, 第2期 2 * |
| 《广西热作科技》 19981231 刘功德 等 脱水桂圆肉加工技术中试 1-5 1-8 , 第1期 2 * |
| 《广西热带农业》 20061231 叶雪英 龙眼干果热风分段烘干工艺 20-21 1-8 , 第6期 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075880A1 (en) * | 2010-12-09 | 2012-06-14 | 厦门亦坤果蔬专业合作社 | Method for making salty dried longan |
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| Publication number | Publication date |
|---|---|
| CN101911964B (en) | 2012-11-07 |
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