CN105595244A - Preparation method of high-purity instant fruit powder - Google Patents
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Abstract
The invention relates to a preparation method of high-purity instant fruit powder. The preparation method comprises steps as follows: raw materials are screened, washed, peeled, subjected to stone removal, pulped, subjected to enzymolysis, filtered, concentrated and mixed, the wall of a spray drying tower is rotationally blown and swept by dedusted clean air in the drying process, dry fruit powder output by the spray drying tower is conveyed to a material collection cylinder through dehumidified clean air, the purity of the fruit powder can reach 80%-90% on a dry matter basis, and the solubility is higher than or equal to 95%. Compared with an existing fruit powder preparation method adopting a spray drying technique, the provided preparation method of the instant fruit powder has the advantages that the quantity of added auxiliaries is remarkably reduced, the purity of the product is remarkably improved, and the purity and the nutritional ingredients of the fruit powder are guaranteed. The state of the dissolved fruit powder is uniform, the flavor is strong and mellow, the moisture content of the product is low, and the storage time is prolonged.
Description
Technical field
The preparation method who the present invention relates to a kind of high purity instant fruit powder, belongs to food processing technology field.
Background technology
Fruit powder is by fruit convection drying or interpolation auxiliary material is dry forms, and can be used as solid beverage and directly drinks, or add as auxiliary materialBe added in numerous food product. Traditional fruit powder preparation method is taked dry process more, i.e. the first heated-air drying dehydration of raw material, and then powderBroken method. The fruit powder product particle of producing is thick, poorly soluble, and when powder process because mechanical friction causes processing temperature mistakeHeight, nutritional labeling and the local flavor of destruction product. Wet processing, raw material is first pulled an oar, after homogeneous, spray again dry, althoughCan solve to a certain extent dry production problem, but still there is no thoroughly to solve the not good problem of product quality. Spraying is dry suitableClose in the liquid material of dry high juice content, because material heating temperature is low, the time is short, can retain preferably the nutrition of materialAnd flavor components. But when the dry preparation fruit of spraying powder, also have certain drawback, because sugar content in fruits and vegetables is high, the viscosity of feed liquidGreatly, the dry phenomenons such as sticky wall and plug nozzle that are easy to occur of directly spraying, fruit powder yield is low, poor quality, production efficiencyLow.
In order to improve the generation of this type of phenomenon, conventionally need add the drying aid of 40%-60%, drying aid is taking maltodextrin as main, auxiliaryHelp and add soluble starch, cyclodextrin etc. It is dry that patent application (CN101143019A) discloses the anti-stick wall spraying of a kind of controlThe preparation method of dry instant composite solid fruit and vegetable beverage, concentrated rear drying aid maltodextrin, the single drying aid of adding in the methodAnti-stick wall poor effect, flour extraction is low; Wang Zenan etc. (food industry science and technology, the 09th phase in 2006,117-119) study sprayWhen the dry strawberry powder of mist, strawberry solid content and drying aid ratio are 4:6, and drying aid, taking maltodextrin as main, also has ovum phosphorus in additionFat, cyclodextrin, soluble starch, spray effect is good, but local flavor, color and luster and the battalion of the maltodextrin of high-load to powder in fruit powderForm and point have a huge impact, its quality is reduced, limited its promotion and application.
In spray-drying process, the material being dried is bonded on drying tower inwall, is referred to as sticky wall, the material after sticky wall due toRest on for a long time on hot inwall, likely burnt or go bad, directly affect quality, nutritional labeling and the dissolubility of product,Spray dried material because sugar content is high, and the cooling rear easy moisture absorption of the material of high temperature, softening remelt, dissolve product cakingProperty.
In production real process, there are some technical barriers to have a strong impact on the stable of product quality, if the guarantor of powder product appearance color and lusterHold, pectin or cellulosic existence in raw material for another example, causes that product is poorly soluble etc. Therefore, how to adopt new production methodImproving apple powder product quality is a current production difficult problem urgently to be resolved hurrily.
The spraying of the Fruit powder such as red date, apple, matrimony vine, blueberry is dry exists auxiliary material addition large, spray process easily sticky wall,The problems such as caking, the process limitations of this type of Fruit powder, has limited the industrialized development of high purity instant fruit powder. Taking red date as example,Red date is the distinctive fruit of China, nearly 2,000 ten thousand mu of China's red date cultivated area in 2013, and output reaches 7,400,000 tons, specialBe that Xinjiang region cultivated area exceedes 6,000,000 mu, face the best fruiting period, red date output cumulative year after year, only depends on extra dry red wine jujube to sell at onceCan not meet the needs that output increases progressively, need deep processing and the product development of carrying out red date badly.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of preparation method of high purity instant fruit powder, it is instant that the present invention makesFruit powder purity is high, nutritional labeling loss is few, dispersed, instant capacity is good, and in the time reconstituting, structural state uniformity, instant capacity are good,The smell of fruits is very sweet.
Technical scheme of the present invention is as follows:
A preparation method for high purity instant fruit powder, comprises that step is as follows:
1) raw material cleans through screening respectively, peeling, stoning, and making beating, enzymolysis, filters, concentrated, makes inspissated juice;
2) in inspissated juice, add drying aid, described drying aid is maltodextrin, solid in maltodextrin addition and inspissated juiceThe mass ratio of shape thing is (1～3): (8～10); Must allocate rear pulp;
3) dry by spraying in pulp input spray-drying installation after allotment, 145～150 DEG C of spray-dired EATs,65～75 DEG C of leaving air temps, atomizer rotating speed 20000～25000r/min, feed rate 50～100mL/min, spraying is dryIn process, from the bottom of spray drying tower passes into dedusting, pure air rotates and purges spray drying tower tower wall, the temperature of pure airSpend 25～30 DEG C, pure air outlet pressure 30～50kPa, rotation purges rotating speed 1～5r/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 1～3wt%, 30～50 DEG C of temperature, it is 20-30m/s that the pure air after dehumidifying passes into speed,After sieving, the fruit powder that aggregate tube is collected obtains high purity instant fruit powder.
The present invention is preferred, step 1) described in raw material for without rotting, without pathology, bright-coloured fruit, preferred fruitFor red date, apple, matrimony vine or blueberry.
The present invention is preferred, step 1) described in making beating be the water of 1～5 times that adds material quality, boil 3～5min,Then carry out crushing and beating processing, making beating is put into centrifuge and is carried out centrifugal treating 3～5min, the rotating speed of described centrifuge3000rpm/min. Centrifugal treating is in order to remove the impurity such as pericarp, fruit stone in pulp.
The present invention is preferred, and described enzymolysis is for adding pulp enzyme to carry out enzymolysis, 50～55 DEG C of hydrolysis temperatures, and enzymolysis time 1～2h; The enzyme activity of pulp enzyme is 30,000～50,000 U/mL.
Further preferred, described pulp enzyme is pulp enzyme YieldMASH.
The present invention is preferred, step 1) described in be filtered into and adopt press type strainer filtering, filter screen order is counted 40-60 order.
The present invention is preferred, step 1) described in concentration process adopt cryogenic vacuum economic benefits and social benefits concentrate, concentrate conditionFor: one-level temperature is controlled at 65～70 DEG C, and secondary temperature is controlled at 55 DEG C, and vacuum degree control, at 0.07MPa, is worked as solid contentWhen reaching 25%～40%, content carries out discharging.
The present invention is preferred, step 2) in maltodextrin addition and inspissated juice the mass ratio of solid content be (1～1.5):(8.5～9)。
The present invention is preferred, step 3) in 26～28 DEG C of the temperature of pure air, pure air outlet pressure 35～42kPa,Rotation purges rotating speed 2～3r/min.
After dedusting pure air be adopt just, pure air after the dedusting of middle effect sack cleaner, dust collection method is all by prior artCarry out.
The present invention is preferred, step 3) spray dried fruit powder water content below 7%.
The present invention is preferred, step 4) in dehumidifying after pure air moisture content 1～2.5wt%, 42～46 DEG C of temperature, dehumidifyingAfter pure air to pass into speed be 22-26m/s.
After dehumidifying, dry air is carried, and for contact with fruit powder after dehumidifying and behind temperature control to 30～50 DEG C, reaches heat fruit powder and lowers the temperature coldThe object of but also carrying. High purity instant fruit powder provided by the invention, although spraying is dried EAT up to 150 DEG C, mistThe wet-bulb temperature dripping is lower, and powder heated time shorter (< 10s) adds that cold wind purges and carries, gained fruit powder nutritive lossLess.
Compared with prior art, the present invention has following useful technique effect:
The present invention adds auxiliary material maltodextrin in concentrated rear fruit juice to, has improved fruit juice soluble solid content, makes fruit juiceIn be difficult for dryly, easily the sugar of the moisture absorption is able to effective embedding, gained fruit powder instant capacity is good, good stability, uses warm water Instant Drinks,Dissolution time is no more than 10s. Meanwhile, the present invention carries out cold wind to the dry consequence powder of spraying and purges and cold wind transport process, significantlyDegree has reduced the addition of maltodextrin, and the fruit powder making unsuitable moisture absorption and caking in storage, reconstitutes performance good.
The above equipment of the present invention is this area conventional equipment.
Advantage of the present invention is as follows
1, all processing procedures of the present invention are low-temperature operation, have avoided the decomposition of the trophic factors that Yin Gaowen brings, and makeIn fruit, all nutrition is at utmost retained, and high through pulp enzymolysis gained juice yield, nutritional labeling loss is few.
2, method of the present invention pulp after allotment spray dry, in dry run, adopt dedusting after pure air to sprayingThe rotation of drying tower tower wall purges, and has avoided the bonding of fruit powder at spray inner wall of tower, has realized serialization and has produced not sticky wall, the fruit makingPowder do not lump, non-hygroscopic, tack-free, the storage time is long.
3, the present invention adds auxiliary material maltodextrin in concentrated rear fruit juice to, has improved fruit juice soluble solid content, makesIn fruit juice, be difficult for being dried, easily the sugar of the moisture absorption is able to effective embedding, and the pure air after dried fruit powder employing dehumidifying is delivered to and gathers materialsIn cylinder, effectively reduce jujube powder heating temperature and realized the low temperature of jujube powder and carry, avoided that jujube powder causes because temperature is high self is softChange and the phenomenon generation of secondary granulation, improve embedding effect, improve product water and disperse property, greatly improved instant capacity, preservedIn journey, unsuitable moisture absorption and caking, reconstitute performance good, and water dispersible is good, can dissolve rapidly without stirring, after dissolving, be homogeneous,Stable emulsion body.
4, technique gained jujube powder drying aid maltodextrin content of the present invention is starkly lower than the dry products obtained therefrom of common spraying; ObtainFruit powder instant capacity to be obviously better than common spraying dry.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but be not limited to this.
Following examples jujube raw material used originates from the grey jujube of Kashi, and equipment is centrifugal spray drying device.
Pulp enzyme YieldMASH is prior art, and letter (China) Bioisystech Co., Ltd of Novi is on sale.
Red date powder prepared by the embodiment of the present invention, for making solid beverage or numerous food batching.
Embodiment 1
Taking red date as example, a kind of preparation method of high purity instant red date powder, step is as follows:
1) take red date raw material 10kg, screen, clean, add the water boiling of 5 times of red date quality, boil 5min, broken beatingSlurry, puts into centrifuge and carries out centrifugal treating 5min, the rotating speed 3000rpm/min of centrifuge after making beating; Add pulp enzyme to carry outEnzymolysis, 54 DEG C of hydrolysis temperatures, enzymolysis time 1.5h; The enzyme activity of pulp enzyme is 50,000 U/mL. After enzymolysis, jujube slurry adopts squeezingFormula strainer filtering filters, and filter screen order number 50 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: oneLevel temperature is controlled at 65 DEG C, and secondary temperature is controlled at 55 DEG C, and vacuum degree control is at 0.07MPa, when solid content reaches 30%Shi Jinhang discharging, obtains the concentrated turbid juice 25.3kg of jujube;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 1.5: 8.5;Must allocate rear pulp; Obtain allocating rear red date slurry 26.5kg;
3) dry by spraying in pulp input spray-drying installation after allotment, 145 DEG C of spray-dired EATs, go out68 DEG C of air temperatures, atomizer rotating speed 20000r/min, feed rate 60mL/min, in spray-drying process from spray drying towerBottom pass into after dedusting pure air rotation purge to spray drying tower tower wall, 26 DEG C of the temperature of pure air, pure airOutlet pressure 36kPa, rotation purges rotating speed 2.5r/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 2wt%, 40 DEG C of temperature, it is 25m/s that the pure air after dehumidifying passes into speed, aggregate tube collectFruit powder obtain high purity instant fruit powder 4.3kg after sieving.
One, Quality Detection
Through detecting, the moisture of the high purity instant jujube powder of the inventive method gained is 5.1wt%, and total sugar content is80.6wt%, above-mentioned percentage all refers to percentage by weight. Jujube powder purity is 89.7%, and solubility reaches 97.8%.
Above-mentioned moisture method of testing is according to GB/T5009.3;
Above-mentioned total sugar content method of testing is according to GB/T15038.
Dissolve test
In order to verify the instant effect of jujube powder of the inventive method gained, choose at random the red date powder of selling on market, identicalUnder condition, carry out solute effect contrast test, by commercially available red date packed with the 5g randomly drawing the red date powder of this explained hereafter of 5gPowder carries out solubility experiment, and two kinds of products are dissolved in respectively in the hot water of 80 DEG C of 100ml, temperature to be observed, and through contrast, finds thisThe Instant Jujube Powder solute effect of invention is good, dissolve rapidly, with 100 order stainless steel sifts under the same conditions by two kinds of solution mistakesFilter, dry to constant weight weighing, commercially available jujube powder slightly solubility material reaches 9.7%, and this technique jujube powder slightly solubility material only has 2.2%,Instant Jujube Powder state homogeneous after dissolving, has strong jujube Flavor, pure taste.
Embodiment 2:
Taking red date as example, a kind of preparation method of high purity instant red date powder, step is as follows:
1) take red date raw material 40kg, screen, clean, add the water boiling of 4 times of red date quality, boil 5min, broken beatingSlurry, puts into centrifuge and carries out centrifugal treating 4min, the rotating speed 3000rpm/min of centrifuge after making beating; Add pulp enzyme to carry outEnzymolysis, 52 DEG C of hydrolysis temperatures, enzymolysis time 1.5h; The enzyme activity of pulp enzyme is 40,000 U/mL. After enzymolysis, jujube slurry adopts squeezingFormula strainer filtering filters, and filter screen order number 50 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: oneLevel temperature is controlled at 68 DEG C, and secondary temperature is controlled at 55 DEG C, and vacuum degree control is at 0.07MPa, when solid content reaches 35%Shi Jinhang discharging, obtains the concentrated turbid juice 99.6kg of jujube;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 1.5: 9;Must allocate rear pulp; Obtain allocating rear red date slurry 108.4kg;
3) dry by spraying in pulp input spray-drying installation after allotment, 148 DEG C of spray-dired EATs, go out70 DEG C of air temperatures, atomizer rotating speed 25000r/min, feed rate 80mL/min, in spray-drying process from spray drying towerBottom pass into after dedusting pure air rotation purge to spray drying tower tower wall, 28 DEG C of the temperature of pure air, pure airOutlet pressure 42kPa, rotation purges rotating speed 2r/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 2wt%, 40 DEG C of temperature, it is 25m/s that the pure air after dehumidifying passes into speed, aggregate tube collectFruit powder obtain high purity instant fruit powder 17.1kg after sieving.
Comparative example 1
Taking red date as example, a kind of preparation method of red date powder, step is as follows:
1) take red date raw material, screen, clean, add the water boiling of 5 times of red date quality, boil 5min, crushing and beating,After making beating, put into centrifuge and carry out centrifugal treating 4min, the rotating speed 3000rpm/min of centrifuge; Add pulp enzyme to carry out enzymolysis,52 DEG C of hydrolysis temperatures, enzymolysis time 1.5h; The enzyme activity of pulp enzyme is 40,000 U/mL. After enzymolysis, jujube slurry adopts press type filter screenFiltration is filtered, and filter screen order number 50 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: one-level temperatureBe controlled at 65 DEG C, secondary temperature is controlled at 55 DEG C, and vacuum degree control, at 0.07MPa, is entered in the time that solid content reaches 30%Row discharging, obtains the concentrated turbid juice of jujube;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 1.5: 8.5;Must allocate rear pulp; Obtain allocating rear red date slurry;
3) dry by spraying in pulp input centrifugal spray drying device after allotment, 145 DEG C of spray-dired EATs,68 DEG C of leaving air temps, atomizer rotating speed 20000r/min, feed rate 60mL/min, obtains dried fruit powder;
4) dried fruit powder is directly inputted and is entered aggregate tube, after the fruit powder of collection sieves, obtains red date powder, and this red date powder is for experimentExample contrast.
Comparative example 2
1) take red date raw material 10kg, screen, clean, add the water boiling of 5 times of red date quality, boil 5min, broken beatingSlurry, puts into centrifuge and carries out centrifugal treating 5min, the rotating speed 3000rpm/min of centrifuge after making beating; Add pulp enzyme to carry outEnzymolysis, 54 DEG C of hydrolysis temperatures, enzymolysis time 1.5h; The enzyme activity of pulp enzyme is 50,000 U/mL. After enzymolysis, jujube slurry adopts squeezingFormula strainer filtering filters, and filter screen order number 50 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: oneLevel temperature is controlled at 65 DEG C, and secondary temperature is controlled at 55 DEG C, and vacuum degree control is at 0.07MPa, when solid content reaches 30%Shi Jinhang discharging, obtains the concentrated turbid juice 25.3kg of jujube;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 1.5: 8.5;Must allocate rear pulp; Obtain allocating rear red date slurry 26.5kg;
3) dry by spraying in pulp input spray-drying installation after allotment, 145 DEG C of spray-dired EATs, go out68 DEG C of air temperatures, atomizer rotating speed 20000r/min, feed rate 60mL/min, in spray-drying process from spray drying towerBottom pass into after dedusting pure air rotation purge to spray drying tower tower wall, 26 DEG C of the temperature of pure air, pure airOutlet pressure 36kPa, rotation purges rotating speed 2.5r/min, obtains dried fruit powder;
4) dried fruit powder is directly inputted and is entered aggregate tube, after the fruit powder of collection sieves, obtains red date powder. This red date powder is for experimentExample contrast.
Comparative example 3
Taking red date as example, a kind of preparation method of red date powder, step is as follows:
1) take red date raw material, screen, clean, add the water boiling of 5 times of red date quality, boil 5min, crushing and beating,After making beating, put into centrifuge and carry out centrifugal treating 4min, the rotating speed 3000rpm/min of centrifuge; Add pulp enzyme to carry out enzymolysis,52 DEG C of hydrolysis temperatures, enzymolysis time 1.5h; The enzyme activity of pulp enzyme is 40,000 U/mL. After enzymolysis, jujube slurry adopts press type filter screenFiltration is filtered, and filter screen order number 50 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: one-level temperatureBe controlled at 65 DEG C, secondary temperature is controlled at 55 DEG C, and vacuum degree control, at 0.07MPa, is entered in the time that solid content reaches 30%Row discharging, obtains the concentrated turbid juice of jujube;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 1.5: 8.5;Must allocate rear pulp; Obtain allocating rear red date slurry;
3) dry by spraying in pulp input centrifugal spray drying device after allotment, 145 DEG C of spray-dired EATs,68 DEG C of leaving air temps, atomizer rotating speed 20000r/min, feed rate 60mL/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 2wt%, 40 DEG C of temperature, it is 25m/s that the pure air after dehumidifying passes into speed, aggregate tube collectFruit powder obtain red date powder after sieving. This red date powder is for experimental example contrast.
Experimental example
1, the dry red date powder of preparing of spraying under the same conditions, the red date powder of embodiment of the present invention method through cold wind purge,Carry the jujube powder of gained jujube powder and comparative example 1-3 acquisition to contrast, the water content of red date powder, jujube powder purity, dissolved property rightThan result as following table 1.
Table 1
2, the present invention is prepared in red date powder process, and the dried fruit powder of spray drying tower output adopts the pure air after dehumidifying to carryTo aggregate tube, water content and the Product Status of the temperature of the dehumidified air of conveying to product has obvious difference, removes by changeTemperature and the water content of the pure air after wet, the red date powder making contrast is shown in Table 2:
Table 2
| Pure air after dehumidifying | Pure air water content after dehumidifying | Jujube powdery state |
| 10℃ | 6.1wt％ | Water content is high, sticky wall, and powder easily lumps |
| 20℃ | 5.8wt％ | Water content is high, slightly sticky wall, and powder easily lumps |
| 30℃ | 5.6wt％ | Water content is higher, slightly sticky wall |
| 40℃ | 5.1wt％ | Without sticky wall, powder fluidity is good |
| 50℃ | 4.9wt％ | Without sticky wall, powder has slight caking |
| 60℃ | 5.0wt％ | Slight sticky wall, powder slightly lumps |
| 70℃ | 4.8wt％ | Obviously sticky wall, powder agglomeration is serious |
Conclusion: can find out by the data in table 2, the present invention is prepared in red date powder process, the temperature that clean dehumidified air is carriedOn the Product Status impact of jujube powder significantly, when its temperature, to be controlled at 30～50 DEG C of effects better for degree, and gained jujube powder moisture is low,Good fluidity, not sticky wall, does not lump. The preparation method of instant red date powder provided by the invention, with existing spray drying technologyThe preparation method of red date powder compares, and auxiliary material addition obviously reduces, and product purity obviously improves (improving nearly 40 percentage points),Purity and the nutritional labeling of red date powder are ensured. Jujube powdery state homogeneous after dissolving, with rich flavor, and product moisture content is low, prolongsGrow storage time.
Consolidated statement 1, table 2 can find out, in dry run of the present invention, adopt dedusting after pure air spray drying tower tower wall is revolvedTurn purging, adopt the pure air after dehumidifying to be delivered in aggregate tube in conjunction with the dried fruit powder of spray drying tower output, the fruit makingPowder do not lump, non-hygroscopic, the phenomenon of self softening secondary granulation of having avoided that jujube powder causes because temperature is high occurs, and improves embeddingEffect, improves product water dispersion property, has greatly improved instant capacity, and in storage, unsuitable moisture absorption and caking, reconstitute performance good,Water dispersible is good, can dissolve rapidly without stirring, and after dissolving, is homogeneous, stable emulsion body.
Embodiment 3:
Taking blueberry as example, a kind of preparation method of high purity instant blueberry powder, step is as follows:
1) take blueberry raw material 10kg, screen, clean, add the water boiling of 2 times of blueberry quality, boil 3min, broken beatingSlurry, puts into centrifuge and carries out centrifugal treating 4min, the rotating speed 3000rpm/min of centrifuge after making beating; Add pulp enzyme to carry outEnzymolysis, 52 DEG C of hydrolysis temperatures, enzymolysis time 1h; The enzyme activity of pulp enzyme is 30,000 U/mL. After enzymolysis, blueberry slurry adopts squeezingFormula strainer filtering filters, and filter screen order number 40 orders adopt cryogenic vacuum economic benefits and social benefits to concentrate, and concentrated condition is: oneLevel temperature is controlled at 66 DEG C, and secondary temperature is controlled at 55 DEG C, and vacuum degree control is at 0.07MPa, when solid content reaches 35%Shi Jinhang discharging, obtains the concentrated turbid juice 23.8kg of blueberry;
2) in inspissated juice, add maltodextrin, in maltodextrin addition and inspissated juice, the mass ratio of solid content is 2: 10;Must allocate rear pulp; Obtain allocating rear blueberry slurry 24.6kg;
3) dry by spraying in pulp input spray-drying installation after allotment, 145 DEG C of spray-dired EATs, go out65 DEG C of air temperatures, atomizer rotating speed 20000r/min, feed rate 50mL/min, in spray-drying process from spray drying towerBottom pass into after dedusting pure air rotation purge to spray drying tower tower wall, 22 DEG C of the temperature of pure air, pure airOutlet pressure 32kPa, rotation purges rotating speed 2.5r/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 1.5wt%, 36 DEG C of temperature, it is 25m/s that the pure air after dehumidifying passes into speed, aggregate tube receiveAfter sieving, the fruit powder of collection obtains high purity instant fruit powder 6.1kg.
Claims (10)
1. a preparation method for high purity instant fruit powder, comprises that step is as follows:
1) raw material cleans through screening respectively, peeling, stoning, and making beating, enzymolysis, filters, concentrated, makes inspissated juice;
2) in inspissated juice, add drying aid, described drying aid is maltodextrin, solid in maltodextrin addition and inspissated juiceThe mass ratio of shape thing is (1～3): (8～10); Must allocate rear pulp;
3) dry by spraying in pulp input spray-drying installation after allotment, 145～150 DEG C of spray-dired EATs,65～75 DEG C of leaving air temps, atomizer rotating speed 20000～25000r/min, feed rate 50～100mL/min, spraying is dryIn process, from the bottom of spray drying tower passes into dedusting, pure air rotates and purges spray drying tower tower wall, the temperature of pure airSpend 25～30 DEG C, pure air outlet pressure 30～50kPa, rotation purges rotating speed 1～5r/min, obtains dried fruit powder;
4) adopt the pure air dehumidifying to be delivered in aggregate tube from the dried fruit powder of spray drying tower output, described dehumidifyingAfter pure air moisture content 1～3wt%, 30～50 DEG C of temperature, it is 20-30m/s that the pure air after dehumidifying passes into speed,After sieving, the fruit powder that aggregate tube is collected obtains high purity instant fruit powder.
2. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 1) described inRaw material for without rotting, without pathology, bright-coloured fruit, fruit is red date, apple, matrimony vine or blueberry.
3. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 1) described inMaking beating be the water of 1～5 times that adds material quality, boil 3～5min, then carry out crushing and beating processing, making beating is put intoIn centrifuge, carry out centrifugal treating 3～5min, the rotating speed 3000rpm/min of described centrifuge.
4. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that, described enzymolysis is for addingEnter pulp enzyme and carry out enzymolysis, 50～55 DEG C of hydrolysis temperatures, enzymolysis time 1～2h; The enzyme activity of pulp enzyme is 30,000～50,000U/mL。
5. the preparation method of high purity instant fruit powder according to claim 4, is characterized in that, described pulp enzyme is fruitSlurry enzyme YieldMASH.
6. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 1) described inBe filtered into and adopt press type strainer filtering, filter screen order is counted 40-60 order.
7. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 1) described inThe cryogenic vacuum economic benefits and social benefits that concentration process adopts concentrate, and concentrated condition is: one-level temperature is controlled at 65～70 DEG C, secondaryTemperature is controlled at 55 DEG C, and vacuum degree control, at 0.07MPa, is carried out discharging in the time that solid content reaches 25%～40%.
8. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 2) middle Fructus Hordei GerminatusIn dextrin addition and inspissated juice, the mass ratio of solid content is (1～1.5): (8.5～9).
9. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 3) middle clean26～28 DEG C of the temperature of air, pure air outlet pressure 35～42kPa, rotation purges rotating speed 2～3r/min, and spraying is dryAfter fruit powder water content below 7%.
10. the preparation method of high purity instant fruit powder according to claim 1, is characterized in that step 4) middle dehumidifyingAfter pure air moisture content 1～2.5wt%, 42～46 DEG C of temperature, it is 22-26m/s that the pure air after dehumidifying passes into speed.
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| CN107373276A (en) * | 2017-08-01 | 2017-11-24 | 宣城华科宣木瓜生物科技有限公司 | A kind of Xuancheng's pawpaw fast dissolving fruit powder and preparation method thereof |
| CN107373489A (en) * | 2017-07-24 | 2017-11-24 | 中国热带农业科学院农产品加工研究所 | A kind of preparation method of cold water solubles dragon fruit fruit powder |
| CN112544755A (en) * | 2020-12-11 | 2021-03-26 | 云南农业大学 | Instant coffee fruit tea powder and preparation method thereof |
| CN114304416A (en) * | 2021-12-17 | 2022-04-12 | 嘉必优生物技术（武汉）股份有限公司 | Lactose-free milk protein powder rich in polyunsaturated fatty acids and preparation method thereof |
| CN114403392A (en) * | 2022-01-26 | 2022-04-29 | 西南大学 | Preparation method of instant winter jujube powder and product thereof |
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