CN104222894B - A kind of method utilizing the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency - Google Patents
A kind of method utilizing the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency Download PDFInfo
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L19/00—Products from fruits or vegetables; Preparation or treatment thereof
- A23L19/03—Products from fruits or vegetables; Preparation or treatment thereof consisting of whole pieces or fragments without mashing the original pieces
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Abstract
Utilize a method for the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency, belong to fruit-vegetable food processing technique field. Does is process of the present invention: Radix Dauci Sativae is chosen, cleans peeling, stripping and slicing, 2450? MHz and 915? the spouted drying of the microwave combined pulse of MHz and nitrogen-filled packaging, two benches microwave order can be exchanged. First 2450? after MHz 915? MHz is dry, conditioning carrot block dry basis moisture content is down to below 0.15g/g, time of drying shortens about 30% compared with common warm air drying, uniform drying is improved compared with conventional microwave drying, uneven rate decline 70%, content beta-carotene storage rate reaches 77%, and rehydration ratio reaches 3.24; After first 915MHz 2450? MHz is dry, carrot block dry basis moisture content is down to below 0.15g/g, time of drying shortens about 40% compared with common warm air drying, uniform drying is improved compared with conventional microwave drying, uneven rate decline 50%, ��-carotene storage rate reaches 65%, and reconstitution rate reaches 2.84; All improve product integrated quality.
Description
Technical field
A kind of method utilizing the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency of the present invention, is specifically related to a kind of method of drying processing dehydration Radix Dauci Sativae, belongs to fruit-vegetable food processing technique field.
Background technology
Drying refers in chemical industry, by means of heat energy, moisture in material (or solvent) is gasified, and takes away the process of the steam generated by rare gas element. The dry one as food-processing mode, can be down to the water content of food below to a certain degree, to reach prolongation shelf-lives, is convenient to transport, the object such as develop new product. Drying is the work of a power consumption, and the characteristic of its longer process period and maintenance material comparatively high temps requires to consume a large amount of energy.
Microwave is the hertzian wave of frequency at 300MHz to 300GHz. Its ultimate principle adding thermal material is owing to microwave belongs to the category of hertzian wave, polar molecule in microwave field along with the change of microwave operating frequency not stall move, a large amount of heat of friction produced make material be heated. One of feature of microwave drying is that the heating of endogenous property makes greatly shorten time of drying. Due to the distribution problem that the distribution of internal batch polar molecule is uneven and microwave field is in drying process so that conventional microwave drying has non-uniform phenomenon to produce. In order to overcome the ununiformity of microwave drying, the present invention adopts the spouted microwave of pulse to be dried, intermittently spouted air-flow is formed to air inlet in drying chamber by pneumatic pump, make material constantly change position in drying cabin and alleviate the phenomenon that heating is uneven, avoid the appearance burnt a little, it is to increase the quality of product.
Material is processed by the present invention in conjunction with 2450MHz microwave frequency and 915MHz low frequency microwave combined drying. High frequency microwave frequency changing rate within the unit time is faster, but corresponding microwave permeability occasioned not as good as low frequency microwave. Due to drying stage major part free water is de-remove after have one and obviously fall speed process, now adopting low frequency microwave that material is dried the penetrance that low frequency microwave can be utilized better makes the moisture of internal batch be removed, thus shorten time of drying, it is to increase product quality. In addition owing to the heating efficiency of 915MHz microwave is slightly inferior to 2450MHz microwave, this makes drying process more easily control on the contrary, and in dry latter stage owing to material moisture is very low, excessive heating easily causes material to burn. And the application of 915MHz microwave phase after the drying can alleviate this effect, when carrying out when utilizing 915MHz that early stage is dry and later-stage utilization 2450MHz microwave pulse is dry, it is possible to shorten time of drying further.
Li Zhaodi etc. (2007) have studied the microwave drying process condition optimizing of carrot slice, study tour slice thickness, time of drying, loading capacity and the microwave power impact on product quality. The percentage of water loss of research carrot slice, organoleptic quality, rehydration etc., as evaluation index, obtain the optimum process condition of microwave drying carrot slice. Experimental result shows optimal conditions to be slice thickness is 3mm, dry power to be 0.315kW, time of drying be that 5min, loading capacity are 8g. This research only considered the effect of microwave drying under 2450MHz, it does not have relates to and improves homogeneity and utilize low frequency microwave drying to improve the problem of product quality.
Xiong Yongsen etc. (2008) are tested by carrot slice microwave drying power and slice thickness dehydration characteristic, obtain carrot slice microwave drying dehydration characteristic; Carry out the quadratic orthogonal regression of 3 factors (transmitted power, slice thickness, tempering time) 4 indexs (quality, rehydration ratio, unit time precipitation rate and unit power consumption amount). Have employed nonlinear programming and each index is carried out objective optimization, draw the microwave power of each objective function, slice thickness, the optimum combination of tempering time; By being fixed on complex optimum point, the relation after carrying out dimension-reduction treatment, between each factor of analytic explanation and quality, rehydration ratio, drying rate and unit consumption of energy amount. Experimental result has shown that slice thickness and power are to microwave drying carrot slice loss water regulation, and result shows that dry dehydration in latter stage difficulty increases, if power increases by 1 times, drying decreases 60%��70% to safe water ratio required time. Compared with the inventive method, it is still drying effect under investigation 2450MHz microwave frequency, adopts low frequency microwave to carry out dry materials, also do not design the means of the dry homogeneity of any improvement.
Ma Xianying etc. (2007) have studied the technique with combined hot-air and microwave drying Radix Dauci Sativae, selected 60%, 50%, 40%3 moisture contents of test are as the transformation point of warm air drying and microwave drying mode, whole drying process is divided into two stages: first material good for pre-treatment is carried out warm air drying, when reaching selected moisture transformation point content, it is final finished with microwave drying again, hot blast temperature controls at 55,65,75 DEG C respectively, wind speed is 2.5m/s, microwave power controls respectively 170,255,340W, orthogonal test scheme is taked in test. Result shows that with the optimal processing parameter of combined hot-air and microwave drying Radix Dauci Sativae be hot blast temperature 65 DEG C, and microwave power is 170W, and transformation point material water ratio is 60%; Improving more than 1.4 times with the hot air drying rate that the drying rate of combined hot-air and microwave drying is more conventional, the quality of dry products significantly improves. This research adopts hot blast-microwave combining drying to be dried by Radix Dauci Sativae, different from the two of the present invention kinds of frequency microwave associating pulse spouted highly effective drying methods.
Ma Rongshan etc. (2008) have studied the research that carrot meal physico-chemical property is affected by different dry drying method. Test adopts warm air drying, microwave drying, vacuum-drying and lyophilize that Radix Dauci Sativae is dried powder process, studies the physico-chemical property of dried carrot meal. Result shows: the carrot meal unit weight of warm air drying is maximum, pH and Vc content is minimum, and water injectivity index and oil absorption are better; The carrot meal water-absorbent of microwave drying is best, and solubization and oil absorption are worst, and aminoacids content is minimum, and unit weight is only less than the carrot meal of warm air drying, and pH and amino acid are higher than the carrot meal of warm air drying; In every index of test carrot meal, vacuum-drying is better than hot blast and microwave drying, and lower than lyophilize; The molten aqua index of the carrot meal of lyophilize and oil absorption are good, and unit weight is low, and amino acid and Vc content are the highest. This research does not relate to combined drying research, just compares several drying mode to the physical and chemical index of the drying effect of carrot meal and dry rear carrot meal.
Some about utilizing the working method of raw material beyond microwave drying Radix Dauci Sativae also reported. Chen Yan and Chen Yubai (2004), for Problems existing in lichee warm air drying, applies homemade microwave drying test system, adopts intermittently drying technique, and experimental study lichee microwave drying characteristic and drying conditions are on the impact of Quality of dry product, energy consumption. Result shows: lichee microwave drying is mainly in constant rate period, and rate of drying depends on different interval ratios; Temperature variation can be divided into rising and tend towards stability two stages; Quality of dry product is had remarkably influenced by the microwave intermittent time, energy consumption for drying by interval than impact, but major influence factors is heat-up time. This research adopts intermittent type microwave drying control heating rate, prevents excessively dry. Do not adopt identical mode of operation to prevent the superheating phenomenon in drying process compared with the present invention, not by different being used in conjunction of frequency microwave being improved the quality of products yet.
Chinese prickly ash has been carried out intermittent drying test by the microwave that Zhao superfine (2007) utilizes power to be respectively 800W, 509W, 290W, and applies quality and temperature that homemade microwave drying test system have detected Chinese prickly ash. Test-results shows, compared with traditional heated air drying, the time of microwave drying Chinese prickly ash shortens greatly, but dried Chinese prickly ash quality is undesirable, and microwave power is more big, and quality is more poor. Thinking owing to the uneven drying of microwave causes deterioration in quality, compared with the present invention, any raising uniform drying and the technique means preventing product local temperature too high are not taked in this research.
Analyzed by scientific and technical literature, be combined the research and apply in dry fruit and vegetable product at low frequency with high frequency microwave at present and report or blank. The present invention utilizes 2450 can integrate the advantage of two kinds of drying modes with 915MHz microwave combining drying fruit and vegetable product, uniform drying can be improved, thus improve product quality.
Through the patent that retrieval is closely related with the present invention, make a concrete analysis of as follows:
, Wang Yuchuan, a kind of negative-pressure microwave uniform spraying drying installation and application, patentee: Southern Yangtze University (China Patent No.: ZL201010572843.0), this patent research can realize spouted due to material under negative pressure, adopt this device can realize material spouted when vacuum microwave drying, rotate, flowing, reach material high-efficiency, evenly dry object, the conventional freeze-drying of contrast shortens time of drying more than 40% mutually simultaneously, reduce production cost, many fruit and vegetable crisp chips are mainly carried out high vacuum microwave freeze-dry by this patent, the 2450MHz microwave wave frequency utilized is dried, compared with the present invention, material is carried out spouted by under vacuum, and do not combine with 915MHz low frequency microwave.
Luo Shaojia, Yuan Ya, Zhu Meng, Tao Fei, a kind of grass poison permeating and dewatering and the method (Chinese patent notification number: CN101653167B) of vacuum microwave drying, this patent research is a kind of by the processing mode of strawberry permeating and dewatering in conjunction with vacuum microwave combining drying, compared with conventional vacuum microwave, raising product quality can be played, shorten the object of time of drying. Compared with tradition freeze-drying, it is possible to the freeze-drying time of 48h is foreshortened to 2-3h, and improve the nutrition of product and organoleptic quality and functional performance, especially make the loss of thermo-sensitivity nutritive ingredient and bioactive functions composition greatly reduce. Compared with the present invention, this patent adopts the mode of permeating and dewatering and vacuum microwave combining drying, different from the microwave combining drying of the two of the present invention kinds of different frequencies, and material is not dried by the present invention under vacuum.
Song Yongsheng, Tang Hao, Wang Xiaoguo, Ding Min, Guo Jinghua, travelling belt microwave drier (Chinese patent notification number: CN203550453U), this patent comprises: travelling belt, storage material frame and microwave dryer. Adopting conveyor type mass transport mode to improve uniform drying, this device eliminates charge cask, decreases charge cask to the absorption of microwave so that the microwave energy of major part, all for the drying of material, thus improves effect and the efficiency of microwave drying. Compared with the present invention, this patent improves uniform drying by belt conveying, and the present invention by carrying out spouted uniform drying of improving to material, and by improving product quality with 915MHz low frequency microwave combined drying.
Those spies of Korea Spro, based on the high-level efficiency microwave drying system (China Patent No.: CN202599063U) of vacuum microwave drying technology, this patent is based on the high-level efficiency microwave drying system of vacuum microwave drying technology. Its microwave is from sidewall feed-in, make heating material more even, the material of microwave inner cavity can be carried out the Microwave emission of multi-angle by the microwave generator being arranged on different lateral, Microwave Power Density in microwave inner cavity is made evenly and greatly to increase the efficiency of dried material, improve the speed of drying materials, accelerate the speed of food-processing. Compared with the present invention, the distribution that this patent lays particular emphasis on the dielectric field improving in dryness storehouse by the arrangement mode of magnetic flux pipe improves uniform drying, and by dynamically changing the position of material in dryness storehouse, to improve the method for homogeneity different from the present invention.
Liu Yan, Fan Kai, yellow pine, Li Longjun, Jia Jiali, Hao Shihai, a kind of fresh red sage root microwave drying technology (China Patent No.: CN102784199A), it relates to a kind of traditional Chinese medicine technology, in particular to the fresh red sage root microwave drying technology of one. The method for microwave drying of the fresh red rooted salvia of this patent, comprises the following steps: get fresh red rooted salvia, obtains the dry red sage root with microwave drying, and wherein the condition of microwave drying is: temperature 35-90 DEG C, time of drying 5-360min, normal pressure or decompression. Compared with the present invention, no matter this patent is applicable raw materials, the means of auxiliary oil recovery enhancement or magnetic flux pipe type is all not identical.
She controls youth by rattan, rattan great, microwave drying food and manufacture method (China Patent No.: CN1857125A) thereof, this patent is by needing dried feed to carry out pre-treatment, obtain and there is excellent Restoration, local flavor, sense of food or the considerably less microwave drying food of color tone change. Compared with the present invention, this patent is emphatically to the pre-treatment needing dry sample, or is obtained the food of composite flavor by recombinant means, this kind of food due to moisture content own comparatively even, virtually improve uniform drying, different from special emphasis of the present invention.
Xu Huasheng, edible fungi microwave dryer (China Patent No.: CN103385528A), this patent provides a kind of edible fungi microwave dryer, it is achieved that collection cleans, compacting, and drying is, it may also be useful to convenient, simple to operate, saves manpower and materials; The setting of captation and wastewater treatment equipment, it is achieved that useless Water reuse after cleaning, energy-conserving and environment-protective. Compared with the present invention, this patent is focused on integration and is produced, and focuses on saving manpower and materials and energy-conserving and environment-protective. Bigger with technological disparity involved in the present invention.
Summary of the invention
It is an object of the invention to is the deficiency overcoming prior art existence, it is provided that a kind of method utilizing the spouted dry highly-efficient processing dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency.
The technical scheme of the present invention, utilize a method for the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency, comprise undertaken Radix Dauci Sativae raw material choosing, clean peeling, stripping and slicing, the spouted drying of microwave combined pulse, nitrogen-filled packaging obtain product dehydrate and nurse one's health Radix Dauci Sativae; Concrete steps are:
(1) pre-treatment: choose a fresh carrot cleaning big, that have no mechanical damage and remove the peel, be cut into the Radix Dauci Sativae square of 5mm;
(2) the spouted drying of microwave combined pulse:
First 2450MHz is the spouted efficient uniform dehydration of the microwave combined pulse of 915MHz again; By step (1) gained material with the 2450MHz spouted dehydration of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 30min; Continuing with the 915MHz spouted dehydration of microwave combined pulse, microwave intensity 3W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 25min;
Or the first 915MHz microwave combined pulse of 2450MHz spouted efficient uniform dehydration again: by step (1) gained material with the 915MHz spouted dehydration of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 30min; Continuing with the 2450MHz spouted dehydration of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 20min;
Two benches microwave order can be exchanged;
(3) packaging process: the conditioning Radix Dauci Sativae product after the dehydration of spouted for the microwave combined pulse of step (2) gained efficient uniform being terminated takes out, and carries out every bag of 300-500g and rushes nitrogen packaging of aluminium foil bag.
Being dewatered as the first stage by 915MHz microwave, dewatering time is relatively short, but slightly declines compared with the product of the quality microwave first with 2450MHz with dehydration homogeneity of conditioning diced carrot.
In step (2), first 2450MHz the more microwave combined pulse of 915MHz spouted dehydration time, after the spouted dehydration of 2450Mhz pulse, nurse one's health carrot block dry basis moisture content and be down to 2.5g/g; After the spouted dehydration of 915MHz pulse, conditioning carrot block dry basis moisture content is down to 0.15g/g;
Or first 915MHz the more microwave combined pulse of 2450MHz spouted dehydration time, after the spouted dehydration of 915MHz pulse, nurse one's health carrot block dry basis moisture content and be down to 3.7g/g; After the spouted dehydration of 2450MHz pulse, conditioning carrot block dry basis moisture content is down to 0.15g/g.
Step (3) gained microwave spouted combined highly effective dehydrating and conditioning Radix Dauci Sativae product dry basis moisture content reaches below 0.15g/g, dehydration is packed after terminating at once, air in thorough isolated environment, avoiding the moisture absorption, the product below this water content packs to store can preserve with shady and cool place in lucifuge there is not obvious quality comparison in more than 1 year.
The useful effect of the present invention: the present invention can significantly improve product quality compared with conventional hot-air dewatering product, significantly shorten process period, reduces energy consumption. And owing to having carried out spouted to material, significantly improve the homogeneity of dehydration.
Due to 2450MHz high frequency microwave and 915MHz low frequency microwave coupling, the rapid heating performance of the excellent penetration performance and 2450MHz high frequency microwave that take full advantage of 915MHz low frequency microwave is to improve controllability, thus improves product comprehensive quality. Utilizing the spouted processing dehydrating and conditioning diced carrot of 2450-915MHz pulse, total dewatering time 55min, process period shortens about 30% compared with common hot-air dewatering; Improving homogeneity compared with conventional microwave dehydration, uneven rate decline 70%, content beta-carotene storage rate reaches 77%, and rehydration ratio reaches 3.24.
Utilize the spouted processing dehydration diced carrot of 915-2450MHz pulse, total dewatering time 50min, compared with common hot-air dewatering, process period shortens about 40%, dehydration homogeneity is improved compared with conventional microwave dehydration, uneven rate decline 50%, content beta-carotene storage rate reaches 65%, and reconstitution rate reaches 2.84.
Embodiment
The first 2450MHz microwave of embodiment 1 915MHz microwave pulse combined dehydration conditioning carrot block again
Fresh carrot through selecting (individual big, have no mechanical damage), clean, after peeling, stripping and slicing (5mm) process, directly put into the spouted drying plant of 2450MHz microwave pulse and be dried. Microwave power is 2W/g, and setting spouted frequency is every minute spouted 5 times, each spouted 5s. This stage dewatering time is about 30min. Conditioning carrot block water content through the dehydration of this stage is down to 2.5g/g (dry basis moisture content) left and right. Carrot block after the spouted dehydration of 2450MHz microwave pulse can not reach product requirement, and next step puts it into and carries out in the spouted equipment of 915MHz microwave pulse continuing dehydration. Microwave power is 3W/g, and setting spouted frequency is spouted 5 times of every min, each spouted 5s. This stage dewatering time is about 25min. Conditioning carrot block water content through the dehydration of this stage is down to 0.15g/g (dry basis moisture content) left and right. Terminate dehydration when material moisture arrives below 0.15g/g, taking-up material is put into aluminium foil bag at once and is carried out nitrogen-filled packaging (every bag of 300-500g).
Carotene carotene content in this combined dehydration sample reaches 0.035mg/g. It is significantly improved compared with the carotene carotene content 0.028mg/g in the simple spouted dehydrated sample of 2450MHz microwave. Compared with common hot-air dewatering, dewatering time shortens 30%, compared with conventional microwave dehydration, improves dehydration homogeneity, uneven rate decline 70%, content beta-carotene storage rate reaches 77%, and rehydration ratio reaches 3.24.
The first 915MHz microwave of embodiment 2 2450MHz microwave pulse combined dehydration conditioning carrot block again
Fresh carrot through selecting (individual big, have no mechanical damage), clean, after peeling, stripping and slicing (5mm) process, directly put into the spouted equipment of 915MHz microwave pulse and be dried. Microwave power is 2W/g, and setting spouted frequency is spouted 5 times of every min, each spouted 5s. This stage dewatering time is about 30min. Conditioning carrot block water content through this stage drying is down to 3.7g/g (dry basis moisture content) left and right. Conditioning carrot block after the spouted dehydration of 915MHz microwave pulse can not reach product requirement, and next step puts it into the spouted equipment resume dehydration of 2450MHz microwave pulse. Microwave power is 2W/g, and setting spouted frequency is spouted 5 times of every min, each spouted 5s. This stage dewatering time is about 20min. Conditioning carrot block water content through the dehydration of this stage is down to 0.15g/g (dry basis moisture content) left and right. Terminate dehydration when material moisture arrives below 0.15g/g, taking-up material is put into aluminium foil bag at once and is carried out nitrogen-filled packaging (every bag of 300-500g).
Carotene carotene content in this combined dehydration sample reaches 0.032mg/g. It is significantly improved compared with the carotene carotene content 0.028mg/g in the simple spouted dehydrated sample of 2450MHz microwave. This route is compared with common hot-air dewatering, and dewatering time shortens about 40%, compared with conventional microwave dehydration, improves the homogeneity of dehydration, and uneven rate decline 50%, content beta-carotene storage rate reaches 65%, and rehydration ratio reaches 2.84.
Claims (3)
1. one kind utilizes the method for the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency, it is characterised in that comprise undertaken Radix Dauci Sativae raw material choosing, clean peeling, stripping and slicing, the spouted drying of microwave combined pulse, nitrogen-filled packaging obtain product dehydrate and nurse one's health Radix Dauci Sativae; Concrete steps are:
(1) pre-treatment: choose a fresh carrot big, that have no mechanical damage and clean peeling, be cut into the Radix Dauci Sativae square of 5mm;
(2) the spouted drying of microwave combined pulse:
First 2450MHz is the spouted efficient uniform dehydration of the microwave combined pulse of 915MHz again; By step (1) gained material with the 2450MHz spouted dehydration of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 30min; Continuing with the 915MHz spouted dehydration of microwave combined pulse, microwave intensity 3W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 25min;
Or the first 915MHz microwave combined pulse of 2450MHz spouted efficient uniform dehydration again: by step (1) gained material with the 915MHz spouted dehydration of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 30min; Continuing with the 2450MHz spouted drying of microwave combined pulse, microwave intensity 2W/g, pulse-repetition is spouted 5 times of 1min, and each 5s intermittent type is spouted, and dewatering time is 20min;
(3) packaging process: the conditioning Radix Dauci Sativae product after the dehydration of spouted for the microwave combined pulse of step (2) gained efficient uniform being terminated takes out, and carries out every bag of 300-500g and rushes nitrogen packaging of aluminium foil bag.
2. utilize the method for the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency according to claim 1, it is characterized in that: in step (2), first 2450MHz the more microwave combined pulse of 915MHz spouted dehydration time, after the spouted dehydration of 2450Mhz pulse, material carrot block dry basis moisture content is down to 2.5g/g; After the spouted drying of 915MHz pulse, conditioning carrot block dry basis moisture content is down to 0.15g/g;
Or first 915MHz is when the spouted efficient uniform of the microwave combined pulse of 2450MHz is dewatered again, after the spouted dehydration of 915MHz pulse, conditioning carrot block dry basis moisture content is down to 3.7g/g; After the spouted dehydration of 2450MHz pulse, conditioning carrot block dry basis moisture content is down to 0.15g/g.
3. utilize the method for the spouted dry efficient uniform dehydrating and conditioning Radix Dauci Sativae of the height microwave combined pulse of frequency according to claim 1, it is characterized in that: the spouted dry high-efficiency dehydration conditioning Radix Dauci Sativae product dry basis moisture content of the microwave combined pulse of step (3) gained reaches below 0.15g/g, dehydration is packed after terminating at once, air in thorough isolated environment, avoiding the moisture absorption, the product below this water content packs to store can preserve with shady and cool place in lucifuge there is not obvious quality comparison in more than 1 year.
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