CN108936139A - A kind of preparation method and equipment of bananas juice - Google Patents
A kind of preparation method and equipment of bananas juice Download PDFInfo
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- CN108936139A CN108936139A CN201810720383.8A CN201810720383A CN108936139A CN 108936139 A CN108936139 A CN 108936139A CN 201810720383 A CN201810720383 A CN 201810720383A CN 108936139 A CN108936139 A CN 108936139A
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- Prior art keywords
- microwave
- banana
- bananas juice
- pipeline
- nitrogen
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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
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
- A23L2/04—Extraction of juices
-
- 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
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/42—Preservation of non-alcoholic beverages
- A23L2/50—Preservation of non-alcoholic beverages by irradiation or electric treatment without heating
-
- 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
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
Abstract
The invention discloses a kind of bananas juice preparation processes, comprising: is gone to handle with peeling end to end by the banana after screening；Banana pulp is slightly beaten, banana is obtained and slightly starches；Banana is slightly starched and is transferred to positive pressure of nitrogen sealed pipe type microwave heating appts via closed conduit and carries out microwave disinfection inactivation treatment in flow process；The banana is slightly starched before microwave heating appts using the stirring of spiral propeller side plus squish lip conveying；Banana after above-mentioned sterilization inactivation treatment is slightly starched and carries out thin mashing processing；Banana slurry after thin mashing is handled well is put into and stirs in blend tank and is deployed according to required drink variety, and adds water at bananas juice；Homogeneous is carried out to bananas juice using high pressure homogenizer；Vacuum Degassing Process is implemented to the bananas juice after homogeneous；Bananas juice after vacuum outgas is further sterilized；Bananas juice after further sterilization is subjected to aseptic canning in confined space.
Description
Technical field
The present invention relates to a kind of bananas juice preparation methods for being also easy to produce brown stain, and in particular to one kind is equipped with microwave heating process
Bananas juice preparation process and a kind of pipeline type microwave that can prevent banana brown stain sterilize inactivation equipment.
Background technique
Banana target user is extensive, have it is very high medicinal, edible health value, be economic benefit on domestic and international market
One of most significant fruit product.The area of the banana of South China of China cultivation at present is just continuously increased, and yield just steps up,
Have become that each province of South China of China is large to cultivate apple trees.However, banana term concentrates, influenced by storage and transportation sales situation etc.,
The further processing of banana is to alleviate the contradictory main means of production and marketing.
In the process of banana, product quality is largely influenced since it is easy to happen brown stain,
Prevent banana brown stain from becoming the area research emphasis using multiple technologies in recent years.The generation of Characteristics of Polyphenol Oxidase in Banana needs three items
Part: phenols substrate, phenol oxidase and oxygen appropriate.The method of controlling enzymatic browning from traditional heating, adjust pH value to life
The application of object technology, research are carried out constantly.The method of controlling enzymatic browning is segmented into three categories at present: physical control,
Chemical Control and biotechnology control.Wherein, physical control means include microwave treatment, hot air treatment, hot water and steam processing
It include that such as citric acid, malic acid, ascorbic acid, sulfur oxide add Deng, Chemical Control, BIOLOGICAL CONTROL technology includes that onion such as mentions
Take object, plant rennet, honey, the addition of lactic acid bacteria etc..
Since microwave treatment method has many advantages, such as that easy to operate and control, treatment effeciency is high, effect is good, causes and grinds extensively
Study carefully.In the prior art, microwave processes can be divided into four kinds of modes: (1) microwave treatment enzyme deactivation is used alone；(2) it uses and adds
Pulp enzyme (or complex enzyme) assisted microwave synthesis enzyme deactivation；(3) enzyme deactivation of color stabilizer assisted microwave synthesis is used；(4) using pressurization or heating enzyme deactivation
Assisted microwave synthesis enzyme deactivation.The representative prior art, as banana research institute of Yunnan Province has studied a kind of prevent-browning bananas juice
Preparation method, preparation process include: banana sorting → peeling → microwave deactivating enzyme → slurrying → filtering → homogeneous → vacuum outgas
→ sterilization → filling → cooling → finished product.But the technology handled using first microwave deactivating enzyme, after carry out mashing allotment, and tunnel
Type micro-wave enzyme deactivation device causes microwave processes efficiency lower because isolating oxygen and microwave can not have uneven place completely,
Enzyme deactivation is not thorough, and anti-browning effect is bad.
From product currently on the market and from the point of view of closing publication public information, the prior art does not all have very good solution enzyme also
Promote browning, the bananas juice processed no matter color condition or flavor taste, it is all unsatisfactory.Therefore this field is anxious
Need it is a kind of can more safe and efficient, enzyme-deactivating the microwave prevent-browning processing method and slurrying of banana brown stain thoroughly can be effectively controlled
Equipment, technique.
Summary of the invention
The present invention provides a kind of bananas juice microwave processes, can efficiently solve in banana drink finishing passes
Browning.The present invention is beaten before passing through microwave deactivating enzyme, to slurry using microwave processes such as positive pressure of nitrogen operations, is mentioned
The efficiency of high treatment process improves treatment effect simultaneously.
A kind of bananas juice preparation process, comprising:
Banana after screening is gone to handle with peeling end to end；
Banana pulp is slightly beaten, banana is obtained and slightly starches；
Banana is slightly starched and is transferred to positive pressure of nitrogen sealed pipe type microwave heating appts via closed conduit, is carried out in flow process
Microwave disinfection inactivation treatment；
Banana after above-mentioned sterilization inactivation treatment is slightly starched and carries out thin mashing processing；
Banana slurry after thin mashing is handled well is put into and stirs in blend tank and is deployed according to required drink variety, and
Add water at bananas juice；
Homogeneous is carried out to bananas juice using high pressure homogenizer；
Vacuum Degassing Process is implemented to the bananas juice after homogeneous；
Bananas juice after vacuum outgas is further sterilized；
Bananas juice after further sterilization is subjected to aseptic canning in confined space.
Preferably, the thick pulping process does not add any moisture, and the banana meat is in the form of slurries described closed
It is sent by what is stirred while conveying to microwave heating in pipeline, by injection nitrogen in the preferred pipeline, plays isolation air
Effect prevents banana raw juice oxidizing brown stain；It is further preferred that the banana is slightly starched in closed conduit through screw material
Pusher realize on one side pushes convey while mixing effect.
It is aforementioned preferred, atmospheric pressure of the nitrogen pressure control at 1.2 ~ 1.5 times in the microwave processing process, nitrogen stream
Speed 4-10m3/min and flow direction it is identical as banana slurry conveying direction；It is further preferred that the nitrogen is in the pipe
Road type micro-wave processing unit feed inlet side is filled with, and is equipped with nitrogen pressure release means in microwave heating appts discharge port side.
Aforementioned preferred, the high-pressure homogeneous process is secondary, preferably first time pressure -40MPa, second of pressure 50-
80MPa；
Aforementioned preferred, the sterilization temperature is 80-85 DEG C, and the preferably time is 5-8 seconds；
Aforementioned preferred, above-mentioned canned entire filling apparatus is closed space；It is preferred that canned temperature is 80-85 DEG C.
Aforementioned preferred, above-mentioned slurrying can be used colloid mill mashing, when slurrying, preferred feed: water volume ratio=1:2.0-
3.0；While being put into material, citric acid, D-araboascorbic acid sodium are added more preferably in the form of spray, and controls pH value and is
2.2-3.0。
Aforementioned preferred, the microwave processes process is divided into main process task section and isothermal holding section, the main process task section
Microwave power, microwave density, heating time are greater than soaking zone microwave power, microwave density, heating time；Preferably, the master
The microwave power 60-12OKW of processing section microwave treatment, such as 85KW, microwave frequency 2000-2800MHz, such as 2450MHz, are killed
Bacterium inactivation time 5-10 minutes；The microwave power 20-6OKW of soaking zone microwave treatment, such as 45KW, microwave frequency 2000-
2800MHz, such as 2450MHz are sterilized inactivation time 3-8 minutes；The power density of specific implementation is 4-8W/g, preferably 6 W/g；
It is highly preferred that the temperature at the end of two sections of microwave treatments is 75-93 DEG C, preferably 88 DEG C.
A kind of bananas juice obtained using previous process.
It is a kind of using aforementioned bananas juice be raw material product.
A kind of pipeline type microwave processing unit scheme one applied to previous process comprising: microwave heating pipeline, it is described
Microwave heating pipeline includes conveying inner tube and conveying outer tube, conveys and forms the ring for accommodating material between inner tube and conveying outer tube
Shape chamber；The multiple microwave generators being located on the outside of the conveying outer tube；And it is connected to the material of the microwave heating pipeline and enters
The material pusher of mouth, the material enters microwave heating pipeline by material inlet under the promotion of material pusher, in microwave
Handled under field action: the microwave heating pipeline be it is closed, the material pusher be screw material pusher and
It is driven by variable-frequency motor, nitrogen charging device is set at the material inlet of microwave heating pipeline, makes material in the microwave heating pipe
In road under barotropic state；The multiple microwave generator is arranged along the axially spaced-apart of microwave heating pipeline, and each microwave is sent out
For raw device respectively in the circumferential metal ring cavity for forming microwave reflection of conveying outer tube, the magnetron of each microwave generator can be independent
It is controlled.
A kind of pipeline type microwave processing unit scheme two using previous process comprising: pipe made of metal
Shell is arranged in shell the microwave heating pipeline made of nonmetallic materials, is arranged in the inner wall of tube shell side microwave heating pipe
The material being in the microwave generator microwave field in the microwave heating pipeline is arranged in the microwave generator of pipeline outer wall side
Pusher, the material enter microwave heating pipeline by material inlet, by the material pusher under the microwave field action
Push to material outlet, the microwave heating pipeline be it is closed, mobilization dynamic of the fluid in it is from being arranged in its material
The material pusher of entrance side is driven for screw material pusher and by variable-frequency motor, the microwave heating pipe where it
Nitrogen charging device is arranged in the material inlet side in road, pushes away material under barotropic state by the material in the microwave heating pipeline
The discharge port for sending device to push to microwave treatment dress；The microwave generator includes along the multiple micro- of material transmission direction setting
Wave transmitting unit, it is micro- that each Microwave emission unit in microwave heating pipeline peripheral side forms circumferentially distributed one or more
Wave launch point, each Microwave emission point are arranged with the magnetron and driving circuit of independent transmitting microwave；It is described each
Microwave emission unit, each Microwave emission point can independent controls.
It is further preferred that the microwave power can be adjusted using the voltage for being applied to Microwave emission point, the microwave
Heating time can be adjusted using the conveying speed of control material.
The two of above-mentioned pipeline type microwave processing unit preferred embodiment are it is further preferred that each Microwave emission unit includes
2-8 circumferentially uniformly distributed Microwave emission points, preferred even number, it is further preferred that Microwave emission point symmetry is arranged, further
Direction preferably is pushed along the material, the Microwave emission point of each section of Microwave emission unit is reduced paragraph by paragraph or by unit, as excellent
One of embodiment is selected, the Microwave emission unit is divided into four sections, and every section of each unit, every unit launch point is 8,6,4,2；
Preferably two, the Microwave emission unit is divided into two sections, every section of each unit, every unit launch point is 8,
4。
The two of above-mentioned pipeline type microwave processing unit preferred embodiment are it is further preferred that along banana conveying direction stagger arrangement
Arrange the launch point of the multiple Microwave emission unit；In another illustrative embodiments, the multiple Microwave emission list
The launch point of member integrally helically arranges along banana conveying direction, the push direction phase of the hand of spiral and screw banana conveyer
Together.
Above-mentioned pipeline type microwave processing unit preferred embodiment two it is further preferred that microwave heating pipeline using soft
Silica gel material is made.
The two of above-mentioned pipeline type microwave processing unit preferred embodiment are it is further preferred that screw material pusher is excellent
Select shaftless screw rod pusher.
Above-mentioned pipeline type microwave processing unit preferred embodiment two it is further preferred that nitrogen charging device by nitrogen spiral
It is tangential to be sent into microwave heating pipeline, and the conveying direction of nitrogen and the conveying direction of banana are in the same direction.In illustrative embodiments
In, the outlet end of the microwave heating pipeline is equipped with nitrogen pressure relief device, so that banana slurry comes out via microwave heating pipeline
Nitrogen in microwave heating pipeline is discharged before being delivered to storage facilities.
The two of above-mentioned pipeline type microwave processing unit preferred embodiment are it is further preferred that pipeline type microwave sterilization inactivation
Equipment further includes a banana pretreatment section for being not provided with microwave generating apparatus, which is connected to the pipeline type microwave and kills
Bacterium inactivates equipment entrance, make banana first pass through in advance its processing enter back into it is micro- equipped with microwave generating apparatus and screw rod material pusher
Wave heating pipeline, the effect that the pretreatment section can be pre-processed according to banana type and banana regime to guarantee microwave treatment
Fruit, pretreatment section are set as the closed conduit for having augers.In another exemplary embodiment, banana is located in advance
Reason section is provided with atomizing humidifier, to prevent banana solid product from losing brittleness in microwave heating process excessively drying.
The two of above-mentioned pipeline type microwave processing unit preferred embodiment are it is further preferred that the pipeline type microwave is sterilized
Inactivating equipment further includes control system, and the control system includes banana temperature monitoring unit, and the temperature monitoring unit includes
Temperature sensor between multiple Microwave emission units to monitor banana temperature is set；Described control unit further includes microwave
Control unit, to control multistage microwave generator and each Microwave emission unit, the starting of Microwave emission point and heating time.
Described control unit further includes the motor control unit of screw material pusher, to control banana in microwave heating pipeline
The speed being pushed.It is further preferred that the microwave control system further includes central microprocessor, when temperature monitoring unit is supervised
The banana temperature measured not within the set range when can carry out microwave power and/or microwave density and/or motor material push speed
Degree adjustment.It is further preferred that the microwave control system further includes pressure control unit, to control the nitrogen charging of nitrogen charging device
Skill nitrogen flow speed is measured, it is further preferred that the nitrogen flow rate that the nitrogen charging device is added is 4-10m2/ minute.Further
Preferably, the control system further includes predetermined system, so that microwave control unit and the screw rod material pusher motor control
Unit processed can apply automatically preset microwave power, microwave density and microwave according to preset banana species and banana parameter and add
Hot time, the banana parameter are at least temperature, can also be banana species, temperature, humidity, viscosity, pol, flow etc..
Further, the canned sale of bananas juice, is added hydrogen simultaneously when canned, and the addition flow velocity of the hydrogen is that 35- is added
90L/min, preferably the addition flow velocity of hydrogen are 40-80L/min, and the addition flow velocity of more preferable hydrogen is 50-70L/min, preferably
Flow rate of liquid pressure is 3-6 kilograms.The metabolic waste that the addition of hydrogen can help body discharges extra, removes harmful freedom
Base, to delay senescence.
Above-mentioned preferred embodiment or Optimized Measures can also carry out any combination.
Detailed description of the invention
According to detailed description given below and according to the attached drawing of disclosure embodiment, it will the disclosure is more fully understood
Embodiment.In the accompanying drawings, same reference number can indicate identical or functionally similar element.
The flow chart of Fig. 1 bananas juice preparation process preferred embodiment of the present invention.
Example structure schematic diagram is preferably implemented in Fig. 2 microwave heating appts of the present invention.
Fig. 3 is the circuit diagram of the microwave generator with the preferred embodiment for the present invention.
Fig. 4 is the control program embodiment figure of the microwave generator microwave heating with the preferred embodiment for the present invention.
Fig. 5 shows banana slurry temperature after microwave heating treatment of the present invention and the schematic diagram of corresponding color.
Specific embodiment
The present invention provide it is a kind of can effectively inactivate the pipeline type microwave sterilization inactivation equipment for inhibiting Characteristics of Polyphenol Oxidase in Banana and
Banana pulping device, pulping process and obtained banana product with the microwave heating appts.It should be understood that these implementations
Example is provided by way of explanation, should be considered as the limitation to gamut of the present invention without any content.
Bananas juice preparation process of the invention, overall invention thinking include:
Banana after screening is gone to handle with peeling end to end；
Banana pulp is slightly beaten, banana is obtained and slightly starches；
Banana is slightly starched and is transferred to positive pressure of nitrogen sealed pipe type microwave heating appts via closed conduit, is carried out in flow process
Microwave disinfection inactivation treatment；
Banana after above-mentioned sterilization inactivation treatment is slightly starched and carries out thin mashing processing；
Banana slurry after thin mashing is handled well is put into and stirs in blend tank and is deployed according to required drink variety, and
Add water at bananas juice；
Homogeneous is carried out to bananas juice using high pressure homogenizer；
Vacuum Degassing Process is implemented to the bananas juice after homogeneous；
Bananas juice after vacuum outgas is further sterilized；
Bananas juice after further sterilization is subjected to aseptic canning in confined space.
Using above-mentioned prevent-browning bananas juice preparation process, most important feature is: 1) technology prejudice is overcome, in banana pulp
Before expecting microwave heating treatment, thick slurry is first broken into, however it is more thorough to sterilize inactivation.2) it is carried out using closed positive pressure of nitrogen environment
Completely isolated oxygen, avoids slurry from aoxidizing；3) for slurry in conveying by microwave heating, processing is more abundant, does not stay dead angle；4) it mentions significantly
The treatment effeciency of the prior art has been risen, can in a short time, obtain the bananas juice material product of stable color, the product was at 30 minutes
It is interior that chromatic aberration can be kept lower than 15%, strong guarantee is provided for the high quality preparation of banana correlated product.
1 illustrates that the preferred preparation process of bananas juice discusses juice producing process with reference to the accompanying drawing: bananas juice Normal juice content is greater than
20%。
1. banana pre-processes
Optionally using Williams banana as raw material.The best complete yellow maturity of banana, pH=5.3-5.5, Bx=20 are not damaged, without decayed fruit, nothing
Bad fruit, removal is end to end.
2. thick mashing
It is preferred that banana is put into this using the banana peeling juice extractor of the leading light industry and machinery Co., Ltd production in Xinxiang City, Henan Province
Machine carries out mashing processing.Banana skin and flesh first separates, and passes through pipeline from discharge port in the form of slurries after beater is beaten
Transmit the screw conveyor of microwave pipe-line formula sterilization inactivating device.Nitrogen is injected in the pipeline, to completely cut off air, prevents perfume (or spice)
The oxidation of any of several broadleaf plants magma, brown stain.
3. sterilization, enzyme deactivation
Inactivating device is sterilized using microwave pipe-line formula according to the present invention, sterilization treatment is carried out to banana pulp, wherein microwave occurs
The operating parameter of device is as follows: microwave power 80KW, microwave frequency 2450MHz, Microwave Power Density 6W/g, sterilization inactivation
Time is 8 minutes；The microwave power 60KW of isothermal holding, microwave density is in 6W/g, microwave frequency 2450MHz, sterilization inactivation
Between 6 minutes, after enzyme deactivation temperature be 88 DEG C；It will slightly be starched by microwave deactivating enzyme processing banana；
After slurry enters pipeline, completely cut off air completely, thus the browning phenomenon for avoiding banana from occurring in process of production.
Specific pipeline type microwave processing unit is seen below.
4. thin mashing
It is preferred that revolving speed is 2800 rmp, and particle is big using the JMF-120 colloid mill mashing of Guangzhou food mechanical equipment factory production
Small is 13.75-15 μm (micron).When mashing, material: water=1:2.5；While being put into material, it is added in the form of spray
Citric acid, D-araboascorbic acid sodium (citric acid and D-araboascorbic acid sodium are dissolved with water in advance)；Liquid pH=2.5-2.7 is to reach
To the effect for preventing brown stain；Circulation beating is three times.
5. carrying out bananas juice allotment according to drink variety
The material being beaten is put into blend tank, blend tank reaches the allotment of journey experimental facilities Co., Ltd production using Shanghai
Tank；It while stirring, is deployed according to drink variety, and adds water materials allocating at bananas juice；Stirring 10 minutes.
6. homogeneous
It is preferred that using 40-10S homogenizer continuous homogenizing 2 times of the production of Shanghai Dong Hua high pressure homogenizer factory, for the first time in 25-
It carries out under the pressure of 30MPa, is carried out under the pressure of 60-65MPa for the second time.
7. vacuum, degassing
It is preferred that reaching the DC-TJG-50 vacuum degassing machine of journey experimental facilities Co., Ltd production, the parameter of vacuum outgas using Shanghai
For 0.045MPa.
8. sterilization
It is preferred that reaching the DC-UHT-20 tubular sterilization machine of journey experimental facilities Co., Ltd production, sterilization temperature 80-85 using Shanghai
DEG C, the time is 5 seconds.
9. canned
It is preferred that reaching the DC-GZS sterile filling room of journey experimental facilities Co., Ltd production using Shanghai, entire filling apparatus is closed
Space；Canned temperature is 80-85 DEG C.
Microwave pipe-line formula of the present invention sterilizes inactivating device, system and method is sterilized compared to existing microwave tunnel formula
Device has following advantages:
1. without preheating, the time is short, speed is fast, sterilizing, inactivation uniform and complete, so as to more retaining food products nutritional ingredient with
Fragrance.
2. product is not easy coking compared with conventional method low temperature sterilization, it is able to maintain effective component.
3. energy conservation, microwave electric energy conversion efficiency generally 70% or more, microwave be directly to food carry out sterilization treatment its
Body is not heated, because thermal energy damage may be not present.
4. equipment is simple, space, high degree of automation are saved.
5. whole process slurry is carried out in a closed environment, not ingress of air etc., so as to avoid secondary
It is without secondary pollution to pollute whole process.
2-4 illustrates preferred pipeline type micro-wave processing unit and control method used by bananas juice with reference to the accompanying drawing.
It schematically illustrates microwave heating appts used by bananas juice of the present invention and there is the microwave heating appts preferred embodiment
And specific embodiment.Obviously conflict it should be pointed out that excluding those skilled in the art and can determine, it between preferred embodiment can
In any combination, it is not limited to limited preferred embodiment given below, and for technique that the application is not particularly limited
Link and technological means, it is meant that the application does not do particular/special requirement.
In addition, " material " is a kind of upper concept, just refer to banana when product or method are directed to banana.
As shown in Fig. 2, 1 preferred embodiment of the present embodiment microwave heating appts includes microwave heating pipeline 222, it is arranged micro-
Microwave generator 13 on the outside of Wave heating pipeline is connected to the material pusher 224 of the material inlet of microwave heating pipeline, and
It is connected to the storing material equipment 23 of the material outlet of microwave heating pipeline.Material 211 is slightly starched Preparation equipment through banana and (is not shown
Show) spiral propeller 224 is delivered to by pipeline liquid injecting device after processing, it is stirred and is pushed to microwave heating pipe wherein
Road 222.Material pusher 224 is preferably screw material pusher (piston type material pusher or scraper type materiel pusher
Can also be with, but in contrast, it has been found that screw material pusher effect is best).For the temperature for preferably controlling microwave heating
Degree, screw material pusher preferably uses variable-frequency motor 221 to drive, so as to adjust material in microwave processing process
211 pushing speed.It can also advanced optimize to increase material push ability and material handling capacity, spiral propeller as no bar
Formula spiral propeller.For the push effect that can preferably realize material pusher, pusher is at it towards microwave heating equipment
Push side formed taper push face.
To improve microwave deactivating enzyme effect, microwave heating pipeline is closed and by positive pressure of nitrogen device 22 in material inlet
Nitrogen is filled with to maintain positive pressure in pipeline and with the flow velocity of conveying direction identical as material.Preferably, the positive pressure of nitrogen dress
The nitrogen pressure control of addition is set in 1.2 ~ 1.5 times of atmospheric pressure, nitrogen flow rate is in 4-10m3/min.It is further preferred that micro-
The outlet side of Wave heating pipeline also sets up nitrogen pressure relief device 26, so that material is via microwave heating pipeline to bunkerage
The nitrogen from pipeline type microwave processing unit is discharged by the nitrogen pressure relief device for being connected to microwave heating pipeline before.
To improve temperature control precision, pipeline type microwave processing unit of the invention preferably includes multiple microwave generators.
Preferably, the length of microwave heating pipeline 222 is about 10 meters, and perfectly even 40-60 microwave hair is arranged in interval in its axial direction
Raw device, more preferably from about 45-55 microwave generator, then preferably 50.Each microwave generator is respectively in microwave heating pipeline
The circumferential metal ring cavity for forming microwave reflection, and each microwave generator can be controlled individually.
Fig. 2 schematically illustrates microwave heating pipeline according to the preferred embodiment of the present invention and microwave generator part
Sectional view.As shown in Fig. 2, microwave heating pipeline 222 includes conveying inner tube 121 and conveying outer tube 122, conveying inner tube and conveying are outer
The annular chamber 100 for accommodating material is formed between pipe.Microwave generator 13 is circumferentially around conveying outer tube arrangement comprising reflection
Metal-back 11, heat resistant plastics' shell 123, microwave stirrer 136, magnetron 133, high-voltage diode 134 and transformer 135.
Conveying inner tube 121 and conveying outer tube 122 are made of the material for not generating micro-wave screening and microwave absorption.Preferably,
The conveying inner tube and conveying outer tube are made of soft silica gel.
Magnetron 133 generates microwave, and microwave stirrer 136 can carry out circumferential microwave heating to material.
As shown in the partial enlarged view in Fig. 2, convey inner tube 121 has tepee structure at material inlet, in order to
Material enters annular chamber 100.Material 211 enter conveying inner tube 121 and convey outer tube 122 between annular chamber 100, there into
Row microwave heating treatment.Pipeline type microwave processing unit of the invention further includes temperature of charge monitoring unit (not shown), the temperature
Degree monitoring unit may be provided between microwave generator 13, to monitor temperature of charge, it is preferred that microwave generator entrance goes out
Mouth and microwave generator are provided with temperature sensor between any two.
Fig. 3 is the circuit diagram according to the microwave generator of the preferred embodiment for the present invention.As seen from Figure 3, microwave generator
The Microwave emission amount of magnetron determine that and the size of the voltage and outlet side is current related by the voltage for inputting its both ends.
The present embodiment is more by the circuital current (illustrate in attached drawing 2,1371/1372) of multiple thermal switch 137 control outlet side
A thermal switch can individually be implemented, and implementation can also be combined, and change the electric current in circuit, and then change and be applied to microwave
Voltage and microwave power on device.
Preferably to realize microwave heating time, heating power, power density and the control of material pushing speed, this hair
Control system has also been devised in bright preferred embodiment.Preferably, pipeline type microwave processing unit further includes control system 17, the control
System processed includes mentioned-above temperature of charge monitoring unit 171, and temperature monitoring unit includes being arranged in multiple microwave generators
Between to monitor the temperature sensor 1711 of temperature of charge；Described control unit further includes microwave control unit 172, to list
The solely starting of how each microwave generator of control and heating time.It is further preferred that the microwave control system further includes center
Microprocessor 174, when the temperature of charge that temperature monitoring unit monitors not within the set range when can carry out microwave power and/or
Microwave density and/or the adjustment of motor material conveying speed.It is further preferred that the microwave control system further includes pressure control
The nitrogen level in refined jasmine monitoring meter monitoring pipeline type microwave processing unit is arranged, on nitrogen valve to control nitrogen in unit 175
The nitrogen charging amount and nitrogen flow speed of gas positive pressure devices.It is further preferred that the control system further includes predetermined system 176,
So that microwave control unit and the screw rod material pusher motor control unit can join according to preset material variety and material
Number applies preset microwave power, microwave density and microwave heating time automatically, the parameter of materials can be material variety,
Temperature, humidity, viscosity, pol etc..So that temperature of charge is not only able to accurately be monitored in time, moreover it is possible to accurately can be with
It is realized by microwave power, microwave heating time, Microwave Power Density, the control of material pushing speed.In specific embodiment party
In formula, microwave density can be adjusted by changing current value.Microwave heating time and material pushing speed can pass through together
Electric machine frequency adjusts material conveying speed and realizes, naturally it is also possible to using the skilled addressee will appreciate that other modes come
It realizes.
Fig. 4 illustrates the preferred microwave heating control method of the present embodiment and process: and operation starts → and master switch obtains electric → system
Processing parameter setting needed for automatic running → carry out microwave heating (according to inventory, the object of mass flow and required control
Material temperature degree sets microwave power, power density, nitrogen pressure, adjustment) → required microwave generator is opened according to setup parameter
Number and power → positive pressure of nitrogen device, which are opened, starts nitrogen charging, and pressure is in 1.2 times ~ 1.5 times atmospheric pressure → temperature sensors, air pressures
Monitoring meter starts monitoring temperature of charge, nitrogen pressure → banana is slightly starched to prepare and be conveyed to microwave heating equipment → microwave heating and be killed
Treated that banana raw juice stores for bacterium enzyme deactivation → will carry out.
Preferably, control is under these parameter areas we have found that effect is more preferable: configuration Three-phase five-wire 380V ± 10%,
The alternating current of 50Hz ± 1%, capacity are no less than 220KVA.Control Microwave Power Density be 4-8W/g, mass flow 2-4t/h,
Temperature is controlled at 75 DEG C ~ 93 DEG C, it is further preferred that the general power of entire generator is no more than 146kW；Microwave Power Density is
6W/g；Mass flow is 3t/h；Temperature is controlled at 75 DEG C ~ 88 DEG C, and general power≤146kW of entire generator makes power stepless
Adjustable, the rated output power 1200W of each Microwave emission point, totally 50 launch point power densities are 6w/g.
In actual motion, positive pressure pipeline type microwave processing unit preferably first implements microwave power 60-120kW, power density
For 6w/g, frequency 2450MHZ, sterilizing inactivation time is 5-10 minutes, when material is monitored to temperature in microwave heating appts
When reaching 75 DEG C ~ 93 DEG C of predetermined temperature, preferred 75 DEG C ~ 88 DEG C, microwave heating appts switch to constant temperature zone automatically, control at microwave
Reason device microwave power is 20-60KW, 6w/g, frequency 2450MHZ, and time 3-8 minute makes material maintain the temperature at 75 DEG C ~ 93
DEG C, preferred 75 DEG C ~ 88 DEG C, more preferably 88 DEG C.Thus design, this kind of disposal options, both avoided material heating it is excessively high to
Materials quality brings damage, also avoids unnecessary energy dissipation.
The detailed description of embodiment above is not all embodiments within the context of the present description that the present inventor is considered
Exhaustive description.
Really, it will be appreciated by persons skilled in the art that certain elements of above embodiment can carry out various combination or disappear
Divided by the more embodiments of generation, and such more embodiments are fallen within this specification range and introduction.To this field
For technical staff, it will also be apparent that, above embodiment can combine in whole or in part, fall into this explanation to generate
Additional embodiment in book range and introduction.
Therefore, it although describing specific embodiment based on illustrative purpose, falls into each within the scope of this specification
Kind of equivalent embodiments be it is possible, as the skilled person will realize.Embodiment provided herein is not limitation
The present invention is only embodiment described above and shown in the drawings.Therefore, the reaction of above embodiment should be by appended right
It is required that determining.
Claims (9)
1. a kind of bananas juice preparation process, comprising: removed to handle the banana after screening with peeling end to end；By banana pulp into
The thick mashing of row, obtains banana and slightly starches；Banana is slightly starched and is transferred to positive pressure of nitrogen sealed pipe type microwave treatment via closed conduit
Device carries out microwave disinfection inactivation treatment in flow process；It is thin that banana after above-mentioned sterilization inactivation treatment is slightly starched to progress
Mashing processing；Banana slurry after thin mashing is handled well is put into and stirs in blend tank and is adjusted according to required drink variety
Match, and adds water at bananas juice；Homogeneous is carried out to bananas juice using high pressure homogenizer；Vacuum outgas is implemented to the bananas juice after homogeneous
Process；Bananas juice after vacuum outgas is further sterilized；Bananas juice after further sterilization is subjected to nothing in confined space
Bacterium is canned.
2. bananas juice preparation process as described in claim 1, it is characterised in that: the thick pulping process does not add any water
Point, the banana meat is sent by what is stirred while conveying to microwave heating in the closed conduit in the form of slurries, excellent
By injection nitrogen in the pipeline of choosing, playing isolation air effect prevents banana raw juice oxidizing brown stain；It is further preferred that described
Banana slightly starch in closed conduit by screw material pusher realize on one side pushes convey while mixing effect.
3. the bananas juice preparation process as described in any one of aforementioned claim, it is characterised in that: in the microwave processing process
Nitrogen pressure control in 1.2 ~ 1.5 times of atmospheric pressure, nitrogen flow rate is defeated in 4-10m3/min and flow direction and banana slurry
Send direction identical；It is further preferred that the nitrogen is filled in the pipeline type microwave processing unit feed inlet side, at microwave
It manages device discharge port side and is equipped with nitrogen pressure release means.
4. the bananas juice preparation process as described in any one of aforementioned claim, it is characterised in that: the high-pressure homogeneous process is
It is secondary, preferably first time pressure -40MPa, second of pressure 50-80MPa.
5. the technique as described in any one of aforementioned claim, it is characterised in that: the sterilization temperature is 80-85 DEG C, preferably when
Between be 5-8 seconds.
6. the technique as described in any one of aforementioned claim, it is characterised in that: above-mentioned canned entire filling apparatus is closed
Space；It is preferred that canned temperature is 80-85 DEG C.
7. the technique as described in any one of aforementioned claim, it is characterised in that: colloid mill mashing, slurrying can be used in above-mentioned slurrying
When, preferred feed: water volume ratio=1:2.0-3.0；While being put into material, more preferably in the form of spray be added citric acid,
D-araboascorbic acid sodium, and controlling pH value is 2.2-3.0.
8. the technique as described in any one of aforementioned claim, it is characterised in that: the microwave processes process is divided into main place
Manage section and isothermal holding section, the main process task section microwave power, microwave density, heating time are greater than soaking zone microwave power, micro-
Bomi degree, heating time；Preferably, the microwave power 60-12OKW of the main process task section microwave treatment, such as 85KW, Microwave Frequency
Rate 2000-2800MHz, such as 2450MHz are sterilized inactivation time 5-10 minutes；The microwave power 20- of soaking zone microwave treatment
6OKW, such as 45KW, microwave frequency 2000-2800MHz, such as 2450MHz are sterilized inactivation time 3-8 minutes；Specific implementation
Power density is 4-8W/g, preferably 6 W/g；It is highly preferred that temperature at the end of two sections of microwave treatments is 75-93 DEG C, preferably 88
℃。
9. a kind of pipeline type microwave processing unit applied to any one of the claim 1-8 technique, comprising: microwave adds
Heat pipeline, the microwave heating pipeline include conveying inner tube and conveying outer tube, are formed and are used between conveying inner tube and conveying outer tube
Accommodate the annular chamber of material；The multiple microwave generators being located on the outside of the conveying outer tube；And it is connected to the microwave heating
The material pusher of the material inlet of pipeline, the material enter microwave heating by material inlet under the promotion of material pusher
Pipeline is handled under microwave field action, it is characterised in that: the microwave heating pipeline is closed, the material push
Device is screw material pusher and is driven by variable-frequency motor, and nitrogen charging device is arranged at the material inlet of microwave heating pipeline,
Make material in the microwave heating pipeline under barotropic state；The multiple microwave generator along microwave heating pipeline axis
It is arranged to interval, and each microwave generator is respectively in the circumferential metal ring cavity for forming microwave reflection of conveying outer tube, each microwave hair
The magnetron of raw device can be controlled individually.
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| CN201810720383.8A CN108936139A (en) | 2018-07-04 | 2018-07-04 | A kind of preparation method and equipment of bananas juice |
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Cited By (4)
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| CN110916059A (en) * | 2019-11-28 | 2020-03-27 | 广西铂洋果业科技有限公司 | Method for treating mould in banana pulp processing process |
| CN110916062A (en) * | 2019-11-20 | 2020-03-27 | 广西铂洋果业科技有限公司 | Method for preventing browning in pulping process of banana processing |
| CN110973455A (en) * | 2019-11-28 | 2020-04-10 | 广西铂洋果业科技有限公司 | Method for preventing browning of banana pulp in high-temperature sterilization process |
| CN111567813A (en) * | 2020-04-26 | 2020-08-25 | 安徽省金宜食品有限公司 | Fruit juice extraction equipment for beverage production |
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