CN104171767A - High-voltage pulsed electric field sterilizing system coaxial processing chamber with adjustable runner shape - Google Patents
High-voltage pulsed electric field sterilizing system coaxial processing chamber with adjustable runner shape Download PDFInfo
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- CN104171767A CN104171767A CN201410389160.XA CN201410389160A CN104171767A CN 104171767 A CN104171767 A CN 104171767A CN 201410389160 A CN201410389160 A CN 201410389160A CN 104171767 A CN104171767 A CN 104171767A
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- electrode
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- inner chamber
- flow channel
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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
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
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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
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
Abstract
The invention discloses a high-voltage pulsed electric field sterilizing system coaxial processing chamber with an adjustable runner shape. The high-voltage pulsed electric field sterilizing system coaxial processing chamber comprises a circular metal high-voltage electrode with a wiring end, a grounding electrode regulating rod with a cylindrical ring center, two insulation inner cavities with different runner shapes and an insulation outer cavity. The two insulation inner cavities are located at two sides of the high-voltage electrode, embedded in the insulation outer cavity, and are connected with the insulation outer cavity and a high-voltage electrode slice through sealing rings to form a sealing structure. According to the high-voltage pulsed electric field sterilizing system coaxial processing chamber, through replacing the high-voltage electrode slices of different internal circle diameters, the space between the electrodes is adjustable, the internal circle and the excircle of the electrode slice are chamfered, and thus a peak electric field near the electrode is reduced. The high-voltage pulsed electric field sterilizing system coaxial processing chamber is simple in structure and convenient to disassemble; and the runner shapes can be changed according to different food material characteristics so that the electric field strength and the flow characteristics in the processing chamber are improved.
Description
Technical field
The present invention relates to the coaxial process chamber of a kind of high-pressure pulse electric sterilization, is the coaxial process chamber of the variable high-pressure pulse electric sterilization of a kind of flow channel shape specifically.
Along with the raising day by day of living standard, people are to the food quality demand height that more rises gradually.For keeping the minimal losses of food sense organ and nutritive value, non-thermal sterilization technology starts to be widely used in food processing, high-pressure pulse electric (PEF) sterilization technology is one of non-thermal sterilization technology of tool Industry Development Prospect, it is good that PEF sterilization has bactericidal effect, generally can reduce 6 logarithm periods, and sterilizing time is short, sterilization temperature rise is low, on the chemical composition of food, outward appearance and local flavor etc., substantially without impact, energy consumption is little, to advantages such as environment are substantially pollution-free.
A complete PEF system mainly comprises four parts: impulse generator, process chamber, fluid handling system and auxiliary monitoring system.Process chamber is the important component part of PEF disinfection system, and it is used for loading pending material and deposits electrode, and directly applies high-pressure pulse electric in process chamber.Process chamber generally consists of the insulating material of two electrodes and loading electrode.Whether according to material, flow, process chamber is divided into static type and continous way; According to the form of electrode, be divided into flat, coaxial-type and three kinds of formulas altogether.
Electric-field intensity is the greatest factor that affects high-pressure pulse electric sterilization effect, and along with the increase of electric-field intensity, bactericidal effect obviously strengthens.In order to ensure good bactericidal effect, electric-field intensity general control is within the scope of 20-70kV/cm, and the square-wave pulse width that high-voltage pulse generator produces is controlled in 1～10 μ S.Generally adopt in the world at present a process chamber altogether to carry out high-pressure pulse electric sterilization, but a process chamber treating capacity is little altogether, the demand that cannot adapt to commercial scale treating capacity, in addition after a process chamber machines altogether, electrode spacing cannot change, liquid material flow behavior also cannot change, and the food material of different qualities needs abundant mixing just can reach good bactericidal effect in process chamber, and obviously a process chamber cannot meet the demands altogether.Electric-field intensity distribution in process chamber depends on process chamber intracavity structure, the high voltage that high-voltage pulse generator produces, and burst pulse, the technical difficulty such as high-frequency are large, and cost is high, and these problems have directly restricted development and the application of high voltage pulsation electric-field sterilizing tech.
Summary of the invention
The invention provides the coaxial process chamber of the variable high-pressure pulse electric of a kind of flow channel shape, object is to solve the problems such as current process chamber electrode spacing is fixed, electric-field intensity distribution is immutable, the interior mixing of materials of process chamber is inhomogeneous.The present invention produces under identical square-wave pulse condition at impulse generator, by changing electrode spacing, improve electric-field intensity distribution, change insulation intracavity structure, different material is fully mixed in process chamber, reach better bactericidal effect, promote development and the application of high voltage pulsation electric-field sterilizing tech.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is as follows:
The coaxial process chamber of the high-pressure pulse electric sterilization system that a kind of flow channel shape is variable is by the circular metal high voltage electrode slice with terminals, columned earth electrode bar, insulated left side inner chamber body, side insulation right inner chamber body, charging aperture, discharging opening and insulation outer chamber form, insulated left side inner chamber body and side insulation right inner chamber body are designed to detachable, with the common formation processing chamber of metal high voltage electrode body, charging aperture passage passes through mutually with insulation outer chamber passage, discharging opening passage axis and earth electrode rod axis conllinear, earth electrode bar adopts internal thread to be connected with insulation outer chamber.There is scale earth electrode bar outer end, for controlling the flow of the process chamber of flowing through.High-field electrode inner circle central shaft, earth electrode bar central shaft axiality are 0.02mm, pass through high-tension electricity pole piece and the insulation inner chamber body of rounding by replacing, can change electrode spacing.Rounded corner has reduced near the spike electric field existing electrode in high-field electrode, avoids Liao Yin internal field too high and cause " electric discharge " problem, and can obtain the comparatively uniform electric-field intensity of distribution.
For guaranteeing stable durability and the foodsafety of process chamber, the material of metal high voltage electrode and earth electrode bar is all selected Stainless steel 316 L, and insulating material is selected high temperature resistant, corrosion resistant polytetrafluoroethylene (PTFE) (PTFE).
The coaxial process chamber of high-pressure pulse electric sterilization system that flow channel shape provided by the invention is adjustable can be adjusted process chamber intracavity structure according to different liquids food material, both can change the treating capacity for the treatment of material, can improve again stream material characteristic in process chamber, the chamfering of metal high voltage electrode slice inside and outside circle has reduced near the maximum electric field intensity occurring electrode inner circle, increase the ceiling voltage that process chamber can bear, guaranteed security of system.The present invention is simple in structure, with low cost, easy to process, be convenient to dismounting, can promote development and the application of high voltage pulsation electric-field sterilizing tech.
Accompanying drawing explanation
Fig. 1 is process chamber generalized section of the present invention
Fig. 2 is the profile diagram of metal high voltage electrode
Fig. 3 is the left view of Fig. 1 of the present invention
Fig. 4 is the process chamber cavity electric-field intensity distribution figure of not chamfering
Fig. 5 is the process chamber cavity electric-field intensity distribution figure after chamfering
Fig. 6 is universal coaxial process chamber Flow Field Distribution figure
Fig. 7 is the adjustable coaxial process chamber Flow Field Distribution figure of flow channel shape
The specific embodiment
Below in conjunction with the drawings and specific embodiments, content of the present invention is elaborated:
As shown in Figure 1, the coaxial process chamber of high-pressure pulse electric sterilization system that a kind of flow channel shape provided by the invention is adjustable is by the circular metal high voltage electrode slice (1) with terminals, be positioned at circle ring center and become columned earth electrode bar (2), insulated left side inner chamber body (3), side insulation right inner chamber body (4), charging aperture (5), discharging opening (6) and insulation outer chamber (7) form, high-field electrode is embedded in the indoor cavity of formation processing between insulated left side inner chamber body (3) and side insulation right inner chamber body (4), the external cylindrical surface of insulated left side inner chamber body insulator (3) and right side inner chamber body insulator (4) adopts interference fits to be connected with the inner cylinder face of insulation outer chamber (7), between its end face and insulation outer chamber (7) and metal high voltage electrode (1), use sealing ring to seal, charging aperture (5) passage passes through mutually with insulation outer chamber (7) passage, perpendicular to earth electrode bar (2), discharging opening (6) passage axis and earth electrode bar (2) axis conllinear, earth electrode bar (2) adopts internal thread to be connected with insulation outer chamber (7).By change different in the high-tension electricity pole piece (1) of circular diameters to realize electrode spacing adjustable, electrode slice inside and outside circle all carries out chamfering, reduces near the spike electric field existing electrode.The present invention is simple in structure, and convenient disassembly can improve according to different food material characteristic changing flow channel shapes process chamber internal electric field intensity and stream material characteristic.
The material of metal high voltage electrode and earth electrode bar is all selected Stainless steel 316 L, and insulating material is selected high temperature resistant, corrosion resistant polytetrafluoroethylene (PTFE) (PTFE).As shown in Figure 2, its terminals are used smooth circular arc to be connected with part in process chambers to the profile of metal high voltage electrode, and the fillet that outline and the equal actionradius of interior profile are 0.2mm, can avoid the appearance of electric field spike, prevents electric discharge.
Fig. 4 and Fig. 5 are respectively the high-tension electricity pole piece electric-field intensity distribution figure of the process chamber cavity after chamfering and chamfering not of coaxial process chamber.When high-voltage pulse generator output voltage is 10kV, when the distance between high-tension electricity pole piece and earth electrode is 3mm, Fig. 4 can find out that the intersection at electrode and insulator has obvious spike electric field, electric-field intensity peak value in process chamber reaches 72.089kV/cm, and local too high electric-field intensity distribution easily causes appearance " electric discharge " problem in process chamber.And Fig. 5 high-field electrode and insulator maximum electric field intensity is contiguously only 58.798kV/cm, comparison diagram 4, the structural change of Fig. 5 has been avoided the too high spike electric discharge causing of local electric field strength and the system failure that may cause.
Universal coaxial sterilization processing chamber, Novel coaxial sterilization processing chamber Flow Field Distribution figure are as shown in Figure 6, Figure 7.In the simulation model of coaxial sterilization processing chamber, the flow velocity (rate of flow of fluid is 0.4m/s) that fluid foods enters sterilization processing chamber inlet is all the same.In figure, motion pattern shows that the flow regime of the fluid foods that universal coaxial sterilization processing is indoor is more steady, and the flow regime of material presents obvious turbulence state after Novel coaxial sterilization processing chamber change insulator flow channel shape, fluid foods, in the indoor abundant mixing of sterilization processing, can make PEF sterilization processing more even.
Although the present invention with preferred embodiment openly as above; but it is not intended to limit the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; can do various changes and modification, so protection scope of the present invention should be with being as the criterion that claims were defined.
Claims (8)
1. the coaxial process chamber of high-pressure pulse electric sterilization system that flow channel shape is adjustable, it is by the circular metal high voltage electrode (1) with terminals, be positioned at circle ring center and become columned earth electrode bar (2), insulated left side inner chamber body (3), side insulation right inner chamber body (4), charging aperture (5), discharging opening (6) and insulation outer chamber (7) form, insulated left side inner chamber body (3) and side insulation right inner chamber body (4) are embedded in insulation outer chamber, high-field electrode is embedded in the indoor cavity of formation processing between insulated left side inner chamber body (3) and side insulation right inner chamber body (4), charging aperture (5) passage passes through mutually with insulation outer chamber (7) passage, discharging opening (6) passage axis and earth electrode bar (2) axis conllinear, it is characterized in that: earth electrode bar (2) adopts internal thread to be connected with insulated left side body (3).
2. the adjustable coaxial process chamber of high-pressure pulse electric sterilization system of a kind of flow channel shape according to claim 1, is characterized in that there is scale earth electrode bar outer end, for controlling the flow of the process chamber of flowing through.
3. the adjustable coaxial process chamber of high-pressure pulse electric sterilization system of a kind of flow channel shape according to claim 1, is characterized in that left insulation inner chamber body (3), side insulation right inner chamber body (4) are connected with metal high voltage electrode body (1) by sealing ring.
4. the adjustable coaxial process chamber of high-pressure pulse electric sterilization system of a kind of flow channel shape according to claim 1, is characterized in that charging aperture (5) is vertical with the axis of earth electrode bar (2).
5. the adjustable coaxial process chamber of high-pressure pulse electric sterilization system of a kind of flow channel shape according to claim 1, is characterized in that high-field electrode axis is vertical with earth electrode axis, and electrode tip inner circle central shaft is coaxial with earth electrode bar central shaft.
6. the high-pressure pulse electric sterilization system coaxial process chamber adjustable according to a kind of flow channel shape described in claim 1-5, is characterized in that the replaceable different flow channel shape of insulated left side inner chamber body and side insulation right inner chamber body.
7. the high-pressure pulse electric sterilization system coaxial process chamber adjustable according to a kind of flow channel shape described in claim 1-5, the process chamber inwall that it is characterized in that metal high voltage electrode (1) adopts transition arc to be connected with wiring place, and the outline of electrode and interior contour edge all have fillet.
8. the high-pressure pulse electric sterilization system coaxial process chamber adjustable according to a kind of flow channel shape described in claim 1-5, is characterized in that, by changing high-tension electricity pole piece and the insulation inner chamber body of interior rounded corner, can changing electrode spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410389160.XA CN104171767A (en) | 2014-08-08 | 2014-08-08 | High-voltage pulsed electric field sterilizing system coaxial processing chamber with adjustable runner shape |
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| CN201410389160.XA CN104171767A (en) | 2014-08-08 | 2014-08-08 | High-voltage pulsed electric field sterilizing system coaxial processing chamber with adjustable runner shape |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712444A (en) * | 2016-03-09 | 2016-06-29 | 佛山市云米电器科技有限公司 | Control mode of sterilization equipment |
| CN107348310A (en) * | 2017-05-31 | 2017-11-17 | 江南大学 | A kind of electrode edge inlays the low temperature plasma sterilization processing chamber of insulator |
| CN107410822A (en) * | 2017-05-11 | 2017-12-01 | 江南大学 | A kind of common field process chamber of the high-pressure pulse electric sterilization system based on fluid behaviour optimization |
| CN107572064A (en) * | 2017-09-18 | 2018-01-12 | 安徽师范大学 | A kind of sealing sterilizing unit for food packing device |
| CN108079324A (en) * | 2018-02-26 | 2018-05-29 | 中国工程物理研究院流体物理研究所 | A kind of coaxial configuration formula uniform flow cavity for high-voltage pulse electric field sterilization |
| CN110200201A (en) * | 2019-07-03 | 2019-09-06 | 中新国际联合研究院 | A kind of multistage Pulsed Electric Fields continuity sterilizing unit and method |
| CN111248393A (en) * | 2020-02-27 | 2020-06-09 | 西安交通大学 | Fluid food synergistic sterilization device and method |
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| CN102640965A (en) * | 2011-11-11 | 2012-08-22 | 江南大学 | High voltage pulse electric field sterilization common-field treatment chamber with adjustable electrode distance |
| CN103421664A (en) * | 2013-07-31 | 2013-12-04 | 浙江大学 | Instantaneous sterilization device based on high-voltage pulse electric field technology for yellow wine before bottling |
| CN204180838U (en) * | 2014-08-08 | 2015-03-04 | 江南大学 | The high-pressure pulse electric sterilization system coaxial process chamber that a kind of flow channel shape is adjustable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712444A (en) * | 2016-03-09 | 2016-06-29 | 佛山市云米电器科技有限公司 | Control mode of sterilization equipment |
| CN107410822A (en) * | 2017-05-11 | 2017-12-01 | 江南大学 | A kind of common field process chamber of the high-pressure pulse electric sterilization system based on fluid behaviour optimization |
| CN107348310A (en) * | 2017-05-31 | 2017-11-17 | 江南大学 | A kind of electrode edge inlays the low temperature plasma sterilization processing chamber of insulator |
| CN107572064A (en) * | 2017-09-18 | 2018-01-12 | 安徽师范大学 | A kind of sealing sterilizing unit for food packing device |
| CN108079324A (en) * | 2018-02-26 | 2018-05-29 | 中国工程物理研究院流体物理研究所 | A kind of coaxial configuration formula uniform flow cavity for high-voltage pulse electric field sterilization |
| CN110200201A (en) * | 2019-07-03 | 2019-09-06 | 中新国际联合研究院 | A kind of multistage Pulsed Electric Fields continuity sterilizing unit and method |
| CN110200201B (en) * | 2019-07-03 | 2024-03-26 | 中新国际联合研究院 | Multistage high-strength pulse electric field continuity sterilization device and method |
| CN111248393A (en) * | 2020-02-27 | 2020-06-09 | 西安交通大学 | Fluid food synergistic sterilization device and method |
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