CN1623448A - Prepolarized pulse electric field disinfectant method and its equipment - Google Patents
Prepolarized pulse electric field disinfectant method and its equipment Download PDFInfo
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- CN1623448A CN1623448A CN 200410077405 CN200410077405A CN1623448A CN 1623448 A CN1623448 A CN 1623448A CN 200410077405 CN200410077405 CN 200410077405 CN 200410077405 A CN200410077405 A CN 200410077405A CN 1623448 A CN1623448 A CN 1623448A
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Abstract
A prepolaried pulsive electric field method for sterilizing material includes such steps as prepolarizing the raw material in an electrostatic field, and sterilizing in a high-voltage pulsive electric field. Its equipment is composed of raw material tank, pump, vacuum degassing unit, high-voltage electric pulse generator, electric pulse treating chamber, and prepolarizing unit. Its advantage is high effect to kill bacteria and deactivate enzyme.
Description
Technical field
The present invention relates to a kind of pasteurisation technology, particularly a kind of method and equipment thereof that adopts pre-polarization pulse electric field food, biology and fine chemical material etc. to be carried out pasteurisation.
Background technology
Traditional sterilizing methods can be divided into two kinds of chemical method and physics methods: chemical method mainly is to adopt chemosterilant that vessel and environment are carried out disinfection, and can not be applied directly on the food; The physics method mainly contains the heat sterilization method, but heat treatment has bigger infringement to the exterior qualities such as nutrition, local flavor and color and luster of food, also can cause some problems in the process.With the milk sterilization is example, enterprise generally adopts ultra high temperature short time sterilization now, promptly milk is carried out high-temperature sterilization about 3 seconds at 137 ℃, milk after this method is handled has the tangible high temperature smell of burning, color and luster flavescence, natural milk to reduce and produces protein denaturation precipitation (follow-up homogeneous operation can be covered this influence), even more serious is to cause a large amount of denatured protein to condense on the pipeline, cause line clogging, clean very inconvenience.Therefore, the sterilizing methods of seeking the efficient cryogenic practicality becomes the common heartfelt wishes of vast relevant enterprise.
The non-heat-sterilization technique of low temperature claims the cold sterilization technology again, is exactly extremely not to be the sterilizing methods of dominant mechanism with thermic, and now comparative maturity has irradiation and a high static pressure treatment technology etc.Irradiation technique is used in a large number in the solid-state and sterilization of packaged food, and its effect is very good, and a lot of export food adopt this technology.High static pressure technology only is applicable to small-scale intermittently operated at present, and its sterilization effect has also obtained the industry approval, and the health food of some high added values adopts this technology sterilization.But irradiation technique has residual, and the subsequent affect of food security, health is still waiting to do further long-acting demonstration; And high static pressure technology is not suitable for large-scale continuous production.
The more pasteurisation technology of report is the high-voltage pulse electric field sterilization both at home and abroad in recent years, has announced a kind of high voltage method for disinfection and device as Japanese Patent Laid communique 2000-262261; Japanese Patent Laid communique 2000-279146 has announced a kind of liquid material method for disinfection that adopts high-tension electricity to handle; U.S. Pat 5690978 has been announced the high-voltage pulse electric field processing chamber design that a kind of liquid towards material is handled; U.S. Pat 5048404 has been announced a kind of high voltage pulse treatment system that prolongs the pumpable food product commodity price phase, aforementioned these technology all relate to the high-strength impulse electric field of employing food material are carried out sterilization treatment, before entering high-strength impulse electric field, be not subjected to the less DC electrostatic field of another field intensity in advance and handle but relate to material, make material polarize in advance, with the top electric charge to strengthen the method for sterilization effect.
Application number is that 00259888 Chinese patent has been announced a kind of high-voltage pulse drinking water sterilization instrument; Application number is that 00220522 Chinese patent has been announced the cold sterilizing unit of a kind of liquid electric pulse; Application number be 03220551 Chinese patent announced a kind of continuously/semi continuous high intensity pulses magnetic field disinfection equipment.The Chinese patent 01130064 that the inventor applied for has been announced a kind of high-voltage pulse electric field sterilization method, reaches the high-voltage pulse electric field sterilization device of mainly being made up of high-voltage pulse electricity generating means, parameter measurement, demonstration and regulation device, shielding and automatic safety device, high-voltage pulse electric field processing chamber according to this method design; Another part Chinese patent 02152160 of inventor's application has been announced a kind of processor of impulse electric field sterilizing installation.Above-mentioned these technology also are not specifically related to the pre-polarization pulse electric field treatment of electrostatic field technology.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, a kind of Prepolarized pulse electric field disinfectant method that improves the existing high-voltage pulse electric field sterilization and the enzyme effect of going out is provided.
Another object of the present invention is to provide a kind of Prepolarized pulse electric field disinfectant equipment of realizing said method.
Purpose of the present invention is achieved through the following technical solutions: this Prepolarized pulse electric field disinfectant method comprised the steps: before high-voltage pulse electric field sterilization, the processing that earlier material polarized in electrostatic field in advance, and described electrostatic field field intensity is 100～1000V/cm.
The pre-polarization processing time of described material was less than 3 seconds.
It is 20～100kV/cm that described high-pressure pulse electric is handled field intensity, and pulse width is 1～100 microsecond, and frequency is 1～30kHz.
According to different material kinds and electrical conductivity situation, can adjust pre-polarization electrostatic field intensity, to improve follow-up impulse electric field sterilization effect.
The Prepolarized pulse electric field disinfectant equipment of realizing preceding method comprises material-storage jar, pump, vacuum degasser, high-voltage pulse electric generator, electric pulse process chamber, it is characterized in that: also comprise the pre-polarization treatment device that is connected to form by dc source and the pre-electrode that polarizes process chamber.
The configuration of electrodes of described pre-polarization process chamber can be concentric cylinder type, and promptly described electrode comprises inside and outside cylinder electrode, the coaxial setting of described inside and outside cylinder electrode.
The configuration of electrodes of described pre-polarization process chamber also can be the pole drum type brake, and promptly described electrode comprises electrode in cylindrical shape external electrode and the round bar shape, electrode and the coaxial setting of cylindrical shape external electrode in the round bar shape.
The configuration of electrodes of described pre-polarization process chamber also can be the parallel flat formula, and promptly described electrode is two planar electrodes that be arranged in parallel.Two planar electrodes can be arranged in the insulation frame.
With material electrodes in contact surface insulating barrier is set in the described pre-polarization process chamber; The preferable range of described thickness of insulating layer is 0.3～1.5mm.
The electrode distance of described pre-polarization process chamber can suitably be adjusted according to the treating capacity of material, and when treating capacity was big, electrode distance increased, the corresponding increase of input voltage.
Described insulating layer material can be polytetrafluoroethylene (PTFE).
Described dc source adopt voltage can be between 0～3KV continuously adjustable commutator transformer.
The mechanism of action of the present invention is: food system is the electrically charged system of more complicated, there are various ions, molecule, micel and congeries to exist, as inorganic ion, amino acid, protein, polypeptide, carbohydrate and vitamin etc., charged functional group is at all times, exist everywhere, basic reason that impulse electric field handles can sterilize to material that Here it is; Before material enters high-pressure pulse electric, be subjected to the less DC electrostatic field of another field intensity in advance and handle, can make that charged particles in the material is directed to be moved and assemble, strengthen follow-up high-voltage pulse electric field sterilization effect.Because electrolyte solution is subjected to when dc static is handled electrochemical reaction taking place, thereby directly contacts with battery lead plate metal part for fear of material, can spray the thin layer insulating materials in the metal surface.
The present invention compared with prior art has following advantage and effect:
(1) high-strength impulse electric field sterilization technology can be applicable to effectively,, sterilizing efficiency can be improved more than 30% by enhancing sterilization effect that material is polarized in advance; And when obtaining good bactericidal effect, can effectively improve and go out the enzyme effect more than 10%.
(2) can adjust pre-polarization electrostatic field intensity flexibly at different material characteristic (one-tenth is grouped into, electrical conductivity etc.), improve follow-up sterilizing rate at different material effectively.
(3) under the prerequisite that obtains identical sterilization effect, the impulse electric field strength that use of the present invention can reduce follow-up sterilization effectively helps to improve the treating capacity of impulse electric field disinfection system more than 25% more than 15%.
Description of drawings
Fig. 1 is the structural representation of Prepolarized pulse electric field disinfectant equipment of the present invention.
Fig. 2 is the structural representation of the pre-polarization process chamber of Prepolarized pulse electric field disinfectant equipment shown in Figure 1; Wherein Fig. 2 (a) is a profile, and Fig. 2 (b) is a vertical view.
Fig. 3 is the schematic diagram of another structure of the pre-polarization process chamber of Prepolarized pulse electric field disinfectant equipment shown in Figure 1; Wherein Fig. 3 (a) is a profile, and Fig. 3 (b) is a vertical view.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
Concrete structure of the present invention as depicted in figs. 1 and 2, as seen from Figure 1, this Prepolarized pulse electric field disinfectant equipment is by material-storage jar 1, pump 2, vacuum degasser 3, dc source 4, the after-treatment devices 8 such as process chamber 5, high-voltage pulse electric generator 6, electric pulse process chamber 7, cooling that polarize are connected with finished product jar 9 and form in advance.Dc source 4 is common dc source, and dc source 4 and pre-polarization process chamber 5 have been connected to form pre-polarization treatment device; High-voltage pulse electric generator 6 and electric pulse process chamber 7 have constituted the electric pulse sterilizing unit.The concrete structure of polarization process chamber 5 comprises electrode 13 in inlet 10, cylindrical shape external electrode 11, outlet 12, the round bar shape, power supply wiring 14, electrode insulating film 15 and external electrode earth connection 16 compositions as shown in Figure 2 in advance.Electrode 13 arranged in co-axial alignment in cylindrical shape external electrode 11 and the round bar shape; Cylinder external electrode 11 is by ground wire 16 ground connection, and its inwall can not spray insulating barrier; Electrode 13 is connected with dc source 4 by power supply wiring 14 in the round bar shape, and electrode 13 surfaces evenly are coated with the thick polytetrafluoroethylene (PTFE) thin layer 15 of 0.5mm in the round bar shape.The electrode material of electrode 13 is copper in cylindrical shape external electrode 11 and the round bar shape.The external diameter of cylindrical shape external electrode 11 is 50mm, and internal diameter is 44mm; The external diameter of center pole 13 is 24mm, electrode distance 10mm.The length of pre-polarization process chamber 5 is 100mm, and input voltage is direct current 300V, and the material flow in the process chamber 5 that polarizes in advance is 50ml/s; The electric field strength of electric pulse process chamber 7 is 30kV/cm, pulse width 30 microseconds, pulse generation frequency 500Hz, square waveform.
Treating material is that initial bacterial content is 5 * 10
5The orange juice of CFU/ml, this material are gone up the space between the electrode 13 and cylinder external electrode 11 in (outlet 12) round bar shape of flowing through from down (inlet 10), enter after the processing that polarizes in advance again and carry out the high electric field pulse sterilization in the electric pulse process chamber 7.
The experiment correction data:
(1) prior art: after this orange juice was directly handled 1000 pulses through the high-pressure pulse electric of existing parameter condition, the viable count in the orange juice was 2.7 * 10
3CFU/ml;
(2) present embodiment 1: after carrying out 1000 burst process of high-pressure pulse electric again after this orange juice is handled through pre-polarization earlier, viable count is reduced to 1.2 * 10 in the orange juice
3CFU/ml, with the result of prior art relatively, bactericidal effect has improved, pre-polarization sterilization back orange juice viable count reduce to that simple impulse electric field handles 45%.
Embodiment 2
Present embodiment is substantially the same manner as Example 1, its difference is: the configuration of electrodes of the process chamber 5 that polarizes in advance is the parallel flat formula, as shown in Figure 3, described electrode is two planar electrodes 18,19 that be arranged in parallel, two plate electrodes 18,19 are fixedly installed in the insulation frame 17, electrode material is a copper, all scribbles the thick polytetrafluoroethylene (PTFE) of 0.5mm on the surface of two electrodes 18,19, and two electrodes 18,19 are connected with the two poles of the earth of dc source 4 respectively.Battery lead plate is of a size of 50mm * 200mm (wide * height), and electrode distance is 10mm.Under the processing parameter condition identical, can obtain similar treatment effect with embodiment 1.
Claims (9)
1, a kind of Prepolarized pulse electric field disinfectant method is characterized in that comprising the steps: before high-voltage pulse electric field sterilization, the processing that earlier material polarized in electrostatic field in advance, and described electrostatic field field intensity is 100～1000V/cm.
2, Prepolarized pulse electric field disinfectant method according to claim 1 is characterized in that: the pre-polarization processing time of described material was less than 3 seconds.
3, a kind of Prepolarized pulse electric field disinfectant equipment of realizing the described method of claim 1～2, comprise material-storage jar, pump, vacuum degasser, high-voltage pulse electric generator, electric pulse process chamber, it is characterized in that: comprise the pre-polarization treatment device that is connected to form by dc source and the pre-electrode that polarizes process chamber.
4, Prepolarized pulse electric field disinfectant equipment according to claim 3, it is characterized in that: the configuration of electrodes of described pre-polarization process chamber is a concentric cylinder type, be that described electrode comprises inside and outside cylinder electrode, the coaxial setting of described inside and outside cylinder electrode.
5, Prepolarized pulse electric field disinfectant equipment according to claim 3, it is characterized in that: the configuration of electrodes of described pre-polarization process chamber is the pole drum type brake, be that described electrode comprises electrode in cylindrical shape external electrode and the round bar shape, electrode and the coaxial setting of cylindrical shape external electrode in the round bar shape.
6, Prepolarized pulse electric field disinfectant equipment according to claim 3 is characterized in that: the configuration of electrodes of described pre-polarization process chamber is the parallel flat formula, and promptly described electrode is two planar electrodes that be arranged in parallel.
7, Prepolarized pulse electric field disinfectant equipment according to claim 6 is characterized in that: described planar electrode is arranged in the insulation frame.
8, Prepolarized pulse electric field disinfectant equipment according to claim 3 is characterized in that: with material electrodes in contact surface insulating barrier is set in the described pre-polarization process chamber.
9, Prepolarized pulse electric field disinfectant equipment according to claim 8 is characterized in that: described thickness of insulating layer is 0.3～1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200410077405 CN1285291C (en) | 2004-12-20 | 2004-12-20 | Prepolarized pulse electric field disinfectant method and its equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410077405 CN1285291C (en) | 2004-12-20 | 2004-12-20 | Prepolarized pulse electric field disinfectant method and its equipment |
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| CN1623448A true CN1623448A (en) | 2005-06-08 |
| CN1285291C CN1285291C (en) | 2006-11-22 |
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| CN 200410077405 Expired - Fee Related CN1285291C (en) | 2004-12-20 | 2004-12-20 | Prepolarized pulse electric field disinfectant method and its equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473990B (en) * | 2009-01-19 | 2011-06-15 | 杭州电子科技大学 | Line type electrode high-voltage pulse electric field sterilization device |
| CN101674736B (en) * | 2007-03-21 | 2013-11-06 | Opus工业股份有限公司 | Method and device for sterilising a liquid |
| CN101674737B (en) * | 2007-03-21 | 2014-02-19 | Opus工业股份有限公司 | Sterilisation of liquids in hermetically closed vessels |
| CN104056286A (en) * | 2014-07-14 | 2014-09-24 | 李衡 | High-voltage static sterilization equipment and high-voltage static sterilization process for traditional Chinese medicine decoction pieces |
| CN107183481A (en) * | 2017-06-15 | 2017-09-22 | 成都科衡环保技术有限公司 | A kind of cold bactericidal reaction device of high-pressure pulse electric, power circuit and control method |
| CN111513130A (en) * | 2020-05-06 | 2020-08-11 | 湖北省农业科学院农产品加工与核农技术研究所 | Method for sterilizing and refreshing fruits and vegetables by combining modified atmosphere packaging with electrostatic field |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2186780A1 (en) * | 2007-07-12 | 2010-05-19 | H2O Concepts International Inc. | Device and method for reduction of bacteria and viruses in water via a controlled electric field |
-
2004
- 2004-12-20 CN CN 200410077405 patent/CN1285291C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674736B (en) * | 2007-03-21 | 2013-11-06 | Opus工业股份有限公司 | Method and device for sterilising a liquid |
| CN101674737B (en) * | 2007-03-21 | 2014-02-19 | Opus工业股份有限公司 | Sterilisation of liquids in hermetically closed vessels |
| CN101473990B (en) * | 2009-01-19 | 2011-06-15 | 杭州电子科技大学 | Line type electrode high-voltage pulse electric field sterilization device |
| CN104056286A (en) * | 2014-07-14 | 2014-09-24 | 李衡 | High-voltage static sterilization equipment and high-voltage static sterilization process for traditional Chinese medicine decoction pieces |
| CN107183481A (en) * | 2017-06-15 | 2017-09-22 | 成都科衡环保技术有限公司 | A kind of cold bactericidal reaction device of high-pressure pulse electric, power circuit and control method |
| CN111513130A (en) * | 2020-05-06 | 2020-08-11 | 湖北省农业科学院农产品加工与核农技术研究所 | Method for sterilizing and refreshing fruits and vegetables by combining modified atmosphere packaging with electrostatic field |
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| CN1285291C (en) | 2006-11-22 |
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Assignee: Rousselot (Daan) Gelatine Co.,Ltd. Assignor: South China University of Technology Contract record no.: 2011440000996 Denomination of invention: Prepolarized pulse electric field disinfectant method and its equipment Granted publication date: 20061122 License type: Exclusive License Open date: 20050608 Record date: 20110926 |
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Granted publication date: 20061122 Termination date: 20201220 |