CN103637353A - High-voltage electric field sterilizing device - Google Patents

Abstract

The invention relates to a high-voltage electric field sterilization equipment used in food processing, which includes a pipeline, a treatment chamber and a high-voltage power supply, the treatment chamber is arranged in the middle of the pipeline, wherein the treatment chamber is composed of a reactor, a pressure regulator and a heat exchange The reactor is composed of two electrodes connected to the high-voltage power supply and an insulating baffle. The insulating baffle is sealed and connected in the pipeline and is located between the two electrodes. The middle of the insulating baffle is provided with the The pipeline forms a small hole in the treatment chamber through which the fluid to be treated flows continuously. The invention has simple technology and low cost, can kill pathogenic bacteria and prolong the shelf life of the food while keeping the taste, color and nutritional components of the food unchanged, so as to keep the inherent quality of the food itself to the greatest extent.

Description

A high-voltage electric field sterilization equipment

technical field

The invention relates to a sterilizing device in food processing, in particular to a sterilizing device using a high-voltage electric field.

Background technique

In the process of food processing, the use of sterilization equipment to sterilize food is one of the most important links. It is the core technology of the food industry. Its purpose is to kill microorganisms, inactivate enzymes, ensure food safety and make food have sufficient shelf life. . At present, the thermal sterilization equipment commonly used in the food industry sterilizes food. Although thermal sterilization can ensure the safety of food in terms of microorganisms, during heat treatment, the heat energy penetrates the food to reach the core of the food and then slowly cools it. This process will vary in degree. The nutritional content and natural characteristics of food are severely destroyed, such as flavor changes, texture softening, color changes and loss of vitamins. In addition to the above changes, it is also easy to cause protein denaturation, amino acid damage, and damage to other nutrients that are sensitive to heat.

In order to maintain the inherent quality of the food itself to the greatest extent, a new type of food sterilization technology - cold sterilization technology came into being. Cold sterilization refers to a safe and efficient sterilization method in which the temperature of food does not rise or rises very low during the sterilization process, such as ultra-high pressure (High Hydrostatic Pressure, HHP) sterilization, high-voltage pulsed electric field (Pulsed Electric Fields, PEF) sterilization, pulse Strong light sterilization, ultraviolet sterilization, radiation sterilization, etc. Cold sterilization can not only ensure the safety of food in terms of microorganisms, but also better maintain the inherent nutritional components, texture, color and freshness of food and the physiological activity of food functional components. In recent years, with the change of people's concept of health and nutrition, authentic food has gradually become fashionable, so cold sterilization technology has been highly valued by the food industry.

Electric field sterilization technology is one of the hot spots in the research and development of cold sterilization technology in the world in recent years. In particular, high-voltage pulsed electric field sterilization PEF technology has been fully studied, but its application in the food industry is restricted due to the complexity of the sterilization system and high cost.

Contents of the invention

The purpose of the present invention is to provide a high-voltage electric field sterilization equipment with simple technology and low cost, which can kill pathogenic bacteria and prolong the shelf life of food while maintaining the inherent quality of food to the greatest extent.

To achieve the above object, the present invention provides a high-voltage electric field sterilization equipment, including a pipeline, a treatment chamber and a high-voltage power supply, the treatment chamber is arranged in the middle of the pipeline, wherein the treatment chamber is composed of a reactor, a pressure regulator and a heat exchanger The reactor is composed of two electrodes connected to the high-voltage power supply and an insulating baffle. The insulating baffle is sealed and connected in the pipeline and is located between the two electrodes. In the middle of the insulating baffle, there is a The path forms a small hole in the treatment chamber, and the fluid to be treated flows continuously through the small hole.

The above-mentioned high-voltage electric field sterilization equipment, wherein the two electrodes are sealed and connected with the pipeline to form a hollow tube; the thickness of the insulating baffle is 0.5-10mm; the diameter of the small hole in the middle of the insulating baffle is 0.5-10mm ; The reactors are used in series or in parallel in the pipeline.

The high-voltage electric field sterilization equipment of the present invention uses the principle of high-voltage electric field sterilization, and its treatment chamber design and electrode configuration make high-voltage electricity concentrated in a certain area and form a high-intensity electric field in this area, thereby achieving the purpose of sterilization. The principle of high-voltage electric field sterilization technology is the same as that of high-voltage pulse electric field sterilization technology, but the implementation method is simpler and more economical. High-voltage electric field sterilization equipment is mainly used for fruit juice, tea beverage, bottled water, beer, milk and milk beverage, liquid eggs, fermented products, condiments, fermented liquid, oral liquid, potion, biological cleaning liquid and other heat-sensitive liquid products. Sterilization can kill pathogenic bacteria and prolong the shelf life of food while keeping the taste, color and nutritional content of the food itself unchanged to the greatest extent.

Description of drawings

Fig. 1 is the schematic diagram of high voltage electric field sterilization equipment of the present invention;

Figure 2 is a schematic diagram of the reactor of the present invention.

In the figure: 1. Pipeline 2. Processing chamber 3. Electrode 4. Insulation baffle 5. Small hole 6. Electrode

Detailed ways

Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention.

As shown in Figure 1, the present invention provides a kind of high-voltage electric field sterilization equipment, comprises pipeline 1, processing chamber 2 and high-voltage power supply, and processing chamber 2 is arranged in the middle of pipeline, and wherein said processing chamber 2 is regulated by reactor, pressure It consists of a pressure regulator and a heat exchanger, wherein the pressure regulator and the heat exchanger all belong to the prior art.

As shown in Figure 2, the reactor is composed of electrodes 3, 6 and insulating baffles 4 respectively connected to the high-voltage power supply. The insulating baffles 4 are hermetically connected to the pipeline 1 and are located between the two electrodes. A small hole 5 forming a processing chamber with the pipeline is provided in the middle of the baffle plate 4, and the fluid to be treated flows through the small hole 5 continuously. The two electrodes are sealingly connected with the pipeline 1 to form a hollow tube. The thickness of the insulating baffle 4 is 0.5-10mm, and the diameter of the small hole 5 in the middle of the insulating baffle is 0.5-10mm; the reactors are used in series or in parallel in the pipeline.

Its production process is: pumping material - high voltage electric field sterilization - energy recovery - product filling.

High-voltage electric field sterilization is a method of sterilization using a strong electric field generated by high voltage. The basic process is to treat the food between the two electrodes with instantaneous high voltage, so that the permeability of the cell membrane is increased, the strength of the membrane is weakened, and finally the membrane is ruptured, the material inside the membrane flows out, the material outside the membrane penetrates deep, and the cell body dies. The electromagnetic field produces ionization, which blocks the normal biochemical reaction and metabolism of the cell membrane, and changes the substances in the bacteria.

Studies have shown that the high-voltage electric field sterilization system and device have a 5-log reduction of E. coli 0157 in orange juice and a 7-log reduction of lactic acid bacteria under certain process conditions; a 4-log reduction of E. coli, Salmonella and Listeria in milk. 5log reduction.

This specification, while the invention has been described with reference to typical embodiments, it is understood that the words which have been used are words of description and illustration, rather than of limitation. Since the present invention can be embodied in various forms without departing from the spirit or essence of the application, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope of the appended claims. , all changes and modifications falling within the scope of the claims or their equivalents shall be covered by the appended claims.

Claims (6)

1. A high-voltage electric field sterilization equipment, comprising pipeline (1), treatment chamber (2) and high-voltage power supply, treatment chamber (2) is arranged in the middle of pipeline, it is characterized in that: described treatment chamber (2) is made of reactor , a pressure regulator and a heat exchanger. The reactor is composed of two electrodes (3, 6) connected to the high-voltage power supply and an insulating baffle (4). The insulating baffle (4) is sealed and connected to the pipeline (1) inside and between the two electrodes (3, 6), the middle of the insulating baffle (4) is provided with a small hole (5) forming a processing chamber with the pipeline, and the treated fluid flows through the small hole ( 5). 2. The high-voltage electric field sterilization device according to claim 1, characterized in that the two electrodes (3, 6) are sealed and connected with the pipeline (1) to form a hollow tube. 3. The high-voltage electric field sterilization equipment according to claim 1, characterized in that the thickness of the insulating baffle (4) is 0.5-10mm. 4. The high-voltage electric field sterilization device according to claim 1, characterized in that the diameter of the small hole (5) in the middle of the insulating baffle is 0.5-10mm. 5. The high-voltage electric field sterilization equipment according to claim 1, 2, 3 or 4, characterized in that the reactors are used in series in the pipeline. 6. The high-voltage electric field sterilization equipment according to claim 1, 2, 3 or 4, characterized in that the reactors are used in parallel in the pipeline.

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