Coupling field-based structurally-optimized common-field treatment chamber for high-voltage pulsed electric field sterilizing system

Abstract

The invention discloses a coupling field-based structurally-optimized common-field treatment chamber for a high-voltage pulsed electric field sterilizing system. The common-field treatment chamber consists of two metal hollow tubular electrodes and an insulator isolating tube. A coupling field-based structural optimization design is adopted, so that a peak electric field existing close to an electric field is eliminated, the problem of 'discharge' caused by an over-high local electric field is solved, the uniformity of electric field distribution in the treatment chamber is ensured simultaneously, high electric field strength is concentrated in a main region through which materials pass, the flowing characteristics of materials in the treatment chamber is improved, the temperature distribution situation in the treatment chamber is well improved, the temperature variation of the treatment chamber can be monitored in real time, the acquisition and analysis of temperature data in the sterilizing process are facilitated, and temperature abnormity occurring in the sterilizing process is alarmed. The common-field treatment chamber has the advantages of safety, high efficiency, economical efficiency and the like, and the application of a high-voltage pulsed electric field sterilizing technology from a laboratory to pilot scale and commercialization can be facilitated.

Description

technical field [0001] The invention relates to a common-field treatment chamber of a high-voltage pulse electric field sterilization system based on a coupling field, in particular to a common-field treatment chamber of a high-voltage pulse electric field sterilization system based on a coupling field structure optimization. Background technique [0002] With the improvement of living standards, people's requirements for food quality are increasing day by day. In order to maintain the minimum loss of food sensory and nutritional value, non-thermal sterilization technology has been widely used in food processing. High-voltage pulsed electric field (PEF) sterilization technology is one of the most promising non-thermal sterilization technologies for industrial development. one. High-voltage pulse electric field sterilization technology has good sterilization effect, generally can reduce 6 logarithmic periods, short sterilization time, low sterilization temperature, basically...

AI Technical Summary

Problems solved by technology

There are several main problems in its design: 1. The electric field near the electrode rises sharply, resulting in a peak electric field, resulting in uneven distribution of the electric field; too high a local electric field may cause "discharge" problems; 2. The flow rate is fast in the middle, slow at the boundary, and the uneven flow rate causes Part of the material is over-treated, and some of the material is not completely processed; 3. The temperature rise in the treatment room also varies greatly, and the temperature rise of the boundary layer is much higher than that of the middle layer

During sterilization, the processing chamber is in a process of instantaneous high-frequency pulse application, the temperature sensor installed on the inner wall of the electrode will be affected by a strong electric field, the temperature sensor will fail or be damaged, and the temperature sensor installed on the inner wall of the electrode and Hall The sensor will also affect the uniformity of the electric field distribution to a certain extent

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