UA71759A - A method for the treatment of liquid products in package for increase of time of storage thereof and a mechanism for realizing the same - Google Patents

Abstract

A method for the treatment of liquid products in package for increasing the time of storage thereof consists in cavitation treatment of liquid. The package with liquid product is radiated with acoustic field having an intensity level more than 140 dB and at frequency equal to the resonance frequency of package walls, maintaining the air pressure in chamber where package is disposed, in the range of 0.05-0.1 MPa during the time depending on package volume.

Description

Description of the invention

The invention relates to the food industry and can be used in the processing of dairy products, 2 juices and other drinks in order to extend their storage time.

The most common method of extending the shelf life of liquid products in a container is heat treatment (Patent of Ukraine Mo35432 Mkl. A2ZI Z/d4, 2001. "Method of heat treatment of products in a glass container and device for its implementation). The main disadvantages of this method are the need to accurately withstand the temperature 0 mode and pressure in the chamber during the treatment process, high heat consumption and long duration of the treatment process Devices for heat treatment (autoclaves, heat baths) have the same disadvantages as the method of heat treatment.

The closest in terms of technical essence is the method of processing liquid products in the mode of liquid cavitation, which is generated by ultrasonic vibrations under excess liquid pressure (Author's certificate of the USSR

Mo288736 Mkl. 512Н7/16, 1973 "Method of sterilization of liquids"). In this method, ultrasonic vibrations 75 are generated directly in the liquid and due to the excess pressure of the liquid, the intensity of transmission of ultrasonic energy into the liquid increases.

Disadvantages of the method are the impossibility of ultrasonic treatment of products sealed in the container, the local effect of the ultrasonic field and, due to this, low processing productivity.

The closest in technical terms is the device for processing liquid media, described in the patent of Ukraine

Mo55709 Mkl. VOTE/ov, 2003 "Method of hydrodynamic treatment of heterogeneous liquid media and hydrodynamic disperser - mixer for its implementation". Here, the disperser-mixer creates hydrodynamic oscillations of the liquid medium in the local zone, which causes its cavitation treatment.

The main disadvantage of the device is the impossibility of cavitation processing of products clogged in containers.

The purpose of the method is to intensify the process of processing liquid products in a container to increase their storage time by increasing the productivity of the processing process, due to the volumetric effect of the acoustic field on the liquid and on the walls of the container. "

The goal is achieved by the fact that in the method of processing liquid products in the container, which includes cavitation treatment of the liquid, according to the invention, the container with the liquid product is irradiated with an acoustic field with an intensity level of more than 140dB and with a frequency equal to or close to the resonance frequency of the walls of the container, maintaining the pressure air in the storage chamber, where the container is placed, in the range of 0.05-0.1MPa over a period of time that depends on the volume of the container.

The lower limit of the sound intensity is chosen for the reasons that according to |1| at a lower intensity of the acoustic field, the sound practically does not affect the technological processes. Cha

Choosing a frequency of oscillations of the acoustic field equal to or close to the resonance frequency of the walls of the container under excess air pressure in the chamber ensures the most effective transfer of sound energy to the liquid (77 walls of the container. cha

The time of irradiation of the container with the product depends on the volume of the container, its walls and is chosen experimentally.

During the irradiation of the container, part of the sound energy is spent on the excitation of vibrations of the walls of the container, and the other part of this energy penetrates into the container and directly interacts with the liquid product, which pasteurizes and homogenizes the liquid. Oscillations of the walls of the container generate the process of cavitation of the liquid that adheres to the walls, intensifying the process of pasteurization. -о с The goal is achieved by the fact that in the device for processing liquid products in a container, which has a hermetic chamber, connected by a pipeline to a compressor and a cart with a container filled with liquid with a product, according to the invention, is additionally installed in the hermetic chamber a sound generator connected to a power supply unit and a sound frequency control unit, wherein the sound frequency control unit is tuned to a frequency

At or close to the resonant frequency of oscillations of the walls of the container with the product. This design of the device allows -I to implement the proposed method of processing liquid products in containers.

Figure 1 shows a method of processing liquid products in a container and a device for its implementation. - Chamber 1 and door 2 are covered with sound-insulating material 3. A sound generator is installed inside chamber 1 - 4. Compressor 5 with pipeline 6 and valve 7 are intended for supplying compressed air to chamber 1. Pipeline 8 with valve 9 are intended for releasing compressed air from the chamber 1 after processing the products in the container 10, which together with the boxes is installed on the cart 11. On the pipeline 6 in front of the faucet 7, a pressure gauge 12 is installed for

Control of the pressure value in the chamber 1. The sound generator 4 is connected to the power supply unit 13 and the sound frequency control unit 14.

The processing of liquid products in the container takes place due to the simultaneous action on the liquid and the container of a powerful acoustic field and forced vibrations of the walls of the container.

The increased pressure in the chamber 1, which is provided by the supply of compressed air from the compressor 5, intensifies

P" transmission of sound energy from the generator 4 to the walls of the container 10.

The device works as follows: on the cart 11, boxes with a container 10, in which the processed liquid is located, are installed.

The cart 11 with the container 10 is placed inside the chamber 1. The chamber 1 is tightly closed with the door 2. The air pressure in the chamber 1 is raised to 0.05-0.1 MPa with the compressor 5 60. At the same time, tap 7 is open, and tap 9 is closed. The pressure in the chamber is checked with a manometer 12. Close the tap 7. Turn on the sound generator 4. After processing the liquid products contained in the container 10, turn off the drive of the sound generator 4. With the tap 9, compressed air is released from the chamber 1 to the atmospheric pressure. After that, door 2 is opened, cart 11 with finished products is rolled out, and a cart with unprocessed products is installed instead. The processing cycle in 5 is repeated.

An example of a specific implementation of the method.

Before the irradiation of the M-Zl can with apple juice, the microbiological parameters of the juice and the resonance (natural) frequency of oscillations of the walls of the glass jar filled with juice were determined. It was also -1220 GHz. The generator sound frequency control unit was set to the same frequency.

After irradiation with an acoustic field with an intensity of 1bOdB, cans with juice in the chamber during Zhv, repeated microbiological analysis of the juice. A decrease in microbiological contamination was observed.

References 1. G.A. Kardashev "Physical methods of intensification of processes of chemical technology", Moscow: Chemistry 1990, p. 205. 76 KO 14

AND

2 4 - 12 with 1 t t i, ! -

New year spe le t NI I t Y Ben sia yan i DeDNSYA

GI N

And Z

I and E Shchi same. WITH

And and! Sha -- 012 I'm at 7! and "nSh" Fig. 1 (o)

Zo yu y

Claims (1)

The formula of the invention "- | | | | | And | And shk and - 1. The method of processing liquid products in a container to increase their storage time, which includes cavitation processing of liquid, which differs in that, in order to intensify the processing process, the container with the liquid product is irradiated with an acoustic field with an intensity level of more than 140 dB and with a frequency equal to or close to the resonance frequency of the container walls, maintaining the air pressure in the chamber where the container is located within 0.05-0.1 MPa for a time that depends on the volume of the container. шщ с 2. A device for processing liquid products in a container, which has a hermetic chamber connected by a pipeline to a compressor and a cart with a container filled with a liquid product is installed in it, which differs in that from h . . "и Кк . К-4 К-4 и? in order to intensify the processing process, a sound generator is additionally installed in the hermetic chamber, connected to the power supply unit and the sound frequency control unit, and the sound frequency control unit is tuned to a frequency equal to or close to of the resonant frequency of oscillations of the walls of the container with the product. -I Z. The device according to claim 2, which is characterized by the fact that it is additionally equipped with a sealed door, and the walls of the chamber and the door are covered with sound-insulating material, for example, concrete. - -I Official Bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated circuits", 2004, M 12, 15.12.2004. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. 3e) 60 b5