Apparatus and method for thermal treatment of food products in plastic packages

 

The invention relates to the apparatus and method of heat treatment of food in a plastic container. The specified container after filling with food tightly closed and the inside of the container, introducing two metal or plastic pipes to circulate filled liquid. These pipes are connected through a pump to the secondary circuit of the heat exchanger. Using heated water or steam in the primary circuit pour the liquid is heated simultaneously in the container, pump, pipes and heat exchanger. Using cold water in the primary circuit of the heat exchanger of the food product in the container is cooled. After pasteurization or sterilization tube is removed and the container tightly closed, preventing the possibility of infection. The invention allows the packaging of canned food in a modern plastic materials, for example, in the composition of the multi-layered heat resistant modifications foil. 3 S. and 3 C.p. f-crystals, 2 Il.

The technical field to which the invention relates.

The present invention relates to apparatus and method for thermal treatment of food products in plastic pack is Ala, namely containers in glass and tin cans. Attempts to use for packaging canned food modern plastic materials, for example, in the composition of the multi-layered heat resistant modifications foil. The advantage of these materials is the ease of their pattern, which creates the possibility of manufacturing products such large sizes. Traditional packaging materials, i.e. glass and cans, mechanical and financial reasons for such purposes are not suitable. In terms of sales the demand of large size and low price of canned food is dictated by the service industry, such as hospitals, schools, canteens and so on,

The problem is that for heating and subsequent cooling products such large traditional technologies are not suitable from the point of view of providing the required temperature in Central banks, because the container is usually filled food products and is heated by exposure to hot water or steam to the outer surface of the container.

From the article "New possibilities of filling in aseptic containers pack in a box", published by R. Decio, known OS is the product with increasing temperature up to the desired level, keeping the product at a high temperature for a specified time, cooling of the product as fast as possible to a temperature of 35Or less.

Since during the filling process the temperature of the food is low (35With or less), the container must be sterilized by exposure to radiation or chemicals. Other features aseptic technology include: the introduction of sterilized food products in aseptic environment, which represents a relatively complex WTCV process (high temperature short time). This process is used in aseptic technology, provides for maintaining food products at high temperature (approximately 140C), and therefore it is necessary to use complex heat exchangers and steam boiler.

When applying this method, the problem of handling bulk products is reliable solutions.

In patent documents US-A-4092111 and DE 4442709 A1 describes an apparatus for the heat treatment of the products contained in sealed containers. This apparatus comprises a heat exchanger, pump and connecting t is the tank liquid at the same time is a heating-cooling agent (in practice this is water) energy-carrying heating or cooling to the outer surface of the container subject to pasteurization. Therefore, one end of the pipe attached to the bottom of the vessel (autoclave) for collecting fluid, "incoming gravity" before moving it to the heat exchanger and back to the vessel for transferring liquid in the upper portion of the apparatus after passing through the heat exchanger".

In the patent document DE 4442709 A1 discusses how to minimize waste due to the contamination of the heating-cooling medium in the destruction of the container filled with food, during the heating process. Energy heating / cooling is passed through the heat exchanger and circulation of substances through the pump.

In the document JA-P-59210874 method of heat treatment products (heating and subsequent cooling) discussed in vague form, but in the description it is stated that "the opening part of the container tightly closed in observance amicrobic conditions. A practical solution to this problem is not described, but the term "amicrobic conditions" means the sterilization of the outer surface of the container, creating amicrobic space around the opening part of the container, and the use of the tool, observadas mechanically.

In addition to aseptic way, there are two methods of pasteurization.

1. The so-called method of "hot fill", which includes: filling the container with food at a relatively high temperature (approximately 85C), and possible microbial contamination of the container is eliminated by hot products. The disadvantage of this method is the impossibility of rapid cooling. In addition, for foods with a high pH value requires additional sterilization is already closed container.

2. Thermal processing of food, traditionally carried out by heating the pre-closed container (tin or glass jar). As a consequence, the size of the container is limited because of possible overheating of the food particles around the outer surface of the container, while the center may remain relatively cold.

The essence of the invention.

The problems with the existing prior art, can be resolved by using the apparatus and method according to the present invention. Heat treatment in this case are as follows. Plastic container after filling food Prodi, i.e. holes for pipes localized above the level of the fill fluid and the pipe ends are below this level. To seal the holes should be smaller than the diameter of the pipe. These pipes through the pump attached to the secondary circuit of the heat exchanger. Using hot water or hot steam in the primary circuit pour the liquid is heated, and simultaneously in the container, pipes and heat exchanger. Because the contour of the filled liquid is sealed, it is pasteurized at the same time in the container, pump, pipes and heat exchanger. Food products are cooled using cold water in the primary circuit of the heat exchanger. After pasteurization, the pipes are removed and the container, to exclude the possibility of any infection, immediately tightly closed below the hole.

According to the invention the apparatus for thermal treatment of food products in plastic bags comprises a heat exchanger for heating and subsequent cooling pour liquid pump in the secondary circuit of the heat exchanger, metal or plastic pipe that connects the heat exchanger, pump and at least one filled food container. A distinctive feature of the proposed oppepaeva fluid, moreover, this liquid is hermetically isolated in the container, pump, pipes and heat exchanger.

In a preferred embodiment, the apparatus comprises a sealed container or autoclave, which has at least one filled food container. Capacity or autoclave made with possibility of increase or decrease in pressure during respectively the heating process and cooling process.

The proposed method of pasteurization of food products in plastic container is realized by means of the above apparatus. According to this method is carried out circulation pour the liquid in at least one filled food container, and allows the circulation of said liquid is ensured introduced into the container with the trumpets, raise the temperature of pour liquid through a heated water or steam in the primary circuit of the heat exchanger reduces the temperature of the fill fluid due to the cold water in the primary circuit of the heat exchanger.

The proposed method of sterilizing food products in plastic container is realized by means of the aforementioned preferred alternative implementation of the apparatus. According to atomal the temperature of the fill fluid through the heated water or steam in the primary circuit of the heat exchanger, at the same time increasing the pressure in sealed containers to ensure temperature pour liquid above 100To reduce the temperature of the fill fluid due to the cold water in the primary circuit of the heat exchanger, simultaneously lowering the pressure in sealed containers.

In a preferred embodiment, the above methods upon completion of the process, respectively pasteurization or sterilization sealed container for receiving canned food in a sealed container.

List of figures.

More clearly the invention will be presented with a detailed description of the preferred embodiments, given only as examples, with reference to the accompanying drawings, of which:

Fig.1 is a schematic representation of the preferred option exercise apparatus according to the invention,

in Fig.2 is a schematic representation of another preferred embodiment of the invention.

Information confirming the possibility of carrying out the invention. Fig.1 illustrates the preferred implementation of the apparatus and method according to the invention. The problems with the existing level of the NTA implementation in which a plastic container 3 tightly closed after filling food and fill fluid and placed in a container 4. While the interior of the container 3 enter two pipes that allows circulation of filled liquid. The holes for pipes localized above the level of the fill fluid and the pipe ends are below this level. To seal the holes should be smaller than the diameter of the pipe. These pipes through the pump 2 is attached to the secondary circuit of the heat exchanger 1. Due to the heated water or steam in the primary circuit of the heat exchanger 1 pour the liquid is heated simultaneously in the container 3, the pipes and the heat exchanger 1. Because the contour of the filled liquid is sealed, it is pasteurized at the same time in the container 3, the pump 2, the pipes and the heat exchanger 1. Due to the cold water in the primary circuit of the heat exchanger foods are cooled. After pasteurization, the pipes are removed, and the container 3, to prevent the penetration of bacteria, immediately sealed. For sealing can be used additional material, such as foil. In the most simple embodiment, the container is conventionally divided into two parts, one of which are the re is La, and cut off the part with the products. The result is canned foods in a sealed package.

It is obvious that in the secondary circuit of the heat exchanger 1 can at the same time pasteurized several containers 3.

In Fig.2 shows another preferred embodiment of the invention, which are described technology can be used for canning foods with a low pH value at temperatures below 100C. Placing the container (s) 3, filled (filled) food in a hermetically sealed container (autoclave) 6, it is possible to increase the pressure during heating without bringing pour the liquid to the boil. It is also possible to carry out processing at temperatures above 100With, as well as to conserve, i.e., to sterilize food products with a high pH value (for example, peas and corn).

In the process according to the invention the pump 2, which provides the required amount of heat is controlled by the temperature in the container (containers) 3. Before the start of the process, to ensure a stable level of filled liquid in the container (containers), pipes in the secondary circuit need to vent.

After the OCC damage (package type package in a box").

Claims

1. Apparatus for the pasteurization of food products, comprising a heat exchanger, a pump in the secondary circuit of the heat exchanger and metal or plastic pipe that connects the heat exchanger, pump and at least one filled food container, characterized in that the said pipe is inserted inside the container to enable the circulation of filled liquid, which is hermetically isolated in the container, pump, pipes and heat exchanger.

2. The apparatus according to p. 1, characterized in that it comprises a sealed container or autoclave, which has at least one filled food container, made with capability of raising and lowering the pressure in the tank.

3. Method of pasteurization of food in a plastic container by means of the apparatus described in paragraph 1, characterized in that exercise circulation pour the liquid in at least one filled food container, and allows the circulation of said liquid is ensured introduced into the container with the trumpets, raise the temperature of pour liquid through a heated water or steam in pelvicore heat exchanger.

4. The method according to p. 3, characterized in that upon completion of the process of pasteurization sealed container for receiving canned food in a sealed container.

5. The method of sterilization of food in a plastic container by means of the apparatus described in paragraph 2, characterized in that exercise circulation pour the liquid in the filled food container, raise the temperature of pour liquid through a heated water or steam in the primary circuit of the heat exchanger, simultaneously increasing the pressure in sealed containers to ensure temperature pour liquid above 100To reduce the temperature of the fill fluid due to the cold water in the primary circuit of the heat exchanger, simultaneously lowering the pressure in sealed containers.

6. The method according to p. 5, characterized in that upon completion of the sterilization process sealed container for receiving canned food in a sealed container.

 

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