RU2448479C2 - Pear, apple and quince compote sterilisation method - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention is related to preserved food industry. The method for sterilisation of pear, apple and quince compote in No 13 tin can involves heating in air flow at a temperature of 140°C at a rate of 1.5-2 m/s for 24 minutes with subsequent maintenance for 15-18 minutes at a temperature 105°C. Cooling is performed for 6 minutes in a 25-28°C atmospheric air flow at a rate of 7-8 m/s with application of a water film on the can surface. In the process of heating and cooling the can is turned upside down with frequency of 0.2 s^-1, maintenance is performed in a static state of the cans.

EFFECT: invention allows to save thermal energy and water as well as enhances the ready product quality due to reduction of heating duration.

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Description

The proposed method for the invention relates to the canning industry, and in particular to methods of sterilizing compote from pears, apples and quinces in a can No. 13.

Sources that were searched by this method showed that the prototype of the proposed method is a method for sterilizing compotes [1], the essence of which is that the rolled cans are placed in a sterilization apparatus (autoclave) and subjected to heat treatment according to the regime:

where 15 is the duration of heating the water in the autoclave to 100 ° C, min; (25-30) - duration of own sterilization, min; 15 - cooling time, min; 118 - back pressure in the autoclave, kpa; 100 - sterilization temperature, ° C.

The disadvantages of this method are:

- the long duration of the heat treatment process, which affects the quality of the finished product;

- uneven heat treatment of different layers of the product in the bank (the temperature difference between the central and peripheral layers reaches 8-10 ° C and, accordingly, the magnitude of the sterilizing effects are not the same; the peripheral layers receive excessive heat exposure);

- high consumption of thermal energy and water.

The aim of the proposed method is to reduce the duration of the heat treatment process, save heat energy and water and improve the quality of the finished product.

This goal is achieved due to the fact that according to the proposed method, cans with compote, after seaming, are installed in a special carrier that provides mechanical tightness of the cans and are heated in a stream of air with a temperature of 140 ° C and a speed of 1.5-2 m / s for 24 min with simultaneous rotation of the can from “bottom to cover” with a frequency of 0.2 s ^-1 , followed by exposure for 15-18 minutes at a temperature of 105 ° C in a static state of the cans and cooling in a stream of atmospheric air with a temperature of 25-28 ° C and a speed of 7-8 m / s jars on surface water film for 6 minutes while the jar is rotated at a "bedplate cover on" rate of 0.2 s ^-1.

An example implementation of the method.

Cans with compote, after sealing the lid, are installed in a carrier that provides mechanical tightness (to prevent leakage during heating), and placed in a chamber where heated air circulates with a temperature of t _in = 140 ° C and a speed of 1.5-2 m / s, and for 24 minutes the contents of the cans are heated while the cans are rotated from the “bottom to the lid” with a frequency of 0.2 s ^-1 , then the carrier with the cans is transferred to a holding chamber with heated air at a temperature of 105 ° C for 15-18 minutes, where the cans aged in static condition followed by transfer to a chamber for cooling in a stream of atmospheric air with a temperature of 25-28 ° C and a speed of 7-8 m / s with applying a water film to the surface of the can for 6 minutes and rotating the cans from the “bottom to the lid” with a frequency of 0, 2 s ^-1

The salient features of the proposed method are: the compote is heated in a stream of air with a temperature of 140 ° C and a speed of 1.5-2 m / s for 24 minutes while the cans are rotated from bottom to cover with a frequency of 0.2 s ^-1 followed by holding in a chamber at a temperature of 105 ° C for 15-18 minutes in a static state with further cooling in a stream of atmospheric air with a temperature of 25-28 ° C and a speed of 7-8 m / s with the application of a water film on the surface of the can for 6 minutes and rotation of cans from “bottom to cover” with frequency 0.2 s ^-1

This mode ensures the industrial sterility of canned food, which is confirmed by the magnitude of the sterilizing effect, which corresponds to the normative value of 150-200 conventional. min

In addition, the proposed method in comparison with the prototype provides significant savings in thermal energy, completely eliminates the use of water in the process of thermal sterilization and provides improved quality of the finished product by reducing the duration of heating and rotation and ensuring uniformity of heat treatment.

Literature

1. A collection of technological instructions for the production of canned food. T.2. - M.: Food Industry, 1977.

Claims (1)

A method of sterilizing compote from pears, apples and quinces, including installing cans in a carrier, ensuring tightness and heating, aging and cooling processes, characterized in that the compote is heated in an air stream at a temperature of 140 ° C and a speed of 1.5-2 m / s within 24 min, while the jar is rotated from the bottom to the lid with a frequency of 0.2 s ^-1 , followed by exposure to 105 ° C in an air stream for 15-18 min, while the jar is in a static state, followed by cooling for 6 min in a stream of atmospheric air pace ture 25-28 ° C and a speed of 7-8 m / s with applying to the surface of the can, and rotation of the water film cans with bottoms on the lid at a frequency of 0.2 s ^-1.