Sterilizing method and device for jam and fruit juice which are heated directly by steam and cooled by flash evaporation

A steam and flash evaporation technology, applied in the field of food processing, can solve the problems of poor product taste and uncontrollable heating time, achieve good sensory characteristics and quality characteristics, ensure food hygiene and safety, and improve the effect of output.

Active Publication Date: 2011-11-09
孔凡东
7 Cites 6 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of uncontrollable heating time and poor product taste in the jam and fruit juice sterilization process in the prior art, the present inv...
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Abstract

The invention discloses a sterilizing method for jam and fruit juice which are heated directly by steam and cooled by flash evaporation, which comprises the following steps of: 1) mixing jam or fruit juice raw materials and the steam, and heating quickly to the sterilizing temperature to obtain high-temperature materials; 2) keeping the temperature and sterilizing the materials obtained in the step 1); and 3) cooling the materials obtained in the step 2) quickly by a flash evaporation process. The invention also aims to provide a sterilizing device for the jam and the fruit juice, which comprises a steam injection heater, a maintaining tank and flash evaporation equipment which are connected sequentially, wherein the flash evaporation equipment comprises a flash evaporation cooler connected with the maintaining tank and a vacuum pump connected with the flash evaporation cooler. By the sterilizing method and the sterilizing device for the jam and the fruit juice which are heated directly by the steam and cooled by the flash evaporation, the pasteurization of the jam and the fruit juice can be realized, the concentration and viscosity of products can be improved, the color and luster of the products can be protected, so that the high-quality jam and fruit juice products are obtained, and the products can be widely used.

Application Domain

Technology Topic

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  • Sterilizing method and device for jam and fruit juice which are heated directly by steam and cooled by flash evaporation
  • Sterilizing method and device for jam and fruit juice which are heated directly by steam and cooled by flash evaporation
  • Sterilizing method and device for jam and fruit juice which are heated directly by steam and cooled by flash evaporation

Examples

  • Experimental program(1)

Example Embodiment

[0038] The present invention is further described below by means of examples, and therefore the present invention is not limited to the scope of the described examples.
[0039] like figure 1 As shown, a jam and fruit juice sterilization device for direct steam heating and flash cooling, which includes a steam injection heater 1, a holding tank 2, a flash cooler 3 and a steam jet vacuum pump 4 connected in sequence, and the holding tank 2 is on the A liquid level control device is provided, which is used to adjust the liquid level of the material in the holding tank 2 to control the material holding time.
[0040] A method for sterilizing tomato paste with direct steam heating and flash cooling, which comprises the following steps:
[0041] Step 1), the tomato paste raw material is sent to the steam injection heater 1 from the a port, the steam is sent to the steam injection heater 1 from the b port, the tomato paste raw material and the steam are directly mixed in the steam injection heater 1, and passed through the steam injection heater 1. Mix two different temperature media to increase the temperature of the tomato paste raw material, the tomato paste raw material is rapidly heated to the sterilization temperature of 90~110 ℃ within 1 second, and the high temperature material mixed with tomato paste and steam is obtained;
[0042] In step 2), the material obtained in step 1) is transported to the holding tank 2 for thermal insulation and sterilization, and the holding time is controlled by controlling the liquid level in the holding tank 2, and the holding time is 1 to 8 minutes.
[0043] Step 3), transport the material obtained in step 2) to the flash cooler 3, inject steam as a vacuum power source into the steam jet vacuum pump 4 from port c, and the steam jet vacuum pump 4 starts to vacuum the flash cooler 3. , the vacuum is maintained in the flash cooler 3, and then the tomato paste in the flash cooler 3 is separated from the steam mixed in the tomato paste. The steam is taken away and discharged by the steam jet vacuum pump 4 during the vacuuming process. The steam is rapidly cooled to 30~40°C at the same time of separation. By controlling the vacuum degree of the flash cooler 3, the evaporation temperature of the steam can be controlled, and the purpose of cooling is achieved by evaporating water. .
[0044] In step 4), the materials in the flash cooler 3 treated in step 3) are sent out from the d port and then aseptically packaged to obtain a pasteurized tomato paste product.
[0045] The jam, fruit juice sterilization method and sterilization device of the invention with direct steam heating and flash cooling are applicable to a wide range of products, and are also suitable for jam products such as apricot jam, peach jam, apple jam, pear jam, or apple juice, orange juice, citrus Juice and other fruit juice products.
[0046] figure 2In order to compare the heating conditions of the materials of the jam and fruit juice sterilizers using the steam direct heating and flash cooling of the present invention and the heating conditions of the materials using the traditional set of indirect heat exchange sterilizers (plate type, tube type), curve 1 is the jam of the present invention, The heating curve of the material of the juice sterilization device, curve 2 is the material curve of the indirect heat exchange sterilizer.
[0047] In curve 1, point A to point B is the heating curve of the material rapidly heated to the sterilization temperature, point B to point C is the heating curve of the material when the material is kept warm, and point C to point D is the heating curve of the material when the material is flashed and cooled; curve 2 The heating curve from point A' to point B' is the heating curve of the material when it is heated to the sterilization temperature, the point B' to point C' is the heating curve when the material is kept warm, and the point C' to point D' is the heating curve when the material is cooled.
[0048] from figure 2 It can be seen that the sterilization and heating time of the jam juice and sterilization device using the steam direct heating and flash cooling of the present invention is much shorter than that of the traditional casing indirect heat exchange sterilizer, which is more beneficial for protecting the taste, color and flavor of the product.
[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.
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Description & Claims & Application Information

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