Method for the in-line processing of liquid or pasty or semi-liquid media such as grape harvests

Abstract

The invention relates to a method for the in-line processing of liquid or pasty or semi-liquid media or further, media which contain solid elements in a liquid base, in pipe for conveying the medium between two steps in a plant by direct injection of a cryogenic fluid into the pipe, characterised in that the method uses, for the injection into the pipe, an injection device (3) including a hollow cylindrical body in which a valve (17) urged by a spring (19) is inserted, said injection device including a through-channel (18) substantially parallel to said valve and supplied with a pressurised cryogenic fluid, wherein one end of the through-channel is connected to the cryogenic fluid supply system while the opposite end opens at the seat (13) of the valve.

Description

technical field [0001] The invention relates to the field of treatment of substances, which may be liquid or semi-liquid or pasty substances / mediums or alternatively substances consisting of solid components in a base liquid, such as cooling, inertization, carbonation or optionally acids / Alkaline chemical reactions, especially in the food industry, the treatment is carried out en ligne in pipelines. For example, the invention relates in particular to the cooling of harvested grapes (whole or crushed), carried out in the pipes connecting the harvest stage (step, étape) and the press, but it can also be used in a particularly advantageous manner For other substances requiring cooling, such as dairy substances, or optionally for waste water treatment. Background technique [0002] Now, let us investigate more details in the following example of chilled harvested grapes. [0003] Users attempt to cool whole or crushed grapes using a rapid, coordinated and non-mechanical meth...

AI Technical Summary

Problems solved by technology

[0009] - Document WO 2004 / 037966 describes the conversion of liquid CO 2 In-line injection connects the container receiving the harvested grapes to the pipeline of the press, but this document uses a simple nozzle for injection into the pipeline, which according to the tests carried out by the applicant makes it impossible to prevent the "water" in the material being treated. "shock phenomenon" (sudden overpressure / overpressure) (this phenomenon is desired to be prevented according to the invention)

Moreover, it should also be mentioned that such a simple orifice results in a very unfavorable cold fluid distribution in the stream of harvested grapes being transported

Moreover, it is also pointed out that it is difficult to lower the temperature by more than 5°C with such a simple nozzle at a product flow rate of 70 to 80 tons / h

[0010] -Another type of system described in document WO 2005 / 053440 may also be mentioned, which uses a batch processing system, although this system is very advantageous and performs very well, it is also more complex, bulky and more difficult to install on existing equipment

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