L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Air Liquide France Industrie

Olivier Pouchain

Alain Cloarec

Etienne Charve

Jo Algoet

Alban Poirier

Pierre Kowalewski

Herve Flamant

Jacques Fouche

Didier Pathier

Gilles Gaubert

Jean-Pierre Bernard

Christian Reymond

Hervé Flamant

Daniel Fontana

A plant for grinding a product, which includes a grinder in which the product is ground, which plant also includes a hopper for supplying the grinder with product to be ground, configured to be supplied with product to be ground; a means for bringing a cryogenic fluid into the hopper; and a means for discharging product from the hopper into the grinder. Wherein the hopper is provided in a lower part with a hollow screw provided with turns allowing the product to be discharged out of the hopper, into the grinder; and the means for bringing a cryogenic fluid into the hopper comprise an injection lance which is positioned inside the turns of the hollow screw, extending in a direction substantially parallel to the axis of the screw.

Method and installation for cryogenic crushing of products

The injection device according to the invention, intended to be attached to the wall of the bottom of a container containing a product to be cooled in bulk, includes a hollow cylindrical body in which a valve forced by a spring is inserted, a throughchannel appreciably parallel to said valve intended to be fed by pressurized cryogenic fluid, one end of said through-channel being connected to the cryogenic fluid feed system and the opposite end opening into the seat of the valve.

Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system

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Reze, France

Olivier Pouchain