A plant for soy protein isolate production is being claimed wherein water consumption in the production process is significantly reduced (by a factor of 2.5) and liquid waste is nonexistent, which allows, moreover, to cut protein losses at the main process stages. To achieve the above result, the plant for soy protein isolate production comprising a raw material feeding unit； a raw material grinding unit； a raw material soaking tank； raw material, water, alkali and process liquids input nozzles and product output nozzles； devices for raw material extraction； decanters for separating the extract and fiber； an acidic protein precipitation tank； a decanter for protein separation； a protein washing tank； a decanter for washed protein separation； a device for protein drying； and a device for finished product packing, all connected with appropriate piping, is additionally equipped with a gravitational turbulence mixer positioned before the raw material soaking tank, a swirl mixer in the form of a spiral funnel installed in the pipeline before the acidic protein precipitation tank, and an evaporation system and a condensate tank, wherein the condensate drainage piping is connected to the raw material grinding unit, the raw material soaking unit, the device for the second raw material extraction and the protein washing tank, and the piping for process liquid drainage from the fiber separation decanter and washed protein separation decanter is connected to the gravitational turbulence mixer.L'invention concerne une installation pour la production d'isolats de protéines de soja, la consommation en eau dans le procédé de production étant significativement diminuée (par un facteur de 2,5) et les déchets liquides étant inexistants, ce qui permet, de plus, de réduire les pertes de protéines aux étapes principales du processus. Pour obtenir le résultat ci-dessus, l'installation pour la production d'isolats de protéines de soja comprend une unité d'alimentation en matière première
