Abstract: A pressurized closed flow cleaning system for cleaning the interior surface of industrial processing equipment. The system includes a pressure vessel containing an aqueous cleaning solution including the combination of enzymes and a surfactant. A supply conduit connects the pressure vessel with equipment to be cleaned and serves to supply the cleaning solution to the equipment, while a return conduit connects the equipment to the pressure vessel and acts to return the cleaning solution to the pressure vessel, thus providing a closed flow system. The solution is circulated through the closed flow system by a pump located in the supply conduit and the aqueous solution is heated to a temperature, preferably in the range of about 220.degree. F. to 260.degree. F., by a heat exchanger which is located downstream of the pump. Flow of the heated cleaning solution through the equipment to be cleaned will remove oil and solid contaminants.

Abstract: A pressurized closed flow cleaning system for cleaning the interior surface of industrial processing equipment. A pressure vessel contains an aqueous cleaning solution including the combination of enzymes and a surfactant. A supply conduit connects the pressure vessel with equipment to be cleaned and serves to supply the cleaning solution to the equipment, while a return conduit connects the equipment to the pressure vessel and acts to return the cleaning solution to the pressure vessel, thus providing a closed flow system. The solution is circulated through the closed flow system by a pump located in the supply conduit and the aqueous solution is heated to a temperature, preferably in the range of about 220.degree. F., to 260.degree. F., by a heat exchanger which is located downstream of the pump. Flow of the heated cleaning solution through the equipment to be cleaned will remove oil and solid contaminants.