Patent ID: 9162197
Filing Date: 2015-10-20
Classification: B01F,B01J

Abstract:
1. Mixing and metering device for mixing and metering liquid chemicals comprising: a circulation pump having a suction port and a pressure port, a tube coil, the content volume of which is dimensioned such that the chemicals metered into the device have a residence time sufficient for a chemical reaction of the chemicals; a choke tube which guides the circulation stream exiting from the tube coil, with formation of a choke point, from an outlet of the tube coil to a metering conduit which is arranged between the choke tube and the suction port of the circulation pump, at least two metering valves and a falling tube which is connected to the choke tube and has a vacuum flange for connection of the mixing and metering device to a vacuum device, and wherein the tube coil is arranged standing up vertically and has an inlet at the bottom and an outlet at the top wherein the choke tube guides a circulation stream downwards from the outlet of the tube coil downwards to the metering conduit which is horizontally arranged between the choke tube and the suction port of the circulation pump, and wherein the falling tube is connected to an end of the choke tube arranged above the level of the tube coil, and, at a lower end, comprises the vacuum flange for connection of the mixing and metering device to the vacuum device.