Process for injection by pneumatic means metered amounts of pulverulent materials into a vessel maintained at variable pressure

摘要

The process consists in making up, in a single metering device, a pneumatic mixture comprising a relatively high content of pulverulent substances in propellent gas, in propelling this mixture through a common primary conduit as far as a dispensing head in which the mixture is divided up into secondary streams which are directed respectively to each of the injection points through secondary conduits and in controlling the flow rate of the pneumatic stream in each of the secondary conduits. IMAGE