| 摘要 |
The invention relates to a device for the distribution of powdery materials from a single pressurised transport container through a multiplicity of conveyor lines to a multiplicity of delivery points. The container is supplied with a compressed gas to fluidise the powdery materials, which are then distributed to the conveyor lines. The conveyor lines have outflow control valves to control the outflow rate of the materials in each line. An additional compressed gas, whose flow rate is controlled by a control valve, is fed into the lines. The control valves for the flow rate of the additional compressed gas is cascade-controlled in each line by means of a controller, which receives an output signal from a differential pressure sensor. The differential pressure sensor measures the differential pressure of an evacuation or feed nozzle at the end of the line. Since the outflow rate of the powdery materials is proportional to the differential pressure, it can be controlled as desired by controlling the flow rate of the additional compressed gas as a function of the differential pressure of the evacuation nozzle.
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