Filtering out particles from stream of material in pneumatic conveyor - using sensor detecting speed and mass flow of metal particles and activating downstream filter for controlled time interval

摘要

In a procedure for filtering out metal particles from a stream (1) of material in the tube (2) of a pneumatic conveyor, a sensor (3) is used past which the material flows and which activates the filter (4) downstream of it. For a certain time interval, the stream is then linked with a container (5) for the metal. The sensor generates a signal proportional to the speed of the particles and ensures that the time interval during which the container is open to the stream is reduced as the speed increases. Another signal is generated by the sensor according to the mass of particles, and the time interval is also varied according to this signal. ADVANTAGE - Highly efficient filtering process.