| 摘要 |
Installation for distributing granular or pulverulent substance by pneumatic transportation, comprising at least one dispatch silo (3) for the temporary storage of said granular or pulverulent material, the dispatch silo being designed to be alternately pressurized in order to empty the dispatch silo and depressurized to allow it to be filled, and a device for depressurizing said dispatch silo. The depressurizing device comprises a depressurizing line (12) connected to said dispatch silo, a bag filter (11), having a maximum operating throughput, connected to the depressurizing line, and flow regulating means (15) for regulating the rate of flow in said depressurizing line, through the bag filter. The bag filter (11) is designed to work under pressure, and the flow regulating means (15) are situated on the depressurizing line (12) downstream of the bag filter (11) and designed to ensure a flow rate at most equal to the maximum flow rate of the bag filter. Application notably to an installation for injecting coal into a blast furnace. |
