Method for balancing the gas pressure in a mass flow funnel and mass flow funnel

摘要

The invention relates to a method for balancing the gas pressure in a mass flow funnel (1) for discharging a fine-grained, fluidizable bulk material from a silo and a corresponding mass flow funnel (1), wherein the mass flow funnel (1) at least one pressure relief installation (3) open at the bottom or at least an inner funnel (14) which is supported by at least one vertical, upwardly closed and downwardly open, double-walled channel (15) against the wall of the mass flow funnel (1). According to the invention, a reduction of the pressure difference between the gas pressure within the bulk material and the gas pressure in the external environment or in the upper space of the silo by means of at least one pressure equalization line (5), wherein the pressure equalization line (5) is arranged such that it in the interior of the pressure relief installation (3) or in a channel (15) and that its other end leads into the environment or in the Silooberraum, and an injection of compressed gas or compressed air into the interior of the mass flow funnel (1). As a result, a faster and even pressure equalization between the gas pressure in the bulk material and the ambient pressure is effected, whereby fluidization and shooting of the bulk material can be prevented.