Patent ID: 7048475

Claim:
A method for conveying a pulverulent material enabling division of the pulverulent material from a single storage facility among multiple outlets with a controlled flow rate in each of the outlets, comprising the steps of: linking the storage facility and the outlets with at least one aero-pipe, with a hyperdense fluidized meter connected between the aero-pipe and each of the outlets, the aero-pipe being disposed either horizontally or slightly inclined, and comprising a first channel for circulation of a gas, a second channel for conveying the pulverulent material, and a common porous wall being disposed between first and second channels, the first channel comprising at least one gas feed tube for producing a gas pressure p f for potentially fluidizing the pulverulent material in the second channel, and the second channel comprising at least one balancing column with a filling height balancing the pressure p f of the potential fluidization gas, said hyperdense fluidized meter comprising a housing, a supply column for feeding the housing with pulverulent material from said second channel, a balancing column and an evacuation means for the pulverulent material, said housing comprising first and second parts separated by a porous wall, the first part for circulation of potentially fluidizing gas and provided with at least one gas feed tube for producing a pressure p′ f for potentially fluidizing the pulverulent material in the second part, and the second part for circulation of the pulverulent material from said supply column, to said evacuation means for supplying the pulverulent material to an outlet and to said balancing column that has a filling height for balancing the pressure p′ f , the evacuation means comprising an orifice and an outlet nozzle with an internal diameter greater than that of the orifice, and being disposed at a distance from the supply column sufficient that in the absence of fluidization, it cannot be reached by the foot of the natural angle of repose, and conveying the pulverulent material from the storage facility to each of the outlets by supplying potentially fluidizing gas under controlled pressure p f to the first channel and under controlled pressure p′ f to the first part, thereby potentially fluidizing the pulverulent material in the second channel and the second part.