Metering system, dense phase conveying system and method for supplying bulk material in powder form

Metering device, which comprises a metering container and at least one airlock arranged upstream, for the steady, continuous, dosed supply of a bulk material in powder form made of light, polydisperse particles from a supply device into a plurality of conveying tubes to a consumer arranged downstream, the metering container and the airlock each comprising a delivery device,

• and wherein a mass flow measuring probe being arranged on each conveying tube and the metering device having a pressure regulation device for regulating a differential pressure between the metering container and the consumer,
• wherein
• the delivery device of the metering container, for each of the conveying tubes, comprises a dust flow regulation device, which is assigned thereto and opens therein,
• wherein the mass flow measuring probe being coupled to the dust flow regulation device, which opens into the corresponding conveying tube, and
• the delivery device of the airlock opening via a dust flow regulation device into the metering container, the pressure regulation device,
• for a first differential pressure regulation between an airlock pressure and a metering container pressure, at least being coupled to a pressure measuring device assigned to the airlock and a pressure measuring device arranged on the metering container,
• for a second differential pressure regulation between a metering container delivery pressure and a consumer pressure, being coupled to a pressure measuring device assigned to the delivery device of the metering container and a pressure measuring device of the consumer, which comprises the regulation of the differential pressure between the metering container and the consumer, the pressure regulation device controlling the metering container pressure as a function of at least the second differential pressure regulation, and wherein the pressure regulation device,
• for a first differential pressure control between a supply device pressure and the airlock pressure, being coupled to a pressure measuring device assigned to the supply device and the pressure measuring device of the airlock, and
• controlling the airlock pressure as a function of at least one airlock fill level and the first differential pressure control by an actuation of at least one suction device, which can be coupled to the airlock.