Powder fine quantitative storage and transportation delivery device and method thereof

Abstract

The invention relates to a powder fine quantitative storage and transportation delivery device and a method thereof. The powder fine quantitative storage and transportation delivery device comprises a large storage powder hopper, a small powder hopper, a metering screw pump, a negative-pressure air-powder mixing tube, wherein the large storage powder hopper is provided with a box neck; a fine pattern screw is in threaded connection with a plug and the fine-thread screw and the plug are arranged inside of the large storage powder hopper; the upper end of the fine-thread screw is connected with a rotary drive device; the coarse-thread screw and the fine-thread screw are coaxially arranged, and the coarse-screw rod is positioned in the drive powder section; the large storage powder hopper outlet is connected with the inlet of the small powder hopper; a negative feedback degree measurement and control device is install on the upper end of the small powder hopper and measuring rods of the negative feedback degree measurement and control device extend into the small powder hopper; the outlet of the small powder hopper is connected with the inlet of metering screw pump and the outlet of the metering screw pump is connected to the middle necking of the negative-pressure air-powder mixing tube; the outlet of air-power mixing tube is connected with an air and powder mixed delivery pipe. The powder fine quantitative storage transportation delivery device guarantees the synchronous change of the powder volume flow and the mass flow through the screw plug pump and the equal volume movement principle.

Description

technical field [0001] The invention relates to a conveying device and a method for using the same, in particular to a powder fine quantitative storage and conveying device and a method thereof. Background technique [0002] In many industries, powder storage, transportation, supply and other issues are involved, such as: dry powder feeding in petrochemical industry, powder fuel transportation in boiler industry, powder transportation and addition in chemical synthesis, dust fuel transportation in dust engines Wait. [0003] The powder transportation is more difficult, especially the fine quantitative control transportation is more difficult, because the physical and chemical parameters such as powder fluidity, force conductivity, viscosity and so on are not conducive to the continuous flow of transportation. The more serious problem is The mass density (specific gravity) of the powder changes sharply with the pressure change, and the bulk density (volume per unit mass) als...

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Problems solved by technology

[0006] An object of the present invention is to provide a powder fine quantitative storage and transportation device, which is used to solve the current problems of unstable powder collection and transportation process, blockage, volume flow and mass flow cannot be synchronized; Another object of the present invention is to provide a storage and delivery method for this powder fine quantitative storage and delivery device

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