Method and system for negative-pressure dense-phase conveying

Abstract

The invention discloses a method and a system for negative-pressure dense-phase conveying. A material in storage equipment enters a conveying pipe through a control unit; a power device at the tail end of the conveying pipe is used to generate a negative pressure in the conveying pipe; a gas enters the conveying pipe through an entrance filter, and at the same time, the material is charged under the control of the control unit; the mass ratio of the material to the gas in the conveying pipe is greater than 10; blocking columns are formed in the pipe; the pressures before and behind each blocking column have a difference, and the material is pushed to move to target equipment under the action of the pressure difference; the material in the gas is recovered to the target equipment after passing through separation equipment; and the gas separated out is directly discharged from an exit filter. The method and the system are applicable to material conveying within 200 meters and have the advantages that: the flow rate is low; the material damages and pipe wear are reduced; and the rate of high-quality products is improved.

Description

technical field [0001] The invention relates to material conveying technology, in particular to a negative pressure dense phase conveying method and system. Background technique [0002] In many industries such as petroleum, chemical industry, medicine, grain, food, electric power, building materials, metallurgy, mining, etc., there are powder and granular materials conveying. During the conveying process, there are problems of mutual pollution of materials to the environment and the environment to materials. On the one hand, some materials are corrosive and irritating, and they are harmful to the human body and pollute the environment when transported in an open state, that is, the materials pollute the environment; on the other hand, some materials are easily oxidized, Hygroscopicity and other characteristics, if transported in an open state, the material will undergo a qualitative change, that is, the environment will pollute the material. Therefore, the use of closed pi...

AI Technical Summary

Problems solved by technology

In the actual process, many working conditions need to be sucked by negative pressure. The usual negative pressure sucking is easy to cause the material to be broken by strong friction with the pipeline under the push of high-speed airflow, which seriously affects the quality of the material.

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