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What kind of long-distance powder pneumatic conveying equipment
2019-09-16 Source: wglobalnba.com Author: Rich Machinery read: Times
When the conveying distance is more than 400m, it is more cost-effective and practical to use the silo pneumatic conveying. The silo pneumatic conveying system generally uses compressed air as the power source for long-distance pipeline transportation of powdery materials. The QPB warehouse type pneumatic conveying pump uses a pressure vessel as a transmitter, and combines the characteristics of a differential pressure transmitter and a push transmitter. The gas is divided into three channels: upper, middle and lower, and enters the transmitter. The top gas is converted into static pressure energy pressure. When feeding materials, the middle gas plays a fluidizing role, and the materials are transported through the bottom inflation device. The middle and bottom gases are converted into dynamic pressure energy to transport materials. The air supply is provided by the air compressor, and the pressure of the compressed air source is usually 0.5-0.75MPa.
For long-distance pneumatic conveying, several blowing aids can be installed on the conveying pipe, and the air pipes of the blowing aid enter the conveying pipe from both sides. During the conveying process, part of the material deposited in the pipeline is accelerated by compressed air supplemented in time, and is in a group flow or plug-like movement, which forms a rapid dune-like movement in the later stage of transportation. During normal transportation, the transportation pressure should fluctuate within the range of 0.25-0.35MPa.
Long-distance silo type pneumatic conveying pump is intermittent conveying. When all the material enters the pipeline, the pneumatic gate valve at the outlet of the silo pump is closed, and the material is continued to be transported in the pipeline by the power of the blowing aid device. Residual compressed gas in the tank pump is discharged from the exhaust valve, exhaust pipe, etc. At the same time, the feed valve is opened to start feeding. When the tank pump is filled with materials for the next cycle, the tank pump is first charged to When the pressure feedback from the first group of blowing aids is equal, the pneumatic gate valve opens and the delivery starts. During the whole conveying process, the conveying pipeline is intermittently filled with powdery materials with high mixing ratio
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