Production of pneumatic conveying system equipment (comparison of advantages and disadvantages of suction type and pressure type)

Comparison of the advantages and disadvantages of suction type and pressure feeding type
Advantages
Points
Suction type
Pressure feeding type
, no dust in material removal and no dust in transportation
, suitable for conveying situations such as bulk, low-lying areas, broken bags, etc.
The air source is at the end, lubricating oil, moisture, etc. will not be mixed
. There is a negative pressure vacuum state in the pipeline, and the material will not Leakage
, air treatment is convenient, suitable for occasions requiring clean air transportation
, suitable for centralized transportation from multiple places to one place
, the gas temperature during transportation can dry the material
, there is positive pressure inside the system, and the materials are easy to discharge
There is a positive pressure in the pipeline, even if there are gaps in the system connections, the atmosphere and rain will not affect the materials in the pipeline
, compared with negative pressure conveying, the energy consumption is lower and the conveying distance is longer
Disadvantages
Disadvantages
Generally, the working vacuum degree is less than that, so the conveying volume and conveying distance cannot be obtained at the same time
Maximum value
Compared with positive pressure transportation, negative pressure consumes more than positive pressure
. Reliable separation and dust removal devices must be installed before separation of material and gas.
The requirements of the unloader are very high. If the sealing is not good, leakage will cause system instability. Feeding device
When using Roots blower as the air source, the pressure cannot be too high, so the conveying distance
has certain restrictions, usually meters
and must be used with good airtightness Feeding device
Use
Use
Site
Closure
, manual feeding
, bulk material, ground material retrieval
, start Material conveying in bag feeding station
, taking materials when the height of the taking point is limited
, conveying toxic materials
, conveying multiple discharge ports to one place
, conveying large particles
, special gas transportation