How is positive and negative pressure pneumatic conveying implemented, and how should we choose?
??UnderstandingPositive and negative pressure pneumatic conveying systemBefore, everyone should understand the positive pressure pneumatic conveying system and the negative pressure pneumatic conveying system. The positive pressure pneumatic conveying system is: "The fan fully mixes air and materials in the pipeline, and the mixed materials are pressed into the separator for separation in the pipeline. Finally, the conveyed materials are discharged from the shoe material port at the bottom, and the air returns to the atmosphere after dust removal; So the negative pressure pneumatic conveying system is:The air and powder particles in the warehouse pump are thoroughly and evenly mixed, and then pumped into the material sealing pump through the pipelinePneumatic conveying systemDuring the transportation process, the pressure value of the entire pipeline is lower than the atmospheric pressure. ObviouslyPositive and negative pressure pneumatic conveyingIt's just combining them together
? The pipeline is evacuated using a Roots vacuum pump, and the material is sucked into the silo through a suction nozzle. The material in the silo is then discharged using a rotating feeder and positive pressure. A dust collector is installed between the Roots vacuum pump and the silo to filter the dust and return it to the silo. This makes transmission safer and more reliable, with longer transmission distances.
The materials suitable for conveying positive and negative pressure are:PVC powder, nano calcium carbonate, ternary materials, lithium iron phosphate, lithium battery raw materials, flour, vitamin A powder, white sugar, milk powder, carbon black, aluminum powder, rubber additives, graphite, iron powder, catalyst, gypsum powder, molybdenum oxide, quartz sand, talc powder, bauxite, bentonite, calcium carbonate, caustic soda, lime powder, magnesium oxide, kaolin, fly ash, brick ash, boiler ash, cement, alumina, ceramic powder, rare earth materials, etc
The advantages of positive and negative pressure pneumatic conveying systems are:
1. The combination of positive and negative pressure pneumatic conveying has strong performance and can be used for various powder and particle conveying conditions
2. It can perform multi-point suction to a single point, and can also blow from one point to multiple points
3. It can achieve continuous conveying and fluidized conveying
4. The negative pressure suction and conveying distance can reach 50m, and the positive pressure blowing distance can reach 200m
5. The negative pressure suction system also has a certain material cooling effect, which is dust-free and environmentally friendly
6. The conveying pressure and conveying speed have a stable material to gas ratio, and the operation is reliable and easy to maintain
Positive and negative pressure pneumatic conveying systemBy combining the advantages of positive pressure pneumatic conveying and negative pressure pneumatic conveying, the transmission distance is longer and the transmission becomes more stable and reliable. However, its disadvantage is also obvious, which is the increase in cost. You can choose your own suitable conveying method based on the different materials and distances being conveyed.