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kelishi丨What should be paid attention to when conveying powder with poor fluidity by pneumatic conveying?

kelishi丨What should be paid attention to when conveying powder with poor fluidity by pneumatic conveying?

  • Categories:News Center
  • Time of issue:2022-05-06 10:37

(Summary description)When conveying powders with poor fluidity by pneumatic conveying, the flow of the material through the conveying pipeline is not very poor, because generally, once the material is entrained in the pipeline, it will fluidize and move. However, this powder is often an abrasive material, which will cause problems in the conveying pipeline over time.   The main challenge in conveying powders with poor flow is getting the material from the feed point into the material line at a constant rate and then getting the powder out of the material receiver again. For poorly flowing, difficult-to-move materials, special attention should be paid to specially designed flow-enhancing devices, suitable filters and filter placement, and vacuum receiver design. In any pneumatic conveying solution, the correct selection of the vacuum pump is critical, so it does not necessarily stand out in the special discussion of the special equipment required for poorly flowing powders. Cohesive and lightweight powders tend to stick and can cause clogging and bridging. A stable product flow into the material line, and for viscous materials, a proper solids-to-gas ratio is critical. If the ratio of solids to air is too high, the lines will clog, and if the ratio of solids to air is too low, you are simply sucking in air and not delivering much material. The feeding device helps to feed the material into the production line at a constant speed.   material equipment The feed point is where the material enters the piping network and leads to the vacuum receiver. The feed point can be a bulk bag unloader that the operator inserts into the barrel, a bag unload station or a stick. For difficult-to-handle powders, specially designed flow-promoting devices, feeding devices can regulate the flow. These are usually some type of vibratory equipment, but sometimes rotary or screw feeders are used where applicable. Zinc oxide and iron oxide are particularly difficult to transport due to their very poor flow properties, and they can even be likened to transport slurries. In one application, a bag maker was used to transfer iron oxide from 50 lb bags into a mixing reactor. Operators use a bag discharge station to place bags on racks at the station, cut the bags open, and the powder falls into a collection funnel, where it is vacuumed from the bottom of the collection funnel into a conveyor line. In this particular application, the flow properties of the material are so bad that the material doesn't want to move from there. To get the product into the line, a specially designed electrified agitator is required, i.e. a hopper on a rubber isolator, with a vibrating vibrator that shakes the spout, allowing the material to flow into the feed adapter and into the airflow. Additionally, the bag unloading station includes a unit that draws in outside air to prevent dust from entering the operator's surroundings. In this case, the filter within the unit must be suitable for zinc oxide. Incorrect filters can become covered in dust, blocking airflow and blocking the machine.   filter Filter material, number of filters, placement and cleaning cycles are extremely important for poorly flowing materials. At the top of the material receiver housing, a filter separates the product from the clean air returning to the vacuum generator. With ultrafine powders, the filter can clog and block the entire delivery process. Carbon black is a superfine powder, so good that it's joked that it gets into the creases of wrinkles. In one application, the task is to recover residual carbon black from the bottom of the tram, which is then discharged into super sacks. However, during the discharge cycle, only 2-3 pounds will fall into the super bag. After testing with flow boosting, vibration, and various other tricks, it was found that even with automatic pulse filter cleaning, the material got caught between the filter socks. The solution is to provide the new filter plate with fewer filters but as large a filter area as possible to prevent material from hanging up between the filters.   Receiver Design The angled surfaces provide some areas where poorly flowing material can bridge or hang. Providing a straight wall vacuum receiver eliminates sloping surfaces, allowing positive discharge without auxiliary vibration or agitation. The straight-wall construction terminates in an automatic drain valve the same size as the tube, allowing quick passage of even the most difficult non-free-flowing materials. To sum up the above, after scientific research, the best way to pneumatically convey powders with poor flow comes from fine-tuning the customer's material, and knowing which components will move the material the slowest, reducing pipe wear and material degradation.

kelishi丨What should be paid attention to when conveying powder with poor fluidity by pneumatic conveying?

(Summary description)When conveying powders with poor fluidity by pneumatic conveying, the flow of the material through the conveying pipeline is not very poor, because generally, once the material is entrained in the pipeline, it will fluidize and move. However, this powder is often an abrasive material, which will cause problems in the conveying pipeline over time.



 

The main challenge in conveying powders with poor flow is getting the material from the feed point into the material line at a constant rate and then getting the powder out of the material receiver again.

For poorly flowing, difficult-to-move materials, special attention should be paid to specially designed flow-enhancing devices, suitable filters and filter placement, and vacuum receiver design. In any pneumatic conveying solution, the correct selection of the vacuum pump is critical, so it does not necessarily stand out in the special discussion of the special equipment required for poorly flowing powders.

Cohesive and lightweight powders tend to stick and can cause clogging and bridging. A stable product flow into the material line, and for viscous materials, a proper solids-to-gas ratio is critical. If the ratio of solids to air is too high, the lines will clog, and if the ratio of solids to air is too low, you are simply sucking in air and not delivering much material. The feeding device helps to feed the material into the production line at a constant speed.



 

material equipment

The feed point is where the material enters the piping network and leads to the vacuum receiver. The feed point can be a bulk bag unloader that the operator inserts into the barrel, a bag unload station or a stick. For difficult-to-handle powders, specially designed flow-promoting devices, feeding devices can regulate the flow. These are usually some type of vibratory equipment, but sometimes rotary or screw feeders are used where applicable.

Zinc oxide and iron oxide are particularly difficult to transport due to their very poor flow properties, and they can even be likened to transport slurries. In one application, a bag maker was used to transfer iron oxide from 50 lb bags into a mixing reactor. Operators use a bag discharge station to place bags on racks at the station, cut the bags open, and the powder falls into a collection funnel, where it is vacuumed from the bottom of the collection funnel into a conveyor line. In this particular application, the flow properties of the material are so bad that the material doesn't want to move from there. To get the product into the line, a specially designed electrified agitator is required, i.e. a hopper on a rubber isolator, with a vibrating vibrator that shakes the spout, allowing the material to flow into the feed adapter and into the airflow.

Additionally, the bag unloading station includes a unit that draws in outside air to prevent dust from entering the operator's surroundings. In this case, the filter within the unit must be suitable for zinc oxide. Incorrect filters can become covered in dust, blocking airflow and blocking the machine.



 

filter

Filter material, number of filters, placement and cleaning cycles are extremely important for poorly flowing materials. At the top of the material receiver housing, a filter separates the product from the clean air returning to the vacuum generator. With ultrafine powders, the filter can clog and block the entire delivery process.

Carbon black is a superfine powder, so good that it's joked that it gets into the creases of wrinkles. In one application, the task is to recover residual carbon black from the bottom of the tram, which is then discharged into super sacks. However, during the discharge cycle, only 2-3 pounds will fall into the super bag. After testing with flow boosting, vibration, and various other tricks, it was found that even with automatic pulse filter cleaning, the material got caught between the filter socks. The solution is to provide the new filter plate with fewer filters but as large a filter area as possible to prevent material from hanging up between the filters.



 

Receiver Design

The angled surfaces provide some areas where poorly flowing material can bridge or hang. Providing a straight wall vacuum receiver eliminates sloping surfaces, allowing positive discharge without auxiliary vibration or agitation. The straight-wall construction terminates in an automatic drain valve the same size as the tube, allowing quick passage of even the most difficult non-free-flowing materials.

To sum up the above, after scientific research, the best way to pneumatically convey powders with poor flow comes from fine-tuning the customer's material, and knowing which components will move the material the slowest, reducing pipe wear and material degradation.

  • Categories:News Center
  • Time of issue:2022-05-06 10:37
  • Views:
Information

When conveying powders with poor fluidity by pneumatic conveying, the flow of the material through the conveying pipeline is not very poor, because generally, once the material is entrained in the pipeline, it will fluidize and move. However, this powder is often an abrasive material, which will cause problems in the conveying pipeline over time.

科里时丨以气力输送方式输送流动性差的粉末,应注意哪些?

 

The main challenge in conveying powders with poor flow is getting the material from the feed point into the material line at a constant rate and then getting the powder out of the material receiver again.

For poorly flowing, difficult-to-move materials, special attention should be paid to specially designed flow-enhancing devices, suitable filters and filter placement, and vacuum receiver design. In any pneumatic conveying solution, the correct selection of the vacuum pump is critical, so it does not necessarily stand out in the special discussion of the special equipment required for poorly flowing powders.

Cohesive and lightweight powders tend to stick and can cause clogging and bridging. A stable product flow into the material line, and for viscous materials, a proper solids-to-gas ratio is critical. If the ratio of solids to air is too high, the lines will clog, and if the ratio of solids to air is too low, you are simply sucking in air and not delivering much material. The feeding device helps to feed the material into the production line at a constant speed.

科里时丨以气力输送方式输送流动性差的粉末,应注意哪些?

 

material equipment

The feed point is where the material enters the piping network and leads to the vacuum receiver. The feed point can be a bulk bag unloader that the operator inserts into the barrel, a bag unload station or a stick. For difficult-to-handle powders, specially designed flow-promoting devices, feeding devices can regulate the flow. These are usually some type of vibratory equipment, but sometimes rotary or screw feeders are used where applicable.

Zinc oxide and iron oxide are particularly difficult to transport due to their very poor flow properties, and they can even be likened to transport slurries. In one application, a bag maker was used to transfer iron oxide from 50 lb bags into a mixing reactor. Operators use a bag discharge station to place bags on racks at the station, cut the bags open, and the powder falls into a collection funnel, where it is vacuumed from the bottom of the collection funnel into a conveyor line. In this particular application, the flow properties of the material are so bad that the material doesn't want to move from there. To get the product into the line, a specially designed electrified agitator is required, i.e. a hopper on a rubber isolator, with a vibrating vibrator that shakes the spout, allowing the material to flow into the feed adapter and into the airflow.

Additionally, the bag unloading station includes a unit that draws in outside air to prevent dust from entering the operator's surroundings. In this case, the filter within the unit must be suitable for zinc oxide. Incorrect filters can become covered in dust, blocking airflow and blocking the machine.

科里时丨以气力输送方式输送流动性差的粉末,应注意哪些?

 

filter

Filter material, number of filters, placement and cleaning cycles are extremely important for poorly flowing materials. At the top of the material receiver housing, a filter separates the product from the clean air returning to the vacuum generator. With ultrafine powders, the filter can clog and block the entire delivery process.

Carbon black is a superfine powder, so good that it's joked that it gets into the creases of wrinkles. In one application, the task is to recover residual carbon black from the bottom of the tram, which is then discharged into super sacks. However, during the discharge cycle, only 2-3 pounds will fall into the super bag. After testing with flow boosting, vibration, and various other tricks, it was found that even with automatic pulse filter cleaning, the material got caught between the filter socks. The solution is to provide the new filter plate with fewer filters but as large a filter area as possible to prevent material from hanging up between the filters.

科里时丨以气力输送方式输送流动性差的粉末,应注意哪些?

 

Receiver Design

The angled surfaces provide some areas where poorly flowing material can bridge or hang. Providing a straight wall vacuum receiver eliminates sloping surfaces, allowing positive discharge without auxiliary vibration or agitation. The straight-wall construction terminates in an automatic drain valve the same size as the tube, allowing quick passage of even the most difficult non-free-flowing materials.

To sum up the above, after scientific research, the best way to pneumatically convey powders with poor flow comes from fine-tuning the customer's material, and knowing which components will move the material the slowest, reducing pipe wear and material degradation.

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