We fill powders from bulk bags which contain 1000 kgs into smaller bags about 10 - 15 kgs.
We are currently using a big overhead hopper (located at the mezannine) to load granulated or fine powder. The capacity is about 3 cubic meters and takes the shape of an inverter pyramid section.
This is then conveyed down by a screw conveyor to a smaller hopper (located at the ground floor).
The smaller hopper is part of a filling system which is governed by weight settings. Capacity is about 0.5 cubic meters and is conical.
The small hopper has a chute which acts as a valve and is electro-pneumatically opened or closed. It is opened or closed based on the target weight set. Weight is measured and controlled by a weighcell.
We are trying to build another line and before proceeding, I would like feedback on the following:
BIG HOPPER
1. Besides the current design, are there other geometries which are better?
2. What are the design considerations? Slope, etc.?
3. What are the options in loading the big hopper? Currently, it is by hoist.
4. How do we control dust during loading?
5. Where do we put dust collecting suction points? Size and quantity?
6. Due to weight material in the hopper, there is a tendency to clump the materials. This leads to difficulty dispensing to the smaller hopper. How can we prevent or minimize?
CONVEYING FROM THE BIG HOPPER TO THE SMALL HOPPER
6. How can we convery material from the big hopper to the small hopper better?
SMALL HOPPER
7. Are there other products out there that are used for opening and closing the chutes? In particular, what valves are mostly used in small hoppers - manual and pneumatic?
Query on Conveying Granulated and Fine Powders
We fill powders from bulk bags which contain 1000 kgs into smaller bags about 10 - 15 kgs.
We are currently using a big overhead hopper (located at the mezannine) to load granulated or fine powder. The capacity is about 3 cubic meters and takes the shape of an inverter pyramid section.
This is then conveyed down by a screw conveyor to a smaller hopper (located at the ground floor).
The smaller hopper is part of a filling system which is governed by weight settings. Capacity is about 0.5 cubic meters and is conical.
The small hopper has a chute which acts as a valve and is electro-pneumatically opened or closed. It is opened or closed based on the target weight set. Weight is measured and controlled by a weighcell.
We are trying to build another line and before proceeding, I would like feedback on the following:
BIG HOPPER
1. Besides the current design, are there other geometries which are better?
2. What are the design considerations? Slope, etc.?
3. What are the options in loading the big hopper? Currently, it is by hoist.
4. How do we control dust during loading?
5. Where do we put dust collecting suction points? Size and quantity?
6. Due to weight material in the hopper, there is a tendency to clump the materials. This leads to difficulty dispensing to the smaller hopper. How can we prevent or minimize?
CONVEYING FROM THE BIG HOPPER TO THE SMALL HOPPER
6. How can we convery material from the big hopper to the small hopper better?
SMALL HOPPER
7. Are there other products out there that are used for opening and closing the chutes? In particular, what valves are mostly used in small hoppers - manual and pneumatic?
Hope you can help me with these. ■