The Walair 4-way Drum-separator is separating one waste stream in 4 waste streams, a heavy, middle and light and very light fraction.
Working principle of the 4-way Drum separator
After the screen with discharge conveyor the input fraction will be imported to a fast running speedup conveyor.
The conveyor is adjustable in a horizontal and vertical position and in an angle.
We advise to supply the conveyor with a frequency regulator, so the speed can be adjusted between 1 – 2.2 m/sec.
Below the conveyor a blow mouth is installed. The blow mouth is adjustable in a horizontal and vertical position and in an angle. To adjust the air flow, the blow mouth is executed with 2 air regulation valves and can be adjusted in angle.
The speedup conveyor is air tide connected to a separation room with a rotating heavy metal drum with a diameter of 1000 mm.In the separation room, using the blowing capacity of the blow mouth and the suction capacity above the separating drum, the heavy fraction is removed from the middle heavy and the light fraction.
Both the inlet, as the distance to the drum till the discharge chute to the expansion room, can be adjusted in height and angle.Along the front of the drum, the heavy fraction is, by means of a chute, discharged to a discharge conveyor.
In the separation room the middle heavy and the light fraction is blown and extracted over the drum and discharged into the first expansion room.
In this expansion room the air is separated from the middle heavy and the light fraction.
Under the expansion room a discharge conveyor transports the middle heavy and the light fraction to a second drum separator.
This separator also consists of a separation drum and a blow mouth .
The middle heavy fraction is, by means of a chute, discharged to a discharge conveyor .
The light fraction is separated in the separation room and blown and extracted over the drum and discharged in the second expansion room. Below this sedimentation room a discharge conveyor transports the light fraction to a third drum separator.
The light fraction is, by means of a chute, discharged to a discharge conveyor . The very light fraction is separated in the separation room and blown and extracted over the drum and discharged in the third expansion room Below this expansieonroom a discharge conveyor transports the very light fraction to the outlet of the separator
To create a suction flow above three the separation drum, the expansion rooms are executed with 2 extraction ducts which are, by means of two suction ducts connected to three fan separators. One fan for each separator The fans extract for 100% the air out of the two expansion rooms.
In the fans the air is separated in an air dust flow of approx. ± 20%, and a blow air flow of ± 80%.
With the blow air flow the fraction is pushed against and over the separation drum.
The air dust flow (20%), containing the dust, is discharged to the dust filter.
The three fan separators are executed with two regulation valves. These valves determine the amount of air to the blow mouth and the amount of air which must be discharged to the dust filter.
We advise to supply the fan separators with frequency regulators, so the airspeed can be adjusted.
By using these possibilities and the adjustments on the speed-up conveyor of the drumseparator and adjustment possibilities on the second drumseparator, the 4-way separator can easily be adjusted for different input flows and fraction sizes.
The special fan separators allow the installation to work with a relatively small dust filter, due to the circulation of ± 80% of the total air capacity.