Rotary vacuum drum precoat filter, as its name describes, is one kind of filtrate separating equipment by precoating a bed of diatomaceous earth or similar material before filtering the suspension. It is also named pre-spreading vacuum drum filter or rotary drum precoat filter. With the precoat adsorbed on the surface of the rotary drum, the filter can discharge filter cakes automatically in coordination with scraper blades. It can automatically carry out continuous operation under the condition of vacuum filtration. Rotary drum precoat filters provide a high clarity of filtrate when the filtrate is the valuable product and the cake is to be discarded. So it is widely used in industrial sectors such as food, medicine, organic chemistry, waste water treatment and grease.
Rotary vacuum drum precoat filter has two operation processes in the filtering cycle:
First, precoat the filter medium. Pour the filter medium mixture into the reservoir. Along with the rotation of the drum, there will be one layer of continuously thickening filter medium on the outside surface of the filtration chamber under the effect of vacuum suction. This operation lasts until the filter medium reaches a desired thickness. Then drain the rest of the filter medium mixture through drain connection.
Second, inject the suspension that needed to be filtered, and the filtration process begins. Liquid in the suspension becomes high clarity filtrate through two layers of filter medium under the effect of vacuum suction. During the filtration cycle, the scraper blade shaves the residue off, which makes the filter medium coating thin and update constantly and ensures the filtering to go ahead continuously.
|Model||Filter area (m2)||Drum diameter (mm)||Drum speed (r/min)||Scraper feed speed (mm/min)||Agitator motor power (kW)||Dimension (mm)||Equipment weight (kg)|
|GF10/1.6||10||1600||0.5-3.0||0.05-0.2||0.75 + 0.37||3210 × 2610 × 2210||2960|
|GF20/2.0||20||2000||0.5-3.0||0.05-0.2||1.1 + 0.37||4410 × 3010 × 3610||3800|
|GF30/2.4||30||2400||0.5-3.0||0.05-0.2||1.5 + 0.37||5210 × 3410 × 3010||6520|
|GF40/3.3||40||3300||0.5-3.0||0.05-0.2||2.2 + 0.37||5100 × 4500 × 3800||8890|
|GF50/3.3||50||4330||0.5-3.0||0.05-0.2||2.2 + 0.37||6100 × 4500 × 3800||10780|
|GF60/3.3||60||3300||0.5-3.0||0.05-0.2||2.2 + 0.37||7100 × 4500 × 3800||13988|
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