MÁY ÉP BÙN KHUNG BẢN DRACO _ TORO

DRACO _ FILTER PRESS

Draco filter presses developed by Toro Equipment S.L. are designed for the optimum dehydration of sludge, whether of industrial or urban origin.

The different filter presses  sizes and models are manufactured in St 37-2 Steel, AISI 304 and GRP. The surface finish using epoxy paint protects the filter press from potential corrosion.

The three filter presses models offer a wide range of possibilities where size and number of filter plates are concerned.

The standard sizes are: 470 x 470, 630 x 630, 800 x 800, 1,000 x 1,000 and 1,200 x 1,200.

Draco® Automatic Filter Press FPA

Draco® Automatic filter press is the most complete model in the Draco® range, because it carries out the complete sludge dehydration cycle automatically.

This filter press is provided with the following:

• Hydraulic unit.

• Air circuit for blowing the sludge cakes.

• Safety systems.

• Shaking shaft to make the sludge cakes fall.

• Drain pot.

• Flanges that comply with the regulations

Draco® Semi Automatic Filter Press FPSA

This filter press model is characterized by the filter package closure system, which is operated by a joystick that governs the compact hydraulic unit.

Semi automatic filter press is provided with the following:

• Hydraulic unit.

• Air circuit for blowing the sludge cakes.

• Drain pot.

• Flanges that comply with the regulations.

Draco® Manual Filter Press FPM

Manual filter pres is the simplest model in the Draco® range. It features a pump with a manual lever for operating the filter package opening and closing system.

This filter press is provided with the following:

• Air circuit for blowing the sludge cakes.

• Drain pot.

• Flanges that comply with the regulations.

Mechanism of the filter press

Step 1:Sludge is fed into the filter press by a suitable pumping system and passes through the feed eye of the succeeding plates along the length of the plate pack until all chambers are full of slurry. This is known as the fast fill portion of the filter cycle.
Step 2: Flowing under pressure, the solid particles begin to deposit on the surface of the filter cloth forming the initial layer of filter cake referred to as the pre-coat. Once applied, this pre-coat layer becomes the actual filtering medium.
•  Step 3: As filtering continues the cake thickness gradually increases, until the adjacent filter cake in each chamber touch or bridge. At this point of the filter cycle, the dewatering phase enters into final cake consolidation to achieve maximum cake dryness
•  Step 4: During the consolidation step of the cycle, additional solids are being pumped into the filter chamber to displace more liquid. This results in a dryer, firmer and denser filter cake. This cycle normally continues until liquid flow from the press is reduced to virtually nil. At this point, the feed pump is stopped and the internal pressure within the filter plate pack is relieved.

Step 5: Prior to discharging the filter cake, the cake may be further washed in place for extraction of impurities or neutralization purposes and/or the cake may be blown with air to further remove free moisture and to dry the filter cake .
Step 6: With pressure relieved within the filter plate pack, the hydraulic closure system is actuated to retract the moving head to its fully open position. Once open, each individual filter plate is separated from its adjacent neighbor allowing the filter cake to fall freely from between the separated chambers. With fully mechanized plate shifting devices, the transport speed is adjustable, but averages 6 to 8 plates per minute
Step 7: To begin the next filter cycle, the hydraulic closure system is activated to extend the moving head back to its closed position. As a result, the complete filter plate pack is pushed back and sealed in an operating position. At this point, the filter press is ready to begin another cycle.