Product Application

Disc vacuum filter is a soild-liquid separation equipment, which is separating solid from liquid through vacuum as filter power.
  The machine uses a filter plate skid-oriented; speed shift mixing, anti-air discharge; centralized lubrication and other advanced technologies, it is an excellent, reliable operation of the dewatering equipment.
  This machine is a kind of new disc vacuum filter specifically designed for iron concentrate, nonferrous metals concentrate dehydration, and it is also suitable for washing coal, ore dressing, non-metallic mineral, chemical, environmental protection industry.

Basic structure

The machine structure drawing is as Figure (1), it mainly consists of a tank, and the spindle gear, guide and discharging device, left and right distribution head, stirrer, filter cloth cleaning device, automatic centralized lubrication device, feeding system, automatic electric control system.

(1) Filter plate

the structure is as Figure 2. GPT—10-40m2 disc vacuum filters usually have 2-8 plates, each plate has 20 fans. The structure is: filter cloth bags 2 is on fan 1, through the screw, nut 3 and plate4 , fix fans and filter cloth on the spindle filter pipe to form circular filter plate.

（2）Spindle transmission device

Spindle transmission: transmission is composed by bull gear, belt, the larger pulley, pinion, reducer, due to adopting variable speed motors, spindle speed can be adjusted variable to meet different working conditions.

（3）Spindle and mixture equipment

Spindle and mixture equipment are the main working parts, the structure is shown in Figure (3), the spindle is mainly made up from the central axis 21, the filtrate tube 11, filter plate socket 9, the control panel 5 and so on. Central axis made by a thick-walled steel pipes, has sufficient rigidity and torque torque and bending moment to withstand strength, 20 into the filtrate tube axis in the center ring are the circumference of cloth, the filter fan filter head into the filtrate tube fan socket 9, the filtrate in the vacuum pump to suck on, the filtrate control valve unit excluded from the outside.

The mixture equipment is the critical part controlling the filtrate process, it consists of left and right distribution heads. Under the distribution head is filtrate output connecting with vacuum pipe, the top is vacuum gauge, to observe vacuum degree. Left and right distribution heads include two distribution head 2 & 14 and left right distribution plate 4 & 12, the head fixed together with plate through connecting bolt.

the spindle supported on the bearings 6, is driven by the large gear 20 and its driver device. Distribution head hangs in the bearing housing by pin13, screw1,18, etc, and pressed through the spring and the spindle, thus ensuring the sealing of distribution plate and friction disc. During the spindle operation, all groups filtrate fans arranged along the filtrate tube pass adsorption area followed by dry area, unloading cake area and washing area, so that complete the filtration operation again and again.

  Distribution plate and friction disc are made of special cast iron with excellent abrasion resistance, long life, good seal, the airway between left and right distribution plate is slightly different.

（4）stirrer

In order to prevent slurry sediment, the lower part of the tank has mixing device with blades, stirring shaft with stirring blades on is paralleled with the spindle, stirring constantly in the slurry between the filter plate. The drive device is made of a velocity modulation motor, cycloidal pin wheel reducer, chain drive, whose structure shown in Figure (4). This machine is stepless speed rugulating agitation, can be selected different mixing speed for different materials. To meet some materials of large sedimentation rate, the machine is equipped with a larger mixing motor power, generally has a surplus. Agitation shaft has water sealing at both ends, while working continuously inject 0.02-0.03Mpa pressure of water, to ensure the sealing, (showed in Figure 3).

（5）guide and discharging device

The machine adopts guide plate and the reverse wind means to discharge materials, in the discharge area, firstly plump the filter cloth up through reverse blowing, guides cake removed from the filter plate under gravity, the combined unloading mode can achieve high cake discharge rate. Reverse blowing lead wind into filter fans through the distribution head, distribution plate and filtrate tube, the anti-hair wind pressure is 0.02-0.03Mpa, air volume can be determined by filter area 0.2-0.3m3/min per square meter.

（6）filter cloth cleaning device`

In order to prevent clogging filter cloth, the filter cloth cleaning equipment is installed, cleaning cycle is up to the nature of the material, in general, each 200 working hours cleaning cloth once, and each time for 60 minutes, required water pressure 0.3-0.4Mpa , while cleaning the slurry in tank body should be emptied.

（7）automatic centralized lubrication device

The device can timely do forced lubrication on most of lubrication points. The parts not suitable for automatic lubrication are still conducted using artificial oil lubrication. The requirement of various lubrication points showed in the section "routine maintenance and major issues".

（8）automatic control device

Detailed description of the device, see "Appendix: Electrical operation and control instructions" section. The machine electrical circuit drawing is showed in Appendix III.

（9）tank body

The tank, as the machine supporting parts and pulp container, is made of welded steel, tank bottom take protection by wear-resistant coating and has a slurry overflow vent on the tank to guarantee a quite water level height, and the slurry discharge mouth, filter cake outlet, and so on.

（10）feeding device

It consists of feeder trough and feeding tube, and connecting to the site feeder system can achieve continuous feed.

working principle