vacuum drum filter Press consists of a drum rotating in a tank of slurry to be filtered.
The technique is well suited to liquid with a high solid content, which could clog other forms of filters. The drum can be pre-coated with a filter aid, After pre-coat has been applied, the liquid to be filtered is sent to the tank below the drum. The drum rotates through the liquid and the vacuum sucks liquid and solids onto the drum pre-coat surface, the liquid portion is "sucked" by the vacuum through the filter media to the internal portion of the drum, and the filtrate pumped away. The solids adhering to the outside of the drum, which then passes a scrapper, coming off the drum and a small portion of the filter media to reveal a fresh media surface that will enter the liquid as the drum rotates.

Features of vacuum filter
1.) Fully stainless steel with no corrosion by the raw material
2.) Compact structure and upgraded design
3.) Speed of rotating drum can be adjusted according to customers' demand.
4.) Material unloaded through scraper blade, which is made of high rigid alloy and can be adjusted.
5.) Low energy consumption, small floor area.
6.) Stable operation, low maintenance

Typical Technical Data

Installation & Commissioning

Please pay attention to following instructions during installation:

1       Lifting the drum only via designed hooks, not other parts. The rope should not squeeze the drum during lifting process.

2       Drum press should be installed on flat concrete foundation and bolted properly. Please refer to drawings for detailed dimensions. Horizontal deviation of tank for installation should be not more than 0.3mm per meter.

3       The connection pipe between drum filtration outlet and fixed pipe should be flexible. Pressure between Rotary gas disk and fixed gas disk should be adjusted accordingly via retainer spring to ensure tight seal.

4       Overflow outlet must connect with overflow pipe, and install a valve when necessary according to slurry condition in order to control the slurry depth in the tank and make the overflow slurry return to slurry tank.

5       Filter cloth installation: wrap the filter cloth (if requested) around the rubber backup filter plates and fixed the end in the slot via polyester rope. Material, thickness and mesh sizes of filter cloth should be selected based on slurry condition and process control. In order to reduce the possibility of off-tracking and folding of filter cloth, filter cloth should be pressed flat before installation.

6       The storage tank has to be cleaned before commissioning in order to avoid damage of filter cloth and parts by hard articles. Lubrication and try to start the motor and check if rotating direction is correct. Keep the machine running for half an hour and check if all parts are functioning well before feeding slurry.

7       Rotating speed should be adjusted based on slurry condition, process and output capacity demand.

Operation Instructions

After correct installation and commissioning, please operate the machine based on following process:

1.Start preparation→2. Start → 3. Slurry feeding → 4. Start vacuum pump → 5. Filtration → 6. Stop slurry inlet valve → 7 shut down vacuum pump → 8. Shut down the machine.

1. Start preparation

Before starting the machine, please check and make sure there are no other articles at storage tank, drum, filter cloth, etc.. Filter cloth is properly fixed, lubrication oil are at proper level for all transmission systems. Wire connection of motors are correct and rotating direction is as instructed on the machine.

2. Start the drum

Start the drum motor (adjust the speed from low to high till meeting request), monitor the rotation status. Please shutdown the machine immediately if it is not functioning well or working abnormally.

3. Feeding Slurry

Feed the slurry uniformly and adjust feeding capacity to keep the slurry depth reaching the overflow outlet.

4. Start vacuum pump

Vacuity degree should be adjusted based on slurry condition to reach optimal performance. Vacuum pressure are normally kept at 0.04 to 0.08MPa.

5. Filtration

Monitor the changes of vacuum pressure and water outlet condition, adjust the machine timely and accordingly if not functioning well.

6. Close inlet valve.

Close the slurry inlet valve when you need stop the filtration.

7. Shutdown vacuum pump

After slurry inlet is closed, keep the drum and vacuum pump working until the slurry level is below the bottom of drum; then close the vacuum pump.

8. Shutdown the machine

After the filtration, wash the drum, tank, filter cloth, scraper, etc. to make sure it is clean in order to maintain the filtration effect next time. Shutdown the drum motor after cleaning.

Maintenance

Proper maintenance is critical to keep the machine functioning well and to extend the machine’s working life.

 1. After one week of operation of the new machine, please drain the lubrication oil of all transmission parts. Change the lubrication oil every 3 to 6 months after the first time. Please keep an eye on the lubrication status of transmission and bearing parts during regular working process. Transmission system should use 20#--30# mechanical oil, frictional stepless transmission bearing should use lime base grease ZG-1.

2. Slurry solid rate should be kept as consistent as possible to avoid affecting filtration efficiency. Adjust the rotation speed accordingly when solid rate changes.

3. Please always keep an eye on the moving parts for abnormal noises, loose bolts, jamming, etc. and deal with it timely.

4. For safety purpose, please strictly follow the below protocols:

  (1)Non-operational staff should not be allowed to start the machine.

  (2)Lubricating during operation process is not allowed at all times.

  (3)Lifting the protection cover is not allowed during operation.

  (4)Examine and repair on the machine is not allowed during operation process.