Products Description
After biological treatment and the clarifier, the effluent still carries fine solids: small sludge flocs, colloids, and the phosphorus and nitrogen bound to them. A rotary drum filter is the polishing step that takes them out, so the water meets discharge or reuse limits. It doesn't remove dissolved ammonia or nitrate. With coagulant dosing ahead of it, it can also help lower total phosphorus.
Water runs into the inside of a slowly turning drum covered with a fine stainless steel screen. Clean water passes through the screen by gravity, and the solids stay on the inner surface. A level sensor starts the drive and the backwash pump when water arrives. The pump takes filtered water and sprays it from nozzles above the drum in an umbrella-shaped, high-pressure jet, from the outside of the screen to the inside. The solids wash off into a collection tank inside the drum and leave through the sewage pipe. Filtering and cleaning don't interrupt each other, and the unit stops by itself when no water is passing.
Specification
|
Inlet |
ss≤30mg/L, peak value is 60mg/L |
|
Outlet |
ss≤10mg/L |
|
Average filter speed |
220m/h |
|
Backwash water volume |
≤0.3% |
|
Backwash pressure |
0.7Mpa |
|
Head loss |
≤0.3m |
|
Filter material |
SS316 |
|
medium temperature |
normal temperature |
|
Model |
ZGL-1000 |
ZGL-2000 |
ZGL-3000 |
|
Flow rate(m³/day) |
1000 |
2000 |
3000 |
|
Filter area(㎡) |
0.5 |
1 |
1.5 |
|
Outlet DN |
DN200 |
DN250 |
DN300 |
|
Reducer power(kw) |
0.37 |
0.37 |
0.37 |
|
Backwash pump power(kw) |
1.1 |
1.5 |
1.5 |
|
Backwash flow rate(m³/day) |
14 |
18 |
20 |
|
Model |
ZGL-5000 |
ZGL-10000 |
ZGL-15000 |
|
Flow rate(m³/day) |
5000 |
10000 |
15000 |
|
Filter area(㎡) |
2.5 |
5 |
7.5 |
|
Outlet DN |
DN400 |
DN500 |
DN600 |
|
Reducer power(kw) |
0.75 |
0.75 |
0.75 |
|
Backwash pump power(kw) |
1.5 |
3 |
5.5 |
|
Backwash flow rate(m³/day) |
20 |
40 |
60 |
|
Model |
ZGL-20000 |
ZGL-25000 |
ZGL-30000 |
|
Flow rate(m³/day) |
20000 |
25000 |
30000 |
|
Filter area(㎡) |
10 |
12 |
15 |
|
Outlet DN |
DN700 |
DN800 |
DN800 |
|
Reducer power(kw) |
1.5 |
1.5 |
1.5 |
|
Backwash pump power(kw) |
7.5 |
11 |
11 |
|
Backwash flow rate(m³/day) |
80 |
100 |
100 |
Where it's used
Upgrading municipal effluent to a higher discharge standard, water reuse, and pretreatment of tap water. Industrial plants use it in metallurgy, chemicals, textiles, printing and dyeing, electroplating, pharmaceuticals and food processing, and for recovering suspended solids after solid-liquid separation.
Structure
Shell and screen. The shell, inlet pipe, drum, linkage gear, slewing bearing and seals are 304L stainless steel. The screen is 316L, made in independent mesh pieces, so you can remove and refit each one.
Drive. A motor and reducer turn the drum on roller support wheels. At the outlet end a gear drive replaces a chain.
Bearings. Oil-free bearings at the inlet use a solid lubricant that barely wears and replenishes itself, with water cooling. The outlet-side bearings are oiled from outside, so nobody enters the equipment room to lubricate them.
Drums. Both end drums are concentric, machined on a common axis and dynamically balanced several times to avoid deformation in long service.
Backwash. A backwash pump, flushing pipeline, nozzles (an external main nozzle with internal auxiliary ones, so it copes with extra chemical dosing or high SS), a collection tank and a discharge pipe.
Controls. Automatic and manual modes. The cabinet is IP65, with start and stop buttons, an auto/manual selector, an emergency stop, and start/stop and fault lights per machine. If the inlet level rises too high, the bypass valve opens automatically to protect the filter.
Drum filters are widely used in industries such as metallurgy, chemicals, textiles, printing and dyeing, electroplating, pharmaceuticals, and food processing. They are mainly used for:
Deep treatment and primary enhancement of municipal sewage.
Recycling and reuse of water resources.
Pre-treatment of tap water.
Recovery and utilization of suspended solids after solid-liquid separation.
FAQ
What does it remove?
Suspended solids and colloids, and the phosphorus and nitrogen bound to them. Not dissolved ammonia or nitrate.
What happens if the filter blocks?
The bypass valve opens when the inlet level rises, to protect the filter.
Can you customize it?
Yes. Tell us the material, electrical supply, flow and suspended solids.
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