Area Of Application
-
Sludge dewatering in domestic
sewage treatment plant and industrial wastewater treatment
plant
Features
-
Automatic operation with timer
control.
-
Suitable for all types of
sludge irrespective of whether the sludge is organic and
inorganic in nature
-
Patented rotary thickener to
concentrate the incoming conditioned slurry by removing
the excessive water.
-
Equipped with built-in
automatic tension adjustment system and alignment setting
system.
-
Self-cleansing mechanism with
water spray to maintain the belt clean.
-
Low polymer consumption.
-
Stainless steel structure and
rollers.
-
Low power requirement.
-
Equipped with emergency stop
device and safety alarm system.
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Process
Description
SLUDGE
THICKENER. Normally the sludge is further
concentrated by the gravity thickener to about 3%
solid content before it is pumped to the belt press
for dewatering.
SLUDGE
CONDITIONING. Polymer is injected into the
thickened sludge so as to make larger flock of
sludge. The type of polymer to be used depends on
the nature of the sludge.
ROTARY
THICKENER. The conditioned sludge is first fed
to the rotary thickener of the belt press. The
purpose of the rotary thickener is to remove the
excessive water quickly so as to further thicken the
sludge.
GRAVITY
DEWATERING. When the thickened sludge left the
rotary thickener, it will reach the first part of
the roller, which allowed a further dewatering by
gravity.
ROLLER
PRESSES. The sludge is then allowed to go
through a series of a rollers which will pressed the
remaining free water from the sludge. In this zone,
the sludge is allowed to build up to a certain
thickness before it enter the multi station S type
pressure roller. The sludge is subjected to high
shear pressure to form the cake.
SLUDGE CAKE.
The dewatered sludge normally has a water content of
between 70 – 80%, depending on the types and nature
of sludge.
Dewatering Performance
|
TYPE OF SLUDGE |
SOLID CONTENT OF SLUDGE
% |
POLYMER FOR DEWATERING
% |
THROUGHPUT |
WATER CONTENT OF CAKE
% |
|
PAPER MILL SLUDGE |
2.0 – 4.0 |
0.3 – 0.5 |
4.0 – 6.5 |
65 – 75 |
|
DRYING SLUDGE |
1.5 – 2.5 |
0.2 – 0.6 |
3.3 – 5.8 |
75 – 83 |
|
GILDING SLUDGE |
1.5 – 2.5 |
0.2 – 0.6 |
3.4 – 5.8 |
70 – 80 |
|
LEATHER SLUDGE |
2.5 – 4.0 |
0.3 – 0.9 |
3.8 – 6.2 |
70 – 82 |
|
METAL SLUDGE |
2.5 – 3.5 |
0.3 – 0.8 |
3.4 – 5.8 |
72 – 80 |
|
SEONE SLUDGE |
6.0 – 20.0 |
0.2 – 0.3 |
3.0 – 5.0 |
40 – 70 |
|
CITY MIXED RAW SLUDGE |
2.0 – 5.8 |
0.3 – 0.8 |
3.8 – 7.0 |
64 – 77 |
|
CITY EXCESS ACTIVATED SLUDGE |
1.0 – 3.1 |
0.5 – 1.0 |
2.0 – 5.0 |
76 – 82 |
|
SEWAGE DIGESTED SLUDGE |
3.0 – 6.1 |
0.3 – 0.6 |
5.0 – 8.0 |
65 – 78 |
|
SEWAGE EXCESS ACTIVATED SLUDGE |
1.0 – 3.5 |
0.5 – 1.0 |
2.5 – 3.6 |
75 – 83 |
Selection Chart
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Selection Chart
Process Flow Chart
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Selection Chart
Belt Press Parts
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