Features of Filter Cloth
1.
Filter cloth is used for sludge dehydration in sewage treatment
factories. They have the characteristics of good water
permeability, air permeability and non-revealed sludge,
acid-resisting, alkali-resisting, heat resistance (180°C) .Because
of their designing structure, the sludge can be peeled off easily
after pigeonhole filter, so the screen are easily cleaned and have
a long working time. Therefore they are designed specially for
sludge dehydration.2.Filtration fabrics for belt filter presses are
characterized by high strength, resistance against abrasion and
high dimensional stability. Fabric construction secures good water
drainage and at the same time protects the sludge cake form going
through the fabric. Individual fabric designs differ in speed of
dewatering, size of apertures, surface smoothness for easy cake
release, resistance against abrasion, etc.3. Fabrics for belt
filter presses are equipped with stainless steel clipper seam and
belt edges are melted. There is also the possibility to connect the
fabric onto endless belt by using a woven seam, which is stronger
and has a higher lifetime than clipper seam.Application of Filter
Cloth
Dewatering of municipal sludge in
sewage plants Dewatering of paper sludge and pulp High
pressure dewatering of pulp Production of fruit and vegetable
juices Production of wine Dewatering of minerals in
mining industry Dewatering of sand Dewatering of sludge
in agriculture Other industrial separation processesTechnical
Parameter of Different Kinds of the Filter Cloth
PP Filter Cloth 750BMaterialPPThe
type750BTechnologySingle layerWeave
methodtwillNatureacid/alkali-resisting
Thickness0.88mmAir
perm35(L/m2·s)Unit weight450-460 (g/m2) Warp density268
(root/10cm)Weft density 157 (root/10cm)With or without the
filter materialWithout PP Filter Cloth 840-1(A)
(750A)MaterialPPThe typeMultifilamentTechnologyDouble layerWeave
methodPlainNaturealkali/heat/cold-resisting, water proof
Thickness0.88mmAir perm35(L/m2·s)Unit
weight471 (g/m2) ApplicationDustAir clear PP Filter
Cloth 840-3MaterialPPThe typeMultifilamentTechnologyDouble
layerWeave methodOne Plain/one TwillNature acid /alkali
/heat -resisting
Thickness1.36mmAir perm111.6(L/m2·s)Unit
weight500 (g/m2) ApplicationCoal dressingAir clearWarp
density333 (root/10cm)Weft density 204
(root/10cm)ApplicationDustAir clear PP Filter Cloth
700ABMaterialPPThe type700ABTechnologyDouble layerWeave
method PlainNature acid /alkali
/cold -resisting
ApplicationSludgeApplicationWater processingfilter PP
Filter Cloth 700AMaterialPPThe type700ATechnology**Weave
methodPlainNature acid /alkali -resisting
Thickness0.7mmAir
perm11.79(L/m2-s)Unit weight350(g/m2)Warp density204
(root/10cm)Weft density 106 (root/10cm) Filter
Cloth 120-7MaterialPEThe type120-7TechnologySigel
layerWeaveTwillNature acid /alkali /heat/cold -resisting
Thickness
1.42mmAir perm54(L/m2·s)Unit
weight610(g/m2) Filter Cloth 822MaterialPEThe
type120-7Technology
Sigel double layerWeave
Plain,TwillNature acid /alkali
/heat/cold -resisting
Thickness
0.5mmAir perm100(L/m2·s)Unit
weight600(g/m2)Warp density30 (root/10cm)Weft
density 27 (root/10cm) Filter Cloth
621MaterialPEThe typeMultifilamentTechnologySigel
layerWeavePlainThickness 0.63mmAir perm11.34(L/m2·s)Unit
weight390(g/m2)Warp density188 (root/10cm)Weft density 137
(root/10cm)Filter Cloth installed on the Plate of Filter
Press
Can we clean the cloths
with a pressure sprayer?
You can, but take
care to not get too close with the spray tip. Only use the sprayer
in a "fan" spray pattern and keep spray pressure under 1000 PSI.Can
we clean cloths with chemical cleaners?
Polypropylene filter cloths can handle
both caustic and acidic solutions. Nylon, polyester, and felt
cloths need special consideration and may be damaged from these
chemicals. Contact M.W. Watermark about your specific
situation.How can we extend our cloth life?
1) Filter cloth life is shortened by
chemicals, mechanical wear, abrasion, and blinding. We can help to
determine whether your cloths are being attacked by your process
chemicals. Mechanical wear can be reduced by using a more durable
cloth. Blinding often comes from "slamming" sludge into the
press.2) Consider an Auto Feed Pump Control System, or an AFPCS to
automatically and gradually increase pressures. "Pre-coating" a
press with DE or similar products can also add
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