FILTER PRESS Suggestions by am Fluid Control Dec 10

8/8/2019 FILTER PRESS Suggestions by am Fluid Control Dec 10

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FILTER PRESS

K.S.SUBRAMANIAN



SPECIFICATIONS

No of plates : 60 + 2 end

plates

Plate size : 1500 X 1500m

Thick plate : 65 mm

Cake thick : 40 mm

Type : Recessed

Deliver y : Closed

filtration area: 233.63 Sq.M

Cake volume: 4800 lts of water equivalent



DETAILS

Filter press is fed by a centrifugal pump (sludge) ± Capacity : 10 Cu.m/Hr

± Head : 100 mts water column

± Impeller : 272 mm dia & MOC ± SS 304

± Motor : KE C 15 KW ( 20 Hp)

± RPM : 2920



FILTRATION OPERATION OBSERVATIONS

Cycle time : 26 Hrs

± Initial setting : 2 Hrs

± Filtration : 20 Hrs

± Air compression : 1 Hr

± Discharge & cleaning : 3 Hrs

Closing pr. of filter press : 250 bar

Filtration operation Pr : 6 Kg/cm2

Air squeezing operation Pr : 7 Kg/cm2

Quantity filtered : 100000 lts

Quantity of cake collected : 4800 Kgs Moisture content in cake : 60 - 70%



HYDRAULIC OPERATIONS

Closing operation

± Initial tightening of the front plates and final tightening of

the end plates



HYDRAULIC OPERATIONS

Opening operation

± Initial loosening of the end plates and final loosening of

the front plates



DIFFICULTIES FACED B Y SSPL

Opening and closing of the filter press using the automatic system

Leakage of filtrate due to non achievement of closing pressure

Heavy leakage from the gland of feed centrifugal pump

Non achievement of required pressure development of 6 Kg/cm2 in

filter press

Difficulty in getting a consolidated cake

Washing of filter cloth

Setting of cloth in line with the holes (due to elongation)

Making the entire place messy due to faulty operations



SUGGESTIONS GIVEN B Y FLUID CONTROL

Opening and closing of the filter press using the automatic system

± Usage of right type of recommended hydraulic oil is to be used to the

required level

± If an y air lock gets into the system the cylinders does not function.

Hence the same is to be checked periodically

Leakage of filtrate due to non achievement of closing pressure

± If t he cylinders start functioning properly, full closing pressure of 250

kg/cm2 will be achieved & will arrest any leakage between the plates

± Check for any folding of filter cloth & if found any to be corrected while

stacking the plates

± Check for any cake deposition on the surface of the plates, if found to

be cleaned thoroughly




Heavy leakage from the gland of f eed centrifugal pump

± High volume & high power centrifugal pump tend to leak at high pressures of 6 Kg/cm2

± Use t he centrifugal pump only for initial filtration up to 1.5 Kg/cm2.

During this period only 50 % of the pump deliver y is to be fed into the

filter press & remaining is to be re-circulated back into the sludge tank.

± subsequently use the screw pump to achieve the pressure up to 4.5Kg/cm2.

± by which power saving & consistency in cake deposition will be

achieved

Non achievement of r equir ed pr essur e development of 6 Kg/cm2 in

filter pr ess ± To fill the cake only up to the pressure of 4.5 Kg/cm2 using the screw

pump

± Go for compressed air squeezing up to 7 Kg/cm2 for effective cake

removal & dr y cleaning




Difficulty in getting a consolidated cake

± By following the earlier step consolidated cake can be ensured

Washing of filter cloth

± Once consolidated dr y cake gets formed, washing of filter cloth

becomes minimal




Setting of cloth in line with the holes (due to elongation)

Existing : Closed deliver y with

Central inlet & 4 outlet holes

Proposed : Open deliver y with

Central inlet & 2 bottom corner

outlet holes with taps



OPEN CUM CLOSE DELIVER Y

OPERATION




Proposed : Open deliver y with

Central inlet & 2 bottom corner outlet holes with taps & A

collection gutter with gravity

outlet

Drill holes with the dia ¾ inch bsp

ADV ANT AGES:

No need to have corner holes

in the top & bottom of the cloth

This helps easy setting of the

filter cloth

Dripping comes down

drastically due to full sealing &

gasketting action

House keeping becomes

easier with less of leakage &dripping



FOR FURTHER DETAILS

K.S.SUBRAMANIAN

± 09381041462

[email protected] [email protected]

www.flu-con.com

FILTER PRESS Suggestions by am Fluid Control Dec 10

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