coal bag filter dp
after checking & doing everything with respet to reduction of DP of my coal mill filter i am unable to reduce the DP.
with new bags it runs for 20-25 days only & than Dp touches 150mmwg & coal mill production reduces.
I have 6ksc dry air pressure, high purging frequency,no jamming,no pipes loose or worn out,periodic drain of moisture, low air to cloth ratioo (~ 1).
Before bag filter i have a collecting cyclone.
to increase air amount in the system i have shortened the dip tube by 300mm . now the dip tube is just 80-90mm below the inlet entry height.
when we replace some bags by new one we get a relief on temporary basis but agter some days the position is same.
Coal residue is 4 to 6 % on 72 mesh
we sre grinding petrocoke + indian coal (80+20% mix.)
we have close circuit ball mill of FLS
please do suggest.
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Re: coal bag filter dp
i agreed with opinions of Mr Vikpro and i have a advise for you that following:
- checking the water content in air compressor.
- change the new mesh size of 88 or 90 and reduce coal residue of 4 to 6% if possible.
- checking coal moisture feeded to the mill.
- checking and make a new setting for air pulse to rapping coal dust on the surface of sleeves.
- air pressure enough?