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Pressure Filter
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shubham Inc
Dec 14, 2010, 4:12:50 AM12/14/10
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Pressure filter is highly recommended for the removal of suspended
solids & undissolved impurities like dust particles & heavy metals
etc. doing so it reduces turbidity.
Sand filter - Sand filters are used for water purification. There are
three main types; rapid (gravity) sand filters upflow sand filters
slow sand filter s All three methods are used extensively in the
water
industry throughout the world.
If the pressure in the filter drops then this indicates that the
filter is not getting sufficient pool water through the circulation
system. This could be due to blocked skimmers and sumps inside the
pool, restricted suction pipes in the balance tank, or the suction
pipes from the pool are blocked off or restricted.
pressure sand filter consists of a pressure vessel-this could be
either vertical or horizontal-fitted with a set of frontal pipe work
and valves, graded silica quartz sand supported by layers of graded
under bed consisting of pebbles and gravels, a top distributor to
distribute the incoming water uniformly throughout the cross section
of the filter, and an under drain system to collect filtered water.
Sand dunes are not only made of sand but also of water. You don't
have
to dig very far to see the moisture in the sand. One of the unique
features of sand is that it helps filter water that passes through
it.
Go out to the sand and have the students dig into the sand and
describe what they find. Talk about why they think it is cool and
wet.
Ask the students where they think the water came from and where they
think it goes. Doing Castles in the Sand prior to this activity helps
students understand how sand and water work together through a
process
called capillary action.
Raw water flows down wards through the filter bed and as the
suspended
matter- which has usually been treated by addition of a coagulant
like
alum- is retained on the sand surface and between the sand grains
immediately below the surface. There is steady rise in the loss of
head as the filter process continues and the flow reduces once the
Pressure sand filter drop across the filter is excessive.
solids & undissolved impurities like dust particles & heavy metals
etc. doing so it reduces turbidity.
Sand filter - Sand filters are used for water purification. There are
three main types; rapid (gravity) sand filters upflow sand filters
slow sand filter s All three methods are used extensively in the
water
industry throughout the world.
If the pressure in the filter drops then this indicates that the
filter is not getting sufficient pool water through the circulation
system. This could be due to blocked skimmers and sumps inside the
pool, restricted suction pipes in the balance tank, or the suction
pipes from the pool are blocked off or restricted.
pressure sand filter consists of a pressure vessel-this could be
either vertical or horizontal-fitted with a set of frontal pipe work
and valves, graded silica quartz sand supported by layers of graded
under bed consisting of pebbles and gravels, a top distributor to
distribute the incoming water uniformly throughout the cross section
of the filter, and an under drain system to collect filtered water.
Sand dunes are not only made of sand but also of water. You don't
have
to dig very far to see the moisture in the sand. One of the unique
features of sand is that it helps filter water that passes through
it.
Go out to the sand and have the students dig into the sand and
describe what they find. Talk about why they think it is cool and
wet.
Ask the students where they think the water came from and where they
think it goes. Doing Castles in the Sand prior to this activity helps
students understand how sand and water work together through a
process
called capillary action.
Raw water flows down wards through the filter bed and as the
suspended
matter- which has usually been treated by addition of a coagulant
like
alum- is retained on the sand surface and between the sand grains
immediately below the surface. There is steady rise in the loss of
head as the filter process continues and the flow reduces once the
Pressure sand filter drop across the filter is excessive.
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