Acid water neutralization system
water, resulting from processes using acid washing (for example processes
on glass objects), can be treated with a manual or automatic neutralization
cycle, until the requested outlet level is reached. Usually,
acid water is stocked in two out-of-ground tanks for accumulation and
equalization. A pump draws from a tank and delivers in the other one in
order to keep the waste water shacked and equalized.
|Automated chemical-phisical neutralization system|
the reaction tank a suspension of hydrated lime is proportioned by a suitable
pump, under the control of a pH-meter, while a slow stirring device mixes
the reagents with the waste water.
When the maximum level of the reaction tank is reached, a level probe disconnects the inlet pump and connects the outlet one, which sends the flood water to the flocculation tank. A slow stirring device undergoes a mixing action, which helps the flocking. These flocks will constitute the resulting mud.
The flood water decants within the decanter, where the mud sediments on the conical bottom, while clarified water emerges on surface.
Decanted mud are sent to a filter-press. Water resulting from the filter-press process is sent back to the system inlet, since it is still laden with sedimentable solids.
The exhaust of the decanted elements is recovered and pumped to a rapid filter with quartzite bed, where possible sedimentable solids, escaped from decantation, are held back.
After the quartzite filter, water reaches the neutralization tank, where solution neutrality is restored by dosage of sulfuric acid, under control of a pH-meter.
After the neutralization process, water can be sent to the exhaust.
An electrical box includes all the controls as well as the digital-electronic instrumentation for the equipment correct running,.
|Rapid filters with quartzite bed|
Fibbi Elio s.r.l.
Via Pietro Nenni, 12 SIECI - PONTASSIEVE Firenze, Italy tel. 0039+55+8309215 Fax 0039+55+8309749