Waste Water Evaporator

From the main waste water storage tank, add water to the evaporator tank. The liquid level must be at least enough to cover the low level displacement “float” (fied in level indicator pipe). Do not overfill. If the filling is manual through gravity, one should check the level. If it is through pump in auto, it can be interlocked with your pump motor MCC. If foaming occurs adjust the fill level and/or use a defoamer. Foaming is oen mischaracterized as “boiling over”. For oily waste water, free floang oil can be removed through oil decanng pipe.Once water is filled, oil rises to top and forms layer and can be removed through decanng pipe. If the oil is emulsified(suspended homogenously in soluon) oil is removed by auto decanng (chain skimmer) Energise the system Exhaust blower is interlocked with mer and shall start automacally aer 55-60min ( inial heat-up me).Exhaust blower shall expediate the vapour removal. Once the batch is complete, remove the slurry/residues through the drain valve. The residue can be transferred to residue collecon tank through pump. Residue collecon tank is fied with specially designed external pad heaters to evaporate the balance water and the le out( sludge cake) is removed manually by scavenging. Residue can also be sun dried or dried by heat recovery from flue gas of the burner, in case of gas operated or diesel operated system. Condensate recovery is done using surface condenser. Cooling water from the cooling tower is circulated in the surface condenser and the condensate is collected in the seal pot. Further, condensate can be transferred to storage tank through pump

Condensate Recovery

While calculang the operang cost of waste water evaporator, water collected from condensate recovery should also be considered. This will give a clear idea about net opex. Condensate contains a significant amount of sensible heat that can account for about 10% to 30% of the inial heat energy contained in the steam. Feeding the boiler with high-temperature condensate can maximize boiler output because less heat energy is required to turn water into steam. When efficiently recovered and reused, it can even be possible to reduce boiler fuel needs by up to 10 to 20%. Reusing hot condensate can lead to considerable savings in terms of energy and water resources, as well as improve working condions and reduce your plant's carbon footprint. Use of the condensate As heated feedwater, by sending hot condensate back to the boiler's deaerator As pre-heat, for any applicable heang system As hot water, for cleaning equipment or other cleaning applicaon