Antifoam Defoamer M8 for Seawater Distillation in UAE
DUBI CHEM is one of the leading manufacturers and suppliers of all kinds of Antifoam Defoamers for Seawater Distilations, Glycol dehydration systems, Waste Water Treatment plants, etc. One of the most efficient and popular ANTIFOAM DEFOAMERS is RXSOL Antifoam Defoamer M8 which is extensively used in seawater distillation plants. Its highly concentrated formulation makes it cost efficient and enables quick knockdown of foam in distillation plants.
M8 antifoam is a highly effective liquid product formulated to control foaming and priming in seawater distillation plants.
ANTIFOAM DEFOAMER M8 has proven effectiveness during many years of use in distillation plants throughout the world.
Low dose level, typically in the range 0.05 to 0.1 mg/l in the seawater feed stream, depending on feed water quality.
Activity is not dependent on temperature. No need to alter dose level if top brine temperature (TBT) changes.
Negligible steam volatility and carry over into the distillate.
RXSOL ANTIFOAM DEFOAMER M8 is readily broken down by oxidising agents and typically has a COD value of 2.36 g O₂/g
The foaming tendency of seawater in distillation plants is unpredictable. It is generally thought that foam is formed when organic compounds are concentrated in the brine, giving rise to surface active effects which increase the liquid film strength at phase interfaces.
Belite M8 is not soluble in water. At use concentrations (0.05–0.1 mg/l), Belite M8 forms a micro-emulsion and during evaporation is incorporated into the surface liquid film of bubbles where it acts as a surfactant and reduces the film strength.
The result is that the film readily ruptures and a stable foam does not form. In this way a uniform boiling or flashing action is achieved and carry-over is minimised.
RXSOL M8 can be used to control foaming in all types of seawater distillation plant and is particularly stable for use in multi-stage flash plants. Belite M8 is a formulated product containing ethylene oxide/propylene oxide block copolymer.
As such it is not soluble in water but readily forms a stable emulsion at concentrations up to 1% w/w in distillate.
RXSOL ANTIFOAM DEFOAMER M8 is typically dosed as a 1% w/w emulsion in distillate prepared as follows:
a) Add 50% to 70% of required distillate volume into dosing tank.
b) Start the dosing tank agitator/mixer.
c) Add the required Belite M8 volume into the dosing tank.
d) Add the remaining volume of distillate to give the required concentration of Belite M8 solution.
e) Continue agitation for a further 10 - 15 minutes.
f) The resulting emulsion will be stable and will not normally separate.
The dose level required will depend on the quality of the seawater feed (e.g. dissolved organics, suspended solids), but is typically found to be in the range 0.05 - 0.1 mg/l and is subject to optimisation as operating experience is gained.
Dose level is not dependent on operating temperature of the distillation plant.
Recommended injection points are either into the seawater make-up line after any external de-aeration and decarbonation equipment, or into the recycle brine stream at a suitable point after the blowdown and typically into the discharge of the recycle brine pump.
Comparision of RXSOL ANTIFOAM M8 with RXSOL Antifoam Defoamer (Silicon Based)
| Antifoam AF10 (RXSOL-51-2066) | Antifoam Defoamer (Silicon based) |
|---|---|
| Rapid dispersion | Moderate |
| Lower fouling tendency | Higher fouling risk |
| Easier dilution | Difficult |
| Better seawater compatibility | Good |
| Lower deposit formation | Moderate |
| Suitable for continuous dosing | Excellent |
Due to high organic matter in systems, or many other reasons, there can be excessive foaming. To control foaming in such circumstances, it is advisable to use RXSOL Antifoam Defoamer Elite M8 in the systems.
Send us an email inquiry to know more about RXSOL ANTIFOAM DEFOAMER M8. Get a direct factory discounted offer immediately along with all the technical data sheets.
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