Recovery Rates and The Impact of SaltsFlocon 260 Antiscalant is used to keep water hardness from precipitating during reverse osmosis treatment of water. The antiscalant also contains a dispersant which prevents iron or aluminum in water from reacting with the antiscalant and making it ineffective. Coagulant, on the other hand, works just the opposite. It is used to cause the suspended solids that may be present in water to coagulate and â€¦
firstname.lastname@example.org >Get A Quote >
PropertiesMembrane Scaling Prevention and removal. All reverse osmosis (RO) feed waters are different in ionic composition. As a result, different types of scale may deposit on the membranes if the correct antiscalant is not used. Selecting the right antiscalant and cleaning chemicals will optimise operating efficiency and help to prevent plant failure.
email@example.com >Get A Quote >
Sulfuric acid wonâ€™t work at all against SiO2. Iron scales are also common in boilers. They in theory could be cleaned with sulfuric acid but this is generally considered too aggressive. Passivated citric acid or in some cases reducing agents like bisulfite are typically used.
When acid is used with an A/S, the LSI value (of the reject stream) of 1.0 is acceptable (see Table 2.6) although some A/S manufacturers claim an LSI of 2.7 is acceptable when using their recommended product. 34 The A/S dosage ranges between 2 and 10 ppm, depending on the scale-forming potential of the RO feed water, product water recovery, and A/S manufacturer's recommendations. The main â€¦
03-08-2012· This article describes the details of a field trial in a two-pass seawater desalination plant during which sulphuric acid was phased out and replaced by a phosphonate- based antiscalant. The results show that the critical operating parameters remain stable, indicating the successful prevention of scale formation, throughout the trial period during which sulphuric acid was replaced by a â€¦
· PDF fileAntiscalants and Dispersants Acids: Acids, typically hydrochloric [HCl] or sulfuric [H2SO4], are injected into the RO feed to lower pH. Sulfuric acid is used more often than HCl acid. One reason for this is because sulfuric acid is relatively lower in operating cost than HCl acid. Another advantage to using sulfuric over HCl is the reduced fuming to the atmosphere, which means less corrosion to â€¦
21-05-2012· So it passes from a drying tower, usually with counter current sulfuric acid (96-98%). 2. Assuming a water tube boiler, an understanding of heat exchange in radiant and convection section can be found in "Petroleum Refinery Engineering" by W. L. Nelson, 4th edition, McGrawHill 1958, Chapter 18. But this is devoted to tubestill heaters (furnaces
If the water source contains oxygen, has been exposed to oxidizers, or ferric based coagulants have been used, the iron will be in the ferric state and can typically be controlled by dosing sulfuric acid to reduce the pH to ~6 and dosing antiscalant. If the water does not contain any dissolved oxygen, most of the iron will be in the Ferrous state.