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Why is phosphate dosing done in a boiler? - Quora
Phosphate is doing interesting job in Boiler. It works as an anti-scalant since phosphate react with calcium hardness to create suspended solids (which is easier to discharge via blowdown) in order to prevent any calcium carbonate (CaCO3) /calcium
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Standard Specification For Boiler Compound And Water
2018-7-12 · a uniform mixture of sodium lignosulfo-nate, sodium sulfite and anti-foam for use as a boiler water additive to control scale formation and to prevent steam contamination. the blend shall be suitable for use in the generation of steam for the processing of food, readily soluble in water, contain less than 0.5% insoluble matter
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Trisodium Phosphate - an overview | ScienceDirect …
The following are the reactions of sodium phosphate in water. 3 g l-1 sodium silicate (bleaching stabilizer) From 1857 to 1900 numerous patents described the use of tannins and other materials for treating boiler water. The use of disodium phosphate and trisodium phosphate came during this time period. Still, boiler explosions killed
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Using of congruent phosphate as equilibrium phosphate
2014-5-15 · The relation between pH of boiler water and phosphate residue concentration is shown in fig. 2. This curve is very close to the typical tri-sodium phosphate concentration in fig. 1. The low pH values of boiler water compared to phosphate residue concentration can be attributed to two factors, first, di-sodium phosphate formed
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Trisodium phosphate | Na3PO4 - PubChem
Two-year toxicology and carcinogenesis studies of chlorinated trisodium phosphate, an inclusion complex of trisodium phosphate and sodium hypochlorite used in various cleaning compounds, were conducted by administering 0,500, or 1,000 mg/kg (dose volume: 10 mL/kg) of the chemical in water by gavage, 5 days per week for 103 weeks, to groups of
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Water Handbook - Preboiler & Industrial Boiler …
2020-3-29 · In high-purity systems, raw water in-leakage (e.g., condenser leakage) lowers boiler water pH when magnesium hydroxide precipitates, resulting in corrosion, formation of atomic hydrogen, and initiation of hydrogen attack. Coordinated phosphate/pH control can be used to minimize the decrease in boiler water pH that results from condenser leakage.
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Using of congruent phosphate as equilibrium …
Using of congruent phosphate as equilibrium phosphate boilers water treatment Conductivity and pH of boiler water when using tri-sodium phosphate. Magnesium, sodium, carbonate and silicate
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sodium phosphate in treated boiler water - WHGLA
Program determines sodium-to-phosphate ratio in boiler water . This paper discusses sodium phosphate compounds, notably trisodium and disodium phosphate which have been used for years at many fossil-fired power plants for boiler water treatment. The principal purpose is to buffer the boiler water at a suitable pH while adding a compound, PO{sub
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Boiler water treatment - Lenntech
Boiler feed water; Boiler water treatment; phosphate or silicate. Magnesium sulphate is reacted upon by caustic soda to form a precipitate of magnesium hydroxide. Some magnesium may react with silica to form magnesium silicate. Sodium sulphate is highly soluble and remains in solution unless the water is evaporated almost to dryness.
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Steam Generation Chemistry: Correcting Outdated …
It has been known for quite some time that these blended phosphates can precipitate at much lower sodium-to-phosphate ratios than even 2.3:1, which can then cause direct acid phosphate corrosion
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