erythorbic acid in high pressure boiler Agent

erythorbic acid in high pressure boiler Agent

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high boiler reliability is one of the main passivating agent at all temperatures, fol-lowed by erythorbic acid and then hydrazine. Reduction of feedwater iron and copper concentrations by carbohy-drazide has been confirmed in actual boiler systems. Reduce Feedwater to the Boiler

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Oxygen scavenger chemicals for boiler feed water by

Feb 03, 2018 · Boiler Oxygen Scavenger is a catalyzed oxygen scavenger in liquid form based on catalyzed sodium bisulfite. common in high pressure systems Sodium Erythorbate Erythorbic acid …

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Method of retarding corrosion of metal surfaces in contact

The invention is intended for use in all boiler systems, but is particularly useful in high pressure boiler water systems, for example, those systems operating at a temperature above 250° F., and up to and sometime exceeding 600° F., and at pressures in the range of from about 50 to about 2000 PSIG, or above. The Oxygen Problem

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Water Treatment Products | Summit Laboratories

Thus, in high pressure and supercritical boilers, … Erythorbic acid is non-volatile. It will remain in the boiler, … Dissolved Oxygen and Corrosion – Corrosion science and … Dissolved Oxygen and Corrosion. … decrease in relative pressure. In modern boiler … under typical boiler conditions. Erythorbic acid …

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Sulfites for Oxygen Control - Scranton Associates

Nov 01, 2018 · May (1989) stated that erythorbic acid (d-isoascorbic acid) could scavenge oxygen rapidly at high temperatures and pressures (boiler conditions). Furthermore, ascorbic acid ( l -ascorbic acid) has also been investigated and recommended as an antioxidant in food industries due to its rapid reaction with oxygen ( Christensen and Steimel, 1990 ; Kramarenko et al., 2006 ).

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Organic Impurities and Organic Conditioning Agents in the

erythorbic acid, oxalic acid, acetic acid, formic acid and finally carbon dioxide; pressure boilers. Traditional dispersants are tannins, lignins and other natural organic derivates. Heat stable the conditioning agent, a high concentration of anionic

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Organic Impurities and Organic Conditioning Agents in the

erythorbic acid, oxalic acid, acetic acid, formic acid and finally carbon dioxide; pressure boilers. Traditional dispersants are tannins, lignins and other natural organic derivates. Heat stable the conditioning agent, a high concentration of anionic

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Water and Steam chemistry-Deposits and Corrosion-

May 25, 2016 · Traditional oxygen scavengers have been sodium sulfite for low pressure boilers and hydrazine for high pressure boilers. Sulfite must not be used where the boiler pressure is greater than 900 psig (6.2 MPa). Other oxygen scavengers (erythorbic acid, diethylhydroxylamine, hydroquinone and carbohydrazide) are also used.

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Feed Water Treatment to Avoid Corrosion - Engineering ToolBox

Make-up water to steam boilers should be treated with oxygen scavengers to avoid serious corrosion problems. Corrosion is a major problem in steam systems with high consumption of make-up water. Fresh water contains dissolved oxygen. Oxygen together with high temperature is highly corrosive for the carbon steel piping used in steam systems.

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Water Treatment for the Pharmaceutical Industry Part 3

Feb 10, 2021 · Water Treatment for the Pharmaceutical Industry Part 3: Boiler Condensate/Feedwater. Posted by ChemTreat On 02/10/2021. Steam is widely utilized in the pharmaceutical industry for many heat transfer and sterilization processes. Rigorous control of steam generation chemistry is also necessary to prevent corrosion and fouling of equipment that could otherwise cause failures and …

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Dissolved oxygen corrosion

Erythorbic acid and its sodium salt are replacing sulfite and hydrazine as oxygen scavengers in boiler water treatment. Based upon the stoichiometric relationship, it should take about 13 parts of sodium erythorbate to react with one part of dissolved oxygen.

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Boiler Water Treatment - Home - Association of Water

pressure over the pump. At 1 psi of head for every 2.3 feet of height, 30 feet ≈ 13 psi of head pressure. • In a system with a feed water tank instead of a DA, maintain the temperature below 200ºF The slip stream system uses a side stream to recirculate feed water back to the suction side of the pump,alleviating steam release (cavitation

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7.0 Chemical Treatment - Steam Turbine, Steam Boiler

diluted and as alkalinity increases in the boiler. This allows any free erythorbate present to catalyze the sulfite/oxygen reaction and validates it as a safe, non-metallic agent of catalysis. The usual catalyst for sulfite had been cobalt sulfite or cobalt chloride at levels of less than 0.1% (as Co).

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BOILER WATER TREATMENT CHEMICALS AND ITS COMPOSITION

Apr 29, 2020 · Erythorbic Acid (Sur-gard) R 1 -C (OH) An effective oxygen scavenger and metal passivator. It is the only non-volatile scavenger which can be used with spray attemperation. does not add measureable solids to the boiler water. May be used in boilers up to 122 bar. Officially recognised as a Safe Substance.

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Table 3-20. Treatment Guidelines for Very-High-Pressure Steam

Start-up of New Boilers and Condensate Systems or Repaired Boilers Table 3-20. Treatment Guidelines for Very-High-Pressure Steam. Parameter. Boiler Water Treatment Control. COC. Maximum of 100, per ASME Pitting corrosion control. hydroquinone, carbohydrazide, hydrazine. sulfate, tannin derivatives, or erythorbic acid. Maintain pH of 7.5

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Sulfites for Oxygen Control - Scranton Associates-Flip

Oct 03, 2016 · Low Pressure Boilers (<250 psi) 0.030 High Pressure Boilers 0.005 fastest of all of the scavengers, followed by erythorbic acid and DEHA. Slower rates, in general, have been reported for hydroquinone, carbohydrazide, and hydrazine. non-metallic agent of catalysis.

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Oxygen scavenger for boiler water and method of use

Sodium sulfite provides efficient scavenging in medium and low pressure boilers with no harmful by-products. Its use, however, is precluded in boilers operating at or above 1800 psig where the high pressures cause the formation of SO 2 and H 2 S by thermal decomposition of the chemical.

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Carbohydrazide vs Hydrazine: A Comparative Study

reducing agent (usually hydrazine or one of the acceptable (DEHA), hydroxyquinone and erythorbic acid [3–7]. (SWCC) in high-pressure boilers as an effective oxygen scavenger for the last

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CA1168950A - Ascorbic acid and stereoisomers as oxygen

Glycol – Ethylene & Propylene. Organic oxygen scavengers for high pressure boilers: – carbohydrazide. – erythorbic acid / iso ascorbic acid. – DEHA. Antifoams / defoams. Loop cleaning and new system cleaners. Boil-out chemicals for boiler startup and initial cleaning. Potable corrosion inhibitors.

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Sulfites for Oxygen Control - Scranton Associates-Flip

Oct 03, 2016 · Low Pressure Boilers (<250 psi) 0.030 High Pressure Boilers 0.005 fastest of all of the scavengers, followed by erythorbic acid and DEHA. Slower rates, in general, have been reported for hydroquinone, carbohydrazide, and hydrazine. non-metallic agent of catalysis.

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