erythorbic acid in high pressure boiler

erythorbic acid in high pressure boiler

Table 3-3. Levels of Sulfite to be Carried in Boiler Water

Levels of Sulfite to be Carried in Boiler Water. Figure 3-12. Mechanical Deaerator Schematic (Tray Type) carbohydrazide, hydrazine sulfate, and erythorbic acid. Hydrazine can no longer be. specialty volatile. treatments not only scavenge oxygen but also passivate metal surfaces. These. chemicals are normally maintained in the boiler

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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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DRAFT BOILER/FEEDWATER GUIDELINES

pitting can result with possible rupture of boiler condensate piping or boiler tubes. 3.3.4 Rusty water in the boiler gage glass is a sure sign of acid corrosion in the boiler feedwater/condesate system or in the boiler itself. 3.3.5 Make-up water is the major source of carbon dioxide. The first priority is to minimize the amount of make-up water.

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Acid cleaning operation for a natural circulation high

Acid cleaning operation for a natural circulation high pressure drum boiler unit of a thermal power station M Azad Sohail*3 & A Ismail Mustafab "Central Chemical Research Laboratory, Gh01·sal Thermal Power Station, BPDB, Narsingdi, Bangladesh bDepartment of Applied Chemistry and Chemical Technology. University of Dhaka, Dhaka-! 000, Bangladesh

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Steam Purity - Western Regional Boiler Association Home

Excellent steam purity is essential for a turbine operation It is essential to monitor the steam purity of the steam going to a high pressure turbine. This includes: 1) Monitoring the steam purity of the silica, sodium and cation conductivity where possible 2)Maintaining very good control of the boiler chemistry

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US Patent for Method of scavenging dissolved oxygen in

In this example, a 25 percent solution of erythorbic acid adjusted to pH 6.+-.0.5 with ammonium hydroxide was compared to the hydrazine as an oxygen scavenger in an electric utility boiler operating at more than 1500 psig.

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Boiler Chemistry Management Using Coordinated Approach of

versal, or any combination of these treatments. In high purity boiler feedwater, iron oxides are the main contaminants. The iron is introduced into the system from preboiler heaters and the condensate system. Because most highpressure steam generators have high heat fluxes and use coordinated forming carbonic acid that hydrolyzes

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Performance of erythorbic acid as an oxygen scavenger in

The performance of the erythorbic acid oxygen scavenger was significantly affected by the thermal aging of MEG (when compared to fresh MEG) as shown by Fig. 4. For both the high and low dosage rates of erythorbic acid, it was observed that TAL-MEG reduced the oxygen removal rate.

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Instructor Water Treatment - dhpseminars.com

Erythorbic Acid Internal Boiler Water Treatment Internal Boiler Water Treatment The higher the pressure of the boiler, the higher the quality requirement for the boiler water You can always treat a lower pressure boiler with the treatment recommendations for higher pressure boilers You can never treat a higher pressure boiler with

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Water Handbook - Preboiler & Industrial Boiler Corrosion

Maintenance of proper pH throughout the boiler feedwater, boiler, and condensate systems is essential for corrosion control. Most low-pressure boiler system operators monitor boiler water alkalinity because it correlates very closely with pH, while most feedwater, condensate, and high-pressure boiler water requires direct monitoring of pH.

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erythorbic acid in high pressure boiler best boiler for sale

Due to the introduction of high pressure boilers, SULFITE DEHA ERYTHORBIC ACID 7.0 Chemical Treatment Steam Turbine, Steam Boiler In discussing chemical treatment in boiler in the steam lines or in the boiler, to control carbonic acid Passivation can be accomplished in high pressure DSS Boiler Water Treatment

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708. Erythorbic acid and its sodium salt (WHO Food

Although erythorbic acid was found in high levels in the plasma, it did not cause a reduction in plasma ascorbic acid concentration. The body weight gain in both the erythorbic acid and ascorbic acid groups was reduced by 40% relative to mice receiving control diet (Tsao & Salimi, 1983).

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Oxidation And Degradation Products Of Common Oxygen Scavengers

Oxidation And Degradation Products Of Common Oxygen Scavengers By John D. Zupanovich, ChemTreat, Inc. In the high temperature/pressure and alkaline atmosphere of the boiler, sodium sulfite When sodium hydroxide is present in the boiler water, the acetic acid produced is trapped

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Oxygen Scavengers - SUBSPORT

Oxygen Scavengers Corrosion by oxygen in the boiler can be controlled by the Thus, in high pressure and supercritical boilers, where any solids constitute a severe problem, sulfite cannot be used. Erythorbic acid is non-volatile. It will remain in the boiler, and will not travel with the stream

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S. P. THERMAL SYSTEMS INC.

S.P. Thermal Systems Inc or its agents will not be responsible to repair or fix leaks associated from the acid cleaning of the boiler or any equipment being cleaned. It will be the owner of the equipment responsibility to arrange to have all repairs fixed, and pay for these

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Organic acid formation in steamwater cycles: Influence of

The high heating rate is therefore a plausible explanation for the relatively high acetate concentrations measured in the case-study. Acetate is more stable at the high temperatures than other organic acid anions found in high pressure steamwater cycles.

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7.0 Chemical Treatment - steamforum.com

As a general rule, the higher the boiler pressure, the higher the quality of feedwater required. Therefore, the higher the pressure, the more chemical treatment is concentrated outside the boiler in water preparation (chapter 2), and the less internal boiler water treatment and condensate treatment is required.

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Treatment Guidelines for Medium- and High-Pressure Steam

Treatment Guidelines for Medium-and High-Pressure Steam. [16 to 299 pounds per square inch. gauge]) and high-pressure (2068 to 6205 kilopascals [300 to 900 pounds per square. inch gauge]) boilers is similar and is described in Table 3-19. Treatment can include. sometimes use erythorbic acid or specialty volatile oxygen scavengers or

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Boiler Chemical Cleaning: Doing It Correctly - powermag.com

Since the purge water is designed to provide water to the pump during normal operation, the system is set up to overcome normal boiler pressure. These high-pressure pumps can produce high purge

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National Power Training Institute STUDY MATERIAL (BOILER

Boiler Feed Pump The boiler feed pump is used to supply high-pressure boiler feedwater to the drum. Boiler feed pumps operates in a constant speed or variable speed manner. A variable speed motor, a magnetic or hydraulic coupling, or a steam turbine can drive a variable speed pump's speed. such as erythorbic acid and diethyl hydroxylamine

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