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Water Handbook -Boiler Deposits: Occurrence And Control | SUEZ

An increased number of mud drum "blows" should be performed to remove the particles from the boiler. In-service chelant cleanup programs are not advisable when deposit analyses reveal that major constituents are composed of silicates, iron oxide, or any scale that appears to be hard, tightly bound, or lacking in porosity.

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Prevention of corrosion in steam boiler systems

(c) Ensuring correct PH value and salinity in side a boiler. (d) Slow initial steam raising process, which is generally accelerated for timely steam requirements. (e) Preservation of boiler Not in use is the most important and often neglected part.

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Boiler Drum Level Transmitter Calibration - Instrumentation Tools

Boiler Drum Level Transmitter Calibration X Interface Level Measurement using DP Transmitter Level Measurement Differential pressure (DP) transmitters are used to measure the interface of two fluids that have different specific gravities (S1 & S2).

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Corrosion in boilers - Lenntech

It is necessary to consider the quantity of the various harmful substances that can be allowed in the boiler water without risk of damage to the boiler. Corrosion may occur in the feed-water system as a result of low pH water and the presence of dissolved oxygen and carbon dioxide.

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Boiler Drum Level Transmitter Calibration - Instrumentation Tools

The formulas used to calculate boiler drum level transmitter are: At Hmin, The Transmitter output will be 4ma Pmin or 4ma = [H(Ds-Do)+Hmin(Dw-Ds)] Do. At Hmax, The Transmitter output will be 20ma Pmax or 20ma = [H(Ds-Do)+Hmax(Dw-Ds)] Do. Where, P0 = Static pressure in the steam drum at the top tap. Ds= Density of saturated steam at operating conditions

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Boiler water Limit:- - Altret

This value will limit the silica content of the steam to 0.25 ppm as a function of selective. Feed Water & Boiler water Characteristics as per IS:10392-1982 1.FEED WATER Parameters Upto 20 Kg/cm2 21 Kg/cm2 to 39 Kg/cm2 40 Kg/cm2 to 59 Kg/cm2 Unit Total Hardness <10 <1.0 <0.5 ppm as CaCO 3 pH Value 8.5-9.5 8.5-9.5 8.5-9.5 Dissolved Oxygen

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Basic Water Chemistry - Industrial Wiki - odesie by Tech Transfer

pH is normally maintained at a value between 8 and 9.5, which means that the facility is operating the feed and condensate systems in a basic condition versus an acidic condition. The boiler is operated at a much higher pH, usually around 10.5.

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Boiler Drum Ph Value - food-factory-hamburg.de

PH-value for the Boiler Water - marineprohelp.com. How to plug the leaking tube in the boiler? tools to be used to clean boiler burner tips PH-value in the boiler water is under 7 Boiler drum level control goes haywire Boiler furnace explosion precautions Boiler safety valves functions and design features Precautions when operating the boiler and exhaust gas economizer water circulating pump

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Carry Over From Boiler Drum - brighthubengineering.com

The carryover from boiler drum results in deposits in the internal surface of superheater tubes leading to overheating failures. It also results in deposit in turbine blades which reduces the turbine efficiency. Mechanical carry over take place in a boiler mainly due to drum internals; drum level, foaming and spray water.

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Steam Purity - boiler-wrba.org

Steam Purity versus Steam Quality Steam purity is the condition of the steam in regards to the purity of the chemistry of the steam expressed as ppb (parts per billion) of TDS, sodium, cation conductivity or silica in the steam Steam Quality is the condition of the steam in regards to the % of moisture or boiler water carryover in the steam

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Why boiler drum manholes are elliptical in shape - Answers

as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.

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TOP 50 BOILER ATTENDANT QUESTION & ANSWER FOR EXAMINATION

Nov 19, 2017 · 19. The ph value of water in boiler drum is a. 10.5 b. 5 c. 7 d. 8. 20. The chemical used for removing of air is a. Hydrazine b. Sodium bicarbonate c. Potash soda d. Ammonia. TOP 100 MULTIPLE TYPE QUESTION ANSWER FOR BOE EXAMINATION. 21. The coal with maximum moisture is a. Peat b. Lignite c. Bituminous d. Anthracite 22. The coal with the

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Boiler drum which chemicals are using - Answers

Na3po4 dosing boiler drum is used mainly for two things. To soften calcium and magnesium to make them slushy and to increase phosphate.

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Boiler Drum Level Transmitter Calibration - Technical Note

With the drum level transmitter properly calibrated, the midpoint of the actual readout range, typically 15 to 15 in., is zero, or mid-scale. This generally corresponds to the desired setpoint for the drum level controller. However, in some applications the setpoint may be less than zero and depends on your experience with a particular boiler.

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Ph And Phosphate Concentration In Bfw And Steam Drum

Boiler feed water (BFW) pH is to be maintained in the range of 8.0 to 9.5(guidelines) where as in steam drum pH maintaining guidelines is in the range of 9.5 to 11.0. Pressure of steam drum is 34 barg.

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