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jitu_gla
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Join Date: Jan 2010
Posts: 8

edta of boiler

02/06/2010 12:12 PM

sir, i want to know that what is edta cleaning of boiler ,tell me in detail what no of actvity carry out for doing so. what is ph value control in boiler
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ducon
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#1

Re: edta of boiler

02/06/2010 12:27 PM

jitu gla - "edta" maybe you got this word wrong for there is no such word. You are actually referring to chemical cleaning of a boiler to corrosion & remove scales.

what is ph value control in boiler - In order to minimize corrosion of boiler hardware, the pH of feedwater must be controlled within a narrow range. Too low a pH will result in excessive corrosion of iron components, while too high a pH will result in attack on copper containing parts.

To help you out further, log on to : http://www.gewater.com/handbook/boiler_water_systems/ch_11_preboiler.jsp

Corrosion Tendencies of Boiler System Components

Types of Corrosion

Mechanical Conditions Affecting Corrosion

Metallic Oxides in Boiler Systems

Corrosion Control Factors

Corrosion Protection during Downtime and Storage

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ducon
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#2
In reply to #1

Re: edta of boiler

02/06/2010 12:29 PM

corrosion & remove scales to be read as remove corrosion & scales. Sorry.

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Alexander M. Berlin
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#3

Re: edta of boiler

02/06/2010 3:54 PM

The deposition of iron oxides, metallic copper, and other impurities on boiler tube surfaces causes loss of heat transfer efficiency at electrical power plants. Hence, the tubes are cleaned every 3 – 5 years in order to restore the heat transfer efficiency. Chelating agents, mainly ethylenediaminetetraacetate (EDTA) and its salts, have been extensively used for the removal of metal deposits from the boiler tube surfaces.
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ducon
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#4
In reply to #3

Re: edta of boiler

02/07/2010 12:16 AM

ethylenediaminetetraacetate (EDTA) - Thanks Alexander. Its a chemical name , i thought it was an english word. No wonder it is EDTA, my tougne is twisting in pronouncing the chemical terminology. You taught me something new.

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PWSlack
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#5

Re: edta of boiler

02/08/2010 3:20 AM

Sodium EDTA is dosed into boiler feedwater as part of a maintenance regime. The chemistry, is not done in-house, is probably best administered as part of a contract with a specialised chemical dosing company.

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