PH of Feed Water in Steam Drum

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pradeep4u Active Contributor Join Date: Mar 2017 Posts: 15	PH of Feed Water in Steam Drum 03/25/2018 3:51 AM
	Dear All I want to know that why after dozing ammonia or morphiline at upstream of deaerator we doze trisodium phosphate in steam drum to increase PH . Whether PH of water comes down when water reaches boiler then how PH reduces? Regards Pradeep
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33272 Good Answers: 1809	#1 Re: PH of Feed Water in Steam Drum 03/25/2018 2:05 PM
	I would suspect that it has to do with the materials, alloy types, and temperature of operation....these vary throughout the system and must be addressed to control corrosion.... https://www.suezwatertechnologies.com/handbook/boiler_water_systems/ch_11_preboiler.jsp __________________ All living things seek to control their own destiny....this is the purpose of life
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spades Guru Join Date: Aug 2014 Location: Port Macquarie N.S.W. Australia Posts: 1071 Good Answers: 225	#2 Re: PH of Feed Water in Steam Drum 03/25/2018 7:52 PM
	While TSP does assist with pH maintenance, its main purpose is to combine with any remaining salts in the feedwater, the resulting sludge settles and is removed either automatically or manually at blowdown.
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jdretired Guru Join Date: May 2007 Location: Australia. Posts: 1642 Good Answers: 81	#3 Re: PH of Feed Water in Steam Drum 03/25/2018 11:09 PM
	https://www.ripublication.com/ijame-spl/ijamev4n6spl_06.pdf
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32067 Good Answers: 838	#4 Re: PH of Feed Water in Steam Drum 03/26/2018 3:03 AM
	Surely there must be an Operating Manual for this equipment that says so? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32067 Good Answers: 838	#5 Re: PH of Feed Water in Steam Drum 03/26/2018 10:41 AM
	Raising the pH of the drum contents is a Good Thing as regards protecting the structure of the boiler against corrosion. Ammonia and morphiline increase pH and leave no residue in the drum, which is a Good Thing, as there is less sludge to wash out or blow down. Trisodium phosphate is a cleaning agent, which is a Good Thing, and aids in the formation of sludge, which is removed during blowdown or washout, while keeping surfaces clean, which is also a Good Thing. End of. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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nvirciglio Commentator Join Date: Oct 2012 Location: USA Posts: 95 Good Answers: 4	#6 Re: PH of Feed Water in Steam Drum 03/26/2018 1:05 PM
	Morphiline and ammonia are volatile and TSP/DSP are not. That means the phosphates do not get carried with the steam but stay in the water. __________________ If you can't explain it simply, you don't understand it well enough. AE
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