Inert Gas Requirement

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bhalchandra Commentator Join Date: Aug 2010 Location: pune Posts: 69	Inert Gas Requirement 06/10/2013 3:00 AM
	Dear Sir,I would like to know about estimation of inert gas required when there is solids flow.for typical situation, bunker feeding solids to extruder. we know extruder throughput. for liquid, as per API 2000 std is 0.94 nm3/hr of air as inbreathing requirement per m3/hr of liquid outflow. So, for solids does the same ratio applies ? Would like to know, how we arrived that 0.94 nm3/hr of air for m3/hr of liquid outflow required? RegardsBhalchandra __________________ Be not afraid of growing slowly, Be afraid only of standing still.
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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: 32175 Good Answers: 839	#1 Re: Inert gas requirement 06/10/2013 3:19 AM
	Please describe the solid and its particle size. What is the ST number in terms of its explosivity? __________________ "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: 32175 Good Answers: 839	#2 In reply to #1 Re: Inert gas requirement 06/10/2013 3:59 AM
	http://en.wikipedia.org/wiki/Dust_explosion __________________ "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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bhalchandra Commentator Join Date: Aug 2010 Location: pune Posts: 69	#3 In reply to #2 Re: Inert gas requirement 06/10/2013 5:46 AM
	Dear Sir, Solid is Phosphorous pentasulfide, particle size is powder form ( appx. 100 - 200 microns ). About ST no. or dust explosion class information not available. But, mini. oxygen conc. is 2% by vol. Regards __________________ Be not afraid of growing slowly, Be afraid only of standing still.
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JPool Guru Join Date: Apr 2012 Location: Detroit MI, USA Posts: 2496 Good Answers: 271	#4 In reply to #3 Re: Inert gas requirement 06/10/2013 6:35 AM
	"About ST no. or dust explosion class information not available." Really??? Do you not have an MSDS for this? I just read the MSDS and Phosphorous Pentasulfide dust is extremely explosive in air. At only 0.05% by volume. __________________ How we deal with death is at least as important as how we deal with life. --CAPTAIN KIRK, Star Trek II: The Wrath of Khan
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bhalchandra Commentator Join Date: Aug 2010 Location: pune Posts: 69	#6 In reply to #4 Re: Inert gas requirement 06/10/2013 6:56 AM
	Dear Sir, In MSDS from Sigma Aldrich, P2S5 forms explosive mixture with air at 0.5% wt / vol. Regarding ST no. i have not found any data. __________________ Be not afraid of growing slowly, Be afraid only of standing still.
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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: 32175 Good Answers: 839	#5 In reply to #3 Re: Inert gas requirement 06/10/2013 6:54 AM
	<...mini. oxygen conc. is 2% by vol...> Minimum or maximum? Once that number is established, the inerting question responds readily to a little arithmetic. As above #4↑, the Material Safety Data Sheet contains much valuable information. A Google search will reveal it. __________________ "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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bhalchandra Commentator Join Date: Aug 2010 Location: pune Posts: 69	#7 In reply to #5 Re: Inert gas requirement 06/10/2013 7:05 AM
	Dear Sir, It is given as desired safety margin of appx. 2% by volume. So, it is maximum oxygen concentration. Regards __________________ Be not afraid of growing slowly, Be afraid only of standing still.
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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: 32175 Good Answers: 839	#8 In reply to #7 Re: Inert gas requirement 06/10/2013 8:45 AM
	Good luck with the arithmetic. __________________ "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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