How Deaerators Work (Engineering)
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- Опубликовано: 27 окт 2019
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Learn how deaerators work! This 3D animated video introduces the spray and tray type deaerators. You will learn all of a deaerator’s main components, its typical operating conditions, different designs and how it works.
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▶️Introduction
Deaerators are required to remove dissolved gasses from the boiler feedwater system. The two gasses removed are primarily oxygen and carbon dioxide. It is necessary to remove these gasses as a failure to do so may lead to corrosion of boiler components.
Deaerators are classified as un-fired pressure vessels, although they often operate at very low pressures e.g. 0.5 bar / 7.5 psi, 105 C / 130 F respectively.
Deaerators mechanically remove entrained non-condensable gases by raising the temperature of the water to its saturation point. The solubility of the gases reduces as the temperature increases, so the level of entrained gases reduces as the temperature increases. A deaerator is essentially a pressurised feed water tank, although non-pressurised (atmospheric) tanks can be used for smaller steam systems.
High levels of oxygen will lead to corrosion of boiler parts, which may lead to failure of the boiler. Typical problems associated with high dissolved oxygen levels include flaking of the water side boiler surfaces and oxygen pitting (deep holes in the metal surfaces).
High levels of dissolved carbon dioxide leads to a lower pH, which will make the boiler feedwater acidic. Low pH water causes corrosion of the carbon steel parts of the boiler and steam system components.
Two common deaerator designs are used in the engineering world, these are the spray type, and tray type. Both deaerator designs require a large contact surface area between the water and steam, in order to aid heat transfer. The steam heats the water to its boiling point, or very close to it.
Condensate from the steam system is returned to the deaerator and make-up water is fed into the deaerator. Chemical treatment also occurs in the deaerator; typically an oxygen scavenger is injected into the deaerator to remove the final traces of oxygen. Bicarbonate and amine-type chemicals are used to control the boiler water pH, they are usually injected with the make-up water or between the deaerator and boiler.
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Sodium Sulphite=L.P. Boilers
Hydrazine = H.P. Boilers
Also if you have covered Deaerator kindly consider covering all topics of closed feed water system.
And above all nice video.👍
Having been a power station operator for 36 years (recently retired) I can say that this is the most comprehensive and easily understood piece I have ever seen explaining the function of a deaerator. .
Well done!
Put two Rilley stoakers to "sleep" in 2013! Sad day! Lost art! Burning gas, hardest thing is to just stay awake!
"orifice" is a well engineered, uniform design, calculated and dynamic hole... not just any hole. An orifice costs upwards of 30x or more what you can charge for a hole. Remember to bill appropriately. "Drilled 3/8'ths hole, deburred: $5.95" "Excavated a precision 9.525mm smoothed and chamfered orifice in location of best effect: $174.00 + $8 tool wear."
This comment is so good that I had to screenshot it.
I think it is safe to assume that everything in these things are well engineered. A simple "hole" fits to my level of understanding much better thank bunch of jargon
Expensive hole.
@@machinemaker2248 same 🤣
This is an essential video for any engineers that are just starting to work in a power industry. Good job sir!
Definitely the best tutorial I have ever watched. I like the way you introduce knowledge which is clear and detailed.
I use to work in the UK on boilers in the NHS. I wish this was available back in the 80s. Great videos. Cheers from NZ
We are now 3 hours deep into your videos, and I must say these are incredibly well explained the details in your videos are phenomenal. Subscribed with all notifications on. Keep up the great work!
I wish I was taught in this way in college. Excellent teaching. God bless you.
The government don't want you being too smart too quick they want us to be smart enough to work but dumb enough not to ask questions about tax, poison food and inhibited freedom.
@@obviouslytwo4u The government does not dictate a professor's syllabus.
Govt want to study but dnt want to gain knowledge. They are good at fooling all
😂
Same thought came into my mind. I studied thermal power plant engg. at National Power Training Institute.
This was probably the best explanation video Ive ever seen. Amazing job, thank you!
What an excellent and comprehensive explanation of this vital equipment, thank you so much!
Holy molly! Your voice and the way you explain are definitely clear, infomative and scientific. Honestly, I've had to watch at least 3, 4 videos or more to discover any engineering topic, but this video is the exception - Only this is enough! Respect and thank you!
By far the best explanation I have ever come across! Thank you very much, sir. You've got one more subscriber here.
Great explanation of this piece of equipment! Great information here.
Recently I've been told to do reserch on deaerstors at university
But non of the web-sites I've saw gave me so much understanding of this theme as this video
Thank you so much for this video and all of the effords you put in it.
This is really full information folks!!! Great job!!! Many Thanks!!! 🙏
Highly appreciate your efforts....nothing like this on you tube except yours
I think colleges should start to use your videos to explain students.....new era of teaching
This is an excellent explanation of a deaerator vessel...thank you sir...
best ever tutorial..will recommend this to my friends..thanks!!
Thanks for the session....Waiting for another set of sessions now!
Got clear understanding, thanks for the explanation & illustration!
Great explanation. Very detail and easy to understand.
Jon, I want to thank you for all your efforts. I use a number of the videos you have made as instructional aids in our apprenticeship courses for our Boilermakers and our Thermal Systems Engineers at California Boiler, Inc. Excellent resource!
Hi Brian,
Will send you an email. The 3D model side of saVRee might also be interesting for you.
@@savree-3d please give me an email I can use. I would love to look deeper into your program. Thank you
Excellent video! Was very helpful. Most appreciated.
I am an engineering student, and I just wanna say this channel is AWESOME
Thanks! Much appreciated! Feedback is the reason I get out of bed in the morning.
@@savree-3d thanks I'm starring at a jhonston boiler rn hahahahahahhaahahhaha
What a great explanation from you, Sir! Because of this video, it's easier for me to understand the working of deaerator. Thank you so much!
## The process through which the dissolved gases are removed from water is called the “Deaeration Process”. The equipment, which is used in this method, is called “Deaerator“.
# Why do we use deaerators?…
The Deaerator (DA) tank uses steam to preheat boiler feedwater to a temp. at which dissolved O2 & CO2 will become separated from the feedwater before it is pumped to the boiler. The purpose is to protect the boiler and steam/condensate piping from corrosion that would be present when the water evaporates into steam. An additional benefit is that the number of chemicals used to treat the boiler water can be reduced.
#water #watertreatment #saftey #boilers #explotion #hazard #plant #construction #construction
techproces.com/deaeration-process/
Very nicely covered.thanks a lot in the quarantine time to help me by this🔥
Easy and to the point reflecting the deep understanding! One more thing can be added is how deaerators depend in also Henry’s law along with the Temp. Effect in solubility… thenk you again dear.
Fantastic video, it couldn't be better! well done!
Thank you very much for sharing. The second type with scrubber tend to create more vibration.
Magnificent piece of work!!!
I absolutely don't need to know this, but I still love the quality of the video!
...VERY informative to a non-engineering person, and VERY clearly explained! I shall click 'subscribed' now.
This was awesome, love it bro!! Keep it up 👍🏽
One of the best lectures I have ever listened to. Keep it up and patiently explain in every video as this.
Thanks a lot. Nice to know our videos are making a difference.
A very informative and fruitfull tutorial I have ever watched..
Each and every explanation of your working principles of Engineering Equipments videos are wonderful and the way you explain in the videos are easily grasping into the mind.... I fell in love watching all your engineering videos..... Thanks once again...for the lovely videos Mr John...
Like a lot I will sure share this video with friends # Thanks from KSA 👍🏻
Thank you for your video !!
excelente video, explicación clara y práctica muy bien
Great Job explaining, and very illustrative! Thank you!
Glad it was helpful!
Amazing. Thank you for your efforts
Thank you very much!!! Brilliant explanation!!!
Fantastic explanation. Thank you!
One of the best videos. Liked a lot. Keep this work.
Maybe in the future videos alternative pumps.
Well explained. Thank you
a really good video, and a really good education
Glad you guys are back. I'm not sure if this kind of video is in your wheelhouse, but I haven't found a good video on how High Voltage Power Circuit Breakers work. Like the ones that are filled with Sulfur Hexafluoride and disconnect Power Plant Generators from the Grid, or the ones located in a High Voltage Switching Station. If you know how those work and can make a video, or series of videos for them, that would be outstanding. Also, I've found videos on how Power Plant Generators work, but it would be nice to hear your explanation of it. Also, if you could do a video on a Synchronous Condenser, and how it works, that would be excellent as well.
interesting, although I have no use for one. Very well explained.
Interesting indeed! Understood very well!
Simply incredible.
Fascinating!
Great teaching! Subscribed.
Excellent explanation. Commendable efforts in preparation of this video. Clears all ambiguities. Impressive and helpful.
Very good demonstration of the deareating system of boiler feedwater
Wow! You’re a really good narrator, and with your 3D models videos it’s really help a lots.
Thanks so much sir👏🏼👏🏼👏🏼
You're very welcome!
Great learning...thank you...👍
Great explanation! Thanks a lot sir!
Excellent !
Great video! Thanks!
Wonderful Job. Thanks a lot. I can't thank you enough for the indepth explanation provided. On a different note, I see that you have a video on water tube boiler with coal firing, which in my understanding is getting less and less due to environmental concerns. It would not take that extra effort to update the existing water tube with gas firing system including Flue recirculation systems. THANKS once again !
I like it
Thank you for sharing
Great video. Thanks for the information.
Dude, I fucking love you. I've been studying engineering books and your videos makes it much easier for me to understand. I'm going to take a stationary engineering test soon (not scheduled yet), and I'll be watching your videos.
best video ive seen. thank you.
Excellent explanation. Thanks
Nicely explained
Awefull explanation !!!
Great explanation
Thank you sir
Excellent sir.... Loved ur explanation
Thanks for this teaching. Hope you will do more videos like this and educate the world
We will!
Excellent video. Thanks alot
thanks a lot for the video. it explained well.
Thanks for sharing 😊
the video is very easy to understand, helpful, Thanks Sir
Great video. Thanks!
Very nicely explained..!!
Operating 30 tone excavator this played!! I now have more understanding of how Venus's oceans boiling off contributed thanks 👍.
Thanks for your sharing
very well explained
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Although a little unrelated, this explains why drinking water from a kettle tastes better. The Ph is higher, so the water is less acidic. In a way the kettle "deaereted" the water, just by boiling it and thus removing the non condensable Co2 and O2
In a kettle, you also get precipitation of carbonates on the heating elements and other surfaces, which reduces Ph, so it's probably a bit more complex set of effects.
Great explaination....
Excellent video.. exactly what I was looking for
Glad it was helpful!
thank you very much for your video !
Super mapla verra level uh,😍🔥✌️
I have no idea what I'll do with this knowledge, but thank you for a cogent presentation of it.
thanks for making very detail informative video it will help me a lot working as plant operating engineer thanks again
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Well done 👍 ✅ .
Thanks 🙏
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Thank you! 😀👍
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wow what a teacher he is!
Thank you
muito bom - parabéns!
Seloko, mano! Bom dms esse vídeo
I thank you so much for this wonderful tutorial, im a ratings on a ship, im studying so i can be a marine engineer someday
Thank you very much, I am Indonesian