The steam introduced into the deaeration section is to heat the incoming water to the boiling point - at whatever the operating pressure is - so as to drive off dissolved gases, primarily oxygen. Typically, the storage section is unheated. You can do direct steam injection to heat water, but...
I've used systems like Pick heaters, and they work fine. However, most of the heat "lost" from the condensate is returned (or should be) to the boiler system. Whatever condensate is not returned must be replaced by make-up water, which must be treated, first by whatever pretreatment equipment is...
Have you considered using the hot wash water going to drain to preheat the incoming cold make-up water? You could recover a lot of the heat (already paid for) plus cool the hot water before it hits the sewer system.
The only situation in which I've seen the boiler safety valves lift because the burner controls couldn't react quickly enough - and the entire flywheel effect of a hard-firing boiler - is a main turbine trip in a central generating station.
Having a booster pump supplying the boiler feed pump is an arrangement that I've never seen - in my experience it's very odd. Was the booster pump installed to deal with BFP suction problems?
I think this will be ugly, no matter what you do in the way of repair, and I don't see it lasting very long. I don't know that I'd attempt any kind of weld repair - you run too much of a risk of having more and/or bigger holes appearing. Can you run a temporary parallel line or even a hose so...
There are a number of factors - and various combinations of those factors - that come into play with DA design and configuration. I've even seen a vacuum deaerator (just one in about 50 years) installed in a boiler house. I worked in a central station where the DAs operated at 150 PSIG - which...
The reason I mention variations in temperature of the make-up water, is that is something that needs to be considered when using surface water sources in colder climates. For most of my life, I lived and worked close to the Great Lakes in Canada, and that was the water source. In Aug, the water...
What continuous blow down rate are you considering? At 100% make-up, I'd guess about 10%? If that's the case you'll need to send about 125,000 kg/hr feedwater to the boiler. I'd allow at least 130,000 kg/hr feedwater to the boiler so as to allow for bottom blow down, as well as the gauge glass...
Instead of having one large valve, I'd look at using a pair of half-capacity valves, and stagger the setpoints slightly. This will give you much better turndown, is often significantly cheaper in total, and the smaller valves typically have a shorter delivery time.
I don't have the background information on this project that you do, but as an earlier poster mentioned, the boiler burner controls should be able to run the firing rate back to compensate for a drop in steam load. The steam header should have a pressure transmitter mounted on it, tied-in to the...
I'm curious - why is the piping rated for slightly lower pressure than the rated pressure of the boilers? Why not have the piping rated for 16 bar to match the boilers? That way, the boilers cannot overpressure the associated piping.
Are you planning to use the proposed control valve as the...
I'd look at something like a Vevor diesel heater - they're made for exactly this kind of application. 8kW unit on Amazon.ca for about $120 Cdn right now. Lots of Youtube videos on these. Comes with an installation kit and instructions. Most people with RVs mount them in an external storage...
I'm not convinced that this is necessarily a chemical attack issue. I've seen external corrosion like that on uninsulated cold water pumps that were located in a humid area. Could have been something like a leaky fitting where the seal flush connects to the pump. Any minor leakage like that...
Pump seal/packing leak. I see that as the only way to explain the corrosion extending to the top hole in the coupling guard and the small diameter piping - it was sprayed there by a running pump. Corrosion this extensive didn't happen from one day to the next - doesn't look like the...
"... so i hope at least i could help from my level to verify the design level aspects."
I believe - based on the information discussed here - that the design as it stands will leave the operations & maintenance people with significant and ongoing challenges.
It's entirely possible that my...
The boiler of course needs the capacity to deliver the amount of steam required for your process, but my question is why operate a boiler at 10 kg/cm2 when the only steam load you have appears to require a header pressure of 3-4 kg/cm2? Why spend a lot of money installing a pressure reducing...
Why wouldn't you simply install a steam boiler that operates at the required lower pressure, and just skip the PRV station altogether? Is there a future project that will require the higher pressure?
There are steam rated globe style valves that are designed to be manually throttled. I don't know how temperature sensitive this process is, but I suspect that trying to control this by hand will be frustrating.
I have designed, installed, operated & maintained hundreds and hundreds of steam...
