flash steam
flash steam
(OP)
I wish to produce some steam by using the energie of smokes resulting from an furnace of combustion which produces 40000 kg / hour of smokes. The flow of smokes which will be used for the production of the vapor is 7000 kg / hour to produce 150 kg / hour of vapor. Given that the quantity of vapor is far too small of a boiler to build using a traditional steam
drum, I thought of making circulate more water than steam needed and at a pressure where it
doesn't evaporate in the coil, then direct the flow to a separation
tank(small drum) to vaporize at pressure required. I wish to have suggéstions concerning the design of the valve allowing this depression and the feasibility of this solution. The vapor generated in 5 bar will be used to warm the fuel oil by the intermidiaire of a heat exchanger.
thanks
drum, I thought of making circulate more water than steam needed and at a pressure where it
doesn't evaporate in the coil, then direct the flow to a separation
tank(small drum) to vaporize at pressure required. I wish to have suggéstions concerning the design of the valve allowing this depression and the feasibility of this solution. The vapor generated in 5 bar will be used to warm the fuel oil by the intermidiaire of a heat exchanger.
thanks





RE: flash steam
why not heat the fuel oil directly by means of the pressurised water?
grtz
Ben
RE: flash steam
RE: flash steam
This is what I understood from your post and I am running the risk of answering in a totally wrong way, if my understanding is wrong.
Afterall they say, curiosity killed the cat
Your total flow of smoke is 40000kg/hr and you are utilising only 7000kg/hr out of that to produce 150kg/hr of vapor(is it steam?
If this is so, I have few comments. 1) First thing is what is your smoke temperature before heating water and after heating water.
2) What is the minimum temperature to which you can reduce the smoke temperature? (consider sulfur condensation for this)
3)The sensible heat of water is 1kCal/kg deg.C and latent heat of evaporation is 550 kCal/kg deg. C. This means if you want to produce flash steam, you require to use approximately 55 kgs of water for 1 kg of flash steam. (if you reduce pressure by 1 kg/sq.cm)
Your second post is still confusing me because, heat water at higher pressure, then depressurise it, convert it to steam and use it for heat. Or else directly use hot water in one single step is one and same with better efficiency in later case.
Regards,
Truth: Even the hardest of the problems will have atleast one simple solution. Mine may not be one.
RE: flash steam