3 replies to this topic

[smarttguy1]

Hey
i m currently doing my final year project and name of my project is production of ethylene from napthta!! i have to to design waste heat boiler to cool the cracked gases coming from furnace at 820 C . kindly can u tell me what is the method to design and what will b the maximum temperature output achievable and at which temp steam will b produced!!if anybody has already designed it plz help
i shall b thankful to u

[Atir]

Hello
I am the student of Final year Chemical engineering and designing a waste heat boiler for contact process to cool down the gaseous mixture coming out of burner from 1123K to 703K and use this energy to produce saturated steam. Can any one help me in the thermal design of this Waste heat boiler. if the helper require any thermophysical data I can provide.
I shall be very thankful for the helper.

[acer_asd]

At my plant, we produce MP steam ( @18 kg/cm2 g) from the incinerator (temp-1200) and furnace (temp-500). Although i personally think that LP steam (@4kg/cm2 g) should be generated because it will give you higher LMTD and you will need less area for WHB but it also depend on requirement of the steam in other section of the plant. For designing the WHB, you can use softwares like HTRI or you can use traditional methods like kern, method.

Hope this will help you in your project

Have a nice day.

hi! good day everyone.

I currently doing my final year project on energy recovery in waste boiler. since this is an industrial problems, so not much info I could get. and it can be described as followed: the boiler (without process steam) was designed to produce 50 bar of superheated steam, however amount of steam produced is less than 25% as it is required. thus, I have to find the energy balance and energy loss in the boiler flue gas stream.the wastes involve; off gas, acid water and residue.the wastes were burnt with some auxiliary fuel and combustion air is used. Boiler feed water and generated steam from other plant are also supplied to this boiler. Plus, the flue gas produced is at 300oC with highly amount of wet flue gas. anyone can help me to give some idea on this energy balance??

*Sorry for my broken English.