4 replies to this topic

[ktrone]

Big confusion with these terms

[djack77494]

Big confusion with these terms

There is no official source or authority that we could appeal to for help. In common engineering usage, a Boiler is a device that produces steam by boiling water. They are generally fired, but there are also Waste Heat Boilers that are not fired. I am not familiar with the use of the term "Vaporizer" industrially. I would take it to be like a Boiler but dealing with a fluid other than water. Heater is a very general term that may be applied to a fired heater used to add heat energy to a fluid - vaporization may or may not occur - or it may be a shell & tube or other type of heat transfer exchanger.

[chau]

Big confusion with these terms

There is no official source or authority that we could appeal to for help. In common engineering usage, a Boiler is a device that produces steam by boiling water. They are generally fired, but there are also Waste Heat Boilers that are not fired. I am not familiar with the use of the term "Vaporizer" industrially. I would take it to be like a Boiler but dealing with a fluid other than water. Heater is a very general term that may be applied to a fired heater used to add heat energy to a fluid - vaporization may or may not occur - or it may be a shell & tube or other type of heat transfer exchanger.

Hello djack77494

Great to have a interaction with you and we fond you to have been helping the student in pretty considerable manner. As you bounced the subject with waste heat rceovery boiler,i would like to get yor concern on below matter

We in a cement plant are going to install waste heat recovery boiler in objective to generate power and undoubtly to utilize the waste gas. Apparantly we have been interacting with our boiler, and are satisfied with their engineering apparoavh to utilize the waste heat to generate steam. Our anitipated operational parameter

1) Steam 45 TPH@17BAR

What i want to get your concern emphatically is , there could be some way to increase the heat and temperature heat source. Heat source we are using is kiln gas from preheater and cooler. Here i want to increase the temperature of gas which is 360DEG originally. Is there any more innovative way to steepup th etempreature of gas in effort to increase the power generation.

Would you suggest any other methodology other than firing

Awaiting for your valuable concern

[djack77494]

chau,
Thank you for your kind words. Based on the description provided, I cannot assemble in my mind what your system looks like, and therefore cannot offer you good advise. Remember that the primary function of a rotary kiln will be to heat/dry your solid materials. Waste heat recovery is secondary and must not drive the design. If practical, please include a sketch in any future posting.

[riven]

Big confusion with these terms

Just using the names

A boiler is a unit that is used to create a boiling liquid and perhaps a vapour as in a (re)boiler on the bottom of a distillation column.As the boiling of a liquid will nearly always generate vapour you could always assume two phases (liquid and gas) are present io a boiler.

A vapouriser's job is to produce vapour (a condensable gas) and ususally at a superheated state so as to ensure that there are no liquid drop present in the vapour. However this definition could be applied to many instances. I would use evaporator more often. The goal in an evaporator could be to dry a solid mass by evaporating or vapourising any liquid for example.

a heater is generally used to heat a single phase i.e. heat a liquid or gas from temperature x to y. You could assume that this type of item contains only a single phase.