Pressurized shell - water tube boiler

[HowJoh]

Hi All,

Is anyone here familiar with a manufacturer that offers water tube boilers (~50 MW) which have been designed for furnace gas pressures of 0.5 bar(g) shell side?

Thanks,
Howie

 

[MJCronin]

How....

Your boiler/combustion needs are unique..

I would search for those boiler fabricators who specialize in waste-gas application for your high-pressure 0.5 bar design. Do you have a limit in mind for the gas side pressure drop and where will such a drop occur in the boiler ????

Do not be surprised if you do not get the thermal efficency that you expect from your unique design as most smaller watertube boilers are designed for + or - 30 IWC casing pressures. Your high-pressure design will probably require compromises which will decrease efficency.

Why must the gas stream be maintained at such a high pressure ? What is downstream of the boiler ?

An all-welded boiler boiler with membrane walls will probably be best..

Anyone else ?

-MJC

 

[davefitz]

sounds like a blast furnace gas BFG case. They are still popular in Japan- check with IHI, MHI, Hitzchi, kawasaki etc.

 

[kbs]

.5 bar gas supply pressure or .5 bar overfire pressure.
I've dealt with the higher gas supply pressures, never ran into an overfire pressure that high.

 

[HowJoh]

Thanks for your replies guys. The unit is to be between a thermal oxidizer and a process system which further treats the products of combustion. The pressure I've quoted is the overfire pressure caused by the balance of the plant after the boiler (WHSG).

Howie