In day to day life we have to deal with Pressure vessel / heat exchanger manufacturing code.These codes are not performance oriented code, these are safety oriented code. The basic approach of the code is from user point of view.. more the hazard stringent will be the code. The Category of the pressure vessel are […]
Lets do the Quick CaclulationInputsActul Flow in m3/hr ?Design head MWC ?Operating head MWC ? Minimum Flow required for safer operating of the pump ?How the by pass is maintained, using Orifice or control Valve ?Let Boiler Steam flow rate is 31000 kg/hr Flow32.488 m3/hr X 1.05 (design factor) + Min. bypass flow via orifice […]
Design of any heat exchanger is manly depend upon the flow configuration.As discussed before the configuration could be of three type (majourly) Parallel Flow Counter Flow Cross Flow The compactness increases from Parallel flow to Counter Flow to Cross Flow While complexity increases in reverse direction. The superheater has flue gas on one side & […]
One thing we must remember while designing super heater.. Better the steam dryness compact will be the super heater. One must always ensure that dry steam (99%) is coming in the superheater.Just to give you the picture.. for 98% Dry steam.. the unit energy required to make steam 100% dry+70ºC superheat is : 61.5kcal/kg for […]
See the attached screen shot of the program.It includes all possible configuration of the Super-hater.The program is for Convective super-heater. Main Window The Super heater module
A Major component of the Boiler Superheater are of Two Type1. Convective type2. Radiant type Convective super heater gives maximum of 80ºC of Superheat while, Radiant Superheat can give 150-300ºC Superheat. Former is more prone to thermal failure & rarely used in ‘flue gas boiler’. I’ll discuss the convective type super heater.The basic criterion for […]
Nox is majourly a function of Burner & then a Boiler. Mainly in retrofit market Nox commitment can be achieved by changing burner design & Burner refractory. Type of Nox1. Thermal Nox Contributes to 80% of Total Nox2. Instant Nox Contributes to 15% of Total Nox3. Fuel Nox Contributes to 5% of Total Nox I’ll […]
Burner Design Three parameters decides performances of the burner1. Turbulence, May be created by ‘Swearler’ & high velocities, which results in better fuel atomization. optimum size of fuel droplet is 50 microns2. Time, Time of residence, residence time of the fuel during combustion, for gas its low, for LDO its high & for FO its […]
Hi I’m making this live again.. lets start with Burner!! The Flame Visibility 1. Low Luminous flame causes, Non uniform Temperature & heat flux distribution2.Low Luminous flame causes Poor radiant heat transfer & hence lower thermax efficiency3. While More luminous flame gives Good radiant heat transfer, Low flame temperature & low NOx Flame Geometry & […]
CHF (Critical Heat Flux) During the brainstorming session, we have come with a critical question on ‘Furnace life’ due to higher heat loading in the furnace. during the ‘research’, I came across a term, Critical heat flux(CHF) or the ‘burn out point’. The past decade has witnessed unprecedented improvements in the performance of packaged boiler […]