As Suggested by others above, consult the filter Manufacturer,particualy in regard the allowable loading on the holddown grid bars (if these are fitted)Do you have DP indication / instrumentation fitted to the units? this should be closely monitored during your trials.
Your present testing regime is definately the best practice, and a generally requirement in NZ. lots of experence of PSV's, RV's coming back from "specialist" shops
and lifting light.
For a simple method, try
eff.= Heat energy transfered to water & Steam
--------------------------------------
Heat energy supplied by fuel
eff. = mass of steam(kg/hr)* (h(s)enthalpy of Steam -
h(w)enthalpy of feed water)...
Check your code. Many would find your setup illegal having any valves/traps on the drain line. If these fail for any reason and with the potential for liquid buildup in the discharge line imposing excessive back pressure on the PSV.
This whole setup scares me.
Ommuruga,
It looks like you are writing a procedure for others to use
step 5 - line out the valving before starting the pump.
the rest looks basically ok.
One suggestion, if possible run a small line from your BFW header into the chemical injection pump discharge header ( exit the pump...
First check your DP indication
Best method I have found is to use two seperate (Independent) pressure transmitters & do the DP calulation via a moore card in your DCS.
Your are basically going to have to do a set of trials to map a pressure profile of your tower.(ensure the readings are taken...
I have worked on Thermo syphon reboilers using both control systems.The major problem with steam inlet control is where a Tower duty is increased (feed rate) and the subsequent need to increase steam flow. Eventually you run the risk of losing the condensate level and blowing thru, (want to see...
