Question

answer a nd b with complete details

Boiler is a major equipment in the palm oil mill industry to provide steam for heating and power generation purpose. The source of raw water for boiler is pumped from a nearby river to the reserve pond for further internal and external treatment to remove all impurities, dissolved gases, and mineral content. Superheated steam generated from the boiler is used to run steam turbine for electricity generation and for heating process in the plant. The exhaust steam from urbine is then condensed and later discharged and mixed with waste water from the plant operation to the effluent treatment. Saturated steam Stack Superheated steam Superheater pendant Heat Water tube bole For Control System, for the water tube boiler: a) Determine the system model and response b) Design a controller to achieve a desired system performance

Answer 1

(a) The type of system model is feedback control system with the source

1. The above system is a feed back system
2. The response of the system depends on the amount of the heat condensed to the system by the super heated steam and the amount of source water which is directly from the heater.
3. System response is unsteady because the feed water fed into the system or the boiler might be of undesirable condition

(b) Design of the controller:

→rnost boi (cYg System contain de-a ea ting tank which removes dissolved gasesfrom the fLed wat Y Cthese hee gaso can be cenosive to the rest of th bai ev systom) →The de-arvating tonk is the Source of feedaaten 40Ha pumps Because fud-watery de-atiation is achived Haィongh hea ing The wa tor having the tank Could be very close to the boi uing pojnt . Tha de-aaion tank is lotak J at an elwation above fud wat pumps Ta's ehvation should be choosen in ovdav o de -aevalion tank is lote Pre vent suchovn → Mang fe, dwa tev pumps also have infevn alcooung to cavry out condinsahon cherk valv ae ivnstalud in the system requi more fud pamp,

STEAM DRUMS. WATER DE - CONDENDER AEARATIN4 TANK RE-CIRCULATING LI 시티> BOILER FEEBPUMP Ches) . Valvo MILL CHEADER