mahmmoud30
Chemical
- Aug 6, 2009
- 21
hi all
tha attached pic is our stripper at Naphtha hydrotreating unit (NHT),after u see the pic plz answer me for?
1- why try no. 5th from top is selected as a temp. control while the common practice is the top tray temp will be controlled by the reflux flow.
2- why the TIC-1036 is cascaded to FIC1014(this product(LPG) we send it to another unit) and not with reflux flow
3- why the level of the reflux drum is cascaded to the reflux flow (LIc1008 with FIC1013)?
4- also the temp. control of the reboiler furnace (F-71102) has a selector TS1001 between 2 controls, the TIC1020 is the calssic but i want to know more about PDIC1001
thanks for being helpfull
tha attached pic is our stripper at Naphtha hydrotreating unit (NHT),after u see the pic plz answer me for?
1- why try no. 5th from top is selected as a temp. control while the common practice is the top tray temp will be controlled by the reflux flow.
2- why the TIC-1036 is cascaded to FIC1014(this product(LPG) we send it to another unit) and not with reflux flow
3- why the level of the reflux drum is cascaded to the reflux flow (LIc1008 with FIC1013)?
4- also the temp. control of the reboiler furnace (F-71102) has a selector TS1001 between 2 controls, the TIC1020 is the calssic but i want to know more about PDIC1001
thanks for being helpfull