ITC PSPD (Bhadrachalam) is one of the biggest and renowned paperboard manufacturers in India. The unit has integrated pulp mill and 7 no’s paper and board manufacturing machines powered by its own thermal power plant of installed capacity of 140 MW with a network of 6 turbines and a battery of 9 boilers, which include 3 no’s Soda recovery boilers and 5 no’s Atmospheric Fluidized bed combustion (AFBC) type and 1 no Circulating Fluidized bed combustion (CFBC) type coal-fired boilers. AFBC and CFBC boilers generate high-pressure steam with 62 ata, 102 ata and temperature 480 degrees C, 525 degrees C respectively. One of the AFBC Boiler of capacity 90 TPH consumes Low-pressure steam 0.150 Tons per Tons of High-pressure steam (Specific LP Steam) which is very high. This can leads to an increase in the cost of HP steam generation. Higher specific low-pressure steam consumption in boilers is a serious concern for the organization because of the low-pressure steam cost is nearly Rs 750/ton The reason for High LP steam consumption is Low Feed Water temperature which is coming to Deaerator. So we would like to increase the temperature of DM water by recovering heat from a process which is venting to atmosphere