Unit Bhadrachalam 

Energy

The total power requirement at present is 20 MW at peak. Out of which 28 MW are generated in house from 3 turbogenerators of capacities 5 MW, 7.5 MW and 21 MW respectively. The 21 MW TG is extraction cum condensing type. Hence, the net generation from this TG is 17 MW only with full extraction. Other TGS are back-pressure cum extraction type from where we get the required LP and MP steam. Balance shortfall of 2MW is maintained from AP Transco grid.

There are also 5 DG sets ranging from 2MW to 0.5 MW which can give power to considering the cost of power.

 Steam

There are 3 Soda Recovery boilers which give about 140 TPH of high pressure steam. The capacities range from 90 TPH to 20 TPH. There are 5 coal fired boilers, out of which 3 are AFBC boilers with capacities ranging from 20 TPH to 80 TPH.

Other 2 nos are stoker fired boilers. The total output is about 160 TPH. Out of the total generation capacity of 300 TPH only 220 TPH is generated as per the requirement. 200 TPH is passed through turbines to obtain 140 TPH of LP steam at 4kg.cm2, 150 deg C and 60 TPH of MP steam at 12 kg/cm2 220 deg C. The entire LP and MP steam is used n the process of making pulp and paper.


 Air

Compressed air is supplied at 8kg/cm2 for instrumentation and 4kg/cm2 for other process requirement. The air is passed through dryers for attaining dry air with moisture less than 5% . Total consumption 250 Nm3/hr. This attained from 14 reciprocating compressors and 3 air dryers.

 Water

Consumption is 20,000 m3/day. Raw water pumped from river Godavari and subsequently treated. 2 nos clarifier and 1 no clarfloculator is used for the purpose. Chemicals are added in required doses at this point. Finally passed through sand fllters to attain a trubidity of less than 10NTU. Treated water confirms to WHO norms.

 Environment

• About 15,000 m3 / day of water is returned to the river after removal of all organic and inorganic effluents and proper treatment meeting all accepted pollution norms.
• All boilers are equipped with ESPs to maintain the emission norms at 75-100mg/m3 as against 115mg/m3 specified in the norms.
• The waste lime is reheated n limekiln and dused in the process to eliminate discharge in the ground.
• The corrosive gases from the new pulpmill is passed through scrubbers to avoid their discharged in the atmosphere.