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Tata Lucknow Waste Heat Recovery Project
Tata Lucknow has 3 no of Durr Ovens ED Oven, TC Oven 1 & TC Oven 2.
Heat recovery unit will be installed in ED Oven, TC Oven 1 & TC 2 Oven
Total Heat Recovery from Hot flue gas from oven Exhaust is approximately=
Waste heat of Oven will be used to raise the temp of water used in PT CED line from 85o C to 95 o C
Total project cost = Rs 1.06 cr.
Return on investment 10 months
Propane savings 75 kg/hr with annual savings of Rs 2.2 cr (propane price Rs 72 per kg)
Project Highlights
828100 Kcal/hr
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TC-2 Oven
TC-1 Oven
ED Oven
Hot Water Generator 1
KOD Hot Water Rinse Degrease ActivationPhosphating
Hot Water Generator 2
PT Tanks
Hot Water Supply (85°c) to PT tanks
Return Water from PT tanks (75°c) to Heat Exchanger then Hot Water Generator
Exhaust to atmosphere 100°c
Exhaust to atmosphere 100°c
Exhaust to atmosphere 100°c
• With Heat Recovery Units (HRU’s)
Tata Lucknow Waste Heat Recovery Project
HRU
HRU
HRU
Hot Water at 100°c
Heat Exchanger
Return Cold water
Hot Water Generator will not run as oven exhaust heat will be sufficient to maintain the PT tanks temperatures
Total Heat Recovered 318500 Kcal/hr-ED
Total Heat Recovered 254800 Kcal/hr-TC2
Total Heat Recovered 254800 Kcal/hr –TC1
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HRU
HRU
TC-2 Oven (5.6mtr)
TC-1 Oven (5.6 mtr)
ED Oven (5.6 mtr)
Boiler 1
Boiler 2
Return water from PTED at 75'c
Supply water to PTED at 90'c
Hot water at 85'c
Cold water at 75'c
Heat Exchanger
Pipings at 16 mtr
Boiler at 0mtr
HRU
Location of HRU with piping's at 5.6 mtr in TML Lko Paint Shop
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Installation of Heat Exchanger With diverter valve Assy- E.D. Oven
Shell & Tube Heat Exchanger
Motorized Actuated
Diverter valve
Stainless Steel Ducting
Flow Meter
Hot Water O/P
Cold water I/P
Pressure Indicator
Resistance temperature
detectors
DP Water Switch
Flue Gas Back Pressure Switch
Allen Bradley PLC panel
Control Logic L71
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Heat Recovery from ED Oven
TOTAL Savings from 3 Systems = 828100 Kcal /Hr.
Propane Savings of approx. 75 Kg/ Hr.
Total Project Cost= Rupees 1.06 cr