BP33 - Optimize steam system
| Address: Nhon Trach 2 Industrial Park, Nhon Trach District, Dong Nai Province | |
| Project Summary: In response to the energy efficiency program of Adidas brand, a textile and dyeing enterprise in Dong Nai province has carried out the steam system optimization. The program objective is to reduce energy costs and greenhouse gas (GHG) emission. | |
| Year of implementation: 2018 | |
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Status before implementation The system of boiler and thermal oil boiler is the major energy consumption part of the plant. Before the project implementation, the plant consumed 5,426,810 kgs of coal/first six months of 2018 for the boilers (two boilers with capacity of 10 TPH and 20 TPH) and a thermal oil boiler. The boiler’s flue gas temperature was quite high (about 196.40C). This increased the heat loss through the flue gas. This excessive heat can be used to preheat the feed water to the boiler, thereby saving a large amount of boiler fuel.
The feedwater economizer of the 20 TPH boiler was out of order In addition, the boilers' blowdown is done twice every shift (at the beginning and end of the shift, about 15 seconds each times). The conductivity according to the measurement result was really low at 275 ppm only (compared to the boiler blowdown standard of 3000 ppm). This increased the heat loss through the boiler blowdown. |
Result The factory already repaired the feedwater economizer of the 20 TPH boiler and considered installing an additional feedwater economizer to the 10 TPH boiler in the future.
The feedwater economizer has been working properly In addition, the factory has used a TDS electrical conductive pen (available but not yet used) and controlled the boiler blowdown.
Conductive pen |
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Status before implementation The system of boiler and thermal oil boiler is the major energy consumption part of the plant. Before the project implementation, the plant consumed 5,426,810 kgs of coal/first six months of 2018 for the boilers (two boilers with capacity of 10 TPH and 20 TPH) and a thermal oil boiler. The boiler’s flue gas temperature was quite high (about 196.40C). This increased the heat loss through the flue gas. This excessive heat can be used to preheat the feed water to the boiler, thereby saving a large amount of boiler fuel.
The feedwater economizer of the 20 TPH boiler was out of order In addition, the boilers' blowdown is done twice every shift (at the beginning and end of the shift, about 15 seconds each times). The conductivity according to the measurement result was really low at 275 ppm only (compared to the boiler blowdown standard of 3000 ppm). This increased the heat loss through the boiler blowdown. |
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Result The factory already repaired the feedwater economizer of the 20 TPH boiler and considered installing an additional feedwater economizer to the 10 TPH boiler in the future.
The feedwater economizer has been working properly In addition, the factory has used a TDS electrical conductive pen (available but not yet used) and controlled the boiler blowdown.
Conductive pen |
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| Result of the project: | |
| Total investment costs: | Negligible (included in annual maintenance costs) |
| Power saving: | 8,576,042 MJ/year |
| Cost savings: | VND 760.5 Million |
| Payback time: | Instantly |
