12.8t/h Sintering Machine Waste Heat Boiler Project and Its Technical Parameters
2023-10-19
320m2 sintering area of iron and steel plant with 12.8 tons sintering machine waste heat boiler project
1. Meteorological conditions
- Average temperature in summer: 23.5℃
- Multi-year extreme maximum temperature: 41.2°C
- Winter average: -11.7℃
- Multi-year extreme minimum temperature: -33.1°C
- Annual average: 6.7℃
- Annual average wind speed: 3m/s
- Average annual rainfall: 466.1mm
- Dominant wind direction and frequency: SW17%
- Daily average relative humidity of the coldest month: 44%
- Daily average relative humidity of the hottest month: 73%
- Average atmospheric pressure in summer: 94: KPa
- Average atmospheric pressure in winter: 95.5: KPa
- Annual average atmospheric pressure: 95: Kpa
2. Sintering Process System Parameters
Table 1 Design parameters of main equipment of 320m2 sintering machine
| project | unit | parameter | Remark | |
| Sintering Machine | Effective area | ㎡ | 324 | |
| quantity | tower | 1 | ||
| Number of working days | d/a | ≥330 | ||
| Utilization factor | t/(m2.h) | ≥1.15 | ||
Table 2 Parameters of hot air resources used by the large flue of 320m2 sintering machine
| Operating conditions | 17# | 18# | 19# | 20# | twenty one# | Average temperature (°C) |
| Minimum (°C) | 385 | 365 | 425 | 405 | 395 | 395 |
| Normal (°C) | 400 | 420 | 440 | 420 | 410 | 410 |
| Maximum (°C) | 415 | 435 | 455 | 435 | 425 | 425 |
| The flow rate of each dust control branch pipe m3/h | ||||||
| Operating conditions | 17# | 18# | 19# | 20# | twenty one# | total |
| Single flue branch flow | 39750 | 39750 | 39750 | 39750 | 39750 | 198750 |
| Double flue branch pipe flow | 79500 | 79500 | 79500 | 79500 | 79500 | 397500 |
3. Main design parameters of waste heat recovery device:
| serial number | project | unit | value |
| 1 | superheated steam pressure | MPa | 1.6 (gauge pressure) |
| 2 | superheated steam temperature | ℃ | 320 |
| 3 | Rated evaporation | t/h | 12.8 (factory accounting) |
| 4 | Feed water temperature | ℃ | 151 |
| 5 | Exhaust gas volume | Nm3/h | 170000 (factory accounting) |
| 6 | Flue gas side resistance loss | Pa | ≤350 |
| 7 | boiler efficiency | % | (factory accounting) |
| 8 | Boiler evaporation area | m2 | (factory accounting) |
| 9 | Exhaust smoke temperature after waste heat recovery in large flue | ℃ | ≥125 |