Client: Shannxi Changqing Energy & Chemical Co. Ltd
Location: Shannxi, China
Project type: Boiler Denitrification SCR
Capacity: 3 x 180 t/hr boilers
Time of completion: April, 2014
In this project, SCR technology has been applied to the denitrification of flue gas of 3×180 t/hr pulverized coal-fired boilers. For each SCR reactor corresponding to each boiler and that’s located between the economizer and the air reheater, plate-type catalyst module has been selected with the 2+1 configuration (two layers of catalyst modules were installed initially, and space has been reserved for the third layer which would be installed after the initial two layers are partially consumed). 99.6% anhydrous ammonia has been selected as denitrification sorbent. It is gasified in the evaporation tank before diluted with make-up air and injected into the flue gas by the ammonia injection grid.
Technical Specs
|
Inlet flue gas |
|
| Flow rate（Dry basis, actual O2） | 3×182,600 Nm3/hr |
| Temperature | 390 ℃ |
| NOx content（Standard condition, wet basis, actual O2） | 500 mg/ Nm3 |
| Particulate matter content（Standard condition, wet basis, actual O2） | 32.3 g/ Nm3 |
|
SCR performance |
|
| Denitrification efficiency | ≥ 80％ (as required) |
| NOx emission (dry basis，6%O2) | ≤ 100 mg/Nm3 |
| Ammonia slip (dry basis，6%O2) | ≤ 2.5 mg/Nm3 |
| SO2/SO3 conversion | ≤ 1% |
| Pressure drop (two layers of catalyst modules) | ≤ 800 Pa |
| Design life |
30 years |
