Xintai Power Plant
Jizhong Energy
Customer：
**** Power Co. Ltd.
Flue Gas Treatment Procedure：
SCR+ESP+FGD
CEMS system：
SDL SCS-900
CEMS question:
SO2 large deviation during whole CEMS calibration;Large volume condensed water in pipeline and cooler;
Few ammonia salt deposit;
Can’t pass whole CEMS calibration.Solution：
After onsite survey, recommend PreGASS-9500 precondition system without change any situation of existing CEMS, effectively remove the moisture and ammonia in the sample gas, prevent the loss of SO2 and the ammonium salt deposit, improve the response time, meet the national standard requirements, and solve customer problems.
Data comparison: CEMS SO2 test range 0-100mg/m3
| Item | SO2 standard gas Con. | T90 (s) | SO2 reading (mg/m3) | Error of whole CEMS calibration% |
| Before PreGASS modification | 36.0mg/m³ | >>200 | 20.0mg/m³ | 10.6% |
| 77.8mg/m³ | >>200 | 59.2mg/m³ | 12.4% | |
| 134.4mg/m³ | >>200 | 110.0mg/m³ | 16.2% | |
| After PreGASS modification | 36.0mg/m³ | 130 | 36.2mg/m³ | 0.13% |
| 77.8mg/m³ | 123 | 79.0mg/m³ | 0.8% | |
| 134.4g/m³ | 125 | 134.0mg/m³ | 0.26% |
Result & Performance:
15 days from onsite survey & installation & commissioning acceptance, T90<130s, deviation error of whole CEMS calibration <±2.5%.
