Ammonia Injection Grid (AIG) Adjustment and SCR De-NOx System Performance Test:
- With the trust from Dai Tam Son Joint Stock Company (the main contractor), Chugai Technos has undertaken the task of adjusting the NH3 spray grid (AIG) and checking the performance of the NOx reduction system (SCR) for unit S1.
- Using simple equipment system, easy to disassemble, meet the ducts both horizontal and vertical, difficult to operation, tight space. Sampling and monitoring equipment comply with JIS standards.
- Work content:
- AIG adjustment: Surveying valve opening rate, outlet NOx distribution; Adjustment of the injection valves; Confirmation of distribution of NOx and ammonia slip after adjustment.
- SCR performance test: Exhaust gas monitoring, differential pressure measurement, ammonia consumption survey.
- Monitoring parameters: Temperature, pressure, velovity, flow rate, moisture content, gas composition (O2, CO2 and N2), SO2, SO3, NH3 concentration; continuous monitoring NOx/O2 by gas analyzer.
- Report content:
- Valve opening rate, NOx distribution coefficient before and after adjustment;
- The basic exhaust gas parameters;
- NOx/O2 concentration;
- NOx removal efficiency;
- Ammonia slip;
- NH3/NOx molar ratio;
- Conversion rate SO2 to SO3;
- Distribution diagram: flow velocity, temperature, NOx/O2 , NH3 concentration;
- Comparison of actual measurement results and DCS data;
- Data analysis, general evaluation and giving improvement plan;
