Ammonia Injection Grid (AIG) Adjustment and SCR De-NOx System Performance Test:
- Receiving the trust of National Research Institute of Mechanical Engineering (Main Contractor), Chugai Technos performed the AIG adjustment and performance testing of the SCR system for unit S2.
- 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;
