Ammonia Injection Grid (AIG) Tuning and De-NOx SCR System Performance Test:
- Receiving the trust of VCAPITAL Investment and Technology JSC (Main Contractor), Chugai Technos performed the AIG adjustment and performance testing of the SCR system for Unit 1.
- Using simple equipment system, easy to assemble, meet the ducts both horizontal and vertical, difficult to manipulate location, tight space. Sampling and monitoring equipment comply with Japanese’s JIS standards.
- Scope of Work:
- AIG adjustment: Surveying valve opening rate, outlet NOx distribution; Adjustment of the injection valves; Confirmation of NOx and ammonia slip distribution 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 contents:
- 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;
