APH - Testing
Objectives
To determine air preheater performance - air leakage, air temperature rise, flue gas temperature drop and other related parameters like X - ratio, flows and temperatures of air and flue gas based on operating condition. This test shall be conducted to prove Performance Guarantee / to evaluate the present condition of APH as per Power Test Codes of international standards.
Instrument
APH Performance testing shall be carried out using gas analyzer, gas sampling probe, K- Type thermocouple & Thermometer.
Measuring Parameter
Oxygen and CO2 in percentage and temperature in Deg C shall be recorded in all the points at specified intervals for the entire period of the test.
Clean Air Flow Test for Pulverisers
To check the velocity variation among the coal pipes of a pulverizer, to ensure that correct size orifices are installed in coal pipes to establish equal flow in all the coal pipes of each pulverizer. The uniform flow shall be obtained by adjusting the inside diameter of the orifices.
Instrument
Clean air flow test shall be carried out by using monometer, K - Type thermocouple & Thermometer.
Measuring Parameter
Differential pressure, Static pressure and temperature at different depths across the cross section of the pipe.
