ASME PTC 34:2007 pdf free download.Waste Combustors With Energy Recovery.
The pressures selected for calibration should span the range of the anticipated values expected during the test. Th pressure should be recorded at each point while increasing pressure and again while decreasing pressure.
4-3.1.3 Flue Gas Composition. The analyzers used to measure oxygen. carbon dioxide, and carbon monoxide should be calibrated immediately prior to a test and calibration checked fo drift immediately following a test. These calibrations should be performed using certified calibration gases for zero, full span. and mid-point. Calibration gases shall be EPA Protocol I, gases, on a calibrated analyzer. Additionally, no calibration gas should be used when the pressure in the cylinder is lower than 100 psi. If the analyzer is calibrated on one range and the measurement during the test is performed on another, a post-test caLibration check should be performed on the second range.
4.3.2 flue Gas Analysis
4-3.2.1 Dry FLue Gases. The 02 and CO2 measurement should be performed using an extractive sampling system from a stationary grid. If it is known that the waste comIustor generates large quantities of carbon monoxide, an analyzer should be provided and calibrated for carbon monoxide. Since most waste combustors operate with carbon monoxide emissions less than 100 ppm dry volume corrected to 7% oxygen, the impact of the efficiency loss due to carbon monoxide in the flue gas will be less than 0.05% (about 2 flu/lb for 5,000 mu/lb waste). Therefore, in these cases, the carbon monoxide loss may be estimated or igiored. Nitrogen is determined by difference.
4-3.2.2 Water Vapor. Water vapor in flue gas measurements should be performed according to EPA Method 4, which uses a single-point probe. The probe shall traverse a grid layout similar to the dry flue gas grid. Although a stationary grid would reduce the systematic error of the test, use of a stationary grid is not considered practical for this application.
4-3.3 flow Weighting
The average temperature of flue ga.s flowing in a duct is needed to determine the loss due to energy in the gas. The average temperature is obtained from measurenwnts of the gas temperature at multiple points distributed across the duct cross-section. This Code does not require that flow weighted average temperatures. oxygen. carbon dioxide, or carbon monoxide content Lw used. If mass flow weighting is used, refer to PtC 4 for calculations.
4-3.4 Frequency of Measurements
Because of fuel control sYstem tuning, and other factors, variations in operational parameters are inevitable. To minimize uncertainty, more measurements are taken during the test to reduce random errors in the data collected.
ASME PTC 34:2007 pdf free download
