Читать книгу Continuous Emission Monitoring - James A. Jahnke - Страница 11

In the early 1970s, a better way was needed to monitor stack emissions than by manual stack tests. In general, manual methods are conducted by inserting a probe into a stack, extracting a sample, and analyzing the sample in a laboratory, which is a time‐consuming process. Manual source tests also require a degree of preparation, and the coordination and prior scheduling of a test may result in source operations being highly tuned before such testing takes place. Manual test results, therefore, may not necessarily be representative of day‐to‐day emissions. Clearly, for monitoring plant emissions and the performance of pollution control equipment on a more realistic basis, alternative measurement techniques are needed.