How Is a Fly Ash Sample Obtained and Analyzed?
There are four approaches to measuring fly ash content and, therefore, the quality of fuel combustion in a boiler. Each is outlined below. Fly Ash Sampling Method 1. For boiler testing, the most practical way to draw a representative fly ash sample for tuning is by traversing the boiler exit with a high-volume fly ash probe, as shown in Figure 3. The process requires a sample tip directed into the gas stream with a filter canister to collect the fly ash. An aspirator assembly is used on the end of the extension pipe to provide the suction. This usually requires one person and one hour to complete (depending on the duct size and fuel). It is simple in design: All that is needed is to turn the air on, insert the probe, and move it from point to point. 3. The high-volume “in-situ” fly ash sampler. Source: Storm Technologies Inc. Remember that the intent of fly ash sampling is to obtain a representative ash sample from very large ducts. To do this requires that many points be sampled. For
