| OCR Text |
Show TEST PROJECT DESCRIPrION The test project provided for 3 test runs each at 6 sets of test conditions (see Table 1). The test project was designed to examine the effects of ESP temperature, sorbent injection conditions, and mixing chamber temperature on the concentrations of various pollutants. All but three tests were run at normal combustion conditions as defined by temperatures in the ignition and mixing chambers. The primary test variable was the ESP inlet temperature, which was controlled by the amount of water sprayed into the conditioning chamber. Tests were run at three nominal ESP inlet temperatures: high [575 or 550°F (302 or 288°C)], medium [400°F (204°C)], and low [300°F (149°C)]. High ESP inlet temperature tests were conducted for normal and poor combustion conditions (low mixing chamber temperature). The poor combustion condition tests were run at a slightly lower ESP inlet temperature [550 vs. 575°F (288 vs. 302°C)] than the good combustion condition tests to avoid ESP operating problems encountered at 575°F (302°C). Medium ESP inlet temperature tests were run with and without furnace injection (FI) of limestone (CaCO 3). Low ESP inlet temperature tests were conducted with FI of limestone and duct injection (D!) of hydrated lime [Ca(OH)2J. No tests were run at low ESP inlet temperatures without sorbent injection because operation without acid gas control would have invalidated the ESP warranty. In addition to combustion and flue gas cleaning process conditions, the following measurements were made: • CDD and CDF - sampled at the mixing chamber exit, at the ESP inlet, and in the stack • Chlorobenzenes (CB), chlorophenols (CP), polychlorinated biphenyls (PCB), and polycyclic aromatic hydrocarbons (PAR) - sampled at the ESP inlet and in the stack • Total particulate matter - sampled at the ESP inlet and in the stack • Trace metals - sampled at the ESP inlet and in the stack • Hydrogen chloride (HC]) - sampled at the ESP inlet (three runs) and in the stack • Sulfur dioxide (SO~ - sampled at the ESP inlet and in the stack • Carbon monoxide (CO) and total hydrocarbons (THC) - measured in the stack • Oxygen (02) and carbon dioxide (C02) - measured at the ESP inlet and in the stack • Nitrogen oxides (NOx) - measured in the stack. 5 |
