Milliken Clean Coal Technology Demonstration Project Data Report for the Design Coal Tests of the S-h-u Scrubber at Milliken
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چکیده
Tests of the Saarberg-Halter Umwelttechnik GmbH (S-H-U) flue gas desulfurization (FGD) process were performed November 12-20, 1998. while burning the design coal at the NYSEG Milliken Station Unit No. 1. The objectives of the test program using the design coal were to demonstrate the effect of cocurrent and countercurrent liquid-to-gas ratio on SO, removal and scrubber operability. Measurements included SO2 removal and scrubber pressure drop. SO, removal ranged from 85.6% using only five spray headers to 95.1% using all seven spray headers with formic acid (nominally 800 ppm). All but one of the tests were performed at a pH of 4.1 fO.l. During one test, the pH was 3.9. Less SO? was removed during this test (85.4% at pH 3.9) compared to a duplicate test using the same spray header configuration (91.5% at pH 4.1). Mass transfer increased with increasing liquid-to-gas ratio (UG); in tests at similar L/G, mass transfer was dependent on the choice of the operating spray configuration. Pressure drop through the scrubber was substantially influenced by changes in the countercurrent L/G, whereas cocurrent L/G did not have a significant effect on the scrubber pressure drop. Earlier tests were performed on Unit 2from October 11 to November 21.1995, while the unit was firing a 1.6% sulfur coal and on Unit 1 from April 21 to May 1, 1998, while the unit was firing a 4% sulfur coal.
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