Development of advanced, dry, SO{sub x}/NO{sub x} emission control technologies for high-sulfur coal. Final report, April 1, 1993--December 31, 1994 Page: 18 of 91
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
Phase 5 - LIDS
Originally, the goal of this test was simply to extend the data base for this technology,
established in a 1991 test co-sponsored by OCDO, to lower T. and higher SO2 removal made possible
by technology advances. However, initial tests were unable to duplicate 1991 results, and additional
tests were conducted to determine the cause of the differences. To help fund these tests an additional
$35,000 was contributed by B&W. The early problems with this phase necessitated a reorganization
of the remaining schedule. OCDO approved the changes to Phases 5, 4B, 6, and 7 in a letter dated
April 28, 1994.
Five tests were originally planned for this phase, but because of the problem mentioned above,
31 LIDS tests were completed, including four in Phase 6. A solution to the problem was found and,
eventually, all goals were met or exceeded
Phase 6 - A+LIDS
As mentioned above, the matrix for this phase was reduced from 8 tests to 4 tests. The
change was approved by OCDO in the letter. In all, 13 tests were completed that included baseline
tests and four additional LIDS tests at the same conditions but without ammonia injection. All goals
were met or exceeded.
Phase 7 - Regenerable MgO-Based Dry Scrubber
The main objective of this phase was to investigate the feasibility of this untried technology.
Originally, three tests were planned. This was later reduced to one test and approved by OCDO in the
4/28/94 letter. The number of tests was later increased to five, because of the savings possible by
conducting the regeneration portion of the test, a proven commercial process, at bench-scale instead of
pilot-scale. However, more time was required to complete the scrubber tests because of unforeseen
problems with slurry handling. Since the scrubbing system only achieved marginal performance, the
technology was deemed not feasible at this stage of development, and the subsequent regeneration tests
were not pursued. OCDO was notified of these changes, and approved them on 12/20/94.
2.2 TECHNICAL DISCUSSION
All tests were conducted in B&W's pilot-scale furnace known as the Small Boiler Simulator
(SBS). The SBS is PC-fired and rated at 5 million Btu/hr. Other test equipment included a 5 ft.
diameter, vertical, down-flow dry scrubber with dual fluid atomization, and a pulse-jet baghouse.
Appendix A is a detailed facility description. A typical test series included start-up, a test period, and
shutdown. Start-up involved operating the furnace for several hours to reach thermal equilibrium.
Equilibrium was determined by monitoring several TC's and TC grids at various locations in the gas
path. Start-up also included subsystem shakedown, analyzer calibration and slurry preparation. For
phases that involved furnace sorbent injection, start-up was followed by collecting baseline data to
determine background furnace SO2 concentration before sorbent injection. This value was later used to
calculate furnace SO2 removal. This procedure was necessary because high temperatures make it
difficult to sample flue gas ahead of sorbent injection. A typical test period lasted between 3 and 12
hours depending on how fast steady state was attained. Tests with recycle required longer periods to
reach steady state. Two 55 gallon drums were used to make slurry from waste ash. A portion of the
ash from the baghouse hoppers was metered to a drum and mixed with water. The resulting slurry2-2
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Amrhein, G.T. Development of advanced, dry, SO{sub x}/NO{sub x} emission control technologies for high-sulfur coal. Final report, April 1, 1993--December 31, 1994, report, December 23, 1994; United States. (https://digital.library.unt.edu/ark:/67531/metadc783090/m1/18/?rotate=270: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.