Proof of concept testing of an integrated dry injection system for SO2/NOx control Page: 2 of 19
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INTRODUCTION
The parametric test program was carried out in the time period
covered by this report. Three coals and four sorbents were used in
the testing. S02 removal, NOx removal, and precipitator performance
were all investigated. The test matrix is given in Table 1.
ACTIVITY
Testing in October concentrated on S02 removal resulting from
hydrate injection and precipitator baseline performance. Typical
results for operation on October 30 are shown in Figure 1. Hydrate
injection at 1030 deg F for various Ca/S mole ratios are shown. It
is seen that increasing hydrate mole ratios yield decreasing outlet
S02 concentrations. Also shown is the precipitator exit opacity,
and it can be seen that increasing hydrate injection rates lead to
larger opacities.
Figure 2 reduces the data of Figure 1 to show S02 removal as a
function of Ca/S ratio. It should be pointed out that subsequent
adjustments to the hydrate injection nozzles have improved
utilization by about 5% over that shown in Figue 2. Maximum
achievable hydrate utilization has been about 30% at a Ca/S of 2.
This utilization has been reached with optimum placements of either
the vertical pipe injector system, or the horizontal injector
system, see Figures 3 & 4.
Testing in November concentrated on S02 and NOx removal resulting
from combined hydrate and bicarbonate injection and the subsequent
electrostatic precipitator impacts. Typical results for operation
on November 14 are shown in Figure 5. This Figure shows S02'M- ., III,
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Helfritch, D.J.; Bortz, S.J. (Research-Cottrell, Inc., Somerville, NJ (United States)) & Beittel, R. (Riley Stoker Corp., Worcester, MA (United States)). Proof of concept testing of an integrated dry injection system for SO2/NOx control, report, January 1, 1991; United States. (https://digital.library.unt.edu/ark:/67531/metadc1052092/m1/2/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.