Advanced development of a pressurized ash agglomerating fluidized-bed coal gasification system. Quarterly progress report, April 1-June 30, 1982 Page: 80 of 105
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COLD FLOW SCALEUP FACILITY
5.1 EXPERIMENTAL ACTIVITY - TEST TP-M004
TP-M004, a CO2 tracer gas test with the 16-inch diameter single air tube,
was conducted in the CFSF from March 29 to May 21, 1982. The objective of
this test was to measure the gas exchange between different regions of the
bed. During the test, C02 was injected individually into the solids feed
line and the air tube. Gas samples were taken at different locations within
the model with traversing sampling probes to map the C02 concentration and
thereby determine gas history/mixing.
Test instrumentation included specially designed C02 probes, shown in Figure
5-1, made from heavy wall 0.75-inch tubing with a 200-mesh screen placed on
one end to prevent the bed material from migrating to the gas analyzer. The
C02 concentrations were measured by a thermal conductivity cell (GOW MAC
"Gas Master" Model 20-150) gas analyzer and recorded on a chart recorder. A
typical C02 trace is shown in Figure 5-2.
Upon completion of the test on May 21, approximately one-fourth of the planned
set points were achieved, with sufficient data 'obtained to determine the gas
mixing through the bed with C02 injected into the coaxial feed line. These
data included C02 measurements at eight set points, six probe elevations,
and two grid locations. C02 concentration was measured at approximately
2-inch intervals across the CFSF bed diameter for each of the above
conditions, and 1140 data points were obtained.
Another series of data, although not as extensive as above, was obtained with
the C02 injected into the air tube.
Set point flow parameters for this test are summarized in Table 5-1. During
this test series, the air tube height was maintained at the bottom of the
conical grid, and aeration through the conical grid was restricted to the top
seLuii (see Figure 5-3).
5.2 DATA ANALYSIS
5.2.1 TEST TP-M002
Data analysis of test TP-M002-2 was completed and the conclusions are
summarized here. The jet penetration depth data from TP-M002-2 are
predictable within +25 percent by employing the equation developed. The
results are presented in Table 5-2. There is conclusive experimental evidence
showing that substantial amounts of gas leak trom the bubble to the emulsion
phase during bubble formation, as shown in Figure 5-4. This is especially
true when the bed is less than minimally fluidized.
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Advanced development of a pressurized ash agglomerating fluidized-bed coal gasification system. Quarterly progress report, April 1-June 30, 1982, report, October 21, 1982; United States. (https://digital.library.unt.edu/ark:/67531/metadc1058542/m1/80/: accessed May 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.