Pressurized fluidized-bed combustion part-load behavior. Volume I. Summary report Page: 51 of 122
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Table 4. Stannary of steady-state operating conditions and main results.
"^^Secticn
Vi
V2
l/3
X/4
2/l
2/2
3/l
3/2
36
Duration
h.
15
17
11
4
17
10
20
20
18
Bed tenperature
°F
1460
1630
1405
1635
1400
1400
1630
1385
1650
Fluidising velocity
ft/s
3.7
3.9
3.8
3.9
4.0
4.1
4.1
2.5
4.1
inlet pressure
psig
74.5
74.5
74.5
74.5
74.8
74.7
75.6
75.3
75.5
Bed depth
ft
4.1
8.8
8:7
9.1
5.8
6
4.3
4.2
8.8
Bed density
lb/ft3
48
43
45
44
40
40
38
49
40
Freeboard cooling
No
-
-
-
No
Yes
Yes
Yes
-
Arrangement of cooling
surface (Fig. 1 5)
(a)
(b)
(b)
(b)
(a)
(b)
(b)
(b)
(b)
Canbustor exit tertp.
°F
1510
1530
1375
1555
1460
1330
li40
1155
1515
Total air flow
lb/h
9400
9260
10100
9360
10490
10800
9710
6530
9340
Coal feed rate
lb/h
680
640
740
825
755
730
635
455
600
Dolomite feed rate
lb/h
215
230
255
255
215
215
190
185
210
Ca/S mol ratio
1.65
1.7
1.6
1.55
1.4
1.4
1.6
2.35
2.05
Bed retention
lb/h
195
166
202
101
124
124
64
118
53
Elutriaticn
lb/h
93
95
129
151
209
209
201
121
177
Excess air
%
53
62
57
29
' 57
62
59
50
54
Gas analysis (dry, by volvme)
O- %
7.5
8.2
7.8
4.9
7.8
8.2
8.0
7,2
7.6
%
11.8
11.4
11.5
14.4
11.7
11.2
11.2
12.0
11.6
CO
ppn
-
-
-
90
240
45
220
5
S02
ppm
310
150
310
200
635
615
375
140
55
NO
X
ppm
160
170
230
170
190
210
205
295
190
S03
ppm
3
1.2
3.5
-
-
-
-
-
-
Combustion efficiency %
97.8
99.0
96.7
97.8
97.1
95.8
96.0
95.3
99.0
Sulphur retention
%
86
93%
87
93
71
.71%
79
92
96%
Time constant
s
700
-
-
380
•—
280
450
700
43
D700
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Roberts, A. G.; Pillai, K. K.; Raven, P. & Wood, P. Pressurized fluidized-bed combustion part-load behavior. Volume I. Summary report, report, September 1, 1981; United States. (https://digital.library.unt.edu/ark:/67531/metadc1088075/m1/51/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.