The Flow Of Gases In Furnaces

DESIGN OF OPEN-HEARTH FURNACES
TABLE 8—-Continued

227

From
Told

Velocity, m per Second
Time in Seconds

Air and gas passing through the valves
3 50

Entering regenerators .......................
3 00

Passing through regenerators, less than ...........
1 00

Air in regenerator chamber .

5 00

Checkerwork ... . . . ....

3 00

Gas in regenerator chamber .....................

4 00

Checkerwork

3 00

Air and gas parsing through checkerwork, less than. . Air and gas passing through chamber over checker. . Air and gas issuing from the ports ..... .............
2.00 0.50 8.00

Gases in the hearth

2 00

through the regenerator may be gaged by the following record of
the gas pressure below and above the checkerwork published by
E. Juon.

MEASURE OF RESISTANCE TO FLOW THROUGH CHECKERS

Pressure in mm

Pressure in mm

Heat Number
of Water
Heat Number
of Water

Below
Above

Below
Above

156-159
-1-6
H-5
600-602
+ 18
0

160-164
4-5
+5
603-606
+ 18
+1

165-168
+4
+4
607-610
+17
0

169-172
+4
-4-4
611-613
+16
0

173-176
+5
-i-o
614-617
+ 17
0

618-621
+16
+1

The dust deposit is difficult to cope with, as much of it is
extremely fine. It is very difficult to reduce the velocity of the
gas current and throw this dust down in the limited space avail-
able, but a considerable amount of it will be deposited in a well-
designed cinder pocket.