Environmental Engineering Reference
In-Depth Information
3. Pilot air blower
a. Number of pilot air blowers: 1
b. Air capacity: 30 /min
c. Discharge pressure: 700 mmH
2
O (6.86 kPa)
4. Exhaust gas induced fan
m
3
a. Number of induced fans: 1
b. Air capacity: 2200 m
3
/min (at 150˚C)
c. Discharge pressure: 1100 mmH
2
O (10.8 kPa)
5. Combustion air piping
Piping is necessary between the combustion air blower and the regenerative burners
for the supply of combustion air to the burners. Air at room temperature flows
through this piping.
6. Exhaust gas piping
Piping is also necessary for the low temperature exhaust gas from the regenerative
burners to the exhaust stack via the exhaust gas induced fan. Combustion exhaust
gas at 150 to 200˚C flows through this piping.
7. Fuel piping
Piping from the COG intake point to the respective burners is also necessary.
8. Gas flue
A gas flue is necessary for high temperature exhaust gas discharged from the bottom
section of the furnace-charging end.
5.4.1.3 Attachments
Comparison of performance between reheating furnaces is shown in
Table 5.20
.
a. Specifications and performance (shown in
Table 5.20
)
b. Heat-balance calculation table (shown in
Table 5.21
)
c. Combustion facility capacity (shown in
Table 5.22
)
d. Temperature rise curves and distribution of discharging temperature
1. Temperature rise curves
(
Figure 5.65
)
2. Distribution of discharging temperature
(
Figure 5.66
)
These specifications relate to the new installation of a reheating furnace using
regenerative burners. The typical case of modification may include installation of a
regenerative burner in a noncombustion zone in a currently operated reheating
furnace and replacing the burner in the preheating zone with a regenerative burner
for the purpose of saving energy and/or improving the heating capacity.
This section lists the major items to be considered prior to such modification
work. The items listed here may be insufficient or exceed requirements, depending
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