Environmental Engineering Reference
In-Depth Information
Input Book
Excel book 1
Input data 1
Excel book 2
Excel book 3
Temperature
simulator
Output Book
Calculation 1
Input data 1
Input data 3
Calculation
result 1
Calculation 2
Input data 2
Input data 3
Calculation
result 2
Calculation 3
Input data 3
Input data 3
Calculation
result 3
Report, etc.
FIGURE 5.37
Flow of input and output data.
5.41. The specifications of these two types of furnaces are shown in
Table 5.12
,
and
the increasing temperature curves of slab are shown in
Figures 5.42
and
5.43
.
In
Table 5.13
, comparison of the heat balances for the two types of furnaces for slabs
is presented. A comparison of the results of 285 ton/h for slabs is shown in
Figures
5.2.7 E
FFECT
OF
F
UEL
C
ALORIFIC
V
ALUE
ON
THE
F
UEL
C
ONSUMPTION
OF
R
EHEATING
F
URNACES
The Mix Gas produced by mixing coke oven gas (COG) and blast furnace gas (BFG)
has a low calorific value and generates more exhaust gas (see
Figure 5.47
)
, resulting
in a low heat recovery rate. This is the reason the effect of calorific value of fuels
on the heat recovery rates of regenerative heating exchangers was studied. Based
on the results of this research, the way in which calorific value of fuels affected the
fuel consumption of a continuous reheating furnace was studied. In combination
with calorific values, the effects of several factors were also examined. These were
the effect of heat recovery rates, of discharging temperatures, of the processing rate
by ton/h, and of slab thickness. Comparison was made of the effect of charging
temperatures. Other factors were the effect of heat recovery rates in the case of the
charging temperatures of 300 and 600˚C.
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