(1) Representation of fuel components and conversion of components. The gaseous fuel component is classified into a wet component or a dry component representation. Gas analysis of coal, including water wet components represented, are calculated in% by volume. The dry ingredients do not include moisture in the gas. The moisture in the gas exists in a saturated water vapor state, and the amount varies depending on the gas temperature.
In order to eliminate the influence of temperature on the gas composition (mainly affecting its water and gas volume), the gas analysis shows the gas composition. Various books and documents describe the dry components of gas. In order to reflect the real situation of the gas when it is used, the combustion calculation is carried out using the gas wet component. Calculated coefficient K for dry gas to wet gas:
Example: The dry composition of coke oven gas used in ignition of a sintering plant is as follows:
CH 4 22.08%, H 2 61.49%, CO 7%, CO 2 3.6%, N 2 3.3%, O 2 0.2%, C n H m 2.4%, 20 ° C when used, and H 2 O wet = 2.3%. So K is 0.977.
Its wet composition is:
CH 4 = 22.08% × 0.977 = 21.57%
H 2 = 61.42% × 0.977 = 60.02%
CO=7%×0.977=6.84%
N 2 =3.3%×0.977=3.22%
O 2 = 0.2% × 0.977 = 0.19%
C n H m =2.4%×0.977=2.34%
CO 2 =3.6%×0.977=3.52%
H 2 O = 2.3%
Σ 湿 =100%
The composition of the liquid is expressed in mass%, and is often expressed as a supply component, a dry component, and a combustible component (chemically, there is also an organic component representation).
The supply component is a component expression method including all the components, the dry component is a component expression not including water, and the combustible component is a component expression not including moisture and ash. The conversion is as follows:
Since weather conditions affect the moisture content of the fuel, transportation and storage conditions affect the fuel ash content, so the supply components of liquid and solid fuel vary depending on external conditions. In order to eliminate the influence of external conditions, combustible components are given after elemental analysis, and combustible components are described in various books and literature.
In order to reflect the real situation of the fuel at the time of use, the combustion calculation is carried out using the components of the liquid and solid fuel.
For example: the combustible composition of heavy oil is: C burning = 87.52%, H burning = 10.74%, O burning = 0.5I%, N burning = 0.5I%, S burning = 0.72%. In industrial analysis, A dry = 0.21%, W Use =2.0% to determine the ingredients for this heavy oil.
The supply parts of each composition are:
With C = 85.60
H = 10.50% with
O with = 0.5%
N with = 0.5%
S with = 0.7%
A with =0.2%
W = 2.0% by
A = Σ 100.00%
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