TYPICAL ANALYSES OF BY-PRODUCT
COKE OVEN GAS
+----------------------------------------------+
|+------+-------------------------------------+|
||CO_{2}| O |CO |CH_{4}| H | N |B.t.u. per||
|| | | | | | |Cubic Foot||
|+------+-----+---+------+----+----+----------+|
|| 0.75 |Trace|6.0|28.15 |53.0|12.1| 505 ||
|| 2.00 |Trace|3.2|18.80 |57.2|18.0| 399 ||
|| 3.20 | 0.4 |6.3|29.60 |41.6|16.1| 551 ||
|| 0.80 | 1.6 |4.9|28.40 |54.2|10.1| 460 ||
|+------+-----+---+------+----+----+----------+|
+----------------------------------------------+
The essential difference in burning the two fuels is the pressure under
which it reaches the gas burner. Where this is ordinarily from 4 to 8
ounces in the case of natural gas, it is approximately 4 inches of water
in the case of by-product coke oven gas. This necessitates the use of
larger gas openings in the burners for the latter class of fuel than for
the former.
By-product coke oven gas comes to the burners saturated with moisture
and provision should be made for the blowing out of water of
condensation. This gas too, carries a large proportion of tar and
hydrocarbons which form a deposit in the burners and provision should be
made for cleaning this out. This is best accomplished by an attachment
which permits the blowing out of the burners by steam.