Thermal-detoxification equipment and utilization of heat from cokebattery smokestack gases

Abstract

Kotloenergoprom Stock Co. has developed new technology of thermal rendering harmless and
waste recovering of heat of flue gases from coke-oven batteries in one unit.
In 2000, Kotloenergoprom Stock Co. had executed the design of the first in the world Unit of
thermal rendering harmless and waste recovering of heat of flue gases from the coke-oven battery
No. l installed in "Zaporozhkoks" (65 furnaces, H = 7.0 m, V = 41.6 m3
).
The complex "Coke-oven battery - Unit" operates in the special mode using automatic process
control system. Introduction the above Unit in 2002 had ensured: decrease of NOx contents in
flue gases from coke-oven battery in 1.5+2 times and CO on 90+ I 00 % with providing
international norms of ejections; rebuming solid carbon inclusions and combustible components
(H2, CH4, CmHn) in flue gases; stabilization of hydraulic mode of coke-oven battery operation;
non-shock putting coke-oven battery into operation directly to chimney stack in case of scheduled
or accident stopping the Unit; waste recovery of heat of flue gases from coke-oven battery in
quantity up to 6.0 Gkal/h; producing up to 85 tph of steam with energetic parameters at additional
combustion of coke-oven gas (without building new chimney stack), that lets to produce
additionally 6 MWt of electric power;
Standard scheme of producing heat and electric power at by-product coke plants applying usual
boiler houses and power stations is irrational. The more effective is to apply the scheme of
producing heat and electric power with simultaneous rendering harmless and waste recovery of
heat of flue gases from coke-oven batteries in the special Units using existing chimney stacks of
coke-oven batteries.
Cost of building the Unit is not more than cost of usual boiler house or power station with equal
capacity.