The invention relates to the field of
flue gas
waste heat recovery in
coke making enterprises and
metallurgy enterprises, in particular to a
coke oven
flue gas
waste heat recovery technology. A
waste heat recovery device comprises a main
flue, an auxiliary flue, a steam-water
system, an induced draft fan and a
coke oven
chimney. The waste heat recovery device is characterized in that an
automatic control square
gate valve is arranged on the main flue, an
automatic control round
louver valve is arranged on the auxiliary flue, and the steam-water
system is arranged under a waste heat
recovery boiler. The induced draft fan is arranged on the side of an outlet of the waste heat
recovery boiler and carries out frequency control to control the pressure of the main flue of a
coke oven outlet to be within the range of negative 170-380Pa, and control the flow rate of
flue gas in the auxiliary flue to be 10-15m / s. Compared with the prior art, the
coke oven flue gas waste heat recovery technology has the advantages that through stabilizing of
coke oven collecting flue suction, automatic switching control over a main flue
system and an auxiliary flue system, and reasonable selection of valves and models and device arrangement for the waste heat
recovery boiler, on the premise that
land occupation is reduced and investments are saved,
flue gas waste heat is effectively recovered, and stable, reliable and
continuous operation of a coke oven is ensured.