Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for calcining active lime by use of mixed gas in lime sleeve kiln
A method for calcining active lime by the use of mixed gas in a lime sleeve kiln comprises the following steps: different consumption amounts of gas is respectively introduced into upper and lower combustion chambers of a combustion system of the lime sleeve kiln; blast-furnace gas is blown into the upper combustion chamber to keep oxygen free combustion and make combusted gas reach the temperature range of 1000-1100 DEG C required by limestone decomposition; and coke oven gas is blown into lower nozzles of the lower combustion chamber, the lower nozzles are multi-row structural layered combustors, a part of fuel in the layered combustors undergoes premixed combustion at a normal air-fuel ratio, high temperature generated by combustion makes an area where the air nearby is relatively thin satisfy ignition conditions and thereby ignition is carried out layer by layer, the combustion status of flameless oxidation is formed by combining recirculation flow of flue gas, and temperature is controlled within the range of 1150-1200 DEG C. According to the method, there is no need to build a gas mixing and pressuring station, and the purposes of accurately controlling lime calcination temperature, guaranteeing heat balance and reducing production costs of lime can be achieved.
Method for calcining active lime by use of mixed gas in lime sleeve kiln
A method for calcining active lime by the use of mixed gas in a lime sleeve kiln comprises the following steps: different consumption amounts of gas is respectively introduced into upper and lower combustion chambers of a combustion system of the lime sleeve kiln; blast-furnace gas is blown into the upper combustion chamber to keep oxygen free combustion and make combusted gas reach the temperature range of 1000-1100 DEG C required by limestone decomposition; and coke oven gas is blown into lower nozzles of the lower combustion chamber, the lower nozzles are multi-row structural layered combustors, a part of fuel in the layered combustors undergoes premixed combustion at a normal air-fuel ratio, high temperature generated by combustion makes an area where the air nearby is relatively thin satisfy ignition conditions and thereby ignition is carried out layer by layer, the combustion status of flameless oxidation is formed by combining recirculation flow of flue gas, and temperature is controlled within the range of 1150-1200 DEG C. According to the method, there is no need to build a gas mixing and pressuring station, and the purposes of accurately controlling lime calcination temperature, guaranteeing heat balance and reducing production costs of lime can be achieved.
Method for calcining active lime by use of mixed gas in lime sleeve kiln
JIA FAQIANG (Autor:in) / CHEN JIANGLIN (Autor:in) / QU SIMIN (Autor:in) / LIU CHANGXIA (Autor:in)
27.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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