WO2022074552 (A1)

Method and system for bypass gas handling in a cement kiln system

(22) 05.10.2021

(43) 14.04.2022

(57) The invention relates to a bypass system for bypass gas handling in a cement kiln system in a plant for manufacture of cement clinker, said plant for manufacture of cement clinker comprising a preheater, a kiln and a clinker cooler, said bypass system comprises a duct connection to extract bypass gas, a quench chamber to quench the bypass gas, a heat exchanger to cool the quenched bypass gas, a recirculation fan to recirculate the cooled bypass gas back to the quench chamber, at least one cyclone placed in a recirculation circuit to separate a part of the bypass dust for removal from the recirculation circuit, and one or more tapping points to remove recirculating gas from the recirculation circuit, wherein the bypass gas is quenched in the quench chamber and further cooled with a heat exchanger and then recirculated to the quench chamber to be used as quench coolant.

(71) FLSmidth A/S (DK)

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