CHLORINE BYPASS EXTRACTION DEVICE, CHLORINE BYPASS FACILITY, CEMENT CLINKER PRODUCTION FACILITY, AND PRODUCTION METHOD OF CEMENT CLINKER

To provide an extraction device capable of reducing accumulation and adhesion of dust, and stabilizing operations of a chlorine bypass facility.SOLUTION: An extraction device 90 of a chlorine bypass has an extraction pipe 12 which is coupled to a kiln tail part 52 and/or rising duct 51 of a cement kiln and extracts a kiln exhaust gas 60 from an extraction hole 12a. The extraction pipe 12 has: a large diameter part 10 introducing a coolant gas 62 along a peripheral direction and mixes a kiln exhaust gas 60 and the coolant gas 62; a small diameter part 11 which has an inner diameter smaller than that of the large diameter part 10, is provided concentrically to the large diameter part 10 on an opposite side to the exhaustion hole 12a of the large diameter part 10, and derives an extraction gas 63 including the kiln exhaust gas 60 and the coolant gas 62; and a diameter reduction part 15 for narrowing a channel of the large diameter part 10 between the large diameter part 10 and the small diameter part 11.SELECTED DRAWING: Figure 2 【課題】ダストの堆積及び付着を低減することが可能であり、塩素バイパス設備の運転を安定化することが可能な抽気装置を提供すること。【解決手段】塩素バイパスの抽気装置９０は、セメントキルンの窯尻５２及び／又はライジングダクト５１に連結され、抽気口１２ａからキルン排ガス６０を抽気する抽気管１２を備える。抽気管１２は、周方向に沿うように冷却ガス６２を導入し、キルン排ガス６０と冷却ガス６２とを混合する大径部１０と、大径部１０よりも小さい内径を有し、大径部１０の抽気口１２ａ側とは反対側に大径部１０と同心となるように設けられ、キルン排ガス６０と冷却ガス６２を含む抽気ガス６３を導出する小径部１１と、大径部１０と小径部１１との間に大径部１０の流路を絞る縮径部１５を備える。【選択図】図２