COMBUSTION GAS EXTRACTION PROBE AND METHOD FOR OPERATING THE SAME

• Main Authors: HAMADA KOKI, KITAZAWA TAKEMOTO
• Format: Patent
• Language: English; Japanese
• Published: 22.09.2023
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; OVENS; REFRACTORIES; RETORTS; SLAG; TREATMENT OF NATURAL STONE; WEAPONS

To provide a combustion gas extraction probe capable of sufficiently cooling extraction gas even when an extraction rate is increased, and capable of performing operation for maintaining predetermined chlorine removal efficiency, and a method for operating the same.SOLUTION: A probe 2 comprises: an inner pipe 21 that extracts part of combustion gas G1 from a kiln 1; and a plurality of discharge ports 25 that are bored in the inner pipe 21, and each discharge cold air C in a direction perpendicular to a flow direction of extraction gas G2 extracted by the inner pipe 21 and in a center direction of the flow of the extraction gas G2. The discharge ports 25 discharge the cold air C so that a ratio (MC/MG) of a momentum MC of the cold air C per mouth of the discharge port 25 to a momentum MG of the extraction gas G2 satisfies 1.2 to 4.0, and a value (m-1) obtained by dividing a ratio (VC/VG) of a wind speed VC of the cold air C to a wind speed VG of the extraction gas G2 by an inner diameter D of the inner pipe 21 satisfies 1.5 to 3.5.SELECTED DRAWING: Figure 3 【課題】抽気率を増強した場合にも抽気ガスを十分に冷却でき、所定の塩素除去効率を維持した運転を可能とする燃焼ガス抽気プローブ及びその運転方法を提供する。【解決手段】プローブ２は、キルン１からの燃焼ガスＧ１の一部を抽気する内管２１と、内管２１に穿設され、内管２１が抽気した抽気ガスＧ２の流れ方向に対して直角方向、かつ抽気ガスＧ２の流れの中心方向に冷風Ｃを各々吐出する複数の吐出口２５と、を備え、吐出口２５は、抽気ガスＧ２の運動量ＭＧに対する吐出口２５一口当たりの冷風Ｃの運動量ＭＣの比（ＭＣ／ＭＧ）が１．２～４．０を満たし、かつ抽気ガスＧ２の風速ＶＧに対する冷風Ｃの風速ＶＣの比（ＶＣ／ＶＧ）を内管２１の内径Ｄで除した値（ｍ－１）が１．５～３．５を満たすように、冷風Ｃを吐出する。【選択図】図３