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GYPSUM CALCINATION FURNACE AND GYPSUM CALCINATION METHOD
PROBLEM TO BE SOLVED: To prevent generation of uneven calcination in calcined gypsum and reduce fuel consumption in a calcination furnace by improving fluidity of a raw material gypsum sedimentation layer in the furnace.SOLUTION: A gypsum calcination furnace (1) comprises a furnace body (3-7) including a furnace inner wall surface having a circular or annular shape in a plan view, and a combustion tube (2) arranged at a center of the furnace body. Raw material gypsum (M) in the furnace is calcined or dried by a high-temperature gas jet flow (Hg) jetted from a bottom of the combustion tube. The calcination furnace has a plurality of fixed blades (10) arranged at angular intervals in the circumferential direction and in an outer peripheral region of a lower end part of the combustion tube. Adjacent fixed blades form a flow passage (P) of the raw material gypsum which deflects an upward flow of the high-temperature gas, jetted to a furnace bottom part, in the radially outward direction and the circumferential direction of the combustion tube. Deflection of fluids of the high-temperature gas and the raw material gypsum energizes the raw material gypsum near the furnace inner wall surface in the circumferential direction of the furnace body or assists the circumferential movement.SELECTED DRAWING: Figure 4
【課題】炉内の原料石膏堆積層の流動性を改善し、焼成石膏の「焼きむら」発生を防止するとともに、焼成炉の燃料消費量を削減する。【解決手段】石膏焼成炉(1)は、平面視円形又は環状の炉内壁面を有する炉体(3-7)と、炉体の中心部に配置された燃焼管(2)とを備え、燃焼管の下部から噴出する高温ガス噴流(Hg)によって炉内の原料石膏(M)を焼成し又は乾燥させる。焼成炉は、燃焼管の下端部外周域に角度間隔を隔てて周方向に配列した複数の固定羽根(10)を有する。隣り合う固定羽根は、炉底部に噴流した高温ガスの上昇流を燃焼管の径方向外方且つ周方向に偏向する原料石膏の流動路(P)を形成する。高温ガス及び原料石膏の流動体の偏向により、炉内壁面近傍の原料石膏は炉体の周方向に付勢され、或いは、その周方向の運動が助勢される。【選択図】図４
GYPSUM CALCINATION FURNACE AND GYPSUM CALCINATION METHOD
PROBLEM TO BE SOLVED: To prevent generation of uneven calcination in calcined gypsum and reduce fuel consumption in a calcination furnace by improving fluidity of a raw material gypsum sedimentation layer in the furnace.SOLUTION: A gypsum calcination furnace (1) comprises a furnace body (3-7) including a furnace inner wall surface having a circular or annular shape in a plan view, and a combustion tube (2) arranged at a center of the furnace body. Raw material gypsum (M) in the furnace is calcined or dried by a high-temperature gas jet flow (Hg) jetted from a bottom of the combustion tube. The calcination furnace has a plurality of fixed blades (10) arranged at angular intervals in the circumferential direction and in an outer peripheral region of a lower end part of the combustion tube. Adjacent fixed blades form a flow passage (P) of the raw material gypsum which deflects an upward flow of the high-temperature gas, jetted to a furnace bottom part, in the radially outward direction and the circumferential direction of the combustion tube. Deflection of fluids of the high-temperature gas and the raw material gypsum energizes the raw material gypsum near the furnace inner wall surface in the circumferential direction of the furnace body or assists the circumferential movement.SELECTED DRAWING: Figure 4
【課題】炉内の原料石膏堆積層の流動性を改善し、焼成石膏の「焼きむら」発生を防止するとともに、焼成炉の燃料消費量を削減する。【解決手段】石膏焼成炉(1)は、平面視円形又は環状の炉内壁面を有する炉体(3-7)と、炉体の中心部に配置された燃焼管(2)とを備え、燃焼管の下部から噴出する高温ガス噴流(Hg)によって炉内の原料石膏(M)を焼成し又は乾燥させる。焼成炉は、燃焼管の下端部外周域に角度間隔を隔てて周方向に配列した複数の固定羽根(10)を有する。隣り合う固定羽根は、炉底部に噴流した高温ガスの上昇流を燃焼管の径方向外方且つ周方向に偏向する原料石膏の流動路(P)を形成する。高温ガス及び原料石膏の流動体の偏向により、炉内壁面近傍の原料石膏は炉体の周方向に付勢され、或いは、その周方向の運動が助勢される。【選択図】図４
GYPSUM CALCINATION FURNACE AND GYPSUM CALCINATION METHOD
石膏焼成炉及び石膏焼成方法
NIIMI KATSUMI (author) / TAKENAKA TAKESHI (author) / NIDO KOJI (author)
2016-09-01
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
GYPSUM CALCINATION FURNACE AND GYPSUM CALCINATION METHOD
| European Patent Office | 2016