A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cement kiln bypass exhaust ash resource utilization system and method
The invention relates to a cement kiln bypass exhaust ash resource utilization system and a cement kiln bypass exhaust ash resource utilization method. The cement kiln bypass vent ash resource utilization method comprises the steps that water and bypass vent ash are prepared into slurry; adding a chromium removing agent to reduce hexavalent chromium into trivalent chromium; after the slurry is subjected to solid-liquid separation, directly adopting a separated solid phase 1 for cement production, introducing CO2 into a separated liquid phase 1 to enable calcium ions to generate calcium carbonate precipitate, and synchronously adjusting the pH; after solid-liquid separation of the liquid phase 1, evaporating, concentrating, cooling and crystallizing the liquid phase 2, and separating out potassium salt to obtain a potash fertilizer; mixing the evaporated water with bypass exhaust ash; returning the obtained liquid phase 3 to continue evaporation and concentration; and when the impurity concentration in the obtained liquid phase 3 is too high, the liquid phase 3 is used for being mixed with bypass exhaust ash. The cement kiln bypass vent ash resource utilization method is short in process, high in efficiency and low in cost, and the problem that bypass vent ash is difficult to dispose due to the fact that the content of harmful elements such as potassium, chlorine and sulfur and heavy metal hexavalent chromium is high is solved.
本发明涉及一种水泥窑旁路放风灰资源化利用系统及方法。水泥窑旁路放风灰资源化利用方法，包括：将水与旁路放风灰制成浆液；加入除铬剂，使六价铬还原成三价铬；将浆液固液分离后，分离固相1直接用于水泥生产，分离液相1中通入CO2使钙离子生成碳酸钙沉淀并同步调节pH；液相1固液分离后，将液相2蒸发浓缩并冷却结晶，分离出钾盐制得钾肥；将蒸发出的水用于与旁路放风灰混合；将所得液相3返回继续蒸发浓缩；当所得液相3中杂质浓度过高时，则将液相3用于与旁路放风灰混合。本发明提供的水泥窑旁路放风灰资源化利用方法，流程短、效率高、成本低，解决了旁路放风灰钾、氯、硫等有害元素及重金属六价铬含量高而处置困难的问题。
Cement kiln bypass exhaust ash resource utilization system and method
The invention relates to a cement kiln bypass exhaust ash resource utilization system and a cement kiln bypass exhaust ash resource utilization method. The cement kiln bypass vent ash resource utilization method comprises the steps that water and bypass vent ash are prepared into slurry; adding a chromium removing agent to reduce hexavalent chromium into trivalent chromium; after the slurry is subjected to solid-liquid separation, directly adopting a separated solid phase 1 for cement production, introducing CO2 into a separated liquid phase 1 to enable calcium ions to generate calcium carbonate precipitate, and synchronously adjusting the pH; after solid-liquid separation of the liquid phase 1, evaporating, concentrating, cooling and crystallizing the liquid phase 2, and separating out potassium salt to obtain a potash fertilizer; mixing the evaporated water with bypass exhaust ash; returning the obtained liquid phase 3 to continue evaporation and concentration; and when the impurity concentration in the obtained liquid phase 3 is too high, the liquid phase 3 is used for being mixed with bypass exhaust ash. The cement kiln bypass vent ash resource utilization method is short in process, high in efficiency and low in cost, and the problem that bypass vent ash is difficult to dispose due to the fact that the content of harmful elements such as potassium, chlorine and sulfur and heavy metal hexavalent chromium is high is solved.
本发明涉及一种水泥窑旁路放风灰资源化利用系统及方法。水泥窑旁路放风灰资源化利用方法，包括：将水与旁路放风灰制成浆液；加入除铬剂，使六价铬还原成三价铬；将浆液固液分离后，分离固相1直接用于水泥生产，分离液相1中通入CO2使钙离子生成碳酸钙沉淀并同步调节pH；液相1固液分离后，将液相2蒸发浓缩并冷却结晶，分离出钾盐制得钾肥；将蒸发出的水用于与旁路放风灰混合；将所得液相3返回继续蒸发浓缩；当所得液相3中杂质浓度过高时，则将液相3用于与旁路放风灰混合。本发明提供的水泥窑旁路放风灰资源化利用方法，流程短、效率高、成本低，解决了旁路放风灰钾、氯、硫等有害元素及重金属六价铬含量高而处置困难的问题。
Cement kiln bypass exhaust ash resource utilization system and method
一种水泥窑旁路放风灰资源化利用系统及方法
WANG ZHAOJIA (author) / CAI WENTAO (author) / GU JUN (author) / ZHANG JI (author) / QIN YU (author) / GAO PENGFEI (author) / ZHU YANCHEN (author) / WANG YICHUN (author) / LI QIANG (author) / XING YANGENG (author)
2021-04-06
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
/
C05D
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C
,
Anorganische, nicht von den Unterklassen C05B, C05C umfasste Düngemittel
High-valued utilization method and system for bypass exhaust ash of cement kiln
| European Patent Office | 2024
CHLORINE BYPASS SYSTEM AND METHOD FOR REMOVING CHLORINE FROM CEMENT KILN EXHAUST GAS
| European Patent Office | 2016
| European Patent Office | 2020