Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Process method for preparing SO2 and coupling production of cement clinker by decomposing phosphogypsum with iron-containing solid waste
The invention discloses a process method for preparing SO2 and coupling production of cement clinker by decomposing ardealite with iron-containing solid waste, which comprises the following steps: feeding a mixed material of ardealite, coal and Fe3O4-containing solid waste into a circulating fluidized bed reactor, reducing the ardealite into SO2 at high temperature and generating a large amount of dicalcium ferrite; flue gas enters the reburning chamber after passing through the two cyclone separators and then enters the waste heat recovery boiler for heat exchange, and the flue gas subjected to heat exchange enters the acid making unit after passing through the high-temperature dust remover. Materials from a fluidized bed slag discharge port, a return feeder outlet and a secondary cyclone separator outlet are directly fed into the rotary kiln, and limestone, clay and coal are added into the rotary kiln at the same time. The rotary kiln is heated to the high temperature through waste heat of a fluidized bed solid-phase product and coal combustion heat release, and high-temperature clinker enters a deslagging waste heat recovery boiler for waste heat recovery. According to the method, the technological process is improved, the cement clinker is prepared by coupling SO2 prepared by reducing phosphogypsum with the Fe3O4-containing solid waste for the first time, and meanwhile, energy consumption is reduced through waste heat recovery.
本发明公开了一种利用含铁固废分解磷石膏制备SO2耦合生产水泥熟料的工艺方法，包括：将磷石膏、煤和含Fe3O4固废的混合物料送入循环流化床反应器内，磷石膏在高温下被还原为SO2并产生大量的铁酸二钙。烟气经两个旋风分离器后进入燃烬室，然后进入余热回收锅炉进行换热，换热后的烟气经高温除尘器后进入制酸单元。来自流化床排渣口、返料器出口和二级旋风分离器出口物料直接送入回转窑，石灰石、粘土和煤被同时加入回转窑。利用流化床固相产物的余热和煤燃烧放热将回转窑加热至高温，高温熟料进入排渣余热回收锅炉回收余热。本发明改进工艺流程，首次采用含Fe3O4固废还原磷石膏制备SO2耦合制备水泥熟料，同时，通过余热回收降低能耗。
Process method for preparing SO2 and coupling production of cement clinker by decomposing phosphogypsum with iron-containing solid waste
The invention discloses a process method for preparing SO2 and coupling production of cement clinker by decomposing ardealite with iron-containing solid waste, which comprises the following steps: feeding a mixed material of ardealite, coal and Fe3O4-containing solid waste into a circulating fluidized bed reactor, reducing the ardealite into SO2 at high temperature and generating a large amount of dicalcium ferrite; flue gas enters the reburning chamber after passing through the two cyclone separators and then enters the waste heat recovery boiler for heat exchange, and the flue gas subjected to heat exchange enters the acid making unit after passing through the high-temperature dust remover. Materials from a fluidized bed slag discharge port, a return feeder outlet and a secondary cyclone separator outlet are directly fed into the rotary kiln, and limestone, clay and coal are added into the rotary kiln at the same time. The rotary kiln is heated to the high temperature through waste heat of a fluidized bed solid-phase product and coal combustion heat release, and high-temperature clinker enters a deslagging waste heat recovery boiler for waste heat recovery. According to the method, the technological process is improved, the cement clinker is prepared by coupling SO2 prepared by reducing phosphogypsum with the Fe3O4-containing solid waste for the first time, and meanwhile, energy consumption is reduced through waste heat recovery.
本发明公开了一种利用含铁固废分解磷石膏制备SO2耦合生产水泥熟料的工艺方法，包括：将磷石膏、煤和含Fe3O4固废的混合物料送入循环流化床反应器内，磷石膏在高温下被还原为SO2并产生大量的铁酸二钙。烟气经两个旋风分离器后进入燃烬室，然后进入余热回收锅炉进行换热，换热后的烟气经高温除尘器后进入制酸单元。来自流化床排渣口、返料器出口和二级旋风分离器出口物料直接送入回转窑，石灰石、粘土和煤被同时加入回转窑。利用流化床固相产物的余热和煤燃烧放热将回转窑加热至高温，高温熟料进入排渣余热回收锅炉回收余热。本发明改进工艺流程，首次采用含Fe3O4固废还原磷石膏制备SO2耦合制备水泥熟料，同时，通过余热回收降低能耗。
Process method for preparing SO2 and coupling production of cement clinker by decomposing phosphogypsum with iron-containing solid waste
一种利用含铁固废分解磷石膏制备SO2耦合生产水泥熟料的工艺方法
WANG QINHUI (Autor:in) / MA DONG (Autor:in) / XIE GUILIN (Autor:in) / LUO ZHONGYANG (Autor:in)
02.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
Production process method for preparing SO2 coupling cement clinker by decomposing phosphogypsum
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