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    • 19. 发明申请
    • Process and system for calcination of high solids kraft paper pulp mill lime mud
    • 用于煅烧高固体牛皮纸浆泥浆的方法和系统
    • US20090114352A1
    • 2009-05-07
    • US11895403
    • 2007-08-24
    • Robert A. Rossi
    • Robert A. Rossi
    • D21C11/06D21F1/66
    • C04B2/06C04B2/08C04B2/10Y02P20/129Y02P40/42Y02P40/45C04B2/005
    • The invention features methods and systems for calcining wet calcium carbonate lime mud produced in a re-causticizing manufacturing operation, for instance, Kraft pulp mill lime mud (“lime mud”) and converting it to re-burned lime by (a) feeding wet lime mud obtained from a re-causticizing manufacturing process into a flash dryer and then feeding the dried lime mud into a bubbling fluid bed calciner thermally linked by moving media heat transfer (MMHT) utilizing solid particulate media to a circulating fluid bed combustor wherein the MMHT provides heat input for calcination and drying; (b) recycling the media being from said calciner to said combustor wherein said combustor receives mill WWTP sludge, or precipitated lignins, or biomass, or NCGs as fuels to re-heat the solid particulate media; and (c) recovering calcined “soft-burned” lime mud from the fluid bed calciner. Steam and heated boiler feed-water are also generated and exported to the mill's steam distribution and generation system as well as hot process water for use in the mill's boiler house and manufacturing operation. The system for calcining calcium carbonate lime mud produced from a re-causticizing manufacturing operation and converting it to re-burned lime comprises a calciner and a combustor linked by a moving media heat transfer MMHT system or apparatus. The MMHT system or apparatus thermally links separate fluid bed combustion (exothermic) and calcination (endothermic) stages. The system further comprises a flash dryer or spray dryer that utilizes exhausted heat from the calcination stage.
    • 本发明的特征在于用于煅烧在再苛化制造操作中生产的湿碳酸钙石灰泥的方法和系统,例如牛皮纸浆厂石灰泥(“石灰泥”),并将其转化为再煅烧的石灰(a) 将从再苛化制造过程获得的石灰泥浆进入闪蒸干燥器,然后将干燥的石灰泥浆送入通过使用固体颗粒介质的介质传热(MMHT)热循环到循环流化床燃烧器热连接的鼓泡流化床煅烧器中,其中MMHT 提供煅烧和干燥的热量输入; (b)将来自所述煅烧器的介质再循环到所述燃烧器,其中所述燃烧器接收磨机污水处理厂污泥或沉淀的木质素或生物质或NCG作为燃料以重新加热固体颗粒介质; 和(c)从流化床煅烧炉回收煅烧的“软烧”石灰泥。 蒸汽和加热锅炉给水也被生产出口到工厂的蒸汽分配和发电系统以及用于轧机锅炉房和制造操作的热处理水。 用于煅烧由再苛化制造操作产生并将其转化为再烧石灰的碳酸钙石灰泥的系统包括煅烧炉和通过移动介质传热MMHT系统或设备连接的燃烧器。 MMHT系统或设备热连接单独的流化床燃烧(放热)和煅烧(吸热)阶段。 该系统还包括使用来自煅烧阶段的排出的热量的闪蒸干燥器或喷雾干燥器。