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    Method and system for reheating flue gas using waste heat to maintain dry chimney stack operation
    1.
    发明授权
    Method and system for reheating flue gas using waste heat to maintain dry chimney stack operation 有权

    公开(公告)号：US09657943B2

    公开(公告)日：2017-05-23

    申请号：US14757316

    申请日：2015-12-16

    申请人： GREAT RIVER ENERGY

    发明人： Jared D. Pozarnsky

    IPC分类号： F23J15/00 ,  F23J15/08 ,  F28C3/02

    CPC分类号： F23J15/08 ,  F23J2215/20 ,  F23J2217/50 ,  F28C3/02 ,  F28D21/001 ,  Y02P20/124 ,  Y02P80/156

    摘要： Flue gas is a by-product of many energy and industrial plants and is typically emitted through a chimney stack. If the flue gas temperature in the chimney stack drops below the flue gas dew point, condensation of water vapor and acid gases ensues. These gases are very corrosive for chimney stacks designed to operate in a dry condition. The Flue Gas Reheat System of the present invention continuously and proactively manages flue gas chimney stack temperatures above the dew point in order to optimize emission control and effectuate energy efficiency improvements in industrial plants. Waste heat is harvested from the exterior surfaces of existing steam and pollution control equipment through conduction, convection and radiation. This heat is transferred to a working fluid. The working fluid is then directly mixed with the flue gas prior to the flue gas entering the chimney stack to raise the temperature of (or re-heat) the flue gas above its dew point to maintain a dry chimney stack condition. The use of residual or waste heat from throughout the plant and the minimal equipment required to harvest the waste heat reduces the operating cost and improves the overall reliability of the system. This method is useful in many industries, including electric power generation plants and other energy intensive process industries that seek emission control and various boiler and fuel energy efficiency improvements, many of which improvements result in a reduction in normal chimney stack temperature.

    Method and system for reheating flue gas using waste heat to maintain dry chimney stack operation
    3.
    发明申请
    Method and system for reheating flue gas using waste heat to maintain dry chimney stack operation 有权
    使用废热再热烟气的方法和系统，以保持干烟囱堆垛操作

    公开(公告)号：US20160169510A1

    公开(公告)日：2016-06-16

    申请号：US14757316

    申请日：2015-12-16

    申请人： GREAT RIVER ENERGY

    发明人： Jared D. Pozarnsky

    IPC分类号： F23J15/08 ,  F28C3/02

    CPC分类号： F23J15/08 ,  F23J2215/20 ,  F23J2217/50 ,  F28C3/02 ,  F28D21/001 ,  Y02P20/124 ,  Y02P80/156

    摘要： Flue gas is a by-product of many energy and industrial plants and is typically emitted through a chimney stack. If the flue gas temperature in the chimney stack drops below the flue gas dew point, condensation of water vapor and acid gases ensues. These gases are very corrosive for chimney stacks designed to operate in a dry condition. The Flue Gas Reheat System of the present invention continuously and proactively manages flue gas chimney stack temperatures above the dew point in order to optimize emission control and effectuate energy efficiency improvements in industrial plants. Waste heat is harvested from the exterior surfaces of existing steam and pollution control equipment through conduction, convection and radiation. This heat is transferred to a working fluid. The working fluid is then directly mixed with the flue gas prior to the flue gas entering the chimney stack to raise the temperature of (or re-heat) the flue gas above its dew point to maintain a dry chimney stack condition. The use of residual or waste heat from throughout the plant and the minimal equipment required to harvest the waste heat reduces the operating cost and improves the overall reliability of the system. This method is useful in many industries, including electric power generation plants and other energy intensive process industries that seek emission control and various boiler and fuel energy efficiency improvements, many of which improvements result in a reduction in normal chimney stack temperature.

    摘要翻译： 烟气是许多能源和工业厂房的副产品，通常通过烟囱堆放出来。 如果烟囱中的烟气温度低于烟气露点，则会导致水蒸汽与酸性气体的冷凝。 这些气体对于设计​​为在干燥条件下工作的烟囱堆叠是非常腐蚀性的。 本发明的烟气再热系统连续主动地管理高于露点的烟道烟囱烟囱温度，以便优化排放控制并实现工业设备的能源效率改进。 废热通过传导，对流和辐射从现有蒸汽和污染控制设备的外表面收获。 这种热量被传递到工作流体。 然后在烟道气进入烟囱之前，将工作流体与烟道气直接混合，以将烟道气（或再加热）升高到其露点以上以保持干烟囱堆叠状态。 使用来自整个工厂的残余或余热以及收集废热所需的最少设备降低了运行成本并提高了系统的整体可靠性。 这种方法在许多行业中是有用的，其中包括寻求排放控制和各种锅炉和燃料能源效率改进的发电厂和其他能源密集型过程工业，其中许多改进导致正常烟囱堆温度的降低。