公开(公告)号：US09464848B2

公开(公告)日：2016-10-11

申请号：US14010381

申请日：2013-08-26

Applicant: Southern Company

Inventor： Guohai Liu ,  Pannalal Vimalchand ,  Xiaofeng Guan ,  WanWang Peng

IPC: B01J7/00 ,  F28D15/00 ,  C10J3/86 ,  F28D13/00 ,  C10K3/00 ,  F28D21/00

CPC classification number: F28D13/00 ,  C10J3/86 ,  C10J2300/093 ,  C10J2300/1884 ,  C10J2300/1892 ,  C10K3/005 ,  F28D15/00 ,  F28D21/0001 ,  F28D2021/0075 ,  Y02E20/16 ,  Y02E20/18

Abstract: A method and apparatus for cooling hot gas streams in the temperature range 800° C. to 1600° C. using multi-stage circulating fluid bed (CFB) coolers is disclosed. The invention relates to cooling the hot syngas from coal gasifiers in which the hot syngas entrains substances that foul, erode and corrode heat transfer surfaces upon contact in conventional coolers. The hot syngas is cooled by extracting and indirectly transferring heat to heat transfer surfaces with circulating inert solid particles in CFB syngas coolers. The CFB syngas coolers are staged to facilitate generation of steam at multiple conditions and hot boiler feed water that are necessary for power generation in an IGCC process. The multi-stage syngas cooler can include internally circulating fluid bed coolers, externally circulating fluid bed coolers and hybrid coolers that incorporate features of both internally and externally circulating fluid bed coolers. Higher process efficiencies can be realized as the invention can handle hot syngas from various types of gasifiers without the need for a less efficient precooling step.

Abstract translation: 公开了一种使用多级循环流化床（CFB）冷却器在800℃至1600℃的温度范围内冷却热气流的方法和装置。 本发明涉及从煤气化炉中冷却热合成气，其中热合成气在常规冷却器接触时夹带污染，腐蚀和腐蚀传热表面的物质。 通过在CFB合成气冷却器中循环惰性固体颗粒提取并间接传递热量至传热表面来冷却热合成气。 CFB合成气冷却器分段，以便在IGCC工艺中发电所需的多种条件下生产蒸汽和热锅炉给水。 多级合成气冷却器可以包括内部循环流化床冷却器，外部循环流化床冷却器和混合冷却器，其结合内部和外部循环流化床冷却器的特征。 可以实现更高的工艺效率，因为本发明可以处理来自各种类型的气化器的热合成气，而不需要较不有效的预冷却步骤。

公开(公告)号：US20130145934A1

公开(公告)日：2013-06-13

申请号：US13712491

申请日：2012-12-12

Applicant: The Southern Company

Inventor： Guohai Liu ,  Pannalal Vimalchand ,  WanWang Peng ,  Alexander Bonsu

IPC: B01D53/14

CPC classification number: B01D53/1425 ,  B01D53/1475 ,  B01D53/18 ,  B01D53/62 ,  B01D53/96 ,  B01D2257/504 ,  B01D2258/0283 ,  Y02C10/04 ,  Y02C10/06

Abstract: A regenerator that can handle rich loaded chemical solvent containing precipitated absorption reaction products is disclosed. The invention is particularly suitable for separating CO2 from large gas streams that are typical of power plant processes. The internally circulating liquid stream in the regenerator (ICLS regenerator) rapidly heats-up the in-coming rich solvent stream in a downcomer standpipe as well as decreases the overall concentration of CO2 in the mixed stream. Both these actions lead to dissolution of precipitates. Any remaining precipitate further dissolves as heat is transferred to the mixed solution with an inverted bayonet tube heat exchanger in the riser portion of the regenerator. The evolving CO2 bubbles in the riser portion of the regenerator lead to substantial gas hold-up and the large density difference between the solutions in the downcomer standpipe and riser portions promotes internal circulation of the liquid stream in the regenerator. As minor amounts of solvent components present in the exit gas stream are condensed and returned back to the regenerator, pure CO2 gas stream exits the disclosed regenerator and condenser system.

Abstract translation: 公开了一种能够处理含有沉淀的吸收反应产物的富集化学溶剂的再生器。 本发明特别适用于从典型的发电厂工艺的大气流中分离出二氧化碳。 再生器（ICLS再生器）中的内部循环液体流快速加热下降管立管中的未来富溶剂流，并降低混合流中CO 2的总浓度。 这些行为都导致沉淀物的溶解。 任何剩余的沉淀物进一步溶解，因为在再生器的提升管部分中用反转的卡口式热交换器将热量转移到混合溶液中。 在再生器的提升管部分中演变的二氧化碳气泡导致显着的气体滞留，并且降液管立管和提升管部分中的溶液之间的大的密度差促进了再生器中液体流的内部循环。 由于存在于出口气流中的少量溶剂组分被冷凝并返回到再生器中，纯的CO 2气流离开所公开的再生器和冷凝器系统。