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首页> 外文会议>International Conference on Fluidized Bed Combustion >UTILIZATION OF AFBC WASTE BY-PRODUCT AS A FGD SORBENT FOR CIRCULATING DRY SCRUBBING
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UTILIZATION OF AFBC WASTE BY-PRODUCT AS A FGD SORBENT FOR CIRCULATING DRY SCRUBBING

机译：利用AFBC废物副产物作为FGD吸附剂，用于循环干擦洗

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The Tennessee Valley Authority (TVA) is currently interested in finding applications for the spent bed sorbent by-product generated at their 160 MW AFBC facility. Calcium utilization in this by-product is relatively low, having an available alkalinity from 20 to 40 wt%, as Ca(OH){sub}2, thus, creating a potential disposal problem. It is possible that this byproduct material could be used as a supplemental sorbent in the Gas Suspension Absorption (GSA) reactor located at the TVA's Center for Emissions Research in Paducah, Kentucky. GSA technology is a semi-dry, lime based, FGD process that utilizes a circulating bed arrangement for contacting sorbent with SO{sub}2-laden flue gas under "coolside" conditions. In a project co-funded by the TVA and the Center for Applied Energy Research (CAER), a pilot-scale fluid bed reactor was modified to simulate a generic circulating dry scrubber (CDS) process similar to the GSA technology. The purpose of this program was to investigate the feasibility of using AFBC waste in conjunction with hydrated lime as a sorbent for the CDS process. An AFBC by-product from the 160 MW plant was pulverized to liberate CaO and slaked along with a fresh lime feedstock. CDS sulfur capture was evaluated with and without chloride addition to the sorbent slurry. Control tests using lime-only feeds were also conducted. In general, the sulfur capture reactivity of the sorbent which included slaked lime/AFBC material was found to be equivalent to or greater than that containing only fresh lime. With a nominal Ca/S ratio of 1.3 (1.0 with fresh lime, 0.3 slaked by-product), the reactor sulfur capture varied between 65 and 90% depending on the specific test conditions. An effective fuel chloride of 0.2 wt% was found to enhance the sulfur capture by as much as 8 to 12%.
机译：田纳西州谷权威（TVA）目前有兴趣于在160 MW AFBC设施中产生的花床吸附剂副产品的应用。该副产物中的钙利用率相对较低，具有20％至40wt％的可用碱度，如Ca（OH）{Sub} 2，从而产生潜在的处置问题。该副产品材料可能用作位于肯塔基州帕迪桑那州帕迪桑的排放研究中心的气体悬浮吸收（GSA）反应器中的辅助吸附剂。 GSA技术是半干燥的石灰基础FGD工艺，其利用循环床布置，用于使吸附剂与“沉肠”条件下的{Sub} 2-载带烟气接触。在由TVA和应用能源研究中心（CAER）共同资助的项目中，修改了一张试验型流化床反应器，以模拟类似于GSA技术的通用循环干燥洗涤器（CDS）过程。该计划的目的是调查使用AFBC废物与水合石灰一起使用的可行性，作为CDS过程的吸附剂。来自160兆瓦植物的AFBC副产物粉碎以释放CaO并与新鲜的石灰原料一起拆下。 CDS硫捕获在吸附剂浆料中使用和不含氯化物进行评估。还进行了使用石灰饲料的控制测试。通常，发现包括液体酸橙/ AFBC材料的吸附剂的硫捕获反应性相当于或大于仅含有新鲜石灰的吸附剂。标称Ca / S比为1.3（1.0带新鲜石灰，0.3纤巧的副产物），反应器硫捕获根据特定的试验条件，在65和90％之间变化。发现0.2wt％的有效燃料氯化物以增强硫捕获多达8-12％。

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