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首页> 外文会议>Air Waste Management Association Annual Conference Exhibition >Concomitant Adsorption and Desorption for Dampening Fluctuations in Organic Vapors Concentrations for Use Upstream of Biofilters
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Concomitant Adsorption and Desorption for Dampening Fluctuations in Organic Vapors Concentrations for Use Upstream of Biofilters

机译：用于在生物膜上游使用的有机蒸汽浓度的阻尼波动的伴随吸附和解吸

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Fluctuations in organic vapor concentrations make it challenging for biofilters and thermal oxidizers to operate efficiently and economically. For example, too high of an organic vapor concentration is toxic while too low of a concentration causes starvation of microorganisms in a biofilter, which results in reduced organic vapor removal efficiency. A new system, referred to as Concomitant Adsorption-Desorption (CAD), is described here that can stabilize the concentration of organic vapors upstream of a biofilter or a thermal oxidizer. CAD controls the desorption of organic vapor from an adsorbent by controlling the temperature of the adsorbent to force the concentration of the desorbed organic vapor to match a user-defined set-point concentration. CAD was used here to experimentally stabilize the concentration of methyl ethyl ketone (MEK) in an air stream using activated carbon fiber cloth adsorbent with microwave (μCAD) and electrical resistive (eCAD) heating. The μCAD system's inlet MEK concentration switched between 5 and 1,020 ppmv every 10 min, while its concomitant outlet concentration was stabilized at 500 ± 2 ppmv. The set-point for the adsorber's outlet concentration was 500 ppmv. The normalized average absolute error (NAAE) between the measured and set-point MEK concentrations was 0.3%. The inlet MEK concentration for the eCAD system switched between 0 ppmv and 530 ppmv every 10 to 20 min for dry and for humid air streams. The NAAE values for the dry and humid gas streams were 0.4% and 0.3%, respectively. eCAD is able to readily stabilize its outlet organic vapor concentration while letting water vapor pass through the vessel. These results are exciting because they indicate that CAD treatment of organic vapor laden air streams upstream of biofilters and thermal oxidizers will allow those devices to operate more effectively due to the stabilization of their inlet organic vapor concentration in dry or moist air streams.^
机译：有机蒸汽浓度的波动使得生物过滤器和热氧化剂具有有效和经济地运行的挑战。例如，过高的有机蒸气浓度是毒性，同时浓度的浓度过低导致生物过滤器中的微生物饥饿，这导致有机蒸汽去除效率降低。此处描述了一种新的系统，称为伴随吸附 - 解吸（CAD），其可以稳定生物滤波器或热氧化剂上游的有机蒸汽的浓度。通过控制吸附剂的温度来控制吸附剂的温度来控制来自吸附剂的有机蒸汽的解吸，以迫使解吸的有机蒸汽的浓度匹配用户定义的设定点浓度。这里使用CAD以通过微波（μCAD）和电阻（ECAD）加热，通过具有活性炭纤维布吸附剂在线稳定在空气流中的甲基乙基酮（MEK）的浓度。 μCAD系统的入口MEK浓度每10分钟在5到1,020ppmV之间切换，而其伴随的出口浓度在500±2 ppmV下稳定。吸附器出口浓度的设定点为500 ppmv。测量和设定点MEK浓度之间的归一化平均绝对误差（NAAE）为0.3％。 ECAD系统的入口MEK浓度每10至20分钟在0 ppmv和530ppmv之间切换，以干燥和潮湿的空气流。干燥和潮湿气流的NaaE值分别为0.4％和0.3％。 ECAD能够容易地稳定其出口有机蒸气浓度，同时使水蒸气通过容器。这些结果是令人兴奋的，因为它们表明，由于在干燥或潮湿空气流中的入口有机蒸气浓度稳定，因此将允许这些器件更有效地操作的有机蒸气升起的空气流。^

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