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《广东化工》2020,(4)
针对喷纤废气的特点,本工程采用"干式过滤器+分子筛吸附脱附+催化燃烧"组合工艺对其进行净化处理。废气处理系统进气苯乙烯和非甲烷总烃进气浓度分别约为939.3~1506.6 mg/m~3和2080.0~3338.2 mg/m~3,处理系统出气苯乙烯和非甲烷总烃浓度分别为7.4~16.3 mg/m~3和27.9~44.6 mg/m~3。苯乙烯和非甲烷总烃平均去除效率分别为99.0%和98.7%。满足《大气污染物综合排放标准》(GB16297-1996)和《合成树脂工业污染物排放标准》(GB31572-2015)中的排放限值要求。工程运行结果表明"干式过滤器+分子筛吸附脱附+催化燃烧"组合工艺对喷纤废气具有良好的净化效果,且系统运行时较经济节能。 相似文献
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《广东化工》2020,(2)
针对喷涂行业有机废气的特点,本工程采用"吸附浓缩-催化氧化"组合工艺处理。排放口非甲烷总烃(NMHC)、苯、甲苯和二甲苯浓度分别为74.3、6.20×10~(-2)、0.108和0.164 mg/m~3,排放速率分别为2.18、1.82×10~(-3)、3.19×10~(-3)和4.82×10~(-3)kg/h,去除率达89.5%以上,均满足《工业涂装工序大气污染物排放标准》(DB2146-2018)和《大气污染物综合排放标准》(GB16297-1996)的要求,能耗费用为218140元/年。工程运行结果表明"吸附浓缩-催化氧化"组合工艺对喷涂行业产生的排放大、浓度低的废气具有显著的处理效果和杰出的低能耗特点。 相似文献
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Sung June Cho Min Woong Ryoo Kwang Sup Song Jae Hoon Lee Sung Kyu Kang 《Korean Journal of Chemical Engineering》1999,16(4):478-481
We developed a new process employing catalytic combustion for textile coating aimed at decreasing emissions of volatile organic
compounds (VOCs) and saving energy at the same time. For this purpose, the VOCs are concentrated in a temperature swing adsorption
(TSA) device. A fraction of the concentrated VOCs is completely oxidized on an electrically heated (EHC) system, and its combustion
gas of EHC is supplied as the heating source via heat exchangers. The remaining concentrated VOC is recycled as a renewable
energy source for the drying process to dual-type catalytic burners designed specially to operate with LPG and concentrated
VOC at the same time. This system minimizes the problem of VOC emission and maximizes energy conservation by reusing the VOC,
toluene, from textile coating. 相似文献
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S. V. Zazhigalov P. E. Mikenin S. A. Lopatin D. V. Baranov D. A. Pisarev N. A. Chumakova A. N. Zagoruiko 《Catalysis in Industry》2016,8(3):231-241
New methods are developed for conducting adsorption–catalytic processes to remove volatile organic compounds (VOCs) from exhaust gases at industrial enterprises. New flowsheets are proposed for these processes, in particular a system with localized heating of a part of the catalyst bed to initiate the combustion of adsorbed VOCs, and a system separating a full adsorption–catalytic bed into parallel sections with nonsimultaneous regeneration. Studies combine pilot-scale experiments and mathematical modeling. The flowsheet, in which the initiating heater is located directly in the catalytic adsorbent bed considerably reduces (by at least two orders of magnitude) the energy expenditures on regeneration, both in terms of specific energy consumption for purifying a unit volume of exhaust gases and in terms of the power required for the heater. Separating the bed into several sections allows a severalfold reduction in the maximum concentrations of pollutants and the gas temperature at the outlet of the adsorption–catalytic system during its operation. The proposed methods are characterized by high efficiency of gas purification and low energy consumption, so they can be widely used in protecting the atmosphere against VOC emissions. 相似文献
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建立了甲苯、二甲苯、环己烷催化燃烧反应器的一维拟均相数学模型 ,在MnCuOx/Al2 O3 催化剂上催化燃烧反应动力学采用Langmuir双曲型动力学方程。模拟计算了废气处理量、废气中有机化合物的浓度、床层入口温度对净化率的影响 相似文献
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考虑到挥发性有机物(VOCs)治理技术的复杂性以及实际工程应用中的经济效益,生物联合治理技术成为了一种研究趋势。本文阐述了目前主要的生物联合治理技术,包括紫外光降解技术-生物法、低温等离子体技术-生物法、化学-生物法、吸附-生物法、燃烧-生物法以及生物法组合工艺。总结了生物联合治理技术的研究进展与存在的问题。紫外光、低温等离子体技术以及化学法常作为预处理技术与生物进行联合应用,在提高整体降解效果的同时也会使生物反应器具有更好的运行性能。吸附法、燃烧法通常作为末端处理技术与生物法进行联合治理,以保障废气可以达标排放。生物组合技术也通过将不同生物治理技术相结合形成协同优势使其对于工业废气取得更优的降解效果。文中指出了生物联合技术在废气治理方面是一个有前景的选择,但生物联合治理技术的研究还不够深入,实际应用也不够成熟,因而需要进行进一步的探究。 相似文献
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对O2/CO2燃烧方式下SO2的脱除机理进行了研究.静态实验和动态实验结果表明这种新型燃烧方式有利于降低SO2的排放,SO2脱除存在均相脱硫和多相脱硫的协同作用;新型燃烧方式下高CO2浓度导致燃烧气氛中化学成分不同于传统的空气气氛,SO2与燃烧气氛中存在的其他组分反应,生成硫的不同形态产物,SO2只是其中的一种产物形态,导致SO2总量排放减少;同时 O2/CO2燃烧气氛使燃煤中硫的氧化程度减弱;燃煤中本身所含脱硫剂存在优化的微观结构,该种结构有利于脱硫和对底灰中硫的吸附,也导致SO2的排放量降低;CHEMKIN动力学计算结果进一步表征了以上机理. 相似文献