共查询到15条相似文献,搜索用时 93 毫秒
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生产lt黄磷要排放250Nm^3-3000Nm^3尾气,经过尾气净化和精制、甲醇合成和甲醇催化脱水等工艺,可利用黄磷尾气制取二甲醚。以年产5千t的黄磷厂为例,每年可减少1280万Nm^3尾气排放,从而减少3.63t硫、3.47t磷和0.14t氟排入空中,同时可生产二甲醚3500t、甲醇500t。本方法技术上可行,经济效益良好,环境效益显著。 相似文献
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改性活性炭吸附净化黄磷尾气中的H2S 总被引:1,自引:0,他引:1
研究了以Cu^2+离子活性溶液制备改性活性炭吸附净化黄磷尾气中H2S的相关问题,考察了改性活性炭制备过程中的浸渍液浓度、干燥温度和焙烧温度的影响,以及温度和氧含量对吸附的影响;并对空白活性炭、改性活性炭吸附前后做SEM表征。研究结果表明,浸渍液浓度0.05mol/L、干燥温度120℃、焙烧温度250℃为改性活性炭制备的最佳条件;吸附反应阶段较适宜的温度为95℃,氧含量为1%;结合扫描电镜初步表明,改性后的活性炭S容量增加,吸附效果明显。 相似文献
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金属改性碳脱除黄磷尾气中的H_2S和PH_3 总被引:1,自引:0,他引:1
为综合利用黄磷尾气中的CO,通过钢瓶配气及气相色谱GC-14C测定的方法,研究了Cu2+和某金属离子Mn+改性碳脱除黄磷尾气中的PH3和H2S的相关问题。结果表明:实验范围内最佳反应条件为反应温度95℃,浸渍液浓度0.3mol/L,粒径3.5mm,氧含量1%,焙烧温度300℃和气体流量0.4L/min;再生方案对含磷物质的再生效果基本可行,对含硫杂质的再生不甚理想;工厂中实际黄磷尾气实验证明该净化方法实用可行;建立的模型可以很好地预测金属改性碳上吸附催化反应后PH3和H2S的出口浓度。 相似文献
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吸附分离技术在大气污染防治中的应用研究 总被引:2,自引:0,他引:2
简述了硝酸尾气、黄磷尾气等污染物中NOχ、SO2、P、As、PH3、CO对生态环境产生的危害,及采用吸附分离技术在治理气体污染物中的应用。 相似文献
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扬子石化贮运厂采用活性炭纤维吸附技术回收苯类尾气,使铁路槽车装卸作业产生的高浓度苯类蒸气经吸附处理后去除率达98.8%,有效地改善了铁路栈台的作业环境,回收的笨类物料经综合利用产生了直接经济效益。 相似文献
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Ping Ning Xiangyu Wang Hans-Jörg BartSenlin Tian Yong ZhangXue-Qian Wang 《Journal of Cleaner Production》2011,19(13):1547-1552
In order to provide comprehensive utilization of high concentration CO for mono-carbon (C1) chemical industry, the purification of yellow phosphorus off-gas is of great concern. In this research, activated carbon (AC) modified by different impregnants were used for removal of PH3, H2S, SO2, COS, and CS2 in yellow phosphorus off-gas. For the removal of PH3, AC impregnated with 0.10 mol L−1 CuAc2 was proved to be the best adsorbent. And removal efficiency of H2S could be significantly enhanced by AC impregnated with 7% Na2CO3. The results of plant experiments suggested that the total concentration of the impurities in yellow phosphorus off-gas was less than 1 mg Nm−3 after purification operation. The metal-modified activated carbon (MMAC) was systematically characterized in terms of XPS, TGA, and DTA. The adsorption reaction mechanism was also investigated. As a result, the yellow phosphorus off-gas purified in this study can be used as a raw material gas in the C1 chemical industry. 相似文献
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吸附法回收化工储运过程溢出气的实践与探索 总被引:1,自引:0,他引:1
慕常强 《安全.健康和环境》2012,12(6):46-48
分析了现有单级活性炭变温吸附回收技术使用现状,同时对目前创新发展的多级活性炭变温吸附回收技术进行了可行性分析,结果表明:在化工储运生产过程中,采用多级活性炭吸附、蒸汽脱附、常温冷却水冷凝技术回收化工储运过程溢出气比较彻底、安全. 相似文献
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Wei Wang Yuxiang Luo Zhou Deng 《Frontiers of Environmental Science & Engineering in China》2009,3(1):20-31
Landfill gas (LFG) utilization which means a synergy between environmental protection and bioenergy recovery was investigated
in this study. Pressure swing adsorption technology was used in LFG purification, and laboratory experiment, pilot-scale test,
and on-site demonstration were carried out in Shenzhen, China. In the laboratory experiment, A-type carbon molecular sieve
was selected as the adsorbent by comparison of several other adsorbents. The optimal adsorption pressure and adsorption time
were 0.25 MPa and 2 min, respectively, under which the product generation rate was 4.5 m3/h and the methane concentration was above 90%. The process and optimization of the pilot-scale test were also reported in
the paper. The product gas was of high quality compared with the National Standard of Compressed Natural Gas as Vehicle Fuel
(GB18047-2000), when the air concentration in feed gas was under 10.96%. The demonstration project was composed of a collection
system, production system, and utilization system. The drive performance, environmental protection performance, and economic
feasibility of the product gas — as alternative fuel in passenger car, truck, and bulldozer—were tested, showing the feasibility
technology for LFG utilization. 相似文献