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火电厂锅炉烟气脱硫脱硝协同控制技术研究进展和建议 总被引:1,自引:0,他引:1
本文分析了开发火电厂锅炉烟气脱硫脱硝协同控制技术的必要性,介绍了多种国内外正在应用和尚在研究开发的烟气脱硫脱硝协同控制技术,最后本文指出当前烟气脱硫脱硝协同控制技术存在的问题主要是大部分技术还不成熟,建议我国应该尽大力开发和推广烟气脱硫脱硝协同控制技术,对已开发出来的技术和设备要进一步完善使之更适合我国国情。 相似文献
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火电行业燃煤烟气是SO_2、NO_x和烟尘的主要来源之一,造成的环境污染非常严重,对人体健康和区域经济发展均产生了不良影响。随着《火电厂大气污染物排放标准》和环境保护部《关于执行大气污染物特别排放限值的公告》的实施,对燃煤烟气的脱硫脱硝一体化处理成为各企业亟待解决的难题。文章着重介绍了某火电厂采用脱硫脱硝一体化技术对原烟气处理系统进行改造的情况,改造后烟气中的SO_2、NO_x、烟尘等指标均实现了稳定达标排放。 相似文献
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燃煤烟气脱硫脱硝一体化技术是一种创新型、高效技术。近几年,随着社会经济快速发展将会燃烧大量燃煤,燃烧的燃煤会释放出来很多有毒气体,这些有毒气体对空气环境将会产生很大影响。使用脱硫脱硝一体化技术在一定程度上能够很好解决这些问题。对此本文将围绕燃煤烟气脱硫脱硝一体化技术研究进展为中心,对脱硫脱硝、气化固化脱硫脱硝技术、高能电子氧化技术、固相再生脱硫脱硝技术、选择性催化脱硫脱硝工艺等几项技术进行综合分析。 相似文献
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工业化发展进程推动了社会经济建设水平,但是也对自然生态系统造成了较为严重的破坏影响,进而对人们日常生活与工业生产造成一定的干扰。为保证工业化发展的可持续性和环保性,降低工业建设对生态环境的影响,我国政府部门不断出台相关文件和法律条例,对各行业发展生产进行明确规定。火电厂在发展过程中会产生大量的烟气,其中含有氧化氮和氧化铁等物质,对周围生态环境具有十分严重的污染破坏,因此需要相关部门和企业利用科学技术和手段加强大气污染与治理。基于此,本文对烟气脱硫脱硝技术在火电厂大气污染治理中的应用情况进行详细分析,在明确烟气脱硫脱硝技术的基础上,深入探究不同烟气脱硫脱硝技术的具体情况,并提出了烟气脱硫脱硝技术的应用保障对策,以供参考。 相似文献
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燃煤烟气脱硫脱硝一体化技术研究进展 总被引:1,自引:0,他引:1
燃煤烟气是二氧化硫和氮氧化物的最主要来源,对生态环境影响极大。开发技术简单,投资少,运行成本低,具有良好运行性能的脱硫脱硝一体化技术已成为各国控制烟气污染的研发热点。文章重点介绍已成熟或尚在研究的各种固相吸附/再生脱硫脱硝法、气/固催化脱硫脱硝法、液相脱硫脱硝法和高能电子活化氧化法等一体化技术及其最新进展,分析了相关技术原理、优缺点及应用前景。立足于中国基本国情,分析了大力发展和推广燃煤烟气脱硫脱硝一体化技术的必要性和紧迫性。 相似文献
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为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。 相似文献
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Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders,
but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled
VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-2H3]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s
syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting
that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the
ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the
corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured.
A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis
and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994. 相似文献
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The proportions of the different lecithin fractions have been determined in HeLa and KB tissue culture cells and Ehrlich Ascites
tumor. 82.8% of the total phosphatidyl choline phosphorus is found in fraction 3 of HeLa cells. The major phosphatidyl cholines
found in KB cells and Ehrlich Ascites tumor are in fractions 3 and 4 and representing 66.6% and 88.7% of the total phosphatidyl
choline P, respectively. The incorporation of 1,2-14C-choline and 1,2-14C-ethanolamine into the various phosphatidyl choline fractions has been assayed to determine their biosynthesis in Ehrlich
Ascites tumor. The incorporation of 1,2-14C-choline into fractions 3 and 4 is 100 times the 1,2-14C-ethanolamine. This evidence indicates that the methylation pathway of phosphatidyl choline synthesis is very low in HeLa,
KB and Ehrlich Ascites cells.
One of 13 papers presented at the symposium “Lipid Metabolism in Cells in Culture,” AOCS Meeting, Houston, May 1971.
Part of a thesis submitted to the Graduate School of the University of North Dakota in partial fulfillment of the Degree of
Master of Science. 相似文献