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以不粘煤为原料,在运行的Φ3.3m水煤气型两段炉上进行了工业试验,论述了试验过程,原料煤煤质化验及煤气产量、质量、热值等。试验结果:以不粘煤为原料生产城市煤气是可行的,煤气产率为1205Nm ̄3/t;煤气热值为12.06MJ/Nm ̄3。 相似文献
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张玉柱 《煤炭加工与综合利用》1994,(1):36-37
介绍了以灵武煤为原料,在Φ3.3m水煤气两段炉上进行的工业性试验。试验结果表明,采用两段炉工艺生产民用煤气是可行的,煤气产量为1205m ̄3/t,煤气热值为12.15MJ/Nm ̄3。 相似文献
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以不粘煤为原料,在运行的Φ3.3m水煤气型两段炉上进行了工业试验,论述了试验过程,原料煤煤质化验及煤气产量、质量、热值。试验结果:以不粘煤为原料生产城市煤气是可行的。煤气产率为1205m^3/t,煤气产量为2983m^3/h,煤气热值为12.06MJ/m^3。 相似文献
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干燥塔金属丝网除沫器在低气速下的实践和认识 总被引:1,自引:0,他引:1
干燥塔金属丝网除沫器在低气速1.69m/s下操作,仍能得到理想的酸雾指标(0.0092/m ̄3)。其可能性通过简要的理论计算加以说明。 相似文献
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三相气提升循环流化床处理焦化废水 总被引:27,自引:0,他引:27
实验室规模的研究表明,用三相气提升内循环流化床反应器(AILR)处理焦化污水比活性污泥法为优。其处理负荷高,COD的进水负荷为13kg/d·m^3,COD去除的容积负荷可达到7kg/d·m^3。AILR对酚、氰等污染物的耐受力强、去除效果好并具有较低的曝气能耗;其COD去除率为54.4% ̄76%,酚去除率为99.5% ̄99.8%,氰去除率为95% ̄99.2%;曝气能耗是活性污泥法的1/3 ̄1/4。 相似文献
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张华 《煤炭加工与综合利用》1991,(3):16-18
<正> 一、前言“七五”期间国家加快了发展城市煤气事业,在多种气源、因地制宜、合理利用能源的方针指导下,城市燃气事业有了较大的发展。我国城市现有气源种类较多,主要有焦炉煤气、直立式炭化炉煤气、重油裂解气、天然气、液化石油气和矿井气等。这类气源热值高,CO含量低,使用较安全。但使用这类气源受到投资和 相似文献
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总结了金成煤气站投产半年来的经验。结果表明,煤气热值稳定在10.29MJ/m^3以上,一氧化碳含量控制在20%以内,原料煤种范围宽,煤气中的焦油和酚含量低,煤气的材料成本为0.202元/m^3。 相似文献
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浆液循环锥形鼓泡塔反应器的相含率研究 总被引:1,自引:0,他引:1
在浆液循环条件下,考察了以空气、水和石英砂为三相体系的锥形鼓泡塔反应器(Φ顶200mm,Φ底100m,高3000mm)中的相含率及固体颗粒浓度轴向分布。使用压降法和颗粒同步取样方法测量了不同表现气速(0 ̄0.125m/s),表现浆液循环速(0 ̄0.157m/s)以及固体颗粒浓度0 ̄100kg/m^3下相含率分布,并用园柱床的一维沉降-扩散模型近似地描述了固体颗粒辆向浓度分布的规律。在此基础上,本文 相似文献
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秦皇岛市煤气厂外排含酚废水处理的设计简介包头钢铁设计研究院秦皇岛分部李立青一、工程概况秦皇岛市煤气厂为城市提供民用煤气。从法国LGIE公司引进三台3.60m水煤气型二段炉,配套设施为国产设备。设计为二开一备,日产煤气量23×104m3/d。于1993... 相似文献
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寄生杂草大花菟丝子化学防除的研究 总被引:3,自引:0,他引:3
在花菟丝子的“吸器再生”初期和旺盛生长期,进行了化学防除大花菟丝子的除草剂筛选试验,结果表明:0.36%~0.72%止芽素或0.02%~0.05%的草甘脾能有效地防除大花菟丝子的“越冬吸器”及其再生茎灾,0.05%~0.5%草甘膦,0.02%~0.05%甲磺隆和0.36%~0.72%止牙素能防除大花菟丝子的藤茎且对寄主安全。 相似文献
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滇木姜子化学成分初步研究 总被引:1,自引:0,他引:1
目的:研究樟科植物滇木姜子Litsea rubescensLec.var.yunnanensis的化学成分,为其资源开发利用提供依据。方法:采用75%的酒精提取,硅胶层析法分离,结合重结晶方法纯化化合物,根据其理化方法和波谱数据分析进行化合物结构鉴定。结果:从滇木姜子中分离得到4个已知化合物,分别为三十烷酸(triacontanoic acid I),二十六烷酸(hexacosoic acidⅡ)胡萝卜苷(DaucostenolⅢ),β-谷甾醇(-βsitosterolⅣ)。 相似文献
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Highly pure nanosilica was synthesized through a facile hydrometallurgy-based method from silicomanganese slag as a low cost silica source. The synthesis route included short-term nitric acid dissolution at room temperature, gelation, washing, drying, and calcination steps. The experimental dissolution conditions resulted in a dissolution efficiency of 98%. The crystalline structure, chemical composition, chemical bonding, microstructure and elemental analyses, particle size distribution, and surface area of the extracted silica were then studied by appropriate characterization techniques. The characterization findings indicated that the amorphous silica particles had a microporous nature with an average particle size of ~24 nm, exhibiting a high purity of more than 99% and a high specific surface area of ~474 m2 g?1. The overall results indicated that the proposed synthesis route is a promising feasible alternative method to produce highly pure microporous nanosilica from a low cost secondary resource. The proposed method can treat 98% of the slag and uses less chemicals than conventional methods and is therefore a greener nanosilica production process. The current process also competes with the traditional process and other recently introduced processes in terms of process economy and the quality of the produced product. 相似文献
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延胡索的化学成分及质量标准研究 总被引:1,自引:0,他引:1
延胡索临床主要用于活血、理气、止痛。为探究延胡索的化学成分及延胡索质量标准化研究的方法,在大量文献的基础上,综述了延胡索的化学成分及质量标准的实验研究概况。 相似文献
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The dry adhesion strength of polyester/melamine clear coats varying in their branching degrees were applied on galvanized steel panels and investigated by pull-off and T-bend testing. It was found that pull-off tensile adhesion is mainly dominated by the type of coating and less influenced by the pretreatment of the substrate. In contrast, the critical T-bend strain is mainly affected by the surface treatment of the galvanized layer with higher stiffness but lower ductility compared to the clear coat. Pull-off tensile strength at room temperature is correlating with the glass transition temperature Tg and a strong viscoelastic contribution is ascribed to the work of adhesion. Samples with adhesive as well as cohesive failure modes were further investigated by X-ray photoelectron spectroscopy (XPS) to determine the interfacial chemistry. Angle-resolved XPS data suggest that the nitrogen from the melamine crosslinker plays a decisive role for the adhesion of the coatings. Regarding the melamine distribution a micro- and a nanostructural effect has to be considered: while maximum melamine concentrations over coating depth are usually found in the bulk region of these clear coats, this work proposes that the remaining melamine at the interface segregates towards the metallic substrate. 相似文献
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Uniform MoS2 nanosheets/C hybrid microspheres with mean diameter of 320 nm have been successfully synthesized via a facile one-pot hydrothermal route by sodium molybdate reacting with sulfocarbamide in d-glucose solutions. The products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). XRD patterns showed that the MoS2 was kept as a two-dimensional nanosheet crystal and C was retained as amorphous even after their annealing treatment at 800 °C. TEM and SEM images indicated that the MoS2 nanosheets were uniformly dispersed in the amorphous carbon. The experiment results also revealed that the appropriate amount of d-glucose had an obvious effect on the formation of uniform MoS2 nanosheets/C hybrid microspheres. A possible formation process of MoS2 nanosheets/C hybrid microspheres was preliminarily presented. 相似文献
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Li-Xia Yang Jia-Jun YinLu-Lu Wang Guo-Xiu XingPing Yin Quan-Wen Liu 《Ceramics International》2012,38(1):495-502
Hydroxyapatite (HAP) hierarchical microspheres were synthesized by a facile hydrothermal method using calcium nitrate and ammonium dihydrogen phosphate through controlling complexing agents. The influences of two kinds of complexing agents (potassium sodium tartrate tetrahydrate and trisodium citrate) and reaction time on the morphology of HAP crystals have been investigated. These results indicate that complexing agents have a great influence on the morphology of HAP. When potassium sodium tartrate tetrahydrate was used as complexing agent, HAP flowers were composed of the network of nanosheet building blocks. Well-crystallized HAP dandelions with nanorods radiating from the center can be obtained by the introduction of trisodium citrate. Broader XRD diffraction peaks imply a nanometer scale size. Based on XRD and SEM results, the formation mechanism of HAP crystals has been discussed. The hierarchically structured HAP microspheres were explored as drug carriers. The results indicate that HAP flowers and dandelions showed a favorable sustained release property for ibuprofen; thus, they are very promising for application in drug delivery. 相似文献
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Pure phase BiFeO3 powders were successfully synthesized in molten alkali metal nitrates (KNO3–NaNO3) at 500 °C. The as-prepared BiFeO3 had a rhombohedral structure which was studied using X-ray diffraction. The plate-like morphologies were investigated through scanning electron microscopy and transmission electron microscopy. The average length and width of BiFeO3 plates were 400 and 200 nm, respectively. Furthermore, the mechanism of formation of BiFeO3 was also discussed through X-ray diffraction, thermogravimetry, differential thermal analysis and mass spectrometry. 相似文献
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Flower-like 3D ZnO microstructures constructed from nanorods of different sizes were prepared by a microwave hydrothermal (MH) process in the presence of o-, m- and p-nitrobenzoic acid, respectively. Well-crystallized flower-like ZnO microstructures were obtained after 10 min MH treatment. The X-ray powder diffraction (XRD) test indicated that all the products were consistent with the hexagonal ZnO phase, and scanning electron microscopy (SEM) investigation revealed that the flower-like 3D ZnO microstructures were built with sword-like nanorods 60-100 nm in width and several micrometers in length. The formation mechanism of these flower-like 3D ZnO microstructures is discussed briefly. The gas sensitivity of the as-prepared ZnO microstructures to ethanol at different operation temperatures and concentrations was also studied. The results indicated that the gas sensitivity of the ZnO microstructures was influenced by the particle size and microcosmic configuration, the larger particles with crowded nanorods having higher gas sensitivity. 相似文献