锅壳锅炉与水套炉受压元件强度计算比较分析

对锅壳锅炉和水套炉的主要受压元件的强度计算和结构型式进行了比较。分析表明：基于GB／T16508的水套炉强度计算，能够满足安全}生能的要求，是水套炉优化研制的发展方向。     

90t／h循环流化床锅炉经济性与安全性分析

通过对90帆循环流化床锅炉经济性与安全性分析，提出了切合实际的解决办法。对于锅炉优化控制及提高其经济性与安全性具有一定的意义。     

石墨炉原子吸收光谱法测定水环境中的铍含量分析

本文阐述了使用石墨炉原子吸收光谱法测定江水中铍含量的方法与步骤。选用原子吸收分光光度计和铍元素空心阴极灯进行样品测定,试验结果显示,该方法的检出限为0.00223μg/L,回收率为95%~98%之间,线性范围分别为0~2μg/L,是一种简单、快速、准确测定水质中铍含量的较好的检测方法。     

生物质还原剂对转底炉直接还原工艺的影响

选取竹炭、木炭、秸秆纤维3种生物质还原剂以及煤粉进行铁矿含碳球团的制备与还原焙烧试验,并从金属化率、抗压强度和体积收缩率三方面分析了生物质还原剂对转底炉直接还原工艺的影响。结果表明:生物质能够替代传统还原剂用于转底炉直接还原工艺。与传统还原剂相比,生物质还原剂在含碳球团金属化率方面的影响较小,但对含碳球团强度和体积收缩率等方面的影响较大。秸秆纤维含碳球团的强度相对较高,但竹炭和木炭含碳球团的强度较低;使用竹炭作还原剂的球团前期膨胀较其他还原剂更为严重,影响含碳球团的强度和热量传递,需与其他还原剂搭配使用。     

石墨炉原子吸收光谱法测定土壤中痕量铋

建立了微波消解土壤、石墨炉原子吸收法测定土壤中痕量铋的方法。采用磷酸二氢铵作为基体改进剂,热解涂层石墨管,塞曼扣背景。此方法对测定土壤中铋的灵敏度、准确度都有很大的提高。方法的最低检出浓度为0.02μg/g,加标回收率为94.5%~103.8%,能够满足环境监测分析的要求。     

Graphene-supported nanoscale zero-valent iron：Removal of phosphorus from aqueous solution and mechanistic study

Excess phosphorus from non-point pollution sources is one of the key factors causing eutrophication in many lakes in China,so finding a cost-effective method to remove phosphorus from non-point pollution sources is very important for the health of the aqueous environment. Graphene was selected to support nanoscale zero-valent iron(nZVI)for phosphorus removal from synthetic rainwater runoff in this article. Compared with nZVI supported on other porous materials,graphene-supported nZVI(G-nZVI) could remove phosphorus more efficiently. The amount of nZVI in G-nZVI was an important factor in the removal of phosphorus by G-nZVI,and G-nZVI with 20 wt.% nZVI(20% G-nZVI)could remove phosphorus most efficiently. The nZVI was very stable and could disperse very well on graphene,as characterized by transmission electron microscopy(TEM) and scanning electron microscopy(SEM). X-ray photoelectron spectroscopy(XPS),Fourier Transform infrared spectroscopy(FT-IR) and Raman spectroscopy were used to elucidate the reaction process,and the results indicated that Fe-O-P was formed after phosphorus was adsorbed by G-nZVI. The results obtained from X-ray diffraction(XRD) indicated that the reaction product between nZVI supported on graphene and phosphorus was Fe3(PO4)2·8H2O(Vivianite). It was confirmed that the specific reaction mechanism for the removal of phosphorus with nZVI or G-nZVI was mainly due to chemical reaction between nZVI and phosphorus.     

乌鲁木齐市茶浴炉生产和运行状况的调查

茶浴炉是一种小型自然引风为主的常压锅炉，生产工艺和技术要求较低，审批准建锅炉房手续简便，本市现有茶浴炉生产厂家数十家，在用茶浴炉3000台左右，主要为双层反烧式茶浴炉。这种茶浴炉以原煤为燃料，利用二次燃烧使燃料充分燃烧，提高热效率，减少烟尘的排放。我们在调查中发现，若产品质量不过关或违章操作，会造成茶浴炉非正常燃烧，导致烟尘排放浓度严重超标，从而加剧城市大气污染。卫茶浴炉的基本结构和燃烧原理1．l基本结构反烧式茶浴炉炉体分为上、下两层炉排，上层为钢管水冷炉排，下层为铸铁炉排。水冷炉排上设有加煤门，两层…     

金川公司第一冶炼厂闪速炉电收尘器改造

针对金川公司第一冶炼厂闪速炉电收尘器运行中发现的问题，进行了追踪分析，提出了消缺改造方案并得到了实施。通过改造后的运行实践，对有色行业电收尘器的设计与选型提出了应注意的事项与建议。     

NH4NO3-Pd(NO3)2联合基体改进剂石墨炉法测海水中痕量镉

用NH4NO3-Pd(NO3)联合基体改进剂,石墨炉法直接测海水中痕量镉.通过不同条件的实验,确定了最佳的分析条件;并通过对实际样品平行性和加标回收率的测定,验证了方法的精密度和准确度.建立了空白实验,在0.19～5.0μg/L线性范围内,镉的最低检出限为0.19μg/L.实验结果表明,该方法快速方便,提高了分析效率,准确度高,精密度好.