在线树脂富集流动注射法测定水中痕量酚

研究了用流动注射分析中的流体动力学注入技术与在线树脂富集相结合的方式，富集水中痕量苯酚，以４－氨基安替比林比色法测定的方法。结果表明，当进样频率为２４个样品每小时时，方法的检出限为０．０５ｍｇ／Ｌ，线性范围为０．０５～７ｍｇ／Ｌ；对水中苯酚重复测定１０次，相对标准偏差小于２％；回收率为９９％～１０５％。     

Kinetic-spectrophotometric determination of free cyanide by stopped-flow reversed flow injection analysis

A stopped-flow reversed flow injection method for the determination of free cyanide is proposed. Pyridine-barbituric acid mixture is injected in the flow system as reagent to form the colour species with cyanide. The flow is stopped when the reagent zone comes in the flow cell, where absorbance-time data are collected at 580nm wavelength. The linear range of the determination is 0.1 -10μg/ml CN-. The sampling rate is 60h-1 and the relative standard deviation is 1.6% (n=16) at 5.0 μg/ml CN-1 level. With satisfactory results, the proposed method was applied to the determination of free cyanide in wastewater without sample pretreatment.     

声波清灰技术在滤筒除尘器上的应用实验研究

在脉冲喷吹的基础上，向滤筒除尘系统中导入声波，以改善清灰效果，并通过实验得出两者的最佳组合方式。调节声波相关参数，得出声波的频率和声压对清灰效果的影响关系，并找到最佳频率。     

氨法脱硫在热电厂中应用

随着二氧化硫对环境的污染越来越严重，国家环保局对燃煤电厂二氧化硫排放进行严格控制，电厂加装脱硫装置是迟早的事。阐述了氨法脱硫的工艺流程和自动控制．同时结合工程调试中出现的问题进行分析，为今后的脱硫工程提供一些借鉴。     

VE泵端面凸轮冷/温复合成形技术研究

采用温锻制坯与冷摆辗相结合的复合成形工艺生产VE泵端面凸轮精密成形件,不仅材料利用率可达到95%左右;而且成形件的尺寸精度高,表面光洁度高,能有效地减少后续仿形磨削加工的余量,从而降低了生产成本,提高了生产效率。采用该工艺可以进行大批量生产,能满足我国轻型汽车VE泵的生产需要。     

化学发光流动注射法测定雨水中过氧化氢

用化学发光流动注射分析装置,将16孔阀连接成异步双流路,以过氧化氢-鲁米诺-钴(Ⅱ)为化学发光体系,建立了快速测定雨水中过氧化氢的方法,最低检测限为0.1ng/ml,在0.1—400ppb范围内有良好的线性关系,相对标准差为0.78—3.03％,每小时可分析480个以上的样品.     

西部地区经济发展与水环境质量的相关分析

认识经济发展与水环境污染的关系,以求西部地区经济与环境的协调发展。文章运用环境库兹涅茨理论和自回归分析模型,对1995～2004年我国西部地区人均GDP与废水排放量的分析,可知西部地区的人均GDP增加1%,则污水排放量增加0.582%,经济发展伴随着水环境质量的持续恶化,说明西部地区目前处于环境库兹涅茨曲线的左半部分。因此有必要加强对水环境的规制和治理,改善经济发展和水环境质量之间的这种两难关系。还表明自回归模型对于西部地区水环境质量的预测也是有效的。     

主汽管噪声原因分析及处理对策

随着环保要求的日益严格，工业噪声作为一大污染源越来越受到人们的关注。通过对噪声产生机理的分析，确定了主汽管噪声的生成原因，介绍了几种降噪措施及其效果，对电厂管道设计和阀门选型具有借鉴意义。     

预防煤炭自燃的注砂技术实验研究

山砂是我国西北部矿区地表的主要自然资源之一,但如用其直接作为煤矿注浆防灭火的原料,不仅会造成输送管路的堵塞,还会引起输送管路的严重磨损。为此,首先研究了常见增稠剂羧甲基纤维素、聚丙烯酰胺和聚丙烯酸钠等对砂粒的悬浮性能,实验结果表明它们只能延缓砂粒的沉降。进而从理论上分析了砂粒悬浮的条件,发现具有一定屈服应力的假塑性流体特性的液体才能悬浮砂粒;并且悬浮砂粒粒径越大,所需屈服应力也越大。基于理论分析,研制了具有该特性的浆液,山砂在该浆液中不仅具有良好的悬浮性能,浆液还具有输送阻力小的特性。管道输送试验表明,浆液稳定性和流动阻力符合实际要求。     

Comparative study on effect of blending,thermal barrier coating (LHR) and injector nozzle geometry on biodiesel-fuelled engines

Increased petroleum prices, increased threat to the environment from exhaust emissions and global warming have generated intense international interest in developing renewable and alternative non-petroleum fuels for internal combustion engines. Evolving suitable technology for addressing energy crisis creates a continued investigation into the search for sustainable and clean-burning renewable fuels. This work investigates suitability of different non-edible-derived biodiesels such as cotton seed oil methyl ester (COME), Honne oil methyl ester (HnOME) and Rubber seed oil methyl ester (RuOME) to four stroke, single cylinder compression ignition (CI) engine. Engine tests were conducted to study the effect of fuel blending, thermal barrier coating (TBC) or Low Heat Rejection (LHR) and injector nozzle geometry on the performance, combustion and emission characteristics of COME, HnOME and RuOME in the modified CI engine. Blends of biodiesels with diesel were varied from 20 to 80% in steps of 20%. Two thermal barrier coatings of partially stabilized zirconium (PSZ) and aluminium oxide (Al₂O₃) were provided on the engine to make it fully adiabatic. Nozzle injectors of 3, 4 and 5 holes, with size of orifice varied from 0.2 to 0.3 mm size were selected for the study. It was concluded that B20 biodiesel blend, PSZ-coated engine and four hole nozzle injector of 0.2 mm size resulted in overall better engine performance with increased brake thermal efficiency (BTE) and reduced HC, CO, smoke emissions for the fuel combinations tested. Combustion analysis to study the effect of biodiesel blends, LHR coatings, injector nozzle geometry on the performance of the biodiesel-fuelled engine has been presented to give more insight into the behaviour of operation.