改善链条炉燃烧的几种有效方法

采用燃煤布湿和安装分层燃烧装置 ,较好地解决了锅炉燃烧不完全的问题 ,降低了煤耗 ,提高了锅炉的热效率     

锅炉房存在的问题及改进措施

为确保锅炉安全运行 ,对改建的锅炉房存在的问题提出改进措施     

一起非法自制的土锅炉爆炸事故分析

通过介绍自制土锅炉的结构及制造过程,分析了其发生爆炸事故的原因。     

燃煤手烧炉烟尘生成特征及其控制

使用烟气净化测试系统,对燃煤手烧炉燃烧过程烟尘浓度变化进行了在线测定,对水浴净化前后烟气中的颗粒分散度进行了测定分析,并对SW型烟气净化装置的除尘效率进行了测定计算。实验表明,燃煤手烧炉的烟尘生成过程,与其加煤方式直接相关,且受燃烧温度的一定影响。在正常工作条件下,SW型燃煤炉窑烟气净化装置的平均除尘效率可达96 4%。     

燃煤手烧锅炉除尘器的研究与开发

介绍了一种集多种湿法除尘技术之长于一体的新型组合式除尘装置,该装置不仅能有效地消除手烧锅炉燃烧时产生的烟尘,而且实现了除尘水的内循环,消除了其他湿式除尘器所带来的水的二次污染问题。     

蒸汽锅炉改热水锅炉应注意的问题

系统地分析了蒸汽锅炉在改装为热水锅炉时存在的问题,提出改进方法及今后的注意事项。     

Oviposition of carrot fly (Psila rosae) in response to foliage and leaf surface extracts of host plants

Summary. Foliage of twelve host and two non-host species and surrogate leaves treated with the respective leaf extracts were presented to laboratory populations of the carrot fly (Psila rosae) in oviposition choice assays. The stimulatory activity of dichloromethane surface extracts and the diethyl ether fraction of hot water extracts did not reflect accurately the differences in acceptability observed among intact leaves. A better correlation was found using hexane extracts prepared in a microwave oven. Two out of five fractions of this crude hexane extract obtained by silica gel column chromatography stimulated oviposition. The diethyl ether fraction, which contained the previously identified oviposition stimulants (propenylbenzenes, furanocoumarins, polyacetylenes), could account for only a minor part of the variation in the acceptability of host leaves. The preference hierarchy for intact leaves corresponded better to the ranking of species according to activity of the methanolic fraction, which apparently contains unknown stimulatory compounds.? The water fractions of the hot water extracts were shown to reduce egg-laying underneath surrogate leaves treated with a stimulatory extract. This oviposition-deterring effect was particularly strong with the non-preferred species Pimpinella major, which is also highly resistant in the field. Hence, unidentified inhibitory compounds may also contribute to differential accept ability of host plants. It is concluded that antixenotic (non-preference) resistance of host plants to carrot fly attack depends on complex mixtures of semiochemicals. Received 11 June 1997; accepted 26 November 1997.     

基于热线法的不同水分含量松散煤体热物性实验与模拟研究

为解决松散煤体热物性参数的测试周期长与实验误差大等问题,构建测试装置实验平台,结合交叉热线法和平行热线法,对松散煤体热物性参数进行准确测量与计算,对1～2 mm,0.5～0.6 mm和0.2～0.3 mm 3种不同粒径煤样在不同水分含量下的热物性参数的变化规律进行研究,利用Fluent数值模拟软件对松散煤体温度场进行模...     

一起立式锅炉爆炸事故原因分析及隐患排查

采用现场勘察、光谱分析和金相检验等方法对一起立式锅炉爆炸事故进行原因分析,发现该锅炉制造时存在严重未焊透的设备缺陷和其他使用管理方面的问题。为此制定了超声波检测工艺,对本地区同一制造厂生产的在用锅炉进行隐患排查。对排查发现存在严重制造缺陷的锅炉进行现场维修或召回,对排查发现的使用管理方面的问题也一并跟踪整改。     

聚二甲基二烯丙基氯化铵改性高炉渣的制备及其应用

用聚二甲基二烯丙基氯化铵(PDMDAAC)改性高炉渣以提高其对印染废水的处理能力.研究了改性过程中改性剂浓度、温度和制备时间对改性效果的影响,对模拟印染废水和实际印染废水进行了处理,表明PDMDAAC改性大大提高了高炉渣对染料的吸附能力.