碱性高炉矿渣制备多孔混凝土掺合料及其净化酸性水的试验研究

碱性高炉矿渣和多孔混凝土都有良好的净水性能,将碱性高炉矿渣作为掺合料制成掺高炉矿渣多孔混凝土(BSPC),对其处理模拟酸性水的效果进行研究。结果表明:经BSPC处理后,进水p H由2~3变成8.5~9.1。与普通多孔混凝土相比,添加高炉矿渣的混凝土对酸性水浊度、CODcr、TP和Cd的平均去除率依次提高了6.2%,8.8%,5.2%和4.5%,分别达到74.3%,74.5%,91.7%和86.5%。同时,BSPC孔隙率在处理酸性水前后有所下降,下降幅度较小,为6.2%,不影响BSPC对酸性水的处理。实验最后对混凝土表面白色絮状物进行了红外和XRD表征,初步分析其中含有CaCO_3、SiO_2和水化硅酸钙(C-S-H)等无机物,初步判定来源于BSPC的溶出物。     

钢渣湿法捕获CO_2反应机制研究

以炼钢过程中排放的固体废弃物钢渣为碳捕获剂,进行了钢渣湿法捕获烟气CO2工艺的实验研究。通过分析钢渣的组成成份及反应机理,研究液固比、反应温度、反应时间、pH值及反应产物等主要参数对钢渣湿法碳捕获状况的影响。实验证明,通过合理的设计和适当的操作,可使钢渣湿法碳捕获效率达60%以上,具有一定的应用价值。     

航空发动机叶片高应力振动疲劳试验技术研究

在电动振动台上对航空发动机叶片进行了高应力振动疲劳试验,详细研究了试验机理,提出了辅助点监测叶片最大振动应力、共振峰后定频率激励等试验方法,并成功利用振动台开环控制技术有效稳定了叶片的振动应力水平,从而获得可靠的疲劳数据。另外,从试验角度出发,对振动台激励与叶片振动应力响应之间的关系进行了研究。     

燃煤电厂电-袋复合式除尘器优化控制的仿真运行研究

以电-袋复合式除尘器为仿真研究对象,在Windows界面下利用Visual Basic6．0编程语言开发出燃煤电厂电-袋复合式除尘器优化控制的仿真运行软件。该软件通过建立数学模型,进行仿真实验,模拟工况变化、优化运行参数等对电-袋复合除尘系统进行整体的优化控制,并综合分析电-袋复合除尘器运行过程中的能耗以及运行费用,对运行电压、电流、运行阻力、喷吹周期等参数进行了优化。该仿真软件达到了电一袋除尘系统的节能降耗的目的,同时也降低了电～袋复合除尘器的运行成本。     

有机胺脱硫工艺在高硫煤地区火电厂的应用分析

近年来,电力行业发展迅速,燃煤电厂大气污染物控制取得很大成就。在电力行业"十二五"规划中,对节能减排工作提出了更高的要求,其中二氧化硫的削减仍占主要地位。本文就高硫煤地区实施有机胺脱硫工艺进行探讨,论述其应用情况、工艺原理,与传统工艺相比的优势、特点及发展方向。     

刮油刮渣机的结构设计与应用选择

介绍了刮油刮渣机的工作原理和基本结构组成及应用结构方式,并从工艺环境及应用选择的性价比方面,提出实际工作时选择刮油刮渣机的注意事项,达到设备的最大合理化应用。     

电石炉炉气电改袋除尘技术

介绍了某厂3台20 000kVA内燃式电石炉炉气除尘系统由原来采用的电式除尘器改为袋式除尘器技术,同时将原系统内的增湿塔改造为强制风冷及预荷电、预除尘设备,这样不但可以降低烟气温度使其满足袋式除尘器对进口烟气温度的要求,同时使微细粉尘荷电凝聚,提高了后续袋式除尘器对颗粒的捕集效率,并降低了袋式除尘器的阻力损失。改造后的系统运行稳定,烟气出口排放浓度满足国家环保要求。     

电动交通工具的污染减排及对策

燃油交通工具是城市温室气体的重要来源之一,因此使用电动交通工具成为解决城市污染减排的重要措施.文章就正确认识电动交通工具污染减排的作用,蓄电池的生产管理、回收利用等进行了讨论,并提出了相应的对策和建议.     

Antimony smelting process generating solid wastes and dust：Characterization and leaching behaviors

A large amount of solid waste has been produced by the antimony smelting process in the＂World Capital of Antimony＂, Xikuangshan area in China. This study comprehensively investigated the physical and chemical characteristics of the various solid wastes, as well as the leaching behavior of the solid wastes, which included water-quenched slag,arsenic-alkali residue, desulfurized slag and blast furnace dust. These four types of waste were enriched in a variety of heavy metals and metalloids and more specifically with As and Sb levels up to 8.6 × 104 and 3.16 × 105mg/kg, respectively, in arsenic-alkali residue. For desulfurized slag and water-quenched slag, the leaching concentration of Sb significantly exceeded the acceptable limits during the leaching tests using the toxicity characteristic leaching procedure and the synthetic precipitation leaching procedure. In addition, As leaching in arsenic-alkali residue was extraordinarily hazardous, being three orders of magnitude higher than the regulatory level of As. According to the results of the extraction tests, all the tested wastes were classified as hazardous waste.     

Microstructure of 2205 duplex stainless steel joint in submerged arc welding by post weld heat treatment

The 2205 duplex stainless steel (DSS) is of both good properties austenitic steel and ferritic steel, which applies to the shipbuilding industry usually. In this paper, the OM, XRD and microhardness test methods are used to analyze the variation of submerged arc welded (SAW) joints with and without post weld heat treatment (PWHT). The research results show that the σ phase disappear in the fusion edge zone near heat affect zone (HAZ) and an increase in the welded center zone during the follow-up PWHT, while the amount of γ phase is decreased in the welded center zone with PWHT. A segregation distribution of some second phases is also found in the welded center zone after PWHT. There have two pick values of microhardness arise in the fusion edge zone and the welded center zone separately without PWHT. However, a maximum value of microhardness at the fusion edge zone near HAZ is disappeared and the other is still held at the welded center zone during PWHT. It can be attributed to the changes of second phases, element diffusions and particle segregation during PWHT. A developing mechanism is issued to demonstrate the second phases transferring of the 2205 DSS SAW joints by PWHT.