某厂锗煤反射炉收尘系统问题探讨

文章介绍了某厂改造后的锗煤反射炉收尘系统，并对该收尘系统中存在的问题进行了分析和探讨。     

神府、东胜、大同煤在内热式直立炉中的应用

介绍了利用神府、东胜、大同煤在内热式直立炉中炼焦的生产情况，所生产的焦炭可作为优质的铁合金、电石和合成氨专用焦。     

热管废热锅炉在发生炉煤气余热回收中的应用

将发生炉煤气生产流程中高竖管改造为热管废热锅炉，介绍了工艺流程，分析了温度、阻力降、积灰等对系统的影响及应对措施，每年可产生效益120万元。     

安徽省火电厂入厂煤采制现状及存在问题浅谈

详细介绍了我省火电厂入厂煤和入炉煤的采样、制样现状和存在的问题。指出了现存的问题既有从业人员对采制标准的理解不够和执行不力等主观上原因，又有标准的某些条款规定过于笼统、欠科学性及缺少可操作性等客观上的原因，并对现行的采制标准中某些内容谈了作者的看法。     

洁净煤技术与中国的电力发展

我国以燃煤为主的电源结构造成的污染十分严重，如何合理规划我国发电的能源结构，是实现国民经济可持续发展的关键问题。分析了我国电力发展现状及电源结构的特点，并与发达国家进行了比较。叙述了实现这一目标的我国电力发展规划中的一些重要方向，着重分析了各种洁净煤发电技术在中国的应用现状和发展前景。     

超细煤粉再燃技术及其低NO_x排放分析

超细煤粉再燃技术是燃煤电站实现低NOx排放的关键技术之一.结合超细煤粉再燃机理,对低NOx排放的主要影响因素:燃料特性、煤粉细度、在再燃区的停留时间、再燃区反应温度、再燃燃料比和过量空气系数等进行了综合分析,得出了只要燃烧条件选择合理,采用低挥发分的烟煤代替高挥发分的烟煤或褐煤作为再燃燃料也是可行的结论.     

我国核电发展前景

根据我国能源需求的状况,通过对核电与煤电的比较分析,从缓解煤炭紧张、净化环境、经济上的优势及安全性4 个方面,论述了发展核电的必要性和可行性．同时,介绍了我国和世界核电发展的现状,展望了我国核电发展的前景．     

Application of Fuzzy-PID Control System in Full-Mechanized Coal Face

The control system, which includes structure, the composition of software and hardware, the form of PID control system and its systematic closed-loop, was used in No.4236 full-mechanized coal face of Xinlongzhuang mine.The typical fuzzy PID control system structure was investigated, and a simplified fuzzy PID control system was taken the place of the complex three-dimension fuzzy controller. Based on the parameter relation between fuzzy controller and normal PID controller, a common method of parameter adjustment of PID controller was summed up and the computer simulation was realized. This system can overcome the problems of large delay, nonlinear, poor running environment and great load change in the full-mechanized coal face. The simulating investigation indicates that the designing method of fuzzy controller is simple and feasible.     

Two-stage numerical simulation for temperature profile in furnace of tangentially fired pulverized coal boiler

Considering the fact that the temperature distribution in furnace of a tangential fired pulverized coal boiler is difficult to be measured and monitored, two-stage numerical simulation method was put forward. First, multifield coupling simulation in typical work conditions was carried out off-line with the software CFX-4.3, and then the expression of temperature profile varying with operating parameter was obtained. According to real-time operating parameters, the temperature at arbitrary point of the furnace can be calculated by using this expression. Thus the temperature profile can be shown on-line and monitoring for combustion state in the furnace is realized. The simulation model was checked by the parameters measured in an operating boiler, DO130-9. 8/540. The maximum of relative error is less than 12% and the absolute error is less than 120℃, which shows that the proposed two-stage simulation method is reliable and able to satisfy the requirement of industrial application.     

Study on M／A islands in pipeline steel X70

The free structure of M/A islands in pipeline steel X70 has been studied by transmission electron microscope (TEM). It is shown that the M/A islands are about 1-2 μm in size and distribute at the grain boundary of irregular massive ferrite or acicular ferrite in the microstructure of the steel undergoing TMCP (thermo-mechanical controlled processing). The analysis of diffraction contrast shows that the M/A islands consist of retained austenite and some martensite lamellae different in size and orientation. The microtwinning and midrib exist in the lamella of lenticular martensite, which exhibit the typical character of high-carbon martensite. The influences of TMCP parameters on M/A islands have been studied carefully. With the increase of the cooling speed, the amount of M/A islands decrease slightly and the morphology of M/A islands changes to thin dispersive short bars from thick irregular long strips.