改造加热炉系统 提高加热炉热效率

分析了重整装置加热炉热效率低的原因，介绍了提高加热炉热效率采取的几项措施。     

Microwave plasma combustion of coal

Microwave plasma is studied as an alternative to oil or gas fuel for ignition and stabilisation of burning of lean coal. The study is performed on an experimental set-up, which includes a burner with a microwave plasma generator, coal and air supply systems, and measurement equipment. Power and thermochemical characteristics of the coal-plasma interaction have been measured and analysed. The obtained results indicate an essential intensification of ignition and combustion processes in the microwave burner compared to those in conventional burners. In particular, it has been demonstrated that the microwave energy consumption is only about 10% of the required expenditure of oil or gas, measured in heat equivalent. A design of an industrial microwave-plasma burner is proposed. Prospects of such burner for applications at industrial boilers of power plants are discussed.     

新型煤粉燃烧器的特性分析和产能发挥探索

实践证明,一次风用量、风道风速、旋流风的旋转和扩散、风压、二次风温、喂煤系统的计量准确性和稳定性是影响燃烧器性能发挥的主要因素。燃烧器的调试工作是一个复杂的系统工程,必须有计划、按步骤进行。燃烧器在使用中,要加强检查维护,对出现的损伤要及时进行修理。     

四通道旋风煤粉燃烧器的开发试制

四通道旋风煤粉燃烧器是由法国PILLARD公司引进的，用于水泥企业的回转窑中的消耗备件，国内很多科研单位开展了这方面的研制工作，取得一定的成效。本文就本公司在这方面所做的一些探索总结出来，供相关人员参考。     

142t/h锅炉故障跳闸原因探讨

介绍了广钢热电厂142t／h锅炉的特点及存在的问题，分析了引起锅炉跳闸的原因。同时介绍了热电厂采取的锅炉燃烧器、BMS控制系统炉膛火焰监测器等改进措施。     

电站煤粉锅炉燃烧设备改造及燃烧优化

简要介绍了菏泽电厂#2锅炉燃烧器和卫燃带改造的前提和内容以及改造后的燃烧优化方案,并对改造后的效果进行了分析。     

Effects of nozzle length on flame and emission behaviors of multi-fuel-jet inverse diffusion flame burner

An experimental study was performed to investigate the effects of the nozzle length on the air-pollutant-emission and noise-radiation behaviors of a burner utilizing a multi-fuel-jet inverse diffusion flame (MIDF). Comparison of the experimental results obtained from two MIDF burners, one with a long nozzle and the other with a short nozzle, operating under the same air/fuel supply conditions (Re_air and Ф) shows rather significant differences in the flame appearance, flame centerline temperature, CO/CO₂ concentrations and the noise radiation. The nozzle length influences development of the jets and hence interaction between the air/fuel jets including their mixing process. The short nozzle produces a flame with a shorter base height and a smaller potential core due to the enhanced air/fuel mixing. It also leads to faster and more complete combustion at the inner reaction cone of the flame due to the stronger and faster air/fuel mixing. The nozzle length affects the CO and CO₂ concentrations, and higher peak values are obtained with the short-nozzle flame. Flame noise of the MIDF is defined as the noise radiation at different flame heights, which is of varying strength but of the same dominant frequency in the range of 250–700 Hz. The noise radiation from the inner reaction cone of the flame is stronger than that from the lower and upper parts of the flame, and the maximum noise radiation occurs when the total amounts of air and fuel in the combustion zone are at the stoichiometric air/fuel ratio. For all the experiments conducted in the present study, the MIDF produced by the long nozzle is always noisier than its counterpart and it is due to the increase of the low-frequency noise components.     

冲天炉气氛监控仪的研制与应用

本仪器以惠斯登电桥原理的热导式气体检测装置为主要部件，并附有连续抽气、过滤冷却和排除干扰气体的吸附装置等组成部分．它不仅能对熔炼全过程的炉气中ＣＯ２的成份进行准确而迅速地测量与显示，而且能通过排除干扰气体的测量，间接地测出气氛中氢气含量的多少．本仪器在生产实践中使用证明：炉气中ＣＯ２含量的相对变化与铁水过热温度有明显的对应关系，用本仪器所指示的ＣＯ２含量的变化规律对炉况进行监控是行之有效的手段．     

煤粉锅炉稳燃途径述评

对国内应用的几种稳燃方法的原理、稳燃装置的结构、煤种适应性以及运行状况等进行了阐述,并提出了对煤粉锅炉稳燃问题的几点看法。