Although oil is used only in the case of ignition and low load operation , the amount is very great . in order to save the precious and expensive oil , a novel technology , induction - heating multi - stage free - oil ignition technology of pulverized coal ( mfit ) , is brought forward in this thesis . based on the study of ignition mechanism of coal , ignition criterion , heating method and ignition theory of pulverized coal ( pc ) , mfit integrates hot - wall ignition technology , induction heating technology and multi - stage ignition technology 为降低电站锅炉点火成本和低负荷运行费用、解决电站锅炉点火用油和低负荷助燃用油居高不下的问题，在分析研究煤的着火机理、着火判据、加热方式和煤粉的点燃理论的基础上，本文将热壁面点火、感应加热、多级点火等过程有机地结合起来，进行了感应加热煤粉多级无油点火的试验研究。
But it also bring some important questions which affect the safety and economy running of the units , such as frequency regulation , long running with low loads , electric equipment and assistant equipment friction , oil wasting etc . the text apply differential increcent rate of equilateral discharge to analyze deeply the economy of hydro - power plant according to the practice data of the plant , putting forward the resolvation , providing indeed the theoretic feasibility investigation of engineering 但由此带来的水电机组的频繁调节、长时间带低负荷运行以及电气设备和辅助设备的磨损和油耗的增加等，都成为影响水电机组长期安全、经济运行的不可忽视的重要问题。本文根据安徽陈村水电厂实际资料，运用等微增率方法对agc投入后水电站厂内运行经济性作了深入的分析，提出了解决办法，为在工程上真正实现提供了理论上的可行性研究。
Presents the steady - state programming with constant coolant average temperature and constant live steam pressure , an ideal programming for marine nuclear power plant ( npp ) , under which , both the coolant average temperature and the live steam pressure of nuclear steam supply system ( nsss ) are constant when the steady state operating condition is varied , and points out that in comparison with the steadysate programming with constant coolant average temperature , the ideal programming can improve the overall operating performance of npp effectively , especially in low - load range , for instance , raise the heat efficiency of npp , decrease the operating noise of main coolant pump , and improve the conditions of design , operation and control of the secondary loop system 双恒定运行方案是船用压水堆核动力装置的理想运行方案.在这种运行方案下，当装置稳态功率变化时，冷却剂平均温度与蒸汽压都保持不变，与通常采用的冷却剂平均温度恒定运行方案相比，有效地改善了核动力装置的总体运行性能，特别是在低负荷运行时，可以提高装置经济性、降低主泵运行噪声、改善二回路系统的设计、运行和控制条件，这对于提高船用核动力装置的运行可靠性和安全性具有实际意义
Using the opened thermosiphon of 38x3 as experimental element and water as working fluid , the characteristics of dynamic low load boiling , stable severe boiling heat transfer coefficient and critical heat flux are gotten for the opened thermosiphon at the pressure of 0 . 02 - 0 . 1mpa and 0 . 1 - 0 . 8mpa respectively , which makes up the drawback that the opened thermisiphon has not yet accurate boiling heat transfer relationship formulas . by means of experimental results , an opened thermisiphon waste heat recovery boiler is designed for the high temperature gases that the positi e electrode copper refining furnace exhaust , which overcomes effectively the drawback of short life , little capacity and unable to inspect that the closed steel - water thermosion has 本文以工程上常用的38 3的开口封底为实验元件，以水为工质，对开启式热管内的动态低负荷沸腾、稳态旺盛沸腾及临界沸腾特性进行系统的可视化实验研究，实验压力为0 . 02 0 . 8mpa ，实验得出了38 3的开口封底管在工作压力为0 . 02 0 . 8mpa和0 . 1 0 . 8mpa下的管内沸腾传热系数及临界热负荷计算关联式，弥补了开口封底管? ?这一新型传热元件尚无准确的沸腾换热关联式的缺陷。
By heat - trial n cold - trial and operating experience in half a year , the practice prove that : the horizontal concweak ellipse cone combustion technology with primary air and secondary air added side secondary air , have the ability of preventing slagging ^ high - temperature corrosion and stable combustion onlow - load condition . shigeng - ling ( power engineering ) direected by prof 经冷态和热态试验及半年来的运行考验，实践证明：一、二次风同心反切加侧二次风水平浓淡煤粉椭圆锥燃烧技术，具有防止结渣、高温腐蚀和低负荷稳燃的能力。
The problem of coal fired boiler burning residue is common in many power plants . it is also unsolved critical problem for safe , economical and stable operation of power plants . during the last decades , this problem caused countless accidents in domestic power plants , they resulted in equipment damages , personal injuries or death , and even enomorous econoimic lose 几十年来,国内燃煤电厂由于炉内结渣引起的各种设备、人身事故不计其数,轻则导致锅炉低负荷运行或停炉清渣,产生巨大经济损失,重则导致设备损坏,甚至引发人身事故。
